source/core/program.cpp

   1 #include <algorithm>
   2 #include <cstring>
   3 #include <set>
   4 #include <msp/core/hash.h>
   5 #include <msp/core/maputils.h>
   6 #include <msp/gl/extensions/arb_es2_compatibility.h>
   7 #include <msp/gl/extensions/arb_fragment_shader.h>
   8 #include <msp/gl/extensions/arb_gl_spirv.h>
   9 #include <msp/gl/extensions/arb_geometry_shader4.h>
  10 #include <msp/gl/extensions/arb_shader_objects.h>
  11 #include <msp/gl/extensions/arb_uniform_buffer_object.h>
  12 #include <msp/gl/extensions/arb_vertex_shader.h>
  13 #include <msp/gl/extensions/ext_gpu_shader4.h>
  14 #include <msp/gl/extensions/nv_non_square_matrices.h>
  15 #include <msp/io/print.h>
  16 #include <msp/strings/format.h>
  17 #include "buffer.h"
  18 #include "error.h"
  19 #include "misc.h"
  20 #include "program.h"
  21 #include "resources.h"
  22 #include "shader.h"
  23 #include "glsl/compiler.h"
  24
  25 using namespace std;
  26
  27 namespace Msp {
  28 namespace GL {
  29
  30 Program::Program()
  31 {
  32         init();
  33 }
  34
  35 Program::Program(const std::string &source)
  36 {
  37         init();
  38
  39         GlslModule mod;
  40         mod.set_source(source);
  41         add_stages(mod);
  42
  43         link();
  44         module = 0;
  45 }
  46
  47 Program::Program(const string &vert, const string &frag)
  48 {
  49         init();
  50
  51 #pragma GCC diagnostic push
  52 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
  53         attach_shader_owned(new VertexShader(vert));
  54         attach_shader_owned(new FragmentShader(frag));
  55 #pragma GCC diagnostic pop
  56         link();
  57 }
  58
  59 Program::Program(const Module &mod, const map<string, int> &spec_values)
  60 {
  61         init();
  62         add_stages(mod, spec_values);
  63         link();
  64 }
  65
  66 void Program::init()
  67 {
  68         static Require _req(ARB_shader_objects);
  69
  70         id = glCreateProgram();
  71         module = 0;
  72         linked = false;
  73 }
  74
  75 Program::~Program()
  76 {
  77         for(vector<unsigned>::iterator i=stage_ids.begin(); i!=stage_ids.end(); ++i)
  78                 glDeleteShader(*i);
  79         glDeleteProgram(id);
  80 }
  81
  82 void Program::add_stages(const Module &mod, const map<string, int> &spec_values)
  83 {
  84         if(!stage_ids.empty())
  85                 throw invalid_operation("Program::add_stages");
  86
  87         switch(mod.get_format())
  88         {
  89         case Module::GLSL: return add_glsl_stages(static_cast<const GlslModule &>(mod), spec_values);
  90         case Module::SPIR_V: return add_spirv_stages(static_cast<const SpirVModule &>(mod), spec_values);
  91         default: throw invalid_argument("Program::add_stages");
  92         }
  93 }
  94
  95 unsigned Program::add_stage(GLenum type)
  96 {
  97         switch(type)
  98         {
  99         case GL_VERTEX_SHADER: { static Require _req(ARB_vertex_shader); } break;
 100         case GL_GEOMETRY_SHADER: { static Require _req(ARB_geometry_shader4); } break;
 101         case GL_FRAGMENT_SHADER: { static Require _req(ARB_fragment_shader); } break;
 102         default: throw invalid_argument("Program::add_stage");
 103         }
 104
 105         unsigned stage_id = glCreateShader(type);
 106         stage_ids.push_back(stage_id);
 107         glAttachShader(id, stage_id);
 108
 109         return stage_id;
 110 }
 111
 112 void Program::add_glsl_stages(const GlslModule &mod, const map<string, int> &spec_values)
 113 {
 114         module = &mod;
 115
 116         SL::Compiler compiler;
 117         compiler.set_source(mod.get_prepared_source(), "<module>");
 118         compiler.specialize(spec_values);
 119         compiler.compile(SL::Compiler::PROGRAM);
 120 #ifdef DEBUG
 121         string diagnostics = compiler.get_diagnostics();
 122         if(!diagnostics.empty())
 123                 IO::print("Program diagnostics:\n%s\n", diagnostics);
 124 #endif
 125
 126         vector<SL::Stage::Type> stages = compiler.get_stages();
 127         for(vector<SL::Stage::Type>::const_iterator i=stages.begin(); i!=stages.end(); ++i)
 128         {
 129                 unsigned stage_id = 0;
 130                 switch(*i)
 131                 {
 132                 case SL::Stage::VERTEX: stage_id = add_stage(GL_VERTEX_SHADER); break;
 133                 case SL::Stage::GEOMETRY: stage_id = add_stage(GL_GEOMETRY_SHADER); break;
 134                 case SL::Stage::FRAGMENT: stage_id = add_stage(GL_FRAGMENT_SHADER); break;
 135                 default: throw invalid_operation("Program::add_glsl_stages");
 136                 }
 137
 138                 string stage_src = compiler.get_stage_glsl(*i);
 139                 const char *src_ptr = stage_src.data();
 140                 int src_len = stage_src.size();
 141                 glShaderSource(stage_id, 1, &src_ptr, &src_len);
 142
 143                 if(*i==SL::Stage::VERTEX)
 144                 {
 145                         const map<string, unsigned> &attribs = compiler.get_vertex_attributes();
 146                         for(map<string, unsigned>::const_iterator j=attribs.begin(); j!=attribs.end(); ++j)
 147                                 glBindAttribLocation(id, j->second, j->first.c_str());
 148                 }
 149
 150                 if(*i==SL::Stage::FRAGMENT && EXT_gpu_shader4)
 151                 {
 152                         const map<string, unsigned> &frag_outs = compiler.get_fragment_outputs();
 153                         for(map<string, unsigned>::const_iterator j=frag_outs.begin(); j!=frag_outs.end(); ++j)
 154                                 glBindFragDataLocation(id, j->second, j->first.c_str());
 155                 }
 156
 157                 compile_glsl_stage(stage_id);
 158         }
 159 }
 160
 161 void Program::compile_glsl_stage(unsigned stage_id)
 162 {
 163         glCompileShader(stage_id);
 164         bool compiled = get_shader_i(stage_id, GL_COMPILE_STATUS);
 165
 166         GLsizei info_log_len = get_shader_i(stage_id, GL_INFO_LOG_LENGTH);
 167         string info_log(info_log_len+1, 0);
 168         glGetShaderInfoLog(stage_id, info_log_len+1, &info_log_len, &info_log[0]);
 169         info_log.erase(info_log_len);
 170         if(module && module->get_format()==Module::GLSL)
 171                 info_log = static_cast<const GlslModule *>(module)->get_source_map().translate_errors(info_log);
 172
 173         if(!compiled)
 174                 throw compile_error(info_log);
 175 #ifdef DEBUG
 176         if(!info_log.empty())
 177                 IO::print("Shader compile info log:\n%s", info_log);
 178 #endif
 179 }
 180
 181 void Program::add_spirv_stages(const SpirVModule &mod, const map<string, int> &spec_values)
 182 {
 183         static Require _req(ARB_gl_spirv);
 184         static Require _req2(ARB_ES2_compatibility);
 185
 186         module = &mod;
 187
 188         const vector<SpirVModule::EntryPoint> &entry_points = mod.get_entry_points();
 189         std::set<SpirVModule::Stage> stages;
 190         for(vector<SpirVModule::EntryPoint>::const_iterator i=entry_points.begin(); i!=entry_points.end(); ++i)
 191         {
 192                 if(stages.count(i->stage))
 193                         throw invalid_argument("Program::add_spirv_stages");
 194
 195                 switch(i->stage)
 196                 {
 197                 case SpirVModule::VERTEX: add_stage(GL_VERTEX_SHADER); break;
 198                 case SpirVModule::GEOMETRY: add_stage(GL_GEOMETRY_SHADER); break;
 199                 case SpirVModule::FRAGMENT: add_stage(GL_FRAGMENT_SHADER); break;
 200                 default: throw invalid_operation("Program::add_spirv_stages");
 201                 }
 202
 203                 stages.insert(i->stage);
 204         }
 205
 206         const vector<UInt32> &code = mod.get_code();
 207         glShaderBinary(stage_ids.size(), &stage_ids[0], GL_SHADER_BINARY_FORMAT_SPIR_V, &code[0], code.size()*4);
 208
 209         const vector<SpirVModule::SpecConstant> &spec_consts = mod.get_spec_constants();
 210         vector<unsigned> spec_id_array;
 211         vector<unsigned> spec_value_array;
 212         spec_id_array.reserve(spec_consts.size());
 213         spec_value_array.reserve(spec_consts.size());
 214         for(vector<SpirVModule::SpecConstant>::const_iterator i=spec_consts.begin(); i!=spec_consts.end(); ++i)
 215         {
 216                 map<string, int>::const_iterator j = spec_values.find(i->name);
 217                 if(j!=spec_values.end())
 218                 {
 219                         spec_id_array.push_back(i->constant_id);
 220                         spec_value_array.push_back(j->second);
 221                 }
 222         }
 223
 224         vector<SpirVModule::EntryPoint>::const_iterator j=entry_points.begin();
 225         for(vector<unsigned>::const_iterator i=stage_ids.begin(); i!=stage_ids.end(); ++i, ++j)
 226                 glSpecializeShader(*i, j->name.c_str(), spec_id_array.size(), &spec_id_array[0], &spec_value_array[0]);
 227 }
 228
 229 #pragma GCC diagnostic push
 230 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 231 void Program::attach_shader(Shader &shader)
 232 {
 233         unsigned shader_id = shader.steal_id();
 234         if(!shader_id)
 235                 throw invalid_argument("Program::attach_shader");
 236         stage_ids.push_back(shader_id);
 237         compile_glsl_stage(shader_id);
 238 }
 239
 240 void Program::attach_shader_owned(Shader *shader)
 241 {
 242         attach_shader(*shader);
 243         delete shader;
 244 }
 245
 246 void Program::detach_shader(Shader &)
 247 {
 248 }
 249
 250 const vector<Shader *> &Program::get_attached_shaders() const
 251 {
 252         static vector<Shader *> dummy;
 253         return dummy;
 254 }
 255
 256 void Program::bind_attribute(unsigned index, const string &name)
 257 {
 258         static Require _req(ARB_vertex_shader);
 259         glBindAttribLocation(id, index, name.c_str());
 260 }
 261
 262 void Program::bind_attribute(VertexAttribute attr, const string &name)
 263 {
 264         bind_attribute(get_attribute_semantic(attr), name);
 265 }
 266
 267 void Program::bind_fragment_data(unsigned index, const string &name)
 268 {
 269         static Require _req(EXT_gpu_shader4);
 270         glBindFragDataLocation(id, index, name.c_str());
 271 }
 272 #pragma GCC diagnostic pop
 273
 274 void Program::link()
 275 {
 276         if(stage_ids.empty())
 277                 throw invalid_operation("Program::link");
 278
 279         uniforms.clear();
 280
 281         glLinkProgram(id);
 282         linked = get_program_i(id, GL_LINK_STATUS);
 283
 284         GLsizei info_log_len = get_program_i(id, GL_INFO_LOG_LENGTH);
 285         string info_log(info_log_len+1, 0);
 286         glGetProgramInfoLog(id, info_log_len+1, &info_log_len, &info_log[0]);
 287         info_log.erase(info_log_len);
 288         if(module && module->get_format()==Module::GLSL)
 289                 info_log = static_cast<const GlslModule *>(module)->get_source_map().translate_errors(info_log);
 290
 291         if(!linked)
 292                 throw compile_error(info_log);
 293 #ifdef DEBUG
 294         if(!info_log.empty())
 295                 IO::print("Program link info log:\n%s", info_log);
 296 #endif
 297
 298         if(module->get_format()==Module::GLSL)
 299         {
 300                 query_uniforms();
 301                 query_attributes();
 302         }
 303         else if(module->get_format()==Module::SPIR_V)
 304         {
 305                 collect_uniforms();
 306                 collect_attributes();
 307         }
 308
 309         for(UniformMap::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
 310                 require_type(i->second.type);
 311         for(AttributeMap::const_iterator i=attributes.begin(); i!=attributes.end(); ++i)
 312                 require_type(i->second.type);
 313 }
 314
 315 void Program::query_uniforms()
 316 {
 317         unsigned count = get_program_i(id, GL_ACTIVE_UNIFORMS);
 318         vector<UniformInfo *> uniforms_by_index(count);
 319         for(unsigned i=0; i<count; ++i)
 320         {
 321                 char name[128];
 322                 int len = 0;
 323                 int size;
 324                 GLenum type;
 325                 glGetActiveUniform(id, i, sizeof(name), &len, &size, &type, name);
 326                 if(len && strncmp(name, "gl_", 3))
 327                 {
 328                         /* Some implementations report the first element of a uniform array,
 329                         others report just the name of the array itself. */
 330                         if(len>3 && !strcmp(name+len-3, "[0]"))
 331                                 name[len-3] = 0;
 332
 333                         UniformInfo &info = uniforms[name];
 334                         info.block = 0;
 335                         info.name = name;
 336                         info.array_size = size;
 337                         info.array_stride = 0;
 338                         info.matrix_stride = 0;
 339                         info.type = from_gl_type(type);
 340                         uniforms_by_index[i] = &info;
 341                 }
 342         }
 343
 344         if(ARB_uniform_buffer_object)
 345                 query_uniform_blocks(uniforms_by_index);
 346
 347         UniformBlockInfo &default_block = uniform_blocks[string()];
 348         default_block.data_size = 0;
 349         default_block.bind_point = -1;
 350
 351         for(UniformMap::iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
 352                 if(!i->second.block)
 353                 {
 354                         i->second.location = glGetUniformLocation(id, i->second.name.c_str());
 355                         i->second.block = &default_block;
 356                         default_block.uniforms.push_back(&i->second);
 357                 }
 358
 359         default_block.layout_hash = compute_layout_hash(default_block.uniforms);
 360
 361         update_layout_hash();
 362 }
 363
 364 void Program::query_uniform_blocks(const vector<UniformInfo *> &uniforms_by_index)
 365 {
 366         uniform_blocks.clear();
 367
 368         std::set<unsigned> used_bind_points;
 369         unsigned count = get_program_i(id, GL_ACTIVE_UNIFORM_BLOCKS);
 370         for(unsigned i=0; i<count; ++i)
 371         {
 372                 char name[128];
 373                 int len;
 374                 glGetActiveUniformBlockName(id, i, sizeof(name), &len, name);
 375                 UniformBlockInfo &info = uniform_blocks[name];
 376                 info.name = name;
 377
 378                 int value;
 379                 glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_DATA_SIZE, &value);
 380                 info.data_size = value;
 381
 382                 glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS, &value);
 383                 vector<int> indices(value);
 384                 glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES, &indices[0]);
 385                 for(vector<int>::iterator j=indices.begin(); j!=indices.end(); ++j)
 386                 {
 387                         if(!uniforms_by_index[*j])
 388                                 throw logic_error("Program::link");
 389                         info.uniforms.push_back(uniforms_by_index[*j]);
 390                         uniforms_by_index[*j]->block = &info;
 391                 }
 392
 393                 vector<unsigned> indices2(indices.begin(), indices.end());
 394                 vector<int> values(indices.size());
 395                 glGetActiveUniformsiv(id, indices.size(), &indices2[0], GL_UNIFORM_OFFSET, &values[0]);
 396                 for(unsigned j=0; j<indices.size(); ++j)
 397                         uniforms_by_index[indices[j]]->location = values[j];
 398
 399                 indices2.clear();
 400                 for(vector<int>::iterator j=indices.begin(); j!=indices.end(); ++j)
 401                         if(uniforms_by_index[*j]->array_size>1)
 402                                 indices2.push_back(*j);
 403                 if(!indices2.empty())
 404                 {
 405                         glGetActiveUniformsiv(id, indices2.size(), &indices2[0], GL_UNIFORM_ARRAY_STRIDE, &values[0]);
 406                         for(unsigned j=0; j<indices2.size(); ++j)
 407                                 uniforms_by_index[indices2[j]]->array_stride = values[j];
 408                 }
 409
 410                 indices2.clear();
 411                 for(vector<int>::iterator j=indices.begin(); j!=indices.end(); ++j)
 412                 {
 413                         DataType t = uniforms_by_index[*j]->type;
 414                         if(is_matrix(t))
 415                                 indices2.push_back(*j);
 416                 }
 417                 if(!indices2.empty())
 418                 {
 419                         glGetActiveUniformsiv(id, indices2.size(), &indices2[0], GL_UNIFORM_MATRIX_STRIDE, &values[0]);
 420                         for(unsigned j=0; j<indices2.size(); ++j)
 421                                 uniforms_by_index[indices2[j]]->matrix_stride = values[j];
 422                 }
 423
 424                 sort(info.uniforms.begin(), info.uniforms.end(), uniform_location_compare);
 425                 info.layout_hash = compute_layout_hash(info.uniforms);
 426                 unsigned n_bindings = BufferRange::get_n_uniform_buffer_bindings();
 427                 info.bind_point = info.layout_hash%n_bindings;
 428                 while(used_bind_points.count(info.bind_point))
 429                         info.bind_point = (info.bind_point+1)%n_bindings;
 430                 glUniformBlockBinding(id, i, info.bind_point);
 431                 used_bind_points.insert(info.bind_point);
 432         }
 433 }
 434
 435 void Program::query_attributes()
 436 {
 437         unsigned count = get_program_i(id, GL_ACTIVE_ATTRIBUTES);
 438         for(unsigned i=0; i<count; ++i)
 439         {
 440                 char name[128];
 441                 int len = 0;
 442                 int size;
 443                 GLenum type;
 444                 glGetActiveAttrib(id, i, sizeof(name), &len, &size, &type, name);
 445                 if(len && strncmp(name, "gl_", 3))
 446                 {
 447                         if(len>3 && !strcmp(name+len-3, "[0]"))
 448                                 name[len-3] = 0;
 449
 450                         AttributeInfo &info = attributes[name];
 451                         info.name = name;
 452                         info.location = glGetAttribLocation(id, name);
 453                         info.array_size = size;
 454                         info.type = from_gl_type(type);
 455                 }
 456         }
 457 }
 458
 459 void Program::collect_uniforms()
 460 {
 461         const SpirVModule &mod = static_cast<const SpirVModule &>(*module);
 462
 463         UniformBlockInfo &default_block = uniform_blocks[string()];
 464         default_block.data_size = 0;
 465         default_block.bind_point = -1;
 466
 467         const vector<SpirVModule::Variable> &variables = mod.get_variables();
 468         for(vector<SpirVModule::Variable>::const_iterator i=variables.begin(); i!=variables.end(); ++i)
 469         {
 470                 if(i->storage==SpirVModule::UNIFORM && i->struct_type)
 471                 {
 472                         UniformBlockInfo &info = uniform_blocks[i->struct_type->name];
 473                         info.name = i->struct_type->name;
 474                         info.bind_point = i->binding;
 475                         info.data_size = i->struct_type->size;
 476
 477                         string prefix;
 478                         if(!i->name.empty())
 479                                 prefix = i->struct_type->name+".";
 480                         collect_block_uniforms(info, *i->struct_type, prefix, 0);
 481
 482                         info.layout_hash = compute_layout_hash(info.uniforms);
 483                 }
 484                 else if(i->storage==SpirVModule::UNIFORM_CONSTANT && i->location>=0)
 485                 {
 486                         UniformInfo &info = uniforms[i->name];
 487                         info.name = i->name;
 488                         info.block = &default_block;
 489                         info.location = i->location;
 490                         info.array_size = i->array_size;
 491                         info.array_stride = 0;
 492                         info.matrix_stride = 0;
 493                         info.type = i->type;
 494                         default_block.uniforms.push_back(&info);
 495                 }
 496         }
 497
 498         default_block.layout_hash = compute_layout_hash(default_block.uniforms);
 499
 500         update_layout_hash();
 501 }
 502
 503 void Program::collect_block_uniforms(UniformBlockInfo &block, const SpirVModule::Structure &strct, const string &prefix, unsigned base_offset)
 504 {
 505         for(vector<SpirVModule::StructMember>::const_iterator i=strct.members.begin(); i!=strct.members.end(); ++i)
 506         {
 507                 if(i->struct_type)
 508                 {
 509                         if(i->array_size)
 510                         {
 511                                 for(unsigned j=0; j<i->array_size; ++j)
 512                                         collect_block_uniforms(block, *i->struct_type, format("%s%s[%d].", prefix, i->name, j), base_offset+i->offset+i->array_stride*j);
 513                         }
 514                         else
 515                                 collect_block_uniforms(block, *i->struct_type, prefix+i->name+".", base_offset+i->offset);
 516                 }
 517                 else
 518                 {
 519                         string name = prefix+i->name;
 520                         UniformInfo &info = uniforms[name];
 521                         info.name = name;
 522                         info.block = &block;
 523                         info.location = i->offset;
 524                         info.array_size = i->array_size;
 525                         info.array_stride = i->array_stride;
 526                         info.matrix_stride = i->matrix_stride;
 527                         info.type = i->type;
 528                         block.uniforms.push_back(&info);
 529                 }
 530         }
 531 }
 532
 533 void Program::collect_attributes()
 534 {
 535         const SpirVModule &mod = static_cast<const SpirVModule &>(*module);
 536
 537         const vector<SpirVModule::EntryPoint> &entry_points = mod.get_entry_points();
 538         for(vector<SpirVModule::EntryPoint>::const_iterator i=entry_points.begin(); i!=entry_points.end(); ++i)
 539                 if(i->stage==SpirVModule::VERTEX && i->name=="main")
 540                 {
 541                         for(vector<const SpirVModule::Variable *>::const_iterator j=i->globals.begin(); j!=i->globals.end(); ++j)
 542                                 if((*j)->storage==SpirVModule::INPUT)
 543                                 {
 544                                         AttributeInfo &info = attributes[(*j)->name];
 545                                         info.location = (*j)->location;
 546                                         info.array_size = (*j)->array_size;
 547                                         info.type = (*j)->type;
 548                                 }
 549                 }
 550 }
 551
 552 void Program::update_layout_hash()
 553 {
 554         string layout_descriptor;
 555         for(UniformBlockMap::const_iterator i=uniform_blocks.begin(); i!=uniform_blocks.end(); ++i)
 556                 layout_descriptor += format("%d:%x\n", i->second.bind_point, i->second.layout_hash);
 557         uniform_layout_hash = hash32(layout_descriptor);
 558 }
 559
 560 Program::LayoutHash Program::compute_layout_hash(const vector<const UniformInfo *> &uniforms)
 561 {
 562         string layout_descriptor;
 563         for(vector<const UniformInfo *>::const_iterator i = uniforms.begin(); i!=uniforms.end(); ++i)
 564                 layout_descriptor += format("%d:%s:%x:%d\n", (*i)->location, (*i)->name, (*i)->type, (*i)->array_size);
 565         return hash32(layout_descriptor);
 566 }
 567
 568 bool Program::uniform_location_compare(const UniformInfo *uni1, const UniformInfo *uni2)
 569 {
 570         return uni1->location<uni2->location;
 571 }
 572
 573 string Program::get_info_log() const
 574 {
 575         GLsizei len = get_program_i(id, GL_INFO_LOG_LENGTH);
 576         string log(len+1, 0);
 577         glGetProgramInfoLog(id, len+1, &len, &log[0]);
 578         log.erase(len);
 579         return log;
 580 }
 581
 582 const Program::UniformBlockInfo &Program::get_uniform_block_info(const string &name) const
 583 {
 584         return get_item(uniform_blocks, name);
 585 }
 586
 587 const Program::UniformInfo &Program::get_uniform_info(const string &name) const
 588 {
 589         return get_item(uniforms, name);
 590 }
 591
 592 int Program::get_uniform_location(const string &n) const
 593 {
 594         if(n[n.size()-1]==']')
 595                 throw invalid_argument("Program::get_uniform_location");
 596
 597         UniformMap::const_iterator i = uniforms.find(n);
 598         if(i==uniforms.end())
 599                 return -1;
 600
 601         return i->second.block->bind_point<0 ? i->second.location : -1;
 602 }
 603
 604 const Program::AttributeInfo &Program::get_attribute_info(const string &name) const
 605 {
 606         return get_item(attributes, name);
 607 }
 608
 609 int Program::get_attribute_location(const string &n) const
 610 {
 611         if(n[n.size()-1]==']')
 612                 throw invalid_argument("Program::get_attribute_location");
 613
 614         AttributeMap::const_iterator i = attributes.find(n);
 615         return i!=attributes.end() ? i->second.location : -1;
 616 }
 617
 618 void Program::bind() const
 619 {
 620         if(!linked)
 621                 throw invalid_operation("Program::bind");
 622
 623         if(!set_current(this))
 624                 return;
 625
 626         glUseProgram(id);
 627 }
 628
 629 void Program::unbind()
 630 {
 631         if(!set_current(0))
 632                 return;
 633
 634         glUseProgram(0);
 635 }
 636
 637
 638 Program::Loader::Loader(Program &p, Collection &c):
 639         DataFile::CollectionObjectLoader<Program>(p, &c)
 640 {
 641         add("module",          &Loader::module);
 642
 643         // Deprecated
 644         add("attribute",       &Loader::attribute);
 645         add("fragment_shader", &Loader::fragment_shader);
 646         add("geometry_shader", &Loader::geometry_shader);
 647         add("vertex_shader",   &Loader::vertex_shader);
 648 }
 649
 650 void Program::Loader::finish()
 651 {
 652         obj.link();
 653 }
 654
 655 void Program::Loader::module(const string &n)
 656 {
 657         map<string, int> spec_values;
 658         SpecializationLoader ldr(spec_values);
 659         load_sub_with(ldr);
 660         obj.add_stages(get_collection().get<Module>(n), spec_values);
 661 }
 662
 663 #pragma GCC diagnostic push
 664 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 665 void Program::Loader::attribute(unsigned i, const string &n)
 666 {
 667         obj.bind_attribute(i, n);
 668 }
 669
 670 void Program::Loader::fragment_shader(const string &src)
 671 {
 672         obj.attach_shader_owned(new FragmentShader(src));
 673 }
 674
 675 void Program::Loader::geometry_shader(const string &src)
 676 {
 677         obj.attach_shader_owned(new GeometryShader(src));
 678 }
 679
 680 void Program::Loader::vertex_shader(const string &src)
 681 {
 682         obj.attach_shader_owned(new VertexShader(src));
 683 }
 684 #pragma GCC diagnostic pop
 685
 686
 687 DataFile::Loader::ActionMap Program::SpecializationLoader::shared_actions;
 688
 689 Program::SpecializationLoader::SpecializationLoader(map<string, int> &sv):
 690         spec_values(sv)
 691 {
 692         set_actions(shared_actions);
 693 }
 694
 695 void Program::SpecializationLoader::init_actions()
 696 {
 697         add("specialize", &SpecializationLoader::specialize_bool);
 698         add("specialize", &SpecializationLoader::specialize_int);
 699 }
 700
 701 void Program::SpecializationLoader::specialize_bool(const string &name, bool value)
 702 {
 703         spec_values[name] = value;
 704 }
 705
 706 void Program::SpecializationLoader::specialize_int(const string &name, int value)
 707 {
 708         spec_values[name] = value;
 709 }
 710
 711 } // namespace GL
 712 } // namespace Msp