diff options
Diffstat (limited to 'abs/core-testing/libpng')
| -rw-r--r-- | abs/core-testing/libpng/ChangeLog | 51 | ||||
| -rw-r--r-- | abs/core-testing/libpng/PKGBUILD | 43 | ||||
| -rw-r--r-- | abs/core-testing/libpng/libpng-1.2.29-apng.patch | 1671 | ||||
| -rw-r--r-- | abs/core-testing/libpng/libpng-1.2.31-apng.patch | 1644 |
4 files changed, 3409 insertions, 0 deletions
diff --git a/abs/core-testing/libpng/ChangeLog b/abs/core-testing/libpng/ChangeLog new file mode 100644 index 0000000..9612756 --- /dev/null +++ b/abs/core-testing/libpng/ChangeLog @@ -0,0 +1,51 @@ + +2008-08-23 Douglas Soares de Andrade <douglas@archlinux.org> + + * Updated for i686: 1.2.31 + * Thanks to Hussam Al-Tayeb + +2008-08-17 Douglas Soares de Andrade <douglas@archlinux.org> + + * Had to return to 1.2.29 because xul depends on + png with apng patch + +2008-08-17 Douglas Soares de Andrade <douglas@archlinux.org> + + * Updated for i686: 1.2.30 + * Fixes some security issues + * Remove the apng patch as there was no compatible version + for this version + +2008-07-04 Douglas Soares de Andrade <douglas@archlinux.org> + + * Updated for i686 - 1.2.29-1 + * Updated the apng patch for 1.2.29 + +2008-05-06 Travis Willard <travis@archlinux.org> + + * 1.2.28-1 + Upstream update + Uses same APNG patchset as 1.2.27 + +2008-05-01 Jan de Groot <jgc@archlinux.org> + + * 1.2.27-1 + Upstream update (security update!) + Fix APNG patchset to apply to 1.2.27 + Fix build with newer libtool versions + +2008-03-12 Travis Willard <travis@archlinux.org> + + * 1.2.25-1 + Upstream update + +2008-02-18 Travis Willard <travis@archlinux.org> + + * 1.2.24-3 + Corrected ChangeLog + +2008-02-18 Travis Willard <travis@archlinux.org> + + * 1.2.24-2 + Added ChangeLog + Added APNG patchset from <http://littlesvr.ca/apng/> diff --git a/abs/core-testing/libpng/PKGBUILD b/abs/core-testing/libpng/PKGBUILD new file mode 100644 index 0000000..a67b300 --- /dev/null +++ b/abs/core-testing/libpng/PKGBUILD @@ -0,0 +1,43 @@ +# $Id: PKGBUILD 10073 2008-08-23 15:51:29Z douglas $ +# Maintainer: dorphell <dorphell@archlinux.org> +# Maintainer: Travis Willard <travis@archlinux.org> +# Maintainer: Douglas Soares de Andrade <douglas@archlinux.org> + +pkgname=libpng +pkgver=1.2.31 +pkgrel=1 +pkgdesc="A collection of routines used to create PNG format graphics files" +arch=('i686' 'x86_64') +url="http://www.libpng.org/pub/png/libpng.html" +license=('custom') +depends=('zlib') +options=('!libtool') +source=(http://downloads.sourceforge.net/sourceforge/${pkgname}/${pkgname}-${pkgver}.tar.bz2 + # http://littlesvr.ca/apng/diff/${pkgname}-${pkgver}-apng.patch + ${pkgname}-${pkgver}-apng.patch ) +options=('!libtool') + +md5sums=('78d2f8c4e0d64f8948819563587302d3' + 'fab42a4ad4de6fcb87dcca6a7a19aefb') + +build() { + cd ${startdir}/src/${pkgname}-${pkgver} + + # Add animated PNG (apng) support + patch -Np0 -i $startdir/src/${pkgname}-${pkgver}-apng.patch || return 1 + + libtoolize --force --copy || return 1 + aclocal || return 1 + autoconf || return 1 + automake --add-missing || return 1 + + ./configure --prefix=/usr || return 1 + make ECHO=echo || return 1 + make ECHO=echo DESTDIR=${startdir}/pkg install || return 1 + + cd contrib/pngminus + make ECHO=echo PNGLIB="-L${startdir}/pkg/usr/lib -lpng" -f makefile.std png2pnm pnm2png + install -m755 png2pnm pnm2png ${startdir}/pkg/usr/bin/ + install -m755 -d ${startdir}/pkg/usr/share/licenses/${pkgname} + install -m644 ../../LICENSE ${startdir}/pkg/usr/share/licenses/${pkgname}/ || return 1 +} diff --git a/abs/core-testing/libpng/libpng-1.2.29-apng.patch b/abs/core-testing/libpng/libpng-1.2.29-apng.patch new file mode 100644 index 0000000..cc27ca3 --- /dev/null +++ b/abs/core-testing/libpng/libpng-1.2.29-apng.patch @@ -0,0 +1,1671 @@ +Submitted By: Jens Ornot <oj_webstar@t-online.de> +Resubmitted by: Jens Ornot <oj_webstar@t-online.de> - Fix APNG patchset to apply to 1.2.27 +Date: 2008-05-24 +Initial Package Version: 1.2.10 +Upstream Status: Unknown +Origin: Andrew Smith +Description: APNG is an extension of the [PNG][pngspec] format, adding support for animated images. + It is intended to be a replacement for simple animated images + that have traditionally used the [GIF][gifspec] format, + while adding support for 24-bit images and 8-bit transparency. + APNG is a simpler alternative to MNG, + providing a spec suitable for the most common usage of animated images on the Internet. + + APNG is backwards-compatible with PNG; + any PNG decoder should be able to ignore the APNG-specific chunks and display a single image. + +diff -ruN libpng-1.2.27/png.c libpng-1.2.27.apng/png.c +--- libpng-1.2.27/png.c 2008-04-30 10:23:12.000000000 +0000 ++++ libpng-1.2.27.apng/png.c 2008-05-01 09:49:58.000000000 +0000 +@@ -51,6 +51,9 @@ + PNG_tIME; + PNG_tRNS; + PNG_zTXt; ++PNG_acTL; ++PNG_fcTL; ++PNG_fdAT; + + #ifdef PNG_READ_SUPPORTED + /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */ +diff -ruN libpng-1.2.27/png.h libpng-1.2.27.apng/png.h +--- libpng-1.2.27/png.h 2008-04-30 10:23:11.000000000 +0000 ++++ libpng-1.2.27.apng/png.h 2008-05-01 09:49:58.000000000 +0000 +@@ -958,6 +958,19 @@ + png_fixed_point int_y_blue; + #endif + ++#if defined(PNG_APNG_SUPPORTED) ++ png_uint_32 num_frames; /* including default image */ ++ png_uint_32 num_plays; ++ png_uint_32 next_frame_width; ++ png_uint_32 next_frame_height; ++ png_uint_32 next_frame_x_offset; ++ png_uint_32 next_frame_y_offset; ++ png_uint_16 next_frame_delay_num; ++ png_uint_16 next_frame_delay_den; ++ png_byte next_frame_dispose_op; ++ png_byte next_frame_blend_op; ++#endif ++ + } png_info; + + typedef png_info FAR * png_infop; +@@ -1059,6 +1072,8 @@ + #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ + #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ + #define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */ ++#define PNG_INFO_acTL 0x10000L ++#define PNG_INFO_fcTL 0x20000L + + /* This is used for the transformation routines, as some of them + * change these values for the row. It also should enable using +@@ -1099,6 +1114,10 @@ + typedef void (PNGAPI *png_progressive_end_ptr) PNGARG((png_structp, png_infop)); + typedef void (PNGAPI *png_progressive_row_ptr) PNGARG((png_structp, png_bytep, + png_uint_32, int)); ++#if defined(PNG_APNG_SUPPORTED) ++typedef void (PNGAPI *png_progressive_frame_ptr) PNGARG((png_structp, ++ png_uint_32)); ++#endif + #endif + + #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ +@@ -1430,6 +1449,39 @@ + png_uint_32 user_height_max; + #endif + ++#if defined(PNG_APNG_SUPPORTED) ++ png_uint_32 apng_flags; ++ png_uint_32 next_seq_num; /* next fcTL/fdAT chunk sequence number */ ++ png_uint_32 first_frame_width; ++ png_uint_32 first_frame_height; ++ ++#if defined(PNG_READ_APNG_SUPPORTED) ++ png_uint_32 num_frames_read; /* incremented after all image data of */ ++ /* a frame is read */ ++#ifdef PNG_PROGRESSIVE_READ_SUPPORTED ++ png_progressive_frame_ptr frame_info_fn; /* frame info read callback */ ++ png_progressive_frame_ptr frame_end_fn; /* frame data read callback */ ++#endif ++#endif ++ ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ png_uint_32 num_frames_to_write; ++ png_uint_32 num_frames_written; ++#endif ++#endif ++ ++/* For png_struct.apng_flags: */ ++#define PNG_FIRST_FRAME_HIDDEN 0x0001 ++ ++/* dispose_op flags from inside fcTL */ ++#define PNG_DISPOSE_OP_NONE 0x00 ++#define PNG_DISPOSE_OP_BACKGROUND 0x01 ++#define PNG_DISPOSE_OP_PREVIOUS 0x02 ++ ++/* blend_op flags from inside fcTL */ ++#define PNG_BLEND_OP_SOURCE 0x00 ++#define PNG_BLEND_OP_OVER 0x01 ++ + /* New member added in libpng-1.0.25 and 1.2.17 */ + #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) + /* storage for unknown chunk that the library doesn't recognize. */ +@@ -1759,6 +1811,18 @@ + extern PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr, + png_bytepp image)); + ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++extern PNG_EXPORT (void,png_write_frame_head) PNGARG((png_structp png_ptr, ++ png_infop png_info, png_bytepp row_pointers, ++ png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, ++ png_byte blend_op)); ++ ++extern PNG_EXPORT (void,png_write_frame_tail) PNGARG((png_structp png_ptr, ++ png_infop png_info)); ++#endif ++ + /* writes the end of the PNG file. */ + extern PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr, + png_infop info_ptr)); +@@ -2007,6 +2071,11 @@ + png_voidp progressive_ptr, + png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, + png_progressive_end_ptr end_fn)); ++#if defined(PNG_READ_APNG_SUPPORTED) ++extern PNG_EXPORT(void,png_set_progressive_frame_fn) PNGARG((png_structp png_ptr, ++ png_progressive_frame_ptr frame_info_fn, ++ png_progressive_frame_ptr frame_end_fn)); ++#endif + + /* returns the user pointer associated with the push read functions */ + extern PNG_EXPORT(png_voidp,png_get_progressive_ptr) +@@ -2444,6 +2513,59 @@ + #endif + #endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */ + ++#if defined(PNG_APNG_SUPPORTED) ++extern PNG_EXPORT(png_uint_32,png_get_acTL) PNGARG((png_structp png_ptr, ++ png_infop info_ptr, png_uint_32 *num_frames, png_uint_32 *num_plays)); ++extern PNG_EXPORT(png_uint_32,png_set_acTL) PNGARG((png_structp png_ptr, ++ png_infop info_ptr, png_uint_32 num_frames, png_uint_32 num_plays)); ++extern PNG_EXPORT(png_uint_32,png_get_num_frames) PNGARG((png_structp png_ptr, ++ png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_32,png_get_num_plays) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++ ++extern PNG_EXPORT(png_uint_32,png_get_next_frame_fcTL) ++ PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 *width, ++ png_uint_32 *height, png_uint_32 *x_offset, png_uint_32 *y_offset, ++ png_uint_16 *delay_num, png_uint_16 *delay_den, png_byte *dispose_op, ++ png_byte *blend_op)); ++extern PNG_EXPORT(png_uint_32,png_set_next_frame_fcTL) ++ PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 width, ++ png_uint_32 height, png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, ++ png_byte blend_op)); ++extern PNG_EXPORT(void,png_ensure_fcTL_is_valid) ++ PNGARG((png_structp png_ptr, ++ png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, ++ png_byte dispose_op, png_byte blend_op)); ++extern PNG_EXPORT(png_uint_32,png_get_next_frame_width) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_32,png_get_next_frame_height) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_32,png_get_next_frame_x_offset) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_32,png_get_next_frame_y_offset) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_16,png_get_next_frame_delay_num) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_16,png_get_next_frame_delay_den) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_byte,png_get_next_frame_dispose_op) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_byte,png_get_next_frame_blend_op) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_byte,png_get_first_frame_is_hidden) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_32,png_set_first_frame_is_hidden) ++ PNGARG((png_structp png_ptr, png_infop info_ptr, png_byte is_hidden)); ++#endif /* PNG_APNG_SUPPORTED */ ++ ++#if defined(PNG_READ_APNG_SUPPORTED) ++extern PNG_EXPORT(void,png_read_frame_head) PNGARG((png_structp png_ptr, ++ png_infop info_ptr)); ++#endif ++ + #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) + /* provide a list of chunks and how they are to be handled, if the built-in + handling or default unknown chunk handling is not desired. Any chunks not +@@ -2750,6 +2872,8 @@ + #define PNG_BACKGROUND_IS_GRAY 0x800 + #define PNG_HAVE_PNG_SIGNATURE 0x1000 + #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ ++#define PNG_HAVE_acTL 0x4000 ++#define PNG_HAVE_fcTL 0x8000L + + /* flags for the transformations the PNG library does on the image data */ + #define PNG_BGR 0x0001 +@@ -2890,6 +3014,9 @@ + #define PNG_tIME png_byte png_tIME[5] = {116, 73, 77, 69, '\0'} + #define PNG_tRNS png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'} + #define PNG_zTXt png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'} ++#define PNG_acTL png_byte png_acTL[5] = { 97, 99, 84, 76, '\0'} ++#define PNG_fcTL png_byte png_fcTL[5] = {102, 99, 84, 76, '\0'} ++#define PNG_fdAT png_byte png_fdAT[5] = {102, 100, 65, 84, '\0'} + + #ifdef PNG_USE_GLOBAL_ARRAYS + PNG_EXPORT_VAR (png_byte FARDATA) png_IHDR[5]; +@@ -2913,6 +3040,9 @@ + PNG_EXPORT_VAR (png_byte FARDATA) png_tIME[5]; + PNG_EXPORT_VAR (png_byte FARDATA) png_tRNS[5]; + PNG_EXPORT_VAR (png_byte FARDATA) png_zTXt[5]; ++PNG_EXPORT_VAR (png_byte FARDATA) png_acTL[5]; ++PNG_EXPORT_VAR (png_byte FARDATA) png_fcTL[5]; ++PNG_EXPORT_VAR (png_byte FARDATA) png_fdAT[5]; + #endif /* PNG_USE_GLOBAL_ARRAYS */ + + #if defined(PNG_1_0_X) || defined (PNG_1_2_X) +@@ -3187,6 +3317,17 @@ + #endif + #endif + ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++PNG_EXTERN void png_write_acTL PNGARG((png_structp png_ptr, ++ png_uint_32 num_frames, png_uint_32 num_plays)); ++ ++PNG_EXTERN void png_write_fcTL PNGARG((png_structp png_ptr, ++ png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, ++ png_byte dispose_op, png_byte blend_op)); ++#endif ++ + /* Called when finished processing a row of data */ + PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); + +@@ -3238,6 +3379,20 @@ + PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, + png_infop info_ptr)); + ++#if defined(PNG_READ_APNG_SUPPORTED) ++/* private, reset some things to become ready for reading next frame */ ++PNG_EXTERN void png_read_reset PNGARG((png_structp png_ptr)); ++PNG_EXTERN void png_read_reinit PNGARG((png_structp png_ptr, ++ png_infop info_ptr)); ++PNG_EXTERN void png_progressive_read_reset PNGARG((png_structp png_ptr)); ++#endif ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++/* private, reset some things to become ready for writing next frame */ ++PNG_EXTERN void png_write_reset PNGARG((png_structp png_ptr)); ++PNG_EXTERN void png_write_reinit PNGARG((png_structp png_ptr, ++ png_infop info_ptr, png_uint_32 width, png_uint_32 height)); ++#endif ++ + /* these are the functions that do the transformations */ + #if defined(PNG_READ_FILLER_SUPPORTED) + PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, +@@ -3453,6 +3608,18 @@ + png_uint_32 length)); + #endif + ++#if defined(PNG_READ_APNG_SUPPORTED) ++PNG_EXTERN void png_handle_acTL PNGARG((png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 length)); ++PNG_EXTERN void png_handle_fcTL PNGARG((png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 length)); ++PNG_EXTERN void png_have_info PNGARG((png_structp png_ptr, png_infop info_ptr)); ++PNG_EXTERN void png_handle_fdAT PNGARG((png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 length)); ++PNG_EXTERN void png_ensure_sequence_number PNGARG((png_structp png_ptr, ++ png_uint_32 length)); ++#endif ++ + PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 length)); + +diff -ruN libpng-1.2.27/pngconf.h libpng-1.2.27.apng/pngconf.h +--- libpng-1.2.27/pngconf.h 2008-04-30 10:23:11.000000000 +0000 ++++ libpng-1.2.27.apng/pngconf.h 2008-05-01 09:49:58.000000000 +0000 +@@ -925,6 +925,10 @@ + # define PNG_READ_zTXt_SUPPORTED + # define PNG_zTXt_SUPPORTED + #endif ++#ifndef PNG_NO_READ_APNG ++# define PNG_READ_APNG_SUPPORTED ++# define PNG_APNG_SUPPORTED ++#endif + #ifndef PNG_NO_READ_UNKNOWN_CHUNKS + # define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED + # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED +@@ -1067,6 +1071,12 @@ + # define PNG_zTXt_SUPPORTED + # endif + #endif ++#ifndef PNG_NO_WRITE_APNG ++# define PNG_WRITE_APNG_SUPPORTED ++# ifndef PNG_APNG_SUPPORTED ++# define PNG_APNG_SUPPORTED ++# endif ++#endif + #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS + # define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED + # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED +diff -ruN libpng-1.2.27/pngget.c libpng-1.2.27.apng/pngget.c +--- libpng-1.2.27/pngget.c 2008-04-30 10:23:12.000000000 +0000 ++++ libpng-1.2.27.apng/pngget.c 2008-05-01 09:49:58.000000000 +0000 +@@ -797,6 +797,167 @@ + } + #endif + ++#if defined(PNG_APNG_SUPPORTED) ++png_uint_32 PNGAPI ++png_get_acTL(png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 *num_frames, png_uint_32 *num_plays) ++{ ++ png_debug1(1, "in %s retrieval function\n", "acTL"); ++ ++ if (png_ptr != NULL && info_ptr != NULL && ++ (info_ptr->valid & PNG_INFO_acTL) && ++ num_frames != NULL && num_plays != NULL) ++ { ++ *num_frames = info_ptr->num_frames; ++ *num_plays = info_ptr->num_plays; ++ return (1); ++ } ++ ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_num_frames(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_num_frames()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->num_frames); ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_num_plays(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_num_plays()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->num_plays); ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 *width, png_uint_32 *height, ++ png_uint_32 *x_offset, png_uint_32 *y_offset, ++ png_uint_16 *delay_num, png_uint_16 *delay_den, ++ png_byte *dispose_op, png_byte *blend_op) ++{ ++ png_debug1(1, "in %s retrieval function\n", "fcTL"); ++ ++ if (png_ptr != NULL && info_ptr != NULL && ++ (info_ptr->valid & PNG_INFO_fcTL) && ++ width != NULL && height != NULL && ++ x_offset != NULL && x_offset != NULL && ++ delay_num != NULL && delay_den != NULL && ++ dispose_op != NULL && blend_op != NULL) ++ { ++ *width = info_ptr->next_frame_width; ++ *height = info_ptr->next_frame_height; ++ *x_offset = info_ptr->next_frame_x_offset; ++ *y_offset = info_ptr->next_frame_y_offset; ++ *delay_num = info_ptr->next_frame_delay_num; ++ *delay_den = info_ptr->next_frame_delay_den; ++ *dispose_op = info_ptr->next_frame_dispose_op; ++ *blend_op = info_ptr->next_frame_blend_op; ++ return (1); ++ } ++ ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_next_frame_width(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_width()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_width); ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_next_frame_height(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_height()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_height); ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_next_frame_x_offset(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_x_offset()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_x_offset); ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_next_frame_y_offset(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_y_offset()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_y_offset); ++ return (0); ++} ++ ++png_uint_16 PNGAPI ++png_get_next_frame_delay_num(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_delay_num()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_delay_num); ++ return (0); ++} ++ ++png_uint_16 PNGAPI ++png_get_next_frame_delay_den(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_delay_den()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_delay_den); ++ return (0); ++} ++ ++png_byte PNGAPI ++png_get_next_frame_dispose_op(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_dispose_op()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_dispose_op); ++ return (0); ++} ++ ++png_byte PNGAPI ++png_get_next_frame_blend_op(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_blend_op()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_blend_op); ++ return (0); ++} ++ ++png_byte PNGAPI ++png_get_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_first_frame_is_hidden()\n"); ++ ++ if (png_ptr != NULL) ++ return (png_byte)(png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN); ++ ++ return 0; ++} ++#endif /* PNG_APNG_SUPPORTED */ ++ + #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) + png_uint_32 PNGAPI + png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr, +diff -ruN libpng-1.2.27/pngpread.c libpng-1.2.27.apng/pngpread.c +--- libpng-1.2.27/pngpread.c 2008-04-30 10:23:12.000000000 +0000 ++++ libpng-1.2.27.apng/pngpread.c 2008-05-01 09:49:58.000000000 +0000 +@@ -192,6 +192,11 @@ + #if defined(PNG_READ_zTXt_SUPPORTED) + PNG_CONST PNG_zTXt; + #endif ++#if defined(PNG_READ_APNG_SUPPORTED) ++ PNG_CONST PNG_acTL; ++ PNG_CONST PNG_fcTL; ++ PNG_CONST PNG_fdAT; ++#endif + #endif /* PNG_USE_LOCAL_ARRAYS */ + /* First we make sure we have enough data for the 4 byte chunk name + * and the 4 byte chunk length before proceeding with decoding the +@@ -215,7 +220,104 @@ + png_crc_read(png_ptr, png_ptr->chunk_name, 4); + png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; + } +- ++ ++#if defined(PNG_READ_APNG_SUPPORTED) ++ if (png_ptr->num_frames_read > 0 && ++ png_ptr->num_frames_read < info_ptr->num_frames) ++ { ++ if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) ++ { ++ /* discard trailing IDATs for the first frame */ ++ if (png_ptr->mode & PNG_HAVE_fcTL || png_ptr->num_frames_read > 1) ++ png_error(png_ptr, "out of place IDAT"); ++ ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_push_crc_skip(png_ptr, png_ptr->push_length); ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ return; ++ } ++ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) ++ { ++ if (png_ptr->buffer_size < 4) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_ensure_sequence_number(png_ptr, 4); ++ ++ if (!(png_ptr->mode & PNG_HAVE_fcTL)) ++ { ++ /* discard trailing fdATs for frames other than the first */ ++ if (png_ptr->num_frames_read < 2) ++ png_error(png_ptr, "out of place fdAT"); ++ ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_push_crc_skip(png_ptr, png_ptr->push_length); ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ return; ++ } ++ else ++ { ++ /* frame data follows */ ++ png_ptr->idat_size = png_ptr->push_length - 4; ++ png_ptr->mode |= PNG_HAVE_IDAT; ++ png_ptr->process_mode = PNG_READ_IDAT_MODE; ++ ++ return; ++ } ++ } ++ else if(!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) ++ { ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ ++ png_read_reset(png_ptr); ++ png_ptr->mode &= ~PNG_HAVE_fcTL; ++ ++ png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length); ++ ++ if (!(png_ptr->mode & PNG_HAVE_fcTL)) ++ png_error(png_ptr, "missing required fcTL chunk"); ++ ++ png_read_reinit(png_ptr, info_ptr); ++ png_progressive_read_reset(png_ptr); ++ ++ if (png_ptr->frame_info_fn != NULL) ++ (*(png_ptr->frame_info_fn))(png_ptr, png_ptr->num_frames_read); ++ ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ ++ return; ++ } ++ else ++ { ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_warning(png_ptr, "Skipped (ignored) a chunk " ++ "between APNG chunks"); ++ png_push_crc_skip(png_ptr, png_ptr->push_length); ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ return; ++ } ++ ++ return; ++ } ++#endif /* PNG_READ_APNG_SUPPORTED */ ++ + if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) + if(png_ptr->mode & PNG_AFTER_IDAT) + png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; +@@ -297,6 +399,9 @@ + png_error(png_ptr, "Too many IDAT's found"); + } + ++#if defined(PNG_READ_APNG_SUPPORTED) ++ png_have_info(png_ptr, info_ptr); ++#endif + png_ptr->idat_size = png_ptr->push_length; + png_ptr->mode |= PNG_HAVE_IDAT; + png_ptr->process_mode = PNG_READ_IDAT_MODE; +@@ -492,6 +597,35 @@ + png_push_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length); + } + #endif ++#if defined(PNG_READ_APNG_SUPPORTED) ++ else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4)) ++ { ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_handle_acTL(png_ptr, info_ptr, png_ptr->push_length); ++ } ++ else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) ++ { ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length); ++ } ++ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) ++ { ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_handle_fdAT(png_ptr, info_ptr, png_ptr->push_length); ++ } ++#endif /* PNG_READ_APNG_SUPPORTED */ + else + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) +@@ -662,13 +796,17 @@ + png_push_read_IDAT(png_structp png_ptr) + { + #ifdef PNG_USE_LOCAL_ARRAYS +- PNG_CONST PNG_IDAT; ++ PNG_IDAT; ++#if defined(PNG_READ_APNG_SUPPORTED) ++ PNG_fdAT; ++ PNG_IEND; ++#endif + #endif + if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) + { + png_byte chunk_length[4]; + +- if (png_ptr->buffer_size < 8) ++ if (png_ptr->buffer_size < 12) + { + png_push_save_buffer(png_ptr); + return; +@@ -680,15 +818,59 @@ + png_crc_read(png_ptr, png_ptr->chunk_name, 4); + png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; + +- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) ++#if defined(PNG_READ_APNG_SUPPORTED) ++ if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_fdAT, 4) ++ && png_ptr->num_frames_read > 0) ++ { ++ if (png_ptr->flags & PNG_FLAG_ZLIB_FINISHED) ++ { ++ png_ptr->process_mode = PNG_READ_CHUNK_MODE; ++ if (png_ptr->frame_end_fn != NULL) ++ (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read); ++ png_ptr->num_frames_read++; ++ return; ++ } ++ else ++ { ++ if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) ++ png_error(png_ptr, "Not enough image data"); ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_warning(png_ptr, "Skipping (ignoring) a chunk between " ++ "APNG chunks"); ++ png_crc_finish(png_ptr, png_ptr->push_length); ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ return; ++ } ++ } ++ else ++#endif ++ if ( png_memcmp(png_ptr->chunk_name, png_IDAT, 4) ++ && (png_ptr->num_frames_read == 0) ) + { + png_ptr->process_mode = PNG_READ_CHUNK_MODE; + if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) + png_error(png_ptr, "Not enough compressed data"); ++#if defined(PNG_READ_APNG_SUPPORTED) ++ if (png_ptr->frame_end_fn != NULL) ++ (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read); ++ png_ptr->num_frames_read++; ++#endif + return; + } + + png_ptr->idat_size = png_ptr->push_length; ++ ++#if defined(PNG_READ_APNG_SUPPORTED) ++ if(png_ptr->num_frames_read > 0) ++ { ++ png_ensure_sequence_number(png_ptr, 4); ++ png_ptr->idat_size -= 4; ++ } ++#endif + } + if (png_ptr->idat_size && png_ptr->save_buffer_size) + { +@@ -1589,6 +1771,17 @@ + png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer); + } + ++#if defined(PNG_READ_APNG_SUPPORTED) ++void PNGAPI ++png_set_progressive_frame_fn(png_structp png_ptr, ++ png_progressive_frame_ptr frame_info_fn, ++ png_progressive_frame_ptr frame_end_fn) ++{ ++ png_ptr->frame_info_fn = frame_info_fn; ++ png_ptr->frame_end_fn = frame_end_fn; ++} ++#endif ++ + png_voidp PNGAPI + png_get_progressive_ptr(png_structp png_ptr) + { +diff -ruN libpng-1.2.27/pngread.c libpng-1.2.27.apng/pngread.c +--- libpng-1.2.27/pngread.c 2008-04-30 10:23:12.000000000 +0000 ++++ libpng-1.2.27.apng/pngread.c 2008-05-01 09:49:58.000000000 +0000 +@@ -405,6 +405,11 @@ + #if defined(PNG_READ_zTXt_SUPPORTED) + PNG_CONST PNG_zTXt; + #endif ++#if defined(PNG_READ_APNG_SUPPORTED) ++ PNG_CONST PNG_acTL; ++ PNG_CONST PNG_fcTL; ++ PNG_CONST PNG_fdAT; ++#endif + #endif /* PNG_USE_LOCAL_ARRAYS */ + png_byte chunk_length[4]; + png_uint_32 length; +@@ -458,6 +463,9 @@ + !(png_ptr->mode & PNG_HAVE_PLTE)) + png_error(png_ptr, "Missing PLTE before IDAT"); + ++#if defined(PNG_READ_APNG_SUPPORTED) ++ png_have_info(png_ptr, info_ptr); ++#endif + png_ptr->idat_size = length; + png_ptr->mode |= PNG_HAVE_IDAT; + break; +@@ -530,12 +538,97 @@ + else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4)) + png_handle_iTXt(png_ptr, info_ptr, length); + #endif ++#if defined(PNG_READ_APNG_SUPPORTED) ++ else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4)) ++ png_handle_acTL(png_ptr, info_ptr, length); ++ else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) ++ png_handle_fcTL(png_ptr, info_ptr, length); ++ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) ++ png_handle_fdAT(png_ptr, info_ptr, length); ++#endif + else + png_handle_unknown(png_ptr, info_ptr, length); + } + } + #endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ + ++#if defined(PNG_READ_APNG_SUPPORTED) ++void PNGAPI ++png_read_frame_head(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_byte have_chunk_after_DAT; /* after IDAT or after fdAT */ ++ ++ png_debug(0, "Reading frame head\n"); ++ ++ if (!(png_ptr->mode & PNG_HAVE_acTL)) ++ png_error(png_ptr, "attempt to png_read_frame_head() but " ++ "no acTL present"); ++ ++ /* do nothing for the main IDAT */ ++ if (png_ptr->num_frames_read == 0) ++ return; ++ ++ png_crc_finish(png_ptr, 0); /* CRC from last IDAT or fdAT chunk */ ++ ++ png_read_reset(png_ptr); ++ png_ptr->mode &= ~PNG_HAVE_fcTL; ++ ++ have_chunk_after_DAT = 0; ++ for (;;) ++ { ++#ifdef PNG_USE_LOCAL_ARRAYS ++ PNG_IDAT; ++ PNG_fdAT; ++ PNG_fcTL; ++#endif ++ png_byte chunk_length[4]; ++ png_uint_32 length; ++ ++ png_read_data(png_ptr, chunk_length, 4); ++ length = png_get_uint_31(png_ptr, chunk_length); ++ ++ png_reset_crc(png_ptr); ++ png_crc_read(png_ptr, png_ptr->chunk_name, 4); ++ ++ if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) ++ { ++ /* discard trailing IDATs for the first frame */ ++ if (have_chunk_after_DAT || png_ptr->num_frames_read > 1) ++ png_error(png_ptr, "png_read_frame_head(): out of place IDAT"); ++ png_crc_finish(png_ptr, length); ++ } ++ else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) ++ { ++ png_handle_fcTL(png_ptr, info_ptr, length); ++ have_chunk_after_DAT = 1; ++ } ++ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) ++ { ++ png_ensure_sequence_number(png_ptr, length); ++ ++ /* discard trailing fdATs for frames other than the first */ ++ if (!have_chunk_after_DAT && png_ptr->num_frames_read > 1) ++ png_crc_finish(png_ptr, length - 4); ++ else if(png_ptr->mode & PNG_HAVE_fcTL) ++ { ++ png_ptr->idat_size = length - 4; ++ png_ptr->mode |= PNG_HAVE_IDAT; ++ ++ break; ++ } ++ else ++ png_error(png_ptr, "png_read_frame_head(): out of place fdAT"); ++ } ++ else ++ { ++ png_warning(png_ptr, "Skipped (ignored) a chunk " ++ "between APNG chunks"); ++ png_crc_finish(png_ptr, length); ++ } ++ } ++} ++#endif /* PNG_READ_APNG_SUPPORTED */ ++ + /* optional call to update the users info_ptr structure */ + void PNGAPI + png_read_update_info(png_structp png_ptr, png_infop info_ptr) +@@ -572,6 +665,10 @@ + { + #ifdef PNG_USE_LOCAL_ARRAYS + PNG_CONST PNG_IDAT; ++#if defined(PNG_READ_APNG_SUPPORTED) ++ PNG_CONST PNG_fdAT; ++ PNG_CONST PNG_IEND; ++#endif + PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, + 0xff}; + PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; +@@ -701,19 +798,46 @@ + { + if (!(png_ptr->zstream.avail_in)) + { +- while (!png_ptr->idat_size) ++ png_uint_32 bytes_to_skip = 0; ++ ++ while (!png_ptr->idat_size || bytes_to_skip != 0) + { + png_byte chunk_length[4]; + +- png_crc_finish(png_ptr, 0); +- ++ png_crc_finish(png_ptr, bytes_to_skip); ++ bytes_to_skip = 0; ++ + png_read_data(png_ptr, chunk_length, 4); + png_ptr->idat_size = png_get_uint_31(png_ptr,chunk_length); +- ++ + png_reset_crc(png_ptr); + png_crc_read(png_ptr, png_ptr->chunk_name, 4); +- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) +- png_error(png_ptr, "Not enough image data"); ++ ++#if defined(PNG_READ_APNG_SUPPORTED) ++ if (png_ptr->num_frames_read == 0) ++ { ++#endif ++ if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) ++ png_error(png_ptr, "Not enough image data"); ++#if defined(PNG_READ_APNG_SUPPORTED) ++ } ++ else ++ { ++ if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) ++ png_error(png_ptr, "Not enough image data"); ++ if (png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) ++ { ++ png_warning(png_ptr, "Skipped (ignored) a chunk " ++ "between APNG chunks"); ++ bytes_to_skip = png_ptr->idat_size; ++ continue; ++ } ++ ++ png_ensure_sequence_number(png_ptr, png_ptr->idat_size); ++ ++ png_ptr->idat_size -= 4; ++ } ++#endif + } + png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; + png_ptr->zstream.next_in = png_ptr->zbuf; +@@ -731,6 +855,9 @@ + png_error(png_ptr, "Extra compressed data"); + png_ptr->mode |= PNG_AFTER_IDAT; + png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; ++#if defined(PNG_READ_APNG_SUPPORTED) ++ png_ptr->num_frames_read++; ++#endif + break; + } + if (ret != Z_OK) +@@ -985,6 +1112,11 @@ + #if defined(PNG_READ_zTXt_SUPPORTED) + PNG_CONST PNG_zTXt; + #endif ++#if defined(PNG_READ_APNG_SUPPORTED) ++ PNG_CONST PNG_acTL; ++ PNG_CONST PNG_fcTL; ++ PNG_CONST PNG_fdAT; ++#endif + #endif /* PNG_USE_LOCAL_ARRAYS */ + + png_read_data(png_ptr, chunk_length, 4); +@@ -1091,6 +1223,14 @@ + else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4)) + png_handle_iTXt(png_ptr, info_ptr, length); + #endif ++#if defined(PNG_READ_APNG_SUPPORTED) ++ else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4)) ++ png_handle_acTL(png_ptr, info_ptr, length); ++ else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) ++ png_handle_fcTL(png_ptr, info_ptr, length); ++ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) ++ png_handle_fdAT(png_ptr, info_ptr, length); ++#endif + else + png_handle_unknown(png_ptr, info_ptr, length); + } while (!(png_ptr->mode & PNG_HAVE_IEND)); +diff -ruN libpng-1.2.27/pngrtran.c libpng-1.2.27.apng/pngrtran.c +--- libpng-1.2.27/pngrtran.c 2008-04-30 10:23:13.000000000 +0000 ++++ libpng-1.2.27.apng/pngrtran.c 2008-05-01 09:49:58.000000000 +0000 +@@ -1286,7 +1286,7 @@ + * or png_read_update_info() after setting transforms that expand + * pixels. This check added to libpng-1.2.19 */ + #if (PNG_WARN_UNINITIALIZED_ROW==1) +- png_error(png_ptr, "Uninitialized row"); ++ png_warning(png_ptr, "Uninitialized row"); + #else + png_warning(png_ptr, "Uninitialized row"); + #endif +diff -ruN libpng-1.2.27/pngrutil.c libpng-1.2.27.apng/pngrutil.c +--- libpng-1.2.27/pngrutil.c 2008-04-30 10:23:13.000000000 +0000 ++++ libpng-1.2.27.apng/pngrutil.c 2008-05-01 09:49:58.000000000 +0000 +@@ -374,6 +374,11 @@ + filter_type = buf[11]; + interlace_type = buf[12]; + ++#if defined(PNG_READ_APNG_SUPPORTED) ++ png_ptr->first_frame_width = width; ++ png_ptr->first_frame_height = height; ++#endif ++ + /* set internal variables */ + png_ptr->width = width; + png_ptr->height = height; +@@ -2169,6 +2174,168 @@ + } + #endif + ++#if defined(PNG_READ_APNG_SUPPORTED) ++void /* PRIVATE */ ++png_handle_acTL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) ++{ ++ png_byte data[8]; ++ png_uint_32 num_frames; ++ png_uint_32 num_plays; ++ png_uint_32 didSet; ++ ++ png_debug(1, "in png_handle_acTL\n"); ++ ++ if (!(png_ptr->mode & PNG_HAVE_IHDR)) ++ { ++ png_error(png_ptr, "Missing IHDR before acTL"); ++ } ++ else if (png_ptr->mode & PNG_HAVE_IDAT) ++ { ++ png_warning(png_ptr, "Invalid acTL after IDAT skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ else if (png_ptr->mode & PNG_HAVE_acTL) ++ { ++ png_warning(png_ptr, "Duplicate acTL skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ else if (length != 8) ++ { ++ png_warning(png_ptr, "acTL with invalid length skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ ++ png_crc_read(png_ptr, data, 8); ++ png_crc_finish(png_ptr, 0); ++ ++ num_frames = png_get_uint_31(png_ptr, data); ++ num_plays = png_get_uint_31(png_ptr, data + 4); ++ ++ /* the set function will do error checking on num_frames */ ++ didSet = png_set_acTL(png_ptr, info_ptr, num_frames, num_plays); ++ if(didSet) ++ png_ptr->mode |= PNG_HAVE_acTL; ++} ++ ++void /* PRIVATE */ ++png_handle_fcTL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) ++{ ++ png_byte data[22]; ++ png_uint_32 width; ++ png_uint_32 height; ++ png_uint_32 x_offset; ++ png_uint_32 y_offset; ++ png_uint_16 delay_num; ++ png_uint_16 delay_den; ++ png_byte dispose_op; ++ png_byte blend_op; ++ ++ png_debug(1, "in png_handle_fcTL\n"); ++ ++ if (!(png_ptr->mode & PNG_HAVE_IHDR)) ++ { ++ png_error(png_ptr, "Missing IHDR before fcTL"); ++ } ++ else if (png_ptr->mode & PNG_HAVE_IDAT) ++ { ++ /* for any frames other then the first this message may be misleading, ++ * but correct. PNG_HAVE_IDAT is unset before the frame head is read ++ * i can't think of a better message */ ++ png_warning(png_ptr, "Invalid fcTL after IDAT skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ else if (png_ptr->mode & PNG_HAVE_fcTL) ++ { ++ png_warning(png_ptr, "Duplicate fcTL within one frame skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ else if (length != 26) ++ { ++ png_warning(png_ptr, "fcTL with invalid length skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ ++ png_ensure_sequence_number(png_ptr, length); ++ ++ png_crc_read(png_ptr, data, 22); ++ png_crc_finish(png_ptr, 0); ++ ++ width = png_get_uint_31(png_ptr, data); ++ height = png_get_uint_31(png_ptr, data + 4); ++ x_offset = png_get_uint_31(png_ptr, data + 8); ++ y_offset = png_get_uint_31(png_ptr, data + 12); ++ delay_num = png_get_uint_16(data + 16); ++ delay_den = png_get_uint_16(data + 18); ++ dispose_op = data[20]; ++ blend_op = data[21]; ++ ++ if (png_ptr->num_frames_read == 0 && (x_offset != 0 || y_offset != 0)) ++ png_error(png_ptr, "fcTL for the first frame must have zero offset"); ++ if (png_ptr->num_frames_read == 0 && ++ (width != info_ptr->width || height != info_ptr->height)) ++ png_error(png_ptr, "size in first frame's fcTL must match " ++ "the size in IHDR"); ++ ++ /* the set function will do more error checking */ ++ png_set_next_frame_fcTL(png_ptr, info_ptr, width, height, ++ x_offset, y_offset, delay_num, delay_den, ++ dispose_op, blend_op); ++ ++ png_read_reinit(png_ptr, info_ptr); ++ ++ png_ptr->mode |= PNG_HAVE_fcTL; ++} ++ ++void /* PRIVATE */ ++png_have_info(png_structp png_ptr, png_infop info_ptr) ++{ ++ if((info_ptr->valid & PNG_INFO_acTL) && !(info_ptr->valid & PNG_INFO_fcTL)) ++ { ++ png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN; ++ info_ptr->num_frames++; ++ } ++} ++ ++void /* PRIVATE */ ++png_handle_fdAT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) ++{ ++ png_ensure_sequence_number(png_ptr, length); ++ ++ /* This function is only called from png_read_end(), png_read_info(), ++ * and png_push_read_chunk() which means that: ++ * - the user doesn't want to read this frame ++ * - or this is an out-of-place fdAT ++ * in either case it is safe to ignore the chunk with a warning */ ++ png_warning(png_ptr, "ignoring fdAT chunk"); ++ png_crc_finish(png_ptr, length - 4); ++} ++ ++void /* PRIVATE */ ++png_ensure_sequence_number(png_structp png_ptr, png_uint_32 length) ++{ ++ png_byte data[4]; ++ png_uint_32 sequence_number; ++ ++ if (length < 4) ++ png_error(png_ptr, "invalid fcTL or fdAT chunk found"); ++ ++ png_crc_read(png_ptr, data, 4); ++ sequence_number = png_get_uint_31(png_ptr, data); ++ ++ if (sequence_number != png_ptr->next_seq_num) ++ png_error(png_ptr, "fcTL or fdAT chunk with out-of-order sequence " ++ "number found"); ++ ++ png_ptr->next_seq_num++; ++} ++#endif /* PNG_READ_APNG_SUPPORTED */ ++ + /* This function is called when we haven't found a handler for a + chunk. If there isn't a problem with the chunk itself (ie bad + chunk name, CRC, or a critical chunk), the chunk is silently ignored +@@ -3180,4 +3347,82 @@ + + png_ptr->flags |= PNG_FLAG_ROW_INIT; + } ++ ++#if defined(PNG_READ_APNG_SUPPORTED) ++/* This function is to be called after the main IDAT set has been read and ++ * before a new IDAT is read. It resets some parts of png_ptr ++ * to make them usable by the read functions again */ ++void /* PRIVATE */ ++png_read_reset(png_structp png_ptr) ++{ ++ png_ptr->mode &= ~PNG_HAVE_IDAT; ++ png_ptr->mode &= ~PNG_AFTER_IDAT; ++ png_ptr->row_number = 0; ++ png_ptr->pass = 0; ++ png_ptr->flags &= ~PNG_FLAG_ROW_INIT; ++} ++ ++void /* PRIVATE */ ++png_read_reinit(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_ptr->width = info_ptr->next_frame_width; ++ png_ptr->height = info_ptr->next_frame_height; ++ png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->width); ++} ++ ++/* same as png_read_reset() but for the progressive reader */ ++void /* PRIVATE */ ++png_progressive_read_reset(png_structp png_ptr) ++{ ++#ifdef PNG_USE_LOCAL_ARRAYS ++ /* start of interlace block */ ++ const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; ++ ++ /* offset to next interlace block */ ++ const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; ++ ++ /* start of interlace block in the y direction */ ++ const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; ++ ++ /* offset to next interlace block in the y direction */ ++ const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; ++#endif ++ png_uint_32 row_bytes; ++ ++ if (png_ptr->interlaced) ++ { ++ if (!(png_ptr->transformations & PNG_INTERLACE)) ++ png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 - ++ png_pass_ystart[0]) / png_pass_yinc[0]; ++ else ++ png_ptr->num_rows = png_ptr->height; ++ ++ png_ptr->iwidth = (png_ptr->width + ++ png_pass_inc[png_ptr->pass] - 1 - ++ png_pass_start[png_ptr->pass]) / ++ png_pass_inc[png_ptr->pass]; ++ ++ row_bytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->iwidth) + 1; ++ ++ png_ptr->irowbytes = (png_size_t)row_bytes; ++ if((png_uint_32)png_ptr->irowbytes != row_bytes) ++ png_error(png_ptr, "png_progressive_read_reset(): Rowbytes " ++ "overflow"); ++ } ++ else ++ { ++ png_ptr->num_rows = png_ptr->height; ++ png_ptr->iwidth = png_ptr->width; ++ png_ptr->irowbytes = png_ptr->rowbytes + 1; ++ } ++ ++ png_ptr->flags &= ~PNG_FLAG_ZLIB_FINISHED; ++ if (inflateReset(&(png_ptr->zstream)) != Z_OK) ++ png_error(png_ptr, "inflateReset failed"); ++ png_ptr->zstream.avail_in = 0; ++ png_ptr->zstream.next_in = 0; ++ png_ptr->zstream.next_out = png_ptr->row_buf; ++ png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes; ++} ++#endif /* PNG_READ_APNG_SUPPORTED */ + #endif /* PNG_READ_SUPPORTED */ +diff -ruN libpng-1.2.27/pngset.c libpng-1.2.27.apng/pngset.c +--- libpng-1.2.27/pngset.c 2008-04-30 10:23:13.000000000 +0000 ++++ libpng-1.2.27.apng/pngset.c 2008-05-01 09:49:58.000000000 +0000 +@@ -364,6 +364,11 @@ + info_ptr->rowbytes = (png_size_t)0; + else + info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,width); ++ ++#if defined(PNG_APNG_SUPPORTED) ++ /* for non-animated png. this may be overritten from an acTL chunk later */ ++ info_ptr->num_frames = 1; ++#endif + } + + #if defined(PNG_oFFs_SUPPORTED) +@@ -1025,6 +1030,141 @@ + } + #endif /* PNG_sPLT_SUPPORTED */ + ++#if defined(PNG_APNG_SUPPORTED) ++png_uint_32 PNGAPI ++png_set_acTL(png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 num_frames, png_uint_32 num_plays) ++{ ++ png_debug1(1, "in %s storage function\n", "acTL"); ++ ++ if (png_ptr == NULL || info_ptr == NULL) ++ { ++ png_warning(png_ptr, ++ "Call to png_set_acTL() with NULL png_ptr " ++ "or info_ptr ignored"); ++ return (0); ++ } ++ if (num_frames == 0) ++ { ++ png_warning(png_ptr, ++ "Ignoring attempt to set acTL with num_frames zero"); ++ return (0); ++ } ++ if (num_frames > PNG_UINT_31_MAX) ++ { ++ png_warning(png_ptr, ++ "Ignoring attempt to set acTL with num_frames > 2^31-1"); ++ return (0); ++ } ++ if (num_plays > PNG_UINT_31_MAX) ++ { ++ png_warning(png_ptr, ++ "Ignoring attempt to set acTL with num_plays " ++ "> 2^31-1"); ++ return (0); ++ } ++ ++ info_ptr->num_frames = num_frames; ++ info_ptr->num_plays = num_plays; ++ ++ info_ptr->valid |= PNG_INFO_acTL; ++ ++ return (1); ++} ++ ++/* delay_num and delay_den can hold any 16-bit values including zero */ ++png_uint_32 PNGAPI ++png_set_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, ++ png_byte dispose_op, png_byte blend_op) ++{ ++ png_debug1(1, "in %s storage function\n", "fcTL"); ++ ++ if (png_ptr == NULL || info_ptr == NULL) ++ { ++ png_warning(png_ptr, ++ "Call to png_set_fcTL() with NULL png_ptr or info_ptr " ++ "ignored"); ++ return (0); ++ } ++ ++ png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset, ++ delay_num, delay_den, dispose_op, blend_op); ++ ++ info_ptr->next_frame_width = width; ++ info_ptr->next_frame_height = height; ++ info_ptr->next_frame_x_offset = x_offset; ++ info_ptr->next_frame_y_offset = y_offset; ++ info_ptr->next_frame_delay_num = delay_num; ++ info_ptr->next_frame_delay_den = delay_den; ++ info_ptr->next_frame_dispose_op = dispose_op; ++ info_ptr->next_frame_blend_op = blend_op; ++ ++ info_ptr->valid |= PNG_INFO_fcTL; ++ ++ return (1); ++} ++ ++void /* PRIVATE */ ++png_ensure_fcTL_is_valid(png_structp png_ptr, ++ png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, ++ png_byte dispose_op, png_byte blend_op) ++{ ++ if (width + x_offset > png_ptr->first_frame_width || ++ height + y_offset > png_ptr->first_frame_height) ++ png_error(png_ptr, "dimensions of a frame are greater than" ++ "the ones in IHDR"); ++ if (width > PNG_UINT_31_MAX) ++ png_error(png_ptr, "invalid width in fcTL (> 2^31-1)"); ++ if (height > PNG_UINT_31_MAX) ++ png_error(png_ptr, "invalid height in fcTL (> 2^31-1)"); ++ if (x_offset > PNG_UINT_31_MAX) ++ png_error(png_ptr, "invalid x_offset in fcTL (> 2^31-1)"); ++ if (y_offset > PNG_UINT_31_MAX) ++ png_error(png_ptr, "invalid y_offset in fcTL (> 2^31-1)"); ++ ++ if (dispose_op != PNG_DISPOSE_OP_NONE && ++ dispose_op != PNG_DISPOSE_OP_BACKGROUND && ++ dispose_op != PNG_DISPOSE_OP_PREVIOUS) ++ png_error(png_ptr, "invalid dispose_op in fcTL"); ++ ++ if (blend_op != PNG_BLEND_OP_SOURCE && ++ blend_op != PNG_BLEND_OP_OVER) ++ png_error(png_ptr, "invalid blend_op in fcTL"); ++ ++ if (blend_op == PNG_BLEND_OP_OVER) { ++ if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) ++ png_error(png_ptr, "PNG_BLEND_OP_OVER is not valid for " ++ "color type 'greyscale without alpha'"); ++ else if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) && ++ !(png_ptr->color_type & PNG_COLOR_MASK_ALPHA)) ++ png_error(png_ptr, "PNG_BLEND_OP_OVER is not valid for " ++ "color type 'truecolor without alpha'"); ++ } ++} ++ ++png_uint_32 PNGAPI ++png_set_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr, ++ png_byte is_hidden) ++{ ++ png_debug(1, "in png_first_frame_is_hidden()\n"); ++ ++ if (png_ptr == NULL) ++ return 0; ++ ++ if(is_hidden) ++ png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN; ++ else ++ png_ptr->apng_flags &= ~PNG_FIRST_FRAME_HIDDEN; ++ ++ return 1; ++} ++#endif /* PNG_APNG_SUPPORTED */ ++ + #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) + void PNGAPI + png_set_unknown_chunks(png_structp png_ptr, +diff -ruN libpng-1.2.27/pngtrans.c libpng-1.2.27.apng/pngtrans.c +--- libpng-1.2.27/pngtrans.c 2008-04-30 10:23:14.000000000 +0000 ++++ libpng-1.2.27.apng/pngtrans.c 2008-05-01 09:49:58.000000000 +0000 +@@ -652,11 +652,10 @@ + png_voidp PNGAPI + png_get_user_transform_ptr(png_structp png_ptr) + { +-#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) + if (png_ptr == NULL) return (NULL); ++#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED) + return ((png_voidp)png_ptr->user_transform_ptr); +-#else +- return (NULL); + #endif ++ return (NULL); + } + #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ +diff -ruN libpng-1.2.27/pngwrite.c libpng-1.2.27.apng/pngwrite.c +--- libpng-1.2.27/pngwrite.c 2008-04-30 10:23:14.000000000 +0000 ++++ libpng-1.2.27.apng/pngwrite.c 2008-05-01 09:49:58.000000000 +0000 +@@ -263,6 +263,10 @@ + } + } + #endif ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ if (info_ptr->valid & PNG_INFO_acTL) ++ png_write_acTL(png_ptr, info_ptr->num_frames, info_ptr->num_plays); ++#endif + #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) + if (info_ptr->unknown_chunks_num) + { +@@ -301,6 +305,10 @@ + return; + if (!(png_ptr->mode & PNG_HAVE_IDAT)) + png_error(png_ptr, "No IDATs written into file"); ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ if (png_ptr->num_frames_written != png_ptr->num_frames_to_write) ++ png_error(png_ptr, "Not enough frames written"); ++#endif + + /* see if user wants us to write information chunks */ + if (info_ptr != NULL) +@@ -1529,4 +1537,39 @@ + params = params; + } + #endif ++ ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++void PNGAPI ++png_write_frame_head(png_structp png_ptr, png_infop info_ptr, ++ png_bytepp row_pointers, png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, ++ png_byte blend_op) ++{ ++ png_debug(1, "in png_write_frame_head\n"); ++ ++ /* there is a chance this has been set after png_write_info was called, ++ * so it would be set but not written. is there a way to be sure? */ ++ if (!(info_ptr->valid & PNG_INFO_acTL)) ++ png_error(png_ptr, "png_write_frame_head(): acTL not set"); ++ ++ png_write_reset(png_ptr); ++ ++ png_write_reinit(png_ptr, info_ptr, width, height); ++ ++ if ( !(png_ptr->num_frames_written == 0 && ++ (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN) ) ) ++ png_write_fcTL(png_ptr, width, height, x_offset, y_offset, ++ delay_num, delay_den, dispose_op, blend_op); ++} ++ ++void PNGAPI ++png_write_frame_tail(png_structp png_ptr, png_infop png_info) ++{ ++ png_debug(1, "in png_write_frame_tail\n"); ++ ++ png_ptr->num_frames_written++; ++} ++#endif /* PNG_WRITE_APNG_SUPPORTED */ ++ + #endif /* PNG_WRITE_SUPPORTED */ +diff -ruN libpng-1.2.27/pngwutil.c libpng-1.2.27.apng/pngwutil.c +--- libpng-1.2.27/pngwutil.c 2008-04-30 10:23:14.000000000 +0000 ++++ libpng-1.2.27.apng/pngwutil.c 2008-05-01 09:49:58.000000000 +0000 +@@ -498,6 +498,11 @@ + /* write the chunk */ + png_write_chunk(png_ptr, png_IHDR, buf, (png_size_t)13); + ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ png_ptr->first_frame_width = width; ++ png_ptr->first_frame_height = height; ++#endif ++ + /* initialize zlib with PNG info */ + png_ptr->zstream.zalloc = png_zalloc; + png_ptr->zstream.zfree = png_zfree; +@@ -619,6 +624,9 @@ + { + #ifdef PNG_USE_LOCAL_ARRAYS + PNG_IDAT; ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ PNG_fdAT; ++#endif + #endif + png_debug(1, "in png_write_IDAT\n"); + +@@ -661,7 +669,28 @@ + "Invalid zlib compression method or flags in IDAT"); + } + +- png_write_chunk(png_ptr, png_IDAT, data, length); ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ if(png_ptr->num_frames_written == 0) ++#endif ++ png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length); ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ else ++ { ++ png_byte buf[4]; ++ ++ png_write_chunk_start(png_ptr, (png_bytep)png_fdAT, 4 + length); ++ ++ png_save_uint_32(buf, png_ptr->next_seq_num); ++ png_write_chunk_data(png_ptr, buf, 4); ++ ++ png_write_chunk_data(png_ptr, data, length); ++ ++ png_write_chunk_end(png_ptr); ++ ++ png_ptr->next_seq_num++; ++ } ++#endif ++ + png_ptr->mode |= PNG_HAVE_IDAT; + } + +@@ -673,7 +702,7 @@ + PNG_IEND; + #endif + png_debug(1, "in png_write_IEND\n"); +- png_write_chunk(png_ptr, png_IEND, png_bytep_NULL, ++ png_write_chunk(png_ptr, (png_bytep)png_IEND, png_bytep_NULL, + (png_size_t)0); + png_ptr->mode |= PNG_HAVE_IEND; + } +@@ -1732,6 +1761,70 @@ + } + #endif + ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++void /* PRIVATE */ ++png_write_acTL(png_structp png_ptr, ++ png_uint_32 num_frames, png_uint_32 num_plays) ++{ ++#ifdef PNG_USE_LOCAL_ARRAYS ++ PNG_acTL; ++#endif ++ png_byte data[16]; ++ ++ png_debug(1, "in png_write_acTL\n"); ++ ++ png_ptr->num_frames_to_write = num_frames; ++ ++ if (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN) ++ num_frames--; ++ ++ png_save_uint_32(data, num_frames); ++ png_save_uint_32(data + 4, num_plays); ++ ++ png_write_chunk(png_ptr, (png_bytep)png_acTL, data, (png_size_t)8); ++} ++ ++void /* PRIVATE */ ++png_write_fcTL(png_structp png_ptr, png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, ++ png_byte blend_op) ++{ ++#ifdef PNG_USE_LOCAL_ARRAYS ++ PNG_fcTL; ++#endif ++ png_byte data[26]; ++ ++ png_debug(1, "in png_write_fcTL\n"); ++ ++ if (png_ptr->num_frames_written == 0 && (x_offset != 0 || y_offset != 0)) ++ png_error(png_ptr, "x and/or y offset for the first frame aren't 0\n"); ++ if (png_ptr->num_frames_written == 0 && ++ (width != png_ptr->first_frame_width || ++ height != png_ptr->first_frame_height)) ++ png_error(png_ptr, "width and/or height in the first frame's fcTL " ++ "don't match the ones in IHDR\n"); ++ ++ /* more error checking */ ++ png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset, ++ delay_num, delay_den, dispose_op, blend_op); ++ ++ png_save_uint_32(data, png_ptr->next_seq_num); ++ png_save_uint_32(data + 4, width); ++ png_save_uint_32(data + 8, height); ++ png_save_uint_32(data + 12, x_offset); ++ png_save_uint_32(data + 16, y_offset); ++ png_save_uint_16(data + 20, delay_num); ++ png_save_uint_16(data + 22, delay_den); ++ data[24] = dispose_op; ++ data[25] = blend_op; ++ ++ png_write_chunk(png_ptr, (png_bytep)png_fcTL, data, (png_size_t)26); ++ ++ png_ptr->next_seq_num++; ++} ++#endif /* PNG_WRITE_APNG_SUPPORTED */ ++ + /* initializes the row writing capability of libpng */ + void /* PRIVATE */ + png_write_start_row(png_structp png_ptr) +@@ -2799,4 +2892,39 @@ + } + #endif + } ++ ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++void /* PRIVATE */ ++png_write_reset(png_structp png_ptr) ++{ ++ png_ptr->row_number = 0; ++ png_ptr->pass = 0; ++ png_ptr->mode &= ~PNG_HAVE_IDAT; ++} ++ ++void /* PRIVATE */ ++png_write_reinit(png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 width, png_uint_32 height) ++{ ++ if (png_ptr->num_frames_written == 0 && ++ (width != png_ptr->first_frame_width || ++ height != png_ptr->first_frame_height)) ++ png_error(png_ptr, "width and/or height in the first frame's fcTL " ++ "don't match the ones in IHDR\n"); ++ if (width > png_ptr->first_frame_width || ++ height > png_ptr->first_frame_height) ++ png_error(png_ptr, "width and/or height for a frame greater than" ++ "the ones in IHDR"); ++ ++ png_set_IHDR(png_ptr, info_ptr, width, height, ++ info_ptr->bit_depth, info_ptr->color_type, ++ info_ptr->interlace_type, info_ptr->compression_type, ++ info_ptr->filter_type); ++ ++ png_ptr->width = width; ++ png_ptr->height = height; ++ png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width); ++ png_ptr->usr_width = png_ptr->width; ++} ++#endif + #endif /* PNG_WRITE_SUPPORTED */ diff --git a/abs/core-testing/libpng/libpng-1.2.31-apng.patch b/abs/core-testing/libpng/libpng-1.2.31-apng.patch new file mode 100644 index 0000000..92bd20a --- /dev/null +++ b/abs/core-testing/libpng/libpng-1.2.31-apng.patch @@ -0,0 +1,1644 @@ +Index: pngread.c +=================================================================== +--- pngread.c (révision 149) ++++ pngread.c (copie de travail) +@@ -407,6 +407,11 @@ + #if defined(PNG_READ_zTXt_SUPPORTED) + PNG_CONST PNG_zTXt; + #endif ++#if defined(PNG_READ_APNG_SUPPORTED) ++ PNG_CONST PNG_acTL; ++ PNG_CONST PNG_fcTL; ++ PNG_CONST PNG_fdAT; ++#endif + #endif /* PNG_USE_LOCAL_ARRAYS */ + png_uint_32 length = png_read_chunk_header(png_ptr); + PNG_CONST png_bytep chunk_name = png_ptr->chunk_name; +@@ -451,6 +456,9 @@ + !(png_ptr->mode & PNG_HAVE_PLTE)) + png_error(png_ptr, "Missing PLTE before IDAT"); + ++#if defined(PNG_READ_APNG_SUPPORTED) ++ png_have_info(png_ptr, info_ptr); ++#endif + png_ptr->idat_size = length; + png_ptr->mode |= PNG_HAVE_IDAT; + break; +@@ -523,12 +531,97 @@ + else if (!png_memcmp(chunk_name, png_iTXt, 4)) + png_handle_iTXt(png_ptr, info_ptr, length); + #endif ++#if defined(PNG_READ_APNG_SUPPORTED) ++ else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4)) ++ png_handle_acTL(png_ptr, info_ptr, length); ++ else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) ++ png_handle_fcTL(png_ptr, info_ptr, length); ++ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) ++ png_handle_fdAT(png_ptr, info_ptr, length); ++#endif + else + png_handle_unknown(png_ptr, info_ptr, length); + } + } + #endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */ + ++#if defined(PNG_READ_APNG_SUPPORTED) ++void PNGAPI ++png_read_frame_head(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_byte have_chunk_after_DAT; /* after IDAT or after fdAT */ ++ ++ png_debug(0, "Reading frame head\n"); ++ ++ if (!(png_ptr->mode & PNG_HAVE_acTL)) ++ png_error(png_ptr, "attempt to png_read_frame_head() but " ++ "no acTL present"); ++ ++ /* do nothing for the main IDAT */ ++ if (png_ptr->num_frames_read == 0) ++ return; ++ ++ png_crc_finish(png_ptr, 0); /* CRC from last IDAT or fdAT chunk */ ++ ++ png_read_reset(png_ptr); ++ png_ptr->mode &= ~PNG_HAVE_fcTL; ++ ++ have_chunk_after_DAT = 0; ++ for (;;) ++ { ++#ifdef PNG_USE_LOCAL_ARRAYS ++ PNG_IDAT; ++ PNG_fdAT; ++ PNG_fcTL; ++#endif ++ png_byte chunk_length[4]; ++ png_uint_32 length; ++ ++ png_read_data(png_ptr, chunk_length, 4); ++ length = png_get_uint_31(png_ptr, chunk_length); ++ ++ png_reset_crc(png_ptr); ++ png_crc_read(png_ptr, png_ptr->chunk_name, 4); ++ ++ if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) ++ { ++ /* discard trailing IDATs for the first frame */ ++ if (have_chunk_after_DAT || png_ptr->num_frames_read > 1) ++ png_error(png_ptr, "png_read_frame_head(): out of place IDAT"); ++ png_crc_finish(png_ptr, length); ++ } ++ else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) ++ { ++ png_handle_fcTL(png_ptr, info_ptr, length); ++ have_chunk_after_DAT = 1; ++ } ++ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) ++ { ++ png_ensure_sequence_number(png_ptr, length); ++ ++ /* discard trailing fdATs for frames other than the first */ ++ if (!have_chunk_after_DAT && png_ptr->num_frames_read > 1) ++ png_crc_finish(png_ptr, length - 4); ++ else if(png_ptr->mode & PNG_HAVE_fcTL) ++ { ++ png_ptr->idat_size = length - 4; ++ png_ptr->mode |= PNG_HAVE_IDAT; ++ ++ break; ++ } ++ else ++ png_error(png_ptr, "png_read_frame_head(): out of place fdAT"); ++ } ++ else ++ { ++ png_warning(png_ptr, "Skipped (ignored) a chunk " ++ "between APNG chunks"); ++ png_crc_finish(png_ptr, length); ++ } ++ } ++} ++#endif /* PNG_READ_APNG_SUPPORTED */ ++ + /* optional call to update the users info_ptr structure */ + void PNGAPI + png_read_update_info(png_structp png_ptr, png_infop info_ptr) +@@ -565,6 +658,10 @@ + { + #ifdef PNG_USE_LOCAL_ARRAYS + PNG_CONST PNG_IDAT; ++#if defined(PNG_READ_APNG_SUPPORTED) ++ PNG_CONST PNG_fdAT; ++ PNG_CONST PNG_IEND; ++#endif + PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, + 0xff}; + PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; +@@ -694,13 +791,40 @@ + { + if (!(png_ptr->zstream.avail_in)) + { +- while (!png_ptr->idat_size) ++ png_uint_32 bytes_to_skip = 0; ++ ++ while (!png_ptr->idat_size || bytes_to_skip != 0) + { +- png_crc_finish(png_ptr, 0); ++ png_crc_finish(png_ptr, bytes_to_skip); ++ bytes_to_skip = 0; + + png_ptr->idat_size = png_read_chunk_header(png_ptr); ++ ++#if defined(PNG_READ_APNG_SUPPORTED) ++ if (png_ptr->num_frames_read == 0) ++ { ++#endif + if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) + png_error(png_ptr, "Not enough image data"); ++#if defined(PNG_READ_APNG_SUPPORTED) ++ } ++ else ++ { ++ if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) ++ png_error(png_ptr, "Not enough image data"); ++ if (png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) ++ { ++ png_warning(png_ptr, "Skipped (ignored) a chunk " ++ "between APNG chunks"); ++ bytes_to_skip = png_ptr->idat_size; ++ continue; ++ } ++ ++ png_ensure_sequence_number(png_ptr, png_ptr->idat_size); ++ ++ png_ptr->idat_size -= 4; ++ } ++#endif + } + png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; + png_ptr->zstream.next_in = png_ptr->zbuf; +@@ -718,6 +842,9 @@ + png_error(png_ptr, "Extra compressed data"); + png_ptr->mode |= PNG_AFTER_IDAT; + png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; ++#if defined(PNG_READ_APNG_SUPPORTED) ++ png_ptr->num_frames_read++; ++#endif + break; + } + if (ret != Z_OK) +@@ -969,6 +1096,11 @@ + #if defined(PNG_READ_zTXt_SUPPORTED) + PNG_CONST PNG_zTXt; + #endif ++#if defined(PNG_READ_APNG_SUPPORTED) ++ PNG_CONST PNG_acTL; ++ PNG_CONST PNG_fcTL; ++ PNG_CONST PNG_fdAT; ++#endif + #endif /* PNG_USE_LOCAL_ARRAYS */ + png_uint_32 length = png_read_chunk_header(png_ptr); + PNG_CONST png_bytep chunk_name = png_ptr->chunk_name; +@@ -1069,6 +1201,14 @@ + else if (!png_memcmp(chunk_name, png_iTXt, 4)) + png_handle_iTXt(png_ptr, info_ptr, length); + #endif ++#if defined(PNG_READ_APNG_SUPPORTED) ++ else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4)) ++ png_handle_acTL(png_ptr, info_ptr, length); ++ else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) ++ png_handle_fcTL(png_ptr, info_ptr, length); ++ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) ++ png_handle_fdAT(png_ptr, info_ptr, length); ++#endif + else + png_handle_unknown(png_ptr, info_ptr, length); + } while (!(png_ptr->mode & PNG_HAVE_IEND)); +Index: pngget.c +=================================================================== +--- pngget.c (révision 149) ++++ pngget.c (copie de travail) +@@ -797,6 +797,167 @@ + } + #endif + ++#if defined(PNG_APNG_SUPPORTED) ++png_uint_32 PNGAPI ++png_get_acTL(png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 *num_frames, png_uint_32 *num_plays) ++{ ++ png_debug1(1, "in %s retrieval function\n", "acTL"); ++ ++ if (png_ptr != NULL && info_ptr != NULL && ++ (info_ptr->valid & PNG_INFO_acTL) && ++ num_frames != NULL && num_plays != NULL) ++ { ++ *num_frames = info_ptr->num_frames; ++ *num_plays = info_ptr->num_plays; ++ return (1); ++ } ++ ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_num_frames(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_num_frames()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->num_frames); ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_num_plays(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_num_plays()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->num_plays); ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 *width, png_uint_32 *height, ++ png_uint_32 *x_offset, png_uint_32 *y_offset, ++ png_uint_16 *delay_num, png_uint_16 *delay_den, ++ png_byte *dispose_op, png_byte *blend_op) ++{ ++ png_debug1(1, "in %s retrieval function\n", "fcTL"); ++ ++ if (png_ptr != NULL && info_ptr != NULL && ++ (info_ptr->valid & PNG_INFO_fcTL) && ++ width != NULL && height != NULL && ++ x_offset != NULL && x_offset != NULL && ++ delay_num != NULL && delay_den != NULL && ++ dispose_op != NULL && blend_op != NULL) ++ { ++ *width = info_ptr->next_frame_width; ++ *height = info_ptr->next_frame_height; ++ *x_offset = info_ptr->next_frame_x_offset; ++ *y_offset = info_ptr->next_frame_y_offset; ++ *delay_num = info_ptr->next_frame_delay_num; ++ *delay_den = info_ptr->next_frame_delay_den; ++ *dispose_op = info_ptr->next_frame_dispose_op; ++ *blend_op = info_ptr->next_frame_blend_op; ++ return (1); ++ } ++ ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_next_frame_width(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_width()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_width); ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_next_frame_height(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_height()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_height); ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_next_frame_x_offset(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_x_offset()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_x_offset); ++ return (0); ++} ++ ++png_uint_32 PNGAPI ++png_get_next_frame_y_offset(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_y_offset()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_y_offset); ++ return (0); ++} ++ ++png_uint_16 PNGAPI ++png_get_next_frame_delay_num(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_delay_num()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_delay_num); ++ return (0); ++} ++ ++png_uint_16 PNGAPI ++png_get_next_frame_delay_den(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_delay_den()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_delay_den); ++ return (0); ++} ++ ++png_byte PNGAPI ++png_get_next_frame_dispose_op(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_dispose_op()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_dispose_op); ++ return (0); ++} ++ ++png_byte PNGAPI ++png_get_next_frame_blend_op(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_get_next_frame_blend_op()\n"); ++ ++ if (png_ptr != NULL && info_ptr != NULL) ++ return (info_ptr->next_frame_blend_op); ++ return (0); ++} ++ ++png_byte PNGAPI ++png_get_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_first_frame_is_hidden()\n"); ++ ++ if (png_ptr != NULL) ++ return (png_byte)(png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN); ++ ++ return 0; ++} ++#endif /* PNG_APNG_SUPPORTED */ ++ + #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) + png_uint_32 PNGAPI + png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr, +Index: png.c +=================================================================== +--- png.c (révision 149) ++++ png.c (copie de travail) +@@ -51,6 +51,9 @@ + PNG_tIME; + PNG_tRNS; + PNG_zTXt; ++PNG_acTL; ++PNG_fcTL; ++PNG_fdAT; + + #ifdef PNG_READ_SUPPORTED + /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */ +Index: png.h +=================================================================== +--- png.h (révision 149) ++++ png.h (copie de travail) +@@ -949,6 +949,19 @@ + png_fixed_point int_y_blue; + #endif + ++#if defined(PNG_APNG_SUPPORTED) ++ png_uint_32 num_frames; /* including default image */ ++ png_uint_32 num_plays; ++ png_uint_32 next_frame_width; ++ png_uint_32 next_frame_height; ++ png_uint_32 next_frame_x_offset; ++ png_uint_32 next_frame_y_offset; ++ png_uint_16 next_frame_delay_num; ++ png_uint_16 next_frame_delay_den; ++ png_byte next_frame_dispose_op; ++ png_byte next_frame_blend_op; ++#endif ++ + } png_info; + + typedef png_info FAR * png_infop; +@@ -1050,6 +1063,8 @@ + #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ + #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ + #define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */ ++#define PNG_INFO_acTL 0x10000L ++#define PNG_INFO_fcTL 0x20000L + + /* This is used for the transformation routines, as some of them + * change these values for the row. It also should enable using +@@ -1090,7 +1105,11 @@ + typedef void (PNGAPI *png_progressive_end_ptr) PNGARG((png_structp, png_infop)); + typedef void (PNGAPI *png_progressive_row_ptr) PNGARG((png_structp, png_bytep, + png_uint_32, int)); ++#if defined(PNG_APNG_SUPPORTED) ++typedef void (PNGAPI *png_progressive_frame_ptr) PNGARG((png_structp, ++ png_uint_32)); + #endif ++#endif + + #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ + defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \ +@@ -1421,6 +1440,39 @@ + png_uint_32 user_height_max; + #endif + ++#if defined(PNG_APNG_SUPPORTED) ++ png_uint_32 apng_flags; ++ png_uint_32 next_seq_num; /* next fcTL/fdAT chunk sequence number */ ++ png_uint_32 first_frame_width; ++ png_uint_32 first_frame_height; ++ ++#if defined(PNG_READ_APNG_SUPPORTED) ++ png_uint_32 num_frames_read; /* incremented after all image data of */ ++ /* a frame is read */ ++#ifdef PNG_PROGRESSIVE_READ_SUPPORTED ++ png_progressive_frame_ptr frame_info_fn; /* frame info read callback */ ++ png_progressive_frame_ptr frame_end_fn; /* frame data read callback */ ++#endif ++#endif ++ ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ png_uint_32 num_frames_to_write; ++ png_uint_32 num_frames_written; ++#endif ++#endif ++ ++/* For png_struct.apng_flags: */ ++#define PNG_FIRST_FRAME_HIDDEN 0x0001 ++ ++/* dispose_op flags from inside fcTL */ ++#define PNG_DISPOSE_OP_NONE 0x00 ++#define PNG_DISPOSE_OP_BACKGROUND 0x01 ++#define PNG_DISPOSE_OP_PREVIOUS 0x02 ++ ++/* blend_op flags from inside fcTL */ ++#define PNG_BLEND_OP_SOURCE 0x00 ++#define PNG_BLEND_OP_OVER 0x01 ++ + /* New member added in libpng-1.0.25 and 1.2.17 */ + #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) + /* storage for unknown chunk that the library doesn't recognize. */ +@@ -1747,6 +1799,18 @@ + extern PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr, + png_bytepp image)); + ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++extern PNG_EXPORT (void,png_write_frame_head) PNGARG((png_structp png_ptr, ++ png_infop png_info, png_bytepp row_pointers, ++ png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, ++ png_byte blend_op)); ++ ++extern PNG_EXPORT (void,png_write_frame_tail) PNGARG((png_structp png_ptr, ++ png_infop png_info)); ++#endif ++ + /* writes the end of the PNG file. */ + extern PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr, + png_infop info_ptr)); +@@ -1995,6 +2059,11 @@ + png_voidp progressive_ptr, + png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, + png_progressive_end_ptr end_fn)); ++#if defined(PNG_READ_APNG_SUPPORTED) ++extern PNG_EXPORT(void,png_set_progressive_frame_fn) PNGARG((png_structp png_ptr, ++ png_progressive_frame_ptr frame_info_fn, ++ png_progressive_frame_ptr frame_end_fn)); ++#endif + + /* returns the user pointer associated with the push read functions */ + extern PNG_EXPORT(png_voidp,png_get_progressive_ptr) +@@ -2432,6 +2501,59 @@ + #endif + #endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */ + ++#if defined(PNG_APNG_SUPPORTED) ++extern PNG_EXPORT(png_uint_32,png_get_acTL) PNGARG((png_structp png_ptr, ++ png_infop info_ptr, png_uint_32 *num_frames, png_uint_32 *num_plays)); ++extern PNG_EXPORT(png_uint_32,png_set_acTL) PNGARG((png_structp png_ptr, ++ png_infop info_ptr, png_uint_32 num_frames, png_uint_32 num_plays)); ++extern PNG_EXPORT(png_uint_32,png_get_num_frames) PNGARG((png_structp png_ptr, ++ png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_32,png_get_num_plays) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++ ++extern PNG_EXPORT(png_uint_32,png_get_next_frame_fcTL) ++ PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 *width, ++ png_uint_32 *height, png_uint_32 *x_offset, png_uint_32 *y_offset, ++ png_uint_16 *delay_num, png_uint_16 *delay_den, png_byte *dispose_op, ++ png_byte *blend_op)); ++extern PNG_EXPORT(png_uint_32,png_set_next_frame_fcTL) ++ PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 width, ++ png_uint_32 height, png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, ++ png_byte blend_op)); ++extern PNG_EXPORT(void,png_ensure_fcTL_is_valid) ++ PNGARG((png_structp png_ptr, ++ png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, ++ png_byte dispose_op, png_byte blend_op)); ++extern PNG_EXPORT(png_uint_32,png_get_next_frame_width) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_32,png_get_next_frame_height) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_32,png_get_next_frame_x_offset) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_32,png_get_next_frame_y_offset) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_16,png_get_next_frame_delay_num) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_16,png_get_next_frame_delay_den) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_byte,png_get_next_frame_dispose_op) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_byte,png_get_next_frame_blend_op) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_byte,png_get_first_frame_is_hidden) ++ PNGARG((png_structp png_ptr, png_infop info_ptr)); ++extern PNG_EXPORT(png_uint_32,png_set_first_frame_is_hidden) ++ PNGARG((png_structp png_ptr, png_infop info_ptr, png_byte is_hidden)); ++#endif /* PNG_APNG_SUPPORTED */ ++ ++#if defined(PNG_READ_APNG_SUPPORTED) ++extern PNG_EXPORT(void,png_read_frame_head) PNGARG((png_structp png_ptr, ++ png_infop info_ptr)); ++#endif ++ + #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) + /* provide a list of chunks and how they are to be handled, if the built-in + handling or default unknown chunk handling is not desired. Any chunks not +@@ -2738,6 +2860,8 @@ + #define PNG_BACKGROUND_IS_GRAY 0x800 + #define PNG_HAVE_PNG_SIGNATURE 0x1000 + #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ ++#define PNG_HAVE_acTL 0x4000 ++#define PNG_HAVE_fcTL 0x8000L + + /* flags for the transformations the PNG library does on the image data */ + #define PNG_BGR 0x0001 +@@ -2878,6 +3002,9 @@ + #define PNG_tIME png_byte png_tIME[5] = {116, 73, 77, 69, '\0'} + #define PNG_tRNS png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'} + #define PNG_zTXt png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'} ++#define PNG_acTL png_byte png_acTL[5] = { 97, 99, 84, 76, '\0'} ++#define PNG_fcTL png_byte png_fcTL[5] = {102, 99, 84, 76, '\0'} ++#define PNG_fdAT png_byte png_fdAT[5] = {102, 100, 65, 84, '\0'} + + #ifdef PNG_USE_GLOBAL_ARRAYS + PNG_EXPORT_VAR (png_byte FARDATA) png_IHDR[5]; +@@ -2901,6 +3028,9 @@ + PNG_EXPORT_VAR (png_byte FARDATA) png_tIME[5]; + PNG_EXPORT_VAR (png_byte FARDATA) png_tRNS[5]; + PNG_EXPORT_VAR (png_byte FARDATA) png_zTXt[5]; ++PNG_EXPORT_VAR (png_byte FARDATA) png_acTL[5]; ++PNG_EXPORT_VAR (png_byte FARDATA) png_fcTL[5]; ++PNG_EXPORT_VAR (png_byte FARDATA) png_fdAT[5]; + #endif /* PNG_USE_GLOBAL_ARRAYS */ + + #if defined(PNG_1_0_X) || defined (PNG_1_2_X) +@@ -3175,6 +3305,17 @@ + #endif + #endif + ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++PNG_EXTERN void png_write_acTL PNGARG((png_structp png_ptr, ++ png_uint_32 num_frames, png_uint_32 num_plays)); ++ ++PNG_EXTERN void png_write_fcTL PNGARG((png_structp png_ptr, ++ png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, ++ png_byte dispose_op, png_byte blend_op)); ++#endif ++ + /* Called when finished processing a row of data */ + PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)); + +@@ -3226,6 +3367,20 @@ + PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, + png_infop info_ptr)); + ++#if defined(PNG_READ_APNG_SUPPORTED) ++/* private, reset some things to become ready for reading next frame */ ++PNG_EXTERN void png_read_reset PNGARG((png_structp png_ptr)); ++PNG_EXTERN void png_read_reinit PNGARG((png_structp png_ptr, ++ png_infop info_ptr)); ++PNG_EXTERN void png_progressive_read_reset PNGARG((png_structp png_ptr)); ++#endif ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++/* private, reset some things to become ready for writing next frame */ ++PNG_EXTERN void png_write_reset PNGARG((png_structp png_ptr)); ++PNG_EXTERN void png_write_reinit PNGARG((png_structp png_ptr, ++ png_infop info_ptr, png_uint_32 width, png_uint_32 height)); ++#endif ++ + /* these are the functions that do the transformations */ + #if defined(PNG_READ_FILLER_SUPPORTED) + PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, +@@ -3441,6 +3596,18 @@ + png_uint_32 length)); + #endif + ++#if defined(PNG_READ_APNG_SUPPORTED) ++PNG_EXTERN void png_handle_acTL PNGARG((png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 length)); ++PNG_EXTERN void png_handle_fcTL PNGARG((png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 length)); ++PNG_EXTERN void png_have_info PNGARG((png_structp png_ptr, png_infop info_ptr)); ++PNG_EXTERN void png_handle_fdAT PNGARG((png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 length)); ++PNG_EXTERN void png_ensure_sequence_number PNGARG((png_structp png_ptr, ++ png_uint_32 length)); ++#endif ++ + PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, + png_infop info_ptr, png_uint_32 length)); + +Index: pngwrite.c +=================================================================== +--- pngwrite.c (révision 149) ++++ pngwrite.c (copie de travail) +@@ -261,6 +261,10 @@ + } + } + #endif ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ if (info_ptr->valid & PNG_INFO_acTL) ++ png_write_acTL(png_ptr, info_ptr->num_frames, info_ptr->num_plays); ++#endif + #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) + if (info_ptr->unknown_chunks_num) + { +@@ -299,6 +303,10 @@ + return; + if (!(png_ptr->mode & PNG_HAVE_IDAT)) + png_error(png_ptr, "No IDATs written into file"); ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ if (png_ptr->num_frames_written != png_ptr->num_frames_to_write) ++ png_error(png_ptr, "Not enough frames written"); ++#endif + + /* see if user wants us to write information chunks */ + if (info_ptr != NULL) +@@ -1527,4 +1535,39 @@ + params = params; + } + #endif ++ ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++void PNGAPI ++png_write_frame_head(png_structp png_ptr, png_infop info_ptr, ++ png_bytepp row_pointers, png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, ++ png_byte blend_op) ++{ ++ png_debug(1, "in png_write_frame_head\n"); ++ ++ /* there is a chance this has been set after png_write_info was called, ++ * so it would be set but not written. is there a way to be sure? */ ++ if (!(info_ptr->valid & PNG_INFO_acTL)) ++ png_error(png_ptr, "png_write_frame_head(): acTL not set"); ++ ++ png_write_reset(png_ptr); ++ ++ png_write_reinit(png_ptr, info_ptr, width, height); ++ ++ if ( !(png_ptr->num_frames_written == 0 && ++ (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN) ) ) ++ png_write_fcTL(png_ptr, width, height, x_offset, y_offset, ++ delay_num, delay_den, dispose_op, blend_op); ++} ++ ++void PNGAPI ++png_write_frame_tail(png_structp png_ptr, png_infop png_info) ++{ ++ png_debug(1, "in png_write_frame_tail\n"); ++ ++ png_ptr->num_frames_written++; ++} ++#endif /* PNG_WRITE_APNG_SUPPORTED */ ++ + #endif /* PNG_WRITE_SUPPORTED */ +Index: pngconf.h +=================================================================== +--- pngconf.h (révision 149) ++++ pngconf.h (copie de travail) +@@ -925,6 +925,10 @@ + # define PNG_READ_zTXt_SUPPORTED + # define PNG_zTXt_SUPPORTED + #endif ++#ifndef PNG_NO_READ_APNG ++# define PNG_READ_APNG_SUPPORTED ++# define PNG_APNG_SUPPORTED ++#endif + #ifndef PNG_NO_READ_UNKNOWN_CHUNKS + # define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED + # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED +@@ -1067,6 +1071,12 @@ + # define PNG_zTXt_SUPPORTED + # endif + #endif ++#ifndef PNG_NO_WRITE_APNG ++# define PNG_WRITE_APNG_SUPPORTED ++# ifndef PNG_APNG_SUPPORTED ++# define PNG_APNG_SUPPORTED ++# endif ++#endif + #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS + # define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED + # ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED +Index: pngpread.c +=================================================================== +--- pngpread.c (révision 149) ++++ pngpread.c (copie de travail) +@@ -192,6 +192,11 @@ + #if defined(PNG_READ_zTXt_SUPPORTED) + PNG_CONST PNG_zTXt; + #endif ++#if defined(PNG_READ_APNG_SUPPORTED) ++ PNG_CONST PNG_acTL; ++ PNG_CONST PNG_fcTL; ++ PNG_CONST PNG_fdAT; ++#endif + #endif /* PNG_USE_LOCAL_ARRAYS */ + /* First we make sure we have enough data for the 4 byte chunk name + * and the 4 byte chunk length before proceeding with decoding the +@@ -215,7 +220,104 @@ + png_crc_read(png_ptr, png_ptr->chunk_name, 4); + png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; + } +- ++ ++#if defined(PNG_READ_APNG_SUPPORTED) ++ if (png_ptr->num_frames_read > 0 && ++ png_ptr->num_frames_read < info_ptr->num_frames) ++ { ++ if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) ++ { ++ /* discard trailing IDATs for the first frame */ ++ if (png_ptr->mode & PNG_HAVE_fcTL || png_ptr->num_frames_read > 1) ++ png_error(png_ptr, "out of place IDAT"); ++ ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_push_crc_skip(png_ptr, png_ptr->push_length); ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ return; ++ } ++ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) ++ { ++ if (png_ptr->buffer_size < 4) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_ensure_sequence_number(png_ptr, 4); ++ ++ if (!(png_ptr->mode & PNG_HAVE_fcTL)) ++ { ++ /* discard trailing fdATs for frames other than the first */ ++ if (png_ptr->num_frames_read < 2) ++ png_error(png_ptr, "out of place fdAT"); ++ ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_push_crc_skip(png_ptr, png_ptr->push_length); ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ return; ++ } ++ else ++ { ++ /* frame data follows */ ++ png_ptr->idat_size = png_ptr->push_length - 4; ++ png_ptr->mode |= PNG_HAVE_IDAT; ++ png_ptr->process_mode = PNG_READ_IDAT_MODE; ++ ++ return; ++ } ++ } ++ else if(!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) ++ { ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ ++ png_read_reset(png_ptr); ++ png_ptr->mode &= ~PNG_HAVE_fcTL; ++ ++ png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length); ++ ++ if (!(png_ptr->mode & PNG_HAVE_fcTL)) ++ png_error(png_ptr, "missing required fcTL chunk"); ++ ++ png_read_reinit(png_ptr, info_ptr); ++ png_progressive_read_reset(png_ptr); ++ ++ if (png_ptr->frame_info_fn != NULL) ++ (*(png_ptr->frame_info_fn))(png_ptr, png_ptr->num_frames_read); ++ ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ ++ return; ++ } ++ else ++ { ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_warning(png_ptr, "Skipped (ignored) a chunk " ++ "between APNG chunks"); ++ png_push_crc_skip(png_ptr, png_ptr->push_length); ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ return; ++ } ++ ++ return; ++ } ++#endif /* PNG_READ_APNG_SUPPORTED */ ++ + if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) + if(png_ptr->mode & PNG_AFTER_IDAT) + png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; +@@ -295,6 +397,9 @@ + png_error(png_ptr, "Too many IDAT's found"); + } + ++#if defined(PNG_READ_APNG_SUPPORTED) ++ png_have_info(png_ptr, info_ptr); ++#endif + png_ptr->idat_size = png_ptr->push_length; + png_ptr->mode |= PNG_HAVE_IDAT; + png_ptr->process_mode = PNG_READ_IDAT_MODE; +@@ -490,6 +595,35 @@ + png_push_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length); + } + #endif ++#if defined(PNG_READ_APNG_SUPPORTED) ++ else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4)) ++ { ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_handle_acTL(png_ptr, info_ptr, png_ptr->push_length); ++ } ++ else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) ++ { ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length); ++ } ++ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) ++ { ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_handle_fdAT(png_ptr, info_ptr, png_ptr->push_length); ++ } ++#endif /* PNG_READ_APNG_SUPPORTED */ + else + { + if (png_ptr->push_length + 4 > png_ptr->buffer_size) +@@ -660,13 +794,17 @@ + png_push_read_IDAT(png_structp png_ptr) + { + #ifdef PNG_USE_LOCAL_ARRAYS +- PNG_CONST PNG_IDAT; ++ PNG_IDAT; ++#if defined(PNG_READ_APNG_SUPPORTED) ++ PNG_fdAT; ++ PNG_IEND; + #endif ++#endif + if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) + { + png_byte chunk_length[4]; + +- if (png_ptr->buffer_size < 8) ++ if (png_ptr->buffer_size < 12) + { + png_push_save_buffer(png_ptr); + return; +@@ -678,15 +816,59 @@ + png_crc_read(png_ptr, png_ptr->chunk_name, 4); + png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; + +- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) ++#if defined(PNG_READ_APNG_SUPPORTED) ++ if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_fdAT, 4) ++ && png_ptr->num_frames_read > 0) + { ++ if (png_ptr->flags & PNG_FLAG_ZLIB_FINISHED) ++ { ++ png_ptr->process_mode = PNG_READ_CHUNK_MODE; ++ if (png_ptr->frame_end_fn != NULL) ++ (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read); ++ png_ptr->num_frames_read++; ++ return; ++ } ++ else ++ { ++ if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) ++ png_error(png_ptr, "Not enough image data"); ++ if (png_ptr->push_length + 4 > png_ptr->buffer_size) ++ { ++ png_push_save_buffer(png_ptr); ++ return; ++ } ++ png_warning(png_ptr, "Skipping (ignoring) a chunk between " ++ "APNG chunks"); ++ png_crc_finish(png_ptr, png_ptr->push_length); ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ return; ++ } ++ } ++ else ++#endif ++ if ( png_memcmp(png_ptr->chunk_name, png_IDAT, 4) ++ && (png_ptr->num_frames_read == 0) ) ++ { + png_ptr->process_mode = PNG_READ_CHUNK_MODE; + if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) + png_error(png_ptr, "Not enough compressed data"); ++#if defined(PNG_READ_APNG_SUPPORTED) ++ if (png_ptr->frame_end_fn != NULL) ++ (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read); ++ png_ptr->num_frames_read++; ++#endif + return; + } + + png_ptr->idat_size = png_ptr->push_length; ++ ++#if defined(PNG_READ_APNG_SUPPORTED) ++ if(png_ptr->num_frames_read > 0) ++ { ++ png_ensure_sequence_number(png_ptr, 4); ++ png_ptr->idat_size -= 4; ++ } ++#endif + } + if (png_ptr->idat_size && png_ptr->save_buffer_size) + { +@@ -1582,6 +1764,17 @@ + png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer); + } + ++#if defined(PNG_READ_APNG_SUPPORTED) ++void PNGAPI ++png_set_progressive_frame_fn(png_structp png_ptr, ++ png_progressive_frame_ptr frame_info_fn, ++ png_progressive_frame_ptr frame_end_fn) ++{ ++ png_ptr->frame_info_fn = frame_info_fn; ++ png_ptr->frame_end_fn = frame_end_fn; ++} ++#endif ++ + png_voidp PNGAPI + png_get_progressive_ptr(png_structp png_ptr) + { +Index: pngset.c +=================================================================== +--- pngset.c (révision 149) ++++ pngset.c (copie de travail) +@@ -363,6 +363,11 @@ + info_ptr->rowbytes = (png_size_t)0; + else + info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); ++ ++#if defined(PNG_APNG_SUPPORTED) ++ /* for non-animated png. this may be overritten from an acTL chunk later */ ++ info_ptr->num_frames = 1; ++#endif + } + + #if defined(PNG_oFFs_SUPPORTED) +@@ -1043,6 +1048,141 @@ + } + #endif /* PNG_sPLT_SUPPORTED */ + ++#if defined(PNG_APNG_SUPPORTED) ++png_uint_32 PNGAPI ++png_set_acTL(png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 num_frames, png_uint_32 num_plays) ++{ ++ png_debug1(1, "in %s storage function\n", "acTL"); ++ ++ if (png_ptr == NULL || info_ptr == NULL) ++ { ++ png_warning(png_ptr, ++ "Call to png_set_acTL() with NULL png_ptr " ++ "or info_ptr ignored"); ++ return (0); ++ } ++ if (num_frames == 0) ++ { ++ png_warning(png_ptr, ++ "Ignoring attempt to set acTL with num_frames zero"); ++ return (0); ++ } ++ if (num_frames > PNG_UINT_31_MAX) ++ { ++ png_warning(png_ptr, ++ "Ignoring attempt to set acTL with num_frames > 2^31-1"); ++ return (0); ++ } ++ if (num_plays > PNG_UINT_31_MAX) ++ { ++ png_warning(png_ptr, ++ "Ignoring attempt to set acTL with num_plays " ++ "> 2^31-1"); ++ return (0); ++ } ++ ++ info_ptr->num_frames = num_frames; ++ info_ptr->num_plays = num_plays; ++ ++ info_ptr->valid |= PNG_INFO_acTL; ++ ++ return (1); ++} ++ ++/* delay_num and delay_den can hold any 16-bit values including zero */ ++png_uint_32 PNGAPI ++png_set_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, ++ png_byte dispose_op, png_byte blend_op) ++{ ++ png_debug1(1, "in %s storage function\n", "fcTL"); ++ ++ if (png_ptr == NULL || info_ptr == NULL) ++ { ++ png_warning(png_ptr, ++ "Call to png_set_fcTL() with NULL png_ptr or info_ptr " ++ "ignored"); ++ return (0); ++ } ++ ++ png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset, ++ delay_num, delay_den, dispose_op, blend_op); ++ ++ info_ptr->next_frame_width = width; ++ info_ptr->next_frame_height = height; ++ info_ptr->next_frame_x_offset = x_offset; ++ info_ptr->next_frame_y_offset = y_offset; ++ info_ptr->next_frame_delay_num = delay_num; ++ info_ptr->next_frame_delay_den = delay_den; ++ info_ptr->next_frame_dispose_op = dispose_op; ++ info_ptr->next_frame_blend_op = blend_op; ++ ++ info_ptr->valid |= PNG_INFO_fcTL; ++ ++ return (1); ++} ++ ++void /* PRIVATE */ ++png_ensure_fcTL_is_valid(png_structp png_ptr, ++ png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, ++ png_byte dispose_op, png_byte blend_op) ++{ ++ if (width + x_offset > png_ptr->first_frame_width || ++ height + y_offset > png_ptr->first_frame_height) ++ png_error(png_ptr, "dimensions of a frame are greater than" ++ "the ones in IHDR"); ++ if (width > PNG_UINT_31_MAX) ++ png_error(png_ptr, "invalid width in fcTL (> 2^31-1)"); ++ if (height > PNG_UINT_31_MAX) ++ png_error(png_ptr, "invalid height in fcTL (> 2^31-1)"); ++ if (x_offset > PNG_UINT_31_MAX) ++ png_error(png_ptr, "invalid x_offset in fcTL (> 2^31-1)"); ++ if (y_offset > PNG_UINT_31_MAX) ++ png_error(png_ptr, "invalid y_offset in fcTL (> 2^31-1)"); ++ ++ if (dispose_op != PNG_DISPOSE_OP_NONE && ++ dispose_op != PNG_DISPOSE_OP_BACKGROUND && ++ dispose_op != PNG_DISPOSE_OP_PREVIOUS) ++ png_error(png_ptr, "invalid dispose_op in fcTL"); ++ ++ if (blend_op != PNG_BLEND_OP_SOURCE && ++ blend_op != PNG_BLEND_OP_OVER) ++ png_error(png_ptr, "invalid blend_op in fcTL"); ++ ++ if (blend_op == PNG_BLEND_OP_OVER) { ++ if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY) ++ png_error(png_ptr, "PNG_BLEND_OP_OVER is not valid for " ++ "color type 'greyscale without alpha'"); ++ else if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) && ++ !(png_ptr->color_type & PNG_COLOR_MASK_ALPHA)) ++ png_error(png_ptr, "PNG_BLEND_OP_OVER is not valid for " ++ "color type 'truecolor without alpha'"); ++ } ++} ++ ++png_uint_32 PNGAPI ++png_set_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr, ++ png_byte is_hidden) ++{ ++ png_debug(1, "in png_first_frame_is_hidden()\n"); ++ ++ if (png_ptr == NULL) ++ return 0; ++ ++ if(is_hidden) ++ png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN; ++ else ++ png_ptr->apng_flags &= ~PNG_FIRST_FRAME_HIDDEN; ++ ++ return 1; ++} ++#endif /* PNG_APNG_SUPPORTED */ ++ + #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) + void PNGAPI + png_set_unknown_chunks(png_structp png_ptr, +Index: pngrutil.c +=================================================================== +--- pngrutil.c (révision 149) ++++ pngrutil.c (copie de travail) +@@ -414,6 +414,11 @@ + filter_type = buf[11]; + interlace_type = buf[12]; + ++#if defined(PNG_READ_APNG_SUPPORTED) ++ png_ptr->first_frame_width = width; ++ png_ptr->first_frame_height = height; ++#endif ++ + /* set internal variables */ + png_ptr->width = width; + png_ptr->height = height; +@@ -2220,6 +2225,168 @@ + } + #endif + ++#if defined(PNG_READ_APNG_SUPPORTED) ++void /* PRIVATE */ ++png_handle_acTL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) ++{ ++ png_byte data[8]; ++ png_uint_32 num_frames; ++ png_uint_32 num_plays; ++ png_uint_32 didSet; ++ ++ png_debug(1, "in png_handle_acTL\n"); ++ ++ if (!(png_ptr->mode & PNG_HAVE_IHDR)) ++ { ++ png_error(png_ptr, "Missing IHDR before acTL"); ++ } ++ else if (png_ptr->mode & PNG_HAVE_IDAT) ++ { ++ png_warning(png_ptr, "Invalid acTL after IDAT skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ else if (png_ptr->mode & PNG_HAVE_acTL) ++ { ++ png_warning(png_ptr, "Duplicate acTL skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ else if (length != 8) ++ { ++ png_warning(png_ptr, "acTL with invalid length skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ ++ png_crc_read(png_ptr, data, 8); ++ png_crc_finish(png_ptr, 0); ++ ++ num_frames = png_get_uint_31(png_ptr, data); ++ num_plays = png_get_uint_31(png_ptr, data + 4); ++ ++ /* the set function will do error checking on num_frames */ ++ didSet = png_set_acTL(png_ptr, info_ptr, num_frames, num_plays); ++ if(didSet) ++ png_ptr->mode |= PNG_HAVE_acTL; ++} ++ ++void /* PRIVATE */ ++png_handle_fcTL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) ++{ ++ png_byte data[22]; ++ png_uint_32 width; ++ png_uint_32 height; ++ png_uint_32 x_offset; ++ png_uint_32 y_offset; ++ png_uint_16 delay_num; ++ png_uint_16 delay_den; ++ png_byte dispose_op; ++ png_byte blend_op; ++ ++ png_debug(1, "in png_handle_fcTL\n"); ++ ++ if (!(png_ptr->mode & PNG_HAVE_IHDR)) ++ { ++ png_error(png_ptr, "Missing IHDR before fcTL"); ++ } ++ else if (png_ptr->mode & PNG_HAVE_IDAT) ++ { ++ /* for any frames other then the first this message may be misleading, ++ * but correct. PNG_HAVE_IDAT is unset before the frame head is read ++ * i can't think of a better message */ ++ png_warning(png_ptr, "Invalid fcTL after IDAT skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ else if (png_ptr->mode & PNG_HAVE_fcTL) ++ { ++ png_warning(png_ptr, "Duplicate fcTL within one frame skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ else if (length != 26) ++ { ++ png_warning(png_ptr, "fcTL with invalid length skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ ++ png_ensure_sequence_number(png_ptr, length); ++ ++ png_crc_read(png_ptr, data, 22); ++ png_crc_finish(png_ptr, 0); ++ ++ width = png_get_uint_31(png_ptr, data); ++ height = png_get_uint_31(png_ptr, data + 4); ++ x_offset = png_get_uint_31(png_ptr, data + 8); ++ y_offset = png_get_uint_31(png_ptr, data + 12); ++ delay_num = png_get_uint_16(data + 16); ++ delay_den = png_get_uint_16(data + 18); ++ dispose_op = data[20]; ++ blend_op = data[21]; ++ ++ if (png_ptr->num_frames_read == 0 && (x_offset != 0 || y_offset != 0)) ++ png_error(png_ptr, "fcTL for the first frame must have zero offset"); ++ if (png_ptr->num_frames_read == 0 && ++ (width != info_ptr->width || height != info_ptr->height)) ++ png_error(png_ptr, "size in first frame's fcTL must match " ++ "the size in IHDR"); ++ ++ /* the set function will do more error checking */ ++ png_set_next_frame_fcTL(png_ptr, info_ptr, width, height, ++ x_offset, y_offset, delay_num, delay_den, ++ dispose_op, blend_op); ++ ++ png_read_reinit(png_ptr, info_ptr); ++ ++ png_ptr->mode |= PNG_HAVE_fcTL; ++} ++ ++void /* PRIVATE */ ++png_have_info(png_structp png_ptr, png_infop info_ptr) ++{ ++ if((info_ptr->valid & PNG_INFO_acTL) && !(info_ptr->valid & PNG_INFO_fcTL)) ++ { ++ png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN; ++ info_ptr->num_frames++; ++ } ++} ++ ++void /* PRIVATE */ ++png_handle_fdAT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) ++{ ++ png_ensure_sequence_number(png_ptr, length); ++ ++ /* This function is only called from png_read_end(), png_read_info(), ++ * and png_push_read_chunk() which means that: ++ * - the user doesn't want to read this frame ++ * - or this is an out-of-place fdAT ++ * in either case it is safe to ignore the chunk with a warning */ ++ png_warning(png_ptr, "ignoring fdAT chunk"); ++ png_crc_finish(png_ptr, length - 4); ++} ++ ++void /* PRIVATE */ ++png_ensure_sequence_number(png_structp png_ptr, png_uint_32 length) ++{ ++ png_byte data[4]; ++ png_uint_32 sequence_number; ++ ++ if (length < 4) ++ png_error(png_ptr, "invalid fcTL or fdAT chunk found"); ++ ++ png_crc_read(png_ptr, data, 4); ++ sequence_number = png_get_uint_31(png_ptr, data); ++ ++ if (sequence_number != png_ptr->next_seq_num) ++ png_error(png_ptr, "fcTL or fdAT chunk with out-of-order sequence " ++ "number found"); ++ ++ png_ptr->next_seq_num++; ++} ++#endif /* PNG_READ_APNG_SUPPORTED */ ++ + /* This function is called when we haven't found a handler for a + chunk. If there isn't a problem with the chunk itself (ie bad + chunk name, CRC, or a critical chunk), the chunk is silently ignored +@@ -3195,8 +3362,10 @@ + if (row_bytes + 64 > png_ptr->old_big_row_buf_size) + { + png_free(png_ptr, png_ptr->big_row_buf); +- png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes+64); +- png_ptr->row_buf = png_ptr->big_row_buf+32; ++ if (png_ptr->big_row_buf == NULL) ++ png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes+64); ++ if (png_ptr->row_buf == NULL) ++ png_ptr->row_buf = png_ptr->big_row_buf+32; + png_ptr->old_big_row_buf_size = row_bytes+64; + } + +@@ -3226,4 +3395,82 @@ + + png_ptr->flags |= PNG_FLAG_ROW_INIT; + } ++ ++#if defined(PNG_READ_APNG_SUPPORTED) ++/* This function is to be called after the main IDAT set has been read and ++ * before a new IDAT is read. It resets some parts of png_ptr ++ * to make them usable by the read functions again */ ++void /* PRIVATE */ ++png_read_reset(png_structp png_ptr) ++{ ++ png_ptr->mode &= ~PNG_HAVE_IDAT; ++ png_ptr->mode &= ~PNG_AFTER_IDAT; ++ png_ptr->row_number = 0; ++ png_ptr->pass = 0; ++ png_ptr->flags &= ~PNG_FLAG_ROW_INIT; ++} ++ ++void /* PRIVATE */ ++png_read_reinit(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_ptr->width = info_ptr->next_frame_width; ++ png_ptr->height = info_ptr->next_frame_height; ++ png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->width); ++} ++ ++/* same as png_read_reset() but for the progressive reader */ ++void /* PRIVATE */ ++png_progressive_read_reset(png_structp png_ptr) ++{ ++#ifdef PNG_USE_LOCAL_ARRAYS ++ /* start of interlace block */ ++ const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; ++ ++ /* offset to next interlace block */ ++ const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; ++ ++ /* start of interlace block in the y direction */ ++ const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; ++ ++ /* offset to next interlace block in the y direction */ ++ const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; ++#endif ++ png_uint_32 row_bytes; ++ ++ if (png_ptr->interlaced) ++ { ++ if (!(png_ptr->transformations & PNG_INTERLACE)) ++ png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 - ++ png_pass_ystart[0]) / png_pass_yinc[0]; ++ else ++ png_ptr->num_rows = png_ptr->height; ++ ++ png_ptr->iwidth = (png_ptr->width + ++ png_pass_inc[png_ptr->pass] - 1 - ++ png_pass_start[png_ptr->pass]) / ++ png_pass_inc[png_ptr->pass]; ++ ++ row_bytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->iwidth) + 1; ++ ++ png_ptr->irowbytes = (png_size_t)row_bytes; ++ if((png_uint_32)png_ptr->irowbytes != row_bytes) ++ png_error(png_ptr, "png_progressive_read_reset(): Rowbytes " ++ "overflow"); ++ } ++ else ++ { ++ png_ptr->num_rows = png_ptr->height; ++ png_ptr->iwidth = png_ptr->width; ++ png_ptr->irowbytes = png_ptr->rowbytes + 1; ++ } ++ ++ png_ptr->flags &= ~PNG_FLAG_ZLIB_FINISHED; ++ if (inflateReset(&(png_ptr->zstream)) != Z_OK) ++ png_error(png_ptr, "inflateReset failed"); ++ png_ptr->zstream.avail_in = 0; ++ png_ptr->zstream.next_in = 0; ++ png_ptr->zstream.next_out = png_ptr->row_buf; ++ png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes; ++} ++#endif /* PNG_READ_APNG_SUPPORTED */ + #endif /* PNG_READ_SUPPORTED */ +Index: pngwutil.c +=================================================================== +--- pngwutil.c (révision 149) ++++ pngwutil.c (copie de travail) +@@ -506,6 +506,11 @@ + /* write the chunk */ + png_write_chunk(png_ptr, (png_bytep)png_IHDR, buf, (png_size_t)13); + ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ png_ptr->first_frame_width = width; ++ png_ptr->first_frame_height = height; ++#endif ++ + /* initialize zlib with PNG info */ + png_ptr->zstream.zalloc = png_zalloc; + png_ptr->zstream.zfree = png_zfree; +@@ -628,6 +633,9 @@ + { + #ifdef PNG_USE_LOCAL_ARRAYS + PNG_IDAT; ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ PNG_fdAT; ++#endif + #endif + png_debug(1, "in png_write_IDAT\n"); + +@@ -670,7 +678,28 @@ + "Invalid zlib compression method or flags in IDAT"); + } + +- png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length); ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ if(png_ptr->num_frames_written == 0) ++#endif ++ png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length); ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++ else ++ { ++ png_byte buf[4]; ++ ++ png_write_chunk_start(png_ptr, (png_bytep)png_fdAT, 4 + length); ++ ++ png_save_uint_32(buf, png_ptr->next_seq_num); ++ png_write_chunk_data(png_ptr, buf, 4); ++ ++ png_write_chunk_data(png_ptr, data, length); ++ ++ png_write_chunk_end(png_ptr); ++ ++ png_ptr->next_seq_num++; ++ } ++#endif ++ + png_ptr->mode |= PNG_HAVE_IDAT; + } + +@@ -1755,6 +1784,70 @@ + } + #endif + ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++void /* PRIVATE */ ++png_write_acTL(png_structp png_ptr, ++ png_uint_32 num_frames, png_uint_32 num_plays) ++{ ++#ifdef PNG_USE_LOCAL_ARRAYS ++ PNG_acTL; ++#endif ++ png_byte data[16]; ++ ++ png_debug(1, "in png_write_acTL\n"); ++ ++ png_ptr->num_frames_to_write = num_frames; ++ ++ if (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN) ++ num_frames--; ++ ++ png_save_uint_32(data, num_frames); ++ png_save_uint_32(data + 4, num_plays); ++ ++ png_write_chunk(png_ptr, (png_bytep)png_acTL, data, (png_size_t)8); ++} ++ ++void /* PRIVATE */ ++png_write_fcTL(png_structp png_ptr, png_uint_32 width, png_uint_32 height, ++ png_uint_32 x_offset, png_uint_32 y_offset, ++ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, ++ png_byte blend_op) ++{ ++#ifdef PNG_USE_LOCAL_ARRAYS ++ PNG_fcTL; ++#endif ++ png_byte data[26]; ++ ++ png_debug(1, "in png_write_fcTL\n"); ++ ++ if (png_ptr->num_frames_written == 0 && (x_offset != 0 || y_offset != 0)) ++ png_error(png_ptr, "x and/or y offset for the first frame aren't 0\n"); ++ if (png_ptr->num_frames_written == 0 && ++ (width != png_ptr->first_frame_width || ++ height != png_ptr->first_frame_height)) ++ png_error(png_ptr, "width and/or height in the first frame's fcTL " ++ "don't match the ones in IHDR\n"); ++ ++ /* more error checking */ ++ png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset, ++ delay_num, delay_den, dispose_op, blend_op); ++ ++ png_save_uint_32(data, png_ptr->next_seq_num); ++ png_save_uint_32(data + 4, width); ++ png_save_uint_32(data + 8, height); ++ png_save_uint_32(data + 12, x_offset); ++ png_save_uint_32(data + 16, y_offset); ++ png_save_uint_16(data + 20, delay_num); ++ png_save_uint_16(data + 22, delay_den); ++ data[24] = dispose_op; ++ data[25] = blend_op; ++ ++ png_write_chunk(png_ptr, (png_bytep)png_fcTL, data, (png_size_t)26); ++ ++ png_ptr->next_seq_num++; ++} ++#endif /* PNG_WRITE_APNG_SUPPORTED */ ++ + /* initializes the row writing capability of libpng */ + void /* PRIVATE */ + png_write_start_row(png_structp png_ptr) +@@ -2824,4 +2917,39 @@ + } + #endif + } ++ ++#if defined(PNG_WRITE_APNG_SUPPORTED) ++void /* PRIVATE */ ++png_write_reset(png_structp png_ptr) ++{ ++ png_ptr->row_number = 0; ++ png_ptr->pass = 0; ++ png_ptr->mode &= ~PNG_HAVE_IDAT; ++} ++ ++void /* PRIVATE */ ++png_write_reinit(png_structp png_ptr, png_infop info_ptr, ++ png_uint_32 width, png_uint_32 height) ++{ ++ if (png_ptr->num_frames_written == 0 && ++ (width != png_ptr->first_frame_width || ++ height != png_ptr->first_frame_height)) ++ png_error(png_ptr, "width and/or height in the first frame's fcTL " ++ "don't match the ones in IHDR\n"); ++ if (width > png_ptr->first_frame_width || ++ height > png_ptr->first_frame_height) ++ png_error(png_ptr, "width and/or height for a frame greater than" ++ "the ones in IHDR"); ++ ++ png_set_IHDR(png_ptr, info_ptr, width, height, ++ info_ptr->bit_depth, info_ptr->color_type, ++ info_ptr->interlace_type, info_ptr->compression_type, ++ info_ptr->filter_type); ++ ++ png_ptr->width = width; ++ png_ptr->height = height; ++ png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width); ++ png_ptr->usr_width = png_ptr->width; ++} ++#endif + #endif /* PNG_WRITE_SUPPORTED */ +Index: pngrtran.c +=================================================================== +--- pngrtran.c (révision 149) ++++ pngrtran.c (copie de travail) +@@ -1293,7 +1293,7 @@ + * or png_read_update_info() after setting transforms that expand + * pixels. This check added to libpng-1.2.19 */ + #if (PNG_WARN_UNINITIALIZED_ROW==1) +- png_error(png_ptr, "Uninitialized row"); ++ png_warning(png_ptr, "Uninitialized row"); + #else + png_warning(png_ptr, "Uninitialized row"); + #endif |