Color.hpp

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#pragma once
 
#include "AstGlobal.h"
#include <stdint.h>
 
AST_NAMESPACE_BEGIN
 
typedef uint32_t color_t;
 
 
constexpr inline color_t rgb(uint8_t r, uint8_t g, uint8_t b)
{
    return (r << 24) | (g << 16) | (b << 8) | 0xFF;
}
 
constexpr inline color_t rgba(uint8_t r, uint8_t g, uint8_t b, uint8_t a)
{
    return (r << 24) | (g << 16) | (b << 8) | a;
}
 
A_CONSTEXPR_CXX14 inline void aColorToRGB(color_t color, uint8_t& r, uint8_t& g, uint8_t& b) noexcept
{
    r = (color >> 24) & 0xFF;
    g = (color >> 16) & 0xFF;
    b = (color >> 8) & 0xFF;
}
 
A_CONSTEXPR_CXX14 inline void aColorToRGBA(color_t color, uint8_t& r, uint8_t& g, uint8_t& b, uint8_t& a) noexcept
{
    r = (color >> 24) & 0xFF;
    g = (color >> 16) & 0xFF;
    b = (color >> 8) & 0xFF;
    a = color & 0xFF;
}
 
 
class Color
{
public:
    constexpr Color() noexcept: value_(0) {}
    constexpr Color(color_t value) noexcept: value_(value) {}
    constexpr Color(uint8_t r, uint8_t g, uint8_t b) noexcept: value_(rgb(r, g, b)) {}
    constexpr Color(uint8_t r, uint8_t g, uint8_t b, uint8_t a) noexcept: value_(rgba(r, g, b, a)) {}
    constexpr operator color_t() const noexcept { return value_; }
    constexpr color_t value() const noexcept { return value_; }
    A_CONSTEXPR_CXX14 color_t& value() noexcept { return value_; }
private:
    color_t value_;
};
 
 
AST_NAMESPACE_END