diff options
Diffstat (limited to 'repo/libpng/libpng-1.6.37-apng.patch')
| -rw-r--r-- | repo/libpng/libpng-1.6.37-apng.patch | 1728 |
1 files changed, 1728 insertions, 0 deletions
diff --git a/repo/libpng/libpng-1.6.37-apng.patch b/repo/libpng/libpng-1.6.37-apng.patch new file mode 100644 index 0000000..8aaa50b --- /dev/null +++ b/repo/libpng/libpng-1.6.37-apng.patch @@ -0,0 +1,1728 @@ +diff -Naru libpng-1.6.37.org/png.h libpng-1.6.37/png.h +--- libpng-1.6.37.org/png.h 2019-04-19 07:21:37.398024800 +0900 ++++ libpng-1.6.37/png.h 2019-04-19 07:22:37.871245630 +0900 +@@ -330,6 +330,10 @@ + # 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" +@@ -425,6 +429,17 @@ + * 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 0x00U ++#define PNG_DISPOSE_OP_BACKGROUND 0x01U ++#define PNG_DISPOSE_OP_PREVIOUS 0x02U ++ ++/* blend_op flags from inside fcTL */ ++#define PNG_BLEND_OP_SOURCE 0x00U ++#define PNG_BLEND_OP_OVER 0x01U ++#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. + */ +@@ -746,6 +761,10 @@ + #define PNG_INFO_sCAL 0x4000U /* ESR, 1.0.6 */ + #define PNG_INFO_IDAT 0x8000U /* ESR, 1.0.6 */ + #define PNG_INFO_eXIf 0x10000U /* GR-P, 1.6.31 */ ++#ifdef PNG_APNG_SUPPORTED ++#define PNG_INFO_acTL 0x20000U ++#define PNG_INFO_fcTL 0x40000U ++#endif + + /* This is used for the transformation routines, as some of them + * change these values for the row. It also should enable using +@@ -783,6 +802,10 @@ + #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 +@@ -3226,6 +3249,74 @@ + /******************************************************************************* + * END OF HARDWARE AND SOFTWARE OPTIONS + ******************************************************************************/ ++#ifdef PNG_APNG_SUPPORTED ++PNG_EXPORT(250, 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(251, 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(252, png_uint_32, png_get_num_frames, (png_structp png_ptr, ++ png_infop info_ptr)); ++ ++PNG_EXPORT(253, png_uint_32, png_get_num_plays, (png_structp png_ptr, ++ png_infop info_ptr)); ++ ++PNG_EXPORT(254, 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(255, 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(256, png_uint_32, png_get_next_frame_width, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(257, png_uint_32, png_get_next_frame_height, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(258, png_uint_32, png_get_next_frame_x_offset, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(259, png_uint_32, png_get_next_frame_y_offset, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(260, png_uint_16, png_get_next_frame_delay_num, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(261, png_uint_16, png_get_next_frame_delay_den, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(262, png_byte, png_get_next_frame_dispose_op, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(263, png_byte, png_get_next_frame_blend_op, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(264, png_byte, png_get_first_frame_is_hidden, ++ (png_structp png_ptr, png_infop info_ptr)); ++PNG_EXPORT(265, 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(266, void, png_read_frame_head, (png_structp png_ptr, ++ png_infop info_ptr)); ++#ifdef PNG_PROGRESSIVE_READ_SUPPORTED ++PNG_EXPORT(267, 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(268, 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(269, 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. +@@ -3235,7 +3326,11 @@ + * one to use is one more than this.) + */ + #ifdef PNG_EXPORT_LAST_ORDINAL ++#ifdef PNG_APNG_SUPPORTED ++ PNG_EXPORT_LAST_ORDINAL(269); ++#else + PNG_EXPORT_LAST_ORDINAL(249); ++#endif /* PNG_APNG_SUPPORTED */ + #endif + + #ifdef __cplusplus +diff -Naru libpng-1.6.37.org/pngget.c libpng-1.6.37/pngget.c +--- libpng-1.6.37.org/pngget.c 2019-04-19 07:21:37.399024787 +0900 ++++ libpng-1.6.37/pngget.c 2019-04-19 07:22:37.850245901 +0900 +@@ -1246,4 +1246,166 @@ + # 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 -Naru libpng-1.6.37.org/pnginfo.h libpng-1.6.37/pnginfo.h +--- libpng-1.6.37.org/pnginfo.h 2019-04-19 07:21:37.399024787 +0900 ++++ libpng-1.6.37/pnginfo.h 2019-04-19 07:22:37.850245901 +0900 +@@ -263,5 +263,18 @@ + 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 -Naru libpng-1.6.37.org/pngpread.c libpng-1.6.37/pngpread.c +--- libpng-1.6.37.org/pngpread.c 2019-04-19 07:21:37.399024787 +0900 ++++ libpng-1.6.37/pngpread.c 2019-04-19 07:22:37.850245901 +0900 +@@ -195,6 +195,106 @@ + + 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) +@@ -261,6 +361,9 @@ + + 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); +@@ -406,6 +509,30 @@ + 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 + { +@@ -539,7 +666,11 @@ + 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); +@@ -547,17 +678,64 @@ + 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) +@@ -631,6 +809,15 @@ + 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. +@@ -1085,6 +1272,18 @@ + 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 -Naru libpng-1.6.37.org/pngpriv.h libpng-1.6.37/pngpriv.h +--- libpng-1.6.37.org/pngpriv.h 2019-04-19 07:21:37.399024787 +0900 ++++ libpng-1.6.37/pngpriv.h 2019-04-19 07:22:37.850245901 +0900 +@@ -637,6 +637,10 @@ + #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000U /* Have another chunk after IDAT */ + /* 0x4000U (unused) */ + #define PNG_IS_READ_STRUCT 0x8000U /* Else is a write struct */ ++#ifdef PNG_APNG_SUPPORTED ++#define PNG_HAVE_acTL 0x10000U ++#define PNG_HAVE_fcTL 0x20000U ++#endif + + /* Flags for the transformations the PNG library does on the image data */ + #define PNG_BGR 0x0001U +@@ -873,6 +877,16 @@ + #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 0x0001U ++#define PNG_APNG_APP 0x0002U ++#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. + */ +@@ -1644,6 +1658,47 @@ + */ + #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 -Naru libpng-1.6.37.org/pngread.c libpng-1.6.37/pngread.c +--- libpng-1.6.37.org/pngread.c 2019-04-19 07:21:37.400024774 +0900 ++++ libpng-1.6.37/pngread.c 2019-04-19 07:22:37.851245887 +0900 +@@ -161,6 +161,9 @@ + + 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; + } +@@ -255,6 +258,17 @@ + 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); +@@ -262,6 +276,72 @@ + } + #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 -Naru libpng-1.6.37.org/pngrutil.c libpng-1.6.37/pngrutil.c +--- libpng-1.6.37.org/pngrutil.c 2019-04-19 07:21:37.401024761 +0900 ++++ libpng-1.6.37/pngrutil.c 2019-04-19 07:22:37.853245862 +0900 +@@ -865,6 +865,11 @@ + 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; +@@ -2857,6 +2862,179 @@ + } + #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 +@@ -4165,7 +4343,38 @@ + { + 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); +@@ -4177,7 +4386,7 @@ + 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) +@@ -4240,6 +4449,9 @@ + + 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"); +@@ -4678,4 +4890,80 @@ + + 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 -Naru libpng-1.6.37.org/pngset.c libpng-1.6.37/pngset.c +--- libpng-1.6.37.org/pngset.c 2019-04-19 07:21:37.401024761 +0900 ++++ libpng-1.6.37/pngset.c 2019-04-19 07:22:37.858245798 +0900 +@@ -288,6 +288,11 @@ + 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 +@@ -1158,6 +1163,147 @@ + } + #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 == 0 || width > PNG_UINT_31_MAX) ++ png_error(png_ptr, "invalid width in fcTL (> 2^31-1)"); ++ if (height == 0 || 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 -Naru libpng-1.6.37.org/pngstruct.h libpng-1.6.37/pngstruct.h +--- libpng-1.6.37.org/pngstruct.h 2019-04-19 07:21:37.401024761 +0900 ++++ libpng-1.6.37/pngstruct.h 2019-04-19 07:22:37.854245849 +0900 +@@ -409,6 +409,27 @@ + 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 -Naru libpng-1.6.37.org/pngtest.c libpng-1.6.37/pngtest.c +--- libpng-1.6.37.org/pngtest.c 2019-04-19 07:21:37.401024761 +0900 ++++ libpng-1.6.37/pngtest.c 2019-04-19 07:22:37.854245849 +0900 +@@ -875,6 +875,10 @@ + volatile int num_passes; + int 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; +@@ -1383,6 +1387,22 @@ + } + } + #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; +@@ -1463,6 +1483,110 @@ + 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_passes; pass++) ++ { ++# ifdef calc_pass_height ++ png_uint_32 pass_height; ++ ++ if (num_passes == 7) /* interlaced */ ++ { ++ if (PNG_PASS_COLS(frame_width, pass) > 0) ++ pass_height = PNG_PASS_ROWS(frame_height, pass); ++ ++ else ++ pass_height = 0; ++ } ++ ++ else /* not interlaced */ ++ pass_height = frame_height; ++# else ++# define pass_height frame_height ++# endif ++ ++ pngtest_debug1("Writing row data for pass %d", pass); ++ for (y = 0; y < pass_height; y++) ++ { ++#ifndef SINGLE_ROWBUF_ALLOC ++ pngtest_debug2("Allocating row buffer (pass %d, y = %u)...", pass, y); ++ ++ row_buf = (png_bytep)png_malloc(read_ptr, ++ png_get_rowbytes(read_ptr, read_info_ptr)); ++ ++ pngtest_debug2("\t0x%08lx (%lu bytes)", (unsigned long)row_buf, ++ (unsigned long)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 = %u)", 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_passes; pass++) + { + # ifdef calc_pass_height +diff -Naru libpng-1.6.37.org/pngwrite.c libpng-1.6.37/pngwrite.c +--- libpng-1.6.37.org/pngwrite.c 2019-04-19 07:21:37.402024748 +0900 ++++ libpng-1.6.37/pngwrite.c 2019-04-19 07:22:37.855245836 +0900 +@@ -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 && +@@ -370,6 +374,11 @@ + 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) + { +@@ -1461,6 +1470,43 @@ + } + #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 + /* Initialize the write structure - general purpose utility. */ +diff -Naru libpng-1.6.37.org/pngwutil.c libpng-1.6.37/pngwutil.c +--- libpng-1.6.37.org/pngwutil.c 2019-04-19 07:21:37.402024748 +0900 ++++ libpng-1.6.37/pngwutil.c 2019-04-19 07:22:37.867245682 +0900 +@@ -821,6 +821,11 @@ + /* Write the chunk */ + png_write_complete_chunk(png_ptr, png_IHDR, buf, 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 || +@@ -1002,8 +1007,17 @@ + optimize_cmf(data, png_image_size(png_ptr)); + #endif + +- if (size > 0) +- png_write_complete_chunk(png_ptr, png_IDAT, data, size); ++ if (size > 0) ++#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; +@@ -1050,7 +1064,17 @@ + #endif + + if (size > 0) ++#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; +@@ -1885,6 +1909,82 @@ + } + #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) +@@ -2778,4 +2878,39 @@ + } + #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 -Naru libpng-1.6.37.org/scripts/symbols.def libpng-1.6.37/scripts/symbols.def +--- libpng-1.6.37.org/scripts/symbols.def 2019-04-19 07:21:37.405024710 +0900 ++++ libpng-1.6.37/scripts/symbols.def 2019-04-19 07:22:37.856245823 +0900 +@@ -253,3 +253,23 @@ + png_set_eXIf @247 + png_get_eXIf_1 @248 + png_set_eXIf_1 @249 ++ png_get_acTL @250 ++ png_set_acTL @251 ++ png_get_num_frames @252 ++ png_get_num_plays @253 ++ png_get_next_frame_fcTL @254 ++ png_set_next_frame_fcTL @255 ++ png_get_next_frame_width @256 ++ png_get_next_frame_height @257 ++ png_get_next_frame_x_offset @258 ++ png_get_next_frame_y_offset @259 ++ png_get_next_frame_delay_num @260 ++ png_get_next_frame_delay_den @261 ++ png_get_next_frame_dispose_op @262 ++ png_get_next_frame_blend_op @263 ++ png_get_first_frame_is_hidden @264 ++ png_set_first_frame_is_hidden @265 ++ png_read_frame_head @266 ++ png_set_progressive_frame_fn @267 ++ png_write_frame_head @268 ++ png_write_frame_tail @269 |