src/gallium/drivers/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 "brw_batchbuffer.h"
  34
  35 #include "brw_defines.h"
  36 #include "brw_context.h"
  37 #include "brw_eu.h"
  38 #include "brw_util.h"
  39 #include "brw_sf.h"
  40 #include "brw_state.h"
  41
  42 static void compile_sf_prog( struct brw_context *brw,
  43                              struct brw_sf_prog_key *key )
  44 {
  45    struct brw_sf_compile c;
  46    const GLuint *program;
  47    GLuint program_size;
  48    GLuint i, idx;
  49
  50    memset(&c, 0, sizeof(c));
  51
  52    /* Begin the compilation:
  53     */
  54    brw_init_compile(brw, &c.func);
  55
  56    c.key = *key;
  57    c.nr_attrs = util_count_bits(c.key.attrs);
  58    c.nr_attr_regs = (c.nr_attrs+1)/2;
  59    c.nr_setup_attrs = c.key.nr_attrs;
  60    c.nr_setup_regs = (c.nr_setup_attrs+1)/2;
  61
  62    c.prog_data.urb_read_length = c.nr_attr_regs;
  63    c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
  64
  65    /* Construct map from attribute number to position in the vertex.
  66     */
  67    for (i = idx = 0; i < VERT_RESULT_MAX; i++)
  68       if (c.key.attrs & (1<<i)) {
  69          c.attr_to_idx[i] = idx;
  70          c.idx_to_attr[idx] = i;
  71          if (i >= VERT_RESULT_TEX0 && i <= VERT_RESULT_TEX7) {
  72             c.point_attrs[i].CoordReplace =
  73                ctx->Point.CoordReplace[i - VERT_RESULT_TEX0];
  74          }
  75          else {
  76             c.point_attrs[i].CoordReplace = GL_FALSE;
  77          }
  78          idx++;
  79       }
  80
  81    /* Which primitive?  Or all three?
  82     */
  83    switch (key->primitive) {
  84    case SF_TRIANGLES:
  85       c.nr_verts = 3;
  86       brw_emit_tri_setup( &c, GL_TRUE );
  87       break;
  88    case SF_LINES:
  89       c.nr_verts = 2;
  90       brw_emit_line_setup( &c, GL_TRUE );
  91       break;
  92    case SF_POINTS:
  93       c.nr_verts = 1;
  94       if (key->do_point_sprite)
  95           brw_emit_point_sprite_setup( &c, GL_TRUE );
  96       else
  97           brw_emit_point_setup( &c, GL_TRUE );
  98       break;
  99    case SF_UNFILLED_TRIS:
 100       c.nr_verts = 3;
 101       brw_emit_anyprim_setup( &c );
 102       break;
 103    default:
 104       assert(0);
 105       return;
 106    }
 107
 108    /* get the program
 109     */
 110    program = brw_get_program(&c.func, &program_size);
 111
 112    /* Upload
 113     */
 114    brw->sws->bo_unreference(brw->sf.prog_bo);
 115    brw->sf.prog_bo = brw_upload_cache( &brw->cache, BRW_SF_PROG,
 116                                        &c.key, sizeof(c.key),
 117                                        NULL, 0,
 118                                        program, program_size,
 119                                        &c.prog_data,
 120                                        &brw->sf.prog_data );
 121 }
 122
 123 /* Calculate interpolants for triangle and line rasterization.
 124  */
 125 static void upload_sf_prog(struct brw_context *brw)
 126 {
 127    struct brw_sf_prog_key key;
 128
 129    memset(&key, 0, sizeof(key));
 130
 131    /* Populate the key, noting state dependencies:
 132     */
 133    /* CACHE_NEW_VS_PROG */
 134    key.attrs = brw->vs.prog_data->outputs_written;
 135
 136    /* BRW_NEW_REDUCED_PRIMITIVE */
 137    switch (brw->intel.reduced_primitive) {
 138    case GL_TRIANGLES:
 139       /* NOTE: We just use the edgeflag attribute as an indicator that
 140        * unfilled triangles are active.  We don't actually do the
 141        * edgeflag testing here, it is already done in the clip
 142        * program.
 143        */
 144       if (key.attrs & (1<<VERT_RESULT_EDGE))
 145          key.primitive = SF_UNFILLED_TRIS;
 146       else
 147          key.primitive = SF_TRIANGLES;
 148       break;
 149    case GL_LINES:
 150       key.primitive = SF_LINES;
 151       break;
 152    case GL_POINTS:
 153       key.primitive = SF_POINTS;
 154       break;
 155    }
 156
 157    key.do_point_sprite = ctx->Point.PointSprite;
 158    key.SpriteOrigin = ctx->Point.SpriteOrigin;
 159    /* _NEW_LIGHT */
 160    key.do_flat_shading = (ctx->Light.ShadeModel == GL_FLAT);
 161    key.do_twoside_color = (ctx->Light.Enabled && ctx->Light.Model.TwoSide);
 162
 163    /* _NEW_HINT */
 164    key.linear_color = 0;
 165
 166    /* _NEW_POLYGON */
 167    if (key.do_twoside_color) {
 168       /* If we're rendering to a FBO, we have to invert the polygon
 169        * face orientation, just as we invert the viewport in
 170        * sf_unit_create_from_key().  ctx->DrawBuffer->Name will be
 171        * nonzero if we're rendering to such an FBO.
 172        */
 173       key.frontface_ccw = (ctx->Polygon.FrontFace == GL_CCW) ^ (ctx->DrawBuffer->Name != 0);
 174    }
 175
 176    brw->sws->bo_unreference(brw->sf.prog_bo);
 177    brw->sf.prog_bo = brw_search_cache(&brw->cache, BRW_SF_PROG,
 178                                       &key, sizeof(key),
 179                                       NULL, 0,
 180                                       &brw->sf.prog_data);
 181    if (brw->sf.prog_bo == NULL)
 182       compile_sf_prog( brw, &key );
 183 }
 184
 185
 186 const struct brw_tracked_state brw_sf_prog = {
 187    .dirty = {
 188       .mesa  = (_NEW_HINT | _NEW_LIGHT | _NEW_POLYGON | _NEW_POINT),
 189       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
 190       .cache = CACHE_NEW_VS_PROG
 191    },
 192    .prepare = upload_sf_prog
 193 };
 194