Add Intel i965G/Q DRI driver.

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

1 files changed, 264 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_clip.c b/src/mesa/drivers/dri/i965/brw_clip.c
new file mode 100644
index 0000000000..0e8591aaa8
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_clip.c
@@ -0,0 +1,264 @@
+/*
+ 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_state.h"
+#include "brw_clip.h"
+
+
+#define FRONT_UNFILLED_BIT  0x1
+#define BACK_UNFILLED_BIT   0x2
+
+
+static void compile_clip_prog( struct brw_context *brw,
+			     struct brw_clip_prog_key *key )
+{
+   struct brw_clip_compile c;
+   const GLuint *program;
+   GLuint program_size;
+   GLuint delta;
+   GLuint i;
+
+   memset(&c, 0, sizeof(c));
+   
+   /* Begin the compilation:
+    */
+   brw_init_compile(&c.func);
+
+   c.key = *key;
+
+
+   /* Need to locate the two positions present in vertex + header.
+    * These are currently hardcoded:
+    */
+   c.header_position_offset = ATTR_SIZE;
+
+   for (i = 0, delta = REG_SIZE; i < VERT_RESULT_MAX; i++)
+      if (c.key.attrs & (1<<i)) {
+	 c.offset[i] = delta;
+	 delta += ATTR_SIZE;
+      }
+
+   c.nr_attrs = brw_count_bits(c.key.attrs);
+   c.nr_regs = (c.nr_attrs + 1) / 2 + 1;  /* are vertices packed, or reg-aligned? */
+   c.nr_bytes = c.nr_regs * REG_SIZE;
+
+   c.prog_data.clip_mode = c.key.clip_mode; /* XXX */
+
+   /* For some reason the thread is spawned with only 4 channels
+    * unmasked.  
+    */
+   brw_set_mask_control(&c.func, BRW_MASK_DISABLE);
+
+
+   /* Would ideally have the option of producing a program which could
+    * do all three:
+    */
+   switch (key->primitive) {
+   case GL_TRIANGLES: 
+      if (key->do_unfilled)
+	 brw_emit_unfilled_clip( &c );
+      else
+	 brw_emit_tri_clip( &c );
+      break;
+   case GL_LINES:
+      brw_emit_line_clip( &c );
+      break;
+   case GL_POINTS:
+      brw_emit_point_clip( &c );
+      break;
+   default:
+      assert(0);
+      return;
+   }
+
+	 
+
+   /* get the program
+    */
+   program = brw_get_program(&c.func, &program_size);
+
+   /* Upload
+    */
+   brw->clip.prog_gs_offset = brw_upload_cache( &brw->cache[BRW_CLIP_PROG],
+						&c.key,
+						sizeof(c.key),
+						program,
+						program_size,
+						&c.prog_data,
+						&brw->clip.prog_data );
+}
+
+
+static GLboolean search_cache( struct brw_context *brw, 
+			       struct brw_clip_prog_key *key )
+{
+   return brw_search_cache(&brw->cache[BRW_CLIP_PROG], 
+			   key, sizeof(*key),
+			   &brw->clip.prog_data,
+			   &brw->clip.prog_gs_offset);
+}
+
+
+
+
+/* Calculate interpolants for triangle and line rasterization.
+ */
+static void upload_clip_prog( struct brw_context *brw )
+{
+   GLcontext *ctx = &brw->intel.ctx;
+   struct brw_clip_prog_key key;
+
+   memset(&key, 0, sizeof(key));
+
+   /* Populate the key:
+    */
+   /* BRW_NEW_REDUCED_PRIMITIVE */
+   key.primitive = brw->intel.reduced_primitive;
+   /* CACHE_NEW_VS_PROG */
+   key.attrs = brw->vs.prog_data->outputs_written;
+   /* _NEW_LIGHT */
+   key.do_flat_shading = (brw->attribs.Light->ShadeModel == GL_FLAT);
+   /* _NEW_TRANSFORM */
+   key.nr_userclip = brw_count_bits(brw->attribs.Transform->ClipPlanesEnabled);
+   key.clip_mode = BRW_CLIPMODE_NORMAL;
+
+   /* _NEW_POLYGON */
+   if (key.primitive == GL_TRIANGLES) {
+      if (brw->attribs.Polygon->CullFaceMode == GL_FRONT_AND_BACK) 
+	 key.clip_mode = BRW_CLIPMODE_REJECT_ALL;
+      else {
+	 GLuint fill_front = CLIP_CULL;
+	 GLuint fill_back = CLIP_CULL;
+	 GLuint offset_front = 0;
+	 GLuint offset_back = 0;
+
+	 if (!brw->attribs.Polygon->CullFlag ||
+	     brw->attribs.Polygon->CullFaceMode != GL_FRONT) {
+	    switch (brw->attribs.Polygon->FrontMode) {
+	    case GL_FILL: 
+	       fill_front = CLIP_FILL; 
+	       offset_front = 0;
+	       break;
+	    case GL_LINE:
+	       key.do_unfilled = 1;
+	       fill_front = CLIP_LINE;
+	       offset_front = brw->attribs.Polygon->OffsetLine;
+	       break;
+	    case GL_POINT:
+	       key.do_unfilled = 1;
+	       fill_front = CLIP_POINT;
+	       offset_front = brw->attribs.Polygon->OffsetPoint;
+	       break;
+	    }
+	 }
+
+	 if (!brw->attribs.Polygon->CullFlag ||
+	     brw->attribs.Polygon->CullFaceMode != GL_BACK) {
+	    switch (brw->attribs.Polygon->BackMode) {
+	    case GL_FILL: 
+	       fill_back = CLIP_FILL; 
+	       offset_back = 0;
+	       break;
+	    case GL_LINE:
+	       key.do_unfilled = 1;
+	       fill_back = CLIP_LINE;
+	       offset_back = brw->attribs.Polygon->OffsetLine;
+	       break;
+	    case GL_POINT:
+	       key.do_unfilled = 1;
+	       fill_back = CLIP_POINT;
+	       offset_back = brw->attribs.Polygon->OffsetPoint;
+	       break;
+	    }
+	 }
+
+	 /* Most cases the fixed function units will handle.  Cases where
+	  * one or more polygon faces are unfilled will require help:
+	  */
+	 if (key.do_unfilled) {
+	    key.clip_mode = BRW_CLIPMODE_CLIP_NON_REJECTED;
+
+	    if (offset_back || offset_front) {
+	       /* _NEW_POLYGON, _NEW_BUFFERS */
+	       key.offset_units = brw->attribs.Polygon->OffsetUnits * brw->intel.polygon_offset_scale;
+	       key.offset_factor = brw->attribs.Polygon->OffsetFactor * ctx->DrawBuffer->_MRD;
+	    }
+
+	    switch (brw->attribs.Polygon->FrontFace) {
+	    case GL_CCW:
+	       key.fill_ccw = fill_front;
+	       key.fill_cw = fill_back;
+	       key.offset_ccw = offset_front;
+	       key.offset_cw = offset_back;
+	       if (brw->attribs.Light->Model.TwoSide &&
+		   key.fill_cw != CLIP_CULL) 
+		  key.copy_bfc_cw = 1;
+	       break;
+	    case GL_CW:
+	       key.fill_cw = fill_front;
+	       key.fill_ccw = fill_back;
+	       key.offset_cw = offset_front;
+	       key.offset_ccw = offset_back;
+	       if (brw->attribs.Light->Model.TwoSide &&
+		   key.fill_ccw != CLIP_CULL) 
+		  key.copy_bfc_ccw = 1;
+	       break;
+	    }
+	 }
+      }
+   }
+
+   if (!search_cache(brw, &key))
+      compile_clip_prog( brw, &key );
+}
+
+
+const struct brw_tracked_state brw_clip_prog = {
+   .dirty = {
+      .mesa  = (_NEW_LIGHT | 
+		_NEW_TRANSFORM |
+		_NEW_POLYGON | 
+		_NEW_BUFFERS),
+      .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
+      .cache = CACHE_NEW_VS_PROG
+   },
+   .update = upload_clip_prog
+};