From: Eric Anholt <eric@anholt.net>
Date: Tue, 21 Jul 2009 00:58:12 +0000 (-0700)
Subject: i965: Don't clip everything if FRONT_AND_BACK culling while culling disabled.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1b445f96737cf5a1a28e81ff94a2e07b2cac3a96;p=mesa.git

i965: Don't clip everything if FRONT_AND_BACK culling while culling disabled.

Fixes everything-black with meta_clear_tris on quake4-mpdemo and doom3-demo.

Bug #18844, 22077.
(cherry picked from commit 81d555068408d4343d7627c8bedda5675f09bd21)
---

diff --git a/src/mesa/drivers/dri/i965/brw_clip.c b/src/mesa/drivers/dri/i965/brw_clip.c
index 5cffcebde43..8fc9f89cb70 100644
--- a/src/mesa/drivers/dri/i965/brw_clip.c
+++ b/src/mesa/drivers/dri/i965/brw_clip.c
@@ -152,7 +152,8 @@ static void upload_clip_prog(struct brw_context *brw)
 
    /* _NEW_POLYGON */
    if (key.primitive == GL_TRIANGLES) {
-      if (ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK) 
+      if (ctx->Polygon.CullFlag &&
+	  ctx->Polygon.CullFaceMode == GL_FRONT_AND_BACK)
 	 key.clip_mode = BRW_CLIPMODE_REJECT_ALL;
       else {
 	 GLuint fill_front = CLIP_CULL;