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ffmpeg.wasm-core
Commit edbaedf7 authored by Michael Niedermayer's avatar Michael Niedermayer
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Simplify chroma blend in the drawtext filter 

Signed-off-by: 's avatarMichael Niedermayer <michaelni@gmx.at>
parent bd8e7503
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libavfilter/vf_drawtext.c
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...@@ -376,8 +376,8 @@ static int config_input(AVFilterLink *inlink) ...@@ -376,8 +376,8 @@ static int config_input(AVFilterLink *inlink)
alpha = (yuva_color[3] * (val)) / 255; \ alpha = (yuva_color[3] * (val)) / 255; \
picref->data[0][luma_pos] = (alpha * yuva_color[0] + (255 - alpha) * picref->data[0][luma_pos]) >> 8; \ picref->data[0][luma_pos] = (alpha * yuva_color[0] + (255 - alpha) * picref->data[0][luma_pos]) >> 8; \
alpha = (yuva_color[3] * (val)) / 224; \ alpha = (yuva_color[3] * (val)) / 224; \
picref->data[1][chroma_pos1] = 16 + (alpha * (yuva_color[1]-16) + (224 - alpha) * (picref->data[1][chroma_pos1]-16)) / 224; \ picref->data[1][chroma_pos1] = (alpha * yuva_color[1] + (224 - alpha) * picref->data[1][chroma_pos1]) / 224; \
picref->data[2][chroma_pos2] = 16 + (alpha * (yuva_color[2]-16) + (224 - alpha) * (picref->data[2][chroma_pos2]-16)) / 224; \ picref->data[2][chroma_pos2] = (alpha * yuva_color[2] + (224 - alpha) * picref->data[2][chroma_pos2]) / 224; \
} }
static inline int draw_glyph_yuv(AVFilterBufferRef *picref, FT_Bitmap *bitmap, unsigned int x, static inline int draw_glyph_yuv(AVFilterBufferRef *picref, FT_Bitmap *bitmap, unsigned int x,
......
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