Re: Saving the result of processing an image to another image

What's you describe here works, although it could be a lot more optimized: using a QCRenderer instead of a QCView and not do start / render / stop for every frame as it prevents any caching of resources.

In your current implementation, you might not even need to create a background window, just the QCView. Or even better, something like this might work:

NSString*                        compositionPath = @"?"; //Set to composition path

NSOpenGLPixelFormatAttribute    attributes[] = {NSOpenGLPFAAccelerated, NSOpenGLPFANoRecovery, (NSOpenGLPixelFormatAttribute)0};

NSAutoreleasePool*                pool = [NSAutoreleasePool new];

NSOpenGLPixelFormat*            format = [[NSOpenGLPixelFormat alloc] initWithAttributes:attributes];

NSOpenGLContext*                context = [[NSOpenGLContext alloc] initWithFormat:format shareContext:nil];

QCRenderer*                        renderer = [[QCRenderer alloc] initWithOpenGLContext:context pixelFormat:format file:compositionPath];

//Do the following for each image to be processed by the composition

{

    //Set composition input parameters here - like numerical values, images...

    //[renderer setValue:? forInputKey:@"Image"];

    

    //Run composition

    [renderer renderAtTime:0.0 arguments:nil];

    

    //Retrieve composition output results here

    //image = [renderer valueForOutputKey:@"Image"];

}

[renderer release];

[context release];

[format release];

[pool release];