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#pragma once
#include <AK/AKString.h>
#include <AK/Types.h>
typedef dword RGBA32;
inline constexpr dword make_rgb(byte r, byte g, byte b)
{
return ((r << 16) | (g << 8) | b);
}
class Color {
public:
enum NamedColor {
Black,
White,
Red,
Green,
Blue,
Yellow,
Magenta,
DarkGray,
MidGray,
LightGray,
DarkGreen,
DarkBlue,
DarkRed,
MidGreen,
MidRed,
MidBlue,
MidMagenta,
};
Color() { }
Color(NamedColor);
Color(byte r, byte g, byte b) : m_value(0xff000000 | (r << 16) | (g << 8) | b) { }
Color(byte r, byte g, byte b, byte a) : m_value((a << 24) | (r << 16) | (g << 8) | b) { }
static Color from_rgb(unsigned rgb) { return Color(rgb | 0xff000000); }
static Color from_rgba(unsigned rgba) { return Color(rgba); }
byte red() const { return (m_value >> 16) & 0xff; }
byte green() const { return (m_value >> 8) & 0xff; }
byte blue() const { return m_value & 0xff; }
byte alpha() const { return (m_value >> 24) & 0xff; }
void set_alpha(byte value)
{
m_value &= 0x00ffffff;
m_value |= value << 24;
}
Color with_alpha(byte alpha)
{
return Color((m_value & 0x00ffffff) | alpha << 24);
}
Color blend(Color source) const
{
if (!alpha() || source.alpha() == 255)
return source;
if (!source.alpha())
return *this;
int d = 255 * (alpha() + source.alpha()) - alpha() * source.alpha();
byte r = (red() * alpha() * (255 - source.alpha()) + 255 * source.alpha() * source.red()) / d;
byte g = (green() * alpha() * (255 - source.alpha()) + 255 * source.alpha() * source.green()) / d;
byte b = (blue() * alpha() * (255 - source.alpha()) + 255 * source.alpha() * source.blue()) / d;
byte a = d / 255;
return Color(r, g, b, a);
}
RGBA32 value() const { return m_value; }
String to_string() const;
private:
explicit Color(RGBA32 rgba) : m_value(rgba) { }
RGBA32 m_value { 0 };
};
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