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[RESOLVED] Re: Pattern colors and alpha

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[RESOLVED] Re: Pattern colors and alpha

Subject: [RESOLVED] Re: Pattern colors and alpha
From: Luke Evans <email@hidden>
Date: Sun, 13 Jan 2008 16:38:58 -0800

Anyway, there's every chance I'm just being dumb - ...


Indeed there is.

The moral of the story here is never to assume. I _assumed_ (and partly this was a false sense of familiarity) that NSRectFill would use whatever compositing operation was set in the graphics context.

Apparently not.

Once RTFM occurred, it was plain that this function forces NSCompositeCopy, and I clearly wanted NSCompositeSourceOver

Ergo, no image is required - using the more general NSRectFillUsingOperation I can now bang my hatch pattern with its alpha right over the top of any previously drawn graphics - with expected results. Hooray, this n00b gets to move on to the next conundrum ;-)

-- Lwe

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  >Pattern colors and alpha (From: Luke Evans <email@hidden>)




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