diff -Nur libpng-1.2.44.orig/png.c libpng-1.2.44/png.c
--- libpng-1.2.44.orig/png.c	2010-06-26 02:31:14.000000000 +0200
+++ libpng-1.2.44/png.c	2010-07-08 21:21:33.745873377 +0200
@@ -56,6 +56,11 @@
 PNG_tIME;
 PNG_tRNS;
 PNG_zTXt;
+#ifdef PNG_APNG_SUPPORTED
+PNG_acTL;
+PNG_fcTL;
+PNG_fdAT;
+#endif
 
 #ifdef PNG_READ_SUPPORTED
 /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */
diff -Nur libpng-1.2.44.orig/pngconf.h libpng-1.2.44/pngconf.h
--- libpng-1.2.44.orig/pngconf.h	2010-06-26 02:31:14.000000000 +0200
+++ libpng-1.2.44/pngconf.h	2010-07-08 21:21:33.906029659 +0200
@@ -951,6 +951,10 @@
 #  define PNG_NO_READ_tEXt
 #  define PNG_NO_READ_zTXt
 #endif
+#ifndef PNG_NO_READ_APNG
+#  define PNG_READ_APNG_SUPPORTED
+#  define PNG_APNG_SUPPORTED
+#endif
 #ifndef PNG_NO_READ_bKGD
 #  define PNG_READ_bKGD_SUPPORTED
 #  define PNG_bKGD_SUPPORTED
@@ -1177,6 +1181,14 @@
 #    define PNG_TEXT_SUPPORTED
 #  endif
 #endif
+#ifndef PNG_NO_WRITE_APNG
+#  ifndef PNG_WRITE_APNG_SUPPORTED
+#    define PNG_WRITE_APNG_SUPPORTED
+#  endif
+#  ifndef PNG_APNG_SUPPORTED
+#    define PNG_APNG_SUPPORTED
+#  endif
+#endif
 
 #ifdef PNG_WRITE_tIME_SUPPORTED
 #  ifndef PNG_NO_CONVERT_tIME
diff -Nur libpng-1.2.44.orig/pngget.c libpng-1.2.44/pngget.c
--- libpng-1.2.44.orig/pngget.c	2010-06-26 02:31:14.000000000 +0200
+++ libpng-1.2.44/pngget.c	2010-07-08 21:21:33.676118515 +0200
@@ -842,6 +842,167 @@
 }
 #endif
 
+#ifdef PNG_APNG_SUPPORTED
+png_uint_32 PNGAPI
+png_get_acTL(png_structp png_ptr, png_infop info_ptr,
+             png_uint_32 *num_frames, png_uint_32 *num_plays)
+{
+    png_debug1(1, "in %s retrieval function", "acTL");
+    
+    if (png_ptr != NULL && info_ptr != NULL &&
+        (info_ptr->valid & PNG_INFO_acTL) &&
+        num_frames != NULL && num_plays != NULL)
+    {
+        *num_frames = info_ptr->num_frames;
+        *num_plays = info_ptr->num_plays;
+        return (1);
+    }
+    
+    return (0);
+}
+
+png_uint_32 PNGAPI
+png_get_num_frames(png_structp png_ptr, png_infop info_ptr)
+{
+    png_debug(1, "in png_get_num_frames()");
+    
+    if (png_ptr != NULL && info_ptr != NULL)
+        return (info_ptr->num_frames);
+    return (0);
+}
+
+png_uint_32 PNGAPI
+png_get_num_plays(png_structp png_ptr, png_infop info_ptr)
+{
+    png_debug(1, "in png_get_num_plays()");
+    
+    if (png_ptr != NULL && info_ptr != NULL)
+        return (info_ptr->num_plays);
+    return (0);
+}
+
+png_uint_32 PNGAPI
+png_get_next_frame_fcTL(png_structp png_ptr, png_infop info_ptr,
+             png_uint_32 *width, png_uint_32 *height,
+             png_uint_32 *x_offset, png_uint_32 *y_offset,
+             png_uint_16 *delay_num, png_uint_16 *delay_den,
+             png_byte *dispose_op, png_byte *blend_op)
+{
+    png_debug1(1, "in %s retrieval function", "fcTL");
+    
+    if (png_ptr != NULL && info_ptr != NULL &&
+        (info_ptr->valid & PNG_INFO_fcTL) &&
+        width != NULL && height != NULL && 
+        x_offset != NULL && x_offset != NULL && 
+        delay_num != NULL && delay_den != NULL &&
+        dispose_op != NULL && blend_op != NULL)
+    {
+        *width = info_ptr->next_frame_width;
+        *height = info_ptr->next_frame_height;
+        *x_offset = info_ptr->next_frame_x_offset;
+        *y_offset = info_ptr->next_frame_y_offset;
+        *delay_num = info_ptr->next_frame_delay_num;
+        *delay_den = info_ptr->next_frame_delay_den;
+        *dispose_op = info_ptr->next_frame_dispose_op;
+        *blend_op = info_ptr->next_frame_blend_op;
+        return (1);
+    }
+    
+    return (0);
+}
+
+png_uint_32 PNGAPI
+png_get_next_frame_width(png_structp png_ptr, png_infop info_ptr)
+{
+    png_debug(1, "in png_get_next_frame_width()");
+    
+    if (png_ptr != NULL && info_ptr != NULL)
+        return (info_ptr->next_frame_width);
+    return (0);
+}
+
+png_uint_32 PNGAPI
+png_get_next_frame_height(png_structp png_ptr, png_infop info_ptr)
+{
+    png_debug(1, "in png_get_next_frame_height()");
+    
+    if (png_ptr != NULL && info_ptr != NULL)
+        return (info_ptr->next_frame_height);
+    return (0);
+}
+
+png_uint_32 PNGAPI
+png_get_next_frame_x_offset(png_structp png_ptr, png_infop info_ptr)
+{
+    png_debug(1, "in png_get_next_frame_x_offset()");
+    
+    if (png_ptr != NULL && info_ptr != NULL)
+