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How to create CIImage from CGContextRef ?

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How to create CIImage from CGContextRef ?

Subject: How to create CIImage from CGContextRef ?
From: Pierre CHATEL <email@hidden>
Date: Sun, 26 Jun 2005 00:00:28 -0300

Hi,

is there a way to create a CIImage from a CGContectRef (which is *not* a bitmap context) ? I need to create a CIImage from an overlay window.

Here is my code:

CGContextRef overlayContext;
QDBeginCGContext(GetWindowPort(overlayWindow), &overlayContext);

//doesn't work since overlayContext is not a bitmap context !
CGImageRef overlayImage = CGBitmapContextCreateImage(overlayContext);

CIImage *initialCIImage = [[CIImage alloc] initWithCGImage:overlayImage];

Thanks,
Pierre


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