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| Libpng 1.0.6 - March 21, 2000 |
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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 (1.0.5): |
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| Added contrib/pngsuite and contrib/pngminus (Willem van Schaik) |
| Fixed a typo in the png_set_sRGB() function call in example.c (Jan Nijtmans) |
| Further optimization and bugfix of pngvcrd.c |
| Revised pngset.c so that it does not allocate or free memory in the user's |
| text_ptr structure. Instead, it makes its own copy. |
| Added code in pngwrite.c to free info_ptr->text[i].key to stop a memory leak. |
| Created separate write_end_info_struct in pngtest.c for a more severe test. |
| Moved PNG_FLAG_HAVE_CHUNK_HEADER, PNG_FLAG_BACKGROUND_IS_GRAY and |
| PNG_FLAG_WROTE_tIME from flags to mode. |
| Added png_write_info_before_PLTE() function. |
| Fixed some typecasting in contrib/gregbook/*.c |
| Updated scripts/makevms.com (Martin Zinser) |
| Moved png_get_header_version from png.h to png.c, to accomodate ansi2knr. |
| Removed all global arrays (according to PNG_NO_GLOBAL_ARRAYS macro), to |
| accomodate making DLL's: Moved usr_png_ver from global variable to function |
| png_get_header_ver() in png.c. Moved png_sig to png_sig_bytes in png.c and |
| eliminated use of png_sig in pngwutil.c. Moved the various png_CHNK arrays |
| into local arrays. Eliminated use of global png_pass arrays. Declared the |
| png_CHNK and png_pass arrays to be "const". Made the global arrays |
| available to applications when PNG_NO_GLOBAL_ARRAYS is not defined or |
| when PNG_USE_GLOBAL_ARRAYS is defined. Made available to applications a |
| macro "PNG_USE_LOCAL_ARRAYS". |
| Changed the PNG_sRGB_INTENT macros in png.h to be consistent with PNG-1.2. |
| Change PNG_SRGB_INTENT to PNG_sRGB_INTENT in libpng.txt and libpng.3 |
| Added PNG_EXPORT_VAR macro to accommodate making DLL's. |
| Refactored the inflate/deflate support to make adding new chunks with |
| trailing compressed parts easier in the future (Eric S. Raymond). |
| Added iCCP, iTXt, sCAL, and sPLT support; added "lang", "lang_key", and |
| itxt_length" members to the png_text structure (Eric S. Raymond, Glenn R-P) |
| Changed png_get_oFFs() and png_set_oFFs() to use signed rather than unsigned |
| offsets (Eric S. Raymond). |
| Combined PNG_READ_cHNK_SUPPORTED and PNG_WRITE_cHNK_SUPPORTED macros into |
| PNG_cHNK_SUPPORTED and combined the three types of PNG_text_SUPPORTED |
| macros, leaving the separate macros also available. |
| Removed comments on #endifs at the end of many short, non-nested #if-blocks. |
| Changed makefile.solaris to issue a warning about potential problems when |
| the ucb "ld" is in the path ahead of the ccs "ld". |
| Removed "- [date]" from the "synopsis" line in libpng.3 and libpngpf.3. |
| Added code in pngwrite.c to work around a newly discovered zlib bug. |
| Unknown chunk handling is now supported (Eric S. Raymond). |
| Option to eliminate all floating point support was added. Some new |
| fixed-point functions such as png_set_gAMA_fixed() were added. |
| Added new type "png_fixed_point" for integers that hold float*100000 values |
| Added many parentheses, e.g., "if (a && b & c)" becomes "if (a && (b & c))" |
| Added png_handle_as_unknown() |
| Added chunk_list and num_chunk_list members of png_ptr. |
| Define png_get_int_32 when oFFs chunk is supported as well as when pCAL is. |
| Added functions png_set_read_user_chunk_fn() and png_get_user_chunk_ptr() |
| for setting a callback function to handle unknown chunks and for |
| retrieving the associated user pointer (Glenn). |
| Added png_free_data() function. |
| Added high-level functions png_read_png() and png_write_png() (ESR). |
| Renamed pngdll.mak to makefile.bd32 |
| Cosmetic changes in pngtest.c |
| Fixed pngvcrd.c bug by pushing/popping registers in mmxsupport (Bruce Oberg) |
| Revised makefile.gcmmx |
| Fixed a bug in pngrtran.c that improperly expanded the background color. |
| Return *num_text=0 from png_get_text() when appropriate, and fix documentation |
| of png_get_text() in libpng.txt/libpng.3. |
| Added PNG_SETJMP_SUPPORTED, PNG_SETJMP_NOT_SUPPORTED, and PNG_ABORT() and |
| "png_jmpbuf()" macros to pngconf.h, to help people migrate to the new error |
| handler that's planned for the next libpng release, and changed example.c, |
| pngtest.c, and contrib programs to use this macro. |
| Revised some of the DLL-export macros in pngconf.h (Greg Roelofs) |
| Fixed some mistakes in the unused and undocumented INCH_CONVERSIONS functions |
| in pngget.c |
| Updated makefile.linux and makefile.gccmmx to make directories conditionally. |
| Increased precision of rgb_to_gray calculations from 8 to 15 bits and |
| added png_set_rgb_to_gray_fixed() function. |
| Added makefile.bc32 (32-bit Borland C++, C mode) |
| Updated references to the zlib home page, which has moved to freesoftware.com. |
| Corrected bugs in documentation regarding png_read_row() and png_write_row(). |
| Renamed makefile.borland,turboc3 back to makefile.bor,tc3 as in version 1.0.3, |
| revised borland makefiles; added makefile.ibmvac3 and makefile.gcc (Cosmin) |
| Added makefile.sggcc (SGI IRIX with gcc) |
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| Send comments/corrections/commendations to |
| png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu |
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| Glenn R-P |
