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OK, _all_ extensions that might get enabled by the driver need to be in the
card_extensions[] list. driInitExtensions() is called at least twice: first
during screen creation, then once for each context that's created.
The first call sets up the dispatch table. The second call just sets the
extension enable/disable flags.
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constants.
Previously, this limited us to 12 temp regs for vertex programs. Many vertex
shaders could exceed that. This forces us to stop using t_vb_arbprogram.c
for now because of its particular register indexing scheme. Need to increase
bits allocated for register indexing, etc.
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detected w/ valgrind
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Don't place buffer objects on unfenced list when newly created.
Fix a buffer object wait-for-idle deadlock.
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OSMesaDestroyContext()
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It could only be called from XMesaCopySubBuffer but this function is not used
by XFree86.
It seems that XMesaPutImageHelper would handle sub-images but never got
finished. Proper sub-image helpers should be written if need be.
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This uses xmesa.h as the GLcore interface and avoids adding an explicit GLcore
inteface which would not be a proper interface anyway.
It puts the declarations of the three functions specific for XMesa/XFree86 in
xmesa.h, we can push them down to xmesa_xf86.h if hiding behind XFree86Server
ifdef's is not enough.
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(see bug 10587)
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what's expected.
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Note that (unlike texture objects), shader handles remain valid (in the
hash table) after glDeleteShader/Program() if the refcount isn't zero.
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