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    return this->qualifier.flags.i != 0;
  44 }
  45
  46 bool ast_type_qualifier::has_interpolation() const
  47 {
  48    return this->flags.q.smooth
  49           || this->flags.q.flat
  50           || this->flags.q.noperspective;
  51 }
  52
  53 bool
  54 ast_type_qualifier::has_layout() const
  55 {
  56    return this->flags.q.origin_upper_left
  57           || this->flags.q.pixel_center_integer
  58           || this->flags.q.depth_any
  59           || this->flags.q.depth_greater
  60           || this->flags.q.depth_less
  61           || this->flags.q.depth_unchanged
  62           || this->flags.q.std140
  63           || this->flags.q.shared
  64           || this->flags.q.column_major
  65           || this->flags.q.row_major
  66           || this->flags.q.packed
  67           || this->flags.q.explicit_location
  68           || this->flags.q.explicit_index
  69           || this->flags.q.explicit_binding
  70           || this->flags.q.explicit_offset;
  71 }
  72
  73 bool
  74 ast_type_qualifier::has_storage() const
  75 {
  76    return this->flags.q.constant
  77           || this->flags.q.attribute
  78           || this->flags.q.varying
  79           || this->flags.q.in
  80           || this->flags.q.out
  81           || this->flags.q.uniform;
  82 }
  83
  84 bool
  85 ast_type_qualifier::has_auxiliary_storage() const
  86 {
  87    return this->flags.q.centroid
  88           || this->flags.q.sample;
  89 }
  90
  91 const char*
  92 ast_type_qualifier::interpolation_string() const
  93 {
  94    if (this->flags.q.smooth)
  95       return "smooth";
  96    else if (this->flags.q.flat)
  97       return "flat";
  98    else if (this->flags.q.noperspective)
  99       return "noperspective";
 100    else
 101       return NULL;
 102 }
 103
 104 bool
 105 ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 106                                     _mesa_glsl_parse_state *state,
 107                                     ast_type_qualifier q)
 108 {
 109    ast_type_qualifier ubo_mat_mask;
 110    ubo_mat_mask.flags.i = 0;
 111    ubo_mat_mask.flags.q.row_major = 1;
 112    ubo_mat_mask.flags.q.column_major = 1;
 113
 114    ast_type_qualifier ubo_layout_mask;
 115    ubo_layout_mask.flags.i = 0;
 116    ubo_layout_mask.flags.q.std140 = 1;
 117    ubo_layout_mask.flags.q.packed = 1;
 118    ubo_layout_mask.flags.q.shared = 1;
 119
 120    ast_type_qualifier ubo_binding_mask;
 121    ubo_binding_mask.flags.i = 0;
 122    ubo_binding_mask.flags.q.explicit_binding = 1;
 123    ubo_binding_mask.flags.q.explicit_offset = 1;
 124
 125    ast_type_qualifier stream_layout_mask;
 126    stream_layout_mask.flags.i = 0;
 127    stream_layout_mask.flags.q.stream = 1;
 128
 129    /* Uniform block layout qualifiers get to overwrite each
 130     * other (rightmost having priority), while all other
 131     * qualifiers currently don't allow duplicates.
 132     */
 133    ast_type_qualifier allowed_duplicates_mask;
 134    allowed_duplicates_mask.flags.i =
 135       ubo_mat_mask.flags.i |
 136       ubo_layout_mask.flags.i |
 137       ubo_binding_mask.flags.i;
 138
 139    /* Geometry shaders can have several layout qualifiers
 140     * assigning different stream values.
 141     */
 142    if (state->stage == MESA_SHADER_GEOMETRY)
 143       allowed_duplicates_mask.flags.i |=
 144          stream_layout_mask.flags.i;
 145
 146    if ((this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 147       _mesa_glsl_error(loc, state,
 148                        "duplicate layout qualifiers used");
 149       return false;
 150    }
 151
 152    if (q.flags.q.prim_type) {
 153       if (this->flags.q.prim_type && this->prim_type != q.prim_type) {
 154          _mesa_glsl_error(loc, state,
 155                           "conflicting primitive type qualifiers used");
 156          return false;
 157       }
 158       this->prim_type = q.prim_type;
 159    }
 160
 161    if (q.flags.q.max_vertices) {
 162       if (this->flags.q.max_vertices && this->max_vertices != q.max_vertices) {
 163          _mesa_glsl_error(loc, state,
 164                           "geometry shader set conflicting max_vertices "
 165                           "(%d and %d)", this->max_vertices, q.max_vertices);
 166          return false;
 167       }
 168       this->max_vertices = q.max_vertices;
 169    }
 170
 171    if (state->stage == MESA_SHADER_GEOMETRY &&
 172        state->has_explicit_attrib_stream()) {
 173       if (q.flags.q.stream && q.stream >= state->ctx->Const.MaxVertexStreams) {
 174          _mesa_glsl_error(loc, state,
 175                           "`stream' value is larger than MAX_VERTEX_STREAMS - 1 "
 176                           "(%d > %d)",
 177                           q.stream, state->ctx->Const.MaxVertexStreams - 1);
 178       }
 179       if (this->flags.q.explicit_stream &&
 180           this->stream >= state->ctx->Const.MaxVertexStreams) {
 181          _mesa_glsl_error(loc, state,
 182                           "`stream' value is larger than MAX_VERTEX_STREAMS - 1 "
 183                           "(%d > %d)",
 184                           this->stream, state->ctx->Const.MaxVertexStreams - 1);
 185       }
 186
 187       if (!this->flags.q.explicit_stream) {
 188          if (q.flags.q.stream) {
 189             this->flags.q.stream = 1;
 190             this->stream = q.stream;
 191          } else if (!this->flags.q.stream && this->flags.q.out) {
 192             /* Assign default global stream value */
 193             this->flags.q.stream = 1;
 194             this->stream = state->out_qualifier->stream;
 195          }
 196       } else {
 197          if (q.flags.q.explicit_stream) {
 198             _mesa_glsl_error(loc, state,
 199                              "duplicate layout `stream' qualifier");
 200          }
 201       }
 202    }
 203
 204    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 205       this->flags.i &= ~ubo_mat_mask.flags.i;
 206    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 207       this->flags.i &= ~ubo_layout_mask.flags.i;
 208
 209    for (int i = 0; i < 3; i++) {
 210       if (q.flags.q.local_size & (1 << i)) {
 211          if ((this->flags.q.local_size & (1 << i)) &&
 212              this->local_size[i] != q.local_size[i]) {
 213             _mesa_glsl_error(loc, state,
 214                              "compute shader set conflicting values for "
 215                              "local_size_%c (%d and %d)", 'x' + i,
 216                              this->local_size[i], q.local_size[i]);
 217             return false;
 218          }
 219          this->local_size[i] = q.local_size[i];
 220       }
 221    }
 222
 223    this->flags.i |= q.flags.i;
 224
 225    if (q.flags.q.explicit_location)
 226       this->location = q.location;
 227
 228    if (q.flags.q.explicit_index)
 229       this->index = q.index;
 230
 231    if (q.flags.q.explicit_binding)
 232       this->binding = q.binding;
 233
 234    if (q.flags.q.explicit_offset)
 235       this->offset = q.offset;
 236
 237    if (q.precision != ast_precision_none)
 238       this->precision = q.precision;
 239
 240    if (q.flags.q.explicit_image_format) {
 241       this->image_format = q.image_format;
 242       this->image_base_type = q.image_base_type;
 243    }
 244
 245    return true;
 246 }
 247
 248 bool
 249 ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
 250                                        _mesa_glsl_parse_state *state,
 251                                        ast_type_qualifier q,
 252                                        ast_node* &node)
 253 {
 254    void *mem_ctx = state;
 255    bool create_gs_ast = false;
 256    bool create_cs_ast = false;
 257    ast_type_qualifier valid_in_mask;
 258    valid_in_mask.flags.i = 0;
 259
 260    switch (state->stage) {
 261    case MESA_SHADER_GEOMETRY:
 262       if (q.flags.q.prim_type) {
 263          /* Make sure this is a valid input primitive type. */
 264          switch (q.prim_type) {
 265          case GL_POINTS:
 266          case GL_LINES:
 267          case GL_LINES_ADJACENCY:
 268          case GL_TRIANGLES:
 269          case GL_TRIANGLES_ADJACENCY:
 270             break;
 271          default:
 272             _mesa_glsl_error(loc, state,
 273                              "invalid geometry shader input primitive type");
 274             break;
 275          }
 276       }
 277
 278       create_gs_ast |=
 279          q.flags.q.prim_type &&
 280          !state->in_qualifier->flags.q.prim_type;
 281
 282       valid_in_mask.flags.q.prim_type = 1;
 283       valid_in_mask.flags.q.invocations = 1;
 284       break;
 285    case MESA_SHADER_FRAGMENT:
 286       if (q.flags.q.early_fragment_tests) {
 287          state->early_fragment_tests = true;
 288       } else {
 289          _mesa_glsl_error(loc, state, "invalid input layout qualifier");
 290       }
 291       break;
 292    case MESA_SHADER_COMPUTE:
 293       create_cs_ast |=
 294          q.flags.q.local_size != 0 &&
 295          state->in_qualifier->flags.q.local_size == 0;
 296
 297       valid_in_mask.flags.q.local_size = 7;
 298       break;
 299    default:
 300       _mesa_glsl_error(loc, state,
 301                        "input layout qualifiers only valid in "
 302                        "geometry, fragment and compute shaders");
 303       break;
 304    }
 305
 306    /* Generate an error when invalid input layout qualifiers are used. */
 307    if ((q.flags.i & ~valid_in_mask.flags.i) != 0) {
 308       _mesa_glsl_error(loc, state,
 309                        "invalid input layout qualifiers used");
 310       return false;
 311    }
 312
 313    /* Input layout qualifiers can be specified multiple
 314     * times in separate declarations, as long as they match.
 315     */
 316    if (this->flags.q.prim_type) {
 317       if (q.flags.q.prim_type &&
 318           this->prim_type != q.prim_type) {
 319          _mesa_glsl_error(loc, state,
 320                           "conflicting input primitive types specified");
 321       }
 322    } else if (q.flags.q.prim_type) {
 323       state->in_qualifier->flags.q.prim_type = 1;
 324       state->in_qualifier->prim_type = q.prim_type;
 325    }
 326
 327    if (this->flags.q.invocations &&
 328        q.flags.q.invocations &&
 329        this->invocations != q.invocations) {
 330       _mesa_glsl_error(loc, state,
 331                        "conflicting invocations counts specified");
 332       return false;
 333    } else if (q.flags.q.invocations) {
 334       this->flags.q.invocations = 1;
 335       this->invocations = q.invocations;
 336    }
 337
 338    if (create_gs_ast) {
 339       node = new(mem_ctx) ast_gs_input_layout(*loc, q.prim_type);
 340    } else if (create_cs_ast) {
 341       /* Infer a local_size of 1 for every unspecified dimension */
 342       unsigned local_size[3];
 343       for (int i = 0; i < 3; i++) {
 344          if (q.flags.q.local_size & (1 << i))
 345             local_size[i] = q.local_size[i];
 346          else
 347             local_size[i] = 1;
 348       }
 349       node = new(mem_ctx) ast_cs_input_layout(*loc, local_size);
 350    }
 351
 352    return true;
 353 }