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#ifndef _RAY_GAMMA_H
#define _RAY_GAMMA_H
#include <stdint.h>
#include "ray_color.h"
typedef struct ray_gamma_t {
float gamma;
uint8_t table[1024];
} ray_gamma_t;
void ray_gamma_prepare(float gamma, ray_gamma_t *res_gamma);
/* convert a color into a gamma-corrected, packed, 32-bit rgb pixel value */
static inline uint32_t ray_gamma_color_to_uint32_rgb(ray_gamma_t *gamma, ray_color_t color) {
uint32_t pixel;
if (color.x > 1.0f)
color.x = 1.0f;
if (color.y > 1.0f)
color.y = 1.0f;
if (color.z > 1.0f)
color.z = 1.0f;
pixel = (uint32_t)gamma->table[(unsigned)floorf(1023.0f * color.x)];
pixel <<= 8;
pixel |= (uint32_t)gamma->table[(unsigned)floorf(1023.0f * color.y)];
pixel <<= 8;
pixel |= (uint32_t)gamma->table[(unsigned)floorf(1023.0f * color.z)];
return pixel;
}
#endif
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