Re: CAOpenGLLayer
Re: CAOpenGLLayer
- Subject: Re: CAOpenGLLayer
- From: John Harper <email@hidden>
- Date: Wed, 02 Apr 2008 13:19:07 -0700
Hi,
yes, that seems like a good solution,
John
On Apr 2, 2008, at 12:23 PM, Stefan Hafeneger wrote:
Hi John,
I now setup the environment in copyCGLContextForPixelFormat. The
folling code seemd to work fine. Do you see anything that would
create a crash or is this okay? The code should work if the view
moves from one screen to another, shouldn't it?
[CODE]
- (CGLPixelFormatObj)copyCGLPixelFormatForDisplayMask:(uint32_t)mask {
CGLPixelFormatAttribute attributes[] =
{
kCGLPFADisplayMask, mask,
kCGLPFAAccelerated,
kCGLPFAColorSize, 24,
kCGLPFAAlphaSize, 8,
kCGLPFADepthSize, 16,
kCGLPFANoRecovery,
kCGLPFAMultisample,
kCGLPFASupersample,
kCGLPFASampleAlpha,
0
};
CGLPixelFormatObj pixelFormatObj = NULL;
GLint numPixelFormats = 0;
CGLChoosePixelFormat(attributes, &pixelFormatObj, &numPixelFormats);
if(pixelFormatObj == NULL)
NSLog(@"Error: Could not choose pixel format!");
return pixelFormatObj;
}
- (void)releaseCGLPixelFormat:(CGLPixelFormatObj)pixelFormat {
CGLDestroyPixelFormat(pixelFormat);
}
- (CGLContextObj)copyCGLContextForPixelFormat:
(CGLPixelFormatObj)pixelFormat {
CGLContextObj contextObj = NULL;
CGLCreateContext(pixelFormat, NULL, &contextObj);
if(contextObj == NULL)
NSLog(@"Error: Could not create context!");
CGLSetCurrentContext(contextObj);
//
// Setup OpenGL environment.
//
return contextObj;
}
- (void)releaseCGLContext:(CGLContextObj)glContext {
//
// Clean up OpenGL environment.
//
CGLDestroyContext(glContext);
}
[/CODE]
With best wishes, Stefan
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