27 lines
610 B
C
27 lines
610 B
C
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#ifndef __BLURHASH_COMMON_H__
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#define __BLURHASH_COMMON_H__
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#include<math.h>
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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static inline int linearTosRGB(float value) {
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float v = fmaxf(0, fminf(1, value));
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if(v <= 0.0031308) return v * 12.92 * 255 + 0.5;
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else return (1.055 * powf(v, 1 / 2.4) - 0.055) * 255 + 0.5;
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}
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static inline float sRGBToLinear(int value) {
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float v = (float)value / 255;
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if(v <= 0.04045) return v / 12.92;
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else return powf((v + 0.055) / 1.055, 2.4);
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}
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static inline float signPow(float value, float exp) {
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return copysignf(powf(fabsf(value), exp), value);
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}
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#endif
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