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