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Diffstat (limited to 'src/gallium/docs/source/context.rst')
| -rw-r--r-- | src/gallium/docs/source/context.rst | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/src/gallium/docs/source/context.rst b/src/gallium/docs/source/context.rst index c82e681a254..66028a63b59 100644 --- a/src/gallium/docs/source/context.rst +++ b/src/gallium/docs/source/context.rst @@ -200,9 +200,16 @@ returned). Otherwise, if the ``wait`` parameter is FALSE, the call will not block and the return value will be TRUE if the query has completed or FALSE otherwise. -A common type of query is the occlusion query which counts the number of -fragments/pixels which are written to the framebuffer (and not culled by -Z/stencil/alpha testing or shader KILL instructions). +The most common type of query is the occlusion query, +``PIPE_QUERY_OCCLUSION_COUNTER``, which counts the number of fragments which +are written to the framebuffer without being culled by +:ref:`Depth, Stencil, & Alpha` testing or shader KILL instructions. + +Another type of query, ``PIPE_QUERY_TIME_ELAPSED``, returns the amount of +time, in milliseconds, the context takes to perform operations. + +Gallium does not guarantee the availability of any query types; one must +always check the capabilities of the :ref:`Screen` first. Conditional Rendering |