static CGColorRef createCGColorWithDeviceRGBA(CGColorRef sourceColor)
{
if (!sourceColor || CFEqual(CGColorGetColorSpace(sourceColor), deviceRGBColorSpaceRef()))
return CGColorRetain(sourceColor);
RetainPtr<CGColorTransformRef> colorTransform = adoptCF(CGColorTransformCreate(deviceRGBColorSpaceRef(), nullptr));
if (!colorTransform)
return CGColorRetain(sourceColor);
// CGColorTransformConvertColor() returns a +1 retained object.
return CGColorTransformConvertColor(colorTransform.get(), sourceColor, kCGRenderingIntentDefault);
}
static QColor qcolorFromCGColor(CGColorRef cgcolor)
{
QColor pc;
CGColorSpaceModel model = CGColorSpaceGetModel(CGColorGetColorSpace(cgcolor));
const CGFloat *components = CGColorGetComponents(cgcolor);
if (model == kCGColorSpaceModelRGB) {
pc.setRgbF(components[0], components[1], components[2], components[3]);
} else if (model == kCGColorSpaceModelCMYK) {
pc.setCmykF(components[0], components[1], components[2], components[3]);
} else if (model == kCGColorSpaceModelMonochrome) {
pc.setRgbF(components[0], components[0], components[0], components[1]);
} else {
// Colorspace we can't deal with.
qWarning("Qt: qcolorFromCGColor: cannot convert from colorspace model: %d", model);
Q_ASSERT(false);
}
return pc;
}
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));
}