Revert "mesa: check for z=0 in _mesa_Vertex3dv()"

This reverts commit f04d7439a0ad6e13ff2912ff824553b6bcf511a4.

It no longer helps performance and the current vbo implementation is
faster anyway.

The app that hit this was a CAD program called Spazio3D. It made pretty
terrible use of the OpenGL API and we sent them some tips for improvements.
I'm assuming they've fixed this by now.

Reviewed-by: Mathias Fröhlich <Mathias.Froehlich@web.de>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4052>

diff --git a/src/mesa/main/api_loopback.c b/src/mesa/main/api_loopback.c
index c03c33ee33921efc8cf219a96cc8a76c3ab1e394..53873eae29e42d9cdc0ff52785e8a37f37699c6b 100644 (file)
--- a/src/mesa/main/api_loopback.c
+++ b/src/mesa/main/api_loopback.c
@@ -631,10 +631,7 @@ _mesa_Vertex2sv( const GLshort *v )
 void GLAPIENTRY
 _mesa_Vertex3dv( const GLdouble *v )
 {
-   if (v[2] == 0.0)
-      VERTEX2( (GLfloat) v[0], (GLfloat) v[1] );
-   else
-      VERTEX3( (GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2] );
+   VERTEX3( (GLfloat) v[0], (GLfloat) v[1], (GLfloat) v[2] );
 }
 
 void GLAPIENTRY