gallium/docs: document result type for some types of queries
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@@ -232,9 +232,11 @@ The most common type of query is the occlusion query,
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``PIPE_QUERY_OCCLUSION_COUNTER``, which counts the number of fragments which
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are written to the framebuffer without being culled by
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:ref:`Depth, Stencil, & Alpha` testing or shader KILL instructions.
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The result is an unsigned 64-bit integer.
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Another type of query, ``PIPE_QUERY_TIME_ELAPSED``, returns the amount of
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time, in nanoseconds, the context takes to perform operations.
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The result is an unsigned 64-bit integer.
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Gallium does not guarantee the availability of any query types; one must
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always check the capabilities of the :ref:`Screen` first.
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