From e6e0ba781b0a6a1b8747cae49ca622a6a61b1bf8 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Tue, 25 May 2004 22:29:52 +0000
Subject: [PATCH] only use simple_z_textured_triangle if depthBits <= 16

---
 src/mesa/swrast/s_triangle.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/mesa/swrast/s_triangle.c b/src/mesa/swrast/s_triangle.c
index 00c1a0ace25..ff4ebb3704d 100644
--- a/src/mesa/swrast/s_triangle.c
+++ b/src/mesa/swrast/s_triangle.c
@@ -192,6 +192,7 @@ _swrast_culltriangle( GLcontext *ctx,
  * Render an RGB, GL_DECAL, textured triangle.
  * Interpolate S,T, GL_LESS depth test, w/out mipmapping or
  * perspective correction.
+ * Depth buffer bits must be <= sizeof(DEFAULT_SOFTWARE_DEPTH_TYPE)
  *
  * No fog.
  */
@@ -1091,7 +1092,8 @@ _swrast_choose_triangle( GLcontext *ctx )
 			&& ctx->Depth.Func == GL_LESS
 			&& ctx->Depth.Mask == GL_TRUE)
 		       || swrast->_RasterMask == TEXTURE_BIT)
-		   && ctx->Polygon.StippleFlag == GL_FALSE) {
+		   && ctx->Polygon.StippleFlag == GL_FALSE
+                   && ctx->Visual.depthBits <= 16) {
 		  if (swrast->_RasterMask == (DEPTH_BIT | TEXTURE_BIT)) {
 		     USE(simple_z_textured_triangle);
 		  }
-- 
2.30.2