[libpng10] Imported from libpng-1.0.53rc01.tar

ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.6.0beta05 - February 3, 2012
+Libpng 1.0.53rc01 - February 18, 2010
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -9,110 +9,71 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.6.0beta05.tar.xz (LZMA-compressed, recommended)
-   1.6.0beta05.tar.gz
-   1.6.0beta05.tar.bz2
+   libpng-1.0.53rc01.tar.xz (LZMA-compressed, recommended)
+   libpng-1.0.53rc01.tar.gz
+   libpng-1.0.53rc01.tar.bz2
+
+Source files with LF line endings (for Unix/Linux) without the
+"configure" script
+
+   libpng-1.0.53rc01-no-config.tar.xz (LZMA-compressed, recommended)
+   libpng-1.0.53rc01-no-config.tar.gz
+   libpng-1.0.53rc01-no-config.tar.bz2
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp160b05.7z  (LZMA-compressed, recommended)
-   lp160b05.zip
+   lp1053r01.zip
+   lp1053r01.7z
+   lp1053r01.tar.bz2
+
+Project files
+
+   libpng-1.0.53rc01-project-netware.zip
+   libpng-1.0.53rc01-project-wince.zip
 
 Other information:
 
-   1.6.0beta05-README.txt
-   1.6.0beta05-LICENSE.txt
+   libpng-1.0.53rc01-README.txt
+   libpng-1.0.53rc01-KNOWNBUGS.txt
+   libpng-1.0.53rc01-LICENSE.txt
+   libpng-1.0.53rc01-Y2K-compliance.txt
+   libpng-1.0.53rc01-[previous version]-diff.txt
 
-Changes since the last public release (1.5.7):
+Changes since the last public release (1.0.52):
 
-Version 1.6.0beta01 [December 15, 2011]
-  Removed machine-generated configure files from the GIT repository (they will
-    continue to appear in the tarball distributions).
-  Restored the new 'simplified' API, which was started in libpng-1.5.7beta02
-    but later deleted from libpng-1.5.7beta05.
-  Added example programs for the new 'simplified' API.
-  Added ANSI-C (C90) headers and require them, and take advantage of the
-    change. Also fixed some of the projects/* and contrib/* files that needed
-    updates for libpng16 and the move of pngvalid.c.
-    With this change the required ANSI-C header files are assumed to exist: the
-    implementation must provide float.h, limits.h, stdarg.h and stddef.h and
-    libpng relies on limits.h and stddef.h existing and behaving as defined
-    (the other two required headers aren't used).  Non-ANSI systems that don't
-    have stddef.h or limits.h will have to provide an appropriate fake
-    containing the relevant types and #defines.
-  The use of FAR/far has been eliminated and the definition of png_alloc_size_t
-    is now controlled by a flag so that 'small size_t' systems can select it
-    if necessary.  Libpng 1.6 may not currently work on such systems -- it
-    seems likely that it will ask 'malloc' for more than 65535 bytes with any
-    image that has a sufficiently large row size (rather than simply failing
-    to read such images).
-  New tools directory containing tools used to generate libpng code.
-  Fixed race conditions in parallel make builds. With higher degrees of
-    parallelism during 'make' the use of the same temporary file names such
-    as 'dfn*' can result in a race where a temporary file from one arm of the
-    build is deleted or overwritten in another arm.  This changes the
-    temporary files for suffix rules to always use $* and ensures that the
-    non-suffix rules use unique file names.
+version 1.2.43beta01 [January 27, 2010]
+  Updated CMakeLists.txt for consistent indentation and to avoid an
+    unclosed if-statement warning (Philip Lowman).
+  Removed "#ifdef PNG_1_0_X / #endif" surrounding
+    PNG_READ_16_TO_8_SUPPORTED and PNG_READ_GRAY_TO_RGB_SUPPORTED
+    in pngconf.h.  These were added in libpng-1.2.41beta08 and libpng-1.0.51,
+    which introduced a binary incompatibility with libpng-1.0.50.
+  Backported new png_decompress_chunk() algorithm from libpng-1.4.1
 
-Version 1.6.0beta02 [December 21, 2011]
-  Correct configure builds where build and source directories are separate.
-    The include path of 'config.h' was erroneously made relative in pngvalid.c
-    in libpng 1.5.7.
+version 1.2.43beta02 [February 1, 2010]
+  Backported two-pass png_decompress_chunk() algorithm from libpng-1.4.1
 
-Version 1.6.0beta03 [December 22, 2011]
-  Start-up code size improvements, error handler flexibility. These changes
-    alter how the tricky allocation of the initial png_struct and png_info
-    structures are handled. png_info is now handled in pretty much the same
-    way as everything else, except that the allocations handle NULL return
-    silently.  png_struct is changed in a similar way on allocation and on
-    deallocation a 'safety' error handler is put in place (which should never
-    be required).  The error handler itself is changed to permit mismatches
-    in the application and libpng error buffer size; however, this means a
-    silent change to the API to return the jmp_buf if the size doesn't match
-    the size from the libpng compilation; libpng now allocates the memory and
-    this may fail.  Overall these changes result in slight code size
-    reductions; however, this is a reduction in code that is always executed
-    so is particularly valuable.  Overall on a 64-bit system the libpng DLL
-    decreases in code size by 1733 bytes.  pngerror.o increases in size by
-    about 465 bytes because of the new functionality.
+version 1.2.43beta03 [February 6, 2010]
+  Backported fast png_push_save_buffer() algorithm from libpng-1.4.1
 
-Version 1.6.0beta04 [December 30, 2011]
-  Regenerated configure scripts with automake-1.11.2
-  Eliminated png_info_destroy(). It is now used only in png.c and only calls
-    one other internal function and memset().
-  Enabled png_get_sCAL_fixed() if floating point APIs are enabled. Previously
-    it was disabled whenever internal fixed point arithmetic was selected,
-    which meant it didn't exist even on systems where FP was available but not
-    preferred.
-  Added pngvalid.c compile time checks for const APIs.
-  Implemented 'restrict' for png_info and png_struct. Because of the way
-    libpng works both png_info and png_struct are always accessed via a
-    single pointer.  This means adding C99 'restrict' to the pointer gives
-    the compiler some opportunity to optimize the code.  This change allows
-    that.
-  Moved AC_MSG_CHECKING([if libraries can be versioned]) later to the proper
-    location in configure.ac (Gilles Espinasse).
-  Changed png_memcpy to C assignment where appropriate. Changed all those
-    uses of png_memcpy that were doing a simple assignment to assignments
-    (all those cases where the thing being copied is a non-array C L-value).
-  Added some error checking to png_set_*() routines.
-  Removed the reference to the non-exported function png_memcpy() from
-    example.c.
-  Fixed the Visual C 64-bit build - it requires jmp_buf to be aligned, but
-    it had become misaligned.
-  Revised contrib/pngminus/pnm2png.c to avoid warnings when png_uint_32
-    and unsigned long are of different sizes.
+version 1.2.43beta04 [February 8, 2010]
+  Reverted recent changes to png_push_save-buffer().
+  Removed PNGAPI declaration of png_calloc() and png_write_sig() in
+    1ibpng-1.2.X, introduced by mistake in libpng-1.2.41.
+  Return allocated "old_buffer" in png_push_save_buffer() before png_error(),
+    to avoid a potential memory leak.
 
-Version 1.6.0beta05 [February 3, 2012]
-  Updated manual with description of the simplified API (copied from png.h)
-  Fix bug in pngerror.c: some long warnings were being improperly truncated
-    (bug introduced in libpng-1.5.3beta05).
+version 1.2.43beta05 [February 8, 2010]
+  Ported rewritten png_decompress_chunk() by John Bowler from libpng-1.4.1.
+
+version 1.0.53rc01 and 1.2.43rc01 [February 18, 2010]
+  No changes.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
+
 (subscription required; visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
-to subscribe)
-or to glennrp at users.sourceforge.net
+to subscribe) or to glennrp at users.sourceforge.net
 
 Glenn R-P

CMakeLists.txt

@@ -1,376 +0,0 @@
-# CMakeLists.txt
-
-# Copyright (C) 2007-2011 Glenn Randers-Pehrson
-
-# This code is released under the libpng license.
-# For conditions of distribution and use, see the disclaimer
-# and license in png.h
-
-cmake_minimum_required(VERSION 2.4.4)
-set(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS true)
-
-if(UNIX AND NOT DEFINED CMAKE_BUILD_TYPE)
-  if(CMAKE_MAJOR_VERSION EQUAL 2 AND CMAKE_MINOR_VERSION EQUAL 4)
-    # workaround CMake 2.4.x bug
-    set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING
-        "Choose the type of build, options are:
-           None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used)
-           Debug
-           Release
-           RelWithDebInfo
-           MinSizeRel.")
-  else()
-    set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING
-        "Choose the type of build, options are:
-           None(CMAKE_CXX_FLAGS or CMAKE_C_FLAGS used)
-           Debug
-           Release
-           RelWithDebInfo
-           MinSizeRel.")
-  endif()
-endif()
-
-project(libpng C)
-enable_testing()
-
-set(PNGLIB_MAJOR 1)
-set(PNGLIB_MINOR 6)
-set(PNGLIB_RELEASE 0)
-set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
-set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
-
-# needed packages
-find_package(ZLIB REQUIRED)
-include_directories(${ZLIB_INCLUDE_DIR})
-
-if(NOT WIN32)
-  find_library(M_LIBRARY
-    NAMES m
-    PATHS /usr/lib /usr/local/lib
-  )
-  if(NOT M_LIBRARY)
-    message(STATUS
-      "math library 'libm' not found - floating point support disabled")
-  endif()
-else()
-  # not needed on windows
-  set(M_LIBRARY "")
-endif()
-
-# COMMAND LINE OPTIONS
-if(DEFINED PNG_SHARED)
-  option(PNG_SHARED "Build shared lib" ${PNG_SHARED})
-else()
-  option(PNG_SHARED "Build shared lib" ON)
-endif()
-if(DEFINED PNG_STATIC)
-  option(PNG_STATIC "Build static lib" ${PNG_STATIC})
-else()
-  option(PNG_STATIC "Build static lib" ON)
-endif()
-
-option(PNG_TESTS  "Build libpng tests" YES)
-
-# Many more configuration options could be added here
-option(PNG_DEBUG         "Build with debug output" NO)
-option(PNGARG            "Disable ANSI-C prototypes" NO)
-
-# SET LIBNAME
-set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR})
-
-# to distinguish between debug and release lib
-set(CMAKE_DEBUG_POSTFIX "d")
-
-# Use the prebuilt pnglibconf.h file from the scripts folder
-# TODO: fix this by building with awk; without this no cmake build can be
-# configured directly (to do so indirectly use your local awk to build a
-# pnglibconf.h in the build directory.)
-configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt
-               ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h)
-include_directories(${CMAKE_CURRENT_BINARY_DIR})
-
-# OUR SOURCES
-set(libpng_public_hdrs
-  png.h
-  pngconf.h
-  ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h
-)
-set(libpng_sources
-  ${libpng_public_hdrs}
-  pngdebug.h
-  pnginfo.h
-  pngpriv.h
-  pngstruct.h
-  png.c
-  pngerror.c
-  pngget.c
-  pngmem.c
-  pngpread.c
-  pngread.c
-  pngrio.c
-  pngrtran.c
-  pngrutil.c
-  pngset.c
-  pngtrans.c
-  pngwio.c
-  pngwrite.c
-  pngwtran.c
-  pngwutil.c
-)
-set(pngtest_sources
-  pngtest.c
-)
-set(pngvalid_sources
-  contrib/libtests/pngvalid.c
-)
-set(pngstest_sources
-  contrib/libtests/pngstest.c
-)
-# SOME NEEDED DEFINITIONS
-
-if(MSVC)
-  add_definitions(-D_CRT_SECURE_NO_DEPRECATE)
-endif(MSVC)
-
-if(PNG_DEBUG)
-  add_definitions(-DPNG_DEBUG)
-endif()
-
-# NOW BUILD OUR TARGET
-include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${ZLIB_INCLUDE_DIR})
-
-if(PNG_SHARED)
-  add_library(${PNG_LIB_NAME} SHARED ${libpng_sources})
-  if(MSVC)
-    # msvc does not append 'lib' - do it here to have consistent name
-    set_target_properties(${PNG_LIB_NAME} PROPERTIES PREFIX "lib")
-    set_target_properties(${PNG_LIB_NAME} PROPERTIES IMPORT_PREFIX "lib")
-  endif()
-  target_link_libraries(${PNG_LIB_NAME} ${ZLIB_LIBRARY} ${M_LIBRARY})
-endif()
-
-if(PNG_STATIC)
-# does not work without changing name
-  set(PNG_LIB_NAME_STATIC ${PNG_LIB_NAME}_static)
-  add_library(${PNG_LIB_NAME_STATIC} STATIC ${libpng_sources})
-  if(MSVC)
-    # msvc does not append 'lib' - do it here to have consistent name
-    set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES PREFIX "lib")
-  endif()
-  target_link_libraries(${PNG_LIB_NAME_STATIC} ${ZLIB_LIBRARY} ${M_LIBRARY})
-endif()
-
-if(PNG_SHARED AND WIN32)
-  set_target_properties(${PNG_LIB_NAME} PROPERTIES DEFINE_SYMBOL PNG_BUILD_DLL)
-endif()
-
-if(PNG_TESTS AND PNG_SHARED)
-  # does not work with msvc due to png_lib_ver issue
-  add_executable(pngtest ${pngtest_sources})
-  target_link_libraries(pngtest ${PNG_LIB_NAME})
-  add_test(pngtest ./pngtest ${CMAKE_CURRENT_SOURCE_DIR}/pngtest.png)
-  #
-  add_executable(pngvalid ${pngvalid_sources})
-  target_link_libraries(pngvalid ${PNG_LIB_NAME})
-  add_test(pngvalid ./pngvalid)
-  add_executable(pngstest ${pngstest_sources})
-  target_link_libraries(pngstest ${PNG_LIB_NAME})
-  add_test(pngstest ./pngstest
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g01.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g02.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g04.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn0g16.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn2c08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn2c16.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn3p01.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn3p02.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn3p04.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn3p08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn4a08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn4a16.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn6a08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/basn6a16.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn1g04.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn2c16.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbbn3p08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbgn2c16.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbgn3p08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbrn2c08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbwn1g16.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbwn3p08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftbyn3p08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftp0n1g08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftp0n2c08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftp0n3p08.png
-    ${CMAKE_CURRENT_SOURCE_DIR}/contrib/pngsuite/ftp1n3p08.png
-  )
-endif()
-
-# Ensure the CMAKE_LIBRARY_OUTPUT_DIRECTORY is set
-IF(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY)
-  IF(WIN32)
-    SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY "bin")
-  ELSE(WIN32)
-    SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY "lib")
-  ENDIF(WIN32)
-ENDIF(NOT CMAKE_LIBRARY_OUTPUT_DIRECTORY)
-
-# Set a variable with CMake code which:
-# Creates a symlink from src to dest (if possible) or alternatively
-# copies if different.
-macro(CREATE_SYMLINK SRC_FILE DEST_FILE)
-  FILE(REMOVE ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE})
-  if(WIN32 AND NOT CYGWIN AND NOT MINGW)
-    ADD_CUSTOM_COMMAND(
-        OUTPUT ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}   ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE}
-        COMMAND ${CMAKE_COMMAND} -E copy        ${CMAKE_CURRENT_BINARY_DIR}/${SRC_FILE} ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE}
-        COMMAND ${CMAKE_COMMAND} -E copy        ${CMAKE_CURRENT_BINARY_DIR}/${SRC_FILE} ${CMAKE_CURRENT_BINARY_DIR}/${DEST_FILE}
-        DEPENDS ${PNG_LIB_NAME} ${PNG_LIB_NAME_STATIC}
-        )
-    ADD_CUSTOM_TARGET(${DEST_FILE}_COPY ALL DEPENDS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE})
-  else(WIN32 AND NOT CYGWIN AND NOT MINGW)
-    execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ${SRC_FILE} ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
-    execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink ${SRC_FILE} ${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
-  endif(WIN32 AND NOT CYGWIN AND NOT MINGW)
-endmacro()
-
-# libpng is a library so default to 'lib'
-if(NOT DEFINED CMAKE_INSTALL_LIBDIR)
-  set(CMAKE_INSTALL_LIBDIR lib)
-endif(NOT DEFINED CMAKE_INSTALL_LIBDIR)
-
-# CREATE PKGCONFIG FILES
-# we use the same files like ./configure, so we have to set its vars
-# Only do this on Windows for Cygwin - the files don't make much sense outside
-# a UNIX look alike
-if(NOT WIN32 OR CYGWIN OR MINGW) 
-set(prefix      ${CMAKE_INSTALL_PREFIX})
-set(exec_prefix ${CMAKE_INSTALL_PREFIX})
-set(libdir      ${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR})
-set(includedir  ${CMAKE_INSTALL_PREFIX}/include)
-set(LIBS        "-lz -lm")
-configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng.pc.in
-  ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc @ONLY)
-CREATE_SYMLINK(${PNGLIB_NAME}.pc libpng.pc)
-
-configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpng-config.in
-  ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config @ONLY)
-CREATE_SYMLINK(${PNGLIB_NAME}-config libpng-config)
-endif(NOT WIN32 OR CYGWIN OR MINGW)
-
-# SET UP LINKS
-if(PNG_SHARED)
-  set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#   VERSION 16.${PNGLIB_RELEASE}.1.6.0beta05
-    VERSION 16.${PNGLIB_RELEASE}.0
-    SOVERSION 16
-    CLEAN_DIRECT_OUTPUT 1)
-endif()
-if(PNG_STATIC)
-  # MSVC doesn't use a different file extension for shared vs. static
-  # libs.  We are able to change OUTPUT_NAME to remove the _static
-  # for all other platforms.
-  if(NOT MSVC)
-    set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES
-      OUTPUT_NAME ${PNG_LIB_NAME}
-      CLEAN_DIRECT_OUTPUT 1)
-  endif()
-endif()
-
-# If CMake > 2.4.x, we set a variable used below to export
-# targets to an export file.
-# TODO: Use VERSION_GREATER after our cmake_minimum_required >= 2.6.2
-if(CMAKE_MAJOR_VERSION GREATER 1 AND CMAKE_MINOR_VERSION GREATER 4)
-  set(PNG_EXPORT_RULE EXPORT libpng)
-elseif(CMAKE_MAJOR_VERSION GREATER 2) # future proof
-  set(PNG_EXPORT_RULE EXPORT libpng)
-endif()
-
-# INSTALL
-if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
-  if(PNG_SHARED)
-    install(TARGETS ${PNG_LIB_NAME}
-        ${PNG_EXPORT_RULE}
-        RUNTIME DESTINATION bin
-        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
-
-    # Create a symlink for libpng.dll.a => libpng16.dll.a on Cygwin
-    if(CYGWIN OR MINGW)
-       get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} LOCATION_${CMAKE_BUILD_TYPE})
-       get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME)
-       CREATE_SYMLINK(${BUILD_TARGET_FILE} libpng${CMAKE_IMPORT_LIBRARY_SUFFIX})
-       install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_IMPORT_LIBRARY_SUFFIX}
-         DESTINATION ${CMAKE_INSTALL_LIBDIR})
-    endif(CYGWIN OR MINGW)
-
-    if(NOT WIN32)
-      get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME} LOCATION_${CMAKE_BUILD_TYPE})
-      get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME)
-      CREATE_SYMLINK(${BUILD_TARGET_FILE} libpng${CMAKE_SHARED_LIBRARY_SUFFIX})
-      install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_SHARED_LIBRARY_SUFFIX}
-         DESTINATION ${CMAKE_INSTALL_LIBDIR})
-    endif(NOT WIN32)
-  endif(PNG_SHARED)
-
-  if(PNG_STATIC)
-    install(TARGETS ${PNG_LIB_NAME_STATIC}
-        ${PNG_EXPORT_RULE}
-        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
-    if(NOT WIN32 OR CYGWIN OR MINGW)
-      get_target_property(BUILD_TARGET_LOCATION ${PNG_LIB_NAME_STATIC} LOCATION_${CMAKE_BUILD_TYPE})
-      get_filename_component(BUILD_TARGET_FILE ${BUILD_TARGET_LOCATION} NAME)
-      CREATE_SYMLINK(${BUILD_TARGET_FILE} libpng${CMAKE_STATIC_LIBRARY_SUFFIX})
-      install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng${CMAKE_STATIC_LIBRARY_SUFFIX}
-         DESTINATION ${CMAKE_INSTALL_LIBDIR})
-    endif(NOT WIN32 OR CYGWIN OR MINGW)
- endif()
-endif()
-
-if(NOT SKIP_INSTALL_HEADERS AND NOT SKIP_INSTALL_ALL )
-  install(FILES ${libpng_public_hdrs}   DESTINATION include)
-  install(FILES ${libpng_public_hdrs}   DESTINATION include/${PNGLIB_NAME})
-endif()
-if(NOT SKIP_INSTALL_EXECUTABLES AND NOT SKIP_INSTALL_ALL )
-  install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config DESTINATION bin)
-  install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config
-          DESTINATION bin)
-endif()
-if(NOT SKIP_INSTALL_FILES AND NOT SKIP_INSTALL_ALL )
-  # Install man pages
-  if(NOT PNG_MAN_DIR)
-    set(PNG_MAN_DIR "share/man")
-  endif()
-  install(FILES libpng.3 libpngpf.3      DESTINATION ${PNG_MAN_DIR}/man3)
-  install(FILES png.5                    DESTINATION ${PNG_MAN_DIR}/man5)
-  # Install pkg-config files
-  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpng.pc
-          DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
-  install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/libpng-config
-          DESTINATION bin)
-  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}.pc
-          DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
-  install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/${PNGLIB_NAME}-config
-          DESTINATION bin)
-endif()
-
-# On versions of CMake that support it, create an export file CMake
-# users can include() to import our targets
-if(PNG_EXPORT_RULE AND NOT SKIP_INSTALL_EXPORT AND NOT SKIP_INSTALL_ALL )
-  install(EXPORT libpng DESTINATION lib/libpng FILE lib${PNG_LIB_NAME}.cmake)
-endif()
-
-# what's with libpng-$VER%.txt and all the extra files?
-
-# UNINSTALL
-# do we need this?
-
-# DIST
-# do we need this?
-
-# to create msvc import lib for mingw compiled shared lib
-# pexports libpng.dll > libpng.def
-# lib /def:libpng.def /machine:x86
-

INSTALL

@@ -1,5 +1,5 @@
 
-Installing libpng
+Installing libpng version 1.0.53rc01 - February 18, 2010
 
 On Unix/Linux and similar systems, you can simply type
 
@@ -13,16 +13,10 @@ If configure does not work on your system and you have a reasonably
 up-to-date set of tools, running ./autogen.sh before running ./configure
 may fix the problem.  You can also run the individual commands in
 autogen.sh with the --force option, if supported by your version of
-the tools.  To be really sure that you aren't using any of the included
-pre-built scripts, you can do this:
-
-    ./configure --enable-maintainer-mode
-    make maintainer-clean
-    ./autogen.sh
-    ./configure [--prefix=/path] [other options]
-    make
-    make install
-    make check
+the tools.  If you run 'libtoolize --force', though, this will replace
+the distributed, patched, version of ltmain.sh with an unpatched version
+and your shared library builds may fail to produce libraries with the
+correct version numbers.
 
 Instead, you can use one of the custom-built makefiles in the
 "scripts" directory
@@ -52,8 +46,8 @@ to have access to the zlib.h and zconf.h include files that
 correspond to the version of zlib that's installed.
 
 You can rename the directories that you downloaded (they
-might be called "libpng-x.y.z" or "libpngNN" and "zlib-1.2.5"
-or "zlib125") so that you have directories called "zlib" and "libpng".
+might be called "libpng-1.0.53rc01" or "libpng10" and "zlib-1.2.3"
+or "zlib123") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
 
@@ -66,8 +60,8 @@ Your directory structure should look like this:
           CMakeLists.txt    =>  "cmake" script
           configuration files:
              configure.ac, configure, Makefile.am, Makefile.in,
-             autogen.sh, config.guess, ltmain.sh, missing, libpng.pc.in,
-             libpng-config.in, aclocal.m4, config.h.in, config.sub,
+             autogen.sh, config.guess, ltmain.sh, missing,
+             aclocal.m4, config.h.in, config.sub,
              depcomp, install-sh, mkinstalldirs, test-pngtest.sh
           contrib
              gregbook
@@ -76,12 +70,13 @@ Your directory structure should look like this:
              pngsuite
              visupng
           projects
+             cbuilder5 (Borland)
+             visualc6 (msvc)
              visualc71
-             vstudio
+             xcode
           scripts
              makefile.*
              *.def (module definition files)
-             etc.
           pngtest.png
           etc.
       zlib
@@ -112,7 +107,7 @@ scripts directory into this directory, for example
 Read the makefile to see if you need to change any source or
 target directories to match your preferences.
 
-Then read pnglibconf.dfa to see if you want to make any configuration
+Then read pngconf.h to see if you want to make any configuration
 changes.
 
 Then just run "make" which will create the libpng library in
@@ -130,26 +125,39 @@ do that, run "make install" in the zlib directory first if necessary).
 Some also allow you to run "make test-installed" after you have
 run "make install".
 
-Further information can be found in the README and libpng-manual.txt
+If you encounter a compiler error message complaining about the
+lines
+
+      __png.h__ already includes setjmp.h;
+      __dont__ include it again.;
+
+this means you have compiled another module that includes setjmp.h,
+which is hazardous because the two modules might not include exactly
+the same setjmp.h.  If you are sure that you know what you are doing
+and that they are exactly the same, then you can comment out or
+delete the two lines.  Better yet, use the cexcept interface
+instead, as demonstrated in contrib/visupng of the libpng distribution.
+
+Further information can be found in the README and libpng.txt
 files, in the individual makefiles, in png.h, and the manual pages
 libpng.3 and png.5.
 
+
 Using the ./configure script -- 16 December 2002.
 =================================================
 
+
 The ./configure script should work compatibly with what scripts/makefile.*
-did, however there are some options you might need to add to configure
-explicitly, which previously was done semi-automatically (if you didn't edit
+did, however there are some options you need to add to configure explicitly,
+which previously was done semi-automatically (if you didn't edit
 scripts/makefile.* yourself, that is)
 
+
 CFLAGS="-Wall -O -funroll-loops \
 -malign-loops=2 -malign-functions=2" ./configure --prefix=/usr/include \
 --with-pkgconfigdir=/usr/lib/pkgconfig --includedir=/usr/include
 
 You can alternatively specify --includedir=/usr/include, /usr/local/include,
-/usr/include/libpng%NN%, or whatever.
+/usr/include/png12, or whatever.
 
-If you find that the configure script is out-of-date or is not supporting
-your platform properly, try running autogen.sh to regenerate "configure",
-"Makefile.in", and the other configuration files. Then try configure again.
 

KNOWNBUG

@@ -0,0 +1,29 @@
+
+Known bugs in libpng version 1.0.53rc01
+
+1. December 4, 2009: The PNG_NO_ERROR_NUMBERS macro was inadvertently
+   defined in libpng-1.2.41/pngconf.h, which may cause a problem with
+   building a binary-compatible library.
+
+   STATUS: This will be fixed in libpng-1.2.42.  In the meantime, simply
+   delete the definition from line :
+
+2. February 23, 2006: The custom makefiles don't build libpng with -lz.
+
+   STATUS: This is a subject of debate. The change will probably be made
+   as a part of a major overhaul of the makefiles in libpng version 1.4.0.
+
+3. February 24, 2006: The Makefile generated by the "configure" script
+   fails to install symbolic links
+   libpng12.so => libpng12.so.0.1.2.9betaN
+   that are generated by the custom makefiles.
+
+4. September 4, 2007:  There is a report that pngtest crashes on MacOS 10.
+
+   STATUS: workarounds are
+      1) Compile without optimization (crashes are observed with
+         -arch i386 and -O2 or -O3, using gcc-4.0.1).
+      2) Compile pngtest.c with PNG_DEBUG defined (the bug goes away if
+         you try to look at it).
+      3) Ignore the crash.  The library itself seems to be OK.
+

LICENSE

@@ -10,8 +10,8 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.6.0beta05, February 3, 2012, are
-Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
+libpng versions 1.2.6, August 15, 2004, through 1.0.53rc01, February 18, 2010, are
+Copyright (c) 2004, 2006-2009 Glenn Randers-Pehrson, and are
 distributed according to the same disclaimer and license as libpng-1.2.5
 with the following individual added to the list of Contributing Authors
 
@@ -108,4 +108,4 @@ certification mark of the Open Source Initiative.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-February 3, 2012
+February 18, 2010

Makefile.am

@@ -1,251 +1,138 @@
 # Makefile.am:
 #   Source file for Makefile.in (and hence Makefile)
 #
+# Makefile.am need only be changed on a major version number
+# change (e.g. libpng12 --> libpng14).  In that case seach
+# this file for every instance of the old base name (libpng12)
+# and change to the new one (libpng14), then change the
+# -version-number settings below so that the new values have
+# the correct major part (first field).
 
 PNGLIB_BASENAME= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@
 
-ACLOCAL_AMFLAGS = -I scripts
+# libpng does not follow GNU file name conventions
+AUTOMAKE_OPTIONS = foreign
 
 # test programs - run on make check, make distcheck
-TESTS_ENVIRONMENT= srcdir=$(srcdir)
 check_PROGRAMS= pngtest
 pngtest_SOURCES = pngtest.c
-pngtest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la
+pngtest_LDADD = libpng10.la
 TESTS = test-pngtest.sh
-
-# Only do the following if the contrib directory is present.
-check_PROGRAMS+= pngvalid pngstest
-pngvalid_SOURCES = contrib/libtests/pngvalid.c
-pngstest_SOURCES = contrib/libtests/pngstest.c
-pngvalid_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la
-pngstest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la
-TESTS += test-pngvalid-simple.sh test-pngvalid-full.sh test-pngstest.sh
+TESTS_ENVIRONMENT= srcdir=$(srcdir)
 
 # man pages
 dist_man_MANS= libpng.3 libpngpf.3 png.5
 
 # generate the -config scripts if required
-binconfigs= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config
-EXTRA_SCRIPTS= libpng-config libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config
+binconfigs= libpng10-config
+EXTRA_SCRIPTS= libpng-config libpng10-config
 bin_SCRIPTS= @binconfigs@
 
 # rules to build libpng, only build the old library on request
-lib_LTLIBRARIES=libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la
-# EXTRA_LTLIBRARIES= libpng.la
-libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = png.c pngerror.c\
-	pngget.c pngmem.c pngpread.c pngread.c pngrio.c pngrtran.c pngrutil.c\
-	pngset.c pngtrans.c pngwio.c pngwrite.c pngwtran.c pngwutil.c\
-	png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h
+lib_LTLIBRARIES=libpng10.la @compatlib@
+EXTRA_LTLIBRARIES= libpng.la
+libpng10_la_SOURCES = png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
+	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
+	pngwtran.c pngmem.c pngerror.c pngpread.c \
+	png.h pngconf.h
+libpng_la_SOURCES = $(libpng10_la_SOURCES)
 
-if PNG_ARM_NEON
-libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += arm/filter_neon.S
-endif
+libpng_la_CPPFLAGS = @LIBPNG_DEFINES@
+libpng10_la_CPPFLAGS = @LIBPNG_DEFINES@
 
-nodist_libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = pnglibconf.h
-
-libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS = -no-undefined -export-dynamic \
-	-version-number @PNGLIB_MAJOR@@PNGLIB_MINOR@:@PNGLIB_RELEASE@:0
+# MAJOR UPGRADE: the version-number settings below must be changed.
+libpng10_la_LDFLAGS = -no-undefined -export-dynamic \
+	-version-number 0:@PNGLIB_RELEASE@:0
+# -rpath is needed as automake doesn't know the directory
+libpng_la_LDFLAGS = -rpath '$(libdir)' -no-undefined -export-dynamic \
+	-version-number 2:@PNGLIB_RELEASE@:0
 
 if HAVE_LD_VERSION_SCRIPT
-#   Versioned symbols and restricted exports
-if HAVE_SOLARIS_LD
-  libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -Wl,-M -Wl,libpng.vers
+  # Versioned symbols and restricted exports
+  libpng10_la_LDFLAGS += -Wl,--version-script=libpng.vers
+  libpng10_la_DEPENDENCIES = libpng.vers
 else
-  libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -Wl,--version-script=libpng.vers
+  # Only restricted exports when possible
+  libpng10_la_LDFLAGS += -export-symbols libpng.sym
+  libpng10_la_DEPENDENCIES = libpng.sym
 endif
+libpng_la_DEPENDENCIES = $(libpng10_la_DEPENDENCIES)
 
-  libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_DEPENDENCIES = libpng.vers
-else
-#   Only restricted exports when possible
-  libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS += -export-symbols libpng.sym
-  libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_DEPENDENCIES = libpng.sym
-endif
+# Avoid depending upon Character Ranges.
+AN = '_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789'
 
 #distribute headers in /usr/include/libpng/*
 pkgincludedir= $(includedir)/$(PNGLIB_BASENAME)
 pkginclude_HEADERS= png.h pngconf.h
-nodist_pkginclude_HEADERS= pnglibconf.h
 
 # pkg-config stuff, note that libpng.pc is always required in order
 # to get the correct library
 pkgconfigdir = @pkgconfigdir@
-pkgconfig_DATA = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc
+pkgconfig_DATA = libpng10.pc
 
 #extra source distribution files.
 EXTRA_DIST= \
-	ANNOUNCE CHANGES INSTALL LICENSE README TODO \
+	ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO \
 	pngtest.png pngbar.png pngnow.png pngbar.jpg autogen.sh \
-	${srcdir}/contrib ${srcdir}/projects ${srcdir}/scripts \
+	${srcdir}/projects/cbuilder5/* \
+	${srcdir}/projects/beos/* \
+	${srcdir}/projects/visualc6/* \
+	${srcdir}/projects/visualc71/* \
+	${srcdir}/projects/wince.txt \
+	${srcdir}/projects/netware.txt \
+	${srcdir}/scripts/* \
+	${srcdir}/contrib/gregbook/* \
+	${srcdir}/contrib/pngminus/* \
+	${srcdir}/contrib/pngsuite/* \
+	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	CMakeLists.txt example.c libpng-manual.txt
+	example.c libpng-1.0.53rc01.txt pngvcrd.c
 
-SCRIPT_CLEANFILES=scripts/*.out scripts/*.chk scripts/pnglibconf.dfn
-
-CLEANFILES= *.tf? pngout.png libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc \
-	libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config libpng.vers libpng.sym \
-	check.new pnglibconf.* pngprefix.h symbols.new pngtest-log.txt \
-	$(SCRIPT_CLEANFILES)
+CLEANFILES= pngout.png libpng10.pc libpng10-config libpng.vers \
+libpng.sym
 
 MAINTAINERCLEANFILES = Makefile.in aclocal.m4 config.guess config.h.in \
 config.sub configure depcomp install-sh ltmain.sh missing
 
-# PNG_COPTS give extra options for the C compiler to be used on all compilation
-# steps (unless targe_CFLAGS is specified; that will take precedence over
-# AM_CFLAGS)
-PNG_COPTS = @PNG_COPTS@
-AM_CFLAGS = ${PNG_COPTS}
-
-# DFNCPP is normally just CPP - the C preprocessor - but on Solaris and maybe
-# other operating systems (NeXT?) the C preprocessor selected by configure
-# checks input tokens for validity - effectively it performs part of the ANSI-C
-# parsing - and therefore fails with the .df files.  configure.ac has special
-# checks for this and sets DFNCPP appropriately.
-DFNCPP = @DFNCPP@
-
-SUFFIXES = .chk .dfn .out
-
 $(PNGLIB_BASENAME).pc: libpng.pc
 	cp libpng.pc $@
 
 $(PNGLIB_BASENAME)-config: libpng-config
 	cp libpng-config $@
 
-scripts/sym.out scripts/vers.out: png.h pngconf.h pnglibconf.h
-scripts/prefix.out: png.h pngconf.h pnglibconf.out
-scripts/symbols.out: png.h pngconf.h $(srcdir)/scripts/pnglibconf.h.prebuilt
+libpng.sym: png.h pngconf.h
+	rm -f $@ $@.new
+	$(CPP) @LIBPNG_DEFINES@ $(CPPFLAGS) -DPNG_BUILDSYMS $(srcdir)/png.h | \
+		$(SED) -n -e \
+		's|^.*PNG_FUNCTION_EXPORT[ 	]*\([$(AN)]*\).*$$|$(SYMBOL_PREFIX)\1|p' \
+		-e 's|^.*PNG_DATA_EXPORT[ 	]*\([$(AN)]*\).*$$|$(SYMBOL_PREFIX)\1|p' \
+			>$@.new
+	mv $@.new $@
 
-libpng.sym: scripts/sym.out
-	rm -f $@
-	cp $? $@
-libpng.vers: scripts/vers.out
-	rm -f $@
-	cp $? $@
+libpng.vers: libpng.sym
+	rm -f $@ $@.new
+	echo PNG@PNGLIB_MAJOR@@PNGLIB_MINOR@_0 '{global:' > $@.new
+	$(SED) s/$$/\;/ libpng.sym >> $@.new
+	echo 'local: *; };' >> $@.new
+	mv $@.new $@
 
-if DO_PNG_PREFIX
-# Rename functions in scripts/prefix.out with a PNG_PREFIX prefix.
-# Rename macros in scripts/macro.lst from PNG_PREFIXpng_ to PNG_ (the actual
-# implementation of the macro).
-pnglibconf.h: pnglibconf.out scripts/prefix.out scripts/macro.lst
-	rm -f $@
-	$(AWK) 's==0 && NR>1{print prev}\
-	   s==0{prev=$$0}\
-	   s==1{print "#define", $$1, "@PNG_PREFIX@" $$1}\
-	   s==2{print "#define @PNG_PREFIX@png_" $$1, "PNG_" $$1}\
-	   END{print prev}' s=0 pnglibconf.out s=1 scripts/prefix.out\
-	   s=2 ${srcdir}/scripts/macro.lst >pnglibconf.tf8
-	mv pnglibconf.tf8 $@
-
-pngprefix.h: scripts/intprefix.out
-	rm -f pngprefix.tf1
-	$(AWK) '{print "#define", $$1, "@PNG_PREFIX@" $$1}' $? >pngprefix.tf1
-	mv pngprefix.tf1 $@
-else
-pnglibconf.h: pnglibconf.out
-	rm -f $@
-	cp $? $@
-
-pngprefix.h: # is empty
-	:>$@
-endif
-
-$(srcdir)/scripts/pnglibconf.h.prebuilt:
-	@echo "Attempting to build $@" >&2
-	@echo "This is a machine generated file, but if you want to make" >&2
-	@echo "a new one simply make 'scripts/pnglibconf.out' and copy that" >&2
-	@exit 1
-
-# The following is necessary to ensure that the local pnglibconf.h is used, not
-# an installed one (this can happen immediately after on a clean system if
-# 'make test' is the first thing the user does.)
-contrib/libtests/pngstest.o contrib/libtests/pngvalid.o pngtest.o: pnglibconf.h
-
-# We must use -DPNG_NO_USE_READ_MACROS here even when the library may actually
-# be built with PNG_USE_READ_MACROS; this prevents the read macros from
-# interfering with the symbol file format.
-SYMBOL_CFLAGS = -DPNGLIB_LIBNAME='PNG@PNGLIB_MAJOR@@PNGLIB_MINOR@_0'\
-		-DPNGLIB_VERSION='@PNGLIB_VERSION@'\
-		-DSYMBOL_PREFIX='$(SYMBOL_PREFIX)'\
-		-DPNG_NO_USE_READ_MACROS -DPNG_BUILDING_SYMBOL_TABLE
-
-if DO_PNG_PREFIX
-SYMBOL_CFLAGS += -DPNG_PREFIX='@PNG_PREFIX@'
-endif
-
-.dfn.out:
-	rm -f $@ $*.c $*.tf[123]
-	test -d scripts || mkdir scripts
-	echo '#include "$<"' >$*.c
-	$(DFNCPP) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES)\
-	    $(CPPFLAGS) $(SYMBOL_CFLAGS) $*.c > $*.tf1
-	$(SED) -n -e 's|^.*PNG_DEFN_MAGIC *-\(.*\)- *PNG_DEFN_END.*$$|\1|p'\
-	    $*.tf1 >$*.tf2
-	$(SED) -e 's| *PNG_JOIN *||g' -e 's| *$$||' $*.tf2 >$*.tf3
-	rm -f $*.c $*.tf[12]
-	mv $*.tf3 $@
-
-# The .dfn file for pnglibconf.h is machine generated
-pnglibconf.dfn: scripts/pnglibconf.dfa scripts/options.awk pngconf.h
-	rm -f $@ $*.tf[45]
-	$(AWK) -f ${srcdir}/scripts/options.awk out=$*.tf4 version=search\
-	    ${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\
-	    $(DFA_XTRA) 1>&2
-	$(AWK) -f ${srcdir}/scripts/options.awk out=$*.tf5 $*.tf4 1>&2
-	rm $*.tf4
-	mv $*.tf5 $@
-
-# Symbol checks (.def and .out files should match)
-scripts/symbols.chk: scripts/checksym.awk scripts/symbols.def scripts/symbols.out
-
-.out.chk:
-	rm -f $@ $*.new
-	$(AWK) -f ${srcdir}/scripts/checksym.awk ${srcdir}/scripts/${*F}.def\
-	    of="$*.new" $< >&2
-	mv $*.new $@
-
-# used on demand to regenerate the standard header, CPPFLAGS should
-# be empty - no non-standard defines
-scripts/pnglibconf.dfn: scripts/pnglibconf.dfa scripts/options.awk pngconf.h
-	rm -f $@ pnglibconf.tf[67]
-	test -z "$(CPPFLAGS)"
-	echo "com @PNGLIB_VERSION@ STANDARD API DEFINITION" |\
-	$(AWK) -f ${srcdir}/scripts/options.awk out=pnglibconf.tf6\
-	    logunsupported=1 version=search ${srcdir}/pngconf.h -\
-	    ${srcdir}/scripts/pnglibconf.dfa 1>&2
-	$(AWK) -f ${srcdir}/scripts/options.awk out=pnglibconf.tf7\
-	    pnglibconf.tf6 1>&2
-	rm pnglibconf.tf6
-	mv pnglibconf.tf7 $@
-
-$(libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_OBJECTS): png.h pngconf.h \
-	pnglibconf.h pngpriv.h pngdebug.h pnginfo.h pngstruct.h pngprefix.h
-
-test: check-am
-
-# Extra checks
-check: scripts/symbols.chk
-
-# Don't distribute the generated script files
-dist-hook:
-	cd '$(top_distdir)'; rm -f $(SCRIPT_CLEANFILES)
+test: check
 
 # install the .../include headers as links to the new ones
 install-data-hook:
-	cd $(DESTDIR)$(includedir); rm -f png.h pngconf.h pnglibconf.h
+	cd $(DESTDIR)$(includedir); rm -f png.h pngconf.h
 	cd $(DESTDIR)$(includedir); $(LN_S) $(PNGLIB_BASENAME)/png.h png.h
-	cd $(DESTDIR)$(includedir); $(LN_S) $(PNGLIB_BASENAME)/pngconf.h \
-		pngconf.h
-	cd $(DESTDIR)$(includedir); $(LN_S) $(PNGLIB_BASENAME)/pnglibconf.h \
-		pnglibconf.h
+	cd $(DESTDIR)$(includedir); $(LN_S) $(PNGLIB_BASENAME)/pngconf.h pngconf.h
 	cd $(DESTDIR)$(pkgconfigdir); rm -f libpng.pc
 	cd $(DESTDIR)$(pkgconfigdir); $(LN_S) $(PNGLIB_BASENAME).pc libpng.pc
 
-# do evil things to libpng to cause libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ to be used
+# do evil things to libpng to cause libpng10 to be used
 install-exec-hook:
 	cd $(DESTDIR)$(bindir); rm -f libpng-config
 	cd $(DESTDIR)$(bindir); $(LN_S) $(PNGLIB_BASENAME)-config libpng-config
 	@set -x;\
 	cd $(DESTDIR)$(libdir);\
-	for ext in a la so so.@PNGLIB_MAJOR@@PNGLIB_MINOR@.@PNGLIB_RELEASE@ sl dylib dll.a; do\
+	for ext in a la so sl dylib; do\
 		rm -f libpng.$$ext;\
                 if test -f $(PNGLIB_BASENAME).$$ext; then\
                        $(LN_S) $(PNGLIB_BASENAME).$$ext libpng.$$ext;\
@@ -253,9 +140,13 @@ install-exec-hook:
 	done
 
 uninstall-hook:
-	cd $(DESTDIR)$(includedir); rm -f png.h pngconf.h pnglibconf.h
+	cd $(DESTDIR)$(includedir); rm -f png.h pngconf.h
 	rm -f $(DESTDIR)$(pkgconfigdir)/libpng.pc
 	rm -f $(DESTDIR)$(bindir)/libpng-config
-	rm -f $(DESTDIR)$(libdir)/libpng.a
-	rm -f $(DESTDIR)$(libdir)/libpng.la
-	rm -f $(DESTDIR)$(libdir)/libpng.dll.a
+	@if test -n "@compatlib@"; then\
+		set -x;\
+		cd $(DESTDIR)$(libdir);\
+		for ext in a la so sl dylib; do\
+			rm -f libpng.$$ext;\
+		done;\
+	fi

README

@@ -1,11 +1,15 @@
-README for libpng version 1.6.0beta05 - February 3, 2012 (shared library 16.0)
+README for libpng version 1.0.53rc01 - February 18, 2010 (shared library 10.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
 
 Libpng comes in several distribution formats.  Get libpng-*.tar.gz,
-libpng-*.tar.xz or libpng-*.tar.bz2 if you want UNIX-style line endings
-in the text files, or lpng*.zip if you want DOS-style line endings.
+libpng-*.tar.xz, or libpng-*.tar.bz2 if you want UNIX-style line
+endings in the text files, or lpng*.7z or lpng*.zip if you want DOS-style
+line endings.  You can get UNIX-style line endings from the *.zip file
+by using "unzip -a" but there seems to be no simple way to recover
+UNIX-style line endings from the *.7z file.  The *.tar.xz file is
+recommended for *NIX users instead.
 
 Version 0.89 was the first official release of libpng.  Don't let the
 fact that it's the first release fool you.  The libpng library has been in
@@ -54,11 +58,11 @@ to set different actions based on whether the CRC error occurred in a
 critical or an ancillary chunk.
 
 The changes made to the library, and bugs fixed are based on discussions
-on the PNG-implement mailing list and not on material submitted
+on the png-mng-implement mailing list and not on material submitted
 privately to Guy, Andreas, or Glenn.  They will forward any good
 suggestions to the list.
 
-For a detailed description on using libpng, read libpng-manual.txt.  For
+For a detailed description on using libpng, read libpng.txt.  For
 examples of libpng in a program, see example.c and pngtest.c.  For usage
 information and restrictions (what little they are) on libpng, see
 png.h.  For a description on using zlib (the compression library used by
@@ -77,12 +81,12 @@ compression library that is useful for more things than just PNG files.
 You can use zlib as a drop-in replacement for fread() and fwrite() if
 you are so inclined.
 
-zlib should be available at the same place that libpng is, or at.
-ftp://ftp.info-zip.org/pub/infozip/zlib
+zlib should be available at the same place that libpng is, or at
+ftp://ftp.simplesystems.org/pub/png/src/
 
 You may also want a copy of the PNG specification.  It is available
 as an RFC, a W3C Recommendation, and an ISO/IEC Standard.  You can find
-these at http://www.libpng.org/pub/png/documents/
+these at http://www.libpng.org/pub/png/pngdocs.html
 
 This code is currently being archived at libpng.sf.net in the
 [DOWNLOAD] area, and on CompuServe, Lib 20 (PNG SUPPORT)
@@ -104,26 +108,28 @@ This release was created and will be supported by myself (of course
 based in a large way on Guy's and Andreas' earlier work), and the PNG
 development group.
 
-Send comments/corrections/commendations to png-mng-implement at
-lists.sourceforge.net (subscription required; visit 
+Send comments/corrections/commendations to png-mng-implement at lists.sf.net
+(subscription required; visit 
 https://lists.sourceforge.net/lists/listinfo/png-mng-implement
 to subscribe) or to glennrp at users.sourceforge.net
 
 You can't reach Guy, the original libpng author, at the addresses
 given in previous versions of this document.  He and Andreas will
-read mail addressed to the png-implement list, however.
+read mail addressed to the png-mng-implement list, however.
 
 Please do not send general questions about PNG.  Send them to
-png-mng-misc at lists.sf.net (subscription required; visit
+the (png-mng-misc at lists.sourceforge.net, subscription required, visit
 https://lists.sourceforge.net/lists/listinfo/png-mng-misc to
-subscribe).  If you have a question about something
+subscribe). On the other hand, please do not send libpng questions to
+that address, send them to me or to the png-mng-implement list.  I'll
+get them in the end anyway.  If you have a question about something
 in the PNG specification that is related to using libpng, send it
 to me.  Send me any questions that start with "I was using libpng,
 and ...".  If in doubt, send questions to me.  I'll bounce them
 to others, if necessary.
 
 Please do not send suggestions on how to change PNG.  We have
-been discussing PNG for sixteen years now, and it is official and
+been discussing PNG for twelve years now, and it is official and
 finished.  If you have suggestions for libpng, however, I'll
 gladly listen.  Even if your suggestion is not used immediately,
 it may be used later.
@@ -138,17 +144,14 @@ Files in this distribution:
       TODO          =>  Things not implemented in the current library
       Y2KINFO       =>  Statement of Y2K compliance
       example.c     =>  Example code for using libpng functions
-      libpng.3      =>  manual page for libpng (includes libpng-manual.txt)
-      libpng-manual.txt  =>  Description of libpng and its functions
+      libpng-*-*-diff.txt => Diff from previous release
+      libpng.3      =>  manual page for libpng (includes libpng.txt)
+      libpng.txt    =>  Description of libpng and its functions
       libpngpf.3    =>  manual page for libpng's private functions
       png.5         =>  manual page for the PNG format
       png.c         =>  Basic interface functions common to library
-      png.h         =>  Library function and interface declarations (public)
-      pngpriv.h     =>  Library function and interface declarations (private)
-      pngconf.h     =>  System specific library configuration (public)
-      pngstruct.h   =>  png_struct declaration (private)
-      pnginfo.h     =>  png_info struct declaration (private)
-      pngdebug.h    =>  debugging macros (private)
+      png.h         =>  Library function and interface declarations
+      pngconf.h     =>  System specific library configuration
       pngerror.c    =>  Error/warning message I/O functions
       pngget.c      =>  Functions for retrieving info from struct
       pngmem.c      =>  Memory handling functions
@@ -172,21 +175,91 @@ Files in this distribution:
                             Greg Roelofs' "PNG: The Definitive Guide",
                             O'Reilly, 1999
        msvctest     =>  Builds and runs pngtest using a MSVC workspace
+       pngminim     =>  Simple pnm2pngm and png2pnmm programs
        pngminus     =>  Simple pnm2png and png2pnm programs
        pngsuite     =>  Test images
        visupng      =>  Contains a MSVC workspace for VisualPng
       projects      =>  Contains project files and workspaces for
                         building a DLL
-       cbuilder5        =>  Contains a Borland workspace for building
+       beos             =>  Contains a Beos workspace for building libpng
+       c5builder        =>  Contains a Borland workspace for building
                             libpng and zlib
+       netware.txt      =>  Contains instructions for downloading a set
+                            of project files for building libpng and
+                            zlib on Netware.
        visualc6         =>  Contains a Microsoft Visual C++ (MSVC)
                             workspace for building libpng and zlib
-       visualc71        =>  Contains a Microsoft Visual C++ (MSVC)
-                            workspace for building libpng and zlib
-       xcode            =>  Contains an Apple xcode
-                            workspace for building libpng and zlib
+       wince.txt        =>  Contains instructions for downloading a
+                            Microsoft Visual C++ (Windows CD Toolkit)
+                            workspace for building libpng and zlib on
+                            WindowsCE
+       xcode            =>  Contains xcode project files
       scripts       =>  Directory containing scripts for building libpng:
-                            (see scripts/README.txt for the list of scripts)
+       descrip.mms      =>  VMS makefile for MMS or MMK
+       makefile.std     =>  Generic UNIX makefile (cc, creates static
+                            libpng.a)
+       makefile.elf     =>  Linux/ELF gcc makefile symbol versioning,
+                            creates libpng10.so.0.1.0.53rc01)
+       makefile.linux   =>  Linux/ELF makefile (gcc, creates
+                            libpng10.so.0.1.0.53rc01)
+       makefile.gcmmx   =>  Linux/ELF makefile (gcc, creates
+                            libpng10.so.0.1.0.53rc01, previously
+                            used assembler code tuned for Intel MMX
+                            platform)
+       makefile.gcc     =>  Generic makefile (gcc, creates static
+                            libpng.a)
+       makefile.knr     =>  Archaic UNIX Makefile that converts files
+                            with ansi2knr (Requires ansi2knr.c from
+                            ftp://ftp.cs.wisc.edu/ghost)
+       makefile.aix     =>  AIX makefile
+       makefile.cygwin  =>  Cygwin/gcc makefile
+       makefile.darwin  =>  Darwin makefile
+       makefile.dec     =>  DEC Alpha UNIX makefile
+       makefile.freebsd =>  FreeBSD makefile
+       makefile.hpgcc   =>  HPUX makefile using gcc
+       makefile.hpux    =>  HPUX (10.20 and 11.00) makefile
+       makefile.hp64    =>  HPUX (10.20 and 11.00) makefile, 64 bit
+       makefile.ibmc    =>  IBM C/C++ version 3.x for Win32 and OS/2
+                            (static)
+       makefile.intel   =>  Intel C/C++ version 4.0 and later
+       libpng.icc       =>  Project file, IBM VisualAge/C++ 4.0 or later
+       makefile.netbsd  =>  NetBSD/cc makefile, makes libpng.so.
+       makefile.ne10bsd  =>  NetBSD/cc makefile, makes libpng10.so
+       makefile.openbsd =>  OpenBSD makefile
+       makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
+       makefile.sggcc   =>  Silicon Graphics
+                            (gcc, creates libpng10.so.0.1.0.53rc01)
+       makefile.sunos   =>  Sun makefile
+       makefile.solaris =>  Solaris 2.X makefile
+                            (gcc, creates libpng10.so.0.1.0.53rc01)
+       makefile.so9     =>  Solaris 9 makefile
+                            (gcc, creates libpng10.so.0.1.0.53rc01)
+       makefile.32sunu  =>  Sun Ultra 32-bit makefile
+       makefile.64sunu  =>  Sun Ultra 64-bit makefile
+       makefile.sco     =>  For SCO OSr5  ELF and Unixware 7 with Native cc
+       makefile.mips    =>  MIPS makefile
+       makefile.acorn   =>  Acorn makefile
+       makefile.amiga   =>  Amiga makefile
+       smakefile.ppc    =>  AMIGA smakefile for SAS C V6.58/7.00 PPC
+                            compiler (Requires SCOPTIONS, copied from
+                            scripts/SCOPTIONS.ppc)
+       makefile.atari   =>  Atari makefile
+       makefile.beos    =>  BEOS makefile for X86
+       makefile.bor     =>  Borland makefile (uses bcc)
+       makefile.bc32    =>  32-bit Borland C++ (all modules compiled in C mode)
+       makefile.tc3     =>  Turbo C 3.0 makefile
+       makefile.dj2     =>  DJGPP 2 makefile
+       makefile.msc     =>  Microsoft C makefile
+       makefile.vcawin32=>  makefile for Microsoft Visual C++ 5.0 and
+                            later (previously used assembler code tuned
+                            for Intel MMX platform)
+       makefile.vcwin32 =>  makefile for Microsoft Visual C++ 4.0 and
+                            later (does not use assembler code)
+       makefile.os2     =>  OS/2 Makefile (gcc and emx, requires pngos2.def)
+       pngos2.def       =>  OS/2 module definition file used by makefile.os2
+       makefile.watcom  =>  Watcom 10a+ Makefile, 32-bit flat memory model
+       makevms.com      =>  VMS build script
+       SCOPTIONS.ppc    =>  Used with smakefile.ppc
 
 Good luck, and happy coding.
 
@@ -195,7 +268,7 @@ Good luck, and happy coding.
 
 -Andreas Eric Dilger (former maintainer, 1996-1997)
  Internet: adilger at enel.ucalgary.ca
- Web: http://www-mddsp.enel.ucalgary.ca/People/adilger/
+ Web: http://members.shaw.ca/adilger/
 
 -Guy Eric Schalnat (original author and former maintainer, 1995-1996)
  (formerly of Group 42, Inc)

TODO

@@ -1,11 +1,12 @@
-/*
 TODO - list of things to do for libpng:
 
 Final bug fixes.
+Improve API by hiding the png_struct and png_info structs.
+Finish work on the no-floating-point version (including gamma compensation)
 Better C++ wrapper/full C++ implementation?
 Fix problem with C++ and EXTERN "C".
 cHRM transformation.
-Remove setjmp/longjmp usage in favor of returning error codes.
+Improve setjmp/longjmp usage or remove it in favor of returning error codes.
 Add "grayscale->palette" transformation and "palette->grayscale" detection.
 Improved dithering.
 Multi-lingual error and warning message support.
@@ -16,12 +17,9 @@ Better filter selection
    (counting huffman bits/precompression?  filter inertia?  filter costs?).
 Histogram creation.
 Text conversion between different code pages (Latin-1 -> Mac and DOS).
-Avoid building gamma tables whenever possible.
+Should we always malloc 2^bit_depth PLTE/tRNS/hIST entries for safety?
+Build gamma tables using fixed point (and do away with floating point entirely).
 Use greater precision when changing to linear gamma for compositing against
   background and doing rgb-to-gray transformation.
 Investigate pre-incremented loop counters and other loop constructions.
 Add interpolated method of handling interlacing.
-Switch to the simpler zlib (zlib/libpng) license if legally possible.
-Extend pngvalid.c to validate more of the libpng transformations.
-
-*/

Y2KINFO

@@ -0,0 +1,55 @@
+   Y2K compliance in libpng:
+   =========================
+
+      February 18, 2010
+
+      Since the PNG Development group is an ad-hoc body, we can't make
+      an official declaration.
+
+      This is your unofficial assurance that libpng from version 0.71 and
+      upward through 1.0.53rc01 are Y2K compliant.  It is my belief that earlier
+      versions were also Y2K compliant.
+
+      Libpng only has three year fields.  One is a 2-byte unsigned integer
+      that will hold years up to 65535.  The other two hold the date in text
+      format, and will hold years up to 9999.
+
+      The integer is
+          "png_uint_16 year" in png_time_struct.
+
+      The strings are
+          "png_charp time_buffer" in png_struct and
+          "near_time_buffer", which is a local character string in png.c.
+
+      There are seven time-related functions:
+
+          png_convert_to_rfc_1123() in png.c
+            (formerly png_convert_to_rfc_1152() in error)
+          png_convert_from_struct_tm() in pngwrite.c, called in pngwrite.c
+          png_convert_from_time_t() in pngwrite.c
+          png_get_tIME() in pngget.c
+          png_handle_tIME() in pngrutil.c, called in pngread.c
+          png_set_tIME() in pngset.c
+          png_write_tIME() in pngwutil.c, called in pngwrite.c
+
+      All appear to handle dates properly in a Y2K environment.  The
+      png_convert_from_time_t() function calls gmtime() to convert from system
+      clock time, which returns (year - 1900), which we properly convert to
+      the full 4-digit year.  There is a possibility that applications using
+      libpng are not passing 4-digit years into the png_convert_to_rfc_1123()
+      function, or that they are incorrectly passing only a 2-digit year
+      instead of "year - 1900" into the png_convert_from_struct_tm() function,
+      but this is not under our control.  The libpng documentation has always
+      stated that it works with 4-digit years, and the APIs have been
+      documented as such.
+
+      The tIME chunk itself is also Y2K compliant.  It uses a 2-byte unsigned
+      integer to hold the year, and can hold years as large as 65535.
+
+      zlib, upon which libpng depends, is also Y2K compliant.  It contains
+      no date-related code.
+
+
+         Glenn Randers-Pehrson
+         libpng maintainer
+         PNG Development Group

arm/filter_neon.S

@@ -1,225 +0,0 @@
-
-/* filter_neon.S - NEON optimised filter functions
- *
- * Copyright (c) 2011 Glenn Randers-Pehrson
- * Written by Mans Rullgard, 2011.
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
-#if defined(__linux__) && defined(__ELF__)
-.section .note.GNU-stack,"",%progbits /* mark stack as non-executable */
-#endif
-
-#ifdef __ELF__
-#   define ELF
-#else
-#   define ELF @
-#endif
-
-        .arch armv7-a
-        .fpu  neon
-
-.macro  func    name, export=0
-    .macro endfunc
-ELF     .size   \name, . - \name
-        .endfunc
-        .purgem endfunc
-    .endm
-        .text
-    .if \export
-        .global \name
-    .endif
-ELF     .type   \name, STT_FUNC
-        .func   \name
-\name:
-.endm
-
-func    png_read_filter_row_sub4_neon, export=1
-        ldr             r3,  [r0, #4]           @ rowbytes
-        vmov.i8         d3,  #0
-1:
-        vld4.32         {d4[],d5[],d6[],d7[]},    [r1,:128]
-        vadd.u8         d0,  d3,  d4
-        vadd.u8         d1,  d0,  d5
-        vadd.u8         d2,  d1,  d6
-        vadd.u8         d3,  d2,  d7
-        vst4.32         {d0[0],d1[0],d2[0],d3[0]},[r1,:128]!
-        subs            r3,  r3,  #16
-        bgt             1b
-
-        bx              lr
-endfunc
-
-func    png_read_filter_row_sub3_neon, export=1
-        ldr             r3,  [r0, #4]           @ rowbytes
-        vmov.i8         d3,  #0
-        mov             r0,  r1
-        mov             r2,  #3
-        mov             r12, #12
-        vld1.8          {q11},    [r0], r12
-1:
-        vext.8          d5,  d22, d23, #3
-        vadd.u8         d0,  d3,  d22
-        vext.8          d6,  d22, d23, #6
-        vadd.u8         d1,  d0,  d5
-        vext.8          d7,  d23, d23, #1
-        vld1.8          {q11},    [r0], r12
-        vst1.32         {d0[0]},  [r1,:32], r2
-        vadd.u8         d2,  d1,  d6
-        vst1.32         {d1[0]},  [r1], r2
-        vadd.u8         d3,  d2,  d7
-        vst1.32         {d2[0]},  [r1], r2
-        vst1.32         {d3[0]},  [r1], r2
-        subs            r3,  r3,  #12
-        bgt             1b
-
-        bx              lr
-endfunc
-
-func    png_read_filter_row_up_neon, export=1
-        ldr             r3,  [r0, #4]           @ rowbytes
-1:
-        vld1.8          {q0}, [r1,:128]
-        vld1.8          {q1}, [r2,:128]!
-        vadd.u8         q0,  q0,  q1
-        vst1.8          {q0}, [r1,:128]!
-        subs            r3,  r3,  #16
-        bgt             1b
-
-        bx              lr
-endfunc
-
-func    png_read_filter_row_avg4_neon, export=1
-        ldr             r12, [r0, #4]           @ rowbytes
-        vmov.i8         d3,  #0
-1:
-        vld4.32         {d4[],d5[],d6[],d7[]},    [r1,:128]
-        vld4.32         {d16[],d17[],d18[],d19[]},[r2,:128]!
-        vhadd.u8        d0,  d3,  d16
-        vadd.u8         d0,  d0,  d4
-        vhadd.u8        d1,  d0,  d17
-        vadd.u8         d1,  d1,  d5
-        vhadd.u8        d2,  d1,  d18
-        vadd.u8         d2,  d2,  d6
-        vhadd.u8        d3,  d2,  d19
-        vadd.u8         d3,  d3,  d7
-        vst4.32         {d0[0],d1[0],d2[0],d3[0]},[r1,:128]!
-        subs            r12, r12, #16
-        bgt             1b
-
-        bx              lr
-endfunc
-
-func    png_read_filter_row_avg3_neon, export=1
-        push            {r4,lr}
-        ldr             r12, [r0, #4]           @ rowbytes
-        vmov.i8         d3,  #0
-        mov             r0,  r1
-        mov             r4,  #3
-        mov             lr,  #12
-        vld1.8          {q11},    [r0], lr
-1:
-        vld1.8          {q10},    [r2], lr
-        vext.8          d5,  d22, d23, #3
-        vhadd.u8        d0,  d3,  d20
-        vext.8          d17, d20, d21, #3
-        vadd.u8         d0,  d0,  d22
-        vext.8          d6,  d22, d23, #6
-        vhadd.u8        d1,  d0,  d17
-        vext.8          d18, d20, d21, #6
-        vadd.u8         d1,  d1,  d5
-        vext.8          d7,  d23, d23, #1
-        vld1.8          {q11},    [r0], lr
-        vst1.32         {d0[0]},  [r1,:32], r4
-        vhadd.u8        d2,  d1,  d18
-        vst1.32         {d1[0]},  [r1], r4
-        vext.8          d19, d21, d21, #1
-        vadd.u8         d2,  d2,  d6
-        vhadd.u8        d3,  d2,  d19
-        vst1.32         {d2[0]},  [r1], r4
-        vadd.u8         d3,  d3,  d7
-        vst1.32         {d3[0]},  [r1], r4
-        subs            r12, r12, #12
-        bgt             1b
-
-        pop             {r4,pc}
-endfunc
-
-.macro  paeth           rx,  ra,  rb,  rc
-        vaddl.u8        q12, \ra, \rb           @ a + b
-        vaddl.u8        q15, \rc, \rc           @ 2*c
-        vabdl.u8        q13, \rb, \rc           @ pa
-        vabdl.u8        q14, \ra, \rc           @ pb
-        vabd.u16        q15, q12, q15           @ pc
-        vcle.u16        q12, q13, q14           @ pa <= pb
-        vcle.u16        q13, q13, q15           @ pa <= pc
-        vcle.u16        q14, q14, q15           @ pb <= pc
-        vand            q12, q12, q13           @ pa <= pb && pa <= pc
-        vmovn.u16       d28, q14
-        vmovn.u16       \rx, q12
-        vbsl            d28, \rb, \rc
-        vbsl            \rx, \ra, d28
-.endm
-
-func    png_read_filter_row_paeth4_neon, export=1
-        ldr             r12, [r0, #4]           @ rowbytes
-        vmov.i8         d3,  #0
-        vmov.i8         d20, #0
-1:
-        vld4.32         {d4[],d5[],d6[],d7[]},    [r1,:128]
-        vld4.32         {d16[],d17[],d18[],d19[]},[r2,:128]!
-        paeth           d0,  d3,  d16, d20
-        vadd.u8         d0,  d0,  d4
-        paeth           d1,  d0,  d17, d16
-        vadd.u8         d1,  d1,  d5
-        paeth           d2,  d1,  d18, d17
-        vadd.u8         d2,  d2,  d6
-        paeth           d3,  d2,  d19, d18
-        vmov            d20, d19
-        vadd.u8         d3,  d3,  d7
-        vst4.32         {d0[0],d1[0],d2[0],d3[0]},[r1,:128]!
-        subs            r12, r12, #16
-        bgt             1b
-
-        bx              lr
-endfunc
-
-func    png_read_filter_row_paeth3_neon, export=1
-        push            {r4,lr}
-        ldr             r12, [r0, #4]           @ rowbytes
-        vmov.i8         d3,  #0
-        vmov.i8         d4,  #0
-        mov             r0,  r1
-        mov             r4,  #3
-        mov             lr,  #12
-        vld1.8          {q11},    [r0], lr
-1:
-        vld1.8          {q10},    [r2], lr
-        paeth           d0,  d3,  d20, d4
-        vext.8          d5,  d22, d23, #3
-        vadd.u8         d0,  d0,  d22
-        vext.8          d17, d20, d21, #3
-        paeth           d1,  d0,  d17, d20
-        vst1.32         {d0[0]},  [r1,:32], r4
-        vext.8          d6,  d22, d23, #6
-        vadd.u8         d1,  d1,  d5
-        vext.8          d18, d20, d21, #6
-        paeth           d2,  d1,  d18, d17
-        vext.8          d7,  d23, d23, #1
-        vld1.8          {q11},    [r0], lr
-        vst1.32         {d1[0]},  [r1], r4
-        vadd.u8         d2,  d2,  d6
-        vext.8          d19, d21, d21, #1
-        paeth           d3,  d2,  d19, d18
-        vst1.32         {d2[0]},  [r1], r4
-        vmov            d4,  d19
-        vadd.u8         d3,  d3,  d7
-        vst1.32         {d3[0]},  [r1], r4
-        subs            r12, r12, #12
-        bgt             1b
-
-        pop             {r4,pc}
-endfunc

autogen.sh

@@ -1,219 +1,25 @@
 #! /bin/sh
+# a quick hack script to generate necessary files from 
+# auto* tools.
 #
-# Run 'autoreconf' to build 'configure', 'Makefile.in' and other configure
-# control files.
-#
-# The first time this is run on a GIT checkout the only files that exist are
-# configure.ac and Makefile.am; all of the autotools support scripts are
-# missing.  They are instantiated with autoreconf --force --install.
-#
-# For regular ("tarball") distributions all the files should exist.  We do not
-# want them to be updated *under any circumstances*.  It should never be
-# necessary to rune autogen.sh because ./configure --enable-maintainer-mode says
-# what to do if Makeile.am or configure.ac are changed.
-#
-# It is *probably* OK to update the files on a GIT checkout, because they have
-# come from the local tools, but leave that to the user who is assumed to know
-# whether it is ok or required.
-#
-# This script is intended to work without arguments, there are, however, hidden
-# arguments for (a) use while testing the script and (b) to fix up systems that
-# have been broken.  If (b) is required the script prompts for the correct
-# options.  For this reason the options are *NOT* documented in the help; this
-# is deliberate; UTSL.
-#
-clean=
-maintainer=
-while test $# -gt 0
-do
-   case "$1" in
-      --maintainer)
-         maintainer=1;;
-
-      --clean)
-         clean=1;;
-
-      *)
-         exec >&2
-         echo "$0: usage: ./autogen.sh"
-         if test -d .git
-         then
-            echo "  ./autogen.sh generates the configure script and"
-            echo "  Makefile.in, or refreshes them after changes to Makefile.am"
-            echo "  or configure.ac.  You may prefer to just run autoreconf."
-         elif test -z "$maintainer"
-         then
-            echo "  DO NOT RUN THIS SCRIPT."
-            echo "  If you need to change Makefile.am or configure.ac then you"
-            echo "  also need to run ./configure --enable-maintainer-mode and"
-            echo "  use the appropriate autotools, *NOT* this script, to update"
-            echo "  everything, please check the documentation of autoreconf."
-            echo "  WARNING: libpng is intentionally generated with a known,"
-            echo "  fixed, set of autotools.  It is known *NOT* to work with"
-            echo "  the collection of autotools distributed on highly reputable"
-            echo "  operating systems."
-            echo "  Remember: autotools is GNU software, you are expected to"
-            echo "  pay for support."
-         else
-            echo "  You have run autogen.sh with --maintainer enabled and you"
-            echo "  are not using a GIT distribution, then you have given an"
-            echo "  unrecognized argument.  This is not good. --maintainer"
-            echo "  switches off any assumptions that you might not know what"
-            echo "  you are doing."
-         fi
-         exit 1;;
-   esac
-
-   shift
-done
-#
-# First check for a set of the autotools files; if absent then this is assumed
-# to be a GIT version and the local autotools must be used.  If present this
-# is a tarball distribution and the script should not be used.  If partially
-# present bad things are happening.
-#
-# The autotools generated files:
-libpng_autotools_files="Makefile.in aclocal.m4 config.guess config.h.in\
-   config.sub configure depcomp install-sh ltmain.sh missing"
-#
-# These are separate because 'maintainer-clean' does not remove them.
-libpng_libtool_files="scripts/libtool.m4 scripts/ltoptions.m4\
-   scripts/ltsugar.m4 scripts/ltversion.m4 scripts/lt~obsolete.m4"
-
-libpng_autotools_dirs="autom4te.cache" # not required
-#
-# The configure generated files:
-libpng_configure_files="Makefile config.h config.log config.status\
-   libpng-config libpng.pc libtool stamp-h1"
-
-libpng_configure_dirs=".deps"
-#
-# We must remove the configure generated files as well as the autotools
-# generated files if autotools are regenerated because otherwise if configure
-# has been run without "--enable-maintainer-mode" make can do a partial update
-# of Makefile.  These functions do the two bits of cleaning.
-clean_autotools(){
-   rm -rf $libpng_autotools_files $libpng_libtool_files $libpng_autotools_dirs
-}
-
-clean_configure(){
-   rm -rf $libpng_configure_files $libpng_configure_dirs
-}
-#
-# Clean: remove everything (this is to help with testing)
-if test -n "$clean"
-then
-   clean_configure
-   if test -n "$maintainer"
-   then
-      clean_autotools
-   fi
-
-   exit 0
-fi
-#
-# Validate the distribution.
-libpng_autotools_file_found=
-libpng_autotools_file_missing=
-for file in $libpng_autotools_files
-do
-   if test -f  "$file"
-   then
-      libpng_autotools_file_found=1
-   else
-      libpng_autotools_file_missing=1
-   fi
-done
-#
-# Presence of one of these does not *invalidate* missing, but absence
-# invalidates found.
-for file in $libpng_libtool_files
-do
-   if test ! -f "$file"
-   then
-      libpng_autotools_file_missing=1
-   fi
-done
-# 
-# The cache directory doesn't matter - it will be regenerated and does not exist
-# anyway in a tarball.
-#
-# Either everything is missing or everything is there, the --maintainer option
-# just changes this so that the mode is set to generate all the files.
-mode=
-if test -z "$libpng_autotools_file_found" -o -n "$maintainer"
-then
-   mode="autoreconf"
-else
-   if test -n "$libpng_autotools_file_missing"
-   then
-      mode="broken"
-   else
-      mode="configure"
-   fi
-fi
-#
-# So:
-case "$mode" in
-   autoreconf)
-      # Clean in case configure files exist
-      clean_configure
-      clean_autotools
-      # Everything must be initialized, so use --force
-      if autoreconf --warnings=all --force --install
-      then
-         missing=
-         for file in $libpng_autotools_files
-         do
-            test -f "$file" || missing=1
-         done
-         # ignore the cache directory
-         test -z "$missing" || {
-            exec >&2
-            echo "autoreconf was run, but did not produce all the expected"
-            echo "files.  It is likely that your autotools installation is"
-            echo "not compatible with that expected by libpng."
-            exit 1
-         }
-      else
-         exec >&2
-         echo "autoreconf failed: your version of autotools is incompatible"
-         echo "with this libpng version.  Please use a distributed archive"
-         echo "(which includes the autotools generated files) and run configure"
-         echo "instead."
-         exit 1
-      fi;;
-
-   configure)
-      if test -d .git
-      then
-         exec >&2
-         echo "ERROR: running autoreconf on an initialized sytem"
-         echo "  This is not necessary; it is only necessary to remake the"
-         echo "  autotools generated files if Makefile.am or configure.ac"
-         echo "  change and make does the right thing with:"
-         echo
-         echo "     ./configure --enable-maintainer-mode."
-         echo
-         echo "  You can run autoreconf yourself if you don't like maintainer"
-         echo "  mode and you can also just run autoreconf -f -i to initialize"
-         echo "  everything in the first place; this script is only for"
-         echo "  compatiblity with prior releases."
-         exit 1
-      else
-         exec >&2
-         echo "autogen.sh is intended only to generate 'configure' on systems"
-         echo "that do not have it.  You have a complete 'configure', if you"
-         echo "need to change Makefile.am or configure.ac you also need to"
-         echo "run configure with the --enable-maintainer-mode option."
-         exit 1
-      fi;;
-
-   broken)
-      exec >&2
-      echo "Your system has a partial set of autotools generated files."
-      echo "autogen.sh is unable to proceed.  The full set of files is"
-      echo "contained in the distribution archive and you do not need to run"
-      echo "autogen.sh if you use it."
-      exit 1;;
-esac
+# WARNING: if you run this you will change the versions
+# of the tools which are used and, maybe, required!
+        touch Makefile.am configure.ac
+{
+	echo "running libtoolize" >&2
+	libtoolize --force --copy --automake
+} && {
+	echo "running aclocal" >&2
+	aclocal
+} && {
+	echo "running autoheader [ignore the warnings]" >&2
+	autoheader
+} && {
+	echo "running automake" >&2
+	automake --force-missing --foreign -a -c
+} && {
+	echo "running autoconf" >&2
+	autoconf
+} &&
+	echo "autogen complete" >&2 ||
+	echo "ERROR: autogen.sh failed, autogen is incomplete" >&2

config.h.in

@@ -0,0 +1,86 @@
+/* config.h.in.  Generated from configure.ac by autoheader.  */
+
+/* Define to 1 if you have the <dlfcn.h> header file. */
+#undef HAVE_DLFCN_H
+
+/* Define to 1 if you have the <inttypes.h> header file. */
+#undef HAVE_INTTYPES_H
+
+/* Define to 1 if you have the `m' library (-lm). */
+#undef HAVE_LIBM
+
+/* Define to 1 if you have the `z' library (-lz). */
+#undef HAVE_LIBZ
+
+/* Define to 1 if you have the <malloc.h> header file. */
+#undef HAVE_MALLOC_H
+
+/* Define to 1 if you have the <memory.h> header file. */
+#undef HAVE_MEMORY_H
+
+/* Define to 1 if you have the `memset' function. */
+#undef HAVE_MEMSET
+
+/* Define to 1 if you have the `pow' function. */
+#undef HAVE_POW
+
+/* Define to 1 if you have the <stdint.h> header file. */
+#undef HAVE_STDINT_H
+
+/* Define to 1 if you have the <stdlib.h> header file. */
+#undef HAVE_STDLIB_H
+
+/* Define to 1 if you have the <strings.h> header file. */
+#undef HAVE_STRINGS_H
+
+/* Define to 1 if you have the <string.h> header file. */
+#undef HAVE_STRING_H
+
+/* Define to 1 if you have the <sys/stat.h> header file. */
+#undef HAVE_SYS_STAT_H
+
+/* Define to 1 if you have the <sys/types.h> header file. */
+#undef HAVE_SYS_TYPES_H
+
+/* Define to 1 if you have the <unistd.h> header file. */
+#undef HAVE_UNISTD_H
+
+/* Define to the sub-directory in which libtool stores uninstalled libraries.
+   */
+#undef LT_OBJDIR
+
+/* Name of package */
+#undef PACKAGE
+
+/* Define to the address where bug reports for this package should be sent. */
+#undef PACKAGE_BUGREPORT
+
+/* Define to the full name of this package. */
+#undef PACKAGE_NAME
+
+/* Define to the full name and version of this package. */
+#undef PACKAGE_STRING
+
+/* Define to the one symbol short name of this package. */
+#undef PACKAGE_TARNAME
+
+/* Define to the home page for this package. */
+#undef PACKAGE_URL
+
+/* Define to the version of this package. */
+#undef PACKAGE_VERSION
+
+/* Define to 1 if you have the ANSI C header files. */
+#undef STDC_HEADERS
+
+/* Define to 1 if your <sys/time.h> declares `struct tm'. */
+#undef TM_IN_SYS_TIME
+
+/* Version number of package */
+#undef VERSION
+
+/* Define to empty if `const' does not conform to ANSI C. */
+#undef const
+
+/* Define to `unsigned int' if <sys/types.h> does not define. */
+#undef size_t

configure.ac

@@ -14,104 +14,35 @@ dnl Makefile.am to upgrade the package name.
 dnl This is here to prevent earlier autoconf from being used, it
 dnl should not be necessary to regenerate configure if the time
 dnl stamps are correct
-AC_PREREQ([2.68])
+AC_PREREQ(2.59)
 
 dnl Version number stuff here:
 
-AC_INIT([libpng],[1.6.0beta05],[png-mng-implement@lists.sourceforge.net])
-AC_CONFIG_MACRO_DIR([scripts])
-
-# libpng does not follow GNU file name conventions (hence 'foreign')
-# color-tests requires automake 1.11 or later
-# silent-rules requires automake 1.11 or later
-# dist-xz requires automake 1.11 or later
-# 1.11.1 fixes a security issue in 1.11
-AM_INIT_AUTOMAKE([1.11.1 foreign dist-xz dist-bzip2 color-tests silent-rules])
-# was:
-# AM_INIT_AUTOMAKE
+AC_INIT([libpng], [1.0.53rc01], [png-mng-implement@lists.sourceforge.net])
+AM_INIT_AUTOMAKE
+dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
-dnl configure.ac and Makefile.am expect automake 1.11.2 or a compatible later
-dnl version; aclocal.m4 will generate a failure if you use a prior version of
-dnl automake, so the following is not necessary (and is not defined anyway):
-dnl AM_PREREQ([1.11.2])
-dnl stop configure from automagically running automake
-
-PNGLIB_VERSION=1.6.0beta05
+PNGLIB_VERSION=1.0.53rc01
 PNGLIB_MAJOR=1
-PNGLIB_MINOR=6
-PNGLIB_RELEASE=0
+PNGLIB_MINOR=0
+PNGLIB_RELEASE=53
 
 dnl End of version number stuff
 
 AC_CONFIG_SRCDIR([pngget.c])
-AC_CONFIG_HEADERS([config.h])
+AM_CONFIG_HEADER(config.h)
 
 # Checks for programs.
-AC_LANG([C])
 AC_PROG_CC
-AM_PROG_AS
-LT_PATH_LD
+AC_PROG_LD
 AC_PROG_CPP
 AC_CHECK_TOOL(SED, sed, :)
-AC_CHECK_TOOL(AWK, awk, :)
+AC_LIBTOOL_WIN32_DLL
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_MAKE_SET
-
-dnl libtool/libtoolize; version 2.4.2 is the tested version, this or any
-dnl compatible later version may be used
-LT_INIT([win32-dll])
-LT_PREREQ([2.4.2])
-
-# On Solaris 10 and 12 CPP gets set to cc -E, however this still
-# does some input parsing.  We need strict ANSI-C style tokenization,
-# check this:
-AC_REQUIRE_CPP
-AC_MSG_CHECKING([for a C preprocessor that does not parse its input])
-AC_PREPROC_IFELSE([AC_LANG_SOURCE([[1.1.1 16BIT]])],
-   [DFNCPP="$CPP"],
-   [  DFNCPP=""
-      sav_CPP="$CPP"
-      for CPP in "${CC-cc} -E" "${CC-cc} -E -traditional-cpp" "/lib/cpp" "cpp"
-      do
-         AC_PREPROC_IFELSE([AC_LANG_SOURCE([[1.1.1 16BIT]])],
-            [DFNCPP="$CPP"]
-            [break],,)
-      done
-      CPP="$sav_CPP"
-   ])
-if test -n "$DFNCPP"; then
-   AC_MSG_RESULT([$DFNCPP])
-   AC_SUBST(DFNCPP)
-else
-   AC_MSG_FAILURE([not found], 1)
-fi
-
-# -Werror cannot be passed to GCC in CFLAGS because configure will fail (it
-# checks the compiler with a program that generates a warning), add the
-# following option to deal with this
-AC_ARG_VAR(PNG_COPTS,
-   [additional flags for the C compiler, use this for options that would]
-   [cause configure itself to fail])
-AC_ARG_ENABLE(werror,
-   AS_HELP_STRING([[[--enable-werror[=OPT]]]],
-      [Pass -Werror or the given argument to the compiler if it is supported]),
-   [test "$enable_werror" = "yes" && enable_werror="-Werror"
-    if test "$enable_werror" != "no"; then
-      sav_CFLAGS="$CFLAGS"
-      CFLAGS="$enable_werror $CFLAGS"
-      AC_MSG_CHECKING([if the compiler allows $enable_werror])
-      AC_COMPILE_IFELSE(
-         [AC_LANG_SOURCE([
-            [int main(int argc, char **argv){]
-            [return argv[argc-1][0];]
-            [}]])],
-         AC_MSG_RESULT(yes)
-         PNG_COPTS="$PNG_COPTS $enable_werror",
-         AC_MSG_RESULT(no))
-      CFLAGS="$sav_CFLAGS"
-    fi],)
+AC_PROG_LIBTOOL
 
 # Checks for header files.
 AC_HEADER_STDC
@@ -121,54 +52,29 @@ AC_CHECK_HEADERS([malloc.h stdlib.h string.h strings.h])
 AC_C_CONST
 AC_TYPE_SIZE_T
 AC_STRUCT_TM
-AC_C_RESTRICT
 
 # Checks for library functions.
 AC_FUNC_STRTOD
-AC_CHECK_FUNCS([memset], , AC_MSG_ERROR(memset not found in libc))
-AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_MSG_ERROR(cannot find pow)) )
-AC_ARG_WITH(zlib-prefix,
-   AS_HELP_STRING([[[--with-zlib-prefix]]],
-      [prefix that may have been used in installed zlib]),
-      [ZPREFIX=${withval}],
-      [ZPREFIX='z_'])
-AC_CHECK_LIB(z, zlibVersion, ,
-    AC_CHECK_LIB(z, ${ZPREFIX}zlibVersion, , AC_MSG_ERROR(zlib not installed)))
+AC_CHECK_FUNCS([memset], , AC_ERROR([memset not found in libc]))
+AC_CHECK_FUNCS([pow], , AC_CHECK_LIB(m, pow, , AC_ERROR([cannot find pow])) )
+AC_CHECK_LIB(z, zlibVersion, , AC_ERROR([zlib not installed]))
 
-# The following is for pngvalid, to ensure it catches FP errors even on
-# platforms that don't enable FP exceptions, the function appears in the math
-# library (typically), it's not an error if it is not found.
-AC_CHECK_LIB([m], [feenableexcept])
-AC_CHECK_FUNCS([feenableexcept])
-
-AC_MSG_CHECKING([if using Solaris linker])
-SLD=`$LD --version 2>&1 | grep Solaris`
-if test "$SLD"; then
-    have_solaris_ld=yes
-    AC_MSG_RESULT(yes)
-else
-    have_solaris_ld=no
-    AC_MSG_RESULT(no)
-fi
-AM_CONDITIONAL(HAVE_SOLARIS_LD, test "$have_solaris_ld" = "yes")
+LIBPNG_DEFINES=-DPNG_CONFIGURE_LIBPNG
+AC_MSG_CHECKING(
+  [if assembler code in pnggccrd.c can be compiled without PNG_NO_MMX_CODE])
+AC_TRY_COMPILE(
+  [#include "$srcdir/pnggccrd.c"],
+  [return 0;],
+  AC_MSG_RESULT(yes)
+  LIBPNG_NO_MMX="",
+  AC_MSG_RESULT(no)
+  LIBPNG_NO_MMX=-DPNG_NO_MMX_CODE)
+LIBPNG_DEFINES=$LIBPNG_DEFINES\ $LIBPNG_NO_MMX
+AC_SUBST(LIBPNG_DEFINES)
+AC_SUBST(LIBPNG_NO_MMX)
 
 AC_MSG_CHECKING([if libraries can be versioned])
-# Special case for PE/COFF platforms: ld reports
-# support for version-script, but doesn't actually
-# DO anything with it.
-case $host in
-*cygwin* | *mingw32* | *interix* )
-    have_ld_version_script=no
-    AC_MSG_RESULT(no)
-;;
-* )
-
-if test "$have_solaris_ld" = "yes"; then
-    GLD=`$LD --help < /dev/null 2>&1 | grep 'M mapfile'`
-else
-    GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script`
-fi
-
+GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script`
 if test "$GLD"; then
     have_ld_version_script=yes
     AC_MSG_RESULT(yes)
@@ -177,9 +83,6 @@ else
     AC_MSG_RESULT(no)
     AC_MSG_WARN(*** You have not enabled versioned symbols.)
 fi
-;;
-esac
-
 AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")
 
 if test "$have_ld_version_script" = "yes"; then
@@ -201,56 +104,45 @@ AC_SUBST(PNGLIB_RELEASE)
 # Additional arguments (and substitutions)
 # Allow the pkg-config directory to be set
 AC_ARG_WITH(pkgconfigdir,
-   AS_HELP_STRING([[[--with-pkgconfigdir]]],
-      [Use the specified pkgconfig dir (default is libdir/pkgconfig)]),
-   [pkgconfigdir=${withval}],
-   [pkgconfigdir='${libdir}/pkgconfig'])
+	AC_HELP_STRING([--with-pkgconfigdir],
+	[Use the specified pkgconfig dir (default is libdir/pkgconfig)]),
+	[pkgconfigdir=${withval}],
+	[pkgconfigdir='${libdir}/pkgconfig'])
 
 AC_SUBST([pkgconfigdir])
-AC_MSG_NOTICE([[pkgconfig directory is ${pkgconfigdir}]])
+AC_MSG_NOTICE([pkgconfig directory is ${pkgconfigdir}])
 
 # Make the *-config binary config scripts optional
 AC_ARG_WITH(binconfigs,
-   AS_HELP_STRING([[[--with-binconfigs]]],
-      [Generate shell libpng-config scripts as well as pkg-config data]
-      [@<:@default=yes@:>@]),
-   [if test "${withval}" = no; then
-      binconfigs=
-      AC_MSG_NOTICE([[libpng-config scripts will not be built]])
-    else
-      binconfigs='${binconfigs}'
-    fi],
-   [binconfigs='${binconfigs}'])
+	AC_HELP_STRING([--with-binconfigs],
+		[Generate shell libpng-config scripts as well as pkg-config data]
+		[@<:@default=yes@:>@]),
+	[if test "${withval}" = no; then
+		binconfigs=
+		AC_MSG_NOTICE([libpng-config scripts will not be built])
+	else
+		binconfigs='${binconfigs}'
+	fi],
+	[binconfigs='${binconfigs}'])
 AC_SUBST([binconfigs])
 
-# Support for prefixes to the API function names; this will generate defines
-# at the start of the build to rename exported library functions
-AC_ARG_WITH(libpng-prefix,
-   AS_HELP_STRING([[[--with-libpng-prefix]]],
-      [prefix libpng exported function (API) names with the given value]),
-   [if test "${withval:-no}" != "no"; then
-      AC_SUBST([PNG_PREFIX], [${withval}])
-    fi])
-AM_CONDITIONAL([DO_PNG_PREFIX], [test "${with_libpng_prefix:-no}" != "no"])
-
-# Because GCC by default assembles code with an executable stack, even though it
-# compiles C code with a non-executable stack, it is necessary to do a fixup
-# here (this may by GCC specific)
-AC_SUBST([AM_CCASFLAGS], [-Wa,--noexecstack])
-
-AC_ARG_ENABLE([arm-neon],
-   AS_HELP_STRING([[[--enable-arm-neon]]], [Enable ARM NEON optimizations]),
-   [if test "${enableval}" = "yes"; then
-      AC_DEFINE([PNG_ARM_NEON], [1], [Enable ARM NEON optimizations])
-      AC_DEFINE([PNG_ALIGNED_MEMORY_SUPPORTED], [1], [Align row buffers])
-    fi])
-AM_CONDITIONAL([PNG_ARM_NEON], [test "${enable_arm_neon:-no}" = yes])
-
-AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]])
+# Allow the old version number library, libpng.so, to be removed from
+# the build
+AC_ARG_WITH(libpng-compat,
+	AC_HELP_STRING([--with-libpng-compat],
+		[Generate the obsolete libpng.so library @<:@default=yes@:>@]),
+	[if test "${withval}" = no; then
+		compatlib=
+		AC_MSG_NOTICE([libpng.so will not be built])
+	else
+		compatlib=libpng.la
+	fi],
+	[compatlib=libpng.la])
+AC_SUBST([compatlib])
 
 # Config files, substituting as above
-AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in])
-AC_CONFIG_FILES([libpng-config:libpng-config.in],
-   [chmod +x libpng-config])
+AC_CONFIG_FILES([Makefile libpng.pc:scripts/libpng.pc-configure.in])
+AC_CONFIG_FILES([libpng-config:scripts/libpng-config.in],
+		[chmod +x libpng-config])
 
 AC_OUTPUT

contrib/README.txt

@@ -1,4 +0,0 @@
-
-This "contrib" directory contains contributions which are not necessarily under
-the libpng license, although all are open source.  They are not part of
-libpng proper and are not used for building the library.

contrib/examples/README.txt

@@ -1,24 +0,0 @@
-
-This directory (contrib/examples) contains examples of libpng usage.
-
-NO COPYRIGHT RIGHTS ARE CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY.
-
-To the extent possible under law, the authors have waived all copyright and
-related or neighboring rights to this work.  This work is published from:
-United States.
-
-The files may be used freely in any way.  The intention is that appropriate
-parts of the files be used in other libpng-using programs without any need for
-the authors of the using code to seek copyright or license from the original
-authors.
-
-The source code and comments in this directory are the original work of the
-people named below.  No other person or organization has made contributions to
-the work in this directory.
-
-ORIGINAL AUTHORS
-    The following people have contributed to the code in this directory.  None
-    of the people below claim any rights with regard to the contents of this
-    directory.
-
-    John Bowler <jbowler@acm.org>

contrib/examples/iccfrompng.c

@@ -1,180 +0,0 @@
-/*- iccfrompng
- *
- * COPYRIGHT: Written by John Cunningham Bowler, 2011.
- * To the extent possible under law, the author has waived all copyright and
- * related or neighboring rights to this work.  This work is published from:
- * United States.
- *
- * Extract any icc profiles found in the given PNG files.  This is a simple
- * example of a program which extracts information from the header of a PNG file
- * without processing the image.  Notice that some header information may occur
- * after the image data, textual data and comments are an example; the approach
- * in this file won't work reliably for such data because it only looks for the
- * information in the section of the file that preceeds the image data.
- *
- * Compile and link against libpng and zlib, plus anything else required on the
- * system you use.
- *
- * To use supply a list of PNG files containing iCCP chunks, the chunks will be
- * extracted to a similarly named file with the extension replaced by 'icc',
- * which will be overwritten without warning.
- */
-#include <stdlib.h>
-#include <setjmp.h>
-#include <string.h>
-#include <stdio.h>
-
-#include <png.h>
-
-static int verbose = 1;
-static png_byte no_profile[] = "no profile";
-
-static png_bytep
-extract(FILE *fp, png_uint_32 *proflen)
-{
-   png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0);
-   png_infop info_ptr = NULL;
-   png_bytep result = NULL;
-
-   /* Initialize for error or no profile: */
-   *proflen = 0;
-
-   if (png_ptr == NULL)
-   {
-      fprintf(stderr, "iccfrompng: version library mismatch?\n");
-      return 0;
-   }
-
-   if (setjmp(png_jmpbuf(png_ptr)))
-   {
-      png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
-      return 0;
-   }
-
-   png_init_io(png_ptr, fp);
-
-   info_ptr = png_create_info_struct(png_ptr);
-   if (info_ptr == NULL)
-      png_error(png_ptr, "OOM allocating info structure");
-
-   png_read_info(png_ptr, info_ptr);
-
-   {
-      png_charp name;
-      int compression_type;
-      png_bytep profile;
-
-      if (png_get_iCCP(png_ptr, info_ptr, &name, &compression_type, &profile,
-         proflen) & PNG_INFO_iCCP)
-      {
-         result = malloc(*proflen);
-         if (result != NULL)
-            memcpy(result, profile, *proflen);
-
-         else
-            png_error(png_ptr, "OOM allocating profile buffer");
-      }
-
-      else
-	result = no_profile;
-   }
-
-   png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
-   return result;
-}
-
-static int
-extract_one_file(const char *filename)
-{
-   int result = 0;
-   FILE *fp = fopen(filename, "rb");
-
-   if (fp != NULL)
-   {
-      png_uint_32 proflen = 0;
-      png_bytep profile = extract(fp, &proflen);
-
-      if (profile != NULL && profile != no_profile)
-      {
-         size_t len;
-         char *output;
-
-         {
-            const char *ep = strrchr(filename, '.');
-
-            if (ep != NULL)
-               len = ep-filename;
-
-            else
-               len = strlen(filename);
-         }
-
-         output = malloc(len + 5);
-         if (output != NULL)
-         {
-            FILE *of;
-
-            memcpy(output, filename, len);
-            strcpy(output+len, ".icc");
-
-            of = fopen(output, "wb");
-            if (of != NULL)
-            {
-               if (fwrite(profile, proflen, 1, of) == 1 &&
-                  fflush(of) == 0 &&
-                  fclose(of) == 0)
-               {
-                  if (verbose)
-                     printf("%s -> %s\n", filename, output);
-                  /* Success return */
-                  result = 1;
-               }
-
-               else
-               {
-                  fprintf(stderr, "%s: error writing profile\n", output);
-                  if (remove(output))
-                     fprintf(stderr, "%s: could not remove file\n", output);
-               }
-            }
-
-            else
-               fprintf(stderr, "%s: failed to open output file\n", output);
-
-            free(output);
-         }
-
-         else
-            fprintf(stderr, "%s: OOM allocating string!\n", filename);
-
-         free(profile);
-      }
-
-      else if (verbose && profile == no_profile)
-	printf("%s has no profile\n", filename);
-   }
-
-   else
-      fprintf(stderr, "%s: could not open file\n", filename);
-
-   return result;
-}
-
-int
-main(int argc, char **argv)
-{
-   int i;
-   int extracted = 0;
-
-   for (i=1; i<argc; ++i)
-   {
-      if (strcmp(argv[i], "-q") == 0)
-         verbose = 0;
-
-      else if (extract_one_file(argv[i]))
-         extracted = 1;
-   }
-
-   /* Exit code is true if any extract succeeds */
-   return extracted == 0;
-}

contrib/examples/pngpixel.c

@@ -1,367 +0,0 @@
-/*- pngpixel
- *
- * COPYRIGHT: Written by John Cunningham Bowler, 2011.
- * To the extent possible under law, the author has waived all copyright and
- * related or neighboring rights to this work.  This work is published from:
- * United States.
- *
- * Read a single pixel value from a PNG file.
- *
- * This code illustrates basic 'by-row' reading of a PNG file using libpng.
- * Rows are read until a particular pixel is found, the value of this pixel is
- * then printed on stdout.
- *
- * The code illustrates how to do this on interlaced as well as non-interlaced
- * images.  Normally you would call png_set_interlace_handling() to have libpng
- * deal with the interlace for you, but that obliges you to buffer half of the
- * image to assemble the interlaced rows.  In this code
- * png_set_interlace_handling() is not called and, instead, the code handles the
- * interlace passes directly looking for the required pixel.
- */
-#include <stdlib.h>
-#include <stdio.h>
-#include <setjmp.h> /* required for error handling */
-
-/* Normally use <png.h> here to get the installed libpng, but this is done to
- * ensure the code picks up the local libpng implementation:
- */
-#include "../../png.h"
-
-/* Return component 'c' of pixel 'x' from the given row. */
-static unsigned int
-component(png_const_bytep row, png_uint_32 x, unsigned int c,
-   unsigned int bit_depth, unsigned int channels)
-{
-   /* PNG images can be up to 2^31 pixels wide, but this means they can be up to
-    * 2^37 bits wide (for a 64-bit pixel - the largest possible) and hence 2^34
-    * bytes wide.  Since the row fitted into memory, however, the following must
-    * work:
-    */
-   png_uint_32 bit_offset_hi = bit_depth * ((x >> 6) * channels + c);
-   png_uint_32 bit_offset_lo = bit_depth * ((x & 0x3f) * channels + c);
-
-   row = (png_const_bytep)(((PNG_CONST png_byte (*)[8])row) + bit_offset_hi);
-   row += bit_offset_lo >> 3;
-   bit_offset_lo &= 0x07;
-
-   /* PNG pixels are packed into bytes to put the first pixel in the highest
-    * bits of the byte and into two bytes for 16-bit values with the high 8 bits
-    * first, so:
-    */
-   switch (bit_depth)
-   {
-      case 1: return (row[0] >> (7-bit_offset_lo)) & 0x01;
-      case 2: return (row[0] >> (6-bit_offset_lo)) & 0x03;
-      case 4: return (row[0] >> (4-bit_offset_lo)) & 0x0f;
-      case 8: return row[0];
-      case 16: return (row[0] << 8) + row[1];
-      default:
-         /* This should never happen, it indicates a bug in this program or in
-          * libpng itself:
-          */
-         fprintf(stderr, "pngpixel: invalid bit depth %u\n", bit_depth);
-         exit(1);
-   }
-}
-
-/* Print a pixel from a row returned by libpng; determine the row format, find
- * the pixel, and print the relevant information to stdout.
- */
-static void
-print_pixel(png_structp png_ptr, png_infop info_ptr, png_const_bytep row,
-   png_uint_32 x)
-{
-   PNG_CONST unsigned int bit_depth = png_get_bit_depth(png_ptr, info_ptr);
-
-   switch (png_get_color_type(png_ptr, info_ptr))
-   {
-      case PNG_COLOR_TYPE_GRAY:
-         printf("GRAY %u\n", component(row, x, 0, bit_depth, 1));
-         return;
-
-      /* The palette case is slightly more difficult - the palette and, if
-       * present, the tRNS ('transparency', though the values are really
-       * opacity) data must be read to give the full picture:
-       */
-      case PNG_COLOR_TYPE_PALETTE:
-         {
-            PNG_CONST unsigned int index = component(row, x, 0, bit_depth, 1);
-            png_colorp palette = NULL;
-            int num_palette = 0;
-
-            if ((png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette) &
-               PNG_INFO_PLTE) && num_palette > 0 && palette != NULL)
-            {
-               png_bytep trans_alpha = NULL;
-               int num_trans = 0;
-               if ((png_get_tRNS(png_ptr, info_ptr, &trans_alpha, &num_trans,
-                  NULL) & PNG_INFO_tRNS) && num_trans > 0 &&
-                  trans_alpha != NULL)
-                  printf("INDEXED %u = %d %d %d %d\n", index,
-                     palette[index].red, palette[index].green,
-                     palette[index].blue,
-                     index < num_trans ? trans_alpha[index] : 255);
-
-               else /* no transparency */
-                  printf("INDEXED %u = %d %d %d\n", index, 
-                     palette[index].red, palette[index].green,
-                     palette[index].blue);
-            }
-
-            else
-               printf("INDEXED %u = invalid index\n", index);
-         }
-         return;
-
-      case PNG_COLOR_TYPE_RGB:
-         printf("RGB %u %u %u\n", component(row, x, 0, bit_depth, 3),
-            component(row, x, 1, bit_depth, 3),
-            component(row, x, 2, bit_depth, 3));
-         return;
-
-      case PNG_COLOR_TYPE_GRAY_ALPHA:
-         printf("GRAY+ALPHA %u %u\n", component(row, x, 0, bit_depth, 2),
-            component(row, x, 1, bit_depth, 2));
-         return;
-
-      case PNG_COLOR_TYPE_RGB_ALPHA:
-         printf("RGBA %u %u %u %u\n", component(row, x, 0, bit_depth, 4),
-            component(row, x, 1, bit_depth, 4),
-            component(row, x, 2, bit_depth, 4),
-            component(row, x, 3, bit_depth, 4));
-         return;
-
-      default:
-         png_error(png_ptr, "invalid color type");
-   }
-}
-
-int main(int argc, const char **argv)
-{
-   /* This program uses the default, <setjmp.h> based, libpng error handling
-    * mechanism, therefore any local variable that exists before the call to
-    * setjmp and is changed after the call to setjmp returns successfully must
-    * be declared with 'volatile' to ensure that their values don't get
-    * destroyed by longjmp:
-    */
-   volatile int result = 1/*fail*/;
-
-   if (argc == 4)
-   {
-      long x = atol(argv[1]);
-      long y = atol(argv[2]);
-      FILE *f = fopen(argv[3], "rb");
-      volatile png_bytep row = NULL;
-
-      if (f != NULL)
-      {
-         /* libpng requires a callback function for handling errors; this
-          * callback must not return.  The default callback function uses a
-          * stored <setjmp.h> style jmp_buf which is held in a png_struct and
-          * writes error messages to stderr.  Creating the png_struct is a
-          * little tricky; just copy the following code.
-          */
-         png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,
-            NULL, NULL, NULL);
-
-         if (png_ptr != NULL)
-         {
-            png_infop info_ptr = png_create_info_struct(png_ptr);
-
-            if (info_ptr != NULL)
-            {
-               /* Declare stack variables to hold pointers to locally allocated
-                * data.
-                */
-
-               /* Initialize the error control buffer: */
-               if (setjmp(png_jmpbuf(png_ptr)) == 0)
-               {
-                  png_uint_32 width, height;
-                  int bit_depth, color_type, interlace_method,
-                     compression_method, filter_method;
-                  png_bytep row_tmp;
-
-                  /* Now associate the recently opened (FILE*) with the default
-                   * libpng initialization functions.  Sometimes libpng is
-                   * compiled without stdio support (it can be difficult to do
-                   * in some environments); in that case you will have to write
-                   * your own read callback to read data from the (FILE*).
-                   */
-                  png_init_io(png_ptr, f);
-
-                  /* And read the first part of the PNG file - the header and
-                   * all the information up to the first pixel.
-                   */
-                  png_read_info(png_ptr, info_ptr);
-
-                  /* This fills in enough information to tell us the width of
-                   * each row in bytes, allocate the appropriate amount of
-                   * space.  In this case png_malloc is used - it will not
-                   * return if memory isn't available.
-                   */
-                  row = png_malloc(png_ptr, png_get_rowbytes(png_ptr,
-                     info_ptr));
-
-                  /* To avoid the overhead of using a volatile auto copy row_tmp
-                   * to a local here - just use row for the png_free below.
-                   */
-                  row_tmp = row;
-
-                  /* All the information we need is in the header is returned by
-                   * png_get_IHDR, if this fails we can now use 'png_error' to
-                   * signal the error and return control to the setjmp above.
-                   */
-                  if (png_get_IHDR(png_ptr, info_ptr, &width, &height,
-                     &bit_depth, &color_type, &interlace_method,
-                     &compression_method, &filter_method))
-                  {
-                     int passes, pass;
-
-                     /* png_set_interlace_handling returns the number of
-                      * passes required as well as turning on libpng's
-                      * handling, but since we do it ourselves this is
-                      * necessary:
-                      */
-                     switch (interlace_method)
-                     {
-                        case PNG_INTERLACE_NONE:
-                           passes = 1;
-                           break;
-
-                        case PNG_INTERLACE_ADAM7:
-                           passes = PNG_INTERLACE_ADAM7_PASSES;
-                           break;
-
-                        default:
-                           png_error(png_ptr, "pngpixel: unknown interlace");
-                     }
-
-                     /* Now read the pixels, pass-by-pass, row-by-row: */
-                     png_start_read_image(png_ptr);
-
-                     for (pass=0; pass<passes; ++pass)
-                     {
-                        png_uint_32 ystart, xstart, ystep, xstep;
-                        png_uint_32 py;
-
-                        if (interlace_method == PNG_INTERLACE_ADAM7)
-                        {
-                           /* Sometimes the whole pass is empty because the
-                            * image is too narrow or too short.  libpng
-                            * expects to be called for each row that is
-                            * present in the pass, so it may be necessary to
-                            * skip the loop below (over py) if the image is
-                            * too narrow.
-                            */
-                           if (PNG_PASS_COLS(width, pass) == 0)
-                              continue;
-
-                           /* We need the starting pixel and the offset
-                            * between each pixel in this pass; use the macros
-                            * in png.h:
-                            */
-                           xstart = PNG_PASS_START_COL(pass);
-                           ystart = PNG_PASS_START_ROW(pass);
-                           xstep = PNG_PASS_COL_OFFSET(pass);
-                           ystep = PNG_PASS_ROW_OFFSET(pass);
-                        }
-
-                        else
-                        {
-                           ystart = xstart = 0;
-                           ystep = xstep = 1;
-                        }
-
-                        /* To find the pixel loop over 'py' for each pass
-                         * reading a row and then checking to see if it
-                         * contains the pixel.
-                         */
-                        for (py = ystart; py < height; py += ystep)
-                        {
-                           png_uint_32 px, ppx;
-
-                           /* png_read_row takes two pointers.  When libpng
-                            * handles the interlace the first is filled in
-                            * pixel-by-pixel, the second receives the same
-                            * pixels but they are replicated across the
-                            * unwritten pixels so far for each pass.  When we
-                            * do the interlace, however, they just contain
-                            * the pixels from the interlace pass - giving
-                            * both is wasteful and pointless.
-                            */
-                           png_read_row(png_ptr, row_tmp, NULL);
-
-                           /* Now find the pixel if it is in this row; there
-                            * are, of course, much better ways of doing this
-                            * than using a for loop:
-                            */
-                           if (y == py) for (px = xstart, ppx = 0;
-                              px < width; px += xstep, ++ppx) if (x == px)
-                           {
-                              /* 'ppx' is the index of the pixel in the row
-                               * buffer.
-                               */
-                              print_pixel(png_ptr, info_ptr, row_tmp, ppx);
-
-                              /* Now terminate the loops early - we have
-                               * found and handled the required data.
-                               */
-                              goto pass_loop_end;
-                           } /* x loop */
-                        } /* y loop */
-                     } /* pass loop */
-
-                     /* Finally free the temporary buffer: */
-                  pass_loop_end:
-                     row = NULL;
-                     png_free(png_ptr, row_tmp);
-                  }
-
-                  else
-                     png_error(png_ptr, "pngpixel: png_get_IHDR failed");
-
-               }
-
-               else
-               {
-                  /* Else libpng has raised an error.  An error message has
-                   * already been output, it is only necessary to clean up
-                   * locally allocated data:
-                   */
-                  if (row != NULL)
-                  {
-                     /* The default implementation of png_free never errors out
-                      * (it just crashes if something goes wrong), but the safe
-                      * way of using it is still to clear 'row' before calling
-                      * png_free:
-                      */
-                     png_bytep row_tmp = row;
-                     row = NULL;
-                     png_free(png_ptr, row_tmp);
-                  }
-               }
-
-               png_destroy_info_struct(png_ptr, &info_ptr);
-            }
-
-            else
-               fprintf(stderr, "pngpixel: out of memory allocating png_info\n");
-
-            png_destroy_read_struct(&png_ptr, NULL, NULL);
-         }
-
-         else
-            fprintf(stderr, "pngpixel: out of memory allocating png_struct\n");
-      }
-
-      else
-         fprintf(stderr, "pngpixel: %s: could not open file\n", argv[3]);
-   }
-
-   else
-      /* Wrong number of arguments */
-      fprintf(stderr, "pngpixel: usage: pngpixel x y png-file\n");
-
-   return result;
-}

contrib/examples/pngtopng.c

@@ -1,87 +0,0 @@
-/*- pngtopng
- *
- * COPYRIGHT: Written by John Cunningham Bowler, 2011.
- * To the extent possible under law, the author has waived all copyright and
- * related or neighboring rights to this work.  This work is published from:
- * United States.
- *
- * Read a PNG and write it out in a fixed format, using the 'simplified API'
- * that was introduced in libpng-1.6.0.
- *
- * This sample code is just the code from the top of 'example.c' with some error
- * handling added.  See example.c for more comments.
- */
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-
-/* Normally use <png.h> here to get the installed libpng, but this is done to
- * ensure the code picks up the local libpng implementation:
- */
-#include "../../png.h"
-
-int main(int argc, const char **argv)
-{
-   int result = 1;
-
-   if (argc == 3)
-   {
-      png_image image;
-
-      memset(&image, 0, sizeof image);
-
-      if (png_image_begin_read_from_file(&image, argv[1]))
-      {
-         png_bytep buffer;
-         
-         /* Change this to try different formats! */
-         image.format = PNG_FORMAT_RGBA;
-
-         buffer = malloc(PNG_IMAGE_SIZE(image));
-
-         if (buffer != NULL)
-         {
-            if (png_image_finish_read(&image, NULL/*background*/, buffer,
-               0/*row_stride*/))
-            {
-               if (png_image_write_to_file(&image, argv[2],
-                  0/*convert_to_8bit*/, buffer, 0/*row_stride*/))
-                  result = 0;
-
-               else
-                  fprintf(stderr, "pngtopng: write %s: %s\n", argv[2],
-                      image.message);
-
-               free(buffer);
-            }
-
-            else
-            {
-               fprintf(stderr, "pngtopng: read %s: %s\n", argv[1],
-                   image.message);
-
-               /* This is the only place where a 'free' is required; libpng does
-                * the cleanup on error and success, but in this case we couldn't
-                * complete the read because of running out of memory.
-                */
-               png_image_free(&image);
-            }
-         }
-
-         else
-            fprintf(stderr, "pngtopng: out of memory: %lu bytes\n",
-               (unsigned long)PNG_IMAGE_SIZE(image));
-      }
-
-      else
-         /* Failed to read the first argument: */
-         fprintf(stderr, "pngtopng: %s: %s\n", argv[1], image.message);
-   }
-
-   else
-      /* Wrong number of arguments */
-      fprintf(stderr, "pngtopng: usage: pngtopng input-file output-file\n");
-
-   return result;
-}

contrib/gregbook/COPYING

@@ -1,12 +1,12 @@
-                    GNU GENERAL PUBLIC LICENSE
-                       Version 2, June 1991
+		    GNU GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
 
  Copyright (C) 1989, 1991 Free Software Foundation, Inc.
      59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
-                            Preamble
+			    Preamble
 
   The licenses for most software are designed to take away your
 freedom to share and change it.  By contrast, the GNU General Public
@@ -56,7 +56,7 @@ patent must be licensed for everyone's free use or not licensed at all.
   The precise terms and conditions for copying, distribution and
 modification follow.
 
-                    GNU GENERAL PUBLIC LICENSE
+		    GNU GENERAL PUBLIC LICENSE
    TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
 
   0. This License applies to any program or other work which contains
@@ -255,7 +255,7 @@ make exceptions for this.  Our decision will be guided by the two goals
 of preserving the free status of all derivatives of our free software and
 of promoting the sharing and reuse of software generally.
 
-                            NO WARRANTY
+			    NO WARRANTY
 
   11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
 FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
@@ -277,9 +277,9 @@ YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
 PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGES.
 
-                     END OF TERMS AND CONDITIONS
+		     END OF TERMS AND CONDITIONS
 
-            How to Apply These Terms to Your New Programs
+	    How to Apply These Terms to Your New Programs
 
   If you develop a new program, and you want it to be of the greatest
 possible use to the public, the best way to achieve this is to make it

contrib/gregbook/Makefile.sgi

@@ -23,9 +23,9 @@
 
 # macros --------------------------------------------------------------------
 
-PNGINC = -I/usr/local/include/libpng16
-PNGLIB = -L/usr/local/lib -lpng16	  # dynamically linked against libpng
-#PNGLIB = /usr/local/lib/libpng16.a # statically linked against libpng
+PNGINC = -I/usr/local/include/libpng12
+PNGLIB = -L/usr/local/lib -lpng12	  # dynamically linked against libpng
+#PNGLIB = /usr/local/lib/libpng12.a # statically linked against libpng
 # or:
 #PNGINC = -I../..
 #PNGLIB = -L../.. -lpng

contrib/gregbook/Makefile.unx

@@ -26,14 +26,14 @@
 # macros --------------------------------------------------------------------
 
 #PNGDIR = /usr/local/lib
-#PNGINC = -I/usr/local/include/libpng16
-#PNGLIBd = -L$(PNGDIR) -lpng16 # dynamically linked, installed libpng
-#PNGLIBs = $(PNGDIR)/libpng16.a # statically linked, installed libpng
+#PNGINC = -I/usr/local/include/libpng12
+#PNGLIBd = -L$(PNGDIR) -lpng12 # dynamically linked, installed libpng
+#PNGLIBs = $(PNGDIR)/libpng12.a # statically linked, installed libpng
 # or:
 PNGDIR = ../..#	this one is for libpng-x.y.z/contrib/gregbook builds
 #PNGDIR = ../libpng
 PNGINC = -I$(PNGDIR)
-PNGLIBd = -Wl,-rpath,$(PNGDIR) -L$(PNGDIR) -lpng16	# dynamically linked
+PNGLIBd = -Wl,-rpath,$(PNGDIR) -L$(PNGDIR) -lpng12	# dynamically linked
 PNGLIBs = $(PNGDIR)/libpng.a		# statically linked, local libpng
 
 ZDIR = /usr/local/lib

contrib/gregbook/Makefile.w32

@@ -18,7 +18,7 @@
 # "c:\windows\command.com /e:4096" as the program command line and set the
 # working directory to this directory.  Then double-click to open the new
 # DOS-prompt window with a bigger environment and retry the commands above.
-#
+# 
 # This makefile assumes libpng and zlib have already been built or downloaded
 # and are in subdirectories at the same level as the current subdirectory
 # (as indicated by the PNGPATH and ZPATH macros below).  Edit as appropriate.

contrib/gregbook/README

@@ -63,9 +63,9 @@ BUILD INSTRUCTIONS
 
  - Prerequisites (in order of compilation):
 
-      - zlib            http://zlib.net/
-      - libpng          http://www.libpng.org/pub/png/libpng.html
-      - pngbook         http://www.libpng.org/pub/png/book/sources.html
+      - zlib		http://zlib.net/
+      - libpng		http://www.libpng.org/pub/png/libpng.html
+      - pngbook		http://www.libpng.org/pub/png/book/sources.html
 
      The pngbook demo programs are explicitly designed to demonstrate proper
      coding techniques for using the libpng reference library.  As a result,
@@ -104,7 +104,7 @@ BUILD INSTRUCTIONS
      unpacked the source code.
 
      For MSVC, set up the necessary environment variables by invoking
-
+ 
         %devstudio%\vc\bin\vcvars32.bat
 
      where where %devstudio% is the installation directory for MSVC /
@@ -165,19 +165,19 @@ RUNNING THE PROGRAMS:  (VERY) BRIEF INTRO
      rpng is a simple PNG viewer that can display transparent PNGs with a
      specified background color; for example,
 
-        rpng -bgcolor \#ff0000 toucan.png
+	rpng -bgcolor #ff0000 toucan.png
 
      would display the image with a red background.  rpng2 is a progressive
      viewer that simulates a web browser in some respects; it can display
      images against either a background color or a dynamically generated
      background image.  For example:
 
-        rpng2 -bgpat 16 toucan.png
+	rpng2 -bgpat 16 toucan.png
 
      wpng is a purely command-line image converter from binary PBMPLUS/NetPBM
      format (.pgm or .ppm) to PNG; for example,
 
-        wpng -time < toucan-notrans.ppm > toucan-notrans.png
+	wpng -time < toucan-notrans.ppm > toucan-notrans.png
 
      would convert the specified PPM file (using redirection) to PNG, auto-
      matically setting the PNG modification-time chunk.

contrib/gregbook/makevms.com

@@ -20,13 +20,13 @@ $ if zpath .eqs. ""
 $ then
 $   write sys$output "zlib include not found. Exiting..."
 $   exit 2
-$ endif
+$ endif 
 $!
 $ if pngpath .eqs. ""
 $ then
 $   write sys$output "libpng include not found. Exiting..."
 $   exit 2
-$ endif
+$ endif 
 $!
 $!    Look for the compiler used.
 $!

contrib/gregbook/readpng.c

@@ -55,9 +55,8 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <zlib.h>
 
-#include "png.h"        /* libpng header */
+#include "png.h"        /* libpng header; includes zlib.h */
 #include "readpng.h"    /* typedefs, common macros, public prototypes */
 
 /* future versions of libpng will provide this macro: */
@@ -230,14 +229,8 @@ uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes)
         png_set_expand(png_ptr);
     if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
         png_set_expand(png_ptr);
-#ifdef PNG_READ_16_TO_8_SUPPORTED
     if (bit_depth == 16)
-#  ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
-        png_set_scale_16(png_ptr);
-#  else
         png_set_strip_16(png_ptr);
-#  endif
-#endif
     if (color_type == PNG_COLOR_TYPE_GRAY ||
         color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
         png_set_gray_to_rgb(png_ptr);
@@ -270,8 +263,7 @@ uch *readpng_get_image(double display_exponent, int *pChannels, ulg *pRowbytes)
         return NULL;
     }
 
-    Trace((stderr, "readpng_get_image:  channels = %d, rowbytes = %ld, height = %ld\n",
-        *pChannels, rowbytes, height));
+    Trace((stderr, "readpng_get_image:  channels = %d, rowbytes = %ld, height = %ld\n", *pChannels, rowbytes, height));
 
 
     /* set the individual row_pointers to point at the correct offsets */

contrib/gregbook/readpng2.c

@@ -55,10 +55,8 @@
 
 
 #include <stdlib.h>     /* for exit() prototype */
-#include <setjmp.h>
 
-#include <zlib.h>
-#include "png.h"        /* libpng header from the local directory */
+#include "png.h"        /* libpng header; includes zlib.h and setjmp.h */
 #include "readpng2.h"   /* typedefs, common macros, public prototypes */
 
 
@@ -75,10 +73,84 @@ static void readpng2_error_handler(png_structp png_ptr, png_const_charp msg);
 
 void readpng2_version_info(void)
 {
-    fprintf(stderr, "   Compiled with libpng %s; using libpng %s\n",
-      PNG_LIBPNG_VER_STRING, png_libpng_ver);
+#if defined(PNG_ASSEMBLER_CODE_SUPPORTED) && \
+    (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__)) && \
+    defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
+    /*
+     * WARNING:  This preprocessor approach means that the following code
+     *           cannot be used with a libpng DLL older than 1.2.0--the
+     *           compiled-in symbols for the new functions will not exist.
+     *           (Could use dlopen() and dlsym() on Unix and corresponding
+     *           calls for Windows, but not portable...)
+     */
+    {
+        int mmxsupport = png_mmx_support();
+        if (mmxsupport < 0)
+            fprintf(stderr, "   Compiled with libpng %s; using libpng %s "
+              "without MMX support.\n", PNG_LIBPNG_VER_STRING, png_libpng_ver);
+        else {
+            int compilerID;
+            png_uint_32 mmx_mask = png_get_mmx_flagmask(
+              PNG_SELECT_READ | PNG_SELECT_WRITE, &compilerID);
 
-    fprintf(stderr, "   and with zlib %s; using zlib %s.\n",
+            fprintf(stderr, "   Compiled with libpng %s; using libpng %s "
+              "with MMX support\n   (%s version).", PNG_LIBPNG_VER_STRING,
+              png_libpng_ver, compilerID == 1? "MSVC++" :
+              (compilerID == 2? "GNU C" : "unknown"));
+            fprintf(stderr, "  Processor (x86%s) %s MMX instructions.\n",
+#if defined(__x86_64__)
+              "_64",
+#else
+              "",
+#endif
+              mmxsupport? "supports" : "does not support");
+            if (mmxsupport > 0) {
+                int num_optims = 0;
+
+                fprintf(stderr,
+                  "      Potential MMX optimizations supported by libpng:\n");
+                if (mmx_mask & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)
+                    ++num_optims;
+                if (mmx_mask & PNG_ASM_FLAG_MMX_READ_FILTER_UP)
+                    ++num_optims;
+                if (mmx_mask & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)
+                    ++num_optims;
+                if (mmx_mask & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)
+                    ++num_optims;
+                if (num_optims)
+                    fprintf(stderr,
+                      "         decoding %s row filters (reading)\n",
+                      (num_optims == 4)? "all non-trivial" : "some");
+                if (mmx_mask & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW) {
+                    fprintf(stderr, "         combining rows (reading)\n");
+                    ++num_optims;
+                }
+                if (mmx_mask & PNG_ASM_FLAG_MMX_READ_INTERLACE) {
+                    fprintf(stderr,
+                      "         expanding interlacing (reading)\n");
+                    ++num_optims;
+                }
+                mmx_mask &= ~( PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  \
+                             | PNG_ASM_FLAG_MMX_READ_INTERLACE    \
+                             | PNG_ASM_FLAG_MMX_READ_FILTER_SUB   \
+                             | PNG_ASM_FLAG_MMX_READ_FILTER_UP    \
+                             | PNG_ASM_FLAG_MMX_READ_FILTER_AVG   \
+                             | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH );
+                if (mmx_mask) {
+                    fprintf(stderr, "         other (unknown)\n");
+                    ++num_optims;
+                }
+                if (num_optims == 0)
+                    fprintf(stderr, "         (none)\n");
+            }
+        }
+    }
+#else
+    fprintf(stderr, "   Compiled with libpng %s; using libpng %s "
+      "without MMX support.\n", PNG_LIBPNG_VER_STRING, png_libpng_ver);
+#endif
+
+    fprintf(stderr, "   Compiled with zlib %s; using zlib %s.\n",
       ZLIB_VERSION, zlib_version);
 }
 
@@ -131,7 +203,7 @@ int readpng2_init(mainprog_info *mainprog_ptr)
     }
 
 
-#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
+#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED
     /* prepare the reader to ignore all recognized chunks whose data won't be
      * used, i.e., all chunks recognized by libpng except for IHDR, PLTE, IDAT,
      * IEND, tRNS, bKGD, gAMA, and sRGB (small performance improvement) */
@@ -140,7 +212,7 @@ int readpng2_init(mainprog_info *mainprog_ptr)
          * version recognizes more chunks, add them to this list.  If a
          * future version of readpng2.c recognizes more chunks, delete them
          * from this list. */
-        static /* const */ png_byte chunks_to_ignore[] = {
+        static const png_byte chunks_to_ignore[] = {
              99,  72,  82,  77, '\0',  /* cHRM */
             104,  73,  83,  84, '\0',  /* hIST */
             105,  67,  67,  80, '\0',  /* iCCP */
@@ -160,7 +232,7 @@ int readpng2_init(mainprog_info *mainprog_ptr)
         png_set_keep_unknown_chunks(png_ptr, 1 /* PNG_HANDLE_CHUNK_NEVER */,
           chunks_to_ignore, sizeof(chunks_to_ignore)/5);
     }
-#endif /* PNG_HANDLE_AS_UNKNOWN_SUPPORTED */
+#endif /* PNG_UNKNOWN_CHUNKS_SUPPORTED */
 
 
     /* instead of doing png_init_io() here, now we set up our callback
@@ -170,6 +242,96 @@ int readpng2_init(mainprog_info *mainprog_ptr)
       readpng2_info_callback, readpng2_row_callback, readpng2_end_callback);
 
 
+    /*
+     * may as well enable or disable MMX routines here, if supported;
+     *
+     * to enable all:  mask = png_get_mmx_flagmask (
+     *                   PNG_SELECT_READ | PNG_SELECT_WRITE, &compilerID);
+     *                 flags = png_get_asm_flags (png_ptr);
+     *                 flags |= mask;
+     *                 png_set_asm_flags (png_ptr, flags);
+     *
+     * to disable all:  mask = png_get_mmx_flagmask (
+     *                   PNG_SELECT_READ | PNG_SELECT_WRITE, &compilerID);
+     *                  flags = png_get_asm_flags (png_ptr);
+     *                  flags &= ~mask;
+     *                  png_set_asm_flags (png_ptr, flags);
+     */
+
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__)) && \
+    defined(PNG_LIBPNG_VER) && (PNG_LIBPNG_VER >= 10200)
+    /*
+     * WARNING:  This preprocessor approach means that the following code
+     *           cannot be used with a libpng DLL older than 1.2.0--the
+     *           compiled-in symbols for the new functions will not exist.
+     *           (Could use dlopen() and dlsym() on Unix and corresponding
+     *           calls for Windows, but not portable...)
+     */
+    {
+#ifdef PNG_ASSEMBLER_CODE_SUPPORTED
+        png_uint_32 mmx_disable_mask = 0;
+        png_uint_32 asm_flags, mmx_mask;
+        int compilerID;
+
+        if (mainprog_ptr->nommxfilters)
+            mmx_disable_mask |= ( PNG_ASM_FLAG_MMX_READ_FILTER_SUB   \
+                                | PNG_ASM_FLAG_MMX_READ_FILTER_UP    \
+                                | PNG_ASM_FLAG_MMX_READ_FILTER_AVG   \
+                                | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH );
+        if (mainprog_ptr->nommxcombine)
+            mmx_disable_mask |= PNG_ASM_FLAG_MMX_READ_COMBINE_ROW;
+        if (mainprog_ptr->nommxinterlace)
+            mmx_disable_mask |= PNG_ASM_FLAG_MMX_READ_INTERLACE;
+        asm_flags = png_get_asm_flags(png_ptr);
+        png_set_asm_flags(png_ptr, asm_flags & ~mmx_disable_mask);
+
+
+        /* Now query libpng's asm settings, just for yuks.  Note that this
+         * differs from the querying of its *potential* MMX capabilities
+         * in readpng2_version_info(); this is true runtime verification. */
+
+        asm_flags = png_get_asm_flags(png_ptr);
+        mmx_mask = png_get_mmx_flagmask(PNG_SELECT_READ | PNG_SELECT_WRITE,
+          &compilerID);
+        if (asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_COMPILED)
+            fprintf(stderr,
+              "  MMX support (%s version) is compiled into libpng\n",
+              compilerID == 1? "MSVC++" :
+              (compilerID == 2? "GNU C" : "unknown"));
+        else
+            fprintf(stderr, "  MMX support is not compiled into libpng\n");
+        fprintf(stderr, "  MMX instructions are %ssupported by CPU\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_SUPPORT_IN_CPU)? "" : "not ");
+        fprintf(stderr, "  MMX read support for combining rows is %sabled\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_READ_COMBINE_ROW)? "en" : "dis");
+        fprintf(stderr,
+          "  MMX read support for expanding interlacing is %sabled\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_READ_INTERLACE)? "en" : "dis");
+        fprintf(stderr, "  MMX read support for \"sub\" filter is %sabled\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_SUB)? "en" : "dis");
+        fprintf(stderr, "  MMX read support for \"up\" filter is %sabled\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_UP)? "en" : "dis");
+        fprintf(stderr, "  MMX read support for \"avg\" filter is %sabled\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_AVG)? "en" : "dis");
+        fprintf(stderr, "  MMX read support for \"Paeth\" filter is %sabled\n",
+          (asm_flags & PNG_ASM_FLAG_MMX_READ_FILTER_PAETH)? "en" : "dis");
+        asm_flags &= (mmx_mask & ~( PNG_ASM_FLAG_MMX_READ_COMBINE_ROW  \
+                                  | PNG_ASM_FLAG_MMX_READ_INTERLACE    \
+                                  | PNG_ASM_FLAG_MMX_READ_FILTER_SUB   \
+                                  | PNG_ASM_FLAG_MMX_READ_FILTER_UP    \
+                                  | PNG_ASM_FLAG_MMX_READ_FILTER_AVG   \
+                                  | PNG_ASM_FLAG_MMX_READ_FILTER_PAETH ));
+        if (asm_flags)
+            fprintf(stderr,
+              "  additional MMX support is also enabled (0x%02lx)\n",
+              asm_flags);
+#else  /* !PNG_ASSEMBLER_CODE_SUPPORTED */
+        fprintf(stderr, "  MMX querying is disabled in libpng.\n");
+#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
+    }
+#endif
+
+
     /* make sure we save our pointers for use in readpng2_decode_data() */
 
     mainprog_ptr->png_ptr = png_ptr;
@@ -218,11 +380,7 @@ static void readpng2_info_callback(png_structp png_ptr, png_infop info_ptr)
     mainprog_info  *mainprog_ptr;
     int  color_type, bit_depth;
     png_uint_32 width, height;
-#ifdef PNG_FLOATING_POINT_SUPPORTED
     double  gamma;
-#else
-    png_fixed_point gamma;
-#endif
 
 
     /* setjmp() doesn't make sense here, because we'd either have to exit(),
@@ -311,14 +469,8 @@ static void readpng2_info_callback(png_structp png_ptr, png_infop info_ptr)
         png_set_expand(png_ptr);
     if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
         png_set_expand(png_ptr);
-#ifdef PNG_READ_16_TO_8_SUPPORTED
     if (bit_depth == 16)
-#  ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
-        png_set_scale_16(png_ptr);
-#  else
         png_set_strip_16(png_ptr);
-#  endif
-#endif
     if (color_type == PNG_COLOR_TYPE_GRAY ||
         color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
         png_set_gray_to_rgb(png_ptr);
@@ -339,19 +491,11 @@ static void readpng2_info_callback(png_structp png_ptr, png_infop info_ptr)
      * "gamma" value for the entire display system, i.e., the product of
      * LUT_exponent and CRT_exponent. */
 
-#ifdef PNG_FLOATING_POINT_SUPPORTED
     if (png_get_gAMA(png_ptr, info_ptr, &gamma))
         png_set_gamma(png_ptr, mainprog_ptr->display_exponent, gamma);
     else
         png_set_gamma(png_ptr, mainprog_ptr->display_exponent, 0.45455);
-#else
-    if (png_get_gAMA_fixed(png_ptr, info_ptr, &gamma))
-        png_set_gamma_fixed(png_ptr,
-            (png_fixed_point)(100000*mainprog_ptr->display_exponent+.5), gamma);
-    else
-        png_set_gamma_fixed(png_ptr,
-            (png_fixed_point)(100000*mainprog_ptr->display_exponent+.5), 45455);
-#endif
+
 
     /* we'll let libpng expand interlaced images, too */
 
@@ -500,12 +644,5 @@ static void readpng2_error_handler(png_structp png_ptr, png_const_charp msg)
         exit(99);
     }
 
-    /* Now we have our data structure we can use the information in it
-     * to return control to our own higher level code (all the points
-     * where 'setjmp' is called in this file.)  This will work with other
-     * error handling mechanisms as well - libpng always calls png_error
-     * when it can proceed no further, thus, so long as the error handler
-     * is intercepted, application code can do its own error recovery.
-     */
     longjmp(mainprog_ptr->jmpbuf, 1);
 }

contrib/gregbook/readpng2.h

@@ -96,6 +96,11 @@ typedef struct _mainprog_info {
     int rowbytes;
     int channels;
     int need_bgcolor;
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
+    int nommxfilters;
+    int nommxcombine;
+    int nommxinterlace;
+#endif
     int state;
     uch bg_red;
     uch bg_green;

contrib/gregbook/rpng-win.c

@@ -85,33 +85,7 @@
 #include <string.h>
 #include <time.h>
 #include <windows.h>
-#ifdef __CYGWIN__
-/* getch replacement. Turns out, we don't really need this,
- * but leave it here if we ever enable any of the uses of
- * _getch in the main code
- */
-#include <unistd.h>
-#include <termio.h>
-#include <sys/ioctl.h>
-int repl_getch( void )
-{
-  char ch;
-  int fd = fileno(stdin);
-  struct termio old_tty, new_tty;
-
-  ioctl(fd, TCGETA, &old_tty);
-  new_tty = old_tty;
-  new_tty.c_lflag &= ~(ICANON | ECHO | ISIG);
-  ioctl(fd, TCSETA, &new_tty);
-  fread(&ch, 1, sizeof(ch), stdin);
-  ioctl(fd, TCSETA, &old_tty);
-
-  return ch;
-}
-#define _getch repl_getch
-#else
 #include <conio.h>      /* only for _getch() */
-#endif
 
 /* #define DEBUG  :  this enables the Trace() macros */
 
@@ -179,7 +153,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
 
     filename = (char *)NULL;
 
-#ifndef __CYGWIN__
+
     /* First reenable console output, which normally goes to the bit bucket
      * for windowed apps.  Closing the console window will terminate the
      * app.  Thanks to David.Geldreich@realviz.com for supplying the magical
@@ -188,7 +162,6 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
     AllocConsole();
     freopen("CONOUT$", "a", stderr);
     freopen("CONOUT$", "a", stdout);
-#endif
 
 
     /* Next set the default value for our display-system exponent, i.e.,
@@ -306,9 +279,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
     /* print usage screen if any errors up to this point */
 
     if (error) {
-#ifndef __CYGWIN__
         int ch;
-#endif
 
         fprintf(stderr, "\n%s %s:  %s\n\n", PROGNAME, VERSION, appname);
         readpng_version_info();
@@ -322,15 +293,11 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
           "\t\t  (e.g., ``#ff7700'' for orange:  same as HTML colors);\n"
           "\t\t  used with transparent images\n"
           "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n"
-#ifndef __CYGWIN__
           "Press Q or Esc to quit this usage screen.\n"
-#endif
           "\n", PROGNAME, default_display_exponent);
-#ifndef __CYGWIN__
         do
             ch = _getch();
         while (ch != 'q' && ch != 'Q' && ch != 0x1B);
-#endif
         exit(1);
     }
 
@@ -366,24 +333,18 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
 
 
     if (error) {
-#ifndef __CYGWIN__
         int ch;
-#endif
 
         fprintf(stderr, PROGNAME ":  aborting.\n");
-#ifndef __CYGWIN__
         do
             ch = _getch();
         while (ch != 'q' && ch != 'Q' && ch != 0x1B);
-#endif
         exit(2);
     } else {
         fprintf(stderr, "\n%s %s:  %s\n", PROGNAME, VERSION, appname);
-#ifndef __CYGWIN__
         fprintf(stderr,
           "\n   [console window:  closing this window will terminate %s]\n\n",
           PROGNAME);
-#endif
     }
 
 
@@ -456,12 +417,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
     /* wait for the user to tell us when to quit */
 
     printf(
-#ifndef __CYGWIN__
-      "Done.  Press Q, Esc or mouse button 1 (within image window) to quit.\n"
-#else
-      "Done.  Press mouse button 1 (within image window) to quit.\n"
-#endif
-    );
+      "Done.  Press Q, Esc or mouse button 1 (within image window) to quit.\n");
     fflush(stdout);
 
     while (GetMessage(&msg, NULL, 0, 0)) {

contrib/gregbook/rpng-x.c

@@ -81,8 +81,8 @@
 #define PROGNAME  "rpng-x"
 #define LONGNAME  "Simple PNG Viewer for X"
 #define VERSION   "2.01 of 16 March 2008"
-#define RESNAME   "rpng"        /* our X resource application name */
-#define RESCLASS  "Rpng"        /* our X resource class name */
+#define RESNAME   "rpng"	/* our X resource application name */
+#define RESCLASS  "Rpng"	/* our X resource class name */
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -252,8 +252,8 @@ int main(int argc, char **argv)
             else {
                 bgstr = *argv;
                 if (strlen(bgstr) != 7 || bgstr[0] != '#')
-                    ++error;
-                else
+                    ++error; 
+                else 
                     have_bg = TRUE;
             }
         } else {

contrib/gregbook/rpng2-win.c

@@ -32,7 +32,6 @@
     - 2.01:  fixed 64-bit typo in readpng2.c
     - 2.02:  fixed improper display of usage screen on PNG error(s); fixed
               unexpected-EOF and file-read-error cases
-    - 2.03:  removed runtime MMX-enabling/disabling and obsolete -mmx* options
 
   ---------------------------------------------------------------------------
 
@@ -96,33 +95,7 @@
 #include <time.h>
 #include <math.h>      /* only for PvdM background code */
 #include <windows.h>
-#ifdef __CYGWIN__
-/* getch replacement. Turns out, we don't really need this,
- * but leave it here if we ever enable any of the uses of
- * _getch in the main code
- */
-#include <unistd.h>
-#include <termio.h>
-#include <sys/ioctl.h>
-int repl_getch( void )
-{
-  char ch;
-  int fd = fileno(stdin);
-  struct termio old_tty, new_tty;
-
-  ioctl(fd, TCGETA, &old_tty);
-  new_tty = old_tty;
-  new_tty.c_lflag &= ~(ICANON | ECHO | ISIG);
-  ioctl(fd, TCSETA, &new_tty);
-  fread(&ch, 1, sizeof(ch), stdin);
-  ioctl(fd, TCSETA, &old_tty);
-
-  return ch;
-}
-#define _getch repl_getch
-#else
 #include <conio.h>     /* only for _getch() */
-#endif
 
 /* all for PvdM background code: */
 #ifndef PI
@@ -296,7 +269,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
     filename = (char *)NULL;
     memset(&rpng2_info, 0, sizeof(mainprog_info));
 
-#ifndef __CYGWIN__
+
     /* Next reenable console output, which normally goes to the bit bucket
      * for windowed apps.  Closing the console window will terminate the
      * app.  Thanks to David.Geldreich@realviz.com for supplying the magical
@@ -305,7 +278,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
     AllocConsole();
     freopen("CONOUT$", "a", stderr);
     freopen("CONOUT$", "a", stdout);
-#endif
+
 
     /* Set the default value for our display-system exponent, i.e., the
      * product of the CRT exponent and the exponent corresponding to
@@ -422,6 +395,18 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
             }
         } else if (!strncmp(*argv, "-timing", 2)) {
             timing = TRUE;
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
+        } else if (!strncmp(*argv, "-nommxfilters", 7)) {
+            rpng2_info.nommxfilters = TRUE;
+        } else if (!strncmp(*argv, "-nommxcombine", 7)) {
+            rpng2_info.nommxcombine = TRUE;
+        } else if (!strncmp(*argv, "-nommxinterlace", 7)) {
+            rpng2_info.nommxinterlace = TRUE;
+        } else if (!strcmp(*argv, "-nommx")) {
+            rpng2_info.nommxfilters = TRUE;
+            rpng2_info.nommxcombine = TRUE;
+            rpng2_info.nommxinterlace = TRUE;
+#endif
         } else {
             if (**argv != '-') {
                 filename = *argv;
@@ -439,14 +424,15 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
     /* print usage screen if any errors up to this point */
 
     if (error) {
-#ifndef __CYGWIN__
         int ch;
-#endif
 
         fprintf(stderr, "\n%s %s:  %s\n\n", PROGNAME, VERSION, appname);
         readpng2_version_info();
         fprintf(stderr, "\n"
           "Usage:  %s [-gamma exp] [-bgcolor bg | -bgpat pat] [-timing]\n"
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
+          "        %*s [[-nommxfilters] [-nommxcombine] [-nommxinterlace] | -nommx]\n"
+#endif
           "        %*s file.png\n\n"
           "    exp \ttransfer-function exponent (``gamma'') of the display\n"
           "\t\t  system in floating-point format (e.g., ``%.1f''); equal\n"
@@ -459,24 +445,21 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
           "\t\t  transparent images; overrides -bgcolor option\n"
           "    -timing\tenables delay for every block read, to simulate modem\n"
           "\t\t  download of image (~36 Kbps)\n"
-          "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n"
-#ifndef __CYGWIN__
-          "Press Q or Esc to quit this usage screen. ",
-#else
-          ,
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
+          "    -nommx*\tdisable optimized MMX routines for decoding row filters,\n"
+          "\t\t  combining rows, and expanding interlacing, respectively\n"
 #endif
+          "\nPress Q, Esc or mouse button 1 after image is displayed to quit.\n"
+          "Press Q or Esc to quit this usage screen. ",
           PROGNAME,
-#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__)) && \
-    !(defined(__CYGWIN__) || defined(__MINGW32__))
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
           (int)strlen(PROGNAME), " ",
 #endif
           (int)strlen(PROGNAME), " ", default_display_exponent, num_bgpat);
         fflush(stderr);
-#ifndef __CYGWIN__
         do
             ch = _getch();
         while (ch != 'q' && ch != 'Q' && ch != 0x1B);
-#endif
         exit(1);
     }
 
@@ -513,24 +496,18 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
 
 
     if (error) {
-#ifndef __CYGWIN__
         int ch;
-#endif
 
         fprintf(stderr, PROGNAME ":  aborting.\n");
-#ifndef __CYGWIN__
         do
             ch = _getch();
         while (ch != 'q' && ch != 'Q' && ch != 0x1B);
-#endif
         exit(2);
     } else {
         fprintf(stderr, "\n%s %s:  %s\n", PROGNAME, VERSION, appname);
-#ifndef __CYGWIN__
         fprintf(stderr,
           "\n   [console window:  closing this window will terminate %s]\n\n",
           PROGNAME);
-#endif
         fflush(stderr);
     }
 
@@ -590,7 +567,7 @@ int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PSTR cmd, int showmode)
                   "(unexpectedly) while reading PNG image file\n");
                 exit(3);
             } else /* if (error) */ {
-                /* will print error message below */
+                // will print error message below
             }
             break;
         }
@@ -1173,12 +1150,7 @@ static void rpng2_win_finish_display()
 
     rpng2_info.state = kDone;
     printf(
-#ifndef __CYGWIN__
-      "Done.  Press Q, Esc or mouse button 1 (within image window) to quit.\n"
-#else
-      "Done.  Press mouse button 1 (within image window) to quit.\n"
-#endif
-    );
+      "Done.  Press Q, Esc or mouse button 1 (within image window) to quit.\n");
     fflush(stdout);
 }
 

contrib/gregbook/rpng2-x.c

@@ -40,7 +40,6 @@
     - 2.02:  fixed improper display of usage screen on PNG error(s); fixed
               unexpected-EOF and file-read-error cases; fixed Trace() cut-and-
               paste bugs
-    - 2.03:  deleted runtime MMX-enabling/disabling and obsolete -mmx* options
 
   ---------------------------------------------------------------------------
 
@@ -95,9 +94,9 @@
 
 #define PROGNAME  "rpng2-x"
 #define LONGNAME  "Progressive PNG Viewer for X"
-#define VERSION   "2.03 of 25 February 2010"
-#define RESNAME   "rpng2"       /* our X resource application name */
-#define RESCLASS  "Rpng"       /* our X resource class name */
+#define VERSION   "2.02 of 16 March 2008"
+#define RESNAME   "rpng2"	/* our X resource application name */
+#define RESCLASS  "Rpng"	/* our X resource class name */
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -132,7 +131,7 @@
                   (e.type == KeyPress &&   /*  v--- or 1 for shifted keys */  \
                   ((k = XLookupKeysym(&e.xkey, 0)) == XK_q || k == XK_Escape)))
 
-#define NO_24BIT_MASKS /* undef case not fully written--only for redisplay() */
+#define NO_24BIT_MASKS	/* undef case not fully written--only for redisplay() */
 
 #define rgb1_max   bg_freq
 #define rgb1_min   bg_gray
@@ -302,7 +301,7 @@ int main(int argc, char **argv)
     int have_bg = FALSE;
 #ifdef FEATURE_LOOP
     int loop = FALSE;
-    long loop_interval = -1;            /* seconds (100,000 max) */
+    long loop_interval = -1;		/* seconds (100,000 max) */
 #endif
     double LUT_exponent;                /* just the lookup table */
     double CRT_exponent = 2.2;          /* just the monitor */
@@ -435,6 +434,18 @@ int main(int argc, char **argv)
                 else if (loop_interval > 100000)   /* bit more than one day */
                     loop_interval = 100000;
             }
+#endif
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
+        } else if (!strncmp(*argv, "-nommxfilters", 7)) {
+            rpng2_info.nommxfilters = TRUE;
+        } else if (!strncmp(*argv, "-nommxcombine", 7)) {
+            rpng2_info.nommxcombine = TRUE;
+        } else if (!strncmp(*argv, "-nommxinterlace", 7)) {
+            rpng2_info.nommxinterlace = TRUE;
+        } else if (!strcmp(*argv, "-nommx")) {
+            rpng2_info.nommxfilters = TRUE;
+            rpng2_info.nommxcombine = TRUE;
+            rpng2_info.nommxinterlace = TRUE;
 #endif
         } else {
             if (**argv != '-') {
@@ -457,6 +468,9 @@ int main(int argc, char **argv)
         readpng2_version_info();
         fprintf(stderr, "\n"
           "Usage:  %s [-display xdpy] [-gamma exp] [-bgcolor bg | -bgpat pat]\n"
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
+          "        %*s [[-nommxfilters] [-nommxcombine] [-nommxinterlace] | -nommx]\n"
+#endif
 #ifdef FEATURE_LOOP
           "        %*s [-usleep dur | -timing] [-pause] [-loop [sec]] file.png\n\n"
 #else
@@ -476,6 +490,10 @@ int main(int argc, char **argv)
           "    -loop\tloops through background images after initial display\n"
           "\t\t  is complete (depends on -bgpat)\n"
           "    sec \tseconds to display each background image (default = 2)\n"
+#endif
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
+          "    -nommx*\tdisable optimized MMX routines for decoding row filters,\n"
+          "\t\t  combining rows, and expanding interlacing, respectively\n"
 #endif
           "    dur \tduration in microseconds to wait after displaying each\n"
           "\t\t  row (for demo purposes)\n"
@@ -485,6 +503,9 @@ int main(int argc, char **argv)
           "\nPress Q, Esc or mouse button 1 (within image window, after image\n"
           "is displayed) to quit.\n"
           "\n", PROGNAME,
+#if (defined(__i386__) || defined(_M_IX86) || defined(__x86_64__))
+          (int)strlen(PROGNAME), " ",
+#endif
           (int)strlen(PROGNAME), " ", default_display_exponent, num_bgpat-1);
         exit(1);
     }
@@ -591,7 +612,7 @@ int main(int argc, char **argv)
                   "(unexpectedly) while reading PNG image file\n");
                 exit(3);
             } else /* if (error) */ {
-                /* will print error message below */
+                // will print error message below
             }
             break;
         }
@@ -781,9 +802,8 @@ static void rpng2_x_init(void)
     if (rpng2_x_create_window()) {
 
         /* GRR TEMPORARY HACK:  this is fundamentally no different from cases
-         * above; libpng should call our error handler to longjmp() back to us
-         * when png_ptr goes away.  If we/it segfault instead, seems like a
-         * libpng bug... */
+         * above; libpng should longjmp() back to us when png_ptr goes away.
+         * If we/it segfault instead, seems like a libpng bug... */
 
         /* we're here via libpng callback, so if window fails, clean and bail */
         readpng2_cleanup(&rpng2_info);
@@ -1277,7 +1297,7 @@ static int rpng2_x_load_bg_image(void)
         for (row = 0;  row < rpng2_info.height;  ++row) {
             src = bg_data + row*bg_rowbytes;
             dest = ximage->data + row*ximage_rowbytes;
-            if (bpp == 32) {    /* slightly optimized version */
+            if (bpp == 32) {	/* slightly optimized version */
                 for (i = rpng2_info.width;  i > 0;  --i) {
                     red   = *src++;
                     green = *src++;

contrib/gregbook/writepng.c

@@ -55,9 +55,8 @@
 
 
 #include <stdlib.h>     /* for exit() prototype */
-#include <zlib.h>
 
-#include "png.h"        /* libpng header, includes setjmp.h */
+#include "png.h"        /* libpng header; includes zlib.h and setjmp.h */
 #include "writepng.h"   /* typedefs, common macros, public prototypes */
 
 
@@ -105,8 +104,7 @@ int writepng_init(mainprog_info *mainprog_ptr)
     /* setjmp() must be called in every function that calls a PNG-writing
      * libpng function, unless an alternate error handler was installed--
      * but compatible error handlers must either use longjmp() themselves
-     * (as in this program) or some other method to return control to
-     * application code, so here we go: */
+     * (as in this program) or exit immediately, so here we go: */
 
     if (setjmp(mainprog_ptr->jmpbuf)) {
         png_destroy_write_struct(&png_ptr, &info_ptr);
@@ -390,12 +388,5 @@ static void writepng_error_handler(png_structp png_ptr, png_const_charp msg)
         exit(99);
     }
 
-    /* Now we have our data structure we can use the information in it
-     * to return control to our own higher level code (all the points
-     * where 'setjmp' is called in this file.)  This will work with other
-     * error handling mechanisms as well - libpng always calls png_error
-     * when it can proceed no further, thus, so long as the error handler
-     * is intercepted, application code can do its own error recovery.
-     */
     longjmp(mainprog_ptr->jmpbuf, 1);
 }

contrib/libtests/timepng.c

@@ -1,303 +0,0 @@
-/* timepng.c
- *
- * Copyright (c) 2012 John Cunningham Bowler
- *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * Load an arbitrary number of PNG files (from the command line, or, if there
- * are no arguments on the command line, from stdin) then run a time test by
- * reading each file by row.  The test does nothing with the read result and
- * does no transforms.  The only output is a time as a floating point number of
- * seconds with 9 decimal digits.
- */
-#define _POSIX_C_SOURCE 199309L /* for clock_gettime */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-
-#include <time.h>
-
-#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H)
-#  include <config.h>
-#endif
-
-/* Define the following to use this test against your installed libpng, rather
- * than the one being built here:
- */
-#ifdef PNG_FREESTANDING_TESTS
-#  include <png.h>
-#else
-#  include "../../png.h"
-#endif
-
-static int read_png(FILE *fp)
-{
-   png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0);
-   png_infop info_ptr = NULL;
-   png_bytep row = NULL, display = NULL;
-
-   if (png_ptr == NULL)
-      return 0;
-
-   if (setjmp(png_jmpbuf(png_ptr)))
-   {
-      png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
-      if (row != NULL) free(row);
-      if (display != NULL) free(display);
-      return 0;
-   }
-
-   png_init_io(png_ptr, fp);
-
-   info_ptr = png_create_info_struct(png_ptr);
-   if (info_ptr == NULL)
-      png_error(png_ptr, "OOM allocating info structure");
-
-   png_read_info(png_ptr, info_ptr);
-
-   {
-      png_size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr);
-
-      row = malloc(rowbytes);
-      display = malloc(rowbytes);
-
-      if (row == NULL || display == NULL)
-         png_error(png_ptr, "OOM allocating row buffers");
-
-      {
-         png_uint_32 height = png_get_image_height(png_ptr, info_ptr);
-         int passes = png_set_interlace_handling(png_ptr);
-         int pass;
-
-         png_start_read_image(png_ptr);
-
-         for (pass = 0; pass < passes; ++pass)
-         {
-            png_uint_32 y = height;
-
-            /* NOTE: this trashes the row each time; interlace handling won't
-             * work, but this avoids memory thrashing for speed testing.
-             */
-            while (y-- > 0)
-               png_read_row(png_ptr, row, display);
-         }
-      }
-   }
-
-   /* Make sure to read to the end of the file: */
-   png_read_end(png_ptr, info_ptr);
-   png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
-   free(row);
-   free(display);
-   return 1;
-}
-
-static int mytime(struct timespec *t)
-{
-   /* Do the timing using clock_gettime and the per-process timer. */
-   if (!clock_gettime(CLOCK_PROCESS_CPUTIME_ID, t))
-      return 1;
-
-   perror("CLOCK_PROCESS_CPUTIME_ID");
-   fprintf(stderr, "timepng: could not get the time\n");
-   return 0;
-}
-
-static int perform_one_test(FILE *fp, int nfiles)
-{
-   int i;
-   struct timespec before, after;
-
-   /* Clear out all errors: */
-   rewind(fp);
-
-   if (mytime(&before))
-   {
-      for (i=0; i<nfiles; ++i)
-      {
-         if (read_png(fp))
-         {
-            if (ferror(fp))
-            {
-               perror("temporary file");
-               fprintf(stderr, "file %d: error reading PNG data\n", i);
-               return 0;
-            }
-         }
-
-         else
-         {
-            perror("temporary file");
-            fprintf(stderr, "file %d: error from libpng\n", i);
-            return 0;
-         }
-      }
-   }
-
-   else
-      return 0;
-
-   if (mytime(&after))
-   {
-      /* Work out the time difference and print it - this is the only output,
-       * so flush it immediately.
-       */
-      unsigned long s = after.tv_sec - before.tv_sec;
-      long ns = after.tv_nsec - before.tv_nsec;
-
-      if (ns < 0)
-      {
-         --s;
-         ns += 1000000000;
-
-         if (ns < 0)
-         {
-            fprintf(stderr, "timepng: bad clock from kernel\n");
-            return 0;
-         }
-      }
-
-      printf("%lu.%.9ld\n", s, ns);
-      fflush(stdout);
-      if (ferror(stdout))
-      {
-         fprintf(stderr, "timepng: error writing output\n");
-         return 0;
-      }
-
-      /* Successful return */
-      return 1;
-   }
-
-   else
-      return 0;
-}
-
-static int add_one_file(FILE *fp, char *name)
-{
-   FILE *ip = fopen(name, "rb");
-
-   if (ip != NULL)
-   {
-      int ch;
-      for (;;)
-      {
-         ch = getc(ip);
-         if (ch == EOF) break;
-         putc(ch, fp);
-      }
-
-      if (ferror(ip))
-      {
-         perror(name);
-         fprintf(stderr, "%s: read error\n", name);
-         return 0;
-      }
-
-      (void)fclose(ip);
-
-      if (ferror(fp))
-      {
-         perror("temporary file");
-         fprintf(stderr, "temporary file write error\n");
-         return 0;
-      }
-   }
-
-   else
-   {
-      perror(name);
-      fprintf(stderr, "%s: open failed\n", name);
-      return 0;
-   }
-
-   return 1;
-}
-
-int main(int argc, char **argv)
-{
-   int ok = 0;
-   FILE *fp = tmpfile();
-
-   if (fp != NULL)
-   {
-      int err = 0;
-      int nfiles = 0;
-
-      if (argc > 1)
-      {
-         int i;
-
-         for (i=1; i<argc; ++i)
-         {
-            if (add_one_file(fp, argv[i]))
-               ++nfiles;
-
-            else
-            {
-               err = 1;
-               break;
-            }
-         }
-      }
-
-      else
-      {
-         char filename[FILENAME_MAX+1];
-
-         while (fgets(filename, FILENAME_MAX+1, stdin))
-         {
-            int len = strlen(filename);
-
-            if (filename[len-1] == '\n')
-            {
-               filename[len-1] = 0;
-               if (add_one_file(fp, filename))
-                  ++nfiles;
-
-               else
-               {
-                  err = 1;
-                  break;
-               }
-            }
-
-            else
-            {
-               fprintf(stderr, "timepng: truncated file name ...%s\n",
-                  filename+len-32);
-               err = 1;
-               break;
-            }
-         }
-
-         if (ferror(stdin))
-         {
-            fprintf(stderr, "timepng: stdin: read error\n");
-            err = 1;
-         }
-      }
-
-      if (!err)
-      {
-         if (nfiles > 0)
-            ok = perform_one_test(fp, nfiles);
-
-         else
-            fprintf(stderr, "usage: timepng {files} or ls files | timepng\n");
-      }
-
-      (void)fclose(fp);
-   }
-
-   else
-      fprintf(stderr, "timepng: could not open temporary file\n");
-
-   /* Exit code 0 on success. */
-   return ok == 0;
-}

contrib/pngminim/README

@@ -1,5 +0,0 @@
-
-This demonstrates the use of PNG_USER_CONFIG, pngusr.h and pngusr.dfa
-to build minimal decoder, encoder, and progressive reader applications.
-
-See the individual README and pngusr.dfa files for more explanation.

contrib/pngminim/decoder/README

@@ -1,10 +0,0 @@
-This demonstrates the use of PNG_USER_CONFIG, pngusr.h and pngusr.dfa
-
-The makefile builds a minimal read-only decoder with embedded libpng
-and zlib.
-
-Specify the location of the zlib source (1.2.1 or later) as ZLIBSRC
-on the make command line.
-
-If you prefer to use the shared libraries, go to contrib/pngminus
-and build the png2pnm application there.

contrib/pngminim/decoder/makefile

@@ -1,150 +0,0 @@
-# Makefile for PngMinus (pngm2pnm)
-# Linux / Unix
-
-#CC=cc
-CC=gcc
-LD=$(CC)
-
-# If awk fails try
-# make AWK=nawk
-
-# If cpp fails try
-# make CPP=/lib/cpp
-
-RM=rm -f
-COPY=cp
-
-CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP -I. -O1
-
-C=.c
-O=.o
-L=.a
-E=
-
-# Where to find the source code:
-PNGSRC =../../..
-ZLIBSRC=$(PNGSRC)/../zlib
-PROGSRC=$(PNGSRC)/contrib/pngminus
-
-# Zlib (minimal inflate requirements - crc32 is used by libpng)
-# zutil can be eliminated if you provide your own zcalloc and zcfree
-ZSRCS  = adler32$(C) crc32$(C) \
-	 inffast$(C) inflate$(C) inftrees$(C) \
-	 zutil$(C)
-
-# Standard headers
-ZH     = zlib.h crc32.h inffast.h inffixed.h \
-	 inflate.h inftrees.h zutil.h
-
-# Machine generated headers
-ZCONF  = zconf.h
-
-# Headers callers use
-ZINC   = zlib.h $(ZCONF)
-
-# Headers the Zlib source uses
-ZHDRS  = $(ZH) $(ZCONF)
-
-ZOBJS  = adler32$(O) crc32$(O) \
-	 inffast$(O) inflate$(O) inftrees$(O) \
-	 zutil$(O)
-
-# libpng
-PNGSRCS=png$(C) pngerror$(C) pngget$(C) pngmem$(C) \
-	pngread$(C) pngrio$(C) pngrtran$(C) pngrutil$(C) \
-	pngset$(C) pngtrans$(C)
-	
-# Standard headers
-PNGH   =png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h
-
-# Machine generated headers
-PNGCONF=pnglibconf.h
-
-# Headers callers use
-PNGINC= png.h pngconf.h pngusr.h $(PNGCONF)
-
-# Headers the PNG library uses
-PNGHDRS=$(PNGH) $(PNGCONF) pngusr.h
-
-PNGOBJS=png$(O) pngerror$(O) pngget$(O) pngmem$(O) \
-	pngread$(O) pngrio$(O) pngrtran$(O) pngrutil$(O) \
-	pngset$(O) pngtrans$(O)
-
-PROGSRCS= pngm2pnm$(C)
-PROGHDRS=
-PROGDOCS=
-PROGOBJS= pngm2pnm$(O)
-
-OBJS    = $(PROGOBJS) $(PNGOBJS) $(ZOBJS)
-
-# implicit make rules -------------------------------------------------------
-
-# note: dependencies do not work on implicit rule lines
-.c$(O):
-	$(CC) -c $(CFLAGS) $<
-
-# dependencies
-
-all: pngm2pnm$(E)
-
-pngm2pnm$(E): $(OBJS)
-	$(LD) -o pngm2pnm$(E) $(OBJS)
-
-# The DFA_XTRA setting turns all libpng options off then
-# turns on those required for this minimal build.
-# The CPP_FLAGS setting causes pngusr.h to be included in
-# both the build of pnglibconf.h and, subsequently, when
-# building libpng itself.
-$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak\
-	$(PNGSRC)/scripts/pnglibconf.dfa \
-	$(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa
-	$(RM) pnglibconf.h pnglibconf.dfn
-	$(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\
-	    srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG"\
-	    DFA_XTRA="pngusr.dfa" $@
-
-clean:
-	$(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\
-	    srcdir=$(PNGSRC) clean
-	$(RM) pngm2pnm$(O)
-	$(RM) pngm2pnm$(E)
-	$(RM) $(OBJS)
-
-# distclean also removes the copied source and headers
-distclean: clean
-	$(RM) -r scripts # historical reasons
-	$(RM) $(PNGSRCS) $(PNGH)
-	$(RM) $(ZSRCS) $(ZH) $(ZCONF)
-	$(RM) $(PROGSRCS) $(PROGHDRS) $(PROGDOCS)
-
-# Header file dependencies:
-$(PROGOBJS): $(PROGHDRS) $(PNGINC) $(ZINC)
-$(PNGOBJS): $(PNGHDRS) $(ZINC)
-$(ZOBJS): $(ZHDRS)
-
-# Gather the source code from the respective directories
-$(PNGSRCS) $(PNGH): $(PNGSRC)/$@
-	$(RM) $@
-	$(COPY) $(PNGSRC)/$@ $@
-
-# No dependency on the ZLIBSRC target so that it only needs
-# to be specified once.
-$(ZSRCS) $(ZH):
-	$(RM) $@
-	$(COPY) $(ZLIBSRC)/$@ $@
-
-# The unconfigured zconf.h varies in name according to the
-# zlib release
-$(ZCONF):
-	$(RM) $@
-	@for f in zconf.h.in zconf.in.h zconf.h; do\
-	    test -r $(ZLIBSRC)/$$f &&\
-	    echo $(COPY) $(ZLIBSRC)/$$f $@ &&\
-	    $(COPY) $(ZLIBSRC)/$$f $@ && exit 0;\
-	done; echo copy: $(ZLIBSRC)/zconf.h not found; exit 1
-
-pngm2pnm.c: $(PROGSRC)/png2pnm.c
-	$(RM) $@
-	$(COPY) $(PROGSRC)/png2pnm.c $@
-
-# End of makefile for pngm2pnm

contrib/pngminim/decoder/pngusr.dfa

@@ -1,39 +0,0 @@
-# pngminim/decoder/pngusr.dfa
-#
-# Copyright (c) 2010-2011 Glenn Randers-Pehrson
-#
-# This code is released under the libpng license.
-# For conditions of distribution and use, see the disclaimer
-# and license in png.h
-
-# First all the build options off:
-
-everything = off
-
-# All that is required is some read code. This example switches
-# on the sequential read code (see ../preader for a progressive
-# read example).
-
-option SEQUENTIAL_READ on
-
-# You must choose fixed or floating point arithmetic:
-# option FLOATING_POINT on
-
-option FIXED_POINT on
-
-# You must chose the internal fixed point implementation or to
-# use the system floating point.  The latter is considerably
-# smaller (by about 1kbyte on an x86 system):
-# option FLOATING_ARITHMETIC on
-
-option FLOATING_ARITHMETIC off
-
-# Your program will probably need other options.  The example
-# program here, pngm2pnm, requires the following.  Take a look
-# at pnglibconf.h to find out the full set of what has to be
-# enabled to make the following work.
-
-option SETJMP on
-option STDIO on
-option READ_EXPAND on
-option READ_STRIP_16_TO_8 on

contrib/pngminim/decoder/pngusr.h

@@ -1,24 +0,0 @@
-/* minrdpngconf.h: headers to make a minimal png-read-only library
- *
- * Copyright (c) 2007, 2010-2011 Glenn Randers-Pehrson
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * Derived from pngcrush.h, Copyright 1998-2007, Glenn Randers-Pehrson
- */
-
-#ifndef MINRDPNGCONF_H
-#define MINRDPNGCONF_H
-
-/* To include pngusr.h set -DPNG_USER_CONFIG in CPPFLAGS */
-
-/* List options to turn off features of the build that do not
- * affect the API (so are not recorded in pnglibconf.h)
- */
-
-#define PNG_NO_WARNINGS
-#define PNG_ALIGN_TYPE PNG_ALIGN_NONE
-
-#endif /* MINRDPNGCONF_H */

contrib/pngminim/encoder/README

@@ -1,10 +0,0 @@
-This demonstrates the use of PNG_USER_CONFIG and pngusr.h
-
-The makefile builds a minimal write-only decoder with embedded libpng
-and zlib.
-
-Specify the location of the zlib source (1.2.1 or later) as ZLIBSRC
-on the make command line.
-
-If you prefer to use the shared libraries, go to contrib/pngminus
-and build the pnm2png application there.

contrib/pngminim/encoder/makefile

@@ -1,149 +0,0 @@
-# Makefile for PngMinus (pnm2pngm)
-# Linux / Unix
-
-#CC=cc
-CC=gcc
-LD=$(CC)
-
-# If awk fails try
-# make AWK=nawk
-
-# If cpp fails try
-# make CPP=/lib/cpp
-
-RM=rm -f
-COPY=cp
-
-CFLAGS=-DPNG_USER_CONFIG -DNO_GZIP -I. -O1
-
-C=.c
-O=.o
-L=.a
-E=
-
-# Where to find the source code:
-PNGSRC =../../..
-ZLIBSRC=$(PNGSRC)/../zlib
-PROGSRC=$(PNGSRC)/contrib/pngminus
-
-# Zlib
-ZSRCS  = adler32$(C) compress$(C) crc32$(C) deflate$(C) \
-	 trees$(C) zutil$(C)
-
-# Standard headers
-#ZH     = zlib.h crc32.h deflate.h trees.h zutil.h
-ZH     = zlib.h crc32.h deflate.h trees.h zutil.h
-
-# Machine generated headers
-ZCONF  = zconf.h
-
-# Headers callers use
-ZINC   = zlib.h $(ZCONF)
-
-# Headers the Zlib source uses
-ZHDRS  = $(ZH) $(ZCONF)
-
-# compress is not required; it is needed to link the zlib
-# code because deflate defines an unused API function deflateBound
-# which itself calls compressBound from compress.
-ZOBJS  = adler32$(O) compress$(O) crc32$(O) deflate$(O) \
-	 trees$(O) zutil$(O)
-
-# libpng
-PNGSRCS=png$(C) pngerror$(C) pngget$(C) pngmem$(C) \
-	pngset$(C) pngtrans$(C) pngwio$(C) pngwrite$(C) \
-	pngwtran$(C) pngwutil$(C)
-
-# Standard headers
-PNGH   =png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h
-
-# Machine generated headers
-PNGCONF=pnglibconf.h
-
-# Headers callers use
-PNGINC= png.h pngconf.h pngusr.h $(PNGCONF)
-
-# Headers the PNG library uses
-PNGHDRS=$(PNGH) $(PNGCONF) pngusr.h
-
-PNGOBJS=png$(O) pngerror$(O) pngget$(O) pngmem$(O) \
-	pngset$(O) pngtrans$(O) pngwio$(O) pngwrite$(O) \
-	pngwtran$(O) pngwutil$(O)
-
-PROGSRCS= pnm2pngm$(C)
-PROGHDRS=
-PROGDOCS=
-PROGOBJS= pnm2pngm$(O)
-
-OBJS    = $(PROGOBJS) $(PNGOBJS) $(ZOBJS)
-
-# implicit make rules -------------------------------------------------------
-
-.c$(O):
-	$(CC) -c $(CFLAGS) $<
-
-# dependencies
-
-all: pnm2pngm$(E)
-
-pnm2pngm$(E): $(OBJS)
-	$(LD) -o pnm2pngm$(E) $(OBJS)
-
-# The DFA_XTRA setting turns all libpng options off then
-# turns on those required for this minimal build.
-# The CPP_FLAGS setting causes pngusr.h to be included in
-# both the build of pnglibconf.h and, subsequently, when
-# building libpng itself.
-$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak\
-	$(PNGSRC)/scripts/pnglibconf.dfa \
-	$(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa
-	$(RM) pnglibconf.h pnglibconf.dfn
-	$(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\
-	    srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG"\
-	    DFA_XTRA="pngusr.dfa" $@
-
-clean:
-	$(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\
-	    srcdir=$(PNGSRC) clean
-	$(RM) pnm2pngm$(O)
-	$(RM) pnm2pngm$(E)
-	$(RM) $(OBJS)
-
-# distclean also removes the copied source and headers
-distclean: clean
-	$(RM) -r scripts # historical reasons
-	$(RM) $(PNGSRCS) $(PNGH)
-	$(RM) $(ZSRCS) $(ZH) $(ZCONF)
-	$(RM) $(PROGSRCS) $(PROGHDRS) $(PROGDOCS)
-
-# Header file dependencies:
-$(PROGOBJS): $(PROGHDRS) $(PNGINC) $(ZINC)
-$(PNGOBJS): $(PNGHDRS) $(ZINC)
-$(ZOBJS): $(ZHDRS)
-
-# Gather the source code from the respective directories
-$(PNGSRCS) $(PNGH): $(PNGSRC)/$@
-	$(RM) $@
-	$(COPY) $(PNGSRC)/$@ $@
-
-# No dependency on the ZLIBSRC target so that it only needs
-# to be specified once.
-$(ZSRCS) $(ZH):
-	$(RM) $@
-	$(COPY) $(ZLIBSRC)/$@ $@
-
-# The unconfigured zconf.h varies in name according to the
-# zlib release
-$(ZCONF):
-	$(RM) $@
-	@for f in zconf.h.in zconf.in.h zconf.h; do\
-	    test -r $(ZLIBSRC)/$$f &&\
-	    echo $(COPY) $(ZLIBSRC)/$$f $@ &&\
-	    $(COPY) $(ZLIBSRC)/$$f $@ && exit 0;\
-	done; echo copy: $(ZLIBSRC)/zconf.h not found; exit 1
-
-pnm2pngm.c: $(PROGSRC)/pnm2png.c
-	$(RM) $@
-	$(COPY) $(PROGSRC)/pnm2png.c $@
-
-# End of makefile for pnm2pngm

contrib/pngminim/encoder/pngusr.dfa

@@ -1,35 +0,0 @@
-# pngminim/encoder/pngusr.dfa
-#
-# Copyright (c) 2010-2011 Glenn Randers-Pehrson
-#
-# This code is released under the libpng license.
-# For conditions of distribution and use, see the disclaimer
-# and license in png.h
-
-# First all the build options off:
-
-everything = off
-
-# Switch on the write code - this makes a minimalist encoder
-
-option WRITE on
-
-# You must choose fixed or floating point arithmetic:
-# option FLOATING_POINT on
-
-option FIXED_POINT on
-
-# You must chose the internal fixed point implementation or to
-# use the system floating point.  The latter is considerably
-# smaller (by about 1kbyte on an x86 system):
-# option FLOATING_ARITHMETIC on
-
-option FLOATING_ARITHMETIC off
-
-# Your program will probably need other options.  The example
-# program here, pnm2pngm, requires the following.  Take a look
-# at pnglibconf.h to find out the full set of what has to be
-# enabled to make the following work.
-
-option SETJMP on
-option STDIO on

contrib/pngminim/encoder/pngusr.h

@@ -1,24 +0,0 @@
-/* minwrpngconf.h: headers to make a minimal png-write-only library
- *
- * Copyright (c) 2007, 2010-2011 Glenn Randers-Pehrson
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * Derived from pngcrush.h, Copyright 1998-2007, Glenn Randers-Pehrson
- */
-
-#ifndef MINWRPNGCONF_H
-#define MINWRPNGCONF_H
-
-/* To include pngusr.h set -DPNG_USER_CONFIG in CPPFLAGS */
-
-/* List options to turn off features of the build that do not
- * affect the API (so are not recorded in pnglibconf.h)
- */
-
-#define PNG_NO_WARNINGS
-#define PNG_ALIGN_TYPE PNG_ALIGN_NONE
-
-#endif /* MINWRPNGCONF_H */

contrib/pngminim/preader/README

@@ -1,15 +0,0 @@
-This demonstrates the use of PNG_USER_CONFIG and pngusr.h
-
-The makefile builds a minimal read-only progressive decoder with
-embedded libpng, zlib and your system's X library.
-
-Specify the location of the zlib source (1.2.1 or later) as ZLIBSRC
-on the make command line.
-
-Edit makefile if required, to find your X library and include files,
-then
-
-    make ZLIBSRC=directory
-
-If you prefer to use the shared libraries, go to contrib/gregbook
-and build the rpng2-x application there.

contrib/pngminim/preader/makefile

@@ -1,165 +0,0 @@
-# Makefile for PngMinus (rpng2)
-# Linux / Unix
-
-#CC=cc
-CC=gcc
-LD=$(CC)
-
-# If awk fails try
-# make AWK=nawk
-
-# If cpp fails try
-# make CPP=/lib/cpp
-
-RM=rm -f
-COPY=cp
-
-#XINC = -I/usr/include			# old-style, stock X distributions
-#XLIB = -L/usr/lib/X11 -lX11		#  (including SGI IRIX)
-
-#XINC = -I/usr/openwin/include		# Sun workstations (OpenWindows)
-#XLIB = -L/usr/openwin/lib -lX11
-
-XINC = -I/usr/X11R6/include		# new X distributions (X.org, etc.)
-XLIB = -L/usr/X11R6/lib -lX11
-#XLIB = -L/usr/X11R6/lib64 -lX11	# e.g., Red Hat on AMD64
-
-#XINC = -I/usr/local/include   		# FreeBSD
-#XLIB = -L/usr/local/lib -lX11
-
-#LIBS = $(XLIB)
-LIBS = $(XLIB) -lm                      #platforms that need libm
-
-CFLAGS=-DPNG_USER_CONFIG -DNO_GZCOMPRESS -DNO_GZIP -I. $(XINC) -O1
-
-C=.c
-O=.o
-L=.a
-E=
-
-# Where to find the source code:
-PNGSRC =../../..
-ZLIBSRC=$(PNGSRC)/../zlib
-PROGSRC=$(PNGSRC)/contrib/gregbook
-
-# Zlib (minimal inflate requirements - crc32 is used by libpng)
-# zutil can be eliminated if you provide your own zcalloc and zcfree
-ZSRCS  = adler32$(C) crc32$(C) \
-	 inffast$(C) inflate$(C) inftrees$(C) \
-	 zutil$(C)
-
-# Standard headers
-ZH     = zlib.h crc32.h inffast.h inffixed.h \
-	 inflate.h inftrees.h zutil.h
-
-# Machine generated headers
-ZCONF  = zconf.h
-
-# Headers callers use
-ZINC   = zlib.h $(ZCONF)
-
-# Headers the Zlib source uses
-ZHDRS  = $(ZH) $(ZCONF)
-
-ZOBJS  = adler32$(O) crc32$(O) \
-	 inffast$(O) inflate$(O) inftrees$(O) \
-	 zutil$(O)
-
-# libpng
-PNGSRCS=png$(C) pngerror$(C) pngget$(C) pngmem$(C) \
-	pngpread$(C) pngread$(C) pngrio$(C) pngrtran$(C) pngrutil$(C) \
-	pngset$(C) pngtrans$(C)
-
-# Standard headers
-PNGH   =png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h
-
-# Machine generated headers
-PNGCONF=pnglibconf.h
-
-# Headers callers use
-PNGINC= png.h pngconf.h pngusr.h $(PNGCONF)
-
-# Headers the PNG library uses
-PNGHDRS=$(PNGH) $(PNGCONF) pngusr.h
-
-PNGOBJS=png$(O) pngerror$(O) pngget$(O) pngmem$(O) \
-	pngpread$(O) pngread$(O) pngrio$(O) pngrtran$(O) pngrutil$(O) \
-	pngset$(O) pngtrans$(O)
-
-PROGSRCS= rpng2-x$(C) readpng2$(C)
-PROGHDRS= readpng2.h
-PROGDOCS= COPYING LICENSE
-PROGOBJS= rpng2-x$(O) readpng2$(O)
-
-OBJS    = $(PROGOBJS) $(PNGOBJS) $(ZOBJS)
-
-# implicit make rules -------------------------------------------------------
-
-.c$(O):
-	$(CC) -c $(CFLAGS) $<
-
-# dependencies
-
-all: $(PROGDOCS) rpng2-x$(E)
-
-rpng2-x$(E): $(OBJS)
-	$(LD) -o rpng2-x$(E) $(OBJS) $(LIBS)
-
-# The DFA_XTRA setting turns all libpng options off then
-# turns on those required for this minimal build.
-# The CPP_FLAGS setting causes pngusr.h to be included in
-# both the build of pnglibconf.h and, subsequently, when
-# building libpng itself.
-$(PNGCONF): $(PNGSRC)/scripts/pnglibconf.mak\
-	$(PNGSRC)/scripts/pnglibconf.dfa \
-	$(PNGSRC)/scripts/options.awk pngusr.h pngusr.dfa
-	$(RM) pnglibconf.h pnglibconf.dfn
-	$(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\
-	    srcdir=$(PNGSRC) CPPFLAGS="-DPNG_USER_CONFIG"\
-	    DFA_XTRA="pngusr.dfa" $@
-
-clean:
-	$(MAKE) $(MAKEFLAGS) -f $(PNGSRC)/scripts/pnglibconf.mak\
-	    srcdir=$(PNGSRC) clean
-	$(RM) rpng2-x$(O)
-	$(RM) rpng2-x$(E)
-	$(RM) $(OBJS)
-
-# distclean also removes the copied source and headers
-distclean: clean
-	$(RM) -r scripts # historical reasons
-	$(RM) $(PNGSRCS) $(PNGH)
-	$(RM) $(ZSRCS) $(ZH) $(ZCONF)
-	$(RM) $(PROGSRCS) $(PROGHDRS) $(PROGDOCS)
-
-# Header file dependencies:
-$(PROGOBJS): $(PROGHDRS) $(PNGINC) $(ZINC)
-$(PNGOBJS): $(PNGHDRS) $(ZINC)
-$(ZOBJS): $(ZHDRS)
-
-# Gather the source code from the respective directories
-$(PNGSRCS) $(PNGH): $(PNGSRC)/$@
-	$(RM) $@
-	$(COPY) $(PNGSRC)/$@ $@
-
-# No dependency on the ZLIBSRC target so that it only needs
-# to be specified once.
-$(ZSRCS) $(ZH):
-	$(RM) $@
-	$(COPY) $(ZLIBSRC)/$@ $@
-
-# The unconfigured zconf.h varies in name according to the
-# zlib release
-$(ZCONF):
-	$(RM) $@
-	@for f in zconf.h.in zconf.in.h zconf.h; do\
-	    test -r $(ZLIBSRC)/$$f &&\
-	    echo $(COPY) $(ZLIBSRC)/$$f $@ &&\
-	    $(COPY) $(ZLIBSRC)/$$f $@ && exit 0;\
-	done; echo copy: $(ZLIBSRC)/zconf.h not found; exit 1
-
-$(PROGSRCS) $(PROGHDRS) $(PROGDOCS): $(PROGSRC)/$@
-	$(RM) $@
-	$(COPY) $(PROGSRC)/$@ $@
-
-# End of makefile for rpng2-x

contrib/pngminim/preader/pngusr.dfa

@@ -1,40 +0,0 @@
-# pngminim/preader/pngusr.dfa
-#
-# Copyright (c) 2010-2011 Glenn Randers-Pehrson
-#
-# This code is released under the libpng license.
-# For conditions of distribution and use, see the disclaimer
-# and license in png.h
-
-# First all the build options off:
-
-everything = off
-
-# Just switch on the progressive read code
-
-option PROGRESSIVE_READ on
-
-# You may choose fixed or floating point APIs:
-# option FLOATING_POINT on
-
-option FIXED_POINT on
-
-# You must chose the internal fixed point implementation or to
-# use the system floating point.  The latter is considerably
-# smaller (by about 1kbyte on an x86 system):
-
-option FLOATING_ARITHMETIC on
-# option FLOATING_ARITHMETIC off
-
-# Your program will probably need other options.  The example
-# program here, rpng2-x, requires the following.  Take a look
-# at pnglibconf.h to find out the full set of what has to be
-# enabled to make the following work.
-
-option SETJMP on
-option STDIO on
-option READ_bKGD on
-option READ_GAMMA on
-option READ_EXPAND on
-option READ_STRIP_16_TO_8 on
-option READ_GRAY_TO_RGB on

contrib/pngminim/preader/pngusr.h

@@ -1,24 +0,0 @@
-/* minrdpngconf.h: headers to make a minimal png-read-only library
- *
- * Copyright (c) 2009, 2010-2011 Glenn Randers-Pehrson
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- *
- * Derived from pngcrush.h, Copyright 1998-2007, Glenn Randers-Pehrson
- */
-
-#ifndef MINPRDPNGCONF_H
-#define MINPRDPNGCONF_H
-
-/* To include pngusr.h set -DPNG_USER_CONFIG in CPPFLAGS */
-
-/* List options to turn off features of the build that do not
- * affect the API (so are not recorded in pnglibconf.h)
- */
-
-#define PNG_NO_WARNINGS
-#define PNG_ALIGN_TYPE PNG_ALIGN_NONE
-
-#endif /* MINPRDPNGCONF_H */

contrib/pngminus/makefile.std

@@ -8,9 +8,9 @@ LD=$(CC)
 RM=rm -f
 
 #PNGPATH = /usr/local
-#PNGINC = -I$(PNGPATH)/include/libpng16
-#PNGLIB = -L$(PNGPATH)/lib -lpng16
-#PNGLIBS = $(PNGPATH)/lib/libpng16.a
+#PNGINC = -I$(PNGPATH)/include/libpng12
+#PNGLIB = -L$(PNGPATH)/lib -lpng12
+#PNGLIBS = $(PNGPATH)/lib/libpng12.a
 PNGINC = -I../..
 PNGLIB = -L../.. -lpng
 PNGLIBS = ../../libpng.a
@@ -23,9 +23,9 @@ ZINC = -I../../../zlib
 ZLIB = -L../../../zlib -lz
 ZLIBS = ../../../zlib/libz.a
 
-CFLAGS=$(PNGINC) $(ZINC)
-LDLIBS=$(PNGLIB) $(ZLIB)
-LDLIBSS=$(PNGLIBS) $(ZLIBS)
+CFLAGS=-O3 $(PNGINC) $(ZINC)
+LDFLAGS=$(PNGLIB) $(ZLIB)
+LDFLAGSS=$(PNGLIBS) $(ZLIBS)
 C=.c
 O=.o
 L=.a
@@ -40,19 +40,19 @@ png2pnm$(O): png2pnm$(C)
 	$(CC) -c $(CFLAGS) png2pnm$(C)
 
 png2pnm$(E): png2pnm$(O)
-	$(LD) $(LDFLAGS) -o png2pnm$(E) png2pnm$(O) $(LDLIBS) -lm
+	$(LD) -o png2pnm$(E) png2pnm$(O) $(LDFLAGS) -lm
 
 png2pnm-static$(E): png2pnm$(O)
-	$(LD) $(LDFLAGS) -o png2pnm-static$(E) png2pnm$(O) $(LDLIBSS) -lm
+	$(LD) -o png2pnm-static$(E) png2pnm$(O) $(LDFLAGSS) -lm
 
 pnm2png$(O): pnm2png$(C)
 	$(CC) -c $(CFLAGS) pnm2png$(C)
 
 pnm2png$(E): pnm2png$(O)
-	$(LD) $(LDFLAGS) -o pnm2png$(E) pnm2png$(O) $(LDLIBS) -lm
+	$(LD) -o pnm2png$(E) pnm2png$(O) $(LDFLAGS) -lm
 
 pnm2png-static$(E): pnm2png$(O)
-	$(LD) $(LDFLAGS) -o pnm2png-static$(E) pnm2png$(O) $(LDLIBSS) -lm
+	$(LD) -o pnm2png-static$(E) pnm2png$(O) $(LDFLAGSS) -lm
 
 clean:
 	$(RM) png2pnm$(O)

contrib/pngminus/png2pnm.c

@@ -18,7 +18,6 @@
 #include <mem.h>
 #include <fcntl.h>
 #endif
-#include <zlib.h>
 
 #ifndef BOOL
 #define BOOL unsigned char
@@ -145,7 +144,7 @@ int main(int argc, char *argv[])
   if (png2pnm (fp_rd, fp_wr, fp_al, raw, alpha) == FALSE)
   {
     fprintf (stderr, "PNG2PNM\n");
-    fprintf (stderr, "Error:  unsuccessful conversion of PNG-image\n");
+    fprintf (stderr, "Error:  unsuccessful convertion of PNG-image\n");
     exit(1);
   }
 
@@ -189,7 +188,7 @@ void usage()
 BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL alpha)
 {
   png_struct    *png_ptr = NULL;
-  png_info        *info_ptr = NULL;
+  png_info	*info_ptr = NULL;
   png_byte      buf[8];
   png_byte      *png_pixels = NULL;
   png_byte      **row_pointers = NULL;
@@ -212,8 +211,8 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a
   if (ret != 8)
     return FALSE;
 
-  ret = png_sig_cmp (buf, 0, 8);
-  if (ret)
+  ret = !png_sig_cmp (buf, 0, 8);
+  if (!ret)
     return FALSE;
 
   /* create png and info structures */
@@ -382,7 +381,7 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a
           fputc ((int) *pix_ptr++ , pnm_file);
         else
           if (bit_depth == 16){
-            dep_16 = (long) *pix_ptr++;
+	    dep_16 = (long) *pix_ptr++;
             fprintf (pnm_file, "%ld ", (dep_16 << 8) + ((long) *pix_ptr++));
           }
           else
@@ -402,9 +401,9 @@ BOOL png2pnm (FILE *png_file, FILE *pnm_file, FILE *alpha_file, BOOL raw, BOOL a
             fputc ((int) *pix_ptr++ , alpha_file);
           else
             if (bit_depth == 16){
-              dep_16 = (long) *pix_ptr++;
+	      dep_16 = (long) *pix_ptr++;
               fprintf (alpha_file, "%ld ", (dep_16 << 8) + (long) *pix_ptr++);
-            }
+	    }  
             else
               fprintf (alpha_file, "%ld ", (long) *pix_ptr++);
         }

contrib/pngminus/pnm2png.c

@@ -18,7 +18,6 @@
 #include <mem.h>
 #include <fcntl.h>
 #endif
-#include <zlib.h>
 
 #ifndef BOOL
 #define BOOL unsigned char
@@ -198,9 +197,6 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
   char          height_token[16];
   char          maxval_token[16];
   int           color_type;
-  unsigned long   ul_width, ul_alpha_width;
-  unsigned long   ul_height, ul_alpha_height;
-  unsigned long   ul_maxval;
   png_uint_32   width, alpha_width;
   png_uint_32   height, alpha_height;
   png_uint_32   maxval;
@@ -231,15 +227,11 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
     raw = (type_token[1] == '5');
     color_type = PNG_COLOR_TYPE_GRAY;
     get_token(pnm_file, width_token);
-    sscanf (width_token, "%lu", &ul_width);
-    width = (png_uint_32) ul_width;
+    sscanf (width_token, "%lu", &width);
     get_token(pnm_file, height_token);
-    sscanf (height_token, "%lu", &ul_height);
-    height = (png_uint_32) ul_height;
+    sscanf (height_token, "%lu", &height);
     get_token(pnm_file, maxval_token);
-    sscanf (maxval_token, "%lu", &ul_maxval);
-    maxval = (png_uint_32) ul_maxval;
-    
+    sscanf (maxval_token, "%lu", &maxval);
     if (maxval <= 1)
       bit_depth = 1;
     else if (maxval <= 3)
@@ -256,14 +248,11 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
     raw = (type_token[1] == '6');
     color_type = PNG_COLOR_TYPE_RGB;
     get_token(pnm_file, width_token);
-    sscanf (width_token, "%lu", &ul_width);
-    width = (png_uint_32) ul_width;
+    sscanf (width_token, "%lu", &width);
     get_token(pnm_file, height_token);
-    sscanf (height_token, "%lu", &ul_height);
-    height = (png_uint_32) ul_height;
+    sscanf (height_token, "%lu", &height);
     get_token(pnm_file, maxval_token);
-    sscanf (maxval_token, "%lu", &ul_maxval);
-    maxval = (png_uint_32) ul_maxval;
+    sscanf (maxval_token, "%lu", &maxval);
     if (maxval <= 1)
       bit_depth = 1;
     else if (maxval <= 3)
@@ -298,18 +287,15 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
     {
       alpha_raw = (type_token[1] == '5');
       get_token(alpha_file, width_token);
-      sscanf (width_token, "%lu", &ul_alpha_width);
-      alpha_width=(png_uint_32) ul_alpha_width;
+      sscanf (width_token, "%lu", &alpha_width);
       if (alpha_width != width)
         return FALSE;
       get_token(alpha_file, height_token);
-      sscanf (height_token, "%lu", &ul_alpha_height);
-      alpha_height = (png_uint_32) ul_alpha_height;
+      sscanf (height_token, "%lu", &alpha_height);
       if (alpha_height != height)
         return FALSE;
       get_token(alpha_file, maxval_token);
-      sscanf (maxval_token, "%lu", &ul_maxval);
-      maxval = (png_uint_32) ul_maxval;
+      sscanf (maxval_token, "%lu", &maxval);
       if (maxval <= 1)
         alpha_depth = 1;
       else if (maxval <= 3)
@@ -524,7 +510,6 @@ png_uint_32 get_value (FILE *pnm_file, int depth)
 {
   static png_uint_32 mask = 0;
   png_byte token[16];
-  unsigned long ul_ret_value;
   png_uint_32 ret_value;
   int i = 0;
 
@@ -533,8 +518,7 @@ png_uint_32 get_value (FILE *pnm_file, int depth)
       mask = (mask << 1) | 0x01;
 
   get_token (pnm_file, (char *) token);
-  sscanf ((const char *) token, "%lu", &ul_ret_value);
-  ret_value = (png_uint_32) ul_ret_value;
+  sscanf ((const char *) token, "%lu", &ret_value);
 
   ret_value &= mask;
 

contrib/pngsuite/README

@@ -1,58 +1,41 @@
 
 pngsuite
 --------
-(c) Willem van Schaik, 1999, 2011
+(c) Willem van Schaik, 1999
 
-Permission to use, copy, modify, and distribute these images for any
-purpose and without fee is hereby granted.
+Permission to use, copy, and distribute these images for any purpose and
+without fee is hereby granted.
 
-The 15 "bas*.png" images are part of the much larger PngSuite test-set of
-images, available for developers of PNG supporting software. The
-complete set, available at http:/www.schaik.com/pngsuite/, contains
+These 15 images are part of the much larger PngSuite test-set of 
+images, available for developers of PNG supporting software. The 
+complete set, available at http:/www.schaik.com/pngsuite/, contains 
 a variety of images to test interlacing, gamma settings, ancillary
 chunks, etc.
 
-The "ft*.png" images are "free/libre" replacements for the transparent
-corresponding t*.png images in the PngSuite.
-
 The images in this directory represent the basic PNG color-types:
 grayscale (1-16 bit deep), full color (8 or 16 bit), paletted
 (1-8 bit) and grayscale or color images with alpha channel. You
 can use them to test the proper functioning of PNG software.
 
-    filename       depth type
+    filename      depth type
     ------------ ------ --------------
-    basn0g01.png   1-bit grayscale
-    basn0g02.png   2-bit grayscale
-    basn0g04.png   4-bit grayscale
-    basn0g08.png   8-bit grayscale
-    basn0g16.png  16-bit grayscale
-    basn2c08.png   8-bit truecolor
-    basn2c16.png  16-bit truecolor
-    basn3p01.png   1-bit paletted
-    basn3p02.png   2-bit paletted
-    basn3p04.png   4-bit paletted
-    basn3p08.png   8-bit paletted
-    basn4a08.png   8-bit gray with alpha
-    basn4a16.png  16-bit gray with alpha
-    basn6a08.png   8-bit RGBA
-    basn6a16.png  16-bit RGBA
+    basn0g01.png  1-bit grayscale
+    basn0g02.png  2-bit grayscale
+    basn0g04.png  4-bit grayscale
+    basn0g08.png  8-bit grayscale
+    basn0g16.png 16-bit grayscale
+    basn2c08.png  8-bit truecolor
+    basn2c16.png 16-bit truecolor
+    basn3p01.png  1-bit paletted
+    basn3p02.png  2-bit paletted
+    basn3p04.png  4-bit paletted
+    basn3p08.png  8-bit paletted
+    basn4a08.png  8-bit gray with alpha
+    basn4a16.png 16-bit gray with alpha
+    basn6a08.png  8-bit RGBA
+    basn6a16.png 16-bit RGBA
 
-    ftbbn0g04.png  4-bit grayscale, black bKGD
-    ftbbn2c16.png 16-bit truecolor, black bKGD
-    ftbbn3p08.png  8-bit paletted, black bKGD
-    ftbgn2c16.png 16-bit truecolor, gray bKGD
-    ftbgn3p08.png  8-bit paletted, gray bKGD
-    ftbrn2c08.png  8-bit truecolor, red bKGD
-    ftbwn0g16.png 16-bit gray, white bKGD
-    ftbwn3p08.png  8-bit paletted, white bKGD
-    ftbyn3p08.png  8-bit paletted, yellow bKGD
-    ftp0n0g08.png  8-bit grayscale, opaque
-    ftp0n2c08.png  8-bit truecolor, opaque
-    ftp0n3p08.png  8-bit paletted, opaque
-    ftp1n3p08.png  8-bit paletted, no bKGD
-
-Here is the correct result of typing "pngtest -m bas*.png" in
+Here is the correct result of typing "pngtest -m *.png" in
 this directory:
 
 Testing basn0g01.png: PASS (524 zero samples)

contrib/tools/README.txt

@@ -1,26 +0,0 @@
-This directory (contrib/tools) contains tools used by the authors of libpng.
-
-Code and data placed in this directory is not required to build libpng,
-however the code in this directory has been used to generate data or code in
-the body of the libpng source.  The source code identifies where this has
-been done.  Code in this directory may not compile on all operating systems
-that libpng supports.
-
-NO COPYRIGHT RIGHTS ARE CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY.
-
-To the extent possible under law, the authors have waived all copyright and
-related or neighboring rights to this work.  This work is published from:
-United States.
-
-The files may be used freely in any way.
-
-The source code and comments in this directory are the original work of the
-people named below.  No other person or organization has made contributions to
-the work in this directory.
-
-ORIGINAL AUTHORS
-    The following people have contributed to the code in this directory.  None
-    of the people below claim any rights with regard to the contents of this
-    directory.
-
-    John Bowler <jbowler@acm.org>

contrib/tools/cvtcolor.c

@@ -1,188 +0,0 @@
-/*-
- * convert.c
- *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- *
- * COPYRIGHT: Written by John Cunningham Bowler, 2012.
- * To the extent possible under law, the author has waived all copyright and
- * related or neighboring rights to this work.  This work is published from:
- * United States.
- *
- * Convert 8-bit sRGB or 16-bit linear values to another format.
- */
-#define _ISOC99_SOURCE 1
-
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include <stdio.h>
-
-#include <fenv.h>
-
-#include "sRGB.h"
-
-static void
-usage(const char *prog)
-{
-   fprintf(stderr,
-      "%s: usage: %s [-linear|-sRGB] [-gray|-color] component{1,4}\n",
-      prog, prog);
-   exit(1);
-}
-
-unsigned long
-component(const char *prog, const char *arg, int issRGB)
-{
-   char *ep;
-   unsigned long c = strtoul(arg, &ep, 0);
-
-   if (ep <= arg || *ep || c > 65535 || (issRGB && c > 255))
-   {
-      fprintf(stderr, "%s: %s: invalid component value (%lu)\n", prog, arg, c);
-      usage(prog);
-   }
-
-   return c;
-}
-
-int
-main(int argc, const char **argv)
-{
-   const char *prog = *argv++;
-   int to_linear = 0, to_gray = 0, to_color = 0;
-   int channels = 0;
-   double c[4];
-
-   /* FE_TONEAREST is the IEEE754 round to nearest, preferring even, mode; i.e.
-    * everything rounds to the nearest value except that '.5' rounds to the
-    * nearest even value.
-    */
-   fesetround(FE_TONEAREST);
-
-   c[3] = c[2] = c[1] = c[0] = 0;
-
-   while (--argc > 0 && **argv == '-')
-   {
-      const char *arg = 1+*argv++;
-
-      if (strcmp(arg, "sRGB") == 0)
-         to_linear = 0;
-
-      else if (strcmp(arg, "linear") == 0)
-         to_linear = 1;
-
-      else if (strcmp(arg, "gray") == 0)
-         to_gray = 1, to_color = 0;
-
-      else if (strcmp(arg, "color") == 0)
-         to_gray = 0, to_color = 1;
-
-      else
-         usage(prog);
-   }
-
-   switch (argc)
-   {
-      default:
-         usage(prog);
-         break;
-
-      case 4:
-         c[3] = component(prog, argv[3], to_linear);
-         ++channels;
-      case 3:
-         c[2] = component(prog, argv[2], to_linear);
-         ++channels;
-      case 2:
-         c[1] = component(prog, argv[1], to_linear);
-         ++channels;
-      case 1:
-         c[0] = component(prog, argv[0], to_linear);
-         ++channels;
-         break;
-      }
-
-   if (to_linear)
-   {
-      int i;
-      int components = channels;
-
-      if ((components & 1) == 0)
-         --components;
-
-      for (i=0; i<components; ++i) c[i] = linear_from_sRGB(c[i] / 255);
-      if (components < channels)
-         c[components] = c[components] / 255;
-   }
-
-   else
-   {
-      int i;
-      for (i=0; i<4; ++i) c[i] /= 65535;
-
-      if ((channels & 1) == 0)
-      {
-         double alpha = c[channels-1];
-
-         if (alpha > 0)
-            for (i=0; i<channels-1; ++i) c[i] /= alpha;
-         else
-            for (i=0; i<channels-1; ++i) c[i] = 1;
-      }
-   }
-
-   if (to_gray)
-   {
-      if (channels < 3)
-      {
-         fprintf(stderr, "%s: too few channels (%d) for -gray\n",
-            prog, channels);
-         usage(prog);
-      }
-
-      c[0] = YfromRGB(c[0], c[1], c[2]);
-      channels -= 2;
-   }
-
-   if (to_color)
-   {
-      if (channels > 2)
-      {
-         fprintf(stderr, "%s: too many channels (%d) for -color\n",
-            prog, channels);
-         usage(prog);
-      }
-
-      c[3] = c[1]; /* alpha, if present */
-      c[2] = c[1] = c[0];
-   }
-
-   if (to_linear)
-   {
-      int i;
-      if ((channels & 1) == 0)
-      {
-         double alpha = c[channels-1];
-         for (i=0; i<channels-1; ++i) c[i] *= alpha;
-      }
-
-      for (i=0; i<channels; ++i) c[i] = nearbyint(c[i] * 65535);
-   }
-
-   else /* to sRGB */
-   {
-      int i = (channels+1)&~1;
-      while (--i >= 0)
-         c[i] = sRGB_from_linear(c[i]);
-
-      for (i=0; i<channels; ++i) c[i] = nearbyint(c[i] * 255);
-   }
-
-   {
-      int i;
-      for (i=0; i<channels; ++i) printf(" %g", c[i]);
-   }
-   printf("\n");
-
-   return 0;
-}

contrib/tools/intgamma.sh

@@ -1,110 +0,0 @@
-#!/bin/sh
-#
-# intgamma.sh
-#
-# Last changed in libpng 1.6.0 [(PENDING RELEASE)]
-#
-# COPYRIGHT: Written by John Cunningham Bowler, 2012.
-# To the extent possible under law, the author has waived all copyright and
-# related or neighboring rights to this work.  This work is published from:
-# United States.
-#
-# Shell script to generate png.c 8-bit and 16-bit log tables (see the code in
-# png.c for details).
-#
-# This script uses the "bc" arbitrary precision calculator to calculate 32-bit
-# fixed point values of logarithms appropriate to finding the log of an 8-bit
-# (0..255) value and a similar table for the exponent calculation.
-#
-# "bc" must be on the path when the script is executed, and the math library
-# (-lm) must be available
-#
-# function to print out a list of numbers as integers; the function truncates
-# the integers which must be one-per-line
-function print(){
-   awk 'BEGIN{
-      str = ""
-   }
-   {
-      sub("\\.[0-9]*$", "")
-      if ($0 == "")
-         $0 = "0"
-
-      if (str == "")
-         t = "   " $0 "U"
-      else
-         t = str ", " $0 "U"
-
-      if (length(t) >= 80) {
-         print str ","
-         str = "   " $0 "U"
-      } else
-         str = t
-   }
-   END{
-      print str
-   }'
-}
-#
-# The logarithm table.
-cat <<END
-/* 8-bit log table: png_8bit_l2[128]
- * This is a table of -log(value/255)/log(2) for 'value' in the range 128 to
- * 255, so it's the base 2 logarithm of a normalized 8-bit floating point
- * mantissa.  The numbers are 32-bit fractions.
- */
-static const png_uint_32
-png_8bit_l2[128] =
-{
-END
-#
-bc -lqws <<END | print
-f=65536*65536/l(2)
-for (i=128;i<256;++i) { .5 - l(i/255)*f; }
-END
-echo '};'
-echo
-#
-# The exponent table.
-cat <<END
-/* The 'exp()' case must invert the above, taking a 20-bit fixed point
- * logarithmic value and returning a 16 or 8-bit number as appropriate.  In
- * each case only the low 16 bits are relevant - the fraction - since the
- * integer bits (the top 4) simply determine a shift.
- *
- * The worst case is the 16-bit distinction between 65535 and 65534; this
- * requires perhaps spurious accuracy in the decoding of the logarithm to
- * distinguish log2(65535/65534.5) - 10^-5 or 17 bits.  There is little chance
- * of getting this accuracy in practice.
- *
- * To deal with this the following exp() function works out the exponent of the
- * frational part of the logarithm by using an accurate 32-bit value from the
- * top four fractional bits then multiplying in the remaining bits.
- */
-static const png_uint_32
-png_32bit_exp[16] =
-{
-END
-#
-bc -lqws <<END | print
-f=l(2)/16
-for (i=0;i<16;++i) {
-   x = .5 + e(-i*f)*2^32;
-   if (x >= 2^32) x = 2^32-1;
-   x;
-}
-END
-echo '};'
-echo
-#
-# And the table of adjustment values.
-cat <<END
-/* Adjustment table; provided to explain the numbers in the code below. */
-#if 0
-END
-bc -lqws <<END | awk '{ printf "%5d %s\n", 12-NR, $0 }'
-for (i=11;i>=0;--i){
-   (1 - e(-(2^i)/65536*l(2))) * 2^(32-i)
-}
-END
-echo '#endif'

contrib/tools/makesRGB.c

@@ -1,430 +0,0 @@
-/* makesRGB.c -- build sRGB-to-linear and linear-to-sRGB conversion tables
- *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- *
- * COPYRIGHT: Written by John Cunningham Bowler, 2012.
- * To the extent possible under law, the author has waived all copyright and
- * related or neighboring rights to this work.  This work is published from:
- * United States.
- *
- * Make a table to convert 8-bit sRGB encoding values into the closest 16-bit
- * linear value.
- *
- * Make two tables to take a linear value scaled to 255*65535 and return an
- * approximation to the 8-bit sRGB encoded value.  Calculate the error in these
- * tables and display it.
- */
-#define _C99_SOURCE 1
-#include <stdio.h>
-#include <math.h>
-#include <stdlib.h>
-
-/* pngpriv.h includes the definition of 'PNG_sRGB_FROM_LINEAR' which is required
- * to verify the actual code.
- */
-#include "../../pngpriv.h"
-
-#include "sRGB.h"
-
-/* The tables are declared 'const' in pngpriv.h, so this redefines the tables to
- * be used.
- */
-#define png_sRGB_table sRGB_table
-#define png_sRGB_base sRGB_base
-#define png_sRGB_delta sRGB_delta
-
-static png_uint_16 png_sRGB_table[256];
-static png_uint_16 png_sRGB_base[512];
-static png_byte png_sRGB_delta[512];
-
-static const unsigned int max_input = 255*65535;
-
-double
-fsRGB(double l)
-{
-   return sRGB_from_linear(l/max_input);
-}
-
-double
-sRGB(unsigned int i)
-{
-   return fsRGB(i);
-}
-
-double
-finvsRGB(unsigned int i)
-{
-   return 65535 * linear_from_sRGB(i/255.);
-}
-
-png_uint_16
-invsRGB(unsigned int i)
-{
-   unsigned int x = nearbyint(finvsRGB(i));
-
-   if (x > 65535)
-   {
-      fprintf(stderr, "invsRGB(%u) overflows to %u\n", i, x);
-      exit(1);
-   }
-
-   return (png_uint_16)x;
-}
-
-int
-main(int argc, char **argv)
-{
-   unsigned int i, i16, ibase;
-   double min_error = 0;
-   double max_error = 0;
-   double min_error16 = 0;
-   double max_error16 = 0;
-   double adjust;
-   double adjust_lo = 0.4, adjust_hi = 0.6, adjust_mid = 0.5;
-   unsigned int ec_lo = 0, ec_hi = 0, ec_mid = 0;
-   unsigned int error_count = 0;
-   unsigned int error_count16 = 0;
-   int test_only = 0;
-
-   if (argc > 1)
-      test_only = strcmp("--test", argv[1]) == 0;
-
-   /* Initialize the encoding table first. */
-   for (i=0; i<256; ++i)
-   {
-      png_sRGB_table[i] = invsRGB(i);
-   }
-
-   /* Now work out the decoding tables (this is where the error comes in because
-    * there are 512 set points and 512 straight lines between them.)
-    */
-   for (;;)
-   {
-      if (ec_lo == 0)
-         adjust = adjust_lo;
-
-      else if (ec_hi == 0)
-         adjust = adjust_hi;
-
-      else if (ec_mid == 0)
-         adjust = adjust_mid;
-
-      else if (ec_mid < ec_hi)
-         adjust = (adjust_mid + adjust_hi)/2;
-
-      else if (ec_mid < ec_lo)
-         adjust = (adjust_mid + adjust_lo)/2;
-
-      else
-      {
-         fprintf(stderr, "not reached: %u .. %u .. %u\n", ec_lo, ec_mid, ec_hi);
-         exit(1);
-      }
-
-      /* Calculate the table using the current 'adjust' */
-      for (i=0; i<=511; ++i)
-      {
-         double lo = 255 * sRGB(i << 15);
-         double hi = 255 * sRGB((i+1) << 15);
-         unsigned int calc;
-
-         calc = nearbyint((lo+adjust) * 256);
-         if (calc > 65535)
-         {
-            fprintf(stderr, "table[%d][0]: overflow %08x (%d)\n", i, calc,
-               calc);
-            exit(1);
-         }
-         png_sRGB_base[i] = calc;
-
-         calc = nearbyint((hi-lo) * 32);
-         if (calc > 255)
-         {
-            fprintf(stderr, "table[%d][1]: overflow %08x (%d)\n", i, calc,
-               calc);
-            exit(1);
-         }
-         png_sRGB_delta[i] = calc;
-      }
-
-      /* Check the 16-bit linear values alone: */
-      error_count16 = 0;
-      for (i16=0; i16 <= 65535; ++i16)
-      {
-         unsigned int i = 255*i16;
-         unsigned int iexact = nearbyint(255*sRGB(i));
-         unsigned int icalc = PNG_sRGB_FROM_LINEAR(i);
-
-         if (icalc != iexact)
-            ++error_count16;
-      }
-
-      /* Now try changing the adjustment. */
-      if (ec_lo == 0)
-         ec_lo = error_count16;
-
-      else if (ec_hi == 0)
-         ec_hi = error_count16;
-
-      else if (ec_mid == 0)
-      {
-         ec_mid = error_count16;
-         printf("/* initial error counts: %u .. %u .. %u */\n", ec_lo, ec_mid,
-            ec_hi);
-      }
-
-      else if (error_count16 < ec_mid)
-      {
-         printf("/* adjust (mid ): %f: %u -> %u */\n", adjust, ec_mid,
-            error_count16);
-         ec_mid = error_count16;
-         adjust_mid = adjust;
-      }
-
-      else if (adjust < adjust_mid && error_count16 < ec_lo)
-      {
-         printf("/* adjust (low ): %f: %u -> %u */\n", adjust, ec_lo,
-            error_count16);
-         ec_lo = error_count16;
-         adjust_lo = adjust;
-      }
-
-      else if (adjust > adjust_mid && error_count16 < ec_hi)
-      {
-         printf("/* adjust (high): %f: %u -> %u */\n", adjust, ec_hi,
-            error_count16);
-         ec_hi = error_count16;
-         adjust_hi = adjust;
-      }
-
-      else
-      {
-         adjust = adjust_mid;
-         printf("/* adjust: %f: %u */\n", adjust, ec_mid);
-         break;
-      }
-   }
-
-   /* For each entry in the table try to adjust it to minimize the error count
-    * in that entry.  Each entry corresponds to 128 input values.
-    */
-   for (ibase=0; ibase<65536; ibase+=128)
-   {
-      png_uint_16 base = png_sRGB_base[ibase >> 7], trybase = base, ob=base;
-      png_byte delta = png_sRGB_delta[ibase >> 7], trydelta = delta, od=delta;
-      unsigned int ecbase = 0, eco;
-
-      for (;;)
-      {
-         png_sRGB_base[ibase >> 7] = trybase;
-         png_sRGB_delta[ibase >> 7] = trydelta;
-
-         /* Check the 16-bit linear values alone: */
-         error_count16 = 0;
-         for (i16=ibase; i16 < ibase+128; ++i16)
-         {
-            unsigned int i = 255*i16;
-            unsigned int iexact = nearbyint(255*sRGB(i));
-            unsigned int icalc = PNG_sRGB_FROM_LINEAR(i);
-
-            if (icalc != iexact)
-               ++error_count16;
-         }
-
-         if (error_count16 == 0)
-            break;
-
-         if (ecbase == 0)
-         {
-            eco = ecbase = error_count16;
-            ++trybase; /* First test */
-         }
-
-         else if (error_count16 < ecbase)
-         {
-            if (trybase > base)
-            {
-               base = trybase;
-               ++trybase;
-            }
-            else if (trybase < base)
-            {
-               base = trybase;
-               --trybase;
-            }
-            else if (trydelta > delta)
-            {
-               delta = trydelta;
-               ++trydelta;
-            }
-            else if (trydelta < delta)
-            {
-               delta = trydelta;
-               --trydelta;
-            }
-            else
-            {
-               fprintf(stderr, "makesRGB: impossible\n");
-               exit(1);
-            }
-            ecbase = error_count16;
-         }
-
-         else
-         {
-            if (trybase > base)
-               trybase = base-1;
-            else if (trybase < base)
-            {
-               trybase = base;
-               ++trydelta;
-            }
-            else if (trydelta > delta)
-               trydelta = delta-1;
-            else if (trydelta < delta)
-               break; /* end of tests */
-         }
-      }
-
-      png_sRGB_base[ibase >> 7] = base;
-      png_sRGB_delta[ibase >> 7] = delta;
-      if (base != ob || delta != od)
-      {
-         printf("/* table[%u]={%u,%u} -> {%u,%u} %u -> %u errors */\n",
-            ibase>>7, ob, od, base, delta, eco, ecbase);
-      }
-      else if (0)
-         printf("/* table[%u]={%u,%u} %u errors */\n", ibase>>7, ob, od,
-            ecbase);
-   }
-
-   /* Only do the full (slow) test at the end: */
-   min_error = -.4999;
-   max_error = .4999;
-   error_count = 0;
-
-   for (i=0; i <= max_input; ++i)
-   {
-      unsigned int iexact = nearbyint(255*sRGB(i));
-      unsigned int icalc = PNG_sRGB_FROM_LINEAR(i);
-
-      if (icalc != iexact)
-      {
-         double err = 255*sRGB(i) - icalc;
-
-         if (err > (max_error+.001) || err < (min_error-.001))
-         {
-            printf(
-               "/* 0x%08x: exact: %3d, got: %3d [tables: %08x, %08x] (%f) */\n",
-               i, iexact, icalc, png_sRGB_base[i>>15],
-               png_sRGB_delta[i>>15], err);
-         }
-
-         ++error_count;
-         if (err > max_error)
-            max_error = err;
-         else if (err < min_error)
-            min_error = err;
-      }
-   }
-
-   /* Re-check the 16-bit cases too, including the warning if there is an error
-    * bigger than 1.
-    */
-   error_count16 = 0;
-   max_error16 = 0;
-   min_error16 = 0;
-   for (i16=0; i16 <= 65535; ++i16)
-   {
-      unsigned int i = 255*i16;
-      unsigned int iexact = nearbyint(255*sRGB(i));
-      unsigned int icalc = PNG_sRGB_FROM_LINEAR(i);
-
-      if (icalc != iexact)
-      {
-         double err = 255*sRGB(i) - icalc;
-
-         ++error_count16;
-         if (err > max_error16)
-            max_error16 = err;
-         else if (err < min_error16)
-            min_error16 = err;
-
-         if (abs(icalc - iexact) > 1)
-            printf(
-               "/* 0x%04x: exact: %3d, got: %3d [tables: %08x, %08x] (%f) */\n",
-               i16, iexact, icalc, png_sRGB_base[i>>15],
-               png_sRGB_delta[i>>15], err);
-      }
-   }
-
-   /* Check the round trip for each 8-bit sRGB value. */
-   for (i16=0; i16 <= 255; ++i16)
-   {
-      unsigned int i = 255 * png_sRGB_table[i16];
-      unsigned int iexact = nearbyint(255*sRGB(i));
-      unsigned int icalc = PNG_sRGB_FROM_LINEAR(i);
-
-      if (i16 != iexact)
-      {
-         fprintf(stderr, "8-bit rounding error: %d -> %d\n", i16, iexact);
-         exit(1);
-      }
-
-      if (icalc != i16)
-      {
-         double finv = finvsRGB(i16);
-
-         printf("/* 8-bit roundtrip error: %d -> %f -> %d(%f) */\n",
-            i16, finv, icalc, fsRGB(255*finv));
-      }
-   }
-
-
-   printf("/* error: %g - %g, %u (%g%%) of readings inexact */\n",
-      min_error, max_error, error_count, (100.*error_count)/max_input);
-   printf("/* 16-bit error: %g - %g, %u (%g%%) of readings inexact */\n",
-      min_error16, max_error16, error_count16, (100.*error_count16)/65535);
-
-   if (!test_only)
-   {
-      printf("PNG_CONST png_uint_16 png_sRGB_table[256] =\n{\n   ");
-      for (i=0; i<255; )
-      {
-         do
-         {
-            printf("%d,", png_sRGB_table[i++]);
-         }
-         while ((i & 0x7) != 0 && i<255);
-         if (i<255) printf("\n   ");
-      }
-      printf("%d\n};\n\n", png_sRGB_table[i]);
-
-
-      printf("PNG_CONST png_uint_16 png_sRGB_base[512] =\n{\n   ");
-      for (i=0; i<511; )
-      {
-         do
-         {
-            printf("%d,", png_sRGB_base[i++]);
-         }
-         while ((i & 0x7) != 0 && i<511);
-         if (i<511) printf("\n   ");
-      }
-      printf("%d\n};\n\n", png_sRGB_base[i]);
-
-      printf("PNG_CONST png_byte png_sRGB_delta[512] =\n{\n   ");
-      for (i=0; i<511; )
-      {
-         do
-         {
-            printf("%d,", png_sRGB_delta[i++]);
-         }
-         while ((i & 0xf) != 0 && i<511);
-         if (i<511) printf("\n   ");
-      }
-      printf("%d\n};\n\n", png_sRGB_delta[i]);
-   }
-
-   return 0;
-}

contrib/tools/sRGB.h

@@ -1,48 +0,0 @@
-/*-
- * sRGB.h
- *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- *
- * COPYRIGHT: Written by John Cunningham Bowler, 2012.
- * To the extent possible under law, the author has waived all copyright and
- * related or neighboring rights to this work.  This work is published from:
- * United States.
- *
- * Utility file; not actually a header, this contains definitions of sRGB
- * calculation functions for inclusion in those test programs that need them.
- *
- * All routines take and return a floating point value in the range
- * 0 to 1.0, doing a calculation according to the sRGB specification
- * (in fact the source of the numbers is the wikipedia article at
- * http://en.wikipedia.org/wiki/SRGB).
- */
-static double
-sRGB_from_linear(double l)
-{
-   if (l <= 0.0031308)
-      l *= 12.92;
-
-   else
-      l = 1.055 * pow(l, 1/2.4) - 0.055;
-
-   return l;
-}
-
-static double
-linear_from_sRGB(double s)
-{
-   if (s <= 0.04045)
-      return s / 12.92;
-
-   else
-      return pow((s+0.055)/1.055, 2.4);
-}
-
-static double
-YfromRGB(double r, double g, double b)
-{
-   /* Use the sRGB (rounded) coefficients for Rlinear, Glinear, Blinear to get
-    * the CIE Y value (also linear).
-    */
-   return 0.2126 * r + 0.7152 * g + 0.0722 * b;
-}

contrib/visupng/PngFile.c

@@ -1,19 +1,17 @@
-/*-------------------------------------
- *  PNGFILE.C -- Image File Functions
- *-------------------------------------
- *
- * Copyright 2000, Willem van Schaik.
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
+//-------------------------------------
+//  PNGFILE.C -- Image File Functions
+//-------------------------------------
+
+// Copyright 2000, Willem van Schaik.
+//
+// This code is released under the libpng license.
+// For conditions of distribution and use, see the disclaimer
+// and license in png.h
 
 #include <windows.h>
 #include <commdlg.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <zlib.h>
 
 #include "png.h"
 #include "pngfile.h"
@@ -30,14 +28,14 @@ static png_structp png_ptr = NULL;
 static png_infop info_ptr = NULL;
 
 
-/* cexcept interface */
+// cexcept interface
 
 static void
 png_cexcept_error(png_structp png_ptr, png_const_charp msg)
 {
    if(png_ptr)
      ;
-#ifdef PNG_CONSOLE_IO_SUPPORTED
+#ifndef PNG_NO_CONSOLE_IO
    fprintf(stderr, "libpng error: %s\n", msg);
 #endif
    {
@@ -45,7 +43,7 @@ png_cexcept_error(png_structp png_ptr, png_const_charp msg)
    }
 }
 
-/* Windows open-file functions */
+// Windows open-file functions
 
 void PngFileInitialize (HWND hwnd)
 {
@@ -59,13 +57,13 @@ void PngFileInitialize (HWND hwnd)
     ofn.lpstrCustomFilter = NULL;
     ofn.nMaxCustFilter    = 0;
     ofn.nFilterIndex      = 0;
-    ofn.lpstrFile         = NULL;          /* Set in Open and Close functions */
+    ofn.lpstrFile         = NULL;          // Set in Open and Close functions
     ofn.nMaxFile          = MAX_PATH;
-    ofn.lpstrFileTitle    = NULL;          /* Set in Open and Close functions */
+    ofn.lpstrFileTitle    = NULL;          // Set in Open and Close functions
     ofn.nMaxFileTitle     = MAX_PATH;
     ofn.lpstrInitialDir   = NULL;
     ofn.lpstrTitle        = NULL;
-    ofn.Flags             = 0;             /* Set in Open and Close functions */
+    ofn.Flags             = 0;             // Set in Open and Close functions
     ofn.nFileOffset       = 0;
     ofn.nFileExtension    = 0;
     ofn.lpstrDefExt       = TEXT ("png");
@@ -94,7 +92,7 @@ BOOL PngFileSaveDlg (HWND hwnd, PTSTR pstrFileName, PTSTR pstrTitleName)
     return GetSaveFileName (&ofn);
 }
 
-/* PNG image handler functions */
+// PNG image handler functions
 
 BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData,
                    int *piWidth, int *piHeight, int *piChannels, png_color *pBkgColor)
@@ -111,7 +109,7 @@ BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData,
     static png_byte   **ppbRowPointers = NULL;
     int                 i;
 
-    /* open the PNG input file */
+    // open the PNG input file
 
     if (!pstrFileName)
     {
@@ -125,7 +123,7 @@ BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData,
         return FALSE;
     }
 
-    /* first check the eight byte PNG signature */
+    // first check the eight byte PNG signature
 
     fread(pbSig, 1, 8, pfFile);
     if (png_sig_cmp(pbSig, 0, 8))
@@ -134,7 +132,7 @@ BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData,
         return FALSE;
     }
 
-    /* create the two png(-info) structures */
+    // create the two png(-info) structures
 
     png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL,
       (png_error_ptr)png_cexcept_error, (png_error_ptr)NULL);
@@ -154,37 +152,31 @@ BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData,
 
     Try
     {
-
-        /* initialize the png structure */
-
-#ifdef PNG_STDIO_SUPPORTED
+        
+        // initialize the png structure
+        
+#if !defined(PNG_NO_STDIO)
         png_init_io(png_ptr, pfFile);
 #else
         png_set_read_fn(png_ptr, (png_voidp)pfFile, png_read_data);
 #endif
-
+        
         png_set_sig_bytes(png_ptr, 8);
-
-        /* read all PNG info up to image data */
-
+        
+        // read all PNG info up to image data
+        
         png_read_info(png_ptr, info_ptr);
-
-        /* get width, height, bit-depth and color-type */
-
+        
+        // get width, height, bit-depth and color-type
+        
         png_get_IHDR(png_ptr, info_ptr, piWidth, piHeight, &iBitDepth,
             &iColorType, NULL, NULL, NULL);
-
-        /* expand images of all color-type and bit-depth to 3x8-bit RGB */
-        /* let the library process alpha, transparency, background, etc. */
-
-#ifdef PNG_READ_16_TO_8_SUPPORTED
-    if (iBitDepth == 16)
-#  ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
-        png_set_scale_16(png_ptr);
-#  else
-        png_set_strip_16(png_ptr);
-#  endif
-#endif
+        
+        // expand images of all color-type and bit-depth to 3x8 bit RGB images
+        // let the library process things like alpha, transparency, background
+        
+        if (iBitDepth == 16)
+            png_set_strip_16(png_ptr);
         if (iColorType == PNG_COLOR_TYPE_PALETTE)
             png_set_expand(png_ptr);
         if (iBitDepth < 8)
@@ -194,8 +186,8 @@ BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData,
         if (iColorType == PNG_COLOR_TYPE_GRAY ||
             iColorType == PNG_COLOR_TYPE_GRAY_ALPHA)
             png_set_gray_to_rgb(png_ptr);
-
-        /* set the background color to draw transparent and alpha images over */
+        
+        // set the background color to draw transparent and alpha images over.
         if (png_get_bKGD(png_ptr, info_ptr, &pBackground))
         {
             png_set_background(png_ptr, pBackground, PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
@@ -207,30 +199,30 @@ BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData,
         {
             pBkgColor = NULL;
         }
-
-        /* if required set gamma conversion */
+        
+        // if required set gamma conversion
         if (png_get_gAMA(png_ptr, info_ptr, &dGamma))
             png_set_gamma(png_ptr, (double) 2.2, dGamma);
-
-        /* after the transformations are registered, update info_ptr data */
-
+        
+        // after the transformations have been registered update info_ptr data
+        
         png_read_update_info(png_ptr, info_ptr);
-
-        /* get again width, height and the new bit-depth and color-type */
-
+        
+        // get again width, height and the new bit-depth and color-type
+        
         png_get_IHDR(png_ptr, info_ptr, piWidth, piHeight, &iBitDepth,
             &iColorType, NULL, NULL, NULL);
-
-
-        /* row_bytes is the width x number of channels */
-
+        
+        
+        // row_bytes is the width x number of channels
+        
         ulRowBytes = png_get_rowbytes(png_ptr, info_ptr);
         ulChannels = png_get_channels(png_ptr, info_ptr);
-
+        
         *piChannels = ulChannels;
-
-        /* now we can allocate memory to store the image */
-
+        
+        // now we can allocate memory to store the image
+        
         if (pbImageData)
         {
             free (pbImageData);
@@ -242,34 +234,34 @@ BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData,
             png_error(png_ptr, "Visual PNG: out of memory");
         }
         *ppbImageData = pbImageData;
-
-        /* and allocate memory for an array of row-pointers */
-
+        
+        // and allocate memory for an array of row-pointers
+        
         if ((ppbRowPointers = (png_bytepp) malloc((*piHeight)
                             * sizeof(png_bytep))) == NULL)
         {
             png_error(png_ptr, "Visual PNG: out of memory");
         }
-
-        /* set the individual row-pointers to point at the correct offsets */
-
+        
+        // set the individual row-pointers to point at the correct offsets
+        
         for (i = 0; i < (*piHeight); i++)
             ppbRowPointers[i] = pbImageData + i * ulRowBytes;
-
-        /* now we can go ahead and just read the whole image */
-
+        
+        // now we can go ahead and just read the whole image
+        
         png_read_image(png_ptr, ppbRowPointers);
-
-        /* read the additional chunks in the PNG file (not really needed) */
-
+        
+        // read the additional chunks in the PNG file (not really needed)
+        
         png_read_end(png_ptr, NULL);
-
-        /* and we're done */
-
+        
+        // and we're done
+        
         free (ppbRowPointers);
         ppbRowPointers = NULL;
-
-        /* yepp, done */
+        
+        // yepp, done
     }
 
     Catch (msg)
@@ -277,7 +269,7 @@ BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData,
         png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
 
         *ppbImageData = pbImageData = NULL;
-
+        
         if(ppbRowPointers)
             free (ppbRowPointers);
 
@@ -303,7 +295,7 @@ BOOL PngSaveImage (PTSTR pstrFileName, png_byte *pDiData,
     static png_byte   **ppbRowPointers = NULL;
     int                 i;
 
-    /* open the PNG output file */
+    // open the PNG output file
 
     if (!pstrFileName)
         return FALSE;
@@ -311,7 +303,7 @@ BOOL PngSaveImage (PTSTR pstrFileName, png_byte *pDiData,
     if (!(pfFile = fopen(pstrFileName, "wb")))
         return FALSE;
 
-    /* prepare the standard PNG structures */
+    // prepare the standard PNG structures
 
     png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL,
       (png_error_ptr)png_cexcept_error, (png_error_ptr)NULL);
@@ -330,60 +322,60 @@ BOOL PngSaveImage (PTSTR pstrFileName, png_byte *pDiData,
 
     Try
     {
-        /* initialize the png structure */
-
-#ifdef PNG_STDIO_SUPPORTED
+        // initialize the png structure
+        
+#if !defined(PNG_NO_STDIO)
         png_init_io(png_ptr, pfFile);
 #else
         png_set_write_fn(png_ptr, (png_voidp)pfFile, png_write_data, png_flush);
 #endif
-
-        /* we're going to write a very simple 3x8-bit RGB image */
-
+        
+        // we're going to write a very simple 3x8 bit RGB image
+        
         png_set_IHDR(png_ptr, info_ptr, iWidth, iHeight, ciBitDepth,
             PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE,
             PNG_FILTER_TYPE_BASE);
-
-        /* write the file header information */
-
+        
+        // write the file header information
+        
         png_write_info(png_ptr, info_ptr);
-
-        /* swap the BGR pixels in the DiData structure to RGB */
-
+        
+        // swap the BGR pixels in the DiData structure to RGB
+        
         png_set_bgr(png_ptr);
-
-        /* row_bytes is the width x number of channels */
-
+        
+        // row_bytes is the width x number of channels
+        
         ulRowBytes = iWidth * ciChannels;
-
-        /* we can allocate memory for an array of row-pointers */
-
+        
+        // we can allocate memory for an array of row-pointers
+        
         if ((ppbRowPointers = (png_bytepp) malloc(iHeight * sizeof(png_bytep))) == NULL)
             Throw "Visualpng: Out of memory";
-
-        /* set the individual row-pointers to point at the correct offsets */
-
+        
+        // set the individual row-pointers to point at the correct offsets
+        
         for (i = 0; i < iHeight; i++)
             ppbRowPointers[i] = pDiData + i * (((ulRowBytes + 3) >> 2) << 2);
-
-        /* write out the entire image data in one call */
-
+        
+        // write out the entire image data in one call
+        
         png_write_image (png_ptr, ppbRowPointers);
-
-        /* write the additional chunks to the PNG file (not really needed) */
-
+        
+        // write the additional chunks to the PNG file (not really needed)
+        
         png_write_end(png_ptr, info_ptr);
-
-        /* and we're done */
-
+        
+        // and we're done
+        
         free (ppbRowPointers);
         ppbRowPointers = NULL;
-
-        /* clean up after the write, and free any memory allocated */
-
+        
+        // clean up after the write, and free any memory allocated
+        
         png_destroy_write_struct(&png_ptr, (png_infopp) NULL);
-
-        /* yepp, done */
+        
+        // yepp, done
     }
 
     Catch (msg)
@@ -397,13 +389,13 @@ BOOL PngSaveImage (PTSTR pstrFileName, png_byte *pDiData,
 
         return FALSE;
     }
-
+    
     fclose (pfFile);
-
+    
     return TRUE;
 }
 
-#ifndef PNG_STDIO_SUPPORTED
+#ifdef PNG_NO_STDIO
 
 static void
 png_read_data(png_structp png_ptr, png_bytep data, png_size_t length)
@@ -445,7 +437,6 @@ png_flush(png_structp png_ptr)
 
 #endif
 
-/*-----------------
- *  end of source
- *-----------------
- */
+//-----------------
+//  end of source
+//-----------------

contrib/visupng/PngFile.h

@@ -1,12 +1,12 @@
-/*------------------------------------------*/
-/*  PNGFILE.H -- Header File for pngfile.c*/
-/*------------------------------------------*/
+//------------------------------------------
+//  PNGFILE.H -- Header File for pngfile.c
+//------------------------------------------
 
-/* Copyright 2000, Willem van Schaik.*/
+// Copyright 2000, Willem van Schaik.
 
-/* This code is released under the libpng license.*/
-/* For conditions of distribution and use, see the disclaimer*/
-/* and license in png.h*/
+// This code is released under the libpng license.
+// For conditions of distribution and use, see the disclaimer
+// and license in png.h
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -22,7 +22,7 @@ BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData,
 BOOL PngSaveImage (PTSTR pstrFileName, png_byte *pDiData,
                    int iWidth, int iHeight, png_color BkgColor);
 
-#ifndef PNG_STDIO_SUPPORTED
+#if defined(PNG_NO_STDIO)
 static void png_read_data(png_structp png_ptr, png_bytep data, png_size_t length);
 static void png_write_data(png_structp png_ptr, png_bytep data, png_size_t length);
 static void png_flush(png_structp png_ptr);

contrib/visupng/README.txt

@@ -8,8 +8,8 @@ For conditions of distribution and use, see the disclaimer
 and license in png.h
 
 As a PNG .dll demo VisualPng is finished. More features would only hinder
-the program's objective. However, further extensions (like support for other
-graphics formats) are in development. To get these, or for pre-compiled
+the program's objective. However, further extensions (like support for other 
+graphics formats) are in development. To get these, or for pre-compiled 
 binaries, go to "http://www.schaik.com/png/visualpng.html".
 
 ------------------------------------------------------------------------

contrib/visupng/VisualPng.c

@@ -1,43 +1,41 @@
-/*------------------------------------
- *  VisualPng.C -- Shows a PNG image
- *------------------------------------
- *
- * Copyright 2000, Willem van Schaik.
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
+//------------------------------------
+//  VisualPng.C -- Shows a PNG image
+//------------------------------------
 
-/* switches */
+// Copyright 2000, Willem van Schaik.
 
-/* defines */
+// This code is released under the libpng license.
+// For conditions of distribution and use, see the disclaimer
+// and license in png.h
+
+// switches
+
+// defines
 
 #define PROGNAME  "VisualPng"
 #define LONGNAME  "Win32 Viewer for PNG-files"
 #define VERSION   "1.0 of 2000 June 07"
 
-/* constants */
+// constants
 
 #define MARGIN 8
 
-/* standard includes */
+// standard includes
 
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <windows.h>
-#include <zlib.h>
 
-/* application includes */
+// application includes
 
 #include "png.h"
 #include "pngfile.h"
 #include "resource.h"
 
-/* macros */
+// macros
 
-/* function prototypes */
+// function prototypes
 
 LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM);
 BOOL    CALLBACK AboutDlgProc (HWND, UINT, WPARAM, LPARAM) ;
@@ -67,14 +65,14 @@ BOOL FillBitmap (
         BYTE *pbImage, int cxImgSize, int cyImgSize, int cImgChannels,
         BOOL bStretched);
 
-/* a few global variables */
+// a few global variables
 
 static char *szProgName = PROGNAME;
 static char *szAppName = LONGNAME;
 static char *szIconName = PROGNAME;
 static char szCmdFileName [MAX_PATH];
 
-/* MAIN routine */
+// MAIN routine
 
 int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
                     PSTR szCmdLine, int iCmdShow)
@@ -92,7 +90,7 @@ int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
     wndclass.hInstance     = hInstance;
     wndclass.hIcon         = LoadIcon (hInstance, szIconName) ;
     wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW);
-    wndclass.hbrBackground = NULL; /* (HBRUSH) GetStockObject (GRAY_BRUSH); */
+    wndclass.hbrBackground = NULL; // (HBRUSH) GetStockObject (GRAY_BRUSH);
     wndclass.lpszMenuName  = szProgName;
     wndclass.lpszClassName = szProgName;
 
@@ -103,7 +101,7 @@ int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
         return 0;
     }
 
-    /* if filename given on commandline, store it */
+    // if filename given on commandline, store it
     if ((szCmdLine != NULL) && (*szCmdLine != '\0'))
         if (szCmdLine[0] == '"')
             strncpy (szCmdFileName, szCmdLine + 1, strlen(szCmdLine) - 2);
@@ -112,20 +110,20 @@ int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
     else
         strcpy (szCmdFileName, "");
 
-    /* calculate size of window-borders */
+    // calculate size of window-borders
     ixBorders = 2 * (GetSystemMetrics (SM_CXBORDER) +
                      GetSystemMetrics (SM_CXDLGFRAME));
     iyBorders = 2 * (GetSystemMetrics (SM_CYBORDER) +
                      GetSystemMetrics (SM_CYDLGFRAME)) +
                      GetSystemMetrics (SM_CYCAPTION) +
                      GetSystemMetrics (SM_CYMENUSIZE) +
-                     1; /* WvS: don't ask me why?  */
+                     1; /* WvS: don't ask me why? */
 
     hwnd = CreateWindow (szProgName, szAppName,
         WS_OVERLAPPEDWINDOW,
         CW_USEDEFAULT, CW_USEDEFAULT,
         512 + 2 * MARGIN + ixBorders, 384 + 2 * MARGIN + iyBorders,
-/*      CW_USEDEFAULT, CW_USEDEFAULT, */
+//      CW_USEDEFAULT, CW_USEDEFAULT,
         NULL, NULL, hInstance, NULL);
 
     ShowWindow (hwnd, iCmdShow);
@@ -182,29 +180,29 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,
 
         strcpy (szImgPathName, "");
 
-        /* in case we process file given on command-line */
+        // in case we process file given on command-line
 
         if (szCmdFileName[0] != '\0')
         {
             strcpy (szImgPathName, szCmdFileName);
 
-            /* read the other png-files in the directory for later */
-            /* next/previous commands */
+            // read the other png-files in the directory for later
+            // next/previous commands
 
             BuildPngList (szImgPathName, &pPngFileList, &iPngFileCount,
                           &iPngFileIndex);
 
-            /* load the image from file */
+            // load the image from file
 
             if (!LoadImageFile (hwnd, szImgPathName,
                 &pbImage, &cxImgSize, &cyImgSize, &cImgChannels, &bkgColor))
                 return 0;
 
-            /* invalidate the client area for later update */
+            // invalidate the client area for later update
 
             InvalidateRect (hwnd, NULL, TRUE);
 
-            /* display the PNG into the DIBitmap */
+            // display the PNG into the DIBitmap
 
             DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize,
                 pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched);
@@ -216,11 +214,11 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,
         cxWinSize = LOWORD (lParam);
         cyWinSize = HIWORD (lParam);
 
-        /* invalidate the client area for later update */
+        // invalidate the client area for later update
 
         InvalidateRect (hwnd, NULL, TRUE);
 
-        /* display the PNG into the DIBitmap */
+        // display the PNG into the DIBitmap
 
         DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize,
             pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched);
@@ -244,28 +242,28 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,
         {
         case IDM_FILE_OPEN:
 
-            /* show the File Open dialog box */
+            // show the File Open dialog box
 
             if (!PngFileOpenDlg (hwnd, szImgPathName, szTitleName))
                 return 0;
 
-            /* read the other png-files in the directory for later */
-            /* next/previous commands */
+            // read the other png-files in the directory for later
+            // next/previous commands
 
             BuildPngList (szImgPathName, &pPngFileList, &iPngFileCount,
                           &iPngFileIndex);
 
-            /* load the image from file */
+            // load the image from file
 
             if (!LoadImageFile (hwnd, szImgPathName,
                 &pbImage, &cxImgSize, &cyImgSize, &cImgChannels, &bkgColor))
                 return 0;
 
-            /* invalidate the client area for later update */
+            // invalidate the client area for later update
 
             InvalidateRect (hwnd, NULL, TRUE);
 
-            /* display the PNG into the DIBitmap */
+            // display the PNG into the DIBitmap
 
             DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize,
                 pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched);
@@ -274,12 +272,12 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,
 
         case IDM_FILE_SAVE:
 
-            /* show the File Save dialog box */
+            // show the File Save dialog box
 
             if (!PngFileSaveDlg (hwnd, szImgPathName, szTitleName))
                 return 0;
 
-            /* save the PNG to a disk file */
+            // save the PNG to a disk file
 
             SetCursor (LoadCursor (NULL, IDC_WAIT));
             ShowCursor (TRUE);
@@ -297,55 +295,55 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,
 
         case IDM_FILE_NEXT:
 
-            /* read next entry in the directory */
+            // read next entry in the directory
 
             if (SearchPngList (pPngFileList, iPngFileCount, &iPngFileIndex,
                 NULL, szImgPathName))
             {
                 if (strcmp (szImgPathName, "") == 0)
                     return 0;
-
-                /* load the image from file */
-
+                
+                // load the image from file
+                
                 if (!LoadImageFile (hwnd, szImgPathName, &pbImage,
                         &cxImgSize, &cyImgSize, &cImgChannels, &bkgColor))
                     return 0;
-
-                /* invalidate the client area for later update */
-
+                
+                // invalidate the client area for later update
+                
                 InvalidateRect (hwnd, NULL, TRUE);
-
-                /* display the PNG into the DIBitmap */
-
+                
+                // display the PNG into the DIBitmap
+                
                 DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize,
                     pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched);
             }
-
+            
             return 0;
 
         case IDM_FILE_PREVIOUS:
 
-            /* read previous entry in the directory */
+            // read previous entry in the directory
 
             if (SearchPngList (pPngFileList, iPngFileCount, &iPngFileIndex,
                 szImgPathName, NULL))
             {
-
+                
                 if (strcmp (szImgPathName, "") == 0)
                     return 0;
-
-                /* load the image from file */
-
+                
+                // load the image from file
+                
                 if (!LoadImageFile (hwnd, szImgPathName, &pbImage, &cxImgSize,
                     &cyImgSize, &cImgChannels, &bkgColor))
                     return 0;
-
-                /* invalidate the client area for later update */
-
+                
+                // invalidate the client area for later update
+                
                 InvalidateRect (hwnd, NULL, TRUE);
-
-                /* display the PNG into the DIBitmap */
-
+                
+                // display the PNG into the DIBitmap
+                
                 DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize,
                     pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched);
             }
@@ -354,9 +352,9 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,
 
         case IDM_FILE_EXIT:
 
-            /* more cleanup needed... */
+            // more cleanup needed...
 
-            /* free image buffer */
+            // free image buffer
 
             if (pDib != NULL)
             {
@@ -364,7 +362,7 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,
                 pDib = NULL;
             }
 
-            /* free file-list */
+            // free file-list
 
             if (pPngFileList != NULL)
             {
@@ -372,7 +370,7 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,
                 pPngFileList = NULL;
             }
 
-            /* let's go ... */
+            // let's go ...
 
             exit (0);
 
@@ -385,11 +383,11 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,
             else
                 CheckMenuItem (hMenu, IDM_OPTIONS_STRETCH, MF_UNCHECKED);
 
-            /* invalidate the client area for later update */
+            // invalidate the client area for later update
 
             InvalidateRect (hwnd, NULL, TRUE);
 
-            /* display the PNG into the DIBitmap */
+            // display the PNG into the DIBitmap
 
             DisplayImage (hwnd, &pDib, &pDiData, cxWinSize, cyWinSize,
                 pbImage, cxImgSize, cyImgSize, cImgChannels, bStretched);
@@ -400,7 +398,7 @@ LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam,
             DialogBox (hInstance, TEXT ("AboutBox"), hwnd, AboutDlgProc) ;
             return 0;
 
-        } /* end switch */
+        } // end switch
 
         break;
 
@@ -452,10 +450,10 @@ BOOL CALLBACK AboutDlgProc (HWND hDlg, UINT message,
      return FALSE ;
 }
 
-/*---------------
- *  CenterAbout
- *---------------
- */
+//---------------
+//  CenterAbout
+//---------------
+
 BOOL CenterAbout (HWND hwndChild, HWND hwndParent)
 {
    RECT    rChild, rParent, rWorkArea;
@@ -463,19 +461,19 @@ BOOL CenterAbout (HWND hwndChild, HWND hwndParent)
    int     xNew, yNew;
    BOOL  bResult;
 
-   /* Get the Height and Width of the child window */
+   // Get the Height and Width of the child window
    GetWindowRect (hwndChild, &rChild);
    wChild = rChild.right - rChild.left;
    hChild = rChild.bottom - rChild.top;
 
-   /* Get the Height and Width of the parent window */
+   // Get the Height and Width of the parent window
    GetWindowRect (hwndParent, &rParent);
    wParent = rParent.right - rParent.left;
    hParent = rParent.bottom - rParent.top;
 
-   /* Get the limits of the 'workarea' */
+   // Get the limits of the 'workarea'
    bResult = SystemParametersInfo(
-      SPI_GETWORKAREA,  /* system parameter to query or set */
+      SPI_GETWORKAREA,  // system parameter to query or set
       sizeof(RECT),
       &rWorkArea,
       0);
@@ -485,7 +483,7 @@ BOOL CenterAbout (HWND hwndChild, HWND hwndParent)
       rWorkArea.bottom = GetSystemMetrics(SM_CYSCREEN);
    }
 
-   /* Calculate new X position, then adjust for workarea */
+   // Calculate new X position, then adjust for workarea
    xNew = rParent.left + ((wParent - wChild) /2);
    if (xNew < rWorkArea.left) {
       xNew = rWorkArea.left;
@@ -493,7 +491,7 @@ BOOL CenterAbout (HWND hwndChild, HWND hwndParent)
       xNew = rWorkArea.right - wChild;
    }
 
-   /* Calculate new Y position, then adjust for workarea */
+   // Calculate new Y position, then adjust for workarea
    yNew = rParent.top  + ((hParent - hChild) /2);
    if (yNew < rWorkArea.top) {
       yNew = rWorkArea.top;
@@ -501,15 +499,15 @@ BOOL CenterAbout (HWND hwndChild, HWND hwndParent)
       yNew = rWorkArea.bottom - hChild;
    }
 
-   /* Set it, and return */
+   // Set it, and return
    return SetWindowPos (hwndChild, NULL, xNew, yNew, 0, 0, SWP_NOSIZE |
           SWP_NOZORDER);
 }
 
-/*----------------
- *  BuildPngList
- *----------------
- */
+//----------------
+//  BuildPngList
+//----------------
+
 BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount,
      int *pFileIndex)
 {
@@ -525,7 +523,7 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount,
     int                       i, ii;
     int                       j, jj;
 
-    /* free previous file-list */
+    // free previous file-list
 
     if (*ppFileList != NULL)
     {
@@ -533,7 +531,7 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount,
         *ppFileList = NULL;
     }
 
-    /* extract foldername, filename and search-name */
+    // extract foldername, filename and search-name
 
     strcpy (szImgPathName, pstrPathName);
     strcpy (szImgFileName, strrchr (pstrPathName, '\\') + 1);
@@ -542,7 +540,7 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount,
     *(strrchr (szImgFindName, '\\') + 1) = '\0';
     strcat (szImgFindName, "*.png");
 
-    /* first cycle: count number of files in directory for memory allocation */
+    // first cycle: count number of files in directory for memory allocation
 
     *pFileCount = 0;
 
@@ -556,11 +554,11 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount,
     }
     FindClose(hFind);
 
-    /* allocation memory for file-list */
+    // allocation memory for file-list
 
     *ppFileList = (TCHAR *) malloc (*pFileCount * MAX_PATH);
 
-    /* second cycle: read directory and store filenames in file-list */
+    // second cycle: read directory and store filenames in file-list
 
     hFind = FindFirstFile(szImgFindName, &finddata);
     bOk = (hFind != (HANDLE) -1);
@@ -582,7 +580,7 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount,
     }
     FindClose(hFind);
 
-    /* finally we must sort the file-list */
+    // finally we must sort the file-list
 
     for (i = 0; i < *pFileCount - 1; i++)
     {
@@ -596,7 +594,7 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount,
                 strcpy (*ppFileList + jj, *ppFileList + ii);
                 strcpy (*ppFileList + ii, szTmp);
 
-                /* check if this was the current image that we moved */
+                // check if this was the current image that we moved
 
                 if (*pFileIndex == i)
                     *pFileIndex = j;
@@ -610,10 +608,9 @@ BOOL BuildPngList (PTSTR pstrPathName, TCHAR **ppFileList, int *pFileCount,
     return TRUE;
 }
 
-/*----------------
- *  SearchPngList
- *----------------
- */
+//----------------
+//  SearchPngList
+//----------------
 
 BOOL SearchPngList (
         TCHAR *pFileList, int FileCount, int *pFileIndex,
@@ -621,30 +618,30 @@ BOOL SearchPngList (
 {
     if (FileCount > 0)
     {
-        /* get previous entry */
-
+        // get previous entry
+        
         if (pstrPrevName != NULL)
         {
             if (*pFileIndex > 0)
                 *pFileIndex -= 1;
             else
                 *pFileIndex = FileCount - 1;
-
+            
             strcpy (pstrPrevName, pFileList + (*pFileIndex * MAX_PATH));
         }
-
-        /* get next entry */
-
+        
+        // get next entry
+        
         if (pstrNextName != NULL)
         {
             if (*pFileIndex < FileCount - 1)
                 *pFileIndex += 1;
             else
                 *pFileIndex = 0;
-
+            
             strcpy (pstrNextName, pFileList + (*pFileIndex * MAX_PATH));
         }
-
+        
         return TRUE;
     }
     else
@@ -653,10 +650,9 @@ BOOL SearchPngList (
     }
 }
 
-/*-----------------
- *  LoadImageFile
- *-----------------
- */
+//-----------------
+//  LoadImageFile
+//-----------------
 
 BOOL LoadImageFile (HWND hwnd, PTSTR pstrPathName,
                 png_byte **ppbImage, int *pxImgSize, int *pyImgSize,
@@ -664,7 +660,7 @@ BOOL LoadImageFile (HWND hwnd, PTSTR pstrPathName,
 {
     static TCHAR szTmp [MAX_PATH];
 
-    /* if there's an existing PNG, free the memory */
+    // if there's an existing PNG, free the memory
 
     if (*ppbImage)
     {
@@ -672,7 +668,7 @@ BOOL LoadImageFile (HWND hwnd, PTSTR pstrPathName,
         *ppbImage = NULL;
     }
 
-    /* Load the entire PNG into memory */
+    // Load the entire PNG into memory
 
     SetCursor (LoadCursor (NULL, IDC_WAIT));
     ShowCursor (TRUE);
@@ -698,10 +694,10 @@ BOOL LoadImageFile (HWND hwnd, PTSTR pstrPathName,
     return TRUE;
 }
 
-/*----------------
- *  DisplayImage
- *----------------
- */
+//----------------
+//  DisplayImage
+//----------------
+
 BOOL DisplayImage (HWND hwnd, BYTE **ppDib,
         BYTE **ppDiData, int cxWinSize, int cyWinSize,
         BYTE *pbImage, int cxImgSize, int cyImgSize, int cImgChannels,
@@ -709,14 +705,14 @@ BOOL DisplayImage (HWND hwnd, BYTE **ppDib,
 {
     BYTE                       *pDib = *ppDib;
     BYTE                       *pDiData = *ppDiData;
-    /* BITMAPFILEHEADER        *pbmfh; */
+    // BITMAPFILEHEADER        *pbmfh;
     BITMAPINFOHEADER           *pbmih;
     WORD                        wDIRowBytes;
     png_color                   bkgBlack = {0, 0, 0};
     png_color                   bkgGray  = {127, 127, 127};
     png_color                   bkgWhite = {255, 255, 255};
 
-    /* allocate memory for the Device Independant bitmap */
+    // allocate memory for the Device Independant bitmap
 
     wDIRowBytes = (WORD) ((3 * cxWinSize + 3L) >> 2) << 2;
 
@@ -737,7 +733,7 @@ BOOL DisplayImage (HWND hwnd, BYTE **ppDib,
     *ppDib = pDib;
     memset (pDib, 0, sizeof(BITMAPINFOHEADER));
 
-    /* initialize the dib-structure */
+    // initialize the dib-structure
 
     pbmih = (BITMAPINFOHEADER *) pDib;
     pbmih->biSize = sizeof(BITMAPINFOHEADER);
@@ -749,11 +745,11 @@ BOOL DisplayImage (HWND hwnd, BYTE **ppDib,
     pDiData = pDib + sizeof(BITMAPINFOHEADER);
     *ppDiData = pDiData;
 
-    /* first fill bitmap with gray and image border */
+    // first fill bitmap with gray and image border
 
     InitBitmap (pDiData, cxWinSize, cyWinSize);
 
-    /* then fill bitmap with image */
+    // then fill bitmap with image
 
     if (pbImage)
     {
@@ -766,16 +762,16 @@ BOOL DisplayImage (HWND hwnd, BYTE **ppDib,
     return TRUE;
 }
 
-/*--------------
- *  InitBitmap
- *--------------
- */
+//--------------
+//  InitBitmap
+//--------------
+
 BOOL InitBitmap (BYTE *pDiData, int cxWinSize, int cyWinSize)
 {
     BYTE *dst;
     int x, y, col;
 
-    /* initialize the background with gray */
+    // initialize the background with gray
 
     dst = pDiData;
     for (y = 0; y < cyWinSize; y++)
@@ -783,13 +779,13 @@ BOOL InitBitmap (BYTE *pDiData, int cxWinSize, int cyWinSize)
         col = 0;
         for (x = 0; x < cxWinSize; x++)
         {
-            /* fill with GRAY */
+            // fill with GRAY
             *dst++ = 127;
             *dst++ = 127;
             *dst++ = 127;
             col += 3;
         }
-        /* rows start on 4 byte boundaries */
+        // rows start on 4 byte boundaries
         while ((col % 4) != 0)
         {
             dst++;
@@ -800,10 +796,10 @@ BOOL InitBitmap (BYTE *pDiData, int cxWinSize, int cyWinSize)
     return TRUE;
 }
 
-/*--------------
- *  FillBitmap
- *--------------
- */
+//--------------
+//  FillBitmap
+//--------------
+
 BOOL FillBitmap (
         BYTE *pDiData, int cxWinSize, int cyWinSize,
         BYTE *pbImage, int cxImgSize, int cyImgSize, int cImgChannels,
@@ -828,12 +824,11 @@ BOOL FillBitmap (
         cxNewSize = cxWinSize - 2 * MARGIN;
         cyNewSize = cyWinSize - 2 * MARGIN;
 
-        /* stretch the image to it's window determined size */
+        // stretch the image to it's window determined size
 
-        /* the following two are mathematically the same, but the first
-         * has side-effects because of rounding
-         */
-/*      if ((cyNewSize / cxNewSize) > (cyImgSize / cxImgSize)) */
+        // the following two are the same, but the first has side-effects
+        // because of rounding
+//      if ((cyNewSize / cxNewSize) > (cyImgSize / cxImgSize))
         if ((cyNewSize * cxImgSize) > (cyImgSize * cxNewSize))
         {
             cyNewSize = cxNewSize * cyImgSize / cxImgSize;
@@ -872,12 +867,12 @@ BOOL FillBitmap (
             }
         }
 
-        /* calculate row-bytes */
+        // calculate row-bytes
 
         wImgRowBytes = cImgChannels * cxNewSize;
         wDIRowBytes = (WORD) ((cDIChannels * cxWinSize + 3L) >> 2) << 2;
 
-        /* copy image to screen */
+        // copy image to screen
 
         for (yImg = 0, yWin = cyImgPos; yImg < cyNewSize; yImg++, yWin++)
         {
@@ -893,7 +888,7 @@ BOOL FillBitmap (
                 r = *src++;
                 g = *src++;
                 b = *src++;
-                *dst++ = b; /* note the reverse order  */
+                *dst++ = b; /* note the reverse order */
                 *dst++ = g;
                 *dst++ = r;
                 if (cImgChannels == 4)
@@ -903,7 +898,7 @@ BOOL FillBitmap (
             }
         }
 
-        /* free memory */
+        // free memory
 
         if (pStretchedImage != NULL)
         {
@@ -913,28 +908,28 @@ BOOL FillBitmap (
 
     }
 
-    /* process the image not-stretched */
+    // process the image not-stretched
 
     else
     {
-        /* calculate the central position */
+        // calculate the central position
 
         cxImgPos = (cxWinSize - cxImgSize) / 2;
         cyImgPos = (cyWinSize - cyImgSize) / 2;
 
-        /* check for image larger than window */
+        // check for image larger than window
 
         if (cxImgPos < MARGIN)
             cxImgPos = MARGIN;
         if (cyImgPos < MARGIN)
             cyImgPos = MARGIN;
 
-        /* calculate both row-bytes */
+        // calculate both row-bytes
 
         wImgRowBytes = cImgChannels * cxImgSize;
         wDIRowBytes = (WORD) ((cDIChannels * cxWinSize + 3L) >> 2) << 2;
 
-        /* copy image to screen */
+        // copy image to screen
 
         for (yImg = 0, yWin = cyImgPos; yImg < cyImgSize; yImg++, yWin++)
         {
@@ -950,7 +945,7 @@ BOOL FillBitmap (
                 r = *src++;
                 g = *src++;
                 b = *src++;
-                *dst++ = b; /* note the reverse order  */
+                *dst++ = b; /* note the reverse order */
                 *dst++ = g;
                 *dst++ = r;
                 if (cImgChannels == 4)
@@ -964,7 +959,6 @@ BOOL FillBitmap (
     return TRUE;
 }
 
-/*-----------------
- *  end of source
- *-----------------
- */
+//-----------------
+//  end of source
+//-----------------

contrib/visupng/VisualPng.dsp

@@ -43,9 +43,9 @@ RSC=rc.exe
 # PROP Intermediate_Dir "Release"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /O2 /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "NDEBUG" /D "PNG_NO_STDIO" /FD /c
+# ADD BASE CPP /nologo /W3 /O2 /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "NDEBUG" /D "PNG_NO_STDIO" /D "PNG_NO_GLOBAL_ARRAYS" /FD /c
 # SUBTRACT BASE CPP /YX
-# ADD CPP /nologo /MD /W3 /O2 /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "NDEBUG" /D "PNG_NO_STDIO" /FD /c
+# ADD CPP /nologo /MD /W3 /O2 /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "NDEBUG" /D "PNG_NO_STDIO" /D "PNG_NO_GLOBAL_ARRAYS" /FD /c
 # SUBTRACT CPP /YX
 # ADD BASE MTL /nologo /D "NDEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "NDEBUG" /mktyplib203 /win32
@@ -77,9 +77,9 @@ PostBuild_Cmds=$(outdir)\VisualPng.exe ..\..\contrib\pngsuite\basn6a16.png
 # PROP Intermediate_Dir "Debug"
 # PROP Ignore_Export_Lib 0
 # PROP Target_Dir ""
-# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "_DEBUG" /D "PNG_NO_STDIO" /FD /GZ /c
+# ADD BASE CPP /nologo /W3 /Gm /ZI /Od /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "_DEBUG" /D "PNG_NO_STDIO" /D "PNG_NO_GLOBAL_ARRAYS" /FD /GZ /c
 # SUBTRACT BASE CPP /YX
-# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "_DEBUG" /D "PNG_NO_STDIO" /FD /GZ /c
+# ADD CPP /nologo /MDd /W3 /Gm /ZI /Od /I "..\.." /I "..\..\..\zlib" /D "WIN32" /D "_DEBUG" /D "PNG_NO_STDIO" /D "PNG_NO_GLOBAL_ARRAYS" /FD /GZ /c
 # SUBTRACT CPP /YX
 # ADD BASE MTL /nologo /D "_DEBUG" /mktyplib203 /win32
 # ADD MTL /nologo /D "_DEBUG" /mktyplib203 /win32

contrib/visupng/resource.h

@@ -12,7 +12,7 @@
 #define IDM_HELP_ABOUT                  40008
 
 // Next default values for new objects
-//
+// 
 #ifdef APSTUDIO_INVOKED
 #ifndef APSTUDIO_READONLY_SYMBOLS
 #define _APS_NEXT_RESOURCE_VALUE        113

depcomp

@@ -0,0 +1,630 @@
+#! /bin/sh
+# depcomp - compile a program generating dependencies as side-effects
+
+scriptversion=2009-04-28.21; # UTC
+
+# Copyright (C) 1999, 2000, 2003, 2004, 2005, 2006, 2007, 2009 Free
+# Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
+
+case $1 in
+  '')
+     echo "$0: No command.  Try \`$0 --help' for more information." 1>&2
+     exit 1;
+     ;;
+  -h | --h*)
+    cat <<\EOF
+Usage: depcomp [--help] [--version] PROGRAM [ARGS]
+
+Run PROGRAMS ARGS to compile a file, generating dependencies
+as side-effects.
+
+Environment variables:
+  depmode     Dependency tracking mode.
+  source      Source file read by `PROGRAMS ARGS'.
+  object      Object file output by `PROGRAMS ARGS'.
+  DEPDIR      directory where to store dependencies.
+  depfile     Dependency file to output.
+  tmpdepfile  Temporary file to use when outputing dependencies.
+  libtool     Whether libtool is used (yes/no).
+
+Report bugs to <bug-automake@gnu.org>.
+EOF
+    exit $?
+    ;;
+  -v | --v*)
+    echo "depcomp $scriptversion"
+    exit $?
+    ;;
+esac
+
+if test -z "$depmode" || test -z "$source" || test -z "$object"; then
+  echo "depcomp: Variables source, object and depmode must be set" 1>&2
+  exit 1
+fi
+
+# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
+depfile=${depfile-`echo "$object" |
+  sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
+tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
+
+rm -f "$tmpdepfile"
+
+# Some modes work just like other modes, but use different flags.  We
+# parameterize here, but still list the modes in the big case below,
+# to make depend.m4 easier to write.  Note that we *cannot* use a case
+# here, because this file can only contain one case statement.
+if test "$depmode" = hp; then
+  # HP compiler uses -M and no extra arg.
+  gccflag=-M
+  depmode=gcc
+fi
+
+if test "$depmode" = dashXmstdout; then
+   # This is just like dashmstdout with a different argument.
+   dashmflag=-xM
+   depmode=dashmstdout
+fi
+
+cygpath_u="cygpath -u -f -"
+if test "$depmode" = msvcmsys; then
+   # This is just like msvisualcpp but w/o cygpath translation.
+   # Just convert the backslash-escaped backslashes to single forward
+   # slashes to satisfy depend.m4
+   cygpath_u="sed s,\\\\\\\\,/,g"
+   depmode=msvisualcpp
+fi
+
+case "$depmode" in
+gcc3)
+## gcc 3 implements dependency tracking that does exactly what
+## we want.  Yay!  Note: for some reason libtool 1.4 doesn't like
+## it if -MD -MP comes after the -MF stuff.  Hmm.
+## Unfortunately, FreeBSD c89 acceptance of flags depends upon
+## the command line argument order; so add the flags where they
+## appear in depend2.am.  Note that the slowdown incurred here
+## affects only configure: in makefiles, %FASTDEP% shortcuts this.
+  for arg
+  do
+    case $arg in
+    -c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
+    *)  set fnord "$@" "$arg" ;;
+    esac
+    shift # fnord
+    shift # $arg
+  done
+  "$@"
+  stat=$?
+  if test $stat -eq 0; then :
+  else
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  mv "$tmpdepfile" "$depfile"
+  ;;
+
+gcc)
+## There are various ways to get dependency output from gcc.  Here's
+## why we pick this rather obscure method:
+## - Don't want to use -MD because we'd like the dependencies to end
+##   up in a subdir.  Having to rename by hand is ugly.
+##   (We might end up doing this anyway to support other compilers.)
+## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
+##   -MM, not -M (despite what the docs say).
+## - Using -M directly means running the compiler twice (even worse
+##   than renaming).
+  if test -z "$gccflag"; then
+    gccflag=-MD,
+  fi
+  "$@" -Wp,"$gccflag$tmpdepfile"
+  stat=$?
+  if test $stat -eq 0; then :
+  else
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  alpha=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
+## The second -e expression handles DOS-style file names with drive letters.
+  sed -e 's/^[^:]*: / /' \
+      -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
+## This next piece of magic avoids the `deleted header file' problem.
+## The problem is that when a header file which appears in a .P file
+## is deleted, the dependency causes make to die (because there is
+## typically no way to rebuild the header).  We avoid this by adding
+## dummy dependencies for each header file.  Too bad gcc doesn't do
+## this for us directly.
+  tr ' ' '
+' < "$tmpdepfile" |
+## Some versions of gcc put a space before the `:'.  On the theory
+## that the space means something, we add a space to the output as
+## well.
+## Some versions of the HPUX 10.20 sed can't process this invocation
+## correctly.  Breaking it into two sed invocations is a workaround.
+    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+sgi)
+  if test "$libtool" = yes; then
+    "$@" "-Wp,-MDupdate,$tmpdepfile"
+  else
+    "$@" -MDupdate "$tmpdepfile"
+  fi
+  stat=$?
+  if test $stat -eq 0; then :
+  else
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+
+  if test -f "$tmpdepfile"; then  # yes, the sourcefile depend on other files
+    echo "$object : \\" > "$depfile"
+
+    # Clip off the initial element (the dependent).  Don't try to be
+    # clever and replace this with sed code, as IRIX sed won't handle
+    # lines with more than a fixed number of characters (4096 in
+    # IRIX 6.2 sed, 8192 in IRIX 6.5).  We also remove comment lines;
+    # the IRIX cc adds comments like `#:fec' to the end of the
+    # dependency line.
+    tr ' ' '
+' < "$tmpdepfile" \
+    | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' | \
+    tr '
+' ' ' >> "$depfile"
+    echo >> "$depfile"
+
+    # The second pass generates a dummy entry for each header file.
+    tr ' ' '
+' < "$tmpdepfile" \
+   | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
+   >> "$depfile"
+  else
+    # The sourcefile does not contain any dependencies, so just
+    # store a dummy comment line, to avoid errors with the Makefile
+    # "include basename.Plo" scheme.
+    echo "#dummy" > "$depfile"
+  fi
+  rm -f "$tmpdepfile"
+  ;;
+
+aix)
+  # The C for AIX Compiler uses -M and outputs the dependencies
+  # in a .u file.  In older versions, this file always lives in the
+  # current directory.  Also, the AIX compiler puts `$object:' at the
+  # start of each line; $object doesn't have directory information.
+  # Version 6 uses the directory in both cases.
+  dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
+  test "x$dir" = "x$object" && dir=
+  base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$base.u
+    tmpdepfile3=$dir.libs/$base.u
+    "$@" -Wc,-M
+  else
+    tmpdepfile1=$dir$base.u
+    tmpdepfile2=$dir$base.u
+    tmpdepfile3=$dir$base.u
+    "$@" -M
+  fi
+  stat=$?
+
+  if test $stat -eq 0; then :
+  else
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+    exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  if test -f "$tmpdepfile"; then
+    # Each line is of the form `foo.o: dependent.h'.
+    # Do two passes, one to just change these to
+    # `$object: dependent.h' and one to simply `dependent.h:'.
+    sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile"
+    # That's a tab and a space in the [].
+    sed -e 's,^.*\.[a-z]*:[	 ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile"
+  else
+    # The sourcefile does not contain any dependencies, so just
+    # store a dummy comment line, to avoid errors with the Makefile
+    # "include basename.Plo" scheme.
+    echo "#dummy" > "$depfile"
+  fi
+  rm -f "$tmpdepfile"
+  ;;
+
+icc)
+  # Intel's C compiler understands `-MD -MF file'.  However on
+  #    icc -MD -MF foo.d -c -o sub/foo.o sub/foo.c
+  # ICC 7.0 will fill foo.d with something like
+  #    foo.o: sub/foo.c
+  #    foo.o: sub/foo.h
+  # which is wrong.  We want:
+  #    sub/foo.o: sub/foo.c
+  #    sub/foo.o: sub/foo.h
+  #    sub/foo.c:
+  #    sub/foo.h:
+  # ICC 7.1 will output
+  #    foo.o: sub/foo.c sub/foo.h
+  # and will wrap long lines using \ :
+  #    foo.o: sub/foo.c ... \
+  #     sub/foo.h ... \
+  #     ...
+
+  "$@" -MD -MF "$tmpdepfile"
+  stat=$?
+  if test $stat -eq 0; then :
+  else
+    rm -f "$tmpdepfile"
+    exit $stat
+  fi
+  rm -f "$depfile"
+  # Each line is of the form `foo.o: dependent.h',
+  # or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
+  # Do two passes, one to just change these to
+  # `$object: dependent.h' and one to simply `dependent.h:'.
+  sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
+  # Some versions of the HPUX 10.20 sed can't process this invocation
+  # correctly.  Breaking it into two sed invocations is a workaround.
+  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" |
+    sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+hp2)
+  # The "hp" stanza above does not work with aCC (C++) and HP's ia64
+  # compilers, which have integrated preprocessors.  The correct option
+  # to use with these is +Maked; it writes dependencies to a file named
+  # 'foo.d', which lands next to the object file, wherever that
+  # happens to be.
+  # Much of this is similar to the tru64 case; see comments there.
+  dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
+  test "x$dir" = "x$object" && dir=
+  base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
+  if test "$libtool" = yes; then
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir.libs/$base.d
+    "$@" -Wc,+Maked
+  else
+    tmpdepfile1=$dir$base.d
+    tmpdepfile2=$dir$base.d
+    "$@" +Maked
+  fi
+  stat=$?
+  if test $stat -eq 0; then :
+  else
+     rm -f "$tmpdepfile1" "$tmpdepfile2"
+     exit $stat
+  fi
+
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
+  do
+    test -f "$tmpdepfile" && break
+  done
+  if test -f "$tmpdepfile"; then
+    sed -e "s,^.*\.[a-z]*:,$object:," "$tmpdepfile" > "$depfile"
+    # Add `dependent.h:' lines.
+    sed -ne '2,${
+	       s/^ *//
+	       s/ \\*$//
+	       s/$/:/
+	       p
+	     }' "$tmpdepfile" >> "$depfile"
+  else
+    echo "#dummy" > "$depfile"
+  fi
+  rm -f "$tmpdepfile" "$tmpdepfile2"
+  ;;
+
+tru64)
+   # The Tru64 compiler uses -MD to generate dependencies as a side
+   # effect.  `cc -MD -o foo.o ...' puts the dependencies into `foo.o.d'.
+   # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
+   # dependencies in `foo.d' instead, so we check for that too.
+   # Subdirectories are respected.
+   dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
+   test "x$dir" = "x$object" && dir=
+   base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
+
+   if test "$libtool" = yes; then
+      # With Tru64 cc, shared objects can also be used to make a
+      # static library.  This mechanism is used in libtool 1.4 series to
+      # handle both shared and static libraries in a single compilation.
+      # With libtool 1.4, dependencies were output in $dir.libs/$base.lo.d.
+      #
+      # With libtool 1.5 this exception was removed, and libtool now
+      # generates 2 separate objects for the 2 libraries.  These two
+      # compilations output dependencies in $dir.libs/$base.o.d and
+      # in $dir$base.o.d.  We have to check for both files, because
+      # one of the two compilations can be disabled.  We should prefer
+      # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
+      # automatically cleaned when .libs/ is deleted, while ignoring
+      # the former would cause a distcleancheck panic.
+      tmpdepfile1=$dir.libs/$base.lo.d   # libtool 1.4
+      tmpdepfile2=$dir$base.o.d          # libtool 1.5
+      tmpdepfile3=$dir.libs/$base.o.d    # libtool 1.5
+      tmpdepfile4=$dir.libs/$base.d      # Compaq CCC V6.2-504
+      "$@" -Wc,-MD
+   else
+      tmpdepfile1=$dir$base.o.d
+      tmpdepfile2=$dir$base.d
+      tmpdepfile3=$dir$base.d
+      tmpdepfile4=$dir$base.d
+      "$@" -MD
+   fi
+
+   stat=$?
+   if test $stat -eq 0; then :
+   else
+      rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
+      exit $stat
+   fi
+
+   for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
+   do
+     test -f "$tmpdepfile" && break
+   done
+   if test -f "$tmpdepfile"; then
+      sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile"
+      # That's a tab and a space in the [].
+      sed -e 's,^.*\.[a-z]*:[	 ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile"
+   else
+      echo "#dummy" > "$depfile"
+   fi
+   rm -f "$tmpdepfile"
+   ;;
+
+#nosideeffect)
+  # This comment above is used by automake to tell side-effect
+  # dependency tracking mechanisms from slower ones.
+
+dashmstdout)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout, regardless of -o.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove `-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  test -z "$dashmflag" && dashmflag=-M
+  # Require at least two characters before searching for `:'
+  # in the target name.  This is to cope with DOS-style filenames:
+  # a dependency such as `c:/foo/bar' could be seen as target `c' otherwise.
+  "$@" $dashmflag |
+    sed 's:^[  ]*[^: ][^:][^:]*\:[    ]*:'"$object"'\: :' > "$tmpdepfile"
+  rm -f "$depfile"
+  cat < "$tmpdepfile" > "$depfile"
+  tr ' ' '
+' < "$tmpdepfile" | \
+## Some versions of the HPUX 10.20 sed can't process this invocation
+## correctly.  Breaking it into two sed invocations is a workaround.
+    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+dashXmstdout)
+  # This case only exists to satisfy depend.m4.  It is never actually
+  # run, as this mode is specially recognized in the preamble.
+  exit 1
+  ;;
+
+makedepend)
+  "$@" || exit $?
+  # Remove any Libtool call
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+  # X makedepend
+  shift
+  cleared=no eat=no
+  for arg
+  do
+    case $cleared in
+    no)
+      set ""; shift
+      cleared=yes ;;
+    esac
+    if test $eat = yes; then
+      eat=no
+      continue
+    fi
+    case "$arg" in
+    -D*|-I*)
+      set fnord "$@" "$arg"; shift ;;
+    # Strip any option that makedepend may not understand.  Remove
+    # the object too, otherwise makedepend will parse it as a source file.
+    -arch)
+      eat=yes ;;
+    -*|$object)
+      ;;
+    *)
+      set fnord "$@" "$arg"; shift ;;
+    esac
+  done
+  obj_suffix=`echo "$object" | sed 's/^.*\././'`
+  touch "$tmpdepfile"
+  ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
+  rm -f "$depfile"
+  cat < "$tmpdepfile" > "$depfile"
+  sed '1,2d' "$tmpdepfile" | tr ' ' '
+' | \
+## Some versions of the HPUX 10.20 sed can't process this invocation
+## correctly.  Breaking it into two sed invocations is a workaround.
+    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile" "$tmpdepfile".bak
+  ;;
+
+cpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  # Remove `-o $object'.
+  IFS=" "
+  for arg
+  do
+    case $arg in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    *)
+      set fnord "$@" "$arg"
+      shift # fnord
+      shift # $arg
+      ;;
+    esac
+  done
+
+  "$@" -E |
+    sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+       -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' |
+    sed '$ s: \\$::' > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  cat < "$tmpdepfile" >> "$depfile"
+  sed < "$tmpdepfile" '/^$/d;s/^ //;s/ \\$//;s/$/ :/' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvisualcpp)
+  # Important note: in order to support this mode, a compiler *must*
+  # always write the preprocessed file to stdout.
+  "$@" || exit $?
+
+  # Remove the call to Libtool.
+  if test "$libtool" = yes; then
+    while test "X$1" != 'X--mode=compile'; do
+      shift
+    done
+    shift
+  fi
+
+  IFS=" "
+  for arg
+  do
+    case "$arg" in
+    -o)
+      shift
+      ;;
+    $object)
+      shift
+      ;;
+    "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
+	set fnord "$@"
+	shift
+	shift
+	;;
+    *)
+	set fnord "$@" "$arg"
+	shift
+	shift
+	;;
+    esac
+  done
+  "$@" -E 2>/dev/null |
+  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
+  rm -f "$depfile"
+  echo "$object : \\" > "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::	\1 \\:p' >> "$depfile"
+  echo "	" >> "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
+  rm -f "$tmpdepfile"
+  ;;
+
+msvcmsys)
+  # This case exists only to let depend.m4 do its work.  It works by
+  # looking at the text of this script.  This case will never be run,
+  # since it is checked for above.
+  exit 1
+  ;;
+
+none)
+  exec "$@"
+  ;;
+
+*)
+  echo "Unknown depmode $depmode" 1>&2
+  exit 1
+  ;;
+esac
+
+exit 0
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:

example.c

@@ -2,17 +2,15 @@
 #if 0 /* in case someone actually tries to compile this */
 
 /* example.c - an example of using libpng
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Maintained 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.37 [June 4, 2009]
+ * This file has been placed in the public domain by the authors.
+ * Maintained 1998-2010 Glenn Randers-Pehrson
  * Maintained 1996, 1997 Andreas Dilger)
  * Written 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- * To the extent possible under law, the authors have waived
- * all copyright and related or neighboring rights to this file.
- * This work is published from: United States.
  */
 
 /* This is an example of how to use libpng to read and write PNG files.
- * The file libpng-manual.txt is much more verbose then this.  If you have not
+ * The file libpng.txt is much more verbose then this.  If you have not
  * read it, do so first.  This was designed to be a starting point of an
  * implementation.  This is not officially part of libpng, is hereby placed
  * in the public domain, and therefore does not require a copyright notice.
@@ -24,179 +22,7 @@
  * see also the programs in the contrib directory.
  */
 
-/* The simple, but restricted, approach to reading a PNG file or data stream
- * just requires two function calls, as in the following complete program.
- * Writing a file just needs one function call, so long as the data has an
- * appropriate layout.
- *
- * The following code reads PNG image data from a file and writes it, in a
- * potentially new format, to a new file.  While this code will compile there is
- * minimal (insufficient) error checking; for a more realistic version look at
- * contrib/examples/pngtopng.c
- */
-#include <stddef.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdio.h>
-#include <png.h>
-#include <zlib.h>
-
-int main(int argc, const char **argv)
-{
-   if (argc == 3)
-   {
-      png_image image; /* The control structure used by libpng */
-
-      /* Initialize the 'png_image' structure. */
-      memset(&image, 0, sizeof image);
-
-      /* The first argument is the file to read: */
-      if (png_image_begin_read_from_file(&image, argv[1]))
-      {
-         png_bytep buffer;
-
-         /* Set the format in which to read the PNG file; this code chooses a
-          * simple sRGB format with a non-associated alpha channel, adequate to
-          * store most images.
-          */
-         image.format = PNG_FORMAT_RGBA;
-
-         /* Now allocate enough memory to hold the image in this format; the
-          * PNG_IMAGE_SIZE macro uses the information about the image (width,
-          * height and format) stored in 'image'.
-          */
-         buffer = malloc(PNG_IMAGE_SIZE(image));
-
-         /* If enough memory was available read the image in the desired format
-          * then write the result out to the new file.  'background' is not
-          * necessary when reading the image because the alpha channel is
-          * preserved; if it were to be removed, for example if we requested
-          * PNG_FORMAT_RGB, then either a solid background color would have to
-          * be supplied or the output buffer would have to be initialized to the
-          * actual background of the image.
-          *
-          * The final argument to png_image_finish_read is the 'row_stride' -
-          * this is the number of components allocated for the image in each
-          * row.  It has to be at least as big as the value returned by
-          * PNG_IMAGE_ROW_STRIDE, but if you just allocate space for the
-          * default, minimum, size using PNG_IMAGE_SIZE as above you can pass
-          * zero.
-          */
-         if (buffer != NULL &&
-            png_image_finish_read(&image, NULL/*background*/, buffer,
-               0/*row_stride*/))
-         {
-            /* Now write the image out to the second argument.  In the write
-             * call 'convert_to_8bit' allows 16-bit data to be squashed down to
-             * 8 bits; this isn't necessary here because the original read was
-             * to the 8-bit format.
-             */
-            if (png_image_write_to_file(&image, argv[2], 0/*convert_to_8bit*/,
-               buffer, 0/*row_stride*/))
-            {
-               /* The image has been written successfully. */
-               exit(0);
-            }
-         }
-
-         else
-         {
-            /* Calling png_free_image is optional unless the simplified API was
-             * not run to completion.  In this case if there wasn't enough
-             * memory for 'buffer' we didn't complete the read, so we must free
-             * the image:
-             */
-            if (buffer == NULL)
-               png_free_image(&image);
-
-            else
-               free(buffer);
-      }
-
-      /* Something went wrong reading or writing the image.  libpng stores a
-       * textual message in the 'png_image' structure:
-       */
-      fprintf(stderr, "pngtopng: error: %s\n", image.message);
-      exit (1);
-   }
-
-   fprintf(stderr, "pngtopng: usage: pngtopng input-file output-file\n");
-   exit(1);
-}
-
-/* That's it ;-)  Of course you probably want to do more with PNG files than
- * just converting them all to 32-bit RGBA PNG files; you can do that between
- * the call to png_image_finish_read and png_image_write_to_file.  You can also
- * ask for the image data to be presented in a number of different formats.  You
- * do this by simply changing the 'format' parameter set before allocating the
- * buffer.
- *
- * The format parameter consists of five flags that define various aspects of
- * the image, you can simply add these together to get the format or you can use
- * one of the predefined macros from png.h (as above):
- *
- * PNG_FORMAT_FLAG_COLOR: if set the image will have three color components per
- *    pixel (red, green and blue), if not set the image will just have one
- *    luminance (grayscale) component.
- *
- * PNG_FORMAT_FLAG_ALPHA: if set each pixel in the image will have an additional
- *    alpha value; a linear value that describes the degree the image pixel
- *    covers (overwrites) the contents of the existing pixel on the display.
- *
- * PNG_FORMAT_FLAG_LINEAR: if set the components of each pixel will be returned
- *    as a series of 16-bit linear values, if not set the components will be
- *    returned as a series of 8-bit values encoded according to the 'sRGB'
- *    standard.  The 8-bit format is the normal format for images intended for
- *    direct display, because almost all display devices do the inverse of the
- *    sRGB transformation to the data they receive.  The 16-bit format is more
- *    common for scientific data and image data that must be further processed;
- *    because it is linear simple math can be done on the component values.
- *    Regardless of the setting of this flag the alpha channel is always linear,
- *    although it will be 8 bits or 16 bits wide as specified by the flag.
- *
- * PNG_FORMAT_FLAG_BGR: if set the components of a color pixel will be returned
- *    in the order blue, then green, then red.  If not set the pixel components
- *    are in the order red, then green, then blue.
- *
- * PNG_FORMAT_FLAG_AFIRST: if set the alpha channel (if present) precedes the
- *    color or grayscale components.  If not set the alpha channel follows the
- *    components.
- *
- * You do not have to read directly from a file.  You can read from memory or,
- * on systems that support it, from a <stdio.h> FILE*.  This is controlled by
- * the particular png_image_read_from_ function you call at the start.  Likewise
- * on write you can write to a FILE* if your system supports it.  Check the
- * macro PNG_STDIO_SUPPORTED to see if stdio support has been included in your
- * libpng build.
- *
- * If you read 16-bit (PNG_FORMAT_FLAG_LINEAR) data you may need to write it in
- * the 8-bit format for display.  You do this by setting the convert_to_8bit
- * flag to 'true'.
- *
- * Don't repeatedly convert between the 8-bit and 16-bit forms.  There is
- * significant data loss when 16-bit data is converted to the 8-bit encoding and
- * the current libpng implementation of convertion to 16-bit is also
- * significantly lossy.  The latter will be fixed in the future, but the former
- * is unavoidable - the 8-bit format just doesn't have enough resolution.
- */
-
-/* If your program needs more information from the PNG data it reads, or if you
- * need to do more complex transformations, or minimise transformations, on the
- * data you read, then you must use one of the several lower level libpng
- * interfaces.
- *
- * All these interfaces require that you do your own error handling - your
- * program must be able to arrange for control to return to your own code any
- * time libpng encounters a problem.  There are several ways to do this, but the
- * standard way is to use the ANSI-C (C90) <setjmp.h> interface to establish a
- * return point within your own code.  You must do this if you do not use the
- * simplified interface (above).
- *
- * The first step is to include the header files you need, including the libpng
- * header file.  Include any standard headers and feature test macros your
- * program requires before including png.h:
- */
-#include <png.h>
+#include "png.h"
 
  /* The png_jmpbuf() macro, used in error handling, became available in
   * libpng version 1.0.6.  If you want to be able to run your code with older
@@ -205,7 +31,7 @@ int main(int argc, const char **argv)
   */
 
 #ifndef png_jmpbuf
-#  define png_jmpbuf(png_ptr) ((png_ptr)->png_jmpbuf)
+#  define png_jmpbuf(png_ptr) ((png_ptr)->jmpbuf)
 #endif
 
 /* Check to see if a file is a PNG file using png_sig_cmp().  png_sig_cmp()
@@ -295,7 +121,7 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
    if (info_ptr == NULL)
    {
       fclose(fp);
-      png_destroy_read_struct(&png_ptr, NULL, NULL);
+      png_destroy_read_struct(&png_ptr, png_infopp_NULL, png_infopp_NULL);
       return (ERROR);
    }
 
@@ -307,7 +133,7 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
    if (setjmp(png_jmpbuf(png_ptr)))
    {
       /* Free all of the memory associated with the png_ptr and info_ptr */
-      png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+      png_destroy_read_struct(&png_ptr, &info_ptr, png_infopp_NULL);
       fclose(fp);
       /* If we get here, we had a problem reading the file */
       return (ERROR);
@@ -334,11 +160,11 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
     * If you have enough memory to read in the entire image at once,
     * and you need to specify only transforms that can be controlled
     * with one of the PNG_TRANSFORM_* bits (this presently excludes
-    * quantizing, filling, setting background, and doing gamma
+    * dithering, filling, setting background, and doing gamma
     * adjustment), then you can read the entire image (including
     * pixels) into the info structure with this call:
     */
-   png_read_png(png_ptr, info_ptr, png_transforms, NULL);
+   png_read_png(png_ptr, info_ptr, png_transforms, png_voidp_NULL);
 
 #else
    /* OK, you're doing it the hard way, with the lower-level functions */
@@ -349,7 +175,7 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
    png_read_info(png_ptr, info_ptr);
 
    png_get_IHDR(png_ptr, info_ptr, &width, &height, &bit_depth, &color_type,
-       &interlace_type, NULL, NULL);
+       &interlace_type, int_p_NULL, int_p_NULL);
 
    /* Set up the data transformations you want.  Note that these are all
     * optional.  Only call them if you want/need them.  Many of the
@@ -357,15 +183,8 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
     * are mutually exclusive.
     */
 
-   /* Tell libpng to strip 16 bit/color files down to 8 bits/color.
-    * Use accurate scaling if it's available, otherwise just chop off the
-    * low byte.
-    */
-#ifdef PNG_READ_SCALE_16_TO_8_SUPPORTED
-    png_set_scale_16(png_ptr);
-#else
+   /* Tell libpng to strip 16 bit/color files down to 8 bits/color */
    png_set_strip_16(png_ptr);
-#endif
 
    /* Strip alpha bytes from the input data without combining with the
     * background (not recommended).
@@ -452,8 +271,7 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
          png_set_gamma(png_ptr, screen_gamma, 0.45455);
    }
 
-#ifdef PNG_READ_QUANTIZE_SUPPORTED
-   /* Quantize RGB files down to 8 bit palette or reduce palettes
+   /* Dither RGB files down to 8 bit palette or reduce palettes
     * to the number of colors available on your screen.
     */
    if (color_type & PNG_COLOR_MASK_COLOR)
@@ -464,11 +282,11 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
       /* This reduces the image to the application supplied palette */
       if (/* We have our own palette */)
       {
-         /* An array of colors to which the image should be quantized */
+         /* An array of colors to which the image should be dithered */
          png_color std_color_cube[MAX_SCREEN_COLORS];
 
-         png_set_quantize(png_ptr, std_color_cube, MAX_SCREEN_COLORS,
-            MAX_SCREEN_COLORS, NULL, 0);
+         png_set_dither(png_ptr, std_color_cube, MAX_SCREEN_COLORS,
+            MAX_SCREEN_COLORS, png_uint_16p_NULL, 0);
       }
       /* This reduces the image to the palette supplied in the file */
       else if (png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette))
@@ -477,11 +295,10 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
 
          png_get_hIST(png_ptr, info_ptr, &histogram);
 
-         png_set_quantize(png_ptr, palette, num_palette,
+         png_set_dither(png_ptr, palette, num_palette,
                         max_screen_colors, histogram, 0);
       }
    }
-#endif /* PNG_READ_QUANTIZE_SUPPORTED */
 
    /* Invert monochrome files to have 0 as white and 1 as black */
    png_set_invert_mono(png_ptr);
@@ -511,16 +328,11 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
    /* Add filler (or alpha) byte (before/after each RGB triplet) */
    png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);
 
-#ifdef PNG_READ_INTERLACING_SUPPORTED
    /* Turn on interlace handling.  REQUIRED if you are not using
     * png_read_image().  To see how to handle interlacing passes,
     * see the png_read_row() method below:
     */
    number_passes = png_set_interlace_handling(png_ptr);
-#else
-   number_passes = 1;
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
-
 
    /* Optional call to gamma correct and add the background to the palette
     * and update info structure.  REQUIRED if you are expecting libpng to
@@ -553,17 +365,17 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
 #ifdef single /* Read the image a single row at a time */
       for (y = 0; y < height; y++)
       {
-         png_read_rows(png_ptr, &row_pointers[y], NULL, 1);
+         png_read_rows(png_ptr, &row_pointers[y], png_bytepp_NULL, 1);
       }
 
 #else no_single /* Read the image several rows at a time */
       for (y = 0; y < height; y += number_of_rows)
       {
 #ifdef sparkle /* Read the image using the "sparkle" effect. */
-         png_read_rows(png_ptr, &row_pointers[y], NULL,
+         png_read_rows(png_ptr, &row_pointers[y], png_bytepp_NULL,
             number_of_rows);
 #else no_sparkle /* Read the image using the "rectangle" effect */
-         png_read_rows(png_ptr, NULL, &row_pointers[y],
+         png_read_rows(png_ptr, png_bytepp_NULL, &row_pointers[y],
             number_of_rows);
 #endif no_sparkle /* Use only one of these two methods */
       }
@@ -580,7 +392,7 @@ void read_png(FILE *fp, unsigned int sig_read)  /* File is already open */
    /* At this point you have read the entire image */
 
    /* Clean up after the read, and free any memory allocated - REQUIRED */
-   png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+   png_destroy_read_struct(&png_ptr, &info_ptr, png_infopp_NULL);
 
    /* Close the file */
    fclose(fp);
@@ -613,13 +425,13 @@ initialize_png_reader(png_structp *png_ptr, png_infop *info_ptr)
 
    if (*info_ptr == NULL)
    {
-      png_destroy_read_struct(png_ptr, info_ptr, NULL);
+      png_destroy_read_struct(png_ptr, info_ptr, png_infopp_NULL);
       return (ERROR);
    }
 
    if (setjmp(png_jmpbuf((*png_ptr))))
    {
-      png_destroy_read_struct(png_ptr, info_ptr, NULL);
+      png_destroy_read_struct(png_ptr, info_ptr, png_infopp_NULL);
       return (ERROR);
    }
 
@@ -648,7 +460,7 @@ process_data(png_structp *png_ptr, png_infop *info_ptr,
    if (setjmp(png_jmpbuf((*png_ptr))))
    {
       /* Free the png_ptr and info_ptr memory on error */
-      png_destroy_read_struct(png_ptr, info_ptr, NULL);
+      png_destroy_read_struct(png_ptr, info_ptr, png_infopp_NULL);
       return (ERROR);
    }
 
@@ -697,18 +509,20 @@ row_callback(png_structp png_ptr, png_bytep new_row,
     * shown below:
     */
 
-   /* Get pointer to corresponding row in our
-    * PNG read buffer.
-    */
-   png_bytep old_row = ((png_bytep *)our_data)[row_num];
-
-#ifdef PNG_READ_INTERLACING_SUPPORTED
-   /* If both rows are allocated then copy the new row
-    * data to the corresponding row data.
-    */
-   if ((old_row != NULL) && (new_row != NULL))
-   png_progressive_combine_row(png_ptr, old_row, new_row);
+   /* Check if row_num is in bounds. */
+   if ((row_num >= 0) && (row_num < height))
+   {
+     /* Get pointer to corresponding row in our
+      * PNG read buffer.
+      */
+     png_bytep old_row = ((png_bytep *)our_data)[row_num];
 
+     /* If both rows are allocated then copy the new row
+      * data to the corresponding row data.
+      */
+     if ((old_row != NULL) && (new_row != NULL))
+     png_progressive_combine_row(png_ptr, old_row, new_row);
+   }
    /*
     * The rows and passes are called in order, so you don't really
     * need the row_num and pass, but I'm supplying them because it
@@ -718,7 +532,7 @@ row_callback(png_structp png_ptr, png_bytep new_row,
     * png_progressive_combine_row() passing in the new row and the
     * old row, as demonstrated above.  You can call this function for
     * NULL rows (it will just return) and for non-interlaced images
-    * (it just does the memcpy for you) if it will make the code
+    * (it just does the png_memcpy for you) if it will make the code
     * easier.  Thus, you can just do this for all cases:
     */
 
@@ -731,7 +545,6 @@ row_callback(png_structp png_ptr, png_bytep new_row,
     * to pass the current row as new_row, and the function will combine
     * the old row and the new row.
     */
-#endif /* PNG_READ_INTERLACING_SUPPORTED */
 }
 
 end_callback(png_structp png_ptr, png_infop info)
@@ -780,7 +593,7 @@ void write_png(char *file_name /* , ... other image information ... */)
    if (info_ptr == NULL)
    {
       fclose(fp);
-      png_destroy_write_struct(&png_ptr,  NULL);
+      png_destroy_write_struct(&png_ptr,  png_infopp_NULL);
       return (ERROR);
    }
 
@@ -815,7 +628,7 @@ void write_png(char *file_name /* , ... other image information ... */)
     * image info living in the structure.  You could "|" many
     * PNG_TRANSFORM flags into the png_transforms integer here.
     */
-   png_write_png(png_ptr, info_ptr, png_transforms, NULL);
+   png_write_png(png_ptr, info_ptr, png_transforms, png_voidp_NULL);
 
 #else
    /* This is the hard way */
@@ -843,18 +656,14 @@ void write_png(char *file_name /* , ... other image information ... */)
 
    /* Optional significant bit (sBIT) chunk */
    png_color_8 sig_bit;
-
    /* If we are dealing with a grayscale image then */
    sig_bit.gray = true_bit_depth;
-
    /* Otherwise, if we are dealing with a color image then */
    sig_bit.red = true_red_bit_depth;
    sig_bit.green = true_green_bit_depth;
    sig_bit.blue = true_blue_bit_depth;
-
    /* If the image has an alpha channel then */
    sig_bit.alpha = true_alpha_bit_depth;
-
    png_set_sBIT(png_ptr, info_ptr, &sig_bit);
 
 
@@ -867,21 +676,17 @@ void write_png(char *file_name /* , ... other image information ... */)
    text_ptr[0].key = "Title";
    text_ptr[0].text = "Mona Lisa";
    text_ptr[0].compression = PNG_TEXT_COMPRESSION_NONE;
-   text_ptr[0].itxt_length = 0;
-   text_ptr[0].lang = NULL;
-   text_ptr[0].lang_key = NULL;
    text_ptr[1].key = "Author";
    text_ptr[1].text = "Leonardo DaVinci";
    text_ptr[1].compression = PNG_TEXT_COMPRESSION_NONE;
-   text_ptr[1].itxt_length = 0;
-   text_ptr[1].lang = NULL;
-   text_ptr[1].lang_key = NULL;
    text_ptr[2].key = "Description";
    text_ptr[2].text = "<long text>";
    text_ptr[2].compression = PNG_TEXT_COMPRESSION_zTXt;
-   text_ptr[2].itxt_length = 0;
+#ifdef PNG_iTXt_SUPPORTED
+   text_ptr[0].lang = NULL;
+   text_ptr[1].lang = NULL;
    text_ptr[2].lang = NULL;
-   text_ptr[2].lang_key = NULL;
+#endif
    png_set_text(png_ptr, info_ptr, text_ptr, 3);
 
    /* Other optional chunks like cHRM, bKGD, tRNS, tIME, oFFs, pHYs */
@@ -946,7 +751,6 @@ void write_png(char *file_name /* , ... other image information ... */)
    /* Turn on interlace handling if you are not using png_write_image() */
    if (interlacing)
       number_passes = png_set_interlace_handling(png_ptr);
-
    else
       number_passes = 1;
 

install-sh

@@ -0,0 +1,520 @@
+#!/bin/sh
+# install - install a program, script, or datafile
+
+scriptversion=2009-04-28.21; # UTC
+
+# This originates from X11R5 (mit/util/scripts/install.sh), which was
+# later released in X11R6 (xc/config/util/install.sh) with the
+# following copyright and license.
+#
+# Copyright (C) 1994 X Consortium
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to
+# deal in the Software without restriction, including without limitation the
+# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+# sell copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+# X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+# AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
+# TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+# Except as contained in this notice, the name of the X Consortium shall not
+# be used in advertising or otherwise to promote the sale, use or other deal-
+# ings in this Software without prior written authorization from the X Consor-
+# tium.
+#
+#
+# FSF changes to this file are in the public domain.
+#
+# Calling this script install-sh is preferred over install.sh, to prevent
+# `make' implicit rules from creating a file called install from it
+# when there is no Makefile.
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch.
+
+nl='
+'
+IFS=" ""	$nl"
+
+# set DOITPROG to echo to test this script
+
+# Don't use :- since 4.3BSD and earlier shells don't like it.
+doit=${DOITPROG-}
+if test -z "$doit"; then
+  doit_exec=exec
+else
+  doit_exec=$doit
+fi
+
+# Put in absolute file names if you don't have them in your path;
+# or use environment vars.
+
+chgrpprog=${CHGRPPROG-chgrp}
+chmodprog=${CHMODPROG-chmod}
+chownprog=${CHOWNPROG-chown}
+cmpprog=${CMPPROG-cmp}
+cpprog=${CPPROG-cp}
+mkdirprog=${MKDIRPROG-mkdir}
+mvprog=${MVPROG-mv}
+rmprog=${RMPROG-rm}
+stripprog=${STRIPPROG-strip}
+
+posix_glob='?'
+initialize_posix_glob='
+  test "$posix_glob" != "?" || {
+    if (set -f) 2>/dev/null; then
+      posix_glob=
+    else
+      posix_glob=:
+    fi
+  }
+'
+
+posix_mkdir=
+
+# Desired mode of installed file.
+mode=0755
+
+chgrpcmd=
+chmodcmd=$chmodprog
+chowncmd=
+mvcmd=$mvprog
+rmcmd="$rmprog -f"
+stripcmd=
+
+src=
+dst=
+dir_arg=
+dst_arg=
+
+copy_on_change=false
+no_target_directory=
+
+usage="\
+Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
+   or: $0 [OPTION]... SRCFILES... DIRECTORY
+   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
+   or: $0 [OPTION]... -d DIRECTORIES...
+
+In the 1st form, copy SRCFILE to DSTFILE.
+In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
+In the 4th, create DIRECTORIES.
+
+Options:
+     --help     display this help and exit.
+     --version  display version info and exit.
+
+  -c            (ignored)
+  -C            install only if different (preserve the last data modification time)
+  -d            create directories instead of installing files.
+  -g GROUP      $chgrpprog installed files to GROUP.
+  -m MODE       $chmodprog installed files to MODE.
+  -o USER       $chownprog installed files to USER.
+  -s            $stripprog installed files.
+  -t DIRECTORY  install into DIRECTORY.
+  -T            report an error if DSTFILE is a directory.
+
+Environment variables override the default commands:
+  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
+  RMPROG STRIPPROG
+"
+
+while test $# -ne 0; do
+  case $1 in
+    -c) ;;
+
+    -C) copy_on_change=true;;
+
+    -d) dir_arg=true;;
+
+    -g) chgrpcmd="$chgrpprog $2"
+	shift;;
+
+    --help) echo "$usage"; exit $?;;
+
+    -m) mode=$2
+	case $mode in
+	  *' '* | *'	'* | *'
+'*	  | *'*'* | *'?'* | *'['*)
+	    echo "$0: invalid mode: $mode" >&2
+	    exit 1;;
+	esac
+	shift;;
+
+    -o) chowncmd="$chownprog $2"
+	shift;;
+
+    -s) stripcmd=$stripprog;;
+
+    -t) dst_arg=$2
+	shift;;
+
+    -T) no_target_directory=true;;
+
+    --version) echo "$0 $scriptversion"; exit $?;;
+
+    --)	shift
+	break;;
+
+    -*)	echo "$0: invalid option: $1" >&2
+	exit 1;;
+
+    *)  break;;
+  esac
+  shift
+done
+
+if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
+  # When -d is used, all remaining arguments are directories to create.
+  # When -t is used, the destination is already specified.
+  # Otherwise, the last argument is the destination.  Remove it from $@.
+  for arg
+  do
+    if test -n "$dst_arg"; then
+      # $@ is not empty: it contains at least $arg.
+      set fnord "$@" "$dst_arg"
+      shift # fnord
+    fi
+    shift # arg
+    dst_arg=$arg
+  done
+fi
+
+if test $# -eq 0; then
+  if test -z "$dir_arg"; then
+    echo "$0: no input file specified." >&2
+    exit 1
+  fi
+  # It's OK to call `install-sh -d' without argument.
+  # This can happen when creating conditional directories.
+  exit 0
+fi
+
+if test -z "$dir_arg"; then
+  trap '(exit $?); exit' 1 2 13 15
+
+  # Set umask so as not to create temps with too-generous modes.
+  # However, 'strip' requires both read and write access to temps.
+  case $mode in
+    # Optimize common cases.
+    *644) cp_umask=133;;
+    *755) cp_umask=22;;
+
+    *[0-7])
+      if test -z "$stripcmd"; then
+	u_plus_rw=
+      else
+	u_plus_rw='% 200'
+      fi
+      cp_umask=`expr '(' 777 - $mode % 1000 ')' $u_plus_rw`;;
+    *)
+      if test -z "$stripcmd"; then
+	u_plus_rw=
+      else
+	u_plus_rw=,u+rw
+      fi
+      cp_umask=$mode$u_plus_rw;;
+  esac
+fi
+
+for src
+do
+  # Protect names starting with `-'.
+  case $src in
+    -*) src=./$src;;
+  esac
+
+  if test -n "$dir_arg"; then
+    dst=$src
+    dstdir=$dst
+    test -d "$dstdir"
+    dstdir_status=$?
+  else
+
+    # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
+    # might cause directories to be created, which would be especially bad
+    # if $src (and thus $dsttmp) contains '*'.
+    if test ! -f "$src" && test ! -d "$src"; then
+      echo "$0: $src does not exist." >&2
+      exit 1
+    fi
+
+    if test -z "$dst_arg"; then
+      echo "$0: no destination specified." >&2
+      exit 1
+    fi
+
+    dst=$dst_arg
+    # Protect names starting with `-'.
+    case $dst in
+      -*) dst=./$dst;;
+    esac
+
+    # If destination is a directory, append the input filename; won't work
+    # if double slashes aren't ignored.
+    if test -d "$dst"; then
+      if test -n "$no_target_directory"; then
+	echo "$0: $dst_arg: Is a directory" >&2
+	exit 1
+      fi
+      dstdir=$dst
+      dst=$dstdir/`basename "$src"`
+      dstdir_status=0
+    else
+      # Prefer dirname, but fall back on a substitute if dirname fails.
+      dstdir=`
+	(dirname "$dst") 2>/dev/null ||
+	expr X"$dst" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	     X"$dst" : 'X\(//\)[^/]' \| \
+	     X"$dst" : 'X\(//\)$' \| \
+	     X"$dst" : 'X\(/\)' \| . 2>/dev/null ||
+	echo X"$dst" |
+	    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
+		   s//\1/
+		   q
+		 }
+		 /^X\(\/\/\)[^/].*/{
+		   s//\1/
+		   q
+		 }
+		 /^X\(\/\/\)$/{
+		   s//\1/
+		   q
+		 }
+		 /^X\(\/\).*/{
+		   s//\1/
+		   q
+		 }
+		 s/.*/./; q'
+      `
+
+      test -d "$dstdir"
+      dstdir_status=$?
+    fi
+  fi
+
+  obsolete_mkdir_used=false
+
+  if test $dstdir_status != 0; then
+    case $posix_mkdir in
+      '')
+	# Create intermediate dirs using mode 755 as modified by the umask.
+	# This is like FreeBSD 'install' as of 1997-10-28.
+	umask=`umask`
+	case $stripcmd.$umask in
+	  # Optimize common cases.
+	  *[2367][2367]) mkdir_umask=$umask;;
+	  .*0[02][02] | .[02][02] | .[02]) mkdir_umask=22;;
+
+	  *[0-7])
+	    mkdir_umask=`expr $umask + 22 \
+	      - $umask % 100 % 40 + $umask % 20 \
+	      - $umask % 10 % 4 + $umask % 2
+	    `;;
+	  *) mkdir_umask=$umask,go-w;;
+	esac
+
+	# With -d, create the new directory with the user-specified mode.
+	# Otherwise, rely on $mkdir_umask.
+	if test -n "$dir_arg"; then
+	  mkdir_mode=-m$mode
+	else
+	  mkdir_mode=
+	fi
+
+	posix_mkdir=false
+	case $umask in
+	  *[123567][0-7][0-7])
+	    # POSIX mkdir -p sets u+wx bits regardless of umask, which
+	    # is incompatible with FreeBSD 'install' when (umask & 300) != 0.
+	    ;;
+	  *)
+	    tmpdir=${TMPDIR-/tmp}/ins$RANDOM-$$
+	    trap 'ret=$?; rmdir "$tmpdir/d" "$tmpdir" 2>/dev/null; exit $ret' 0
+
+	    if (umask $mkdir_umask &&
+		exec $mkdirprog $mkdir_mode -p -- "$tmpdir/d") >/dev/null 2>&1
+	    then
+	      if test -z "$dir_arg" || {
+		   # Check for POSIX incompatibilities with -m.
+		   # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
+		   # other-writeable bit of parent directory when it shouldn't.
+		   # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
+		   ls_ld_tmpdir=`ls -ld "$tmpdir"`
+		   case $ls_ld_tmpdir in
+		     d????-?r-*) different_mode=700;;
+		     d????-?--*) different_mode=755;;
+		     *) false;;
+		   esac &&
+		   $mkdirprog -m$different_mode -p -- "$tmpdir" && {
+		     ls_ld_tmpdir_1=`ls -ld "$tmpdir"`
+		     test "$ls_ld_tmpdir" = "$ls_ld_tmpdir_1"
+		   }
+		 }
+	      then posix_mkdir=:
+	      fi
+	      rmdir "$tmpdir/d" "$tmpdir"
+	    else
+	      # Remove any dirs left behind by ancient mkdir implementations.
+	      rmdir ./$mkdir_mode ./-p ./-- 2>/dev/null
+	    fi
+	    trap '' 0;;
+	esac;;
+    esac
+
+    if
+      $posix_mkdir && (
+	umask $mkdir_umask &&
+	$doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir"
+      )
+    then :
+    else
+
+      # The umask is ridiculous, or mkdir does not conform to POSIX,
+      # or it failed possibly due to a race condition.  Create the
+      # directory the slow way, step by step, checking for races as we go.
+
+      case $dstdir in
+	/*) prefix='/';;
+	-*) prefix='./';;
+	*)  prefix='';;
+      esac
+
+      eval "$initialize_posix_glob"
+
+      oIFS=$IFS
+      IFS=/
+      $posix_glob set -f
+      set fnord $dstdir
+      shift
+      $posix_glob set +f
+      IFS=$oIFS
+
+      prefixes=
+
+      for d
+      do
+	test -z "$d" && continue
+
+	prefix=$prefix$d
+	if test -d "$prefix"; then
+	  prefixes=
+	else
+	  if $posix_mkdir; then
+	    (umask=$mkdir_umask &&
+	     $doit_exec $mkdirprog $mkdir_mode -p -- "$dstdir") && break
+	    # Don't fail if two instances are running concurrently.
+	    test -d "$prefix" || exit 1
+	  else
+	    case $prefix in
+	      *\'*) qprefix=`echo "$prefix" | sed "s/'/'\\\\\\\\''/g"`;;
+	      *) qprefix=$prefix;;
+	    esac
+	    prefixes="$prefixes '$qprefix'"
+	  fi
+	fi
+	prefix=$prefix/
+      done
+
+      if test -n "$prefixes"; then
+	# Don't fail if two instances are running concurrently.
+	(umask $mkdir_umask &&
+	 eval "\$doit_exec \$mkdirprog $prefixes") ||
+	  test -d "$dstdir" || exit 1
+	obsolete_mkdir_used=true
+      fi
+    fi
+  fi
+
+  if test -n "$dir_arg"; then
+    { test -z "$chowncmd" || $doit $chowncmd "$dst"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } &&
+    { test "$obsolete_mkdir_used$chowncmd$chgrpcmd" = false ||
+      test -z "$chmodcmd" || $doit $chmodcmd $mode "$dst"; } || exit 1
+  else
+
+    # Make a couple of temp file names in the proper directory.
+    dsttmp=$dstdir/_inst.$$_
+    rmtmp=$dstdir/_rm.$$_
+
+    # Trap to clean up those temp files at exit.
+    trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0
+
+    # Copy the file name to the temp name.
+    (umask $cp_umask && $doit_exec $cpprog "$src" "$dsttmp") &&
+
+    # and set any options; do chmod last to preserve setuid bits.
+    #
+    # If any of these fail, we abort the whole thing.  If we want to
+    # ignore errors from any of these, just make sure not to ignore
+    # errors from the above "$doit $cpprog $src $dsttmp" command.
+    #
+    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
+    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
+    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&
+
+    # If -C, don't bother to copy if it wouldn't change the file.
+    if $copy_on_change &&
+       old=`LC_ALL=C ls -dlL "$dst"	2>/dev/null` &&
+       new=`LC_ALL=C ls -dlL "$dsttmp"	2>/dev/null` &&
+
+       eval "$initialize_posix_glob" &&
+       $posix_glob set -f &&
+       set X $old && old=:$2:$4:$5:$6 &&
+       set X $new && new=:$2:$4:$5:$6 &&
+       $posix_glob set +f &&
+
+       test "$old" = "$new" &&
+       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
+    then
+      rm -f "$dsttmp"
+    else
+      # Rename the file to the real destination.
+      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||
+
+      # The rename failed, perhaps because mv can't rename something else
+      # to itself, or perhaps because mv is so ancient that it does not
+      # support -f.
+      {
+	# Now remove or move aside any old file at destination location.
+	# We try this two ways since rm can't unlink itself on some
+	# systems and the destination file might be busy for other
+	# reasons.  In this case, the final cleanup might fail but the new
+	# file should still install successfully.
+	{
+	  test ! -f "$dst" ||
+	  $doit $rmcmd -f "$dst" 2>/dev/null ||
+	  { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
+	    { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; }
+	  } ||
+	  { echo "$0: cannot unlink or rename $dst" >&2
+	    (exit 1); exit 1
+	  }
+	} &&
+
+	# Now rename the file to the real destination.
+	$doit $mvcmd "$dsttmp" "$dst"
+      }
+    fi || exit 1
+
+    trap '' 0
+  fi
+done
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:

libpngpf.3

@@ -1,28 +1,806 @@
-.TH LIBPNGPF 3 "February 3, 2012"
+.TH LIBPNGPF 3 "February 18, 2010"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.0beta05
+libpng \- Portable Network Graphics (PNG) Reference Library 1.0.53rc01
 (private functions)
 .SH SYNOPSIS
-\fB#include \fI"pngpriv.h"
+\fB#include <png.h>\fP
 
 \fI\fB
 
-\fBAs of libpng version \fP\fI1.5.1\fP\fB, this section is no longer \fP\fImaintained\fP\fB, now \fIthat
+\fBvoid png_64bit_product (long \fP\fIv1\fP\fB, long \fP\fIv2\fP\fB, unsigned long \fI*hi_product,
 
-\fBthe private function prototypes are hidden in pngpriv.h and not \fIaccessible
+\fBunsigned long \fI*lo_product\fP\fB);\fP
 
-\fBto applications. Look in pngpriv.h for the prototypes and a short \fIdescription
+\fI\fB
 
-\fBof each \fIfunction.
+\fBvoid png_build_gamma_table (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_build_grayscale_palette (int \fP\fIbit_depth\fP\fB, png_colorp \fIpalette\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_calculate_crc (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIptr\fP\fB, png_size_t \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBint png_check_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_fixed_point \fP\fIint_white_x\fP\fB, png_fixed_point \fP\fIint_white_y\fP\fB, png_fixed_point \fP\fIint_red_x\fP\fB, png_fixed_point \fP\fIint_red_y\fP\fB, png_fixed_point \fP\fIint_green_x\fP\fB, png_fixed_point \fP\fIint_green_y\fP\fB, png_fixed_point \fP\fIint_blue_x\fP\fB, png_fixed_point \fIint_blue_y\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_check_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIwidth\fP\fB, png_uint_32 \fP\fIheight\fP\fB, int \fP\fIbit_depth\fP\fB, int \fP\fIcolor_type\fP\fB, int \fP\fIinterlace_type\fP\fB, int \fP\fIcompression_type\fP\fB, int \fIfilter_type\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_check_chunk_name (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIchunk_name\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBpng_size_t png_check_keyword (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIkey\fP\fB, png_charpp \fInew_key\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_combine_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fImask\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_correct_palette (png_structp \fP\fIpng_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, int \fInum_palette\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBint png_crc_error (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBint png_crc_finish (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIskip\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_crc_read (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuf\fP\fB, png_size_t \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBpng_voidp png_create_struct (int \fItype\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBpng_voidp png_create_struct_2 (int \fP\fItype\fP\fB, png_malloc_ptr \fP\fImalloc_fn\fP\fB, png_voidp \fImem_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_decompress_chunk (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIcomp_type\fP\fB, png_charp \fP\fIchunkdata\fP\fB, png_size_t \fP\fIchunklength\fP\fB, png_size_t \fP\fIprefix_length\fP\fB, png_size_t \fI*data_length\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_destroy_struct (png_voidp \fIstruct_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_destroy_struct_2 (png_voidp \fP\fIstruct_ptr\fP\fB, png_free_ptr \fP\fIfree_fn\fP\fB, png_voidp \fImem_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_background (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_16p \fP\fItrans_values\fP\fB, png_color_16p \fP\fIbackground\fP\fB, png_color_16p \fP\fIbackground_1\fP\fB, png_bytep \fP\fIgamma_table\fP\fB, png_bytep \fP\fIgamma_from_1\fP\fB, png_bytep \fP\fIgamma_to_1\fP\fB, png_uint_16pp \fP\fIgamma_16\fP\fB, png_uint_16pp \fP\fIgamma_16_from_1\fP\fB, png_uint_16pp \fP\fIgamma_16_to_1\fP\fB, int \fIgamma_shift\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_bgr (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_chop (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_dither (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fP\fIpalette_lookup\fP\fB, png_bytep \fIdither_lookup\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_expand (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_16p \fItrans_value\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_expand_palette (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_colorp \fP\fIpalette\fP\fB, png_bytep \fP\fItrans\fP\fB, int \fInum_trans\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_gamma (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fP\fIgamma_table\fP\fB, png_uint_16pp \fP\fIgamma_16_table\fP\fB, int \fIgamma_shift\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_gray_to_rgb (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_invert (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_pack (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_uint_32 \fIbit_depth\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_packswap (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_read_filler (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_uint_32 \fP\fIfiller\fP\fB, png_uint_32 \fIflags\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_read_interlace (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fP\fIpass\fP\fB, png_uint_32 \fItransformations\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_read_invert_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_read_swap_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_read_transformations (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBint png_do_rgb_to_gray (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_shift (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_8p \fIbit_depth\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_strip_filler (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_uint_32 \fIflags\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_swap (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_unpack (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_unshift (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_color_8p \fIsig_bits\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_write_interlace (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, int \fIpass\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_write_invert_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_write_swap_alpha (png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_do_write_transformations (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid *png_far_to_near (png_structp png_ptr,png_voidp \fP\fIptr\fP\fB, int \fIcheck\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_flush (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_bKGD (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_cHRM (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_gAMA (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_IEND (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_iTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_sRGB (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_unknown (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_handle_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_info_destroy (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_init_mmx_flags (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_init_read_transformations (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_process_IDAT_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIbuffer_length\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_process_some_data (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_check_crc (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_crc_finish (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_crc_skip (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_fill_buffer (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_handle_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_handle_unknown (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_handle_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_have_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_have_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_have_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIrow\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_process_row (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_read_chunk (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_read_end (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_read_IDAT (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_read_sig (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_read_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_read_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_restore_buffer (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIbuffer\fP\fB, png_size_t \fIbuffer_length\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_push_save_buffer (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBpng_uint_32 png_read_chunk_header (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_read_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_read_filter_row (png_structp \fP\fIpng_ptr\fP\fB, png_row_infop \fP\fIrow_info\fP\fB, png_bytep \fP\fIrow\fP\fB, png_bytep \fP\fIprev_row\fP\fB, int \fIfilter\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_read_finish_row (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_read_push_finish_row (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_read_start_row (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_read_transform_info (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fIinfo_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_reset_crc (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBint png_set_text_2 (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_textp \fP\fItext_ptr\fP\fB, int \fInum_text\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_cHRM (png_structp \fP\fIpng_ptr\fP\fB, double \fP\fIwhite_x\fP\fB, double \fP\fIwhite_y\fP\fB, double \fP\fIred_x\fP\fB, double \fP\fIred_y\fP\fB, double \fP\fIgreen_x\fP\fB, double \fP\fIgreen_y\fP\fB, double \fP\fIblue_x\fP\fB, double \fIblue_y\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_cHRM_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIwhite_x\fP\fB, png_uint_32 \fP\fIwhite_y\fP\fB, png_uint_32 \fP\fIred_x\fP\fB, png_uint_32 \fP\fIred_y\fP\fB, png_uint_32 \fP\fIgreen_x\fP\fB, png_uint_32 \fP\fIgreen_y\fP\fB, png_uint_32 \fP\fIblue_x\fP\fB, png_uint_32 \fIblue_y\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_data (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_filtered_row (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fIfiltered_row\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_find_filter (png_structp \fP\fIpng_ptr\fP\fB, png_row_infop \fIrow_info\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_finish_row (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_gAMA (png_structp \fP\fIpng_ptr\fP\fB, double \fIfile_gamma\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_gAMA_fixed (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fIint_file_gamma\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_hIST (png_structp \fP\fIpng_ptr\fP\fB, png_uint_16p \fP\fIhist\fP\fB, int \fInum_hist\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_iCCP (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIname\fP\fB, int \fP\fIcompression_type\fP\fB, png_charp \fP\fIprofile\fP\fB, int \fIproflen\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_IDAT (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fIdata\fP\fB, png_size_t \fIlength\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_IEND (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_IHDR (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIwidth\fP\fB, png_uint_32 \fP\fIheight\fP\fB, int \fP\fIbit_depth\fP\fB, int \fP\fIcolor_type\fP\fB, int \fP\fIcompression_type\fP\fB, int \fP\fIfilter_type\fP\fB, int \fIinterlace_type\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_iTXt (png_structp \fP\fIpng_ptr\fP\fB, int \fP\fIcompression\fP\fB, png_charp \fP\fIkey\fP\fB, png_charp \fP\fIlang\fP\fB, png_charp \fP\fItranslated_key\fP\fB, png_charp \fItext\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIx_offset\fP\fB, png_uint_32 \fP\fIy_offset\fP\fB, int \fIunit_type\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_pCAL (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIpurpose\fP\fB, png_int_32 \fP\fIX0\fP\fB, png_int_32 \fP\fIX1\fP\fB, int \fP\fItype\fP\fB, int \fP\fInparams\fP\fB, png_charp \fP\fIunits\fP\fB, png_charpp \fIparams\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_pHYs (png_structp \fP\fIpng_ptr\fP\fB, png_uint_32 \fP\fIx_pixels_per_unit\fP\fB, png_uint_32 \fP\fIy_pixels_per_unit\fP\fB, int \fIunit_type\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_PLTE (png_structp \fP\fIpng_ptr\fP\fB, png_colorp \fP\fIpalette\fP\fB, png_uint_32 \fInum_pal\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_sBIT (png_structp \fP\fIpng_ptr\fP\fB, png_color_8p \fP\fIsbit\fP\fB, int \fIcolor_type\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_sCAL (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIunit\fP\fB, double \fP\fIwidth\fP\fB, double \fIheight\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_sCAL_s (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIunit\fP\fB, png_charp \fP\fIwidth\fP\fB, png_charp \fIheight\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_sig (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_sRGB (png_structp \fP\fIpng_ptr\fP\fB, int \fIintent\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_sPLT (png_structp \fP\fIpng_ptr\fP\fB, png_spalette_p \fIpalette\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_start_row (png_structp \fIpng_ptr\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_tEXt (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIkey\fP\fB, png_charp \fP\fItext\fP\fB, png_size_t \fItext_len\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_tIME (png_structp \fP\fIpng_ptr\fP\fB, png_timep \fImod_time\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_tRNS (png_structp \fP\fIpng_ptr\fP\fB, png_bytep \fP\fItrans\fP\fB, png_color_16p \fP\fIvalues\fP\fB, int \fP\fInumber\fP\fB, int \fIcolor_type\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_write_zTXt (png_structp \fP\fIpng_ptr\fP\fB, png_charp \fP\fIkey\fP\fB, png_charp \fP\fItext\fP\fB, png_size_t \fP\fItext_len\fP\fB, int \fIcompression\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoidpf png_zalloc (voidpf \fP\fIpng_ptr\fP\fB, uInt \fP\fIitems\fP\fB, uInt \fIsize\fP\fB);\fP
+
+\fI\fB
+
+\fI\fB
+
+\fBvoid png_zfree (voidpf \fP\fIpng_ptr\fP\fB, voidpf \fIptr\fP\fB);\fP
+
+\fI\fB
 
 \fI\fB
 
 .SH DESCRIPTION
-The functions previously listed here are used privately by libpng and are not
-available for use by applications.  They are not "exported" to applications
-using shared libraries.
+The functions listed above are used privately by libpng
+and are not recommended for use by applications.  They are
+not "exported" to applications using shared libraries.  They
+are listed alphabetically here as an aid to libpng maintainers.
+See png.h for more information on these functions.
 
 .SH SEE ALSO
-.BR "png"(5), " libpng"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
+.IR libpng(3) ", " png(5)
 .SH AUTHOR
 Glenn Randers-Pehrson

missing

@@ -0,0 +1,376 @@
+#! /bin/sh
+# Common stub for a few missing GNU programs while installing.
+
+scriptversion=2009-04-28.21; # UTC
+
+# Copyright (C) 1996, 1997, 1999, 2000, 2002, 2003, 2004, 2005, 2006,
+# 2008, 2009 Free Software Foundation, Inc.
+# Originally by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# As a special exception to the GNU General Public License, if you
+# distribute this file as part of a program that contains a
+# configuration script generated by Autoconf, you may include it under
+# the same distribution terms that you use for the rest of that program.
+
+if test $# -eq 0; then
+  echo 1>&2 "Try \`$0 --help' for more information"
+  exit 1
+fi
+
+run=:
+sed_output='s/.* --output[ =]\([^ ]*\).*/\1/p'
+sed_minuso='s/.* -o \([^ ]*\).*/\1/p'
+
+# In the cases where this matters, `missing' is being run in the
+# srcdir already.
+if test -f configure.ac; then
+  configure_ac=configure.ac
+else
+  configure_ac=configure.in
+fi
+
+msg="missing on your system"
+
+case $1 in
+--run)
+  # Try to run requested program, and just exit if it succeeds.
+  run=
+  shift
+  "$@" && exit 0
+  # Exit code 63 means version mismatch.  This often happens
+  # when the user try to use an ancient version of a tool on
+  # a file that requires a minimum version.  In this case we
+  # we should proceed has if the program had been absent, or
+  # if --run hadn't been passed.
+  if test $? = 63; then
+    run=:
+    msg="probably too old"
+  fi
+  ;;
+
+  -h|--h|--he|--hel|--help)
+    echo "\
+$0 [OPTION]... PROGRAM [ARGUMENT]...
+
+Handle \`PROGRAM [ARGUMENT]...' for when PROGRAM is missing, or return an
+error status if there is no known handling for PROGRAM.
+
+Options:
+  -h, --help      display this help and exit
+  -v, --version   output version information and exit
+  --run           try to run the given command, and emulate it if it fails
+
+Supported PROGRAM values:
+  aclocal      touch file \`aclocal.m4'
+  autoconf     touch file \`configure'
+  autoheader   touch file \`config.h.in'
+  autom4te     touch the output file, or create a stub one
+  automake     touch all \`Makefile.in' files
+  bison        create \`y.tab.[ch]', if possible, from existing .[ch]
+  flex         create \`lex.yy.c', if possible, from existing .c
+  help2man     touch the output file
+  lex          create \`lex.yy.c', if possible, from existing .c
+  makeinfo     touch the output file
+  tar          try tar, gnutar, gtar, then tar without non-portable flags
+  yacc         create \`y.tab.[ch]', if possible, from existing .[ch]
+
+Version suffixes to PROGRAM as well as the prefixes \`gnu-', \`gnu', and
+\`g' are ignored when checking the name.
+
+Send bug reports to <bug-automake@gnu.org>."
+    exit $?
+    ;;
+
+  -v|--v|--ve|--ver|--vers|--versi|--versio|--version)
+    echo "missing $scriptversion (GNU Automake)"
+    exit $?
+    ;;
+
+  -*)
+    echo 1>&2 "$0: Unknown \`$1' option"
+    echo 1>&2 "Try \`$0 --help' for more information"
+    exit 1
+    ;;
+
+esac
+
+# normalize program name to check for.
+program=`echo "$1" | sed '
+  s/^gnu-//; t
+  s/^gnu//; t
+  s/^g//; t'`
+
+# Now exit if we have it, but it failed.  Also exit now if we
+# don't have it and --version was passed (most likely to detect
+# the program).  This is about non-GNU programs, so use $1 not
+# $program.
+case $1 in
+  lex*|yacc*)
+    # Not GNU programs, they don't have --version.
+    ;;
+
+  tar*)
+    if test -n "$run"; then
+       echo 1>&2 "ERROR: \`tar' requires --run"
+       exit 1
+    elif test "x$2" = "x--version" || test "x$2" = "x--help"; then
+       exit 1
+    fi
+    ;;
+
+  *)
+    if test -z "$run" && ($1 --version) > /dev/null 2>&1; then
+       # We have it, but it failed.
+       exit 1
+    elif test "x$2" = "x--version" || test "x$2" = "x--help"; then
+       # Could not run --version or --help.  This is probably someone
+       # running `$TOOL --version' or `$TOOL --help' to check whether
+       # $TOOL exists and not knowing $TOOL uses missing.
+       exit 1
+    fi
+    ;;
+esac
+
+# If it does not exist, or fails to run (possibly an outdated version),
+# try to emulate it.
+case $program in
+  aclocal*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+         you modified \`acinclude.m4' or \`${configure_ac}'.  You might want
+         to install the \`Automake' and \`Perl' packages.  Grab them from
+         any GNU archive site."
+    touch aclocal.m4
+    ;;
+
+  autoconf*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+         you modified \`${configure_ac}'.  You might want to install the
+         \`Autoconf' and \`GNU m4' packages.  Grab them from any GNU
+         archive site."
+    touch configure
+    ;;
+
+  autoheader*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+         you modified \`acconfig.h' or \`${configure_ac}'.  You might want
+         to install the \`Autoconf' and \`GNU m4' packages.  Grab them
+         from any GNU archive site."
+    files=`sed -n 's/^[ ]*A[CM]_CONFIG_HEADER(\([^)]*\)).*/\1/p' ${configure_ac}`
+    test -z "$files" && files="config.h"
+    touch_files=
+    for f in $files; do
+      case $f in
+      *:*) touch_files="$touch_files "`echo "$f" |
+				       sed -e 's/^[^:]*://' -e 's/:.*//'`;;
+      *) touch_files="$touch_files $f.in";;
+      esac
+    done
+    touch $touch_files
+    ;;
+
+  automake*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+         you modified \`Makefile.am', \`acinclude.m4' or \`${configure_ac}'.
+         You might want to install the \`Automake' and \`Perl' packages.
+         Grab them from any GNU archive site."
+    find . -type f -name Makefile.am -print |
+	   sed 's/\.am$/.in/' |
+	   while read f; do touch "$f"; done
+    ;;
+
+  autom4te*)
+    echo 1>&2 "\
+WARNING: \`$1' is needed, but is $msg.
+         You might have modified some files without having the
+         proper tools for further handling them.
+         You can get \`$1' as part of \`Autoconf' from any GNU
+         archive site."
+
+    file=`echo "$*" | sed -n "$sed_output"`
+    test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"`
+    if test -f "$file"; then
+	touch $file
+    else
+	test -z "$file" || exec >$file
+	echo "#! /bin/sh"
+	echo "# Created by GNU Automake missing as a replacement of"
+	echo "#  $ $@"
+	echo "exit 0"
+	chmod +x $file
+	exit 1
+    fi
+    ;;
+
+  bison*|yacc*)
+    echo 1>&2 "\
+WARNING: \`$1' $msg.  You should only need it if
+         you modified a \`.y' file.  You may need the \`Bison' package
+         in order for those modifications to take effect.  You can get
+         \`Bison' from any GNU archive site."
+    rm -f y.tab.c y.tab.h
+    if test $# -ne 1; then
+        eval LASTARG="\${$#}"
+	case $LASTARG in
+	*.y)
+	    SRCFILE=`echo "$LASTARG" | sed 's/y$/c/'`
+	    if test -f "$SRCFILE"; then
+	         cp "$SRCFILE" y.tab.c
+	    fi
+	    SRCFILE=`echo "$LASTARG" | sed 's/y$/h/'`
+	    if test -f "$SRCFILE"; then
+	         cp "$SRCFILE" y.tab.h
+	    fi
+	  ;;
+	esac
+    fi
+    if test ! -f y.tab.h; then
+	echo >y.tab.h
+    fi
+    if test ! -f y.tab.c; then
+	echo 'main() { return 0; }' >y.tab.c
+    fi
+    ;;
+
+  lex*|flex*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+         you modified a \`.l' file.  You may need the \`Flex' package
+         in order for those modifications to take effect.  You can get
+         \`Flex' from any GNU archive site."
+    rm -f lex.yy.c
+    if test $# -ne 1; then
+        eval LASTARG="\${$#}"
+	case $LASTARG in
+	*.l)
+	    SRCFILE=`echo "$LASTARG" | sed 's/l$/c/'`
+	    if test -f "$SRCFILE"; then
+	         cp "$SRCFILE" lex.yy.c
+	    fi
+	  ;;
+	esac
+    fi
+    if test ! -f lex.yy.c; then
+	echo 'main() { return 0; }' >lex.yy.c
+    fi
+    ;;
+
+  help2man*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+	 you modified a dependency of a manual page.  You may need the
+	 \`Help2man' package in order for those modifications to take
+	 effect.  You can get \`Help2man' from any GNU archive site."
+
+    file=`echo "$*" | sed -n "$sed_output"`
+    test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"`
+    if test -f "$file"; then
+	touch $file
+    else
+	test -z "$file" || exec >$file
+	echo ".ab help2man is required to generate this page"
+	exit $?
+    fi
+    ;;
+
+  makeinfo*)
+    echo 1>&2 "\
+WARNING: \`$1' is $msg.  You should only need it if
+         you modified a \`.texi' or \`.texinfo' file, or any other file
+         indirectly affecting the aspect of the manual.  The spurious
+         call might also be the consequence of using a buggy \`make' (AIX,
+         DU, IRIX).  You might want to install the \`Texinfo' package or
+         the \`GNU make' package.  Grab either from any GNU archive site."
+    # The file to touch is that specified with -o ...
+    file=`echo "$*" | sed -n "$sed_output"`
+    test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"`
+    if test -z "$file"; then
+      # ... or it is the one specified with @setfilename ...
+      infile=`echo "$*" | sed 's/.* \([^ ]*\) *$/\1/'`
+      file=`sed -n '
+	/^@setfilename/{
+	  s/.* \([^ ]*\) *$/\1/
+	  p
+	  q
+	}' $infile`
+      # ... or it is derived from the source name (dir/f.texi becomes f.info)
+      test -z "$file" && file=`echo "$infile" | sed 's,.*/,,;s,.[^.]*$,,'`.info
+    fi
+    # If the file does not exist, the user really needs makeinfo;
+    # let's fail without touching anything.
+    test -f $file || exit 1
+    touch $file
+    ;;
+
+  tar*)
+    shift
+
+    # We have already tried tar in the generic part.
+    # Look for gnutar/gtar before invocation to avoid ugly error
+    # messages.
+    if (gnutar --version > /dev/null 2>&1); then
+       gnutar "$@" && exit 0
+    fi
+    if (gtar --version > /dev/null 2>&1); then
+       gtar "$@" && exit 0
+    fi
+    firstarg="$1"
+    if shift; then
+	case $firstarg in
+	*o*)
+	    firstarg=`echo "$firstarg" | sed s/o//`
+	    tar "$firstarg" "$@" && exit 0
+	    ;;
+	esac
+	case $firstarg in
+	*h*)
+	    firstarg=`echo "$firstarg" | sed s/h//`
+	    tar "$firstarg" "$@" && exit 0
+	    ;;
+	esac
+    fi
+
+    echo 1>&2 "\
+WARNING: I can't seem to be able to run \`tar' with the given arguments.
+         You may want to install GNU tar or Free paxutils, or check the
+         command line arguments."
+    exit 1
+    ;;
+
+  *)
+    echo 1>&2 "\
+WARNING: \`$1' is needed, and is $msg.
+         You might have modified some files without having the
+         proper tools for further handling them.  Check the \`README' file,
+         it often tells you about the needed prerequisites for installing
+         this package.  You may also peek at any GNU archive site, in case
+         some other package would contain this missing \`$1' program."
+    exit 1
+    ;;
+esac
+
+exit 0
+
+# Local variables:
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:

mkinstalldirs

@@ -0,0 +1,162 @@
+#! /bin/sh
+# mkinstalldirs --- make directory hierarchy
+
+scriptversion=2009-04-28.21; # UTC
+
+# Original author: Noah Friedman <friedman@prep.ai.mit.edu>
+# Created: 1993-05-16
+# Public domain.
+#
+# This file is maintained in Automake, please report
+# bugs to <bug-automake@gnu.org> or send patches to
+# <automake-patches@gnu.org>.
+
+nl='
+'
+IFS=" ""	$nl"
+errstatus=0
+dirmode=
+
+usage="\
+Usage: mkinstalldirs [-h] [--help] [--version] [-m MODE] DIR ...
+
+Create each directory DIR (with mode MODE, if specified), including all
+leading file name components.
+
+Report bugs to <bug-automake@gnu.org>."
+
+# process command line arguments
+while test $# -gt 0 ; do
+  case $1 in
+    -h | --help | --h*)         # -h for help
+      echo "$usage"
+      exit $?
+      ;;
+    -m)                         # -m PERM arg
+      shift
+      test $# -eq 0 && { echo "$usage" 1>&2; exit 1; }
+      dirmode=$1
+      shift
+      ;;
+    --version)
+      echo "$0 $scriptversion"
+      exit $?
+      ;;
+    --)                         # stop option processing
+      shift
+      break
+      ;;
+    -*)                         # unknown option
+      echo "$usage" 1>&2
+      exit 1
+      ;;
+    *)                          # first non-opt arg
+      break
+      ;;
+  esac
+done
+
+for file
+do
+  if test -d "$file"; then
+    shift
+  else
+    break
+  fi
+done
+
+case $# in
+  0) exit 0 ;;
+esac
+
+# Solaris 8's mkdir -p isn't thread-safe.  If you mkdir -p a/b and
+# mkdir -p a/c at the same time, both will detect that a is missing,
+# one will create a, then the other will try to create a and die with
+# a "File exists" error.  This is a problem when calling mkinstalldirs
+# from a parallel make.  We use --version in the probe to restrict
+# ourselves to GNU mkdir, which is thread-safe.
+case $dirmode in
+  '')
+    if mkdir -p --version . >/dev/null 2>&1 && test ! -d ./--version; then
+      echo "mkdir -p -- $*"
+      exec mkdir -p -- "$@"
+    else
+      # On NextStep and OpenStep, the `mkdir' command does not
+      # recognize any option.  It will interpret all options as
+      # directories to create, and then abort because `.' already
+      # exists.
+      test -d ./-p && rmdir ./-p
+      test -d ./--version && rmdir ./--version
+    fi
+    ;;
+  *)
+    if mkdir -m "$dirmode" -p --version . >/dev/null 2>&1 &&
+       test ! -d ./--version; then
+      echo "mkdir -m $dirmode -p -- $*"
+      exec mkdir -m "$dirmode" -p -- "$@"
+    else
+      # Clean up after NextStep and OpenStep mkdir.
+      for d in ./-m ./-p ./--version "./$dirmode";
+      do
+        test -d $d && rmdir $d
+      done
+    fi
+    ;;
+esac
+
+for file
+do
+  case $file in
+    /*) pathcomp=/ ;;
+    *)  pathcomp= ;;
+  esac
+  oIFS=$IFS
+  IFS=/
+  set fnord $file
+  shift
+  IFS=$oIFS
+
+  for d
+  do
+    test "x$d" = x && continue
+
+    pathcomp=$pathcomp$d
+    case $pathcomp in
+      -*) pathcomp=./$pathcomp ;;
+    esac
+
+    if test ! -d "$pathcomp"; then
+      echo "mkdir $pathcomp"
+
+      mkdir "$pathcomp" || lasterr=$?
+
+      if test ! -d "$pathcomp"; then
+	errstatus=$lasterr
+      else
+	if test ! -z "$dirmode"; then
+	  echo "chmod $dirmode $pathcomp"
+	  lasterr=
+	  chmod "$dirmode" "$pathcomp" || lasterr=$?
+
+	  if test ! -z "$lasterr"; then
+	    errstatus=$lasterr
+	  fi
+	fi
+      fi
+    fi
+
+    pathcomp=$pathcomp/
+  done
+done
+
+exit $errstatus
+
+# Local Variables:
+# mode: shell-script
+# sh-indentation: 2
+# eval: (add-hook 'write-file-hooks 'time-stamp)
+# time-stamp-start: "scriptversion="
+# time-stamp-format: "%:y-%02m-%02d.%02H"
+# time-stamp-time-zone: "UTC"
+# time-stamp-end: "; # UTC"
+# End:

png.5

@@ -1,4 +1,4 @@
-.TH PNG 5 "February 3, 2012"
+.TH PNG 5 "February 18, 2010"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
@@ -18,7 +18,7 @@ gamma and chromaticity data for improved color matching on heterogeneous
 platforms.
 
 .SH "SEE ALSO"
-.BR "libpng"(3), " libpngpf"(3), " zlib"(3), " deflate"(5), " " and " zlib"(5)
+.IR libpng(3) ", " zlib(3) ", " deflate(5) ", and " zlib(5)
 .LP
 PNG specification (second edition), November 2003:
 .IP
@@ -35,7 +35,7 @@ PNG 1.0 specification, October 1996:
 RFC 2083
 .IP
 .br
-ftp://ds.internic.net/rfc/rfc2083.txt
+ftp://ftp.rfc-editor.org:/in-notes/rfc2083.txt
 .br
 or (as a W3C Recommendation) at
 .br

pngdebug.h

@@ -1,157 +0,0 @@
-
-/* pngdebug.h - Debugging macros for libpng, also used in pngtest.c
- *
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * Last changed in libpng 1.5.0 [January 6, 2011]
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
-/* Define PNG_DEBUG at compile time for debugging information.  Higher
- * numbers for PNG_DEBUG mean more debugging information.  This has
- * only been added since version 0.95 so it is not implemented throughout
- * libpng yet, but more support will be added as needed.
- *
- * png_debug[1-2]?(level, message ,arg{0-2})
- *   Expands to a statement (either a simple expression or a compound
- *   do..while(0) statement) that outputs a message with parameter
- *   substitution if PNG_DEBUG is defined to 2 or more.  If PNG_DEBUG
- *   is undefined, 0 or 1 every png_debug expands to a simple expression
- *   (actually ((void)0)).
- *
- *   level: level of detail of message, starting at 0.  A level 'n'
- *          message is preceded by 'n' tab characters (not implemented
- *          on Microsoft compilers unless PNG_DEBUG_FILE is also
- *          defined, to allow debug DLL compilation with no standard IO).
- *   message: a printf(3) style text string.  A trailing '\n' is added
- *            to the message.
- *   arg: 0 to 2 arguments for printf(3) style substitution in message.
- */
-#ifndef PNGDEBUG_H
-#define PNGDEBUG_H
-/* These settings control the formatting of messages in png.c and pngerror.c */
-/* Moved to pngdebug.h at 1.5.0 */
-#  ifndef PNG_LITERAL_SHARP
-#    define PNG_LITERAL_SHARP 0x23
-#  endif
-#  ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
-#    define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
-#  endif
-#  ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
-#    define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
-#  endif
-#  ifndef PNG_STRING_NEWLINE
-#    define PNG_STRING_NEWLINE "\n"
-#  endif
-
-#ifdef PNG_DEBUG
-#  if (PNG_DEBUG > 0)
-#    if !defined(PNG_DEBUG_FILE) && defined(_MSC_VER)
-#      include <crtdbg.h>
-#      if (PNG_DEBUG > 1)
-#        ifndef _DEBUG
-#          define _DEBUG
-#        endif
-#        ifndef png_debug
-#          define png_debug(l,m)  _RPT0(_CRT_WARN,m PNG_STRING_NEWLINE)
-#        endif
-#        ifndef png_debug1
-#          define png_debug1(l,m,p1)  _RPT1(_CRT_WARN,m PNG_STRING_NEWLINE,p1)
-#        endif
-#        ifndef png_debug2
-#          define png_debug2(l,m,p1,p2) \
-             _RPT2(_CRT_WARN,m PNG_STRING_NEWLINE,p1,p2)
-#        endif
-#      endif
-#    else /* PNG_DEBUG_FILE || !_MSC_VER */
-#      ifndef PNG_STDIO_SUPPORTED
-#        include <stdio.h> /* not included yet */
-#      endif
-#      ifndef PNG_DEBUG_FILE
-#        define PNG_DEBUG_FILE stderr
-#      endif /* PNG_DEBUG_FILE */
-
-#      if (PNG_DEBUG > 1)
-/* Note: ["%s"m PNG_STRING_NEWLINE] probably does not work on
- * non-ISO compilers
- */
-#        ifdef __STDC__
-#          ifndef png_debug
-#            define png_debug(l,m) \
-       do { \
-       int num_tabs=l; \
-       fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
-         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":"")))); \
-       } while (0)
-#          endif
-#          ifndef png_debug1
-#            define png_debug1(l,m,p1) \
-       do { \
-       int num_tabs=l; \
-       fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
-         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1); \
-       } while (0)
-#          endif
-#          ifndef png_debug2
-#            define png_debug2(l,m,p1,p2) \
-       do { \
-       int num_tabs=l; \
-       fprintf(PNG_DEBUG_FILE,"%s"m PNG_STRING_NEWLINE,(num_tabs==1 ? "\t" : \
-         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))),p1,p2); \
-       } while (0)
-#          endif
-#        else /* __STDC __ */
-#          ifndef png_debug
-#            define png_debug(l,m) \
-       do { \
-       int num_tabs=l; \
-       char format[256]; \
-       snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
-         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
-         m,PNG_STRING_NEWLINE); \
-       fprintf(PNG_DEBUG_FILE,format); \
-       } while (0)
-#          endif
-#          ifndef png_debug1
-#            define png_debug1(l,m,p1) \
-       do { \
-       int num_tabs=l; \
-       char format[256]; \
-       snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
-         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
-         m,PNG_STRING_NEWLINE); \
-       fprintf(PNG_DEBUG_FILE,format,p1); \
-       } while (0)
-#          endif
-#          ifndef png_debug2
-#            define png_debug2(l,m,p1,p2) \
-       do { \
-       int num_tabs=l; \
-       char format[256]; \
-       snprintf(format,256,"%s%s%s",(num_tabs==1 ? "\t" : \
-         (num_tabs==2 ? "\t\t":(num_tabs>2 ? "\t\t\t":""))), \
-         m,PNG_STRING_NEWLINE); \
-       fprintf(PNG_DEBUG_FILE,format,p1,p2); \
-       } while (0)
-#          endif
-#        endif /* __STDC __ */
-#      endif /* (PNG_DEBUG > 1) */
-
-#    endif /* _MSC_VER */
-#  endif /* (PNG_DEBUG > 0) */
-#endif /* PNG_DEBUG */
-#ifndef png_debug
-#  define png_debug(l, m) ((void)0)
-#endif
-#ifndef png_debug1
-#  define png_debug1(l, m, p1) ((void)0)
-#endif
-#ifndef png_debug2
-#  define png_debug2(l, m, p1, p2) ((void)0)
-#endif
-#endif /* PNGDEBUG_H */

pngerror.c

@@ -1,8 +1,8 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.41 [December 3, 2009]
+ * Copyright (c) 1998-2009 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
@@ -16,17 +16,18 @@
  * at each function.
  */
 
-#include "pngpriv.h"
-
+#define PNG_INTERNAL
+#define PNG_NO_PEDANTIC_WARNINGS
+#include "png.h"
 #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
 
-static PNG_FUNCTION(void, png_default_error,PNGARG((png_const_structrp png_ptr,
-    png_const_charp error_message)),PNG_NORETURN);
-
+static void /* PRIVATE */
+png_default_error PNGARG((png_structp png_ptr,
+  png_const_charp error_message)) PNG_NORETURN;
 #ifdef PNG_WARNINGS_SUPPORTED
 static void /* PRIVATE */
-png_default_warning PNGARG((png_const_structrp png_ptr,
-   png_const_charp warning_message));
+png_default_warning PNGARG((png_structp png_ptr,
+  png_const_charp warning_message));
 #endif /* PNG_WARNINGS_SUPPORTED */
 
 /* This function is called whenever there is a fatal error.  This function
@@ -35,176 +36,66 @@ png_default_warning PNGARG((png_const_structrp png_ptr,
  * to replace the error function at run-time.
  */
 #ifdef PNG_ERROR_TEXT_SUPPORTED
-PNG_FUNCTION(void,PNGAPI
-png_error,(png_const_structrp png_ptr, png_const_charp error_message),
-   PNG_NORETURN)
+void PNGAPI
+png_error(png_structp png_ptr, png_const_charp error_message)
 {
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
    char msg[16];
    if (png_ptr != NULL)
    {
-      if (png_ptr->flags&
-         (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
-      {
-         if (*error_message == PNG_LITERAL_SHARP)
-         {
-            /* Strip "#nnnn " from beginning of error message. */
-            int offset;
-            for (offset = 1; offset<15; offset++)
-               if (error_message[offset] == ' ')
+     if (png_ptr->flags&
+       (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+     {
+       if (*error_message == PNG_LITERAL_SHARP)
+       {
+           /* Strip "#nnnn " from beginning of error message. */
+           int offset;
+           for (offset = 1; offset<15; offset++)
+              if (error_message[offset] == ' ')
                   break;
-
-            if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
-            {
-               int i;
-               for (i = 0; i < offset - 1; i++)
-                  msg[i] = error_message[i + 1];
-               msg[i - 1] = '\0';
-               error_message = msg;
-            }
-
-            else
-               error_message += offset;
-      }
-
-      else
-      {
-         if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
-         {
-            msg[0] = '0';
-            msg[1] = '\0';
-            error_message = msg;
-         }
+           if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+           {
+              int i;
+              for (i = 0; i < offset - 1; i++)
+                 msg[i] = error_message[i + 1];
+              msg[i - 1] = '\0';
+              error_message = msg;
+           }
+           else
+              error_message += offset;
+       }
+       else
+       {
+           if (png_ptr->flags&PNG_FLAG_STRIP_ERROR_TEXT)
+           {
+              msg[0] = '0';
+              msg[1] = '\0';
+              error_message = msg;
+           }
        }
      }
    }
 #endif
    if (png_ptr != NULL && png_ptr->error_fn != NULL)
-      (*(png_ptr->error_fn))(png_constcast(png_structrp,png_ptr), error_message);
+      (*(png_ptr->error_fn))(png_ptr, error_message);
 
    /* If the custom handler doesn't exist, or if it returns,
       use the default handler, which will not return. */
    png_default_error(png_ptr, error_message);
 }
 #else
-PNG_FUNCTION(void,PNGAPI
-png_err,(png_const_structrp png_ptr),PNG_NORETURN)
+void PNGAPI
+png_err(png_structp png_ptr)
 {
-   /* Prior to 1.5.2 the error_fn received a NULL pointer, expressed
-    * erroneously as '\0', instead of the empty string "".  This was
-    * apparently an error, introduced in libpng-1.2.20, and png_default_error
-    * will crash in this case.
-    */
    if (png_ptr != NULL && png_ptr->error_fn != NULL)
-      (*(png_ptr->error_fn))(png_constcast(png_structrp,png_ptr), "");
+      (*(png_ptr->error_fn))(png_ptr, '\0');
 
    /* If the custom handler doesn't exist, or if it returns,
       use the default handler, which will not return. */
-   png_default_error(png_ptr, "");
+   png_default_error(png_ptr, '\0');
 }
 #endif /* PNG_ERROR_TEXT_SUPPORTED */
 
-/* Utility to safely appends strings to a buffer.  This never errors out so
- * error checking is not required in the caller.
- */
-size_t
-png_safecat(png_charp buffer, size_t bufsize, size_t pos,
-   png_const_charp string)
-{
-   if (buffer != NULL && pos < bufsize)
-   {
-      if (string != NULL)
-         while (*string != '\0' && pos < bufsize-1)
-           buffer[pos++] = *string++;
-
-      buffer[pos] = '\0';
-   }
-
-   return pos;
-}
-
-#if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_TIME_RFC1123_SUPPORTED)
-/* Utility to dump an unsigned value into a buffer, given a start pointer and
- * and end pointer (which should point just *beyond* the end of the buffer!)
- * Returns the pointer to the start of the formatted string.
- */
-png_charp
-png_format_number(png_const_charp start, png_charp end, int format,
-   png_alloc_size_t number)
-{
-   int count = 0;    /* number of digits output */
-   int mincount = 1; /* minimum number required */
-   int output = 0;   /* digit output (for the fixed point format) */
-
-   *--end = '\0';
-
-   /* This is written so that the loop always runs at least once, even with
-    * number zero.
-    */
-   while (end > start && (number != 0 || count < mincount))
-   {
-
-      static const char digits[] = "0123456789ABCDEF";
-
-      switch (format)
-      {
-         case PNG_NUMBER_FORMAT_fixed:
-            /* Needs five digits (the fraction) */
-            mincount = 5;
-            if (output || number % 10 != 0)
-            {
-               *--end = digits[number % 10];
-               output = 1;
-            }
-            number /= 10;
-            break;
-
-         case PNG_NUMBER_FORMAT_02u:
-            /* Expects at least 2 digits. */
-            mincount = 2;
-            /* fall through */
-
-         case PNG_NUMBER_FORMAT_u:
-            *--end = digits[number % 10];
-            number /= 10;
-            break;
-
-         case PNG_NUMBER_FORMAT_02x:
-            /* This format expects at least two digits */
-            mincount = 2;
-            /* fall through */
-
-         case PNG_NUMBER_FORMAT_x:
-            *--end = digits[number & 0xf];
-            number >>= 4;
-            break;
-
-         default: /* an error */
-            number = 0;
-            break;
-      }
-
-      /* Keep track of the number of digits added */
-      ++count;
-
-      /* Float a fixed number here: */
-      if (format == PNG_NUMBER_FORMAT_fixed) if (count == 5) if (end > start)
-      {
-         /* End of the fraction, but maybe nothing was output?  In that case
-          * drop the decimal point.  If the number is a true zero handle that
-          * here.
-          */
-         if (output)
-            *--end = '.';
-         else if (number == 0) /* and !output */
-            *--end = '0';
-      }
-   }
-
-   return end;
-}
-#endif
-
 #ifdef PNG_WARNINGS_SUPPORTED
 /* This function is called whenever there is a non-fatal error.  This function
  * should not be changed.  If there is a need to handle warnings differently,
@@ -212,156 +103,39 @@ png_format_number(png_const_charp start, png_charp end, int format,
  * png_set_error_fn() to replace the warning function at run-time.
  */
 void PNGAPI
-png_warning(png_const_structrp png_ptr, png_const_charp warning_message)
+png_warning(png_structp png_ptr, png_const_charp warning_message)
 {
    int offset = 0;
    if (png_ptr != NULL)
    {
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
    if (png_ptr->flags&
-       (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
+     (PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))
 #endif
-      {
-         if (*warning_message == PNG_LITERAL_SHARP)
-         {
-            for (offset = 1; offset < 15; offset++)
-               if (warning_message[offset] == ' ')
+     {
+       if (*warning_message == PNG_LITERAL_SHARP)
+       {
+           for (offset = 1; offset < 15; offset++)
+              if (warning_message[offset] == ' ')
                   break;
-         }
-      }
+       }
+     }
    }
    if (png_ptr != NULL && png_ptr->warning_fn != NULL)
-      (*(png_ptr->warning_fn))(png_constcast(png_structrp,png_ptr),
-         warning_message + offset);
+      (*(png_ptr->warning_fn))(png_ptr, warning_message + offset);
    else
       png_default_warning(png_ptr, warning_message + offset);
 }
-
-/* These functions support 'formatted' warning messages with up to
- * PNG_WARNING_PARAMETER_COUNT parameters.  In the format string the parameter
- * is introduced by @<number>, where 'number' starts at 1.  This follows the
- * standard established by X/Open for internationalizable error messages.
- */
-void
-png_warning_parameter(png_warning_parameters p, int number,
-   png_const_charp string)
-{
-   if (number > 0 && number <= PNG_WARNING_PARAMETER_COUNT)
-      (void)png_safecat(p[number-1], (sizeof p[number-1]), 0, string);
-}
-
-void
-png_warning_parameter_unsigned(png_warning_parameters p, int number, int format,
-   png_alloc_size_t value)
-{
-   char buffer[PNG_NUMBER_BUFFER_SIZE];
-   png_warning_parameter(p, number, PNG_FORMAT_NUMBER(buffer, format, value));
-}
-
-void
-png_warning_parameter_signed(png_warning_parameters p, int number, int format,
-   png_int_32 value)
-{
-   png_alloc_size_t u;
-   png_charp str;
-   char buffer[PNG_NUMBER_BUFFER_SIZE];
-
-   /* Avoid overflow by doing the negate in a png_alloc_size_t: */
-   u = (png_alloc_size_t)value;
-   if (value < 0)
-      u = ~u + 1;
-
-   str = PNG_FORMAT_NUMBER(buffer, format, u);
-
-   if (value < 0 && str > buffer)
-      *--str = '-';
-
-   png_warning_parameter(p, number, str);
-}
-
-void
-png_formatted_warning(png_const_structrp png_ptr, png_warning_parameters p,
-   png_const_charp message)
-{
-   /* The internal buffer is just 128 bytes - enough for all our messages,
-    * overflow doesn't happen because this code checks!
-    */
-   size_t i = 0; /* Index in the msg[] buffer: */
-   char msg[128];
-
-   /* Each iteration through the following loop writes at most one character
-    * to msg[i++] then returns here to validate that there is still space for
-    * the trailing '\0'.  It may (in the case of a parameter) read more than
-    * one character from message[]; it must check for '\0' and continue to the
-    * test if it finds the end of string.
-    */
-   while (i<(sizeof msg)-1 && *message != '\0')
-   {
-      /* '@' at end of string is now just printed (previously it was skipped);
-       * it is an error in the calling code to terminate the string with @.
-       */
-      if (p != NULL && *message == '@' && message[1] != '\0')
-      {
-         int parameter_char = *++message; /* Consume the '@' */
-         static const char valid_parameters[] = "123456789";
-         int parameter = 0;
-
-         /* Search for the parameter digit, the index in the string is the
-          * parameter to use.
-          */
-         while (valid_parameters[parameter] != parameter_char &&
-            valid_parameters[parameter] != '\0')
-            ++parameter;
-
-         /* If the parameter digit is out of range it will just get printed. */
-         if (parameter < PNG_WARNING_PARAMETER_COUNT)
-         {
-            /* Append this parameter */
-            png_const_charp parm = p[parameter];
-            png_const_charp pend = p[parameter] + (sizeof p[parameter]);
-
-            /* No need to copy the trailing '\0' here, but there is no guarantee
-             * that parm[] has been initialized, so there is no guarantee of a
-             * trailing '\0':
-             */
-            while (i<(sizeof msg)-1 && *parm != '\0' && parm < pend)
-               msg[i++] = *parm++;
-
-            /* Consume the parameter digit too: */
-            ++message;
-            continue;
-         }
-
-         /* else not a parameter and there is a character after the @ sign; just
-          * copy that.  This is known not to be '\0' because of the test above.
-          */
-      }
-
-      /* At this point *message can't be '\0', even in the bad parameter case
-       * above where there is a lone '@' at the end of the message string.
-       */
-      msg[i++] = *message++;
-   }
-
-   /* i is always less than (sizeof msg), so: */
-   msg[i] = '\0';
-
-   /* And this is the formatted message. It may be larger than
-    * PNG_MAX_ERROR_TEXT, but that is only used for 'chunk' errors and these
-    * are not (currently) formatted.
-    */
-   png_warning(png_ptr, msg);
-}
 #endif /* PNG_WARNINGS_SUPPORTED */
 
 #ifdef PNG_BENIGN_ERRORS_SUPPORTED
 void PNGAPI
-png_benign_error(png_const_structrp png_ptr, png_const_charp error_message)
+png_benign_error(png_structp png_ptr, png_const_charp error_message)
 {
   if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN)
-     png_warning(png_ptr, error_message);
+    png_warning(png_ptr, error_message);
   else
-     png_error(png_ptr, error_message);
+    png_error(png_ptr, error_message);
 }
 #endif
 
@@ -380,17 +154,14 @@ static PNG_CONST char png_digit[16] = {
 #define PNG_MAX_ERROR_TEXT 64
 #if defined(PNG_WARNINGS_SUPPORTED) || defined(PNG_ERROR_TEXT_SUPPORTED)
 static void /* PRIVATE */
-png_format_buffer(png_const_structrp png_ptr, png_charp buffer, png_const_charp
-    error_message)
+png_format_buffer(png_structp png_ptr, png_charp buffer, png_const_charp
+   error_message)
 {
-   png_uint_32 chunk_name = png_ptr->chunk_name;
-   int iout = 0, ishift = 24;
+   int iout = 0, iin = 0;
 
-   while (ishift >= 0)
+   while (iin < 4)
    {
-      int c = (int)(chunk_name >> ishift) & 0xff;
-
-      ishift -= 8;
+      int c = png_ptr->chunk_name[iin++];
       if (isnonalpha(c))
       {
          buffer[iout++] = PNG_LITERAL_LEFT_SQUARE_BRACKET;
@@ -398,61 +169,50 @@ png_format_buffer(png_const_structrp png_ptr, png_charp buffer, png_const_charp
          buffer[iout++] = png_digit[c & 0x0f];
          buffer[iout++] = PNG_LITERAL_RIGHT_SQUARE_BRACKET;
       }
-
       else
       {
-         buffer[iout++] = (char)c;
+         buffer[iout++] = (png_byte)c;
       }
    }
 
    if (error_message == NULL)
       buffer[iout] = '\0';
-
    else
    {
-      int iin = 0;
-
       buffer[iout++] = ':';
       buffer[iout++] = ' ';
-
-      while (iin < PNG_MAX_ERROR_TEXT-1 && error_message[iin] != '\0')
-         buffer[iout++] = error_message[iin++];
-
-      /* iin < PNG_MAX_ERROR_TEXT, so the following is safe: */
-      buffer[iout] = '\0';
+      png_memcpy(buffer + iout, error_message, PNG_MAX_ERROR_TEXT);
+      buffer[iout + PNG_MAX_ERROR_TEXT - 1] = '\0';
    }
 }
-#endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */
 
-#if defined(PNG_READ_SUPPORTED) && defined(PNG_ERROR_TEXT_SUPPORTED)
-PNG_FUNCTION(void,PNGAPI
-png_chunk_error,(png_const_structrp png_ptr, png_const_charp error_message),
-   PNG_NORETURN)
+#ifdef PNG_READ_SUPPORTED
+void PNGAPI
+png_chunk_error(png_structp png_ptr, png_const_charp error_message)
 {
    char msg[18+PNG_MAX_ERROR_TEXT];
    if (png_ptr == NULL)
-      png_error(png_ptr, error_message);
-
+     png_error(png_ptr, error_message);
    else
    {
-      png_format_buffer(png_ptr, msg, error_message);
-      png_error(png_ptr, msg);
+     png_format_buffer(png_ptr, msg, error_message);
+     png_error(png_ptr, msg);
    }
 }
-#endif /* PNG_READ_SUPPORTED && PNG_ERROR_TEXT_SUPPORTED */
+#endif /* PNG_READ_SUPPORTED */
+#endif /* PNG_WARNINGS_SUPPORTED || PNG_ERROR_TEXT_SUPPORTED */
 
 #ifdef PNG_WARNINGS_SUPPORTED
 void PNGAPI
-png_chunk_warning(png_const_structrp png_ptr, png_const_charp warning_message)
+png_chunk_warning(png_structp png_ptr, png_const_charp warning_message)
 {
    char msg[18+PNG_MAX_ERROR_TEXT];
    if (png_ptr == NULL)
-      png_warning(png_ptr, warning_message);
-
+     png_warning(png_ptr, warning_message);
    else
    {
-      png_format_buffer(png_ptr, msg, warning_message);
-      png_warning(png_ptr, msg);
+     png_format_buffer(png_ptr, msg, warning_message);
+     png_warning(png_ptr, msg);
    }
 }
 #endif /* PNG_WARNINGS_SUPPORTED */
@@ -460,214 +220,78 @@ png_chunk_warning(png_const_structrp png_ptr, png_const_charp warning_message)
 #ifdef PNG_READ_SUPPORTED
 #ifdef PNG_BENIGN_ERRORS_SUPPORTED
 void PNGAPI
-png_chunk_benign_error(png_const_structrp png_ptr, png_const_charp error_message)
+png_chunk_benign_error(png_structp png_ptr, png_const_charp error_message)
 {
-   if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN)
-      png_chunk_warning(png_ptr, error_message);
-
-   else
-      png_chunk_error(png_ptr, error_message);
+  if (png_ptr->flags & PNG_FLAG_BENIGN_ERRORS_WARN)
+    png_chunk_warning(png_ptr, error_message);
+  else
+    png_chunk_error(png_ptr, error_message);
 }
 #endif
 #endif /* PNG_READ_SUPPORTED */
 
-#ifdef PNG_ERROR_TEXT_SUPPORTED
-#ifdef PNG_FLOATING_POINT_SUPPORTED
-PNG_FUNCTION(void,
-png_fixed_error,(png_const_structrp png_ptr, png_const_charp name),PNG_NORETURN)
-{
-#  define fixed_message "fixed point overflow in "
-#  define fixed_message_ln ((sizeof fixed_message)-1)
-   int  iin;
-   char msg[fixed_message_ln+PNG_MAX_ERROR_TEXT];
-   png_memcpy(msg, fixed_message, fixed_message_ln);
-   iin = 0;
-   if (name != NULL) while (iin < (PNG_MAX_ERROR_TEXT-1) && name[iin] != 0)
-   {
-      msg[fixed_message_ln + iin] = name[iin];
-      ++iin;
-   }
-   msg[fixed_message_ln + iin] = 0;
-   png_error(png_ptr, msg);
-}
-#endif
-#endif
-
-#ifdef PNG_SETJMP_SUPPORTED
-/* This API only exists if ANSI-C style error handling is used,
- * otherwise it is necessary for png_default_error to be overridden.
- */
-jmp_buf* PNGAPI
-png_set_longjmp_fn(png_structrp png_ptr, png_longjmp_ptr longjmp_fn,
-    size_t jmp_buf_size)
-{
-   /* From libpng 1.6.0 the app gets one chance to set a 'jmpbuf_size' value
-    * and it must not change after that.  Libpng doesn't care how big the
-    * buffer is, just that it doesn't change.
-    *
-    * If the buffer size is no *larger* than the size of jmp_buf when libpng is
-    * compiled a built in jmp_buf is returned; this preserves the pre-1.6.0
-    * semantics that this call will not fail.  If the size is larger, however,
-    * the buffer is allocated and this may fail, causing the function to return
-    * NULL.
-    */
-   if (png_ptr == NULL)
-      return NULL;
-
-   if (png_ptr->jmp_buf_ptr == NULL)
-   {
-      png_ptr->jmp_buf_size = 0; /* not allocated */
-
-      if (jmp_buf_size <= sizeof png_ptr->jmp_buf_local)
-         png_ptr->jmp_buf_ptr = &png_ptr->jmp_buf_local;
-
-      else
-      {
-         png_ptr->jmp_buf_ptr = png_voidcast(jmp_buf *,
-            png_malloc_warn(png_ptr, jmp_buf_size));
-
-         if (png_ptr->jmp_buf_ptr == NULL)
-            return NULL; /* new NULL return on OOM */
-
-         png_ptr->jmp_buf_size = jmp_buf_size;
-      }
-   }
-
-   else /* Already allocated: check the size */
-   {
-      size_t size = png_ptr->jmp_buf_size;
-
-      if (size == 0)
-      {
-         size = sizeof png_ptr->jmp_buf_local;
-         if (png_ptr->jmp_buf_ptr != &png_ptr->jmp_buf_local)
-         {
-            /* This is an internal error in libpng: somehow we have been left
-             * with a stack allocated jmp_buf when the application regained
-             * control.  It's always possible to fix this up, but for the moment
-             * this is a png_error because that makes it easy to detect.
-             */
-            png_error(png_ptr, "Libpng jmp_buf still allocated");
-            /* png_ptr->jmp_buf_ptr = &png_ptr->jmp_buf_local; */
-         }
-      }
-
-      if (size != jmp_buf_size)
-      {
-         png_warning(png_ptr, "Application jmp_buf size changed");
-         return NULL; /* caller will probably crash: no choice here */
-      }
-   }
-
-   /* Finally fill in the function, now we have a satisfactory buffer. It is
-    * valid to change the function on every call.
-    */
-   png_ptr->longjmp_fn = longjmp_fn;
-   return png_ptr->jmp_buf_ptr;
-}
-
-void /* PRIVATE */
-png_free_jmpbuf(png_structrp png_ptr)
-{
-   if (png_ptr != NULL)
-   {
-      jmp_buf *jb = png_ptr->jmp_buf_ptr;
-
-      /* A size of 0 is used to indicate a local, stack, allocation of the
-       * pointer; used here and in png.c
-       */
-      if (jb != NULL && png_ptr->jmp_buf_size > 0)
-      {
-
-         /* This stuff is so that a failure to free the error control structure
-          * does not leave libpng in a state with no valid error handling: the
-          * free always succeeds, if there is an error it gets ignored.
-          */
-         if (jb != &png_ptr->jmp_buf_local)
-         {
-            /* Make an internal, libpng, jmp_buf to return here */
-            jmp_buf free_jmp_buf;
-
-            if (!setjmp(free_jmp_buf))
-            {
-               png_ptr->jmp_buf_ptr = &free_jmp_buf; /* come back here */
-               png_ptr->jmp_buf_size = 0; /* stack allocation */
-               png_ptr->longjmp_fn = longjmp;
-               png_free(png_ptr, jb); /* Return to setjmp on error */
-            }
-         }
-      }
-
-      /* *Always* cancel everything out: */
-      png_ptr->jmp_buf_size = 0;
-      png_ptr->jmp_buf_ptr = NULL;
-      png_ptr->longjmp_fn = 0;
-   }
-}
-#endif
-
 /* This is the default error handling function.  Note that replacements for
  * this function MUST NOT RETURN, or the program will likely crash.  This
  * function is used by default, or if the program supplies NULL for the
  * error function pointer in png_set_error_fn().
  */
-static PNG_FUNCTION(void /* PRIVATE */,
-png_default_error,(png_const_structrp png_ptr, png_const_charp error_message),
-   PNG_NORETURN)
+static void /* PRIVATE */
+png_default_error(png_structp png_ptr, png_const_charp error_message)
 {
 #ifdef PNG_CONSOLE_IO_SUPPORTED
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
-   /* Check on NULL only added in 1.5.4 */
-   if (error_message != NULL && *error_message == PNG_LITERAL_SHARP)
+   if (*error_message == PNG_LITERAL_SHARP)
    {
-      /* Strip "#nnnn " from beginning of error message. */
-      int offset;
-      char error_number[16];
-      for (offset = 0; offset<15; offset++)
-      {
+     /* Strip "#nnnn " from beginning of error message. */
+     int offset;
+     char error_number[16];
+     for (offset = 0; offset<15; offset++)
+     {
          error_number[offset] = error_message[offset + 1];
          if (error_message[offset] == ' ')
-            break;
-      }
-
-      if ((offset > 1) && (offset < 15))
-      {
-         error_number[offset - 1] = '\0';
-         fprintf(stderr, "libpng error no. %s: %s",
-             error_number, error_message + offset + 1);
-         fprintf(stderr, PNG_STRING_NEWLINE);
-      }
-
-      else
-      {
-         fprintf(stderr, "libpng error: %s, offset=%d",
-             error_message, offset);
-         fprintf(stderr, PNG_STRING_NEWLINE);
-      }
+             break;
+     }
+     if ((offset > 1) && (offset < 15))
+     {
+       error_number[offset - 1] = '\0';
+       fprintf(stderr, "libpng error no. %s: %s",
+          error_number, error_message + offset + 1);
+       fprintf(stderr, "\n");
+     }
+     else
+     {
+       fprintf(stderr, "libpng error: %s, offset=%d",
+          error_message, offset);
+       fprintf(stderr, "\n");
+     }
    }
    else
 #endif
    {
-      fprintf(stderr, "libpng error: %s", error_message ? error_message :
-         "undefined");
-      fprintf(stderr, PNG_STRING_NEWLINE);
+      fprintf(stderr, "libpng error: %s", error_message);
+      fprintf(stderr, "\n");
    }
-#else
-   PNG_UNUSED(error_message) /* Make compiler happy */
 #endif
-   png_longjmp(png_ptr, 1);
-}
 
-PNG_FUNCTION(void,PNGAPI
-png_longjmp,(png_const_structrp png_ptr, int val),PNG_NORETURN)
-{
 #ifdef PNG_SETJMP_SUPPORTED
-   if (png_ptr && png_ptr->longjmp_fn && png_ptr->jmp_buf_ptr)
-      png_ptr->longjmp_fn(*png_ptr->jmp_buf_ptr, val);
+   if (png_ptr)
+   {
+#  ifdef USE_FAR_KEYWORD
+   {
+      jmp_buf jmpbuf;
+      png_memcpy(jmpbuf, png_ptr->jmpbuf, png_sizeof(jmp_buf));
+     longjmp(jmpbuf,1);
+   }
+#  else
+   longjmp(png_ptr->jmpbuf, 1);
+#  endif
+   }
 #endif
-
    /* Here if not setjmp support or if png_ptr is null. */
    PNG_ABORT();
+#ifndef PNG_CONSOLE_IO_SUPPORTED
+   error_message = error_message; /* Make compiler happy */
+#endif
 }
 
 #ifdef PNG_WARNINGS_SUPPORTED
@@ -677,69 +301,61 @@ png_longjmp,(png_const_structrp png_ptr, int val),PNG_NORETURN)
  * not used, but it is passed in case it may be useful.
  */
 static void /* PRIVATE */
-png_default_warning(png_const_structrp png_ptr, png_const_charp warning_message)
+png_default_warning(png_structp png_ptr, png_const_charp warning_message)
 {
 #ifdef PNG_CONSOLE_IO_SUPPORTED
 #  ifdef PNG_ERROR_NUMBERS_SUPPORTED
    if (*warning_message == PNG_LITERAL_SHARP)
    {
-      int offset;
-      char warning_number[16];
-      for (offset = 0; offset < 15; offset++)
-      {
-         warning_number[offset] = warning_message[offset + 1];
-         if (warning_message[offset] == ' ')
+     int offset;
+     char warning_number[16];
+     for (offset = 0; offset < 15; offset++)
+     {
+        warning_number[offset] = warning_message[offset + 1];
+        if (warning_message[offset] == ' ')
             break;
-      }
-
-      if ((offset > 1) && (offset < 15))
-      {
-         warning_number[offset + 1] = '\0';
-         fprintf(stderr, "libpng warning no. %s: %s",
-             warning_number, warning_message + offset);
-         fprintf(stderr, PNG_STRING_NEWLINE);
-      }
-
-      else
-      {
-         fprintf(stderr, "libpng warning: %s",
-             warning_message);
-         fprintf(stderr, PNG_STRING_NEWLINE);
-      }
+     }
+     if ((offset > 1) && (offset < 15))
+     {
+       warning_number[offset + 1] = '\0';
+       fprintf(stderr, "libpng warning no. %s: %s",
+          warning_number, warning_message + offset);
+       fprintf(stderr, "\n");
+     }
+     else
+     {
+       fprintf(stderr, "libpng warning: %s",
+          warning_message);
+       fprintf(stderr, "\n");
+     }
    }
    else
 #  endif
-
    {
-      fprintf(stderr, "libpng warning: %s", warning_message);
-      fprintf(stderr, PNG_STRING_NEWLINE);
+     fprintf(stderr, "libpng warning: %s", warning_message);
+       fprintf(stderr, "\n");
    }
 #else
-   PNG_UNUSED(warning_message) /* Make compiler happy */
+   warning_message = warning_message; /* Make compiler happy */
 #endif
-   PNG_UNUSED(png_ptr) /* Make compiler happy */
+   png_ptr = png_ptr; /* Make compiler happy */
 }
 #endif /* PNG_WARNINGS_SUPPORTED */
 
 /* This function is called when the application wants to use another method
  * of handling errors and warnings.  Note that the error function MUST NOT
  * return to the calling routine or serious problems will occur.  The return
- * method used in the default routine calls longjmp(png_ptr->jmp_buf_ptr, 1)
+ * method used in the default routine calls longjmp(png_ptr->jmpbuf, 1)
  */
 void PNGAPI
-png_set_error_fn(png_structrp png_ptr, png_voidp error_ptr,
-    png_error_ptr error_fn, png_error_ptr warning_fn)
+png_set_error_fn(png_structp png_ptr, png_voidp error_ptr,
+   png_error_ptr error_fn, png_error_ptr warning_fn)
 {
    if (png_ptr == NULL)
       return;
-
    png_ptr->error_ptr = error_ptr;
    png_ptr->error_fn = error_fn;
-#ifdef PNG_WARNINGS_SUPPORTED
    png_ptr->warning_fn = warning_fn;
-#else
-   PNG_UNUSED(warning_fn)
-#endif
 }
 
 
@@ -748,110 +364,23 @@ png_set_error_fn(png_structrp png_ptr, png_voidp error_ptr,
  * pointer before png_write_destroy and png_read_destroy are called.
  */
 png_voidp PNGAPI
-png_get_error_ptr(png_const_structrp png_ptr)
+png_get_error_ptr(png_structp png_ptr)
 {
    if (png_ptr == NULL)
       return NULL;
-
    return ((png_voidp)png_ptr->error_ptr);
 }
 
 
 #ifdef PNG_ERROR_NUMBERS_SUPPORTED
 void PNGAPI
-png_set_strip_error_numbers(png_structrp png_ptr, png_uint_32 strip_mode)
+png_set_strip_error_numbers(png_structp png_ptr, png_uint_32 strip_mode)
 {
    if (png_ptr != NULL)
    {
-      png_ptr->flags &=
-         ((~(PNG_FLAG_STRIP_ERROR_NUMBERS |
-         PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
+     png_ptr->flags &=
+       ((~(PNG_FLAG_STRIP_ERROR_NUMBERS|PNG_FLAG_STRIP_ERROR_TEXT))&strip_mode);
    }
 }
 #endif
-
-#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\
-   defined PNG_SIMPLIFIED_WRITE_SUPPORTED
-   /* Currently the above both depend on SETJMP_SUPPORTED, however it would be
-    * possible to implement without setjmp support just so long as there is some
-    * way to handle the error return here:
-    */
-PNG_FUNCTION(void /* PRIVATE */,
-png_safe_error,(png_structp png_nonconst_ptr, png_const_charp error_message),
-   PNG_NORETURN)
-{
-   const png_const_structrp png_ptr = png_nonconst_ptr;
-   png_imagep image = png_voidcast(png_imagep, png_ptr->error_ptr);
-
-   /* An error is always logged here, overwriting anything (typically a warning)
-    * that is already there:
-    */
-   if (image != NULL)
-   {
-      png_safecat(image->message, sizeof image->message, 0, error_message);
-      image->warning_or_error = 1;
-
-      /* Retrieve the jmp_buf from within the png_control, making this work for
-       * C++ compilation too is pretty tricky: C++ wants a pointer to the first
-       * element of a jmp_buf, but C doesn't tell us the type of that.
-       */
-      if (image->opaque != NULL && image->opaque->error_buf != NULL)
-         longjmp(png_control_jmp_buf(image->opaque), 1);
-
-      /* Missing longjmp buffer, the following is to help debugging: */
-      {
-         size_t pos = png_safecat(image->message, sizeof image->message, 0,
-            "bad longjmp: ");
-         png_safecat(image->message, sizeof image->message, pos, error_message);
-      }
-   }
-
-   /* Here on an internal programming error. */
-   abort();
-}
-
-#ifdef PNG_WARNINGS_SUPPORTED
-void /* PRIVATE */
-png_safe_warning(png_structp png_nonconst_ptr, png_const_charp warning_message)
-{
-   const png_const_structrp png_ptr = png_nonconst_ptr;
-   png_imagep image = png_voidcast(png_imagep, png_ptr->error_ptr);
-
-   /* A warning is only logged if there is no prior warning or error. */
-   if (image->warning_or_error == 0)
-   {
-      png_safecat(image->message, sizeof image->message, 0, warning_message);
-      image->warning_or_error = 2;
-   }
-}
-#endif
-
-int /* PRIVATE */
-png_safe_execute(png_imagep imageIn, int (*function)(png_voidp), png_voidp arg)
-{
-   volatile png_imagep image = imageIn;
-   volatile int result;
-   volatile png_voidp saved_error_buf;
-   jmp_buf safe_jmpbuf;
-
-   /* Safely execute function(arg) with png_error returning to this function. */
-   saved_error_buf = image->opaque->error_buf;
-   result = setjmp(safe_jmpbuf) == 0;
-
-   if (result)
-   {
-
-      image->opaque->error_buf = safe_jmpbuf;
-      result = function(arg);
-   }
-
-   image->opaque->error_buf = saved_error_buf;
-
-   /* And do the cleanup prior to any failure return. */
-   if (!result)
-      png_image_free(image);
-
-   return result;
-}
-#endif /* SIMPLIFIED READ/WRITE */
 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

pnggccrd.c

@@ -0,0 +1,103 @@
+/* pnggccrd.c was removed from libpng-1.2.20. */
+
+/* This code snippet is for use by configure's compilation test. */
+
+#if (!defined _MSC_VER) && \
+    defined(PNG_ASSEMBLER_CODE_SUPPORTED) && \
+    defined(PNG_MMX_CODE_SUPPORTED)
+
+int PNGAPI png_dummy_mmx_support(void);
+
+static int _mmx_supported = 2; // 0: no MMX; 1: MMX supported; 2: not tested
+
+int PNGAPI
+png_dummy_mmx_support(void) __attribute__((noinline));
+
+int PNGAPI
+png_dummy_mmx_support(void)
+{
+   int result;
+#ifdef PNG_MMX_CODE_SUPPORTED  // superfluous, but what the heck
+    __asm__ __volatile__ (
+#ifdef __x86_64__
+        "pushq %%rbx          \n\t"  // rbx gets clobbered by CPUID instruction
+        "pushq %%rcx          \n\t"  // so does rcx...
+        "pushq %%rdx          \n\t"  // ...and rdx (but rcx & rdx safe on Linux)
+        "pushfq               \n\t"  // save Eflag to stack
+        "popq %%rax           \n\t"  // get Eflag from stack into rax
+        "movq %%rax, %%rcx    \n\t"  // make another copy of Eflag in rcx
+        "xorl $0x200000, %%eax \n\t" // toggle ID bit in Eflag (i.e., bit 21)
+        "pushq %%rax          \n\t"  // save modified Eflag back to stack
+        "popfq                \n\t"  // restore modified value to Eflag reg
+        "pushfq               \n\t"  // save Eflag to stack
+        "popq %%rax           \n\t"  // get Eflag from stack
+        "pushq %%rcx          \n\t"  // save original Eflag to stack
+        "popfq                \n\t"  // restore original Eflag
+#else
+        "pushl %%ebx          \n\t"  // ebx gets clobbered by CPUID instruction
+        "pushl %%ecx          \n\t"  // so does ecx...
+        "pushl %%edx          \n\t"  // ...and edx (but ecx & edx safe on Linux)
+        "pushfl               \n\t"  // save Eflag to stack
+        "popl %%eax           \n\t"  // get Eflag from stack into eax
+        "movl %%eax, %%ecx    \n\t"  // make another copy of Eflag in ecx
+        "xorl $0x200000, %%eax \n\t" // toggle ID bit in Eflag (i.e., bit 21)
+        "pushl %%eax          \n\t"  // save modified Eflag back to stack
+        "popfl                \n\t"  // restore modified value to Eflag reg
+        "pushfl               \n\t"  // save Eflag to stack
+        "popl %%eax           \n\t"  // get Eflag from stack
+        "pushl %%ecx          \n\t"  // save original Eflag to stack
+        "popfl                \n\t"  // restore original Eflag
+#endif
+        "xorl %%ecx, %%eax    \n\t"  // compare new Eflag with original Eflag
+        "jz 0f                \n\t"  // if same, CPUID instr. is not supported
+
+        "xorl %%eax, %%eax    \n\t"  // set eax to zero
+//      ".byte  0x0f, 0xa2    \n\t"  // CPUID instruction (two-byte opcode)
+        "cpuid                \n\t"  // get the CPU identification info
+        "cmpl $1, %%eax       \n\t"  // make sure eax return non-zero value
+        "jl 0f                \n\t"  // if eax is zero, MMX is not supported
+
+        "xorl %%eax, %%eax    \n\t"  // set eax to zero and...
+        "incl %%eax           \n\t"  // ...increment eax to 1.  This pair is
+                                     // faster than the instruction "mov eax, 1"
+        "cpuid                \n\t"  // get the CPU identification info again
+        "andl $0x800000, %%edx \n\t" // mask out all bits but MMX bit (23)
+        "cmpl $0, %%edx       \n\t"  // 0 = MMX not supported
+        "jz 0f                \n\t"  // non-zero = yes, MMX IS supported
+
+        "movl $1, %%eax       \n\t"  // set return value to 1
+        "jmp  1f              \n\t"  // DONE:  have MMX support
+
+    "0:                       \n\t"  // .NOT_SUPPORTED: target label for jump instructions
+        "movl $0, %%eax       \n\t"  // set return value to 0
+    "1:                       \n\t"  // .RETURN: target label for jump instructions
+#ifdef __x86_64__
+        "popq %%rdx           \n\t"  // restore rdx
+        "popq %%rcx           \n\t"  // restore rcx
+        "popq %%rbx           \n\t"  // restore rbx
+#else
+        "popl %%edx           \n\t"  // restore edx
+        "popl %%ecx           \n\t"  // restore ecx
+        "popl %%ebx           \n\t"  // restore ebx
+#endif
+
+//      "ret                  \n\t"  // DONE:  no MMX support
+                                     // (fall through to standard C "ret")
+
+        : "=a" (result)              // output list
+
+        :                            // any variables used on input (none)
+
+                                     // no clobber list
+//      , "%ebx", "%ecx", "%edx"     // GRR:  we handle these manually
+//      , "memory"   // if write to a variable gcc thought was in a reg
+//      , "cc"       // "condition codes" (flag bits)
+    );
+    _mmx_supported = result;
+#else
+    _mmx_supported = 0;
+#endif /* PNG_MMX_CODE_SUPPORTED */
+
+    return _mmx_supported;
+}
+#endif

pnginfo.h

@@ -1,269 +0,0 @@
-
-/* pnginfo.h - header file for PNG reference library
- *
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
- * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
- * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
- *
- * Last changed in libpng 1.5.0 [January 6, 2011]
- *
- * This code is released under the libpng license.
- * For conditions of distribution and use, see the disclaimer
- * and license in png.h
- */
-
- /* png_info is a structure that holds the information in a PNG file so
- * that the application can find out the characteristics of the image.
- * If you are reading the file, this structure will tell you what is
- * in the PNG file.  If you are writing the file, fill in the information
- * you want to put into the PNG file, using png_set_*() functions, then
- * call png_write_info().
- *
- * The names chosen should be very close to the PNG specification, so
- * consult that document for information about the meaning of each field.
- *
- * With libpng < 0.95, it was only possible to directly set and read the
- * the values in the png_info_struct, which meant that the contents and
- * order of the values had to remain fixed.  With libpng 0.95 and later,
- * however, there are now functions that abstract the contents of
- * png_info_struct from the application, so this makes it easier to use
- * libpng with dynamic libraries, and even makes it possible to use
- * libraries that don't have all of the libpng ancillary chunk-handing
- * functionality.  In libpng-1.5.0 this was moved into a separate private
- * file that is not visible to applications.
- *
- * The following members may have allocated storage attached that should be
- * cleaned up before the structure is discarded: palette, trans, text,
- * pcal_purpose, pcal_units, pcal_params, hist, iccp_name, iccp_profile,
- * splt_palettes, scal_unit, row_pointers, and unknowns.   By default, these
- * are automatically freed when the info structure is deallocated, if they were
- * allocated internally by libpng.  This behavior can be changed by means
- * of the png_data_freer() function.
- *
- * More allocation details: all the chunk-reading functions that
- * change these members go through the corresponding png_set_*
- * functions.  A function to clear these members is available: see
- * png_free_data().  The png_set_* functions do not depend on being
- * able to point info structure members to any of the storage they are
- * passed (they make their own copies), EXCEPT that the png_set_text
- * functions use the same storage passed to them in the text_ptr or
- * itxt_ptr structure argument, and the png_set_rows and png_set_unknowns
- * functions do not make their own copies.
- */
-#ifndef PNGINFO_H
-#define PNGINFO_H
-
-struct png_info_def
-{
-   /* the following are necessary for every PNG file */
-   png_uint_32 width;  /* width of image in pixels (from IHDR) */
-   png_uint_32 height; /* height of image in pixels (from IHDR) */
-   png_uint_32 valid;  /* valid chunk data (see PNG_INFO_ below) */
-   png_size_t rowbytes; /* bytes needed to hold an untransformed row */
-   png_colorp palette;      /* array of color values (valid & PNG_INFO_PLTE) */
-   png_uint_16 num_palette; /* number of color entries in "palette" (PLTE) */
-   png_uint_16 num_trans;   /* number of transparent palette color (tRNS) */
-   png_byte bit_depth;      /* 1, 2, 4, 8, or 16 bits/channel (from IHDR) */
-   png_byte color_type;     /* see PNG_COLOR_TYPE_ below (from IHDR) */
-   /* The following three should have been named *_method not *_type */
-   png_byte compression_type; /* must be PNG_COMPRESSION_TYPE_BASE (IHDR) */
-   png_byte filter_type;    /* must be PNG_FILTER_TYPE_BASE (from IHDR) */
-   png_byte interlace_type; /* One of PNG_INTERLACE_NONE, PNG_INTERLACE_ADAM7 */
-
-   /* The following is informational only on read, and not used on writes. */
-   png_byte channels;       /* number of data channels per pixel (1, 2, 3, 4) */
-   png_byte pixel_depth;    /* number of bits per pixel */
-   png_byte spare_byte;     /* to align the data, and for future use */
-   png_byte signature[8];   /* magic bytes read by libpng from start of file */
-
-   /* The rest of the data is optional.  If you are reading, check the
-    * valid field to see if the information in these are valid.  If you
-    * are writing, set the valid field to those chunks you want written,
-    * and initialize the appropriate fields below.
-    */
-
-#if defined(PNG_gAMA_SUPPORTED)
-   /* The gAMA chunk describes the gamma characteristics of the system
-    * on which the image was created, normally in the range [1.0, 2.5].
-    * Data is valid if (valid & PNG_INFO_gAMA) is non-zero.
-    */
-   png_fixed_point gamma;
-#endif
-
-#ifdef PNG_sRGB_SUPPORTED
-    /* GR-P, 0.96a */
-    /* Data valid if (valid & PNG_INFO_sRGB) non-zero. */
-   png_byte srgb_intent; /* sRGB rendering intent [0, 1, 2, or 3] */
-#endif
-
-#ifdef PNG_TEXT_SUPPORTED
-   /* The tEXt, and zTXt chunks contain human-readable textual data in
-    * uncompressed, compressed, and optionally compressed forms, respectively.
-    * The data in "text" is an array of pointers to uncompressed,
-    * null-terminated C strings. Each chunk has a keyword that describes the
-    * textual data contained in that chunk.  Keywords are not required to be
-    * unique, and the text string may be empty.  Any number of text chunks may
-    * be in an image.
-    */
-   int num_text; /* number of comments read or comments to write */
-   int max_text; /* current size of text array */
-   png_textp text; /* array of comments read or comments to write */
-#endif /* PNG_TEXT_SUPPORTED */
-
-#ifdef PNG_tIME_SUPPORTED
-   /* The tIME chunk holds the last time the displayed image data was
-    * modified.  See the png_time struct for the contents of this struct.
-    */
-   png_time mod_time;
-#endif
-
-#ifdef PNG_sBIT_SUPPORTED
-   /* The sBIT chunk specifies the number of significant high-order bits
-    * in the pixel data.  Values are in the range [1, bit_depth], and are
-    * only specified for the channels in the pixel data.  The contents of
-    * the low-order bits is not specified.  Data is valid if
-    * (valid & PNG_INFO_sBIT) is non-zero.
-    */
-   png_color_8 sig_bit; /* significant bits in color channels */
-#endif
-
-#if defined(PNG_tRNS_SUPPORTED) || defined(PNG_READ_EXPAND_SUPPORTED) || \
-defined(PNG_READ_BACKGROUND_SUPPORTED)
-   /* The tRNS chunk supplies transparency data for paletted images and
-    * other image types that don't need a full alpha channel.  There are
-    * "num_trans" transparency values for a paletted image, stored in the
-    * same order as the palette colors, starting from index 0.  Values
-    * for the data are in the range [0, 255], ranging from fully transparent
-    * to fully opaque, respectively.  For non-paletted images, there is a
-    * single color specified that should be treated as fully transparent.
-    * Data is valid if (valid & PNG_INFO_tRNS) is non-zero.
-    */
-   png_bytep trans_alpha;    /* alpha values for paletted image */
-   png_color_16 trans_color; /* transparent color for non-palette image */
-#endif
-
-#if defined(PNG_bKGD_SUPPORTED) || defined(PNG_READ_BACKGROUND_SUPPORTED)
-   /* The bKGD chunk gives the suggested image background color if the
-    * display program does not have its own background color and the image
-    * is needs to composited onto a background before display.  The colors
-    * in "background" are normally in the same color space/depth as the
-    * pixel data.  Data is valid if (valid & PNG_INFO_bKGD) is non-zero.
-    */
-   png_color_16 background;
-#endif
-
-#ifdef PNG_oFFs_SUPPORTED
-   /* The oFFs chunk gives the offset in "offset_unit_type" units rightwards
-    * and downwards from the top-left corner of the display, page, or other
-    * application-specific co-ordinate space.  See the PNG_OFFSET_ defines
-    * below for the unit types.  Valid if (valid & PNG_INFO_oFFs) non-zero.
-    */
-   png_int_32 x_offset; /* x offset on page */
-   png_int_32 y_offset; /* y offset on page */
-   png_byte offset_unit_type; /* offset units type */
-#endif
-
-#ifdef PNG_pHYs_SUPPORTED
-   /* The pHYs chunk gives the physical pixel density of the image for
-    * display or printing in "phys_unit_type" units (see PNG_RESOLUTION_
-    * defines below).  Data is valid if (valid & PNG_INFO_pHYs) is non-zero.
-    */
-   png_uint_32 x_pixels_per_unit; /* horizontal pixel density */
-   png_uint_32 y_pixels_per_unit; /* vertical pixel density */
-   png_byte phys_unit_type; /* resolution type (see PNG_RESOLUTION_ below) */
-#endif
-
-#ifdef PNG_hIST_SUPPORTED
-   /* The hIST chunk contains the relative frequency or importance of the
-    * various palette entries, so that a viewer can intelligently select a
-    * reduced-color palette, if required.  Data is an array of "num_palette"
-    * values in the range [0,65535]. Data valid if (valid & PNG_INFO_hIST)
-    * is non-zero.
-    */
-   png_uint_16p hist;
-#endif
-
-#ifdef PNG_cHRM_SUPPORTED
-   /* The cHRM chunk describes the CIE color characteristics of the monitor
-    * on which the PNG was created.  This data allows the viewer to do gamut
-    * mapping of the input image to ensure that the viewer sees the same
-    * colors in the image as the creator.  Values are in the range
-    * [0.0, 0.8].  Data valid if (valid & PNG_INFO_cHRM) non-zero.
-    */
-   png_fixed_point x_white;
-   png_fixed_point y_white;
-   png_fixed_point x_red;
-   png_fixed_point y_red;
-   png_fixed_point x_green;
-   png_fixed_point y_green;
-   png_fixed_point x_blue;
-   png_fixed_point y_blue;
-#endif
-
-#ifdef PNG_pCAL_SUPPORTED
-   /* The pCAL chunk describes a transformation between the stored pixel
-    * values and original physical data values used to create the image.
-    * The integer range [0, 2^bit_depth - 1] maps to the floating-point
-    * range given by [pcal_X0, pcal_X1], and are further transformed by a
-    * (possibly non-linear) transformation function given by "pcal_type"
-    * and "pcal_params" into "pcal_units".  Please see the PNG_EQUATION_
-    * defines below, and the PNG-Group's PNG extensions document for a
-    * complete description of the transformations and how they should be
-    * implemented, and for a description of the ASCII parameter strings.
-    * Data values are valid if (valid & PNG_INFO_pCAL) non-zero.
-    */
-   png_charp pcal_purpose;  /* pCAL chunk description string */
-   png_int_32 pcal_X0;      /* minimum value */
-   png_int_32 pcal_X1;      /* maximum value */
-   png_charp pcal_units;    /* Latin-1 string giving physical units */
-   png_charpp pcal_params;  /* ASCII strings containing parameter values */
-   png_byte pcal_type;      /* equation type (see PNG_EQUATION_ below) */
-   png_byte pcal_nparams;   /* number of parameters given in pcal_params */
-#endif
-
-/* New members added in libpng-1.0.6 */
-   png_uint_32 free_me;     /* flags items libpng is responsible for freeing */
-
-#if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) || \
- defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED)
-   /* Storage for unknown chunks that the library doesn't recognize. */
-   png_unknown_chunkp unknown_chunks;
-   int unknown_chunks_num;
-#endif
-
-#ifdef PNG_iCCP_SUPPORTED
-   /* iCCP chunk data. */
-   png_charp iccp_name;     /* profile name */
-   png_bytep iccp_profile;  /* International Color Consortium profile data */
-   png_uint_32 iccp_proflen;  /* ICC profile data length */
-   png_byte iccp_compression; /* Always zero */
-#endif
-
-#ifdef PNG_sPLT_SUPPORTED
-   /* Data on sPLT chunks (there may be more than one). */
-   png_sPLT_tp splt_palettes;
-   png_uint_32 splt_palettes_num;
-#endif
-
-#ifdef PNG_sCAL_SUPPORTED
-   /* The sCAL chunk describes the actual physical dimensions of the
-    * subject matter of the graphic.  The chunk contains a unit specification
-    * a byte value, and two ASCII strings representing floating-point
-    * values.  The values are width and height corresponsing to one pixel
-    * in the image.  Data values are valid if (valid & PNG_INFO_sCAL) is
-    * non-zero.
-    */
-   png_byte scal_unit;         /* unit of physical scale */
-   png_charp scal_s_width;     /* string containing height */
-   png_charp scal_s_height;    /* string containing width */
-#endif
-
-#ifdef PNG_INFO_IMAGE_SUPPORTED
-   /* Memory has been allocated if (valid & PNG_ALLOCATED_INFO_ROWS)
-      non-zero */
-   /* Data valid if (valid & PNG_INFO_IDAT) non-zero */
-   png_bytepp row_pointers;        /* the image bits */
-#endif
-
-};
-#endif /* PNGINFO_H */