[libpng16] Imported from libpng-1.6.1beta02.tar

Folded some long lines.

ANNOUNCE

@@ -1,5 +1,5 @@
 
-Libpng 1.6.0beta33 - December 10, 2012
+Libpng 1.6.1beta02 - February 19, 2013
 
 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.
@@ -9,555 +9,45 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.6.0beta33.tar.xz (LZMA-compressed, recommended)
-   1.6.0beta33.tar.gz
-   1.6.0beta33.tar.bz2
+   1.6.1beta02.tar.xz (LZMA-compressed, recommended)
+   1.6.1beta02.tar.gz
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp160b33.7z  (LZMA-compressed, recommended)
-   lp160b33.zip
+   lp161b02.7z  (LZMA-compressed, recommended)
+   lp161b02.zip
 
 Other information:
 
-   1.6.0beta33-README.txt
-   1.6.0beta33-LICENSE.txt
+   1.6.1beta02-README.txt
+   1.6.1beta02-LICENSE.txt
 
-Changes since the last public release (1.5.7):
+Changes since the last public release (1.6.0):
 
-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 1.6.1beta01 [February 16, 2013]
+  Made symbol prefixing work with the ARM neon optimizations. Also allow
+    pngpriv.h to be included for preprocessor definitions only, so it can
+    be used in non-C/C++ files. Back ported from libpng 1.7.
+  Made sRGB check numbers consistent.
+  Ported libpng 1.5 options.awk/dfn file handling to 1.6, fixed one bug.
+  Removed cc -E workround, corrected png_get_palette_max API Tested on
+    SUN OS cc 5.9, which demonstrates the tokenization problem previously
+    avoided by using /lib/cpp.  Since all .dfn output is now protected in
+    double quotes unless it is to be macro substituted the fix should
+    work everywhere.
+  Enabled parallel tests - back ported from libpng-1.7.
+  scripts/pnglibconf.dfa formatting improvements back ported from libpng17.
+  Fixed a race condition in the creation of the build 'scripts' directory
+    while building with a parallel make.
+  Use approved/supported Android method to check for NEON, use Linux/POSIX
+    1003.1 API to check /proc/self/auxv avoiding buffer allocation and other
+    library calls (ported from libpng15).
 
-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 1.6.0beta03 [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.
-  Added png_convert_to_rfc1123_buffer() and deprecated png_convert_to_rfc1123()
-    to avoid including a spurious buffer in the png_struct.
-
-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 1.6.0beta05 [January 15, 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
-    (CVE-2011-3464, bug introduced in libpng-1.5.3beta05).
-
-Version 1.6.0beta06 [January 24, 2012]
-  Added palette support to the simplified APIs. This commit
-    changes some of the macro definitions in png.h, app code
-    may need corresponding changes.
-  Increased the formatted warning buffer to 192 bytes.
-  Added color-map support to simplified API. This is an initial version for
-    review; the documentation has not yet been updated.
-  Fixed Min/GW uninstall to remove libpng.dll.a
-
-Version 1.6.0beta07 [January 28, 2012]
-  Eliminated Intel icc/icl compiler warnings. The Intel (GCC derived)
-    compiler issues slightly different warnings from those issued by the
-    current vesions of GCC. This eliminates those warnings by
-    adding/removing casts and small code rewrites.
-  Updated configure.ac from autoupdate: added --enable-werror option.
-    Also some layout regularization and removal of introduced tab characters
-    (replaced with 3-character indentation).  Obsolete macros identified by
-    autoupdate have been removed; the replacements are all in 2.59 so
-    the pre-req hasn't been changed.  --enable-werror checks for support
-    for -Werror (or the given argument) in the compiler.  This mimics the
-    gcc configure option by allowing -Werror to be turned on safely; without
-    the option the tests written in configure itself fail compilation because
-    they cause compiler warnings.
-  Rewrote autogen.sh to run autoreconf instead of running tools one-by-one.
-  Conditionalize the install rules for MINGW and CYGWIN in CMakeLists.txt and
-    set CMAKE_LIBRARY_OUTPUT_DIRECTORY to "lib" on all platforms (C. Yapp).
-  Freeze libtool files in the 'scripts' directory. This version of autogen.sh
-    attempts to dissuade people from running it when it is not, or should not,
-    be necessary.  In fact, autogen.sh does not work when run in a libpng
-    directory extracted from atar distribution anymore. You must run it in
-    a GIT clone instead.
-  Added two images to contrib/pngsuite (1-bit and 2-bit transparent grayscale),
-    and renamed three whose names were inconsistent with those in
-    pngsuite/README.txt.
-
-Version 1.6.0beta08 [February 1, 2012]
-  Fixed Image::colormap misalignment in pngstest.c
-  Check libtool/libtoolize version number (2.4.2) in configure.ac
-  Divide test-pngstest.sh into separate pngstest runs for basic and
-    transparent images.
-  Moved automake options to AM_INIT_AUTOMAKE in configure.ac
-  Added color-tests, silent-rules (Not yet implemented in Makefile.am) and
-    version checking to configure.ac
-  Improved pngstest speed by not doing redundant tests and add const to
-    the background parameter of png_image_finish_read. The --background
-    option is now done automagically only when required, so that commandline
-    option no longer exists.
-  Cleaned up pngpriv.h to consistently declare all functions and data.
-    Also eliminated PNG_CONST_DATA, which is apparently not needed but we
-    can't be sure until it is gone.
-  Added symbol prefixing that allows all the libpng external symbols
-    to be prefixed (suggested by Reuben Hawkins).
-  Updated "ftbb*.png" list in the owatcom and vstudio projects.
-  Fixed 'prefix' builds on clean systems. The generation of pngprefix.h
-    should not require itself.
-  Updated INSTALL to explain that autogen.sh must be run in a GIT clone,
-    not in a libpng directory extracted from a tar distribution.
-
-Version 1.6.0beta09 [February 1, 2012]
-  Reverted the prebuilt configure files to libpng-1.6.0beta05 condition.
-
-Version 1.6.0beta10 [February 3, 2012]
-  Added Z_SOLO for zlib-1.2.6+ and correct pngstest tests
-  Updated list of test images in CMakeLists.txt
-  Updated the prebuilt configure files to current condition.
-  Revised INSTALL information about autogen.sh; it works in tar distributions.
-
-Version 1.6.0beta11 [February 16, 2012]
-  Fix character count in pngstest command in projects/owatcom/pngstest.tgt
-  Revised test-pngstest.sh to report PASS/FAIL for each image.
-  Updated documentation about the simplified API.
-  Corrected estimate of error in libpng png_set_rgb_to_gray API.  The API is
-    extremely inaccurate for sRGB conversions because it uses an 8-bit
-    intermediate linear value and it does not use the sRGB transform, so it
-    suffers from the known instability in gamma transforms for values close
-    to 0 (see Poynton).  The net result is that the calculation has a maximum
-    error of 14.99/255; 0.5/255^(1/2.2).  pngstest now uses 15 for the
-    permitted 8-bit error. This may still not be enough because of arithmetic
-    error.
-  Removed some unused arrays (with #ifdef) from png_read_push_finish_row().
-  Fixed a memory overwrite bug in simplified read of RGB PNG with
-    non-linear gamma Also bugs in the error checking in pngread.c and changed
-    quite a lot of the checks in pngstest.c to be correct; either correctly
-    written or not over-optimistic.  The pngstest changes are insufficient to
-    allow all possible RGB transforms to be passed; pngstest cmppixel needs
-    to be rewritten to make it clearer which errors it allows and then changed
-    to permit known inaccuracies.
-  Removed tests for no-longer-used *_EMPTY_PLTE_SUPPORTED from pngstruct.h
-  Fixed fixed/float API export conditionals. 1) If FIXED_POINT or
-    FLOATING_POINT options were switched off, png.h ended up with lone ';'
-    characters.  This is not valid ANSI-C outside a function.  The ';'
-    characters have been moved inside the definition of PNG_FP_EXPORT and
-    PNG_FIXED_EXPORT. 2) If either option was switched off, the declaration
-    of the corresponding functions were completely omitted, even though some
-    of them are still used internally.  The result is still valid, but
-    produces warnings from gcc with some warning options (including -Wall). The
-    fix is to cause png.h to declare the functions with PNG_INTERNAL_FUNCTION
-    when png.h is included from pngpriv.h.
-  Check for invalid palette index while reading paletted PNG.  When one is
-    found, issue a warning and increase png_ptr->num_palette accordingly.
-    Apps are responsible for checking to see if that happened.
-
-Version 1.6.0beta12 [February 18, 2012]
-  Do not increase num_palette on invalid_index.
-  Relocated check for invalid palette index to pngrtran.c, after unpacking
-    the sub-8-bit pixels.
-  Fixed CVE-2011-3026 buffer overrun bug.  Deal more correctly with the test
-    on iCCP chunk length. Also removed spurious casts that may hide problems
-    on 16-bit systems.
-
-Version 1.6.0beta13 [February 24, 2012]
-  Eliminated redundant png_push_read_tEXt|zTXt|iTXt|unknown code from
-    pngpread.c and use the sequential png_handle_tEXt, etc., in pngrutil.c;
-    now that png_ptr->buffer is inaccessible to applications, the special
-    handling is no longer useful.
-  Added PNG_SAFE_LIMITS feature to pnglibconf.dfa, pngpriv.h, and new
-    pngusr.dfa to reset the user limits to safe ones if PNG_SAFE_LIMITS is
-    defined.  To enable, use "CPPFLAGS=-DPNG_SAFE_LIMITS_SUPPORTED=1" on the
-    configure command or put #define PNG_SAFE_LIMITS_SUPPORTED in
-    pnglibconf.h.prebuilt and pnglibconf.h.
-
-Version 1.6.0beta14 [February 27, 2012]
-  Added information about the new limits in the manual.
-  Updated Makefile.in
-
-Version 1.6.0beta15 [March 2, 2012]
-  Removed unused "current_text" members of png_struct and the png_free()
-    of png_ptr->current_text from pngread.c
-  Rewrote pngstest.c for substantial speed improvement.
-  Fixed transparent pixel and 16-bit rgb tests in pngstest and removed a
-    spurious check in pngwrite.c
-  Added PNG_IMAGE_FLAG_FAST for the benefit of applications that store
-    intermediate files, or intermediate in-memory data, while processing
-    image data with the simplified API.  The option makes the files larger
-    but faster to write and read.  pngstest now uses this by default; this
-    can be disabled with the --slow option.
-  Improved pngstest fine tuning of error numbers, new test file generator.
-    The generator generates images that test the full range of sample values,
-    allow the error numbers in pngstest to be tuned and checked.  makepng
-    also allows generation of images with extra chunks, although this is
-    still work-in-progress.
-  Added tests for invalid palette index while reading and writing (work in
-    progress, the latter isn't finished).
-  Fixed some bugs in ICC profile writing. The code should now accept
-    all potentially valid ICC profiles and reject obviously invalid ones.
-    It now uses png_error() to do so rather than casually writing a PNG
-    without the necessary color data.
-  Removed whitespace from the end of lines in all source files and scripts.
-
-Version 1.6.0beta16 [March 6, 2012]
-  Relocated palette-index checking function from pngrutil.c to pngtrans.c
-  Added palette-index checking while writing.
-  Changed png_inflate() and calling routines to avoid overflow problems.
-    This is an intermediate check-in that solves the immediate problems and
-    introduces one performance improvement (avoiding a copy via png_ptr->zbuf.)
-    Further changes will be made to make ICC profile handling more secure.
-  Fixed build warnings (MSVC, GCC, GCC v3). Cygwin GCC with default options
-    declares 'index' as a global, causing a warning if it is used as a local
-    variable.  GCC 64-bit warns about assigning a (size_t) (unsigned 64-bit)
-    to an (int) (signed 32-bit).  MSVC, however, warns about using the
-    unary '-' operator on an unsigned value (even though it is well defined
-    by ANSI-C to be ~x+1).  The padding calculation was changed to use a
-    different method.  Removed the tests on png_ptr->pass.
-  Added contrib/libtests/tarith.c to test internal arithmetic functions from
-    png.c. This is a libpng maintainer program used to validate changes to the
-    internal arithmetic functions.
-  Made read 'inflate' handling like write 'deflate' handling. The read
-    code now claims and releases png_ptr->zstream, like the write code.
-    The bug whereby the progressive reader failed to release the zstream
-    is now fixed, all initialization is delayed, and the code checks for
-    changed parameters on deflate rather than always calling
-    deflatedEnd/deflateInit.
-  Validate the zTXt strings in pngvalid.
-  Added code to validate the windowBits value passed to deflateInit2().
-    If the call to deflateInit2() is wrong a png_warning will be issued
-    (in fact this is harmless, but the PNG data produced may be sub-optimal).
-
-Version 1.6.0beta17 [March 10, 2012]
-  Fixed PNG_LIBPNG_BUILD_BASE_TYPE definition. 
-  Reject all iCCP chunks after the first, even if the first one is invalid.
-  Deflate/inflate was reworked to move common zlib calls into single
-    functions [rw]util.c.  A new shared keyword check routine was also added
-    and the 'zbuf' is no longer allocated on progressive read.  It is now
-    possible to call png_inflate() incrementally.
-  If benign errors are disabled use maximum window on ancilliary inflate.
-    This works round a bug introduced in 1.5.4 where compressed ancillary
-    chunks could end up with a too-small windowBits value in the deflate
-    header.
-
-Version 1.6.0beta18 [March 16, 2012]
-  Issue a png_benign_error() instead of png_warning() about bad palette index.
-  In pngtest, treat benign errors as errors if "-strict" is present.
-  Fixed an off-by-one error in the palette index checking function.
-  Fixed a compiler warning under Cygwin (Windows-7, 32-bit system)
-  Revised example.c to put text strings in a temporary character array
-    instead of directly assigning string constants to png_textp members.
-    This avoids compiler warnings when -Wwrite-strings is enabled.
-  Added output flushing to aid debugging under Visual Studio. Unfortunately
-    this is necessary because the VS2010 output window otherwise simply loses
-    the error messages on error (they weren't flushed to the window before
-    the process exited, apparently!)
-  Added configuration support for benign errors and changed the read
-    default. Also changed some warnings in the iCCP and sRGB handling
-    from to benign errors. Configuration now makes read benign
-    errors warnings and write benign errors to errors by default (thus
-    changing the behavior on read).  The simplified API always forces
-    read benign errors to warnings (regardless of the system default, unless
-    this is disabled in which case the simplified API can't be built.)
-
-Version 1.6.0beta19 [March 18,2012]
-  Work around for duplicate row start calls; added warning messages.
-    This turns on PNG_FLAG_DETECT_UNINITIALIZED to detect app code that
-    fails to call one of the 'start' routines (not enabled in libpng-1.5
-    because it is technically an API change, since it did normally work
-    before.)  It also makes duplicate calls to png_read_start_row (an
-    internal function called at the start of the image read) benign, as
-    they were before changes to use png_inflate_claim. Somehow webkit is
-    causing this to happen; this is probably a mis-feature in the zlib
-    changes so this commit is only a work-round.
-  Removed erroneous setting of DETECT_UNINITIALIZED and added more
-    checks. The code now does a png_error if an attempt is made to do the
-    row initialization twice; this is an application error and it has
-    serious consequences because the transform data in png_struct is
-    changed by each call.
-  Added application error reporting and added chunk names to read
-    benign errors; also added --strict to pngstest - not enabled
-    yet because a warning is produced.
-  Avoid the double gamma correction warning in the simplified API.
-    This allows the --strict option to pass in the pngstest checks
-
-Version 1.6.0beta20 [March 29, 2012]
-  Changed chunk handler warnings into benign errors, incrementally load iCCP
-  Added checksum-icc.c to contrib/tools
-  Prevent PNG_EXPAND+PNG_SHIFT doing the shift twice.
-  Recognize known sRGB ICC profiles while reading; prefer writing the
-    iCCP profile over writing the sRGB chunk, controlled by the
-    PNG_sRGB_PROFILE_CHECKS option.
-  Revised png_set_text_2() to avoid potential memory corruption (fixes
-    CVE-2011-3048, also known as CVE-2012-3425).
-
-Version 1.6.0beta21 [April 27, 2012]
-  Revised scripts/makefile.darwin: use system zlib; remove quotes around
-    architecture list; add missing ppc architecture; add architecture options
-    to shared library link; don't try to create a shared lib based on missing
-    RELEASE variable.
-  Enable png_set_check_for_invalid_index() for both read and write.
-  Removed #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED in pngpriv.h around
-    declaration of png_handle_unknown().
-  Added -lssp_nonshared in a comment in scripts/makefile.freebsd
-    and changed deprecated NOOBJ and NOPROFILE to NO_OBJ and NO_PROFILE.
-
-Version 1.6.0beta22 [May 23, 2012]
-  Removed need for -Wno-cast-align with clang.  clang correctly warns on
-    alignment increasing pointer casts when -Wcast-align is passed. This
-    fixes the cases that clang warns about either by eliminating the
-    casts from png_bytep to png_uint_16p (pngread.c), or, for pngrutil.c
-    where the cast is previously verified or pngstest.c where it is OK, by
-    introducing new png_aligncast macros to do the cast in a way that clang
-    accepts.
-
-Version 1.6.0beta23 [June 6, 2012]
-  Revised CMakeLists.txt to not attempt to make a symlink under mingw.
-  Made fixes for new optimization warnings from gcc 4.7.0. The compiler
-    performs an optimization which is safe; however it then warns about it.
-    Changing the type of 'palette_number' in pngvalid.c removes the warning.
-  Do not depend upon a GCC feature macro being available for use in generating
-    the linker mapfile symbol prefix.
-  Improved performance of new do_check_palette_indexes() function (only
-    update the value when it actually increases, move test for whether
-    the check is wanted out of the function.
-
-Version 1.6.0beta24 [June 7, 2012]
-  Don't check palette indexes if num_palette is 0 (as it can be in MNG files).
-
-Version 1.6.0beta25 [June 16, 2012]
-  Revised png_set_keep_unknown_chunks() so num_chunks < 0 means ignore all
-    unknown chunks and all known chunks except for IHDR, PLTE, tRNS, IDAT,
-    and IEND.  Previously it only meant ignore all unknown chunks, the
-    same as num_chunks == 0. Revised png_image_skip_unused_chunks() to
-    provide a list of chunks to be processed instead of a list of chunks to
-    ignore.  Revised contrib/gregbook/readpng2.c accordingly.
-
-Version 1.6.0beta26 [July 10, 2012]
-  Removed scripts/makefile.cegcc from the *.zip and *.7z distributions; it
-    depends on configure, which is not included in those archives.
-  Moved scripts/chkfmt to contrib/tools.
-  Changed "a+w" to "u+w" in Makefile.in to fix CVE-2012-3386.
-
-Version 1.6.0beta27 [August 11, 2012]
-  Do not compile PNG_DEPRECATED, PNG_ALLOC and PNG_PRIVATE when __GNUC__ < 3.
-  Do not use __restrict when GNUC is <= 3.1
-  Removed references to png_zalloc() and png_zfree() from the manual.
-  Fixed configurations where floating point is completely disabled.  Because
-    of the changes to support symbol prefixing PNG_INTERNAL_FUNCTION declares
-    floating point APIs during libpng builds even if they are completely
-    disabled. This requires the png floating point types (png_double*) to be
-    declared even though the functions are never actually defined.  This
-    change provides a dummy definition so that the declarations work, yet any
-    implementation will fail to compile because of an incomplete type.
-  Re-eliminated the use of strcpy() in pngtest.c.  An unncessary use of
-    strcpy() was accidentally re-introduced in libpng16; this change replaces
-    it with strncpy().
-  Eliminated use of png_sizeof(); use sizeof() instead.
-  Use a consistent style for (sizeof type) and (sizeof (array))
-  Cleanup of png_set_filler().  This function does very different things on
-    read and write.  In libpng 1.6 the two cases can be distinguished and
-    considerable code cleanup, and extra error checking, is possible.  This
-    makes calls on the write side that have no effect be ignored with a
-    png_app_error(), which can be disabled in the app using
-    png_set_benign_errors(), and removes the spurious use of usr_channels
-    on the read side.
-  Insist on autotools 1.12.1 for git builds because there are security issues
-    with 1.12 and insisting on anything less would allow 1.12 to be used.
-  Removed info_ptr->signature[8] from WRITE-only builds.
-  Add some conditions for compiling png_fixed().  This is a small function
-    but it requires "-lm" on some platforms.
-  Cause pngtest --strict to fail on any warning from libpng (not just errors)
-    and cause it not to fail at the comparison step if libpng lacks support
-    for writing chunks that it reads from the input (currently only implemented
-    for compressed text chunks).
-  Make all three "make check" test programs work without READ or WRITE support.
-    Now "make check" will succeed even if libpng is compiled with -DPNG_NO_READ
-    or -DPNG_NO_WRITE.  The tests performed are reduced, but the basic reading
-    and writing of a PNG file is always tested by one or more of the tests.
-  Consistently use strlen(), memset(), memcpy(), and memcmp() instead of the
-    png_strlen(), png_memset(), png_memcpy(), and png_memcmp() macros.
-  Removed the png_sizeof(), png_strlen(), png_memset(), png_memcpy(), and
-    png_memcmp() macros.
-  Work around gcc 3.x and Microsoft Visual Studio 2010 complaints. Both object
-    to the split initialization of num_chunks.
-
-Version 1.6.0beta28 [August 29, 2012]
-  Unknown handling fixes and clean up. This adds more correct option
-    control of the unknown handling, corrects the pre-existing bug where
-    the per-chunk 'keep' setting is ignored and makes it possible to skip
-    IDAT chunks in the sequential reader (broken in earlier 1.6 versions).
-    There is a new test program, test-unknown.c, which is a work in progress
-    (not currently part of the test suite).  Comments in the header files now
-    explain how the unknown handling works.
-  Allow fine grain control of unknown chunk APIs. This change allows
-    png_set_keep_unknown_chunks() to be turned off if not required and causes
-    both read and write to behave appropriately (on read this is only possible
-    if the user callback is used to handle unknown chunks).  The change
-    also removes the support for storing unknown chunks in the info_struct
-    if the only unknown handling enabled is via the callback, allowing libpng
-    to be configured with callback reading and none of the unnecessary code.
-  Corrected fix for unknown handling in pngtest. This reinstates the
-    libpng handling of unknown chunks other than vpAg and sTER (including
-    unsafe-to-copy chunks which were dropped before) and eliminates the
-    repositioning of vpAg and sTER in pngtest.png by changing pngtest.png
-    (so the chunks are where libpng would put them).
-  Added "tunknown" test and corrected a logic error in png_handle_unknown()
-    when SAVE support is absent.  Moved the shell test scripts for
-    contrib/libtests from the libpng top directory to contrib/libtests.
-    png_handle_unknown() must always read or skip the chunk, if
-    SAVE_UNKNOWN_CHUNKS is turned off *and* the application does not set
-    a user callback an unknown chunk will not be read, leading to a read
-    error, which was revealed by the "tunknown" test.
-  Cleaned up and corrected ICC profile handling.
-    contrib/libtests/makepng: corrected 'rgb' and 'gray' cases.  profile_error
-    messages could be truncated; made a correct buffer size calculation and
-    adjusted pngerror.c appropriately. png_icc_check_* checking improved;
-    changed the functions to receive the correct color type of the PNG on read
-    or write and check that it matches the color space of the profile (despite
-    what the comments said before, there is danger in assuming the app will
-    cope correctly with an RGB profile on a grayscale image and, since it
-    violates the PNG spec, allowing it is certain to produce inconsistent
-    app behavior and might even cause app crashes.) Check that profiles
-    contain the tags needed to process the PNG (tags all required by the ICC
-    spec). Removed unused PNG_STATIC from pngpriv.h.
-
-Version 1.6.0beta29 [September 4, 2012]
-  Fixed the simplified API example programs and improved the error message
-    if the version field is not set.
-  Added contrib/examples/* to the *.zip and *.7z distributions.
-  Updated simplified API synopses and description of the png_image structure
-    in the manual.
-  Made makepng and pngtest produce identical PNGs, add "--relaxed" option
-    to pngtest. The "--relaxed" option turns off the benign errors that are
-    enabled by default in pre-RC builds. makepng can now write ICC profiles
-    where the length has not been extended to a multiple of 4, and pngtest
-    now intercepts all libpng errors, allowing the previously-introduced
-    "--strict test" on no warnings to actually work.
-  Improved ICC profile handling including cHRM chunk generation and fixed
-    Cygwin+MSVC build errors. The ICC profile handling now includes more
-    checking.  Several errors that caused rejection of the profile are now
-    handled with a warning in such a way that the invalid profiles will be
-    read by default in release (but not pre-RC) builds but will not be
-    written by default.  The easy part of handling the cHRM chunk is written,
-    where the ICC profile contains the required data.  The more difficult
-    part plus guessing a gAMA value requires code to pass selected RGB values
-    through the profile.
-
-Version 1.6.0beta30 [October 24, 2012]
-  Changed ICC profile matrix/vector types to not depend on array type rules.
-    By the ANSI-C standard the new types should be identical to the previous
-    versions, and all known versions of gcc tested with the previous versions
-    except for GCC-4.2.1 work with this version.  The change makes the ANSI-C
-    rule that const applied to an array of elements applies instead to the
-    elements in the array moot by explicitly applying const to the base
-    elements of the png_icc_matrix and png_icc_vector types. The accidental
-    (harmless) 'const' previously applied to the parameters of two of the
-    functions have also been removed.
-  Added a work around for GCC 4.2 optimization bug.
-  Marked the broken (bad white point) original HP sRGB profiles correctly and
-    correct comments.
-  Added -DZ_SOLO to contrib/pngminim/*/makefile to work with zlib-1.2.7
-  Use /MDd for vstudio debug builds. Also added pngunkown to the vstudio
-    builds, fixed build errors and corrected a minor exit code error in
-    pngvalid if the 'touch' file name is invalid.
-  Add updated WARNING file to projects/vstudio from libpng 1.5/vstudio
-  Fixed build when using #define PNG_NO_READ_GAMMA in png_do_compose() in
-    pngrtran.c (Domani Hannes).
-
-Version 1.6.0beta31 [November 1, 2012]
-  Undid the erroneous change to vstudio/pngvalid build in libpng-1.6.0beta30.
-  Made pngvalid so that it will build outside the libpng source tree.
-  Made builds -DPNG_NO_READ_GAMMA compile (the unit tests still fail).
-  Made PNG_NO_READ_GAMMA switch off interfaces that depend on READ_GAMMA.
-    Prior to 1.6.0 switching off READ_GAMMA did unpredictable things to the
-    interfaces that use it (specifically, png_do_background in 1.4 would
-    simply display composite for grayscale images but do composition
-    with the incorrect arithmetic for color ones). In 1.6 the semantic
-    of -DPNG_NO_READ_GAMMA is changed to simply disable any interface that
-    depends on it; this obliges people who set it to consider whether they
-    really want it off if they happen to use any of the interfaces in
-    question (typically most users who disable it won't).
-  Fixed GUIDs in projects/vstudio. Some were duplicated or missing,
-    resulting in VS2010 having to update the files.
-  Removed non-working ICC profile support code that was mostly added to
-    libpng-1.6.0beta29 and beta30. There was too much code for too little
-    gain; implementing full ICC color correction may be desireable but is left
-    up to applications.
-
-Version 1.6.0beta32 [November 25, 2012]
-  Fixed an intermittent SEGV in pngstest due to an uninitialized array element.
-  Added the ability for contrib/libtests/makepng.c to make a PNG with just one
-    color. This is useful for debugging pngstest color inaccuracy reports.
-  Fixed error checking in the simplified write API (Olaf van der Spek)
-  Made png_user_version_check() ok to use with libpng version 1.10.x and later.
-
-Version 1.6.0beta33 [December 10, 2012]
-  Fixed typo in png.c (PNG_SET_CHUNK_MALLOC_MAX should be PNG_CHUNK_MALLOC_MAX)
-    that causes the MALLOC_MAX limit not to work (John Bowler)
-  Change png_warning() to png_app_error() in pngwrite.c and comment the
-    fall-through condition.
-  Change png_warning() to png_app_warning() in png_write_tRNS().
+Version 1.6.1beta02 [February 19, 2013]
+  Use parentheses more consistently in "#if defined(MACRO)" tests.
+  Folded long lines.
+  Reenabled code to allow zero length PLTE chunks for MNG.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit

CHANGES

@@ -3672,7 +3672,8 @@ Version 1.5.6 [November 3, 2011]
   No changes.
 
 Version 1.5.7beta01 [November 4, 2011]
-  Added support for ARM processor (Mans Rullgard)
+  Added support for ARM processor, when decoding all PNG up-filtered rows
+    and any other-filtered rows with 3 or 4 bytes per pixel (Mans Rullgard).
   Fixed bug in pngvalid on early allocation failure; fixed type cast in
     pngmem.c; pngvalid would attempt to call png_error() if the allocation
     of a png_struct or png_info failed. This would probably have led to a
@@ -3779,7 +3780,8 @@ Version 1.5.7 [December 15, 2011]
 
 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).
+    continue to appear in the tarball distributions and in the libpng15 and
+    earlier GIT branches).
   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.
@@ -4304,12 +4306,105 @@ Version 1.6.0beta32 [November 25, 2012]
   Fixed error checking in the simplified write API (Olaf van der Spek)
   Made png_user_version_check() ok to use with libpng version 1.10.x and later.
 
-Version 1.6.0beta33 [December 10, 2012]
+Version 1.6.0beta33 [December 15, 2012]
   Fixed typo in png.c (PNG_SET_CHUNK_MALLOC_MAX should be PNG_CHUNK_MALLOC_MAX)
     that causes the MALLOC_MAX limit not to work (John Bowler)
   Change png_warning() to png_app_error() in pngwrite.c and comment the
     fall-through condition.
   Change png_warning() to png_app_warning() in png_write_tRNS().
+  Rearranged the ARM-NEON optimizations: Isolated the machine specific code
+    to the hardware subdirectory and added comments to pngrutil.c so that
+    implementors of other optimizations know what to do.
+  Fixed cases of unquoted DESTDIR in Makefile.am
+  Rebuilt Makefile.in, etc., with autoconf-2.69 and automake-1.12.5.
+
+Version 1.6.0beta34 [December 19, 2012]
+  Cleaned up whitespace in the synopsis portion of the manpage "libpng.3"
+  Disassembled the version number in scripts/options.awk (necessary for
+    building on SunOs).
+
+Version 1.6.0beta35 [December 23, 2012]
+  Made default Zlib compression settings be configurable. This adds #defines to
+    pnglibconf.h to control the defaults.
+  Fixed Windows build issues, enabled ARM compilation. Various warnings issued
+    by earlier versions of GCC fixed for Cygwin and Min/GW (which both use old
+    GCCs.) ARM support is enabled by default in zlib.props (unsupported by
+    Microsoft) and ARM compilation is made possible by deleting the check for
+    x86. The test programs cannot be run because they are not signed.
+
+Version 1.6.0beta36 [January 2, 2013]
+  Discontinued distributing libpng-1.x.x.tar.bz2.
+  Discontinued distributing libpng-1.7.0-1.6.0-diff.txt and similar.
+  Rebuilt configure with autoconf-2.69 (inadvertently not done in beta33)
+  Fixed 'make distcheck' on SUN OS - libpng.so was not being removed
+
+Version 1.6.0beta37 [January 10, 2013]
+  Fixed conceivable but difficult to repro overflow. Also added two test
+    programs to generate and test a PNG which should have the problem.
+
+Version 1.6.0beta39 [January 19, 2013]
+  Again corrected attempt at overflow detection in png_set_unknown_chunks().
+  Added overflow detection in png_set_sPLT() and png_set_text_2().
+
+Version 1.6.0beta40 [January 20, 2013]
+  Use consistent handling of overflows in text, sPLT and unknown png_set_* APIs
+
+Version 1.6.0rc01 [January 26, 2013]
+  No changes.
+
+Version 1.6.0rc02 [February 4, 2013]
+  Added png_get_palette_max() function.
+
+Version 1.6.0rc03 [February 5, 2013]
+  Fixed the png_get_palette_max API.
+
+Version 1.6.0rc04 [February 7, 2013]
+  Turn serial tests back on (recently turned off by autotools upgrade).
+
+Version 1.6.0rc05 [February 8, 2013]
+  Update manual about png_get_palette_max().
+
+Version 1.6.0rc06 [February 9, 2013]
+  Fixed missing dependency in --prefix builds The intermediate
+    internal 'prefix.h' file can only be generated correctly after
+    pnglibconf.h, however the dependency was not in Makefile.am.  The
+    symptoms are unpredictable depending on the order make chooses to
+    build pngprefix.h and pnglibconf.h, often the error goes unnoticed
+    because there is a system pnglibconf.h to use instead.
+
+Version 1.6.0rc07 [February 10, 2013]
+  Enclosed the new png_get_palette_max in #ifdef PNG_GET_PALETTE_MAX_SUPPORTED
+    block, and revised pnglibconf.h and pnglibconf.h.prebuilt accordingly.
+
+Version 1.6.0rc08 [February 10, 2013]
+  Fix typo in png.h #ifdef
+
+Version 1.6.0 [February 14, 2013]
+  No changes.
+
+Version 1.6.1beta01 [February 16, 2013]
+  Made symbol prefixing work with the ARM neon optimizations. Also allow
+    pngpriv.h to be included for preprocessor definitions only, so it can
+    be used in non-C/C++ files. Back ported from libpng 1.7.
+  Made sRGB check numbers consistent.
+  Ported libpng 1.5 options.awk/dfn file handling to 1.6, fixed one bug.
+  Removed cc -E workround, corrected png_get_palette_max API Tested on
+    SUN OS cc 5.9, which demonstrates the tokenization problem previously
+    avoided by using /lib/cpp.  Since all .dfn output is now protected in
+    double quotes unless it is to be macro substituted the fix should
+    work everywhere.
+  Enabled parallel tests - back ported from libpng-1.7.
+  scripts/pnglibconf.dfa formatting improvements back ported from libpng17.
+  Fixed a race condition in the creation of the build 'scripts' directory
+    while building with a parallel make.
+  Use approved/supported Android method to check for NEON, use Linux/POSIX
+    1003.1 API to check /proc/self/auxv avoiding buffer allocation and other
+    library calls (ported from libpng15).
+
+Version 1.6.1beta02 [February 19, 2013]
+  Use parentheses more consistently in "#if defined(MACRO)" tests.
+  Folded long lines.
+  Reenabled code to allow zero length PLTE chunks for MNG.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit

CMakeLists.txt

@@ -35,7 +35,7 @@ enable_testing()
 
 set(PNGLIB_MAJOR 1)
 set(PNGLIB_MINOR 6)
-set(PNGLIB_RELEASE 0)
+set(PNGLIB_RELEASE 1)
 set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
 set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
 
@@ -260,7 +260,7 @@ endif(NOT WIN32 OR CYGWIN OR MINGW)
 # SET UP LINKS
 if(PNG_SHARED)
   set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#   VERSION 16.${PNGLIB_RELEASE}.1.6.0beta33
+#   VERSION 16.${PNGLIB_RELEASE}.1.6.1beta02
     VERSION 16.${PNGLIB_RELEASE}.0
     SOVERSION 16
     CLEAN_DIRECT_OUTPUT 1)

LICENSE

@@ -10,7 +10,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.6.0beta33, December 10, 2012, are
+libpng versions 1.2.6, August 15, 2004, through 1.6.1beta02, February 19, 2013, are
 Copyright (c) 2004, 2006-2012 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
-December 10, 2012
+February 19, 2013

Makefile.am

@@ -7,24 +7,44 @@ PNGLIB_BASENAME= libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@
 ACLOCAL_AMFLAGS = -I scripts
 
 # test programs - run on make check, make distcheck
-TESTS_ENVIRONMENT= srcdir=$(srcdir)
-check_PROGRAMS= pngtest
+check_PROGRAMS= pngtest pngunknown pngstest pngvalid
+
 pngtest_SOURCES = pngtest.c
 pngtest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la
-TESTS = test-pngtest.sh
 
-# Only do the following if the contrib directory is present.
-check_PROGRAMS+= pngvalid pngstest pngunknown
 pngvalid_SOURCES = contrib/libtests/pngvalid.c
-pngstest_SOURCES = contrib/libtests/pngstest.c
-pngunknown_SOURCES = contrib/libtests/pngunknown.c
 pngvalid_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la
+
+pngstest_SOURCES = contrib/libtests/pngstest.c
 pngstest_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la
+
+pngunknown_SOURCES = contrib/libtests/pngunknown.c
 pngunknown_LDADD = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.la
-TESTS += contrib/libtests/test-pngunknown.sh\
-	 contrib/libtests/test-pngvalid-simple.sh\
-	 contrib/libtests/test-pngvalid-full.sh\
-	 contrib/libtests/test-pngstest.sh
+
+# Generally these are single line shell scripts to run a test with a particular
+# set of parameters:
+TESTS =\
+   tests/pngvalid-gamma-16-to-8 tests/pngvalid-gamma-alpha-mode\
+   tests/pngvalid-gamma-background tests/pngvalid-gamma-expand16-alpha-mode\
+   tests/pngvalid-gamma-expand16-background\
+   tests/pngvalid-gamma-expand16-transform tests/pngvalid-gamma-sbit\
+   tests/pngvalid-gamma-threshold tests/pngvalid-gamma-transform\
+   tests/pngvalid-progressive-interlace-size\
+   tests/pngvalid-progressive-interlace-standard\
+   tests/pngvalid-progressive-interlace-transform\
+   tests/pngvalid-progressive-standard tests/pngvalid-standard\
+   tests/pngtest\
+   tests/pngstest-0g01 tests/pngstest-0g02 tests/pngstest-0g04\
+   tests/pngstest-0g08 tests/pngstest-0g16 tests/pngstest-2c08\
+   tests/pngstest-2c16 tests/pngstest-3p01 tests/pngstest-3p02\
+   tests/pngstest-3p04 tests/pngstest-3p08 tests/pngstest-4a08\
+   tests/pngstest-4a16 tests/pngstest-6a08 tests/pngstest-6a16\
+   tests/pngstest-error tests/pngunknown-IDAT\
+   tests/pngunknown-discard tests/pngunknown-if-safe tests/pngunknown-sAPI\
+   tests/pngunknown-sTER tests/pngunknown-save tests/pngunknown-vpAg
+
+# These tests are expected, and required, to fail:
+XFAIL_TESTS = tests/pngstest-error
 
 # man pages
 dist_man_MANS= libpng.3 libpngpf.3 png.5
@@ -43,7 +63,8 @@ libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = png.c pngerror.c\
 	png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h pngusr.dfa
 
 if PNG_ARM_NEON
-libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += arm/filter_neon.S
+libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += arm/arm_init.c\
+	arm/filter_neon.S
 endif
 
 nodist_libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = pnglibconf.h
@@ -76,12 +97,14 @@ nodist_pkginclude_HEADERS= pnglibconf.h
 pkgconfigdir = @pkgconfigdir@
 pkgconfig_DATA = libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc
 
-#extra source distribution files.
+# Extra source distribution files, '${srcdir}' is used below to stop build files
+# from those directories being included.  This only works if the configure is
+# not done in the source directory!
 EXTRA_DIST= \
 	ANNOUNCE CHANGES INSTALL LICENSE README TODO \
 	pngtest.png pngbar.png pngnow.png pngbar.jpg autogen.sh \
 	${srcdir}/contrib ${srcdir}/projects ${srcdir}/scripts \
-	$(TESTS) \
+	$(TESTS) $(XFAIL_TESTS) tests/pngstest \
 	CMakeLists.txt example.c libpng-manual.txt
 
 SCRIPT_CLEANFILES=scripts/*.out scripts/*.chk scripts/pnglibconf.dfn
@@ -118,6 +141,7 @@ $(PNGLIB_BASENAME)-config: 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
+scripts/intprefix.out: pnglibconf.h
 
 libpng.sym: scripts/sym.out
 	rm -f $@
@@ -178,16 +202,14 @@ SYMBOL_CFLAGS += -DPNG_PREFIX='@PNG_PREFIX@'
 endif
 
 .dfn.out:
-	rm -f $@ $*.c $*.tf[123]
-	test -d scripts || mkdir scripts
+	rm -f $@ $*.c $*.tf[12]
+	test -d scripts || mkdir scripts || test -d scripts
 	echo '#include "$<"' >$*.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 $@
+	$(AWK) -f "${srcdir}/scripts/dfn.awk" out="$*.tf2" $*.tf1 1>&2
+	rm -f $*.c $*.tf1
+	mv $*.tf2 $@
 
 # The .dfn file for pnglibconf.h is machine generated
 pnglibconf.dfn: scripts/pnglibconf.dfa scripts/options.awk pngconf.h pngusr.dfa $(DFA_XTRA)
@@ -236,22 +258,24 @@ dist-hook:
 
 # 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); $(LN_S) $(PNGLIB_BASENAME)/png.h png.h
-	cd $(DESTDIR)$(includedir); $(LN_S) $(PNGLIB_BASENAME)/pngconf.h \
+	cd '$(DESTDIR)$(includedir)'; rm -f png.h pngconf.h pnglibconf.h
+	cd '$(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) $(PNGLIB_BASENAME)/pnglibconf.h \
+	cd '$(DESTDIR)$(includedir)'; $(LN_S) $(PNGLIB_BASENAME)/pnglibconf.h \
 		pnglibconf.h
-	cd $(DESTDIR)$(pkgconfigdir); rm -f libpng.pc
-	cd $(DESTDIR)$(pkgconfigdir); $(LN_S) $(PNGLIB_BASENAME).pc libpng.pc
+	cd '$(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
 install-exec-hook:
-	cd $(DESTDIR)$(bindir); rm -f libpng-config
-	cd $(DESTDIR)$(bindir); $(LN_S) $(PNGLIB_BASENAME)-config libpng-config
+	cd '$(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\
+	cd '$(DESTDIR)$(libdir)';\
+	for ext in a la so so.@PNGLIB_MAJOR@@PNGLIB_MINOR@.@PNGLIB_RELEASE@\
+	   sl dylib dll.a; do\
 		rm -f libpng.$$ext;\
                 if test -f $(PNGLIB_BASENAME).$$ext; then\
                        $(LN_S) $(PNGLIB_BASENAME).$$ext libpng.$$ext;\
@@ -259,9 +283,13 @@ install-exec-hook:
 	done
 
 uninstall-hook:
-	cd $(DESTDIR)$(includedir); rm -f png.h pngconf.h pnglibconf.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
+	cd '$(DESTDIR)$(includedir)'; rm -f png.h pngconf.h pnglibconf.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.so'
+	rm -f '$(DESTDIR)$(libdir)/libpng.so.@PNGLIB_MAJOR@@PNGLIB_MINOR@.@PNGLIB_RELEASE@'
+	rm -f '$(DESTDIR)$(libdir)/libpng.sl'
+	rm -f '$(DESTDIR)$(libdir)/libpng.dylib'
+	rm -f '$(DESTDIR)$(libdir)/libpng.dll.a'

README

@@ -1,4 +1,4 @@
-README for libpng version 1.6.0beta33 - December 10, 2012 (shared library 16.0)
+README for libpng version 1.6.1beta02 - February 19, 2013 (shared library 16.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.

arm/arm_init.c

@@ -0,0 +1,195 @@
+
+/* arm_init.c - NEON optimised filter functions
+ *
+ * Copyright (c) 2013 Glenn Randers-Pehrson
+ * Written by Mans Rullgard, 2011.
+ * Last changed in libpng 1.5.15 [%RDATE%]
+ *
+ * This code is released under the libpng license.
+ * For conditions of distribution and use, see the disclaimer
+ * and license in png.h
+ */
+/* Below, after checking __linux__, various non-C90 POSIX 1003.1 functions are
+ * called.
+ */
+#define _POSIX_SOURCE 1
+
+#include "../pngpriv.h"
+
+/* __arm__ is defined by GCC, MSVC defines _M_ARM to the ARM version number,
+ * Andoid intends to define __ANDROID__, however there are bugs in their
+ * toolchain; use -D__ANDROID__ to work round this.
+ */
+#if defined(__linux__) && defined(__arm__)
+#define CHECK_NEON
+#include <signal.h> /* for sig_atomic_t */
+
+#ifdef __ANDROID__
+/* Linux provides access to information about CPU capabilites via
+ * /proc/self/auxv, however Android blocks this while still claiming to be
+ * Linux.  The Andoid NDK, however, provides appropriate support.
+ *
+ * Documentation: http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html
+ */
+#include <cpu-features.h>
+
+static int
+png_have_neon(png_structp png_ptr)
+{
+   /* This is a whole lot easier than the mess below, however it is probably
+    * implemented as below, therefore it is better to cache the result (these
+    * function calls may be slow!)
+    */
+   return andoid_getCpuFamily() == ANDROID_CPU_FAMILY_ARM &&
+      (android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0;
+}
+#else
+/* The generic __linux__ implementation requires reading /proc/self/auxv and
+ * looking at each element for one that records NEON capabilities.
+ */
+#include <unistd.h> /* for POSIX 1003.1 */
+#include <errno.h>  /* for EINTR */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <elf.h>
+#include <asm/hwcap.h>
+
+/* A read call may be interrupted, in which case it returns -1 and sets errno to
+ * EINTR if nothing was done, otherwise (if something was done) a partial read
+ * may result.
+ */
+static size_t
+safe_read(png_structp png_ptr, int fd, void *buffer_in, size_t nbytes)
+{
+   size_t ntotal = 0;
+   char *buffer = png_voidcast(char*, buffer_in);
+
+   while (nbytes > 0)
+   {
+      unsigned int nread;
+      int iread;
+
+      /* Passing nread > INT_MAX to read is implementation defined in POSIX
+       * 1003.1, therefore despite the unsigned argument portable code must
+       * limit the value to INT_MAX!
+       */
+      if (nbytes > INT_MAX)
+         nread = INT_MAX;
+
+      else
+         nread = (unsigned int)/*SAFE*/nbytes;
+
+      iread = read(fd, buffer, nread);
+
+      if (iread == -1)
+      {
+         /* This is the devil in the details, a read can terminate early with 0
+          * bytes read because of EINTR, yet it still returns -1 otherwise end
+          * of file cannot be distinguished.
+          */
+         if (errno != EINTR)
+         {
+            png_warning(png_ptr, "/proc read failed");
+            return 0; /* I.e. a permanent failure */
+         }
+      }
+
+      else if (iread < 0)
+      {
+         /* Not a valid 'read' result: */
+         png_warning(png_ptr, "OS /proc read bug");
+         return 0;
+      }
+
+      else if (iread > 0)
+      {
+         /* Continue reading until a permanent failure, or EOF */
+         buffer += iread;
+         nbytes -= (unsigned int)/*SAFE*/iread;
+         ntotal += (unsigned int)/*SAFE*/iread;
+      }
+
+      else
+         return ntotal;
+   }
+
+   return ntotal; /* nbytes == 0 */
+}
+
+static int
+png_have_neon(png_structp png_ptr)
+{
+   int fd = open("/proc/self/auxv", O_RDONLY);
+   Elf32_auxv_t aux;
+
+   /* Failsafe: failure to open means no NEON */
+   if (fd == -1)
+   {
+      png_warning(png_ptr, "/proc/self/auxv open failed");
+      return 0;
+   }
+
+   while (safe_read(png_ptr, fd, &aux, sizeof aux) == sizeof aux)
+   {
+      if (aux.a_type == AT_HWCAP && (aux.a_un.a_val & HWCAP_NEON) != 0)
+      {
+         close(fd);
+         return 1;
+      }
+   }
+
+   close(fd);
+   return 0;
+}
+#endif /* !__ANDROID__ */
+#endif /* __linux__ && __arm__ */
+
+void
+png_init_filter_functions_neon(png_structp pp, unsigned int bpp)
+{
+#ifdef __arm__
+#ifdef CHECK_NEON
+   static volatile sig_atomic_t no_neon = -1; /* not checked */
+
+   if (no_neon < 0)
+      no_neon = !png_have_neon(pp);
+
+   if (no_neon)
+      return;
+#endif
+
+   /* IMPORTANT: any new external functions used here must be declared using
+    * PNG_INTERNAL_FUNCTION in ../pngpriv.h.  This is required so that the
+    * 'prefix' option to configure works:
+    *
+    *    ./configure --with-libpng-prefix=foobar_
+    *
+    * Verify you have got this right by running the above command, doing a build
+    * and examining pngprefix.h; it must contain a #define for every external
+    * function you add.  (Notice that this happens automatically for the
+    * initialization function.)
+    */
+   pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon;
+
+   if (bpp == 3)
+   {
+      pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_neon;
+      pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_neon;
+      pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
+         png_read_filter_row_paeth3_neon;
+   }
+
+   else if (bpp == 4)
+   {
+      pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_neon;
+      pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_neon;
+      pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
+          png_read_filter_row_paeth4_neon;
+   }
+#else
+   PNG_UNUSED(pp)
+   PNG_UNUSED(bpp)
+#endif
+}

arm/filter_neon.S

@@ -3,12 +3,18 @@
  *
  * Copyright (c) 2011 Glenn Randers-Pehrson
  * Written by Mans Rullgard, 2011.
+ * Last changed in libpng 1.5.7 [December 15, 2011]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
  * and license in png.h
  */
 
+/* This is required to get the symbol renames, which are #defines */
+#define PNG_VERSION_INFO_ONLY
+#include "../pngpriv.h"
+
+#ifdef __arm__
 #if defined(__linux__) && defined(__ELF__)
 .section .note.GNU-stack,"",%progbits /* mark stack as non-executable */
 #endif
@@ -223,3 +229,4 @@ func    png_read_filter_row_paeth3_neon, export=1
 
         pop             {r4,pc}
 endfunc
+#endif

autogen.sh

@@ -74,7 +74,7 @@ done
 #
 # 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"
+   config.sub configure depcomp install-sh ltmain.sh missing test-driver"
 #
 # These are separate because 'maintainer-clean' does not remove them.
 libpng_libtool_files="scripts/libtool.m4 scripts/ltoptions.m4\

configure.ac

@@ -18,7 +18,7 @@ AC_PREREQ([2.68])
 
 dnl Version number stuff here:
 
-AC_INIT([libpng],[1.6.0beta33],[png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng],[1.6.1beta02],[png-mng-implement@lists.sourceforge.net])
 AC_CONFIG_MACRO_DIR([scripts])
 
 # libpng does not follow GNU file name conventions (hence 'foreign')
@@ -26,9 +26,11 @@ AC_CONFIG_MACRO_DIR([scripts])
 # silent-rules requires automake 1.11 or later
 # dist-xz requires automake 1.11 or later
 # 1.12.2 fixes a security issue in 1.11.2 and 1.12.1
-AM_INIT_AUTOMAKE([1.12.2 foreign dist-xz dist-bzip2 color-tests silent-rules])
-# was:
-# AM_INIT_AUTOMAKE
+# 1.13 is required for parallel tests
+AM_INIT_AUTOMAKE([1.13 foreign dist-xz color-tests silent-rules])
+# The following line causes --disable-maintainer-mode to be the default to
+# configure, this is necessary because libpng distributions cannot rely on the
+# time stamps of the autotools generated files being correct
 AM_MAINTAINER_MODE
 
 dnl configure.ac and Makefile.am expect automake 1.11.2 or a compatible later
@@ -37,10 +39,10 @@ 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=1.6.0beta33
+PNGLIB_VERSION=1.6.1beta02
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=6
-PNGLIB_RELEASE=0
+PNGLIB_RELEASE=1
 
 dnl End of version number stuff
 
@@ -53,8 +55,7 @@ AC_PROG_CC
 AM_PROG_AS
 LT_PATH_LD
 AC_PROG_CPP
-AC_CHECK_TOOL(SED, sed, :)
-AC_CHECK_TOOL(AWK, awk, :)
+AC_PROG_AWK
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_MAKE_SET
@@ -64,30 +65,23 @@ 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)
+# Some awks crash when confronted with pnglibconf.dfa, do a test run now
+# to make sure this doesn't happen
+AC_MSG_CHECKING([that AWK works])
+if ${AWK} -f ${srcdir}/scripts/options.awk out="/dev/null" version=search\
+   ${srcdir}/pngconf.h ${srcdir}/scripts/pnglibconf.dfa\
+   ${srcdir}/pngusr.dfa 1>&2
+then
+   AC_MSG_RESULT([ok])
 else
-   AC_MSG_FAILURE([not found], 1)
+   AC_MSG_FAILURE([failed], 1)
 fi
 
+# This is a remnant of the old cc -E validation, where it may have been
+# necessary to use a different preprocessor for .dfn files
+DFNCPP="$CPP"
+AC_SUBST(DFNCPP)
+
 # -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
@@ -115,7 +109,6 @@ AC_ARG_ENABLE(werror,
 
 # Checks for header files.
 AC_HEADER_STDC
-AC_CHECK_HEADERS([malloc.h stdlib.h string.h strings.h])
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
@@ -241,8 +234,11 @@ AC_SUBST([AM_CCASFLAGS], [-Wa,--noexecstack])
 AC_ARG_ENABLE([arm-neon],
    AS_HELP_STRING([[[--enable-arm-neon]]], [Enable ARM NEON optimizations]),
    [if test "${enableval}" = "yes"; then
-      AC_DEFINE([PNG_ARM_NEON], [1], [Enable ARM NEON optimizations])
-      AC_DEFINE([PNG_ALIGNED_MEMORY_SUPPORTED], [1], [Align row buffers])
+      AC_DEFINE([PNG_FILTER_OPTIMIZATIONS],
+                [png_init_filter_functions_neon],
+                [ARM NEON filter initialization function])
+      AC_DEFINE([PNG_ALIGNED_MEMORY_SUPPORTED], [1],
+                [Align row buffers])
     fi])
 AM_CONDITIONAL([PNG_ARM_NEON], [test "${enable_arm_neon:-no}" = yes])
 

contrib/libtests/fakepng.c

@@ -0,0 +1,57 @@
+/* Fake a PNG - just write it out directly. */
+#include <stdio.h>
+#include <zlib.h> /* for crc32 */
+
+void
+put_uLong(uLong val)
+{
+   putchar(val >> 24);
+   putchar(val >> 16);
+   putchar(val >>  8);
+   putchar(val >>  0);
+}
+
+void
+put_chunk(const unsigned char *chunk, uInt length)
+{
+   uLong crc;
+
+   put_uLong(length-4); /* Exclude the tag */
+
+   fwrite(chunk, length, 1, stdout);
+
+   crc = crc32(0, Z_NULL, 0);
+   put_uLong(crc32(crc, chunk, length));
+}
+
+const unsigned char signature[] =
+{
+   137, 80, 78, 71, 13, 10, 26, 10
+};
+
+const unsigned char IHDR[] =
+{
+   73, 72, 68, 82, /* IHDR */
+   0, 0, 0, 1, /* width */
+   0, 0, 0, 1, /* height */
+   1, /* bit depth */
+   0, /* color type: greyscale */
+   0, /* compression method */
+   0, /* filter method */
+   0  /* interlace method: none */
+};
+
+const unsigned char unknown[] =
+{
+   'u', 'n', 'K', 'n' /* "unKn" - private safe to copy */
+};
+
+int
+main(void)
+{
+   fwrite(signature, sizeof signature, 1, stdout);
+   put_chunk(IHDR, sizeof IHDR);
+
+   for(;;)
+      put_chunk(unknown, sizeof unknown);
+}

contrib/libtests/gentests.sh

@@ -1,8 +1,8 @@
 #!/bin/sh
 #
-# Copyright (c) 2012 John Cunningham Bowler
+# Copyright (c) 2013 John Cunningham Bowler
 #
-# Last changed in libpng 1.6.0 [(PENDING RELEASE)]
+# Last changed in libpng 1.6.0 [February 14, 2013]
 #
 # This code is released under the libpng license.
 # For conditions of distribution and use, see the disclaimer

contrib/libtests/makepng.c

@@ -1,8 +1,8 @@
 /* makepng.c
  *
- * Copyright (c) 2012 John Cunningham Bowler
+ * Copyright (c) 2013 John Cunningham Bowler
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.0 [February 14, 2013]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
@@ -83,7 +83,7 @@
 #include <math.h>
 #include <errno.h>
 
-#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H)
+#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H)
 #  include <config.h>
 #endif
 

contrib/libtests/pngstest.c

@@ -1,9 +1,9 @@
 /*-
  * pngstest.c
  *
- * Copyright (c) 2012 John Cunningham Bowler
+ * Copyright (c) 2013 John Cunningham Bowler
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.0 [February 14, 2013]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
@@ -22,7 +22,7 @@
 #include <ctype.h>
 #include <math.h>
 
-#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H)
+#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H)
 #  include <config.h>
 #endif
 
@@ -62,6 +62,12 @@
 #  define aligncastconst(type, value) ((const void*)(value))
 #endif /* __cplusplus */
 
+/* During parallel runs of pngstest each temporary file needs a unique name,
+ * this is used to permit uniqueness using a command line argument which can be
+ * up to 22 characters long.
+ */
+static char tmpf[23] = "TMP";
+
 /* Generate random bytes.  This uses a boring repeatable algorithm and it
  * is implemented here so that it gives the same set of numbers on every
  * architecture.  It's a linear congruential generator (Knuth or Sedgewick
@@ -3198,7 +3204,7 @@ write_one_file(Image *output, Image *image, int convert_to_8bit)
       static int counter = 0;
       char name[32];
 
-      sprintf(name, "TMP%d.png", ++counter);
+      sprintf(name, "%s%d.png", tmpf, ++counter);
 
       if (png_image_write_to_file(&image->image, name, convert_to_8bit,
          image->buffer+16, (png_int_32)image->stride, image->colormap))
@@ -3482,6 +3488,30 @@ main(int argc, char **argv)
          opts &= ~KEEP_GOING;
       else if (strcmp(arg, "--strict") == 0)
          opts |= STRICT;
+      else if (strcmp(arg, "--tmpfile") == 0)
+      {
+         if (c+1 < argc)
+         {
+            if (strlen(argv[++c]) >= sizeof tmpf)
+            {
+               fflush(stdout);
+               fprintf(stderr, "%s: %s is too long for a temp file prefix\n",
+                  argv[0], argv[c]);
+               exit(99);
+            }
+
+            /* Safe: checked above */
+            strcpy(tmpf, argv[c]);
+         }
+
+         else
+         {
+            fflush(stdout);
+            fprintf(stderr, "%s: %s requires a temporary file prefix\n",
+               argv[0], arg);
+            exit(99);
+         }
+      }
       else if (strcmp(arg, "--touch") == 0)
       {
          if (c+1 < argc)
@@ -3492,7 +3522,7 @@ main(int argc, char **argv)
             fflush(stdout);
             fprintf(stderr, "%s: %s requires a file name argument\n",
                argv[0], arg);
-            exit(1);
+            exit(99);
          }
       }
       else if (arg[0] == '+')
@@ -3500,7 +3530,7 @@ main(int argc, char **argv)
          png_uint_32 format = formatof(arg+1);
 
          if (format > FORMAT_COUNT)
-            exit(1);
+            exit(99);
 
          format_set(&formats, format);
       }
@@ -3508,7 +3538,7 @@ main(int argc, char **argv)
       {
          fflush(stdout);
          fprintf(stderr, "%s: unknown option: %s\n", argv[0], arg);
-         exit(1);
+         exit(99);
       }
       else
       {
@@ -3557,7 +3587,7 @@ main(int argc, char **argv)
                buffer[4095] = 0;
                fprintf(stderr, "%s...%s: file name too long\n", buffer,
                   buffer+(4096-32));
-               exit(1);
+               exit(99);
             }
          }
 
@@ -3676,7 +3706,7 @@ main(int argc, char **argv)
          {
             fflush(stdout);
             fprintf(stderr, "%s: write failed\n", touch);
-            exit(1);
+            exit(99);
          }
       }
 
@@ -3684,7 +3714,7 @@ main(int argc, char **argv)
       {
          fflush(stdout);
          fprintf(stderr, "%s: open failed\n", touch);
-         exit(1);
+         exit(99);
       }
    }
 
@@ -3695,6 +3725,7 @@ main(int argc, char **argv)
 int main(void)
 {
    fprintf(stderr, "pngstest: no read support in libpng, test skipped\n");
-   return 0;
+   /* So the test is skipped: */
+   return 77;
 }
 #endif /* PNG_SIMPLIFIED_READ_SUPPORTED */

contrib/libtests/pngunknown.c

@@ -2,7 +2,7 @@
 /* pngunknown.c - test the read side unknown chunk handling
  *
  * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 2012 Glenn Randers-Pehrson
+ * Copyright (c) 2013 Glenn Randers-Pehrson
  * Written by John Cunningham Bowler
  *
  * This code is released under the libpng license.
@@ -308,7 +308,7 @@ warning(png_structp png_ptr, const char *message)
 }
 
 static png_uint_32
-get_valid(display *d, png_const_infop info_ptr)
+get_valid(display *d, png_infop info_ptr)
 {
    png_uint_32 flags = png_get_valid(d->png_ptr, info_ptr, (png_uint_32)~0);
 
@@ -340,7 +340,7 @@ get_valid(display *d, png_const_infop info_ptr)
 }
 
 static png_uint_32
-get_unknown(display *d, int def, png_const_infop info_ptr)
+get_unknown(display *d, int def, png_infop info_ptr)
 {
    /* Create corresponding 'unknown' flags */
    png_uint_32 flags = 0;

contrib/libtests/pngvalid.c

@@ -1,8 +1,8 @@
 
 /* pngvalid.c - validate libpng by constructing then reading png files.
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Copyright (c) 2013 Glenn Randers-Pehrson
  * Written by John Cunningham Bowler
  *
  * This code is released under the libpng license.
@@ -26,7 +26,7 @@
 #include <signal.h>
 #include <stdio.h>
 
-#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H)
+#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H)
 #  include <config.h>
 #endif
 
@@ -1999,8 +1999,8 @@ static double digitize(PNG_CONST png_modifier *pm, double value,
 }
 #endif
 
-#if (defined PNG_READ_GAMMA_SUPPORTED) ||\
-   (defined PNG_READ_RGB_TO_GRAY_SUPPORTED)
+#if defined(PNG_READ_GAMMA_SUPPORTED) ||\
+   defined(PNG_READ_RGB_TO_GRAY_SUPPORTED)
 static double abserr(PNG_CONST png_modifier *pm, int in_depth, int out_depth)
 {
    /* Absolute error permitted in linear values - affected by the bit depth of
@@ -3357,7 +3357,7 @@ make_transform_image(png_store* PNG_CONST ps, png_byte PNG_CONST colour_type,
          PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
 
 #ifdef PNG_TEXT_SUPPORTED
-#  if (defined PNG_READ_zTXt_SUPPORTED) && (defined PNG_WRITE_zTXt_SUPPORTED)
+#  if defined(PNG_READ_zTXt_SUPPORTED) && defined(PNG_WRITE_zTXt_SUPPORTED)
 #     define TEXT_COMPRESSION PNG_TEXT_COMPRESSION_zTXt
 #  else
 #     define TEXT_COMPRESSION PNG_TEXT_COMPRESSION_NONE
@@ -4754,7 +4754,7 @@ standard_check_text(png_const_structp pp, png_const_textp tp,
 
 static void
 standard_text_validate(standard_display *dp, png_const_structp pp,
-   png_const_infop pi)
+   png_infop pi)
 {
    png_textp tp = NULL;
    png_uint_32 num_text = png_get_text(pp, pi, &tp, NULL);
@@ -8895,8 +8895,8 @@ static void perform_gamma_scale16_tests(png_modifier *pm)
 }
 #endif /* 16 to 8 bit conversion */
 
-#if defined PNG_READ_BACKGROUND_SUPPORTED ||\
-   defined PNG_READ_ALPHA_MODE_SUPPORTED
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
+   defined(PNG_READ_ALPHA_MODE_SUPPORTED)
 static void gamma_composition_test(png_modifier *pm,
    PNG_CONST png_byte colour_type, PNG_CONST png_byte bit_depth,
    PNG_CONST int palette_number,

contrib/libtests/readpng.c

@@ -0,0 +1,104 @@
+/* readpng.c
+ *
+ * Copyright (c) 2013 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.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.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_set_keep_unknown_chunks(png_ptr, PNG_HANDLE_CHUNK_ALWAYS, NULL, 0);
+
+   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;
+}
+
+int
+main(void)
+{
+   /* Exit code 0 on success. */
+   return !read_png(stdin);
+}

contrib/libtests/tarith.c

@@ -1,9 +1,9 @@
 
 /* tarith.c
  *
- * Copyright (c) 2011,2012 John Cunningham Bowler
+ * Copyright (c) 2011-2013 John Cunningham Bowler
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.0 [February 14, 2013]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer

contrib/libtests/test-pngstest.sh

@@ -1,24 +0,0 @@
-#!/bin/sh
-#
-# Run the simplified API tests
-err=0
-
-echo >> pngtest-log.txt
-echo "============ pngstest.sh ==============" >> pngtest-log.txt
-
-echo "Running test-pngstest.sh"
-for image in ${srcdir}/contrib/pngsuite/*.png
-do
-   for opts in ""
-   do
-      if ./pngstest --strict --log "$@" $opts $image >>pngtest-log.txt 2>&1
-      then
-         echo "  PASS: pngstest $opts $image"
-      else
-         echo "  FAIL: pngstest $opts $image"
-         err=1
-      fi
-   done
-done
-
-exit $err

contrib/libtests/test-pngunknown.sh

@@ -1,38 +0,0 @@
-#!/bin/sh
-#
-# Run the unknown API tests
-err=0
-image="${srcdir}/pngtest.png"
-#
-# stream 4 is used for the output of the shell, pngtest-log.txt gets all the
-# normal program output.
-exec 4>&1 1>>pngtest-log.txt 2>&1
-
-echo
-echo "============ test-pngunknown.sh =============="
-
-echo "Running test-pngunknown.sh" >&4
-
-for tests in \
- "discard default=discard"\
- "save default=save"\
- "if-safe default=if-safe"\
- "vpAg vpAg=if-safe"\
- "sTER sTER=if-safe"\
- "IDAT default=discard IDAT=save"\
- "sAPI bKGD=save cHRM=save gAMA=save all=discard iCCP=save sBIT=save sRGB=save"
-do
-   set $tests
-   test="$1"
-   shift
-
-   if ./pngunknown "$@" "$image" 4>&-
-   then
-      echo "  PASS: test-pngunknown $test" >&4
-   else
-      echo "  FAIL: test-pngunknown $test" >&4
-      err=1
-   fi
-done
-
-exit $err

contrib/libtests/test-pngvalid-full.sh

@@ -1,21 +0,0 @@
-#!/bin/sh
-#
-# Run a sequence of gamma tests quietly
-err=0
-
-echo >> pngtest-log.txt
-echo "============ pngvalid-full.sh ==============" >> pngtest-log.txt
-
-echo "Running test-pngvalid-full.sh"
-for gamma in threshold transform sbit 16-to-8 background alpha-mode "transform --expand16" "background --expand16" "alpha-mode --expand16"
-do
-   if ./pngvalid "$@" --gamma-$gamma >> pngtest-log.txt 2>&1
-   then
-      echo "  PASS: pngvalid" "$@" "--gamma-$gamma"
-   else
-      echo "  FAIL: pngvalid" "$@" "--gamma-$gamma"
-      err=1
-   fi
-done
-
-exit $err

contrib/libtests/test-pngvalid-simple.sh

@@ -1,30 +0,0 @@
-#!/bin/sh
-#
-# Run a sequence of tests quietly, without the slow
-# gamma tests
-err=0
-
-echo >> pngtest-log.txt
-echo "============ pngvalid-simple.sh ==============" >> pngtest-log.txt
-echo "Running test-pngvalid-simple.sh"
-# The options to test are:
-#
-# standard tests with and without progressive reading and interlace
-# size images with and without progressive reading
-# transform tests (standard, non-interlaced only)
-#
-for opts in "--standard" "--standard --progressive-read" \
-   "--standard --interlace" "--standard --progressive-read --interlace" \
-   "--size" "--size --progressive-read" \
-   "--transform"
-do
-   if ./pngvalid "$@" $opts >> pngtest-log.txt 2>&1
-   then
-      echo "  PASS: pngvalid" "$@" $opts
-   else
-      echo "  FAIL: pngvalid" "$@" $opts
-      err=1
-   fi
-done
-
-exit $err

contrib/libtests/timepng.c

@@ -1,8 +1,8 @@
 /* timepng.c
  *
- * Copyright (c) 2012 John Cunningham Bowler
+ * Copyright (c) 2013 John Cunningham Bowler
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.0 [February 14, 2013]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
@@ -22,7 +22,7 @@
 
 #include <time.h>
 
-#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H)
+#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H)
 #  include <config.h>
 #endif
 

contrib/pngminim/decoder/pngusr.dfa

@@ -1,6 +1,6 @@
 # pngminim/decoder/pngusr.dfa
 #
-# Copyright (c) 2010-2011 Glenn Randers-Pehrson
+# Copyright (c) 2010-2013 Glenn Randers-Pehrson
 #
 # This code is released under the libpng license.
 # For conditions of distribution and use, see the disclaimer

contrib/pngminim/decoder/pngusr.h

@@ -1,6 +1,6 @@
 /* minrdpngconf.h: headers to make a minimal png-read-only library
  *
- * Copyright (c) 2007, 2010-2011 Glenn Randers-Pehrson
+ * Copyright (c) 2007, 2010-2013 Glenn Randers-Pehrson
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer

contrib/pngminim/encoder/README

@@ -1,6 +1,6 @@
 This demonstrates the use of PNG_USER_CONFIG and pngusr.h
 
-The makefile builds a minimal write-only decoder with embedded libpng
+The makefile builds a minimal write-only encoder with embedded libpng
 and zlib.
 
 Specify the location of the zlib source (1.2.1 or later) as ZLIBSRC

contrib/pngminim/encoder/pngusr.dfa

@@ -1,6 +1,6 @@
 # pngminim/encoder/pngusr.dfa
 #
-# Copyright (c) 2010-2011 Glenn Randers-Pehrson
+# Copyright (c) 2010-2013 Glenn Randers-Pehrson
 #
 # This code is released under the libpng license.
 # For conditions of distribution and use, see the disclaimer

contrib/pngminim/encoder/pngusr.h

@@ -1,6 +1,6 @@
 /* minwrpngconf.h: headers to make a minimal png-write-only library
  *
- * Copyright (c) 2007, 2010-2011 Glenn Randers-Pehrson
+ * Copyright (c) 2007, 2010-2013 Glenn Randers-Pehrson
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer

contrib/pngminim/preader/pngusr.dfa

@@ -1,6 +1,6 @@
 # pngminim/preader/pngusr.dfa
 #
-# Copyright (c) 2010-2011 Glenn Randers-Pehrson
+# Copyright (c) 2010-2013 Glenn Randers-Pehrson
 #
 # This code is released under the libpng license.
 # For conditions of distribution and use, see the disclaimer

contrib/pngminim/preader/pngusr.h

@@ -1,6 +1,6 @@
 /* minrdpngconf.h: headers to make a minimal png-read-only library
  *
- * Copyright (c) 2009, 2010-2011 Glenn Randers-Pehrson
+ * Copyright (c) 2009, 2010-2013 Glenn Randers-Pehrson
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer

contrib/tools/checksum-icc.c

@@ -1,8 +1,8 @@
 /* checksum-icc.c
  *
- * Copyright (c) 2012 John Cunningham Bowler
+ * Copyright (c) 2013 John Cunningham Bowler
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.0 [February 14, 2013]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer

contrib/tools/cvtcolor.c

@@ -1,9 +1,9 @@
 /*-
  * convert.c
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.0 [February 14, 2013]
  *
- * COPYRIGHT: Written by John Cunningham Bowler, 2012.
+ * COPYRIGHT: Written by John Cunningham Bowler, 2013.
  * 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.

contrib/tools/intgamma.sh

@@ -2,9 +2,9 @@
 #
 # intgamma.sh
 #
-# Last changed in libpng 1.6.0 [(PENDING RELEASE)]
+# Last changed in libpng 1.6.0 [February 14, 2013]
 #
-# COPYRIGHT: Written by John Cunningham Bowler, 2012.
+# COPYRIGHT: Written by John Cunningham Bowler, 2013.
 # 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.

contrib/tools/makesRGB.c

@@ -1,8 +1,8 @@
 /* makesRGB.c -- build sRGB-to-linear and linear-to-sRGB conversion tables
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.0 [February 14, 2013]
  *
- * COPYRIGHT: Written by John Cunningham Bowler, 2012.
+ * COPYRIGHT: Written by John Cunningham Bowler, 2013.
  * 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.

contrib/tools/sRGB.h

@@ -1,9 +1,9 @@
 /*-
  * sRGB.h
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.0 [February 14, 2013]
  *
- * COPYRIGHT: Written by John Cunningham Bowler, 2012.
+ * COPYRIGHT: Written by John Cunningham Bowler, 2013.
  * 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.

example.c

@@ -2,8 +2,8 @@
 #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 1.6.0 [February 14, 2013]
+ * Maintained 1998-2013 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

libpng-manual.txt

@@ -1,9 +1,9 @@
 libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.6.0beta33 - December 10, 2012
+ libpng version 1.6.1beta02 - February 19, 2013
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
- Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ Copyright (c) 1998-2013 Glenn Randers-Pehrson
 
  This document is released under the libpng license.
  For conditions of distribution and use, see the disclaimer
@@ -11,9 +11,9 @@ libpng-manual.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.6.0beta33 - December 10, 2012
+ libpng versions 0.97, January 1998, through 1.6.1beta02 - February 19, 2013
  Updated and distributed by Glenn Randers-Pehrson
- Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ Copyright (c) 1998-2013 Glenn Randers-Pehrson
 
  libpng 1.0 beta 6  version 0.96 May 28, 1997
  Updated and distributed by Andreas Dilger
@@ -636,7 +636,7 @@ callback function:
 
       /* also ignore unused known chunks: */
       png_set_keep_unknown_chunks(read_ptr, 1, unused_chunks,
-         (int)sizeof(unused_chunks)/5);
+         (int)(sizeof unused_chunks)/5);
     #endif
 
 User limits
@@ -675,9 +675,6 @@ where 0x7fffffffL means unlimited.  You can retrieve this limit with
 
    chunk_cache_max = png_get_chunk_cache_max(png_ptr);
 
-This limit also applies to the number of buffers that can be allocated
-by png_decompress_chunk() while decompressing iTXt, zTXt, and iCCP chunks.
-
 You can also set a limit on the amount of memory that a compressed chunk
 other than IDAT can occupy, with
 
@@ -991,7 +988,7 @@ where row_pointers is an array of pointers to the pixel data for each row:
 If you know your image size and pixel size ahead of time, you can allocate
 row_pointers prior to calling png_read_png() with
 
-   if (height > PNG_UINT_32_MAX/png_sizeof(png_byte))
+   if (height > PNG_UINT_32_MAX/(sizeof (png_byte)))
       png_error (png_ptr,
           "Image is too tall to process in memory");
 
@@ -1000,7 +997,7 @@ row_pointers prior to calling png_read_png() with
           "Image is too wide to process in memory");
 
    row_pointers = png_malloc(png_ptr,
-       height*png_sizeof(png_bytep));
+       height*(sizeof (png_bytep)));
 
    for (int i=0; i<height, i++)
       row_pointers[i]=NULL;  /* security precaution */
@@ -3083,8 +3080,8 @@ tEXt chunk use RFC 1123 format dates (e.g. "22 May 1997 18:07:10 GMT"),
 although this isn't a requirement.  Unlike the tIME chunk, the
 "Creation Time" tEXt chunk is not expected to be automatically changed
 by the software.  To facilitate the use of RFC 1123 dates, a function
-png_convert_to_rfc1123_buffer(buffer, png_timep) is provided to convert
-from PNG time to an RFC 1123 format string.  The caller must provide
+png_convert_to_rfc1123_buffer(png_ptr, buffer, png_timep) is provided to
+convert from PNG time to an RFC 1123 format string.  The caller must provide
 a writeable buffer of at least 29 bytes.
 
 Writing unknown chunks
@@ -3984,6 +3981,15 @@ compiler documentation for more details.  For an alternative approach, you
 may wish to use the "cexcept" facility (see http://cexcept.sourceforge.net),
 which is illustrated in pngvalid.c and in contrib/visupng.
 
+Beginning in libpng-1.4.0, the png_set_benign_errors() API became available.
+You can use this to handle certain errors (normally handled as errors)
+as warnings.
+
+    png_set_benign_errors (png_ptr, int allowed);
+
+    allowed: 0: (default) treat png_benign_error() an error.
+             1: treat png_benign_error() as a warning.
+
 Custom chunks
 
 If you need to read or write custom chunks, you may need to get deeper
@@ -4593,6 +4599,18 @@ If the error is ignored, or if png_benign_error() treats it as a warning,
 any invalid pixels are decoded as opaque black by the decoder and written
 as-is by the encoder.
 
+Retrieving the maximum palette index found was added at libpng-1.5.15.
+This statement must appear after png_read_png() or png_read_image() while
+reading, and after png_write_png() or png_write_image() while writing.
+
+   int max_palette = png_get_palette_max(png_ptr, info_ptr);
+
+This will return the maximum palette index found in the image, or "-1" if
+the palette was not checked, or "0" if no palette was found.  Note that this
+does not account for any palette index used by ancillary chunks such as the
+bKGD chunk; you must check those separately to determine the maximum
+palette index actually used.
+
 A. Changes that affect users of libpng
 
 There are no substantial API changes between the non-deprecated parts of
@@ -4930,10 +4948,12 @@ The following API are now DEPRECATED:
    png_info_init_3()
    png_convert_to_rfc1123() which has been replaced
      with png_convert_to_rfc1123_buffer()
+   png_data_freer()
    png_malloc_default()
    png_free_default()
+   png_reset_zstream()
 
-The following has been removed:
+The following have been removed:
    png_get_io_chunk_name(), which has been replaced
      with png_get_io_chunk_type().  The new
      function returns a 32-bit integer instead of
@@ -4965,6 +4985,10 @@ This adds more correct option control of the unknown handling, corrects
 a pre-existing bug where the per-chunk 'keep' setting is ignored, and makes
 it possible to skip IDAT chunks in the sequential reader.
 
+The machine-generated configure files are no longer included in branches
+libpng16 and later of the GIT repository.  They continue to be included
+in the tarball releases, however.
+
 XIII.  Detecting libpng
 
 The png_get_io_ptr() function has been present since libpng-0.88, has never
@@ -5110,7 +5134,8 @@ left parenthesis that follows it:
        y[i] = a(x) + (int)b;
 
 We prefer #ifdef and #ifndef to #if defined() and #if !defined()
-when there is only one macro being tested.
+when there is only one macro being tested.  We always use parentheses
+with "defined".
 
 We prefer to express integers that are used as bit masks in hex format,
 with an even number of lower-case hex digits (e.g., 0x00, 0xff, 0x0100).
@@ -5126,13 +5151,13 @@ Other rules can be inferred by inspecting the libpng source.
 
 XVI. Y2K Compliance in libpng
 
-December 10, 2012
+February 19, 2013
 
 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 1.6.0beta33 are Y2K compliant.  It is my belief that earlier
+upward through 1.6.1beta02 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has two year fields.  One is a 2-byte unsigned integer

libpngpf.3

@@ -1,21 +1,11 @@
-.TH LIBPNGPF 3 "December 10, 2012"
+.TH LIBPNGPF 3 "February 19, 2013"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.6.0beta33
+libpng \- Portable Network Graphics (PNG) Reference Library 1.6.1beta02
 (private functions)
 .SH SYNOPSIS
 \fB#include \fI"pngpriv.h"
 
-\fI\fB
-
-\fBAs of libpng version \fP\fI1.5.1\fP\fB, this section is no longer \fP\fImaintained\fP\fB, now \fIthat
-
-\fBthe private function prototypes are hidden in pngpriv.h and not \fIaccessible
-
-\fBto applications. Look in pngpriv.h for the prototypes and a short \fIdescription
-
-\fBof each \fIfunction.
-
-\fI\fB
+\fBAs of libpng version \fP\fI1.5.1\fP\fB, this section is no longer \fP\fImaintained\fP\fB, now that the private function prototypes are hidden in pngpriv.h and not accessible to applications. Look in pngpriv.h for the prototypes and a short description of each \fIfunction.
 
 .SH DESCRIPTION
 The functions previously listed here are used privately by libpng and are not

png.5

@@ -1,4 +1,4 @@
-.TH PNG 5 "December 10, 2012"
+.TH PNG 5 "February 19, 2013"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION

png.c

@@ -1,8 +1,8 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
+ * Copyright (c) 1998-2013 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.)
  *
@@ -14,7 +14,7 @@
 #include "pngpriv.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_0beta33 Your_png_h_is_not_version_1_6_0beta33;
+typedef png_libpng_version_1_6_1beta02 Your_png_h_is_not_version_1_6_1beta02;
 
 /* Tells libpng that we have already handled the first "num_bytes" bytes
  * of the PNG file signature.  If the PNG data is embedded into another
@@ -545,7 +545,7 @@ png_free_data(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 mask,
       {
          if (info_ptr->splt_palettes_num)
          {
-            unsigned int i;
+            int i;
             for (i = 0; i < info_ptr->splt_palettes_num; i++)
                png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, (int)i);
 
@@ -572,7 +572,7 @@ png_free_data(png_const_structrp png_ptr, png_inforp info_ptr, png_uint_32 mask,
 
       else
       {
-         unsigned int i;
+         int i;
 
          if (info_ptr->unknown_chunks_num)
          {
@@ -768,14 +768,14 @@ png_get_copyright(png_const_structrp png_ptr)
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.6.0beta33 - December 10, 2012" PNG_STRING_NEWLINE \
-     "Copyright (c) 1998-2012 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
+     "libpng version 1.6.1beta02 - February 19, 2013" PNG_STRING_NEWLINE \
+     "Copyright (c) 1998-2013 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE;
 #  else
-      return "libpng version 1.6.0beta33 - December 10, 2012\
-      Copyright (c) 1998-2012 Glenn Randers-Pehrson\
+      return "libpng version 1.6.1beta02 - February 19, 2013\
+      Copyright (c) 1998-2013 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
 #  endif
@@ -1407,8 +1407,10 @@ png_XYZ_from_xy(png_XYZ *XYZ, const png_xy *xy)
       red_inverse))
       return 1;
 
-   if (!png_muldiv(&XYZ->green_X, xy->greenx, PNG_FP_1, green_inverse)) return 1;
-   if (!png_muldiv(&XYZ->green_Y, xy->greeny, PNG_FP_1, green_inverse)) return 1;
+   if (!png_muldiv(&XYZ->green_X, xy->greenx, PNG_FP_1, green_inverse))
+      return 1;
+   if (!png_muldiv(&XYZ->green_Y, xy->greeny, PNG_FP_1, green_inverse))
+      return 1;
    if (!png_muldiv(&XYZ->green_Z, PNG_FP_1 - xy->greenx - xy->greeny, PNG_FP_1,
       green_inverse))
       return 1;
@@ -1647,7 +1649,7 @@ png_colorspace_set_endpoints(png_const_structrp png_ptr,
    return 0; /* failed */
 }
 
-#if defined PNG_sRGB_SUPPORTED || defined PNG_iCCP_SUPPORTED
+#if defined(PNG_sRGB_SUPPORTED) || defined(PNG_iCCP_SUPPORTED)
 /* Error message generation */
 static char
 png_icc_tag_char(png_uint_32 byte)
@@ -2127,7 +2129,7 @@ static const struct
       PNG_MD5(0x00000000, 0x00000000, 0x00000000, 0x00000000), 0, 1/*broken*/,
       "1998/02/09 06:49:00", 3144, "HP-Microsoft sRGB v2 perceptual")
 
-   PNG_ICC_CHECKSUM(0x0398f3fcUL, 0xf29e526dUL,
+   PNG_ICC_CHECKSUM(0x0398f3fc, 0xf29e526d,
       PNG_MD5(0x00000000, 0x00000000, 0x00000000, 0x00000000), 1, 1/*broken*/,
       "1998/02/09 06:49:00", 3144, "HP-Microsoft sRGB v2 media-relative")
 };
@@ -3090,7 +3092,7 @@ png_fixed(png_const_structrp png_ptr, double fp, png_const_charp text)
 #endif
 
 #if defined(PNG_READ_GAMMA_SUPPORTED) || \
-    defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG__READ_pHYs_SUPPORTED)
+    defined(PNG_INCH_CONVERSIONS_SUPPORTED) || defined(PNG_READ_pHYs_SUPPORTED)
 /* muldiv functions */
 /* This API takes signed arguments and rounds the result to the nearest
  * integer (or, for a fixed point number - the standard argument - to
@@ -4011,8 +4013,8 @@ png_build_gamma_table(png_structrp png_ptr, int bit_depth)
 #endif /* READ_GAMMA */
 
 /* sRGB support */
-#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\
-   defined PNG_SIMPLIFIED_WRITE_SUPPORTED
+#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\
+   defined(PNG_SIMPLIFIED_WRITE_SUPPORTED)
 /* sRGB conversion tables; these are machine generated with the code in
  * contrib/tools/makesRGB.c.  The actual sRGB transfer curve defined in the
  * specification (see the article at http://en.wikipedia.org/wiki/SRGB)
@@ -4180,8 +4182,8 @@ const png_byte png_sRGB_delta[512] =
 #endif /* SIMPLIFIED READ/WRITE sRGB support */
 
 /* SIMPLIFIED READ/WRITE SUPPORT */
-#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\
-   defined PNG_SIMPLIFIED_WRITE_SUPPORTED
+#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\
+   defined(PNG_SIMPLIFIED_WRITE_SUPPORTED)
 static int
 png_image_free_function(png_voidp argument)
 {

png.h

@@ -1,8 +1,8 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.6.0beta33 - December 10, 2012
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * libpng version 1.6.1beta02 - February 19, 2013
+ * Copyright (c) 1998-2013 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.)
  *
@@ -11,7 +11,7 @@
  * Authors and maintainers:
  *   libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *   libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *   libpng versions 0.97, January 1998, through 1.6.0beta33 - December 10, 2012: Glenn
+ *   libpng versions 0.97, January 1998, through 1.6.1beta02 - February 19, 2013: Glenn
  *   See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -166,7 +166,10 @@
  *    1.5.7beta01-05          15    10507  15.so.15.7[.0]
  *    1.5.7rc01-03            15    10507  15.so.15.7[.0]
  *    1.5.7                   15    10507  15.so.15.7[.0]
- *    1.6.0beta01-32          16    10600  16.so.16.0[.0]
+ *    1.6.0beta01-40          16    10600  16.so.16.0[.0]
+ *    1.6.0rc01-08            16    10600  16.so.16.0[.0]
+ *    1.6.0                   16    10600  16.so.16.0[.0]
+ *    1.6.1beta01-02          16    10601  16.so.16.1[.0]
  *
  *   Henceforth the source version will match the shared-library major
  *   and minor numbers; the shared-library major version number will be
@@ -198,8 +201,8 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.6.0beta33, December 10, 2012, are
- * Copyright (c) 2004, 2006-2012 Glenn Randers-Pehrson, and are
+ * libpng versions 1.2.6, August 15, 2004, through 1.6.1beta02, February 19, 2013, are
+ * Copyright (c) 2004, 2006-2013 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:
  *
@@ -310,13 +313,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    December 10, 2012
+ *    February 19, 2013
  *
  *    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 1.6.0beta33 are Y2K compliant.  It is my belief that
+ *    upward through 1.6.1beta02 are Y2K compliant.  It is my belief that
  *    earlier versions were also Y2K compliant.
  *
  *    Libpng only has two year fields.  One is a 2-byte unsigned integer
@@ -376,9 +379,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.6.0beta33"
+#define PNG_LIBPNG_VER_STRING "1.6.1beta02"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.6.0beta33 - December 10, 2012\n"
+     " libpng version 1.6.1beta02 - February 19, 2013\n"
 
 #define PNG_LIBPNG_VER_SONUM   16
 #define PNG_LIBPNG_VER_DLLNUM  16
@@ -386,13 +389,13 @@
 /* These should match the first 3 components of PNG_LIBPNG_VER_STRING: */
 #define PNG_LIBPNG_VER_MAJOR   1
 #define PNG_LIBPNG_VER_MINOR   6
-#define PNG_LIBPNG_VER_RELEASE 0
+#define PNG_LIBPNG_VER_RELEASE 1
 
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero:
  */
 
-#define PNG_LIBPNG_VER_BUILD  33
+#define PNG_LIBPNG_VER_BUILD  02
 
 /* Release Status */
 #define PNG_LIBPNG_BUILD_ALPHA    1
@@ -417,7 +420,7 @@
  * version 1.0.0 was mis-numbered 100 instead of 10000).  From
  * version 1.0.1 it's    xxyyzz, where x=major, y=minor, z=release
  */
-#define PNG_LIBPNG_VER 10600 /* 1.6.0 */
+#define PNG_LIBPNG_VER 10601 /* 1.6.1 */
 
 /* Library configuration: these options cannot be changed after
  * the library has been built.
@@ -522,7 +525,7 @@ extern "C" {
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef char* png_libpng_version_1_6_0beta33;
+typedef char* png_libpng_version_1_6_1beta02;
 
 /* Basic control structions.  Read libpng-manual.txt or libpng.3 for more info.
  *
@@ -2182,7 +2185,7 @@ PNG_FIXED_EXPORT(140, void, png_set_gAMA_fixed, (png_const_structrp png_ptr,
 
 #ifdef PNG_hIST_SUPPORTED
 PNG_EXPORT(141, png_uint_32, png_get_hIST, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, png_uint_16p *hist));
+    png_inforp info_ptr, png_uint_16p *hist));
 #endif
 
 #ifdef PNG_hIST_SUPPORTED
@@ -2214,7 +2217,7 @@ PNG_EXPORT(146, void, png_set_oFFs, (png_const_structrp png_ptr,
 
 #ifdef PNG_pCAL_SUPPORTED
 PNG_EXPORT(147, png_uint_32, png_get_pCAL, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, png_charp *purpose, png_int_32 *X0,
+    png_inforp info_ptr, png_charp *purpose, png_int_32 *X0,
     png_int_32 *X1, int *type, int *nparams, png_charp *units,
     png_charpp *params));
 #endif
@@ -2237,7 +2240,7 @@ PNG_EXPORT(150, void, png_set_pHYs, (png_const_structrp png_ptr,
 #endif
 
 PNG_EXPORT(151, png_uint_32, png_get_PLTE, (png_const_structrp png_ptr,
-   png_const_inforp info_ptr, png_colorp *palette, int *num_palette));
+   png_inforp info_ptr, png_colorp *palette, int *num_palette));
 
 PNG_EXPORT(152, void, png_set_PLTE, (png_structrp png_ptr,
     png_inforp info_ptr, png_const_colorp palette, int num_palette));
@@ -2266,7 +2269,7 @@ PNG_EXPORT(157, void, png_set_sRGB_gAMA_and_cHRM, (png_const_structrp png_ptr,
 
 #ifdef PNG_iCCP_SUPPORTED
 PNG_EXPORT(158, png_uint_32, png_get_iCCP, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, png_charpp name, int *compression_type,
+    png_inforp info_ptr, png_charpp name, int *compression_type,
     png_bytepp profile, png_uint_32 *proflen));
 #endif
 
@@ -2277,8 +2280,8 @@ PNG_EXPORT(159, void, png_set_iCCP, (png_const_structrp png_ptr,
 #endif
 
 #ifdef PNG_sPLT_SUPPORTED
-PNG_EXPORT(160, png_uint_32, png_get_sPLT, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, png_sPLT_tpp entries));
+PNG_EXPORT(160, int, png_get_sPLT, (png_const_structrp png_ptr,
+    png_inforp info_ptr, png_sPLT_tpp entries));
 #endif
 
 #ifdef PNG_sPLT_SUPPORTED
@@ -2288,8 +2291,8 @@ PNG_EXPORT(161, void, png_set_sPLT, (png_const_structrp png_ptr,
 
 #ifdef PNG_TEXT_SUPPORTED
 /* png_get_text also returns the number of text chunks in *num_text */
-PNG_EXPORT(162, png_uint_32, png_get_text, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, png_textp *text_ptr, int *num_text));
+PNG_EXPORT(162, int, png_get_text, (png_const_structrp png_ptr,
+    png_inforp info_ptr, png_textp *text_ptr, int *num_text));
 #endif
 
 /* Note while png_set_text() will accept a structure whose text,
@@ -2329,8 +2332,8 @@ PNG_EXPORT(167, void, png_set_tRNS, (png_structrp png_ptr,
 #ifdef PNG_sCAL_SUPPORTED
 PNG_FP_EXPORT(168, png_uint_32, png_get_sCAL, (png_const_structrp png_ptr,
     png_const_inforp info_ptr, int *unit, double *width, double *height))
-#if (defined PNG_FLOATING_ARITHMETIC_SUPPORTED) || \
-   (defined PNG_FLOATING_POINT_SUPPORTED)
+#if defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) || \
+   defined(PNG_FLOATING_POINT_SUPPORTED)
 /* NOTE: this API is currently implemented using floating point arithmetic,
  * consequently it can only be used on systems with floating point support.
  * In any case the range of values supported by png_fixed_point is small and it
@@ -2472,7 +2475,7 @@ PNG_EXPORT(175, void, png_set_unknown_chunk_location,
     (png_const_structrp png_ptr, png_inforp info_ptr, int chunk, int location));
 
 PNG_EXPORT(176, int, png_get_unknown_chunks, (png_const_structrp png_ptr,
-    png_const_inforp info_ptr, png_unknown_chunkpp entries));
+    png_inforp info_ptr, png_unknown_chunkpp entries));
 #endif
 
 /* Png_free_data() will turn off the "valid" flag for anything it frees.
@@ -3198,14 +3201,17 @@ PNG_EXPORT(240, int, png_image_write_to_stdio, (png_imagep image, FILE *file,
  *  END OF SIMPLIFIED API
  ******************************************************************************/
 
-#if defined(PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED) || \
-    defined(PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED)
+#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
 PNG_EXPORT(242, void, png_set_check_for_invalid_index,
     (png_structrp png_ptr, int allowed));
-#endif
+#  ifdef PNG_GET_PALETTE_MAX_SUPPORTED
+PNG_EXPORT(243, int, png_get_palette_max, (png_const_structp png_ptr,
+    png_const_infop info_ptr));
+#  endif
+#endif /* CHECK_FOR_INVALID_INDEX */
 
 /* Maintainer: Put new public prototypes here ^, in libpng.3, and project
- * defs
+ * defs, scripts/pnglibconf.h, and scripts/pnglibconf.h.prebuilt
  */
 
 /* The last ordinal number (this is the *last* one already used; the next
@@ -3213,7 +3219,7 @@ PNG_EXPORT(242, void, png_set_check_for_invalid_index,
  * scripts/symbols.def as well.
  */
 #ifdef PNG_EXPORT_LAST_ORDINAL
-  PNG_EXPORT_LAST_ORDINAL(242);
+  PNG_EXPORT_LAST_ORDINAL(243);
 #endif
 
 #ifdef __cplusplus

pngconf.h

@@ -1,9 +1,9 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.6.0beta33 - December 10, 2012
+ * libpng version 1.6.1beta02 - February 19, 2013
  *
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2013 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.)
  *
@@ -198,18 +198,16 @@
  * ==========================
  * This code is used at build time to find PNG_IMPEXP, the API settings
  * and PNG_EXPORT_TYPE(), it may also set a macro to indicate the DLL
- * import processing is possible.  On Windows/x86 systems it also sets
+ * import processing is possible.  On Windows systems it also sets
  * compiler-specific macros to the values required to change the calling
  * conventions of the various functions.
  */
-#if ( defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
-      defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__) ) &&\
-    ( defined(_X86_) || defined(_X64_) || defined(_M_IX86) ||\
-      defined(_M_X64) || defined(_M_IA64) )
-  /* Windows system (DOS doesn't support DLLs) running on x86/x64.  Includes
-   * builds under Cygwin or MinGW.  Also includes Watcom builds but these need
-   * special treatment because they are not compatible with GCC or Visual C
-   * because of different calling conventions.
+#if defined(_Windows) || defined(_WINDOWS) || defined(WIN32) ||\
+    defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
+  /* Windows system (DOS doesn't support DLLs).  Includes builds under Cygwin or
+   * MinGW on any architecture currently supported by Windows.  Also includes
+   * Watcom builds but these need special treatment because they are not
+   * compatible with GCC or Visual C because of different calling conventions.
    */
 #  if PNG_API_RULE == 2
     /* If this line results in an error, either because __watcall is not
@@ -220,9 +218,12 @@
 #    define PNGCAPI __watcall
 #  endif
 
-#  if defined(__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
+#  if defined(__GNUC__) || (defined(_MSC_VER) && (_MSC_VER >= 800))
 #    define PNGCAPI __cdecl
 #    if PNG_API_RULE == 1
+       /* If this line results in an error __stdcall is not understood and
+        * PNG_API_RULE should not have been set to '1'.
+        */
 #      define PNGAPI __stdcall
 #    endif
 #  else
@@ -260,7 +261,7 @@
 #    endif
 #  endif /* compiler */
 
-#else /* !Windows/x86 */
+#else /* !Windows */
 #  if (defined(__IBMC__) || defined(__IBMCPP__)) && defined(__OS2__)
 #    define PNGAPI _System
 #  else /* !Windows/x86 && !OS/2 */

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 1.6.1 [(PENDING RELEASE)]
+ * Copyright (c) 1998-2013 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.)
  *
@@ -516,7 +516,7 @@ png_chunk_report(png_const_structrp png_ptr, png_const_charp message, int error)
    /* This is always supported, but for just read or just write it
     * unconditionally does the right thing.
     */
-#  if (defined PNG_READ_SUPPORTED) && (defined PNG_WRITE_SUPPORTED)
+#  if defined(PNG_READ_SUPPORTED) && defined(PNG_WRITE_SUPPORTED)
       if (png_ptr->mode & PNG_IS_READ_STRUCT)
 #  endif
 
@@ -530,7 +530,7 @@ png_chunk_report(png_const_structrp png_ptr, png_const_charp message, int error)
       }
 #  endif
 
-#  if (defined PNG_READ_SUPPORTED) && (defined PNG_WRITE_SUPPORTED)
+#  if defined(PNG_READ_SUPPORTED) && defined(PNG_WRITE_SUPPORTED)
       else if (!(png_ptr->mode & PNG_IS_READ_STRUCT))
 #  endif
 
@@ -844,8 +844,8 @@ png_set_strip_error_numbers(png_structrp png_ptr, png_uint_32 strip_mode)
 }
 #endif
 
-#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\
-   defined PNG_SIMPLIFIED_WRITE_SUPPORTED
+#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:

pngget.c

@@ -1,8 +1,8 @@
 
 /* pngget.c - retrieval of values from info struct
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
+ * Copyright (c) 1998-2013 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.)
  *
@@ -552,14 +552,14 @@ png_get_cHRM_XYZ(png_const_structrp png_ptr, png_const_inforp info_ptr,
          *green_Z = png_float(png_ptr,
             info_ptr->colorspace.end_points_XYZ.green_Z, "cHRM green Z");
       if (blue_X != NULL)
-         *blue_X = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.blue_X,
-            "cHRM blue X");
+         *blue_X = png_float(png_ptr,
+            info_ptr->colorspace.end_points_XYZ.blue_X, "cHRM blue X");
       if (blue_Y != NULL)
-         *blue_Y = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.blue_Y,
-            "cHRM blue Y");
+         *blue_Y = png_float(png_ptr,
+            info_ptr->colorspace.end_points_XYZ.blue_Y, "cHRM blue Y");
       if (blue_Z != NULL)
-         *blue_Z = png_float(png_ptr, info_ptr->colorspace.end_points_XYZ.blue_Z,
-            "cHRM blue Z");
+         *blue_Z = png_float(png_ptr,
+            info_ptr->colorspace.end_points_XYZ.blue_Z, "cHRM blue Z");
       return (PNG_INFO_cHRM);
    }
 
@@ -701,7 +701,7 @@ png_get_sRGB(png_const_structrp png_ptr, png_const_inforp info_ptr,
 
 #ifdef PNG_iCCP_SUPPORTED
 png_uint_32 PNGAPI
-png_get_iCCP(png_const_structrp png_ptr, png_const_inforp info_ptr,
+png_get_iCCP(png_const_structrp png_ptr, png_inforp info_ptr,
     png_charpp name, int *compression_type,
     png_bytepp profile, png_uint_32 *proflen)
 {
@@ -726,14 +726,14 @@ png_get_iCCP(png_const_structrp png_ptr, png_const_inforp info_ptr,
 #endif
 
 #ifdef PNG_sPLT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_sPLT(png_const_structrp png_ptr, png_const_inforp info_ptr,
+int PNGAPI
+png_get_sPLT(png_const_structrp png_ptr, png_inforp info_ptr,
     png_sPLT_tpp spalettes)
 {
    if (png_ptr != NULL && info_ptr != NULL && spalettes != NULL)
    {
       *spalettes = info_ptr->splt_palettes;
-      return ((png_uint_32)info_ptr->splt_palettes_num);
+      return info_ptr->splt_palettes_num;
    }
 
    return (0);
@@ -742,7 +742,7 @@ png_get_sPLT(png_const_structrp png_ptr, png_const_inforp info_ptr,
 
 #ifdef PNG_hIST_SUPPORTED
 png_uint_32 PNGAPI
-png_get_hIST(png_const_structrp png_ptr, png_const_inforp info_ptr,
+png_get_hIST(png_const_structrp png_ptr, png_inforp info_ptr,
     png_uint_16p *hist)
 {
    png_debug1(1, "in %s retrieval function", "hIST");
@@ -818,7 +818,7 @@ png_get_oFFs(png_const_structrp png_ptr, png_const_inforp info_ptr,
 
 #ifdef PNG_pCAL_SUPPORTED
 png_uint_32 PNGAPI
-png_get_pCAL(png_const_structrp png_ptr, png_const_inforp info_ptr,
+png_get_pCAL(png_const_structrp png_ptr, png_inforp info_ptr,
     png_charp *purpose, png_int_32 *X0, png_int_32 *X1, int *type, int *nparams,
     png_charp *units, png_charpp *params)
 {
@@ -844,8 +844,8 @@ png_get_pCAL(png_const_structrp png_ptr, png_const_inforp info_ptr,
 
 #ifdef PNG_sCAL_SUPPORTED
 #  ifdef PNG_FIXED_POINT_SUPPORTED
-#    if (defined PNG_FLOATING_ARITHMETIC_SUPPORTED) || \
-         (defined PNG_FLOATING_POINT_SUPPORTED)
+#    if defined(PNG_FLOATING_ARITHMETIC_SUPPORTED) || \
+         defined(PNG_FLOATING_POINT_SUPPORTED)
 png_uint_32 PNGAPI
 png_get_sCAL_fixed(png_const_structrp png_ptr, png_const_inforp info_ptr,
     int *unit, png_fixed_point *width, png_fixed_point *height)
@@ -938,7 +938,7 @@ png_get_pHYs(png_const_structrp png_ptr, png_const_inforp info_ptr,
 #endif /* pHYs */
 
 png_uint_32 PNGAPI
-png_get_PLTE(png_const_structrp png_ptr, png_const_inforp info_ptr,
+png_get_PLTE(png_const_structrp png_ptr, png_inforp info_ptr,
     png_colorp *palette, int *num_palette)
 {
    png_debug1(1, "in %s retrieval function", "PLTE");
@@ -974,8 +974,8 @@ png_get_sBIT(png_const_structrp png_ptr, png_inforp info_ptr,
 #endif
 
 #ifdef PNG_TEXT_SUPPORTED
-png_uint_32 PNGAPI
-png_get_text(png_const_structrp png_ptr, png_const_inforp info_ptr,
+int PNGAPI
+png_get_text(png_const_structrp png_ptr, png_inforp info_ptr,
     png_textp *text_ptr, int *num_text)
 {
    if (png_ptr != NULL && info_ptr != NULL && info_ptr->num_text > 0)
@@ -989,7 +989,7 @@ png_get_text(png_const_structrp png_ptr, png_const_inforp info_ptr,
       if (num_text != NULL)
          *num_text = info_ptr->num_text;
 
-      return ((png_uint_32)info_ptr->num_text);
+      return info_ptr->num_text;
    }
 
    if (num_text != NULL)
@@ -1064,7 +1064,7 @@ png_get_tRNS(png_const_structrp png_ptr, png_inforp info_ptr,
 
 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
 int PNGAPI
-png_get_unknown_chunks(png_const_structrp png_ptr, png_const_inforp info_ptr,
+png_get_unknown_chunks(png_const_structrp png_ptr, png_inforp info_ptr,
     png_unknown_chunkpp unknowns)
 {
    if (png_ptr != NULL && info_ptr != NULL && unknowns != NULL)
@@ -1161,4 +1161,17 @@ png_get_io_chunk_type (png_const_structrp png_ptr)
 }
 #endif /* ?PNG_IO_STATE_SUPPORTED */
 
+#ifdef PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
+#  ifdef PNG_GET_PALETTE_MAX_SUPPORTED
+int PNGAPI
+png_get_palette_max(png_const_structp png_ptr, png_const_infop info_ptr)
+{
+   if (png_ptr != NULL && info_ptr != NULL)
+      return png_ptr->num_palette_max;
+
+   return (-1);
+}
+#  endif
+#endif
+
 #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */

pnginfo.h

@@ -1,11 +1,11 @@
 
 /* pnginfo.h - header file for PNG reference library
  *
- * Copyright (c) 1998-2011 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2013 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]
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
@@ -88,7 +88,7 @@ struct png_info_def
     * and initialize the appropriate fields below.
     */
 
-#if defined PNG_COLORSPACE_SUPPORTED || defined PNG_GAMMA_SUPPORTED
+#if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED)
    /* png_colorspace only contains 'flags' if neither GAMMA or COLORSPACE are
     * defined.  When COLORSPACE is switched on all the colorspace-defining
     * chunks should be enabled, when GAMMA is switched on all the gamma-defining
@@ -223,13 +223,17 @@ defined(PNG_READ_BACKGROUND_SUPPORTED)
 #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
    /* Storage for unknown chunks that the library doesn't recognize. */
    png_unknown_chunkp unknown_chunks;
-   unsigned int unknown_chunks_num;
+
+   /* The type of this field is limited by the type of 
+    * png_struct::user_chunk_cache_max, else overflow can occur.
+    */
+   int                unknown_chunks_num;
 #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;
+   int         splt_palettes_num; /* Match type returned by png_get API */
 #endif
 
 #ifdef PNG_sCAL_SUPPORTED

pngmem.c

@@ -1,8 +1,8 @@
 
 /* pngmem.c - stub functions for memory allocation
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Copyright (c) 1998-2013 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.)
  *
@@ -76,7 +76,7 @@ png_malloc_base,(png_const_structrp png_ptr, png_alloc_size_t size),
 #ifdef PNG_USER_MEM_SUPPORTED
    PNG_UNUSED(png_ptr)
 #endif
-   if (size > 0 && size <= ~(size_t)0
+   if (size > 0 && size <= PNG_SIZE_MAX
 #     ifdef PNG_MAX_MALLOC_64K
          && size <= 65536U
 #     endif
@@ -95,6 +95,68 @@ png_malloc_base,(png_const_structrp png_ptr, png_alloc_size_t size),
       return NULL;
 }
 
+/* This is really here only to work round a spurious warning in GCC 4.6 and 4.7
+ * that arises because of the checks in png_realloc_array that are repeated in
+ * png_malloc_array.
+ */
+static png_voidp
+png_malloc_array_checked(png_const_structrp png_ptr, int nelements,
+   size_t element_size)
+{
+   png_alloc_size_t req = nelements; /* known to be > 0 */
+
+   if (req <= PNG_SIZE_MAX/element_size)
+      return png_malloc_base(png_ptr, req * element_size);
+
+   /* The failure case when the request is too large */
+   return NULL;
+}
+
+PNG_FUNCTION(png_voidp /* PRIVATE */,
+png_malloc_array,(png_const_structrp png_ptr, int nelements,
+   size_t element_size),PNG_ALLOCATED)
+{
+   if (nelements <= 0 || element_size == 0)
+      png_error(png_ptr, "internal error: array alloc");
+
+   return png_malloc_array_checked(png_ptr, nelements, element_size);
+}
+
+PNG_FUNCTION(png_voidp /* PRIVATE */,
+png_realloc_array,(png_const_structrp png_ptr, png_const_voidp old_array,
+   int old_elements, int add_elements, size_t element_size),PNG_ALLOCATED)
+{
+   /* These are internal errors: */
+   if (add_elements <= 0 || element_size == 0 || old_elements < 0 ||
+      (old_array == NULL && old_elements > 0))
+      png_error(png_ptr, "internal error: array realloc");
+
+   /* Check for overflow on the elements count (so the caller does not have to
+    * check.)
+    */
+   if (add_elements <= INT_MAX - old_elements)
+   {
+      png_voidp new_array = png_malloc_array_checked(png_ptr,
+         old_elements+add_elements, element_size);
+
+      if (new_array != NULL)
+      {
+         /* Because png_malloc_array worked the size calculations below cannot
+          * overflow.
+          */
+         if (old_elements > 0)
+            memcpy(new_array, old_array, element_size*(unsigned)old_elements);
+
+         memset((char*)new_array + element_size*(unsigned)old_elements, 0,
+            element_size*(unsigned)add_elements);
+
+         return new_array;
+      }
+   }
+
+   return NULL; /* error */
+}
+
 /* Various functions that have different error handling are derived from this.
  * png_malloc always exists, but if PNG_USER_MEM_SUPPORTED is defined a separate
  * function png_malloc_default is also provided.

pngpread.c

@@ -1,8 +1,8 @@
 
 /* pngpread.c - read a png file in push mode
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Copyright (c) 1998-2013 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.)
  *

pngpriv.h

@@ -2,11 +2,11 @@
 /* pngpriv.h - private declarations for use inside libpng
  *
  * For conditions of distribution and use, see copyright notice in png.h
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2013 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 1.6.0 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
@@ -39,9 +39,11 @@
  */
 #define _POSIX_SOURCE 1 /* Just the POSIX 1003.1 and C89 APIs */
 
+#ifndef PNG_VERSION_INFO_ONLY
 /* Standard library headers not required by png.h: */
-#include <stdlib.h>
-#include <string.h>
+#  include <stdlib.h>
+#  include <string.h>
+#endif
 
 #define PNGLIB_BUILD /*libpng is being built, not used*/
 
@@ -54,7 +56,7 @@
  * configure generated config.h.  Libpng is expected to compile without *any*
  * special build system support on a reasonably ANSI-C compliant system.
  */
-#if (defined HAVE_CONFIG_H) && !(defined PNG_NO_CONFIG_H)
+#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H)
 #  include <config.h>
 
    /* Pick up the definition of 'restrict' from config.h if it was read: */
@@ -71,7 +73,7 @@
 #endif
 
 /* Local renames may change non-exported API functions from png.h */
-#if defined PNG_PREFIX && !defined PNGPREFIX_H
+#if defined(PNG_PREFIX) && !defined(PNGPREFIX_H)
 #  include "pngprefix.h"
 #endif
 
@@ -177,10 +179,12 @@
 #  ifndef PNG_FLOATING_POINT_SUPPORTED
 #     define PNG_FP_EXPORT(ordinal, type, name, args)\
          PNG_INTERNAL_FUNCTION(type, name, args, PNG_EMPTY);
-      typedef struct png_incomplete png_double;
-      typedef png_double*           png_doublep;
-      typedef const png_double*     png_const_doublep;
-      typedef png_double**          png_doublepp;
+#     ifndef PNG_VERSION_INFO_ONLY
+         typedef struct png_incomplete png_double;
+         typedef png_double*           png_doublep;
+         typedef const png_double*     png_const_doublep;
+         typedef png_double**          png_doublepp;
+#     endif
 #  endif
 #endif
 #ifndef PNG_FIXED_EXPORT
@@ -191,8 +195,6 @@
 #endif
 
 #include "png.h"
-#include "pngstruct.h"
-#include "pnginfo.h"
 
 /* pngconf.h does not set PNG_DLL_EXPORT unless it is required, so: */
 #ifndef PNG_DLL_EXPORT
@@ -238,11 +240,6 @@
 #  endif
 #endif
 
-/* This is used for 16 bit gamma tables -- only the top level pointers are
- * const; this could be changed:
- */
-typedef const png_uint_16p * png_const_uint_16pp;
-
 /* Moved to pngpriv.h at libpng-1.5.0 */
 /* NOTE: some of these may have been used in external applications as
  * these definitions were exposed in pngconf.h prior to 1.5.
@@ -331,6 +328,7 @@ typedef const png_uint_16p * png_const_uint_16pp;
 #  define PNGFAPI /* PRIVATE */
 #endif
 
+#ifndef PNG_VERSION_INFO_ONLY
 /* Other defines specific to compilers can go here.  Try to keep
  * them inside an appropriate ifdef/endif pair for portability.
  */
@@ -375,6 +373,7 @@ typedef const png_uint_16p * png_const_uint_16pp;
     defined(_WIN32) || defined(__WIN32__)
 #  include <windows.h>  /* defines _WINDOWS_ macro */
 #endif
+#endif /* PNG_VERSION_INFO_ONLY */
 
 /* Moved here around 1.5.0beta36 from pngconf.h */
 /* Users may want to use these so they are not private.  Any library
@@ -411,7 +410,7 @@ typedef const png_uint_16p * png_const_uint_16pp;
 #if PNG_ALIGN_TYPE == PNG_ALIGN_SIZE
    /* This is used because in some compiler implementations non-aligned
     * structure members are supported, so the offsetof approach below fails.
-    * Set PNG_ALIGN_TO_SIZE=0 for compiler combinations where unaligned access
+    * Set PNG_ALIGN_SIZE=0 for compiler combinations where unaligned access
     * is good for performance.  Do not do this unless you have tested the result
     * and understand it.
     */
@@ -553,26 +552,6 @@ typedef const png_uint_16p * png_const_uint_16pp;
    abs((int)((c1).green) - (int)((c2).green)) + \
    abs((int)((c1).blue) - (int)((c2).blue)))
 
-/* Added to libpng-1.5.7: sRGB conversion tables */
-#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\
-   defined PNG_SIMPLIFIED_WRITE_SUPPORTED
-#ifdef PNG_SIMPLIFIED_READ_SUPPORTED
-PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_table, [256]);
-   /* Convert from an sRGB encoded value 0..255 to a 16-bit linear value,
-    * 0..65535.  This table gives the closest 16-bit answers (no errors).
-    */
-#endif
-
-PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_base, [512]);
-PNG_INTERNAL_DATA(const png_byte, png_sRGB_delta, [512]);
-
-#define PNG_sRGB_FROM_LINEAR(linear) ((png_byte)((png_sRGB_base[(linear)>>15] +\
-   ((((linear)&0x7fff)*png_sRGB_delta[(linear)>>15])>>12)) >> 8))
-   /* Given a value 'linear' in the range 0..255*65535 calculate the 8-bit sRGB
-    * encoded value with maximum error 0.646365.  Note that the input is not a
-    * 16-bit value; it has been multiplied by 255! */
-#endif /* PNG_SIMPLIFIED_READ/WRITE */
-
 /* Added to libpng-1.6.0: scale a 16-bit value in the range 0..65535 to 0..255
  * by dividing by 257 *with rounding*.  This macro is exact for the given range.
  * See the discourse in pngrtran.c png_do_scale_16_to_8.  The values in the
@@ -707,6 +686,39 @@ PNG_INTERNAL_DATA(const png_byte, png_sRGB_delta, [512]);
 #define PNG_GAMMA_MAC_INVERSE 65909
 #define PNG_GAMMA_sRGB_INVERSE 45455
 
+/* Almost everything below is C specific; the #defines above can be used in
+ * non-C code (so long as it is C-preprocessed) the rest of this stuff cannot.
+ */
+#ifndef PNG_VERSION_INFO_ONLY
+
+#include "pngstruct.h"
+#include "pnginfo.h"
+
+/* This is used for 16 bit gamma tables -- only the top level pointers are
+ * const; this could be changed:
+ */
+typedef const png_uint_16p * png_const_uint_16pp;
+
+/* Added to libpng-1.5.7: sRGB conversion tables */
+#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\
+   defined(PNG_SIMPLIFIED_WRITE_SUPPORTED)
+#ifdef PNG_SIMPLIFIED_READ_SUPPORTED
+PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_table, [256]);
+   /* Convert from an sRGB encoded value 0..255 to a 16-bit linear value,
+    * 0..65535.  This table gives the closest 16-bit answers (no errors).
+    */
+#endif
+
+PNG_INTERNAL_DATA(const png_uint_16, png_sRGB_base, [512]);
+PNG_INTERNAL_DATA(const png_byte, png_sRGB_delta, [512]);
+
+#define PNG_sRGB_FROM_LINEAR(linear) ((png_byte)((png_sRGB_base[(linear)>>15] +\
+   ((((linear)&0x7fff)*png_sRGB_delta[(linear)>>15])>>12)) >> 8))
+   /* Given a value 'linear' in the range 0..255*65535 calculate the 8-bit sRGB
+    * encoded value with maximum error 0.646365.  Note that the input is not a
+    * 16-bit value; it has been multiplied by 255! */
+#endif /* PNG_SIMPLIFIED_READ/WRITE */
+
 
 /* Inhibit C++ name-mangling for libpng functions but not for system calls. */
 #ifdef __cplusplus
@@ -757,6 +769,23 @@ PNG_INTERNAL_FUNCTION(int,png_user_version_check,(png_structrp png_ptr,
 PNG_INTERNAL_FUNCTION(png_voidp,png_malloc_base,(png_const_structrp png_ptr,
    png_alloc_size_t size),PNG_ALLOCATED);
 
+#if defined(PNG_TEXT_SUPPORTED) || defined(PNG_sPLT_SUPPORTED) ||\
+   defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED)
+/* Internal array allocator, outputs no error or warning messages on failure,
+ * just returns NULL.  
+ */
+PNG_INTERNAL_FUNCTION(png_voidp,png_malloc_array,(png_const_structrp png_ptr,
+   int nelements, size_t element_size),PNG_ALLOCATED);
+
+/* The same but an existing array is extended by add_elements.  This function
+ * also memsets the new elements to 0 and copies the old elements.  The old
+ * array is not freed or altered.
+ */
+PNG_INTERNAL_FUNCTION(png_voidp,png_realloc_array,(png_const_structrp png_ptr,
+   png_const_voidp array, int old_elements, int add_elements,
+   size_t element_size),PNG_ALLOCATED);
+#endif /* text, sPLT or unknown chunks */
+
 /* Magic to create a struct when there is no struct to call the user supplied
  * memory allocators.  Because error handling has not been set up the memory
  * handlers can't safely call png_error, but this is an obscure and undocumented
@@ -1807,8 +1836,8 @@ PNG_INTERNAL_FUNCTION(void,png_build_gamma_table,(png_structrp png_ptr,
 #endif
 
 /* SIMPLIFIED READ/WRITE SUPPORT */
-#if defined PNG_SIMPLIFIED_READ_SUPPORTED ||\
-   defined PNG_SIMPLIFIED_WRITE_SUPPORTED
+#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) ||\
+   defined(PNG_SIMPLIFIED_WRITE_SUPPORTED)
 /* The internal structure that png_image::opaque points to. */
 typedef struct png_control
 {
@@ -1862,6 +1891,16 @@ PNG_INTERNAL_FUNCTION(void, png_image_free, (png_imagep image), PNG_EMPTY);
 
 #endif /* SIMPLIFIED READ/WRITE */
 
+#ifdef PNG_FILTER_OPTIMIZATIONS
+PNG_INTERNAL_FUNCTION(void, PNG_FILTER_OPTIMIZATIONS, (png_structp png_ptr,
+    unsigned int bpp), PNG_EMPTY);
+   /* This is the initialization function for hardware specific optimizations,
+    * one implementation (for ARM NEON machines) is contained in
+    * arm/filter_neon.c.  It need not be defined - the generic code will be used
+    * if not.
+    */
+#endif
+
 /* Maintainer: Put new private prototypes here ^ */
 
 #include "pngdebug.h"
@@ -1870,4 +1909,5 @@ PNG_INTERNAL_FUNCTION(void, png_image_free, (png_imagep image), PNG_EMPTY);
 }
 #endif
 
+#endif /* PNG_VERSION_INFO_ONLY */
 #endif /* PNGPRIV_H */

pngread.c

@@ -1,8 +1,8 @@
 
 /* pngread.c - read a PNG file
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
+ * Copyright (c) 1998-2013 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.)
  *
@@ -15,7 +15,7 @@
  */
 
 #include "pngpriv.h"
-#if defined PNG_SIMPLIFIED_READ_SUPPORTED && defined PNG_STDIO_SUPPORTED
+#if defined(PNG_SIMPLIFIED_READ_SUPPORTED) && defined(PNG_STDIO_SUPPORTED)
 #  include <errno.h>
 #endif
 
@@ -877,8 +877,8 @@ png_read_destroy(png_structrp png_ptr)
    png_free(png_ptr, png_ptr->save_buffer);
 #endif
 
-#if (defined PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED) &&\
-   (defined PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
+#if defined(PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED) &&\
+   defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED)
    png_free(png_ptr, png_ptr->unknown_chunk.data);
 #endif
 

pngrio.c

@@ -1,8 +1,8 @@
 
 /* pngrio.c - functions for data input
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Copyright (c) 1998-2013 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.)
  *

pngrtran.c

@@ -1,8 +1,8 @@
 
 /* pngrtran.c - transforms the data in a row for PNG readers
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
+ * Copyright (c) 1998-2013 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.)
  *
@@ -1412,7 +1412,7 @@ png_init_read_transformations(png_structrp png_ptr)
 #endif
 
 #ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
-#if defined PNG_READ_EXPAND_SUPPORTED && defined PNG_READ_BACKGROUND_SUPPORTED
+#if defined(PNG_READ_EXPAND_SUPPORTED) && defined(PNG_READ_BACKGROUND_SUPPORTED)
    /* Detect gray background and attempt to enable optimization for
     * gray --> RGB case.
     *
@@ -2239,8 +2239,8 @@ png_do_read_transformations(png_structrp png_ptr, png_row_infop row_info)
       png_do_gray_to_rgb(row_info, png_ptr->row_buf + 1);
 #endif
 
-#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\
-   (defined PNG_READ_ALPHA_MODE_SUPPORTED)
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
+   defined(PNG_READ_ALPHA_MODE_SUPPORTED)
    if (png_ptr->transformations & PNG_COMPOSE)
       png_do_compose(row_info, png_ptr->row_buf + 1, png_ptr);
 #endif
@@ -2251,8 +2251,8 @@ png_do_read_transformations(png_structrp png_ptr, png_row_infop row_info)
       /* Because RGB_TO_GRAY does the gamma transform. */
       !(png_ptr->transformations & PNG_RGB_TO_GRAY) &&
 #endif
-#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\
-   (defined PNG_READ_ALPHA_MODE_SUPPORTED)
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
+   defined(PNG_READ_ALPHA_MODE_SUPPORTED)
       /* Because PNG_COMPOSE does the gamma transform if there is something to
        * do (if there is an alpha channel or transparency.)
        */
@@ -3518,8 +3518,8 @@ png_build_grayscale_palette(int bit_depth, png_colorp palette)
 
 
 #ifdef PNG_READ_TRANSFORMS_SUPPORTED
-#if (defined PNG_READ_BACKGROUND_SUPPORTED) ||\
-   (defined PNG_READ_ALPHA_MODE_SUPPORTED)
+#if defined(PNG_READ_BACKGROUND_SUPPORTED) ||\
+   defined(PNG_READ_ALPHA_MODE_SUPPORTED)
 /* Replace any alpha or transparency with the supplied background color.
  * "background" is already in the screen gamma, while "background_1" is
  * at a gamma of 1.0.  Paletted files have already been taken care of.

pngrutil.c

@@ -1,8 +1,8 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
+ * Copyright (c) 1998-2013 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.)
  *
@@ -358,8 +358,8 @@ png_inflate_claim(png_structrp png_ptr, png_uint_32 owner, int window_bits)
     * does not take the size of the data as an argument.  Some efficiency could
     * be gained by using this when it is known *if* the zlib stream itself does
     * not record the number; however, this is an illusion: the original writer
-    * follow of the PNG may have selected a lower window size, and we really
-    * must do that because, for systems with with limited capabilities, we
+    * of the PNG may have selected a lower window size, and we really must
+    * follow that because, for systems with with limited capabilities, we
     * would otherwise reject the application's attempts to use a smaller window
     * size (zlib doesn't have an interface to say "this or lower"!).
     *
@@ -3863,68 +3863,16 @@ png_read_filter_row_paeth_multibyte_pixel(png_row_infop row_info, png_bytep row,
    }
 }
 
-#ifdef PNG_ARM_NEON
-
-#ifdef __linux__
-#include <stdio.h>
-#include <elf.h>
-#include <asm/hwcap.h>
-
-static int png_have_hwcap(unsigned cap)
-{
-   FILE *f = fopen("/proc/self/auxv", "r");
-   Elf32_auxv_t aux;
-   int have_cap = 0;
-
-   if (!f)
-      return 0;
-
-   while (fread(&aux, (sizeof aux), 1, f) > 0)
-   {
-      if (aux.a_type == AT_HWCAP &&
-          aux.a_un.a_val & cap)
-      {
-         have_cap = 1;
-         break;
-      }
-   }
-
-   fclose(f);
-
-   return have_cap;
-}
-#endif /* __linux__ */
-
-static void
-png_init_filter_functions_neon(png_structrp pp, unsigned int bpp)
-{
-#ifdef __linux__
-   if (!png_have_hwcap(HWCAP_NEON))
-      return;
-#endif
-
-   pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon;
-
-   if (bpp == 3)
-   {
-      pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_neon;
-      pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_neon;
-      pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
-         png_read_filter_row_paeth3_neon;
-   }
-
-   else if (bpp == 4)
-   {
-      pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_neon;
-      pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_neon;
-      pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
-          png_read_filter_row_paeth4_neon;
-   }
-}
-#endif /* PNG_ARM_NEON */
-
 static void
 png_init_filter_functions(png_structrp pp)
+   /* This function is called once for every PNG image to set the
+    * implementations required to reverse the filtering of PNG rows.  Reversing
+    * the filter is the first transformation performed on the row data.  It is
+    * performed in place, therefore an implementation can be selected based on
+    * the image pixel format.  If the implementation depends on image width then
+    * take care to ensure that it works corretly if the image is interlaced -
+    * interlacing causes the actual row width to vary.
+    */
 {
    unsigned int bpp = (pp->pixel_depth + 7) >> 3;
 
@@ -3938,8 +3886,16 @@ png_init_filter_functions(png_structrp pp)
       pp->read_filter[PNG_FILTER_VALUE_PAETH-1] =
          png_read_filter_row_paeth_multibyte_pixel;
 
-#ifdef PNG_ARM_NEON
-   png_init_filter_functions_neon(pp, bpp);
+#ifdef PNG_FILTER_OPTIMIZATIONS
+   /* To use this define PNG_FILTER_OPTIMIZATIONS as the name of a function to
+    * call to install hardware optimizations for the above functions; simply
+    * replace whatever elements of the pp->read_filter[] array with a hardware
+    * specific (or, for that matter, generic) optimization.
+    *
+    * To see an example of this examine what configure.ac does when
+    * --enable-arm-neon is specified on the command line.
+    */
+   PNG_FILTER_OPTIMIZATIONS(pp, bpp);
 #endif
 }
 
@@ -3947,6 +3903,10 @@ void /* PRIVATE */
 png_read_filter_row(png_structrp pp, png_row_infop row_info, png_bytep row,
    png_const_bytep prev_row, int filter)
 {
+   /* OPTIMIZATION: DO NOT MODIFY THIS FUNCTION, instead #define
+    * PNG_FILTER_OPTIMIZATIONS to a function that overrides the generic
+    * implementations.  See png_init_filter_functions above.
+    */
    if (pp->read_filter[0] == NULL)
       png_init_filter_functions(pp);
    if (filter > PNG_FILTER_VALUE_NONE && filter < PNG_FILTER_VALUE_LAST)

pngset.c

@@ -1,8 +1,8 @@
 
 /* pngset.c - storage of image information into info struct
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
+ * Copyright (c) 1998-2013 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.)
  *
@@ -514,7 +514,7 @@ png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr,
 
    png_debug1(1, "in %s storage function", "PLTE");
 
-   if (png_ptr == NULL || info_ptr == NULL || palette == NULL)
+   if (png_ptr == NULL || info_ptr == NULL)
       return;
 
    if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
@@ -529,6 +529,17 @@ png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr,
       }
    }
 
+   if ((num_palette > 0 && palette == NULL) ||
+      (num_palette == 0
+#        ifdef PNG_MNG_FEATURES_SUPPORTED
+            && (png_ptr->mng_features_permitted & PNG_FLAG_MNG_EMPTY_PLTE) == 0
+#        endif
+      ))
+   {
+      png_chunk_report(png_ptr, "Invalid palette", PNG_CHUNK_ERROR);
+      return;
+   }
+
    /* It may not actually be necessary to set png_ptr->palette here;
     * we do it for backward compatibility with the way the png_handle_tRNS
     * function used to do the allocation.
@@ -545,7 +556,8 @@ png_set_PLTE(png_structrp png_ptr, png_inforp info_ptr,
    png_ptr->palette = png_voidcast(png_colorp, png_calloc(png_ptr,
        PNG_MAX_PALETTE_LENGTH * (sizeof (png_color))));
 
-   memcpy(png_ptr->palette, palette, num_palette * (sizeof (png_color)));
+   if (num_palette > 0)
+      memcpy(png_ptr->palette, palette, num_palette * (sizeof (png_color)));
    info_ptr->palette = png_ptr->palette;
    info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
 
@@ -696,63 +708,62 @@ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
    png_debug1(1, "in %lx storage function", png_ptr == NULL ? "unexpected" :
       (unsigned long)png_ptr->chunk_name);
 
-   if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
+   if (png_ptr == NULL || info_ptr == NULL || num_text <= 0 || text_ptr == NULL)
       return(0);
 
    /* Make sure we have enough space in the "text" array in info_struct
-    * to hold all of the incoming text_ptr objects.
+    * to hold all of the incoming text_ptr objects.  This compare can't overflow
+    * because max_text >= num_text (anyway, subtract of two positive integers
+    * can't overflow in any case.)
     */
-   if (info_ptr->num_text + num_text > info_ptr->max_text)
+   if (num_text > info_ptr->max_text - info_ptr->num_text)
    {
-      int old_max_text = info_ptr->max_text;
       int old_num_text = info_ptr->num_text;
+      int max_text;
+      png_textp new_text = NULL;
 
-      if (info_ptr->text != NULL)
+      /* Calculate an appropriate max_text, checking for overflow. */
+      max_text = old_num_text;
+      if (num_text <= INT_MAX - max_text)
       {
-         png_textp old_text;
+         max_text += num_text;
 
-         info_ptr->max_text = info_ptr->num_text + num_text + 8;
-         old_text = info_ptr->text;
+         /* Round up to a multiple of 8 */
+         if (max_text < INT_MAX-8)
+            max_text = (max_text + 8) & ~0x7;
 
-         info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
-            (png_size_t)(info_ptr->max_text * (sizeof (png_text))));
+         else
+            max_text = INT_MAX;
 
-         if (info_ptr->text == NULL)
-         {
-            /* Restore to previous condition */
-            info_ptr->max_text = old_max_text;
-            info_ptr->text = old_text;
-            return(1);
-         }
-
-         memcpy(info_ptr->text, old_text, (png_size_t)(old_max_text *
-             (sizeof (png_text))));
-         png_free(png_ptr, old_text);
+         /* Now allocate a new array and copy the old members in, this does all
+          * the overflow checks.
+          */
+         new_text = png_voidcast(png_textp,png_realloc_array(png_ptr,
+            info_ptr->text, old_num_text, max_text-old_num_text,
+            sizeof *new_text));
       }
 
-      else
+      if (new_text == NULL)
       {
-         info_ptr->max_text = num_text + 8;
-         info_ptr->num_text = 0;
-         info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
-             (png_size_t)(info_ptr->max_text * (sizeof (png_text))));
-         if (info_ptr->text == NULL)
-         {
-            /* Restore to previous condition */
-            info_ptr->num_text = old_num_text;
-            info_ptr->max_text = old_max_text;
-            return(1);
-         }
-         info_ptr->free_me |= PNG_FREE_TEXT;
+         png_chunk_report(png_ptr, "too many text chunks",
+            PNG_CHUNK_WRITE_ERROR);
+         return 1;
       }
 
-      png_debug1(3, "allocated %d entries for info_ptr->text",
-          info_ptr->max_text);
+      png_free(png_ptr, info_ptr->text);
+
+      info_ptr->text = new_text;
+      info_ptr->free_me |= PNG_FREE_TEXT;
+      info_ptr->max_text = max_text;
+      /* num_text is adjusted below as the entries are copied in */
+
+      png_debug1(3, "allocated %d entries for info_ptr->text", max_text);
    }
+
    for (i = 0; i < num_text; i++)
    {
-      png_size_t text_length, key_len;
-      png_size_t lang_len, lang_key_len;
+      size_t text_length, key_len;
+      size_t lang_len, lang_key_len;
       png_textp textp = &(info_ptr->text[info_ptr->num_text]);
 
       if (text_ptr[i].key == NULL)
@@ -761,7 +772,8 @@ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
       if (text_ptr[i].compression < PNG_TEXT_COMPRESSION_NONE ||
           text_ptr[i].compression >= PNG_TEXT_COMPRESSION_LAST)
       {
-         png_warning(png_ptr, "text compression mode is out of range");
+         png_chunk_report(png_ptr, "text compression mode is out of range",
+            PNG_CHUNK_WRITE_ERROR);
          continue;
       }
 
@@ -792,7 +804,8 @@ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
       }
 #  else /* PNG_iTXt_SUPPORTED */
       {
-         png_warning(png_ptr, "iTXt chunk not supported");
+         png_chunk_report(png_ptr, "iTXt chunk not supported",
+            PNG_CHUNK_WRITE_ERROR);
          continue;
       }
 #  endif
@@ -815,19 +828,22 @@ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
          textp->compression = text_ptr[i].compression;
       }
 
-      textp->key = (png_charp)png_malloc_warn(png_ptr,
-          (png_size_t)
-          (key_len + text_length + lang_len + lang_key_len + 4));
+      textp->key = png_voidcast(png_charp,png_malloc_base(png_ptr,
+          key_len + text_length + lang_len + lang_key_len + 4));
 
       if (textp->key == NULL)
-         return(1);
+      {
+         png_chunk_report(png_ptr, "text chunk: out of memory",
+               PNG_CHUNK_WRITE_ERROR);
+         return 1;
+      }
 
       png_debug2(2, "Allocated %lu bytes at %p in png_set_text",
           (unsigned long)(png_uint_32)
           (key_len + lang_len + lang_key_len + text_length + 4),
           textp->key);
 
-      memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len));
+      memcpy(textp->key, text_ptr[i].key, key_len);
       *(textp->key + key_len) = '\0';
 
       if (text_ptr[i].compression > 0)
@@ -849,8 +865,7 @@ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
       }
 
       if (text_length)
-         memcpy(textp->text, text_ptr[i].text,
-             (png_size_t)(text_length));
+         memcpy(textp->text, text_ptr[i].text, text_length);
 
       *(textp->text + text_length) = '\0';
 
@@ -871,6 +886,7 @@ png_set_text_2(png_const_structrp png_ptr, png_inforp info_ptr,
       info_ptr->num_text++;
       png_debug1(3, "transferred text chunk %d", info_ptr->num_text);
    }
+
    return(0);
 }
 #endif
@@ -974,78 +990,87 @@ png_set_sPLT(png_const_structrp png_ptr,
  */
 {
    png_sPLT_tp np;
-   int i;
 
-   if (png_ptr == NULL || info_ptr == NULL || nentries <= 0 ||
-      entries == NULL)
+   if (png_ptr == NULL || info_ptr == NULL || nentries <= 0 || entries == NULL)
       return;
 
-   np = png_voidcast(png_sPLT_tp, png_malloc_warn(png_ptr,
-       (info_ptr->splt_palettes_num + nentries) * (sizeof (png_sPLT_t))));
+   /* Use the internal realloc function, which checks for all the possible
+    * overflows.  Notice that the parameters are (int) and (size_t)
+    */
+   np = png_voidcast(png_sPLT_tp,png_realloc_array(png_ptr,
+      info_ptr->splt_palettes, info_ptr->splt_palettes_num, nentries,
+      sizeof *np));
 
    if (np == NULL)
    {
-      png_warning(png_ptr, "No memory for sPLT palettes");
+      /* Out of memory or too many chunks */
+      png_chunk_report(png_ptr, "too many sPLT chunks", PNG_CHUNK_WRITE_ERROR);
       return;
    }
 
-   memcpy(np, info_ptr->splt_palettes,
-       info_ptr->splt_palettes_num * (sizeof (png_sPLT_t)));
-
    png_free(png_ptr, info_ptr->splt_palettes);
-   info_ptr->splt_palettes=NULL;
+   info_ptr->splt_palettes = np;
+   info_ptr->free_me |= PNG_FREE_SPLT;
 
-   /* TODO: fix this, it apparently leaves NULL entries in the event of OOM
-    * below.
-    */
-   for (i = 0; i < nentries; i++)
+   np += info_ptr->splt_palettes_num;
+
+   do
    {
-      png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
-      png_const_sPLT_tp from = entries + i;
       png_size_t length;
 
-      /* In event of error below the name and entries fields must be set to
-       * NULL, otherwise libpng will crash later on while trying to free the
-       * uninitialized pointers.
+      /* Skip invalid input entries */
+      if (entries->name == NULL || entries->entries == NULL)
+      {
+         /* png_handle_sPLT doesn't do this, so this is an app error */
+         png_app_error(png_ptr, "png_set_sPLT: invalid sPLT");
+         /* Just skip the invalid entry */
+         continue;
+      }
+
+      np->depth = entries->depth;
+
+      /* In the even of out-of-memory just return - there's no point keeping on
+       * trying to add sPLT chunks.
        */
-      memset(to, 0, (sizeof *to));
+      length = strlen(entries->name) + 1;
+      np->name = png_voidcast(png_charp, png_malloc_base(png_ptr, length));
 
-      if (from->name == NULL || from->entries == NULL)
-         continue;
+      if (np->name == NULL)
+         break;
 
-      length = strlen(from->name) + 1;
-      to->name = png_voidcast(png_charp, png_malloc_warn(png_ptr, length));
+      memcpy(np->name, entries->name, length);
 
-      if (to->name == NULL)
+      /* IMPORTANT: we have memory now that won't get freed if something else
+       * goes wrong, this code must free it.  png_malloc_array produces no
+       * warnings, use a png_chunk_report (below) if there is an error.
+       */
+      np->entries = png_voidcast(png_sPLT_entryp, png_malloc_array(png_ptr,
+          entries->nentries, sizeof (png_sPLT_entry)));
+
+      if (np->entries == NULL)
       {
-         png_warning(png_ptr,
-             "Out of memory while processing sPLT chunk");
-         continue;
+         png_free(png_ptr, np->name);
+         break;
       }
 
-      memcpy(to->name, from->name, length);
-      to->entries = png_voidcast(png_sPLT_entryp, png_malloc_warn(png_ptr,
-          from->nentries * (sizeof (png_sPLT_entry))));
+      np->nentries = entries->nentries;
+      /* This multiply can't overflow because png_malloc_array has already
+       * checked it when doing the allocation.
+       */
+      memcpy(np->entries, entries->entries,
+         entries->nentries * sizeof (png_sPLT_entry));
 
-      if (to->entries == NULL)
-      {
-         png_warning(png_ptr, "Out of memory while processing sPLT chunk");
-         png_free(png_ptr, to->name);
-         to->name = NULL;
-         continue;
-      }
-
-      memcpy(to->entries, from->entries,
-          from->nentries * (sizeof (png_sPLT_entry)));
-
-      to->nentries = from->nentries;
-      to->depth = from->depth;
+      /* Note that 'continue' skips the advance of the out pointer and out
+       * count, so an invalid entry is not added.
+       */
+      info_ptr->valid |= PNG_INFO_sPLT;
+      ++(info_ptr->splt_palettes_num);
+      ++np;
    }
+   while (++entries, --nentries);
 
-   info_ptr->splt_palettes = np;
-   info_ptr->splt_palettes_num += nentries;
-   info_ptr->valid |= PNG_INFO_sPLT;
-   info_ptr->free_me |= PNG_FREE_SPLT;
+   if (nentries > 0)
+      png_chunk_report(png_ptr, "sPLT out of memory", PNG_CHUNK_WRITE_ERROR);
 }
 #endif /* PNG_sPLT_SUPPORTED */
 
@@ -1069,6 +1094,9 @@ check_location(png_const_structrp png_ptr, int location)
          (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT));
    }
 
+   /* This need not be an internal error - if the app calls
+    * png_set_unknown_chunks on a read pointer it must get the location right.
+    */
    if (location == 0)
       png_error(png_ptr, "invalid location in png_set_unknown_chunks");
 
@@ -1090,7 +1118,8 @@ png_set_unknown_chunks(png_const_structrp png_ptr,
 {
    png_unknown_chunkp np;
 
-   if (png_ptr == NULL || info_ptr == NULL || num_unknowns <= 0)
+   if (png_ptr == NULL || info_ptr == NULL || num_unknowns <= 0 ||
+      unknowns == NULL)
       return;
 
    /* Check for the failure cases where support has been disabled at compile
@@ -1099,16 +1128,16 @@ png_set_unknown_chunks(png_const_structrp png_ptr,
     * code) but may be meaningless if the read or write handling of unknown
     * chunks is not compiled in.
     */
-#  if !(defined PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) && \
-      (defined PNG_READ_SUPPORTED)
+#  if !defined(PNG_READ_UNKNOWN_CHUNKS_SUPPORTED) && \
+      defined(PNG_READ_SUPPORTED)
       if (png_ptr->mode & PNG_IS_READ_STRUCT)
       {
          png_app_error(png_ptr, "no unknown chunk support on read");
          return;
       }
 #  endif
-#  if !(defined PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) && \
-      (defined PNG_WRITE_SUPPORTED)
+#  if !defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) && \
+      defined(PNG_WRITE_SUPPORTED)
       if (!(png_ptr->mode & PNG_IS_READ_STRUCT))
       {
          png_app_error(png_ptr, "no unknown chunk support on write");
@@ -1116,20 +1145,21 @@ png_set_unknown_chunks(png_const_structrp png_ptr,
       }
 #  endif
 
-   /* Prior to 1.6.0 this code used png_malloc_warn, however this meant that
+   /* Prior to 1.6.0 this code used png_malloc_warn; however, this meant that
     * unknown critical chunks could be lost with just a warning resulting in
-    * undefined behavior.  Changing to png_malloc fixes this by producing a
-    * png_error.  The (png_size_t) cast was also removed as it hides a potential
-    * overflow.
-    *
-    * TODO: fix the potential overflow in the multiply
+    * undefined behavior.  Now png_chunk_report is used to provide behavior
+    * appropriate to read or write.
     */
-   np = png_voidcast(png_unknown_chunkp, png_malloc(png_ptr,
-       (info_ptr->unknown_chunks_num + (unsigned int)num_unknowns) *
-       (sizeof (png_unknown_chunk))));
+   np = png_voidcast(png_unknown_chunkp, png_realloc_array(png_ptr,
+         info_ptr->unknown_chunks, info_ptr->unknown_chunks_num, num_unknowns,
+         sizeof *np));
 
-   memcpy(np, info_ptr->unknown_chunks,
-       info_ptr->unknown_chunks_num * (sizeof (png_unknown_chunk)));
+   if (np == NULL)
+   {
+      png_chunk_report(png_ptr, "too many unknown chunks",
+         PNG_CHUNK_WRITE_ERROR);
+      return;
+   }
 
    png_free(png_ptr, info_ptr->unknown_chunks);
    info_ptr->unknown_chunks = np; /* safe because it is initialized */
@@ -1140,24 +1170,41 @@ png_set_unknown_chunks(png_const_structrp png_ptr,
    /* Increment unknown_chunks_num each time round the loop to protect the
     * just-allocated chunk data.
     */
-   for (; --num_unknowns >= 0;
-      ++np, ++unknowns, ++(info_ptr->unknown_chunks_num))
+   for (; num_unknowns > 0; --num_unknowns, ++unknowns)
    {
-      memcpy(np->name, unknowns->name, (sizeof unknowns->name));
+      memcpy(np->name, unknowns->name, (sizeof np->name));
       np->name[(sizeof np->name)-1] = '\0';
-      np->size = unknowns->size;
       np->location = check_location(png_ptr, unknowns->location);
 
       if (unknowns->size == 0)
+      {
          np->data = NULL;
+         np->size = 0;
+      }
 
       else
       {
-         /* png_error is safe here because the list is stored in png_ptr */
          np->data = png_voidcast(png_bytep,
-            png_malloc(png_ptr, unknowns->size));
+            png_malloc_base(png_ptr, unknowns->size));
+
+         if (np->data == NULL)
+         {
+            png_chunk_report(png_ptr, "unknown chunk: out of memory",
+               PNG_CHUNK_WRITE_ERROR);
+            /* But just skip storing the unknown chunk */
+            continue;
+         }
+
          memcpy(np->data, unknowns->data, unknowns->size);
+         np->size = unknowns->size;
       }
+
+      /* These increments are skipped on out-of-memory for the data - the
+       * unknown chunk entry gets overwritten if the png_chunk_report returns.
+       * This is correct in the read case (the chunk is just dropped.)
+       */
+      ++np;
+      ++(info_ptr->unknown_chunks_num);
    }
 }
 
@@ -1171,7 +1218,7 @@ png_set_unknown_chunk_location(png_const_structrp png_ptr, png_inforp info_ptr,
     * TODO: add a png_app_warning in 1.7
     */
    if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 &&
-      (unsigned int)chunk < info_ptr->unknown_chunks_num)
+      chunk < info_ptr->unknown_chunks_num)
    {
       if ((location & (PNG_HAVE_IHDR|PNG_HAVE_PLTE|PNG_AFTER_IDAT)) == 0)
       {

pngstruct.h

@@ -1,11 +1,11 @@
 
 /* pngstruct.h - header file for PNG reference library
  *
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Copyright (c) 1998-2013 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 1.6.0 [(PENDING RELEASE)]
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
  *
  * This code is released under the libpng license.
  * For conditions of distribution and use, see the disclaimer
@@ -100,7 +100,7 @@ typedef struct png_XYZ
 } png_XYZ;
 #endif /* COLORSPACE */
 
-#if defined PNG_COLORSPACE_SUPPORTED || defined PNG_GAMMA_SUPPORTED
+#if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED)
 /* A colorspace is all the above plus, potentially, profile information,
  * however at present libpng does not use the profile internally so it is only
  * stored in the png_info struct (if iCCP is supported.)  The rendering intent
@@ -471,11 +471,12 @@ struct png_struct_def
 /* New member added in libpng-1.5.6 */
    png_bytep big_prev_row;
 
+/* New member added in libpng-1.5.7 */
    void (*read_filter[PNG_FILTER_VALUE_LAST-1])(png_row_infop row_info,
       png_bytep row, png_const_bytep prev_row);
 
 #ifdef PNG_READ_SUPPORTED
-#if defined PNG_COLORSPACE_SUPPORTED || defined PNG_GAMMA_SUPPORTED
+#if defined(PNG_COLORSPACE_SUPPORTED) || defined(PNG_GAMMA_SUPPORTED)
    png_colorspace   colorspace;
 #endif
 #endif

pngtest.c

@@ -1,8 +1,8 @@
 
 /* pngtest.c - a simple test program to test libpng
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
+ * Copyright (c) 1998-2013 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.)
  *
@@ -1470,7 +1470,8 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
 
    /* When the unknown vpAg/sTER chunks are written by pngtest the only way to
     * do it is to write them *before* calling png_write_end.  When unknown
-    * chunks are written by libpng, however, they are written just before IEND.     * There seems to be no way round this, however vpAg/sTER are not expected
+    * chunks are written by libpng, however, they are written just before IEND.
+    * There seems to be no way round this, however vpAg/sTER are not expected
     * after IDAT.
     */
    write_chunks(write_ptr, after_IDAT);
@@ -1949,4 +1950,4 @@ main(void)
 #endif
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef png_libpng_version_1_6_0beta33 Your_png_h_is_not_version_1_6_0beta33;
+typedef png_libpng_version_1_6_1beta02 Your_png_h_is_not_version_1_6_1beta02;

pngtrans.c

@@ -1,8 +1,8 @@
 
 /* pngtrans.c - transforms the data in a row (used by both readers and writers)
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Copyright (c) 1998-2013 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.)
  *

pngwio.c

@@ -1,8 +1,8 @@
 
 /* pngwio.c - functions for data output
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Copyright (c) 1998-2013 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.)
  *

pngwrite.c

@@ -1,8 +1,8 @@
 
 /* pngwrite.c - general routines to write a PNG file
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.1 [(PENDING RELEASE)]
+ * Copyright (c) 1998-2013 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.)
  *
@@ -12,7 +12,7 @@
  */
 
 #include "pngpriv.h"
-#if defined PNG_SIMPLIFIED_WRITE_SUPPORTED && defined PNG_STDIO_SUPPORTED
+#if defined(PNG_SIMPLIFIED_WRITE_SUPPORTED) && defined(PNG_STDIO_SUPPORTED)
 #  include <errno.h>
 #endif
 
@@ -447,7 +447,6 @@ png_write_end(png_structrp png_ptr, png_inforp info_ptr)
 }
 
 #ifdef PNG_CONVERT_tIME_SUPPORTED
-/* "tm" structure is not supported on WindowsCE */
 void PNGAPI
 png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm * ttime)
 {
@@ -501,15 +500,19 @@ png_create_write_struct_2,(png_const_charp user_png_ver, png_voidp error_ptr,
     */
    png_ptr->zbuffer_size = PNG_ZBUF_SIZE;
 
-   png_ptr->zlib_strategy = Z_FILTERED; /* may be overridden if no filters */
-   png_ptr->zlib_level = Z_DEFAULT_COMPRESSION;
+   /* The 'zlib_strategy' setting is irrelevant because png_default_claim in
+    * pngwutil.c defaults it according to whether or not filters will be used,
+    * and ignores this setting.
+    */
+   png_ptr->zlib_strategy = PNG_Z_DEFAULT_STRATEGY;
+   png_ptr->zlib_level = PNG_Z_DEFAULT_COMPRESSION;
    png_ptr->zlib_mem_level = 8;
    png_ptr->zlib_window_bits = 15;
    png_ptr->zlib_method = 8;
 
 #ifdef PNG_WRITE_COMPRESSED_TEXT_SUPPORTED
-   png_ptr->zlib_text_strategy = Z_DEFAULT_STRATEGY;
-   png_ptr->zlib_text_level = Z_DEFAULT_COMPRESSION;
+   png_ptr->zlib_text_strategy = PNG_TEXT_Z_DEFAULT_STRATEGY;
+   png_ptr->zlib_text_level = PNG_TEXT_Z_DEFAULT_COMPRESSION;
    png_ptr->zlib_text_mem_level = 8;
    png_ptr->zlib_text_window_bits = 15;
    png_ptr->zlib_text_method = 8;

pngwtran.c

@@ -1,8 +1,8 @@
 
 /* pngwtran.c - transforms the data in a row for PNG writers
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Copyright (c) 1998-2013 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.)
  *

pngwutil.c

@@ -1,8 +1,8 @@
 
 /* pngwutil.c - utilities to write a PNG file
  *
- * Last changed in libpng 1.6.0 [(PENDING RELEASE)]
- * Copyright (c) 1998-2012 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.0 [February 14, 2013]
+ * Copyright (c) 1998-2013 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.)
  *
@@ -338,10 +338,10 @@ png_deflate_claim(png_structrp png_ptr, png_uint_32 owner,
             strategy = png_ptr->zlib_strategy;
 
          else if (png_ptr->do_filter != PNG_FILTER_NONE)
-            strategy = Z_FILTERED;
+            strategy = PNG_Z_DEFAULT_STRATEGY;
 
          else
-            strategy = Z_DEFAULT_STRATEGY;
+            strategy = PNG_Z_DEFAULT_NOFILTER_STRATEGY;
       }
 
       else

projects/vstudio/libpng/libpng.vcxproj

@@ -23,8 +23,8 @@
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>libpng</RootNamespace>
   </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <Import Project="$(SolutionDir)\zlib.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>DynamicLibrary</ConfigurationType>
     <CharacterSet>MultiByte</CharacterSet>

projects/vstudio/pnglibconf/pnglibconf.vcxproj

@@ -17,6 +17,7 @@
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>MultiByte</CharacterSet>
   </PropertyGroup>
+  <Import Project="$(SolutionDir)\zlib.props" />
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>

projects/vstudio/pngstest/pngstest.vcxproj

@@ -23,8 +23,8 @@
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>pngstest</RootNamespace>
   </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <Import Project="$(SolutionDir)\zlib.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
@@ -96,7 +96,7 @@
     <Link>
       <SubSystem>Console</SubSystem>
       <GenerateDebugInformation>true</GenerateDebugInformation>
-      <AdditionalDependencies>libpng16.lib;zlib.lib</AdditionalDependencies>
+      <AdditionalDependencies>libpng16.lib</AdditionalDependencies>
       <AdditionalLibraryDirectories>$(OutDir)</AdditionalLibraryDirectories>
     </Link>
     <CustomBuildStep>
@@ -163,7 +163,7 @@
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <AdditionalDependencies>libpng16.lib;zlib.lib</AdditionalDependencies>
+      <AdditionalDependencies>libpng16.lib</AdditionalDependencies>
       <AdditionalLibraryDirectories>$(OutDir)</AdditionalLibraryDirectories>
       <LinkTimeCodeGeneration>UseLinkTimeCodeGeneration</LinkTimeCodeGeneration>
     </Link>

projects/vstudio/pngtest/pngtest.vcxproj

@@ -23,8 +23,8 @@
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>pngtest</RootNamespace>
   </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <Import Project="$(SolutionDir)\zlib.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>

projects/vstudio/pngunknown/pngunknown.vcxproj

@@ -23,8 +23,8 @@
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>pngunknown</RootNamespace>
   </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <Import Project="$(SolutionDir)\zlib.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>
@@ -96,7 +96,7 @@
     <Link>
       <SubSystem>Console</SubSystem>
       <GenerateDebugInformation>true</GenerateDebugInformation>
-      <AdditionalDependencies>libpng16.lib;zlib.lib</AdditionalDependencies>
+      <AdditionalDependencies>libpng16.lib</AdditionalDependencies>
       <AdditionalLibraryDirectories>$(OutDir)</AdditionalLibraryDirectories>
     </Link>
     <CustomBuildStep>
@@ -163,7 +163,7 @@
       <GenerateDebugInformation>true</GenerateDebugInformation>
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
-      <AdditionalDependencies>libpng16.lib;zlib.lib</AdditionalDependencies>
+      <AdditionalDependencies>libpng16.lib</AdditionalDependencies>
       <AdditionalLibraryDirectories>$(OutDir)</AdditionalLibraryDirectories>
       <LinkTimeCodeGeneration>UseLinkTimeCodeGeneration</LinkTimeCodeGeneration>
     </Link>

projects/vstudio/pngvalid/pngvalid.vcxproj

@@ -23,8 +23,8 @@
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>pngvalid</RootNamespace>
   </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <Import Project="$(SolutionDir)\zlib.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <CharacterSet>Unicode</CharacterSet>

projects/vstudio/readme.txt

@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.6.0beta33 - December 10, 2012
+libpng version 1.6.1beta02 - February 19, 2013
 
 Copyright (c) 1998-2010 Glenn Randers-Pehrson
 

projects/vstudio/zlib.props

@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.6.0beta33 - December 10, 2012
+ * libpng version 1.6.1beta02 - February 19, 2013
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
@@ -33,5 +33,13 @@
 	 below:
      -->
     <ZLibSrcDir>..\..\..\..\zlib-1.2.5</ZLibSrcDir>
+
+    <!-- The following line allows compilation for an ARM target with Visual
+         Studio 2012.  Notice that this is not supported by the Visual Studio
+         2012 IDE and that the programs that result cannot be run unless they
+         signed by Microsoft.  This is therefore untested; only Microsoft can
+         test it:
+     -->
+    <WindowsSDKDesktopARMSupport>true</WindowsSDKDesktopARMSupport>
   </PropertyGroup>
 </Project>

projects/vstudio/zlib/zlib.vcxproj

@@ -36,8 +36,8 @@
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>zlib</RootNamespace>
   </PropertyGroup>
-  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <Import Project="$(SolutionDir)\zlib.props" />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug Library|Win32'" Label="Configuration">
     <ConfigurationType>StaticLibrary</ConfigurationType>
   </PropertyGroup>

scripts/README.txt

@@ -1,9 +1,9 @@
 
-Makefiles for  libpng version 1.6.0beta33 - December 10, 2012
+Makefiles for  libpng version 1.6.1beta02 - February 19, 2013
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng16.so.16.1.6.0beta33)
+                       (gcc, creates libpng16.so.16.1.6.1beta02)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
                        ansi2knr (Requires ansi2knr.c from
@@ -20,7 +20,7 @@ pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.dec      =>  DEC Alpha UNIX makefile
  makefile.dj2      =>  DJGPP 2 makefile
  makefile.elf      =>  Linux/ELF makefile symbol versioning,
-                       (gcc, creates libpng16.so.16.1.6.0beta33)
+                       (gcc, creates libpng16.so.16.1.6.1beta02)
  makefile.freebsd  =>  FreeBSD makefile
  makefile.gcc      =>  Generic gcc makefile
  makefile.hpgcc    =>  HPUX makefile using gcc
@@ -35,12 +35,12 @@ pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.os2      =>  OS/2 Makefile (gcc and emx, requires libpng.def)
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng16.so.16.1.6.0beta33)
+                       creates libpng16.so.16.1.6.1beta02)
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng16.so.16.1.6.0beta33)
+                       creates libpng16.so.16.1.6.1beta02)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng16.so.16.1.6.0beta33)
+                       creates libpng16.so.16.1.6.1beta02)
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
  makefile.sunos    =>  Sun makefile
  makefile.32sunu   =>  Sun Ultra 32-bit makefile

scripts/def.dfn

@@ -8,31 +8,22 @@
  * and license in png.h
  */
 
-/* These macros exist to make the header and trailer shorter below: */
-#define S PNG_DEFN_MAGIC
-#define E PNG_DEFN_END
-
 /* Write the export file header: */
-S-;---------------------------------------------------------------E
-S-; LIBPNG module definition file for OS/2-E
-S-;---------------------------------------------------------------E
-S--E
-S-; If you give the library an explicit name one or other files-E
-S-; may need modifying to support the new name on one or more-E
-S-; systems.-E
-S-LIBRARY-E
-S-OS2 DESCRIPTION "PNG image compression library"-E
-S-OS2 CODE PRELOAD MOVEABLE DISCARDABLE-E
-S--E
-S-EXPORTS-E
-S-;Version 1.5.0beta58-E
+PNG_DFN ";--------------------------------------------------------------"
+PNG_DFN "; LIBPNG module definition file for OS/2"
+PNG_DFN ";--------------------------------------------------------------"
+PNG_DFN ""
+PNG_DFN "; If you give the library an explicit name one or other files"
+PNG_DFN "; may need modifying to support the new name on one or more"
+PNG_DFN "; systems."
+PNG_DFN "LIBRARY"
+PNG_DFN "OS2 DESCRIPTION "PNG image compression library""
+PNG_DFN "OS2 CODE PRELOAD MOVEABLE DISCARDABLE"
+PNG_DFN ""
+PNG_DFN "EXPORTS"
+PNG_DFN ";Version 1.6.1beta02"
 
-/* NOTE: PNG_JOIN is interpreted by the calling script as a signal to
- * join the two things on either side, so we can do symbol
- * substitution within the name, regular C ## joins the pp-tokens,
- * not their final values.
- */
 #define PNG_EXPORTA(ordinal, type, name, args, attributes)\
-	PNG_DEFN_MAGIC- SYMBOL_PREFIX PNG_JOIN name-PNG_DEFN_END
+        PNG_DFN "@" SYMBOL_PREFIX "@@" name "@"
 
 #include "../png.h"

scripts/dfn.awk

@@ -0,0 +1,135 @@
+#!/bin/awk -f
+# scripts/dfn.awk - process a .dfn file
+#
+# last changed in libpng version 1.5.14 - February 4, 2013
+#
+# Copyright (c) 2013-2013 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
+
+# The output of this script is written to the file given by
+# the variable 'out', which should be set on the command line.
+# Error messages are printed to stdout and if any are printed
+# the script will exit with error code 1.
+
+BEGIN{
+   out="/dev/null"       # as a flag
+   out_count=0           # count of output lines
+   err=0                 # set if an error occured
+   sort=0                # sort the output
+   array[""]=""
+}
+
+# The output file must be specified before any input:
+NR==1 && out == "/dev/null" {
+   print "out=output.file must be given on the command line"
+   # but continue without setting the error code, this allows the
+   # script to be checked easily
+}
+
+# Output can be sorted; two lines are recognized
+$1 == "PNG_DFN_START_SORT"{
+   sort=$2
+   next
+}
+
+$1 == "PNG_DFN_END_SORT"{
+   # Do a very simple, slow, sort; notice that blank lines won't be
+   # output by this
+   for (entry in array) {
+      while (array[entry] != "") {
+         key = entry
+         value = array[key]
+         array[key] = ""
+
+         for (alt in array) {
+            if (array[alt] != "" && alt < key) {
+               array[key] = value
+               value = array[alt]
+               key = alt
+               array[alt] = ""
+            }
+         }
+
+         print value >out
+      }
+   }
+   sort=0
+   next
+}
+
+/^[^"]*PNG_DFN *".*"[^"]*$/{
+    # A definition line, apparently correctly formated, extract the
+    # definition then replace any doubled "" that remain with a single
+    # double quote.  Notice that the original doubled double quotes
+    # may have been split by tokenization
+    orig=$0
+
+    if (gsub(/^[^"]*PNG_DFN *"/,"") != 1 || gsub(/"[^"]*$/, "") != 1) {
+	print "line", NR, "processing failed:"
+	print orig
+	print $0
+	err=1
+    } else {
+	++out_count
+    }
+
+    # Now examine quotes within the value:
+    #
+    #   @" - delete this and any following spaces
+    #   "@ - delete this and any original spaces
+    #   @' - replace this by a double quote
+    #
+    # This allows macro substitution by the C compiler thus:
+    #
+    #   #define first_name John
+    #   #define last_name Smith
+    #
+    #	PNG_DFN"#define name @'@" first_name "@ @" last_name "@@'"
+    #
+    # Might get C preprocessed to:
+    #
+    #   PNG_DFN "#define foo @'@" John "@ @" Smith "@@'"
+    #
+    # Which this script reduces to:
+    #
+    #	#define name "John Smith"
+    #
+    while (sub(/@" */, "")) {
+	if (!sub(/ *"@/, "")) {
+	    print "unbalanced @\" ... \"@ pair"
+	    err=1
+	    break
+	}
+    }
+
+    # Put any needed double quotes in
+    gsub(/@'/,"\"")
+
+    # Remove any trailing spaces (not really required, but for
+    # editorial consistency
+    sub(/ *$/, "")
+
+    if (sort)
+       array[$(sort)] = $0
+
+    else
+       print $0 >out
+    next
+}
+
+/PNG_DFN/{
+    print "line", NR, "incorrectly formated PNG_DFN line:"
+    print $0
+    err = 1
+}
+
+END{
+    if (out_count > 0 || err > 0)
+	exit err
+
+    print "no definition lines found"
+    exit 1
+}

scripts/intprefix.dfn

@@ -10,10 +10,10 @@
  */
 
 #define PNG_INTERNAL_DATA(type, name, array)\
-	PNG_DEFN_MAGIC-name-PNG_DEFN_END
+        PNG_DFN "@" name "@"
 
 #define PNG_INTERNAL_FUNCTION(type, name, args, attributes)\
-	PNG_DEFN_MAGIC-name-PNG_DEFN_END
+        PNG_DFN "@" name "@"
 
 #define PNGPREFIX_H /* self generation */
 #include "../pngpriv.h"

scripts/libpng-config-head.in

@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.6.0beta33
+version=1.6.1beta02
 prefix=""
 libdir=""
 libs=""

scripts/libpng.pc.in

@@ -5,6 +5,6 @@ includedir=@includedir@/libpng16
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.6.0beta33
+Version: 1.6.1beta02
 Libs: -L${libdir} -lpng16
 Cflags: -I${includedir}

scripts/makefile.cegcc

@@ -23,7 +23,7 @@
 
 VERMAJ = 1
 VERMIN = 6
-VERMIC = 0
+VERMIC = 1
 VER = $(VERMAJ).$(VERMIN).$(VERMIC)
 NAME = libpng
 PACKAGE = $(NAME)-$(VER)

scripts/makefile.linux

@@ -10,7 +10,7 @@
 # Library name:
 LIBNAME = libpng16
 PNGMAJ = 16
-RELEASE = 0
+RELEASE = 1
 
 # Shared library names:
 LIBSO=$(LIBNAME).so
@@ -236,4 +236,4 @@ pngwtran.o pngwtran.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h
 pngwutil.o pngwutil.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h             pnginfo.h pngdebug.h
 pngpread.o pngpread.pic.o: png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h             pnginfo.h pngdebug.h
 
-pngtest.o: png.h pngconf.h
+pngtest.o: png.h pngconf.h pnglibconf.h

scripts/makefile.msys

@@ -0,0 +1,204 @@
+# makefile for libpng using MSYS/gcc (shared, static library)
+# Copyright (C) 2012 Glenn Randers-Pehrson and Christopher M. Wheeler
+#
+# Portions taken from makefile.linux:
+# Copyright (C) 1998, 1999, 2002, 2006, 2008, 2010-2011 Greg Roelofs and
+# Glenn Randers-Pehrson
+# Copyright (C) 2000 Cosmin Truta
+# Copyright (C) 1996, 1997 Andreas Dilger
+# Copyright (C) 1995 Guy Eric Schalnat, Group 42, Inc.
+#
+# This code is released under the libpng license.
+# For conditions of distribution and use, see the disclaimer
+# and license in png.h
+# # # # # # # # # # # # # # # # #
+prefix=/usr/local
+exec_prefix=$(prefix)
+
+# Library name:
+LIBNAME = libpng16
+PNGMAJ = 16
+RELEASE = 1
+
+# Shared library names:
+LIBSO=$(LIBNAME).dll
+LIBSOMAJ=$(LIBNAME).dll.$(PNGMAJ)
+LIBSOREL=$(PNGMAJ).$(RELEASE)
+OLDSO=libpng.dll
+
+# Where the zlib library and include files are located.
+#ZLIBLIB=../zlib
+#ZLIBINC=../zlib
+ZLIBLIB=/usr/local/lib
+ZLIBINC=/usr/local/include
+
+# Compiler, linker, lib and other tools
+CC = gcc
+LD = $(CC)
+AR_RC = ar rcs
+RANLIB = ranlib
+RM_F = rm -rf
+MKDIR_P=mkdir -p
+LN_SF=ln -sf
+
+#ARCH = -march=pentium3
+#ARCH = -march=i686
+ARCH =
+CDEBUG = -g -DPNG_DEBUG=5
+LDDEBUG =
+CRELEASE = -O2
+LDRELEASE = -s
+#CFLAGS = -W -Wall $(CDEBUG)
+CFLAGS = -W -Wall $(CRELEASE) $(ARCH)
+#LDFLAGS = $(LDDEBUG)
+LDFLAGS = $(LDRELEASE)
+LIBS = -lz -lm
+
+# File extensions
+O=.o
+A=.a
+EXE=.exe
+
+INCPATH=$(prefix)/include
+LIBPATH=$(exec_prefix)/lib
+MANPATH=$(prefix)/man
+BINPATH=$(exec_prefix)/bin
+
+# override DESTDIR= on the make install command line to easily support
+# installing into a temporary location.  Example:
+#
+#    make install DESTDIR=/tmp/build/libpng
+#
+# If you're going to install into a temporary location
+# via DESTDIR, $(DESTDIR)$(prefix) must already exist before
+# you execute make install.
+
+DESTDIR=
+
+DB=$(DESTDIR)$(BINPATH)
+DI=$(DESTDIR)$(INCPATH)
+DL=$(DESTDIR)$(LIBPATH)
+DM=$(DESTDIR)$(MANPATH)
+
+# Variables
+OBJS =  png$(O) pngerror$(O) pngget$(O) pngmem$(O) pngpread$(O) \
+	pngread$(O) pngrio$(O) pngrtran$(O) pngrutil$(O) pngset$(O) \
+	pngtrans$(O) pngwio$(O) pngwrite$(O) pngwtran$(O) pngwutil$(O)
+
+# Targets
+all: static shared
+
+# see scripts/pnglibconf.mak for more options
+pnglibconf.h: scripts/pnglibconf.h.prebuilt
+	cp scripts/pnglibconf.h.prebuilt $@
+
+.c$(O):
+	$(CC) -c $(CFLAGS) -I$(ZLIBINC) $<
+
+static: libpng$(A) pngtest$(EXE)
+
+shared: $(LIBSOMAJ)
+	$(CC) -shared -Wl,-soname,$(LIBSOMAJ) -o $(LIBSO)
+
+$(LIBSO): $(LIBSOMAJ)
+	$(LN_SF) $(LIBSOMAJ) $(LIBSO)
+
+$(LIBSOMAJ):
+	$(CC) -shared -Wl,-soname,$(LIBSOMAJ) -o $(LIBSOMAJ)
+
+libpng$(A): $(OBJS)
+	$(AR_RC) $@ $(OBJS)
+	$(RANLIB) $@
+
+install-headers: png.h pngconf.h pnglibconf.h
+	-@if [ ! -d $(DI) ]; then $(MKDIR_P) $(DI); fi
+	-@if [ ! -d $(DI)/$(LIBNAME) ]; then $(MKDIR_P) $(DI)/$(LIBNAME); fi
+	cp png.h pngconf.h pnglibconf.h $(DI)/$(LIBNAME)
+	-@$(RM_F) $(DI)/png.h $(DI)/pngconf.h $(DI)/pnglibconf.h
+	-@$(RM_F) $(DI)/libpng
+	(cd $(DI); $(LN_SF) $(LIBNAME) libpng; $(LN_SF) $(LIBNAME)/* .)
+
+install-static: install-headers libpng.a
+	-@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi
+	cp libpng.a $(DL)/$(LIBNAME).a
+	-@$(RM_F) $(DL)/libpng.a
+	(cd $(DL); $(LN_SF) $(LIBNAME).a libpng.a)
+
+libpng.pc:
+	cat scripts/libpng.pc.in | sed -e s!@prefix@!$(prefix)! \
+	-e s!@exec_prefix@!$(exec_prefix)! \
+	-e s!@libdir@!$(LIBPATH)! \
+	-e s!@includedir@!$(INCPATH)! \
+	-e s!-lpng16!-lpng16\ -lz\ -lm! > libpng.pc
+
+libpng-config:
+	( cat scripts/libpng-config-head.in; \
+	echo prefix=\"$(prefix)\"; \
+	echo I_opts=\"-I$(INCPATH)/$(LIBNAME)\"; \
+	echo L_opts=\"-L$(LIBPATH)\"; \
+	echo R_opts=\"-Wl,-rpath,$(LIBPATH)\"; \
+	echo libs=\"-lpng16 -lz -lm\"; \
+	cat scripts/libpng-config-body.in ) > libpng-config
+
+install-shared: install-headers $(LIBSOMAJ) libpng.pc
+	-@if [ ! -d $(DL) ]; then $(MKDIR_P) $(DL); fi
+	-@$(RM_F) $(DL)/$(LIBSO)
+	-@$(RM_F) $(DL)/$(OLDSO)
+	cp $(LIBSO) $(DL)/$(LIBSOREL)
+	(cd $(DL); \
+	$(LN_SF) $(LIBSOREL) $(LIBSO); \
+	$(LN_SF) $(LIBSO) $(OLDSO))
+
+	-@if [ ! -d $(DL)/pkgconfig ]; then $(MKDIR_P) $(DL)/pkgconfig; fi
+	-@$(RM_F) $(DL)/pkgconfig/$(LIBNAME).pc
+	-@$(RM_F) $(DL)/pkgconfig/libpng.pc
+	cp libpng.pc $(DL)/pkgconfig/$(LIBNAME).pc
+	(cd $(DL)/pkgconfig; $(LN_SF) $(LIBNAME).pc libpng.pc)
+
+install-man: libpng.3 libpngpf.3 png.5
+	-@if [ ! -d $(DM) ]; then $(MKDIR_P) $(DM); fi
+	-@if [ ! -d $(DM)/man3 ]; then $(MKDIR_P) $(DM)/man3; fi
+	-@$(RM_F) $(DM)/man3/libpng.3
+	-@$(RM_F) $(DM)/man3/libpngpf.3
+	cp libpng.3 $(DM)/man3
+	cp libpngpf.3 $(DM)/man3
+	-@if [ ! -d $(DM)/man5 ]; then $(MKDIR_P) $(DM)/man5; fi
+	-@$(RM_F) $(DM)/man5/png.5
+	cp png.5 $(DM)/man5
+
+install-config: libpng-config
+	-@if [ ! -d $(DB) ]; then $(MKDIR_P) $(DB); fi
+	-@$(RM_F) $(DB)/libpng-config
+	-@$(RM_F) $(DB)/$(LIBNAME)-config
+	cp libpng-config $(DB)/$(LIBNAME)-config
+	(cd $(DB); $(LN_SF) $(LIBNAME)-config libpng-config)
+
+install: install-static install-shared install-man install-config
+
+test: pngtest$(EXE)
+	./pngtest$(EXE)
+
+pngtest$(EXE): pngtest$(O) libpng$(A)
+	$(LD) $(LDFLAGS) -L$(ZLIBLIB) -o $@ pngtest$(O) libpng$(A) $(LIBS)
+
+clean:
+	$(RM_F) *$(O) libpng$(A) pngtest$(EXE) pngout.png pnglibconf.h $(LIBSO) \
+	$(LIBSOMAJ) libpng-config
+
+png$(O):      png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngerror$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngget$(O):   png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngmem$(O):   png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngpread$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngread$(O):  png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngrio$(O):   png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngrtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngrutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngset$(O):   png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngtrans$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngwio$(O):   png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngwrite$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngwtran$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+pngwutil$(O): png.h pngconf.h pnglibconf.h pngpriv.h pngstruct.h pnginfo.h pngdebug.h
+
+pngtest$(O):  png.h pngconf.h pnglibconf.h

scripts/makefile.ne12bsd

@@ -17,7 +17,7 @@ INCSDIR=${LOCALBASE}/include/libpng16
 
 LIB=	png16
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.6.0beta33
+SHLIB_MINOR=	1.6.1beta02
 SRCS=	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

scripts/makefile.netbsd

@@ -17,7 +17,7 @@ INCSDIR=${LOCALBASE}/include
 
 LIB=	png
 SHLIB_MAJOR=	16
-SHLIB_MINOR=	1.6.0beta33
+SHLIB_MINOR=	1.6.1beta02
 SRCS=	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

scripts/makefile.openbsd

@@ -11,7 +11,7 @@ LIBDIR=	${PREFIX}/lib
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	16
-SHLIB_MINOR=	1.6.0beta33
+SHLIB_MINOR=	1.6.1beta02
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \

scripts/makefile.std

@@ -39,6 +39,7 @@ CPP = $(CC) -E
 ECHO = echo
 
 DFNFLAGS = # DFNFLAGS contains -D options to use in the libpng build
+DFA_EXTRA = # extra files that can be used to control configuration
 CFLAGS=-I$(ZLIBINC) -O # -g -DPNG_DEBUG=5
 LDFLAGS=-L. -L$(ZLIBLIB) -lpng -lz -lm
 
@@ -50,23 +51,23 @@ all: libpng.a pngtest
 
 # The standard pnglibconf.h exists as scripts/pnglibconf.h.prebuilt,
 # copy this if the following doesn't work.
-pnglibconf.dfn: scripts/pnglibconf.dfa scripts/options.awk pngconf.h
-	$(RM_F) $@ dfn?.out
-	$(AWK) -f scripts/options.awk out=dfn1.out version=search pngconf.h\
-	    scripts/pnglibconf.dfa $(DFA_XTRA) 1>&2
-	$(AWK) -f scripts/options.awk out=dfn2.out dfn1.out 1>&2
-	cp dfn2.out $@
-	$(RM_F) dfn?.out
-
 pnglibconf.h: pnglibconf.dfn
-	$(RM_F) $@ dfn.c dfn?.out
-	$(ECHO) '#include "pnglibconf.dfn"' >dfn.c
-	$(CPP) $(DFNFLAGS) dfn.c >dfn1.out
-	$(SED) -n -e 's|^.*PNG_DEFN_MAGIC *-\(.*\)- *PNG_DEFN_END.*$$|\1|p'\
-	    dfn1.out >dfn2.out
-	$(SED) -e 's| *PNG_JOIN *||g' -e 's| *$$||' dfn2.out >dfn3.out
-	cp dfn3.out $@
-	$(RM_F) dfn.c dfn?.out
+	$(RM_F) $@ pnglibconf.c pnglibconf.out pnglibconf.tmp
+	$(ECHO) '#include "pnglibconf.dfn"' >pnglibconf.c
+	$(ECHO) "If '$(CC) -E' crashes try /lib/cpp (e.g. CPP='/lib/cpp')" >&2
+	$(CPP) $(DFNFLAGS) pnglibconf.c >pnglibconf.out
+	$(AWK) -f "scripts/dfn.awk" out="pnglibconf.tmp" pnglibconf.out 1>&2
+	mv pnglibconf.tmp $@
+
+pnglibconf.dfn: scripts/pnglibconf.dfa scripts/options.awk pngconf.h pngusr.dfa $(DFA_XTRA)
+	$(RM_F) $@ pnglibconf.pre pnglibconf.tmp
+	$(ECHO) "Calling $(AWK) from scripts/pnglibconf.mak" >&2
+	$(ECHO) "If 'awk' crashes try a better awk (e.g. AWK='nawk')" >&2
+	$(AWK) -f scripts/options.awk out="pnglibconf.pre"\
+	    version=search pngconf.h scripts/pnglibconf.dfa\
+	    pngusr.dfa $(DFA_XTRA) 1>&2
+	$(AWK) -f scripts/options.awk out="pnglibconf.tmp" pnglibconf.pre 1>&2
+	mv pnglibconf.tmp $@
 
 libpng.a: $(OBJS)
 	$(AR_RC) $@  $(OBJS)
@@ -96,7 +97,7 @@ install: libpng.a pnglibconf.h
 	chmod 644 $(DESTDIR)$(LIBPATH)/libpng.a
 
 clean:
-	$(RM_F) *.o libpng.a pngtest pngout.png pnglibconf.* dfn.c dfn?.out
+	$(RM_F) *.o libpng.a pngtest pngout.png pnglibconf.*
 
 DOCS = ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO
 writelock:

scripts/options.awk

@@ -30,22 +30,33 @@
 # are copied to the preprocessed file).
 
 BEGIN{
-   out="/dev/null"              # intermediate, preprocessed, file
+   out=""                       # intermediate, preprocessed, file
    pre=-1                       # preprocess (first line)
    version="libpng version unknown" # version information
    version_file=""              # where to find the version
    err=0                        # in-line exit sets this
-   start="PNG_DEFN_MAGIC-"      # Arbitrary start
-   end="-PNG_DEFN_END"          # Arbitrary end
-   ct="PNG_JOIN"                # Join two tokens
-   cx= "/" ct "*"               # Open C comment for output file
-   comment=start cx             # Comment start
+   # The following definitions prevent the C preprocessor noticing the lines
+   # that will be in the final output file.  Some C preprocessors tokenise
+   # the lines, for example by inserting spaces around operators, and all
+   # C preprocessors notice lines that start with '#', most remove comments.
+   # The technique adopted here is to make the final output lines into
+   # C strings (enclosed in double quotes), preceeded by PNG_DFN.  As a
+   # consequence the output cannot contain a 'raw' double quote - instead put
+   # @' in, this will be replaced by a single " afterward.  See the parser
+   # script dfn.awk for more capabilities (not required here).  Note that if
+   # you need a " in a 'setting' in pnglibconf.dfa it must also be @'!
+   dq="@'"                      # For a single double quote
+   start=" PNG_DFN \""          # Start stuff to output (can't contain a "!)
+   end="\" "                    # End stuff to output
+   subs="@\" "                  # Substitute start (substitute a C macro)
+   sube=" \"@"                  # Substitute end
+   comment=start "/*"           # Comment start
    cend="*/" end                # Comment end
-   def=start "#define PNG_" ct  # Arbitrary define
-   sup=ct "_SUPPORTED" end      # end supported option
-   und=comment "#undef PNG_" ct # Unsupported option
-   une=ct "_SUPPORTED" cend     # end unsupported option
-   error=start "ERROR:"         # error message
+   def=start "#define PNG_"     # Arbitrary define
+   sup="_SUPPORTED" end         # end supported option
+   und=comment "#undef PNG_"    # Unsupported option
+   une="_SUPPORTED" cend        # end unsupported option
+   error=start "ERROR:"         # error message, terminate with 'end'
 
    # Variables
    deb=0                        # debug - set on command line
@@ -68,7 +79,7 @@ BEGIN{
 }
 
 # The output file must be specified before any input:
-out == "/dev/null" {
+out == "" {
    print "out=output.file must be given on the command line"
    err = 1
    exit 1
@@ -241,46 +252,71 @@ $1 == "file" && NF >= 2{
 #   be later) entry may turn an option on or off explicitly.
 
 $1 == "option" && NF >= 2{
-   onoff = option[$2]  # records current (and the default is "", enabled)
+   opt = $2
+   sub(/,$/,"",opt)
+   onoff = option[opt]  # records current (and the default is "", enabled)
    key = ""
-   for (i=3; i<=NF; ++i) {
-      if ($(i) == "on" || $(i) == "off" || $(i) == "disabled") {
-         key = ""
-         if (onoff != $(i)) {
-            # on or off can zap disabled or enabled:
-            if (onoff == "" || (onoff == "disabled" || onoff == "enabled") && ($(i) == "on" || $(i) == "off")) {
-               # It's easy to mis-spell the option when turning it
-               # on or off, so warn about it here:
-               if (onoff == "" && ($(i) == "on" || $(i) == "off")) {
-                  print $2 ": ERROR: turning unrecognized option", $(i)
-                  # For the moment error out - it is safer
-                  err = 1 # prevent END{} running
-                  exit 1
-               }
-               onoff = $(i)
-            } else {
-               # Print a message, otherwise the error
-               # below is incomprehensible
-               print $2 ": currently", onoff ": attempt to turn", $(i)
-               break
-            }
+   istart = 3
+   do {
+      if (istart == 1) {     # continuation line
+         val = getline
+
+         if (val != 1) { # error reading it
+            if (val == 0)
+               print "option", opt ": ERROR: missing contination line"
+            else
+               print "option", opt ": ERROR: error reading continuation line"
+
+            # This is a hard error
+            err = 1 # prevent END{} running
+            exit 1
          }
-      } else if ($(i) == "requires" || $(i) == "if" || $(i) == "enables") {
-         key = $(i)
-      } else if (key == "requires") {
-         requires[$2] = requires[$2] " " $(i)
-      } else if (key == "if") {
-         iffs[$2] = iffs[$2] " " $(i)
-      } else if (key == "enables") {
-         enabledby[$(i)] = enabledby[$(i)] " " $2
-      } else
-         break # bad line format
-   }
+      }
+
+      for (i=istart; i<=NF; ++i) {
+         val=$(i)
+         sub(/,$/,"",val)
+         if (val == "on" || val == "off" || val == "disabled") {
+            key = ""
+            if (onoff != val) {
+               # on or off can zap disabled or enabled:
+               if (onoff == "" || (onoff == "disabled" || onoff == "enabled") &&
+                   (val == "on" || val == "off")) {
+                  # It's easy to mis-spell the option when turning it
+                  # on or off, so warn about it here:
+                  if (onoff == "" && (val == "on" || val == "off")) {
+                     print "option", opt ": ERROR: turning unrecognized option", val
+                     # For the moment error out - it is safer
+                     err = 1 # prevent END{} running
+                     exit 1
+                  }
+                  onoff = val
+               } else {
+                  # Print a message, otherwise the error
+                  # below is incomprehensible
+                  print "option", opt ": currently", onoff ": attempt to turn", val
+                  break
+               }
+            }
+         } else if (val == "requires" || val == "if" || val == "enables") {
+            key = val
+         } else if (key == "requires") {
+            requires[opt] = requires[opt] " " val
+         } else if (key == "if") {
+            iffs[opt] = iffs[opt] " " val
+         } else if (key == "enables") {
+            enabledby[val] = enabledby[val] " " opt
+         } else
+            break # bad line format
+      }
+
+      istart = 1
+   } while (i > NF && $0 ~ /,$/)
 
    if (i > NF) {
       # Set the option, defaulting to 'enabled'
       if (onoff == "") onoff = "enabled"
-      option[$2] = onoff
+      option[opt] = onoff
       next
    }
    # Else fall through to the error handler
@@ -300,41 +336,62 @@ $1 == "option" && NF >= 2{
 pre != 0 && $1 == "chunk" && NF >= 2{
    # 'chunk' is handled on the first pass by writing appropriate
    # 'option' lines into the intermediate file.
+   opt = $2
+   sub(/,$/,"",opt)
    onoff = ""
    reqread = ""
    reqwrite = ""
    enables = ""
-   i = 3 # indicates format error
-   if (NF > 2) {
+   req = 0
+   istart = 3
+   do {
+      if (istart == 1) {     # continuation line
+         val = getline
+
+         if (val != 1) { # error reading it
+            if (val == 0)
+               print "chunk", opt ": ERROR: missing contination line"
+            else
+               print "chunk", opt ": ERROR: error reading continuation line"
+
+            # This is a hard error
+            err = 1 # prevent END{} running
+            exit 1
+         }
+      }
+
       # read the keywords/additional OPTS
-      req = 0
-      for (i=3; i<=NF; ++i) {
-         if ($(i) == "on" || $(i) == "off" || $(i) == "disabled") {
-            if (onoff != $(i)) {
+      for (i=istart; i<=NF; ++i) {
+         val = $(i)
+         sub(/,$/,"",val)
+         if (val == "on" || val == "off" || val == "disabled") {
+            if (onoff != val) {
                if (onoff == "")
-                  onoff = $(i)
+                  onoff = val
                else
                   break # on/off conflict
             }
             req = 0
-         } else if ($(i) == "requires")
+         } else if (val == "requires")
             req = 1
-         else if ($(i) == "enables")
+         else if (val == "enables")
             req = 2
          else if (req == 1){
-            reqread = reqread " READ_" $(i)
-            reqwrite = reqwrite " WRITE_" $(i)
+            reqread = reqread " READ_" val
+            reqwrite = reqwrite " WRITE_" val
          } else if (req == 2)
-            enables = enables " " $(i)
+            enables = enables " " val
          else
             break # bad line: handled below
       }
-   }
+
+      istart = 1
+   } while (i > NF && $0 ~ /,$/)
 
    if (i > NF) {
       # Output new 'option' lines to the intermediate file (out)
-      print "option READ_" $2, "requires READ_ANCILLARY_CHUNKS" reqread, "enables", $2 enables , onoff >out
-      print "option WRITE_" $2, "requires WRITE_ANCILLARY_CHUNKS" reqwrite, "enables", $2 enables, onoff >out
+      print "option READ_" opt, "requires READ_ANCILLARY_CHUNKS" reqread, "enables", opt enables , onoff >out
+      print "option WRITE_" opt, "requires WRITE_ANCILLARY_CHUNKS" reqwrite, "enables", opt enables, onoff >out
       next
    }
    # Else hit the error handler below - bad line format!
@@ -472,6 +529,8 @@ END{
    print "" >out
    print "/* SETTINGS */" >out
    print comment, "settings", cend >out
+   # Sort (in dfn.awk) on field 2, the setting name
+   print "PNG_DFN_START_SORT 2" >out
    finished = 0
    while (!finished) {
       finished = 1
@@ -491,10 +550,17 @@ END{
          # All the requirements have been processed, output
          # this setting.
          if (deb) print "setting", i
+         deflt = defaults[i]
+         # A leading @ means leave it unquoted so the preprocessor
+         # can substitute the build time value
+         if (deflt ~ /^ @/)
+            deflt = " " subs substr(deflt, 3) sube
+         # Remove any spurious trailing spaces
+         sub(/ *$/,"",deflt)
          print "" >out
          print "/* setting: ", i >out
          print " *   requires:" setting[i] >out
-         print " *   default: ", defaults[i], "*/" >out
+         print " *   default: ", defaults[i] defltinfo, "*/" >out
          if (defaults[i] == "") { # no default, only check if defined
             print "#ifdef PNG_" i >out
          }
@@ -506,13 +572,14 @@ END{
          if (defaults[i] != "") { # default handling
             print "#ifdef PNG_" i >out
          }
-         print def i, "PNG_" i end >out
+         # PNG_<i> is defined, so substitute the value:
+         print def i, subs "PNG_" i sube end >out
          if (defaults[i] != "") {
             print "#else /*default*/" >out
             # And add the default definition for the benefit
             # of later settings an options test:
-            print "# define PNG_" i defaults[i] >out
-            print def i defaults[i] end >out
+            print "# define PNG_" i deflt >out
+            print def i deflt end >out
          }
          print "#endif" >out
 
@@ -528,6 +595,7 @@ END{
          exit 1
       }
    }
+   print "PNG_DFN_END_SORT" >out
    print comment, "end of settings", cend >out
 
    # Now do the options - somewhat more complex.  The dependency
@@ -622,6 +690,9 @@ END{
    }
    if (err) exit 1
 
+   # Sort options too
+   print "PNG_DFN_START_SORT 2" >out
+
    # option[i] is now the complete list of all the tokens we may
    # need to output, go through it as above, depth first.
    finished = 0
@@ -773,10 +844,11 @@ END{
          exit 1
       }
    }
+   print "PNG_DFN_END_SORT" >out
    print comment, "end of options", cend >out
 
    # Regular end - everything looks ok
    if (protect != "") {
-      print start "#endif", cx, protect, "*/" end >out
+      print start "#endif", "/*", protect, "*/" end >out
    }
 }

scripts/pnglibconf.dfa

@@ -8,7 +8,7 @@ com pnglibconf.h - library build configuration
 com
 version
 com
-com Copyright (c) 1998-2011 Glenn Randers-Pehrson
+com Copyright (c) 1998-2012 Glenn Randers-Pehrson
 com
 com This code is released under the libpng license.
 com For conditions of distribution and use, see the disclaimer
@@ -39,6 +39,11 @@ file pnglibconf.h scripts/pnglibconf.dfa PNGLCONF_H
 #    used as given (e.g. enables GAMMA just expands to that on the
 #    correspond READ_name and WRITE_name lines.)
 #
+# "," may be used to separate options on an 'option' line and is ignored; it
+# doesn't change the meaning of the line.  (NOT setting, where "," becomes
+# part of the setting!)  A comma at the end of an option line causes a
+# continuation (the next line is included in the option too.)
+#
 # Note that the 'on' and 'off' keywords, while valid on both option
 # and chunk, should not be used in this file because they force the
 # relevant options on or off.
@@ -182,6 +187,26 @@ setting PREFIX
 
 setting DEFAULT_READ_MACROS default 1
 
+# These settings configure the default compression level (0-9) and 'strategy';
+# strategy is as defined by the implementors of zlib, it describes the input
+# data and modifies the zlib parameters in an attempt to optimize the balance
+# between search and huffman encoding in the zlib algorithms.  The defaults are
+# the zlib.h defaults - the apparently recursive definition does not arise
+# because the name of the setting is prefixed by PNG_
+#
+# The TEXT values are the defaults when writing compressed text (all forms)
+#
+# Include the zlib header too, so that the defaults below are known
+@#  include <zlib.h>
+
+# The '@' here means to substitute the value when pnglibconf.h is built
+setting Z_DEFAULT_COMPRESSION default @Z_DEFAULT_COMPRESSION
+setting Z_DEFAULT_STRATEGY default @Z_FILTERED
+setting Z_DEFAULT_NOFILTER_STRATEGY default @Z_DEFAULT_STRATEGY
+
+setting TEXT_Z_DEFAULT_COMPRESSION default @Z_DEFAULT_COMPRESSION
+setting TEXT_Z_DEFAULT_STRATEGY default @Z_DEFAULT_STRATEGY
+
 # The alternative is to call functions to read PNG values, if
 # the functions are turned *off* the read macros must always
 # be enabled, so turning this off will actually force the
@@ -370,12 +395,12 @@ option READ_TRANSFORMS requires READ
 # If you handle gamma issues outside libpng then you do not need the libpng
 # gamma processing; and it is an enormous waste of space.  You just need to
 # remove the use of libpng APIs that depend on it.
-option READ_GAMMA requires READ_TRANSFORMS READ_gAMA
+option READ_GAMMA requires READ_TRANSFORMS, READ_gAMA
 
-option READ_ALPHA_MODE requires READ_TRANSFORMS READ_GAMMA
-option READ_BACKGROUND requires READ_TRANSFORMS READ_STRIP_ALPHA READ_GAMMA
+option READ_ALPHA_MODE requires READ_TRANSFORMS, READ_GAMMA
+option READ_BACKGROUND requires READ_TRANSFORMS, READ_STRIP_ALPHA, READ_GAMMA
 option READ_BGR requires READ_TRANSFORMS
-option READ_EXPAND_16 requires READ_TRANSFORMS READ_16BIT READ_EXPAND
+option READ_EXPAND_16 requires READ_TRANSFORMS, READ_16BIT, READ_EXPAND
 option READ_EXPAND requires READ_TRANSFORMS
 option READ_FILLER requires READ_TRANSFORMS
 option READ_GRAY_TO_RGB requires READ_TRANSFORMS
@@ -383,13 +408,13 @@ option READ_INVERT_ALPHA requires READ_TRANSFORMS
 option READ_INVERT requires READ_TRANSFORMS
 option READ_PACK requires READ_TRANSFORMS
 option READ_PACKSWAP requires READ_TRANSFORMS
-option READ_RGB_TO_GRAY requires READ_TRANSFORMS READ_GAMMA
+option READ_RGB_TO_GRAY requires READ_TRANSFORMS, READ_GAMMA
 option READ_SCALE_16_TO_8 requires READ_TRANSFORMS
 option READ_SHIFT requires READ_TRANSFORMS
 option READ_STRIP_16_TO_8 requires READ_TRANSFORMS
 option READ_STRIP_ALPHA requires READ_TRANSFORMS
 option READ_SWAP_ALPHA requires READ_TRANSFORMS
-option READ_SWAP requires READ_TRANSFORMS READ_16BIT
+option READ_SWAP requires READ_TRANSFORMS, READ_16BIT
 option READ_USER_TRANSFORM requires READ_TRANSFORMS
 
 option PROGRESSIVE_READ requires READ
@@ -428,7 +453,7 @@ option WRITE_TRANSFORMS requires WRITE
 option WRITE_SHIFT requires WRITE_TRANSFORMS
 option WRITE_PACK requires WRITE_TRANSFORMS
 option WRITE_BGR requires WRITE_TRANSFORMS
-option WRITE_SWAP requires WRITE_TRANSFORMS WRITE_16BIT
+option WRITE_SWAP requires WRITE_TRANSFORMS, WRITE_16BIT
 option WRITE_PACKSWAP requires WRITE_TRANSFORMS
 option WRITE_INVERT requires WRITE_TRANSFORMS
 option WRITE_FILLER requires WRITE_TRANSFORMS
@@ -450,8 +475,8 @@ option WRITE_FLUSH requires WRITE
 
 # Note: these can be turned off explicitly if not required by the
 # apps implementing the user transforms
-option USER_TRANSFORM_PTR if READ_USER_TRANSFORM WRITE_USER_TRANSFORM
-option USER_TRANSFORM_INFO if READ_USER_TRANSFORM WRITE_USER_TRANSFORM
+option USER_TRANSFORM_PTR if READ_USER_TRANSFORM, WRITE_USER_TRANSFORM
+option USER_TRANSFORM_INFO if READ_USER_TRANSFORM, WRITE_USER_TRANSFORM
 
 # This enables API to set compression parameters for compressing
 # non-IDAT chunks (zTXt, iTXt, iCCP, and unknown chunks).  This feature
@@ -644,7 +669,7 @@ chunk bKGD
 chunk cHRM enables COLORSPACE
 chunk gAMA enables GAMMA
 chunk hIST
-chunk iCCP enables COLORSPACE GAMMA
+chunk iCCP enables COLORSPACE, GAMMA
 chunk iTXt
 chunk oFFs
 chunk pCAL
@@ -652,7 +677,7 @@ chunk pHYs
 chunk sBIT
 chunk sCAL
 chunk sPLT
-chunk sRGB enables COLORSPACE GAMMA
+chunk sRGB enables COLORSPACE, GAMMA
 chunk tEXt requires TEXT
 chunk tIME
 chunk tRNS
@@ -682,7 +707,7 @@ option WRITE_UNKNOWN_CHUNKS enables STORE_UNKNOWN_CHUNKS
 # to png_get_unknown_chunks, the application must call
 # png_set_keep_unknown_chunks to cause this to actually happen (see png.h)
 option SAVE_UNKNOWN_CHUNKS requires READ requires SET_UNKNOWN_CHUNKS
-option SAVE_UNKNOWN_CHUNKS enables READ_UNKNOWN_CHUNKS STORE_UNKNOWN_CHUNKS
+option SAVE_UNKNOWN_CHUNKS enables READ_UNKNOWN_CHUNKS, STORE_UNKNOWN_CHUNKS
 
 # The second approach is to use an application provided callback to process the
 # chunks, the callback can either handle the chunk entirely itself or request
@@ -690,8 +715,8 @@ option SAVE_UNKNOWN_CHUNKS enables READ_UNKNOWN_CHUNKS STORE_UNKNOWN_CHUNKS
 #
 # Note that there is no 'WRITE_USER_CHUNKS' so the USER_CHUNKS option is always
 # the same as READ_USER_CHUNKS at present
-option READ_USER_CHUNKS requires READ requires UNKNOWN_CHUNKS
-option READ_USER_CHUNKS enables READ_UNKNOWN_CHUNKS USER_CHUNKS
+option READ_USER_CHUNKS requires READ, UNKNOWN_CHUNKS
+option READ_USER_CHUNKS enables READ_UNKNOWN_CHUNKS, USER_CHUNKS
 
 # Two further options are provided to allow detailed control of the handling.
 # The first enables png_set_keep_unknown_chunks; this allows the default to be
@@ -758,17 +783,21 @@ option INFO_IMAGE
 
 option CHECK_FOR_INVALID_INDEX enables READ_CHECK_FOR_INVALID_INDEX
 option CHECK_FOR_INVALID_INDEX enables WRITE_CHECK_FOR_INVALID_INDEX
-option READ_CHECK_FOR_INVALID_INDEX requires READ CHECK_FOR_INVALID_INDEX
-option WRITE_CHECK_FOR_INVALID_INDEX requires WRITE CHECK_FOR_INVALID_INDEX
+option READ_CHECK_FOR_INVALID_INDEX requires READ, CHECK_FOR_INVALID_INDEX
+option WRITE_CHECK_FOR_INVALID_INDEX requires WRITE, CHECK_FOR_INVALID_INDEX
+
+# added at libpng-1.5.15
+option GET_PALETTE_MAX enables READ_GET_PALETTE_MAX WRITE_GET_PALETTE_MAX
+option READ_GET_PALETTE_MAX requires READ_CHECK_FOR_INVALID_INDEX disabled
+option WRITE_GET_PALETTE_MAX requires WRITE_CHECK_FOR_INVALID_INDEX disabled
 
 # Simplified API options (added at libpng-1.6.0)
 # Read:
-option SIMPLIFIED_READ requires SEQUENTIAL_READ READ_TRANSFORMS SETJMP
-option SIMPLIFIED_READ requires BENIGN_ERRORS READ_GAMMA
-option SIMPLIFIED_READ enables READ_EXPAND READ_16BIT READ_EXPAND_16
-option SIMPLIFIED_READ enables READ_SCALE_16_TO_8 READ_RGB_TO_GRAY
-option SIMPLIFIED_READ enables READ_ALPHA_MODE READ_BACKGROUND READ_STRIP_ALPHA
-option SIMPLIFIED_READ enables READ_FILLER READ_SWAP
+option SIMPLIFIED_READ,
+   requires SEQUENTIAL_READ READ_TRANSFORMS, SETJMP, BENIGN_ERRORS READ_GAMMA,
+   enables READ_EXPAND, READ_16BIT READ_EXPAND_16, READ_SCALE_16_TO_8,
+      READ_RGB_TO_GRAY, READ_ALPHA_MODE READ_BACKGROUND READ_STRIP_ALPHA,
+      READ_FILLER, READ_SWAP
 
 option SIMPLIFIED_READ_AFIRST requires SIMPLIFIED_READ disabled
 option READ_SWAP_ALPHA enables SIMPLIFIED_READ_AFIRST
@@ -777,8 +806,9 @@ option SIMPLIFIED_READ_BGR requires SIMPLIFIED_READ disabled
 option READ_BGR enables SIMPLIFIED_READ_BGR
 
 # Write:
-option SIMPLIFIED_WRITE requires WRITE STDIO SETJMP
-option SIMPLIFIED_WRITE enables WRITE_SWAP WRITE_gAMA WRITE_sRGB WRITE_cHRM
+option SIMPLIFIED_WRITE,
+   requires WRITE STDIO, SETJMP,
+   enables WRITE_SWAP WRITE_gAMA, WRITE_sRGB WRITE_cHRM
 
 option SIMPLIFIED_WRITE_AFIRST requires SIMPLIFIED_WRITE disabled
 option WRITE_SWAP_ALPHA enables SIMPLIFIED_WRITE_AFIRST
@@ -787,5 +817,5 @@ option SIMPLIFIED_WRITE_BGR requires SIMPLIFIED_WRITE disabled
 option WRITE_BGR enables SIMPLIFIED_WRITE_BGR
 
 # Formats:
-option FORMAT_AFIRST if SIMPLIFIED_READ_AFIRST SIMPLIFIED_WRITE_AFIRST
-option FORMAT_BGR if SIMPLIFIED_READ_BGR SIMPLIFIED_WRITE_BGR
+option FORMAT_AFIRST if SIMPLIFIED_READ_AFIRST, SIMPLIFIED_WRITE_AFIRST
+option FORMAT_BGR if SIMPLIFIED_READ_BGR, SIMPLIFIED_WRITE_BGR

scripts/pnglibconf.h.prebuilt

@@ -3,9 +3,9 @@
 
 /* pnglibconf.h - library build configuration */
 
-/* Libpng 1.6.0beta33 - December 10, 2012 */
+/* Libpng 1.6.1beta02 - February 19, 2013 */
 
-/* Copyright (c) 1998-2012 Glenn Randers-Pehrson */
+/* Copyright (c) 1998-2013 Glenn Randers-Pehrson */
 
 /* This code is released under the libpng license. */
 /* For conditions of distribution and use, see the disclaimer */
@@ -32,10 +32,15 @@
 #define PNG_QUANTIZE_BLUE_BITS 5
 #define PNG_QUANTIZE_GREEN_BITS 5
 #define PNG_QUANTIZE_RED_BITS 5
-#define PNG_sCAL_PRECISION 5
-#define PNG_sRGB_PROFILE_CHECKS 2
+#define PNG_TEXT_Z_DEFAULT_COMPRESSION (-1)
+#define PNG_TEXT_Z_DEFAULT_STRATEGY 0
 #define PNG_WEIGHT_SHIFT 8
 #define PNG_ZBUF_SIZE 8192
+#define PNG_Z_DEFAULT_COMPRESSION (-1)
+#define PNG_Z_DEFAULT_NOFILTER_STRATEGY 0
+#define PNG_Z_DEFAULT_STRATEGY 1
+#define PNG_sCAL_PRECISION 5
+#define PNG_sRGB_PROFILE_CHECKS 2
 /* end of settings */
 /* options */
 #define PNG_16BIT_SUPPORTED
@@ -43,10 +48,8 @@
 #define PNG_BENIGN_ERRORS_SUPPORTED
 #define PNG_BENIGN_READ_ERRORS_SUPPORTED
 /*#undef PNG_BENIGN_WRITE_ERRORS_SUPPORTED*/
-#define PNG_bKGD_SUPPORTED
 #define PNG_BUILD_GRAYSCALE_PALETTE_SUPPORTED
 #define PNG_CHECK_FOR_INVALID_INDEX_SUPPORTED
-#define PNG_cHRM_SUPPORTED
 #define PNG_COLORSPACE_SUPPORTED
 #define PNG_CONSOLE_IO_SUPPORTED
 #define PNG_CONVERT_tIME_SUPPORTED
@@ -58,19 +61,13 @@
 #define PNG_FLOATING_POINT_SUPPORTED
 #define PNG_FORMAT_AFIRST_SUPPORTED
 #define PNG_FORMAT_BGR_SUPPORTED
-#define PNG_gAMA_SUPPORTED
 #define PNG_GAMMA_SUPPORTED
+#define PNG_GET_PALETTE_MAX_SUPPORTED
 #define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
-#define PNG_hIST_SUPPORTED
-#define PNG_iCCP_SUPPORTED
 #define PNG_INCH_CONVERSIONS_SUPPORTED
 #define PNG_INFO_IMAGE_SUPPORTED
 #define PNG_IO_STATE_SUPPORTED
-#define PNG_iTXt_SUPPORTED
 #define PNG_MNG_FEATURES_SUPPORTED
-#define PNG_oFFs_SUPPORTED
-#define PNG_pCAL_SUPPORTED
-#define PNG_pHYs_SUPPORTED
 #define PNG_POINTER_INDEXING_SUPPORTED
 #define PNG_PROGRESSIVE_READ_SUPPORTED
 #define PNG_READ_16BIT_SUPPORTED
@@ -78,61 +75,60 @@
 #define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
 #define PNG_READ_BACKGROUND_SUPPORTED
 #define PNG_READ_BGR_SUPPORTED
-#define PNG_READ_bKGD_SUPPORTED
 #define PNG_READ_CHECK_FOR_INVALID_INDEX_SUPPORTED
-#define PNG_READ_cHRM_SUPPORTED
 #define PNG_READ_COMPOSITE_NODIV_SUPPORTED
 #define PNG_READ_COMPRESSED_TEXT_SUPPORTED
 #define PNG_READ_EXPAND_16_SUPPORTED
 #define PNG_READ_EXPAND_SUPPORTED
 #define PNG_READ_FILLER_SUPPORTED
-#define PNG_READ_gAMA_SUPPORTED
 #define PNG_READ_GAMMA_SUPPORTED
+#define PNG_READ_GET_PALETTE_MAX_SUPPORTED
 #define PNG_READ_GRAY_TO_RGB_SUPPORTED
-#define PNG_READ_hIST_SUPPORTED
-#define PNG_READ_iCCP_SUPPORTED
 #define PNG_READ_INTERLACING_SUPPORTED
 #define PNG_READ_INT_FUNCTIONS_SUPPORTED
 #define PNG_READ_INVERT_ALPHA_SUPPORTED
 #define PNG_READ_INVERT_SUPPORTED
-#define PNG_READ_iTXt_SUPPORTED
-#define PNG_READ_oFFs_SUPPORTED
 #define PNG_READ_OPT_PLTE_SUPPORTED
-#define PNG_READ_PACK_SUPPORTED
 #define PNG_READ_PACKSWAP_SUPPORTED
-#define PNG_READ_pCAL_SUPPORTED
-#define PNG_READ_pHYs_SUPPORTED
+#define PNG_READ_PACK_SUPPORTED
 #define PNG_READ_QUANTIZE_SUPPORTED
 #define PNG_READ_RGB_TO_GRAY_SUPPORTED
-#define PNG_READ_sBIT_SUPPORTED
 #define PNG_READ_SCALE_16_TO_8_SUPPORTED
-#define PNG_READ_sCAL_SUPPORTED
 #define PNG_READ_SHIFT_SUPPORTED
-#define PNG_READ_sPLT_SUPPORTED
-#define PNG_READ_sRGB_SUPPORTED
 #define PNG_READ_STRIP_16_TO_8_SUPPORTED
 #define PNG_READ_STRIP_ALPHA_SUPPORTED
 #define PNG_READ_SUPPORTED
 #define PNG_READ_SWAP_ALPHA_SUPPORTED
 #define PNG_READ_SWAP_SUPPORTED
-#define PNG_READ_tEXt_SUPPORTED
 #define PNG_READ_TEXT_SUPPORTED
-#define PNG_READ_tIME_SUPPORTED
 #define PNG_READ_TRANSFORMS_SUPPORTED
-#define PNG_READ_tRNS_SUPPORTED
 #define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
 #define PNG_READ_USER_CHUNKS_SUPPORTED
 #define PNG_READ_USER_TRANSFORM_SUPPORTED
+#define PNG_READ_bKGD_SUPPORTED
+#define PNG_READ_cHRM_SUPPORTED
+#define PNG_READ_gAMA_SUPPORTED
+#define PNG_READ_hIST_SUPPORTED
+#define PNG_READ_iCCP_SUPPORTED
+#define PNG_READ_iTXt_SUPPORTED
+#define PNG_READ_oFFs_SUPPORTED
+#define PNG_READ_pCAL_SUPPORTED
+#define PNG_READ_pHYs_SUPPORTED
+#define PNG_READ_sBIT_SUPPORTED
+#define PNG_READ_sCAL_SUPPORTED
+#define PNG_READ_sPLT_SUPPORTED
+#define PNG_READ_sRGB_SUPPORTED
+#define PNG_READ_tEXt_SUPPORTED
+#define PNG_READ_tIME_SUPPORTED
+#define PNG_READ_tRNS_SUPPORTED
 #define PNG_READ_zTXt_SUPPORTED
 /*#undef PNG_SAFE_LIMITS_SUPPORTED*/
 #define PNG_SAVE_INT_32_SUPPORTED
 #define PNG_SAVE_UNKNOWN_CHUNKS_SUPPORTED
-#define PNG_sBIT_SUPPORTED
-#define PNG_sCAL_SUPPORTED
 #define PNG_SEQUENTIAL_READ_SUPPORTED
+#define PNG_SETJMP_SUPPORTED
 #define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
 #define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
-#define PNG_SETJMP_SUPPORTED
 #define PNG_SET_UNKNOWN_CHUNKS_SUPPORTED
 #define PNG_SET_USER_LIMITS_SUPPORTED
 #define PNG_SIMPLIFIED_READ_AFIRST_SUPPORTED
@@ -141,15 +137,10 @@
 #define PNG_SIMPLIFIED_WRITE_AFIRST_SUPPORTED
 #define PNG_SIMPLIFIED_WRITE_BGR_SUPPORTED
 #define PNG_SIMPLIFIED_WRITE_SUPPORTED
-#define PNG_sPLT_SUPPORTED
-#define PNG_sRGB_SUPPORTED
 #define PNG_STDIO_SUPPORTED
 #define PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED
-#define PNG_tEXt_SUPPORTED
 #define PNG_TEXT_SUPPORTED
 #define PNG_TIME_RFC1123_SUPPORTED
-#define PNG_tIME_SUPPORTED
-#define PNG_tRNS_SUPPORTED
 #define PNG_UNKNOWN_CHUNKS_SUPPORTED
 #define PNG_USER_CHUNKS_SUPPORTED
 #define PNG_USER_LIMITS_SUPPORTED
@@ -160,45 +151,62 @@
 #define PNG_WRITE_16BIT_SUPPORTED
 #define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
 #define PNG_WRITE_BGR_SUPPORTED
-#define PNG_WRITE_bKGD_SUPPORTED
 #define PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED
-#define PNG_WRITE_cHRM_SUPPORTED
 #define PNG_WRITE_COMPRESSED_TEXT_SUPPORTED
 #define PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
 #define PNG_WRITE_FILLER_SUPPORTED
 #define PNG_WRITE_FILTER_SUPPORTED
 #define PNG_WRITE_FLUSH_SUPPORTED
-#define PNG_WRITE_gAMA_SUPPORTED
-#define PNG_WRITE_hIST_SUPPORTED
-#define PNG_WRITE_iCCP_SUPPORTED
+#define PNG_WRITE_GET_PALETTE_MAX_SUPPORTED
 #define PNG_WRITE_INTERLACING_SUPPORTED
 #define PNG_WRITE_INT_FUNCTIONS_SUPPORTED
 #define PNG_WRITE_INVERT_ALPHA_SUPPORTED
 #define PNG_WRITE_INVERT_SUPPORTED
+#define PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
+#define PNG_WRITE_PACKSWAP_SUPPORTED
+#define PNG_WRITE_PACK_SUPPORTED
+#define PNG_WRITE_SHIFT_SUPPORTED
+#define PNG_WRITE_SUPPORTED
+#define PNG_WRITE_SWAP_ALPHA_SUPPORTED
+#define PNG_WRITE_SWAP_SUPPORTED
+#define PNG_WRITE_TEXT_SUPPORTED
+#define PNG_WRITE_TRANSFORMS_SUPPORTED
+#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
+#define PNG_WRITE_USER_TRANSFORM_SUPPORTED
+#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
+#define PNG_WRITE_bKGD_SUPPORTED
+#define PNG_WRITE_cHRM_SUPPORTED
+#define PNG_WRITE_gAMA_SUPPORTED
+#define PNG_WRITE_hIST_SUPPORTED
+#define PNG_WRITE_iCCP_SUPPORTED
 #define PNG_WRITE_iTXt_SUPPORTED
 #define PNG_WRITE_oFFs_SUPPORTED
-#define PNG_WRITE_OPTIMIZE_CMF_SUPPORTED
-#define PNG_WRITE_PACK_SUPPORTED
-#define PNG_WRITE_PACKSWAP_SUPPORTED
 #define PNG_WRITE_pCAL_SUPPORTED
 #define PNG_WRITE_pHYs_SUPPORTED
 #define PNG_WRITE_sBIT_SUPPORTED
 #define PNG_WRITE_sCAL_SUPPORTED
-#define PNG_WRITE_SHIFT_SUPPORTED
 #define PNG_WRITE_sPLT_SUPPORTED
 #define PNG_WRITE_sRGB_SUPPORTED
-#define PNG_WRITE_SUPPORTED
-#define PNG_WRITE_SWAP_ALPHA_SUPPORTED
-#define PNG_WRITE_SWAP_SUPPORTED
 #define PNG_WRITE_tEXt_SUPPORTED
-#define PNG_WRITE_TEXT_SUPPORTED
 #define PNG_WRITE_tIME_SUPPORTED
-#define PNG_WRITE_TRANSFORMS_SUPPORTED
 #define PNG_WRITE_tRNS_SUPPORTED
-#define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
-#define PNG_WRITE_USER_TRANSFORM_SUPPORTED
-#define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
 #define PNG_WRITE_zTXt_SUPPORTED
+#define PNG_bKGD_SUPPORTED
+#define PNG_cHRM_SUPPORTED
+#define PNG_gAMA_SUPPORTED
+#define PNG_hIST_SUPPORTED
+#define PNG_iCCP_SUPPORTED
+#define PNG_iTXt_SUPPORTED
+#define PNG_oFFs_SUPPORTED
+#define PNG_pCAL_SUPPORTED
+#define PNG_pHYs_SUPPORTED
+#define PNG_sBIT_SUPPORTED
+#define PNG_sCAL_SUPPORTED
+#define PNG_sPLT_SUPPORTED
+#define PNG_sRGB_SUPPORTED
+#define PNG_tEXt_SUPPORTED
+#define PNG_tIME_SUPPORTED
+#define PNG_tRNS_SUPPORTED
 #define PNG_zTXt_SUPPORTED
 /* end of options */
 #endif /* PNGLCONF_H */

scripts/pnglibconf.mak

@@ -3,7 +3,7 @@
 #
 # These lines are copied from Makefile.am, they illustrate
 # how to automate the build of pnglibconf.h from scripts/pnglibconf.dfa
-# given 'awk' and 'sed'
+# given just 'awk', a C preprocessor and standard command line utilities
 
 # Override as appropriate, these definitions can be overridden on
 # the make command line (AWK='nawk' for example).
@@ -12,10 +12,9 @@ AWK = mawk
 AWK = nawk
 AWK = one-true-awk
 AWK = awk  # Crashes on SunOS 5.10 - use 'nawk'
-CPP = $(CC) -E # Does not work on SUN OS 5.10 - use /lib/cpp
-SED = sed
+CPP = $(CC) -E # On SUN OS 5.10 if this causes problems use /lib/cpp
 
-COPY = cp
+MOVE = mv
 DELETE = rm -f
 ECHO = echo
 DFA_XTRA = # Put your configuration file here, see scripts/pnglibconf.dfa.  Eg:
@@ -32,28 +31,24 @@ srcdir = .
 # The standard pnglibconf.h exists as scripts/pnglibconf.h.prebuilt,
 # copy this if the following doesn't work.
 pnglibconf.h: pnglibconf.dfn
-	$(DELETE) $@ dfn.c dfn1.out dfn2.out dfn3.out
-	$(ECHO) '#include "pnglibconf.dfn"' >dfn.c
-	$(CPP) $(DFNFLAGS) dfn.c >dfn1.out
-	$(ECHO) "If 'cpp -e' crashes try /lib/cpp (e.g. CPP='/lib/cpp')" >&2
-	$(SED) -n -e 's|^.*PNG_DEFN_MAGIC *-\(.*\)- *PNG_DEFN_END.*$$|\1|p'\
-	    dfn1.out >dfn2.out
-	$(SED) -e 's| *PNG_JOIN *||g' -e 's| *$$||' dfn2.out >dfn3.out
-	$(COPY) dfn3.out $@
-	$(DELETE) dfn.c dfn1.out dfn2.out dfn3.out
+	$(DELETE) $@ pnglibconf.c pnglibconf.out pnglibconf.tmp
+	$(ECHO) '#include "pnglibconf.dfn"' >pnglibconf.c
+	$(ECHO) "If '$(CC) -E' crashes try /lib/cpp (e.g. CPP='/lib/cpp')" >&2
+	$(CPP) $(DFNFLAGS) pnglibconf.c >pnglibconf.out
+	$(AWK) -f "$(srcdir)/scripts/dfn.awk" out="pnglibconf.tmp" pnglibconf.out 1>&2
+	$(MOVE) pnglibconf.tmp $@
 
-pnglibconf.dfn: $(srcdir)/scripts/pnglibconf.dfa $(srcdir)/scripts/options.awk $(srcdir)/pngconf.h $(srcdir)/pngusr.dfa
-	$(DELETE) $@ dfn1.out dfn2.out
+pnglibconf.dfn: $(srcdir)/scripts/pnglibconf.dfa $(srcdir)/scripts/options.awk $(srcdir)/pngconf.h $(srcdir)/pngusr.dfa $(DFA_XTRA)
+	$(DELETE) $@ pnglibconf.pre pnglibconf.tmp
 	$(ECHO) "Calling $(AWK) from scripts/pnglibconf.mak" >&2
 	$(ECHO) "If 'awk' crashes try a better awk (e.g. AWK='nawk')" >&2
-	$(AWK) -f $(srcdir)/scripts/options.awk out=dfn1.out version=search\
-		$(srcdir)/pngconf.h $(srcdir)/scripts/pnglibconf.dfa\
-		$(srcdir)/pngusr.dfa $(DFA_XTRA) 1>&2
-	$(AWK) -f $(srcdir)/scripts/options.awk out=dfn2.out dfn1.out 1>&2
-	$(COPY) dfn2.out $@
-	$(DELETE) dfn1.out dfn2.out
+	$(AWK) -f $(srcdir)/scripts/options.awk out="pnglibconf.pre"\
+	    version=search $(srcdir)/pngconf.h $(srcdir)/scripts/pnglibconf.dfa\
+	    $(srcdir)/pngusr.dfa $(DFA_XTRA) 1>&2
+	$(AWK) -f $(srcdir)/scripts/options.awk out="pnglibconf.tmp" pnglibconf.pre 1>&2
+	$(MOVE) pnglibconf.tmp $@
 
 clean-pnglibconf:
-	$(DELETE) pnglibconf.h pnglibconf.dfn dfn.c dfn1.out dfn2.out dfn3.out
+	$(DELETE) pnglibconf.*
 
 clean: clean-pnglibconf

scripts/prefix.dfn

@@ -10,11 +10,15 @@
  */
 
 #define PNG_EXPORTA(ordinal, type, name, args, attributes)\
-	PNG_DEFN_MAGIC-name-PNG_DEFN_END
+        PNG_DFN "@" name "@"
 
 /* The configuration information *before* the additional of symbol renames,
  * the list is the C name list; no symbol prefix.
  */
 #include "pnglibconf.out"
 
+PNG_DFN_START_SORT 1
+
 #include "../png.h"
+
+PNG_DFN_END_SORT

scripts/sym.dfn

@@ -10,6 +10,6 @@
  */
 
 #define PNG_EXPORTA(ordinal, type, name, args, attributes)\
-	PNG_DEFN_MAGIC-SYMBOL_PREFIX PNG_JOIN name-PNG_DEFN_END
+        PNG_DFN "@" SYMBOL_PREFIX "@@" name "@"
 
 #include "../png.h"

scripts/symbols.def

@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.6.0beta33
+;Version 1.6.1beta02
  png_access_version_number @1
  png_set_sig_bytes @2
  png_sig_cmp @3
@@ -247,3 +247,4 @@ EXPORTS
  png_image_write_to_stdio @240
  png_convert_to_rfc1123_buffer @241
  png_set_check_for_invalid_index @242
+ png_get_palette_max @243

scripts/symbols.dfn

@@ -17,11 +17,11 @@
  */
 
 #define PNG_EXPORTA(ordinal, type, name, args, attributes)\
-	PNG_DEFN_MAGIC-name @ordinal-PNG_DEFN_END
+        PNG_DFN "@" name "@ @@" ordinal "@"
 #define PNG_REMOVED(ordinal, type, name, args, attributes)\
-	PNG_DEFN_MAGIC-; name @ordinal-PNG_DEFN_END
+        PNG_DFN "; @" name "@ @@" ordinal "@"
 #define PNG_EXPORT_LAST_ORDINAL(ordinal)\
-	PNG_DEFN_MAGIC-; @ordinal-PNG_DEFN_END
+        PNG_DFN "; @@" ordinal "@"
 
 /* Read the defaults, but use scripts/pnglibconf.h.prebuilt; the 'standard'
  * header file.

scripts/vers.dfn

@@ -9,18 +9,11 @@
  * and license in png.h
  */
 
-#define HEADER PNG_DEFN_MAGIC-PNGLIB_LIBNAME {global:-PNG_DEFN_END
-
-/* NOTE: PNG_JOIN is interpreted by the calling script as a signal to
- * join the two things on either side, so we can do symbol
- * substitution within the name, regular C ## joins the pp-tokens,
- * not their final values.
- */
 #define PNG_EXPORTA(ordinal, type, name, args, attributes)\
-	PNG_DEFN_MAGIC- SYMBOL_PREFIX PNG_JOIN name;-PNG_DEFN_END
+        PNG_DFN " @" SYMBOL_PREFIX "@@" name "@;"
 
-#define TRAILER PNG_DEFN_MAGIC-local: *; };-PNG_DEFN_END
+PNG_DFN "@" PNGLIB_LIBNAME "@ {global:"
 
-HEADER
 #include "../png.h"
-TRAILER
+
+PNG_DFN "local: *; };"

test-pngtest.sh

@@ -1,16 +0,0 @@
-#!/bin/sh
-
-echo "Running tests.  For details see pngtest-log.txt"
-
-echo "============ pngtest pngtest.png ==============" > pngtest-log.txt
-
-echo "Running test-pngtest.sh"
-if ./pngtest --strict ${srcdir}/pngtest.png >> pngtest-log.txt 2>&1
-then
-  echo "  PASS: pngtest --strict pngtest.png"
-  err=0
-else
-  echo "  FAIL: pngtest --strict pngtest.png"
-  err=1
-fi
-exit $err

tests/pngstest

@@ -0,0 +1,13 @@
+#!/bin/sh
+#
+# Usage:
+#
+#  tests/pngstest pattern
+#
+# Runs pngstest on all the contrib/pngsuite/[^x]*${pattern}.png files
+# NOTE: pattern is used to name the temporary files pngstest generates
+#
+pattern="$1"
+shift
+exec ./pngstest --strict --tmpfile "${pattern}" --log ${1+"$@"}\
+   "${srcdir}/contrib/pngsuite/"[a-wyz]*${pattern}".png"

tests/pngstest-0g01

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec "${srcdir}/tests/pngstest" 0g01

tests/pngstest-0g02

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec "${srcdir}/tests/pngstest" 0g02

tests/pngstest-0g04

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec "${srcdir}/tests/pngstest" 0g04

tests/pngstest-0g08

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec "${srcdir}/tests/pngstest" 0g08

tests/pngstest-0g16

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec "${srcdir}/tests/pngstest" 0g16

tests/pngstest-2c08

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec "${srcdir}/tests/pngstest" 2c08