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 static void prepare_cc_vp( struct brw_context *brw )
  38 {
  39    struct brw_cc_viewport ccv;
  40
  41    memset(&ccv, 0, sizeof(ccv));
  42
  43    /* _NEW_VIEWPORT */
  44    ccv.min_depth = ctx->Viewport.Near;
  45    ccv.max_depth = ctx->Viewport.Far;
  46
  47    brw->sws->bo_unreference(brw->cc.vp_bo);
  48    brw->cc.vp_bo = brw_cache_data( &brw->cache, BRW_CC_VP, &ccv, NULL, 0 );
  49 }
  50
  51 const struct brw_tracked_state brw_cc_vp = {
  52    .dirty = {
  53       .mesa = PIPE_NEW_VIEWPORT,
  54       .brw = BRW_NEW_CONTEXT,
  55       .cache = 0
  56    },
  57    .prepare = prepare_cc_vp
  58 };
  59
  60 struct brw_cc_unit_key {
  61    struct pipe_depth_stencil_alpha_state dsa;
  62    struct pipe_blend_state blend; /* no color mask */
  63 };
  64
  65 static void
  66 cc_unit_populate_key(struct brw_context *brw, struct brw_cc_unit_key *key)
  67 {
  68    memset(key, 0, sizeof(*key));
  69
  70    key->dsa = brw->dsa;
  71    key->blend = brw->blend;
  72
  73    /* Clear non-respected values:
  74     */
  75    key->blend.colormask = 0xf;
  76 }
  77
  78 /**
  79  * Creates the state cache entry for the given CC unit key.
  80  */
  81 static struct brw_winsys_buffer *
  82 cc_unit_create_from_key(struct brw_context *brw, struct brw_cc_unit_key *key)
  83 {
  84    struct brw_cc_unit_state cc;
  85    struct brw_winsys_buffer *bo;
  86
  87    memset(&cc, 0, sizeof(cc));
  88
  89    cc.cc0 = brw->dsa.cc0;
  90    cc.cc1 = brw->dsa.cc1;
  91    cc.cc2 = brw->dsa.cc2;
  92    cc.cc3 = brw->dsa.cc3 | brw->blend.cc3;
  93
  94    /* CACHE_NEW_CC_VP */
  95    cc.cc4.cc_viewport_state_offset = brw->cc.vp_bo->offset >> 5; /* reloc */
  96
  97    cc.cc5 = brw->blend.cc5 | brw->debug.cc5;
  98
  99
 100    bo = brw_upload_cache(&brw->cache, BRW_CC_UNIT,
 101                          key, sizeof(*key),
 102                          &brw->cc.vp_bo, 1,
 103                          &cc, sizeof(cc),
 104                          NULL, NULL);
 105
 106    /* Emit CC viewport relocation */
 107    dri_bo_emit_reloc(bo,
 108                      I915_GEM_DOMAIN_INSTRUCTION,
 109                      0,
 110                      0,
 111                      offsetof(struct brw_cc_unit_state, cc4),
 112                      brw->cc.vp_bo);
 113
 114    return bo;
 115 }
 116
 117 static void prepare_cc_unit( struct brw_context *brw )
 118 {
 119    struct brw_cc_unit_key key;
 120
 121    cc_unit_populate_key(brw, &key);
 122
 123    brw->sws->bo_unreference(brw->cc.state_bo);
 124    brw->cc.state_bo = brw_search_cache(&brw->cache, BRW_CC_UNIT,
 125                                        &key, sizeof(key),
 126                                        &brw->cc.vp_bo, 1,
 127                                        NULL);
 128
 129    if (brw->cc.state_bo == NULL)
 130       brw->cc.state_bo = cc_unit_create_from_key(brw, &key);
 131 }
 132
 133 const struct brw_tracked_state brw_cc_unit = {
 134    .dirty = {
 135       .mesa = PIPE_NEW_DEPTH_STENCIL_ALPHA | PIPE_NEW_BLEND,
 136       .brw = 0,
 137       .cache = CACHE_NEW_CC_VP
 138    },
 139    .prepare = prepare_cc_unit,
 140 };
 141
 142
 143