Do not ignore full transparency when writing png palette.

This reverts r6689, "Make PNG produce correct 8-bit pictures".
13 years ago · a99dbe014d
parent 901af94b69
commit a99dbe014d
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/pngenc.c
+++ b/libavcodec/pngenc.c
@ -336,7 +336,7 @@ 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 && alpha != 0xff)
+            if (alpha != 0xff)
                has_alpha = 1;
            *alpha_ptr++ = alpha;
            bytestream_put_be24(&ptr, v);