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GL_ARB_occlusion_query fails

Subject: GL_ARB_occlusion_query fails
From: "Philippe C.D. Robert" <email@hidden>
Date: Wed, 23 May 2007 20:08:30 +0200
Delivered-to: email@hidden
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Hi,

I noticed that GL_ARB_occlusion_query fails on my Mac Pro w/ Nvidia 7300 GPUs on 10.4.9, whereas it works on a Mac Book Pro. More specific, the function call

glGetQueryObjectivARB(query, GL_QUERY_RESULT_ARB, &pixels_written);

always returns 0 for pixels_written on the Mac Pro when rendering to a floating-point FBO w/ a GL_DEPTH_ATTACHMENT_EXT (targeting some GPGPU stuff). On the other hand, the Mac Book Pro returns the correct value.

Is this a known bug? Is there a workaround for this?

Thanks,

-Phil


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