Mesa (master): gallium: add an interface for query predicates
Zack Rusin
zack at kemper.freedesktop.org
Wed Jan 26 04:58:42 UTC 2011
Module: Mesa
Branch: master
Commit: 0657fc00dd9e69f71d679d480b5d5f4c33cfae35
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=0657fc00dd9e69f71d679d480b5d5f4c33cfae35
Author: Zack Rusin <zackr at vmware.com>
Date: Wed Jan 26 00:01:51 2011 -0500
gallium: add an interface for query predicates
as specified in the arb_occlusion_query2. just the interface.
---
src/gallium/docs/source/context.rst | 5 +++++
src/gallium/include/pipe/p_defines.h | 3 ++-
2 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/src/gallium/docs/source/context.rst b/src/gallium/docs/source/context.rst
index 6760e7b..f0d3b84 100644
--- a/src/gallium/docs/source/context.rst
+++ b/src/gallium/docs/source/context.rst
@@ -233,6 +233,11 @@ The most common type of query is the occlusion query,
are written to the framebuffer without being culled by
:ref:`Depth, Stencil, & Alpha` testing or shader KILL instructions.
The result is an unsigned 64-bit integer.
+In cases where a boolean result of an occlusion query is enough,
+``PIPE_QUERY_OCCLUSION_PREDICATE`` should be used. It is just like
+``PIPE_QUERY_OCCLUSION_COUNTER`` except that the result is a boolean
+value of FALSE for cases where COUNTER would result in 0 and TRUE
+for all other cases.
Another type of query, ``PIPE_QUERY_TIME_ELAPSED``, returns the amount of
time, in nanoseconds, the context takes to perform operations.
diff --git a/src/gallium/include/pipe/p_defines.h b/src/gallium/include/pipe/p_defines.h
index 2135c19..f66bbaf 100644
--- a/src/gallium/include/pipe/p_defines.h
+++ b/src/gallium/include/pipe/p_defines.h
@@ -380,7 +380,8 @@ enum pipe_transfer_usage {
#define PIPE_QUERY_SO_STATISTICS 5
#define PIPE_QUERY_GPU_FINISHED 6
#define PIPE_QUERY_TIMESTAMP_DISJOINT 7
-#define PIPE_QUERY_TYPES 8
+#define PIPE_QUERY_OCCLUSION_PREDICATE 8
+#define PIPE_QUERY_TYPES 9
/**
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