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cocoa: returning alpha multiplied colors in NSColorToRGB

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git-svn-id: trunk@61710 -
This commit is contained in:
dmitry 2019-08-16 20:13:57 +00:00
parent 013971d96c
commit 9cf9304d03
1 changed files with 6 additions and 1 deletions
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7
lcl/interfaces/cocoa/cocoautils.pas
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@ -365,9 +365,14 @@ begin
end; end;
function NSColorToRGB(const Color: NSColor): TColorRef; inline; function NSColorToRGB(const Color: NSColor): TColorRef; inline;
var
alpha: CGFloat;
begin begin
// TColorRef doesn't bear an alpha channel information.
// Thus RGB needs to be multiplied by it.
alpha := Color.alphaComponent;
with Color do with Color do
Result := RGBToColorFloat(redComponent, greenComponent, blueComponent); Result := RGBToColorFloat(redComponent*alpha, greenComponent*alpha, blueComponent*alpha);
end; end;
function NSColorToColorRef(const Color: NSColor): TColorRef; function NSColorToColorRef(const Color: NSColor): TColorRef;