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Re: Color depth

Subject: Re: Color depth
From: Pierre-Olivier Latour <email@hidden>
Date: Wed, 18 Jan 2006 09:10:41 -0800
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Adam,

I'm passing raw pixel data to QC using CVPixelBufferRef.
It works fine with 8 bit RGB buffers like k32ARGBPixelFormat.
However when I create a pixel buffer with a deeper pixel format like k64ARGBCodecType or k48RGBCodecType I get the following error :-

*** <QCGLCVImage = 0x003F55D0 | type = CVImageBuffer | dimensions = 2048x1536 | buffer = 0x0000-0x0000 | target = GL_TEXTURE_RECTANGLE_EXT | ID = 0>: Texture creation from CVImageBuffer failed (error -6683)

I need 10bit or more color depth, any ideas on what pixel formats I can use?

Apparently, Core Video does not support textures in those formats. You could try passing a CGImageRef or a CIImage, but QC does not really support images with more than 8 bits per component as they will very likely be clamped to 8 bits internally.

________________________________________________________
Pierre-Olivier Latour                            	email@hidden
Quartz Composer Team				Apple Computer, Inc.

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