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#include "color.h"
namespace kms
{
RGB::RGB()
{
r = g = b = a = 0;
}
RGB::RGB(uint8_t r, uint8_t g, uint8_t b)
{
this->r = r;
this->g = g;
this->b = b;
this->a = 0;
}
uint16_t RGB::rgb565() const
{
uint16_t r = (this->r >> 3) << 11;
uint16_t g = (this->g >> 2) << 5;
uint16_t b = (this->b >> 3) << 0;
return r | g | b;
}
YUV RGB::yuv() const
{
return YUV(*this);
}
YUV::YUV()
{
y = u = v = a = 0;
}
YUV::YUV(uint8_t y, uint8_t u, uint8_t v)
{
this->y = y;
this->u = u;
this->v = v;
this->a = 0;
}
static inline uint8_t MAKE_YUV_601_Y(uint8_t r, uint8_t g, uint8_t b)
{
return (((66 * r + 129 * g + 25 * b + 128) >> 8) + 16);
}
static inline uint8_t MAKE_YUV_601_U(uint8_t r, uint8_t g, uint8_t b)
{
return (((-38 * r - 74 * g + 112 * b + 128) >> 8) + 128);
}
static inline uint8_t MAKE_YUV_601_V(uint8_t r, uint8_t g, uint8_t b)
{
return (((112 * r - 94 * g - 18 * b + 128) >> 8) + 128);
}
YUV::YUV(const RGB& rgb)
{
this->y = MAKE_YUV_601_Y(rgb.r, rgb.g, rgb.b);
this->u = MAKE_YUV_601_U(rgb.r, rgb.g, rgb.b);
this->v = MAKE_YUV_601_V(rgb.r, rgb.g, rgb.b);
this->a = rgb.a;
}
}
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