i965: Move clip program compilation to the compiler

Reviewed-by: Topi Pohjolainen <[email protected]>

1 files changed, 163 insertions, 0 deletions

diff --git a/src/intel/compiler/brw_clip.h b/src/intel/compiler/brw_clip.h
new file mode 100644
index 00000000000..bdf7ee25848
--- /dev/null
+++ b/src/intel/compiler/brw_clip.h
@@ -0,0 +1,163 @@
+/*
+ Copyright (C) Intel Corp.  2006.  All Rights Reserved.
+ Intel funded Tungsten Graphics to
+ develop this 3D driver.
+
+ 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 COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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:
+  *   Keith Whitwell <[email protected]>
+  */
+
+#ifndef BRW_CLIP_H
+#define BRW_CLIP_H
+
+#include "brw_compiler.h"
+#include "brw_eu.h"
+
+/* Initial 3 verts, plus at most 6 additional verts from intersections
+ * with fixed planes, plus at most 8 additional verts from intersections
+ * with user clip planes
+ */
+#define MAX_VERTS (3+6+8)
+
+#define PRIM_MASK  (0x1f)
+
+struct brw_clip_compile {
+   struct brw_codegen func;
+   struct brw_clip_prog_key key;
+   struct brw_clip_prog_data prog_data;
+
+   struct {
+      struct brw_reg R0;
+      struct brw_reg vertex[MAX_VERTS];
+
+      struct brw_reg t;
+      struct brw_reg t0, t1;
+      struct brw_reg dp0, dp1;
+
+      struct brw_reg dpPrev;
+      struct brw_reg dp;
+      struct brw_reg loopcount;
+      struct brw_reg nr_verts;
+      struct brw_reg planemask;
+
+      struct brw_reg inlist;
+      struct brw_reg outlist;
+      struct brw_reg freelist;
+
+      struct brw_reg dir;
+      struct brw_reg tmp0, tmp1;
+      struct brw_reg offset;
+
+      struct brw_reg fixed_planes;
+      struct brw_reg plane_equation;
+
+      struct brw_reg ff_sync;
+
+      /* Bitmask indicating which coordinate attribute should be used for
+       * comparison to each clipping plane. A 0 indicates that VARYING_SLOT_POS
+       * should be used, because it's one of the fixed +/- x/y/z planes that
+       * constitute the bounds of the view volume. A 1 indicates that
+       * VARYING_SLOT_CLIP_VERTEX should be used (if available) since it's a user-
+       * defined clipping plane.
+       */
+      struct brw_reg vertex_src_mask;
+
+      /* Offset into the vertex of the current plane's clipdistance value */
+      struct brw_reg clipdistance_offset;
+   } reg;
+
+   /* Number of registers storing VUE data */
+   GLuint nr_regs;
+
+   GLuint first_tmp;
+   GLuint last_tmp;
+
+   bool need_direction;
+
+   struct brw_vue_map vue_map;
+};
+
+/**
+ * True if the given varying is one of the outputs of the vertex shader.
+ */
+static inline bool brw_clip_have_varying(struct brw_clip_compile *c,
+                                         GLuint varying)
+{
+   return (c->key.attrs & BITFIELD64_BIT(varying)) ? 1 : 0;
+}
+
+/* Points are only culled, so no need for a clip routine, however it
+ * works out easier to have a dummy one.
+ */
+void brw_emit_unfilled_clip( struct brw_clip_compile *c );
+void brw_emit_tri_clip( struct brw_clip_compile *c );
+void brw_emit_line_clip( struct brw_clip_compile *c );
+void brw_emit_point_clip( struct brw_clip_compile *c );
+
+/* brw_clip_tri.c, for use by the unfilled clip routine:
+ */
+void brw_clip_tri_init_vertices( struct brw_clip_compile *c );
+void brw_clip_tri_flat_shade( struct brw_clip_compile *c );
+void brw_clip_tri( struct brw_clip_compile *c );
+void brw_clip_tri_emit_polygon( struct brw_clip_compile *c );
+void brw_clip_tri_alloc_regs( struct brw_clip_compile *c,
+			      GLuint nr_verts );
+
+
+/* Utils:
+ */
+
+void brw_clip_interp_vertex( struct brw_clip_compile *c,
+			     struct brw_indirect dest_ptr,
+			     struct brw_indirect v0_ptr, /* from */
+			     struct brw_indirect v1_ptr, /* to */
+			     struct brw_reg t0,
+			     bool force_edgeflag );
+
+void brw_clip_init_planes( struct brw_clip_compile *c );
+
+void brw_clip_emit_vue(struct brw_clip_compile *c,
+		       struct brw_indirect vert,
+                       enum brw_urb_write_flags flags,
+		       GLuint header);
+
+void brw_clip_kill_thread(struct brw_clip_compile *c);
+
+struct brw_reg brw_clip_plane_stride( struct brw_clip_compile *c );
+struct brw_reg brw_clip_plane0_address( struct brw_clip_compile *c );
+
+void brw_clip_copy_flatshaded_attributes( struct brw_clip_compile *c,
+                                          GLuint to, GLuint from );
+
+void brw_clip_init_clipmask( struct brw_clip_compile *c );
+
+struct brw_reg get_tmp( struct brw_clip_compile *c );
+
+void brw_clip_project_position(struct brw_clip_compile *c,
+             struct brw_reg pos );
+void brw_clip_ff_sync(struct brw_clip_compile *c);
+void brw_clip_init_ff_sync(struct brw_clip_compile *c);
+
+#endif