Imported from libpng-1.0.4c.tar

ANNOUNCE

@@ -1,10 +1,12 @@
 
-Libpng 1.0.4 - September 19, 1999
+Libpng 1.0.4c - October 1, 1999
 
-This is a public release of libpng, intended for use in production codes.
+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.
 
 Changes since the last public release (1.0.3):
 
+version 1.0.3a [August 12, 1999]
   Added check for PNG_READ_INTERLACE_SUPPORTED in pngread.c; issue a warning
      if an attempt is made to read an interlaced image when it's not supported.
   Added check if png_ptr->trans is defined before free'ing it in pngread.c
@@ -32,25 +34,50 @@ Changes since the last public release (1.0.3):
     consistent with PNG-1.2, and allow variance of 500 before complaining.
   Added assembler code contributed by Intel in file pngvcrd.c and modified
     makefile.w32 to use it (Nirav Chhatrapati, INTEL Corporation, Gilles Vollant)
-  Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code.
   Changed "ln -s -f" to "ln -f -s" in the makefiles to make Solaris happy.
+  Added some aliases for png_set_expand() in pngrtran.c, namely
+    png_set_expand_PLTE(), png_set_expand_depth(), and png_set_expand_tRNS()
+    (Greg Roelofs, in "PNG: The Definitive Guide").
   Added makefile.beo for BEOS on X86, contributed by Sander Stok.
+version 1.0.3b [August 26, 1999]
   Replaced 2147483647L several places with PNG_MAX_UINT macro, defined in png.h
   Changed leading blanks to tabs in all makefiles.
+  Define PNG_USE_PNGVCRD in makefile.w32, to get MMX assembler code.
   Made alternate versions of  png_set_expand() in pngrtran.c, namely
     png_set_gray_1_2_4_to_8, png_set_palette_to_rgb, and png_set_tRNS_to_alpha
-    (Greg Roelofs, in "PNG: The Definitive Guide").
+    (Greg Roelofs, in "PNG: The Definitive Guide").  Deleted the 1.0.3a aliases.
   Relocated start of 'extern "C"' block in png.h so it doesn't include pngconf.h
   Revised calculation of num_blocks in pngmem.c to avoid a potentially
     negative shift distance, whose results are undefined in the C language.
   Added a check in pngset.c to prevent writing multiple tIME chunks.
   Added a check in pngwrite.c to detect invalid small window_bits sizes.
+version 1.0.3d [September 4, 1999]
+  Fixed type casting of igamma in pngrutil.c
+  Added new png_expand functions to scripts/pngdef.pas and pngos2.def
   Added a demo read_user_transform_fn that examines the row filters in pngtest.c
+version 1.0.4 [September 24, 1999]
   Define PNG_ALWAYS_EXTERN in pngconf.h if __STDC__ is defined
+  Delete #define PNG_INTERNAL and include "png.h" from pngasmrd.h
   Made several minor corrections to pngtest.c
   Changed "hptr += 16L" to "hptr = hptr + 16L" in pngmem.c for Turbo 3.0
   Renamed the makefiles with longer but more user friendly extensions.
   Copied the PNG copyright and license to a separate LICENSE file.
+  Revised documentation, png.h, and example.c to remove reference to
+    "viewing_gamma" which no longer appears in the PNG specification.
+  Revised pngvcrd.c to use MMX code for interlacing only on the final pass.
+  Updated pngvcrd.c to use the faster C filter algorithms from libpng-1.0.1a
+  Split makefile.win32vc into two versions, makefile.vcawin32 (uses MMX
+    assembler code) and makefile.vcwin32 (doesn't).
+  Added a CPU timing report to pngtest.c (enabled by defining PNGTEST_TIMING)
+version 1.0.4a September 25, 1999
+  Increase max_pixel_depth in pngrutil.c if a user transform needs it.
+  Changed several division operations to right-shifts in pngvcrd.c
+version 1.0.4b September 30, 1999
+  Added parentheses in line 3732 of pngvcrd.c
+  Added a comment in makefile.linux warning about buggy -O3 in pgcc 2.95.1
+version 1.0.4c [October 1, 1999]
+  Added a "png_check_version" function in png.c and pngtest.c that will generate
+    a helpful compiler error if an old png.h is found in the search path.
 
 Send comments/corrections/commendations to
 png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu