From 488285e510fa41b3cce9b50b1725b1cfe2f79d41 Mon Sep 17 00:00:00 2001
From: james <justsomejames2@gmail.com>
Date: Sat, 16 Feb 2019 14:20:55 -0800
Subject: [PATCH] Support libpng without the apng patch and fix mingw (?)
 compiler errors

---
 src/apng.c | 23 +++++++++++++++++++++--
 src/apng.h | 16 ++++++++++++++++
 2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/src/apng.c b/src/apng.c
index 2109c0a07..da8140e08 100644
--- a/src/apng.c
+++ b/src/apng.c
@@ -25,6 +25,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "apng.h"
 
+#define APNG_INFO_acTL 0x20000U
+
 #define APNG_WROTE_acTL 0x10000U
 
 struct apng_info_def
@@ -59,6 +61,10 @@ size_t apng_default_tell  (png_structp);
 #endif/* PNG_STDIO_SUPPORTED */
 void   apng_write_IEND (png_structp);
 void   apng_write_acTL (png_structp, png_uint_32, png_uint_32);
+#ifndef PNG_WRITE_APNG_SUPPORTED
+void   apng_set_acTL_dummy (png_structp, png_infop, apng_infop,
+		png_uint_32, png_uint_32);
+#endif/* PNG_WRITE_APNG_SUPPORTED */
 
 apng_infop
 apng_create_info_struct (png_structp pngp)
@@ -204,7 +210,7 @@ apng_set_acTL (png_structp pngp, png_infop infop, apng_infop ainfop,
 	ainfop->num_frames = frames;
 	ainfop->num_plays  = plays;
 
-	ainfop->valid |= PNG_INFO_acTL;
+	ainfop->valid |= APNG_INFO_acTL;
 
 	return 1;
 }
@@ -218,7 +224,7 @@ apng_write_info_before_PLTE (png_structp pngp, png_infop infop,
 
 	png_write_info_before_PLTE(pngp, infop);
 
-	if (( ainfop->valid & PNG_INFO_acTL ) &&!( ainfop->mode & APNG_WROTE_acTL ))
+	if (( ainfop->valid & APNG_INFO_acTL )&&!( ainfop->mode & APNG_WROTE_acTL ))
 	{
 		ainfop->start_acTL = apng_tell(pngp, ainfop);
 
@@ -253,6 +259,19 @@ apng_write_end (png_structp pngp, png_infop infop, apng_infop ainfop)
 #endif/* PNG_WRITE_FLUSH_AFTER_IEND_SUPPORTED */
 }
 
+#ifndef PNG_WRITE_APNG_SUPPORTED
+void
+apng_set_acTL_dummy (png_structp pngp, png_infop infop, apng_infop ainfop,
+		png_uint_32 frames, png_uint_32 plays)
+{
+	(void)pngp;
+	(void)infop;
+	(void)ainfop;
+	(void)frames;
+	(void)plays;
+}
+#endif/* PNG_WRITE_APNG_SUPPORTED */
+
 /* Dynamic runtime linking capable! (Hopefully.) */
 void
 apng_set_set_acTL_fn (png_structp pngp, apng_infop ainfop,
diff --git a/src/apng.h b/src/apng.h
index eefd6aaa3..aa7fac3df 100644
--- a/src/apng.h
+++ b/src/apng.h
@@ -23,6 +23,22 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef APNG_H
 #define APNG_H
 
+#ifndef _MSC_VER
+#ifndef _WII
+#ifndef _LARGEFILE64_SOURCE
+#define _LARGEFILE64_SOURCE
+#endif
+#endif
+#endif
+
+#ifndef _LFS64_LARGEFILE
+#define _LFS64_LARGEFILE
+#endif
+
+#ifndef _FILE_OFFSET_BITS
+#define _FILE_OFFSET_BITS 0
+#endif
+
 #include <png.h>
 
 typedef struct apng_info_def apng_info;