104 lines
6.2 KiB
Plaintext
104 lines
6.2 KiB
Plaintext
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Libpng 1.0.7 - July 1, 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 (1.0.6):
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Changed sprintf() to strcpy() in png_write_sCAL_s() to work without STDIO
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Added data_length parameter to png_decompress_chunk() function
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Revised documentation to remove reference to abandoned png_free_chnk functions
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Fixed an error in png_rgb_to_gray_fixed()
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Revised example.c, usage of png_destroy_write_struct().
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Renamed makefile.ibmvac3 to makefile.ibmc, added libpng.icc IBM project file
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Added a check for info_ptr->free_me&PNG_FREE_TEXT when free'ing text in png.c
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Simplify png_sig_bytes() function to remove use of non-ISO-C strdup().
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Added png_data_freer() function.
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In the code that checks for over-length tRNS chunks, added check of
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info_ptr->num_trans as well as png_ptr->num_trans (Matthias Benckmann)
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Check for existing data and free it if the free_me flag is set, in png_set_*()
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and png_handle_*().
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Only define PNG_WEIGHTED_FILTERS_SUPPORTED when PNG_FLOATING_POINT_SUPPORTED
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is defined.
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Changed several instances of PNG_NO_CONSOLE_ID to PNG_NO_STDIO in pngrutil.c
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and mentioned the purposes of the two macros in libpng.txt/libpng.3.
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Revised png_set_iCCP() and png_set_rows() to avoid prematurely freeing data.
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Add checks in png_set_text() for NULL members of the input text structure.
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Removed superfluous prototype for png_set_itxt from png.h
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Removed "else" from pngread.c, after png_error(), and changed "0" to "length".
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Changed several png_errors about malformed ancillary chunks to png_warnings.
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Added png_pass-* arrays to pnggccrd.c when PNG_USE_LOCAL_ARRAYS is defined.
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Relocated paragraph about png_set_background() in libpng.3/libpng.txt
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and other revisions (Matthias Benckmann)
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Relocated info_ptr->free_me to restore binary compatibility with libpng-1.0.5
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(breaks compatibility with libpng-1.0.6).
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Relocated info_ptr->free_me, png_ptr->free_me, and other info_ptr and
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png_ptr members to restore binary compatibility with libpng-1.0.5
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(breaks compatibility with libpng-1.0.6).
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Rearranged some members at the end of png_info and png_struct, to put
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unknown_chunks_num and free_me within the original size of the png_structs
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and free_me, png_read_user_fn, and png_free_fn within the original png_info,
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because some old applications allocate the structs directly instead of
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using png_create_*().
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Added documentation of user memory functions in libpng.txt/libpng.3
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Modified png_read_png so that it will use user_allocated row_pointers
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if present, unless free_me directs that it be freed, and added description
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of the use of png_set_rows() and png_get_rows() in libpng.txt/libpng.3.
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Added PNG_LEGACY_SUPPORTED macro, and #ifdef out all new (since version
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1.00) members of png_struct and png_info, to regain binary compatibility
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when you define this macro. Capabilities lost in this event
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are user transforms (new in version 1.0.0),the user transform pointer
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(new in version 1.0.2), rgb_to_gray (new in 1.0.5), iCCP, sCAL, sPLT,
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the high-level interface, and unknown chunks support (all new in 1.0.6).
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This was necessary because of old applications that allocate the structs
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directly as authors were instructed to do in libpng-0.88 and earlier,
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instead of using png_create_*().
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Added makefile.intel and updated makefile.watcom (Pawel Mrochen)
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Overloaded png_read_init() and png_write_init() with macros that convert
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calls to png_read_init_2() or png_write_init_2() that check the version
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and structure sizes.
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Made PNG_NO_ITXT_SUPPORTED the default setting, to avoid memory overrun
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when old applications fill the info_ptr->text structure directly.
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Added PNGAPI macro, and added it to the definitions of all exported functions.
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Relocated version macro definitions ahead of the includes of zlib.h and
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pngconf.h in png.h.
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Made PNG_NO_CONSOLE_IO the default condition when PNG_BUILD_DLL is defined.
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Use MSC _RPTn debugging instead of fprintf if _MSC_VER is defined.
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Added png_access_version_number() function.
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Check for mask&PNG_FREE_CHNK (for TEXT, SCAL, PCAL) in png_free_data().
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Expanded libpng.3/libpng.txt information about png_data_freer().
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Changed pnggccrd.c and pngvcrd.c to handle bad adaptive filter types as
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warnings instead of errors, as pngrutil.c does.
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Set the PNG_INFO_IDAT valid flag in png_set_rows() so png_write_png()
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will actually write IDATs.
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Made the default PNG_USE_LOCAL_ARRAYS depend on PNG_DLL instead of WIN32.
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Make png_free_data() ignore its final parameter when freeing data that can
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have multiple instances (text, sPLT, unknowns).
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Removed info_ptr->valid tests from png_free_data(), as in version 1.0.5.
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Added png_set_invalid() function.
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Fixed incorrect illustrations of png_destroy_write_struct() in example.c.
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Revised the deliberately erroneous Linux setjmp code in pngconf.h to produce
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fewer error messages.
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Set each pointer to NULL after freeing it in png_free_data().
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Worked around a problem in pngconf.h; AIX's strings.h defines an "index"
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macro that conflicts with libpng's png_color_16.index. (Dimitri Papadapoulos)
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Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer
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indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler.
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Added a check for overlength PLTE chunk in pngrutil.c.
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Added PNG_NO_POINTER_INDEXING macro to use array-indexing instead of pointer
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indexing in pngrutil.c and pngwutil.c to accommodate a buggy compiler.
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Added a warning in png_decompress_chunk() when it runs out of data.
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Revised the copyright/disclaimer/license notice.
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Corrected the definition of PNG_TRANSFORM_INVERT_ALPHA (0x0400 not 0x0200)
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Added PNG_USE_DLL macro.
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Added "msvc" and contrib/msvctest directories with MSVC++ project files
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(Simon-Pierre Cadieux) and contrib/visupng directory (Willem van Schaik).
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Removed leading underscores from "_PNG_H" and "_PNG_SAVE_BSD_SOURCE" macros.
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Fixed bugs in pngwrite.c and pngwutil.c that prevented writing iCCP chunks.
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Revised the definition of "trans_values" in libpng.3/libpng.txt
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Send comments/corrections/commendations to
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png-implement@ccrc.wustl.edu or to randeg@alum.rpi.edu
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Glenn R-P
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