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sw_engine: ++alpha blending operation.

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Reduce instructions, improving its performance by ~15%
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Hermet Park 2024-07-17 17:03:38 +09:00 • committed by Hermet Park
parent 83439f34e1
commit c825c2f929
1 changed files with 2 additions and 2 deletions
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4
src/renderer/sw_engine/tvgSwCommon.h
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@ -297,8 +297,8 @@ static inline uint32_t JOIN(uint8_t c0, uint8_t c1, uint8_t c2, uint8_t c3)
static inline uint32_t ALPHA_BLEND(uint32_t c, uint32_t a)
{
return (((((c >> 8) & 0x00ff00ff) * a + 0x00ff00ff) & 0xff00ff00) +
((((c & 0x00ff00ff) * a + 0x00ff00ff) >> 8) & 0x00ff00ff));
++a;
return (((((c >> 8) & 0x00ff00ff) * a) & 0xff00ff00) + ((((c & 0x00ff00ff) * a) >> 8) & 0x00ff00ff));
}
static inline uint32_t INTERPOLATE(uint32_t s, uint32_t d, uint8_t a)