Re: Quartz Composer/Core Video broken for me in Leopard

Hi there,

I've just upgraded to Leopard and find that some CoreVideo integration that I'm doing with Quartz Composer is not working now. Things were all fine for Tiger. :-)

When it comes to rendering here's what I start with:

CVReturn returnVal = CVOpenGLBufferAttach( 

coreVideoBufferP,

reinterpret_cast<CGLContextObj>([secondFullScreenOpenGLContext CGLContextObj]),

0,    

0,    

0

);

NSAssert(returnVal == kCVReturnSuccess, @"CVOpenGLBufferAttach failed");

            

[secondFullScreenOpenGLContext makeCurrentContext];

I then render my GL world and:

glFlush();

[secondFullScreenOpenGLContext clearDrawable];

After that I call upon Quartz Composer:

// Set up our world image input with our CV buffer

[qcRenderer setValue:(id)coreVideoBufferP forInputKey:@"World_Image"];

            

//Render a frame

[qcRenderer renderAtTime:theCurrentTime arguments:0];

            

//Flush the OpenGL context to display the frame on screen

[fullScreenOpenGLContext flushBuffer];

Here's how I create my CV context:

NSAssert(fullScreenGLPixelFormat, @"!fullScreenGLPixelFormat");

secondFullScreenOpenGLContext = [[NSOpenGLContext alloc] 

initWithFormat:fullScreenGLPixelFormat

shareContext:viewOpenGLContext];

if (secondFullScreenOpenGLContext) {

float theUserSpaceScaleFactor = 1.0;

float theScreenWidth = static_cast<float>(CGDisplayPixelsWide(

displayIDs[displayIDIndex])) * theUserSpaceScaleFactor;

float theScreenHeight = static_cast<float>(CGDisplayPixelsHigh(

displayIDs[displayIDIndex])) * theUserSpaceScaleFactor;

NSAssert(coreVideoBufferP == 0, @"coreVideoBufferP != 0");

CVReturn theReturnVal = CVOpenGLBufferCreate(    

0,    

theScreenWidth,    

theScreenHeight,    

0,    

&coreVideoBufferP

);

 NSAssert(theReturnVal == kCVReturnSuccess && coreVideoBufferP , 

@"!(returnVal == kCVReturnSuccess && coreVideoBuffer)");

}

Any hints on what may have changed in Leopard with regards to Core Video/Quartz Composer? Could this even be a resolution independence thing somehow?

Cheers,

-C

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