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Code Issues Releases Activity

avfilter/vf_paletteuse: do not use in dithering transparent palette

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This commit is contained in:
Paul B Mahol 2021-08-19 09:40:14 +02:00
parent 6d09de90d1
commit 79934cc702
1 changed files with 7 additions and 3 deletions
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10
libavfilter/vf_paletteuse.c
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@ -380,9 +380,13 @@ static av_always_inline int get_dst_color_err(PaletteUseContext *s,
if (dstx < 0) if (dstx < 0)
return dstx; return dstx;
dstc = s->palette[dstx]; dstc = s->palette[dstx];
*er = (int)r - (int)(dstc >> 16 & 0xff); if (dstx == s->transparency_index) {
*eg = (int)g - (int)(dstc >> 8 & 0xff); *er = *eg = *eb = 0;
*eb = (int)b - (int)(dstc & 0xff); } else {
*er = (int)r - (int)(dstc >> 16 & 0xff);
*eg = (int)g - (int)(dstc >> 8 & 0xff);
*eb = (int)b - (int)(dstc & 0xff);
}
return dstx; return dstx;
} }