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    GLcontext *ctx = &brw->intel.ctx;
  50    struct brw_sf_compile c;
  51    const GLuint *program;
  52    GLuint program_size;
  53    GLuint i, idx;
  54
  55    memset(&c, 0, sizeof(c));
  56
  57    /* Begin the compilation:
  58     */
  59    brw_init_compile(brw, &c.func);
  60
  61    c.key = *key;
  62    c.nr_attrs = brw_count_bits(c.key.attrs);
  63    c.nr_attr_regs = (c.nr_attrs+1)/2;
  64    c.nr_setup_attrs = brw_count_bits(c.key.attrs);
  65    c.nr_setup_regs = (c.nr_setup_attrs+1)/2;
  66
  67    c.prog_data.urb_read_length = c.nr_attr_regs;
  68    c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
  69
  70    /* Construct map from attribute number to position in the vertex.
  71     */
  72    for (i = idx = 0; i < VERT_RESULT_MAX; i++)
  73       if (c.key.attrs & BITFIELD64_BIT(i)) {
  74          c.attr_to_idx[i] = idx;
  75          c.idx_to_attr[idx] = i;
  76          if (i >= VERT_RESULT_TEX0 && i <= VERT_RESULT_TEX7) {
  77             c.point_attrs[i].CoordReplace =
  78                ctx->Point.CoordReplace[i - VERT_RESULT_TEX0];
  79          }
  80          else {
  81             c.point_attrs[i].CoordReplace = GL_FALSE;
  82          }
  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, GL_TRUE );
  92       break;
  93    case SF_LINES:
  94       c.nr_verts = 2;
  95       brw_emit_line_setup( &c, GL_TRUE );
  96       break;
  97    case SF_POINTS:
  98       c.nr_verts = 1;
  99       if (key->do_point_sprite)
 100           brw_emit_point_sprite_setup( &c, GL_TRUE );
 101       else
 102           brw_emit_point_setup( &c, GL_TRUE );
 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    /* 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_with_auxdata(&brw->cache, BRW_SF_PROG,
 121                                                    &c.key, sizeof(c.key),
 122                                                    NULL, 0,
 123                                                    program, program_size,
 124                                                    &c.prog_data,
 125                                                    sizeof(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    GLcontext *ctx = &brw->intel.ctx;
 134    struct brw_sf_prog_key key;
 135
 136    memset(&key, 0, sizeof(key));
 137
 138    /* Populate the key, noting state dependencies:
 139     */
 140    /* CACHE_NEW_VS_PROG */
 141    key.attrs = brw->vs.prog_data->outputs_written;
 142
 143    /* BRW_NEW_REDUCED_PRIMITIVE */
 144    switch (brw->intel.reduced_primitive) {
 145    case GL_TRIANGLES:
 146       /* NOTE: We just use the edgeflag attribute as an indicator that
 147        * unfilled triangles are active.  We don't actually do the
 148        * edgeflag testing here, it is already done in the clip
 149        * program.
 150        */
 151       if (key.attrs & BITFIELD64_BIT(VERT_RESULT_EDGE))
 152          key.primitive = SF_UNFILLED_TRIS;
 153       else
 154          key.primitive = SF_TRIANGLES;
 155       break;
 156    case GL_LINES:
 157       key.primitive = SF_LINES;
 158       break;
 159    case GL_POINTS:
 160       key.primitive = SF_POINTS;
 161       break;
 162    }
 163
 164    key.do_point_sprite = ctx->Point.PointSprite;
 165    key.sprite_origin_lower_left = (ctx->Point.SpriteOrigin == GL_LOWER_LEFT);
 166    /* _NEW_LIGHT */
 167    key.do_flat_shading = (ctx->Light.ShadeModel == GL_FLAT);
 168    key.do_twoside_color = (ctx->Light.Enabled && ctx->Light.Model.TwoSide);
 169
 170    /* _NEW_HINT */
 171    key.linear_color = (ctx->Hint.PerspectiveCorrection == GL_FASTEST);
 172
 173    /* _NEW_POLYGON */
 174    if (key.do_twoside_color) {
 175       /* If we're rendering to a FBO, we have to invert the polygon
 176        * face orientation, just as we invert the viewport in
 177        * sf_unit_create_from_key().  ctx->DrawBuffer->Name will be
 178        * nonzero if we're rendering to such an FBO.
 179        */
 180       key.frontface_ccw = (ctx->Polygon.FrontFace == GL_CCW) ^ (ctx->DrawBuffer->Name != 0);
 181    }
 182
 183    dri_bo_unreference(brw->sf.prog_bo);
 184    brw->sf.prog_bo = brw_search_cache(&brw->cache, BRW_SF_PROG,
 185                                       &key, sizeof(key),
 186                                       NULL, 0,
 187                                       &brw->sf.prog_data);
 188    if (brw->sf.prog_bo == NULL)
 189       compile_sf_prog( brw, &key );
 190 }
 191
 192
 193 const struct brw_tracked_state brw_sf_prog = {
 194    .dirty = {
 195       .mesa  = (_NEW_HINT | _NEW_LIGHT | _NEW_POLYGON | _NEW_POINT),
 196       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
 197       .cache = CACHE_NEW_VS_PROG
 198    },
 199    .prepare = upload_sf_prog
 200 };
 201