typedef struct { int r; int g; int b; int a; } MT_COLOR; #define mt_color_set(c, red, green, blue) #define mt_color_set(c, red, green, blue, alpha) void mt_color_get_hsv(MT_COLOR *col, int *h, int *s, int *v); void mt_color_set_hsv(MT_COLOR *result, int h, int s, int v); void mt_color_light(MT_COLOR *result, MT_COLOR *col, int factor); void mt_color_dark(MT_COLOR *result, MT_COLOR *col, int factor);