Enabling floating point framebuffers with OpenGL

OpenGL OpenGL: Advanced Coding
1

Anyone know how to enable floating point framebuffers with OpenGL?? The reason I want it is, because I want to have huge numbers of blending operations.

Is this even supported in OpenGL?? I am running on a GFX 5600 by the way…

Thanks in advance,
-Navreet

2

floating point buffers are only available using pbuffers through extensions.
you can’t blend using floating point buffers either. for this you need render to texture and multiple passes.