summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--src/gallium/docs/source/context.rst10
-rw-r--r--src/gallium/include/pipe/p_state.h4
2 files changed, 9 insertions, 5 deletions
diff --git a/src/gallium/docs/source/context.rst b/src/gallium/docs/source/context.rst
index 571ee87c2dc..a9625f39edc 100644
--- a/src/gallium/docs/source/context.rst
+++ b/src/gallium/docs/source/context.rst
@@ -392,8 +392,10 @@ Conditional Rendering
A drawing command can be skipped depending on the outcome of a query
(typically an occlusion query, or streamout overflow predicate).
The ``render_condition`` function specifies the query which should be checked
-prior to rendering anything. Functions honoring render_condition include
+prior to rendering anything. Functions always honoring render_condition include
(and are limited to) draw_vbo, clear, clear_render_target, clear_depth_stencil.
+The blit function (but not resource_copy_region, which seems inconsistent)
+can also optionally honor the current render condition.
If ``render_condition`` is called with ``query`` = NULL, conditional
rendering is disabled and drawing takes place normally.
@@ -465,8 +467,10 @@ but overlapping blits are not permitted.
This can be considered the equivalent of a CPU memcpy.
``blit`` blits a region of a resource to a region of another resource, including
-scaling, format conversion, and up-/downsampling, as well as
-a destination clip rectangle (scissors).
+scaling, format conversion, and up-/downsampling, as well as a destination clip
+rectangle (scissors). It can also optionally honor the current render condition
+(but either way the blit itself never contributes anything to queries currently
+gathering data).
As opposed to manually drawing a textured quad, this lets the pipe driver choose
the optimal method for blitting (like using a special 2D engine), and usually
offers, for example, accelerated stencil-only copies even where
diff --git a/src/gallium/include/pipe/p_state.h b/src/gallium/include/pipe/p_state.h
index 07ce88ea62d..72576041ece 100644
--- a/src/gallium/include/pipe/p_state.h
+++ b/src/gallium/include/pipe/p_state.h
@@ -592,8 +592,8 @@ struct pipe_blit_info
boolean scissor_enable;
struct pipe_scissor_state scissor;
- boolean render_condition_enable; /**< whether to leave current render
- condition enabled */
+ boolean render_condition_enable; /**< whether the blit should honor the
+ current render condition */
};