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    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  */
 130 static void upload_sf_prog( struct brw_context *brw )
 131 {
 132    struct brw_sf_prog_key key;
 133
 134    memset(&key, 0, sizeof(key));
 135
 136    /* Populate the key, noting state dependencies:
 137     */
 138    /* CACHE_NEW_VS_PROG */
 139    key.attrs = brw->vs.prog_data->outputs_written;
 140
 141    /* BRW_NEW_REDUCED_PRIMITIVE */
 142    switch (brw->intel.reduced_primitive) {
 143    case GL_TRIANGLES:
 144       /* NOTE: We just use the edgeflag attribute as an indicator that
 145        * unfilled triangles are active.  We don't actually do the
 146        * edgeflag testing here, it is already done in the clip
 147        * program.
 148        */
 149       if (key.attrs & (1<<VERT_RESULT_EDGE))
 150          key.primitive = SF_UNFILLED_TRIS;
 151       else
 152          key.primitive = SF_TRIANGLES;
 153       break;
 154    case GL_LINES:
 155       key.primitive = SF_LINES;
 156       break;
 157    case GL_POINTS:
 158       key.primitive = SF_POINTS;
 159       break;
 160    }
 161
 162    key.do_point_sprite = brw->attribs.Point->PointSprite;
 163    key.SpriteOrigin = brw->attribs.Point->SpriteOrigin;
 164    /* _NEW_LIGHT */
 165    key.do_flat_shading = (brw->attribs.Light->ShadeModel == GL_FLAT);
 166    key.do_twoside_color = (brw->attribs.Light->Enabled && brw->attribs.Light->Model.TwoSide);
 167
 168    /* _NEW_POLYGON */
 169    if (key.do_twoside_color)
 170       key.frontface_ccw = (brw->attribs.Polygon->FrontFace == GL_CCW);
 171
 172    dri_bo_unreference(brw->sf.prog_bo);
 173    brw->sf.prog_bo = brw_search_cache(&brw->cache, BRW_SF_PROG,
 174                                       &key, sizeof(key),
 175                                       NULL, 0,
 176                                       &brw->sf.prog_data);
 177    if (brw->sf.prog_bo == NULL)
 178       compile_sf_prog( brw, &key );
 179 }
 180
 181
 182 const struct brw_tracked_state brw_sf_prog = {
 183    .dirty = {
 184       .mesa  = (_NEW_LIGHT|_NEW_POLYGON|_NEW_POINT),
 185       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
 186       .cache = CACHE_NEW_VS_PROG
 187    },
 188    .update = upload_sf_prog
 189 };
 190