commit 262e9331b17317cb3780ec32cbd35dca44af77b9 Author: Fredrik Rinnestam <fredrik@crux.nu> Date: Thu Dec 3 19:15:01 2015 +0100 [notify] libpng: updated to 1.6.20. Reissued fix for CVE-2015-8126 diff --git a/libpng/.footprint b/libpng/.footprint index f642b36..150fcd9 100644 --- a/libpng/.footprint +++ b/libpng/.footprint @@ -18,9 +18,9 @@ lrwxrwxrwx root/root usr/lib/libpng.la -> libpng16.la lrwxrwxrwx root/root usr/lib/libpng.so -> libpng16.so -rw-r--r-- root/root usr/lib/libpng16.a -rwxr-xr-x root/root usr/lib/libpng16.la -lrwxrwxrwx root/root usr/lib/libpng16.so -> libpng16.so.16.19.0 -lrwxrwxrwx root/root usr/lib/libpng16.so.16 -> libpng16.so.16.19.0 --rwxr-xr-x root/root usr/lib/libpng16.so.16.19.0 +lrwxrwxrwx root/root usr/lib/libpng16.so -> libpng16.so.16.20.0 +lrwxrwxrwx root/root usr/lib/libpng16.so.16 -> libpng16.so.16.20.0 +-rwxr-xr-x root/root usr/lib/libpng16.so.16.20.0 drwxr-xr-x root/root usr/lib/pkgconfig/ lrwxrwxrwx root/root usr/lib/pkgconfig/libpng.pc -> libpng16.pc -rw-r--r-- root/root usr/lib/pkgconfig/libpng16.pc diff --git a/libpng/.md5sum b/libpng/.md5sum index 83d9f03..7ea5896 100644 --- a/libpng/.md5sum +++ b/libpng/.md5sum @@ -1,2 +1,2 @@ -4991e8e3a79d9aaefc4106b4a3c7e13e libpng-1.6.19-apng.patch -1e6a458429e850fc93c1f3b6dc00a48f libpng-1.6.19.tar.xz +935fa62557ba6f547ccad74d261d11c4 libpng-1.6.20-apng.patch +3968acb7c66ef81a9dab867f35d0eb4b libpng-1.6.20.tar.xz diff --git a/libpng/Pkgfile b/libpng/Pkgfile index d0e7e45..2acfec1 100644 --- a/libpng/Pkgfile +++ b/libpng/Pkgfile @@ -4,14 +4,14 @@ # Depends on: zlib name=libpng -version=1.6.19 +version=1.6.20 release=1 source=(http://download.sourceforge.net/$name/$name-$version.tar.xz \ $name-$version-apng.patch) build() { cd $name-$version - patch -p1 -i $SRC/$name-$version-apng.patch + patch -p0 -i $SRC/$name-$version-apng.patch ./configure --prefix=/usr --mandir=/usr/man make diff --git a/libpng/libpng-1.6.19-apng.patch b/libpng/libpng-1.6.19-apng.patch deleted file mode 100644 index 811d1e3..0000000 --- a/libpng/libpng-1.6.19-apng.patch +++ /dev/null @@ -1,1699 +0,0 @@ -diff -Nru libpng-1.6.19-orig/pngget.c libpng-1.6.19/pngget.c ---- libpng-1.6.19-orig/pngget.c 2015-11-13 21:37:46.357671356 +0100 -+++ libpng-1.6.19/pngget.c 2015-11-13 21:38:46.566768235 +0100 -@@ -1216,4 +1216,166 @@ - # endif - #endif - -+#ifdef 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", "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()"); -+ -+ 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()"); -+ -+ 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", "fcTL"); -+ -+ if (png_ptr != NULL && info_ptr != NULL && -+ (info_ptr->valid & PNG_INFO_fcTL) && -+ width != NULL && height != NULL && -+ x_offset != NULL && y_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()"); -+ -+ 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()"); -+ -+ 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()"); -+ -+ 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()"); -+ -+ 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()"); -+ -+ 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()"); -+ -+ 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()"); -+ -+ 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()"); -+ -+ 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()"); -+ -+ if (png_ptr != NULL) -+ return (png_byte)(png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN); -+ -+ PNG_UNUSED(info_ptr) -+ -+ return 0; -+} -+#endif /* PNG_APNG_SUPPORTED */ - #endif /* READ || WRITE */ -diff -Nru libpng-1.6.19-orig/png.h libpng-1.6.19/png.h ---- libpng-1.6.19-orig/png.h 2015-11-13 21:37:46.323670172 +0100 -+++ libpng-1.6.19/png.h 2015-11-13 21:41:07.687687990 +0100 -@@ -334,6 +334,10 @@ - # include "pnglibconf.h" - #endif - -+#define PNG_APNG_SUPPORTED -+#define PNG_READ_APNG_SUPPORTED -+#define PNG_WRITE_APNG_SUPPORTED -+ - #ifndef PNG_VERSION_INFO_ONLY - /* Machine specific configuration. */ - # include "pngconf.h" -@@ -429,6 +433,17 @@ - * See pngconf.h for base types that vary by machine/system - */ - -+#ifdef PNG_APNG_SUPPORTED -+/* 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 -+#endif /* PNG_APNG_SUPPORTED */ -+ - /* This triggers a compiler error in png.c, if png.c and png.h - * do not agree upon the version number. - */ -@@ -750,6 +765,11 @@ - #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ - #if INT_MAX >= 0x8000 /* else this might break */ - #define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */ -+#ifdef PNG_APNG_SUPPORTED -+#define PNG_INFO_acTL 0x10000 -+#define PNG_INFO_fcTL 0x20000 -+#endif -+ - #endif - - /* This is used for the transformation routines, as some of them -@@ -788,6 +808,10 @@ - #ifdef PNG_PROGRESSIVE_READ_SUPPORTED - typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop)); - typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop)); -+#ifdef PNG_APNG_SUPPORTED -+typedef PNG_CALLBACK(void, *png_progressive_frame_ptr, (png_structp, -+ png_uint_32)); -+#endif - - /* The following callback receives png_uint_32 row_number, int pass for the - * png_bytep data of the row. When transforming an interlaced image the -@@ -3108,6 +3132,74 @@ - /******************************************************************************* - * END OF HARDWARE AND SOFTWARE OPTIONS - ******************************************************************************/ -+#ifdef PNG_APNG_SUPPORTED -+PNG_EXPORT(245, png_uint_32, png_get_acTL, (png_structp png_ptr, -+ png_infop info_ptr, png_uint_32 *num_frames, png_uint_32 *num_plays)); -+ -+PNG_EXPORT(246, png_uint_32, png_set_acTL, (png_structp png_ptr, -+ png_infop info_ptr, png_uint_32 num_frames, png_uint_32 num_plays)); -+ -+PNG_EXPORT(247, png_uint_32, png_get_num_frames, (png_structp png_ptr, -+ png_infop info_ptr)); -+ -+PNG_EXPORT(248, png_uint_32, png_get_num_plays, (png_structp png_ptr, -+ png_infop info_ptr)); -+ -+PNG_EXPORT(249, png_uint_32, 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_EXPORT(250, png_uint_32, 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_EXPORT(251, png_uint_32, png_get_next_frame_width, -+ (png_structp png_ptr, png_infop info_ptr)); -+PNG_EXPORT(252, png_uint_32, png_get_next_frame_height, -+ (png_structp png_ptr, png_infop info_ptr)); -+PNG_EXPORT(253, png_uint_32, png_get_next_frame_x_offset, -+ (png_structp png_ptr, png_infop info_ptr)); -+PNG_EXPORT(254, png_uint_32, png_get_next_frame_y_offset, -+ (png_structp png_ptr, png_infop info_ptr)); -+PNG_EXPORT(255, png_uint_16, png_get_next_frame_delay_num, -+ (png_structp png_ptr, png_infop info_ptr)); -+PNG_EXPORT(256, png_uint_16, png_get_next_frame_delay_den, -+ (png_structp png_ptr, png_infop info_ptr)); -+PNG_EXPORT(257, png_byte, png_get_next_frame_dispose_op, -+ (png_structp png_ptr, png_infop info_ptr)); -+PNG_EXPORT(258, png_byte, png_get_next_frame_blend_op, -+ (png_structp png_ptr, png_infop info_ptr)); -+PNG_EXPORT(259, png_byte, png_get_first_frame_is_hidden, -+ (png_structp png_ptr, png_infop info_ptr)); -+PNG_EXPORT(260, png_uint_32, png_set_first_frame_is_hidden, -+ (png_structp png_ptr, png_infop info_ptr, png_byte is_hidden)); -+ -+#ifdef PNG_READ_APNG_SUPPORTED -+PNG_EXPORT(261, void, png_read_frame_head, (png_structp png_ptr, -+ png_infop info_ptr)); -+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -+PNG_EXPORT(262, void, png_set_progressive_frame_fn, (png_structp png_ptr, -+ png_progressive_frame_ptr frame_info_fn, -+ png_progressive_frame_ptr frame_end_fn)); -+#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ -+#endif /* PNG_READ_APNG_SUPPORTED */ -+ -+#ifdef PNG_WRITE_APNG_SUPPORTED -+PNG_EXPORT(263, void, 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_EXPORT(264, void, png_write_frame_tail, (png_structp png_ptr, -+ png_infop info_ptr)); -+#endif /* PNG_WRITE_APNG_SUPPORTED */ -+#endif /* PNG_APNG_SUPPORTED */ - - /* Maintainer: Put new public prototypes here ^, in libpng.3, in project - * defs, and in scripts/symbols.def. -@@ -3117,7 +3209,11 @@ - * one to use is one more than this.) - */ - #ifdef PNG_EXPORT_LAST_ORDINAL -+#ifdef PNG_APNG_SUPPORTED -+ PNG_EXPORT_LAST_ORDINAL(264); -+#else - PNG_EXPORT_LAST_ORDINAL(244); -+#endif /* PNG_APNG_SUPPORTED */ - #endif - - #ifdef __cplusplus -diff -Nru libpng-1.6.19-orig/pnginfo.h libpng-1.6.19/pnginfo.h ---- libpng-1.6.19-orig/pnginfo.h 2015-11-13 21:37:46.348671042 +0100 -+++ libpng-1.6.19/pnginfo.h 2015-11-13 21:38:46.567768270 +0100 -@@ -255,5 +255,18 @@ - png_bytepp row_pointers; /* the image bits */ - #endif - -+#ifdef 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 -+ - }; - #endif /* PNGINFO_H */ -diff -Nru libpng-1.6.19-orig/pngpread.c libpng-1.6.19/pngpread.c ---- libpng-1.6.19-orig/pngpread.c 2015-11-13 21:37:46.359671425 +0100 -+++ libpng-1.6.19/pngpread.c 2015-11-13 21:38:46.567768270 +0100 -@@ -194,6 +194,106 @@ - - chunk_name = png_ptr->chunk_name; - -+#ifdef PNG_READ_APNG_SUPPORTED -+ if (png_ptr->num_frames_read > 0 && -+ png_ptr->num_frames_read < info_ptr->num_frames) -+ { -+ if (chunk_name == png_IDAT) -+ { -+ /* 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_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -+ return; -+ } -+ else if (chunk_name == png_fdAT) -+ { -+ 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_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 (chunk_name == png_fcTL) -+ { -+ 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_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -+ return; -+ } -+ -+ return; -+ } -+#endif /* PNG_READ_APNG_SUPPORTED */ -+ - if (chunk_name == png_IDAT) - { - if ((png_ptr->mode & PNG_AFTER_IDAT) != 0) -@@ -258,6 +358,9 @@ - - else if (chunk_name == png_IDAT) - { -+#ifdef PNG_READ_APNG_SUPPORTED -+ png_have_info(png_ptr, info_ptr); -+#endif - png_ptr->idat_size = png_ptr->push_length; - png_ptr->process_mode = PNG_READ_IDAT_MODE; - png_push_have_info(png_ptr, info_ptr); -@@ -403,6 +506,30 @@ - png_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length); - } - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ else if (chunk_name == png_acTL) -+ { -+ 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 (chunk_name == png_fcTL) -+ { -+ 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); -+ } -+ -+#endif /* PNG_READ_APNG_SUPPORTED */ - - else - { -@@ -533,7 +660,11 @@ - png_byte chunk_tag[4]; - - /* TODO: this code can be commoned up with the same code in push_read */ -+#ifdef PNG_READ_APNG_SUPPORTED -+ PNG_PUSH_SAVE_BUFFER_IF_LT(12) -+#else - PNG_PUSH_SAVE_BUFFER_IF_LT(8) -+#endif - png_push_fill_buffer(png_ptr, chunk_length, 4); - png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length); - png_reset_crc(png_ptr); -@@ -541,17 +672,64 @@ - png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag); - png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; - -+#ifdef PNG_READ_APNG_SUPPORTED -+ if (png_ptr->chunk_name != png_fdAT && png_ptr->num_frames_read > 0) -+ { -+ if (png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED) -+ { -+ 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_ptr->chunk_name == png_IEND) -+ 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 -+#ifdef PNG_READ_APNG_SUPPORTED -+ if (png_ptr->chunk_name != png_IDAT && png_ptr->num_frames_read == 0) -+#else - if (png_ptr->chunk_name != png_IDAT) -+#endif - { - png_ptr->process_mode = PNG_READ_CHUNK_MODE; - - if ((png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED) == 0) - png_error(png_ptr, "Not enough compressed data"); - -+#ifdef 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; -+ -+#ifdef 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 != 0 && png_ptr->save_buffer_size != 0) -@@ -625,6 +803,15 @@ - if (!(buffer_length > 0) || buffer == NULL) - png_error(png_ptr, "No IDAT data (internal error)"); - -+#ifdef PNG_READ_APNG_SUPPORTED -+ /* If the app is not APNG-aware, decode only the first frame */ -+ if (!(png_ptr->apng_flags & PNG_APNG_APP) && png_ptr->num_frames_read > 0) -+ { -+ png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; -+ return; -+ } -+#endif -+ - /* This routine must process all the data it has been given - * before returning, calling the row callback as required to - * handle the uncompressed results. -@@ -1074,6 +1261,18 @@ - png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer); - } - -+#ifdef 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; -+ png_ptr->apng_flags |= PNG_APNG_APP; -+} -+#endif -+ - png_voidp PNGAPI - png_get_progressive_ptr(png_const_structrp png_ptr) - { -diff -Nru libpng-1.6.19-orig/pngpriv.h libpng-1.6.19/pngpriv.h ---- libpng-1.6.19-orig/pngpriv.h 2015-11-13 21:37:46.359671425 +0100 -+++ libpng-1.6.19/pngpriv.h 2015-11-13 21:38:46.567768270 +0100 -@@ -537,6 +537,10 @@ - #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ - /* 0x4000 (unused) */ - #define PNG_IS_READ_STRUCT 0x8000 /* Else is a write struct */ -+#ifdef PNG_APNG_SUPPORTED -+#define PNG_HAVE_acTL 0x10000 -+#define PNG_HAVE_fcTL 0x20000 -+#endif - - /* Flags for the transformations the PNG library does on the image data */ - #define PNG_BGR 0x0001 -@@ -754,6 +758,16 @@ - #define png_tRNS PNG_U32(116, 82, 78, 83) - #define png_zTXt PNG_U32(122, 84, 88, 116) - -+#ifdef PNG_APNG_SUPPORTED -+#define png_acTL PNG_U32( 97, 99, 84, 76) -+#define png_fcTL PNG_U32(102, 99, 84, 76) -+#define png_fdAT PNG_U32(102, 100, 65, 84) -+ -+/* For png_struct.apng_flags: */ -+#define PNG_FIRST_FRAME_HIDDEN 0x0001 -+#define PNG_APNG_APP 0x0002 -+#endif -+ - /* The following will work on (signed char*) strings, whereas the get_uint_32 - * macro will fail on top-bit-set values because of the sign extension. - */ -@@ -1453,6 +1467,47 @@ - */ - #endif - -+#ifdef PNG_APNG_SUPPORTED -+PNG_INTERNAL_FUNCTION(void,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), PNG_EMPTY); -+ -+#ifdef PNG_READ_APNG_SUPPORTED -+PNG_INTERNAL_FUNCTION(void,png_handle_acTL,(png_structp png_ptr, png_infop info_ptr, -+ png_uint_32 length),PNG_EMPTY); -+PNG_INTERNAL_FUNCTION(void,png_handle_fcTL,(png_structp png_ptr, png_infop info_ptr, -+ png_uint_32 length),PNG_EMPTY); -+PNG_INTERNAL_FUNCTION(void,png_handle_fdAT,(png_structp png_ptr, png_infop info_ptr, -+ png_uint_32 length),PNG_EMPTY); -+PNG_INTERNAL_FUNCTION(void,png_have_info,(png_structp png_ptr, png_infop info_ptr),PNG_EMPTY); -+PNG_INTERNAL_FUNCTION(void,png_ensure_sequence_number,(png_structp png_ptr, -+ png_uint_32 length),PNG_EMPTY); -+PNG_INTERNAL_FUNCTION(void,png_read_reset,(png_structp png_ptr),PNG_EMPTY); -+PNG_INTERNAL_FUNCTION(void,png_read_reinit,(png_structp png_ptr, -+ png_infop info_ptr),PNG_EMPTY); -+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -+PNG_INTERNAL_FUNCTION(void,png_progressive_read_reset,(png_structp png_ptr),PNG_EMPTY); -+#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ -+#endif /* PNG_READ_APNG_SUPPORTED */ -+ -+#ifdef PNG_WRITE_APNG_SUPPORTED -+PNG_INTERNAL_FUNCTION(void,png_write_acTL,(png_structp png_ptr, -+ png_uint_32 num_frames, png_uint_32 num_plays),PNG_EMPTY); -+PNG_INTERNAL_FUNCTION(void,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),PNG_EMPTY); -+PNG_INTERNAL_FUNCTION(void,png_write_fdAT,(png_structp png_ptr, -+ png_const_bytep data, png_size_t length),PNG_EMPTY); -+PNG_INTERNAL_FUNCTION(void,png_write_reset,(png_structp png_ptr),PNG_EMPTY); -+PNG_INTERNAL_FUNCTION(void,png_write_reinit,(png_structp png_ptr, -+ png_infop info_ptr, png_uint_32 width, png_uint_32 height),PNG_EMPTY); -+#endif /* PNG_WRITE_APNG_SUPPORTED */ -+#endif /* PNG_APNG_SUPPORTED */ -+ - /* Added at libpng version 1.4.0 */ - #ifdef PNG_COLORSPACE_SUPPORTED - /* These internal functions are for maintaining the colorspace structure within -diff -Nru libpng-1.6.19-orig/pngread.c libpng-1.6.19/pngread.c ---- libpng-1.6.19-orig/pngread.c 2015-11-13 21:37:46.324670207 +0100 -+++ libpng-1.6.19/pngread.c 2015-11-13 21:38:46.568768304 +0100 -@@ -158,6 +158,9 @@ - - else if (chunk_name == png_IDAT) - { -+#ifdef PNG_READ_APNG_SUPPORTED -+ png_have_info(png_ptr, info_ptr); -+#endif - png_ptr->idat_size = length; - break; - } -@@ -247,6 +250,17 @@ - png_handle_iTXt(png_ptr, info_ptr, length); - #endif - -+#ifdef PNG_READ_APNG_SUPPORTED -+ else if (chunk_name == png_acTL) -+ png_handle_acTL(png_ptr, info_ptr, length); -+ -+ else if (chunk_name == png_fcTL) -+ png_handle_fcTL(png_ptr, info_ptr, length); -+ -+ else if (chunk_name == png_fdAT) -+ png_handle_fdAT(png_ptr, info_ptr, length); -+#endif -+ - else - png_handle_unknown(png_ptr, info_ptr, length, - PNG_HANDLE_CHUNK_AS_DEFAULT); -@@ -254,6 +268,72 @@ - } - #endif /* SEQUENTIAL_READ */ - -+#ifdef 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"); -+ -+ 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_read_reset(png_ptr); -+ png_ptr->flags &= ~PNG_FLAG_ROW_INIT; -+ png_ptr->mode &= ~PNG_HAVE_fcTL; -+ -+ have_chunk_after_DAT = 0; -+ for (;;) -+ { -+ png_uint_32 length = png_read_chunk_header(png_ptr); -+ -+ if (png_ptr->chunk_name == png_IDAT) -+ { -+ /* 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_ptr->chunk_name == png_fcTL) -+ { -+ png_handle_fcTL(png_ptr, info_ptr, length); -+ have_chunk_after_DAT = 1; -+ } -+ -+ else if (png_ptr->chunk_name == png_fdAT) -+ { -+ 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_structrp png_ptr, png_inforp info_ptr) -diff -Nru libpng-1.6.19-orig/pngrutil.c libpng-1.6.19/pngrutil.c ---- libpng-1.6.19-orig/pngrutil.c 2015-11-13 21:37:46.327670311 +0100 -+++ libpng-1.6.19/pngrutil.c 2015-11-13 21:38:46.568768304 +0100 -@@ -824,6 +824,11 @@ - filter_type = buf[11]; - interlace_type = buf[12]; - -+#ifdef 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; -@@ -2724,6 +2729,179 @@ - } - #endif - -+#ifdef 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"); -+ -+ 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"); -+ -+ png_ensure_sequence_number(png_ptr, length); -+ -+ 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-4); -+ 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-4); -+ return; -+ } -+ else if (length != 26) -+ { -+ png_warning(png_ptr, "fcTL with invalid length skipped"); -+ png_crc_finish(png_ptr, length-4); -+ return; -+ } -+ -+ 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_warning(png_ptr, "fcTL for the first frame must have zero offset"); -+ return; -+ } -+ -+ if (info_ptr != NULL) -+ { -+ if (png_ptr->num_frames_read == 0 && -+ (width != info_ptr->width || height != info_ptr->height)) -+ { -+ png_warning(png_ptr, "size in first frame's fcTL must match " -+ "the size in IHDR"); -+ return; -+ } -+ -+ /* 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); -+ PNG_UNUSED(info_ptr) -+} -+ -+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 */ -+ - #ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED - /* Utility function for png_handle_unknown; set up png_ptr::unknown_chunk */ - static int -@@ -3982,7 +4160,38 @@ - { - uInt avail_in; - png_bytep buffer; -+#ifdef PNG_READ_APNG_SUPPORTED -+ png_uint_32 bytes_to_skip = 0; -+ -+ while (png_ptr->idat_size == 0 || bytes_to_skip != 0) -+ { -+ png_crc_finish(png_ptr, bytes_to_skip); -+ bytes_to_skip = 0; -+ -+ png_ptr->idat_size = png_read_chunk_header(png_ptr); -+ if (png_ptr->num_frames_read == 0) -+ { -+ if (png_ptr->chunk_name != png_IDAT) -+ png_error(png_ptr, "Not enough image data"); -+ } -+ else -+ { -+ if (png_ptr->chunk_name == png_IEND) -+ png_error(png_ptr, "Not enough image data"); -+ if (png_ptr->chunk_name != png_fdAT) -+ { -+ 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; -+ } -+ } -+#else - while (png_ptr->idat_size == 0) - { - png_crc_finish(png_ptr, 0); -@@ -3994,7 +4203,7 @@ - if (png_ptr->chunk_name != png_IDAT) - png_error(png_ptr, "Not enough image data"); - } -- -+#endif /* PNG_READ_APNG_SUPPORTED */ - avail_in = png_ptr->IDAT_read_size; - - if (avail_in > png_ptr->idat_size) -@@ -4057,6 +4266,9 @@ - - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; -+#ifdef PNG_READ_APNG_SUPPORTED -+ png_ptr->num_frames_read++; -+#endif - - if (png_ptr->zstream.avail_in > 0 || png_ptr->idat_size > 0) - png_chunk_benign_error(png_ptr, "Extra compressed data"); -@@ -4495,4 +4707,80 @@ - - png_ptr->flags |= PNG_FLAG_ROW_INIT; - } -+ -+#ifdef 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; -+} -+ -+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); -+ png_ptr->info_rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, -+ png_ptr->width); -+ if (png_ptr->prev_row) -+ memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); -+} -+ -+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED -+/* same as png_read_reset() but for the progressive reader */ -+void /* PRIVATE */ -+png_progressive_read_reset(png_structp png_ptr) -+{ -+#ifdef PNG_READ_INTERLACING_SUPPORTED -+ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ -+ -+ /* Start of interlace block */ -+ const int png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; -+ -+ /* Offset to next interlace block */ -+ const int png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; -+ -+ /* Start of interlace block in the y direction */ -+ const int png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; -+ -+ /* Offset to next interlace block in the y direction */ -+ const int png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; -+ -+ 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]; -+ } -+ else -+#endif /* PNG_READ_INTERLACING_SUPPORTED */ -+ { -+ png_ptr->num_rows = png_ptr->height; -+ png_ptr->iwidth = png_ptr->width; -+ } -+ png_ptr->flags &= ~PNG_FLAG_ZSTREAM_ENDED; -+ 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_ROWBYTES(png_ptr->pixel_depth, -+ png_ptr->iwidth) + 1; -+} -+#endif /* PNG_PROGRESSIVE_READ_SUPPORTED */ -+#endif /* PNG_READ_APNG_SUPPORTED */ - #endif /* READ */ -diff -Nru libpng-1.6.19-orig/pngset.c libpng-1.6.19/pngset.c ---- libpng-1.6.19-orig/pngset.c 2015-11-13 21:37:46.329670381 +0100 -+++ libpng-1.6.19/pngset.c 2015-11-13 21:38:46.569768339 +0100 -@@ -241,6 +241,11 @@ - info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); - - info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); -+ -+#ifdef PNG_APNG_SUPPORTED -+ /* for non-animated png. this may be overwritten from an acTL chunk later */ -+ info_ptr->num_frames = 1; -+#endif - } - - #ifdef PNG_oFFs_SUPPORTED -@@ -1094,6 +1099,147 @@ - } - #endif /* sPLT */ - -+#ifdef 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", "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", "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); -+ -+ if (blend_op == PNG_BLEND_OP_OVER) -+ { -+ if (!(png_ptr->color_type & PNG_COLOR_MASK_ALPHA) && -+ !(png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))) -+ { -+ png_warning(png_ptr, "PNG_BLEND_OP_OVER is meaningless " -+ "and wasteful for opaque images, ignored"); -+ blend_op = PNG_BLEND_OP_SOURCE; -+ } -+ } -+ -+ 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 > 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 (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 (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"); -+ -+ PNG_UNUSED(delay_num) -+ PNG_UNUSED(delay_den) -+} -+ -+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()"); -+ -+ 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; -+ -+ PNG_UNUSED(info_ptr) -+ -+ return 1; -+} -+#endif /* PNG_APNG_SUPPORTED */ -+ - #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED - static png_byte - check_location(png_const_structrp png_ptr, int location) -diff -Nru libpng-1.6.19-orig/pngstruct.h libpng-1.6.19/pngstruct.h ---- libpng-1.6.19-orig/pngstruct.h 2015-11-13 21:37:46.356671321 +0100 -+++ libpng-1.6.19/pngstruct.h 2015-11-13 21:38:46.569768339 +0100 -@@ -400,6 +400,27 @@ - png_byte filter_type; - #endif - -+#ifdef 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; -+ -+#ifdef 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 -+ -+#ifdef PNG_WRITE_APNG_SUPPORTED -+ png_uint_32 num_frames_to_write; -+ png_uint_32 num_frames_written; -+#endif -+#endif /* PNG_APNG_SUPPORTED */ -+ - /* New members added in libpng-1.2.0 */ - - /* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */ -diff -Nru libpng-1.6.19-orig/pngtest.c libpng-1.6.19/pngtest.c ---- libpng-1.6.19-orig/pngtest.c 2015-11-13 21:37:46.319670033 +0100 -+++ libpng-1.6.19/pngtest.c 2015-11-13 21:48:03.778227241 +0100 -@@ -850,6 +850,10 @@ - png_uint_32 width, height; - int num_pass = 1, pass; - int bit_depth, color_type; -+#ifdef PNG_APNG_SUPPORTED -+ png_uint_32 num_frames; -+ png_uint_32 num_plays; -+#endif - - row_buf = NULL; - error_parameters.file_name = inname; -@@ -1406,6 +1410,89 @@ - t_misc += (t_stop - t_start); - t_start = t_stop; - #endif -+#ifdef PNG_APNG_SUPPORTED -+ if (png_get_valid(read_ptr, read_info_ptr, PNG_INFO_acTL)) -+ { -+ png_uint_32 frame; -+ for (frame = 0; frame < num_frames; frame++) -+ { -+ png_uint_32 frame_width; -+ png_uint_32 frame_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_read_frame_head(read_ptr, read_info_ptr); -+ if (png_get_valid(read_ptr, read_info_ptr, PNG_INFO_fcTL)) -+ { -+ png_get_next_frame_fcTL(read_ptr, read_info_ptr, -+ &frame_width, &frame_height, -+ &x_offset, &y_offset, -+ &delay_num, &delay_den, -+ &dispose_op, &blend_op); -+ } -+ else -+ { -+ frame_width = width; -+ frame_height = height; -+ x_offset = 0; -+ y_offset = 0; -+ delay_num = 1; -+ delay_den = 1; -+ dispose_op = PNG_DISPOSE_OP_NONE; -+ blend_op = PNG_BLEND_OP_SOURCE; -+ } -+#ifdef PNG_WRITE_APNG_SUPPORTED -+ png_write_frame_head(write_ptr, write_info_ptr, (png_bytepp)&row_buf, -+ frame_width, frame_height, -+ x_offset, y_offset, -+ delay_num, delay_den, -+ dispose_op, blend_op); -+#endif -+ for (pass = 0; pass < num_pass; pass++) -+ { -+ pngtest_debug1("Writing row data for pass %d", pass); -+ for (y = 0; y < frame_height; y++) -+ { -+#ifndef SINGLE_ROWBUF_ALLOC -+ pngtest_debug2("Allocating row buffer (pass %d, y = %ld)...", pass, y); -+ row_buf = (png_bytep)png_malloc(read_ptr, -+ png_get_rowbytes(read_ptr, read_info_ptr)); -+ pngtest_debug2("0x%08lx (%ld bytes)", (unsigned long)row_buf, -+ png_get_rowbytes(read_ptr, read_info_ptr)); -+#endif /* !SINGLE_ROWBUF_ALLOC */ -+ png_read_rows(read_ptr, (png_bytepp)&row_buf, NULL, 1); -+ -+#ifdef PNG_WRITE_SUPPORTED -+#ifdef PNGTEST_TIMING -+ t_stop = (float)clock(); -+ t_decode += (t_stop - t_start); -+ t_start = t_stop; -+#endif -+ png_write_rows(write_ptr, (png_bytepp)&row_buf, 1); -+#ifdef PNGTEST_TIMING -+ t_stop = (float)clock(); -+ t_encode += (t_stop - t_start); -+ t_start = t_stop; -+#endif -+#endif /* PNG_WRITE_SUPPORTED */ -+ -+#ifndef SINGLE_ROWBUF_ALLOC -+ pngtest_debug2("Freeing row buffer (pass %d, y = %ld)", pass, y); -+ png_free(read_ptr, row_buf); -+ row_buf = NULL; -+#endif /* !SINGLE_ROWBUF_ALLOC */ -+ } -+ } -+#ifdef PNG_WRITE_APNG_SUPPORTED -+ png_write_frame_tail(write_ptr, write_info_ptr); -+#endif -+ } -+ } -+ else -+#endif - for (pass = 0; pass < num_pass; pass++) - { - pngtest_debug1("Writing row data for pass %d", pass); -@@ -1506,6 +1593,20 @@ - } - } - #endif -+#ifdef PNG_APNG_SUPPORTED -+ if (png_get_valid(read_ptr, read_info_ptr, PNG_INFO_acTL)) -+ { -+ if (png_get_acTL(read_ptr, read_info_ptr, &num_frames, &num_plays)) -+ { -+ png_byte is_hidden; -+ pngtest_debug2("Handling acTL chunks (frames %ld, plays %ld)", -+ num_frames, num_plays); -+ png_set_acTL(write_ptr, write_info_ptr, num_frames, num_plays); -+ is_hidden = png_get_first_frame_is_hidden(read_ptr, read_info_ptr); -+ png_set_first_frame_is_hidden(write_ptr, write_info_ptr, is_hidden); -+ } -+ } -+#endif - #ifdef PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED - { - png_unknown_chunkp unknowns; -diff -Nru libpng-1.6.19-orig/pngwrite.c libpng-1.6.19/pngwrite.c ---- libpng-1.6.19-orig/pngwrite.c 2015-11-13 21:37:46.348671042 +0100 -+++ libpng-1.6.19/pngwrite.c 2015-11-13 21:38:46.570768374 +0100 -@@ -128,6 +128,10 @@ - * the application continues writing the PNG. So check the 'invalid' - * flag here too. - */ -+#ifdef 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 - #ifdef PNG_GAMMA_SUPPORTED - # ifdef PNG_WRITE_gAMA_SUPPORTED - if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 && -@@ -365,6 +369,11 @@ - png_benign_error(png_ptr, "Wrote palette index exceeding num_palette"); - #endif - -+#ifdef 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) - { -@@ -1450,6 +1459,43 @@ - } - #endif - -+#ifdef 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"); -+ -+ /* 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); -+ -+ PNG_UNUSED(row_pointers) -+} -+ -+void PNGAPI -+png_write_frame_tail(png_structp png_ptr, png_infop info_ptr) -+{ -+ png_debug(1, "in png_write_frame_tail"); -+ -+ png_ptr->num_frames_written++; -+ -+ PNG_UNUSED(info_ptr) -+} -+#endif /* PNG_WRITE_APNG_SUPPORTED */ - - #ifdef PNG_SIMPLIFIED_WRITE_SUPPORTED - # ifdef PNG_STDIO_SUPPORTED /* currently required for png_image_write_* */ -diff -Nru libpng-1.6.19-orig/pngwutil.c libpng-1.6.19/pngwutil.c ---- libpng-1.6.19-orig/pngwutil.c 2015-11-13 21:37:46.349671077 +0100 -+++ libpng-1.6.19/pngwutil.c 2015-11-13 21:38:46.570768374 +0100 -@@ -901,6 +901,11 @@ - /* Write the chunk */ - png_write_complete_chunk(png_ptr, png_IHDR, buf, (png_size_t)13); - -+#ifdef PNG_WRITE_APNG_SUPPORTED -+ png_ptr->first_frame_width = width; -+ png_ptr->first_frame_height = height; -+#endif -+ - if ((png_ptr->do_filter) == PNG_NO_FILTERS) - { - if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE || -@@ -1082,7 +1087,14 @@ - optimize_cmf(data, png_image_size(png_ptr)); - #endif - -+# ifdef PNG_WRITE_APNG_SUPPORTED -+ if (png_ptr->num_frames_written == 0) -+# endif - png_write_complete_chunk(png_ptr, png_IDAT, data, size); -+# ifdef PNG_WRITE_APNG_SUPPORTED -+ else -+ png_write_fdAT(png_ptr, data, size); -+# endif /* PNG_WRITE_APNG_SUPPORTED */ - png_ptr->mode |= PNG_HAVE_IDAT; - - png_ptr->zstream.next_out = data; -@@ -1128,7 +1140,15 @@ - optimize_cmf(data, png_image_size(png_ptr)); - #endif - -+# ifdef PNG_WRITE_APNG_SUPPORTED -+ if (png_ptr->num_frames_written == 0) -+# endif - png_write_complete_chunk(png_ptr, png_IDAT, data, size); -+# ifdef PNG_WRITE_APNG_SUPPORTED -+ else -+ png_write_fdAT(png_ptr, data, size); -+# endif /* PNG_WRITE_APNG_SUPPORTED */ -+ - png_ptr->zstream.avail_out = 0; - png_ptr->zstream.next_out = NULL; - png_ptr->mode |= PNG_HAVE_IDAT | PNG_AFTER_IDAT; -@@ -1941,6 +1961,82 @@ - } - #endif - -+#ifdef PNG_WRITE_APNG_SUPPORTED -+void /* PRIVATE */ -+png_write_acTL(png_structp png_ptr, -+ png_uint_32 num_frames, png_uint_32 num_plays) -+{ -+ png_byte buf[8]; -+ -+ png_debug(1, "in png_write_acTL"); -+ -+ png_ptr->num_frames_to_write = num_frames; -+ -+ if (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN) -+ num_frames--; -+ -+ png_save_uint_32(buf, num_frames); -+ png_save_uint_32(buf + 4, num_plays); -+ -+ png_write_complete_chunk(png_ptr, png_acTL, buf, (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) -+{ -+ png_byte buf[26]; -+ -+ png_debug(1, "in png_write_fcTL"); -+ -+ 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"); -+ 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"); -+ -+ /* 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(buf, png_ptr->next_seq_num); -+ png_save_uint_32(buf + 4, width); -+ png_save_uint_32(buf + 8, height); -+ png_save_uint_32(buf + 12, x_offset); -+ png_save_uint_32(buf + 16, y_offset); -+ png_save_uint_16(buf + 20, delay_num); -+ png_save_uint_16(buf + 22, delay_den); -+ buf[24] = dispose_op; -+ buf[25] = blend_op; -+ -+ png_write_complete_chunk(png_ptr, png_fcTL, buf, (png_size_t)26); -+ -+ png_ptr->next_seq_num++; -+} -+ -+void /* PRIVATE */ -+png_write_fdAT(png_structp png_ptr, -+ png_const_bytep data, png_size_t length) -+{ -+ png_byte buf[4]; -+ -+ png_write_chunk_header(png_ptr, png_fdAT, (png_uint_32)(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_WRITE_APNG_SUPPORTED */ -+ - /* Initializes the row writing capability of libpng */ - void /* PRIVATE */ - png_write_start_row(png_structrp png_ptr) -@@ -2706,4 +2802,39 @@ - } - #endif /* WRITE_FLUSH */ - } -+ -+#ifdef 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"); -+ 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 /* PNG_WRITE_APNG_SUPPORTED */ - #endif /* WRITE */ -diff -Nru libpng-1.6.19-orig/scripts/symbols.def libpng-1.6.19/scripts/symbols.def ---- libpng-1.6.19-orig/scripts/symbols.def 2015-11-13 21:37:46.354671251 +0100 -+++ libpng-1.6.19/scripts/symbols.def 2015-11-13 21:38:46.570768374 +0100 -@@ -249,3 +249,23 @@ - png_set_check_for_invalid_index @242 - png_get_palette_max @243 - png_set_option @244 -+ png_get_acTL @245 -+ png_set_acTL @246 -+ png_get_num_frames @247 -+ png_get_num_plays @248 -+ png_get_next_frame_fcTL @249 -+ png_set_next_frame_fcTL @250 -+ png_get_next_frame_width @251 -+ png_get_next_frame_height @252 -+ png_get_next_frame_x_offset @253 -+ png_get_next_frame_y_offset @254 -+ png_get_next_frame_delay_num @255 -+ png_get_next_frame_delay_den @256 -+ png_get_next_frame_dispose_op @257 -+ png_get_next_frame_blend_op @258 -+ png_get_first_frame_is_hidden @259 -+ png_set_first_frame_is_hidden @260 -+ png_read_frame_head @261 -+ png_set_progressive_frame_fn @262 -+ png_write_frame_head @263 -+ png_write_frame_tail @264 diff --git a/libpng/libpng-1.6.20-apng.patch b/libpng/libpng-1.6.20-apng.patch new file mode 100644 index 0000000..c9fd552 --- /dev/null +++ b/libpng/libpng-1.6.20-apng.patch @@ -0,0 +1,1628 @@ +Index: LICENSE +=================================================================== +--- LICENSE ++++ LICENSE +@@ -8,6 +8,12 @@ + If you modify libpng you may insert additional notices immediately following + this sentence. + ++This modified version of libpng code adds animated PNG support and is ++released under the libpng license described below. The modifications are ++Copyright (c) 2006-2007 Andrew Smith, Copyright (c) 2008-2015 Max Stepin, ++and are delimited by "#ifdef PNG_APNG_SUPPORTED / #endif" directives ++surrounding them in the modified libpng source files. ++ + This code is released under the libpng license. + + libpng versions 1.0.7, July 1, 2000, through 1.6.20, December 3, 2015, are +Index: pngread.c +=================================================================== +--- pngread.c ++++ pngread.c +@@ -158,6 +158,9 @@ + + else if (chunk_name == png_IDAT) + { ++#ifdef PNG_READ_APNG_SUPPORTED ++ png_have_info(png_ptr, info_ptr); ++#endif + png_ptr->idat_size = length; + break; + } +@@ -247,6 +250,17 @@ + png_handle_iTXt(png_ptr, info_ptr, length); + #endif + ++#ifdef PNG_READ_APNG_SUPPORTED ++ else if (chunk_name == png_acTL) ++ png_handle_acTL(png_ptr, info_ptr, length); ++ ++ else if (chunk_name == png_fcTL) ++ png_handle_fcTL(png_ptr, info_ptr, length); ++ ++ else if (chunk_name == png_fdAT) ++ png_handle_fdAT(png_ptr, info_ptr, length); ++#endif ++ + else + png_handle_unknown(png_ptr, info_ptr, length, + PNG_HANDLE_CHUNK_AS_DEFAULT); +@@ -254,6 +268,72 @@ + } + #endif /* SEQUENTIAL_READ */ + ++#ifdef 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"); ++ ++ if ((png_ptr->mode & PNG_HAVE_acTL) == 0) ++ 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_read_reset(png_ptr); ++ png_ptr->flags &= ~PNG_FLAG_ROW_INIT; ++ png_ptr->mode &= ~PNG_HAVE_fcTL; ++ ++ have_chunk_after_DAT = 0; ++ for (;;) ++ { ++ png_uint_32 length = png_read_chunk_header(png_ptr); ++ ++ if (png_ptr->chunk_name == png_IDAT) ++ { ++ /* discard trailing IDATs for the first frame */ ++ if (have_chunk_after_DAT != 0 || 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_ptr->chunk_name == png_fcTL) ++ { ++ png_handle_fcTL(png_ptr, info_ptr, length); ++ have_chunk_after_DAT = 1; ++ } ++ ++ else if (png_ptr->chunk_name == png_fdAT) ++ { ++ png_ensure_sequence_number(png_ptr, length); ++ ++ /* discard trailing fdATs for frames other than the first */ ++ if (have_chunk_after_DAT == 0 && 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 /* READ_APNG */ ++ + /* Optional call to update the users info_ptr structure */ + void PNGAPI + png_read_update_info(png_structrp png_ptr, png_inforp info_ptr) +Index: pngget.c +=================================================================== +--- pngget.c ++++ pngget.c +@@ -1216,4 +1216,166 @@ + # endif + #endif + ++#ifdef 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", "acTL"); ++ ++ if (png_ptr != NULL && info_ptr != NULL && ++ (info_ptr->valid & PNG_INFO_acTL) != 0 && ++ 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()"); ++ ++ 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()"); ++ ++ 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", "fcTL"); ++ ++ if (png_ptr != NULL && info_ptr != NULL && ++ (info_ptr->valid & PNG_INFO_fcTL) != 0 && ++ width != NULL && height != NULL && ++ x_offset != NULL && y_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()"); ++ ++ 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()"); ++ ++ 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()"); ++ ++ 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()"); ++ ++ 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()"); ++ ++ 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()"); ++ ++ 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()"); ++ ++ 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()"); ++ ++ 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()"); ++ ++ if (png_ptr != NULL) ++ return (png_byte)(png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN); ++ ++ PNG_UNUSED(info_ptr) ++ ++ return 0; ++} ++#endif /* APNG */ + #endif /* READ || WRITE */ +Index: png.c +=================================================================== +--- png.c ++++ png.c +@@ -775,16 +775,20 @@ + #else + # ifdef __STDC__ + return PNG_STRING_NEWLINE \ +- "libpng version 1.6.20 - December 3, 2015" PNG_STRING_NEWLINE \ ++ "libpng version 1.6.20+apng - December 3, 2015" PNG_STRING_NEWLINE \ + "Copyright (c) 1998-2015 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \ + "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \ + "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \ +- PNG_STRING_NEWLINE; ++ PNG_STRING_NEWLINE \ ++ "Portions Copyright (c) 2006-2007 Andrew Smith" PNG_STRING_NEWLINE \ ++ "Portions Copyright (c) 2008-2015 Max Stepin" PNG_STRING_NEWLINE ; + # else +- return "libpng version 1.6.20 - December 3, 2015\ ++ return "libpng version 1.6.20+apng - December 3, 2015\ + Copyright (c) 1998-2015 Glenn Randers-Pehrson\ + Copyright (c) 1996-1997 Andreas Dilger\ +- Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc."; ++ Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\ ++ Portions Copyright (c) 2006-2007 Andrew Smith\ ++ Portions Copyright (c) 2008-2015 Max Stepin"; + # endif + #endif + } +Index: png.h +=================================================================== +--- png.h ++++ png.h +@@ -23,6 +23,12 @@ + * If you modify libpng you may insert additional notices immediately following + * this sentence. + * ++ * This modified version of libpng code adds animated PNG support and is ++ * released under the libpng license described below. The modifications are ++ * Copyright (c) 2006-2007 Andrew Smith, Copyright (c) 2008-2015 Max Stepin, ++ * and are delimited by "#ifdef PNG_APNG_SUPPORTED / #endif" directives ++ * surrounding them in the modified libpng source files. ++ * + * This code is released under the libpng license. + * + * libpng versions 1.0.7, July 1, 2000, through 1.6.20, December 3, 2015, are +@@ -282,9 +288,9 @@ + */ + + /* Version information for png.h - this should match the version in png.c */ +-#define PNG_LIBPNG_VER_STRING "1.6.20" ++#define PNG_LIBPNG_VER_STRING "1.6.20+apng" + #define PNG_HEADER_VERSION_STRING \ +- " libpng version 1.6.20 - December 3, 2015\n" ++ " libpng version 1.6.20+apng - December 3, 2015\n" + + #define PNG_LIBPNG_VER_SONUM 16 + #define PNG_LIBPNG_VER_DLLNUM 16 +@@ -335,6 +341,10 @@ + # include "pnglibconf.h" + #endif + ++#define PNG_APNG_SUPPORTED ++#define PNG_READ_APNG_SUPPORTED ++#define PNG_WRITE_APNG_SUPPORTED ++ + #ifndef PNG_VERSION_INFO_ONLY + /* Machine specific configuration. */ + # include "pngconf.h" +@@ -430,6 +440,17 @@ + * See pngconf.h for base types that vary by machine/system + */ + ++#ifdef PNG_APNG_SUPPORTED ++/* 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 ++#endif /* APNG */ ++ + /* This triggers a compiler error in png.c, if png.c and png.h + * do not agree upon the version number. + */ +@@ -752,6 +773,10 @@ + #if INT_MAX >= 0x8000 /* else this might break */ + #define PNG_INFO_IDAT 0x8000 /* ESR, 1.0.6 */ + #endif ++#ifdef PNG_APNG_SUPPORTED ++#define PNG_INFO_acTL 0x10000 ++#define PNG_INFO_fcTL 0x20000 ++#endif + + /* This is used for the transformation routines, as some of them + * change these values for the row. It also should enable using +@@ -789,6 +814,10 @@ + #ifdef PNG_PROGRESSIVE_READ_SUPPORTED + typedef PNG_CALLBACK(void, *png_progressive_info_ptr, (png_structp, png_infop)); + typedef PNG_CALLBACK(void, *png_progressive_end_ptr, (png_structp, png_infop)); ++#ifdef PNG_APNG_SUPPORTED ++typedef PNG_CALLBACK(void, *png_progressive_frame_ptr, (png_structp, ++ png_uint_32)); ++#endif + + /* The following callback receives png_uint_32 row_number, int pass for the + * png_bytep data of the row. When transforming an interlaced image the +@@ -3110,6 +3139,75 @@ + * END OF HARDWARE AND SOFTWARE OPTIONS + ******************************************************************************/ + ++#ifdef PNG_APNG_SUPPORTED ++PNG_EXPORT(245, png_uint_32, png_get_acTL, (png_structp png_ptr, ++ png_infop info_ptr, png_uint_32 *num_frames, png_uint_32 *num_plays)); ++ ++PNG_EXPORT(246, png_uint_32, png_set_acTL, (png_structp png_ptr, ++ png_infop info_ptr, png_uint_32 num_frames, png_uint_32 num_plays)); ++ ++PNG_EXPORT(247, png_uint_32, png_get_num_frames, (png_structp png_ptr, ++ png_infop info_ptr)); ++ ++PNG_EXPORT(248, png_uint_32, png_get_num_plays, (png_structp png_ptr, ++ png_infop info_ptr)); ++ ++PNG_EXPORT(249, png_uint_32, 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_EXPORT(250, png_uint_32, 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_EXPORT(251, png_uint_32, png_get_next_frame_width, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(252, png_uint_32, png_get_next_frame_height, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(253, png_uint_32, png_get_next_frame_x_offset, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(254, png_uint_32, png_get_next_frame_y_offset, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(255, png_uint_16, png_get_next_frame_delay_num, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(256, png_uint_16, png_get_next_frame_delay_den, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(257, png_byte, png_get_next_frame_dispose_op, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(258, png_byte, png_get_next_frame_blend_op, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(259, png_byte, png_get_first_frame_is_hidden, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(260, png_uint_32, png_set_first_frame_is_hidden, ++ (png_structp png_ptr, png_infop info_ptr, png_byte is_hidden)); ++ ++#ifdef PNG_READ_APNG_SUPPORTED ++PNG_EXPORT(261, void, png_read_frame_head, (png_structp png_ptr, ++ png_infop info_ptr)); ++#ifdef PNG_PROGRESSIVE_READ_SUPPORTED ++PNG_EXPORT(262, void, png_set_progressive_frame_fn, (png_structp png_ptr, ++ png_progressive_frame_ptr frame_info_fn, ++ png_progressive_frame_ptr frame_end_fn)); ++#endif /* PROGRESSIVE_READ */ ++#endif /* READ_APNG */ ++ ++#ifdef PNG_WRITE_APNG_SUPPORTED ++PNG_EXPORT(263, void, 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_EXPORT(264, void, png_write_frame_tail, (png_structp png_ptr, ++ png_infop info_ptr)); ++#endif /* WRITE_APNG */ ++#endif /* APNG */ ++ + /* Maintainer: Put new public prototypes here ^, in libpng.3, in project + * defs, and in scripts/symbols.def. + */ +@@ -3118,7 +3216,11 @@ + * one to use is one more than this.) + */ + #ifdef PNG_EXPORT_LAST_ORDINAL ++#ifdef PNG_APNG_SUPPORTED ++ PNG_EXPORT_LAST_ORDINAL(264); ++#else + PNG_EXPORT_LAST_ORDINAL(244); ++#endif /* APNG */ + #endif + + #ifdef __cplusplus +Index: pngpriv.h +=================================================================== +--- pngpriv.h ++++ pngpriv.h +@@ -537,6 +537,10 @@ + #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ + /* 0x4000 (unused) */ + #define PNG_IS_READ_STRUCT 0x8000 /* Else is a write struct */ ++#ifdef PNG_APNG_SUPPORTED ++#define PNG_HAVE_acTL 0x10000 ++#define PNG_HAVE_fcTL 0x20000 ++#endif + + /* Flags for the transformations the PNG library does on the image data */ + #define PNG_BGR 0x0001 +@@ -754,6 +758,16 @@ + #define png_tRNS PNG_U32(116, 82, 78, 83) + #define png_zTXt PNG_U32(122, 84, 88, 116) + ++#ifdef PNG_APNG_SUPPORTED ++#define png_acTL PNG_U32( 97, 99, 84, 76) ++#define png_fcTL PNG_U32(102, 99, 84, 76) ++#define png_fdAT PNG_U32(102, 100, 65, 84) ++ ++/* For png_struct.apng_flags: */ ++#define PNG_FIRST_FRAME_HIDDEN 0x0001 ++#define PNG_APNG_APP 0x0002 ++#endif ++ + /* The following will work on (signed char*) strings, whereas the get_uint_32 + * macro will fail on top-bit-set values because of the sign extension. + */ +@@ -1441,6 +1455,49 @@ + + #endif /* PROGRESSIVE_READ */ + ++#ifdef PNG_APNG_SUPPORTED ++PNG_INTERNAL_FUNCTION(void,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),PNG_EMPTY); ++ ++#ifdef PNG_READ_APNG_SUPPORTED ++PNG_INTERNAL_FUNCTION(void,png_handle_acTL,(png_structp png_ptr, ++ png_infop info_ptr, png_uint_32 length),PNG_EMPTY); ++PNG_INTERNAL_FUNCTION(void,png_handle_fcTL,(png_structp png_ptr, ++ png_infop info_ptr, png_uint_32 length),PNG_EMPTY); ++PNG_INTERNAL_FUNCTION(void,png_handle_fdAT,(png_structp png_ptr, ++ png_infop info_ptr, png_uint_32 length),PNG_EMPTY); ++PNG_INTERNAL_FUNCTION(void,png_have_info,(png_structp png_ptr, ++ png_infop info_ptr),PNG_EMPTY); ++PNG_INTERNAL_FUNCTION(void,png_ensure_sequence_number,(png_structp png_ptr, ++ png_uint_32 length),PNG_EMPTY); ++PNG_INTERNAL_FUNCTION(void,png_read_reset,(png_structp png_ptr),PNG_EMPTY); ++PNG_INTERNAL_FUNCTION(void,png_read_reinit,(png_structp png_ptr, ++ png_infop info_ptr),PNG_EMPTY); ++#ifdef PNG_PROGRESSIVE_READ_SUPPORTED ++PNG_INTERNAL_FUNCTION(void,png_progressive_read_reset,(png_structp png_ptr), ++ PNG_EMPTY); ++#endif /* PROGRESSIVE_READ */ ++#endif /* READ_APNG */ ++ ++#ifdef PNG_WRITE_APNG_SUPPORTED ++PNG_INTERNAL_FUNCTION(void,png_write_acTL,(png_structp png_ptr, ++ png_uint_32 num_frames, png_uint_32 num_plays),PNG_EMPTY); ++PNG_INTERNAL_FUNCTION(void,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),PNG_EMPTY); ++PNG_INTERNAL_FUNCTION(void,png_write_fdAT,(png_structp png_ptr, ++ png_const_bytep data, png_size_t length),PNG_EMPTY); ++PNG_INTERNAL_FUNCTION(void,png_write_reset,(png_structp png_ptr),PNG_EMPTY); ++PNG_INTERNAL_FUNCTION(void,png_write_reinit,(png_structp png_ptr, ++ png_infop info_ptr, png_uint_32 width, png_uint_32 height),PNG_EMPTY); ++#endif /* WRITE_APNG */ ++#endif /* APNG */ ++ + /* Added at libpng version 1.6.0 */ + #ifdef PNG_GAMMA_SUPPORTED + PNG_INTERNAL_FUNCTION(void,png_colorspace_set_gamma,(png_const_structrp png_ptr, +Index: pnginfo.h +=================================================================== +--- pnginfo.h ++++ pnginfo.h +@@ -255,5 +255,18 @@ + png_bytepp row_pointers; /* the image bits */ + #endif + ++#ifdef 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 ++ + }; + #endif /* PNGINFO_H */ +Index: pngstruct.h +=================================================================== +--- pngstruct.h ++++ pngstruct.h +@@ -403,6 +403,27 @@ + png_byte filter_type; + #endif + ++#ifdef 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; ++ ++#ifdef 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 ++ ++#ifdef PNG_WRITE_APNG_SUPPORTED ++ png_uint_32 num_frames_to_write; ++ png_uint_32 num_frames_written; ++#endif ++#endif /* APNG */ ++ + /* New members added in libpng-1.2.0 */ + + /* New members added in libpng-1.0.2 but first enabled by default in 1.2.0 */ +Index: pngwrite.c +=================================================================== +--- pngwrite.c ++++ pngwrite.c +@@ -128,6 +128,10 @@ + * the application continues writing the PNG. So check the 'invalid' + * flag here too. + */ ++#ifdef PNG_WRITE_APNG_SUPPORTED ++ if ((info_ptr->valid & PNG_INFO_acTL) != 0) ++ png_write_acTL(png_ptr, info_ptr->num_frames, info_ptr->num_plays); ++#endif + #ifdef PNG_GAMMA_SUPPORTED + # ifdef PNG_WRITE_gAMA_SUPPORTED + if ((info_ptr->colorspace.flags & PNG_COLORSPACE_INVALID) == 0 && +@@ -360,6 +364,11 @@ + if ((png_ptr->mode & PNG_HAVE_IDAT) == 0) + png_error(png_ptr, "No IDATs written into file"); + ++#ifdef 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 ++ + #ifdef PNG_WRITE_CHECK_FOR_INVALID_INDEX_SUPPORTED + if (png_ptr->num_palette_max > png_ptr->num_palette) + png_benign_error(png_ptr, "Wrote palette index exceeding num_palette"); +@@ -2227,4 +2236,42 @@ + } + # endif /* STDIO */ + #endif /* SIMPLIFIED_WRITE */ ++ ++#ifdef 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"); ++ ++ /* 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) == 0) ++ 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->apng_flags & PNG_FIRST_FRAME_HIDDEN) == 0 || ++ png_ptr->num_frames_written != 0) ++ png_write_fcTL(png_ptr, width, height, x_offset, y_offset, ++ delay_num, delay_den, dispose_op, blend_op); ++ ++ PNG_UNUSED(row_pointers) ++} ++ ++void PNGAPI ++png_write_frame_tail(png_structp png_ptr, png_infop info_ptr) ++{ ++ png_debug(1, "in png_write_frame_tail"); ++ ++ png_ptr->num_frames_written++; ++ ++ PNG_UNUSED(info_ptr) ++} ++#endif /* WRITE_APNG */ + #endif /* WRITE */ +Index: pngpread.c +=================================================================== +--- pngpread.c ++++ pngpread.c +@@ -194,6 +194,89 @@ + + chunk_name = png_ptr->chunk_name; + ++#ifdef PNG_READ_APNG_SUPPORTED ++ if (png_ptr->num_frames_read > 0 && ++ png_ptr->num_frames_read < info_ptr->num_frames) ++ { ++ if (chunk_name == png_IDAT) ++ { ++ /* Discard trailing IDATs for the first frame */ ++ if ((png_ptr->mode & PNG_HAVE_fcTL) != 0 || ++ png_ptr->num_frames_read > 1) ++ png_error(png_ptr, "out of place IDAT"); ++ ++ PNG_PUSH_SAVE_BUFFER_IF_FULL ++ png_crc_finish(png_ptr, png_ptr->push_length); ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ } ++ ++ else if (chunk_name == png_fdAT) ++ { ++ PNG_PUSH_SAVE_BUFFER_IF_LT(4) ++ png_ensure_sequence_number(png_ptr, 4); ++ ++ if ((png_ptr->mode & PNG_HAVE_fcTL) == 0) ++ { ++ /* Discard trailing fdATs for frames other than the first */ ++ if (png_ptr->num_frames_read < 2) ++ png_error(png_ptr, "out of place fdAT"); ++ ++ PNG_PUSH_SAVE_BUFFER_IF_FULL ++ png_crc_finish(png_ptr, png_ptr->push_length); ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ } ++ ++ 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; ++ } ++ } ++ ++ else if (chunk_name == png_fcTL) ++ { ++ PNG_PUSH_SAVE_BUFFER_IF_FULL ++ 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) == 0) ++ 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; ++ } ++ ++ else if (chunk_name == png_IEND) ++ { ++ PNG_PUSH_SAVE_BUFFER_IF_FULL ++ png_warning(png_ptr, "Number of actual frames fewer than expected"); ++ png_crc_finish(png_ptr, png_ptr->push_length); ++ png_ptr->process_mode = PNG_READ_DONE_MODE; ++ png_push_have_end(png_ptr, info_ptr); ++ } ++ ++ else ++ { ++ PNG_PUSH_SAVE_BUFFER_IF_FULL ++ png_warning(png_ptr, "Skipped (ignored) a chunk " ++ "between APNG chunks"); ++ png_crc_finish(png_ptr, png_ptr->push_length); ++ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; ++ } ++ ++ return; ++ } ++#endif /* READ_APNG */ ++ + if (chunk_name == png_IDAT) + { + if ((png_ptr->mode & PNG_AFTER_IDAT) != 0) +@@ -258,6 +341,9 @@ + + else if (chunk_name == png_IDAT) + { ++#ifdef PNG_READ_APNG_SUPPORTED ++ png_have_info(png_ptr, info_ptr); ++#endif + png_ptr->idat_size = png_ptr->push_length; + png_ptr->process_mode = PNG_READ_IDAT_MODE; + png_push_have_info(png_ptr, info_ptr); +@@ -404,6 +490,20 @@ + } + #endif + ++#ifdef PNG_READ_APNG_SUPPORTED ++ else if (chunk_name == png_acTL) ++ { ++ PNG_PUSH_SAVE_BUFFER_IF_FULL ++ png_handle_acTL(png_ptr, info_ptr, png_ptr->push_length); ++ } ++ ++ else if (chunk_name == png_fcTL) ++ { ++ PNG_PUSH_SAVE_BUFFER_IF_FULL ++ png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length); ++ } ++ ++#endif /* READ_APNG */ + else + { + PNG_PUSH_SAVE_BUFFER_IF_FULL +@@ -533,7 +633,11 @@ + png_byte chunk_tag[4]; + + /* TODO: this code can be commoned up with the same code in push_read */ ++#ifdef PNG_READ_APNG_SUPPORTED ++ PNG_PUSH_SAVE_BUFFER_IF_LT(12) ++#else + PNG_PUSH_SAVE_BUFFER_IF_LT(8) ++#endif + png_push_fill_buffer(png_ptr, chunk_length, 4); + png_ptr->push_length = png_get_uint_31(png_ptr, chunk_length); + png_reset_crc(png_ptr); +@@ -541,17 +645,60 @@ + png_ptr->chunk_name = PNG_CHUNK_FROM_STRING(chunk_tag); + png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; + ++#ifdef PNG_READ_APNG_SUPPORTED ++ if (png_ptr->chunk_name != png_fdAT && png_ptr->num_frames_read > 0) ++ { ++ if ((png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED) != 0) ++ { ++ 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_ptr->chunk_name == png_IEND) ++ png_error(png_ptr, "Not enough image data"); ++ PNG_PUSH_SAVE_BUFFER_IF_FULL ++ 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 ++#ifdef PNG_READ_APNG_SUPPORTED ++ if (png_ptr->chunk_name != png_IDAT && png_ptr->num_frames_read == 0) ++#else + if (png_ptr->chunk_name != png_IDAT) ++#endif + { + png_ptr->process_mode = PNG_READ_CHUNK_MODE; + + if ((png_ptr->flags & PNG_FLAG_ZSTREAM_ENDED) == 0) + png_error(png_ptr, "Not enough compressed data"); + ++#ifdef 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; ++ ++#ifdef 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 != 0 && png_ptr->save_buffer_size != 0) +@@ -625,6 +772,16 @@ + if (!(buffer_length > 0) || buffer == NULL) + png_error(png_ptr, "No IDAT data (internal error)"); + ++#ifdef PNG_READ_APNG_SUPPORTED ++ /* If the app is not APNG-aware, decode only the first frame */ ++ if ((png_ptr->apng_flags & PNG_APNG_APP) == 0 && ++ png_ptr->num_frames_read > 0) ++ { ++ png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; ++ return; ++ } ++#endif ++ + /* This routine must process all the data it has been given + * before returning, calling the row callback as required to + * handle the uncompressed results. +@@ -1074,6 +1231,18 @@ + png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer); + } + ++#ifdef 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; ++ png_ptr->apng_flags |= PNG_APNG_APP; ++} ++#endif ++ + png_voidp PNGAPI + png_get_progressive_ptr(png_const_structrp png_ptr) + { +Index: pngset.c +=================================================================== +--- pngset.c ++++ pngset.c +@@ -241,6 +241,11 @@ + info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); + + info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); ++ ++#ifdef PNG_APNG_SUPPORTED ++ /* for non-animated png. this may be overwritten from an acTL chunk later */ ++ info_ptr->num_frames = 1; ++#endif + } + + #ifdef PNG_oFFs_SUPPORTED +@@ -1094,6 +1099,146 @@ + } + #endif /* sPLT */ + ++#ifdef 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", "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", "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); ++ ++ if (blend_op == PNG_BLEND_OP_OVER) ++ { ++ if ((png_ptr->color_type & PNG_COLOR_MASK_ALPHA) == 0 && ++ png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS) == 0) ++ { ++ png_warning(png_ptr, "PNG_BLEND_OP_OVER is meaningless " ++ "and wasteful for opaque images, ignored"); ++ blend_op = PNG_BLEND_OP_SOURCE; ++ } ++ } ++ ++ 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 > 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 (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 (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"); ++ ++ PNG_UNUSED(delay_num) ++ PNG_UNUSED(delay_den) ++} ++ ++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()"); ++ ++ if (png_ptr == NULL) ++ return 0; ++ ++ if (is_hidden != 0) ++ png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN; ++ else ++ png_ptr->apng_flags &= ~PNG_FIRST_FRAME_HIDDEN; ++ ++ PNG_UNUSED(info_ptr) ++ ++ return 1; ++} ++#endif /* APNG */ ++ + #ifdef PNG_STORE_UNKNOWN_CHUNKS_SUPPORTED + static png_byte + check_location(png_const_structrp png_ptr, int location) +Index: pngrutil.c +=================================================================== +--- pngrutil.c ++++ pngrutil.c +@@ -855,6 +855,11 @@ + filter_type = buf[11]; + interlace_type = buf[12]; + ++#ifdef 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; +@@ -2755,6 +2760,180 @@ + } + #endif + ++#ifdef 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"); ++ ++ if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) ++ { ++ png_error(png_ptr, "Missing IHDR before acTL"); ++ } ++ else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) ++ { ++ png_warning(png_ptr, "Invalid acTL after IDAT skipped"); ++ png_crc_finish(png_ptr, length); ++ return; ++ } ++ else if ((png_ptr->mode & PNG_HAVE_acTL) != 0) ++ { ++ 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 != 0) ++ 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"); ++ ++ png_ensure_sequence_number(png_ptr, length); ++ ++ if ((png_ptr->mode & PNG_HAVE_IHDR) == 0) ++ { ++ png_error(png_ptr, "Missing IHDR before fcTL"); ++ } ++ else if ((png_ptr->mode & PNG_HAVE_IDAT) != 0) ++ { ++ /* 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-4); ++ return; ++ } ++ else if ((png_ptr->mode & PNG_HAVE_fcTL) != 0) ++ { ++ png_warning(png_ptr, "Duplicate fcTL within one frame skipped"); ++ png_crc_finish(png_ptr, length-4); ++ return; ++ } ++ else if (length != 26) ++ { ++ png_warning(png_ptr, "fcTL with invalid length skipped"); ++ png_crc_finish(png_ptr, length-4); ++ return; ++ } ++ ++ 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_warning(png_ptr, "fcTL for the first frame must have zero offset"); ++ return; ++ } ++ ++ if (info_ptr != NULL) ++ { ++ if (png_ptr->num_frames_read == 0 && ++ (width != info_ptr->width || height != info_ptr->height)) ++ { ++ png_warning(png_ptr, "size in first frame's fcTL must match " ++ "the size in IHDR"); ++ return; ++ } ++ ++ /* 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) != 0 && ++ (info_ptr->valid & PNG_INFO_fcTL) == 0) ++ { ++ 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); ++ PNG_UNUSED(info_ptr) ++} ++ ++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 /* READ_APNG */ ++ + #ifdef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED + /* Utility function for png_handle_unknown; set up png_ptr::unknown_chunk */ + static int +@@ -4014,6 +4193,38 @@ + uInt avail_in; + png_bytep buffer; + ++#ifdef PNG_READ_APNG_SUPPORTED ++ png_uint_32 bytes_to_skip = 0; ++ ++ while (png_ptr->idat_size == 0 || bytes_to_skip != 0) ++ { ++ png_crc_finish(png_ptr, bytes_to_skip); ++ bytes_to_skip = 0; ++ ++ png_ptr->idat_size = png_read_chunk_header(png_ptr); ++ if (png_ptr->num_frames_read == 0) ++ { ++ if (png_ptr->chunk_name != png_IDAT) ++ png_error(png_ptr, "Not enough image data"); ++ } ++ else ++ { ++ if (png_ptr->chunk_name == png_IEND) ++ png_error(png_ptr, "Not enough image data"); ++ if (png_ptr->chunk_name != png_fdAT) ++ { ++ 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; ++ } ++ } ++#else + while (png_ptr->idat_size == 0) + { + png_crc_finish(png_ptr, 0); +@@ -4025,6 +4236,7 @@ + if (png_ptr->chunk_name != png_IDAT) + png_error(png_ptr, "Not enough image data"); + } ++#endif /* READ_APNG */ + + avail_in = png_ptr->IDAT_read_size; + +@@ -4088,6 +4300,9 @@ + + png_ptr->mode |= PNG_AFTER_IDAT; + png_ptr->flags |= PNG_FLAG_ZSTREAM_ENDED; ++#ifdef PNG_READ_APNG_SUPPORTED ++ png_ptr->num_frames_read++; ++#endif + + if (png_ptr->zstream.avail_in > 0 || png_ptr->idat_size > 0) + png_chunk_benign_error(png_ptr, "Extra compressed data"); +@@ -4526,4 +4741,80 @@ + + png_ptr->flags |= PNG_FLAG_ROW_INIT; + } ++ ++#ifdef 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; ++} ++ ++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); ++ png_ptr->info_rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, ++ png_ptr->width); ++ if (png_ptr->prev_row != NULL) ++ memset(png_ptr->prev_row, 0, png_ptr->rowbytes + 1); ++} ++ ++#ifdef PNG_PROGRESSIVE_READ_SUPPORTED ++/* same as png_read_reset() but for the progressive reader */ ++void /* PRIVATE */ ++png_progressive_read_reset(png_structp png_ptr) ++{ ++#ifdef PNG_READ_INTERLACING_SUPPORTED ++ /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ ++ ++ /* Start of interlace block */ ++ static PNG_CONST png_byte png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; ++ ++ /* Offset to next interlace block */ ++ static PNG_CONST png_byte png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; ++ ++ /* Start of interlace block in the y direction */ ++ static PNG_CONST png_byte png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; ++ ++ /* Offset to next interlace block in the y direction */ ++ static PNG_CONST png_byte png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; ++ ++ if (png_ptr->interlaced != 0) ++ { ++ if ((png_ptr->transformations & PNG_INTERLACE) == 0) ++ 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]; ++ } ++ else ++#endif /* READ_INTERLACING */ ++ { ++ png_ptr->num_rows = png_ptr->height; ++ png_ptr->iwidth = png_ptr->width; ++ } ++ png_ptr->flags &= ~PNG_FLAG_ZSTREAM_ENDED; ++ 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_ROWBYTES(png_ptr->pixel_depth, ++ png_ptr->iwidth) + 1; ++} ++#endif /* PROGRESSIVE_READ */ ++#endif /* READ_APNG */ + #endif /* READ */ +Index: pngwutil.c +=================================================================== +--- pngwutil.c ++++ pngwutil.c +@@ -901,6 +901,11 @@ + /* Write the chunk */ + png_write_complete_chunk(png_ptr, png_IHDR, buf, (png_size_t)13); + ++#ifdef PNG_WRITE_APNG_SUPPORTED ++ png_ptr->first_frame_width = width; ++ png_ptr->first_frame_height = height; ++#endif ++ + if ((png_ptr->do_filter) == PNG_NO_FILTERS) + { + if (png_ptr->color_type == PNG_COLOR_TYPE_PALETTE || +@@ -1082,7 +1087,15 @@ + optimize_cmf(data, png_image_size(png_ptr)); + #endif + ++#ifdef PNG_WRITE_APNG_SUPPORTED ++ if (png_ptr->num_frames_written == 0) ++#endif + png_write_complete_chunk(png_ptr, png_IDAT, data, size); ++#ifdef PNG_WRITE_APNG_SUPPORTED ++ else ++ png_write_fdAT(png_ptr, data, size); ++#endif /* WRITE_APNG */ ++ + png_ptr->mode |= PNG_HAVE_IDAT; + + png_ptr->zstream.next_out = data; +@@ -1128,7 +1141,15 @@ + optimize_cmf(data, png_image_size(png_ptr)); + #endif + ++#ifdef PNG_WRITE_APNG_SUPPORTED ++ if (png_ptr->num_frames_written == 0) ++#endif + png_write_complete_chunk(png_ptr, png_IDAT, data, size); ++#ifdef PNG_WRITE_APNG_SUPPORTED ++ else ++ png_write_fdAT(png_ptr, data, size); ++#endif /* WRITE_APNG */ ++ + png_ptr->zstream.avail_out = 0; + png_ptr->zstream.next_out = NULL; + png_ptr->mode |= PNG_HAVE_IDAT | PNG_AFTER_IDAT; +@@ -1941,6 +1962,82 @@ + } + #endif + ++#ifdef PNG_WRITE_APNG_SUPPORTED ++void /* PRIVATE */ ++png_write_acTL(png_structp png_ptr, ++ png_uint_32 num_frames, png_uint_32 num_plays) ++{ ++ png_byte buf[8]; ++ ++ png_debug(1, "in png_write_acTL"); ++ ++ png_ptr->num_frames_to_write = num_frames; ++ ++ if ((png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN) != 0) ++ num_frames--; ++ ++ png_save_uint_32(buf, num_frames); ++ png_save_uint_32(buf + 4, num_plays); ++ ++ png_write_complete_chunk(png_ptr, png_acTL, buf, (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) ++{ ++ png_byte buf[26]; ++ ++ png_debug(1, "in png_write_fcTL"); ++ ++ 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"); ++ 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"); ++ ++ /* 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(buf, png_ptr->next_seq_num); ++ png_save_uint_32(buf + 4, width); ++ png_save_uint_32(buf + 8, height); ++ png_save_uint_32(buf + 12, x_offset); ++ png_save_uint_32(buf + 16, y_offset); ++ png_save_uint_16(buf + 20, delay_num); ++ png_save_uint_16(buf + 22, delay_den); ++ buf[24] = dispose_op; ++ buf[25] = blend_op; ++ ++ png_write_complete_chunk(png_ptr, png_fcTL, buf, (png_size_t)26); ++ ++ png_ptr->next_seq_num++; ++} ++ ++void /* PRIVATE */ ++png_write_fdAT(png_structp png_ptr, ++ png_const_bytep data, png_size_t length) ++{ ++ png_byte buf[4]; ++ ++ png_write_chunk_header(png_ptr, png_fdAT, (png_uint_32)(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 /* WRITE_APNG */ ++ + /* Initializes the row writing capability of libpng */ + void /* PRIVATE */ + png_write_start_row(png_structrp png_ptr) +@@ -2706,4 +2803,39 @@ + } + #endif /* WRITE_FLUSH */ + } ++ ++#ifdef 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"); ++ 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 /* WRITE_APNG */ + #endif /* WRITE */ +Index: scripts/symbols.def +=================================================================== +--- scripts/symbols.def ++++ scripts/symbols.def +@@ -249,3 +249,23 @@ + png_set_check_for_invalid_index @242 + png_get_palette_max @243 + png_set_option @244 ++ png_get_acTL @245 ++ png_set_acTL @246 ++ png_get_num_frames @247 ++ png_get_num_plays @248 ++ png_get_next_frame_fcTL @249 ++ png_set_next_frame_fcTL @250 ++ png_get_next_frame_width @251 ++ png_get_next_frame_height @252 ++ png_get_next_frame_x_offset @253 ++ png_get_next_frame_y_offset @254 ++ png_get_next_frame_delay_num @255 ++ png_get_next_frame_delay_den @256 ++ png_get_next_frame_dispose_op @257 ++ png_get_next_frame_blend_op @258 ++ png_get_first_frame_is_hidden @259 ++ png_set_first_frame_is_hidden @260 ++ png_read_frame_head @261 ++ png_set_progressive_frame_fn @262 ++ png_write_frame_head @263 ++ png_write_frame_tail @264