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           || this->flags.q.buffer;
  83 }
  84
  85 bool
  86 ast_type_qualifier::has_auxiliary_storage() const
  87 {
  88    return this->flags.q.centroid
  89           || this->flags.q.sample;
  90 }
  91
  92 const char*
  93 ast_type_qualifier::interpolation_string() const
  94 {
  95    if (this->flags.q.smooth)
  96       return "smooth";
  97    else if (this->flags.q.flat)
  98       return "flat";
  99    else if (this->flags.q.noperspective)
 100       return "noperspective";
 101    else
 102       return NULL;
 103 }
 104
 105 bool
 106 ast_type_qualifier::merge_qualifier(YYLTYPE *loc,
 107                                     _mesa_glsl_parse_state *state,
 108                                     ast_type_qualifier q)
 109 {
 110    ast_type_qualifier ubo_mat_mask;
 111    ubo_mat_mask.flags.i = 0;
 112    ubo_mat_mask.flags.q.row_major = 1;
 113    ubo_mat_mask.flags.q.column_major = 1;
 114
 115    ast_type_qualifier ubo_layout_mask;
 116    ubo_layout_mask.flags.i = 0;
 117    ubo_layout_mask.flags.q.std140 = 1;
 118    ubo_layout_mask.flags.q.packed = 1;
 119    ubo_layout_mask.flags.q.shared = 1;
 120
 121    ast_type_qualifier ubo_binding_mask;
 122    ubo_binding_mask.flags.i = 0;
 123    ubo_binding_mask.flags.q.explicit_binding = 1;
 124    ubo_binding_mask.flags.q.explicit_offset = 1;
 125
 126    ast_type_qualifier stream_layout_mask;
 127    stream_layout_mask.flags.i = 0;
 128    stream_layout_mask.flags.q.stream = 1;
 129
 130    /* Uniform block layout qualifiers get to overwrite each
 131     * other (rightmost having priority), while all other
 132     * qualifiers currently don't allow duplicates.
 133     */
 134    ast_type_qualifier allowed_duplicates_mask;
 135    allowed_duplicates_mask.flags.i =
 136       ubo_mat_mask.flags.i |
 137       ubo_layout_mask.flags.i |
 138       ubo_binding_mask.flags.i;
 139
 140    /* Geometry shaders can have several layout qualifiers
 141     * assigning different stream values.
 142     */
 143    if (state->stage == MESA_SHADER_GEOMETRY)
 144       allowed_duplicates_mask.flags.i |=
 145          stream_layout_mask.flags.i;
 146
 147    if ((this->flags.i & q.flags.i & ~allowed_duplicates_mask.flags.i) != 0) {
 148       _mesa_glsl_error(loc, state,
 149                        "duplicate layout qualifiers used");
 150       return false;
 151    }
 152
 153    if (q.flags.q.prim_type) {
 154       if (this->flags.q.prim_type && this->prim_type != q.prim_type) {
 155          _mesa_glsl_error(loc, state,
 156                           "conflicting primitive type qualifiers used");
 157          return false;
 158       }
 159       this->prim_type = q.prim_type;
 160    }
 161
 162    if (q.flags.q.max_vertices) {
 163       if (this->flags.q.max_vertices && this->max_vertices != q.max_vertices) {
 164          _mesa_glsl_error(loc, state,
 165                           "geometry shader set conflicting max_vertices "
 166                           "(%d and %d)", this->max_vertices, q.max_vertices);
 167          return false;
 168       }
 169       this->max_vertices = q.max_vertices;
 170    }
 171
 172    if (q.flags.q.invocations) {
 173       if (this->flags.q.invocations && this->invocations != q.invocations) {
 174          _mesa_glsl_error(loc, state,
 175                           "geometry shader set conflicting invocations "
 176                           "(%d and %d)", this->invocations, q.invocations);
 177          return false;
 178       }
 179       this->invocations = q.invocations;
 180    }
 181
 182    if (state->stage == MESA_SHADER_GEOMETRY &&
 183        state->has_explicit_attrib_stream()) {
 184       if (q.flags.q.stream && q.stream >= state->ctx->Const.MaxVertexStreams) {
 185          _mesa_glsl_error(loc, state,
 186                           "`stream' value is larger than MAX_VERTEX_STREAMS - 1 "
 187                           "(%d > %d)",
 188                           q.stream, state->ctx->Const.MaxVertexStreams - 1);
 189       }
 190       if (this->flags.q.explicit_stream &&
 191           this->stream >= state->ctx->Const.MaxVertexStreams) {
 192          _mesa_glsl_error(loc, state,
 193                           "`stream' value is larger than MAX_VERTEX_STREAMS - 1 "
 194                           "(%d > %d)",
 195                           this->stream, state->ctx->Const.MaxVertexStreams - 1);
 196       }
 197
 198       if (!this->flags.q.explicit_stream) {
 199          if (q.flags.q.stream) {
 200             this->flags.q.stream = 1;
 201             this->stream = q.stream;
 202          } else if (!this->flags.q.stream && this->flags.q.out) {
 203             /* Assign default global stream value */
 204             this->flags.q.stream = 1;
 205             this->stream = state->out_qualifier->stream;
 206          }
 207       } else {
 208          if (q.flags.q.explicit_stream) {
 209             _mesa_glsl_error(loc, state,
 210                              "duplicate layout `stream' qualifier");
 211          }
 212       }
 213    }
 214
 215    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 216       this->flags.i &= ~ubo_mat_mask.flags.i;
 217    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 218       this->flags.i &= ~ubo_layout_mask.flags.i;
 219
 220    for (int i = 0; i < 3; i++) {
 221       if (q.flags.q.local_size & (1 << i)) {
 222          if ((this->flags.q.local_size & (1 << i)) &&
 223              this->local_size[i] != q.local_size[i]) {
 224             _mesa_glsl_error(loc, state,
 225                              "compute shader set conflicting values for "
 226                              "local_size_%c (%d and %d)", 'x' + i,
 227                              this->local_size[i], q.local_size[i]);
 228             return false;
 229          }
 230          this->local_size[i] = q.local_size[i];
 231       }
 232    }
 233
 234    this->flags.i |= q.flags.i;
 235
 236    if (q.flags.q.explicit_location)
 237       this->location = q.location;
 238
 239    if (q.flags.q.explicit_index)
 240       this->index = q.index;
 241
 242    if (q.flags.q.explicit_binding)
 243       this->binding = q.binding;
 244
 245    if (q.flags.q.explicit_offset)
 246       this->offset = q.offset;
 247
 248    if (q.precision != ast_precision_none)
 249       this->precision = q.precision;
 250
 251    if (q.flags.q.explicit_image_format) {
 252       this->image_format = q.image_format;
 253       this->image_base_type = q.image_base_type;
 254    }
 255
 256    return true;
 257 }
 258
 259 bool
 260 ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
 261                                        _mesa_glsl_parse_state *state,
 262                                        ast_type_qualifier q,
 263                                        ast_node* &node)
 264 {
 265    void *mem_ctx = state;
 266    bool create_gs_ast = false;
 267    bool create_cs_ast = false;
 268    ast_type_qualifier valid_in_mask;
 269    valid_in_mask.flags.i = 0;
 270
 271    switch (state->stage) {
 272    case MESA_SHADER_GEOMETRY:
 273       if (q.flags.q.prim_type) {
 274          /* Make sure this is a valid input primitive type. */
 275          switch (q.prim_type) {
 276          case GL_POINTS:
 277          case GL_LINES:
 278          case GL_LINES_ADJACENCY:
 279          case GL_TRIANGLES:
 280          case GL_TRIANGLES_ADJACENCY:
 281             break;
 282          default:
 283             _mesa_glsl_error(loc, state,
 284                              "invalid geometry shader input primitive type");
 285             break;
 286          }
 287       }
 288
 289       create_gs_ast |=
 290          q.flags.q.prim_type &&
 291          !state->in_qualifier->flags.q.prim_type;
 292
 293       valid_in_mask.flags.q.prim_type = 1;
 294       valid_in_mask.flags.q.invocations = 1;
 295       break;
 296    case MESA_SHADER_FRAGMENT:
 297       valid_in_mask.flags.q.early_fragment_tests = 1;
 298       break;
 299    case MESA_SHADER_COMPUTE:
 300       create_cs_ast |=
 301          q.flags.q.local_size != 0 &&
 302          state->in_qualifier->flags.q.local_size == 0;
 303
 304       valid_in_mask.flags.q.local_size = 7;
 305       break;
 306    default:
 307       _mesa_glsl_error(loc, state,
 308                        "input layout qualifiers only valid in "
 309                        "geometry, fragment and compute shaders");
 310       break;
 311    }
 312
 313    /* Generate an error when invalid input layout qualifiers are used. */
 314    if ((q.flags.i & ~valid_in_mask.flags.i) != 0) {
 315       _mesa_glsl_error(loc, state,
 316                        "invalid input layout qualifiers used");
 317       return false;
 318    }
 319
 320    /* Input layout qualifiers can be specified multiple
 321     * times in separate declarations, as long as they match.
 322     */
 323    if (this->flags.q.prim_type) {
 324       if (q.flags.q.prim_type &&
 325           this->prim_type != q.prim_type) {
 326          _mesa_glsl_error(loc, state,
 327                           "conflicting input primitive types specified");
 328       }
 329    } else if (q.flags.q.prim_type) {
 330       state->in_qualifier->flags.q.prim_type = 1;
 331       state->in_qualifier->prim_type = q.prim_type;
 332    }
 333
 334    if (this->flags.q.invocations &&
 335        q.flags.q.invocations &&
 336        this->invocations != q.invocations) {
 337       _mesa_glsl_error(loc, state,
 338                        "conflicting invocations counts specified");
 339       return false;
 340    } else if (q.flags.q.invocations) {
 341       this->flags.q.invocations = 1;
 342       this->invocations = q.invocations;
 343    }
 344
 345    if (q.flags.q.early_fragment_tests) {
 346       state->fs_early_fragment_tests = true;
 347    }
 348
 349    if (create_gs_ast) {
 350       node = new(mem_ctx) ast_gs_input_layout(*loc, q.prim_type);
 351    } else if (create_cs_ast) {
 352       /* Infer a local_size of 1 for every unspecified dimension */
 353       unsigned local_size[3];
 354       for (int i = 0; i < 3; i++) {
 355          if (q.flags.q.local_size & (1 << i))
 356             local_size[i] = q.local_size[i];
 357          else
 358             local_size[i] = 1;
 359       }
 360       node = new(mem_ctx) ast_cs_input_layout(*loc, local_size);
 361    }
 362
 363    return true;
 364 }