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() 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    return (this->qualifier.flags.i & ~subroutine_only.flags.i) != 0;
  49 }
  50
  51 bool ast_type_qualifier::has_interpolation() const
  52 {
  53    return this->flags.q.smooth
  54           || this->flags.q.flat
  55           || this->flags.q.noperspective;
  56 }
  57
  58 bool
  59 ast_type_qualifier::has_layout() const
  60 {
  61    return this->flags.q.origin_upper_left
  62           || this->flags.q.pixel_center_integer
  63           || this->flags.q.depth_any
  64           || this->flags.q.depth_greater
  65           || this->flags.q.depth_less
  66           || this->flags.q.depth_unchanged
  67           || this->flags.q.std140
  68           || this->flags.q.std430
  69           || this->flags.q.shared
  70           || this->flags.q.column_major
  71           || this->flags.q.row_major
  72           || this->flags.q.packed
  73           || this->flags.q.explicit_location
  74           || this->flags.q.explicit_index
  75           || this->flags.q.explicit_binding
  76           || this->flags.q.explicit_offset;
  77 }
  78
  79 bool
  80 ast_type_qualifier::has_storage() const
  81 {
  82    return this->flags.q.constant
  83           || this->flags.q.attribute
  84           || this->flags.q.varying
  85           || this->flags.q.in
  86           || this->flags.q.out
  87           || this->flags.q.uniform
  88           || this->flags.q.buffer;
  89 }
  90
  91 bool
  92 ast_type_qualifier::has_auxiliary_storage() const
  93 {
  94    return this->flags.q.centroid
  95           || this->flags.q.sample
  96           || this->flags.q.patch;
  97 }
  98
  99 const char*
 100 ast_type_qualifier::interpolation_string() const
 101 {
 102    if (this->flags.q.smooth)
 103       return "smooth";
 104    else if (this->flags.q.flat)
 105       return "flat";
 106    else if (this->flags.q.noperspective)
 107       return "noperspective";
 108    else
 109       return NULL;
 110 }
 111
 112 bool
 113 ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 114                                     _mesa_glsl_parse_state *state,
 115                                     ast_type_qualifier q)
 116 {
 117    ast_type_qualifier ubo_mat_mask;
 118    ubo_mat_mask.flags.i = 0;
 119    ubo_mat_mask.flags.q.row_major = 1;
 120    ubo_mat_mask.flags.q.column_major = 1;
 121
 122    ast_type_qualifier ubo_layout_mask;
 123    ubo_layout_mask.flags.i = 0;
 124    ubo_layout_mask.flags.q.std140 = 1;
 125    ubo_layout_mask.flags.q.packed = 1;
 126    ubo_layout_mask.flags.q.shared = 1;
 127    ubo_layout_mask.flags.q.std430 = 1;
 128
 129    ast_type_qualifier ubo_binding_mask;
 130    ubo_binding_mask.flags.i = 0;
 131    ubo_binding_mask.flags.q.explicit_binding = 1;
 132    ubo_binding_mask.flags.q.explicit_offset = 1;
 133
 134    ast_type_qualifier stream_layout_mask;
 135    stream_layout_mask.flags.i = 0;
 136    stream_layout_mask.flags.q.stream = 1;
 137
 138    /* Uniform block layout qualifiers get to overwrite each
 139     * other (rightmost having priority), while all other
 140     * qualifiers currently don't allow duplicates.
 141     */
 142    ast_type_qualifier allowed_duplicates_mask;
 143    allowed_duplicates_mask.flags.i =
 144       ubo_mat_mask.flags.i |
 145       ubo_layout_mask.flags.i |
 146       ubo_binding_mask.flags.i;
 147
 148    /* Geometry shaders can have several layout qualifiers
 149     * assigning different stream values.
 150     */
 151    if (state->stage == MESA_SHADER_GEOMETRY)
 152       allowed_duplicates_mask.flags.i |=
 153          stream_layout_mask.flags.i;
 154
 155    if ((this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 156       _mesa_glsl_error(loc, state,
 157                        "duplicate layout qualifiers used");
 158       return false;
 159    }
 160
 161    if (q.flags.q.prim_type) {
 162       if (this->flags.q.prim_type && this->prim_type != q.prim_type) {
 163          _mesa_glsl_error(loc, state,
 164                           "conflicting primitive type qualifiers used");
 165          return false;
 166       }
 167       this->prim_type = q.prim_type;
 168    }
 169
 170    if (q.flags.q.max_vertices) {
 171       if (this->flags.q.max_vertices && this->max_vertices != q.max_vertices) {
 172          _mesa_glsl_error(loc, state,
 173                           "geometry shader set conflicting max_vertices "
 174                           "(%d and %d)", this->max_vertices, q.max_vertices);
 175          return false;
 176       }
 177       this->max_vertices = q.max_vertices;
 178    }
 179
 180    if (q.flags.q.invocations) {
 181       if (this->flags.q.invocations && this->invocations != q.invocations) {
 182          _mesa_glsl_error(loc, state,
 183                           "geometry shader set conflicting invocations "
 184                           "(%d and %d)", this->invocations, q.invocations);
 185          return false;
 186       }
 187       this->invocations = q.invocations;
 188    }
 189
 190    if (state->stage == MESA_SHADER_GEOMETRY &&
 191        state->has_explicit_attrib_stream()) {
 192       if (q.flags.q.stream && q.stream >= state->ctx->Const.MaxVertexStreams) {
 193          _mesa_glsl_error(loc, state,
 194                           "`stream' value is larger than MAX_VERTEX_STREAMS - 1 "
 195                           "(%d > %d)",
 196                           q.stream, state->ctx->Const.MaxVertexStreams - 1);
 197       }
 198       if (this->flags.q.explicit_stream &&
 199           this->stream >= state->ctx->Const.MaxVertexStreams) {
 200          _mesa_glsl_error(loc, state,
 201                           "`stream' value is larger than MAX_VERTEX_STREAMS - 1 "
 202                           "(%d > %d)",
 203                           this->stream, state->ctx->Const.MaxVertexStreams - 1);
 204       }
 205
 206       if (!this->flags.q.explicit_stream) {
 207          if (q.flags.q.stream) {
 208             this->flags.q.stream = 1;
 209             this->stream = q.stream;
 210          } else if (!this->flags.q.stream && this->flags.q.out) {
 211             /* Assign default global stream value */
 212             this->flags.q.stream = 1;
 213             this->stream = state->out_qualifier->stream;
 214          }
 215       } else {
 216          if (q.flags.q.explicit_stream) {
 217             _mesa_glsl_error(loc, state,
 218                              "duplicate layout `stream' qualifier");
 219          }
 220       }
 221    }
 222
 223    if (q.flags.q.vertices) {
 224       if (this->flags.q.vertices && this->vertices != q.vertices) {
 225          _mesa_glsl_error(loc, state,
 226                           "tessellation control shader set conflicting "
 227                           "vertices (%d and %d)",
 228                           this->vertices, q.vertices);
 229          return false;
 230       }
 231       this->vertices = q.vertices;
 232    }
 233
 234    if (q.flags.q.vertex_spacing) {
 235       if (this->flags.q.vertex_spacing && this->vertex_spacing != q.vertex_spacing) {
 236          _mesa_glsl_error(loc, state,
 237                           "conflicting vertex spacing used");
 238          return false;
 239       }
 240       this->vertex_spacing = q.vertex_spacing;
 241    }
 242
 243    if (q.flags.q.ordering) {
 244       if (this->flags.q.ordering && this->ordering != q.ordering) {
 245          _mesa_glsl_error(loc, state,
 246                           "conflicting ordering used");
 247          return false;
 248       }
 249       this->ordering = q.ordering;
 250    }
 251
 252    if (q.flags.q.point_mode) {
 253       if (this->flags.q.point_mode && this->point_mode != q.point_mode) {
 254          _mesa_glsl_error(loc, state,
 255                           "conflicting point mode used");
 256          return false;
 257       }
 258       this->point_mode = q.point_mode;
 259    }
 260
 261    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 262       this->flags.i &= ~ubo_mat_mask.flags.i;
 263    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 264       this->flags.i &= ~ubo_layout_mask.flags.i;
 265
 266    for (int i = 0; i < 3; i++) {
 267       if (q.flags.q.local_size & (1 << i)) {
 268          if ((this->flags.q.local_size & (1 << i)) &&
 269              this->local_size[i] != q.local_size[i]) {
 270             _mesa_glsl_error(loc, state,
 271                              "compute shader set conflicting values for "
 272                              "local_size_%c (%d and %d)", 'x' + i,
 273                              this->local_size[i], q.local_size[i]);
 274             return false;
 275          }
 276          this->local_size[i] = q.local_size[i];
 277       }
 278    }
 279
 280    this->flags.i |= q.flags.i;
 281
 282    if (q.flags.q.explicit_location)
 283       this->location = q.location;
 284
 285    if (q.flags.q.explicit_index)
 286       this->index = q.index;
 287
 288    if (q.flags.q.explicit_binding)
 289       this->binding = q.binding;
 290
 291    if (q.flags.q.explicit_offset)
 292       this->offset = q.offset;
 293
 294    if (q.precision != ast_precision_none)
 295       this->precision = q.precision;
 296
 297    if (q.flags.q.explicit_image_format) {
 298       this->image_format = q.image_format;
 299       this->image_base_type = q.image_base_type;
 300    }
 301
 302    return true;
 303 }
 304
 305 bool
 306 ast_type_qualifier::merge_out_qualifier(YYLTYPE *loc,
 307                                         _mesa_glsl_parse_state *state,
 308                                         ast_type_qualifier q,
 309                                         ast_node* &node)
 310 {
 311    void *mem_ctx = state;
 312    const bool r = this->merge_qualifier(loc, state, q);
 313
 314    if (state->stage == MESA_SHADER_TESS_CTRL) {
 315       node = new(mem_ctx) ast_tcs_output_layout(*loc, q.vertices);
 316    }
 317
 318    return r;
 319 }
 320
 321 bool
 322 ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
 323                                        _mesa_glsl_parse_state *state,
 324                                        ast_type_qualifier q,
 325                                        ast_node* &node)
 326 {
 327    void *mem_ctx = state;
 328    bool create_gs_ast = false;
 329    bool create_cs_ast = false;
 330    ast_type_qualifier valid_in_mask;
 331    valid_in_mask.flags.i = 0;
 332
 333    switch (state->stage) {
 334    case MESA_SHADER_TESS_EVAL:
 335       if (q.flags.q.prim_type) {
 336          /* Make sure this is a valid input primitive type. */
 337          switch (q.prim_type) {
 338          case GL_TRIANGLES:
 339          case GL_QUADS:
 340          case GL_ISOLINES:
 341             break;
 342          default:
 343             _mesa_glsl_error(loc, state,
 344                              "invalid tessellation evaluation "
 345                              "shader input primitive type");
 346             break;
 347          }
 348       }
 349
 350       valid_in_mask.flags.q.prim_type = 1;
 351       valid_in_mask.flags.q.vertex_spacing = 1;
 352       valid_in_mask.flags.q.ordering = 1;
 353       valid_in_mask.flags.q.point_mode = 1;
 354       break;
 355    case MESA_SHADER_GEOMETRY:
 356       if (q.flags.q.prim_type) {
 357          /* Make sure this is a valid input primitive type. */
 358          switch (q.prim_type) {
 359          case GL_POINTS:
 360          case GL_LINES:
 361          case GL_LINES_ADJACENCY:
 362          case GL_TRIANGLES:
 363          case GL_TRIANGLES_ADJACENCY:
 364             break;
 365          default:
 366             _mesa_glsl_error(loc, state,
 367                              "invalid geometry shader input primitive type");
 368             break;
 369          }
 370       }
 371
 372       create_gs_ast |=
 373          q.flags.q.prim_type &&
 374          !state->in_qualifier->flags.q.prim_type;
 375
 376       valid_in_mask.flags.q.prim_type = 1;
 377       valid_in_mask.flags.q.invocations = 1;
 378       break;
 379    case MESA_SHADER_FRAGMENT:
 380       valid_in_mask.flags.q.early_fragment_tests = 1;
 381       break;
 382    case MESA_SHADER_COMPUTE:
 383       create_cs_ast |=
 384          q.flags.q.local_size != 0 &&
 385          state->in_qualifier->flags.q.local_size == 0;
 386
 387       valid_in_mask.flags.q.local_size = 7;
 388       break;
 389    default:
 390       _mesa_glsl_error(loc, state,
 391                        "input layout qualifiers only valid in "
 392                        "geometry, fragment and compute shaders");
 393       break;
 394    }
 395
 396    /* Generate an error when invalid input layout qualifiers are used. */
 397    if ((q.flags.i & ~valid_in_mask.flags.i) != 0) {
 398       _mesa_glsl_error(loc, state,
 399                        "invalid input layout qualifiers used");
 400       return false;
 401    }
 402
 403    /* Input layout qualifiers can be specified multiple
 404     * times in separate declarations, as long as they match.
 405     */
 406    if (this->flags.q.prim_type) {
 407       if (q.flags.q.prim_type &&
 408           this->prim_type != q.prim_type) {
 409          _mesa_glsl_error(loc, state,
 410                           "conflicting input primitive %s specified",
 411                           state->stage == MESA_SHADER_GEOMETRY ?
 412                           "type" : "mode");
 413       }
 414    } else if (q.flags.q.prim_type) {
 415       state->in_qualifier->flags.q.prim_type = 1;
 416       state->in_qualifier->prim_type = q.prim_type;
 417    }
 418
 419    if (this->flags.q.invocations &&
 420        q.flags.q.invocations &&
 421        this->invocations != q.invocations) {
 422       _mesa_glsl_error(loc, state,
 423                        "conflicting invocations counts specified");
 424       return false;
 425    } else if (q.flags.q.invocations) {
 426       this->flags.q.invocations = 1;
 427       this->invocations = q.invocations;
 428    }
 429
 430    if (q.flags.q.early_fragment_tests) {
 431       state->fs_early_fragment_tests = true;
 432    }
 433
 434    if (this->flags.q.vertex_spacing) {
 435       if (q.flags.q.vertex_spacing &&
 436           this->vertex_spacing != q.vertex_spacing) {
 437          _mesa_glsl_error(loc, state,
 438                           "conflicting vertex spacing specified");
 439       }
 440    } else if (q.flags.q.vertex_spacing) {
 441       this->flags.q.vertex_spacing = 1;
 442       this->vertex_spacing = q.vertex_spacing;
 443    }
 444
 445    if (this->flags.q.ordering) {
 446       if (q.flags.q.ordering &&
 447           this->ordering != q.ordering) {
 448          _mesa_glsl_error(loc, state,
 449                           "conflicting ordering specified");
 450       }
 451    } else if (q.flags.q.ordering) {
 452       this->flags.q.ordering = 1;
 453       this->ordering = q.ordering;
 454    }
 455
 456    if (this->flags.q.point_mode) {
 457       if (q.flags.q.point_mode &&
 458           this->point_mode != q.point_mode) {
 459          _mesa_glsl_error(loc, state,
 460                           "conflicting point mode specified");
 461       }
 462    } else if (q.flags.q.point_mode) {
 463       this->flags.q.point_mode = 1;
 464       this->point_mode = q.point_mode;
 465    }
 466
 467    if (create_gs_ast) {
 468       node = new(mem_ctx) ast_gs_input_layout(*loc, q.prim_type);
 469    } else if (create_cs_ast) {
 470       /* Infer a local_size of 1 for every unspecified dimension */
 471       unsigned local_size[3];
 472       for (int i = 0; i < 3; i++) {
 473          if (q.flags.q.local_size & (1 << i))
 474             local_size[i] = q.local_size[i];
 475          else
 476             local_size[i] = 1;
 477       }
 478       node = new(mem_ctx) ast_cs_input_layout(*loc, local_size);
 479    }
 480
 481    return true;
 482 }