From c6000c9d9949b3326fb82f02431899ab6774b960 Mon Sep 17 00:00:00 2001 From: Florian Pritz Date: Sun, 16 Dec 2012 11:51:24 +0100 Subject: big cleanup --- libpng12/PKGBUILD | 47 -- libpng12/libpng-1.2.43-apng.patch | 1653 ------------------------------------- libpng12/libpng-1.2.44-apng.patch | 1653 ------------------------------------- 3 files changed, 3353 deletions(-) delete mode 100644 libpng12/PKGBUILD delete mode 100644 libpng12/libpng-1.2.43-apng.patch delete mode 100644 libpng12/libpng-1.2.44-apng.patch (limited to 'libpng12') diff --git a/libpng12/PKGBUILD b/libpng12/PKGBUILD deleted file mode 100644 index fb90e3b..0000000 --- a/libpng12/PKGBUILD +++ /dev/null @@ -1,47 +0,0 @@ -# $Id: PKGBUILD 58551 2009-11-08 22:37:12Z eric $ -# Contributor: dorphell -# Contributor: Travis Willard -# Contributor: Douglas Soares de Andrade -# Maintaoner: Jesse Jaara - -pkgname=libpng12 -_realname=libpng -pkgver=1.2.46 -pkgrel=2 -pkgdesc="A collection of routines used to create PNG format graphics files" -arch=('i686' 'x86_64') -url="http://www.libpng.org/pub/png/libpng.html" -license=('custom') -depends=('zlib') -options=('!libtool') -source=("http://sourceforge.net/projects/libpng/files/libpng12/${pkgver}/libpng-${pkgver}.tar.xz" - "http://sourceforge.net/projects/apng/files/libpng/libpng12/libpng-${pkgver}-apng.patch.gz") - -build() { - cd "${srcdir}/${_realname}-${pkgver}" - - patch -Np0 -i "${srcdir}/libpng-${pkgver}-apng.patch" - - libtoolize --force --copy - aclocal - autoconf - automake --add-missing - - ./configure --prefix=/usr - - make ECHO=echo -} - -package() { - cd "${srcdir}/${_realname}-${pkgver}" - - make ECHO=echo DESTDIR="${pkgdir}" install - - rm -rf "${pkgdir}/usr/share" - rm -rf "${pkgdir}/usr/bin/libpng-config" - rm -rf "${pkgdir}/usr/lib/"{libpng.so,libpng.a} - rm -fr "${pkgdir}/usr/lib/pkgconfig/libpng.pc" - rm -rf "${pkgdir}/usr/include/"{pngconf.h,png.h} -} -md5sums=('4a0a9662710dab35760ab8ecd6835e65' - '13b019dac361f88faed8989f0c6d5f04') diff --git a/libpng12/libpng-1.2.43-apng.patch b/libpng12/libpng-1.2.43-apng.patch deleted file mode 100644 index 00b1c24..0000000 --- a/libpng12/libpng-1.2.43-apng.patch +++ /dev/null @@ -1,1653 +0,0 @@ -Index: pngread.c -=================================================================== ---- pngread.c -+++ pngread.c -@@ -437,6 +437,11 @@ - #ifdef PNG_READ_zTXt_SUPPORTED - PNG_CONST PNG_zTXt; - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ PNG_CONST PNG_acTL; -+ PNG_CONST PNG_fcTL; -+ PNG_CONST PNG_fdAT; -+#endif - #endif /* PNG_USE_LOCAL_ARRAYS */ - png_uint_32 length = png_read_chunk_header(png_ptr); - PNG_CONST png_bytep chunk_name = png_ptr->chunk_name; -@@ -481,6 +486,9 @@ - !(png_ptr->mode & PNG_HAVE_PLTE)) - png_error(png_ptr, "Missing PLTE before IDAT"); - -+#ifdef PNG_READ_APNG_SUPPORTED -+ png_have_info(png_ptr, info_ptr); -+#endif - png_ptr->idat_size = length; - png_ptr->mode |= PNG_HAVE_IDAT; - break; -@@ -553,12 +561,97 @@ - else if (!png_memcmp(chunk_name, png_iTXt, 4)) - png_handle_iTXt(png_ptr, info_ptr, length); - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ else if (!png_memcmp(chunk_name, png_acTL, 4)) -+ png_handle_acTL(png_ptr, info_ptr, length); -+ else if (!png_memcmp(chunk_name, png_fcTL, 4)) -+ png_handle_fcTL(png_ptr, info_ptr, length); -+ else if (!png_memcmp(chunk_name, png_fdAT, 4)) -+ png_handle_fdAT(png_ptr, info_ptr, length); -+#endif - else - png_handle_unknown(png_ptr, info_ptr, length); - } - } - #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ - -+#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_crc_finish(png_ptr, 0); /* CRC from last IDAT or fdAT chunk */ -+ -+ png_read_reset(png_ptr); -+ png_ptr->mode &= ~PNG_HAVE_fcTL; -+ -+ have_chunk_after_DAT = 0; -+ for (;;) -+ { -+#ifdef PNG_USE_LOCAL_ARRAYS -+ PNG_IDAT; -+ PNG_fdAT; -+ PNG_fcTL; -+#endif -+ png_byte chunk_length[4]; -+ png_uint_32 length; -+ -+ png_read_data(png_ptr, chunk_length, 4); -+ length = png_get_uint_31(png_ptr, chunk_length); -+ -+ png_reset_crc(png_ptr); -+ png_crc_read(png_ptr, png_ptr->chunk_name, 4); -+ -+ if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) -+ { -+ /* discard trailing IDATs for the first frame */ -+ if (have_chunk_after_DAT || png_ptr->num_frames_read > 1) -+ png_error(png_ptr, "png_read_frame_head(): out of place IDAT"); -+ png_crc_finish(png_ptr, length); -+ } -+ else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) -+ { -+ png_handle_fcTL(png_ptr, info_ptr, length); -+ have_chunk_after_DAT = 1; -+ } -+ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) -+ { -+ png_ensure_sequence_number(png_ptr, length); -+ -+ /* discard trailing fdATs for frames other than the first */ -+ if (!have_chunk_after_DAT && png_ptr->num_frames_read > 1) -+ png_crc_finish(png_ptr, length - 4); -+ else if(png_ptr->mode & PNG_HAVE_fcTL) -+ { -+ png_ptr->idat_size = length - 4; -+ png_ptr->mode |= PNG_HAVE_IDAT; -+ -+ break; -+ } -+ else -+ png_error(png_ptr, "png_read_frame_head(): out of place fdAT"); -+ } -+ else -+ { -+ png_warning(png_ptr, "Skipped (ignored) a chunk " -+ "between APNG chunks"); -+ png_crc_finish(png_ptr, length); -+ } -+ } -+} -+#endif /* PNG_READ_APNG_SUPPORTED */ -+ - /* Optional call to update the users info_ptr structure */ - void PNGAPI - png_read_update_info(png_structp png_ptr, png_infop info_ptr) -@@ -599,6 +692,10 @@ - png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) - { - PNG_CONST PNG_IDAT; -+#ifdef PNG_READ_APNG_SUPPORTED -+ PNG_CONST PNG_fdAT; -+ PNG_CONST PNG_IEND; -+#endif - PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, - 0xff}; - PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; -@@ -734,13 +831,39 @@ - { - if (!(png_ptr->zstream.avail_in)) - { -- while (!png_ptr->idat_size) -+ png_uint_32 bytes_to_skip = 0; -+ -+ while (!png_ptr->idat_size || bytes_to_skip != 0) - { -- png_crc_finish(png_ptr, 0); -+ png_crc_finish(png_ptr, bytes_to_skip); -+ bytes_to_skip = 0; - - png_ptr->idat_size = png_read_chunk_header(png_ptr); -+#ifdef PNG_READ_APNG_SUPPORTED -+ if (png_ptr->num_frames_read == 0) -+ { -+#endif - if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - png_error(png_ptr, "Not enough image data"); -+#ifdef PNG_READ_APNG_SUPPORTED -+ } -+ else -+ { -+ if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) -+ png_error(png_ptr, "Not enough image data"); -+ if (png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) -+ { -+ png_warning(png_ptr, "Skipped (ignored) a chunk " -+ "between APNG chunks"); -+ bytes_to_skip = png_ptr->idat_size; -+ continue; -+ } -+ -+ png_ensure_sequence_number(png_ptr, png_ptr->idat_size); -+ -+ png_ptr->idat_size -= 4; -+ } -+#endif - } - png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_in = png_ptr->zbuf; -@@ -758,6 +881,9 @@ - png_error(png_ptr, "Extra compressed data"); - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; -+#ifdef PNG_READ_APNG_SUPPORTED -+ png_ptr->num_frames_read++; -+#endif - break; - } - if (ret != Z_OK) -@@ -1015,6 +1141,11 @@ - #ifdef PNG_READ_zTXt_SUPPORTED - PNG_CONST PNG_zTXt; - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ PNG_CONST PNG_acTL; -+ PNG_CONST PNG_fcTL; -+ PNG_CONST PNG_fdAT; -+#endif - #endif /* PNG_USE_LOCAL_ARRAYS */ - png_uint_32 length = png_read_chunk_header(png_ptr); - PNG_CONST png_bytep chunk_name = png_ptr->chunk_name; -@@ -1115,6 +1246,14 @@ - else if (!png_memcmp(chunk_name, png_iTXt, 4)) - png_handle_iTXt(png_ptr, info_ptr, length); - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ else if (!png_memcmp(chunk_name, png_acTL, 4)) -+ png_handle_acTL(png_ptr, info_ptr, length); -+ else if (!png_memcmp(chunk_name, png_fcTL, 4)) -+ png_handle_fcTL(png_ptr, info_ptr, length); -+ else if (!png_memcmp(chunk_name, png_fdAT, 4)) -+ png_handle_fdAT(png_ptr, info_ptr, length); -+#endif - else - png_handle_unknown(png_ptr, info_ptr, length); - } while (!(png_ptr->mode & PNG_HAVE_IEND)); -Index: pngget.c -=================================================================== ---- pngget.c -+++ pngget.c -@@ -842,6 +842,167 @@ - } - #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 && x_offset != NULL && -+ delay_num != NULL && delay_den != NULL && -+ dispose_op != NULL && blend_op != NULL) -+ { -+ *width = info_ptr->next_frame_width; -+ *height = info_ptr->next_frame_height; -+ *x_offset = info_ptr->next_frame_x_offset; -+ *y_offset = info_ptr->next_frame_y_offset; -+ *delay_num = info_ptr->next_frame_delay_num; -+ *delay_den = info_ptr->next_frame_delay_den; -+ *dispose_op = info_ptr->next_frame_dispose_op; -+ *blend_op = info_ptr->next_frame_blend_op; -+ return (1); -+ } -+ -+ return (0); -+} -+ -+png_uint_32 PNGAPI -+png_get_next_frame_width(png_structp png_ptr, png_infop info_ptr) -+{ -+ png_debug(1, "in png_get_next_frame_width()"); -+ -+ 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); -+ -+ return 0; -+} -+#endif /* PNG_APNG_SUPPORTED */ -+ - #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED - png_uint_32 PNGAPI - png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr, -Index: png.c -=================================================================== ---- png.c -+++ png.c -@@ -56,6 +56,11 @@ - PNG_tIME; - PNG_tRNS; - PNG_zTXt; -+#ifdef PNG_APNG_SUPPORTED -+PNG_acTL; -+PNG_fcTL; -+PNG_fdAT; -+#endif - - #ifdef PNG_READ_SUPPORTED - /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ -Index: png.h -=================================================================== ---- png.h -+++ png.h -@@ -1038,6 +1038,19 @@ - png_fixed_point int_y_blue PNG_DEPSTRUCT; - #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 -+ - } png_info; - - typedef png_info FAR * png_infop; -@@ -1139,6 +1152,10 @@ - #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ - #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ - #define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */ -+#ifdef PNG_APNG_SUPPORTED -+#define PNG_INFO_acTL 0x10000L -+#define PNG_INFO_fcTL 0x20000L -+#endif - - /* This is used for the transformation routines, as some of them - * change these values for the row. It also should enable using -@@ -1179,6 +1196,10 @@ - typedef void (PNGAPI *png_progressive_end_ptr) PNGARG((png_structp, png_infop)); - typedef void (PNGAPI *png_progressive_row_ptr) PNGARG((png_structp, png_bytep, - png_uint_32, int)); -+#ifdef PNG_APNG_SUPPORTED -+typedef void (PNGAPI *png_progressive_frame_ptr) PNGARG((png_structp, -+ png_uint_32)); -+#endif - #endif - - #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ -@@ -1524,6 +1545,39 @@ - png_uint_32 user_height_max PNG_DEPSTRUCT; - #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 -+ -+/* For png_struct.apng_flags: */ -+#define PNG_FIRST_FRAME_HIDDEN 0x0001 -+ -+/* dispose_op flags from inside fcTL */ -+#define PNG_DISPOSE_OP_NONE 0x00 -+#define PNG_DISPOSE_OP_BACKGROUND 0x01 -+#define PNG_DISPOSE_OP_PREVIOUS 0x02 -+ -+/* blend_op flags from inside fcTL */ -+#define PNG_BLEND_OP_SOURCE 0x00 -+#define PNG_BLEND_OP_OVER 0x01 -+#endif /* PNG_APNG_SUPPORTED */ -+ - /* New member added in libpng-1.0.25 and 1.2.17 */ - #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED - /* Storage for unknown chunk that the library doesn't recognize. */ -@@ -1858,6 +1912,18 @@ - extern PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr, - png_bytepp image)); - -+#ifdef PNG_WRITE_APNG_SUPPORTED -+extern PNG_EXPORT (void,png_write_frame_head) PNGARG((png_structp png_ptr, -+ png_infop png_info, png_bytepp row_pointers, -+ png_uint_32 width, png_uint_32 height, -+ png_uint_32 x_offset, png_uint_32 y_offset, -+ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, -+ png_byte blend_op)); -+ -+extern PNG_EXPORT (void,png_write_frame_tail) PNGARG((png_structp png_ptr, -+ png_infop png_info)); -+#endif -+ - /* Writes the end of the PNG file. */ - extern PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr, - png_infop info_ptr)); -@@ -2111,6 +2177,11 @@ - png_voidp progressive_ptr, - png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, - png_progressive_end_ptr end_fn)); -+#ifdef PNG_READ_APNG_SUPPORTED -+extern PNG_EXPORT(void,png_set_progressive_frame_fn) PNGARG((png_structp png_ptr, -+ png_progressive_frame_ptr frame_info_fn, -+ png_progressive_frame_ptr frame_end_fn)); -+#endif - - /* Returns the user pointer associated with the push read functions */ - extern PNG_EXPORT(png_voidp,png_get_progressive_ptr) -@@ -2551,6 +2622,59 @@ - #endif - #endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */ - -+#ifdef PNG_APNG_SUPPORTED -+extern PNG_EXPORT(png_uint_32,png_get_acTL) PNGARG((png_structp png_ptr, -+ png_infop info_ptr, png_uint_32 *num_frames, png_uint_32 *num_plays)); -+extern PNG_EXPORT(png_uint_32,png_set_acTL) PNGARG((png_structp png_ptr, -+ png_infop info_ptr, png_uint_32 num_frames, png_uint_32 num_plays)); -+extern PNG_EXPORT(png_uint_32,png_get_num_frames) PNGARG((png_structp png_ptr, -+ png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_32,png_get_num_plays) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+ -+extern PNG_EXPORT(png_uint_32,png_get_next_frame_fcTL) -+ PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 *width, -+ png_uint_32 *height, png_uint_32 *x_offset, png_uint_32 *y_offset, -+ png_uint_16 *delay_num, png_uint_16 *delay_den, png_byte *dispose_op, -+ png_byte *blend_op)); -+extern PNG_EXPORT(png_uint_32,png_set_next_frame_fcTL) -+ PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 width, -+ png_uint_32 height, png_uint_32 x_offset, png_uint_32 y_offset, -+ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, -+ png_byte blend_op)); -+extern PNG_EXPORT(void,png_ensure_fcTL_is_valid) -+ PNGARG((png_structp png_ptr, -+ png_uint_32 width, png_uint_32 height, -+ png_uint_32 x_offset, png_uint_32 y_offset, -+ png_uint_16 delay_num, png_uint_16 delay_den, -+ png_byte dispose_op, png_byte blend_op)); -+extern PNG_EXPORT(png_uint_32,png_get_next_frame_width) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_32,png_get_next_frame_height) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_32,png_get_next_frame_x_offset) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_32,png_get_next_frame_y_offset) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_16,png_get_next_frame_delay_num) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_16,png_get_next_frame_delay_den) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_byte,png_get_next_frame_dispose_op) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_byte,png_get_next_frame_blend_op) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_byte,png_get_first_frame_is_hidden) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_32,png_set_first_frame_is_hidden) -+ PNGARG((png_structp png_ptr, png_infop info_ptr, png_byte is_hidden)); -+#endif /* PNG_APNG_SUPPORTED */ -+ -+#ifdef PNG_READ_APNG_SUPPORTED -+extern PNG_EXPORT(void,png_read_frame_head) PNGARG((png_structp png_ptr, -+ png_infop info_ptr)); -+#endif -+ - #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - /* Provide a list of chunks and how they are to be handled, if the built-in - handling or default unknown chunk handling is not desired. Any chunks not -@@ -2915,6 +3039,10 @@ - #define PNG_BACKGROUND_IS_GRAY 0x800 - #define PNG_HAVE_PNG_SIGNATURE 0x1000 - #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ -+#ifdef PNG_APNG_SUPPORTED -+#define PNG_HAVE_acTL 0x4000 -+#define PNG_HAVE_fcTL 0x8000L -+#endif - - /* Flags for the transformations the PNG library does on the image data */ - #define PNG_BGR 0x0001 -@@ -3057,6 +3185,11 @@ - #define PNG_tIME png_byte png_tIME[5] = {116, 73, 77, 69, '\0'} - #define PNG_tRNS png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'} - #define PNG_zTXt png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'} -+#ifdef PNG_APNG_SUPPORTED -+#define PNG_acTL png_byte png_acTL[5] = { 97, 99, 84, 76, '\0'} -+#define PNG_fcTL png_byte png_fcTL[5] = {102, 99, 84, 76, '\0'} -+#define PNG_fdAT png_byte png_fdAT[5] = {102, 100, 65, 84, '\0'} -+#endif - - #ifdef PNG_USE_GLOBAL_ARRAYS - PNG_EXPORT_VAR (png_byte FARDATA) png_IHDR[5]; -@@ -3080,6 +3213,11 @@ - PNG_EXPORT_VAR (png_byte FARDATA) png_tIME[5]; - PNG_EXPORT_VAR (png_byte FARDATA) png_tRNS[5]; - PNG_EXPORT_VAR (png_byte FARDATA) png_zTXt[5]; -+#ifdef PNG_APNG_SUPPORTED -+PNG_EXPORT_VAR (png_byte FARDATA) png_acTL[5]; -+PNG_EXPORT_VAR (png_byte FARDATA) png_fcTL[5]; -+PNG_EXPORT_VAR (png_byte FARDATA) png_fdAT[5]; -+#endif - #endif /* PNG_USE_GLOBAL_ARRAYS */ - - #if defined(PNG_1_0_X) || defined (PNG_1_2_X) -@@ -3362,6 +3500,17 @@ - #endif - #endif - -+#ifdef PNG_WRITE_APNG_SUPPORTED -+PNG_EXTERN void png_write_acTL PNGARG((png_structp png_ptr, -+ png_uint_32 num_frames, png_uint_32 num_plays)); -+ -+PNG_EXTERN void png_write_fcTL PNGARG((png_structp png_ptr, -+ png_uint_32 width, png_uint_32 height, -+ png_uint_32 x_offset, png_uint_32 y_offset, -+ png_uint_16 delay_num, png_uint_16 delay_den, -+ png_byte dispose_op, png_byte blend_op)); -+#endif -+ - /* Called when finished processing a row of data */ - PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)) PNG_PRIVATE; - -@@ -3414,6 +3563,20 @@ - PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, - png_infop info_ptr)) PNG_PRIVATE; - -+#ifdef PNG_READ_APNG_SUPPORTED -+/* Private, reset some things to become ready for reading next frame */ -+PNG_EXTERN void png_read_reset PNGARG((png_structp png_ptr)); -+PNG_EXTERN void png_read_reinit PNGARG((png_structp png_ptr, -+ png_infop info_ptr)); -+PNG_EXTERN void png_progressive_read_reset PNGARG((png_structp png_ptr)); -+#endif -+#ifdef PNG_WRITE_APNG_SUPPORTED -+/* Private, reset some things to become ready for writing next frame */ -+PNG_EXTERN void png_write_reset PNGARG((png_structp png_ptr)); -+PNG_EXTERN void png_write_reinit PNGARG((png_structp png_ptr, -+ png_infop info_ptr, png_uint_32 width, png_uint_32 height)); -+#endif -+ - /* These are the functions that do the transformations */ - #ifdef PNG_READ_FILLER_SUPPORTED - PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, -@@ -3637,6 +3800,18 @@ - png_uint_32 length)) PNG_PRIVATE; - #endif - -+#ifdef PNG_READ_APNG_SUPPORTED -+PNG_EXTERN void png_handle_acTL PNGARG((png_structp png_ptr, png_infop info_ptr, -+ png_uint_32 length)); -+PNG_EXTERN void png_handle_fcTL PNGARG((png_structp png_ptr, png_infop info_ptr, -+ png_uint_32 length)); -+PNG_EXTERN void png_have_info PNGARG((png_structp png_ptr, png_infop info_ptr)); -+PNG_EXTERN void png_handle_fdAT PNGARG((png_structp png_ptr, png_infop info_ptr, -+ png_uint_32 length)); -+PNG_EXTERN void png_ensure_sequence_number PNGARG((png_structp png_ptr, -+ png_uint_32 length)); -+#endif -+ - PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)) PNG_PRIVATE; - -Index: pngwrite.c -=================================================================== ---- pngwrite.c -+++ pngwrite.c -@@ -57,6 +57,10 @@ - /* The rest of these check to see if the valid field has the appropriate - * flag set, and if it does, writes the chunk. - */ -+#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_WRITE_gAMA_SUPPORTED - if (info_ptr->valid & PNG_INFO_gAMA) - { -@@ -319,6 +323,10 @@ - return; - if (!(png_ptr->mode & PNG_HAVE_IDAT)) - 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 - - /* See if user wants us to write information chunks */ - if (info_ptr != NULL) -@@ -1589,4 +1597,39 @@ - params = params; - } - #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); -+} -+ -+void PNGAPI -+png_write_frame_tail(png_structp png_ptr, png_infop png_info) -+{ -+ png_debug(1, "in png_write_frame_tail"); -+ -+ png_ptr->num_frames_written++; -+} -+#endif /* PNG_WRITE_APNG_SUPPORTED */ -+ - #endif /* PNG_WRITE_SUPPORTED */ -Index: pngconf.h -=================================================================== ---- pngconf.h -+++ pngconf.h -@@ -951,6 +951,10 @@ - # define PNG_NO_READ_tEXt - # define PNG_NO_READ_zTXt - #endif -+#ifndef PNG_NO_READ_APNG -+# define PNG_READ_APNG_SUPPORTED -+# define PNG_APNG_SUPPORTED -+#endif - #ifndef PNG_NO_READ_bKGD - # define PNG_READ_bKGD_SUPPORTED - # define PNG_bKGD_SUPPORTED -@@ -1177,6 +1181,14 @@ - # define PNG_TEXT_SUPPORTED - # endif - #endif -+#ifndef PNG_NO_WRITE_APNG -+# ifndef PNG_WRITE_APNG_SUPPORTED -+# define PNG_WRITE_APNG_SUPPORTED -+# endif -+# ifndef PNG_APNG_SUPPORTED -+# define PNG_APNG_SUPPORTED -+# endif -+#endif - - #ifdef PNG_WRITE_tIME_SUPPORTED - # ifndef PNG_NO_CONVERT_tIME -Index: pngpread.c -=================================================================== ---- pngpread.c -+++ pngpread.c -@@ -206,6 +206,11 @@ - #ifdef PNG_READ_zTXt_SUPPORTED - PNG_CONST PNG_zTXt; - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ PNG_CONST PNG_acTL; -+ PNG_CONST PNG_fcTL; -+ PNG_CONST PNG_fdAT; -+#endif - #endif /* PNG_USE_LOCAL_ARRAYS */ - - /* First we make sure we have enough data for the 4 byte chunk name -@@ -232,6 +237,103 @@ - png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; - } - -+#ifdef PNG_READ_APNG_SUPPORTED -+ if (png_ptr->num_frames_read > 0 && -+ png_ptr->num_frames_read < info_ptr->num_frames) -+ { -+ if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) -+ { -+ /* Discard trailing IDATs for the first frame */ -+ if (png_ptr->mode & PNG_HAVE_fcTL || png_ptr->num_frames_read > 1) -+ png_error(png_ptr, "out of place IDAT"); -+ -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ png_push_crc_skip(png_ptr, png_ptr->push_length); -+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -+ return; -+ } -+ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) -+ { -+ if (png_ptr->buffer_size < 4) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ png_ensure_sequence_number(png_ptr, 4); -+ -+ if (!(png_ptr->mode & PNG_HAVE_fcTL)) -+ { -+ /* Discard trailing fdATs for frames other than the first */ -+ if (png_ptr->num_frames_read < 2) -+ png_error(png_ptr, "out of place fdAT"); -+ -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ png_push_crc_skip(png_ptr, png_ptr->push_length); -+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -+ return; -+ } -+ else -+ { -+ /* frame data follows */ -+ png_ptr->idat_size = png_ptr->push_length - 4; -+ png_ptr->mode |= PNG_HAVE_IDAT; -+ png_ptr->process_mode = PNG_READ_IDAT_MODE; -+ -+ return; -+ } -+ } -+ else if(!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) -+ { -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ -+ png_read_reset(png_ptr); -+ png_ptr->mode &= ~PNG_HAVE_fcTL; -+ -+ png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length); -+ -+ if (!(png_ptr->mode & PNG_HAVE_fcTL)) -+ png_error(png_ptr, "missing required fcTL chunk"); -+ -+ png_read_reinit(png_ptr, info_ptr); -+ png_progressive_read_reset(png_ptr); -+ -+ if (png_ptr->frame_info_fn != NULL) -+ (*(png_ptr->frame_info_fn))(png_ptr, png_ptr->num_frames_read); -+ -+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -+ -+ return; -+ } -+ else -+ { -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ png_warning(png_ptr, "Skipped (ignored) a chunk " -+ "between APNG chunks"); -+ png_push_crc_skip(png_ptr, png_ptr->push_length); -+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -+ return; -+ } -+ -+ return; -+ } -+#endif /* PNG_READ_APNG_SUPPORTED */ -+ - if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - if (png_ptr->mode & PNG_AFTER_IDAT) - png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; -@@ -327,6 +429,9 @@ - png_error(png_ptr, "Too many IDAT's found"); - } - -+#ifdef PNG_READ_APNG_SUPPORTED -+ png_have_info(png_ptr, info_ptr); -+#endif - png_ptr->idat_size = png_ptr->push_length; - png_ptr->mode |= PNG_HAVE_IDAT; - png_ptr->process_mode = PNG_READ_IDAT_MODE; -@@ -559,6 +664,38 @@ - } - - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4)) -+ { -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ -+ png_handle_acTL(png_ptr, info_ptr, png_ptr->push_length); -+ } -+ else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) -+ { -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ -+ png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length); -+ } -+ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) -+ { -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ -+ png_handle_fdAT(png_ptr, info_ptr, png_ptr->push_length); -+ } -+#endif /* PNG_READ_APNG_SUPPORTED */ - else - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) -@@ -738,13 +875,17 @@ - png_push_read_IDAT(png_structp png_ptr) - { - #ifdef PNG_USE_LOCAL_ARRAYS -- PNG_CONST PNG_IDAT; -+ PNG_IDAT; -+#ifdef PNG_READ_APNG_SUPPORTED -+ PNG_fdAT; -+ PNG_IEND; -+#endif - #endif - if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) - { - png_byte chunk_length[4]; - -- if (png_ptr->buffer_size < 8) -+ if (png_ptr->buffer_size < 12) - { - png_push_save_buffer(png_ptr); - return; -@@ -756,15 +897,62 @@ - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; - -- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) -+#ifdef PNG_READ_APNG_SUPPORTED -+ if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_fdAT, 4) -+ && png_ptr->num_frames_read > 0) -+ { -+ if (png_ptr->flags & PNG_FLAG_ZLIB_FINISHED) -+ { -+ png_ptr->process_mode = PNG_READ_CHUNK_MODE; -+ if (png_ptr->frame_end_fn != NULL) -+ (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read); -+ png_ptr->num_frames_read++; -+ return; -+ } -+ else -+ { -+ if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) -+ png_error(png_ptr, "Not enough image data"); -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ png_warning(png_ptr, "Skipping (ignoring) a chunk between " -+ "APNG chunks"); -+ png_crc_finish(png_ptr, png_ptr->push_length); -+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -+ return; -+ } -+ } -+ else -+#endif -+ if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4) -+#ifdef PNG_READ_APNG_SUPPORTED -+ && (png_ptr->num_frames_read == 0) -+#endif -+ ) - { - png_ptr->process_mode = PNG_READ_CHUNK_MODE; - if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) - 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 && png_ptr->save_buffer_size) - { -@@ -1725,6 +1913,17 @@ - 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; -+} -+#endif -+ - png_voidp PNGAPI - png_get_progressive_ptr(png_structp png_ptr) - { -Index: pngset.c -=================================================================== ---- pngset.c -+++ pngset.c -@@ -266,6 +266,11 @@ - info_ptr->rowbytes = (png_size_t)0; - else - info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); -+ -+#ifdef PNG_APNG_SUPPORTED -+ /* for non-animated png. this may be overritten from an acTL chunk later */ -+ info_ptr->num_frames = 1; -+#endif - } - - #ifdef PNG_oFFs_SUPPORTED -@@ -960,6 +965,142 @@ - } - #endif /* PNG_sPLT_SUPPORTED */ - -+#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 PNGAPI -+png_ensure_fcTL_is_valid(png_structp png_ptr, -+ png_uint_32 width, png_uint_32 height, -+ png_uint_32 x_offset, png_uint_32 y_offset, -+ png_uint_16 delay_num, png_uint_16 delay_den, -+ png_byte dispose_op, png_byte blend_op) -+{ -+ if (width + x_offset > png_ptr->first_frame_width || -+ height + y_offset > png_ptr->first_frame_height) -+ png_error(png_ptr, "dimensions of a frame are greater than" -+ "the ones in IHDR"); -+ if (width > PNG_UINT_31_MAX) -+ png_error(png_ptr, "invalid width in fcTL (> 2^31-1)"); -+ if (height > PNG_UINT_31_MAX) -+ png_error(png_ptr, "invalid height in fcTL (> 2^31-1)"); -+ if (x_offset > PNG_UINT_31_MAX) -+ png_error(png_ptr, "invalid x_offset in fcTL (> 2^31-1)"); -+ if (y_offset > PNG_UINT_31_MAX) -+ png_error(png_ptr, "invalid y_offset in fcTL (> 2^31-1)"); -+ -+ if (dispose_op != PNG_DISPOSE_OP_NONE && -+ dispose_op != PNG_DISPOSE_OP_BACKGROUND && -+ dispose_op != PNG_DISPOSE_OP_PREVIOUS) -+ png_error(png_ptr, "invalid dispose_op in fcTL"); -+ -+ if (blend_op != PNG_BLEND_OP_SOURCE && -+ blend_op != PNG_BLEND_OP_OVER) -+ png_error(png_ptr, "invalid blend_op in fcTL"); -+} -+ -+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; -+ -+ return 1; -+} -+#endif /* PNG_APNG_SUPPORTED */ -+ - #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED - void PNGAPI - png_set_unknown_chunks(png_structp png_ptr, -Index: pngrutil.c -=================================================================== ---- pngrutil.c -+++ pngrutil.c -@@ -451,6 +451,11 @@ - 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; -@@ -2323,6 +2328,172 @@ - } - #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_error(png_ptr, "fcTL for the first frame must have zero offset"); -+ -+ if (info_ptr != NULL) -+ { -+ if (png_ptr->num_frames_read == 0 && -+ (width != info_ptr->width || height != info_ptr->height)) -+ png_error(png_ptr, "size in first frame's fcTL must match " -+ "the size in IHDR"); -+ -+ /* the set function will do more error checking */ -+ png_set_next_frame_fcTL(png_ptr, info_ptr, width, height, -+ x_offset, y_offset, delay_num, delay_den, -+ dispose_op, blend_op); -+ -+ png_read_reinit(png_ptr, info_ptr); -+ } -+ -+ png_ptr->mode |= PNG_HAVE_fcTL; -+} -+ -+void /* PRIVATE */ -+png_have_info(png_structp png_ptr, png_infop info_ptr) -+{ -+ if((info_ptr->valid & PNG_INFO_acTL) && !(info_ptr->valid & PNG_INFO_fcTL)) -+ { -+ png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN; -+ info_ptr->num_frames++; -+ } -+} -+ -+void /* PRIVATE */ -+png_handle_fdAT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -+{ -+ png_ensure_sequence_number(png_ptr, length); -+ -+ /* This function is only called from png_read_end(), png_read_info(), -+ * and png_push_read_chunk() which means that: -+ * - the user doesn't want to read this frame -+ * - or this is an out-of-place fdAT -+ * in either case it is safe to ignore the chunk with a warning */ -+ png_warning(png_ptr, "ignoring fdAT chunk"); -+ png_crc_finish(png_ptr, length - 4); -+} -+ -+void /* PRIVATE */ -+png_ensure_sequence_number(png_structp png_ptr, png_uint_32 length) -+{ -+ png_byte data[4]; -+ png_uint_32 sequence_number; -+ -+ if (length < 4) -+ png_error(png_ptr, "invalid fcTL or fdAT chunk found"); -+ -+ png_crc_read(png_ptr, data, 4); -+ sequence_number = png_get_uint_31(png_ptr, data); -+ -+ if (sequence_number != png_ptr->next_seq_num) -+ png_error(png_ptr, "fcTL or fdAT chunk with out-of-order sequence " -+ "number found"); -+ -+ png_ptr->next_seq_num++; -+} -+#endif /* PNG_READ_APNG_SUPPORTED */ -+ - /* This function is called when we haven't found a handler for a - chunk. If there isn't a problem with the chunk itself (ie bad - chunk name, CRC, or a critical chunk), the chunk is silently ignored -@@ -3354,4 +3525,75 @@ - - 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; -+ png_ptr->flags &= ~PNG_FLAG_ROW_INIT; -+} -+ -+void /* PRIVATE */ -+png_read_reinit(png_structp png_ptr, png_infop info_ptr) -+{ -+ png_ptr->width = info_ptr->next_frame_width; -+ png_ptr->height = info_ptr->next_frame_height; -+ png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->width); -+ if (png_ptr->prev_row) -+ png_memset_check(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1); -+} -+ -+/* same as png_read_reset() but for the progressive reader */ -+void /* PRIVATE */ -+png_progressive_read_reset(png_structp png_ptr) -+{ -+#ifdef PNG_USE_LOCAL_ARRAYS -+ /* start of interlace block */ -+ const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; -+ -+ /* offset to next interlace block */ -+ const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; -+ -+ /* start of interlace block in the y direction */ -+ const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; -+ -+ /* offset to next interlace block in the y direction */ -+ const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; -+#endif -+ -+ 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 -+ { -+ png_ptr->num_rows = png_ptr->height; -+ png_ptr->iwidth = png_ptr->width; -+ } -+ png_ptr->flags &= ~PNG_FLAG_ZLIB_FINISHED; -+ if (inflateReset(&(png_ptr->zstream)) != Z_OK) -+ png_error(png_ptr, "inflateReset failed"); -+ png_ptr->zstream.avail_in = 0; -+ png_ptr->zstream.next_in = 0; -+ png_ptr->zstream.next_out = png_ptr->row_buf; -+ png_ptr->zstream.avail_out = (uInt)PNG_ROWBYTES(png_ptr->pixel_depth, -+ png_ptr->iwidth) + 1; -+} -+#endif /* PNG_READ_APNG_SUPPORTED */ - #endif /* PNG_READ_SUPPORTED */ -Index: pngwutil.c -=================================================================== ---- pngwutil.c -+++ pngwutil.c -@@ -516,6 +516,11 @@ - /* Write the chunk */ - png_write_chunk(png_ptr, (png_bytep)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 -+ - /* Initialize zlib with PNG info */ - png_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; -@@ -641,6 +646,9 @@ - { - #ifdef PNG_USE_LOCAL_ARRAYS - PNG_IDAT; -+#ifdef PNG_WRITE_APNG_SUPPORTED -+ PNG_fdAT; -+#endif - #endif - - png_debug(1, "in png_write_IDAT"); -@@ -686,7 +694,28 @@ - "Invalid zlib compression method or flags in IDAT"); - } - -+#ifdef PNG_WRITE_APNG_SUPPORTED -+ if(png_ptr->num_frames_written == 0) -+#endif - png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length); -+#ifdef PNG_WRITE_APNG_SUPPORTED -+ else -+ { -+ png_byte buf[4]; -+ -+ png_write_chunk_start(png_ptr, (png_bytep)png_fdAT, 4 + length); -+ -+ png_save_uint_32(buf, png_ptr->next_seq_num); -+ png_write_chunk_data(png_ptr, buf, 4); -+ -+ png_write_chunk_data(png_ptr, data, length); -+ -+ png_write_chunk_end(png_ptr); -+ -+ png_ptr->next_seq_num++; -+ } -+#endif -+ - png_ptr->mode |= PNG_HAVE_IDAT; - } - -@@ -1754,6 +1783,70 @@ - } - #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) -+{ -+#ifdef PNG_USE_LOCAL_ARRAYS -+ PNG_acTL; -+#endif -+ png_byte data[16]; -+ -+ 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(data, num_frames); -+ png_save_uint_32(data + 4, num_plays); -+ -+ png_write_chunk(png_ptr, (png_bytep)png_acTL, data, (png_size_t)8); -+} -+ -+void /* PRIVATE */ -+png_write_fcTL(png_structp png_ptr, png_uint_32 width, png_uint_32 height, -+ png_uint_32 x_offset, png_uint_32 y_offset, -+ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, -+ png_byte blend_op) -+{ -+#ifdef PNG_USE_LOCAL_ARRAYS -+ PNG_fcTL; -+#endif -+ png_byte data[26]; -+ -+ png_debug(1, "in png_write_fcTL"); -+ -+ 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(data, png_ptr->next_seq_num); -+ png_save_uint_32(data + 4, width); -+ png_save_uint_32(data + 8, height); -+ png_save_uint_32(data + 12, x_offset); -+ png_save_uint_32(data + 16, y_offset); -+ png_save_uint_16(data + 20, delay_num); -+ png_save_uint_16(data + 22, delay_den); -+ data[24] = dispose_op; -+ data[25] = blend_op; -+ -+ png_write_chunk(png_ptr, (png_bytep)png_fcTL, data, (png_size_t)26); -+ -+ png_ptr->next_seq_num++; -+} -+#endif /* PNG_WRITE_APNG_SUPPORTED */ -+ - /* Initializes the row writing capability of libpng */ - void /* PRIVATE */ - png_write_start_row(png_structp png_ptr) -@@ -2159,8 +2252,8 @@ - #ifndef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - if (png_ptr->row_number == 0 && filter_to_do == PNG_ALL_FILTERS) - { -- /* These will never be selected so we need not test them. */ -- filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH); -+ /* These use previous row */ -+ filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_AVG | PNG_FILTER_PAETH); - } - #endif - -@@ -2829,4 +2922,39 @@ - } - #endif - } -+ -+#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 - #endif /* PNG_WRITE_SUPPORTED */ -Index: pngrtran.c -=================================================================== ---- pngrtran.c -+++ pngrtran.c -@@ -1352,7 +1352,7 @@ - * pixels. This check added to libpng-1.2.19 - */ - #if (PNG_WARN_UNINITIALIZED_ROW==1) -- png_error(png_ptr, "Uninitialized row"); -+ png_warning(png_ptr, "Uninitialized row"); - #else - png_warning(png_ptr, "Uninitialized row"); - #endif diff --git a/libpng12/libpng-1.2.44-apng.patch b/libpng12/libpng-1.2.44-apng.patch deleted file mode 100644 index c283439..0000000 --- a/libpng12/libpng-1.2.44-apng.patch +++ /dev/null @@ -1,1653 +0,0 @@ -Index: pngread.c -=================================================================== ---- pngread.c -+++ pngread.c -@@ -437,6 +437,11 @@ - #ifdef PNG_READ_zTXt_SUPPORTED - PNG_CONST PNG_zTXt; - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ PNG_CONST PNG_acTL; -+ PNG_CONST PNG_fcTL; -+ PNG_CONST PNG_fdAT; -+#endif - #endif /* PNG_USE_LOCAL_ARRAYS */ - png_uint_32 length = png_read_chunk_header(png_ptr); - PNG_CONST png_bytep chunk_name = png_ptr->chunk_name; -@@ -481,6 +486,9 @@ - !(png_ptr->mode & PNG_HAVE_PLTE)) - png_error(png_ptr, "Missing PLTE before IDAT"); - -+#ifdef PNG_READ_APNG_SUPPORTED -+ png_have_info(png_ptr, info_ptr); -+#endif - png_ptr->idat_size = length; - png_ptr->mode |= PNG_HAVE_IDAT; - break; -@@ -553,12 +561,97 @@ - else if (!png_memcmp(chunk_name, png_iTXt, 4)) - png_handle_iTXt(png_ptr, info_ptr, length); - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ else if (!png_memcmp(chunk_name, png_acTL, 4)) -+ png_handle_acTL(png_ptr, info_ptr, length); -+ else if (!png_memcmp(chunk_name, png_fcTL, 4)) -+ png_handle_fcTL(png_ptr, info_ptr, length); -+ else if (!png_memcmp(chunk_name, png_fdAT, 4)) -+ png_handle_fdAT(png_ptr, info_ptr, length); -+#endif - else - png_handle_unknown(png_ptr, info_ptr, length); - } - } - #endif /* PNG_SEQUENTIAL_READ_SUPPORTED */ - -+#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_crc_finish(png_ptr, 0); /* CRC from last IDAT or fdAT chunk */ -+ -+ png_read_reset(png_ptr); -+ png_ptr->mode &= ~PNG_HAVE_fcTL; -+ -+ have_chunk_after_DAT = 0; -+ for (;;) -+ { -+#ifdef PNG_USE_LOCAL_ARRAYS -+ PNG_IDAT; -+ PNG_fdAT; -+ PNG_fcTL; -+#endif -+ png_byte chunk_length[4]; -+ png_uint_32 length; -+ -+ png_read_data(png_ptr, chunk_length, 4); -+ length = png_get_uint_31(png_ptr, chunk_length); -+ -+ png_reset_crc(png_ptr); -+ png_crc_read(png_ptr, png_ptr->chunk_name, 4); -+ -+ if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) -+ { -+ /* discard trailing IDATs for the first frame */ -+ if (have_chunk_after_DAT || png_ptr->num_frames_read > 1) -+ png_error(png_ptr, "png_read_frame_head(): out of place IDAT"); -+ png_crc_finish(png_ptr, length); -+ } -+ else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) -+ { -+ png_handle_fcTL(png_ptr, info_ptr, length); -+ have_chunk_after_DAT = 1; -+ } -+ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) -+ { -+ png_ensure_sequence_number(png_ptr, length); -+ -+ /* discard trailing fdATs for frames other than the first */ -+ if (!have_chunk_after_DAT && png_ptr->num_frames_read > 1) -+ png_crc_finish(png_ptr, length - 4); -+ else if(png_ptr->mode & PNG_HAVE_fcTL) -+ { -+ png_ptr->idat_size = length - 4; -+ png_ptr->mode |= PNG_HAVE_IDAT; -+ -+ break; -+ } -+ else -+ png_error(png_ptr, "png_read_frame_head(): out of place fdAT"); -+ } -+ else -+ { -+ png_warning(png_ptr, "Skipped (ignored) a chunk " -+ "between APNG chunks"); -+ png_crc_finish(png_ptr, length); -+ } -+ } -+} -+#endif /* PNG_READ_APNG_SUPPORTED */ -+ - /* Optional call to update the users info_ptr structure */ - void PNGAPI - png_read_update_info(png_structp png_ptr, png_infop info_ptr) -@@ -599,6 +692,10 @@ - png_read_row(png_structp png_ptr, png_bytep row, png_bytep dsp_row) - { - PNG_CONST PNG_IDAT; -+#ifdef PNG_READ_APNG_SUPPORTED -+ PNG_CONST PNG_fdAT; -+ PNG_CONST PNG_IEND; -+#endif - PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, - 0xff}; - PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; -@@ -734,13 +831,39 @@ - { - if (!(png_ptr->zstream.avail_in)) - { -- while (!png_ptr->idat_size) -+ png_uint_32 bytes_to_skip = 0; -+ -+ while (!png_ptr->idat_size || bytes_to_skip != 0) - { -- png_crc_finish(png_ptr, 0); -+ png_crc_finish(png_ptr, bytes_to_skip); -+ bytes_to_skip = 0; - - png_ptr->idat_size = png_read_chunk_header(png_ptr); -+#ifdef PNG_READ_APNG_SUPPORTED -+ if (png_ptr->num_frames_read == 0) -+ { -+#endif - if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - png_error(png_ptr, "Not enough image data"); -+#ifdef PNG_READ_APNG_SUPPORTED -+ } -+ else -+ { -+ if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) -+ png_error(png_ptr, "Not enough image data"); -+ if (png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) -+ { -+ png_warning(png_ptr, "Skipped (ignored) a chunk " -+ "between APNG chunks"); -+ bytes_to_skip = png_ptr->idat_size; -+ continue; -+ } -+ -+ png_ensure_sequence_number(png_ptr, png_ptr->idat_size); -+ -+ png_ptr->idat_size -= 4; -+ } -+#endif - } - png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size; - png_ptr->zstream.next_in = png_ptr->zbuf; -@@ -758,6 +881,9 @@ - png_error(png_ptr, "Extra compressed data"); - png_ptr->mode |= PNG_AFTER_IDAT; - png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED; -+#ifdef PNG_READ_APNG_SUPPORTED -+ png_ptr->num_frames_read++; -+#endif - break; - } - if (ret != Z_OK) -@@ -1015,6 +1141,11 @@ - #ifdef PNG_READ_zTXt_SUPPORTED - PNG_CONST PNG_zTXt; - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ PNG_CONST PNG_acTL; -+ PNG_CONST PNG_fcTL; -+ PNG_CONST PNG_fdAT; -+#endif - #endif /* PNG_USE_LOCAL_ARRAYS */ - png_uint_32 length = png_read_chunk_header(png_ptr); - PNG_CONST png_bytep chunk_name = png_ptr->chunk_name; -@@ -1115,6 +1246,14 @@ - else if (!png_memcmp(chunk_name, png_iTXt, 4)) - png_handle_iTXt(png_ptr, info_ptr, length); - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ else if (!png_memcmp(chunk_name, png_acTL, 4)) -+ png_handle_acTL(png_ptr, info_ptr, length); -+ else if (!png_memcmp(chunk_name, png_fcTL, 4)) -+ png_handle_fcTL(png_ptr, info_ptr, length); -+ else if (!png_memcmp(chunk_name, png_fdAT, 4)) -+ png_handle_fdAT(png_ptr, info_ptr, length); -+#endif - else - png_handle_unknown(png_ptr, info_ptr, length); - } while (!(png_ptr->mode & PNG_HAVE_IEND)); -Index: pngget.c -=================================================================== ---- pngget.c -+++ pngget.c -@@ -842,6 +842,167 @@ - } - #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 && x_offset != NULL && -+ delay_num != NULL && delay_den != NULL && -+ dispose_op != NULL && blend_op != NULL) -+ { -+ *width = info_ptr->next_frame_width; -+ *height = info_ptr->next_frame_height; -+ *x_offset = info_ptr->next_frame_x_offset; -+ *y_offset = info_ptr->next_frame_y_offset; -+ *delay_num = info_ptr->next_frame_delay_num; -+ *delay_den = info_ptr->next_frame_delay_den; -+ *dispose_op = info_ptr->next_frame_dispose_op; -+ *blend_op = info_ptr->next_frame_blend_op; -+ return (1); -+ } -+ -+ return (0); -+} -+ -+png_uint_32 PNGAPI -+png_get_next_frame_width(png_structp png_ptr, png_infop info_ptr) -+{ -+ png_debug(1, "in png_get_next_frame_width()"); -+ -+ 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); -+ -+ return 0; -+} -+#endif /* PNG_APNG_SUPPORTED */ -+ - #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED - png_uint_32 PNGAPI - png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr, -Index: png.c -=================================================================== ---- png.c -+++ png.c -@@ -56,6 +56,11 @@ - PNG_tIME; - PNG_tRNS; - PNG_zTXt; -+#ifdef PNG_APNG_SUPPORTED -+PNG_acTL; -+PNG_fcTL; -+PNG_fdAT; -+#endif - - #ifdef PNG_READ_SUPPORTED - /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ -Index: png.h -=================================================================== ---- png.h -+++ png.h -@@ -1041,6 +1041,19 @@ - png_fixed_point int_y_blue PNG_DEPSTRUCT; - #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 -+ - } png_info; - - typedef png_info FAR * png_infop; -@@ -1142,6 +1155,10 @@ - #define PNG_INFO_sPLT 0x2000 /* ESR, 1.0.6 */ - #define PNG_INFO_sCAL 0x4000 /* ESR, 1.0.6 */ - #define PNG_INFO_IDAT 0x8000L /* ESR, 1.0.6 */ -+#ifdef PNG_APNG_SUPPORTED -+#define PNG_INFO_acTL 0x10000L -+#define PNG_INFO_fcTL 0x20000L -+#endif - - /* This is used for the transformation routines, as some of them - * change these values for the row. It also should enable using -@@ -1182,6 +1199,10 @@ - typedef void (PNGAPI *png_progressive_end_ptr) PNGARG((png_structp, png_infop)); - typedef void (PNGAPI *png_progressive_row_ptr) PNGARG((png_structp, png_bytep, - png_uint_32, int)); -+#ifdef PNG_APNG_SUPPORTED -+typedef void (PNGAPI *png_progressive_frame_ptr) PNGARG((png_structp, -+ png_uint_32)); -+#endif - #endif - - #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \ -@@ -1527,6 +1548,39 @@ - png_uint_32 user_height_max PNG_DEPSTRUCT; - #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 -+ -+/* For png_struct.apng_flags: */ -+#define PNG_FIRST_FRAME_HIDDEN 0x0001 -+ -+/* dispose_op flags from inside fcTL */ -+#define PNG_DISPOSE_OP_NONE 0x00 -+#define PNG_DISPOSE_OP_BACKGROUND 0x01 -+#define PNG_DISPOSE_OP_PREVIOUS 0x02 -+ -+/* blend_op flags from inside fcTL */ -+#define PNG_BLEND_OP_SOURCE 0x00 -+#define PNG_BLEND_OP_OVER 0x01 -+#endif /* PNG_APNG_SUPPORTED */ -+ - /* New member added in libpng-1.0.25 and 1.2.17 */ - #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED - /* Storage for unknown chunk that the library doesn't recognize. */ -@@ -1861,6 +1915,18 @@ - extern PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr, - png_bytepp image)); - -+#ifdef PNG_WRITE_APNG_SUPPORTED -+extern PNG_EXPORT (void,png_write_frame_head) PNGARG((png_structp png_ptr, -+ png_infop png_info, png_bytepp row_pointers, -+ png_uint_32 width, png_uint_32 height, -+ png_uint_32 x_offset, png_uint_32 y_offset, -+ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, -+ png_byte blend_op)); -+ -+extern PNG_EXPORT (void,png_write_frame_tail) PNGARG((png_structp png_ptr, -+ png_infop png_info)); -+#endif -+ - /* Writes the end of the PNG file. */ - extern PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr, - png_infop info_ptr)); -@@ -2114,6 +2180,11 @@ - png_voidp progressive_ptr, - png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, - png_progressive_end_ptr end_fn)); -+#ifdef PNG_READ_APNG_SUPPORTED -+extern PNG_EXPORT(void,png_set_progressive_frame_fn) PNGARG((png_structp png_ptr, -+ png_progressive_frame_ptr frame_info_fn, -+ png_progressive_frame_ptr frame_end_fn)); -+#endif - - /* Returns the user pointer associated with the push read functions */ - extern PNG_EXPORT(png_voidp,png_get_progressive_ptr) -@@ -2554,6 +2625,59 @@ - #endif - #endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */ - -+#ifdef PNG_APNG_SUPPORTED -+extern PNG_EXPORT(png_uint_32,png_get_acTL) PNGARG((png_structp png_ptr, -+ png_infop info_ptr, png_uint_32 *num_frames, png_uint_32 *num_plays)); -+extern PNG_EXPORT(png_uint_32,png_set_acTL) PNGARG((png_structp png_ptr, -+ png_infop info_ptr, png_uint_32 num_frames, png_uint_32 num_plays)); -+extern PNG_EXPORT(png_uint_32,png_get_num_frames) PNGARG((png_structp png_ptr, -+ png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_32,png_get_num_plays) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+ -+extern PNG_EXPORT(png_uint_32,png_get_next_frame_fcTL) -+ PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 *width, -+ png_uint_32 *height, png_uint_32 *x_offset, png_uint_32 *y_offset, -+ png_uint_16 *delay_num, png_uint_16 *delay_den, png_byte *dispose_op, -+ png_byte *blend_op)); -+extern PNG_EXPORT(png_uint_32,png_set_next_frame_fcTL) -+ PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 width, -+ png_uint_32 height, png_uint_32 x_offset, png_uint_32 y_offset, -+ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, -+ png_byte blend_op)); -+extern PNG_EXPORT(void,png_ensure_fcTL_is_valid) -+ PNGARG((png_structp png_ptr, -+ png_uint_32 width, png_uint_32 height, -+ png_uint_32 x_offset, png_uint_32 y_offset, -+ png_uint_16 delay_num, png_uint_16 delay_den, -+ png_byte dispose_op, png_byte blend_op)); -+extern PNG_EXPORT(png_uint_32,png_get_next_frame_width) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_32,png_get_next_frame_height) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_32,png_get_next_frame_x_offset) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_32,png_get_next_frame_y_offset) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_16,png_get_next_frame_delay_num) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_16,png_get_next_frame_delay_den) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_byte,png_get_next_frame_dispose_op) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_byte,png_get_next_frame_blend_op) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_byte,png_get_first_frame_is_hidden) -+ PNGARG((png_structp png_ptr, png_infop info_ptr)); -+extern PNG_EXPORT(png_uint_32,png_set_first_frame_is_hidden) -+ PNGARG((png_structp png_ptr, png_infop info_ptr, png_byte is_hidden)); -+#endif /* PNG_APNG_SUPPORTED */ -+ -+#ifdef PNG_READ_APNG_SUPPORTED -+extern PNG_EXPORT(void,png_read_frame_head) PNGARG((png_structp png_ptr, -+ png_infop info_ptr)); -+#endif -+ - #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED - /* Provide a list of chunks and how they are to be handled, if the built-in - handling or default unknown chunk handling is not desired. Any chunks not -@@ -2918,6 +3042,10 @@ - #define PNG_BACKGROUND_IS_GRAY 0x800 - #define PNG_HAVE_PNG_SIGNATURE 0x1000 - #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */ -+#ifdef PNG_APNG_SUPPORTED -+#define PNG_HAVE_acTL 0x4000 -+#define PNG_HAVE_fcTL 0x8000L -+#endif - - /* Flags for the transformations the PNG library does on the image data */ - #define PNG_BGR 0x0001 -@@ -3060,6 +3188,11 @@ - #define PNG_tIME png_byte png_tIME[5] = {116, 73, 77, 69, '\0'} - #define PNG_tRNS png_byte png_tRNS[5] = {116, 82, 78, 83, '\0'} - #define PNG_zTXt png_byte png_zTXt[5] = {122, 84, 88, 116, '\0'} -+#ifdef PNG_APNG_SUPPORTED -+#define PNG_acTL png_byte png_acTL[5] = { 97, 99, 84, 76, '\0'} -+#define PNG_fcTL png_byte png_fcTL[5] = {102, 99, 84, 76, '\0'} -+#define PNG_fdAT png_byte png_fdAT[5] = {102, 100, 65, 84, '\0'} -+#endif - - #ifdef PNG_USE_GLOBAL_ARRAYS - PNG_EXPORT_VAR (png_byte FARDATA) png_IHDR[5]; -@@ -3083,6 +3216,11 @@ - PNG_EXPORT_VAR (png_byte FARDATA) png_tIME[5]; - PNG_EXPORT_VAR (png_byte FARDATA) png_tRNS[5]; - PNG_EXPORT_VAR (png_byte FARDATA) png_zTXt[5]; -+#ifdef PNG_APNG_SUPPORTED -+PNG_EXPORT_VAR (png_byte FARDATA) png_acTL[5]; -+PNG_EXPORT_VAR (png_byte FARDATA) png_fcTL[5]; -+PNG_EXPORT_VAR (png_byte FARDATA) png_fdAT[5]; -+#endif - #endif /* PNG_USE_GLOBAL_ARRAYS */ - - #if defined(PNG_1_0_X) || defined (PNG_1_2_X) -@@ -3365,6 +3503,17 @@ - #endif - #endif - -+#ifdef PNG_WRITE_APNG_SUPPORTED -+PNG_EXTERN void png_write_acTL PNGARG((png_structp png_ptr, -+ png_uint_32 num_frames, png_uint_32 num_plays)); -+ -+PNG_EXTERN void png_write_fcTL PNGARG((png_structp png_ptr, -+ png_uint_32 width, png_uint_32 height, -+ png_uint_32 x_offset, png_uint_32 y_offset, -+ png_uint_16 delay_num, png_uint_16 delay_den, -+ png_byte dispose_op, png_byte blend_op)); -+#endif -+ - /* Called when finished processing a row of data */ - PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr)) PNG_PRIVATE; - -@@ -3417,6 +3566,20 @@ - PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr, - png_infop info_ptr)) PNG_PRIVATE; - -+#ifdef PNG_READ_APNG_SUPPORTED -+/* Private, reset some things to become ready for reading next frame */ -+PNG_EXTERN void png_read_reset PNGARG((png_structp png_ptr)); -+PNG_EXTERN void png_read_reinit PNGARG((png_structp png_ptr, -+ png_infop info_ptr)); -+PNG_EXTERN void png_progressive_read_reset PNGARG((png_structp png_ptr)); -+#endif -+#ifdef PNG_WRITE_APNG_SUPPORTED -+/* Private, reset some things to become ready for writing next frame */ -+PNG_EXTERN void png_write_reset PNGARG((png_structp png_ptr)); -+PNG_EXTERN void png_write_reinit PNGARG((png_structp png_ptr, -+ png_infop info_ptr, png_uint_32 width, png_uint_32 height)); -+#endif -+ - /* These are the functions that do the transformations */ - #ifdef PNG_READ_FILLER_SUPPORTED - PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info, -@@ -3640,6 +3803,18 @@ - png_uint_32 length)) PNG_PRIVATE; - #endif - -+#ifdef PNG_READ_APNG_SUPPORTED -+PNG_EXTERN void png_handle_acTL PNGARG((png_structp png_ptr, png_infop info_ptr, -+ png_uint_32 length)); -+PNG_EXTERN void png_handle_fcTL PNGARG((png_structp png_ptr, png_infop info_ptr, -+ png_uint_32 length)); -+PNG_EXTERN void png_have_info PNGARG((png_structp png_ptr, png_infop info_ptr)); -+PNG_EXTERN void png_handle_fdAT PNGARG((png_structp png_ptr, png_infop info_ptr, -+ png_uint_32 length)); -+PNG_EXTERN void png_ensure_sequence_number PNGARG((png_structp png_ptr, -+ png_uint_32 length)); -+#endif -+ - PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr, - png_infop info_ptr, png_uint_32 length)) PNG_PRIVATE; - -Index: pngwrite.c -=================================================================== ---- pngwrite.c -+++ pngwrite.c -@@ -57,6 +57,10 @@ - /* The rest of these check to see if the valid field has the appropriate - * flag set, and if it does, writes the chunk. - */ -+#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_WRITE_gAMA_SUPPORTED - if (info_ptr->valid & PNG_INFO_gAMA) - { -@@ -319,6 +323,10 @@ - return; - if (!(png_ptr->mode & PNG_HAVE_IDAT)) - 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 - - /* See if user wants us to write information chunks */ - if (info_ptr != NULL) -@@ -1589,4 +1597,39 @@ - params = params; - } - #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); -+} -+ -+void PNGAPI -+png_write_frame_tail(png_structp png_ptr, png_infop png_info) -+{ -+ png_debug(1, "in png_write_frame_tail"); -+ -+ png_ptr->num_frames_written++; -+} -+#endif /* PNG_WRITE_APNG_SUPPORTED */ -+ - #endif /* PNG_WRITE_SUPPORTED */ -Index: pngconf.h -=================================================================== ---- pngconf.h -+++ pngconf.h -@@ -951,6 +951,10 @@ - # define PNG_NO_READ_tEXt - # define PNG_NO_READ_zTXt - #endif -+#ifndef PNG_NO_READ_APNG -+# define PNG_READ_APNG_SUPPORTED -+# define PNG_APNG_SUPPORTED -+#endif - #ifndef PNG_NO_READ_bKGD - # define PNG_READ_bKGD_SUPPORTED - # define PNG_bKGD_SUPPORTED -@@ -1177,6 +1181,14 @@ - # define PNG_TEXT_SUPPORTED - # endif - #endif -+#ifndef PNG_NO_WRITE_APNG -+# ifndef PNG_WRITE_APNG_SUPPORTED -+# define PNG_WRITE_APNG_SUPPORTED -+# endif -+# ifndef PNG_APNG_SUPPORTED -+# define PNG_APNG_SUPPORTED -+# endif -+#endif - - #ifdef PNG_WRITE_tIME_SUPPORTED - # ifndef PNG_NO_CONVERT_tIME -Index: pngpread.c -=================================================================== ---- pngpread.c -+++ pngpread.c -@@ -206,6 +206,11 @@ - #ifdef PNG_READ_zTXt_SUPPORTED - PNG_CONST PNG_zTXt; - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ PNG_CONST PNG_acTL; -+ PNG_CONST PNG_fcTL; -+ PNG_CONST PNG_fdAT; -+#endif - #endif /* PNG_USE_LOCAL_ARRAYS */ - - /* First we make sure we have enough data for the 4 byte chunk name -@@ -232,6 +237,103 @@ - png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; - } - -+#ifdef PNG_READ_APNG_SUPPORTED -+ if (png_ptr->num_frames_read > 0 && -+ png_ptr->num_frames_read < info_ptr->num_frames) -+ { -+ if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) -+ { -+ /* Discard trailing IDATs for the first frame */ -+ if (png_ptr->mode & PNG_HAVE_fcTL || png_ptr->num_frames_read > 1) -+ png_error(png_ptr, "out of place IDAT"); -+ -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ png_push_crc_skip(png_ptr, png_ptr->push_length); -+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -+ return; -+ } -+ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) -+ { -+ if (png_ptr->buffer_size < 4) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ png_ensure_sequence_number(png_ptr, 4); -+ -+ if (!(png_ptr->mode & PNG_HAVE_fcTL)) -+ { -+ /* Discard trailing fdATs for frames other than the first */ -+ if (png_ptr->num_frames_read < 2) -+ png_error(png_ptr, "out of place fdAT"); -+ -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ png_push_crc_skip(png_ptr, png_ptr->push_length); -+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -+ return; -+ } -+ else -+ { -+ /* frame data follows */ -+ png_ptr->idat_size = png_ptr->push_length - 4; -+ png_ptr->mode |= PNG_HAVE_IDAT; -+ png_ptr->process_mode = PNG_READ_IDAT_MODE; -+ -+ return; -+ } -+ } -+ else if(!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) -+ { -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ -+ png_read_reset(png_ptr); -+ png_ptr->mode &= ~PNG_HAVE_fcTL; -+ -+ png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length); -+ -+ if (!(png_ptr->mode & PNG_HAVE_fcTL)) -+ png_error(png_ptr, "missing required fcTL chunk"); -+ -+ png_read_reinit(png_ptr, info_ptr); -+ png_progressive_read_reset(png_ptr); -+ -+ if (png_ptr->frame_info_fn != NULL) -+ (*(png_ptr->frame_info_fn))(png_ptr, png_ptr->num_frames_read); -+ -+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -+ -+ return; -+ } -+ else -+ { -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ png_warning(png_ptr, "Skipped (ignored) a chunk " -+ "between APNG chunks"); -+ png_push_crc_skip(png_ptr, png_ptr->push_length); -+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -+ return; -+ } -+ -+ return; -+ } -+#endif /* PNG_READ_APNG_SUPPORTED */ -+ - if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) - if (png_ptr->mode & PNG_AFTER_IDAT) - png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT; -@@ -327,6 +429,9 @@ - png_error(png_ptr, "Too many IDAT's found"); - } - -+#ifdef PNG_READ_APNG_SUPPORTED -+ png_have_info(png_ptr, info_ptr); -+#endif - png_ptr->idat_size = png_ptr->push_length; - png_ptr->mode |= PNG_HAVE_IDAT; - png_ptr->process_mode = PNG_READ_IDAT_MODE; -@@ -559,6 +664,38 @@ - } - - #endif -+#ifdef PNG_READ_APNG_SUPPORTED -+ else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4)) -+ { -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ -+ png_handle_acTL(png_ptr, info_ptr, png_ptr->push_length); -+ } -+ else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4)) -+ { -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ -+ png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length); -+ } -+ else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4)) -+ { -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ -+ png_handle_fdAT(png_ptr, info_ptr, png_ptr->push_length); -+ } -+#endif /* PNG_READ_APNG_SUPPORTED */ - else - { - if (png_ptr->push_length + 4 > png_ptr->buffer_size) -@@ -738,13 +875,17 @@ - png_push_read_IDAT(png_structp png_ptr) - { - #ifdef PNG_USE_LOCAL_ARRAYS -- PNG_CONST PNG_IDAT; -+ PNG_IDAT; -+#ifdef PNG_READ_APNG_SUPPORTED -+ PNG_fdAT; -+ PNG_IEND; -+#endif - #endif - if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER)) - { - png_byte chunk_length[4]; - -- if (png_ptr->buffer_size < 8) -+ if (png_ptr->buffer_size < 12) - { - png_push_save_buffer(png_ptr); - return; -@@ -756,15 +897,62 @@ - png_crc_read(png_ptr, png_ptr->chunk_name, 4); - png_ptr->mode |= PNG_HAVE_CHUNK_HEADER; - -- if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4)) -+#ifdef PNG_READ_APNG_SUPPORTED -+ if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_fdAT, 4) -+ && png_ptr->num_frames_read > 0) -+ { -+ if (png_ptr->flags & PNG_FLAG_ZLIB_FINISHED) -+ { -+ png_ptr->process_mode = PNG_READ_CHUNK_MODE; -+ if (png_ptr->frame_end_fn != NULL) -+ (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read); -+ png_ptr->num_frames_read++; -+ return; -+ } -+ else -+ { -+ if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4)) -+ png_error(png_ptr, "Not enough image data"); -+ if (png_ptr->push_length + 4 > png_ptr->buffer_size) -+ { -+ png_push_save_buffer(png_ptr); -+ return; -+ } -+ png_warning(png_ptr, "Skipping (ignoring) a chunk between " -+ "APNG chunks"); -+ png_crc_finish(png_ptr, png_ptr->push_length); -+ png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER; -+ return; -+ } -+ } -+ else -+#endif -+ if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4) -+#ifdef PNG_READ_APNG_SUPPORTED -+ && (png_ptr->num_frames_read == 0) -+#endif -+ ) - { - png_ptr->process_mode = PNG_READ_CHUNK_MODE; - if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)) - 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 && png_ptr->save_buffer_size) - { -@@ -1763,6 +1951,17 @@ - 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; -+} -+#endif -+ - png_voidp PNGAPI - png_get_progressive_ptr(png_structp png_ptr) - { -Index: pngset.c -=================================================================== ---- pngset.c -+++ pngset.c -@@ -266,6 +266,11 @@ - info_ptr->rowbytes = (png_size_t)0; - else - info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); -+ -+#ifdef PNG_APNG_SUPPORTED -+ /* for non-animated png. this may be overritten from an acTL chunk later */ -+ info_ptr->num_frames = 1; -+#endif - } - - #ifdef PNG_oFFs_SUPPORTED -@@ -960,6 +965,142 @@ - } - #endif /* PNG_sPLT_SUPPORTED */ - -+#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 PNGAPI -+png_ensure_fcTL_is_valid(png_structp png_ptr, -+ png_uint_32 width, png_uint_32 height, -+ png_uint_32 x_offset, png_uint_32 y_offset, -+ png_uint_16 delay_num, png_uint_16 delay_den, -+ png_byte dispose_op, png_byte blend_op) -+{ -+ if (width + x_offset > png_ptr->first_frame_width || -+ height + y_offset > png_ptr->first_frame_height) -+ png_error(png_ptr, "dimensions of a frame are greater than" -+ "the ones in IHDR"); -+ if (width > PNG_UINT_31_MAX) -+ png_error(png_ptr, "invalid width in fcTL (> 2^31-1)"); -+ if (height > PNG_UINT_31_MAX) -+ png_error(png_ptr, "invalid height in fcTL (> 2^31-1)"); -+ if (x_offset > PNG_UINT_31_MAX) -+ png_error(png_ptr, "invalid x_offset in fcTL (> 2^31-1)"); -+ if (y_offset > PNG_UINT_31_MAX) -+ png_error(png_ptr, "invalid y_offset in fcTL (> 2^31-1)"); -+ -+ if (dispose_op != PNG_DISPOSE_OP_NONE && -+ dispose_op != PNG_DISPOSE_OP_BACKGROUND && -+ dispose_op != PNG_DISPOSE_OP_PREVIOUS) -+ png_error(png_ptr, "invalid dispose_op in fcTL"); -+ -+ if (blend_op != PNG_BLEND_OP_SOURCE && -+ blend_op != PNG_BLEND_OP_OVER) -+ png_error(png_ptr, "invalid blend_op in fcTL"); -+} -+ -+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; -+ -+ return 1; -+} -+#endif /* PNG_APNG_SUPPORTED */ -+ - #ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED - void PNGAPI - png_set_unknown_chunks(png_structp png_ptr, -Index: pngrutil.c -=================================================================== ---- pngrutil.c -+++ pngrutil.c -@@ -460,6 +460,11 @@ - 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; -@@ -2348,6 +2353,172 @@ - } - #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_error(png_ptr, "fcTL for the first frame must have zero offset"); -+ -+ if (info_ptr != NULL) -+ { -+ if (png_ptr->num_frames_read == 0 && -+ (width != info_ptr->width || height != info_ptr->height)) -+ png_error(png_ptr, "size in first frame's fcTL must match " -+ "the size in IHDR"); -+ -+ /* the set function will do more error checking */ -+ png_set_next_frame_fcTL(png_ptr, info_ptr, width, height, -+ x_offset, y_offset, delay_num, delay_den, -+ dispose_op, blend_op); -+ -+ png_read_reinit(png_ptr, info_ptr); -+ } -+ -+ png_ptr->mode |= PNG_HAVE_fcTL; -+} -+ -+void /* PRIVATE */ -+png_have_info(png_structp png_ptr, png_infop info_ptr) -+{ -+ if((info_ptr->valid & PNG_INFO_acTL) && !(info_ptr->valid & PNG_INFO_fcTL)) -+ { -+ png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN; -+ info_ptr->num_frames++; -+ } -+} -+ -+void /* PRIVATE */ -+png_handle_fdAT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length) -+{ -+ png_ensure_sequence_number(png_ptr, length); -+ -+ /* This function is only called from png_read_end(), png_read_info(), -+ * and png_push_read_chunk() which means that: -+ * - the user doesn't want to read this frame -+ * - or this is an out-of-place fdAT -+ * in either case it is safe to ignore the chunk with a warning */ -+ png_warning(png_ptr, "ignoring fdAT chunk"); -+ png_crc_finish(png_ptr, length - 4); -+} -+ -+void /* PRIVATE */ -+png_ensure_sequence_number(png_structp png_ptr, png_uint_32 length) -+{ -+ png_byte data[4]; -+ png_uint_32 sequence_number; -+ -+ if (length < 4) -+ png_error(png_ptr, "invalid fcTL or fdAT chunk found"); -+ -+ png_crc_read(png_ptr, data, 4); -+ sequence_number = png_get_uint_31(png_ptr, data); -+ -+ if (sequence_number != png_ptr->next_seq_num) -+ png_error(png_ptr, "fcTL or fdAT chunk with out-of-order sequence " -+ "number found"); -+ -+ png_ptr->next_seq_num++; -+} -+#endif /* PNG_READ_APNG_SUPPORTED */ -+ - /* This function is called when we haven't found a handler for a - chunk. If there isn't a problem with the chunk itself (ie bad - chunk name, CRC, or a critical chunk), the chunk is silently ignored -@@ -3379,4 +3550,75 @@ - - 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; -+ png_ptr->flags &= ~PNG_FLAG_ROW_INIT; -+} -+ -+void /* PRIVATE */ -+png_read_reinit(png_structp png_ptr, png_infop info_ptr) -+{ -+ png_ptr->width = info_ptr->next_frame_width; -+ png_ptr->height = info_ptr->next_frame_height; -+ png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->width); -+ if (png_ptr->prev_row) -+ png_memset_check(png_ptr, png_ptr->prev_row, 0, png_ptr->rowbytes + 1); -+} -+ -+/* same as png_read_reset() but for the progressive reader */ -+void /* PRIVATE */ -+png_progressive_read_reset(png_structp png_ptr) -+{ -+#ifdef PNG_USE_LOCAL_ARRAYS -+ /* start of interlace block */ -+ const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; -+ -+ /* offset to next interlace block */ -+ const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; -+ -+ /* start of interlace block in the y direction */ -+ const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; -+ -+ /* offset to next interlace block in the y direction */ -+ const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; -+#endif -+ -+ 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 -+ { -+ png_ptr->num_rows = png_ptr->height; -+ png_ptr->iwidth = png_ptr->width; -+ } -+ png_ptr->flags &= ~PNG_FLAG_ZLIB_FINISHED; -+ if (inflateReset(&(png_ptr->zstream)) != Z_OK) -+ png_error(png_ptr, "inflateReset failed"); -+ png_ptr->zstream.avail_in = 0; -+ png_ptr->zstream.next_in = 0; -+ png_ptr->zstream.next_out = png_ptr->row_buf; -+ png_ptr->zstream.avail_out = (uInt)PNG_ROWBYTES(png_ptr->pixel_depth, -+ png_ptr->iwidth) + 1; -+} -+#endif /* PNG_READ_APNG_SUPPORTED */ - #endif /* PNG_READ_SUPPORTED */ -Index: pngwutil.c -=================================================================== ---- pngwutil.c -+++ pngwutil.c -@@ -516,6 +516,11 @@ - /* Write the chunk */ - png_write_chunk(png_ptr, (png_bytep)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 -+ - /* Initialize zlib with PNG info */ - png_ptr->zstream.zalloc = png_zalloc; - png_ptr->zstream.zfree = png_zfree; -@@ -641,6 +646,9 @@ - { - #ifdef PNG_USE_LOCAL_ARRAYS - PNG_IDAT; -+#ifdef PNG_WRITE_APNG_SUPPORTED -+ PNG_fdAT; -+#endif - #endif - - png_debug(1, "in png_write_IDAT"); -@@ -686,7 +694,28 @@ - "Invalid zlib compression method or flags in IDAT"); - } - -+#ifdef PNG_WRITE_APNG_SUPPORTED -+ if(png_ptr->num_frames_written == 0) -+#endif - png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length); -+#ifdef PNG_WRITE_APNG_SUPPORTED -+ else -+ { -+ png_byte buf[4]; -+ -+ png_write_chunk_start(png_ptr, (png_bytep)png_fdAT, 4 + length); -+ -+ png_save_uint_32(buf, png_ptr->next_seq_num); -+ png_write_chunk_data(png_ptr, buf, 4); -+ -+ png_write_chunk_data(png_ptr, data, length); -+ -+ png_write_chunk_end(png_ptr); -+ -+ png_ptr->next_seq_num++; -+ } -+#endif -+ - png_ptr->mode |= PNG_HAVE_IDAT; - } - -@@ -1754,6 +1783,70 @@ - } - #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) -+{ -+#ifdef PNG_USE_LOCAL_ARRAYS -+ PNG_acTL; -+#endif -+ png_byte data[16]; -+ -+ 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(data, num_frames); -+ png_save_uint_32(data + 4, num_plays); -+ -+ png_write_chunk(png_ptr, (png_bytep)png_acTL, data, (png_size_t)8); -+} -+ -+void /* PRIVATE */ -+png_write_fcTL(png_structp png_ptr, png_uint_32 width, png_uint_32 height, -+ png_uint_32 x_offset, png_uint_32 y_offset, -+ png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, -+ png_byte blend_op) -+{ -+#ifdef PNG_USE_LOCAL_ARRAYS -+ PNG_fcTL; -+#endif -+ png_byte data[26]; -+ -+ png_debug(1, "in png_write_fcTL"); -+ -+ 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(data, png_ptr->next_seq_num); -+ png_save_uint_32(data + 4, width); -+ png_save_uint_32(data + 8, height); -+ png_save_uint_32(data + 12, x_offset); -+ png_save_uint_32(data + 16, y_offset); -+ png_save_uint_16(data + 20, delay_num); -+ png_save_uint_16(data + 22, delay_den); -+ data[24] = dispose_op; -+ data[25] = blend_op; -+ -+ png_write_chunk(png_ptr, (png_bytep)png_fcTL, data, (png_size_t)26); -+ -+ png_ptr->next_seq_num++; -+} -+#endif /* PNG_WRITE_APNG_SUPPORTED */ -+ - /* Initializes the row writing capability of libpng */ - void /* PRIVATE */ - png_write_start_row(png_structp png_ptr) -@@ -2159,8 +2252,8 @@ - #ifndef PNG_WRITE_WEIGHTED_FILTER_SUPPORTED - if (png_ptr->row_number == 0 && filter_to_do == PNG_ALL_FILTERS) - { -- /* These will never be selected so we need not test them. */ -- filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_PAETH); -+ /* These use previous row */ -+ filter_to_do &= ~(PNG_FILTER_UP | PNG_FILTER_AVG | PNG_FILTER_PAETH); - } - #endif - -@@ -2829,4 +2922,39 @@ - } - #endif - } -+ -+#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 - #endif /* PNG_WRITE_SUPPORTED */ -Index: pngrtran.c -=================================================================== ---- pngrtran.c -+++ pngrtran.c -@@ -1352,7 +1352,7 @@ - * pixels. This check added to libpng-1.2.19 - */ - #if (PNG_WARN_UNINITIALIZED_ROW==1) -- png_error(png_ptr, "Uninitialized row"); -+ png_warning(png_ptr, "Uninitialized row"); - #else - png_warning(png_ptr, "Uninitialized row"); - #endif -- cgit v1.2.3-24-g4f1b