ptk/include/ptk_color.h

#ifndef PTK_PTK_COLOR_H_
#define PTK_PTK_COLOR_H_

typedef union {
    struct {
        float r;
        float g;
        float b;
    };
    struct {
        float red;
        float green;
        float blue;
    };
} PtkRGB;

typedef union {
    struct {
        float r;
        float g;
        float b;
        float a;
    };
    struct {
        float red;
        float green;
        float blue;
        float alpha;
    };
} PtkRGBA;

// all values in range [0.0, 360.0]
typedef union {
    struct {
        float h;
        float s;
        float v;
    };
    struct {
        float hue;
        float saturation;
        float value;
    };
} PtkHSV;

typedef union {
    struct {
        float h;
        float s;
        float v;
        float a;
    };
    struct {
        float hue;
        float saturation;
        float value;
        float alpha;
    };
} PtkHSVA;

PtkHSV ptk_rgb_to_hsv(const PtkRGB rgb);
PtkRGB ptk_hsv_to_rgb(const PtkHSV hsv);

PtkHSVA ptk_rgba_to_hsva(const PtkRGBA rgba);
PtkRGBA ptk_hsva_to_rgba(const PtkHSVA hsva);

#endif // PTK_PTK_COLOR_H_