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| author | Brian Paul <brianp@vmware.com> | 2010-10-21 19:03:38 -0600 |
|---|---|---|
| committer | Brian Paul <brianp@vmware.com> | 2010-10-21 19:03:38 -0600 |
| commit | adf35e80d3b3d37b97f0608a5a2f221dbd8c0d64 (patch) | |
| tree | d768de0d56d5439a0b4d819a48019952d60f1622 /src/gallium/docs/source/context.rst | |
| parent | be45255ab1f63c10fefcf2f399ac7d1c9294cf6a (diff) | |
gallium: new CAP, state for primitive restart
Diffstat (limited to 'src/gallium/docs/source/context.rst')
| -rw-r--r-- | src/gallium/docs/source/context.rst | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/gallium/docs/source/context.rst b/src/gallium/docs/source/context.rst index 5342fc25dc..e09a1304c4 100644 --- a/src/gallium/docs/source/context.rst +++ b/src/gallium/docs/source/context.rst @@ -156,6 +156,15 @@ If there is an index buffer bound, and ``indexed`` field is true, all vertex indices will be looked up in the index buffer. ``min_index``, ``max_index``, and ``index_bias`` apply after index lookup. +When drawing indexed primitives, the primitive restart index can be +used to draw disjoint primitive strips. For example, several separate +line strips can be drawn by designating a special index value as the +restart index. The ``primitive_restart`` flag enables/disables this +feature. The ``restart_index`` field specifies the restart index value. + +When primitive restart is in use, array indexes are compared to the +restart index before adding the index_bias offset. + If a given vertex element has ``instance_divisor`` set to 0, it is said it contains per-vertex data and effective vertex attribute address needs to be recalculated for every index. |