[devel] Updated comments that mention 1.5.3; changed them to 1.5.4.
This commit is contained in:
Glenn Randers-Pehrson
parent
b0791f75ad
commit
ef217b76a3
2
png.c
2
png.c
@ -2385,7 +2385,7 @@ png_build_gamma_table(png_structp png_ptr, int bit_depth)
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png_ptr->gamma_shift = shift;
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#ifdef PNG_16BIT_SUPPORTED
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/* NOTE: prior to 1.5.3 this test used to include PNG_BACKGROUND (now
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/* NOTE: prior to 1.5.4 this test used to include PNG_BACKGROUND (now
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* PNG_COMPOSE). This effectively smashed the background calculation for
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* 16-bit output because the 8-bit table assumes the result will be reduced
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* to 8 bits.
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5
png.h
5
png.h
@ -900,8 +900,9 @@ PNG_FUNCTION(void, (PNGCAPI *png_longjmp_ptr), PNGARG((jmp_buf, int)), typedef);
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#define PNG_TRANSFORM_STRIP_FILLER_AFTER 0x1000 /* write only */
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/* Added to libpng-1.4.0 */
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#define PNG_TRANSFORM_GRAY_TO_RGB 0x2000 /* read only */
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/* Added to libpng-1.5.3 */
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/* Added to libpng-1.5.4 */
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#define PNG_TRANSFORM_EXPAND_16 0x4000 /* read only */
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#define PNG_TRANSFORM_CHOP_16 0x8000 /* read only */
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/* Flags for MNG supported features */
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#define PNG_FLAG_MNG_EMPTY_PLTE 0x01
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@ -1404,7 +1405,7 @@ PNG_EXPORT(46, void, png_set_invert_mono, (png_structp png_ptr));
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#ifdef PNG_READ_BACKGROUND_SUPPORTED
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/* Handle alpha and tRNS by replacing with a background color. Prior to
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* libpng-1.5.3 this API must not be called before the PNG file header has been
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* libpng-1.5.4 this API must not be called before the PNG file header has been
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* read. Doing so will result in unexpected behavior and possible warnings or
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* errors if the PNG file contains a bKGD chunk.
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*/
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@ -507,7 +507,7 @@ png_default_error,(png_structp png_ptr, png_const_charp error_message),
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{
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#ifdef PNG_CONSOLE_IO_SUPPORTED
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#ifdef PNG_ERROR_NUMBERS_SUPPORTED
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/* Check on NULL only added in 1.5.3 */
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/* Check on NULL only added in 1.5.4 */
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if (error_message != NULL && *error_message == PNG_LITERAL_SHARP)
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{
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/* Strip "#nnnn " from beginning of error message. */
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16
pngpriv.h
16
pngpriv.h
@ -116,7 +116,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
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#endif
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/* If warnings or errors are turned off the code is disabled or redirected here.
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* From 1.5.3 functions have been added to allow very limited formatting of
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* From 1.5.4 functions have been added to allow very limited formatting of
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* error and warning messages - this code will also be disabled here.
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*/
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#ifdef PNG_WARNINGS_SUPPORTED
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@ -295,7 +295,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
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#define PNG_RGB_TO_GRAY_ERR 0x200000L
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#define PNG_RGB_TO_GRAY_WARN 0x400000L
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#define PNG_RGB_TO_GRAY 0x600000L /* two bits, RGB_TO_GRAY_ERR|WARN */
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#define PNG_ENCODE_ALPHA 0x800000L /* Added to libpng-1.5.3 */
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#define PNG_ENCODE_ALPHA 0x800000L /* Added to libpng-1.5.4 */
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#define PNG_ADD_ALPHA 0x1000000L /* Added to libpng-1.2.7 */
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#define PNG_EXPAND_tRNS 0x2000000L /* Added to libpng-1.2.9 */
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#define PNG_CHOP_16_TO_8 0x4000000L
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@ -325,9 +325,9 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
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#define PNG_FLAG_CRC_ANCILLARY_NOWARN 0x0200
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#define PNG_FLAG_CRC_CRITICAL_USE 0x0400
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#define PNG_FLAG_CRC_CRITICAL_IGNORE 0x0800
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#define PNG_FLAG_ASSUME_sRGB 0x1000 /* Added to libpng-1.5.3 */
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#define PNG_FLAG_OPTIMIZE_ALPHA 0x2000 /* Added to libpng-1.5.3 */
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#define PNG_FLAG_DETECT_UNINITIALIZED 0x4000 /* Added to libpng-1.5.3 */
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#define PNG_FLAG_ASSUME_sRGB 0x1000 /* Added to libpng-1.5.4 */
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#define PNG_FLAG_OPTIMIZE_ALPHA 0x2000 /* Added to libpng-1.5.4 */
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#define PNG_FLAG_DETECT_UNINITIALIZED 0x4000 /* Added to libpng-1.5.4 */
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#define PNG_FLAG_KEEP_UNKNOWN_CHUNKS 0x8000L
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#define PNG_FLAG_KEEP_UNSAFE_CHUNKS 0x10000L
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#define PNG_FLAG_LIBRARY_MISMATCH 0x20000L
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@ -338,7 +338,7 @@ typedef PNG_CONST png_uint_16p FAR * png_const_uint_16pp;
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/* 0x400000L unused */
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#define PNG_FLAG_BENIGN_ERRORS_WARN 0x800000L /* Added to libpng-1.4.0 */
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#define PNG_FLAG_ZTXT_CUSTOM_STRATEGY 0x1000000L /* 5 lines added */
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#define PNG_FLAG_ZTXT_CUSTOM_LEVEL 0x2000000L /* to libpng-1.5.3 */
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#define PNG_FLAG_ZTXT_CUSTOM_LEVEL 0x2000000L /* to libpng-1.5.4 */
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#define PNG_FLAG_ZTXT_CUSTOM_MEM_LEVEL 0x4000000L
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#define PNG_FLAG_ZTXT_CUSTOM_WINDOW_BITS 0x8000000L
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#define PNG_FLAG_ZTXT_CUSTOM_METHOD 0x10000000L
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@ -452,7 +452,7 @@ PNG_EXTERN png_fixed_point png_fixed PNGARG((png_structp png_ptr, double fp,
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#define PNG_tRNS PNG_CONST png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'}
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#define PNG_zTXt PNG_CONST png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'}
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/* Gamma values (new at libpng-1.5.3): */
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/* Gamma values (new at libpng-1.5.4): */
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#define PNG_GAMMA_MAC_OLD 151724 /* Assume '1.8' is really 2.2/1.45! */
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#define PNG_GAMMA_MAC_INVERSE 65909
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#define PNG_GAMMA_sRGB_INVERSE 45455
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@ -1133,7 +1133,7 @@ PNG_EXTERN png_charp png_format_number(png_const_charp start, png_charp end,
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#endif
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#ifdef PNG_WARNINGS_SUPPORTED
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/* New defines and members adding in libpng-1.5.3 */
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/* New defines and members adding in libpng-1.5.4 */
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# define PNG_WARNING_PARAMETER_SIZE 32
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# define PNG_WARNING_PARAMETER_COUNT 8
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@ -1292,6 +1292,9 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
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if (transforms & PNG_TRANSFORM_STRIP_16)
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png_set_strip_16(png_ptr);
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# ifdef PNG_READ_CHOP_16_TO_8_SUPPORTED
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/* Added at libpng-1.5.4. "chop_16" produces the same result that "strip_16"
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* did in earlier versions, while "strip_16" is now more accurate.
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*/
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else
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if (transforms & PNG_TRANSFORM_CHOP_16)
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png_set_chop_16(png_ptr);
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@ -1392,7 +1395,7 @@ png_read_png(png_structp png_ptr, png_infop info_ptr,
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png_set_gray_to_rgb(png_ptr);
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#endif
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/* Added at libpng-1.5.3 */
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/* Added at libpng-1.5.4 */
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#ifdef PNG_READ_EXPAND_16_SUPPORTED
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if (transforms & PNG_TRANSFORM_EXPAND_16)
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png_set_expand_16(png_ptr);
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36
pngrtran.c
36
pngrtran.c
@ -775,12 +775,12 @@ png_set_gamma_fixed(png_structp png_ptr, png_fixed_point scrn_gamma,
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if (png_ptr == NULL)
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return;
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/* New in libpng-1.5.3 - reserve particular negative values as flags. */
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/* New in libpng-1.5.4 - reserve particular negative values as flags. */
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scrn_gamma = translate_gamma_flags(png_ptr, scrn_gamma, 1/*screen*/);
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file_gamma = translate_gamma_flags(png_ptr, file_gamma, 0/*file*/);
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#if PNG_LIBPNG_VER >= 10600
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/* Checking the gamma values for being >0 was added in 1.5.3 along with the
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/* Checking the gamma values for being >0 was added in 1.5.4 along with the
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* premultiplied alpha support; this actually hides an undocumented feature
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* of the previous implementation which allowed gamma processing to be
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* disabled in background handling. There is no evidence (so far) that this
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@ -1155,7 +1155,7 @@ png_init_palette_transformations(png_structp png_ptr)
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static void /* PRIVATE */
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png_init_rgb_transformations(png_structp png_ptr)
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{
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/* Added to libpng-1.5.3: check the color type to determine whether there
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/* Added to libpng-1.5.4: check the color type to determine whether there
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* is any alpha or transparency in the image and simply cancel the
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* background and alpha mode stuff if there isn't.
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*/
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@ -1260,9 +1260,9 @@ png_init_read_transformations(png_structp png_ptr)
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*/
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#ifdef PNG_READ_GAMMA_SUPPORTED
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/* Prior to 1.5.3 these tests were performed from png_set_gamma, 1.5.3 adds
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/* Prior to 1.5.4 these tests were performed from png_set_gamma, 1.5.4 adds
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* png_set_alpha_mode and this is another source for a default file gamma so
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* the test needs to be performed later - here. In addition prior to 1.5.3
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* the test needs to be performed later - here. In addition prior to 1.5.4
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* the tests were repeated for the PALETTE color type here - this is no
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* longer necessary (and doesn't seem to have been necessary before.)
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*/
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@ -1287,7 +1287,7 @@ png_init_read_transformations(png_structp png_ptr)
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else if (png_ptr->screen_gamma != 0)
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/* The converse - assume the file matches the screen, note that this
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* perhaps undesireable default can (from 1.5.3) be changed by calling
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* perhaps undesireable default can (from 1.5.4) be changed by calling
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* png_set_alpha_mode (even if the alpha handling mode isn't required
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* or isn't changed from the default.)
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*/
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@ -1297,7 +1297,7 @@ png_init_read_transformations(png_structp png_ptr)
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/* Just in case the following prevents any processing - file and screen
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* are both assumed to be linear and there is no way to introduce a
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* third gamma value other than png_set_background with 'UNIQUE', and,
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* prior to 1.5.3
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* prior to 1.5.4
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*/
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png_ptr->screen_gamma = png_ptr->gamma = PNG_FP_1;
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@ -1358,12 +1358,12 @@ png_init_read_transformations(png_structp png_ptr)
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PNG_EXPAND_tRNS);
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png_ptr->flags &= ~PNG_FLAG_OPTIMIZE_ALPHA;
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/* Kill the tRNS chunk itself too. Prior to 1.5.3 this did not happen
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/* Kill the tRNS chunk itself too. Prior to 1.5.4 this did not happen
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* so transparency information would remain just so long as it wasn't
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* expanded. This produces unexpected API changes if the set of things
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* that do PNG_EXPAND_tRNS changes (perfectly possible given the
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* documentation - which says ask for what you want, accept what you
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* get.) This makes the behavior consistent from 1.5.3:
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* get.) This makes the behavior consistent from 1.5.4:
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*/
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png_ptr->num_trans = 0;
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}
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@ -1473,7 +1473,7 @@ png_init_read_transformations(png_structp png_ptr)
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* background support (see the comments in scripts/pnglibconf.dfa), this
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* allows pre-multiplication of the alpha channel to be implemented as
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* compositing on black. This is probably sub-optimal and has been done in
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* 1.5.3 betas simply to enable external critique and testing (i.e. to
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* 1.5.4 betas simply to enable external critique and testing (i.e. to
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* implement the new API quickly, without lots of internal changes.)
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*/
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@ -1492,7 +1492,7 @@ png_init_read_transformations(png_structp png_ptr)
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* the gamma tables will not be built even if composition is required on a
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* gamma encoded value.
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*
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* In 1.5.3 this is addressed below by an additional check on the individual
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* In 1.5.4 this is addressed below by an additional check on the individual
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* file gamma - if it is not 1.0 both RGB_TO_GRAY and COMPOSE need the
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* tables.
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*/
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@ -1860,7 +1860,7 @@ png_read_transform_info(png_structp png_ptr, png_infop info_ptr)
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#endif
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#ifdef PNG_READ_GAMMA_SUPPORTED
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/* The following used to be conditional on PNG_GAMMA (prior to 1.5.3),
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/* The following used to be conditional on PNG_GAMMA (prior to 1.5.4),
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* however it seems that the code in png_init_read_transformations, which has
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* been called before this from png_read_update_info->png_read_start_row
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* sometimes does the gamma transform and cancels the flag.
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@ -1969,7 +1969,7 @@ defined(PNG_READ_USER_TRANSFORM_SUPPORTED)
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info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, info_ptr->width);
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/* Adding in 1.5.3: cache the above value in png_struct so that we can later
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/* Adding in 1.5.4: cache the above value in png_struct so that we can later
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* check in png_rowbytes that the user buffer won't get overwritten. Note
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* that the field is not always set - if png_read_update_info isn't called
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* the application has to either not do any transforms or get the calculation
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@ -1994,15 +1994,15 @@ png_do_read_transformations(png_structp png_ptr)
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if (png_ptr->row_buf == NULL)
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{
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/* Prior to 1.5.3 this output row/pass where the NULL pointer is, but this
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/* Prior to 1.5.4 this output row/pass where the NULL pointer is, but this
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* error is incredibly rare and incredibly easy to debug without this
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* information.
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*/
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png_error(png_ptr, "NULL row buffer");
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}
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/* The following is debugging; prior to 1.5.3 the code was never compiled in;
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* in 1.5.3 PNG_FLAG_DETECT_UNINITIALIZED was added and the macro
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/* The following is debugging; prior to 1.5.4 the code was never compiled in;
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* in 1.5.4 PNG_FLAG_DETECT_UNINITIALIZED was added and the macro
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* PNG_WARN_UNINITIALIZED_ROW removed. In 1.5 the new flag is set only for
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* selected new APIs to ensure that there is no API change.
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*/
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@ -2011,7 +2011,7 @@ png_do_read_transformations(png_structp png_ptr)
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{
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/* Application has failed to call either png_read_start_image() or
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* png_read_update_info() after setting transforms that expand pixels.
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* This check added to libpng-1.2.19 (but not enabled until 1.5.3).
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* This check added to libpng-1.2.19 (but not enabled until 1.5.4).
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*/
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png_error(png_ptr, "Uninitialized row");
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}
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@ -2173,7 +2173,7 @@ png_do_read_transformations(png_structp png_ptr)
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#endif
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#ifdef PNG_READ_GRAY_TO_RGB_SUPPORTED
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/*NOTE: moved here in 1.5.3 (from much later in this list.) */
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/*NOTE: moved here in 1.5.4 (from much later in this list.) */
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if ((png_ptr->transformations & PNG_GRAY_TO_RGB) &&
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(png_ptr->mode & PNG_BACKGROUND_IS_GRAY))
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png_do_gray_to_rgb(&(png_ptr->row_info), png_ptr->row_buf + 1);
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@ -2679,7 +2679,7 @@ png_combine_row(png_structp png_ptr, png_bytep row, int mask)
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{
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png_debug(1, "in png_combine_row");
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/* Added in 1.5.3: the row_info should match the information returned by any
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/* Added in 1.5.4: the row_info should match the information returned by any
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* call to png_read_update_info at this point. Do not continue if we got
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* this wrong.
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*/
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10
pngstruct.h
10
pngstruct.h
@ -68,7 +68,7 @@ struct png_struct_def
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uInt zbuf_size; /* size of zbuf (typically 65536) */
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#ifdef PNG_WRITE_SUPPORTED
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/* Added in 1.5.3: state to keep track of whether the zstream has been
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/* Added in 1.5.4: state to keep track of whether the zstream has been
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* initialized and if so whether it is for IDAT or some other chunk.
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*/
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#define PNG_ZLIB_UNINITIALIZED 0
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@ -78,7 +78,7 @@ struct png_struct_def
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#define PNG_ZLIB_IN_USE 4 /* a flag value */
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png_uint_32 zlib_state; /* State of zlib initialization */
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/* End of material added at libpng 1.5.3 */
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/* End of material added at libpng 1.5.4 */
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int zlib_level; /* holds zlib compression level */
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int zlib_method; /* holds zlib compression method */
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@ -86,7 +86,7 @@ struct png_struct_def
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int zlib_mem_level; /* holds zlib compression memory level */
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int zlib_strategy; /* holds zlib compression strategy */
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#endif
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/* Added at libpng 1.5.3 */
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/* Added at libpng 1.5.4 */
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#if defined(PNG_WRITE_COMPRESSED_TEXT_SUPPORTED) || \
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defined(PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED)
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int zlib_text_level; /* holds zlib compression level */
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@ -95,7 +95,7 @@ struct png_struct_def
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int zlib_text_mem_level; /* holds zlib compression memory level */
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int zlib_text_strategy; /* holds zlib compression strategy */
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#endif
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/* End of material added at libpng 1.5.3 */
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/* End of material added at libpng 1.5.4 */
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png_uint_32 width; /* width of image in pixels */
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png_uint_32 height; /* height of image in pixels */
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@ -111,7 +111,7 @@ struct png_struct_def
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png_bytep avg_row; /* buffer to save "avg" row when filtering */
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png_bytep paeth_row; /* buffer to save "Paeth" row when filtering */
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png_row_info row_info; /* used for transformation routines */
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png_size_t info_rowbytes; /* Added in 1.5.3: cache of updated row bytes */
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png_size_t info_rowbytes; /* Added in 1.5.4: cache of updated row bytes */
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png_uint_32 idat_size; /* current IDAT size for read */
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png_uint_32 crc; /* current chunk CRC value */
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@ -918,7 +918,7 @@ test_one_file(PNG_CONST char *inname, PNG_CONST char *outname)
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#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
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/* Normally one would use Z_DEFAULT_STRATEGY for text compression.
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* This is here just to make pngtest replicate the results from libpng
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* versions prior to 1.5.3, and to test this new API.
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* versions prior to 1.5.4, and to test this new API.
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*/
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png_set_text_compression_strategy(write_ptr, Z_FILTERED);
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#endif
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@ -3429,7 +3429,7 @@ read_palette(store_palette palette, int *npalette, png_structp pp, png_infop pi)
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if ((png_get_tRNS(pp, pi, &trans_alpha, &num, 0) & PNG_INFO_tRNS) != 0 &&
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(trans_alpha != NULL || num != 1/*returns 1 for a transparent color*/) &&
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/* Oops, if a palette tRNS gets expanded png_read_update_info (at least so
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* far as 1.5.3) does not zap the trans_alpha pointer, only num_trans, so
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* far as 1.5.4) does not zap the trans_alpha pointer, only num_trans, so
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* in the above call we get a success, we get a pointer (who knows what
|
||||
* to) and we get num_trans == 0:
|
||||
*/
|
||||
|
||||
@ -1458,7 +1458,7 @@ png_set_compression_method(png_structp png_ptr, int method)
|
||||
png_ptr->zlib_method = method;
|
||||
}
|
||||
|
||||
/* The following were added to libpng-1.5.3 */
|
||||
/* The following were added to libpng-1.5.4 */
|
||||
#ifdef PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED
|
||||
void PNGAPI
|
||||
png_set_text_compression_level(png_structp png_ptr, int level)
|
||||
@ -1539,7 +1539,7 @@ png_set_text_compression_method(png_structp png_ptr, int method)
|
||||
png_ptr->zlib_text_method = method;
|
||||
}
|
||||
#endif /* PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION_SUPPORTED */
|
||||
/* end of API added to libpng-1.5.3 */
|
||||
/* end of API added to libpng-1.5.4 */
|
||||
|
||||
void PNGAPI
|
||||
png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn)
|
||||
|
||||
@ -1017,7 +1017,7 @@ png_write_IDAT(png_structp png_ptr, png_bytep data, png_size_t length)
|
||||
png_write_chunk(png_ptr, png_IDAT, data, length);
|
||||
png_ptr->mode |= PNG_HAVE_IDAT;
|
||||
|
||||
/* Prior to 1.5.3 this code was replicated in every caller (except at the
|
||||
/* Prior to 1.5.4 this code was replicated in every caller (except at the
|
||||
* end, where it isn't technically necessary). Since this function has
|
||||
* flushed the data we can safely reset the zlib output buffer here.
|
||||
*/
|
||||
|
||||
Loading…
Reference in New Issue
Block a user