It's very rare that a GL app calls glVertex3dv(), but one in particular
calls it lot, always with Z = 0. Check for that condition and convert
the call into glVertex2f. This reduces VBO memory used and reduces
the number of times we have to switch between float[2] and float[3]
vertex formats in the svga driver. This results in a small but
measurable performance improvement.
---
src/mesa/main/api_loopback.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/src/mesa/main/api_loopback.c b/src/mesa/main/api_loopback.c
index a7fd82c..8b63d9c 100644
--- a/src/mesa/main/api_loopback.c
+++ b/src/mesa/main/api_loopback.c
@@ -629,7 +629,10 @@ _mesa_Vertex2sv( const GLshort *v )
void GLAPIENTRY
_mesa_Vertex3dv( const GLdouble *v )
{
- VERTEX3( (GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2] );
+ if (v[2] == 0.0)
+ VERTEX2( (GLfloat) v[0], (GLfloat) v[1] );
+ else
+ VERTEX3( (GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2] );
}
void GLAPIENTRY
--
1.9.1
_______________________________________________
mesa-dev mailing list
[email protected]
http://lists.freedesktop.org/mailman/listinfo/mesa-dev
