Add Intel i965G/Q DRI driver.

This driver comes from Tungsten Graphics, with a few further modifications by
Intel.

1 files changed, 188 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_sf.c b/src/mesa/drivers/dri/i965/brw_sf.c
new file mode 100644
index 0000000000..d5175399d6
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_sf.c
@@ -0,0 +1,188 @@
+/*
+ Copyright (C) Intel Corp.  2006.  All Rights Reserved.
+ Intel funded Tungsten Graphics (http://www.tungstengraphics.com) 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 <keith@tungstengraphics.com>
+  */
+  
+
+#include "glheader.h"
+#include "macros.h"
+#include "enums.h"
+
+#include "intel_batchbuffer.h"
+
+#include "brw_defines.h"
+#include "brw_context.h"
+#include "brw_eu.h"
+#include "brw_util.h"
+#include "brw_sf.h"
+#include "brw_state.h"
+
+#define DO_SETUP_BITS ((1<<FRAG_ATTRIB_MAX)-1)
+
+static void compile_sf_prog( struct brw_context *brw,
+			     struct brw_sf_prog_key *key )
+{
+   struct brw_sf_compile c;
+   const GLuint *program;
+   GLuint program_size;
+   GLuint i, idx;
+
+   memset(&c, 0, sizeof(c));
+
+   /* Begin the compilation:
+    */
+   brw_init_compile(&c.func);
+
+   c.key = *key;
+   c.nr_attrs = brw_count_bits(c.key.attrs);
+   c.nr_attr_regs = (c.nr_attrs+1)/2;
+   c.nr_setup_attrs = brw_count_bits(c.key.attrs & DO_SETUP_BITS);
+   c.nr_setup_regs = (c.nr_setup_attrs+1)/2;
+
+   c.prog_data.urb_read_length = c.nr_attr_regs;
+   c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
+
+   /* Construct map from attribute number to position in the vertex.
+    */
+   for (i = idx = 0; i < VERT_RESULT_MAX; i++) 
+      if (c.key.attrs & (1<<i)) {
+	 c.attr_to_idx[i] = idx;
+	 c.idx_to_attr[idx] = i;
+	 idx++;
+      }
+   
+   /* Which primitive?  Or all three? 
+    */
+   switch (key->primitive) {
+   case SF_TRIANGLES:
+      c.nr_verts = 3;
+      brw_emit_tri_setup( &c );
+      break;
+   case SF_LINES:
+      c.nr_verts = 2;
+      brw_emit_line_setup( &c );
+      break;
+   case SF_POINTS:
+      c.nr_verts = 1;
+      brw_emit_point_setup( &c );
+      break;
+   case SF_UNFILLED_TRIS:
+      c.nr_verts = 3;
+      brw_emit_anyprim_setup( &c );
+      break;
+   default:
+      assert(0);
+      return;
+   }
+	 
+
+   /* get the program
+    */
+   program = brw_get_program(&c.func, &program_size);
+
+   /* Upload
+    */
+   brw->sf.prog_gs_offset = brw_upload_cache( &brw->cache[BRW_SF_PROG],
+					      &c.key,
+					      sizeof(c.key),
+					      program,
+					      program_size,
+					      &c.prog_data,
+					      &brw->sf.prog_data );
+}
+
+
+static GLboolean search_cache( struct brw_context *brw, 
+			       struct brw_sf_prog_key *key )
+{
+   return brw_search_cache(&brw->cache[BRW_SF_PROG], 
+			   key, sizeof(*key),
+			   &brw->sf.prog_data,
+			   &brw->sf.prog_gs_offset);
+}
+
+
+/* Calculate interpolants for triangle and line rasterization.
+ */
+static void upload_sf_prog( struct brw_context *brw )
+{
+   struct brw_sf_prog_key key;
+
+   memset(&key, 0, sizeof(key));
+
+   /* Populate the key, noting state dependencies:
+    */
+   /* CACHE_NEW_VS_PROG */
+   key.attrs = brw->vs.prog_data->outputs_written; 
+
+   /* BRW_NEW_REDUCED_PRIMITIVE */
+   switch (brw->intel.reduced_primitive) {
+   case GL_TRIANGLES: 
+      /* NOTE: We just use the edgeflag attribute as an indicator that
+       * unfilled triangles are active.  We don't actually do the
+       * edgeflag testing here, it is already done in the clip
+       * program.
+       */
+      if (key.attrs & (1<<VERT_RESULT_EDGE))
+	 key.primitive = SF_UNFILLED_TRIS;
+      else
+	 key.primitive = SF_TRIANGLES;
+      break;
+   case GL_LINES: 
+      key.primitive = SF_LINES; 
+      break;
+   case GL_POINTS: 
+      key.primitive = SF_POINTS; 
+      break;
+   }
+
+
+   /* _NEW_LIGHT */
+   key.do_flat_shading = (brw->attribs.Light->ShadeModel == GL_FLAT);
+   key.do_twoside_color = (brw->attribs.Light->Enabled && brw->attribs.Light->Model.TwoSide);
+
+   /* _NEW_POLYGON */
+   if (key.do_twoside_color)
+      key.frontface_ccw = (brw->attribs.Polygon->FrontFace == GL_CCW);
+
+
+   if (!search_cache(brw, &key))
+      compile_sf_prog( brw, &key );
+}
+
+
+const struct brw_tracked_state brw_sf_prog = {
+   .dirty = {
+      .mesa  = (_NEW_LIGHT|_NEW_POLYGON),
+      .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
+      .cache = CACHE_NEW_VS_PROG
+   },
+   .update = upload_sf_prog
+};
+