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avfilter/xbr: refactor alpha blending macros

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This commit is contained in:
Clément Bœsch 2014-11-16 11:55:08 +01:00
parent 8706910c4c
commit 2188df96cf
1 changed files with 6 additions and 20 deletions
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26
libavfilter/vf_xbr.c
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@ -76,26 +76,12 @@ static uint32_t pixel_diff(uint32_t x, uint32_t y, const uint32_t *r2y)
}
#define ALPHA_BLEND_128_W(dst, src) dst = ((src & LB_MASK) >> 1) + ((dst & LB_MASK) >> 1)
#define ALPHA_BLEND_32_W(dst, src) \
dst = ((RED_BLUE_MASK & ((dst & RED_BLUE_MASK) + ((((src & RED_BLUE_MASK) - \
(dst & RED_BLUE_MASK))) >> 3))) | (GREEN_MASK & ((dst & GREEN_MASK) + \
((((src & GREEN_MASK) - (dst & GREEN_MASK))) >> 3))))
#define ALPHA_BLEND_64_W(dst, src) \
dst = ((RED_BLUE_MASK & ((dst & RED_BLUE_MASK) + ((((src & RED_BLUE_MASK) - \
(dst & RED_BLUE_MASK))) >> 2))) | (GREEN_MASK & ((dst & GREEN_MASK) + \
((((src & GREEN_MASK) - (dst & GREEN_MASK))) >> 2))))
#define ALPHA_BLEND_192_W(dst, src) \
dst = ((RED_BLUE_MASK & ((dst & RED_BLUE_MASK) + ((((src & RED_BLUE_MASK) - \
(dst & RED_BLUE_MASK)) * 3) >> 2))) | (GREEN_MASK & ((dst & GREEN_MASK) + \
((((src & GREEN_MASK) - (dst & GREEN_MASK)) * 3) >> 2))))
#define ALPHA_BLEND_224_W(dst, src) \
dst = ((RED_BLUE_MASK & ((dst & RED_BLUE_MASK) + ((((src & RED_BLUE_MASK) - \
(dst & RED_BLUE_MASK)) * 7) >> 3))) | (GREEN_MASK & ((dst & GREEN_MASK) + \
((((src & GREEN_MASK) - (dst & GREEN_MASK)) * 7) >> 3))))
#define ALPHA_BLEND_BASE(a, b, m, s) ( (RED_BLUE_MASK & (((a) & RED_BLUE_MASK) + (((((b) & RED_BLUE_MASK) - ((a) & RED_BLUE_MASK)) * (m)) >> (s)))) \
| (GREEN_MASK & (((a) & GREEN_MASK) + (((((b) & GREEN_MASK) - ((a) & GREEN_MASK)) * (m)) >> (s)))))
#define ALPHA_BLEND_32_W(dst, src) dst = ALPHA_BLEND_BASE(dst, src, 1, 3)
#define ALPHA_BLEND_64_W(dst, src) dst = ALPHA_BLEND_BASE(dst, src, 1, 2)
#define ALPHA_BLEND_192_W(dst, src) dst = ALPHA_BLEND_BASE(dst, src, 3, 2)
#define ALPHA_BLEND_224_W(dst, src) dst = ALPHA_BLEND_BASE(dst, src, 7, 3)
#define df(A, B) pixel_diff(A, B, r2y)
#define eq(A, B) (df(A, B) < 155)