Imported from libpng-1.0.2.tar
This commit is contained in:
Glenn Randers-Pehrson
parent
f7d1a17033
commit
345bc27e70
25
ANNOUNCE
25
ANNOUNCE
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@ -1,12 +1,10 @@
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Libpng 1.0.1e - June 6, 1998
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Libpng 1.0.2 - June 14, 1998
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This is not intended to be a public release. It will be replaced
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within a few weeks by a public version or by another test version.
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This is a public release of libpng, intended for use in production codes.
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Changes since the last public release:
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Changes since the previous public release (1.0.1):
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version 1.0.1a [April 21, 1998]
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Optimized Paeth calculations by replacing abs() function calls with intrinsics
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plus other loop optimizations. Improves avg decoding speed by about 20%.
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Commented out i386istic "align" compiler flags in makefile.lnx.
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@ -21,20 +19,13 @@ version 1.0.1a [April 21, 1998]
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than num_palette entries -- test was done before num_palette was defined.
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Fixed a png_convert_to_rfc1123() bug that converts day 31 to 0 (Steve Eddins).
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Changed compiler flags in makefile.wat for better optimization (Pawel Mrochen).
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version 1.0.1b [May 2, 1998]
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Relocated png_do_gray_to_rgb() within png_do_read_transformations() (Greg).
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Relocated the png_composite macros from pngrtran.c to png.h (Greg).
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Added makefile.sco (contributed by Mike Hopkirk).
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Fixed two bugs (missing definitions of "istop") introduced in libpng-1.0.1a.
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Fixed a bug in pngrtran.c that would set channels=5 under some circumstances.
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More work on the Paeth-filtering, achieving imperceptible speedup (A Kleinert).
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More work on loop optimization which may help when compiled with C++ compilers.
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Added warnings when people try to use transforms they've defined out.
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Collapsed 4 "i" and "c" loops into single "i" loops in pngrtran and pngwtran.
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Revised paragraph about png_set_expand() in libpng.txt and libpng.3 (Greg)
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version 1.0.1c [May 11, 1998]
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Fixed a bug in pngrtran.c (introduced in libpng-1.0.1a) where the masks for
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filler bytes should have been 0xff instead of 0xf.
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Added max_pixel_depth=32 in pngrutil.c when using FILLER with palette images.
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Moved PNG_WRITE_WEIGHTED_FILTER_SUPPORTED and PNG_WRITE_FLUSH_SUPPORTED
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out of the PNG_WRITE_TRANSFORMS_NOT_SUPPORTED block of pngconf.h
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@ -44,9 +35,6 @@ version 1.0.1c [May 11, 1998]
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to make it easier to remove unwanted capabilities via the compile line
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Made some corrections to grammar (which, it's) in documentation (Greg).
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Corrected example.c, use of row_pointers in png_write_image().
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version 1.0.1d [May 24, 1998]
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Corrected several statements that used side effects illegally in pngrutil.c
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and pngtrans.c, that were introduced in version 1.0.1b
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Revised png_read_rows() to avoid repeated if-testing for NULL (A Kleinert)
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More corrections to example.c, use of row_pointers in png_write_image()
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and png_read_rows().
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@ -54,7 +42,6 @@ version 1.0.1d [May 24, 1998]
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Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5
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Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.)
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Changed several loops from count-down to count-up, for consistency.
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version 1.0.1e [June 5, 1998]
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Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and
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added warnings when people try to set png_read_fn and png_write_fn in
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the same structure.
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@ -69,8 +56,12 @@ version 1.0.1e [June 5, 1998]
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Added capability for user-provided malloc_fn() and free_fn() functions,
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and revised pngtest.c to demonstrate their use, replacing the
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PNGTEST_DEBUG_MEM feature.
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Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner).
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Fixed two bugs in makefile.bor
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Send comments/corrections/commendations to
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png-implement@dworkin.wustl.edu or to randeg@alumni.rpi.edu
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Glenn R-P
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Glenn Randers-Pehrson
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libpng maintainer
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PNG Development Group
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4
CHANGES
4
CHANGES
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@ -334,7 +334,7 @@ version 1.0.1d [May 24, 1998]
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Bob Dellaca, to make a png32bd.dll with Borland C++ 4.5
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Fixed error in example.c with png_set_text: num_text is 3, not 2 (Guido V.)
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Changed several loops from count-down to count-up, for consistency.
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version 1.0.1e [June 6, 1998]
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version 1.0.2 [June 14, 1998]
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Revised libpng.txt and libpng.3 description of png_set_read|write_fn(), and
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added warnings when people try to set png_read_fn and png_write_fn in
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the same structure.
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@ -349,3 +349,5 @@ version 1.0.1e [June 6, 1998]
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Added capability for user-provided malloc_fn() and free_fn() functions,
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and revised pngtest.c to demonstrate their use, replacing the
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PNGTEST_DEBUG_MEM feature.
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Added makefile.w32, for Microsoft C++ 4.0 and later (Tim Wegner).
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Fixed two bugs in makefile.bor
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5
INSTALL
5
INSTALL
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@ -1,5 +1,5 @@
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Installing libpng version 1.0.1e - June 6, 1998
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Installing libpng version 1.0.2 - June 14, 1998
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Before installing libpng, you must first install zlib. zlib
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can usually be found wherever you got libpng. zlib can be
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@ -10,7 +10,7 @@ zlib.h and zconf.h include files that correspond to the
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version of zlib that's installed.
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You can rename the directories that you downloaded (they
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might be called "libpng-1.0.1e" or "lpng102" and "zlib-1.1.2"
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might be called "libpng-1.0.2" or "lpng102" and "zlib-1.1.2"
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or "zlib112") so that you have directories called "zlib" and "libpng".
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Your directory structure should look like this:
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@ -56,6 +56,7 @@ include
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build.bat => MS-DOS batch file for Borland compiler
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makefile.dj2 => DJGPP 2 makefile
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makefile.msc => Microsoft C makefile
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makefile.w32 => makefile for Microsoft Visual C++ 4.0 and later
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makefile.tc3 => Turbo C 3.0 makefile
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makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def)
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pngos2.def => OS/2 module definition file used by makefile.os2
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195
KNOWNBUG
195
KNOWNBUG
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@ -1,196 +1,19 @@
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Known bugs and suggested enhancements in libpng-1.0.1
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Known bugs and suggested enhancements in libpng-1.0.2
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1. March 13, 1998 -- BUG -- pngtrans.c:
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row_info->channels should be updated --
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row_info->color_type should be updated --
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STATUS: I think this is all fixed in libpng-1.0.1a but needs
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to be tested.
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2. March 14, 1998 -- ENHANCEMENT -- Glenn
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We should add the G>GA, G>GX, G>AG, and G>XG transformations
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in png_do_read_filler()
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STATUS: Implemented in libpng-1.0.1a
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3. March 14, 1998 -- BUG? -- Greg Roelofs
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pngrtran.c: if-test for channels/FILLER may be incorrect
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STATUS: Under investigation. Appears to be working correctly
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in libpng-1.0.1c.
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4. March 15, 1998 -- BUG -- Kevin Bracey
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pngwtran.c:
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line 306: loop should count to row_info->width, not to
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row_info->width*row_info->channnels
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STATUS: Fixed in libpng-1.0.1a
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5. March 15, 1998 -- OPTIMIZATION -- Kevin Bracey
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1. March 15, 1998 -- OPTIMIZATION -- Kevin Bracey
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Loops need to be optimized everywhere
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a. Make them count down instead of up -- Kevin Bracey
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Make them count down instead of up -- Kevin Bracey
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Optimizing compilers don't need this, and making
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the change would be error prone -- Tom Lane, Glenn R-P
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Optimizing compilers don't need this, and making
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the change would be error prone -- Tom Lane, Glenn R-P
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Question whether i-- or --i is better.
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Question whether i-- or --i is better.
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STATUS: Under investigation. About 150 loops turned around
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in libpng-1.0.1d, for testing. Object files and executables
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are about 20k smaller in SGI and gcc-compiled codes.
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STATUS: Under investigation, postponed until after
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libpng-1.0.2. About 160 loops turned around
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in libpng-1.0.2a, for testing.
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b. Remove products and structure members from loop tests -- Glenn R-P
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Can be accomplished without messing with loop guts. This
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was shown to be effective on optimized SGI compiler:
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replace
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png_uint_32 i;
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for(i=0; i < s->a*s->b; i++)
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with
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png_uint_32 i, istop;
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istop = s->a*s->b;
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for(i=0; i<istop; i++)
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STATUS: Mostly done in libpng-1.0.1a, done for all important loops.
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More done in libpng-1.0.1b.
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c. Replace abs() with intrinsic ternary operations in Paeth
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filtering -- Glenn R-P
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STATUS: Done in libpng-1.0.1a
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(can be restored to original behavior with #define PNG_USE_ABS)
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d. In pngwutil.c, make separate simple loops to use when filter
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heuristic sums aren't needed. -- Glenn R-P
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STATUS: Done in libpng-1.0.1a
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6. April 6, 1998 -- BUG -- bug in pngset.c (rowbytes too large) -- Bob Dellaca
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pngset.c has a bug, introduced in version 0.99c, that sets rowbytes
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too large when writing an image with bit_depth < 8
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STATUS: Fixed in libpng-1.0.1a
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7. April 10, 1998 -- BUG -- pngwutil weighted filtering bugs -- Glenn R-P
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pngwutil.c has some bugs in the experimental weighted filter
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algorithm (PNG_FILTER_XXX should be PNG_FILTER_VALUE_XXX in
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several places)
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STATUS: Andreas concurs. Fixed in libpng-1.0.1a
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8. April 10, 1998 -- ENHANCEMENT -- run-time selection of malloc function
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-- Bob Dellaca
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pngmem.c currently provides a compile-time option to replace
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png_malloc() and png_free(). It's been requested that these
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be made possible at run time, via calls to new png_set_malloc_fn()
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and png_set_free_fn() functions.
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STATUS: Under consideration
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9. April 11, 1998 -- BUG -- incorrect truncation of tRNS data in
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illegal PNG file where tRNS precedes PLTE -- Larry Reeve
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There is a misplaced pngrutil code block that truncates tRNS if it has
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more than num_palette entries -- test was done before num_palette was
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defined. Although the PNG file is illegal, it shouldn't crash apps.
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There is a simple fix; just moving the test to the point after
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num_palette has been defined.
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STATUS: Fixed in libpng-1.0.1a
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10. April 16, 1998 -- BUG -- incorrect operation of png_convert_to_rfc1123
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with 31st day of the month -- Steve Eddins
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The "ptime->date % 31" is wrong, should be "ptime->date % 32".
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STATUS: Fixed in libpng-1.0.1a
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11. April 21, 1998 -- ENHANCEMENT -- relocation of composite macros
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png_composite() and png_composite_16() relocated to png.h
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STATUS: Done in libpng-1.0.1b
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12. April 22, 1998 -- ENHANCEMENT -- makefile.sco
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Mike Hopkirk contributed a makefile for SCO osr5 and sco UW7
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STATUS: Added to libpng-1.0.1b distribution
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13: April 30, 1998 -- ENHANCEMENT -- warnings
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When people define out some of the read transformations and then
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try to use them, the request is silently ignored. It was suggested
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that a warning be issued in such cases.
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STATUS: Done in libpng-1.0.1b
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14. May 2, 1998 -- BUG -- incorrect mask for filler bytes
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In pngrtran.c, png_do_filler(), the masks for hi_filler and low_filler
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should be 0xff instead of 0xf
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STATUS: Fixed in libpng-1.0.1c
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15. May 3, 1998 -- BUG -- buffer overflow in png_do_read_filler()
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In pngrutil.c, max_pixel_depth needs to be set to 32 when using
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png_do_read_filler with palette images.
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STATUS: Fixed in libpng-1.0.1c (see also items 1 and 3 above).
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16. May 3, 1998 -- BUG -- type definitions wrong on error functions -- Tom Lane
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In png_create_xxx_struct(), the error functions should have typedef
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png_voidp instead of (void *). Needs to be corrected in the functions,
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the prototypes in png.h, the example.c file, and libpng.txt and libpng.3
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STATUS: Fixed in libpng-1.0.1c
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17. May 10, 1998 -- DOCUMENTATION -- Greg
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There are a number of incorrect usages of "which" and "it's" in the
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comments.
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STATUS:
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Fixed in libpng-1.0.1c
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18. May 20, 1998 -- BUG -- illegal use of side effects -- Magnus Holmgren
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In libpng-1.0.1b several illegal uses of side effects were
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introduced while tuning loops in pngrutil.c; also one in pngtrans.c.
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STATUS:
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Fixed in libpng-1.0.1d
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19. May 20, 1998 -- ENHANCEMENT -- script for making DLL -- Bob Dellaca
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Bob Dellaca contributed script for making PNG DLL on Borland C++ 4.5
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STATUS:
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Added to distribution in libpng-1.0.1d
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20. May 26, 1998 -- BUG -- png_do_gamma is skipped -- Magnus Holmgren
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When a background color is defined for a truecolor image, but no
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transparent color is defined, gamma correction is not done.
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The test in pngrtran should include " && !png_ptr->trans_values"
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STATUS:
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Fixed in libpng-1.0.1e
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3
README
3
README
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@ -1,4 +1,4 @@
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README for libpng 1.0.1e - June 6, 1998 (shared library 2.1)
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README for libpng 1.0.2 - June 14, 1998 (shared library 2.1)
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See the note about version numbers near the top of png.h
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See INSTALL for instructions on how to install libpng.
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@ -173,6 +173,7 @@ Files in this distribution:
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build.bat => MS-DOS batch file for Borland compiler
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makefile.dj2 => DJGPP 2 makefile
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makefile.msc => Microsoft C makefile
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makefile.w32 => makefile for Microsoft Visual C++ 4.0 and later
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makefile.tc3 => Turbo C 3.0 makefile
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makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def)
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makefile.wat => Watcom 10a+ Makefile, 32-bit flat memory model
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12
libpng.3
12
libpng.3
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@ -1,6 +1,6 @@
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.TH LIBPNG 3 "June 6, 1998"
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.TH LIBPNG 3 "June 14, 1998"
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.SH NAME
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libpng \- Portable Network Graphics (PNG) Reference Library 1.0.1e - June 6, 1998
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libpng \- Portable Network Graphics (PNG) Reference Library 1.0.2 - June 14, 1998
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.SH SYNOPSIS
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#include <png.h>
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@ -414,7 +414,7 @@ Following is a copy of the libpng.txt file that accompanies libpng.
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.SH LIBPNG.TXT
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libpng.txt - A description on how to use and modify libpng
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libpng version 1.0.1e - June 6, 1998
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libpng version 1.0.2 - June 14, 1998
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Updated and distributed by Glenn Randers-Pehrson
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<randeg@alumni.rpi.edu>
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Copyright (c) 1998, Glenn Randers-Pehrson
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@ -1417,8 +1417,8 @@ png_infop info_ptr;
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new_row);
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/* where old_row is what was displayed for
|
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previous rows. Note that the first pass
|
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(pass == 0, really) will completely cover
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previously for the row. Note that the first
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pass (pass == 0, really) will completely cover
|
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the old row, so the rows do not have to be
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initialized. After the first pass (and only
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for interlaced images), you will have to pass
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@ -2413,7 +2413,7 @@ possible without all of you.
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Thanks to Frank J. T. Wojcik for helping with the documentation.
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Libpng version 1.0.1e - June 6, 1998:
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Libpng version 1.0.2 - June 14, 1998:
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Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
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Currently maintained by Glenn Randers-Pehrson (randeg@alumni.rpi.edu).
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@ -1,6 +1,6 @@
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libpng.txt - A description on how to use and modify libpng
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libpng version 1.0.1e - June 6, 1998
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libpng version 1.0.2 - June 14, 1998
|
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Updated and distributed by Glenn Randers-Pehrson
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<randeg@alumni.rpi.edu>
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Copyright (c) 1998, Glenn Randers-Pehrson
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@ -1003,8 +1003,8 @@ png_infop info_ptr;
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new_row);
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/* where old_row is what was displayed for
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previous rows. Note that the first pass
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(pass == 0, really) will completely cover
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previously for the row. Note that the first
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pass (pass == 0, really) will completely cover
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the old row, so the rows do not have to be
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initialized. After the first pass (and only
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for interlaced images), you will have to pass
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|
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@ -1,6 +1,6 @@
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.TH LIBPNGPF 3 "June 6, 1998"
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.TH LIBPNGPF 3 "June 14, 1998"
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.SH NAME
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libpng \- Portable Network Graphics (PNG) Reference Library 1.0.1e - June 6, 1998
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libpng \- Portable Network Graphics (PNG) Reference Library 1.0.2 - June 14, 1998
|
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(private functions)
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.SH SYNOPSIS
|
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#include <png.h>
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|
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2
png.5
2
png.5
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@ -1,4 +1,4 @@
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.TH PNG 5 "June 6, 1998"
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.TH PNG 5 "June 14, 1998"
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.SH NAME
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png \- Portable Network Graphics (PNG) format
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.SH DESCRIPTION
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4
png.c
4
png.c
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* png.c - location for general purpose libpng functions
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -15,7 +15,7 @@
|
|||
/* Version information for C files. This had better match the version
|
||||
* string defined in png.h.
|
||||
*/
|
||||
char png_libpng_ver[12] = "1.0.1e";
|
||||
char png_libpng_ver[12] = "1.0.2";
|
||||
|
||||
/* Place to hold the signature string for a PNG file. */
|
||||
png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
|
||||
|
|
|
|||
4
png.h
4
png.h
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* png.h - header file for PNG reference library
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see the COPYRIGHT NOTICE below.
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -117,7 +117,7 @@ extern "C" {
|
|||
*/
|
||||
|
||||
/* Version information for png.h - this should match the version in png.c */
|
||||
#define PNG_LIBPNG_VER_STRING "1.0.1e"
|
||||
#define PNG_LIBPNG_VER_STRING "1.0.2"
|
||||
|
||||
/* Careful here. At one time, Guy wanted to use 082, but that would be octal.
|
||||
* We must not include leading zeros.
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngconf.h - machine configurable file for libpng
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngerror.c - stub functions for i/o and memory allocation
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -130,7 +130,7 @@ png_default_error(png_structp png_ptr, png_const_charp message)
|
|||
|
||||
/* This function is called when there is a warning, but the library thinks
|
||||
* it can continue anyway. Replacement functions don't have to do anything
|
||||
* here if you don't want to. In the default configuration, png_ptr is
|
||||
* here if you don't want them to. In the default configuration, png_ptr is
|
||||
* not used, but it is passed in case it may be useful.
|
||||
*/
|
||||
static void
|
||||
|
|
|
|||
2
pngget.c
2
pngget.c
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngget.c - retrieval of values from info struct
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
|
|||
8
pngmem.c
8
pngmem.c
|
|
@ -1,15 +1,17 @@
|
|||
|
||||
/* pngmem.c - stub functions for memory allocation
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
* Copyright (c) 1998, Glenn Randers-Pehrson
|
||||
*
|
||||
* This file provides a location for all memory allocation. Users who
|
||||
* need special memory handling are expected to modify the code in this file
|
||||
* to meet their needs. See the instructions at each function.
|
||||
* need special memory handling are expected to supply replacement
|
||||
* functions for png_malloc() and png_free(), and to use
|
||||
* png_create_read_struct_2() and png_create_write_struct_2() to
|
||||
* identify the replacement functions.
|
||||
*/
|
||||
|
||||
#define PNG_INTERNAL
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngpread.c - read a png file in push mode
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -77,8 +77,9 @@ png_process_some_data(png_structp png_ptr, png_infop info_ptr)
|
|||
|
||||
/* Read any remaining signature bytes from the stream and compare them with
|
||||
* the correct PNG signature. It is possible that this routine is called
|
||||
* with bytes already read from the signature, whether because they have been
|
||||
* checked by the calling application, or from multiple calls to this routine.
|
||||
* with bytes already read from the signature, either because they have been
|
||||
* checked by the calling application, or because of multiple calls to this
|
||||
* routine.
|
||||
*/
|
||||
void
|
||||
png_push_read_sig(png_structp png_ptr, png_infop info_ptr)
|
||||
|
|
@ -1116,7 +1117,7 @@ void
|
|||
png_progressive_combine_row (png_structp png_ptr,
|
||||
png_bytep old_row, png_bytep new_row)
|
||||
{
|
||||
if (new_row != NULL)
|
||||
if (new_row != NULL) /* new_row must == png_ptr->row_buf here. */
|
||||
png_combine_row(png_ptr, old_row, png_pass_dsp_mask[png_ptr->pass]);
|
||||
}
|
||||
|
||||
|
|
|
|||
10
pngread.c
10
pngread.c
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngread.c - read a PNG file
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -281,7 +281,7 @@ png_read_update_info(png_structp png_ptr, png_infop info_ptr)
|
|||
|
||||
/* Initialize palette, background, etc, after transformations
|
||||
* are set, but before any reading takes place. This allows
|
||||
* the user to obtail a gamma corrected palette, for example.
|
||||
* the user to obtain a gamma-corrected palette, for example.
|
||||
* If the user doesn't call this, we will do it ourselves.
|
||||
*/
|
||||
void
|
||||
|
|
@ -530,7 +530,7 @@ png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row)
|
|||
* not called png_set_interlace_handling(), the display_row buffer will
|
||||
* be ignored, so pass NULL to it.
|
||||
*
|
||||
* [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.1e.
|
||||
* [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.2.
|
||||
*/
|
||||
|
||||
void
|
||||
|
|
@ -570,7 +570,7 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
|
|||
}
|
||||
|
||||
/* Read the entire image. If the image has an alpha channel or a tRNS
|
||||
* chunk, and you have called png_handle_alpha(), you will need to
|
||||
* chunk, and you have called png_handle_alpha()[*], you will need to
|
||||
* initialize the image to the current image that PNG will be overlaying.
|
||||
* We set the num_rows again here, in case it was incorrectly set in
|
||||
* png_read_start_row() by a call to png_read_update_info() or
|
||||
|
|
@ -578,6 +578,8 @@ png_read_rows(png_structp png_ptr, png_bytepp row,
|
|||
* prior to either of these functions like it should have been. You can
|
||||
* only call this function once. If you desire to have an image for
|
||||
* each pass of a interlaced image, use png_read_rows() instead.
|
||||
*
|
||||
* [*] png_handle_alpha() does not exist yet, as of libpng version 1.0.2.
|
||||
*/
|
||||
void
|
||||
png_read_image(png_structp png_ptr, png_bytepp image)
|
||||
|
|
|
|||
2
pngrio.c
2
pngrio.c
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngrio.c - functions for data input
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngrtran.c - transforms the data in a row for PNG readers
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -523,7 +523,7 @@ png_set_gamma(png_structp png_ptr, double scrn_gamma, double file_gamma)
|
|||
|
||||
#if defined(PNG_READ_EXPAND_SUPPORTED)
|
||||
/* Expand paletted images to rgb, expand grayscale images of
|
||||
* less then 8 bit depth to 8 bit depth, and expand tRNS chunks
|
||||
* less than 8 bit depth to 8 bit depth, and expand tRNS chunks
|
||||
* to alpha channels.
|
||||
*/
|
||||
void
|
||||
|
|
@ -2819,7 +2819,7 @@ png_do_background(png_row_infop row_info, png_bytep row,
|
|||
|
||||
#if defined(PNG_READ_GAMMA_SUPPORTED)
|
||||
/* Gamma correct the image, avoiding the alpha channel. Make sure
|
||||
* you do this after you deal with the trasparency issue on grayscale
|
||||
* you do this after you deal with the transparency issue on grayscale
|
||||
* or rgb images. If your bit depth is 8, use gamma_table, if it
|
||||
* is 16, use gamma_16_table and gamma_shift. Build these with
|
||||
* build_gamma_table().
|
||||
|
|
|
|||
10
pngrutil.c
10
pngrutil.c
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngrutil.c - utilities to read a PNG file
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -1466,13 +1466,13 @@ png_check_chunk_name(png_structp png_ptr, png_bytep chunk_name)
|
|||
}
|
||||
}
|
||||
|
||||
/* Combines the row recently read in with the previous row.
|
||||
This routine takes care of alpha and transparency if requested.
|
||||
/* Combines the row recently read in with the existing pixels in the
|
||||
row. This routine takes care of alpha and transparency if requested.
|
||||
This routine also handles the two methods of progressive display
|
||||
of interlaced images, depending on the mask value.
|
||||
The mask value describes which pixels are to be combined with
|
||||
the row. The pattern always repeats every 8 pixels, so just 8
|
||||
bits are needed. A one indicates the pixels is to be combined,
|
||||
bits are needed. A one indicates the pixel is to be combined,
|
||||
a zero indicates the pixel is to be skipped. This is in addition
|
||||
to any alpha or transparency value associated with the pixel. If
|
||||
you want all pixels to be combined, pass 0xff (255) in mask. */
|
||||
|
|
@ -2156,7 +2156,7 @@ png_read_finish_row(png_structp png_ptr)
|
|||
if (!(png_ptr->num_rows))
|
||||
continue;
|
||||
}
|
||||
if (png_ptr->transformations & PNG_INTERLACE)
|
||||
else /* if (png_ptr->transformations & PNG_INTERLACE) */
|
||||
break;
|
||||
} while (png_ptr->iwidth == 0);
|
||||
|
||||
|
|
|
|||
2
pngset.c
2
pngset.c
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngset.c - storage of image information into info struct
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngtest.c - a simple test program to test libpng
|
||||
*
|
||||
* libpng 1.0.1e -June 6, 1998
|
||||
* libpng 1.0.2 -June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -13,7 +13,7 @@
|
|||
* properly. It does not currently test all of the transforms, although
|
||||
* it probably should.
|
||||
*
|
||||
* The program will fail in certain legitimate cases:
|
||||
* The program will report "FAIL" in certain legitimate cases:
|
||||
* 1) when the compression level or filter selection method is changed.
|
||||
* 2) when the chunk size is not 8K.
|
||||
* 3) unknown ancillary chunks exist in the input file.
|
||||
|
|
@ -39,7 +39,7 @@
|
|||
|
||||
#if defined(PNG_TIME_RFC1123_SUPPORTED)
|
||||
static int tIME_chunk_present=0;
|
||||
static png_charp tIME_string = "no tIME chunk present in file";
|
||||
static char tIME_string[30] = "no tIME chunk present in file";
|
||||
#endif /* PNG_TIME_RFC1123_SUPPORTED */
|
||||
|
||||
int test_one_file PNGARG((PNG_CONST char *inname, PNG_CONST char *outname));
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngtrans.c - transforms the data in a row (used by both readers and writers)
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -130,7 +130,7 @@ png_set_invert_mono(png_structp png_ptr)
|
|||
png_ptr->transformations |= PNG_INVERT_MONO;
|
||||
}
|
||||
|
||||
/* invert monocrome grayscale data */
|
||||
/* invert monochrome grayscale data */
|
||||
void
|
||||
png_do_invert(png_row_infop row_info, png_bytep row)
|
||||
{
|
||||
|
|
|
|||
4
pngwio.c
4
pngwio.c
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngwio.c - functions for data output
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -22,7 +22,7 @@
|
|||
writes to a file pointer. Note that this routine sometimes gets called
|
||||
with very small lengths, so you should implement some kind of simple
|
||||
buffering if you are using unbuffered writes. This should never be asked
|
||||
to write more then 64K on a 16 bit machine. */
|
||||
to write more than 64K on a 16 bit machine. */
|
||||
|
||||
void
|
||||
png_write_data(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngwrite.c - general routines to write a PNG file
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -15,7 +15,7 @@
|
|||
/* Writes all the PNG information. This is the suggested way to use the
|
||||
* library. If you have a new chunk to add, make a function to write it,
|
||||
* and put it in the correct location here. If you want the chunk written
|
||||
* after the image data, put it in png_write_end(). I strongly encurage
|
||||
* after the image data, put it in png_write_end(). I strongly encourage
|
||||
* you to supply a PNG_INFO_ flag, and check info_ptr->valid before writing
|
||||
* the chunk, as that will keep the code from breaking if you want to just
|
||||
* write a plain PNG file. If you have long comments, I suggest writing
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngwtran.c - transforms the data in a row for PNG writers
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -11,7 +11,7 @@
|
|||
#define PNG_INTERNAL
|
||||
#include "png.h"
|
||||
|
||||
/* Transform the data according to the users wishes. The order of
|
||||
/* Transform the data according to the user's wishes. The order of
|
||||
* transformations is significant.
|
||||
*/
|
||||
void
|
||||
|
|
|
|||
|
|
@ -1,7 +1,7 @@
|
|||
|
||||
/* pngwutil.c - utilities to write a PNG file
|
||||
*
|
||||
* libpng 1.0.1e - June 6, 1998
|
||||
* libpng 1.0.2 - June 14, 1998
|
||||
* For conditions of distribution and use, see copyright notice in png.h
|
||||
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
|
||||
* Copyright (c) 1996, 1997 Andreas Dilger
|
||||
|
|
@ -273,7 +273,7 @@ png_write_IHDR(png_structp png_ptr, png_uint_32 width, png_uint_32 height,
|
|||
}
|
||||
|
||||
/* write the palette. We are careful not to trust png_color to be in the
|
||||
* correct order for PNG, so people can redefine it to any convient
|
||||
* correct order for PNG, so people can redefine it to any convenient
|
||||
* structure.
|
||||
*/
|
||||
void
|
||||
|
|
@ -835,7 +835,7 @@ png_write_zTXt(png_structp png_ptr, png_charp key, png_charp text,
|
|||
png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
|
||||
png_ptr->zstream.next_out = png_ptr->zbuf;
|
||||
}
|
||||
/* continue until we don't have anymore to compress */
|
||||
/* continue until we don't have any more to compress */
|
||||
} while (png_ptr->zstream.avail_in);
|
||||
|
||||
/* finish the compression */
|
||||
|
|
|
|||
|
|
@ -29,7 +29,7 @@ RANLIB=ranlib
|
|||
# read libpng.txt or png.h to see why PNGMAJ is 2. You should not
|
||||
# have to change it.
|
||||
PNGMAJ = 2
|
||||
PNGMIN = 1.0.1e
|
||||
PNGMIN = 1.0.2
|
||||
PNGVER = $(PNGMAJ).$(PNGMIN)
|
||||
|
||||
# where make install puts libpng.a, libpng.so*, and png.h
|
||||
|
|
|
|||
|
|
@ -29,7 +29,7 @@ RANLIB=echo
|
|||
# read libpng.txt or png.h to see why PNGMAJ is 2. You should not
|
||||
# have to change it.
|
||||
PNGMAJ = 2
|
||||
PNGMIN = 1.0.1e
|
||||
PNGMIN = 1.0.2
|
||||
PNGVER = $(PNGMAJ).$(PNGMIN)
|
||||
|
||||
# where make install puts libpng.a, libpng.so*, and png.h
|
||||
|
|
|
|||
|
|
@ -22,7 +22,7 @@ RANLIB=echo
|
|||
# read libpng.txt or png.h to see why PNGMAJ is 2. You should not
|
||||
# have to change it.
|
||||
PNGMAJ = 2
|
||||
PNGMIN = 1.0.1e
|
||||
PNGMIN = 1.0.2
|
||||
PNGVER = $(PNGMAJ).$(PNGMIN)
|
||||
|
||||
# where make install puts libpng.a, libpng.so*, and png.h
|
||||
|
|
|
|||
|
|
@ -0,0 +1,85 @@
|
|||
# makefile for libpng
|
||||
# Copyright (C) 1998 Tim Wegner
|
||||
# For conditions of distribution and use, see copyright notice in png.h
|
||||
# Assumes that zlib.lib, zconf.h, and zlib.h have been copied to ..\zlib
|
||||
# To use, do "nmake /f scripts\makefile.w32"
|
||||
|
||||
# ------------- Microsoft Visual C++ 4.0 and later -------------
|
||||
MODEL=-
|
||||
CFLAGS=-Ox -GA3s -nologo -W3 -I..\zlib
|
||||
|
||||
CC=cl
|
||||
LD=link
|
||||
LDFLAGS=
|
||||
O=.obj
|
||||
|
||||
#uncomment next to put error messages in a file
|
||||
ERRFILE= >> pngerrs
|
||||
|
||||
# variables
|
||||
OBJS1 = png$(O) pngset$(O) pngget$(O) pngrutil$(O) pngtrans$(O) pngwutil$(O)
|
||||
OBJS2 = pngmem$(O) pngpread$(O) pngread$(O) pngerror$(O) pngwrite$(O)
|
||||
OBJS3 = pngrtran$(O) pngwtran$(O) pngrio$(O) pngwio$(O)
|
||||
|
||||
all: libpng.lib
|
||||
|
||||
png$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngset$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngget$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngread$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngpread$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngrtran$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngrutil$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngerror$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngmem$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngrio$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngwio$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngtest$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngtrans$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngwrite$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngwtran$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
pngwutil$(O): png.h pngconf.h
|
||||
$(CC) -c $(CFLAGS) $*.c $(ERRFILE)
|
||||
|
||||
libpng.lib: $(OBJS1) $(OBJS2) $(OBJS3)
|
||||
del libpng.lib
|
||||
lib /OUT:libpng.lib $(OBJS1) $(OBJS2) $(OBJS3)
|
||||
|
||||
pngtest.exe: pngtest.obj libpng.lib
|
||||
$(LD) $(LDFLAGS) pngtest.obj libpng.lib ..\zlib\zlib.lib /OUT:pngtest.exe /SUBSYSTEM:CONSOLE
|
||||
|
||||
test: pngtest.exe
|
||||
pngtest
|
||||
|
||||
# End of makefile for libpng
|
||||
|
||||
|
|
@ -3,7 +3,7 @@ unit pngdef;
|
|||
interface
|
||||
|
||||
const
|
||||
PNG_LIBPNG_VER_STRING = '1.0.1e';
|
||||
PNG_LIBPNG_VER_STRING = '1.0.2';
|
||||
PNG_LIBPNG_VER = 10001;
|
||||
|
||||
type
|
||||
|
|
|
|||
Reference in New Issue