From 1e09d3ae19b6e34c100ece9aac4cf7621d2756ce Mon Sep 17 00:00:00 2001
From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Sat, 13 Nov 2010 12:39:52 +0000
Subject: [PATCH] skip zero triangle batches, for good measure

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@10594 d7cf8633-e32d-0410-b094-e92efae38249
---
 gl_rmain.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/gl_rmain.c b/gl_rmain.c
index e5dea7c7..e44489b6 100644
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -12192,6 +12192,12 @@ void RSurf_PrepareVerticesForBatch(int batchneed, int texturenumsurfaces, const
 
 void RSurf_DrawBatch(void)
 {
+	// sometimes a zero triangle surface (usually a degenerate patch) makes it
+	// through the pipeline, killing it earlier in the pipeline would have
+	// per-surface overhead rather than per-batch overhead, so it's best to
+	// reject it here, before it hits glDraw.
+	if (rsurface.batchnumtriangles == 0)
+		return;
 #if 0
 	// batch debugging code
 	if (r_test.integer && rsurface.entity == r_refdef.scene.worldentity && rsurface.batchvertex3f == r_refdef.scene.worldentity->model->surfmesh.data_vertex3f)
-- 
2.39.2