From: Keith Whitwell <keith@tungstengraphics.com>
Date: Wed, 4 Feb 2004 16:59:30 +0000 (+0000)
Subject: Fix off-by-one in calculations for wrapped trifan, polygon primitives
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=36ff43b596f3bc122f2379b2c161ff9d4e05eeec;p=mesa.git

Fix off-by-one in calculations for wrapped trifan, polygon primitives
---

diff --git a/src/mesa/tnl_dd/t_dd_dmatmp.h b/src/mesa/tnl_dd/t_dd_dmatmp.h
index a9bee5017bd..e8681dcd034 100644
--- a/src/mesa/tnl_dd/t_dd_dmatmp.h
+++ b/src/mesa/tnl_dd/t_dd_dmatmp.h
@@ -353,7 +353,7 @@ static void TAG(render_tri_fan_verts)( GLcontext *ctx,
 	 currentsz = dmasz;
       }
 
-      for (j = start + 1 ; j + 1 < count; j += nr - 1 ) {
+      for (j = start + 1 ; j + 1 < count; j += nr - 2 ) {
 	 void *tmp;
 	 nr = MIN2( currentsz, count - j + 1 );
 	 tmp = ALLOC_VERTS( nr );
@@ -392,7 +392,7 @@ static void TAG(render_poly_verts)( GLcontext *ctx,
 	 currentsz = dmasz;
       }
 
-      for (j = start + 1 ; j + 1 < count ; j += nr - 1 ) {
+      for (j = start + 1 ; j + 1 < count ; j += nr - 2 ) {
 	 void *tmp;
 	 nr = MIN2( currentsz, count - j + 1 );
 	 tmp = ALLOC_VERTS( nr );
@@ -919,7 +919,7 @@ static void TAG(render_tri_fan_elts)( GLcontext *ctx,
 	 currentsz = dmasz;
       }
 
-      for (j = start + 1 ; j + 1 < count; j += nr - 1 ) {
+      for (j = start + 1 ; j + 1 < count; j += nr - 2 ) {
 	 void *tmp;
 	 nr = MIN2( currentsz, count - j + 1 );
 	 tmp = ALLOC_ELTS( nr );
@@ -956,7 +956,7 @@ static void TAG(render_poly_elts)( GLcontext *ctx,
 	 currentsz = dmasz;
       }
 
-      for (j = start + 1 ; j + 1 < count; j += nr - 1 ) {
+      for (j = start + 1 ; j + 1 < count; j += nr - 2 ) {
 	 void *tmp;
 	 nr = MIN2( currentsz, count - j + 1 );
 	 tmp = ALLOC_ELTS( nr );