From: Nicolai Haehnle <nhaehnle@gmail.com>
Date: Sat, 7 Jun 2008 18:25:47 +0000 (+0200)
Subject: r300: Fix stencil buffer clear
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=731686b7132ff50d78ef2dc5bfab550750925132;p=mesa.git

r300: Fix stencil buffer clear

The glean/readPixSanity test passes now.
---

diff --git a/src/mesa/drivers/dri/r300/r300_ioctl.c b/src/mesa/drivers/dri/r300/r300_ioctl.c
index b0225453d3d..2da0ac0e1ab 100644
--- a/src/mesa/drivers/dri/r300/r300_ioctl.c
+++ b/src/mesa/drivers/dri/r300/r300_ioctl.c
@@ -130,8 +130,6 @@ static void r300ClearBuffer(r300ContextPtr r300, int flags, int buffer)
 			t1 |= R300_Z_ENABLE | R300_Z_WRITE_ENABLE;
 			t2 |=
 			    (R300_ZS_ALWAYS << R300_Z_FUNC_SHIFT);
-		} else { //XXX
-			t1 |= R300_STENCIL_FRONT_BACK;	// disable
 		}
 
 		if (flags & CLEARBUFFER_STENCIL) {
@@ -144,20 +142,12 @@ static void r300ClearBuffer(r300ContextPtr r300, int flags, int buffer)
 			    (R300_ZS_REPLACE <<
 			     R300_S_FRONT_ZPASS_OP_SHIFT) |
 			    (R300_ZS_REPLACE <<
-			     R300_S_FRONT_ZFAIL_OP_SHIFT) |
-			    (R300_ZS_ALWAYS <<
-			     R300_S_BACK_FUNC_SHIFT) |
-			    (R300_ZS_REPLACE <<
-			     R300_S_BACK_SFAIL_OP_SHIFT) |
-			    (R300_ZS_REPLACE <<
-			     R300_S_BACK_ZPASS_OP_SHIFT) |
-			    (R300_ZS_REPLACE <<
-			     R300_S_BACK_ZFAIL_OP_SHIFT);
+			     R300_S_FRONT_ZFAIL_OP_SHIFT);
 		}
 
 		e32(t1);
 		e32(t2);
-		e32(r300->state.stencil.clear);
+		e32(R300_STENCILWRITEMASK_MASK | r300->state.stencil.clear);
 	}
 
 	cmd2 = (drm_r300_cmd_header_t *) r300AllocCmdBuf(r300, 9, __FUNCTION__);
@@ -307,7 +297,6 @@ static void r300EmitClearState(GLcontext * ctx)
 		reg_start(R300_RS_INST_0, 0);
 		e32(R300_RS_INST_COL_CN_WRITE);
 	} else {
-	  
 		R300_STATECHANGE(r300, ri);
 		reg_start(R500_RS_IP_0, 7);
 		for (i = 0; i < 8; ++i) {