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 & DO_SETUP_BITS);
  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 & (1<<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( &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    GLcontext *ctx = &brw->intel.ctx;
 133    struct brw_sf_prog_key key;
 134
 135    memset(&key, 0, sizeof(key));
 136
 137    /* Populate the key, noting state dependencies:
 138     */
 139    /* CACHE_NEW_VS_PROG */
 140    key.attrs = brw->vs.prog_data->outputs_written;
 141
 142    /* BRW_NEW_REDUCED_PRIMITIVE */
 143    switch (brw->intel.reduced_primitive) {
 144    case GL_TRIANGLES:
 145       /* NOTE: We just use the edgeflag attribute as an indicator that
 146        * unfilled triangles are active.  We don't actually do the
 147        * edgeflag testing here, it is already done in the clip
 148        * program.
 149        */
 150       if (key.attrs & (1<<VERT_RESULT_EDGE))
 151          key.primitive = SF_UNFILLED_TRIS;
 152       else
 153          key.primitive = SF_TRIANGLES;
 154       break;
 155    case GL_LINES:
 156       key.primitive = SF_LINES;
 157       break;
 158    case GL_POINTS:
 159       key.primitive = SF_POINTS;
 160       break;
 161    }
 162
 163    key.do_point_sprite = ctx->Point.PointSprite;
 164    key.SpriteOrigin = ctx->Point.SpriteOrigin;
 165    /* _NEW_LIGHT */
 166    key.do_flat_shading = (ctx->Light.ShadeModel == GL_FLAT);
 167    key.do_twoside_color = (ctx->Light.Enabled && ctx->Light.Model.TwoSide);
 168
 169    /* _NEW_HINT */
 170    key.linear_color = (ctx->Hint.PerspectiveCorrection == GL_FASTEST);
 171
 172    /* _NEW_POLYGON */
 173    if (key.do_twoside_color) {
 174       /* If we're rendering to a FBO, we have to invert the polygon
 175        * face orientation, just as we invert the viewport in
 176        * sf_unit_create_from_key().  ctx->DrawBuffer->Name will be
 177        * nonzero if we're rendering to such an FBO.
 178        */
 179       key.frontface_ccw = (ctx->Polygon.FrontFace == GL_CCW) ^ (ctx->DrawBuffer->Name != 0);
 180    }
 181
 182    dri_bo_unreference(brw->sf.prog_bo);
 183    brw->sf.prog_bo = brw_search_cache(&brw->cache, BRW_SF_PROG,
 184                                       &key, sizeof(key),
 185                                       NULL, 0,
 186                                       &brw->sf.prog_data);
 187    if (brw->sf.prog_bo == NULL)
 188       compile_sf_prog( brw, &key );
 189 }
 190
 191
 192 const struct brw_tracked_state brw_sf_prog = {
 193    .dirty = {
 194       .mesa  = (_NEW_HINT | _NEW_LIGHT | _NEW_POLYGON | _NEW_POINT),
 195       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
 196       .cache = CACHE_NEW_VS_PROG
 197    },
 198    .prepare = upload_sf_prog
 199 };
 200