src/mesa/drivers/dri/i965/brw_wm.c

   1 /*
   2  Copyright (C) Intel Corp.  2006.  All Rights Reserved.
   3  Intel funded Tungsten Graphics 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 <keithw@vmware.com>
  30   */
  31
  32 #include "brw_context.h"
  33 #include "brw_wm.h"
  34 #include "brw_state.h"
  35 #include "main/enums.h"
  36 #include "main/formats.h"
  37 #include "main/fbobject.h"
  38 #include "main/samplerobj.h"
  39 #include "program/prog_parameter.h"
  40 #include "program/program.h"
  41 #include "intel_mipmap_tree.h"
  42
  43 #include "glsl/ralloc.h"
  44
  45 /**
  46  * Return a bitfield where bit n is set if barycentric interpolation mode n
  47  * (see enum brw_wm_barycentric_interp_mode) is needed by the fragment shader.
  48  */
  49 static unsigned
  50 brw_compute_barycentric_interp_modes(struct brw_context *brw,
  51                                      bool shade_model_flat,
  52                                      bool persample_shading,
  53                                      const struct gl_fragment_program *fprog)
  54 {
  55    unsigned barycentric_interp_modes = 0;
  56    int attr;
  57
  58    /* Loop through all fragment shader inputs to figure out what interpolation
  59     * modes are in use, and set the appropriate bits in
  60     * barycentric_interp_modes.
  61     */
  62    for (attr = 0; attr < VARYING_SLOT_MAX; ++attr) {
  63       enum glsl_interp_qualifier interp_qualifier =
  64          fprog->InterpQualifier[attr];
  65       bool is_centroid = fprog->IsCentroid & BITFIELD64_BIT(attr);
  66       bool is_sample = (fprog->IsSample & BITFIELD64_BIT(attr)) ||
  67          persample_shading;
  68       bool is_gl_Color = attr == VARYING_SLOT_COL0 || attr == VARYING_SLOT_COL1;
  69
  70       /* Ignore unused inputs. */
  71       if (!(fprog->Base.InputsRead & BITFIELD64_BIT(attr)))
  72          continue;
  73
  74       /* Ignore WPOS and FACE, because they don't require interpolation. */
  75       if (attr == VARYING_SLOT_POS || attr == VARYING_SLOT_FACE)
  76          continue;
  77
  78       /* Determine the set (or sets) of barycentric coordinates needed to
  79        * interpolate this variable.  Note that when
  80        * brw->needs_unlit_centroid_workaround is set, centroid interpolation
  81        * uses PIXEL interpolation for unlit pixels and CENTROID interpolation
  82        * for lit pixels, so we need both sets of barycentric coordinates.
  83        */
  84       if (interp_qualifier == INTERP_QUALIFIER_NOPERSPECTIVE) {
  85          if (is_centroid) {
  86             barycentric_interp_modes |=
  87                1 << BRW_WM_NONPERSPECTIVE_CENTROID_BARYCENTRIC;
  88          } else if (is_sample) {
  89             barycentric_interp_modes |=
  90                1 << BRW_WM_NONPERSPECTIVE_SAMPLE_BARYCENTRIC;
  91          }
  92          if ((!is_centroid && !is_sample) ||
  93              brw->needs_unlit_centroid_workaround) {
  94             barycentric_interp_modes |=
  95                1 << BRW_WM_NONPERSPECTIVE_PIXEL_BARYCENTRIC;
  96          }
  97       } else if (interp_qualifier == INTERP_QUALIFIER_SMOOTH ||
  98                  (!(shade_model_flat && is_gl_Color) &&
  99                   interp_qualifier == INTERP_QUALIFIER_NONE)) {
 100          if (is_centroid) {
 101             barycentric_interp_modes |=
 102                1 << BRW_WM_PERSPECTIVE_CENTROID_BARYCENTRIC;
 103          } else if (is_sample) {
 104             barycentric_interp_modes |=
 105                1 << BRW_WM_PERSPECTIVE_SAMPLE_BARYCENTRIC;
 106          }
 107          if ((!is_centroid && !is_sample) ||
 108              brw->needs_unlit_centroid_workaround) {
 109             barycentric_interp_modes |=
 110                1 << BRW_WM_PERSPECTIVE_PIXEL_BARYCENTRIC;
 111          }
 112       }
 113    }
 114
 115    return barycentric_interp_modes;
 116 }
 117
 118 bool
 119 brw_wm_prog_data_compare(const void *in_a, const void *in_b)
 120 {
 121    const struct brw_wm_prog_data *a = in_a;
 122    const struct brw_wm_prog_data *b = in_b;
 123
 124    /* Compare all the struct (including the base) up to the pointers. */
 125    if (memcmp(a, b, offsetof(struct brw_wm_prog_data, param)))
 126       return false;
 127
 128    if (memcmp(a->param, b->param, a->nr_params * sizeof(void *)))
 129       return false;
 130
 131    if (memcmp(a->pull_param, b->pull_param, a->nr_pull_params * sizeof(void *)))
 132       return false;
 133
 134    return true;
 135 }
 136
 137 void
 138 brw_wm_prog_data_free(const void *in_prog_data)
 139 {
 140    const struct brw_wm_prog_data *prog_data = in_prog_data;
 141
 142    ralloc_free((void *)prog_data->param);
 143    ralloc_free((void *)prog_data->pull_param);
 144 }
 145
 146 /**
 147  * All Mesa program -> GPU code generation goes through this function.
 148  * Depending on the instructions used (i.e. flow control instructions)
 149  * we'll use one of two code generators.
 150  */
 151 bool do_wm_prog(struct brw_context *brw,
 152                 struct gl_shader_program *prog,
 153                 struct brw_fragment_program *fp,
 154                 struct brw_wm_prog_key *key)
 155 {
 156    struct brw_wm_compile *c;
 157    const GLuint *program;
 158    struct gl_shader *fs = NULL;
 159    GLuint program_size;
 160
 161    if (prog)
 162       fs = prog->_LinkedShaders[MESA_SHADER_FRAGMENT];
 163
 164    c = rzalloc(NULL, struct brw_wm_compile);
 165
 166    /* Allocate the references to the uniforms that will end up in the
 167     * prog_data associated with the compiled program, and which will be freed
 168     * by the state cache.
 169     */
 170    int param_count;
 171    if (fs) {
 172       param_count = fs->num_uniform_components;
 173    } else {
 174       param_count = fp->program.Base.Parameters->NumParameters * 4;
 175    }
 176    /* The backend also sometimes adds params for texture size. */
 177    param_count += 2 * BRW_MAX_TEX_UNIT;
 178    c->prog_data.param = rzalloc_array(NULL, const float *, param_count);
 179    c->prog_data.pull_param = rzalloc_array(NULL, const float *, param_count);
 180
 181    memcpy(&c->key, key, sizeof(*key));
 182
 183    c->prog_data.barycentric_interp_modes =
 184       brw_compute_barycentric_interp_modes(brw, c->key.flat_shade,
 185                                            c->key.persample_shading,
 186                                            &fp->program);
 187
 188    program = brw_wm_fs_emit(brw, c, &fp->program, prog, &program_size);
 189    if (program == NULL)
 190       return false;
 191
 192    /* Scratch space is used for register spilling */
 193    if (c->last_scratch) {
 194       perf_debug("Fragment shader triggered register spilling.  "
 195                  "Try reducing the number of live scalar values to "
 196                  "improve performance.\n");
 197
 198       c->prog_data.total_scratch = brw_get_scratch_size(c->last_scratch);
 199
 200       brw_get_scratch_bo(brw, &brw->wm.base.scratch_bo,
 201                          c->prog_data.total_scratch * brw->max_wm_threads);
 202    }
 203
 204    if (unlikely(INTEL_DEBUG & DEBUG_WM))
 205       fprintf(stderr, "\n");
 206
 207    brw_upload_cache(&brw->cache, BRW_WM_PROG,
 208                     &c->key, sizeof(c->key),
 209                     program, program_size,
 210                     &c->prog_data, sizeof(c->prog_data),
 211                     &brw->wm.base.prog_offset, &brw->wm.prog_data);
 212
 213    ralloc_free(c);
 214
 215    return true;
 216 }
 217
 218 static bool
 219 key_debug(struct brw_context *brw, const char *name, int a, int b)
 220 {
 221    if (a != b) {
 222       perf_debug("  %s %d->%d\n", name, a, b);
 223       return true;
 224    } else {
 225       return false;
 226    }
 227 }
 228
 229 bool
 230 brw_debug_recompile_sampler_key(struct brw_context *brw,
 231                                 const struct brw_sampler_prog_key_data *old_key,
 232                                 const struct brw_sampler_prog_key_data *key)
 233 {
 234    bool found = false;
 235
 236    for (unsigned int i = 0; i < MAX_SAMPLERS; i++) {
 237       found |= key_debug(brw, "EXT_texture_swizzle or DEPTH_TEXTURE_MODE",
 238                          old_key->swizzles[i], key->swizzles[i]);
 239    }
 240    found |= key_debug(brw, "GL_CLAMP enabled on any texture unit's 1st coordinate",
 241                       old_key->gl_clamp_mask[0], key->gl_clamp_mask[0]);
 242    found |= key_debug(brw, "GL_CLAMP enabled on any texture unit's 2nd coordinate",
 243                       old_key->gl_clamp_mask[1], key->gl_clamp_mask[1]);
 244    found |= key_debug(brw, "GL_CLAMP enabled on any texture unit's 3rd coordinate",
 245                       old_key->gl_clamp_mask[2], key->gl_clamp_mask[2]);
 246    found |= key_debug(brw, "GL_MESA_ycbcr texturing\n",
 247                       old_key->yuvtex_mask, key->yuvtex_mask);
 248    found |= key_debug(brw, "GL_MESA_ycbcr UV swapping\n",
 249                       old_key->yuvtex_swap_mask, key->yuvtex_swap_mask);
 250    found |= key_debug(brw, "gather channel quirk on any texture unit",
 251                       old_key->gather_channel_quirk_mask, key->gather_channel_quirk_mask);
 252
 253    return found;
 254 }
 255
 256 void
 257 brw_wm_debug_recompile(struct brw_context *brw,
 258                        struct gl_shader_program *prog,
 259                        const struct brw_wm_prog_key *key)
 260 {
 261    struct brw_cache_item *c = NULL;
 262    const struct brw_wm_prog_key *old_key = NULL;
 263    bool found = false;
 264
 265    perf_debug("Recompiling fragment shader for program %d\n", prog->Name);
 266
 267    for (unsigned int i = 0; i < brw->cache.size; i++) {
 268       for (c = brw->cache.items[i]; c; c = c->next) {
 269          if (c->cache_id == BRW_WM_PROG) {
 270             old_key = c->key;
 271
 272             if (old_key->program_string_id == key->program_string_id)
 273                break;
 274          }
 275       }
 276       if (c)
 277          break;
 278    }
 279
 280    if (!c) {
 281       perf_debug("  Didn't find previous compile in the shader cache for debug\n");
 282       return;
 283    }
 284
 285    found |= key_debug(brw, "alphatest, computed depth, depth test, or "
 286                       "depth write",
 287                       old_key->iz_lookup, key->iz_lookup);
 288    found |= key_debug(brw, "depth statistics",
 289                       old_key->stats_wm, key->stats_wm);
 290    found |= key_debug(brw, "flat shading",
 291                       old_key->flat_shade, key->flat_shade);
 292    found |= key_debug(brw, "number of color buffers",
 293                       old_key->nr_color_regions, key->nr_color_regions);
 294    found |= key_debug(brw, "MRT alpha test or alpha-to-coverage",
 295                       old_key->replicate_alpha, key->replicate_alpha);
 296    found |= key_debug(brw, "rendering to FBO",
 297                       old_key->render_to_fbo, key->render_to_fbo);
 298    found |= key_debug(brw, "fragment color clamping",
 299                       old_key->clamp_fragment_color, key->clamp_fragment_color);
 300    found |= key_debug(brw, "line smoothing",
 301                       old_key->line_aa, key->line_aa);
 302    found |= key_debug(brw, "renderbuffer height",
 303                       old_key->drawable_height, key->drawable_height);
 304    found |= key_debug(brw, "input slots valid",
 305                       old_key->input_slots_valid, key->input_slots_valid);
 306    found |= key_debug(brw, "mrt alpha test function",
 307                       old_key->alpha_test_func, key->alpha_test_func);
 308    found |= key_debug(brw, "mrt alpha test reference value",
 309                       old_key->alpha_test_ref, key->alpha_test_ref);
 310
 311    found |= brw_debug_recompile_sampler_key(brw, &old_key->tex, &key->tex);
 312
 313    if (!found) {
 314       perf_debug("  Something else\n");
 315    }
 316 }
 317
 318 void
 319 brw_populate_sampler_prog_key_data(struct gl_context *ctx,
 320                                    const struct gl_program *prog,
 321                                    unsigned sampler_count,
 322                                    struct brw_sampler_prog_key_data *key)
 323 {
 324    struct brw_context *brw = brw_context(ctx);
 325
 326    for (int s = 0; s < sampler_count; s++) {
 327       key->swizzles[s] = SWIZZLE_NOOP;
 328
 329       if (!(prog->SamplersUsed & (1 << s)))
 330          continue;
 331
 332       int unit_id = prog->SamplerUnits[s];
 333       const struct gl_texture_unit *unit = &ctx->Texture.Unit[unit_id];
 334
 335       if (unit->_ReallyEnabled && unit->_Current->Target != GL_TEXTURE_BUFFER) {
 336          const struct gl_texture_object *t = unit->_Current;
 337          const struct gl_texture_image *img = t->Image[0][t->BaseLevel];
 338          struct gl_sampler_object *sampler = _mesa_get_samplerobj(ctx, unit_id);
 339
 340          const bool alpha_depth = t->DepthMode == GL_ALPHA &&
 341             (img->_BaseFormat == GL_DEPTH_COMPONENT ||
 342              img->_BaseFormat == GL_DEPTH_STENCIL);
 343
 344          /* Haswell handles texture swizzling as surface format overrides
 345           * (except for GL_ALPHA); all other platforms need MOVs in the shader.
 346           */
 347          if (alpha_depth || (brw->gen < 8 && !brw->is_haswell))
 348             key->swizzles[s] = brw_get_texture_swizzle(ctx, t);
 349
 350          if (img->InternalFormat == GL_YCBCR_MESA) {
 351             key->yuvtex_mask |= 1 << s;
 352             if (img->TexFormat == MESA_FORMAT_YCBCR)
 353                 key->yuvtex_swap_mask |= 1 << s;
 354          }
 355
 356          if (sampler->MinFilter != GL_NEAREST &&
 357              sampler->MagFilter != GL_NEAREST) {
 358             if (sampler->WrapS == GL_CLAMP)
 359                key->gl_clamp_mask[0] |= 1 << s;
 360             if (sampler->WrapT == GL_CLAMP)
 361                key->gl_clamp_mask[1] |= 1 << s;
 362             if (sampler->WrapR == GL_CLAMP)
 363                key->gl_clamp_mask[2] |= 1 << s;
 364          }
 365
 366          /* gather4's channel select for green from RG32F is broken;
 367           * requires a shader w/a on IVB; fixable with just SCS on HSW. */
 368          if (brw->gen == 7 && !brw->is_haswell && prog->UsesGather) {
 369             if (img->InternalFormat == GL_RG32F)
 370                key->gather_channel_quirk_mask |= 1 << s;
 371          }
 372
 373          /* If this is a multisample sampler, and uses the CMS MSAA layout,
 374           * then we need to emit slightly different code to first sample the
 375           * MCS surface.
 376           */
 377          struct intel_texture_object *intel_tex =
 378             intel_texture_object((struct gl_texture_object *)t);
 379
 380          if (brw->gen >= 7 &&
 381              intel_tex->mt->msaa_layout == INTEL_MSAA_LAYOUT_CMS) {
 382             key->compressed_multisample_layout_mask |= 1 << s;
 383          }
 384       }
 385    }
 386 }
 387
 388 static void brw_wm_populate_key( struct brw_context *brw,
 389                                  struct brw_wm_prog_key *key )
 390 {
 391    struct gl_context *ctx = &brw->ctx;
 392    /* BRW_NEW_FRAGMENT_PROGRAM */
 393    const struct brw_fragment_program *fp =
 394       (struct brw_fragment_program *)brw->fragment_program;
 395    const struct gl_program *prog = (struct gl_program *) brw->fragment_program;
 396    GLuint lookup = 0;
 397    GLuint line_aa;
 398    bool program_uses_dfdy = fp->program.UsesDFdy;
 399    bool multisample_fbo = ctx->DrawBuffer->Visual.samples > 1;
 400
 401    memset(key, 0, sizeof(*key));
 402
 403    /* Build the index for table lookup
 404     */
 405    if (brw->gen < 6) {
 406       /* _NEW_COLOR */
 407       if (fp->program.UsesKill || ctx->Color.AlphaEnabled)
 408          lookup |= IZ_PS_KILL_ALPHATEST_BIT;
 409
 410       if (fp->program.Base.OutputsWritten & BITFIELD64_BIT(FRAG_RESULT_DEPTH))
 411          lookup |= IZ_PS_COMPUTES_DEPTH_BIT;
 412
 413       /* _NEW_DEPTH */
 414       if (ctx->Depth.Test)
 415          lookup |= IZ_DEPTH_TEST_ENABLE_BIT;
 416
 417       if (ctx->Depth.Test && ctx->Depth.Mask) /* ?? */
 418          lookup |= IZ_DEPTH_WRITE_ENABLE_BIT;
 419
 420       /* _NEW_STENCIL | _NEW_BUFFERS */
 421       if (ctx->Stencil._Enabled) {
 422          lookup |= IZ_STENCIL_TEST_ENABLE_BIT;
 423
 424          if (ctx->Stencil.WriteMask[0] ||
 425              ctx->Stencil.WriteMask[ctx->Stencil._BackFace])
 426             lookup |= IZ_STENCIL_WRITE_ENABLE_BIT;
 427       }
 428       key->iz_lookup = lookup;
 429    }
 430
 431    line_aa = AA_NEVER;
 432
 433    /* _NEW_LINE, _NEW_POLYGON, BRW_NEW_REDUCED_PRIMITIVE */
 434    if (ctx->Line.SmoothFlag) {
 435       if (brw->reduced_primitive == GL_LINES) {
 436          line_aa = AA_ALWAYS;
 437       }
 438       else if (brw->reduced_primitive == GL_TRIANGLES) {
 439          if (ctx->Polygon.FrontMode == GL_LINE) {
 440             line_aa = AA_SOMETIMES;
 441
 442             if (ctx->Polygon.BackMode == GL_LINE ||
 443                 (ctx->Polygon.CullFlag &&
 444                  ctx->Polygon.CullFaceMode == GL_BACK))
 445                line_aa = AA_ALWAYS;
 446          }
 447          else if (ctx->Polygon.BackMode == GL_LINE) {
 448             line_aa = AA_SOMETIMES;
 449
 450             if ((ctx->Polygon.CullFlag &&
 451                  ctx->Polygon.CullFaceMode == GL_FRONT))
 452                line_aa = AA_ALWAYS;
 453          }
 454       }
 455    }
 456
 457    key->line_aa = line_aa;
 458
 459    /* _NEW_HINT */
 460    if (brw->disable_derivative_optimization) {
 461       key->high_quality_derivatives =
 462          ctx->Hint.FragmentShaderDerivative != GL_FASTEST;
 463    } else {
 464       key->high_quality_derivatives =
 465          ctx->Hint.FragmentShaderDerivative == GL_NICEST;
 466    }
 467
 468    if (brw->gen < 6)
 469       key->stats_wm = brw->stats_wm;
 470
 471    /* _NEW_LIGHT */
 472    key->flat_shade = (ctx->Light.ShadeModel == GL_FLAT);
 473
 474    /* _NEW_FRAG_CLAMP | _NEW_BUFFERS */
 475    key->clamp_fragment_color = ctx->Color._ClampFragmentColor;
 476
 477    /* _NEW_TEXTURE */
 478    brw_populate_sampler_prog_key_data(ctx, prog, brw->wm.base.sampler_count,
 479                                       &key->tex);
 480
 481    /* _NEW_BUFFERS */
 482    /*
 483     * Include the draw buffer origin and height so that we can calculate
 484     * fragment position values relative to the bottom left of the drawable,
 485     * from the incoming screen origin relative position we get as part of our
 486     * payload.
 487     *
 488     * This is only needed for the WM_WPOSXY opcode when the fragment program
 489     * uses the gl_FragCoord input.
 490     *
 491     * We could avoid recompiling by including this as a constant referenced by
 492     * our program, but if we were to do that it would also be nice to handle
 493     * getting that constant updated at batchbuffer submit time (when we
 494     * hold the lock and know where the buffer really is) rather than at emit
 495     * time when we don't hold the lock and are just guessing.  We could also
 496     * just avoid using this as key data if the program doesn't use
 497     * fragment.position.
 498     *
 499     * For DRI2 the origin_x/y will always be (0,0) but we still need the
 500     * drawable height in order to invert the Y axis.
 501     */
 502    if (fp->program.Base.InputsRead & VARYING_BIT_POS) {
 503       key->drawable_height = ctx->DrawBuffer->Height;
 504    }
 505
 506    if ((fp->program.Base.InputsRead & VARYING_BIT_POS) || program_uses_dfdy) {
 507       key->render_to_fbo = _mesa_is_user_fbo(ctx->DrawBuffer);
 508    }
 509
 510    /* _NEW_BUFFERS */
 511    key->nr_color_regions = ctx->DrawBuffer->_NumColorDrawBuffers;
 512
 513    /* _NEW_MULTISAMPLE, _NEW_COLOR, _NEW_BUFFERS */
 514    key->replicate_alpha = ctx->DrawBuffer->_NumColorDrawBuffers > 1 &&
 515       (ctx->Multisample.SampleAlphaToCoverage || ctx->Color.AlphaEnabled);
 516
 517    /* _NEW_BUFFERS _NEW_MULTISAMPLE */
 518    /* Ignore sample qualifier while computing this flag. */
 519    key->persample_shading =
 520       _mesa_get_min_invocations_per_fragment(ctx, &fp->program, true) > 1;
 521
 522    key->compute_pos_offset =
 523       _mesa_get_min_invocations_per_fragment(ctx, &fp->program, false) > 1 &&
 524       fp->program.Base.SystemValuesRead & SYSTEM_BIT_SAMPLE_POS;
 525
 526    key->compute_sample_id =
 527       multisample_fbo &&
 528       ctx->Multisample.Enabled &&
 529       (fp->program.Base.SystemValuesRead & SYSTEM_BIT_SAMPLE_ID);
 530
 531    /* BRW_NEW_VUE_MAP_GEOM_OUT */
 532    if (brw->gen < 6 || _mesa_bitcount_64(fp->program.Base.InputsRead &
 533                                          BRW_FS_VARYING_INPUT_MASK) > 16)
 534       key->input_slots_valid = brw->vue_map_geom_out.slots_valid;
 535
 536
 537    /* _NEW_COLOR | _NEW_BUFFERS */
 538    /* Pre-gen6, the hardware alpha test always used each render
 539     * target's alpha to do alpha test, as opposed to render target 0's alpha
 540     * like GL requires.  Fix that by building the alpha test into the
 541     * shader, and we'll skip enabling the fixed function alpha test.
 542     */
 543    if (brw->gen < 6 && ctx->DrawBuffer->_NumColorDrawBuffers > 1 && ctx->Color.AlphaEnabled) {
 544       key->alpha_test_func = ctx->Color.AlphaFunc;
 545       key->alpha_test_ref = ctx->Color.AlphaRef;
 546    }
 547
 548    /* The unique fragment program ID */
 549    key->program_string_id = fp->id;
 550 }
 551
 552
 553 static void
 554 brw_upload_wm_prog(struct brw_context *brw)
 555 {
 556    struct gl_context *ctx = &brw->ctx;
 557    struct brw_wm_prog_key key;
 558    struct brw_fragment_program *fp = (struct brw_fragment_program *)
 559       brw->fragment_program;
 560
 561    brw_wm_populate_key(brw, &key);
 562
 563    if (!brw_search_cache(&brw->cache, BRW_WM_PROG,
 564                          &key, sizeof(key),
 565                          &brw->wm.base.prog_offset, &brw->wm.prog_data)) {
 566       bool success = do_wm_prog(brw, ctx->Shader._CurrentFragmentProgram, fp,
 567                                 &key);
 568       (void) success;
 569       assert(success);
 570    }
 571    brw->wm.base.prog_data = &brw->wm.prog_data->base;
 572 }
 573
 574
 575 const struct brw_tracked_state brw_wm_prog = {
 576    .dirty = {
 577       .mesa  = (_NEW_COLOR |
 578                 _NEW_DEPTH |
 579                 _NEW_STENCIL |
 580                 _NEW_POLYGON |
 581                 _NEW_LINE |
 582                 _NEW_HINT |
 583                 _NEW_LIGHT |
 584                 _NEW_FRAG_CLAMP |
 585                 _NEW_BUFFERS |
 586                 _NEW_TEXTURE |
 587                 _NEW_MULTISAMPLE),
 588       .brw   = (BRW_NEW_FRAGMENT_PROGRAM |
 589                 BRW_NEW_REDUCED_PRIMITIVE |
 590                 BRW_NEW_VUE_MAP_GEOM_OUT |
 591                 BRW_NEW_STATS_WM)
 592    },
 593    .emit = brw_upload_wm_prog
 594 };
 595