mirror of https://git.ffmpeg.org/ffmpeg.git
fix chroma alpha in the drawtext filter
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
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@ -375,9 +375,8 @@ static int config_input(AVFilterLink *inlink)
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chroma_pos2 = ((x) >> (hsub)) + ((y) >> (vsub)) * picref->linesize[2]; \
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alpha = (yuva_color[3] * (val)) / 255; \
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picref->data[0][luma_pos] = (alpha * yuva_color[0] + (255 - alpha) * picref->data[0][luma_pos]) >> 8; \
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alpha = (yuva_color[3] * (val)) / 224; \
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picref->data[1][chroma_pos1] = (alpha * yuva_color[1] + (224 - alpha) * picref->data[1][chroma_pos1]) / 224; \
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picref->data[2][chroma_pos2] = (alpha * yuva_color[2] + (224 - alpha) * picref->data[2][chroma_pos2]) / 224; \
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picref->data[1][chroma_pos1] = (alpha * yuva_color[1] + (255 - alpha) * picref->data[1][chroma_pos1]) >> 8; \
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picref->data[2][chroma_pos2] = (alpha * yuva_color[2] + (255 - alpha) * picref->data[2][chroma_pos2]) >> 8; \
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}
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static inline int draw_glyph_yuv(AVFilterBufferRef *picref, FT_Bitmap *bitmap, unsigned int x,
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