From 3c6f17be3274d6a137fb52b0aacba81259bbb188 Mon Sep 17 00:00:00 2001
From: Aapo Tahkola <aet@rasterburn.org>
Date: Thu, 16 Jun 2005 11:41:19 +0000
Subject: Use depth tiling.

---
 src/mesa/drivers/dri/r300/r300_reg.h   |  6 ++++++
 src/mesa/drivers/dri/r300/r300_state.c | 29 ++++++++++++++++++++++-------
 2 files changed, 28 insertions(+), 7 deletions(-)

(limited to 'src')

diff --git a/src/mesa/drivers/dri/r300/r300_reg.h b/src/mesa/drivers/dri/r300/r300_reg.h
index 3321954ca89..3ea4f4fe8c5 100644
--- a/src/mesa/drivers/dri/r300/r300_reg.h
+++ b/src/mesa/drivers/dri/r300/r300_reg.h
@@ -1216,6 +1216,12 @@ I am fairly certain that they are correct unless stated otherwise in comments.
 #	define R300_RB3D_ZS2_STENCIL_MASK_SHIFT	        8
 #	define R300_RB3D_ZS2_STENCIL_WRITE_MASK_SHIFT	16
 
+/* gap */
+
+#define R300_RB3D_ZSTENCIL_FORMAT                   0x4F10
+#	define R300_DEPTH_FORMAT_16BIT_INT_Z     (0 << 0)
+#	define R300_DEPTH_FORMAT_24BIT_INT_Z     (2 << 0)
+
 /* gap */
 #define R300_RB3D_DEPTHOFFSET               0x4F20
 #define R300_RB3D_DEPTHPITCH                0x4F24
diff --git a/src/mesa/drivers/dri/r300/r300_state.c b/src/mesa/drivers/dri/r300/r300_state.c
index 1c0ccc19860..fd1b006601d 100644
--- a/src/mesa/drivers/dri/r300/r300_state.c
+++ b/src/mesa/drivers/dri/r300/r300_state.c
@@ -2142,7 +2142,7 @@ void r300ResetHwState(r300ContextPtr r300)
 	r300->hw.unk4E10.cmd[3] = 0;
 	
 	/* Again, r300ClearBuffer uses this */
-	if(ctx->Visual.doubleBufferMode){
+	if (ctx->Visual.doubleBufferMode) {
 		r300->hw.cb.cmd[R300_CB_OFFSET] =
 			r300->radeon.radeonScreen->backOffset +
 			r300->radeon.radeonScreen->fbLocation;
@@ -2175,19 +2175,34 @@ void r300ResetHwState(r300ContextPtr r300)
 	r300->hw.unk4EA0.cmd[1] = 0x00000000;
 	r300->hw.unk4EA0.cmd[2] = 0xffffffff;
 
-	r300->hw.unk4F10.cmd[1] = 0x00000002; // depthbuffer format?
-	//r300->hw.unk4F10.cmd[2] = 0x00000000;
+	switch (ctx->Visual.depthBits) {
+	case 16:
+		r300->hw.unk4F10.cmd[1] = R300_DEPTH_FORMAT_16BIT_INT_Z;
+	break;
+	case 24:
+		r300->hw.unk4F10.cmd[1] = R300_DEPTH_FORMAT_24BIT_INT_Z;
+	break;
+	default:
+		fprintf(stderr, "Error: Unsupported depth %d... exiting\n",
+			ctx->Visual.depthBits);
+		exit(-1);
+			
+	}
 	r300->hw.unk4F10.cmd[3] = 0x00000003;
 	r300->hw.unk4F10.cmd[4] = 0x00000000;
 
-	/* experiment a bit */
-	//r300->hw.unk4F10.cmd[2] = 0x00000001; // depthbuffer format?
-
 	r300->hw.zb.cmd[R300_ZB_OFFSET] =
 		r300->radeon.radeonScreen->depthOffset +
 		r300->radeon.radeonScreen->fbLocation;
 	r300->hw.zb.cmd[R300_ZB_PITCH] = r300->radeon.radeonScreen->depthPitch;
-
+	/* Turn off when clearing buffers ? */
+	r300->hw.zb.cmd[R300_ZB_PITCH] |= R300_DEPTH_TILE_ENABLE;
+	
+	if (ctx->Visual.depthBits == 24)
+		r300->hw.zb.cmd[R300_ZB_PITCH] |= R300_DEPTH_MICROTILE_ENABLE;
+	else if (ctx->Visual.depthBits == 16)
+		r300->hw.zb.cmd[R300_ZB_PITCH] |= R300_DEPTH_ENDIAN_WORD_SWAP;
+		
 	r300->hw.unk4F28.cmd[1] = 0;
 
 	r300->hw.unk4F30.cmd[1] = 0;
-- 
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