Color::Color(CGColorRef color)
{
if (!color) {
m_color = 0;
m_valid = false;
return;
}
size_t numComponents = CGColorGetNumberOfComponents(color);
const CGFloat* components = CGColorGetComponents(color);
float r = 0;
float g = 0;
float b = 0;
float a = 0;
switch (numComponents) {
case 2:
r = g = b = components[0];
a = components[1];
break;
case 4:
r = components[0];
g = components[1];
b = components[2];
a = components[3];
break;
default:
ASSERT_NOT_REACHED();
}
m_color = makeRGBA(r * 255, g * 255, b * 255, a * 255);
m_valid = true;
}
Color::Color(CGColorRef color)
{
if (!color) {
m_color = 0;
m_valid = false;
return;
}
#if !PLATFORM(IOS)
size_t numComponents = CGColorGetNumberOfComponents(color);
const CGFloat* components = CGColorGetComponents(color);
#else
RetainPtr<CGColorRef> correctedColor = adoptCF(createCGColorWithDeviceRGBA(color));
if (!correctedColor)
correctedColor = color;
size_t numComponents = CGColorGetNumberOfComponents(correctedColor.get());
const CGFloat* components = CGColorGetComponents(correctedColor.get());
#endif // !PLATFORM(IOS)
float r = 0;
float g = 0;
float b = 0;
float a = 0;
switch (numComponents) {
case 2:
r = g = b = components[0];
a = components[1];
break;
case 4:
r = components[0];
g = components[1];
b = components[2];
a = components[3];
break;
default:
ASSERT_NOT_REACHED();
}
m_color = makeRGBA(r * 255, g * 255, b * 255, a * 255);
m_valid = true;
}
ColorComponents colorComponentsFromColor(SharedColor color) {
if (!color) {
// Empty color object can be considered as `clear` (black, fully transparent) color.
return ColorComponents {0, 0, 0, 0};
}
auto numberOfComponents = CGColorGetNumberOfComponents(color.get());
assert(numberOfComponents == 4);
const CGFloat *components = CGColorGetComponents(color.get());
return ColorComponents {
(float)components[0],
(float)components[1],
(float)components[2],
(float)components[3]
};
}
GiColor giFromCGColor(CGColorRef color)
{
int num = CGColorGetNumberOfComponents(color);
CGColorSpaceModel space = CGColorSpaceGetModel(CGColorGetColorSpace(color));
const CGFloat *rgba = CGColorGetComponents(color);
if (space == kCGColorSpaceModelMonochrome && num >= 2) {
UInt8 c = (UInt8)mgRound(rgba[0] * 255);
return GiColor(c, c, c, (UInt8)mgRound(rgba[1] * 255));
}
if (num < 3) {
return GiColor::Invalid();
}
return GiColor((UInt8)mgRound(rgba[0] * 255),
(UInt8)mgRound(rgba[1] * 255),
(UInt8)mgRound(rgba[2] * 255),
(UInt8)mgRound(CGColorGetAlpha(color) * 255));
}