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    GLcontext *ctx = &brw->intel.ctx;
  43    struct brw_cc_viewport ccv;
  44
  45    memset(&ccv, 0, sizeof(ccv));
  46
  47    /* _NEW_TRANSOFORM */
  48    if (ctx->Transform.DepthClamp) {
  49       /* _NEW_VIEWPORT */
  50       ccv.min_depth = MIN2(ctx->Viewport.Near, ctx->Viewport.Far);
  51       ccv.max_depth = MAX2(ctx->Viewport.Near, ctx->Viewport.Far);
  52    } else {
  53       ccv.min_depth = 0.0;
  54       ccv.max_depth = 1.0;
  55    }
  56
  57    dri_bo_unreference(brw->cc.vp_bo);
  58    brw->cc.vp_bo = brw_cache_data(&brw->cache, BRW_CC_VP, &ccv, sizeof(ccv),
  59                                   NULL, 0);
  60 }
  61
  62 const struct brw_tracked_state brw_cc_vp = {
  63    .dirty = {
  64       .mesa = _NEW_VIEWPORT | _NEW_TRANSFORM,
  65       .brw = BRW_NEW_CONTEXT,
  66       .cache = 0
  67    },
  68    .prepare = prepare_cc_vp
  69 };
  70
  71 struct brw_cc_unit_key {
  72    GLboolean stencil, stencil_two_side, color_blend, alpha_enabled;
  73
  74    GLenum stencil_func[2], stencil_fail_op[2];
  75    GLenum stencil_pass_depth_fail_op[2], stencil_pass_depth_pass_op[2];
  76    GLubyte stencil_ref[2], stencil_write_mask[2], stencil_test_mask[2];
  77    GLenum logic_op;
  78
  79    GLenum blend_eq_rgb, blend_eq_a;
  80    GLenum blend_src_rgb, blend_src_a;
  81    GLenum blend_dst_rgb, blend_dst_a;
  82
  83    GLenum alpha_func;
  84    GLclampf alpha_ref;
  85
  86    GLboolean dither;
  87
  88    GLboolean depth_test, depth_write;
  89    GLenum depth_func;
  90 };
  91
  92 static void
  93 cc_unit_populate_key(struct brw_context *brw, struct brw_cc_unit_key *key)
  94 {
  95    GLcontext *ctx = &brw->intel.ctx;
  96    const unsigned back = ctx->Stencil._BackFace;
  97
  98    memset(key, 0, sizeof(*key));
  99
 100    key->stencil = ctx->Stencil._Enabled;
 101    key->stencil_two_side = ctx->Stencil._TestTwoSide;
 102
 103    if (key->stencil) {
 104       key->stencil_func[0] = ctx->Stencil.Function[0];
 105       key->stencil_fail_op[0] = ctx->Stencil.FailFunc[0];
 106       key->stencil_pass_depth_fail_op[0] = ctx->Stencil.ZFailFunc[0];
 107       key->stencil_pass_depth_pass_op[0] = ctx->Stencil.ZPassFunc[0];
 108       key->stencil_ref[0] = ctx->Stencil.Ref[0];
 109       key->stencil_write_mask[0] = ctx->Stencil.WriteMask[0];
 110       key->stencil_test_mask[0] = ctx->Stencil.ValueMask[0];
 111    }
 112    if (key->stencil_two_side) {
 113       key->stencil_func[1] = ctx->Stencil.Function[back];
 114       key->stencil_fail_op[1] = ctx->Stencil.FailFunc[back];
 115       key->stencil_pass_depth_fail_op[1] = ctx->Stencil.ZFailFunc[back];
 116       key->stencil_pass_depth_pass_op[1] = ctx->Stencil.ZPassFunc[back];
 117       key->stencil_ref[1] = ctx->Stencil.Ref[back];
 118       key->stencil_write_mask[1] = ctx->Stencil.WriteMask[back];
 119       key->stencil_test_mask[1] = ctx->Stencil.ValueMask[back];
 120    }
 121
 122    if (ctx->Color._LogicOpEnabled)
 123       key->logic_op = ctx->Color.LogicOp;
 124    else
 125       key->logic_op = GL_COPY;
 126
 127    key->color_blend = ctx->Color.BlendEnabled;
 128    if (key->color_blend) {
 129       key->blend_eq_rgb = ctx->Color.BlendEquationRGB;
 130       key->blend_eq_a = ctx->Color.BlendEquationA;
 131       key->blend_src_rgb = ctx->Color.BlendSrcRGB;
 132       key->blend_dst_rgb = ctx->Color.BlendDstRGB;
 133       key->blend_src_a = ctx->Color.BlendSrcA;
 134       key->blend_dst_a = ctx->Color.BlendDstA;
 135    }
 136
 137    key->alpha_enabled = ctx->Color.AlphaEnabled;
 138    if (key->alpha_enabled) {
 139       key->alpha_func = ctx->Color.AlphaFunc;
 140       key->alpha_ref = ctx->Color.AlphaRef;
 141    }
 142
 143    key->dither = ctx->Color.DitherFlag;
 144
 145    key->depth_test = ctx->Depth.Test;
 146    if (key->depth_test) {
 147       key->depth_func = ctx->Depth.Func;
 148       key->depth_write = ctx->Depth.Mask;
 149    }
 150 }
 151
 152 /**
 153  * Creates the state cache entry for the given CC unit key.
 154  */
 155 static dri_bo *
 156 cc_unit_create_from_key(struct brw_context *brw, struct brw_cc_unit_key *key)
 157 {
 158    struct brw_cc_unit_state cc;
 159    dri_bo *bo;
 160
 161    memset(&cc, 0, sizeof(cc));
 162
 163    /* _NEW_STENCIL */
 164    if (key->stencil) {
 165       cc.cc0.stencil_enable = 1;
 166       cc.cc0.stencil_func =
 167          intel_translate_compare_func(key->stencil_func[0]);
 168       cc.cc0.stencil_fail_op =
 169          intel_translate_stencil_op(key->stencil_fail_op[0]);
 170       cc.cc0.stencil_pass_depth_fail_op =
 171          intel_translate_stencil_op(key->stencil_pass_depth_fail_op[0]);
 172       cc.cc0.stencil_pass_depth_pass_op =
 173          intel_translate_stencil_op(key->stencil_pass_depth_pass_op[0]);
 174       cc.cc1.stencil_ref = key->stencil_ref[0];
 175       cc.cc1.stencil_write_mask = key->stencil_write_mask[0];
 176       cc.cc1.stencil_test_mask = key->stencil_test_mask[0];
 177
 178       if (key->stencil_two_side) {
 179          cc.cc0.bf_stencil_enable = 1;
 180          cc.cc0.bf_stencil_func =
 181             intel_translate_compare_func(key->stencil_func[1]);
 182          cc.cc0.bf_stencil_fail_op =
 183             intel_translate_stencil_op(key->stencil_fail_op[1]);
 184          cc.cc0.bf_stencil_pass_depth_fail_op =
 185             intel_translate_stencil_op(key->stencil_pass_depth_fail_op[1]);
 186          cc.cc0.bf_stencil_pass_depth_pass_op =
 187             intel_translate_stencil_op(key->stencil_pass_depth_pass_op[1]);
 188          cc.cc1.bf_stencil_ref = key->stencil_ref[1];
 189          cc.cc2.bf_stencil_write_mask = key->stencil_write_mask[1];
 190          cc.cc2.bf_stencil_test_mask = key->stencil_test_mask[1];
 191       }
 192
 193       /* Not really sure about this:
 194        */
 195       if (key->stencil_write_mask[0] ||
 196           (key->stencil_two_side && key->stencil_write_mask[1]))
 197          cc.cc0.stencil_write_enable = 1;
 198    }
 199
 200    /* _NEW_COLOR */
 201    if (key->logic_op != GL_COPY) {
 202       cc.cc2.logicop_enable = 1;
 203       cc.cc5.logicop_func = intel_translate_logic_op(key->logic_op);
 204    } else if (key->color_blend) {
 205       GLenum eqRGB = key->blend_eq_rgb;
 206       GLenum eqA = key->blend_eq_a;
 207       GLenum srcRGB = key->blend_src_rgb;
 208       GLenum dstRGB = key->blend_dst_rgb;
 209       GLenum srcA = key->blend_src_a;
 210       GLenum dstA = key->blend_dst_a;
 211
 212       if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
 213          srcRGB = dstRGB = GL_ONE;
 214       }
 215
 216       if (eqA == GL_MIN || eqA == GL_MAX) {
 217          srcA = dstA = GL_ONE;
 218       }
 219
 220       cc.cc6.dest_blend_factor = brw_translate_blend_factor(dstRGB);
 221       cc.cc6.src_blend_factor = brw_translate_blend_factor(srcRGB);
 222       cc.cc6.blend_function = brw_translate_blend_equation(eqRGB);
 223
 224       cc.cc5.ia_dest_blend_factor = brw_translate_blend_factor(dstA);
 225       cc.cc5.ia_src_blend_factor = brw_translate_blend_factor(srcA);
 226       cc.cc5.ia_blend_function = brw_translate_blend_equation(eqA);
 227
 228       cc.cc3.blend_enable = 1;
 229       cc.cc3.ia_blend_enable = (srcA != srcRGB ||
 230                                 dstA != dstRGB ||
 231                                 eqA != eqRGB);
 232    }
 233
 234    if (key->alpha_enabled) {
 235       cc.cc3.alpha_test = 1;
 236       cc.cc3.alpha_test_func = intel_translate_compare_func(key->alpha_func);
 237       cc.cc3.alpha_test_format = BRW_ALPHATEST_FORMAT_UNORM8;
 238
 239       UNCLAMPED_FLOAT_TO_UBYTE(cc.cc7.alpha_ref.ub[0], key->alpha_ref);
 240    }
 241
 242    if (key->dither) {
 243       cc.cc5.dither_enable = 1;
 244       cc.cc6.y_dither_offset = 0;
 245       cc.cc6.x_dither_offset = 0;
 246    }
 247
 248    /* _NEW_DEPTH */
 249    if (key->depth_test) {
 250       cc.cc2.depth_test = 1;
 251       cc.cc2.depth_test_function = intel_translate_compare_func(key->depth_func);
 252       cc.cc2.depth_write_enable = key->depth_write;
 253    }
 254
 255    /* CACHE_NEW_CC_VP */
 256    cc.cc4.cc_viewport_state_offset = brw->cc.vp_bo->offset >> 5; /* reloc */
 257
 258    if (INTEL_DEBUG & DEBUG_STATS)
 259       cc.cc5.statistics_enable = 1;
 260
 261    bo = brw_upload_cache(&brw->cache, BRW_CC_UNIT,
 262                          key, sizeof(*key),
 263                          &brw->cc.vp_bo, 1,
 264                          &cc, sizeof(cc),
 265                          NULL, NULL);
 266
 267    /* Emit CC viewport relocation */
 268    dri_bo_emit_reloc(bo,
 269                      I915_GEM_DOMAIN_INSTRUCTION,
 270                      0,
 271                      0,
 272                      offsetof(struct brw_cc_unit_state, cc4),
 273                      brw->cc.vp_bo);
 274
 275    return bo;
 276 }
 277
 278 static void prepare_cc_unit( struct brw_context *brw )
 279 {
 280    struct brw_cc_unit_key key;
 281
 282    cc_unit_populate_key(brw, &key);
 283
 284    dri_bo_unreference(brw->cc.state_bo);
 285    brw->cc.state_bo = brw_search_cache(&brw->cache, BRW_CC_UNIT,
 286                                        &key, sizeof(key),
 287                                        &brw->cc.vp_bo, 1,
 288                                        NULL);
 289
 290    if (brw->cc.state_bo == NULL)
 291       brw->cc.state_bo = cc_unit_create_from_key(brw, &key);
 292 }
 293
 294 const struct brw_tracked_state brw_cc_unit = {
 295    .dirty = {
 296       .mesa = _NEW_STENCIL | _NEW_COLOR | _NEW_DEPTH,
 297       .brw = 0,
 298       .cache = CACHE_NEW_CC_VP
 299    },
 300    .prepare = prepare_cc_unit,
 301 };
 302
 303
 304