From ab9ce191707b23694b98d730fd28e8ddb940ec2b Mon Sep 17 00:00:00 2001
From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Sat, 14 Oct 2006 12:23:54 +0000
Subject: [PATCH] Make PNG produce correct 8-bit pictures
Originally committed as revision 6689 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
libavcodec/png.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/png.c b/libavcodec/png.c
index 0dd9eaec23f..6d588c35a88 100644
--- a/libavcodec/png.c
+++ b/libavcodec/png.c
@@ -850,7 +850,7 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size,
for(i = 0; i < 256; i++) {
v = palette[i];
alpha = v >> 24;
- if (alpha != 0xff)
+ if (alpha && alpha != 0xff)
has_alpha = 1;
*alpha_ptr++ = alpha;
ptr[0] = v >> 16;
--
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