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Better gamma curve

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This commit is contained in:
whowechina 2022-09-11 23:39:38 +08:00
parent 16ec7d52e3
commit be42bcf87d
1 changed files with 5 additions and 2 deletions
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7
FIRMWARE/src/rgb.c
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@ -30,10 +30,13 @@ static inline void put_pixel(uint32_t pixel_grb)
static inline uint32_t urgb_u32(uint8_t r, uint8_t g, uint8_t b)
{
return ((uint32_t)r << 8) | ((uint32_t)g << 16) | (uint32_t)b;
/* better gamma curve */
uint32_t r32 = (uint32_t)r * r;
uint32_t g32 = (uint32_t)g * g;
uint32_t b32 = (uint32_t)b * b;
return (b32 >> 8 << 16) | (g32 >> 8 << 8) | (r32 >> 8 << 0);
}
/* 6 segment regular hsv color wheel, better color cycle
* https://www.arnevogel.com/rgb-rainbow/
* https://www.instructables.com/How-to-Make-Proper-Rainbow-and-Random-Colors-With-/