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    /* Uniform block layout qualifiers get to overwrite each
 126     * other (rightmost having priority), while all other
 127     * qualifiers currently don't allow duplicates.
 128     */
 129
 130    if ((this->flags.i & q.flags.i & ~(ubo_mat_mask.flags.i |
 131                                       ubo_layout_mask.flags.i |
 132                                       ubo_binding_mask.flags.i)) != 0) {
 133       _mesa_glsl_error(loc, state,
 134                        "duplicate layout qualifiers used");
 135       return false;
 136    }
 137
 138    if (q.flags.q.prim_type) {
 139       if (this->flags.q.prim_type && this->prim_type != q.prim_type) {
 140          _mesa_glsl_error(loc, state,
 141                           "conflicting primitive type qualifiers used");
 142          return false;
 143       }
 144       this->prim_type = q.prim_type;
 145    }
 146
 147    if (q.flags.q.max_vertices) {
 148       if (this->flags.q.max_vertices && this->max_vertices != q.max_vertices) {
 149          _mesa_glsl_error(loc, state,
 150                           "geometry shader set conflicting max_vertices "
 151                           "(%d and %d)", this->max_vertices, q.max_vertices);
 152          return false;
 153       }
 154       this->max_vertices = q.max_vertices;
 155    }
 156
 157    if ((q.flags.i & ubo_mat_mask.flags.i) != 0)
 158       this->flags.i &= ~ubo_mat_mask.flags.i;
 159    if ((q.flags.i & ubo_layout_mask.flags.i) != 0)
 160       this->flags.i &= ~ubo_layout_mask.flags.i;
 161
 162    for (int i = 0; i < 3; i++) {
 163       if (q.flags.q.local_size & (1 << i)) {
 164          if ((this->flags.q.local_size & (1 << i)) &&
 165              this->local_size[i] != q.local_size[i]) {
 166             _mesa_glsl_error(loc, state,
 167                              "compute shader set conflicting values for "
 168                              "local_size_%c (%d and %d)", 'x' + i,
 169                              this->local_size[i], q.local_size[i]);
 170             return false;
 171          }
 172          this->local_size[i] = q.local_size[i];
 173       }
 174    }
 175
 176    this->flags.i |= q.flags.i;
 177
 178    if (q.flags.q.explicit_location)
 179       this->location = q.location;
 180
 181    if (q.flags.q.explicit_index)
 182       this->index = q.index;
 183
 184    if (q.flags.q.explicit_binding)
 185       this->binding = q.binding;
 186
 187    if (q.flags.q.explicit_offset)
 188       this->offset = q.offset;
 189
 190    if (q.precision != ast_precision_none)
 191       this->precision = q.precision;
 192
 193    if (q.flags.q.explicit_image_format) {
 194       this->image_format = q.image_format;
 195       this->image_base_type = q.image_base_type;
 196    }
 197
 198    return true;
 199 }
 200
 201 bool
 202 ast_type_qualifier::merge_in_qualifier(YYLTYPE *loc,
 203                                        _mesa_glsl_parse_state *state,
 204                                        ast_type_qualifier q,
 205                                        ast_node* &node)
 206 {
 207    void *mem_ctx = state;
 208    bool create_gs_ast = false;
 209    bool create_cs_ast = false;
 210    ast_type_qualifier valid_in_mask;
 211    valid_in_mask.flags.i = 0;
 212
 213    switch (state->stage) {
 214    case MESA_SHADER_GEOMETRY:
 215       if (q.flags.q.prim_type) {
 216          /* Make sure this is a valid input primitive type. */
 217          switch (q.prim_type) {
 218          case GL_POINTS:
 219          case GL_LINES:
 220          case GL_LINES_ADJACENCY:
 221          case GL_TRIANGLES:
 222          case GL_TRIANGLES_ADJACENCY:
 223             break;
 224          default:
 225             _mesa_glsl_error(loc, state,
 226                              "invalid geometry shader input primitive type");
 227             break;
 228          }
 229       }
 230
 231       create_gs_ast |=
 232          q.flags.q.prim_type &&
 233          !state->in_qualifier->flags.q.prim_type;
 234
 235       valid_in_mask.flags.q.prim_type = 1;
 236       valid_in_mask.flags.q.invocations = 1;
 237       break;
 238    case MESA_SHADER_FRAGMENT:
 239       if (q.flags.q.early_fragment_tests) {
 240          state->early_fragment_tests = true;
 241       } else {
 242          _mesa_glsl_error(loc, state, "invalid input layout qualifier");
 243       }
 244       break;
 245    case MESA_SHADER_COMPUTE:
 246       create_cs_ast |=
 247          q.flags.q.local_size != 0 &&
 248          state->in_qualifier->flags.q.local_size == 0;
 249
 250       valid_in_mask.flags.q.local_size = 1;
 251       break;
 252    default:
 253       _mesa_glsl_error(loc, state,
 254                        "input layout qualifiers only valid in "
 255                        "geometry, fragment and compute shaders");
 256       break;
 257    }
 258
 259    /* Generate an error when invalid input layout qualifiers are used. */
 260    if ((q.flags.i & ~valid_in_mask.flags.i) != 0) {
 261       _mesa_glsl_error(loc, state,
 262                        "invalid input layout qualifiers used");
 263       return false;
 264    }
 265
 266    /* Input layout qualifiers can be specified multiple
 267     * times in separate declarations, as long as they match.
 268     */
 269    if (this->flags.q.prim_type) {
 270       if (q.flags.q.prim_type &&
 271           this->prim_type != q.prim_type) {
 272          _mesa_glsl_error(loc, state,
 273                           "conflicting input primitive types specified");
 274       }
 275    } else if (q.flags.q.prim_type) {
 276       state->in_qualifier->flags.q.prim_type = 1;
 277       state->in_qualifier->prim_type = q.prim_type;
 278    }
 279
 280    if (this->flags.q.invocations &&
 281        q.flags.q.invocations &&
 282        this->invocations != q.invocations) {
 283       _mesa_glsl_error(loc, state,
 284                        "conflicting invocations counts specified");
 285       return false;
 286    } else if (q.flags.q.invocations) {
 287       this->flags.q.invocations = 1;
 288       this->invocations = q.invocations;
 289    }
 290
 291    if (create_gs_ast) {
 292       node = new(mem_ctx) ast_gs_input_layout(*loc, q.prim_type);
 293    } else if (create_cs_ast) {
 294       /* Infer a local_size of 1 for every unspecified dimension */
 295       unsigned local_size[3];
 296       for (int i = 0; i < 3; i++) {
 297          if (q.flags.q.local_size & (1 << i))
 298             local_size[i] = q.local_size[i];
 299          else
 300             local_size[i] = 1;
 301       }
 302       node = new(mem_ctx) ast_cs_input_layout(*loc, local_size);
 303    }
 304
 305    return true;
 306 }