On 07/16/2013 07:48 AM, Kristian Høgsberg wrote:
There's a few important things to notice in the nested example:
[...]
- There is some kind of issue in there that looks like nested only
runs at half the frame rate. I suspect we're waiting for the frame
events or sending them out too late or something - it's not that
the nested compositor model is inherently slow.
I think the problem (or at least part of it) is a missing call to
display_acquire_window_surface() before glEGLImageTargetTexture2DOES().
Some of cairo-gl functions will call eglMakeCurrent() with
EGL_NO_CONTEXT before returning, so it is just by chance that sometimes
we have the right context bound when bind the eglImage to the texture.
However, once I add the display_acquire_window_surface() call, some
flicker starts to happen. It seems that when toytoolkit defers rendering
because there is a frame callback it ends up calling eglSwapBuffers()
anyway.
Patches coming soon.
Cheers,
Ander
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