From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Wed, 19 Aug 2009 08:29:31 +0000 (+0000)
Subject: fix glDrawRangeElements issue with mesa
X-Git-Tag: xonotic-v0.1.0preview~1498
X-Git-Url: http://git.xonotic.org/?a=commitdiff_plain;h=1584b69e04ea4dcd6042197b925f8d72127f5120;hp=d8c78801d052d515fe991d578eeb18eebd0e57f8;p=xonotic%2Fdarkplaces.git

fix glDrawRangeElements issue with mesa


git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@9131 d7cf8633-e32d-0410-b094-e92efae38249
---

diff --git a/gl_backend.c b/gl_backend.c
index 89b789c3..c0907b36 100644
--- a/gl_backend.c
+++ b/gl_backend.c
@@ -1279,7 +1279,7 @@ void R_Mesh_Draw(int firstvertex, int numvertices, int firsttriangle, int numtri
 			GL_BindEBO(bufferobject3s);
 			if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
 			{
-				qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices, numelements, GL_UNSIGNED_SHORT, (void *)(firsttriangle * sizeof(unsigned short[3])));
+				qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_SHORT, (void *)(firsttriangle * sizeof(unsigned short[3])));
 				CHECKGLERROR
 			}
 			else
@@ -1293,7 +1293,7 @@ void R_Mesh_Draw(int firstvertex, int numvertices, int firsttriangle, int numtri
 			GL_BindEBO(bufferobject3i);
 			if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
 			{
-				qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices, numelements, GL_UNSIGNED_INT, (void *)(firsttriangle * sizeof(unsigned int[3])));
+				qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_INT, (void *)(firsttriangle * sizeof(unsigned int[3])));
 				CHECKGLERROR
 			}
 			else
@@ -1307,7 +1307,7 @@ void R_Mesh_Draw(int firstvertex, int numvertices, int firsttriangle, int numtri
 			GL_BindEBO(0);
 			if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
 			{
-				qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices, numelements, GL_UNSIGNED_SHORT, element3s);
+				qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_SHORT, element3s);
 				CHECKGLERROR
 			}
 			else
@@ -1321,7 +1321,7 @@ void R_Mesh_Draw(int firstvertex, int numvertices, int firsttriangle, int numtri
 			GL_BindEBO(0);
 			if (gl_mesh_drawrangeelements.integer && qglDrawRangeElements != NULL)
 			{
-				qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices, numelements, GL_UNSIGNED_INT, element3i);
+				qglDrawRangeElements(GL_TRIANGLES, firstvertex, firstvertex + numvertices - 1, numelements, GL_UNSIGNED_INT, element3i);
 				CHECKGLERROR
 			}
 			else