Housekeeping

3 files changed, 0 insertions, 3370 deletions

diff --git a/abs/core/libpng/ChangeLog b/abs/core/libpng/ChangeLog
deleted file mode 100644
index 98aa66d..0000000
--- a/abs/core/libpng/ChangeLog
+++ /dev/null
@@ -1,55 +0,0 @@
-
-2008-10-06  Douglas Soares de Andrade  <douglas@archlinux.org>
-
-	* Updated for i686: 1.2.32
-
-2008-08-23  Douglas Soares de Andrade  <douglas@archlinux.org>
-
-	* Updated for i686: 1.2.31
-	* Thanks to Hussam Al-Tayeb
-
-2008-08-17  Douglas Soares de Andrade  <douglas@archlinux.org>
-
-	* Had to return to 1.2.29 because xul depends on 
-	  png with apng patch
-
-2008-08-17  Douglas Soares de Andrade  <douglas@archlinux.org>
-
-	* Updated for i686: 1.2.30
-	* Fixes some security issues
-	* Remove the apng patch as there was no compatible version
-	  for this version
-
-2008-07-04  Douglas Soares de Andrade  <douglas@archlinux.org>
-
-	* Updated for i686 - 1.2.29-1
-	* Updated the apng patch for 1.2.29
-
-2008-05-06 Travis Willard <travis@archlinux.org>
-
-	* 1.2.28-1
-	Upstream update
-	Uses same APNG patchset as 1.2.27
-
-2008-05-01 Jan de Groot <jgc@archlinux.org>
-
-	* 1.2.27-1
-	Upstream update (security update!)
-	Fix APNG patchset to apply to 1.2.27
-	Fix build with newer libtool versions
-
-2008-03-12 Travis Willard <travis@archlinux.org>
-
-	* 1.2.25-1
-	Upstream update
-
-2008-02-18 Travis Willard <travis@archlinux.org>
-
-	* 1.2.24-3
-	Corrected ChangeLog
-
-2008-02-18 Travis Willard <travis@archlinux.org>
-
-	* 1.2.24-2
-	Added ChangeLog
-	Added APNG patchset from <http://littlesvr.ca/apng/>
diff --git a/abs/core/libpng/libpng-1.2.29-apng.patch b/abs/core/libpng/libpng-1.2.29-apng.patch
deleted file mode 100644
index cc27ca3..0000000
--- a/abs/core/libpng/libpng-1.2.29-apng.patch
+++ /dev/null
@@ -1,1671 +0,0 @@
-Submitted By: Jens Ornot <oj_webstar@t-online.de>
-Resubmitted by: Jens Ornot <oj_webstar@t-online.de>  - Fix APNG patchset to apply to 1.2.27
-Date: 2008-05-24
-Initial Package Version: 1.2.10
-Upstream Status: Unknown
-Origin: Andrew Smith
-Description: APNG is an extension of the [PNG][pngspec] format, adding support for animated images.
-             It is intended to be a replacement for simple animated images
-             that have traditionally used the [GIF][gifspec] format,
-             while adding support for 24-bit images and 8-bit transparency.
-             APNG is a simpler alternative to MNG,
-             providing a spec suitable for the most common usage of animated images on the Internet.
-
-             APNG is backwards-compatible with PNG;
-             any PNG decoder should be able to ignore the APNG-specific chunks and display a single image.
-
-diff -ruN libpng-1.2.27/png.c libpng-1.2.27.apng/png.c
---- libpng-1.2.27/png.c	2008-04-30 10:23:12.000000000 +0000
-+++ libpng-1.2.27.apng/png.c	2008-05-01 09:49:58.000000000 +0000
-@@ -51,6 +51,9 @@
- PNG_tIME;
- PNG_tRNS;
- PNG_zTXt;
-+PNG_acTL;
-+PNG_fcTL;
-+PNG_fdAT;
- 
- #ifdef PNG_READ_SUPPORTED
- /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
-diff -ruN libpng-1.2.27/png.h libpng-1.2.27.apng/png.h
---- libpng-1.2.27/png.h	2008-04-30 10:23:11.000000000 +0000
-+++ libpng-1.2.27.apng/png.h	2008-05-01 09:49:58.000000000 +0000
-@@ -958,6 +958,19 @@
-    png_fixed_point int_y_blue;
- #endif
- 
-+#if defined(PNG_APNG_SUPPORTED)
-+   png_uint_32 num_frames; /* including default image */
-+   png_uint_32 num_plays;
-+   png_uint_32 next_frame_width;
-+   png_uint_32 next_frame_height;
-+   png_uint_32 next_frame_x_offset;
-+   png_uint_32 next_frame_y_offset;
-+   png_uint_16 next_frame_delay_num;
-+   png_uint_16 next_frame_delay_den;
-+   png_byte next_frame_dispose_op;
-+   png_byte next_frame_blend_op;
-+#endif
-+
- } png_info;
- 
- typedef png_info FAR * png_infop;
-@@ -1059,6 +1072,8 @@
- #define PNG_INFO_sPLT 0x2000   /* ESR, 1.0.6 */
- #define PNG_INFO_sCAL 0x4000   /* ESR, 1.0.6 */
- #define PNG_INFO_IDAT 0x8000L  /* ESR, 1.0.6 */
-+#define PNG_INFO_acTL 0x10000L
-+#define PNG_INFO_fcTL 0x20000L
- 
- /* This is used for the transformation routines, as some of them
-  * change these values for the row.  It also should enable using
-@@ -1099,6 +1114,10 @@
- typedef void (PNGAPI *png_progressive_end_ptr) PNGARG((png_structp, png_infop));
- typedef void (PNGAPI *png_progressive_row_ptr) PNGARG((png_structp, png_bytep,
-    png_uint_32, int));
-+#if defined(PNG_APNG_SUPPORTED)
-+typedef void (PNGAPI *png_progressive_frame_ptr) PNGARG((png_structp, 
-+   png_uint_32));
-+#endif
- #endif
- 
- #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
-@@ -1430,6 +1449,39 @@
-    png_uint_32 user_height_max;
- #endif
- 
-+#if defined(PNG_APNG_SUPPORTED)
-+   png_uint_32 apng_flags;
-+   png_uint_32 next_seq_num;         /* next fcTL/fdAT chunk sequence number */
-+   png_uint_32 first_frame_width;
-+   png_uint_32 first_frame_height;
-+
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+   png_uint_32 num_frames_read;      /* incremented after all image data of */
-+                                     /* a frame is read */
-+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-+   png_progressive_frame_ptr frame_info_fn; /* frame info read callback */
-+   png_progressive_frame_ptr frame_end_fn;  /* frame data read callback */
-+#endif
-+#endif
-+
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   png_uint_32 num_frames_to_write;
-+   png_uint_32 num_frames_written;
-+#endif
-+#endif
-+
-+/* For png_struct.apng_flags: */
-+#define PNG_FIRST_FRAME_HIDDEN       0x0001
-+
-+/* dispose_op flags from inside fcTL */
-+#define PNG_DISPOSE_OP_NONE        0x00
-+#define PNG_DISPOSE_OP_BACKGROUND  0x01
-+#define PNG_DISPOSE_OP_PREVIOUS    0x02
-+
-+/* blend_op flags from inside fcTL */
-+#define PNG_BLEND_OP_SOURCE        0x00
-+#define PNG_BLEND_OP_OVER          0x01
-+
- /* New member added in libpng-1.0.25 and 1.2.17 */
- #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
-    /* storage for unknown chunk that the library doesn't recognize. */
-@@ -1759,6 +1811,18 @@
- extern PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr,
-    png_bytepp image));
- 
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+extern PNG_EXPORT (void,png_write_frame_head) PNGARG((png_structp png_ptr,
-+   png_infop png_info, png_bytepp row_pointers,
-+   png_uint_32 width, png_uint_32 height,
-+   png_uint_32 x_offset, png_uint_32 y_offset, 
-+   png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
-+   png_byte blend_op));
-+
-+extern PNG_EXPORT (void,png_write_frame_tail) PNGARG((png_structp png_ptr,
-+   png_infop png_info));
-+#endif
-+   
- /* writes the end of the PNG file. */
- extern PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr,
-    png_infop info_ptr));
-@@ -2007,6 +2071,11 @@
-    png_voidp progressive_ptr,
-    png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn,
-    png_progressive_end_ptr end_fn));
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+extern PNG_EXPORT(void,png_set_progressive_frame_fn) PNGARG((png_structp png_ptr,
-+   png_progressive_frame_ptr frame_info_fn,
-+   png_progressive_frame_ptr frame_end_fn));
-+#endif
- 
- /* returns the user pointer associated with the push read functions */
- extern PNG_EXPORT(png_voidp,png_get_progressive_ptr)
-@@ -2444,6 +2513,59 @@
- #endif
- #endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */
- 
-+#if defined(PNG_APNG_SUPPORTED)
-+extern PNG_EXPORT(png_uint_32,png_get_acTL) PNGARG((png_structp png_ptr,
-+   png_infop info_ptr, png_uint_32 *num_frames, png_uint_32 *num_plays));
-+extern PNG_EXPORT(png_uint_32,png_set_acTL) PNGARG((png_structp png_ptr, 
-+   png_infop info_ptr, png_uint_32 num_frames, png_uint_32 num_plays));
-+extern PNG_EXPORT(png_uint_32,png_get_num_frames) PNGARG((png_structp png_ptr,
-+   png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_32,png_get_num_plays) 
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+
-+extern PNG_EXPORT(png_uint_32,png_get_next_frame_fcTL) 
-+   PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 *width, 
-+   png_uint_32 *height, png_uint_32 *x_offset, png_uint_32 *y_offset, 
-+   png_uint_16 *delay_num, png_uint_16 *delay_den, png_byte *dispose_op,
-+   png_byte *blend_op));
-+extern PNG_EXPORT(png_uint_32,png_set_next_frame_fcTL) 
-+   PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 width, 
-+   png_uint_32 height, png_uint_32 x_offset, png_uint_32 y_offset, 
-+   png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
-+   png_byte blend_op));
-+extern PNG_EXPORT(void,png_ensure_fcTL_is_valid)
-+   PNGARG((png_structp png_ptr,
-+   png_uint_32 width, png_uint_32 height,
-+   png_uint_32 x_offset, png_uint_32 y_offset,
-+   png_uint_16 delay_num, png_uint_16 delay_den,
-+   png_byte dispose_op, png_byte blend_op));
-+extern PNG_EXPORT(png_uint_32,png_get_next_frame_width)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_32,png_get_next_frame_height)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_32,png_get_next_frame_x_offset)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_32,png_get_next_frame_y_offset)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_16,png_get_next_frame_delay_num)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_16,png_get_next_frame_delay_den)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_byte,png_get_next_frame_dispose_op)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_byte,png_get_next_frame_blend_op)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_byte,png_get_first_frame_is_hidden)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_32,png_set_first_frame_is_hidden)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr, png_byte is_hidden));
-+#endif /* PNG_APNG_SUPPORTED */
-+
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+extern PNG_EXPORT(void,png_read_frame_head) PNGARG((png_structp png_ptr,
-+   png_infop info_ptr));
-+#endif
-+
- #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
- /* provide a list of chunks and how they are to be handled, if the built-in
-    handling or default unknown chunk handling is not desired.  Any chunks not
-@@ -2750,6 +2872,8 @@
- #define PNG_BACKGROUND_IS_GRAY     0x800
- #define PNG_HAVE_PNG_SIGNATURE    0x1000
- #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */
-+#define PNG_HAVE_acTL             0x4000
-+#define PNG_HAVE_fcTL             0x8000L
- 
- /* flags for the transformations the PNG library does on the image data */
- #define PNG_BGR                0x0001
-@@ -2890,6 +3014,9 @@
- #define PNG_tIME png_byte png_tIME[5] = {116,  73,  77,  69, '\0'}
- #define PNG_tRNS png_byte png_tRNS[5] = {116,  82,  78,  83, '\0'}
- #define PNG_zTXt png_byte png_zTXt[5] = {122,  84,  88, 116, '\0'}
-+#define PNG_acTL png_byte png_acTL[5] = { 97,  99,  84,  76, '\0'}
-+#define PNG_fcTL png_byte png_fcTL[5] = {102,  99,  84,  76, '\0'}
-+#define PNG_fdAT png_byte png_fdAT[5] = {102, 100,  65,  84, '\0'}
- 
- #ifdef PNG_USE_GLOBAL_ARRAYS
- PNG_EXPORT_VAR (png_byte FARDATA) png_IHDR[5];
-@@ -2913,6 +3040,9 @@
- PNG_EXPORT_VAR (png_byte FARDATA) png_tIME[5];
- PNG_EXPORT_VAR (png_byte FARDATA) png_tRNS[5];
- PNG_EXPORT_VAR (png_byte FARDATA) png_zTXt[5];
-+PNG_EXPORT_VAR (png_byte FARDATA) png_acTL[5];
-+PNG_EXPORT_VAR (png_byte FARDATA) png_fcTL[5];
-+PNG_EXPORT_VAR (png_byte FARDATA) png_fdAT[5];
- #endif /* PNG_USE_GLOBAL_ARRAYS */
- 
- #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
-@@ -3187,6 +3317,17 @@
- #endif
- #endif
- 
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+PNG_EXTERN void png_write_acTL PNGARG((png_structp png_ptr,
-+   png_uint_32 num_frames, png_uint_32 num_plays));
-+
-+PNG_EXTERN void png_write_fcTL PNGARG((png_structp png_ptr, 
-+   png_uint_32 width, png_uint_32 height, 
-+   png_uint_32 x_offset, png_uint_32 y_offset, 
-+   png_uint_16 delay_num, png_uint_16 delay_den,
-+   png_byte dispose_op, png_byte blend_op));
-+#endif
-+
- /* Called when finished processing a row of data */
- PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr));
- 
-@@ -3238,6 +3379,20 @@
- PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr,
-    png_infop info_ptr));
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+/* private, reset some things to become ready for reading next frame */
-+PNG_EXTERN void png_read_reset PNGARG((png_structp png_ptr));
-+PNG_EXTERN void png_read_reinit PNGARG((png_structp png_ptr,
-+   png_infop info_ptr));
-+PNG_EXTERN void png_progressive_read_reset PNGARG((png_structp png_ptr));
-+#endif
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+/* private, reset some things to become ready for writing next frame */
-+PNG_EXTERN void png_write_reset PNGARG((png_structp png_ptr));
-+PNG_EXTERN void png_write_reinit PNGARG((png_structp png_ptr, 
-+   png_infop info_ptr, png_uint_32 width, png_uint_32 height));
-+#endif
-+
- /* these are the functions that do the transformations */
- #if defined(PNG_READ_FILLER_SUPPORTED)
- PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info,
-@@ -3453,6 +3608,18 @@
-    png_uint_32 length));
- #endif
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+PNG_EXTERN void png_handle_acTL PNGARG((png_structp png_ptr, png_infop info_ptr,
-+   png_uint_32 length));
-+PNG_EXTERN void png_handle_fcTL PNGARG((png_structp png_ptr, png_infop info_ptr,
-+   png_uint_32 length));
-+PNG_EXTERN void png_have_info PNGARG((png_structp png_ptr, png_infop info_ptr));
-+PNG_EXTERN void png_handle_fdAT PNGARG((png_structp png_ptr, png_infop info_ptr,
-+   png_uint_32 length));
-+PNG_EXTERN void png_ensure_sequence_number PNGARG((png_structp png_ptr, 
-+   png_uint_32 length));
-+#endif
-+
- PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr,
-    png_infop info_ptr, png_uint_32 length));
- 
-diff -ruN libpng-1.2.27/pngconf.h libpng-1.2.27.apng/pngconf.h
---- libpng-1.2.27/pngconf.h	2008-04-30 10:23:11.000000000 +0000
-+++ libpng-1.2.27.apng/pngconf.h	2008-05-01 09:49:58.000000000 +0000
-@@ -925,6 +925,10 @@
- #  define PNG_READ_zTXt_SUPPORTED
- #  define PNG_zTXt_SUPPORTED
- #endif
-+#ifndef PNG_NO_READ_APNG
-+#  define PNG_READ_APNG_SUPPORTED
-+#  define PNG_APNG_SUPPORTED
-+#endif
- #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
- #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
- #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
-@@ -1067,6 +1071,12 @@
- #    define PNG_zTXt_SUPPORTED
- #  endif
- #endif
-+#ifndef PNG_NO_WRITE_APNG
-+#  define PNG_WRITE_APNG_SUPPORTED
-+#  ifndef PNG_APNG_SUPPORTED
-+#    define PNG_APNG_SUPPORTED
-+#  endif
-+#endif
- #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
- #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
- #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
-diff -ruN libpng-1.2.27/pngget.c libpng-1.2.27.apng/pngget.c
---- libpng-1.2.27/pngget.c	2008-04-30 10:23:12.000000000 +0000
-+++ libpng-1.2.27.apng/pngget.c	2008-05-01 09:49:58.000000000 +0000
-@@ -797,6 +797,167 @@
- }
- #endif
- 
-+#if defined(PNG_APNG_SUPPORTED)
-+png_uint_32 PNGAPI
-+png_get_acTL(png_structp png_ptr, png_infop info_ptr,
-+             png_uint_32 *num_frames, png_uint_32 *num_plays)
-+{
-+    png_debug1(1, "in %s retrieval function\n", "acTL");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL &&
-+        (info_ptr->valid & PNG_INFO_acTL) &&
-+        num_frames != NULL && num_plays != NULL)
-+    {
-+        *num_frames = info_ptr->num_frames;
-+        *num_plays = info_ptr->num_plays;
-+        return (1);
-+    }
-+    
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_num_frames(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_num_frames()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->num_frames);
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_num_plays(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_num_plays()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->num_plays);
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr,
-+             png_uint_32 *width, png_uint_32 *height,
-+             png_uint_32 *x_offset, png_uint_32 *y_offset,
-+             png_uint_16 *delay_num, png_uint_16 *delay_den,
-+             png_byte *dispose_op, png_byte *blend_op)
-+{
-+    png_debug1(1, "in %s retrieval function\n", "fcTL");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL &&
-+        (info_ptr->valid & PNG_INFO_fcTL) &&
-+        width != NULL && height != NULL && 
-+        x_offset != NULL && x_offset != NULL && 
-+        delay_num != NULL && delay_den != NULL &&
-+	dispose_op != NULL && blend_op != NULL)
-+    {
-+        *width = info_ptr->next_frame_width;
-+        *height = info_ptr->next_frame_height;
-+        *x_offset = info_ptr->next_frame_x_offset;
-+        *y_offset = info_ptr->next_frame_y_offset;
-+        *delay_num = info_ptr->next_frame_delay_num;
-+        *delay_den = info_ptr->next_frame_delay_den;
-+        *dispose_op = info_ptr->next_frame_dispose_op;
-+        *blend_op = info_ptr->next_frame_blend_op;
-+        return (1);
-+    }
-+    
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_next_frame_width(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_width()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_width);
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_next_frame_height(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_height()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_height);
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_next_frame_x_offset(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_x_offset()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_x_offset);
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_next_frame_y_offset(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_y_offset()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_y_offset);
-+    return (0);
-+}
-+
-+png_uint_16 PNGAPI
-+png_get_next_frame_delay_num(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_delay_num()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_delay_num);
-+    return (0);
-+}
-+
-+png_uint_16 PNGAPI
-+png_get_next_frame_delay_den(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_delay_den()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_delay_den);
-+    return (0);
-+}
-+
-+png_byte PNGAPI
-+png_get_next_frame_dispose_op(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_dispose_op()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_dispose_op);
-+    return (0);
-+}
-+
-+png_byte PNGAPI
-+png_get_next_frame_blend_op(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_blend_op()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_blend_op);
-+    return (0);
-+}
-+
-+png_byte PNGAPI
-+png_get_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_first_frame_is_hidden()\n");
-+    
-+    if (png_ptr != NULL)
-+       return (png_byte)(png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN);
-+    
-+    return 0;
-+}
-+#endif /* PNG_APNG_SUPPORTED */
-+
- #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
- png_uint_32 PNGAPI
- png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
-diff -ruN libpng-1.2.27/pngpread.c libpng-1.2.27.apng/pngpread.c
---- libpng-1.2.27/pngpread.c	2008-04-30 10:23:12.000000000 +0000
-+++ libpng-1.2.27.apng/pngpread.c	2008-05-01 09:49:58.000000000 +0000
-@@ -192,6 +192,11 @@
- #if defined(PNG_READ_zTXt_SUPPORTED)
-       PNG_CONST PNG_zTXt;
- #endif
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      PNG_CONST PNG_acTL;
-+      PNG_CONST PNG_fcTL;
-+      PNG_CONST PNG_fdAT;
-+#endif
- #endif /* PNG_USE_LOCAL_ARRAYS */
-    /* First we make sure we have enough data for the 4 byte chunk name
-     * and the 4 byte chunk length before proceeding with decoding the
-@@ -215,7 +220,104 @@
-       png_crc_read(png_ptr, png_ptr->chunk_name, 4);
-       png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
-    }
--
-+   
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+   if (png_ptr->num_frames_read > 0 && 
-+       png_ptr->num_frames_read < info_ptr->num_frames)
-+   {
-+      if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
-+      {
-+         /* discard trailing IDATs for the first frame */
-+         if (png_ptr->mode & PNG_HAVE_fcTL || png_ptr->num_frames_read > 1)
-+            png_error(png_ptr, "out of place IDAT");
-+         
-+         if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+         {
-+            png_push_save_buffer(png_ptr);
-+            return;
-+         }
-+         png_push_crc_skip(png_ptr, png_ptr->push_length);
-+         png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
-+         return;
-+      }
-+      else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4))
-+      {
-+         if (png_ptr->buffer_size < 4)
-+         {
-+            png_push_save_buffer(png_ptr);
-+            return;
-+         }
-+         png_ensure_sequence_number(png_ptr, 4);
-+         
-+         if (!(png_ptr->mode & PNG_HAVE_fcTL))
-+         {
-+            /* discard trailing fdATs for frames other than the first */
-+            if (png_ptr->num_frames_read < 2)
-+               png_error(png_ptr, "out of place fdAT");
-+            
-+            if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+            {
-+               png_push_save_buffer(png_ptr);
-+               return;
-+            }
-+            png_push_crc_skip(png_ptr, png_ptr->push_length);
-+            png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
-+            return;
-+         }
-+         else
-+         {
-+            /* frame data follows */
-+            png_ptr->idat_size = png_ptr->push_length - 4;
-+            png_ptr->mode |= PNG_HAVE_IDAT;
-+            png_ptr->process_mode = PNG_READ_IDAT_MODE;
-+            
-+            return;
-+         }
-+      }
-+      else if(!png_memcmp(png_ptr->chunk_name, png_fcTL, 4))
-+      {
-+         if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+         {
-+            png_push_save_buffer(png_ptr);
-+            return;
-+         }
-+         
-+         png_read_reset(png_ptr);
-+         png_ptr->mode &= ~PNG_HAVE_fcTL;
-+         
-+         png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length);
-+         
-+         if (!(png_ptr->mode & PNG_HAVE_fcTL))
-+            png_error(png_ptr, "missing required fcTL chunk");
-+         
-+         png_read_reinit(png_ptr, info_ptr);
-+         png_progressive_read_reset(png_ptr);
-+         
-+         if (png_ptr->frame_info_fn != NULL)
-+            (*(png_ptr->frame_info_fn))(png_ptr, png_ptr->num_frames_read);
-+         
-+         png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
-+         
-+         return;
-+      }
-+      else
-+      {
-+         if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+         {
-+            png_push_save_buffer(png_ptr);
-+            return;
-+         }
-+         png_warning(png_ptr, "Skipped (ignored) a chunk "
-+                              "between APNG chunks");
-+         png_push_crc_skip(png_ptr, png_ptr->push_length);
-+         png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
-+         return;
-+      }
-+      
-+      return;
-+   }
-+#endif /* PNG_READ_APNG_SUPPORTED */
-+   
-    if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
-      if(png_ptr->mode & PNG_AFTER_IDAT)
-         png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
-@@ -297,6 +399,9 @@
-             png_error(png_ptr, "Too many IDAT's found");
-       }
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      png_have_info(png_ptr, info_ptr);
-+#endif
-       png_ptr->idat_size = png_ptr->push_length;
-       png_ptr->mode |= PNG_HAVE_IDAT;
-       png_ptr->process_mode = PNG_READ_IDAT_MODE;
-@@ -492,6 +597,35 @@
-       png_push_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length);
-    }
- #endif
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+   else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4))
-+   {
-+      if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+      {
-+         png_push_save_buffer(png_ptr);
-+         return;
-+      }
-+      png_handle_acTL(png_ptr, info_ptr, png_ptr->push_length);
-+   }
-+   else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4))
-+   {
-+      if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+      {
-+         png_push_save_buffer(png_ptr);
-+         return;
-+      }
-+      png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length);
-+   }
-+   else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4))
-+   {
-+      if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+      {
-+         png_push_save_buffer(png_ptr);
-+         return;
-+      }
-+      png_handle_fdAT(png_ptr, info_ptr, png_ptr->push_length);
-+   }
-+#endif /* PNG_READ_APNG_SUPPORTED */
-    else
-    {
-       if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-@@ -662,13 +796,17 @@
- png_push_read_IDAT(png_structp png_ptr)
- {
- #ifdef PNG_USE_LOCAL_ARRAYS
--   PNG_CONST PNG_IDAT;
-+   PNG_IDAT;
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+   PNG_fdAT;
-+   PNG_IEND;
-+#endif
- #endif
-    if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
-    {
-       png_byte chunk_length[4];
- 
--      if (png_ptr->buffer_size < 8)
-+      if (png_ptr->buffer_size < 12)
-       {
-          png_push_save_buffer(png_ptr);
-          return;
-@@ -680,15 +818,59 @@
-       png_crc_read(png_ptr, png_ptr->chunk_name, 4);
-       png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
- 
--      if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_fdAT, 4)
-+          && png_ptr->num_frames_read > 0)
-+      {
-+          if (png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)
-+          {
-+              png_ptr->process_mode = PNG_READ_CHUNK_MODE;
-+              if (png_ptr->frame_end_fn != NULL)
-+                 (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read);
-+              png_ptr->num_frames_read++;
-+              return;
-+          }
-+          else
-+          {
-+              if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
-+                  png_error(png_ptr, "Not enough image data");
-+              if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+              {
-+                 png_push_save_buffer(png_ptr);
-+                 return;
-+              }
-+              png_warning(png_ptr, "Skipping (ignoring) a chunk between "
-+                                   "APNG chunks");
-+              png_crc_finish(png_ptr, png_ptr->push_length);
-+              png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
-+              return;
-+          }
-+      }
-+      else 
-+#endif
-+      if ( png_memcmp(png_ptr->chunk_name, png_IDAT, 4)
-+                && (png_ptr->num_frames_read == 0) )
-       {
-          png_ptr->process_mode = PNG_READ_CHUNK_MODE;
-          if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
-             png_error(png_ptr, "Not enough compressed data");
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+         if (png_ptr->frame_end_fn != NULL)
-+            (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read);
-+         png_ptr->num_frames_read++;
-+#endif
-          return;
-       }
- 
-       png_ptr->idat_size = png_ptr->push_length;
-+      
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      if(png_ptr->num_frames_read > 0)
-+      {
-+         png_ensure_sequence_number(png_ptr, 4);
-+         png_ptr->idat_size -= 4;
-+      }
-+#endif
-    }
-    if (png_ptr->idat_size && png_ptr->save_buffer_size)
-    {
-@@ -1589,6 +1771,17 @@
-    png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer);
- }
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+void PNGAPI
-+png_set_progressive_frame_fn(png_structp png_ptr,
-+   png_progressive_frame_ptr frame_info_fn,
-+   png_progressive_frame_ptr frame_end_fn)
-+{
-+   png_ptr->frame_info_fn = frame_info_fn;
-+   png_ptr->frame_end_fn = frame_end_fn;
-+}
-+#endif
-+
- png_voidp PNGAPI
- png_get_progressive_ptr(png_structp png_ptr)
- {
-diff -ruN libpng-1.2.27/pngread.c libpng-1.2.27.apng/pngread.c
---- libpng-1.2.27/pngread.c	2008-04-30 10:23:12.000000000 +0000
-+++ libpng-1.2.27.apng/pngread.c	2008-05-01 09:49:58.000000000 +0000
-@@ -405,6 +405,11 @@
- #if defined(PNG_READ_zTXt_SUPPORTED)
-       PNG_CONST PNG_zTXt;
- #endif
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      PNG_CONST PNG_acTL;
-+      PNG_CONST PNG_fcTL;
-+      PNG_CONST PNG_fdAT;
-+#endif
- #endif /* PNG_USE_LOCAL_ARRAYS */
-       png_byte chunk_length[4];
-       png_uint_32 length;
-@@ -458,6 +463,9 @@
-                   !(png_ptr->mode & PNG_HAVE_PLTE))
-             png_error(png_ptr, "Missing PLTE before IDAT");
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+         png_have_info(png_ptr, info_ptr);
-+#endif
-          png_ptr->idat_size = length;
-          png_ptr->mode |= PNG_HAVE_IDAT;
-          break;
-@@ -530,12 +538,97 @@
-       else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
-          png_handle_iTXt(png_ptr, info_ptr, length);
- #endif
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4))
-+         png_handle_acTL(png_ptr, info_ptr, length);
-+      else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4))
-+         png_handle_fcTL(png_ptr, info_ptr, length);
-+      else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4))
-+         png_handle_fdAT(png_ptr, info_ptr, length);
-+#endif
-       else
-          png_handle_unknown(png_ptr, info_ptr, length);
-    }
- }
- #endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+void PNGAPI
-+png_read_frame_head(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_byte have_chunk_after_DAT; /* after IDAT or after fdAT */
-+    
-+    png_debug(0, "Reading frame head\n");
-+    
-+    if (!(png_ptr->mode & PNG_HAVE_acTL))
-+        png_error(png_ptr, "attempt to png_read_frame_head() but "
-+                           "no acTL present");
-+    
-+    /* do nothing for the main IDAT */
-+    if (png_ptr->num_frames_read == 0)
-+        return;
-+    
-+    png_crc_finish(png_ptr, 0); /* CRC from last IDAT or fdAT chunk */
-+    
-+    png_read_reset(png_ptr);
-+    png_ptr->mode &= ~PNG_HAVE_fcTL;
-+    
-+    have_chunk_after_DAT = 0;
-+    for (;;)
-+    {
-+#ifdef PNG_USE_LOCAL_ARRAYS
-+        PNG_IDAT;
-+        PNG_fdAT;
-+        PNG_fcTL;
-+#endif
-+        png_byte chunk_length[4];
-+        png_uint_32 length;
-+        
-+        png_read_data(png_ptr, chunk_length, 4);
-+        length = png_get_uint_31(png_ptr, chunk_length);
-+        
-+        png_reset_crc(png_ptr);
-+        png_crc_read(png_ptr, png_ptr->chunk_name, 4);
-+        
-+        if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
-+        {
-+            /* discard trailing IDATs for the first frame */
-+            if (have_chunk_after_DAT || png_ptr->num_frames_read > 1)
-+                png_error(png_ptr, "png_read_frame_head(): out of place IDAT");
-+            png_crc_finish(png_ptr, length);
-+        }
-+        else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4))
-+        {
-+            png_handle_fcTL(png_ptr, info_ptr, length);
-+            have_chunk_after_DAT = 1;
-+        }
-+        else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4))
-+        {
-+            png_ensure_sequence_number(png_ptr, length);
-+            
-+            /* discard trailing fdATs for frames other than the first */
-+            if (!have_chunk_after_DAT && png_ptr->num_frames_read > 1)
-+                png_crc_finish(png_ptr, length - 4);
-+            else if(png_ptr->mode & PNG_HAVE_fcTL)
-+            {
-+                png_ptr->idat_size = length - 4;
-+                png_ptr->mode |= PNG_HAVE_IDAT;
-+                
-+                break;
-+            }
-+            else
-+                png_error(png_ptr, "png_read_frame_head(): out of place fdAT");
-+        }
-+        else
-+        {
-+            png_warning(png_ptr, "Skipped (ignored) a chunk "
-+                                 "between APNG chunks");
-+            png_crc_finish(png_ptr, length);
-+        }
-+    }
-+}
-+#endif /* PNG_READ_APNG_SUPPORTED */
-+
- /* optional call to update the users info_ptr structure */
- void PNGAPI
- png_read_update_info(png_structp png_ptr, png_infop info_ptr)
-@@ -572,6 +665,10 @@
- {
- #ifdef PNG_USE_LOCAL_ARRAYS
-    PNG_CONST PNG_IDAT;
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+   PNG_CONST PNG_fdAT;
-+   PNG_CONST PNG_IEND;
-+#endif
-    PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55,
-      0xff};
-    PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
-@@ -701,19 +798,46 @@
-    {
-       if (!(png_ptr->zstream.avail_in))
-       {
--         while (!png_ptr->idat_size)
-+         png_uint_32 bytes_to_skip = 0;
-+         
-+         while (!png_ptr->idat_size || bytes_to_skip != 0)
-          {
-             png_byte chunk_length[4];
- 
--            png_crc_finish(png_ptr, 0);
--
-+            png_crc_finish(png_ptr, bytes_to_skip);
-+            bytes_to_skip = 0;
-+            
-             png_read_data(png_ptr, chunk_length, 4);
-             png_ptr->idat_size = png_get_uint_31(png_ptr,chunk_length);
--
-+            
-             png_reset_crc(png_ptr);
-             png_crc_read(png_ptr, png_ptr->chunk_name, 4);
--            if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
--               png_error(png_ptr, "Not enough image data");
-+            
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+            if (png_ptr->num_frames_read == 0)
-+            {
-+#endif
-+               if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
-+                  png_error(png_ptr, "Not enough image data");
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+            }
-+            else
-+            {
-+               if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
-+                  png_error(png_ptr, "Not enough image data");
-+               if (png_memcmp(png_ptr->chunk_name, png_fdAT, 4))
-+               {
-+                  png_warning(png_ptr, "Skipped (ignored) a chunk "
-+                                       "between APNG chunks");
-+                  bytes_to_skip = png_ptr->idat_size;
-+                  continue;
-+               }
-+               
-+               png_ensure_sequence_number(png_ptr, png_ptr->idat_size);
-+               
-+               png_ptr->idat_size -= 4;
-+            }
-+#endif
-          }
-          png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size;
-          png_ptr->zstream.next_in = png_ptr->zbuf;
-@@ -731,6 +855,9 @@
-             png_error(png_ptr, "Extra compressed data");
-          png_ptr->mode |= PNG_AFTER_IDAT;
-          png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+         png_ptr->num_frames_read++;
-+#endif
-          break;
-       }
-       if (ret != Z_OK)
-@@ -985,6 +1112,11 @@
- #if defined(PNG_READ_zTXt_SUPPORTED)
-       PNG_CONST PNG_zTXt;
- #endif
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      PNG_CONST PNG_acTL;
-+      PNG_CONST PNG_fcTL;
-+      PNG_CONST PNG_fdAT;
-+#endif
- #endif /* PNG_USE_LOCAL_ARRAYS */
- 
-       png_read_data(png_ptr, chunk_length, 4);
-@@ -1091,6 +1223,14 @@
-       else if (!png_memcmp(png_ptr->chunk_name, png_iTXt, 4))
-          png_handle_iTXt(png_ptr, info_ptr, length);
- #endif
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4))
-+         png_handle_acTL(png_ptr, info_ptr, length);
-+      else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4))
-+         png_handle_fcTL(png_ptr, info_ptr, length);
-+      else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4))
-+         png_handle_fdAT(png_ptr, info_ptr, length);
-+#endif
-       else
-          png_handle_unknown(png_ptr, info_ptr, length);
-    } while (!(png_ptr->mode & PNG_HAVE_IEND));
-diff -ruN libpng-1.2.27/pngrtran.c libpng-1.2.27.apng/pngrtran.c
---- libpng-1.2.27/pngrtran.c	2008-04-30 10:23:13.000000000 +0000
-+++ libpng-1.2.27.apng/pngrtran.c	2008-05-01 09:49:58.000000000 +0000
-@@ -1286,7 +1286,7 @@
-        * or png_read_update_info() after setting transforms that expand
-        * pixels.  This check added to libpng-1.2.19 */
- #if (PNG_WARN_UNINITIALIZED_ROW==1)
--      png_error(png_ptr, "Uninitialized row");
-+      png_warning(png_ptr, "Uninitialized row");
- #else
-       png_warning(png_ptr, "Uninitialized row");
- #endif
-diff -ruN libpng-1.2.27/pngrutil.c libpng-1.2.27.apng/pngrutil.c
---- libpng-1.2.27/pngrutil.c	2008-04-30 10:23:13.000000000 +0000
-+++ libpng-1.2.27.apng/pngrutil.c	2008-05-01 09:49:58.000000000 +0000
-@@ -374,6 +374,11 @@
-    filter_type = buf[11];
-    interlace_type = buf[12];
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+   png_ptr->first_frame_width = width;
-+   png_ptr->first_frame_height = height;
-+#endif
-+
-    /* set internal variables */
-    png_ptr->width = width;
-    png_ptr->height = height;
-@@ -2169,6 +2174,168 @@
- }
- #endif
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+void /* PRIVATE */
-+png_handle_acTL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-+{
-+    png_byte data[8];
-+    png_uint_32 num_frames;
-+    png_uint_32 num_plays;
-+    png_uint_32 didSet;
-+    
-+    png_debug(1, "in png_handle_acTL\n");
-+
-+    if (!(png_ptr->mode & PNG_HAVE_IHDR))
-+    {
-+        png_error(png_ptr, "Missing IHDR before acTL");
-+    }
-+    else if (png_ptr->mode & PNG_HAVE_IDAT)
-+    {
-+        png_warning(png_ptr, "Invalid acTL after IDAT skipped");
-+        png_crc_finish(png_ptr, length);
-+        return;
-+    }
-+    else if (png_ptr->mode & PNG_HAVE_acTL)
-+    {
-+        png_warning(png_ptr, "Duplicate acTL skipped");
-+        png_crc_finish(png_ptr, length);
-+        return;
-+    }
-+    else if (length != 8)
-+    {
-+        png_warning(png_ptr, "acTL with invalid length skipped");
-+        png_crc_finish(png_ptr, length);
-+        return;
-+    }
-+    
-+    png_crc_read(png_ptr, data, 8);
-+    png_crc_finish(png_ptr, 0);
-+    
-+    num_frames = png_get_uint_31(png_ptr, data);
-+    num_plays = png_get_uint_31(png_ptr, data + 4);
-+    
-+    /* the set function will do error checking on num_frames */
-+    didSet = png_set_acTL(png_ptr, info_ptr, num_frames, num_plays);
-+    if(didSet)
-+        png_ptr->mode |= PNG_HAVE_acTL;
-+}
-+
-+void /* PRIVATE */
-+png_handle_fcTL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-+{
-+    png_byte data[22];
-+    png_uint_32 width;
-+    png_uint_32 height;
-+    png_uint_32 x_offset;
-+    png_uint_32 y_offset;
-+    png_uint_16 delay_num;
-+    png_uint_16 delay_den;
-+    png_byte dispose_op;
-+    png_byte blend_op;
-+    
-+    png_debug(1, "in png_handle_fcTL\n");
-+    
-+    if (!(png_ptr->mode & PNG_HAVE_IHDR))
-+    {
-+        png_error(png_ptr, "Missing IHDR before fcTL");
-+    }
-+    else if (png_ptr->mode & PNG_HAVE_IDAT)
-+    {
-+        /* for any frames other then the first this message may be misleading,
-+        * but correct. PNG_HAVE_IDAT is unset before the frame head is read
-+        * i can't think of a better message */
-+        png_warning(png_ptr, "Invalid fcTL after IDAT skipped");
-+        png_crc_finish(png_ptr, length);
-+        return;
-+    }
-+    else if (png_ptr->mode & PNG_HAVE_fcTL)
-+    {
-+        png_warning(png_ptr, "Duplicate fcTL within one frame skipped");
-+        png_crc_finish(png_ptr, length);
-+        return;
-+    }
-+    else if (length != 26)
-+    {
-+        png_warning(png_ptr, "fcTL with invalid length skipped");
-+        png_crc_finish(png_ptr, length);
-+        return;
-+    }
-+    
-+    png_ensure_sequence_number(png_ptr, length);
-+    
-+    png_crc_read(png_ptr, data, 22);
-+    png_crc_finish(png_ptr, 0);
-+    
-+    width = png_get_uint_31(png_ptr, data);
-+    height = png_get_uint_31(png_ptr, data + 4);
-+    x_offset = png_get_uint_31(png_ptr, data + 8);
-+    y_offset = png_get_uint_31(png_ptr, data + 12);
-+    delay_num = png_get_uint_16(data + 16);
-+    delay_den = png_get_uint_16(data + 18);
-+    dispose_op = data[20];
-+    blend_op = data[21];
-+    
-+    if (png_ptr->num_frames_read == 0 && (x_offset != 0 || y_offset != 0))
-+        png_error(png_ptr, "fcTL for the first frame must have zero offset");
-+    if (png_ptr->num_frames_read == 0 && 
-+        (width != info_ptr->width || height != info_ptr->height))
-+        png_error(png_ptr, "size in first frame's fcTL must match "
-+                           "the size in IHDR");
-+    
-+    /* the set function will do more error checking */
-+    png_set_next_frame_fcTL(png_ptr, info_ptr, width, height, 
-+                            x_offset, y_offset, delay_num, delay_den,
-+                            dispose_op, blend_op);
-+    
-+    png_read_reinit(png_ptr, info_ptr);
-+    
-+    png_ptr->mode |= PNG_HAVE_fcTL;
-+}
-+
-+void /* PRIVATE */
-+png_have_info(png_structp png_ptr, png_infop info_ptr)
-+{
-+    if((info_ptr->valid & PNG_INFO_acTL) && !(info_ptr->valid & PNG_INFO_fcTL))
-+    {
-+        png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN;
-+        info_ptr->num_frames++;
-+    }
-+}
-+
-+void /* PRIVATE */
-+png_handle_fdAT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-+{
-+    png_ensure_sequence_number(png_ptr, length);
-+    
-+    /* This function is only called from png_read_end(), png_read_info(), 
-+    * and png_push_read_chunk() which means that:
-+    * - the user doesn't want to read this frame
-+    * - or this is an out-of-place fdAT
-+    * in either case it is safe to ignore the chunk with a warning */
-+    png_warning(png_ptr, "ignoring fdAT chunk");
-+    png_crc_finish(png_ptr, length - 4);
-+}
-+
-+void /* PRIVATE */
-+png_ensure_sequence_number(png_structp png_ptr, png_uint_32 length)
-+{
-+    png_byte data[4];
-+    png_uint_32 sequence_number;
-+    
-+    if (length < 4)
-+        png_error(png_ptr, "invalid fcTL or fdAT chunk found");
-+    
-+    png_crc_read(png_ptr, data, 4);
-+    sequence_number = png_get_uint_31(png_ptr, data);
-+    
-+    if (sequence_number != png_ptr->next_seq_num)
-+        png_error(png_ptr, "fcTL or fdAT chunk with out-of-order sequence "
-+                           "number found");
-+    
-+    png_ptr->next_seq_num++;
-+}
-+#endif /* PNG_READ_APNG_SUPPORTED */
-+
- /* This function is called when we haven't found a handler for a
-    chunk.  If there isn't a problem with the chunk itself (ie bad
-    chunk name, CRC, or a critical chunk), the chunk is silently ignored
-@@ -3180,4 +3347,82 @@
- 
-    png_ptr->flags |= PNG_FLAG_ROW_INIT;
- }
-+
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+/* This function is to be called after the main IDAT set has been read and
-+ * before a new IDAT is read. It resets some parts of png_ptr
-+ * to make them usable by the read functions again */
-+void /* PRIVATE */
-+png_read_reset(png_structp png_ptr)
-+{
-+    png_ptr->mode &= ~PNG_HAVE_IDAT;
-+    png_ptr->mode &= ~PNG_AFTER_IDAT;
-+    png_ptr->row_number = 0;
-+    png_ptr->pass = 0;
-+    png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
-+}
-+
-+void /* PRIVATE */
-+png_read_reinit(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_ptr->width = info_ptr->next_frame_width;
-+    png_ptr->height = info_ptr->next_frame_height;
-+    png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->width);
-+}
-+
-+/* same as png_read_reset() but for the progressive reader */
-+void /* PRIVATE */
-+png_progressive_read_reset(png_structp png_ptr)
-+{
-+#ifdef PNG_USE_LOCAL_ARRAYS
-+    /* start of interlace block */
-+    const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
-+
-+    /* offset to next interlace block */
-+    const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
-+
-+    /* start of interlace block in the y direction */
-+    const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
-+
-+    /* offset to next interlace block in the y direction */
-+    const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
-+#endif
-+    png_uint_32 row_bytes;
-+    
-+    if (png_ptr->interlaced)
-+    {
-+        if (!(png_ptr->transformations & PNG_INTERLACE))
-+            png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
-+                                png_pass_ystart[0]) / png_pass_yinc[0];
-+        else
-+           png_ptr->num_rows = png_ptr->height;
-+
-+        png_ptr->iwidth = (png_ptr->width +
-+                           png_pass_inc[png_ptr->pass] - 1 -
-+                           png_pass_start[png_ptr->pass]) /
-+                           png_pass_inc[png_ptr->pass];
-+
-+        row_bytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->iwidth) + 1;
-+
-+        png_ptr->irowbytes = (png_size_t)row_bytes;
-+        if((png_uint_32)png_ptr->irowbytes != row_bytes)
-+            png_error(png_ptr, "png_progressive_read_reset(): Rowbytes "
-+                               "overflow");
-+    }
-+    else
-+    {
-+        png_ptr->num_rows = png_ptr->height;
-+        png_ptr->iwidth = png_ptr->width;
-+        png_ptr->irowbytes = png_ptr->rowbytes + 1;
-+    }
-+    
-+    png_ptr->flags &= ~PNG_FLAG_ZLIB_FINISHED;
-+    if (inflateReset(&(png_ptr->zstream)) != Z_OK)
-+        png_error(png_ptr, "inflateReset failed");
-+    png_ptr->zstream.avail_in = 0;
-+    png_ptr->zstream.next_in = 0;
-+    png_ptr->zstream.next_out = png_ptr->row_buf;
-+    png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes;
-+}
-+#endif /* PNG_READ_APNG_SUPPORTED */
- #endif /* PNG_READ_SUPPORTED */
-diff -ruN libpng-1.2.27/pngset.c libpng-1.2.27.apng/pngset.c
---- libpng-1.2.27/pngset.c	2008-04-30 10:23:13.000000000 +0000
-+++ libpng-1.2.27.apng/pngset.c	2008-05-01 09:49:58.000000000 +0000
-@@ -364,6 +364,11 @@
-       info_ptr->rowbytes = (png_size_t)0;
-    else
-       info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth,width);
-+   
-+#if defined(PNG_APNG_SUPPORTED)
-+   /* for non-animated png. this may be overritten from an acTL chunk later */
-+   info_ptr->num_frames = 1;
-+#endif
- }
- 
- #if defined(PNG_oFFs_SUPPORTED)
-@@ -1025,6 +1030,141 @@
- }
- #endif /* PNG_sPLT_SUPPORTED */
- 
-+#if defined(PNG_APNG_SUPPORTED)
-+png_uint_32 PNGAPI
-+png_set_acTL(png_structp png_ptr, png_infop info_ptr, 
-+    png_uint_32 num_frames, png_uint_32 num_plays)
-+{
-+    png_debug1(1, "in %s storage function\n", "acTL");
-+
-+    if (png_ptr == NULL || info_ptr == NULL)
-+    {
-+        png_warning(png_ptr, 
-+                    "Call to png_set_acTL() with NULL png_ptr "
-+                    "or info_ptr ignored");
-+        return (0);
-+    }
-+    if (num_frames == 0)
-+    {
-+        png_warning(png_ptr, 
-+                    "Ignoring attempt to set acTL with num_frames zero");
-+        return (0);
-+    }
-+    if (num_frames > PNG_UINT_31_MAX)
-+    {
-+        png_warning(png_ptr, 
-+                    "Ignoring attempt to set acTL with num_frames > 2^31-1");
-+        return (0);
-+    }
-+    if (num_plays > PNG_UINT_31_MAX)
-+    {
-+        png_warning(png_ptr, 
-+                    "Ignoring attempt to set acTL with num_plays "
-+                    "> 2^31-1");
-+        return (0);
-+    }
-+    
-+    info_ptr->num_frames = num_frames;
-+    info_ptr->num_plays = num_plays;
-+    
-+    info_ptr->valid |= PNG_INFO_acTL;
-+    
-+    return (1);
-+}
-+
-+/* delay_num and delay_den can hold any 16-bit values including zero */
-+png_uint_32 PNGAPI
-+png_set_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr, 
-+    png_uint_32 width, png_uint_32 height,
-+    png_uint_32 x_offset, png_uint_32 y_offset,
-+    png_uint_16 delay_num, png_uint_16 delay_den,
-+    png_byte dispose_op, png_byte blend_op)
-+{
-+    png_debug1(1, "in %s storage function\n", "fcTL");
-+
-+    if (png_ptr == NULL || info_ptr == NULL)
-+    {
-+        png_warning(png_ptr, 
-+                    "Call to png_set_fcTL() with NULL png_ptr or info_ptr "
-+                    "ignored");
-+        return (0);
-+    }
-+    
-+    png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset, 
-+                             delay_num, delay_den, dispose_op, blend_op);
-+    
-+    info_ptr->next_frame_width = width;
-+    info_ptr->next_frame_height = height;
-+    info_ptr->next_frame_x_offset = x_offset;
-+    info_ptr->next_frame_y_offset = y_offset;
-+    info_ptr->next_frame_delay_num = delay_num;
-+    info_ptr->next_frame_delay_den = delay_den;
-+    info_ptr->next_frame_dispose_op = dispose_op;
-+    info_ptr->next_frame_blend_op = blend_op;
-+    
-+    info_ptr->valid |= PNG_INFO_fcTL;
-+    
-+    return (1);
-+}
-+
-+void /* PRIVATE */
-+png_ensure_fcTL_is_valid(png_structp png_ptr, 
-+    png_uint_32 width, png_uint_32 height,
-+    png_uint_32 x_offset, png_uint_32 y_offset,
-+    png_uint_16 delay_num, png_uint_16 delay_den,
-+    png_byte dispose_op, png_byte blend_op)
-+{
-+    if (width + x_offset > png_ptr->first_frame_width || 
-+        height + y_offset > png_ptr->first_frame_height)
-+        png_error(png_ptr, "dimensions of a frame are greater than"
-+                           "the ones in IHDR");
-+    if (width > PNG_UINT_31_MAX)
-+        png_error(png_ptr, "invalid width in fcTL (> 2^31-1)");
-+    if (height > PNG_UINT_31_MAX)
-+        png_error(png_ptr, "invalid height in fcTL (> 2^31-1)");
-+    if (x_offset > PNG_UINT_31_MAX)
-+        png_error(png_ptr, "invalid x_offset in fcTL (> 2^31-1)");
-+    if (y_offset > PNG_UINT_31_MAX)
-+        png_error(png_ptr, "invalid y_offset in fcTL (> 2^31-1)");
-+
-+    if (dispose_op != PNG_DISPOSE_OP_NONE &&
-+	dispose_op != PNG_DISPOSE_OP_BACKGROUND &&
-+	dispose_op != PNG_DISPOSE_OP_PREVIOUS)
-+        png_error(png_ptr, "invalid dispose_op in fcTL");
-+
-+    if (blend_op != PNG_BLEND_OP_SOURCE &&
-+	blend_op != PNG_BLEND_OP_OVER)
-+        png_error(png_ptr, "invalid blend_op in fcTL");
-+
-+    if (blend_op == PNG_BLEND_OP_OVER) {
-+        if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY)
-+            png_error(png_ptr, "PNG_BLEND_OP_OVER is not valid for "
-+                               "color type 'greyscale without alpha'");
-+        else if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) &&
-+		 !(png_ptr->color_type & PNG_COLOR_MASK_ALPHA))
-+            png_error(png_ptr, "PNG_BLEND_OP_OVER is not valid for "
-+                               "color type 'truecolor without alpha'");
-+    }
-+}
-+
-+png_uint_32 PNGAPI
-+png_set_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr,
-+                              png_byte is_hidden)
-+{
-+    png_debug(1, "in png_first_frame_is_hidden()\n");
-+    
-+    if (png_ptr == NULL)
-+        return 0;
-+    
-+    if(is_hidden)
-+        png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN;
-+    else
-+        png_ptr->apng_flags &= ~PNG_FIRST_FRAME_HIDDEN;
-+    
-+    return 1;
-+}
-+#endif /* PNG_APNG_SUPPORTED */
-+
- #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
- void PNGAPI
- png_set_unknown_chunks(png_structp png_ptr,
-diff -ruN libpng-1.2.27/pngtrans.c libpng-1.2.27.apng/pngtrans.c
---- libpng-1.2.27/pngtrans.c	2008-04-30 10:23:14.000000000 +0000
-+++ libpng-1.2.27.apng/pngtrans.c	2008-05-01 09:49:58.000000000 +0000
-@@ -652,11 +652,10 @@
- png_voidp PNGAPI
- png_get_user_transform_ptr(png_structp png_ptr)
- {
--#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
-    if (png_ptr == NULL) return (NULL);
-+#if defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
-    return ((png_voidp)png_ptr->user_transform_ptr);
--#else
--   return (NULL);
- #endif
-+   return (NULL);
- }
- #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */
-diff -ruN libpng-1.2.27/pngwrite.c libpng-1.2.27.apng/pngwrite.c
---- libpng-1.2.27/pngwrite.c	2008-04-30 10:23:14.000000000 +0000
-+++ libpng-1.2.27.apng/pngwrite.c	2008-05-01 09:49:58.000000000 +0000
-@@ -263,6 +263,10 @@
-       }
-    }
- #endif
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   if (info_ptr->valid & PNG_INFO_acTL)
-+      png_write_acTL(png_ptr, info_ptr->num_frames, info_ptr->num_plays);
-+#endif
- #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
-    if (info_ptr->unknown_chunks_num)
-    {
-@@ -301,6 +305,10 @@
-       return;
-    if (!(png_ptr->mode & PNG_HAVE_IDAT))
-       png_error(png_ptr, "No IDATs written into file");
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   if (png_ptr->num_frames_written != png_ptr->num_frames_to_write)
-+      png_error(png_ptr, "Not enough frames written");
-+#endif
- 
-    /* see if user wants us to write information chunks */
-    if (info_ptr != NULL)
-@@ -1529,4 +1537,39 @@
-    params = params;
- }
- #endif
-+
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+void PNGAPI
-+png_write_frame_head(png_structp png_ptr, png_infop info_ptr,
-+    png_bytepp row_pointers, png_uint_32 width, png_uint_32 height, 
-+    png_uint_32 x_offset, png_uint_32 y_offset, 
-+    png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
-+    png_byte blend_op)
-+{
-+    png_debug(1, "in png_write_frame_head\n");
-+    
-+    /* there is a chance this has been set after png_write_info was called,
-+    * so it would be set but not written. is there a way to be sure? */
-+    if (!(info_ptr->valid & PNG_INFO_acTL))
-+        png_error(png_ptr, "png_write_frame_head(): acTL not set");
-+    
-+    png_write_reset(png_ptr);
-+    
-+    png_write_reinit(png_ptr, info_ptr, width, height);
-+    
-+    if ( !(png_ptr->num_frames_written == 0 && 
-+           (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN) ) )
-+        png_write_fcTL(png_ptr, width, height, x_offset, y_offset, 
-+                       delay_num, delay_den, dispose_op, blend_op);
-+}
-+
-+void PNGAPI
-+png_write_frame_tail(png_structp png_ptr, png_infop png_info)
-+{
-+    png_debug(1, "in png_write_frame_tail\n");
-+    
-+    png_ptr->num_frames_written++;
-+}
-+#endif /* PNG_WRITE_APNG_SUPPORTED */
-+
- #endif /* PNG_WRITE_SUPPORTED */
-diff -ruN libpng-1.2.27/pngwutil.c libpng-1.2.27.apng/pngwutil.c
---- libpng-1.2.27/pngwutil.c	2008-04-30 10:23:14.000000000 +0000
-+++ libpng-1.2.27.apng/pngwutil.c	2008-05-01 09:49:58.000000000 +0000
-@@ -498,6 +498,11 @@
-    /* write the chunk */
-    png_write_chunk(png_ptr, png_IHDR, buf, (png_size_t)13);
- 
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   png_ptr->first_frame_width = width;
-+   png_ptr->first_frame_height = height;
-+#endif
-+
-    /* initialize zlib with PNG info */
-    png_ptr->zstream.zalloc = png_zalloc;
-    png_ptr->zstream.zfree = png_zfree;
-@@ -619,6 +624,9 @@
- {
- #ifdef PNG_USE_LOCAL_ARRAYS
-    PNG_IDAT;
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   PNG_fdAT;
-+#endif
- #endif
-    png_debug(1, "in png_write_IDAT\n");
- 
-@@ -661,7 +669,28 @@
-             "Invalid zlib compression method or flags in IDAT");
-    }
- 
--   png_write_chunk(png_ptr, png_IDAT, data, length);
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   if(png_ptr->num_frames_written == 0)
-+#endif
-+      png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length);
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   else
-+   {
-+      png_byte buf[4];
-+      
-+      png_write_chunk_start(png_ptr, (png_bytep)png_fdAT, 4 + length);
-+      
-+      png_save_uint_32(buf, png_ptr->next_seq_num);
-+      png_write_chunk_data(png_ptr, buf, 4);
-+      
-+      png_write_chunk_data(png_ptr, data, length);
-+      
-+      png_write_chunk_end(png_ptr);
-+      
-+      png_ptr->next_seq_num++;
-+   }
-+#endif
-+
-    png_ptr->mode |= PNG_HAVE_IDAT;
- }
- 
-@@ -673,7 +702,7 @@
-    PNG_IEND;
- #endif
-    png_debug(1, "in png_write_IEND\n");
--   png_write_chunk(png_ptr, png_IEND, png_bytep_NULL,
-+   png_write_chunk(png_ptr, (png_bytep)png_IEND, png_bytep_NULL,
-      (png_size_t)0);
-    png_ptr->mode |= PNG_HAVE_IEND;
- }
-@@ -1732,6 +1761,70 @@
- }
- #endif
- 
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+void /* PRIVATE */
-+png_write_acTL(png_structp png_ptr,
-+   png_uint_32 num_frames, png_uint_32 num_plays)
-+{
-+#ifdef PNG_USE_LOCAL_ARRAYS
-+    PNG_acTL;
-+#endif
-+    png_byte data[16];
-+    
-+    png_debug(1, "in png_write_acTL\n");
-+    
-+    png_ptr->num_frames_to_write = num_frames;
-+    
-+    if (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN)
-+        num_frames--;
-+    
-+    png_save_uint_32(data, num_frames);
-+    png_save_uint_32(data + 4, num_plays);
-+    
-+    png_write_chunk(png_ptr, (png_bytep)png_acTL, data, (png_size_t)8);
-+}
-+
-+void /* PRIVATE */
-+png_write_fcTL(png_structp png_ptr, png_uint_32 width, png_uint_32 height, 
-+    png_uint_32 x_offset, png_uint_32 y_offset,
-+    png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, 
-+    png_byte blend_op)
-+{
-+#ifdef PNG_USE_LOCAL_ARRAYS
-+    PNG_fcTL;
-+#endif
-+    png_byte data[26];
-+    
-+    png_debug(1, "in png_write_fcTL\n");
-+    
-+    if (png_ptr->num_frames_written == 0 && (x_offset != 0 || y_offset != 0))
-+        png_error(png_ptr, "x and/or y offset for the first frame aren't 0\n");
-+    if (png_ptr->num_frames_written == 0 && 
-+        (width != png_ptr->first_frame_width || 
-+         height != png_ptr->first_frame_height))
-+        png_error(png_ptr, "width and/or height in the first frame's fcTL "
-+                           "don't match the ones in IHDR\n");
-+    
-+    /* more error checking */
-+    png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset, 
-+                             delay_num, delay_den, dispose_op, blend_op);
-+    
-+    png_save_uint_32(data, png_ptr->next_seq_num);
-+    png_save_uint_32(data + 4, width);
-+    png_save_uint_32(data + 8, height);
-+    png_save_uint_32(data + 12, x_offset);
-+    png_save_uint_32(data + 16, y_offset);
-+    png_save_uint_16(data + 20, delay_num);
-+    png_save_uint_16(data + 22, delay_den);
-+    data[24] = dispose_op;
-+    data[25] = blend_op;
-+    
-+    png_write_chunk(png_ptr, (png_bytep)png_fcTL, data, (png_size_t)26);
-+    
-+    png_ptr->next_seq_num++;
-+}
-+#endif /* PNG_WRITE_APNG_SUPPORTED */
-+
- /* initializes the row writing capability of libpng */
- void /* PRIVATE */
- png_write_start_row(png_structp png_ptr)
-@@ -2799,4 +2892,39 @@
-    }
- #endif
- }
-+
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+void /* PRIVATE */
-+png_write_reset(png_structp png_ptr)
-+{
-+    png_ptr->row_number = 0;
-+    png_ptr->pass = 0;
-+    png_ptr->mode &= ~PNG_HAVE_IDAT;
-+}
-+
-+void /* PRIVATE */
-+png_write_reinit(png_structp png_ptr, png_infop info_ptr, 
-+                 png_uint_32 width, png_uint_32 height)
-+{
-+    if (png_ptr->num_frames_written == 0 && 
-+        (width != png_ptr->first_frame_width || 
-+         height != png_ptr->first_frame_height))
-+        png_error(png_ptr, "width and/or height in the first frame's fcTL "
-+                           "don't match the ones in IHDR\n");
-+    if (width > png_ptr->first_frame_width || 
-+        height > png_ptr->first_frame_height)
-+        png_error(png_ptr, "width and/or height for a frame greater than"
-+                           "the ones in IHDR");
-+    
-+    png_set_IHDR(png_ptr, info_ptr, width, height, 
-+                 info_ptr->bit_depth, info_ptr->color_type, 
-+                 info_ptr->interlace_type, info_ptr->compression_type,
-+                 info_ptr->filter_type);
-+   
-+    png_ptr->width = width;
-+    png_ptr->height = height;
-+    png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width);
-+    png_ptr->usr_width = png_ptr->width;
-+}
-+#endif
- #endif /* PNG_WRITE_SUPPORTED */
diff --git a/abs/core/libpng/libpng-1.2.31-apng.patch b/abs/core/libpng/libpng-1.2.31-apng.patch
deleted file mode 100644
index 92bd20a..0000000
--- a/abs/core/libpng/libpng-1.2.31-apng.patch
+++ /dev/null
@@ -1,1644 +0,0 @@
-Index: pngread.c
-===================================================================
---- pngread.c	(révision 149)
-+++ pngread.c	(copie de travail)
-@@ -407,6 +407,11 @@
- #if defined(PNG_READ_zTXt_SUPPORTED)
-       PNG_CONST PNG_zTXt;
- #endif
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      PNG_CONST PNG_acTL;
-+      PNG_CONST PNG_fcTL;
-+      PNG_CONST PNG_fdAT;
-+#endif
- #endif /* PNG_USE_LOCAL_ARRAYS */
-       png_uint_32 length = png_read_chunk_header(png_ptr);
-       PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
-@@ -451,6 +456,9 @@
-                   !(png_ptr->mode & PNG_HAVE_PLTE))
-             png_error(png_ptr, "Missing PLTE before IDAT");
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+         png_have_info(png_ptr, info_ptr);
-+#endif
-          png_ptr->idat_size = length;
-          png_ptr->mode |= PNG_HAVE_IDAT;
-          break;
-@@ -523,12 +531,97 @@
-       else if (!png_memcmp(chunk_name, png_iTXt, 4))
-          png_handle_iTXt(png_ptr, info_ptr, length);
- #endif
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4))
-+         png_handle_acTL(png_ptr, info_ptr, length);
-+      else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4))
-+         png_handle_fcTL(png_ptr, info_ptr, length);
-+      else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4))
-+         png_handle_fdAT(png_ptr, info_ptr, length);
-+#endif
-       else
-          png_handle_unknown(png_ptr, info_ptr, length);
-    }
- }
- #endif /* PNG_NO_SEQUENTIAL_READ_SUPPORTED */
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+void PNGAPI
-+png_read_frame_head(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_byte have_chunk_after_DAT; /* after IDAT or after fdAT */
-+    
-+    png_debug(0, "Reading frame head\n");
-+    
-+    if (!(png_ptr->mode & PNG_HAVE_acTL))
-+        png_error(png_ptr, "attempt to png_read_frame_head() but "
-+                           "no acTL present");
-+    
-+    /* do nothing for the main IDAT */
-+    if (png_ptr->num_frames_read == 0)
-+        return;
-+    
-+    png_crc_finish(png_ptr, 0); /* CRC from last IDAT or fdAT chunk */
-+    
-+    png_read_reset(png_ptr);
-+    png_ptr->mode &= ~PNG_HAVE_fcTL;
-+    
-+    have_chunk_after_DAT = 0;
-+    for (;;)
-+    {
-+#ifdef PNG_USE_LOCAL_ARRAYS
-+        PNG_IDAT;
-+        PNG_fdAT;
-+        PNG_fcTL;
-+#endif
-+        png_byte chunk_length[4];
-+        png_uint_32 length;
-+        
-+        png_read_data(png_ptr, chunk_length, 4);
-+        length = png_get_uint_31(png_ptr, chunk_length);
-+        
-+        png_reset_crc(png_ptr);
-+        png_crc_read(png_ptr, png_ptr->chunk_name, 4);
-+        
-+        if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
-+        {
-+            /* discard trailing IDATs for the first frame */
-+            if (have_chunk_after_DAT || png_ptr->num_frames_read > 1)
-+                png_error(png_ptr, "png_read_frame_head(): out of place IDAT");
-+            png_crc_finish(png_ptr, length);
-+        }
-+        else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4))
-+        {
-+            png_handle_fcTL(png_ptr, info_ptr, length);
-+            have_chunk_after_DAT = 1;
-+        }
-+        else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4))
-+        {
-+            png_ensure_sequence_number(png_ptr, length);
-+            
-+            /* discard trailing fdATs for frames other than the first */
-+            if (!have_chunk_after_DAT && png_ptr->num_frames_read > 1)
-+                png_crc_finish(png_ptr, length - 4);
-+            else if(png_ptr->mode & PNG_HAVE_fcTL)
-+            {
-+                png_ptr->idat_size = length - 4;
-+                png_ptr->mode |= PNG_HAVE_IDAT;
-+                
-+                break;
-+            }
-+            else
-+                png_error(png_ptr, "png_read_frame_head(): out of place fdAT");
-+        }
-+        else
-+        {
-+            png_warning(png_ptr, "Skipped (ignored) a chunk "
-+                                 "between APNG chunks");
-+            png_crc_finish(png_ptr, length);
-+        }
-+    }
-+}
-+#endif /* PNG_READ_APNG_SUPPORTED */
-+
- /* optional call to update the users info_ptr structure */
- void PNGAPI
- png_read_update_info(png_structp png_ptr, png_infop info_ptr)
-@@ -565,6 +658,10 @@
- {
- #ifdef PNG_USE_LOCAL_ARRAYS
-    PNG_CONST PNG_IDAT;
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+   PNG_CONST PNG_fdAT;
-+   PNG_CONST PNG_IEND;
-+#endif
-    PNG_CONST int png_pass_dsp_mask[7] = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55,
-       0xff};
-    PNG_CONST int png_pass_mask[7] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff};
-@@ -694,13 +791,40 @@
-    {
-       if (!(png_ptr->zstream.avail_in))
-       {
--         while (!png_ptr->idat_size)
-+         png_uint_32 bytes_to_skip = 0;
-+
-+         while (!png_ptr->idat_size || bytes_to_skip != 0)
-          {
--            png_crc_finish(png_ptr, 0);
-+            png_crc_finish(png_ptr, bytes_to_skip);
-+	    bytes_to_skip = 0;
- 
-             png_ptr->idat_size = png_read_chunk_header(png_ptr);
-+            
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+            if (png_ptr->num_frames_read == 0)
-+            {
-+#endif
-             if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
-                png_error(png_ptr, "Not enough image data");
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+            }
-+            else
-+            {
-+               if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
-+                  png_error(png_ptr, "Not enough image data");
-+               if (png_memcmp(png_ptr->chunk_name, png_fdAT, 4))
-+               {
-+                  png_warning(png_ptr, "Skipped (ignored) a chunk "
-+                                       "between APNG chunks");
-+                  bytes_to_skip = png_ptr->idat_size;
-+                  continue;
-+               }
-+               
-+               png_ensure_sequence_number(png_ptr, png_ptr->idat_size);
-+               
-+               png_ptr->idat_size -= 4;
-+            }
-+#endif
-          }
-          png_ptr->zstream.avail_in = (uInt)png_ptr->zbuf_size;
-          png_ptr->zstream.next_in = png_ptr->zbuf;
-@@ -718,6 +842,9 @@
-             png_error(png_ptr, "Extra compressed data");
-          png_ptr->mode |= PNG_AFTER_IDAT;
-          png_ptr->flags |= PNG_FLAG_ZLIB_FINISHED;
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+         png_ptr->num_frames_read++;
-+#endif
-          break;
-       }
-       if (ret != Z_OK)
-@@ -969,6 +1096,11 @@
- #if defined(PNG_READ_zTXt_SUPPORTED)
-       PNG_CONST PNG_zTXt;
- #endif
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      PNG_CONST PNG_acTL;
-+      PNG_CONST PNG_fcTL;
-+      PNG_CONST PNG_fdAT;
-+#endif
- #endif /* PNG_USE_LOCAL_ARRAYS */
-       png_uint_32 length = png_read_chunk_header(png_ptr);
-       PNG_CONST png_bytep chunk_name = png_ptr->chunk_name;
-@@ -1069,6 +1201,14 @@
-       else if (!png_memcmp(chunk_name, png_iTXt, 4))
-          png_handle_iTXt(png_ptr, info_ptr, length);
- #endif
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4))
-+         png_handle_acTL(png_ptr, info_ptr, length);
-+      else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4))
-+         png_handle_fcTL(png_ptr, info_ptr, length);
-+      else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4))
-+         png_handle_fdAT(png_ptr, info_ptr, length);
-+#endif
-       else
-          png_handle_unknown(png_ptr, info_ptr, length);
-    } while (!(png_ptr->mode & PNG_HAVE_IEND));
-Index: pngget.c
-===================================================================
---- pngget.c	(révision 149)
-+++ pngget.c	(copie de travail)
-@@ -797,6 +797,167 @@
- }
- #endif
- 
-+#if defined(PNG_APNG_SUPPORTED)
-+png_uint_32 PNGAPI
-+png_get_acTL(png_structp png_ptr, png_infop info_ptr,
-+             png_uint_32 *num_frames, png_uint_32 *num_plays)
-+{
-+    png_debug1(1, "in %s retrieval function\n", "acTL");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL &&
-+        (info_ptr->valid & PNG_INFO_acTL) &&
-+        num_frames != NULL && num_plays != NULL)
-+    {
-+        *num_frames = info_ptr->num_frames;
-+        *num_plays = info_ptr->num_plays;
-+        return (1);
-+    }
-+    
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_num_frames(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_num_frames()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->num_frames);
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_num_plays(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_num_plays()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->num_plays);
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr,
-+             png_uint_32 *width, png_uint_32 *height,
-+             png_uint_32 *x_offset, png_uint_32 *y_offset,
-+             png_uint_16 *delay_num, png_uint_16 *delay_den,
-+             png_byte *dispose_op, png_byte *blend_op)
-+{
-+    png_debug1(1, "in %s retrieval function\n", "fcTL");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL &&
-+        (info_ptr->valid & PNG_INFO_fcTL) &&
-+        width != NULL && height != NULL && 
-+        x_offset != NULL && x_offset != NULL && 
-+        delay_num != NULL && delay_den != NULL &&
-+	dispose_op != NULL && blend_op != NULL)
-+    {
-+        *width = info_ptr->next_frame_width;
-+        *height = info_ptr->next_frame_height;
-+        *x_offset = info_ptr->next_frame_x_offset;
-+        *y_offset = info_ptr->next_frame_y_offset;
-+        *delay_num = info_ptr->next_frame_delay_num;
-+        *delay_den = info_ptr->next_frame_delay_den;
-+        *dispose_op = info_ptr->next_frame_dispose_op;
-+        *blend_op = info_ptr->next_frame_blend_op;
-+        return (1);
-+    }
-+    
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_next_frame_width(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_width()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_width);
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_next_frame_height(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_height()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_height);
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_next_frame_x_offset(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_x_offset()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_x_offset);
-+    return (0);
-+}
-+
-+png_uint_32 PNGAPI
-+png_get_next_frame_y_offset(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_y_offset()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_y_offset);
-+    return (0);
-+}
-+
-+png_uint_16 PNGAPI
-+png_get_next_frame_delay_num(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_delay_num()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_delay_num);
-+    return (0);
-+}
-+
-+png_uint_16 PNGAPI
-+png_get_next_frame_delay_den(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_delay_den()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_delay_den);
-+    return (0);
-+}
-+
-+png_byte PNGAPI
-+png_get_next_frame_dispose_op(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_dispose_op()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_dispose_op);
-+    return (0);
-+}
-+
-+png_byte PNGAPI
-+png_get_next_frame_blend_op(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_get_next_frame_blend_op()\n");
-+    
-+    if (png_ptr != NULL && info_ptr != NULL)
-+        return (info_ptr->next_frame_blend_op);
-+    return (0);
-+}
-+
-+png_byte PNGAPI
-+png_get_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_debug(1, "in png_first_frame_is_hidden()\n");
-+    
-+    if (png_ptr != NULL)
-+       return (png_byte)(png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN);
-+    
-+    return 0;
-+}
-+#endif /* PNG_APNG_SUPPORTED */
-+
- #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
- png_uint_32 PNGAPI
- png_get_unknown_chunks(png_structp png_ptr, png_infop info_ptr,
-Index: png.c
-===================================================================
---- png.c	(révision 149)
-+++ png.c	(copie de travail)
-@@ -51,6 +51,9 @@
- PNG_tIME;
- PNG_tRNS;
- PNG_zTXt;
-+PNG_acTL;
-+PNG_fcTL;
-+PNG_fdAT;
- 
- #ifdef PNG_READ_SUPPORTED
- /* arrays to facilitate easy interlacing - use pass (0 - 6) as index */
-Index: png.h
-===================================================================
---- png.h	(révision 149)
-+++ png.h	(copie de travail)
-@@ -949,6 +949,19 @@
-    png_fixed_point int_y_blue;
- #endif
- 
-+#if defined(PNG_APNG_SUPPORTED)
-+   png_uint_32 num_frames; /* including default image */
-+   png_uint_32 num_plays;
-+   png_uint_32 next_frame_width;
-+   png_uint_32 next_frame_height;
-+   png_uint_32 next_frame_x_offset;
-+   png_uint_32 next_frame_y_offset;
-+   png_uint_16 next_frame_delay_num;
-+   png_uint_16 next_frame_delay_den;
-+   png_byte next_frame_dispose_op;
-+   png_byte next_frame_blend_op;
-+#endif
-+
- } png_info;
- 
- typedef png_info FAR * png_infop;
-@@ -1050,6 +1063,8 @@
- #define PNG_INFO_sPLT 0x2000   /* ESR, 1.0.6 */
- #define PNG_INFO_sCAL 0x4000   /* ESR, 1.0.6 */
- #define PNG_INFO_IDAT 0x8000L  /* ESR, 1.0.6 */
-+#define PNG_INFO_acTL 0x10000L
-+#define PNG_INFO_fcTL 0x20000L
- 
- /* This is used for the transformation routines, as some of them
-  * change these values for the row.  It also should enable using
-@@ -1090,7 +1105,11 @@
- typedef void (PNGAPI *png_progressive_end_ptr) PNGARG((png_structp, png_infop));
- typedef void (PNGAPI *png_progressive_row_ptr) PNGARG((png_structp, png_bytep,
-    png_uint_32, int));
-+#if defined(PNG_APNG_SUPPORTED)
-+typedef void (PNGAPI *png_progressive_frame_ptr) PNGARG((png_structp, 
-+   png_uint_32));
- #endif
-+#endif
- 
- #if defined(PNG_READ_USER_TRANSFORM_SUPPORTED) || \
-     defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) || \
-@@ -1421,6 +1440,39 @@
-    png_uint_32 user_height_max;
- #endif
- 
-+#if defined(PNG_APNG_SUPPORTED)
-+   png_uint_32 apng_flags;
-+   png_uint_32 next_seq_num;         /* next fcTL/fdAT chunk sequence number */
-+   png_uint_32 first_frame_width;
-+   png_uint_32 first_frame_height;
-+
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+   png_uint_32 num_frames_read;      /* incremented after all image data of */
-+                                     /* a frame is read */
-+#ifdef PNG_PROGRESSIVE_READ_SUPPORTED
-+   png_progressive_frame_ptr frame_info_fn; /* frame info read callback */
-+   png_progressive_frame_ptr frame_end_fn;  /* frame data read callback */
-+#endif
-+#endif
-+
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   png_uint_32 num_frames_to_write;
-+   png_uint_32 num_frames_written;
-+#endif
-+#endif
-+
-+/* For png_struct.apng_flags: */
-+#define PNG_FIRST_FRAME_HIDDEN       0x0001
-+
-+/* dispose_op flags from inside fcTL */
-+#define PNG_DISPOSE_OP_NONE        0x00
-+#define PNG_DISPOSE_OP_BACKGROUND  0x01
-+#define PNG_DISPOSE_OP_PREVIOUS    0x02
-+
-+/* blend_op flags from inside fcTL */
-+#define PNG_BLEND_OP_SOURCE        0x00
-+#define PNG_BLEND_OP_OVER          0x01
-+
- /* New member added in libpng-1.0.25 and 1.2.17 */
- #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
-    /* storage for unknown chunk that the library doesn't recognize. */
-@@ -1747,6 +1799,18 @@
- extern PNG_EXPORT(void,png_write_image) PNGARG((png_structp png_ptr,
-    png_bytepp image));
- 
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+extern PNG_EXPORT (void,png_write_frame_head) PNGARG((png_structp png_ptr,
-+   png_infop png_info, png_bytepp row_pointers,
-+   png_uint_32 width, png_uint_32 height,
-+   png_uint_32 x_offset, png_uint_32 y_offset, 
-+   png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
-+   png_byte blend_op));
-+
-+extern PNG_EXPORT (void,png_write_frame_tail) PNGARG((png_structp png_ptr,
-+   png_infop png_info));
-+#endif
-+   
- /* writes the end of the PNG file. */
- extern PNG_EXPORT(void,png_write_end) PNGARG((png_structp png_ptr,
-    png_infop info_ptr));
-@@ -1995,6 +2059,11 @@
-    png_voidp progressive_ptr,
-    png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn,
-    png_progressive_end_ptr end_fn));
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+extern PNG_EXPORT(void,png_set_progressive_frame_fn) PNGARG((png_structp png_ptr,
-+   png_progressive_frame_ptr frame_info_fn,
-+   png_progressive_frame_ptr frame_end_fn));
-+#endif
- 
- /* returns the user pointer associated with the push read functions */
- extern PNG_EXPORT(png_voidp,png_get_progressive_ptr)
-@@ -2432,6 +2501,59 @@
- #endif
- #endif /* PNG_sCAL_SUPPORTED || PNG_WRITE_sCAL_SUPPORTED */
- 
-+#if defined(PNG_APNG_SUPPORTED)
-+extern PNG_EXPORT(png_uint_32,png_get_acTL) PNGARG((png_structp png_ptr,
-+   png_infop info_ptr, png_uint_32 *num_frames, png_uint_32 *num_plays));
-+extern PNG_EXPORT(png_uint_32,png_set_acTL) PNGARG((png_structp png_ptr, 
-+   png_infop info_ptr, png_uint_32 num_frames, png_uint_32 num_plays));
-+extern PNG_EXPORT(png_uint_32,png_get_num_frames) PNGARG((png_structp png_ptr,
-+   png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_32,png_get_num_plays) 
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+
-+extern PNG_EXPORT(png_uint_32,png_get_next_frame_fcTL) 
-+   PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 *width, 
-+   png_uint_32 *height, png_uint_32 *x_offset, png_uint_32 *y_offset, 
-+   png_uint_16 *delay_num, png_uint_16 *delay_den, png_byte *dispose_op,
-+   png_byte *blend_op));
-+extern PNG_EXPORT(png_uint_32,png_set_next_frame_fcTL) 
-+   PNGARG((png_structp png_ptr, png_infop info_ptr, png_uint_32 width, 
-+   png_uint_32 height, png_uint_32 x_offset, png_uint_32 y_offset, 
-+   png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
-+   png_byte blend_op));
-+extern PNG_EXPORT(void,png_ensure_fcTL_is_valid)
-+   PNGARG((png_structp png_ptr,
-+   png_uint_32 width, png_uint_32 height,
-+   png_uint_32 x_offset, png_uint_32 y_offset,
-+   png_uint_16 delay_num, png_uint_16 delay_den,
-+   png_byte dispose_op, png_byte blend_op));
-+extern PNG_EXPORT(png_uint_32,png_get_next_frame_width)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_32,png_get_next_frame_height)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_32,png_get_next_frame_x_offset)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_32,png_get_next_frame_y_offset)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_16,png_get_next_frame_delay_num)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_16,png_get_next_frame_delay_den)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_byte,png_get_next_frame_dispose_op)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_byte,png_get_next_frame_blend_op)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_byte,png_get_first_frame_is_hidden)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr));
-+extern PNG_EXPORT(png_uint_32,png_set_first_frame_is_hidden)
-+   PNGARG((png_structp png_ptr, png_infop info_ptr, png_byte is_hidden));
-+#endif /* PNG_APNG_SUPPORTED */
-+
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+extern PNG_EXPORT(void,png_read_frame_head) PNGARG((png_structp png_ptr,
-+   png_infop info_ptr));
-+#endif
-+
- #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
- /* provide a list of chunks and how they are to be handled, if the built-in
-    handling or default unknown chunk handling is not desired.  Any chunks not
-@@ -2738,6 +2860,8 @@
- #define PNG_BACKGROUND_IS_GRAY     0x800
- #define PNG_HAVE_PNG_SIGNATURE    0x1000
- #define PNG_HAVE_CHUNK_AFTER_IDAT 0x2000 /* Have another chunk after IDAT */
-+#define PNG_HAVE_acTL             0x4000
-+#define PNG_HAVE_fcTL             0x8000L
- 
- /* flags for the transformations the PNG library does on the image data */
- #define PNG_BGR                0x0001
-@@ -2878,6 +3002,9 @@
- #define PNG_tIME png_byte png_tIME[5] = {116,  73,  77,  69, '\0'}
- #define PNG_tRNS png_byte png_tRNS[5] = {116,  82,  78,  83, '\0'}
- #define PNG_zTXt png_byte png_zTXt[5] = {122,  84,  88, 116, '\0'}
-+#define PNG_acTL png_byte png_acTL[5] = { 97,  99,  84,  76, '\0'}
-+#define PNG_fcTL png_byte png_fcTL[5] = {102,  99,  84,  76, '\0'}
-+#define PNG_fdAT png_byte png_fdAT[5] = {102, 100,  65,  84, '\0'}
- 
- #ifdef PNG_USE_GLOBAL_ARRAYS
- PNG_EXPORT_VAR (png_byte FARDATA) png_IHDR[5];
-@@ -2901,6 +3028,9 @@
- PNG_EXPORT_VAR (png_byte FARDATA) png_tIME[5];
- PNG_EXPORT_VAR (png_byte FARDATA) png_tRNS[5];
- PNG_EXPORT_VAR (png_byte FARDATA) png_zTXt[5];
-+PNG_EXPORT_VAR (png_byte FARDATA) png_acTL[5];
-+PNG_EXPORT_VAR (png_byte FARDATA) png_fcTL[5];
-+PNG_EXPORT_VAR (png_byte FARDATA) png_fdAT[5];
- #endif /* PNG_USE_GLOBAL_ARRAYS */
- 
- #if defined(PNG_1_0_X) || defined (PNG_1_2_X)
-@@ -3175,6 +3305,17 @@
- #endif
- #endif
- 
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+PNG_EXTERN void png_write_acTL PNGARG((png_structp png_ptr,
-+   png_uint_32 num_frames, png_uint_32 num_plays));
-+
-+PNG_EXTERN void png_write_fcTL PNGARG((png_structp png_ptr, 
-+   png_uint_32 width, png_uint_32 height, 
-+   png_uint_32 x_offset, png_uint_32 y_offset, 
-+   png_uint_16 delay_num, png_uint_16 delay_den,
-+   png_byte dispose_op, png_byte blend_op));
-+#endif
-+
- /* Called when finished processing a row of data */
- PNG_EXTERN void png_write_finish_row PNGARG((png_structp png_ptr));
- 
-@@ -3226,6 +3367,20 @@
- PNG_EXTERN void png_read_transform_info PNGARG((png_structp png_ptr,
-    png_infop info_ptr));
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+/* private, reset some things to become ready for reading next frame */
-+PNG_EXTERN void png_read_reset PNGARG((png_structp png_ptr));
-+PNG_EXTERN void png_read_reinit PNGARG((png_structp png_ptr,
-+   png_infop info_ptr));
-+PNG_EXTERN void png_progressive_read_reset PNGARG((png_structp png_ptr));
-+#endif
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+/* private, reset some things to become ready for writing next frame */
-+PNG_EXTERN void png_write_reset PNGARG((png_structp png_ptr));
-+PNG_EXTERN void png_write_reinit PNGARG((png_structp png_ptr, 
-+   png_infop info_ptr, png_uint_32 width, png_uint_32 height));
-+#endif
-+
- /* these are the functions that do the transformations */
- #if defined(PNG_READ_FILLER_SUPPORTED)
- PNG_EXTERN void png_do_read_filler PNGARG((png_row_infop row_info,
-@@ -3441,6 +3596,18 @@
-    png_uint_32 length));
- #endif
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+PNG_EXTERN void png_handle_acTL PNGARG((png_structp png_ptr, png_infop info_ptr,
-+   png_uint_32 length));
-+PNG_EXTERN void png_handle_fcTL PNGARG((png_structp png_ptr, png_infop info_ptr,
-+   png_uint_32 length));
-+PNG_EXTERN void png_have_info PNGARG((png_structp png_ptr, png_infop info_ptr));
-+PNG_EXTERN void png_handle_fdAT PNGARG((png_structp png_ptr, png_infop info_ptr,
-+   png_uint_32 length));
-+PNG_EXTERN void png_ensure_sequence_number PNGARG((png_structp png_ptr, 
-+   png_uint_32 length));
-+#endif
-+
- PNG_EXTERN void png_handle_unknown PNGARG((png_structp png_ptr,
-    png_infop info_ptr, png_uint_32 length));
- 
-Index: pngwrite.c
-===================================================================
---- pngwrite.c	(révision 149)
-+++ pngwrite.c	(copie de travail)
-@@ -261,6 +261,10 @@
-       }
-    }
- #endif
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   if (info_ptr->valid & PNG_INFO_acTL)
-+      png_write_acTL(png_ptr, info_ptr->num_frames, info_ptr->num_plays);
-+#endif
- #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED)
-    if (info_ptr->unknown_chunks_num)
-    {
-@@ -299,6 +303,10 @@
-       return;
-    if (!(png_ptr->mode & PNG_HAVE_IDAT))
-       png_error(png_ptr, "No IDATs written into file");
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   if (png_ptr->num_frames_written != png_ptr->num_frames_to_write)
-+      png_error(png_ptr, "Not enough frames written");
-+#endif
- 
-    /* see if user wants us to write information chunks */
-    if (info_ptr != NULL)
-@@ -1527,4 +1535,39 @@
-    params = params;
- }
- #endif
-+
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+void PNGAPI
-+png_write_frame_head(png_structp png_ptr, png_infop info_ptr,
-+    png_bytepp row_pointers, png_uint_32 width, png_uint_32 height, 
-+    png_uint_32 x_offset, png_uint_32 y_offset, 
-+    png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op,
-+    png_byte blend_op)
-+{
-+    png_debug(1, "in png_write_frame_head\n");
-+    
-+    /* there is a chance this has been set after png_write_info was called,
-+    * so it would be set but not written. is there a way to be sure? */
-+    if (!(info_ptr->valid & PNG_INFO_acTL))
-+        png_error(png_ptr, "png_write_frame_head(): acTL not set");
-+    
-+    png_write_reset(png_ptr);
-+    
-+    png_write_reinit(png_ptr, info_ptr, width, height);
-+    
-+    if ( !(png_ptr->num_frames_written == 0 && 
-+           (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN) ) )
-+        png_write_fcTL(png_ptr, width, height, x_offset, y_offset, 
-+                       delay_num, delay_den, dispose_op, blend_op);
-+}
-+
-+void PNGAPI
-+png_write_frame_tail(png_structp png_ptr, png_infop png_info)
-+{
-+    png_debug(1, "in png_write_frame_tail\n");
-+    
-+    png_ptr->num_frames_written++;
-+}
-+#endif /* PNG_WRITE_APNG_SUPPORTED */
-+
- #endif /* PNG_WRITE_SUPPORTED */
-Index: pngconf.h
-===================================================================
---- pngconf.h	(révision 149)
-+++ pngconf.h	(copie de travail)
-@@ -925,6 +925,10 @@
- #  define PNG_READ_zTXt_SUPPORTED
- #  define PNG_zTXt_SUPPORTED
- #endif
-+#ifndef PNG_NO_READ_APNG
-+#  define PNG_READ_APNG_SUPPORTED
-+#  define PNG_APNG_SUPPORTED
-+#endif
- #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
- #  define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
- #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
-@@ -1067,6 +1071,12 @@
- #    define PNG_zTXt_SUPPORTED
- #  endif
- #endif
-+#ifndef PNG_NO_WRITE_APNG
-+#  define PNG_WRITE_APNG_SUPPORTED
-+#  ifndef PNG_APNG_SUPPORTED
-+#    define PNG_APNG_SUPPORTED
-+#  endif
-+#endif
- #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
- #  define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
- #  ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
-Index: pngpread.c
-===================================================================
---- pngpread.c	(révision 149)
-+++ pngpread.c	(copie de travail)
-@@ -192,6 +192,11 @@
- #if defined(PNG_READ_zTXt_SUPPORTED)
-       PNG_CONST PNG_zTXt;
- #endif
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      PNG_CONST PNG_acTL;
-+      PNG_CONST PNG_fcTL;
-+      PNG_CONST PNG_fdAT;
-+#endif
- #endif /* PNG_USE_LOCAL_ARRAYS */
-    /* First we make sure we have enough data for the 4 byte chunk name
-     * and the 4 byte chunk length before proceeding with decoding the
-@@ -215,7 +220,104 @@
-       png_crc_read(png_ptr, png_ptr->chunk_name, 4);
-       png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
-    }
--
-+   
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+   if (png_ptr->num_frames_read > 0 && 
-+       png_ptr->num_frames_read < info_ptr->num_frames)
-+   {
-+      if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
-+      {
-+         /* discard trailing IDATs for the first frame */
-+         if (png_ptr->mode & PNG_HAVE_fcTL || png_ptr->num_frames_read > 1)
-+            png_error(png_ptr, "out of place IDAT");
-+         
-+         if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+         {
-+            png_push_save_buffer(png_ptr);
-+            return;
-+         }
-+         png_push_crc_skip(png_ptr, png_ptr->push_length);
-+         png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
-+         return;
-+      }
-+      else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4))
-+      {
-+         if (png_ptr->buffer_size < 4)
-+         {
-+            png_push_save_buffer(png_ptr);
-+            return;
-+         }
-+         png_ensure_sequence_number(png_ptr, 4);
-+         
-+         if (!(png_ptr->mode & PNG_HAVE_fcTL))
-+         {
-+            /* discard trailing fdATs for frames other than the first */
-+            if (png_ptr->num_frames_read < 2)
-+               png_error(png_ptr, "out of place fdAT");
-+            
-+            if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+            {
-+               png_push_save_buffer(png_ptr);
-+               return;
-+            }
-+            png_push_crc_skip(png_ptr, png_ptr->push_length);
-+            png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
-+            return;
-+         }
-+         else
-+         {
-+            /* frame data follows */
-+            png_ptr->idat_size = png_ptr->push_length - 4;
-+            png_ptr->mode |= PNG_HAVE_IDAT;
-+            png_ptr->process_mode = PNG_READ_IDAT_MODE;
-+            
-+            return;
-+         }
-+      }
-+      else if(!png_memcmp(png_ptr->chunk_name, png_fcTL, 4))
-+      {
-+         if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+         {
-+            png_push_save_buffer(png_ptr);
-+            return;
-+         }
-+         
-+         png_read_reset(png_ptr);
-+         png_ptr->mode &= ~PNG_HAVE_fcTL;
-+         
-+         png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length);
-+         
-+         if (!(png_ptr->mode & PNG_HAVE_fcTL))
-+            png_error(png_ptr, "missing required fcTL chunk");
-+         
-+         png_read_reinit(png_ptr, info_ptr);
-+         png_progressive_read_reset(png_ptr);
-+         
-+         if (png_ptr->frame_info_fn != NULL)
-+            (*(png_ptr->frame_info_fn))(png_ptr, png_ptr->num_frames_read);
-+         
-+         png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
-+         
-+         return;
-+      }
-+      else
-+      {
-+         if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+         {
-+            png_push_save_buffer(png_ptr);
-+            return;
-+         }
-+         png_warning(png_ptr, "Skipped (ignored) a chunk "
-+                              "between APNG chunks");
-+         png_push_crc_skip(png_ptr, png_ptr->push_length);
-+         png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
-+         return;
-+      }
-+      
-+      return;
-+   }
-+#endif /* PNG_READ_APNG_SUPPORTED */
-+   
-    if (!png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
-      if(png_ptr->mode & PNG_AFTER_IDAT)
-         png_ptr->mode |= PNG_HAVE_CHUNK_AFTER_IDAT;
-@@ -295,6 +397,9 @@
-             png_error(png_ptr, "Too many IDAT's found");
-       }
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      png_have_info(png_ptr, info_ptr);
-+#endif
-       png_ptr->idat_size = png_ptr->push_length;
-       png_ptr->mode |= PNG_HAVE_IDAT;
-       png_ptr->process_mode = PNG_READ_IDAT_MODE;
-@@ -490,6 +595,35 @@
-       png_push_handle_iTXt(png_ptr, info_ptr, png_ptr->push_length);
-    }
- #endif
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+   else if (!png_memcmp(png_ptr->chunk_name, png_acTL, 4))
-+   {
-+      if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+      {
-+         png_push_save_buffer(png_ptr);
-+         return;
-+      }
-+      png_handle_acTL(png_ptr, info_ptr, png_ptr->push_length);
-+   }
-+   else if (!png_memcmp(png_ptr->chunk_name, png_fcTL, 4))
-+   {
-+      if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+      {
-+         png_push_save_buffer(png_ptr);
-+         return;
-+      }
-+      png_handle_fcTL(png_ptr, info_ptr, png_ptr->push_length);
-+   }
-+   else if (!png_memcmp(png_ptr->chunk_name, png_fdAT, 4))
-+   {
-+      if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+      {
-+         png_push_save_buffer(png_ptr);
-+         return;
-+      }
-+      png_handle_fdAT(png_ptr, info_ptr, png_ptr->push_length);
-+   }
-+#endif /* PNG_READ_APNG_SUPPORTED */
-    else
-    {
-       if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-@@ -660,13 +794,17 @@
- png_push_read_IDAT(png_structp png_ptr)
- {
- #ifdef PNG_USE_LOCAL_ARRAYS
--   PNG_CONST PNG_IDAT;
-+   PNG_IDAT;
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+   PNG_fdAT;
-+   PNG_IEND;
- #endif
-+#endif
-    if (!(png_ptr->mode & PNG_HAVE_CHUNK_HEADER))
-    {
-       png_byte chunk_length[4];
- 
--      if (png_ptr->buffer_size < 8)
-+      if (png_ptr->buffer_size < 12)
-       {
-          png_push_save_buffer(png_ptr);
-          return;
-@@ -678,15 +816,59 @@
-       png_crc_read(png_ptr, png_ptr->chunk_name, 4);
-       png_ptr->mode |= PNG_HAVE_CHUNK_HEADER;
- 
--      if (png_memcmp(png_ptr->chunk_name, png_IDAT, 4))
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      if (png_memcmp(png_ptr->chunk_name, (png_bytep)png_fdAT, 4)
-+          && png_ptr->num_frames_read > 0)
-       {
-+          if (png_ptr->flags & PNG_FLAG_ZLIB_FINISHED)
-+          {
-+              png_ptr->process_mode = PNG_READ_CHUNK_MODE;
-+              if (png_ptr->frame_end_fn != NULL)
-+                 (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read);
-+              png_ptr->num_frames_read++;
-+              return;
-+          }
-+          else
-+          {
-+              if (!png_memcmp(png_ptr->chunk_name, png_IEND, 4))
-+                  png_error(png_ptr, "Not enough image data");
-+              if (png_ptr->push_length + 4 > png_ptr->buffer_size)
-+              {
-+                 png_push_save_buffer(png_ptr);
-+                 return;
-+              }
-+              png_warning(png_ptr, "Skipping (ignoring) a chunk between "
-+                                   "APNG chunks");
-+              png_crc_finish(png_ptr, png_ptr->push_length);
-+              png_ptr->mode &= ~PNG_HAVE_CHUNK_HEADER;
-+              return;
-+          }
-+      }
-+      else 
-+#endif
-+      if ( png_memcmp(png_ptr->chunk_name, png_IDAT, 4)
-+                && (png_ptr->num_frames_read == 0) )
-+      {
-          png_ptr->process_mode = PNG_READ_CHUNK_MODE;
-          if (!(png_ptr->flags & PNG_FLAG_ZLIB_FINISHED))
-             png_error(png_ptr, "Not enough compressed data");
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+         if (png_ptr->frame_end_fn != NULL)
-+            (*(png_ptr->frame_end_fn))(png_ptr, png_ptr->num_frames_read);
-+         png_ptr->num_frames_read++;
-+#endif
-          return;
-       }
- 
-       png_ptr->idat_size = png_ptr->push_length;
-+      
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+      if(png_ptr->num_frames_read > 0)
-+      {
-+         png_ensure_sequence_number(png_ptr, 4);
-+         png_ptr->idat_size -= 4;
-+      }
-+#endif
-    }
-    if (png_ptr->idat_size && png_ptr->save_buffer_size)
-    {
-@@ -1582,6 +1764,17 @@
-    png_set_read_fn(png_ptr, progressive_ptr, png_push_fill_buffer);
- }
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+void PNGAPI
-+png_set_progressive_frame_fn(png_structp png_ptr,
-+   png_progressive_frame_ptr frame_info_fn,
-+   png_progressive_frame_ptr frame_end_fn)
-+{
-+   png_ptr->frame_info_fn = frame_info_fn;
-+   png_ptr->frame_end_fn = frame_end_fn;
-+}
-+#endif
-+
- png_voidp PNGAPI
- png_get_progressive_ptr(png_structp png_ptr)
- {
-Index: pngset.c
-===================================================================
---- pngset.c	(révision 149)
-+++ pngset.c	(copie de travail)
-@@ -363,6 +363,11 @@
-       info_ptr->rowbytes = (png_size_t)0;
-    else
-       info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
-+   
-+#if defined(PNG_APNG_SUPPORTED)
-+   /* for non-animated png. this may be overritten from an acTL chunk later */
-+   info_ptr->num_frames = 1;
-+#endif
- }
- 
- #if defined(PNG_oFFs_SUPPORTED)
-@@ -1043,6 +1048,141 @@
- }
- #endif /* PNG_sPLT_SUPPORTED */
- 
-+#if defined(PNG_APNG_SUPPORTED)
-+png_uint_32 PNGAPI
-+png_set_acTL(png_structp png_ptr, png_infop info_ptr, 
-+    png_uint_32 num_frames, png_uint_32 num_plays)
-+{
-+    png_debug1(1, "in %s storage function\n", "acTL");
-+
-+    if (png_ptr == NULL || info_ptr == NULL)
-+    {
-+        png_warning(png_ptr, 
-+                    "Call to png_set_acTL() with NULL png_ptr "
-+                    "or info_ptr ignored");
-+        return (0);
-+    }
-+    if (num_frames == 0)
-+    {
-+        png_warning(png_ptr, 
-+                    "Ignoring attempt to set acTL with num_frames zero");
-+        return (0);
-+    }
-+    if (num_frames > PNG_UINT_31_MAX)
-+    {
-+        png_warning(png_ptr, 
-+                    "Ignoring attempt to set acTL with num_frames > 2^31-1");
-+        return (0);
-+    }
-+    if (num_plays > PNG_UINT_31_MAX)
-+    {
-+        png_warning(png_ptr, 
-+                    "Ignoring attempt to set acTL with num_plays "
-+                    "> 2^31-1");
-+        return (0);
-+    }
-+    
-+    info_ptr->num_frames = num_frames;
-+    info_ptr->num_plays = num_plays;
-+    
-+    info_ptr->valid |= PNG_INFO_acTL;
-+    
-+    return (1);
-+}
-+
-+/* delay_num and delay_den can hold any 16-bit values including zero */
-+png_uint_32 PNGAPI
-+png_set_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr, 
-+    png_uint_32 width, png_uint_32 height,
-+    png_uint_32 x_offset, png_uint_32 y_offset,
-+    png_uint_16 delay_num, png_uint_16 delay_den,
-+    png_byte dispose_op, png_byte blend_op)
-+{
-+    png_debug1(1, "in %s storage function\n", "fcTL");
-+
-+    if (png_ptr == NULL || info_ptr == NULL)
-+    {
-+        png_warning(png_ptr, 
-+                    "Call to png_set_fcTL() with NULL png_ptr or info_ptr "
-+                    "ignored");
-+        return (0);
-+    }
-+    
-+    png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset, 
-+                             delay_num, delay_den, dispose_op, blend_op);
-+    
-+    info_ptr->next_frame_width = width;
-+    info_ptr->next_frame_height = height;
-+    info_ptr->next_frame_x_offset = x_offset;
-+    info_ptr->next_frame_y_offset = y_offset;
-+    info_ptr->next_frame_delay_num = delay_num;
-+    info_ptr->next_frame_delay_den = delay_den;
-+    info_ptr->next_frame_dispose_op = dispose_op;
-+    info_ptr->next_frame_blend_op = blend_op;
-+    
-+    info_ptr->valid |= PNG_INFO_fcTL;
-+    
-+    return (1);
-+}
-+
-+void /* PRIVATE */
-+png_ensure_fcTL_is_valid(png_structp png_ptr, 
-+    png_uint_32 width, png_uint_32 height,
-+    png_uint_32 x_offset, png_uint_32 y_offset,
-+    png_uint_16 delay_num, png_uint_16 delay_den,
-+    png_byte dispose_op, png_byte blend_op)
-+{
-+    if (width + x_offset > png_ptr->first_frame_width || 
-+        height + y_offset > png_ptr->first_frame_height)
-+        png_error(png_ptr, "dimensions of a frame are greater than"
-+                           "the ones in IHDR");
-+    if (width > PNG_UINT_31_MAX)
-+        png_error(png_ptr, "invalid width in fcTL (> 2^31-1)");
-+    if (height > PNG_UINT_31_MAX)
-+        png_error(png_ptr, "invalid height in fcTL (> 2^31-1)");
-+    if (x_offset > PNG_UINT_31_MAX)
-+        png_error(png_ptr, "invalid x_offset in fcTL (> 2^31-1)");
-+    if (y_offset > PNG_UINT_31_MAX)
-+        png_error(png_ptr, "invalid y_offset in fcTL (> 2^31-1)");
-+
-+    if (dispose_op != PNG_DISPOSE_OP_NONE &&
-+	dispose_op != PNG_DISPOSE_OP_BACKGROUND &&
-+	dispose_op != PNG_DISPOSE_OP_PREVIOUS)
-+        png_error(png_ptr, "invalid dispose_op in fcTL");
-+
-+    if (blend_op != PNG_BLEND_OP_SOURCE &&
-+	blend_op != PNG_BLEND_OP_OVER)
-+        png_error(png_ptr, "invalid blend_op in fcTL");
-+
-+    if (blend_op == PNG_BLEND_OP_OVER) {
-+        if (png_ptr->color_type == PNG_COLOR_TYPE_GRAY)
-+            png_error(png_ptr, "PNG_BLEND_OP_OVER is not valid for "
-+                               "color type 'greyscale without alpha'");
-+        else if ((png_ptr->color_type & PNG_COLOR_MASK_COLOR) &&
-+		 !(png_ptr->color_type & PNG_COLOR_MASK_ALPHA))
-+            png_error(png_ptr, "PNG_BLEND_OP_OVER is not valid for "
-+                               "color type 'truecolor without alpha'");
-+    }
-+}
-+
-+png_uint_32 PNGAPI
-+png_set_first_frame_is_hidden(png_structp png_ptr, png_infop info_ptr,
-+                              png_byte is_hidden)
-+{
-+    png_debug(1, "in png_first_frame_is_hidden()\n");
-+    
-+    if (png_ptr == NULL)
-+        return 0;
-+    
-+    if(is_hidden)
-+        png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN;
-+    else
-+        png_ptr->apng_flags &= ~PNG_FIRST_FRAME_HIDDEN;
-+    
-+    return 1;
-+}
-+#endif /* PNG_APNG_SUPPORTED */
-+
- #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
- void PNGAPI
- png_set_unknown_chunks(png_structp png_ptr,
-Index: pngrutil.c
-===================================================================
---- pngrutil.c	(révision 149)
-+++ pngrutil.c	(copie de travail)
-@@ -414,6 +414,11 @@
-    filter_type = buf[11];
-    interlace_type = buf[12];
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+   png_ptr->first_frame_width = width;
-+   png_ptr->first_frame_height = height;
-+#endif
-+
-    /* set internal variables */
-    png_ptr->width = width;
-    png_ptr->height = height;
-@@ -2220,6 +2225,168 @@
- }
- #endif
- 
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+void /* PRIVATE */
-+png_handle_acTL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-+{
-+    png_byte data[8];
-+    png_uint_32 num_frames;
-+    png_uint_32 num_plays;
-+    png_uint_32 didSet;
-+    
-+    png_debug(1, "in png_handle_acTL\n");
-+
-+    if (!(png_ptr->mode & PNG_HAVE_IHDR))
-+    {
-+        png_error(png_ptr, "Missing IHDR before acTL");
-+    }
-+    else if (png_ptr->mode & PNG_HAVE_IDAT)
-+    {
-+        png_warning(png_ptr, "Invalid acTL after IDAT skipped");
-+        png_crc_finish(png_ptr, length);
-+        return;
-+    }
-+    else if (png_ptr->mode & PNG_HAVE_acTL)
-+    {
-+        png_warning(png_ptr, "Duplicate acTL skipped");
-+        png_crc_finish(png_ptr, length);
-+        return;
-+    }
-+    else if (length != 8)
-+    {
-+        png_warning(png_ptr, "acTL with invalid length skipped");
-+        png_crc_finish(png_ptr, length);
-+        return;
-+    }
-+    
-+    png_crc_read(png_ptr, data, 8);
-+    png_crc_finish(png_ptr, 0);
-+    
-+    num_frames = png_get_uint_31(png_ptr, data);
-+    num_plays = png_get_uint_31(png_ptr, data + 4);
-+    
-+    /* the set function will do error checking on num_frames */
-+    didSet = png_set_acTL(png_ptr, info_ptr, num_frames, num_plays);
-+    if(didSet)
-+        png_ptr->mode |= PNG_HAVE_acTL;
-+}
-+
-+void /* PRIVATE */
-+png_handle_fcTL(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-+{
-+    png_byte data[22];
-+    png_uint_32 width;
-+    png_uint_32 height;
-+    png_uint_32 x_offset;
-+    png_uint_32 y_offset;
-+    png_uint_16 delay_num;
-+    png_uint_16 delay_den;
-+    png_byte dispose_op;
-+    png_byte blend_op;
-+    
-+    png_debug(1, "in png_handle_fcTL\n");
-+    
-+    if (!(png_ptr->mode & PNG_HAVE_IHDR))
-+    {
-+        png_error(png_ptr, "Missing IHDR before fcTL");
-+    }
-+    else if (png_ptr->mode & PNG_HAVE_IDAT)
-+    {
-+        /* for any frames other then the first this message may be misleading,
-+        * but correct. PNG_HAVE_IDAT is unset before the frame head is read
-+        * i can't think of a better message */
-+        png_warning(png_ptr, "Invalid fcTL after IDAT skipped");
-+        png_crc_finish(png_ptr, length);
-+        return;
-+    }
-+    else if (png_ptr->mode & PNG_HAVE_fcTL)
-+    {
-+        png_warning(png_ptr, "Duplicate fcTL within one frame skipped");
-+        png_crc_finish(png_ptr, length);
-+        return;
-+    }
-+    else if (length != 26)
-+    {
-+        png_warning(png_ptr, "fcTL with invalid length skipped");
-+        png_crc_finish(png_ptr, length);
-+        return;
-+    }
-+    
-+    png_ensure_sequence_number(png_ptr, length);
-+    
-+    png_crc_read(png_ptr, data, 22);
-+    png_crc_finish(png_ptr, 0);
-+    
-+    width = png_get_uint_31(png_ptr, data);
-+    height = png_get_uint_31(png_ptr, data + 4);
-+    x_offset = png_get_uint_31(png_ptr, data + 8);
-+    y_offset = png_get_uint_31(png_ptr, data + 12);
-+    delay_num = png_get_uint_16(data + 16);
-+    delay_den = png_get_uint_16(data + 18);
-+    dispose_op = data[20];
-+    blend_op = data[21];
-+    
-+    if (png_ptr->num_frames_read == 0 && (x_offset != 0 || y_offset != 0))
-+        png_error(png_ptr, "fcTL for the first frame must have zero offset");
-+    if (png_ptr->num_frames_read == 0 && 
-+        (width != info_ptr->width || height != info_ptr->height))
-+        png_error(png_ptr, "size in first frame's fcTL must match "
-+                           "the size in IHDR");
-+    
-+    /* the set function will do more error checking */
-+    png_set_next_frame_fcTL(png_ptr, info_ptr, width, height, 
-+                            x_offset, y_offset, delay_num, delay_den,
-+                            dispose_op, blend_op);
-+    
-+    png_read_reinit(png_ptr, info_ptr);
-+    
-+    png_ptr->mode |= PNG_HAVE_fcTL;
-+}
-+
-+void /* PRIVATE */
-+png_have_info(png_structp png_ptr, png_infop info_ptr)
-+{
-+    if((info_ptr->valid & PNG_INFO_acTL) && !(info_ptr->valid & PNG_INFO_fcTL))
-+    {
-+        png_ptr->apng_flags |= PNG_FIRST_FRAME_HIDDEN;
-+        info_ptr->num_frames++;
-+    }
-+}
-+
-+void /* PRIVATE */
-+png_handle_fdAT(png_structp png_ptr, png_infop info_ptr, png_uint_32 length)
-+{
-+    png_ensure_sequence_number(png_ptr, length);
-+    
-+    /* This function is only called from png_read_end(), png_read_info(), 
-+    * and png_push_read_chunk() which means that:
-+    * - the user doesn't want to read this frame
-+    * - or this is an out-of-place fdAT
-+    * in either case it is safe to ignore the chunk with a warning */
-+    png_warning(png_ptr, "ignoring fdAT chunk");
-+    png_crc_finish(png_ptr, length - 4);
-+}
-+
-+void /* PRIVATE */
-+png_ensure_sequence_number(png_structp png_ptr, png_uint_32 length)
-+{
-+    png_byte data[4];
-+    png_uint_32 sequence_number;
-+    
-+    if (length < 4)
-+        png_error(png_ptr, "invalid fcTL or fdAT chunk found");
-+    
-+    png_crc_read(png_ptr, data, 4);
-+    sequence_number = png_get_uint_31(png_ptr, data);
-+    
-+    if (sequence_number != png_ptr->next_seq_num)
-+        png_error(png_ptr, "fcTL or fdAT chunk with out-of-order sequence "
-+                           "number found");
-+    
-+    png_ptr->next_seq_num++;
-+}
-+#endif /* PNG_READ_APNG_SUPPORTED */
-+
- /* This function is called when we haven't found a handler for a
-    chunk.  If there isn't a problem with the chunk itself (ie bad
-    chunk name, CRC, or a critical chunk), the chunk is silently ignored
-@@ -3195,8 +3362,10 @@
-    if (row_bytes + 64 > png_ptr->old_big_row_buf_size)
-    {
-      png_free(png_ptr, png_ptr->big_row_buf);
--     png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes+64);
--     png_ptr->row_buf = png_ptr->big_row_buf+32;
-+     if (png_ptr->big_row_buf == NULL)
-+        png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes+64);
-+     if (png_ptr->row_buf == NULL)
-+        png_ptr->row_buf = png_ptr->big_row_buf+32;
-      png_ptr->old_big_row_buf_size = row_bytes+64;
-    }
- 
-@@ -3226,4 +3395,82 @@
- 
-    png_ptr->flags |= PNG_FLAG_ROW_INIT;
- }
-+
-+#if defined(PNG_READ_APNG_SUPPORTED)
-+/* This function is to be called after the main IDAT set has been read and
-+ * before a new IDAT is read. It resets some parts of png_ptr
-+ * to make them usable by the read functions again */
-+void /* PRIVATE */
-+png_read_reset(png_structp png_ptr)
-+{
-+    png_ptr->mode &= ~PNG_HAVE_IDAT;
-+    png_ptr->mode &= ~PNG_AFTER_IDAT;
-+    png_ptr->row_number = 0;
-+    png_ptr->pass = 0;
-+    png_ptr->flags &= ~PNG_FLAG_ROW_INIT;
-+}
-+
-+void /* PRIVATE */
-+png_read_reinit(png_structp png_ptr, png_infop info_ptr)
-+{
-+    png_ptr->width = info_ptr->next_frame_width;
-+    png_ptr->height = info_ptr->next_frame_height;
-+    png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->width);
-+}
-+
-+/* same as png_read_reset() but for the progressive reader */
-+void /* PRIVATE */
-+png_progressive_read_reset(png_structp png_ptr)
-+{
-+#ifdef PNG_USE_LOCAL_ARRAYS
-+    /* start of interlace block */
-+    const int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0};
-+
-+    /* offset to next interlace block */
-+    const int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1};
-+
-+    /* start of interlace block in the y direction */
-+    const int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1};
-+
-+    /* offset to next interlace block in the y direction */
-+    const int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2};
-+#endif
-+    png_uint_32 row_bytes;
-+    
-+    if (png_ptr->interlaced)
-+    {
-+        if (!(png_ptr->transformations & PNG_INTERLACE))
-+            png_ptr->num_rows = (png_ptr->height + png_pass_yinc[0] - 1 -
-+                                png_pass_ystart[0]) / png_pass_yinc[0];
-+        else
-+           png_ptr->num_rows = png_ptr->height;
-+
-+        png_ptr->iwidth = (png_ptr->width +
-+                           png_pass_inc[png_ptr->pass] - 1 -
-+                           png_pass_start[png_ptr->pass]) /
-+                           png_pass_inc[png_ptr->pass];
-+
-+        row_bytes = PNG_ROWBYTES(png_ptr->pixel_depth,png_ptr->iwidth) + 1;
-+
-+        png_ptr->irowbytes = (png_size_t)row_bytes;
-+        if((png_uint_32)png_ptr->irowbytes != row_bytes)
-+            png_error(png_ptr, "png_progressive_read_reset(): Rowbytes "
-+                               "overflow");
-+    }
-+    else
-+    {
-+        png_ptr->num_rows = png_ptr->height;
-+        png_ptr->iwidth = png_ptr->width;
-+        png_ptr->irowbytes = png_ptr->rowbytes + 1;
-+    }
-+    
-+    png_ptr->flags &= ~PNG_FLAG_ZLIB_FINISHED;
-+    if (inflateReset(&(png_ptr->zstream)) != Z_OK)
-+        png_error(png_ptr, "inflateReset failed");
-+    png_ptr->zstream.avail_in = 0;
-+    png_ptr->zstream.next_in = 0;
-+    png_ptr->zstream.next_out = png_ptr->row_buf;
-+    png_ptr->zstream.avail_out = (uInt)png_ptr->irowbytes;
-+}
-+#endif /* PNG_READ_APNG_SUPPORTED */
- #endif /* PNG_READ_SUPPORTED */
-Index: pngwutil.c
-===================================================================
---- pngwutil.c	(révision 149)
-+++ pngwutil.c	(copie de travail)
-@@ -506,6 +506,11 @@
-    /* write the chunk */
-    png_write_chunk(png_ptr, (png_bytep)png_IHDR, buf, (png_size_t)13);
- 
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   png_ptr->first_frame_width = width;
-+   png_ptr->first_frame_height = height;
-+#endif
-+
-    /* initialize zlib with PNG info */
-    png_ptr->zstream.zalloc = png_zalloc;
-    png_ptr->zstream.zfree = png_zfree;
-@@ -628,6 +633,9 @@
- {
- #ifdef PNG_USE_LOCAL_ARRAYS
-    PNG_IDAT;
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   PNG_fdAT;
-+#endif
- #endif
-    png_debug(1, "in png_write_IDAT\n");
- 
-@@ -670,7 +678,28 @@
-             "Invalid zlib compression method or flags in IDAT");
-    }
- 
--   png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length);
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   if(png_ptr->num_frames_written == 0)
-+#endif
-+      png_write_chunk(png_ptr, (png_bytep)png_IDAT, data, length);
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+   else
-+   {
-+      png_byte buf[4];
-+      
-+      png_write_chunk_start(png_ptr, (png_bytep)png_fdAT, 4 + length);
-+      
-+      png_save_uint_32(buf, png_ptr->next_seq_num);
-+      png_write_chunk_data(png_ptr, buf, 4);
-+      
-+      png_write_chunk_data(png_ptr, data, length);
-+      
-+      png_write_chunk_end(png_ptr);
-+      
-+      png_ptr->next_seq_num++;
-+   }
-+#endif
-+
-    png_ptr->mode |= PNG_HAVE_IDAT;
- }
- 
-@@ -1755,6 +1784,70 @@
- }
- #endif
- 
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+void /* PRIVATE */
-+png_write_acTL(png_structp png_ptr,
-+   png_uint_32 num_frames, png_uint_32 num_plays)
-+{
-+#ifdef PNG_USE_LOCAL_ARRAYS
-+    PNG_acTL;
-+#endif
-+    png_byte data[16];
-+    
-+    png_debug(1, "in png_write_acTL\n");
-+    
-+    png_ptr->num_frames_to_write = num_frames;
-+    
-+    if (png_ptr->apng_flags & PNG_FIRST_FRAME_HIDDEN)
-+        num_frames--;
-+    
-+    png_save_uint_32(data, num_frames);
-+    png_save_uint_32(data + 4, num_plays);
-+    
-+    png_write_chunk(png_ptr, (png_bytep)png_acTL, data, (png_size_t)8);
-+}
-+
-+void /* PRIVATE */
-+png_write_fcTL(png_structp png_ptr, png_uint_32 width, png_uint_32 height, 
-+    png_uint_32 x_offset, png_uint_32 y_offset,
-+    png_uint_16 delay_num, png_uint_16 delay_den, png_byte dispose_op, 
-+    png_byte blend_op)
-+{
-+#ifdef PNG_USE_LOCAL_ARRAYS
-+    PNG_fcTL;
-+#endif
-+    png_byte data[26];
-+    
-+    png_debug(1, "in png_write_fcTL\n");
-+    
-+    if (png_ptr->num_frames_written == 0 && (x_offset != 0 || y_offset != 0))
-+        png_error(png_ptr, "x and/or y offset for the first frame aren't 0\n");
-+    if (png_ptr->num_frames_written == 0 && 
-+        (width != png_ptr->first_frame_width || 
-+         height != png_ptr->first_frame_height))
-+        png_error(png_ptr, "width and/or height in the first frame's fcTL "
-+                           "don't match the ones in IHDR\n");
-+    
-+    /* more error checking */
-+    png_ensure_fcTL_is_valid(png_ptr, width, height, x_offset, y_offset, 
-+                             delay_num, delay_den, dispose_op, blend_op);
-+    
-+    png_save_uint_32(data, png_ptr->next_seq_num);
-+    png_save_uint_32(data + 4, width);
-+    png_save_uint_32(data + 8, height);
-+    png_save_uint_32(data + 12, x_offset);
-+    png_save_uint_32(data + 16, y_offset);
-+    png_save_uint_16(data + 20, delay_num);
-+    png_save_uint_16(data + 22, delay_den);
-+    data[24] = dispose_op;
-+    data[25] = blend_op;
-+    
-+    png_write_chunk(png_ptr, (png_bytep)png_fcTL, data, (png_size_t)26);
-+    
-+    png_ptr->next_seq_num++;
-+}
-+#endif /* PNG_WRITE_APNG_SUPPORTED */
-+
- /* initializes the row writing capability of libpng */
- void /* PRIVATE */
- png_write_start_row(png_structp png_ptr)
-@@ -2824,4 +2917,39 @@
-    }
- #endif
- }
-+
-+#if defined(PNG_WRITE_APNG_SUPPORTED)
-+void /* PRIVATE */
-+png_write_reset(png_structp png_ptr)
-+{
-+    png_ptr->row_number = 0;
-+    png_ptr->pass = 0;
-+    png_ptr->mode &= ~PNG_HAVE_IDAT;
-+}
-+
-+void /* PRIVATE */
-+png_write_reinit(png_structp png_ptr, png_infop info_ptr, 
-+                 png_uint_32 width, png_uint_32 height)
-+{
-+    if (png_ptr->num_frames_written == 0 && 
-+        (width != png_ptr->first_frame_width || 
-+         height != png_ptr->first_frame_height))
-+        png_error(png_ptr, "width and/or height in the first frame's fcTL "
-+                           "don't match the ones in IHDR\n");
-+    if (width > png_ptr->first_frame_width || 
-+        height > png_ptr->first_frame_height)
-+        png_error(png_ptr, "width and/or height for a frame greater than"
-+                           "the ones in IHDR");
-+    
-+    png_set_IHDR(png_ptr, info_ptr, width, height, 
-+                 info_ptr->bit_depth, info_ptr->color_type, 
-+                 info_ptr->interlace_type, info_ptr->compression_type,
-+                 info_ptr->filter_type);
-+   
-+    png_ptr->width = width;
-+    png_ptr->height = height;
-+    png_ptr->rowbytes = PNG_ROWBYTES(png_ptr->pixel_depth, width);
-+    png_ptr->usr_width = png_ptr->width;
-+}
-+#endif
- #endif /* PNG_WRITE_SUPPORTED */
-Index: pngrtran.c
-===================================================================
---- pngrtran.c	(révision 149)
-+++ pngrtran.c	(copie de travail)
-@@ -1293,7 +1293,7 @@
-        * or png_read_update_info() after setting transforms that expand
-        * pixels.  This check added to libpng-1.2.19 */
- #if (PNG_WARN_UNINITIALIZED_ROW==1)
--      png_error(png_ptr, "Uninitialized row");
-+      png_warning(png_ptr, "Uninitialized row");
- #else
-       png_warning(png_ptr, "Uninitialized row");
- #endif