src/gallium/drivers/i965/brw_cc.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_context.h"
  34 #include "brw_state.h"
  35 #include "brw_defines.h"
  36
  37
  38 struct sane_viewport {
  39    float top;
  40    float left;
  41    float width;
  42    float height;
  43    float near;
  44    float far;
  45 };
  46
  47 static void calc_sane_viewport( const struct pipe_viewport_state *vp,
  48                                 struct sane_viewport *svp )
  49 {
  50    /* XXX fix me, obviously.
  51     */
  52    svp->top = 0;
  53    svp->left = 0;
  54    svp->width = 250;
  55    svp->height = 250;
  56    svp->near = 0;
  57    svp->far = 1;
  58 }
  59
  60 static int prepare_cc_vp( struct brw_context *brw )
  61 {
  62    struct brw_cc_viewport ccv;
  63    struct sane_viewport svp;
  64
  65    memset(&ccv, 0, sizeof(ccv));
  66
  67    /* PIPE_NEW_VIEWPORT */
  68    calc_sane_viewport( &brw->curr.vp, &svp );
  69
  70    ccv.min_depth = svp.near;
  71    ccv.max_depth = svp.far;
  72
  73    brw->sws->bo_unreference(brw->cc.vp_bo);
  74    brw->cc.vp_bo = brw_cache_data( &brw->cache, BRW_CC_VP, &ccv, NULL, 0 );
  75
  76    return 0;
  77 }
  78
  79 const struct brw_tracked_state brw_cc_vp = {
  80    .dirty = {
  81       .mesa = PIPE_NEW_VIEWPORT,
  82       .brw = BRW_NEW_CONTEXT,
  83       .cache = 0
  84    },
  85    .prepare = prepare_cc_vp
  86 };
  87
  88 struct brw_cc_unit_key {
  89    struct brw_cc0 cc0;
  90    struct brw_cc1 cc1;
  91    struct brw_cc2 cc2;
  92    struct brw_cc3 cc3;
  93    struct brw_cc5 cc5;
  94    struct brw_cc6 cc6;
  95    struct brw_cc7 cc7;
  96 };
  97
  98 /* A long-winded way to OR two unsigned integers together:
  99  */
 100 static INLINE struct brw_cc3
 101 combine_cc3( struct brw_cc3 a, struct brw_cc3 b )
 102 {
 103    union { struct brw_cc3 cc3; unsigned i; } ca, cb;
 104    ca.cc3 = a;
 105    cb.cc3 = b;
 106    ca.i |= cb.i;
 107    return ca.cc3;
 108 }
 109
 110 static void
 111 cc_unit_populate_key(const struct brw_context *brw,
 112                      struct brw_cc_unit_key *key)
 113 {
 114    key->cc0 = brw->curr.zstencil->cc0;
 115    key->cc1 = brw->curr.zstencil->cc1;
 116    key->cc2 = brw->curr.zstencil->cc2;
 117    key->cc3 = combine_cc3( brw->curr.zstencil->cc3, brw->curr.blend->cc3 );
 118    key->cc5 = brw->curr.blend->cc5;
 119    key->cc6 = brw->curr.blend->cc6;
 120    key->cc7 = brw->curr.zstencil->cc7;
 121 }
 122
 123 /**
 124  * Creates the state cache entry for the given CC unit key.
 125  */
 126 static struct brw_winsys_buffer *
 127 cc_unit_create_from_key(struct brw_context *brw, struct brw_cc_unit_key *key)
 128 {
 129    struct brw_cc_unit_state cc;
 130    struct brw_winsys_buffer *bo;
 131
 132    memset(&cc, 0, sizeof(cc));
 133
 134    cc.cc0 = key->cc0;
 135    cc.cc1 = key->cc1;
 136    cc.cc2 = key->cc2;
 137    cc.cc3 = key->cc3;
 138
 139    /* CACHE_NEW_CC_VP */
 140    cc.cc4.cc_viewport_state_offset = *(brw->cc.vp_bo->offset) >> 5; /* reloc */
 141
 142    cc.cc5 = key->cc5;
 143    cc.cc6 = key->cc6;
 144    cc.cc7 = key->cc7;
 145
 146    bo = brw_upload_cache(&brw->cache, BRW_CC_UNIT,
 147                          key, sizeof(*key),
 148                          &brw->cc.vp_bo, 1,
 149                          &cc, sizeof(cc),
 150                          NULL, NULL);
 151
 152    /* Emit CC viewport relocation */
 153    brw->sws->bo_emit_reloc(bo,
 154                            I915_GEM_DOMAIN_INSTRUCTION,
 155                            0,
 156                            0,
 157                            offsetof(struct brw_cc_unit_state, cc4),
 158                            brw->cc.vp_bo);
 159
 160    return bo;
 161 }
 162
 163 static int prepare_cc_unit( struct brw_context *brw )
 164 {
 165    struct brw_cc_unit_key key;
 166
 167    cc_unit_populate_key(brw, &key);
 168
 169    brw->sws->bo_unreference(brw->cc.state_bo);
 170    brw->cc.state_bo = brw_search_cache(&brw->cache, BRW_CC_UNIT,
 171                                        &key, sizeof(key),
 172                                        &brw->cc.vp_bo, 1,
 173                                        NULL);
 174
 175    if (brw->cc.state_bo == NULL)
 176       brw->cc.state_bo = cc_unit_create_from_key(brw, &key);
 177
 178    return 0;
 179 }
 180
 181 const struct brw_tracked_state brw_cc_unit = {
 182    .dirty = {
 183       .mesa = PIPE_NEW_DEPTH_STENCIL_ALPHA | PIPE_NEW_BLEND,
 184       .brw = 0,
 185       .cache = CACHE_NEW_CC_VP
 186    },
 187    .prepare = prepare_cc_unit,
 188 };
 189
 190
 191