On Sun, 05 Jun 2011 10:44:17 +0100, Chris Wilson <[email protected]> wrote: > I have a naive question: why are we allocating stencil/depth/aux buffers > through X/DRI2? > > I can understand for the sake of interoperability why the color buffer > attachments are negotiated with X, but I can't see any reason why X > wants to know about the others. > -Chris
From the GLX 1.4 specification:
Ancillary buffers are associated with a GLXDrawable, not with a
rendering context. If several rendering contexts are all
writing to the same window, they will share those buffers.
This is why so much of GLX is so painful -- even across address spaces,
drawables have to share buffers.
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