brw_sf.c revision 052c1d66a1ab1f2665870dc77dab28d20416cdf1 
1/*
2 Copyright (C) Intel Corp.  2006.  All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
4 develop this 3D driver.
5
6 Permission is hereby granted, free of charge, to any person obtaining
7 a copy of this software and associated documentation files (the
8 "Software"), to deal in the Software without restriction, including
9 without limitation the rights to use, copy, modify, merge, publish,
10 distribute, sublicense, and/or sell copies of the Software, and to
11 permit persons to whom the Software is furnished to do so, subject to
12 the following conditions:
13
14 The above copyright notice and this permission notice (including the
15 next paragraph) shall be included in all copies or substantial
16 portions of the Software.
17
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25
26 **********************************************************************/
27 /*
28  * Authors:
29  *   Keith Whitwell <keith@tungstengraphics.com>
30  */
31
32
33#include "main/glheader.h"
34#include "main/macros.h"
35#include "main/enums.h"
36
37#include "intel_batchbuffer.h"
38
39#include "brw_defines.h"
40#include "brw_context.h"
41#include "brw_eu.h"
42#include "brw_util.h"
43#include "brw_sf.h"
44#include "brw_state.h"
45
46static void compile_sf_prog( struct brw_context *brw,
47			     struct brw_sf_prog_key *key )
48{
49   GLcontext *ctx = &brw->intel.ctx;
50   struct brw_sf_compile c;
51   const GLuint *program;
52   GLuint program_size;
53   GLuint i, idx;
54
55   memset(&c, 0, sizeof(c));
56
57   /* Begin the compilation:
58    */
59   brw_init_compile(brw, &c.func);
60
61   c.key = *key;
62   c.nr_attrs = brw_count_bits(c.key.attrs);
63   c.nr_attr_regs = (c.nr_attrs+1)/2;
64   c.nr_setup_attrs = brw_count_bits(c.key.attrs & DO_SETUP_BITS);
65   c.nr_setup_regs = (c.nr_setup_attrs+1)/2;
66
67   c.prog_data.urb_read_length = c.nr_attr_regs;
68   c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
69
70   /* Construct map from attribute number to position in the vertex.
71    */
72   for (i = idx = 0; i < VERT_RESULT_MAX; i++)
73      if (c.key.attrs & (1<<i)) {
74	 c.attr_to_idx[i] = idx;
75	 c.idx_to_attr[idx] = i;
76	 if (i >= VERT_RESULT_TEX0 && i <= VERT_RESULT_TEX7) {
77            c.point_attrs[i].CoordReplace =
78               ctx->Point.CoordReplace[i - VERT_RESULT_TEX0];
79	 }
80         else {
81            c.point_attrs[i].CoordReplace = GL_FALSE;
82         }
83	 idx++;
84      }
85
86   /* Which primitive?  Or all three?
87    */
88   switch (key->primitive) {
89   case SF_TRIANGLES:
90      c.nr_verts = 3;
91      brw_emit_tri_setup( &c, GL_TRUE );
92      break;
93   case SF_LINES:
94      c.nr_verts = 2;
95      brw_emit_line_setup( &c, GL_TRUE );
96      break;
97   case SF_POINTS:
98      c.nr_verts = 1;
99      if (key->do_point_sprite)
100	  brw_emit_point_sprite_setup( &c, GL_TRUE );
101      else
102	  brw_emit_point_setup( &c, GL_TRUE );
103      break;
104   case SF_UNFILLED_TRIS:
105      c.nr_verts = 3;
106      brw_emit_anyprim_setup( &c );
107      break;
108   default:
109      assert(0);
110      return;
111   }
112
113   /* get the program
114    */
115   program = brw_get_program(&c.func, &program_size);
116
117   /* Upload
118    */
119   dri_bo_unreference(brw->sf.prog_bo);
120   brw->sf.prog_bo = brw_upload_cache( &brw->cache, BRW_SF_PROG,
121				       &c.key, sizeof(c.key),
122				       NULL, 0,
123				       program, program_size,
124				       &c.prog_data,
125				       &brw->sf.prog_data );
126}
127
128/* Calculate interpolants for triangle and line rasterization.
129 */
130static void upload_sf_prog(struct brw_context *brw)
131{
132   GLcontext *ctx = &brw->intel.ctx;
133   struct brw_sf_prog_key key;
134
135   memset(&key, 0, sizeof(key));
136
137   /* Populate the key, noting state dependencies:
138    */
139   /* CACHE_NEW_VS_PROG */
140   key.attrs = brw->vs.prog_data->outputs_written;
141
142   /* BRW_NEW_REDUCED_PRIMITIVE */
143   switch (brw->intel.reduced_primitive) {
144   case GL_TRIANGLES:
145      /* NOTE: We just use the edgeflag attribute as an indicator that
146       * unfilled triangles are active.  We don't actually do the
147       * edgeflag testing here, it is already done in the clip
148       * program.
149       */
150      if (key.attrs & (1<<VERT_RESULT_EDGE))
151	 key.primitive = SF_UNFILLED_TRIS;
152      else
153	 key.primitive = SF_TRIANGLES;
154      break;
155   case GL_LINES:
156      key.primitive = SF_LINES;
157      break;
158   case GL_POINTS:
159      key.primitive = SF_POINTS;
160      break;
161   }
162
163   key.do_point_sprite = ctx->Point.PointSprite;
164   key.SpriteOrigin = ctx->Point.SpriteOrigin;
165   /* _NEW_LIGHT */
166   key.do_flat_shading = (ctx->Light.ShadeModel == GL_FLAT);
167   key.do_twoside_color = (ctx->Light.Enabled && ctx->Light.Model.TwoSide);
168
169   /* _NEW_POLYGON */
170   if (key.do_twoside_color)
171      key.frontface_ccw = (ctx->Polygon.FrontFace == GL_CCW);
172
173   dri_bo_unreference(brw->sf.prog_bo);
174   brw->sf.prog_bo = brw_search_cache(&brw->cache, BRW_SF_PROG,
175				      &key, sizeof(key),
176				      NULL, 0,
177				      &brw->sf.prog_data);
178   if (brw->sf.prog_bo == NULL)
179      compile_sf_prog( brw, &key );
180}
181
182
183const struct brw_tracked_state brw_sf_prog = {
184   .dirty = {
185      .mesa  = (_NEW_LIGHT|_NEW_POLYGON|_NEW_POINT),
186      .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
187      .cache = CACHE_NEW_VS_PROG
188   },
189   .prepare = upload_sf_prog
190};
191
192