src/compiler/glsl/ast_type.cpp

   1 /*
   2  * Copyright © 2010 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include "ast.h"
  25
  26 void
  27 ast_type_specifier::print(void) const
  28 {
  29    if (structure) {
  30       structure->print();
  31    } else {
  32       printf("%s ", type_name);
  33    }
  34
  35    if (array_specifier) {
  36       array_specifier->print();
  37    }
  38 }
  39
  40 bool
  41 ast_fully_specified_type::has_qualifiers(_mesa_glsl_parse_state *state) const
  42 {
  43    /* 'subroutine' isnt a real qualifier. */
  44    ast_type_qualifier subroutine_only;
  45    subroutine_only.flags.i = 0;
  46    subroutine_only.flags.q.subroutine = 1;
  47    subroutine_only.flags.q.subroutine_def = 1;
  48    if (state->has_explicit_uniform_location()) {
  49       subroutine_only.flags.q.explicit_index = 1;
  50    }
  51    return (this->qualifier.flags.i & ~subroutine_only.flags.i) != 0;
  52 }
  53
  54 bool ast_type_qualifier::has_interpolation() const
  55 {
  56    return this->flags.q.smooth
  57           || this->flags.q.flat
  58           || this->flags.q.noperspective;
  59 }
  60
  61 bool
  62 ast_type_qualifier::has_layout() const
  63 {
  64    return this->flags.q.origin_upper_left
  65           || this->flags.q.pixel_center_integer
  66           || this->flags.q.depth_any
  67           || this->flags.q.depth_greater
  68           || this->flags.q.depth_less
  69           || this->flags.q.depth_unchanged
  70           || this->flags.q.std140
  71           || this->flags.q.std430
  72           || this->flags.q.shared
  73           || this->flags.q.column_major
  74           || this->flags.q.row_major
  75           || this->flags.q.packed
  76           || this->flags.q.explicit_align
  77           || this->flags.q.explicit_component
  78           || this->flags.q.explicit_location
  79           || this->flags.q.explicit_image_format
  80           || this->flags.q.explicit_index
  81           || this->flags.q.explicit_binding
  82           || this->flags.q.explicit_offset
  83           || this->flags.q.explicit_stream
  84           || this->flags.q.explicit_xfb_buffer
  85           || this->flags.q.explicit_xfb_offset
  86           || this->flags.q.explicit_xfb_stride;
  87 }
  88
  89 bool
  90 ast_type_qualifier::has_storage() const
  91 {
  92    return this->flags.q.constant
  93           || this->flags.q.attribute
  94           || this->flags.q.varying
  95           || this->flags.q.in
  96           || this->flags.q.out
  97           || this->flags.q.uniform
  98           || this->flags.q.buffer
  99           || this->flags.q.shared_storage;
 100 }
 101
 102 bool
 103 ast_type_qualifier::has_auxiliary_storage() const
 104 {
 105    return this->flags.q.centroid
 106           || this->flags.q.sample
 107           || this->flags.q.patch;
 108 }
 109
 110 bool ast_type_qualifier::has_memory() const
 111 {
 112    return this->flags.q.coherent
 113           || this->flags.q._volatile
 114           || this->flags.q.restrict_flag
 115           || this->flags.q.read_only
 116           || this->flags.q.write_only;
 117 }
 118
 119 static bool
 120 validate_prim_type(YYLTYPE *loc,
 121                    _mesa_glsl_parse_state *state,
 122                    const ast_type_qualifier &qualifier,
 123                    const ast_type_qualifier &new_qualifier)
 124 {
 125    /* Input layout qualifiers can be specified multiple
 126     * times in separate declarations, as long as they match.
 127     */
 128    if (qualifier.flags.q.prim_type && new_qualifier.flags.q.prim_type
 129        && qualifier.prim_type != new_qualifier.prim_type) {
 130       _mesa_glsl_error(loc, state,
 131                        "conflicting input primitive %s specified",
 132                        state->stage == MESA_SHADER_GEOMETRY ?
 133                        "type" : "mode");
 134       return false;
 135    }
 136
 137    return true;
 138 }
 139
 140 static bool
 141 validate_vertex_spacing(YYLTYPE *loc,
 142                         _mesa_glsl_parse_state *state,
 143                         const ast_type_qualifier &qualifier,
 144                         const ast_type_qualifier &new_qualifier)
 145 {
 146    if (qualifier.flags.q.vertex_spacing && new_qualifier.flags.q.vertex_spacing
 147        && qualifier.vertex_spacing != new_qualifier.vertex_spacing) {
 148       _mesa_glsl_error(loc, state,
 149                        "conflicting vertex spacing specified");
 150       return false;
 151    }
 152
 153    return true;
 154 }
 155
 156 static bool
 157 validate_ordering(YYLTYPE *loc,
 158                   _mesa_glsl_parse_state *state,
 159                   const ast_type_qualifier &qualifier,
 160                   const ast_type_qualifier &new_qualifier)
 161 {
 162    if (qualifier.flags.q.ordering && new_qualifier.flags.q.ordering
 163        && qualifier.ordering != new_qualifier.ordering) {
 164       _mesa_glsl_error(loc, state,
 165                        "conflicting ordering specified");
 166       return false;
 167    }
 168
 169    return true;
 170 }
 171
 172 static bool
 173 validate_point_mode(MAYBE_UNUSED const ast_type_qualifier &qualifier,
 174                     MAYBE_UNUSED const ast_type_qualifier &new_qualifier)
 175 {
 176    /* Point mode can only be true if the flag is set. */
 177    assert (!qualifier.flags.q.point_mode || !new_qualifier.flags.q.point_mode
 178            || (qualifier.point_mode && new_qualifier.point_mode));
 179
 180    return true;
 181 }
 182
 183 /**
 184  * This function merges duplicate layout identifiers.
 185  *
 186  * It deals with duplicates within a single layout qualifier, among multiple
 187  * layout qualifiers on a single declaration and on several declarations for
 188  * the same variable.
 189  *
 190  * The is_single_layout_merge and is_multiple_layouts_merge parameters are
 191  * used to differentiate among them.
 192  */
 193 bool
 194 ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 195                                     _mesa_glsl_parse_state *state,
 196                                     const ast_type_qualifier &q,
 197                                     bool is_single_layout_merge,
 198                                     bool is_multiple_layouts_merge)
 199 {
 200    bool r = true;
 201    ast_type_qualifier ubo_mat_mask;
 202    ubo_mat_mask.flags.i = 0;
 203    ubo_mat_mask.flags.q.row_major = 1;
 204    ubo_mat_mask.flags.q.column_major = 1;
 205
 206    ast_type_qualifier ubo_layout_mask;
 207    ubo_layout_mask.flags.i = 0;
 208    ubo_layout_mask.flags.q.std140 = 1;
 209    ubo_layout_mask.flags.q.packed = 1;
 210    ubo_layout_mask.flags.q.shared = 1;
 211    ubo_layout_mask.flags.q.std430 = 1;
 212
 213    ast_type_qualifier ubo_binding_mask;
 214    ubo_binding_mask.flags.i = 0;
 215    ubo_binding_mask.flags.q.explicit_binding = 1;
 216    ubo_binding_mask.flags.q.explicit_offset = 1;
 217
 218    ast_type_qualifier stream_layout_mask;
 219    stream_layout_mask.flags.i = 0;
 220    stream_layout_mask.flags.q.stream = 1;
 221
 222    /* FIXME: We should probably do interface and function param validation
 223     * separately.
 224     */
 225    ast_type_qualifier input_layout_mask;
 226    input_layout_mask.flags.i = 0;
 227    input_layout_mask.flags.q.centroid = 1;
 228    /* Function params can have constant */
 229    input_layout_mask.flags.q.constant = 1;
 230    input_layout_mask.flags.q.explicit_component = 1;
 231    input_layout_mask.flags.q.explicit_location = 1;
 232    input_layout_mask.flags.q.flat = 1;
 233    input_layout_mask.flags.q.in = 1;
 234    input_layout_mask.flags.q.invariant = 1;
 235    input_layout_mask.flags.q.noperspective = 1;
 236    input_layout_mask.flags.q.origin_upper_left = 1;
 237    /* Function params 'inout' will set this */
 238    input_layout_mask.flags.q.out = 1;
 239    input_layout_mask.flags.q.patch = 1;
 240    input_layout_mask.flags.q.pixel_center_integer = 1;
 241    input_layout_mask.flags.q.precise = 1;
 242    input_layout_mask.flags.q.sample = 1;
 243    input_layout_mask.flags.q.smooth = 1;
 244
 245    /* Uniform block layout qualifiers get to overwrite each
 246     * other (rightmost having priority), while all other
 247     * qualifiers currently don't allow duplicates.
 248     */
 249    ast_type_qualifier allowed_duplicates_mask;
 250    allowed_duplicates_mask.flags.i =
 251       ubo_mat_mask.flags.i |
 252       ubo_layout_mask.flags.i |
 253       ubo_binding_mask.flags.i;
 254
 255    /* Geometry shaders can have several layout qualifiers
 256     * assigning different stream values.
 257     */
 258    if (state->stage == MESA_SHADER_GEOMETRY) {
 259       allowed_duplicates_mask.flags.i |=
 260          stream_layout_mask.flags.i;
 261    }
 262
 263    if (is_single_layout_merge && !state->has_enhanced_layouts() &&
 264        (this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 265       _mesa_glsl_error(loc, state, "duplicate layout qualifiers used");
 266       return false;
 267    }
 268
 269    if (is_multiple_layouts_merge && !state->has_420pack_or_es31()) {
 270       _mesa_glsl_error(loc, state,
 271                        "duplicate layout(...) qualifiers");
 272       return false;
 273    }
 274
 275    if (q.flags.q.prim_type) {
 276       r &= validate_prim_type(loc, state, *this, q);
 277       this->flags.q.prim_type = 1;
 278       this->prim_type = q.prim_type;
 279    }
 280
 281    if (q.flags.q.max_vertices) {
 282       if (this->flags.q.max_vertices
 283           && !is_single_layout_merge && !is_multiple_layouts_merge) {
 284          this->max_vertices->merge_qualifier(q.max_vertices);
 285       } else {
 286          this->flags.q.max_vertices = 1;
 287          this->max_vertices = q.max_vertices;
 288       }
 289    }
 290
 291    if (q.flags.q.subroutine_def) {
 292       if (this->flags.q.subroutine_def) {
 293          _mesa_glsl_error(loc, state,
 294                           "conflicting subroutine qualifiers used");
 295       } else {
 296          this->subroutine_list = q.subroutine_list;
 297       }
 298    }
 299
 300    if (q.flags.q.invocations) {
 301       if (this->flags.q.invocations
 302           && !is_single_layout_merge && !is_multiple_layouts_merge) {
 303          this->invocations->merge_qualifier(q.invocations);
 304       } else {
 305          this->flags.q.invocations = 1;
 306          this->invocations = q.invocations;
 307       }
 308    }
 309
 310    if (state->stage == MESA_SHADER_GEOMETRY &&
 311        state->has_explicit_attrib_stream()) {
 312       if (!this->flags.q.explicit_stream) {
 313          if (q.flags.q.stream) {
 314             this->flags.q.stream = 1;
 315             this->stream = q.stream;
 316          } else if (!this->flags.q.stream && this->flags.q.out &&
 317                     !this->flags.q.in) {
 318             /* Assign default global stream value */
 319             this->flags.q.stream = 1;
 320             this->stream = state->out_qualifier->stream;
 321          }
 322       }
 323    }
 324
 325    if (state->has_enhanced_layouts()) {
 326       if (!this->flags.q.explicit_xfb_buffer) {
 327          if (q.flags.q.xfb_buffer) {
 328             this->flags.q.xfb_buffer = 1;
 329             this->xfb_buffer = q.xfb_buffer;
 330          } else if (!this->flags.q.xfb_buffer && this->flags.q.out &&
 331                     !this->flags.q.in) {
 332             /* Assign global xfb_buffer value */
 333             this->flags.q.xfb_buffer = 1;
 334             this->xfb_buffer = state->out_qualifier->xfb_buffer;
 335          }
 336       }
 337
 338       if (q.flags.q.explicit_xfb_stride) {
 339          this->flags.q.xfb_stride = 1;
 340          this->flags.q.explicit_xfb_stride = 1;
 341          this->xfb_stride = q.xfb_stride;
 342       }
 343    }
 344
 345    if (q.flags.q.vertices) {
 346       if (this->flags.q.vertices
 347           && !is_single_layout_merge && !is_multiple_layouts_merge) {
 348          this->vertices->merge_qualifier(q.vertices);
 349       } else {
 350          this->flags.q.vertices = 1;
 351          this->vertices = q.vertices;
 352       }
 353    }
 354
 355    if (q.flags.q.vertex_spacing) {
 356       r &= validate_vertex_spacing(loc, state, *this, q);
 357       this->flags.q.vertex_spacing = 1;
 358       this->vertex_spacing = q.vertex_spacing;
 359    }
 360
 361    if (q.flags.q.ordering) {
 362       r &= validate_ordering(loc, state, *this, q);
 363       this->flags.q.ordering = 1;
 364       this->ordering = q.ordering;
 365    }
 366
 367    if (q.flags.q.point_mode) {
 368       r &= validate_point_mode(*this, q);
 369       this->flags.q.point_mode = 1;
 370       this->point_mode = q.point_mode;
 371    }
 372
 373    if (q.flags.q.early_fragment_tests)
 374       this->flags.q.early_fragment_tests = true;
 375
 376    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 377       this->flags.i &= ~ubo_mat_mask.flags.i;
 378    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 379       this->flags.i &= ~ubo_layout_mask.flags.i;
 380
 381    for (int i = 0; i < 3; i++) {
 382       if (q.flags.q.local_size & (1 << i)) {
 383          if (this->local_size[i]
 384              && !is_single_layout_merge && !is_multiple_layouts_merge) {
 385             this->local_size[i]->merge_qualifier(q.local_size[i]);
 386          } else {
 387             this->local_size[i] = q.local_size[i];
 388          }
 389       }
 390    }
 391
 392    if (q.flags.q.local_size_variable)
 393       this->flags.q.local_size_variable = true;
 394
 395    this->flags.i |= q.flags.i;
 396
 397    if (this->flags.q.in &&
 398        (this->flags.i & ~input_layout_mask.flags.i) != 0) {
 399       _mesa_glsl_error(loc, state, "invalid input layout qualifier used");
 400       return false;
 401    }
 402
 403    if (q.flags.q.explicit_align)
 404       this->align = q.align;
 405
 406    if (q.flags.q.explicit_location)
 407       this->location = q.location;
 408
 409    if (q.flags.q.explicit_index)
 410       this->index = q.index;
 411
 412   if (q.flags.q.explicit_component)
 413       this->component = q.component;
 414
 415    if (q.flags.q.explicit_binding)
 416       this->binding = q.binding;
 417
 418    if (q.flags.q.explicit_offset || q.flags.q.explicit_xfb_offset)
 419       this->offset = q.offset;
 420
 421    if (q.precision != ast_precision_none)
 422       this->precision = q.precision;
 423
 424    if (q.flags.q.explicit_image_format) {
 425       this->image_format = q.image_format;
 426       this->image_base_type = q.image_base_type;
 427    }
 428
 429    return r;
 430 }
 431
 432 bool
 433 ast_type_qualifier::validate_out_qualifier(YYLTYPE *loc,
 434                                            _mesa_glsl_parse_state *state)
 435 {
 436    bool r = true;
 437    ast_type_qualifier valid_out_mask;
 438    valid_out_mask.flags.i = 0;
 439
 440    switch (state->stage) {
 441    case MESA_SHADER_GEOMETRY:
 442       if (this->flags.q.prim_type) {
 443          /* Make sure this is a valid output primitive type. */
 444          switch (this->prim_type) {
 445          case GL_POINTS:
 446          case GL_LINE_STRIP:
 447          case GL_TRIANGLE_STRIP:
 448             break;
 449          default:
 450             r = false;
 451             _mesa_glsl_error(loc, state, "invalid geometry shader output "
 452                              "primitive type");
 453             break;
 454          }
 455       }
 456
 457       valid_out_mask.flags.q.stream = 1;
 458       valid_out_mask.flags.q.explicit_stream = 1;
 459       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 460       valid_out_mask.flags.q.xfb_buffer = 1;
 461       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 462       valid_out_mask.flags.q.xfb_stride = 1;
 463       valid_out_mask.flags.q.max_vertices = 1;
 464       valid_out_mask.flags.q.prim_type = 1;
 465       break;
 466    case MESA_SHADER_TESS_CTRL:
 467       valid_out_mask.flags.q.vertices = 1;
 468       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 469       valid_out_mask.flags.q.xfb_buffer = 1;
 470       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 471       valid_out_mask.flags.q.xfb_stride = 1;
 472       break;
 473    case MESA_SHADER_TESS_EVAL:
 474    case MESA_SHADER_VERTEX:
 475       valid_out_mask.flags.q.explicit_xfb_buffer = 1;
 476       valid_out_mask.flags.q.xfb_buffer = 1;
 477       valid_out_mask.flags.q.explicit_xfb_stride = 1;
 478       valid_out_mask.flags.q.xfb_stride = 1;
 479       break;
 480    case MESA_SHADER_FRAGMENT:
 481       valid_out_mask.flags.q.blend_support = 1;
 482       break;
 483    default:
 484       r = false;
 485       _mesa_glsl_error(loc, state,
 486                        "out layout qualifiers only valid in "
 487                        "geometry, tessellation, vertex and fragment shaders");
 488    }
 489
 490    /* Generate an error when invalid output layout qualifiers are used. */
 491    if ((this->flags.i & ~valid_out_mask.flags.i) != 0) {
 492       r = false;
 493       _mesa_glsl_error(loc, state, "invalid output layout qualifiers used");
 494    }
 495
 496    return r;
 497 }
 498
 499 bool
 500 ast_type_qualifier::merge_into_out_qualifier(YYLTYPE *loc,
 501                                              _mesa_glsl_parse_state *state,
 502                                              ast_node* &node)
 503 {
 504    const bool r = state->out_qualifier->merge_qualifier(loc, state,
 505                                                         *this, false);
 506
 507    switch (state->stage) {
 508    case MESA_SHADER_GEOMETRY:
 509       /* Allow future assignments of global out's stream id value */
 510       state->out_qualifier->flags.q.explicit_stream = 0;
 511       break;
 512    case MESA_SHADER_TESS_CTRL:
 513       node = new(state->linalloc) ast_tcs_output_layout(*loc);
 514       break;
 515    default:
 516       break;
 517    }
 518
 519    /* Allow future assignments of global out's */
 520    state->out_qualifier->flags.q.explicit_xfb_buffer = 0;
 521    state->out_qualifier->flags.q.explicit_xfb_stride = 0;
 522
 523    return r;
 524 }
 525
 526 bool
 527 ast_type_qualifier::validate_in_qualifier(YYLTYPE *loc,
 528                                           _mesa_glsl_parse_state *state)
 529 {
 530    bool r = true;
 531    ast_type_qualifier valid_in_mask;
 532    valid_in_mask.flags.i = 0;
 533
 534    switch (state->stage) {
 535    case MESA_SHADER_TESS_EVAL:
 536       if (this->flags.q.prim_type) {
 537          /* Make sure this is a valid input primitive type. */
 538          switch (this->prim_type) {
 539          case GL_TRIANGLES:
 540          case GL_QUADS:
 541          case GL_ISOLINES:
 542             break;
 543          default:
 544             r = false;
 545             _mesa_glsl_error(loc, state,
 546                              "invalid tessellation evaluation "
 547                              "shader input primitive type");
 548             break;
 549          }
 550       }
 551
 552       valid_in_mask.flags.q.prim_type = 1;
 553       valid_in_mask.flags.q.vertex_spacing = 1;
 554       valid_in_mask.flags.q.ordering = 1;
 555       valid_in_mask.flags.q.point_mode = 1;
 556       break;
 557    case MESA_SHADER_GEOMETRY:
 558       if (this->flags.q.prim_type) {
 559          /* Make sure this is a valid input primitive type. */
 560          switch (this->prim_type) {
 561          case GL_POINTS:
 562          case GL_LINES:
 563          case GL_LINES_ADJACENCY:
 564          case GL_TRIANGLES:
 565          case GL_TRIANGLES_ADJACENCY:
 566             break;
 567          default:
 568             r = false;
 569             _mesa_glsl_error(loc, state,
 570                              "invalid geometry shader input primitive type");
 571             break;
 572          }
 573       }
 574
 575       valid_in_mask.flags.q.prim_type = 1;
 576       valid_in_mask.flags.q.invocations = 1;
 577       break;
 578    case MESA_SHADER_FRAGMENT:
 579       valid_in_mask.flags.q.early_fragment_tests = 1;
 580       valid_in_mask.flags.q.inner_coverage = 1;
 581       valid_in_mask.flags.q.post_depth_coverage = 1;
 582       break;
 583    case MESA_SHADER_COMPUTE:
 584       valid_in_mask.flags.q.local_size = 7;
 585       valid_in_mask.flags.q.local_size_variable = 1;
 586       break;
 587    default:
 588       r = false;
 589       _mesa_glsl_error(loc, state,
 590                        "input layout qualifiers only valid in "
 591                        "geometry, tessellation, fragment and compute shaders");
 592       break;
 593    }
 594
 595    /* Generate an error when invalid input layout qualifiers are used. */
 596    if ((this->flags.i & ~valid_in_mask.flags.i) != 0) {
 597       r = false;
 598       _mesa_glsl_error(loc, state, "invalid input layout qualifiers used");
 599    }
 600
 601    /* The checks below are also performed when merging but we want to spit an
 602     * error against the default global input qualifier as soon as we can, with
 603     * the closest error location in the shader.
 604     */
 605    r &= validate_prim_type(loc, state, *state->in_qualifier, *this);
 606    r &= validate_vertex_spacing(loc, state, *state->in_qualifier, *this);
 607    r &= validate_ordering(loc, state, *state->in_qualifier, *this);
 608    r &= validate_point_mode(*state->in_qualifier, *this);
 609
 610    return r;
 611 }
 612
 613 bool
 614 ast_type_qualifier::merge_into_in_qualifier(YYLTYPE *loc,
 615                                             _mesa_glsl_parse_state *state,
 616                                             ast_node* &node)
 617 {
 618    bool r = true;
 619    void *lin_ctx = state->linalloc;
 620
 621    /* We create the gs_input_layout node before merging so, in the future, no
 622     * more repeated nodes will be created as we will have the flag set.
 623     */
 624    if (state->stage == MESA_SHADER_GEOMETRY
 625        && this->flags.q.prim_type && !state->in_qualifier->flags.q.prim_type) {
 626       node = new(lin_ctx) ast_gs_input_layout(*loc, this->prim_type);
 627    }
 628
 629    r = state->in_qualifier->merge_qualifier(loc, state, *this, false);
 630
 631    if (state->in_qualifier->flags.q.early_fragment_tests) {
 632       state->fs_early_fragment_tests = true;
 633       state->in_qualifier->flags.q.early_fragment_tests = false;
 634    }
 635
 636    if (state->in_qualifier->flags.q.inner_coverage) {
 637       state->fs_inner_coverage = true;
 638       state->in_qualifier->flags.q.inner_coverage = false;
 639    }
 640
 641    if (state->in_qualifier->flags.q.post_depth_coverage) {
 642       state->fs_post_depth_coverage = true;
 643       state->in_qualifier->flags.q.post_depth_coverage = false;
 644    }
 645
 646    if (state->fs_inner_coverage && state->fs_post_depth_coverage) {
 647       _mesa_glsl_error(loc, state,
 648                        "inner_coverage & post_depth_coverage layout qualifiers "
 649                        "are mutally exclusives");
 650       r = false;
 651    }
 652
 653    /* We allow the creation of multiple cs_input_layout nodes. Coherence among
 654     * all existing nodes is checked later, when the AST node is transformed
 655     * into HIR.
 656     */
 657    if (state->in_qualifier->flags.q.local_size) {
 658       node = new(lin_ctx) ast_cs_input_layout(*loc,
 659                                               state->in_qualifier->local_size);
 660       state->in_qualifier->flags.q.local_size = 0;
 661       for (int i = 0; i < 3; i++)
 662          state->in_qualifier->local_size[i] = NULL;
 663    }
 664
 665    if (state->in_qualifier->flags.q.local_size_variable) {
 666       state->cs_input_local_size_variable_specified = true;
 667       state->in_qualifier->flags.q.local_size_variable = false;
 668    }
 669
 670    return r;
 671 }
 672
 673 bool
 674 ast_type_qualifier::push_to_global(YYLTYPE *loc,
 675                                    _mesa_glsl_parse_state *state)
 676 {
 677    if (this->flags.q.xfb_stride) {
 678       this->flags.q.xfb_stride = 0;
 679
 680       unsigned buff_idx;
 681       if (process_qualifier_constant(state, loc, "xfb_buffer",
 682                                      this->xfb_buffer, &buff_idx)) {
 683          if (state->out_qualifier->out_xfb_stride[buff_idx]) {
 684             state->out_qualifier->out_xfb_stride[buff_idx]->merge_qualifier(
 685                new(state->linalloc) ast_layout_expression(*loc,
 686                                                           this->xfb_stride));
 687          } else {
 688             state->out_qualifier->out_xfb_stride[buff_idx] =
 689                new(state->linalloc) ast_layout_expression(*loc,
 690                                                           this->xfb_stride);
 691          }
 692       }
 693    }
 694
 695    return true;
 696 }
 697
 698 /**
 699  * Check if the current type qualifier has any illegal flags.
 700  *
 701  * If so, print an error message, followed by a list of illegal flags.
 702  *
 703  * \param message        The error message to print.
 704  * \param allowed_flags  A list of valid flags.
 705  */
 706 bool
 707 ast_type_qualifier::validate_flags(YYLTYPE *loc,
 708                                    _mesa_glsl_parse_state *state,
 709                                    const ast_type_qualifier &allowed_flags,
 710                                    const char *message, const char *name)
 711 {
 712    ast_type_qualifier bad;
 713    bad.flags.i = this->flags.i & ~allowed_flags.flags.i;
 714    if (bad.flags.i == 0)
 715       return true;
 716
 717    _mesa_glsl_error(loc, state,
 718                     "%s '%s':"
 719                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 720                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s"
 721                     "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n",
 722                     message, name,
 723                     bad.flags.q.invariant ? " invariant" : "",
 724                     bad.flags.q.precise ? " precise" : "",
 725                     bad.flags.q.constant ? " constant" : "",
 726                     bad.flags.q.attribute ? " attribute" : "",
 727                     bad.flags.q.varying ? " varying" : "",
 728                     bad.flags.q.in ? " in" : "",
 729                     bad.flags.q.out ? " out" : "",
 730                     bad.flags.q.centroid ? " centroid" : "",
 731                     bad.flags.q.sample ? " sample" : "",
 732                     bad.flags.q.patch ? " patch" : "",
 733                     bad.flags.q.uniform ? " uniform" : "",
 734                     bad.flags.q.buffer ? " buffer" : "",
 735                     bad.flags.q.shared_storage ? " shared_storage" : "",
 736                     bad.flags.q.smooth ? " smooth" : "",
 737                     bad.flags.q.flat ? " flat" : "",
 738                     bad.flags.q.noperspective ? " noperspective" : "",
 739                     bad.flags.q.origin_upper_left ? " origin_upper_left" : "",
 740                     bad.flags.q.pixel_center_integer ? " pixel_center_integer" : "",
 741                     bad.flags.q.explicit_align ? " align" : "",
 742                     bad.flags.q.explicit_component ? " component" : "",
 743                     bad.flags.q.explicit_location ? " location" : "",
 744                     bad.flags.q.explicit_index ? " index" : "",
 745                     bad.flags.q.explicit_binding ? " binding" : "",
 746                     bad.flags.q.explicit_offset ? " offset" : "",
 747                     bad.flags.q.depth_any ? " depth_any" : "",
 748                     bad.flags.q.depth_greater ? " depth_greater" : "",
 749                     bad.flags.q.depth_less ? " depth_less" : "",
 750                     bad.flags.q.depth_unchanged ? " depth_unchanged" : "",
 751                     bad.flags.q.std140 ? " std140" : "",
 752                     bad.flags.q.std430 ? " std430" : "",
 753                     bad.flags.q.shared ? " shared" : "",
 754                     bad.flags.q.packed ? " packed" : "",
 755                     bad.flags.q.column_major ? " column_major" : "",
 756                     bad.flags.q.row_major ? " row_major" : "",
 757                     bad.flags.q.prim_type ? " prim_type" : "",
 758                     bad.flags.q.max_vertices ? " max_vertices" : "",
 759                     bad.flags.q.local_size ? " local_size" : "",
 760                     bad.flags.q.local_size_variable ? " local_size_variable" : "",
 761                     bad.flags.q.early_fragment_tests ? " early_fragment_tests" : "",
 762                     bad.flags.q.explicit_image_format ? " image_format" : "",
 763                     bad.flags.q.coherent ? " coherent" : "",
 764                     bad.flags.q._volatile ? " _volatile" : "",
 765                     bad.flags.q.restrict_flag ? " restrict_flag" : "",
 766                     bad.flags.q.read_only ? " read_only" : "",
 767                     bad.flags.q.write_only ? " write_only" : "",
 768                     bad.flags.q.invocations ? " invocations" : "",
 769                     bad.flags.q.stream ? " stream" : "",
 770                     bad.flags.q.explicit_stream ? " stream" : "",
 771                     bad.flags.q.explicit_xfb_offset ? " xfb_offset" : "",
 772                     bad.flags.q.xfb_buffer ? " xfb_buffer" : "",
 773                     bad.flags.q.explicit_xfb_buffer ? " xfb_buffer" : "",
 774                     bad.flags.q.xfb_stride ? " xfb_stride" : "",
 775                     bad.flags.q.explicit_xfb_stride ? " xfb_stride" : "",
 776                     bad.flags.q.vertex_spacing ? " vertex_spacing" : "",
 777                     bad.flags.q.ordering ? " ordering" : "",
 778                     bad.flags.q.point_mode ? " point_mode" : "",
 779                     bad.flags.q.vertices ? " vertices" : "",
 780                     bad.flags.q.subroutine ? " subroutine" : "",
 781                     bad.flags.q.subroutine_def ? " subroutine_def" : "",
 782                     bad.flags.q.inner_coverage ? " inner_coverage" : "",
 783                     bad.flags.q.post_depth_coverage ? " post_depth_coverage" : "");
 784    return false;
 785 }
 786
 787 bool
 788 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 789                                                   const char *qual_indentifier,
 790                                                   unsigned *value,
 791                                                   bool can_be_zero)
 792 {
 793    int min_value = 0;
 794    bool first_pass = true;
 795    *value = 0;
 796
 797    if (!can_be_zero)
 798       min_value = 1;
 799
 800    for (exec_node *node = layout_const_expressions.get_head_raw();
 801         !node->is_tail_sentinel(); node = node->next) {
 802
 803       exec_list dummy_instructions;
 804       ast_node *const_expression = exec_node_data(ast_node, node, link);
 805
 806       ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 807
 808       ir_constant *const const_int = ir->constant_expression_value();
 809       if (const_int == NULL || !const_int->type->is_integer()) {
 810          YYLTYPE loc = const_expression->get_location();
 811          _mesa_glsl_error(&loc, state, "%s must be an integral constant "
 812                           "expression", qual_indentifier);
 813          return false;
 814       }
 815
 816       if (const_int->value.i[0] < min_value) {
 817          YYLTYPE loc = const_expression->get_location();
 818          _mesa_glsl_error(&loc, state, "%s layout qualifier is invalid "
 819                           "(%d < %d)", qual_indentifier,
 820                           const_int->value.i[0], min_value);
 821          return false;
 822       }
 823
 824       if (!first_pass && *value != const_int->value.u[0]) {
 825          YYLTYPE loc = const_expression->get_location();
 826          _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
 827                           "match previous declaration (%d vs %d)",
 828                           qual_indentifier, *value, const_int->value.i[0]);
 829          return false;
 830       } else {
 831          first_pass = false;
 832          *value = const_int->value.u[0];
 833       }
 834
 835       /* If the location is const (and we've verified that
 836        * it is) then no instructions should have been emitted
 837        * when we converted it to HIR. If they were emitted,
 838        * then either the location isn't const after all, or
 839        * we are emitting unnecessary instructions.
 840        */
 841       assert(dummy_instructions.is_empty());
 842    }
 843
 844    return true;
 845 }
 846
 847 bool
 848 process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 849                            YYLTYPE *loc,
 850                            const char *qual_indentifier,
 851                            ast_expression *const_expression,
 852                            unsigned *value)
 853 {
 854    exec_list dummy_instructions;
 855
 856    if (const_expression == NULL) {
 857       *value = 0;
 858       return true;
 859    }
 860
 861    ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 862
 863    ir_constant *const const_int = ir->constant_expression_value();
 864    if (const_int == NULL || !const_int->type->is_integer()) {
 865       _mesa_glsl_error(loc, state, "%s must be an integral constant "
 866                        "expression", qual_indentifier);
 867       return false;
 868    }
 869
 870    if (const_int->value.i[0] < 0) {
 871       _mesa_glsl_error(loc, state, "%s layout qualifier is invalid (%d < 0)",
 872                        qual_indentifier, const_int->value.u[0]);
 873       return false;
 874    }
 875
 876    /* If the location is const (and we've verified that
 877     * it is) then no instructions should have been emitted
 878     * when we converted it to HIR. If they were emitted,
 879     * then either the location isn't const after all, or
 880     * we are emitting unnecessary instructions.
 881     */
 882    assert(dummy_instructions.is_empty());
 883
 884    *value = const_int->value.u[0];
 885    return true;
 886 }