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OpenGL occlusion queries work now. The Mesa demos, glean test and piglit
tests all pass. A few enhancements are possible in the future. -Brian
Signed-off-by: Brian Paul <brianp@vmware.com>
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If both Z-test and stencil-test were enabled, we were mis-computing
the vector of updated Z buffer values.
Fixes Z testing bug in progs/demos/fbotexture.c
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This is specific to the llvmpipe driver and not re-usable.
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the llvmpipe tgsi translation is a lot more complete than what was in
gallivm so replacing the latter with the former. this is needed since
the draw llvm paths will use the same code. effectively the proven
llvmpipe code becomes gallivm.
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This was redundant as drivers can just keep track of whether they are
inside a begin/end query pair. We want to add more query types later
and also support nested queries, none of which map well onto a flag like
this. No driver appeared to be using the flag.
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Union not worth the hassle of violating C99 or adding a name to
the structure.
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Fixes depth test for 24bit depth formats.
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More obvious name.
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Description/rationale/to-do items, while I still remember them...
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