src/mesa/drivers/dri/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 #include "brw_util.h"
  37 #include "main/macros.h"
  38 #include "main/enums.h"
  39
  40 static void prepare_cc_vp( struct brw_context *brw )
  41 {
  42    struct brw_cc_viewport ccv;
  43
  44    memset(&ccv, 0, sizeof(ccv));
  45
  46    ccv.min_depth = 0.0;
  47    ccv.max_depth = 1.0;
  48
  49    dri_bo_unreference(brw->cc.vp_bo);
  50    brw->cc.vp_bo = brw_cache_data( &brw->cache, BRW_CC_VP, &ccv, NULL, 0 );
  51 }
  52
  53 const struct brw_tracked_state brw_cc_vp = {
  54    .dirty = {
  55       .mesa = 0,
  56       .brw = BRW_NEW_CONTEXT,
  57       .cache = 0
  58    },
  59    .prepare = prepare_cc_vp
  60 };
  61
  62 struct brw_cc_unit_key {
  63    GLboolean stencil, stencil_two_side, color_blend, alpha_enabled;
  64
  65    GLenum stencil_func[2], stencil_fail_op[2];
  66    GLenum stencil_pass_depth_fail_op[2], stencil_pass_depth_pass_op[2];
  67    GLubyte stencil_ref[2], stencil_write_mask[2], stencil_test_mask[2];
  68    GLenum logic_op;
  69
  70    GLenum blend_eq_rgb, blend_eq_a;
  71    GLenum blend_src_rgb, blend_src_a;
  72    GLenum blend_dst_rgb, blend_dst_a;
  73
  74    GLenum alpha_func;
  75    GLclampf alpha_ref;
  76
  77    GLboolean dither;
  78
  79    GLboolean depth_test, depth_write;
  80    GLenum depth_func;
  81 };
  82
  83 static void
  84 cc_unit_populate_key(struct brw_context *brw, struct brw_cc_unit_key *key)
  85 {
  86    GLcontext *ctx = &brw->intel.ctx;
  87    const unsigned back = ctx->Stencil._BackFace;
  88
  89    memset(key, 0, sizeof(*key));
  90
  91    key->stencil = ctx->Stencil._Enabled;
  92    key->stencil_two_side = ctx->Stencil._TestTwoSide;
  93
  94    if (key->stencil) {
  95       key->stencil_func[0] = ctx->Stencil.Function[0];
  96       key->stencil_fail_op[0] = ctx->Stencil.FailFunc[0];
  97       key->stencil_pass_depth_fail_op[0] = ctx->Stencil.ZFailFunc[0];
  98       key->stencil_pass_depth_pass_op[0] = ctx->Stencil.ZPassFunc[0];
  99       key->stencil_ref[0] = ctx->Stencil.Ref[0];
 100       key->stencil_write_mask[0] = ctx->Stencil.WriteMask[0];
 101       key->stencil_test_mask[0] = ctx->Stencil.ValueMask[0];
 102    }
 103    if (key->stencil_two_side) {
 104       key->stencil_func[1] = ctx->Stencil.Function[back];
 105       key->stencil_fail_op[1] = ctx->Stencil.FailFunc[back];
 106       key->stencil_pass_depth_fail_op[1] = ctx->Stencil.ZFailFunc[back];
 107       key->stencil_pass_depth_pass_op[1] = ctx->Stencil.ZPassFunc[back];
 108       key->stencil_ref[1] = ctx->Stencil.Ref[back];
 109       key->stencil_write_mask[1] = ctx->Stencil.WriteMask[back];
 110       key->stencil_test_mask[1] = ctx->Stencil.ValueMask[back];
 111    }
 112
 113    if (ctx->Color._LogicOpEnabled)
 114       key->logic_op = ctx->Color.LogicOp;
 115    else
 116       key->logic_op = GL_COPY;
 117
 118    key->color_blend = ctx->Color.BlendEnabled;
 119    if (key->color_blend) {
 120       key->blend_eq_rgb = ctx->Color.BlendEquationRGB;
 121       key->blend_eq_a = ctx->Color.BlendEquationA;
 122       key->blend_src_rgb = ctx->Color.BlendSrcRGB;
 123       key->blend_dst_rgb = ctx->Color.BlendDstRGB;
 124       key->blend_src_a = ctx->Color.BlendSrcA;
 125       key->blend_dst_a = ctx->Color.BlendDstA;
 126    }
 127
 128    key->alpha_enabled = ctx->Color.AlphaEnabled;
 129    if (key->alpha_enabled) {
 130       key->alpha_func = ctx->Color.AlphaFunc;
 131       key->alpha_ref = ctx->Color.AlphaRef;
 132    }
 133
 134    key->dither = ctx->Color.DitherFlag;
 135
 136    key->depth_test = ctx->Depth.Test;
 137    if (key->depth_test) {
 138       key->depth_func = ctx->Depth.Func;
 139       key->depth_write = ctx->Depth.Mask;
 140    }
 141 }
 142
 143 /**
 144  * Creates the state cache entry for the given CC unit key.
 145  */
 146 static dri_bo *
 147 cc_unit_create_from_key(struct brw_context *brw, struct brw_cc_unit_key *key)
 148 {
 149    struct brw_cc_unit_state cc;
 150    dri_bo *bo;
 151
 152    memset(&cc, 0, sizeof(cc));
 153
 154    /* _NEW_STENCIL */
 155    if (key->stencil) {
 156       cc.cc0.stencil_enable = 1;
 157       cc.cc0.stencil_func =
 158          intel_translate_compare_func(key->stencil_func[0]);
 159       cc.cc0.stencil_fail_op =
 160          intel_translate_stencil_op(key->stencil_fail_op[0]);
 161       cc.cc0.stencil_pass_depth_fail_op =
 162          intel_translate_stencil_op(key->stencil_pass_depth_fail_op[0]);
 163       cc.cc0.stencil_pass_depth_pass_op =
 164          intel_translate_stencil_op(key->stencil_pass_depth_pass_op[0]);
 165       cc.cc1.stencil_ref = key->stencil_ref[0];
 166       cc.cc1.stencil_write_mask = key->stencil_write_mask[0];
 167       cc.cc1.stencil_test_mask = key->stencil_test_mask[0];
 168
 169       if (key->stencil_two_side) {
 170          cc.cc0.bf_stencil_enable = 1;
 171          cc.cc0.bf_stencil_func =
 172             intel_translate_compare_func(key->stencil_func[1]);
 173          cc.cc0.bf_stencil_fail_op =
 174             intel_translate_stencil_op(key->stencil_fail_op[1]);
 175          cc.cc0.bf_stencil_pass_depth_fail_op =
 176             intel_translate_stencil_op(key->stencil_pass_depth_fail_op[1]);
 177          cc.cc0.bf_stencil_pass_depth_pass_op =
 178             intel_translate_stencil_op(key->stencil_pass_depth_pass_op[1]);
 179          cc.cc1.bf_stencil_ref = key->stencil_ref[1];
 180          cc.cc2.bf_stencil_write_mask = key->stencil_write_mask[1];
 181          cc.cc2.bf_stencil_test_mask = key->stencil_test_mask[1];
 182       }
 183
 184       /* Not really sure about this:
 185        */
 186       if (key->stencil_write_mask[0] ||
 187           (key->stencil_two_side && key->stencil_write_mask[1]))
 188          cc.cc0.stencil_write_enable = 1;
 189    }
 190
 191    /* _NEW_COLOR */
 192    if (key->logic_op != GL_COPY) {
 193       cc.cc2.logicop_enable = 1;
 194       cc.cc5.logicop_func = intel_translate_logic_op(key->logic_op);
 195    } else if (key->color_blend) {
 196       GLenum eqRGB = key->blend_eq_rgb;
 197       GLenum eqA = key->blend_eq_a;
 198       GLenum srcRGB = key->blend_src_rgb;
 199       GLenum dstRGB = key->blend_dst_rgb;
 200       GLenum srcA = key->blend_src_a;
 201       GLenum dstA = key->blend_dst_a;
 202
 203       if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
 204          srcRGB = dstRGB = GL_ONE;
 205       }
 206
 207       if (eqA == GL_MIN || eqA == GL_MAX) {
 208          srcA = dstA = GL_ONE;
 209       }
 210
 211       cc.cc6.dest_blend_factor = brw_translate_blend_factor(dstRGB);
 212       cc.cc6.src_blend_factor = brw_translate_blend_factor(srcRGB);
 213       cc.cc6.blend_function = brw_translate_blend_equation(eqRGB);
 214
 215       cc.cc5.ia_dest_blend_factor = brw_translate_blend_factor(dstA);
 216       cc.cc5.ia_src_blend_factor = brw_translate_blend_factor(srcA);
 217       cc.cc5.ia_blend_function = brw_translate_blend_equation(eqA);
 218
 219       cc.cc3.blend_enable = 1;
 220       cc.cc3.ia_blend_enable = (srcA != srcRGB ||
 221                                 dstA != dstRGB ||
 222                                 eqA != eqRGB);
 223    }
 224
 225    if (key->alpha_enabled) {
 226       cc.cc3.alpha_test = 1;
 227       cc.cc3.alpha_test_func = intel_translate_compare_func(key->alpha_func);
 228       cc.cc3.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8;
 229
 230       UNCLAMPED_FLOAT_TO_UBYTE(cc.cc7.alpha_ref.ub[0], key->alpha_ref);
 231    }
 232
 233    if (key->dither) {
 234       cc.cc5.dither_enable = 1;
 235       cc.cc6.y_dither_offset = 0;
 236       cc.cc6.x_dither_offset = 0;
 237    }
 238
 239    /* _NEW_DEPTH */
 240    if (key->depth_test) {
 241       cc.cc2.depth_test = 1;
 242       cc.cc2.depth_test_function = intel_translate_compare_func(key->depth_func);
 243       cc.cc2.depth_write_enable = key->depth_write;
 244    }
 245
 246    /* CACHE_NEW_CC_VP */
 247    cc.cc4.cc_viewport_state_offset = brw->cc.vp_bo->offset >> 5; /* reloc */
 248
 249    if (INTEL_DEBUG & DEBUG_STATS)
 250       cc.cc5.statistics_enable = 1;
 251
 252    bo = brw_upload_cache(&brw->cache, BRW_CC_UNIT,
 253                          key, sizeof(*key),
 254                          &brw->cc.vp_bo, 1,
 255                          &cc, sizeof(cc),
 256                          NULL, NULL);
 257
 258    /* Emit CC viewport relocation */
 259    dri_bo_emit_reloc(bo,
 260                      I915_GEM_DOMAIN_INSTRUCTION,
 261                      0,
 262                      0,
 263                      offsetof(struct brw_cc_unit_state, cc4),
 264                      brw->cc.vp_bo);
 265
 266    return bo;
 267 }
 268
 269 static void prepare_cc_unit( struct brw_context *brw )
 270 {
 271    struct brw_cc_unit_key key;
 272
 273    cc_unit_populate_key(brw, &key);
 274
 275    dri_bo_unreference(brw->cc.state_bo);
 276    brw->cc.state_bo = brw_search_cache(&brw->cache, BRW_CC_UNIT,
 277                                        &key, sizeof(key),
 278                                        &brw->cc.vp_bo, 1,
 279                                        NULL);
 280
 281    if (brw->cc.state_bo == NULL)
 282       brw->cc.state_bo = cc_unit_create_from_key(brw, &key);
 283 }
 284
 285 const struct brw_tracked_state brw_cc_unit = {
 286    .dirty = {
 287       .mesa = _NEW_STENCIL | _NEW_COLOR | _NEW_DEPTH,
 288       .brw = 0,
 289       .cache = CACHE_NEW_CC_VP
 290    },
 291    .prepare = prepare_cc_unit,
 292 };
 293
 294
 295