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 "glheader.h"
  34 #include "macros.h"
  35 #include "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 #define DO_SETUP_BITS ((1<<(FRAG_ATTRIB_MAX)) - 1)
  47
  48 static void compile_sf_prog( struct brw_context *brw,
  49                              struct brw_sf_prog_key *key )
  50 {
  51    struct brw_sf_compile c;
  52    const GLuint *program;
  53    GLuint program_size;
  54    GLuint i, idx;
  55
  56    memset(&c, 0, sizeof(c));
  57
  58    /* Begin the compilation:
  59     */
  60    brw_init_compile(&c.func);
  61
  62    c.key = *key;
  63    c.nr_attrs = brw_count_bits(c.key.attrs);
  64    c.nr_attr_regs = (c.nr_attrs+1)/2;
  65    c.nr_setup_attrs = brw_count_bits(c.key.attrs & DO_SETUP_BITS);
  66    c.nr_setup_regs = (c.nr_setup_attrs+1)/2;
  67
  68    c.prog_data.urb_read_length = c.nr_attr_regs;
  69    c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
  70
  71    /* Construct map from attribute number to position in the vertex.
  72     */
  73    for (i = idx = 0; i < VERT_RESULT_MAX; i++)
  74       if (c.key.attrs & (1<<i)) {
  75          c.attr_to_idx[i] = idx;
  76          c.idx_to_attr[idx] = i;
  77          if (i >= VERT_RESULT_TEX0 && i <= VERT_RESULT_TEX7) {
  78                  c.point_attrs[i].CoordReplace =
  79                         brw->attribs.Point->CoordReplace[i - VERT_RESULT_TEX0];
  80          } else
  81                  c.point_attrs[i].CoordReplace = GL_FALSE;
  82          idx++;
  83       }
  84
  85    /* Which primitive?  Or all three?
  86     */
  87    switch (key->primitive) {
  88    case SF_TRIANGLES:
  89       c.nr_verts = 3;
  90       brw_emit_tri_setup( &c );
  91       break;
  92    case SF_LINES:
  93       c.nr_verts = 2;
  94       brw_emit_line_setup( &c );
  95       break;
  96    case SF_POINTS:
  97       c.nr_verts = 1;
  98       if (key->do_point_sprite)
  99           brw_emit_point_sprite_setup( &c );
 100       else
 101           brw_emit_point_setup( &c );
 102       break;
 103    case SF_UNFILLED_TRIS:
 104       c.nr_verts = 3;
 105       brw_emit_anyprim_setup( &c );
 106       break;
 107    default:
 108       assert(0);
 109       return;
 110    }
 111
 112
 113    /* get the program
 114     */
 115    program = brw_get_program(&c.func, &program_size);
 116
 117    /* Upload
 118     */
 119    brw->sf.prog_gs_offset = brw_upload_cache( &brw->cache[BRW_SF_PROG],
 120                                               &c.key,
 121                                               sizeof(c.key),
 122                                               program,
 123                                               program_size,
 124                                               &c.prog_data,
 125                                               &brw->sf.prog_data );
 126 }
 127
 128
 129 static GLboolean search_cache( struct brw_context *brw,
 130                                struct brw_sf_prog_key *key )
 131 {
 132    return brw_search_cache(&brw->cache[BRW_SF_PROG],
 133                            key, sizeof(*key),
 134                            &brw->sf.prog_data,
 135                            &brw->sf.prog_gs_offset);
 136 }
 137
 138
 139 /* Calculate interpolants for triangle and line rasterization.
 140  */
 141 static void upload_sf_prog( struct brw_context *brw )
 142 {
 143    struct brw_sf_prog_key key;
 144
 145    memset(&key, 0, sizeof(key));
 146
 147    /* Populate the key, noting state dependencies:
 148     */
 149    /* CACHE_NEW_VS_PROG */
 150    key.attrs = brw->vs.prog_data->outputs_written;
 151
 152    /* BRW_NEW_REDUCED_PRIMITIVE */
 153    switch (brw->intel.reduced_primitive) {
 154    case GL_TRIANGLES:
 155       /* NOTE: We just use the edgeflag attribute as an indicator that
 156        * unfilled triangles are active.  We don't actually do the
 157        * edgeflag testing here, it is already done in the clip
 158        * program.
 159        */
 160       if (key.attrs & (1<<VERT_RESULT_EDGE))
 161          key.primitive = SF_UNFILLED_TRIS;
 162       else
 163          key.primitive = SF_TRIANGLES;
 164       break;
 165    case GL_LINES:
 166       key.primitive = SF_LINES;
 167       break;
 168    case GL_POINTS:
 169       key.primitive = SF_POINTS;
 170       break;
 171    }
 172
 173    key.do_point_sprite = brw->attribs.Point->PointSprite;
 174    key.SpriteOrigin = brw->attribs.Point->SpriteOrigin;
 175    /* _NEW_LIGHT */
 176    key.do_flat_shading = (brw->attribs.Light->ShadeModel == GL_FLAT);
 177    key.do_twoside_color = (brw->attribs.Light->Enabled && brw->attribs.Light->Model.TwoSide);
 178
 179    /* _NEW_POLYGON */
 180    if (key.do_twoside_color)
 181       key.frontface_ccw = (brw->attribs.Polygon->FrontFace == GL_CCW);
 182
 183
 184    if (!search_cache(brw, &key))
 185       compile_sf_prog( brw, &key );
 186 }
 187
 188
 189 const struct brw_tracked_state brw_sf_prog = {
 190    .dirty = {
 191       .mesa  = (_NEW_LIGHT|_NEW_POLYGON|_NEW_POINT),
 192       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
 193       .cache = CACHE_NEW_VS_PROG
 194    },
 195    .update = upload_sf_prog
 196 };
 197