Re: CAOpenGLLayer

FROM : Stefan Hafeneger
DATE : Wed Apr 02 22:26:23 2008

Okay thank you.

With best wishes, Stefan


Am 02.04.2008 um 22:19 schrieb John Harper:
> 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

>