Created
October 4, 2011 12:48
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Pixel Magnitude function
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| #define SLICE(value, shift) (int16_t)((value & (0xff << shift)) >> shift) | |
| static inline uint32_t pixel_magnitude(uint32 pixel, uint32 color) { | |
| int16_t r = SLICE(pixel, 24) - SLICE(color, 24); | |
| int16_t g = SLICE(pixel, 16) - SLICE(color, 16); | |
| int16_t b = SLICE(pixel, 8) - SLICE(color, 8); | |
| return (r*r+g*g+b*b); | |
| } | |
| #undef SLICE |
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