gallium: add bits for clipping points as tris (d3d-style)

[mesa.git] / src / gallium / docs / source / cso / rasterizer.rst

diff --git a/src/gallium/docs/source/cso/rasterizer.rst b/src/gallium/docs/source/cso/rasterizer.rst
index 44e5544cdaabf65827eb1685dae1cab240b6b81e..8d473b8446e000b0ab00c028a7461ef5cbe63ffb 100644 (file)
--- a/src/gallium/docs/source/cso/rasterizer.rst
+++ b/src/gallium/docs/source/cso/rasterizer.rst
@@ -200,10 +200,11 @@ point_quad_rasterization
 Determines if points should be rasterized according to quad or point
 rasterization rules.
 
-OpenGL actually has quite different rasterization rules for points and
-point sprites - hence this indicates if points should be rasterized as
-points or according to point sprite (which decomposes them into quads,
-basically) rules.
+(Legacy-only) OpenGL actually has quite different rasterization rules
+for points and point sprites - hence this indicates if points should be
+rasterized as points or according to point sprite (which decomposes them
+into quads, basically) rules. Newer GL versions no longer support the old
+point rules at all.
 
 Additionally Direct3D will always use quad rasterization rules for
 points, regardless of whether point sprites are enabled or not.
@@ -217,6 +218,12 @@ generated.
    Some renderers always internally translate points into quads; this state
    still affects those renderers by overriding other rasterization state.
 
+point_tri_clip
+    Determines if clipping of points should happen after they are converted
+    to "rectangles" (required by d3d) or before (required by OpenGL, though
+    this rule is ignored by some IHVs).
+    It is not valid to set this to enabled but have point_quad_rasterization
+    disabled.
 point_smooth
     Whether points should be smoothed. Point smoothing turns rectangular
     points into circles or ovals.