What's the best way to share a texture/image between two context with out context sharing?

Question

What I want to do is to get the render result from one context, and do some further rendering in another context which do not shared with the previous one.

The only meth

Answer 1

There are also AMD extensions which might be of some relevance to this qeustion: WGL_AMD_gpu_association and GLX_AMD_gpu_association:

While this extension's focus is assigning GL context to specific GPUs and efficiently copying data between GPUs, it might also be useful for two contexts on the same GPU:

To provide an accelerated path for blitting data from one context to another, the new blit function blitContextFramebufferAMD has been added.

These extensions and also some synchronization techniques for using them are covered in somewhat more detail in this AMD whitepaper.