FBO and cube map on ATI card with Catalyst 5.6

OpenGL OpenGL: Advanced Coding
1

I am getting a segmentation fault when I specify a cube map target to the glFramebufferTexture2DEXT call. Here’s a snippet of code for just the -X face:

glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB, 0, GL_RGB, res, res, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);

glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB, id, 0);

When I do this with GL_TEXTURE_2D it does not crash. Has anyone done this with success or can an anyone confirm that is is not yet supported?

2

I’m not sure if it’s supposed to work in that driver, but render to cubemap certainly working in our current internal builds.

3

Cube map rendering on the 5.6 driver is broken.

4

Was it working in previous driver releases?

5

No, because previous drivers didn’t support FBO.

6

FBO is not supported ‘officially’ in the Cat 5.6 ? (ie, the extension is not shown is the GL_EXTENSIONS string). At least, not on Radeon 9800 or earlier.

It’s only supported by nVidia . Also you cannot download the Catalyst 5.6 anymore URL broken from ATI web page.

Are you trying to use FBO without checking for the extension ? :wink: That’s why it doesn’t work …

7

Yes, I am loading the function pointers even though it is not returned in the extensions string. I read that it was partially implemented on another thread and wanted to try it out. Any idea when this will be fully implemented on ATI? BTW I am running an X800 card.

8

Implementing all corner cases and correctly handling all weird application paths is quite a large task, so that will take a while. But an implementation that covers 95% of the normal usage should be out in the not too distant future.