   Copying from one PBO to another
  Hello,Is there a way to copy from one PBO to another? I am interested in copying the entire PBO, not just parts of it. I suppose that there might be a fast way to do it since I am copying inside the video card.   
  Use the GL_ARB_copy_buffer extension.   ;  I really do not understand the documentation. Here is what I am trying to do:I create two PBOs with wglCreatePbufferARB and the other appropriate commands. I draw on the first PBO, then I want to copy the entire contents to the second PBO. How do I do it?After I get the second PBO, I bind it to a texture withwglBindTexImageARB(pbuffer2.hPBuffer, WGL_FRONT_LEFT_ARB);And after that I draw the textured rectangle.   ;  PBOs are Pixel Buffer Objects, not Pbuffers. You want FBOs. They're a lot more easier to use and there's glBlitFramebuffer, which allows you to copy between FBOs.   