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Thomas Hellstrom authored
With GLX_SWAP_COPY_OML and GLX_SWAP_EXCHANGE_OML it may happen in situations when glXSwapBuffers() is immediately followed by for example another glXSwapBuffers() or glXCopyBuffers() or back buffer age querying, that we haven't yet allocated and initialized a new back buffer because there was no GL rendering in between. Make sure that we have a back buffer in those situations. v2: Eliminate the drawable have_back_format member. v3: Make sure we re-initialize the back even if it exists. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
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