i965: Add untested REJECT_ALL clip state.

src/mesa/drivers/dri/i965/Makefile

@@ -86,6 +86,7 @@ DRIVER_SOURCES = \
 	brw_wm_state.c \
 	brw_wm_surface_state.c \
 	gen6_cc.c \
+	gen6_clip_state.c \
 	gen6_depthstencil.c \
 	gen6_gs_state.c \
 	gen6_vs_state.c

src/mesa/drivers/dri/i965/brw_defines.h

@@ -845,6 +845,27 @@
 /* DW6 */
 # define GEN6_GS_ENABLE					(1 << 15)
 
+#define CMD_3D_CLIP_STATE		      0x7812 /* GEN6+ */
+/* DW1 */
+# define GEN6_CLIP_STATISTICS_ENABLE			(1 << 10)
+/* DW2 */
+# define GEN6_CLIP_ENABLE				(1 << 31)
+# define GEN6_CLIP_API_OGL				(1 << 30)
+# define GEN6_CLIP_XY_TEST				(1 << 28)
+# define GEN6_CLIP_Z_TEST				(1 << 27)
+# define GEN6_CLIP_GB_TEST				(1 << 26)
+# define GEN6_CLIP_MODE_NORMAL				(0 << 13)
+# define GEN6_CLIP_MODE_REJECT_ALL			(3 << 13)
+# define GEN6_CLIP_MODE_ACCEPT_ALL			(4 << 13)
+# define GEN6_CLIP_PERSPECTIVE_DIVIDE_DISABLE		(1 << 9)
+# define GEN6_CLIP_BARYCENTRIC_ENABLE			(1 << 8)
+# define GEN6_CLIP_TRI_PROVOKE_SHIFT			4
+# define GEN6_CLIP_LINE_PROVOKE_SHIFT			2
+# define GEN6_CLIP_TRIFAN_PROVOKE_SHIFT			0
+/* DW3 */
+# define GEN6_CLIP_MIN_POINT_WIDTH_SHIFT		17
+# define GEN6_CLIP_MAX_POINT_WIDTH_SHIFT		6
+
 #define CMD_3D_CONSTANT_VS_STATE	      0x7815 /* GEN6+ */
 #define CMD_3D_CONSTANT_GS_STATE	      0x7816 /* GEN6+ */
 # define GEN6_CONSTANT_BUFFER_3_ENABLE			(1 << 15)

src/mesa/drivers/dri/i965/brw_state.h

@@ -93,6 +93,7 @@ const struct brw_tracked_state brw_index_buffer;
 const struct brw_tracked_state gen6_binding_table_pointers;
 const struct brw_tracked_state gen6_blend_state;
 const struct brw_tracked_state gen6_cc_state_pointers;
+const struct brw_tracked_state gen6_clip_state;
 const struct brw_tracked_state gen6_color_calc_state;
 const struct brw_tracked_state gen6_depth_stencil_state;
 const struct brw_tracked_state gen6_gs_state;

src/mesa/drivers/dri/i965/brw_state_upload.c

@@ -110,7 +110,6 @@ const struct brw_tracked_state *gen6_atoms[] =
    &brw_wm_input_sizes,
    &brw_vs_prog,
    &brw_gs_prog,
-   &brw_clip_prog,
    &brw_sf_prog,
    &brw_wm_prog,
 
@@ -135,13 +134,13 @@ const struct brw_tracked_state *gen6_atoms[] =
 
    &gen6_vs_state,
    &gen6_gs_state,
+   &gen6_clip_state,
 #if 0
    &brw_wm_samplers,
 
    &brw_wm_unit,
    &brw_sf_vp,
    &brw_sf_unit,
-   &brw_clip_unit,
 
    /* Command packets:
     */

src/mesa/drivers/dri/i965/gen6_clip_state.c

@@ -0,0 +1,76 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+#include "brw_context.h"
+#include "brw_state.h"
+#include "brw_defines.h"
+#include "brw_util.h"
+#include "main/macros.h"
+#include "main/enums.h"
+#include "intel_batchbuffer.h"
+
+static void
+upload_clip_state(struct brw_context *brw)
+{
+   struct intel_context *intel = &brw->intel;
+   GLcontext *ctx = &intel->ctx;
+   uint32_t depth_clamp = 0;
+   uint32_t provoking;
+
+   if (!ctx->Transform.DepthClamp)
+      depth_clamp = GEN6_CLIP_Z_TEST;
+
+   if (ctx->Light.ProvokingVertex == GL_FIRST_VERTEX_CONVENTION) {
+      provoking = 0;
+   } else {
+      provoking =
+	 (2 << GEN6_CLIP_TRI_PROVOKE_SHIFT) |
+	 (2 << GEN6_CLIP_TRIFAN_PROVOKE_SHIFT) |
+	 (1 << GEN6_CLIP_LINE_PROVOKE_SHIFT);
+   }
+
+   BEGIN_BATCH(4);
+   OUT_BATCH(CMD_3D_CLIP_STATE << 16 | (4 - 2));
+   OUT_BATCH(0);
+   OUT_BATCH(GEN6_CLIP_ENABLE |
+	     GEN6_CLIP_API_OGL |
+	     GEN6_CLIP_MODE_REJECT_ALL | /* XXX: debug: get VS working */
+	     GEN6_CLIP_XY_TEST |
+	     depth_clamp |
+	     provoking);
+   OUT_BATCH(0);
+   ADVANCE_BATCH();
+}
+
+const struct brw_tracked_state gen6_clip_state = {
+   .dirty = {
+      .mesa  = _NEW_TRANSFORM,
+      .brw   = BRW_NEW_CONTEXT,
+      .cache = 0
+   },
+   .emit = upload_clip_state,
+};