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