Render directly to texture...

OpenGL
1

At this time rendering to a texture is very slow. First render to the frame buffer then read the data , then pass the data to glteximage2d.

It would be so much faster if we could render directly to the texture buffer…

Peter //Mr.WereWolf//

2

WGL_ARB_render_texture already exists. Even without that you can copy directly from the framebuffer to a texture using glCopyTexImage.

In any case, work is in progress to replace the current render-to-texture mechanism with something much, much better. You’ll just have to wait for it, though.

3

…you can copy directly from the framebuffer to a texture using glCopyTexSubImage…

4

Or just create a new GL context for render target, and treat that context as a texture from the original context. Works very well.