src/mesa/drivers/dri/i965/brw_wm_iz.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/mtypes.h"
  34 #include "brw_wm.h"
  35
  36
  37 #undef P                        /* prompted depth */
  38 #undef C                        /* computed */
  39 #undef N                        /* non-promoted? */
  40
  41 #define P 0
  42 #define C 1
  43 #define N 2
  44
  45 const struct {
  46    GLuint mode:2;
  47    GLuint sd_present:1;
  48    GLuint sd_to_rt:1;
  49    GLuint dd_present:1;
  50    GLuint ds_present:1;
  51 } wm_iz_table[IZ_BIT_MAX] =
  52 {
  53  { P, 0, 0, 0, 0 },
  54  { P, 0, 0, 0, 0 },
  55  { P, 0, 0, 0, 0 },
  56  { P, 0, 0, 0, 0 },
  57  { P, 0, 0, 0, 0 },
  58  { N, 1, 1, 0, 0 },
  59  { N, 0, 1, 0, 0 },
  60  { N, 0, 1, 0, 0 },
  61  { P, 0, 0, 0, 0 },
  62  { P, 0, 0, 0, 0 },
  63  { C, 0, 1, 1, 0 },
  64  { C, 0, 1, 1, 0 },
  65  { P, 0, 0, 0, 0 },
  66  { N, 1, 1, 0, 0 },
  67  { C, 0, 1, 1, 0 },
  68  { C, 0, 1, 1, 0 },
  69  { P, 0, 0, 0, 0 },
  70  { P, 0, 0, 0, 0 },
  71  { P, 0, 0, 0, 0 },
  72  { P, 0, 0, 0, 0 },
  73  { P, 0, 0, 0, 0 },
  74  { N, 1, 1, 0, 0 },
  75  { N, 0, 1, 0, 0 },
  76  { N, 0, 1, 0, 0 },
  77  { P, 0, 0, 0, 0 },
  78  { P, 0, 0, 0, 0 },
  79  { C, 0, 1, 1, 0 },
  80  { C, 0, 1, 1, 0 },
  81  { P, 0, 0, 0, 0 },
  82  { N, 1, 1, 0, 0 },
  83  { C, 0, 1, 1, 0 },
  84  { C, 0, 1, 1, 0 },
  85  { P, 0, 0, 0, 0 },
  86  { P, 0, 0, 0, 0 },
  87  { P, 0, 0, 0, 0 },
  88  { P, 0, 0, 0, 0 },
  89  { P, 0, 0, 0, 0 },
  90  { N, 1, 1, 0, 1 },
  91  { N, 0, 1, 0, 1 },
  92  { N, 0, 1, 0, 1 },
  93  { P, 0, 0, 0, 0 },
  94  { P, 0, 0, 0, 0 },
  95  { C, 0, 1, 1, 1 },
  96  { C, 0, 1, 1, 1 },
  97  { P, 0, 0, 0, 0 },
  98  { N, 1, 1, 0, 1 },
  99  { C, 0, 1, 1, 1 },
 100  { C, 0, 1, 1, 1 },
 101  { P, 0, 0, 0, 0 },
 102  { C, 0, 0, 0, 1 },
 103  { P, 0, 0, 0, 0 },
 104  { C, 0, 1, 0, 1 },
 105  { P, 0, 0, 0, 0 },
 106  { C, 1, 1, 0, 1 },
 107  { C, 0, 1, 0, 1 },
 108  { C, 0, 1, 0, 1 },
 109  { P, 0, 0, 0, 0 },
 110  { C, 1, 1, 1, 1 },
 111  { C, 0, 1, 1, 1 },
 112  { C, 0, 1, 1, 1 },
 113  { P, 0, 0, 0, 0 },
 114  { C, 1, 1, 1, 1 },
 115  { C, 0, 1, 1, 1 },
 116  { C, 0, 1, 1, 1 }
 117 };
 118
 119 void brw_wm_lookup_iz( GLuint line_aa,
 120                        GLuint lookup,
 121                        GLboolean ps_uses_depth,
 122                        struct brw_wm_prog_key *key )
 123 {
 124    GLuint reg = 2;
 125
 126    assert (lookup < IZ_BIT_MAX);
 127
 128    if (lookup & IZ_PS_COMPUTES_DEPTH_BIT)
 129       key->computes_depth = 1;
 130
 131    if (wm_iz_table[lookup].sd_present || ps_uses_depth) {
 132       key->source_depth_reg = reg;
 133       reg += 2;
 134    }
 135
 136    if (wm_iz_table[lookup].sd_to_rt)
 137       key->source_depth_to_render_target = 1;
 138
 139    if (wm_iz_table[lookup].ds_present || line_aa != AA_NEVER) {
 140       key->aa_dest_stencil_reg = reg;
 141       key->runtime_check_aads_emit = (!wm_iz_table[lookup].ds_present &&
 142                                       line_aa == AA_SOMETIMES);
 143       reg++;
 144    }
 145
 146    if (wm_iz_table[lookup].dd_present) {
 147       key->dest_depth_reg = reg;
 148       reg+=2;
 149    }
 150
 151    key->nr_depth_regs = (reg+1)/2;
 152 }
 153