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MrWereWolf

OpenGL Fast copy/restore pixels in framebuffer.

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In my program I need to save then later restore (for multiple times) the pixels in the framebuffer. I found the following solutions: -Copy to a texture (glCopyTexImage2D), then re-display it later. --> Works, but quite slow -glReadPixels/glDrawPixels... --> Never even think -WGL_ARB_buffer_region --> Not supported by ATI cards? -GL_KTX_buffer_region --> Not supported above Radeon 9600? + It is not documented in the SGI OpenGL Extension Registry? As you can see, the solution that could give me reasonable speed is not actually supported. Is WGL_ARB_buffer_region a dying extension? Does ATI have any similar extension? Any other idea for my problem? Thanks! //Mr.WereWolf//

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have you tried simply rendering to an auxilary buffer, and not clearing it?

dont know if the alpha/Depth is saved there thou... I havn't been able to recall it yet... I tried asking for help, but no-one was able to help me... :/

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Then behold the new GL_EXT_framebuffer_object extension. In the latest 5.7 catalyst drivers, it is FINALLY supported!

Basically it is a render-to-texture extension which was not being supported by ati cards until a couple of weeks back.

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