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macOS add fallback for retrieving color channels from dynamic system colors on pre 10.14 systems

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the channel conversion was only working on systems starting from 10.14, using the CGColor as a fallback
This commit is contained in:
Stefan Csomor
2021-01-26 16:40:41 +01:00
parent 56a5512b37
commit 17239d5c3d
1 changed files with 56 additions and 4 deletions
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60
src/osx/cocoa/colour.mm
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@@ -37,6 +37,7 @@ public:
virtual WX_NSColor GetNSColor() const wxOVERRIDE;
virtual WX_NSImage GetNSPatternImage() const wxOVERRIDE;
private:
static CGFloat GetCGColorComponent(CGColorRef col, int rgbaIndex);
WX_NSColor m_nsColour;
wxDECLARE_NO_ASSIGN_CLASS(wxNSColorRefData);
@@ -62,13 +63,64 @@ WX_NSColor wxNSColorRefData::GetNSColor() const
return m_nsColour;
}
CGFloat wxNSColorRefData::GetCGColorComponent(CGColorRef col, int rgbaIndex)
{
CGFloat value = 0.0;
if ( col )
{
wxCFRef<CGColorRef> rgbacol;
CGColorSpaceModel model = CGColorSpaceGetModel(CGColorGetColorSpace(col));
size_t noComp = CGColorGetNumberOfComponents(col);
const CGFloat* components = CGColorGetComponents(col);
bool isRGB = true;
if (model == kCGColorSpaceModelMonochrome)
{
wxASSERT_MSG(1 <= noComp && noComp <= 2, "Monochrome Color unexpected components");
// is alpha is requested look into component if available
if ( rgbaIndex == 3 )
value = noComp > 1 ? components[1] : 1.0;
else
value = components[0];
isRGB = false;
}
else if (model != kCGColorSpaceModelRGB)
{
if ( WX_IS_MACOS_OR_IOS_AVAILABLE(10, 11, 9, 0) )
{
rgbacol = CGColorCreateCopyByMatchingToColorSpace(wxMacGetGenericRGBColorSpace(), kCGRenderingIntentDefault, col, NULL);
noComp = CGColorGetNumberOfComponents(rgbacol);
components = CGColorGetComponents(rgbacol);
}
else
{
isRGB = false;
}
}
if (isRGB)
{
wxASSERT_MSG(3 <= noComp && noComp <= 4, "RGB Color unexpected components");
// is alpha is requested look into component if available
if ( rgbaIndex == 3 )
value = noComp == 4 ? components[3] : 1.0;
else
value = components[rgbaIndex];
}
}
return value;
}
CGFloat wxNSColorRefData::Red() const
{
wxOSXEffectiveAppearanceSetter helper;
if ( NSColor* colRGBA = [m_nsColour colorUsingColorSpaceName:NSCalibratedRGBColorSpace] )
return [colRGBA redComponent];
return 0.0;
return GetCGColorComponent([m_nsColour CGColor], 0);
}
CGFloat wxNSColorRefData::Green() const
@@ -77,7 +129,7 @@ CGFloat wxNSColorRefData::Green() const
if ( NSColor* colRGBA = [m_nsColour colorUsingColorSpaceName:NSCalibratedRGBColorSpace] )
return [colRGBA greenComponent];
return 0.0;
return GetCGColorComponent([m_nsColour CGColor], 1);
}
CGFloat wxNSColorRefData::Blue() const
@@ -86,7 +138,7 @@ CGFloat wxNSColorRefData::Blue() const
if ( NSColor* colRGBA = [m_nsColour colorUsingColorSpaceName:NSCalibratedRGBColorSpace] )
return [colRGBA blueComponent];
return 0.0;
return GetCGColorComponent([m_nsColour CGColor], 2);
}
CGFloat wxNSColorRefData::Alpha() const
@@ -95,7 +147,7 @@ CGFloat wxNSColorRefData::Alpha() const
if ( NSColor* colRGBA = [m_nsColour colorUsingColorSpaceName:NSCalibratedRGBColorSpace] )
return [colRGBA alphaComponent];
return 0.0;
return GetCGColorComponent([m_nsColour CGColor], 3);
}
bool wxNSColorRefData::IsSolid() const