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

   1
   2 /*
   3  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   4  Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
   5  develop this 3D driver.
   6
   7  Permission is hereby granted, free of charge, to any person obtaining
   8  a copy of this software and associated documentation files (the
   9  "Software"), to deal in the Software without restriction, including
  10  without limitation the rights to use, copy, modify, merge, publish,
  11  distribute, sublicense, and/or sell copies of the Software, and to
  12  permit persons to whom the Software is furnished to do so, subject to
  13  the following conditions:
  14
  15  The above copyright notice and this permission notice (including the
  16  next paragraph) shall be included in all copies or substantial
  17  portions of the Software.
  18
  19  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  20  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  22  IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  23  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  24  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  25  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26
  27  **********************************************************************/
  28  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   */
  32
  33
  34 #include "glheader.h"
  35 #include "macros.h"
  36 #include "enums.h"
  37
  38 #include "intel_batchbuffer.h"
  39
  40 #include "brw_defines.h"
  41 #include "brw_context.h"
  42 #include "brw_eu.h"
  43 #include "brw_util.h"
  44 #include "brw_sf.h"
  45 #include "brw_state.h"
  46
  47 #define DO_SETUP_BITS ((1<<(FRAG_ATTRIB_MAX)) - 1)
  48
  49 static void compile_sf_prog( struct brw_context *brw,
  50                              struct brw_sf_prog_key *key )
  51 {
  52    struct brw_sf_compile c;
  53    const GLuint *program;
  54    GLuint program_size;
  55    GLuint i, idx;
  56
  57    memset(&c, 0, sizeof(c));
  58
  59    /* Begin the compilation:
  60     */
  61    brw_init_compile(&c.func);
  62
  63    c.key = *key;
  64    c.nr_attrs = brw_count_bits(c.key.attrs);
  65    c.nr_attr_regs = (c.nr_attrs+1)/2;
  66    c.nr_setup_attrs = brw_count_bits(c.key.attrs & DO_SETUP_BITS);
  67    c.nr_setup_regs = (c.nr_setup_attrs+1)/2;
  68
  69    c.prog_data.urb_read_length = c.nr_attr_regs;
  70    c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
  71
  72    /* Construct map from attribute number to position in the vertex.
  73     */
  74    for (i = idx = 0; i < VERT_RESULT_MAX; i++)
  75       if (c.key.attrs & (1<<i)) {
  76          c.attr_to_idx[i] = idx;
  77          c.idx_to_attr[idx] = i;
  78          if (i >= VERT_RESULT_TEX0 && i <= VERT_RESULT_TEX7) {
  79                  c.point_attrs[i].CoordReplace =
  80                         brw->attribs.Point->CoordReplace[i - VERT_RESULT_TEX0];
  81          } else
  82                  c.point_attrs[i].CoordReplace = GL_FALSE;
  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 );
  92       break;
  93    case SF_LINES:
  94       c.nr_verts = 2;
  95       brw_emit_line_setup( &c );
  96       break;
  97    case SF_POINTS:
  98       c.nr_verts = 1;
  99       if (key->do_point_sprite)
 100           brw_emit_point_sprite_setup( &c );
 101       else
 102           brw_emit_point_setup( &c );
 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
 114    /* get the program
 115     */
 116    program = brw_get_program(&c.func, &program_size);
 117
 118    /* Upload
 119     */
 120    brw->sf.prog_gs_offset = brw_upload_cache( &brw->cache[BRW_SF_PROG],
 121                                               &c.key,
 122                                               sizeof(c.key),
 123                                               program,
 124                                               program_size,
 125                                               &c.prog_data,
 126                                               &brw->sf.prog_data );
 127 }
 128
 129 /* Calculate interpolants for triangle and line rasterization.
 130  */
 131 static void upload_sf_prog( struct brw_context *brw )
 132 {
 133    struct brw_sf_prog_key key;
 134    struct brw_sf_prog_data *prog_data;
 135    uint32_t offset;
 136
 137    memset(&key, 0, sizeof(key));
 138
 139    /* Populate the key, noting state dependencies:
 140     */
 141    /* CACHE_NEW_VS_PROG */
 142    key.attrs = brw->vs.prog_data->outputs_written;
 143
 144    /* BRW_NEW_REDUCED_PRIMITIVE */
 145    switch (brw->intel.reduced_primitive) {
 146    case GL_TRIANGLES:
 147       /* NOTE: We just use the edgeflag attribute as an indicator that
 148        * unfilled triangles are active.  We don't actually do the
 149        * edgeflag testing here, it is already done in the clip
 150        * program.
 151        */
 152       if (key.attrs & (1<<VERT_RESULT_EDGE))
 153          key.primitive = SF_UNFILLED_TRIS;
 154       else
 155          key.primitive = SF_TRIANGLES;
 156       break;
 157    case GL_LINES:
 158       key.primitive = SF_LINES;
 159       break;
 160    case GL_POINTS:
 161       key.primitive = SF_POINTS;
 162       break;
 163    }
 164
 165    key.do_point_sprite = brw->attribs.Point->PointSprite;
 166    key.SpriteOrigin = brw->attribs.Point->SpriteOrigin;
 167    /* _NEW_LIGHT */
 168    key.do_flat_shading = (brw->attribs.Light->ShadeModel == GL_FLAT);
 169    key.do_twoside_color = (brw->attribs.Light->Enabled && brw->attribs.Light->Model.TwoSide);
 170
 171    /* _NEW_POLYGON */
 172    if (key.do_twoside_color)
 173       key.frontface_ccw = (brw->attribs.Polygon->FrontFace == GL_CCW);
 174
 175    if (brw_search_cache(&brw->cache[BRW_SF_PROG],
 176                         &key, sizeof(key),
 177                         &prog_data,
 178                         &offset)) {
 179       if (offset != brw->sf.prog_gs_offset ||
 180           !brw->sf.prog_data ||
 181           memcmp(prog_data, &brw->sf.prog_data,
 182                  sizeof(*brw->sf.prog_data)) != 0)
 183       {
 184          brw->sf.prog_gs_offset = offset;
 185          brw->sf.prog_data = prog_data;
 186          brw->state.dirty.cache |= CACHE_NEW_SF_PROG;
 187       }
 188    } else {
 189       compile_sf_prog( brw, &key );
 190       brw->state.dirty.cache |= CACHE_NEW_SF_PROG;
 191    }
 192 }
 193
 194
 195 const struct brw_tracked_state brw_sf_prog = {
 196    .dirty = {
 197       .mesa  = (_NEW_LIGHT|_NEW_POLYGON|_NEW_POINT),
 198       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
 199       .cache = CACHE_NEW_VS_PROG
 200    },
 201    .update = upload_sf_prog
 202 };
 203