summaryrefslogtreecommitdiff
path: root/src/gallium/docs
diff options
context:
space:
mode:
authorRoland Scheidegger <sroland@vmware.com>2010-02-04 21:35:28 +0100
committerRoland Scheidegger <sroland@vmware.com>2010-02-04 21:35:28 +0100
commit68f93ea3eb83cfad014b8ec93cec3564c1aa9833 (patch)
treea563ebec246a2e741750a8b5198da180e9479e17 /src/gallium/docs
parent2c326e72664e65166c68b027b26aaf373f3be36d (diff)
gallium: add point_quad_rasterization bit to rasterizer state
This determines if points should be rasterized according to GL point rules or as normal quads (GL point sprites / d3d points / d3d point sprites).
Diffstat (limited to 'src/gallium/docs')
-rw-r--r--src/gallium/docs/source/cso/rasterizer.rst14
1 files changed, 12 insertions, 2 deletions
diff --git a/src/gallium/docs/source/cso/rasterizer.rst b/src/gallium/docs/source/cso/rasterizer.rst
index 721229d67d..00d65fc598 100644
--- a/src/gallium/docs/source/cso/rasterizer.rst
+++ b/src/gallium/docs/source/cso/rasterizer.rst
@@ -85,8 +85,10 @@ point_size
sprite_coord_enable
Specifies if a coord has its texture coordinates replaced or not. This
is a packed bitfield containing the enable for all coords - if all are 0
- point sprites are effectively disabled. If any coord is non-zero,
- point_smooth should be disabled.
+ point sprites are effectively disabled, though points may still be
+ rendered slightly different according to point_quad_rasterization.
+ If any coord is non-zero, point_smooth should be disabled, and
+ point_quad_rasterization enabled.
If enabled, the four vertices of the resulting quad will be assigned
texture coordinates, according to sprite_coord_mode.
sprite_coord_mode
@@ -103,6 +105,14 @@ sprite_coord_mode
Note that when geometry shaders are available, this state could be
removed. A special geometry shader defined by the state tracker could
convert the incoming points into quads with the proper texture coords.
+point_quad_rasterization
+ This determines if points should be rasterized as quads or points.
+ d3d always uses quad rasterization for points, regardless if point sprites
+ are enabled or not, but OGL has different rules. If point_quad_rasterization
+ is set, point_smooth should be disabled, and points will be rendered as
+ squares even if multisample is enabled.
+ sprite_coord_enable should be zero if point_quad_rasterization is not
+ enabled.
scissor
Whether the scissor test is enabled.