Binding a VBO to a FBO

[ToolTech]

Excuse my novice question, but is there or will there be a way to render into a FBO that is mapped to a VBO and specify a swizzle so e.x. the rendering components r,g goes into the VBO x,z without going back to CPU mem ?

[yooyo]

Create PBO buffer
Create FBO (rgba32f if you need full precission)
Render to FBO
Readback to PBO
Rebind PBO as VBO

yooyo

[ToolTech]

ok. So the swizzle then can be made with ordinary GLSL and you are sure then the rendered data is never transferred to GPU mem..

great news..

[yooyo]

Yep.. swizling can be done by fragment shader. Framebuffer data will be copied to another part of GPU memory (PBO memory).

yooyo