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 void 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
  77 const struct brw_tracked_state brw_cc_vp = {
  78    .dirty = {
  79       .mesa = PIPE_NEW_VIEWPORT,
  80       .brw = BRW_NEW_CONTEXT,
  81       .cache = 0
  82    },
  83    .prepare = prepare_cc_vp
  84 };
  85
  86 struct brw_cc_unit_key {
  87    struct brw_cc0 cc0;
  88    struct brw_cc1 cc1;
  89    struct brw_cc2 cc2;
  90    struct brw_cc3 cc3;
  91    struct brw_cc5 cc5;
  92    struct brw_cc6 cc6;
  93    struct brw_cc7 cc7;
  94 };
  95
  96 /* A long-winded way to OR two unsigned integers together:
  97  */
  98 static INLINE struct brw_cc3
  99 combine_cc3( struct brw_cc3 a, struct brw_cc3 b )
 100 {
 101    union { struct brw_cc3 cc3; unsigned i; } ca, cb;
 102    ca.cc3 = a;
 103    cb.cc3 = b;
 104    ca.i |= cb.i;
 105    return ca.cc3;
 106 }
 107
 108 static void
 109 cc_unit_populate_key(const struct brw_context *brw,
 110                      struct brw_cc_unit_key *key)
 111 {
 112    key->cc0 = brw->curr.zstencil->cc0;
 113    key->cc1 = brw->curr.zstencil->cc1;
 114    key->cc2 = brw->curr.zstencil->cc2;
 115    key->cc3 = combine_cc3( brw->curr.zstencil->cc3, brw->curr.blend->cc3 );
 116    key->cc5 = brw->curr.blend->cc5;
 117    key->cc6 = brw->curr.blend->cc6;
 118    key->cc7 = brw->curr.blend->cc7;
 119 }
 120
 121 /**
 122  * Creates the state cache entry for the given CC unit key.
 123  */
 124 static struct brw_winsys_buffer *
 125 cc_unit_create_from_key(struct brw_context *brw, struct brw_cc_unit_key *key)
 126 {
 127    struct brw_cc_unit_state cc;
 128    struct brw_winsys_buffer *bo;
 129
 130    memset(&cc, 0, sizeof(cc));
 131
 132    cc.cc0 = key->cc0;
 133    cc.cc1 = key->cc1;
 134    cc.cc2 = key->cc2;
 135    cc.cc3 = key->cc3;
 136
 137    /* CACHE_NEW_CC_VP */
 138    cc.cc4.cc_viewport_state_offset = brw->cc.vp_bo->offset >> 5; /* reloc */
 139
 140    cc.cc5 = key->cc5;
 141    cc.cc6 = key->cc6;
 142    cc.cc7 = key->cc7;
 143
 144    bo = brw_upload_cache(&brw->cache, BRW_CC_UNIT,
 145                          key, sizeof(*key),
 146                          &brw->cc.vp_bo, 1,
 147                          &cc, sizeof(cc),
 148                          NULL, NULL);
 149
 150    /* Emit CC viewport relocation */
 151    brw->sws->bo_emit_reloc(bo,
 152                            I915_GEM_DOMAIN_INSTRUCTION,
 153                            0,
 154                            0,
 155                            offsetof(struct brw_cc_unit_state, cc4),
 156                            brw->cc.vp_bo);
 157
 158    return bo;
 159 }
 160
 161 static void prepare_cc_unit( struct brw_context *brw )
 162 {
 163    struct brw_cc_unit_key key;
 164
 165    cc_unit_populate_key(brw, &key);
 166
 167    brw->sws->bo_unreference(brw->cc.state_bo);
 168    brw->cc.state_bo = brw_search_cache(&brw->cache, BRW_CC_UNIT,
 169                                        &key, sizeof(key),
 170                                        &brw->cc.vp_bo, 1,
 171                                        NULL);
 172
 173    if (brw->cc.state_bo == NULL)
 174       brw->cc.state_bo = cc_unit_create_from_key(brw, &key);
 175 }
 176
 177 const struct brw_tracked_state brw_cc_unit = {
 178    .dirty = {
 179       .mesa = PIPE_NEW_DEPTH_STENCIL_ALPHA | PIPE_NEW_BLEND,
 180       .brw = 0,
 181       .cache = CACHE_NEW_CC_VP
 182    },
 183    .prepare = prepare_cc_unit,
 184 };
 185
 186
 187