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    struct brw_sf_compile c;
  50    const GLuint *program;
  51    GLuint program_size;
  52    GLuint i, idx;
  53
  54    memset(&c, 0, sizeof(c));
  55
  56    /* Begin the compilation:
  57     */
  58    brw_init_compile(brw, &c.func);
  59
  60    c.key = *key;
  61    c.nr_attrs = brw_count_bits(c.key.attrs);
  62    c.nr_attr_regs = (c.nr_attrs+1)/2;
  63    c.nr_setup_attrs = brw_count_bits(c.key.attrs);
  64    c.nr_setup_regs = (c.nr_setup_attrs+1)/2;
  65
  66    c.prog_data.urb_read_length = c.nr_attr_regs;
  67    c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
  68
  69    /* Construct map from attribute number to position in the vertex.
  70     */
  71    for (i = idx = 0; i < VERT_RESULT_MAX; i++) {
  72       if (c.key.attrs & BITFIELD64_BIT(i)) {
  73          c.attr_to_idx[i] = idx;
  74          c.idx_to_attr[idx] = i;
  75          idx++;
  76       }
  77    }
  78
  79    /* Which primitive?  Or all three?
  80     */
  81    switch (key->primitive) {
  82    case SF_TRIANGLES:
  83       c.nr_verts = 3;
  84       brw_emit_tri_setup( &c, GL_TRUE );
  85       break;
  86    case SF_LINES:
  87       c.nr_verts = 2;
  88       brw_emit_line_setup( &c, GL_TRUE );
  89       break;
  90    case SF_POINTS:
  91       c.nr_verts = 1;
  92       if (key->do_point_sprite)
  93           brw_emit_point_sprite_setup( &c, GL_TRUE );
  94       else
  95           brw_emit_point_setup( &c, GL_TRUE );
  96       break;
  97    case SF_UNFILLED_TRIS:
  98       c.nr_verts = 3;
  99       brw_emit_anyprim_setup( &c );
 100       break;
 101    default:
 102       assert(0);
 103       return;
 104    }
 105
 106    /* get the program
 107     */
 108    program = brw_get_program(&c.func, &program_size);
 109
 110    /* Upload
 111     */
 112    dri_bo_unreference(brw->sf.prog_bo);
 113    brw->sf.prog_bo = brw_upload_cache_with_auxdata(&brw->cache, BRW_SF_PROG,
 114                                                    &c.key, sizeof(c.key),
 115                                                    NULL, 0,
 116                                                    program, program_size,
 117                                                    &c.prog_data,
 118                                                    sizeof(c.prog_data),
 119                                                    &brw->sf.prog_data);
 120 }
 121
 122 /* Calculate interpolants for triangle and line rasterization.
 123  */
 124 static void upload_sf_prog(struct brw_context *brw)
 125 {
 126    GLcontext *ctx = &brw->intel.ctx;
 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 & BITFIELD64_BIT(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    if (key.do_point_sprite) {
 159       int i;
 160
 161       for (i = 0; i < 8; i++) {
 162          if (ctx->Point.CoordReplace[i])
 163             key.point_sprite_coord_replace |= (1 << i);
 164       }
 165    }
 166    key.sprite_origin_lower_left = (ctx->Point.SpriteOrigin == GL_LOWER_LEFT);
 167    /* _NEW_LIGHT */
 168    key.do_flat_shading = (ctx->Light.ShadeModel == GL_FLAT);
 169    key.do_twoside_color = (ctx->Light.Enabled && ctx->Light.Model.TwoSide);
 170
 171    /* _NEW_HINT */
 172    key.linear_color = (ctx->Hint.PerspectiveCorrection == GL_FASTEST);
 173
 174    /* _NEW_POLYGON */
 175    if (key.do_twoside_color) {
 176       /* If we're rendering to a FBO, we have to invert the polygon
 177        * face orientation, just as we invert the viewport in
 178        * sf_unit_create_from_key().  ctx->DrawBuffer->Name will be
 179        * nonzero if we're rendering to such an FBO.
 180        */
 181       key.frontface_ccw = (ctx->Polygon.FrontFace == GL_CCW) ^ (ctx->DrawBuffer->Name != 0);
 182    }
 183
 184    dri_bo_unreference(brw->sf.prog_bo);
 185    brw->sf.prog_bo = brw_search_cache(&brw->cache, BRW_SF_PROG,
 186                                       &key, sizeof(key),
 187                                       NULL, 0,
 188                                       &brw->sf.prog_data);
 189    if (brw->sf.prog_bo == NULL)
 190       compile_sf_prog( brw, &key );
 191 }
 192
 193
 194 const struct brw_tracked_state brw_sf_prog = {
 195    .dirty = {
 196       .mesa  = (_NEW_HINT | _NEW_LIGHT | _NEW_POLYGON | _NEW_POINT),
 197       .brw   = (BRW_NEW_REDUCED_PRIMITIVE),
 198       .cache = CACHE_NEW_VS_PROG
 199    },
 200    .prepare = upload_sf_prog
 201 };
 202