docs: Explain TGSI_SEMANTIC_NORMAL.

2010-01-04 13:38:58 +01:00
parent 8ab89d7681
commit 86b336f71b
1 changed files with 2 additions and 1 deletions
--- a/src/gallium/docs/source/tgsi.rst
+++ b/src/gallium/docs/source/tgsi.rst
@@ -1253,7 +1253,8 @@ can be stored inside a four-component vector.
 TGSI_SEMANTIC_NORMAL
 """"""""""""""""""""

-XXX no clue.
+Vertex normal; could be used to implement per-pixel lighting for legacy APIs
+that allow mixing fixed-function and programmable stages.

 TGSI_SEMANTIC_FACE
 """"""""""""""""""