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| author | Michael Niedermayer <michaelni@gmx.at> | 2011-02-22 00:28:54 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2011-02-22 01:49:54 +0100 |
| commit | 476aaec63729a306d1759f14c74847ca8f0b2021 (patch) | |
| tree | 392a24b58d7f46502fc51527b5eef216c8a66410 | |
| parent | edbaedf7a0c4cf2c41daf8259c617664b1c8b4f5 (diff) | |
| download | ffmpeg-476aaec63729a306d1759f14c74847ca8f0b2021.tar.gz | |
fix chroma alpha in the drawtext filter
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavfilter/vf_drawtext.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/libavfilter/vf_drawtext.c b/libavfilter/vf_drawtext.c index d470c89310..ec83ac0b4a 100644 --- a/libavfilter/vf_drawtext.c +++ b/libavfilter/vf_drawtext.c @@ -375,9 +375,8 @@ static int config_input(AVFilterLink *inlink) chroma_pos2 = ((x) >> (hsub)) + ((y) >> (vsub)) * picref->linesize[2]; \ alpha = (yuva_color[3] * (val)) / 255; \ picref->data[0][luma_pos] = (alpha * yuva_color[0] + (255 - alpha) * picref->data[0][luma_pos]) >> 8; \ - alpha = (yuva_color[3] * (val)) / 224; \ - picref->data[1][chroma_pos1] = (alpha * yuva_color[1] + (224 - alpha) * picref->data[1][chroma_pos1]) / 224; \ - picref->data[2][chroma_pos2] = (alpha * yuva_color[2] + (224 - alpha) * picref->data[2][chroma_pos2]) / 224; \ + picref->data[1][chroma_pos1] = (alpha * yuva_color[1] + (255 - alpha) * picref->data[1][chroma_pos1]) >> 8; \ + picref->data[2][chroma_pos2] = (alpha * yuva_color[2] + (255 - alpha) * picref->data[2][chroma_pos2]) >> 8; \ } static inline int draw_glyph_yuv(AVFilterBufferRef *picref, FT_Bitmap *bitmap, unsigned int x, |