src/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_location
  77           || this->flags.q.explicit_index
  78           || this->flags.q.explicit_binding
  79           || this->flags.q.explicit_offset;
  80 }
  81
  82 bool
  83 ast_type_qualifier::has_storage() const
  84 {
  85    return this->flags.q.constant
  86           || this->flags.q.attribute
  87           || this->flags.q.varying
  88           || this->flags.q.in
  89           || this->flags.q.out
  90           || this->flags.q.uniform
  91           || this->flags.q.buffer
  92           || this->flags.q.shared_storage;
  93 }
  94
  95 bool
  96 ast_type_qualifier::has_auxiliary_storage() const
  97 {
  98    return this->flags.q.centroid
  99           || this->flags.q.sample
 100           || this->flags.q.patch;
 101 }
 102
 103 const char*
 104 ast_type_qualifier::interpolation_string() const
 105 {
 106    if (this->flags.q.smooth)
 107       return "smooth";
 108    else if (this->flags.q.flat)
 109       return "flat";
 110    else if (this->flags.q.noperspective)
 111       return "noperspective";
 112    else
 113       return NULL;
 114 }
 115
 116 bool
 117 ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 118                                     _mesa_glsl_parse_state *state,
 119                                     const ast_type_qualifier &q)
 120 {
 121    ast_type_qualifier ubo_mat_mask;
 122    ubo_mat_mask.flags.i = 0;
 123    ubo_mat_mask.flags.q.row_major = 1;
 124    ubo_mat_mask.flags.q.column_major = 1;
 125
 126    ast_type_qualifier ubo_layout_mask;
 127    ubo_layout_mask.flags.i = 0;
 128    ubo_layout_mask.flags.q.std140 = 1;
 129    ubo_layout_mask.flags.q.packed = 1;
 130    ubo_layout_mask.flags.q.shared = 1;
 131    ubo_layout_mask.flags.q.std430 = 1;
 132
 133    ast_type_qualifier ubo_binding_mask;
 134    ubo_binding_mask.flags.i = 0;
 135    ubo_binding_mask.flags.q.explicit_binding = 1;
 136    ubo_binding_mask.flags.q.explicit_offset = 1;
 137
 138    ast_type_qualifier stream_layout_mask;
 139    stream_layout_mask.flags.i = 0;
 140    stream_layout_mask.flags.q.stream = 1;
 141
 142    /* Uniform block layout qualifiers get to overwrite each
 143     * other (rightmost having priority), while all other
 144     * qualifiers currently don't allow duplicates.
 145     */
 146    ast_type_qualifier allowed_duplicates_mask;
 147    allowed_duplicates_mask.flags.i =
 148       ubo_mat_mask.flags.i |
 149       ubo_layout_mask.flags.i |
 150       ubo_binding_mask.flags.i;
 151
 152    /* Geometry shaders can have several layout qualifiers
 153     * assigning different stream values.
 154     */
 155    if (state->stage == MESA_SHADER_GEOMETRY)
 156       allowed_duplicates_mask.flags.i |=
 157          stream_layout_mask.flags.i;
 158
 159    if ((this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 160       _mesa_glsl_error(loc, state,
 161                        "duplicate layout qualifiers used");
 162       return false;
 163    }
 164
 165    if (q.flags.q.prim_type) {
 166       if (this->flags.q.prim_type && this->prim_type != q.prim_type) {
 167          _mesa_glsl_error(loc, state,
 168                           "conflicting primitive type qualifiers used");
 169          return false;
 170       }
 171       this->prim_type = q.prim_type;
 172    }
 173
 174    if (q.flags.q.max_vertices) {
 175       if (this->max_vertices) {
 176          this->max_vertices->merge_qualifier(q.max_vertices);
 177       } else {
 178          this->max_vertices = q.max_vertices;
 179       }
 180    }
 181
 182    if (q.flags.q.subroutine_def) {
 183       if (this->flags.q.subroutine_def) {
 184          _mesa_glsl_error(loc, state,
 185                           "conflicting subroutine qualifiers used");
 186       } else {
 187          this->subroutine_list = q.subroutine_list;
 188       }
 189    }
 190
 191    if (q.flags.q.invocations) {
 192       if (this->invocations) {
 193          this->invocations->merge_qualifier(q.invocations);
 194       } else {
 195          this->invocations = q.invocations;
 196       }
 197    }
 198
 199    if (state->stage == MESA_SHADER_GEOMETRY &&
 200        state->has_explicit_attrib_stream()) {
 201       if (!this->flags.q.explicit_stream) {
 202          if (q.flags.q.stream) {
 203             this->flags.q.stream = 1;
 204             this->stream = q.stream;
 205          } else if (!this->flags.q.stream && this->flags.q.out) {
 206             /* Assign default global stream value */
 207             this->flags.q.stream = 1;
 208             this->stream = state->out_qualifier->stream;
 209          }
 210       } else {
 211          if (q.flags.q.explicit_stream) {
 212             _mesa_glsl_error(loc, state,
 213                              "duplicate layout `stream' qualifier");
 214          }
 215       }
 216    }
 217
 218    if (q.flags.q.vertices) {
 219       if (this->vertices) {
 220          this->vertices->merge_qualifier(q.vertices);
 221       } else {
 222          this->vertices = q.vertices;
 223       }
 224    }
 225
 226    if (q.flags.q.vertex_spacing) {
 227       if (this->flags.q.vertex_spacing && this->vertex_spacing != q.vertex_spacing) {
 228          _mesa_glsl_error(loc, state,
 229                           "conflicting vertex spacing used");
 230          return false;
 231       }
 232       this->vertex_spacing = q.vertex_spacing;
 233    }
 234
 235    if (q.flags.q.ordering) {
 236       if (this->flags.q.ordering && this->ordering != q.ordering) {
 237          _mesa_glsl_error(loc, state,
 238                           "conflicting ordering used");
 239          return false;
 240       }
 241       this->ordering = q.ordering;
 242    }
 243
 244    if (q.flags.q.point_mode) {
 245       if (this->flags.q.point_mode && this->point_mode != q.point_mode) {
 246          _mesa_glsl_error(loc, state,
 247                           "conflicting point mode used");
 248          return false;
 249       }
 250       this->point_mode = q.point_mode;
 251    }
 252
 253    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 254       this->flags.i &= ~ubo_mat_mask.flags.i;
 255    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 256       this->flags.i &= ~ubo_layout_mask.flags.i;
 257
 258    for (int i = 0; i < 3; i++) {
 259       if (q.flags.q.local_size & (1 << i)) {
 260          if (this->local_size[i]) {
 261             this->local_size[i]->merge_qualifier(q.local_size[i]);
 262          } else {
 263             this->local_size[i] = q.local_size[i];
 264          }
 265       }
 266    }
 267
 268    this->flags.i |= q.flags.i;
 269
 270    if (q.flags.q.explicit_location)
 271       this->location = q.location;
 272
 273    if (q.flags.q.explicit_index)
 274       this->index = q.index;
 275
 276    if (q.flags.q.explicit_binding)
 277       this->binding = q.binding;
 278
 279    if (q.flags.q.explicit_offset)
 280       this->offset = q.offset;
 281
 282    if (q.precision != ast_precision_none)
 283       this->precision = q.precision;
 284
 285    if (q.flags.q.explicit_image_format) {
 286       this->image_format = q.image_format;
 287       this->image_base_type = q.image_base_type;
 288    }
 289
 290    return true;
 291 }
 292
 293 bool
 294 ast_type_qualifier::merge_out_qualifier(YYLTYPE *loc,
 295                                         _mesa_glsl_parse_state *state,
 296                                         const ast_type_qualifier &q,
 297                                         ast_node* &node)
 298 {
 299    void *mem_ctx = state;
 300    const bool r = this->merge_qualifier(loc, state, q);
 301
 302    if (state->stage == MESA_SHADER_TESS_CTRL) {
 303       node = new(mem_ctx) ast_tcs_output_layout(*loc);
 304    }
 305
 306    return r;
 307 }
 308
 309 bool
 310 ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
 311                                        _mesa_glsl_parse_state *state,
 312                                        const ast_type_qualifier &q,
 313                                        ast_node* &node)
 314 {
 315    void *mem_ctx = state;
 316    bool create_gs_ast = false;
 317    bool create_cs_ast = false;
 318    ast_type_qualifier valid_in_mask;
 319    valid_in_mask.flags.i = 0;
 320
 321    switch (state->stage) {
 322    case MESA_SHADER_TESS_EVAL:
 323       if (q.flags.q.prim_type) {
 324          /* Make sure this is a valid input primitive type. */
 325          switch (q.prim_type) {
 326          case GL_TRIANGLES:
 327          case GL_QUADS:
 328          case GL_ISOLINES:
 329             break;
 330          default:
 331             _mesa_glsl_error(loc, state,
 332                              "invalid tessellation evaluation "
 333                              "shader input primitive type");
 334             break;
 335          }
 336       }
 337
 338       valid_in_mask.flags.q.prim_type = 1;
 339       valid_in_mask.flags.q.vertex_spacing = 1;
 340       valid_in_mask.flags.q.ordering = 1;
 341       valid_in_mask.flags.q.point_mode = 1;
 342       break;
 343    case MESA_SHADER_GEOMETRY:
 344       if (q.flags.q.prim_type) {
 345          /* Make sure this is a valid input primitive type. */
 346          switch (q.prim_type) {
 347          case GL_POINTS:
 348          case GL_LINES:
 349          case GL_LINES_ADJACENCY:
 350          case GL_TRIANGLES:
 351          case GL_TRIANGLES_ADJACENCY:
 352             break;
 353          default:
 354             _mesa_glsl_error(loc, state,
 355                              "invalid geometry shader input primitive type");
 356             break;
 357          }
 358       }
 359
 360       create_gs_ast |=
 361          q.flags.q.prim_type &&
 362          !state->in_qualifier->flags.q.prim_type;
 363
 364       valid_in_mask.flags.q.prim_type = 1;
 365       valid_in_mask.flags.q.invocations = 1;
 366       break;
 367    case MESA_SHADER_FRAGMENT:
 368       valid_in_mask.flags.q.early_fragment_tests = 1;
 369       break;
 370    case MESA_SHADER_COMPUTE:
 371       create_cs_ast |=
 372          q.flags.q.local_size != 0 &&
 373          state->in_qualifier->flags.q.local_size == 0;
 374
 375       valid_in_mask.flags.q.local_size = 7;
 376       break;
 377    default:
 378       _mesa_glsl_error(loc, state,
 379                        "input layout qualifiers only valid in "
 380                        "geometry, fragment and compute shaders");
 381       break;
 382    }
 383
 384    /* Generate an error when invalid input layout qualifiers are used. */
 385    if ((q.flags.i & ~valid_in_mask.flags.i) != 0) {
 386       _mesa_glsl_error(loc, state,
 387                        "invalid input layout qualifiers used");
 388       return false;
 389    }
 390
 391    /* Input layout qualifiers can be specified multiple
 392     * times in separate declarations, as long as they match.
 393     */
 394    if (this->flags.q.prim_type) {
 395       if (q.flags.q.prim_type &&
 396           this->prim_type != q.prim_type) {
 397          _mesa_glsl_error(loc, state,
 398                           "conflicting input primitive %s specified",
 399                           state->stage == MESA_SHADER_GEOMETRY ?
 400                           "type" : "mode");
 401       }
 402    } else if (q.flags.q.prim_type) {
 403       state->in_qualifier->flags.q.prim_type = 1;
 404       state->in_qualifier->prim_type = q.prim_type;
 405    }
 406
 407    if (q.flags.q.invocations) {
 408       this->flags.q.invocations = 1;
 409       if (this->invocations) {
 410          this->invocations->merge_qualifier(q.invocations);
 411       } else {
 412          this->invocations = q.invocations;
 413       }
 414    }
 415
 416    if (q.flags.q.early_fragment_tests) {
 417       state->fs_early_fragment_tests = true;
 418    }
 419
 420    if (this->flags.q.vertex_spacing) {
 421       if (q.flags.q.vertex_spacing &&
 422           this->vertex_spacing != q.vertex_spacing) {
 423          _mesa_glsl_error(loc, state,
 424                           "conflicting vertex spacing specified");
 425       }
 426    } else if (q.flags.q.vertex_spacing) {
 427       this->flags.q.vertex_spacing = 1;
 428       this->vertex_spacing = q.vertex_spacing;
 429    }
 430
 431    if (this->flags.q.ordering) {
 432       if (q.flags.q.ordering &&
 433           this->ordering != q.ordering) {
 434          _mesa_glsl_error(loc, state,
 435                           "conflicting ordering specified");
 436       }
 437    } else if (q.flags.q.ordering) {
 438       this->flags.q.ordering = 1;
 439       this->ordering = q.ordering;
 440    }
 441
 442    if (this->flags.q.point_mode) {
 443       if (q.flags.q.point_mode &&
 444           this->point_mode != q.point_mode) {
 445          _mesa_glsl_error(loc, state,
 446                           "conflicting point mode specified");
 447       }
 448    } else if (q.flags.q.point_mode) {
 449       this->flags.q.point_mode = 1;
 450       this->point_mode = q.point_mode;
 451    }
 452
 453    if (create_gs_ast) {
 454       node = new(mem_ctx) ast_gs_input_layout(*loc, q.prim_type);
 455    } else if (create_cs_ast) {
 456       node = new(mem_ctx) ast_cs_input_layout(*loc, q.local_size);
 457    }
 458
 459    return true;
 460 }
 461
 462 bool
 463 ast_layout_expression::process_qualifier_constant(struct _mesa_glsl_parse_state *state,
 464                                                   const char *qual_indentifier,
 465                                                   unsigned *value,
 466                                                   bool can_be_zero)
 467 {
 468    int min_value = 0;
 469    bool first_pass = true;
 470    *value = 0;
 471
 472    if (!can_be_zero)
 473       min_value = 1;
 474
 475    for (exec_node *node = layout_const_expressions.head;
 476            !node->is_tail_sentinel(); node = node->next) {
 477
 478       exec_list dummy_instructions;
 479       ast_node *const_expression = exec_node_data(ast_node, node, link);
 480
 481       ir_rvalue *const ir = const_expression->hir(&dummy_instructions, state);
 482
 483       ir_constant *const const_int = ir->constant_expression_value();
 484       if (const_int == NULL || !const_int->type->is_integer()) {
 485          YYLTYPE loc = const_expression->get_location();
 486          _mesa_glsl_error(&loc, state, "%s must be an integral constant "
 487                           "expression", qual_indentifier);
 488          return false;
 489       }
 490
 491       if (const_int->value.i[0] < min_value) {
 492          YYLTYPE loc = const_expression->get_location();
 493          _mesa_glsl_error(&loc, state, "%s layout qualifier is invalid "
 494                           "(%d < %d)", qual_indentifier,
 495                           const_int->value.i[0], min_value);
 496          return false;
 497       }
 498
 499       if (!first_pass && *value != const_int->value.u[0]) {
 500          YYLTYPE loc = const_expression->get_location();
 501          _mesa_glsl_error(&loc, state, "%s layout qualifier does not "
 502                           "match previous declaration (%d vs %d)",
 503                           qual_indentifier, *value, const_int->value.i[0]);
 504          return false;
 505       } else {
 506          first_pass = false;
 507          *value = const_int->value.u[0];
 508       }
 509
 510       /* If the location is const (and we've verified that
 511        * it is) then no instructions should have been emitted
 512        * when we converted it to HIR. If they were emitted,
 513        * then either the location isn't const after all, or
 514        * we are emitting unnecessary instructions.
 515        */
 516       assert(dummy_instructions.is_empty());
 517    }
 518
 519    return true;
 520 }