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Re: Enabling multisampling in NSOpenGLView?

This is not the case (at least in my AGL test which I just ran). As is documented at <http://developer.apple.com/documentation/ GraphicsImaging/Reference/AGL_OpenGL/index.html>

Note: While it is not required to specify the AGL_PBUFFER pixel format attribute, failure to do so will not guarantee a pixel format which is compatible with pixel buffers. In all likelihood, the returned pixel format will be compatible with pixel buffers; it is just not guaranteed.

Not specifying the pixel buffer attribute does not mean you can't use pbuffers. Please ensure a bug is written on your issues with pbuffers and multi-sample.

Geoff Stahl
3D Software Engineer
Apple

On May 21, 2005, at 2:23 AM, Jonathan del Strother wrote:

Just in case anyone's having the same problem, I thought I'd point out that you can 'fix' the problem by removing NSOpenGLPFAPixelBuffer from the pixel format. Of course, that then means you can't use pixel buffers...

Jon


On 6 May 2005, at 16:31, Jonathan del Strother wrote:

I'm having trouble persuading multisampling to work. I used to have it working in Panther, and sometime between then and now it's stopped. I can't figure out if I changed something in my code to break it, or whether Tiger has some different requirements for setting it up...

Pixel format :

    NSOpenGLPixelFormatAttribute attrs[] =
    {
        NSOpenGLPFAPixelBuffer,
        NSOpenGLPFADoubleBuffer,
        NSOpenGLPFAAccelerated,
        NSOpenGLPFAMultisample,
        NSOpenGLPFASampleBuffers, (NSOpenGLPixelFormatAttribute)1,
        NSOpenGLPFASamples, (NSOpenGLPixelFormatAttribute)4,
        (NSOpenGLPixelFormatAttribute)nil
    };

and enabling in OpenGL:

    glEnable (GL_MULTISAMPLE_ARB);
    glHint (GL_MULTISAMPLE_FILTER_HINT_NV, GL_NICEST);


The documentation mentions that NSOpenGLPFAMultisample will only take effect if the pixel format requires anti-aliasing. How do you do that?

This is on a Radeon 9600, running 10.4.0

Cheers,
Jon
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References: 
 >Enabling multisampling in NSOpenGLView? (From: Jonathan del Strother <email@hidden>)
 >Re: Enabling multisampling in NSOpenGLView? (From: Jonathan del Strother <email@hidden>)



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