From: Owen W. Taylor <otaylor@fishsoup.net>
Date: Wed, 6 May 2009 18:44:16 +0000 (-0400)
Subject: When clearing the stencil buffer, don't use a two-sided stencil
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=cfc3ac8d6e3024d1284cfc3f50f695b6b8008c5f;p=mesa.git

When clearing the stencil buffer, don't use a two-sided stencil

In radeon_clear_tris(), when clearing the stencil buffer,
pass GL_FRONT_AND_BACK to _mesa_StencilFuncSeparate(), to avoid
triggering a software fallback on r300 and below.

https://bugs.freedesktop.org/show_bug.cgi?id=21601
---

diff --git a/src/mesa/drivers/dri/radeon/radeon_common.c b/src/mesa/drivers/dri/radeon/radeon_common.c
index 8b5b892f0df..ee3ee9ca504 100644
--- a/src/mesa/drivers/dri/radeon/radeon_common.c
+++ b/src/mesa/drivers/dri/radeon/radeon_common.c
@@ -1429,7 +1429,7 @@ void radeon_clear_tris(GLcontext *ctx, GLbitfield mask)
       if (this_mask & BUFFER_BIT_STENCIL) {
 	 _mesa_Enable(GL_STENCIL_TEST);
 	 _mesa_StencilOp(GL_REPLACE, GL_REPLACE, GL_REPLACE);
-	 _mesa_StencilFuncSeparate(GL_FRONT, GL_ALWAYS, ctx->Stencil.Clear,
+	 _mesa_StencilFuncSeparate(GL_FRONT_AND_BACK, GL_ALWAYS, ctx->Stencil.Clear,
 				   ctx->Stencil.WriteMask[0]);
       } else {
 	 _mesa_Disable(GL_STENCIL_TEST);