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

   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
  46 static void compile_sf_prog( struct brw_context *brw,
  47                              struct brw_sf_prog_key *key )
  48 {
  49    struct brw_sf_compile c;
  50    const GLuint *program;
  51    GLuint program_size;
  52    GLuint i, idx;
  53
  54    memset(&c, 0, sizeof(c));
  55
  56    /* Begin the compilation:
  57     */
  58    brw_init_compile(brw, &c.func);
  59
  60    c.key = *key;
  61    c.nr_attrs = brw_count_bits(c.key.attrs);
  62    c.nr_attr_regs = (c.nr_attrs+1)/2;
  63    c.nr_setup_attrs = brw_count_bits(c.key.attrs & DO_SETUP_BITS);
  64    c.nr_setup_regs = (c.nr_setup_attrs+1)/2;
  65
  66    c.prog_data.urb_read_length = c.nr_attr_regs;
  67    c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
  68
  69    /* Construct map from attribute number to position in the vertex.
  70     */
  71    for (i = idx = 0; i < VERT_RESULT_MAX; i++)
  72       if (c.key.attrs & (1<<i)) {
  73          c.attr_to_idx[i] = idx;
  74          c.idx_to_attr[idx] = i;
  75          if (i >= VERT_RESULT_TEX0 && i <= VERT_RESULT_TEX7) {
  76                  c.point_attrs[i].CoordReplace =
  77                         brw->attribs.Point->CoordReplace[i - VERT_RESULT_TEX0];
  78          } else
  79                  c.point_attrs[i].CoordReplace = GL_FALSE;
  80          idx++;
  81       }
  82
  83    /* Which primitive?  Or all three?
  84     */
  85    switch (key->primitive) {
  86    case SF_TRIANGLES:
  87       c.nr_verts = 3;
  88       brw_emit_tri_setup( &c, GL_TRUE );
  89       break;
  90    case SF_LINES:
  91       c.nr_verts = 2;
  92       brw_emit_line_setup( &c, GL_TRUE );
  93       break;
  94    case SF_POINTS:
  95       c.nr_verts = 1;
  96       if (key->do_point_sprite)
  97           brw_emit_point_sprite_setup( &c, GL_TRUE );
  98       else
  99           brw_emit_point_setup( &c, GL_TRUE );
 100       break;
 101    case SF_UNFILLED_TRIS:
 102       c.nr_verts = 3;
 103       brw_emit_anyprim_setup( &c );
 104       break;
 105    default:
 106       assert(0);
 107       return;
 108    }
 109
 110
 111    /* get the program
 112     */
 113    program = brw_get_program(&c.func, &program_size);
 114
 115    /* Upload
 116     */
 117    dri_bo_unreference(brw->sf.prog_bo);
 118    brw->sf.prog_bo = brw_upload_cache( &brw->cache, BRW_SF_PROG,
 119                                        &c.key, sizeof(c.key),
 120                                        NULL, 0,
 121                                        program, program_size,
 122                                        &c.prog_data,
 123                                        &brw->sf.prog_data );
 124 }
 125
 126 /* Calculate interpolants for triangle and line rasterization.
 127  */
 128 static void upload_sf_prog(struct brw_context *brw)
 129 {
 130    struct brw_sf_prog_key key;
 131
 132    memset(&key, 0, sizeof(key));
 133
 134    /* Populate the key, noting state dependencies:
 135     */
 136    /* CACHE_NEW_VS_PROG */
 137    key.attrs = brw->vs.prog_data->outputs_written;
 138
 139    /* BRW_NEW_REDUCED_PRIMITIVE */
 140    switch (brw->intel.reduced_primitive) {
 141    case GL_TRIANGLES:
 142       /* NOTE: We just use the edgeflag attribute as an indicator that
 143        * unfilled triangles are active.  We don't actually do the
 144        * edgeflag testing here, it is already done in the clip
 145        * program.
 146        */
 147       if (key.attrs & (1<<VERT_RESULT_EDGE))
 148          key.primitive = SF_UNFILLED_TRIS;
 149       else
 150          key.primitive = SF_TRIANGLES;
 151       break;
 152    case GL_LINES:
 153       key.primitive = SF_LINES;
 154       break;
 155    case GL_POINTS:
 156       key.primitive = SF_POINTS;
 157       break;
 158    }
 159
 160    key.do_point_sprite = brw->attribs.Point->PointSprite;
 161    key.SpriteOrigin = brw->attribs.Point->SpriteOrigin;
 162    /* _NEW_LIGHT */
 163    key.do_flat_shading = (brw->attribs.Light->ShadeModel == GL_FLAT);
 164    key.do_twoside_color = (brw->attribs.Light->Enabled && brw->attribs.Light->Model.TwoSide);
 165
 166    /* _NEW_POLYGON */
 167    if (key.do_twoside_color)
 168       key.frontface_ccw = (brw->attribs.Polygon->FrontFace == GL_CCW);
 169
 170    dri_bo_unreference(brw->sf.prog_bo);
 171    brw->sf.prog_bo = brw_search_cache(&brw->cache, BRW_SF_PROG,
 172                                       &key, sizeof(key),
 173                                       NULL, 0,
 174                                       &brw->sf.prog_data);
 175    if (brw->sf.prog_bo == NULL)
 176       compile_sf_prog( brw, &key );
 177 }
 178
 179
 180 const struct brw_tracked_state brw_sf_prog = {
 181    .dirty = {
 182       .mesa  = (_NEW_LIGHT|_NEW_POLYGON|_NEW_POINT),
 183       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
 184       .cache = CACHE_NEW_VS_PROG
 185    },
 186    .prepare = upload_sf_prog
 187 };
 188