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         uniform_blocks.clear();
 281         attributes.clear();
 282
 283         glLinkProgram(id);
 284         linked = get_program_i(id, GL_LINK_STATUS);
 285
 286         GLsizei info_log_len = get_program_i(id, GL_INFO_LOG_LENGTH);
 287         string info_log(info_log_len+1, 0);
 288         glGetProgramInfoLog(id, info_log_len+1, &info_log_len, &info_log[0]);
 289         info_log.erase(info_log_len);
 290         if(module && module->get_format()==Module::GLSL)
 291                 info_log = static_cast<const GlslModule *>(module)->get_source_map().translate_errors(info_log);
 292
 293         if(!linked)
 294                 throw compile_error(info_log);
 295 #ifdef DEBUG
 296         if(!info_log.empty())
 297                 IO::print("Program link info log:\n%s", info_log);
 298 #endif
 299
 300         if(module->get_format()==Module::GLSL)
 301         {
 302                 query_uniforms();
 303                 query_attributes();
 304         }
 305         else if(module->get_format()==Module::SPIR_V)
 306         {
 307                 collect_uniforms();
 308                 collect_attributes();
 309         }
 310
 311         for(UniformMap::const_iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
 312                 require_type(i->second.type);
 313         for(AttributeMap::const_iterator i=attributes.begin(); i!=attributes.end(); ++i)
 314                 require_type(i->second.type);
 315 }
 316
 317 void Program::query_uniforms()
 318 {
 319         unsigned count = get_program_i(id, GL_ACTIVE_UNIFORMS);
 320         vector<UniformInfo *> uniforms_by_index(count);
 321         for(unsigned i=0; i<count; ++i)
 322         {
 323                 char name[128];
 324                 int len = 0;
 325                 int size;
 326                 GLenum type;
 327                 glGetActiveUniform(id, i, sizeof(name), &len, &size, &type, name);
 328                 if(len && strncmp(name, "gl_", 3))
 329                 {
 330                         /* Some implementations report the first element of a uniform array,
 331                         others report just the name of the array itself. */
 332                         if(len>3 && !strcmp(name+len-3, "[0]"))
 333                                 name[len-3] = 0;
 334
 335                         UniformInfo &info = uniforms[name];
 336                         info.name = name;
 337                         info.array_size = size;
 338                         info.type = from_gl_type(type);
 339                         uniforms_by_index[i] = &info;
 340                 }
 341         }
 342
 343         if(ARB_uniform_buffer_object)
 344                 query_uniform_blocks(uniforms_by_index);
 345
 346         UniformBlockInfo &default_block = uniform_blocks[string()];
 347
 348         for(UniformMap::iterator i=uniforms.begin(); i!=uniforms.end(); ++i)
 349                 if(!i->second.block)
 350                 {
 351                         i->second.location = glGetUniformLocation(id, i->second.name.c_str());
 352                         i->second.block = &default_block;
 353                         default_block.uniforms.push_back(&i->second);
 354                 }
 355
 356         default_block.layout_hash = compute_layout_hash(default_block.uniforms);
 357
 358         update_layout_hash();
 359 }
 360
 361 void Program::query_uniform_blocks(const vector<UniformInfo *> &uniforms_by_index)
 362 {
 363         std::set<unsigned> used_bind_points;
 364         unsigned count = get_program_i(id, GL_ACTIVE_UNIFORM_BLOCKS);
 365         for(unsigned i=0; i<count; ++i)
 366         {
 367                 char name[128];
 368                 int len;
 369                 glGetActiveUniformBlockName(id, i, sizeof(name), &len, name);
 370                 UniformBlockInfo &info = uniform_blocks[name];
 371                 info.name = name;
 372
 373                 int value;
 374                 glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_DATA_SIZE, &value);
 375                 info.data_size = value;
 376
 377                 glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORMS, &value);
 378                 vector<int> indices(value);
 379                 glGetActiveUniformBlockiv(id, i, GL_UNIFORM_BLOCK_ACTIVE_UNIFORM_INDICES, &indices[0]);
 380                 for(vector<int>::iterator j=indices.begin(); j!=indices.end(); ++j)
 381                 {
 382                         if(!uniforms_by_index[*j])
 383                                 throw logic_error("Program::link");
 384                         info.uniforms.push_back(uniforms_by_index[*j]);
 385                         uniforms_by_index[*j]->block = &info;
 386                 }
 387
 388                 vector<unsigned> query_indices(indices.begin(), indices.end());
 389                 vector<int> values(indices.size());
 390                 glGetActiveUniformsiv(id, query_indices.size(), &query_indices[0], GL_UNIFORM_OFFSET, &values[0]);
 391                 for(unsigned j=0; j<indices.size(); ++j)
 392                         uniforms_by_index[indices[j]]->offset = values[j];
 393
 394                 query_indices.clear();
 395                 for(vector<int>::iterator j=indices.begin(); j!=indices.end(); ++j)
 396                         if(uniforms_by_index[*j]->array_size>1)
 397                                 query_indices.push_back(*j);
 398                 if(!query_indices.empty())
 399                 {
 400                         glGetActiveUniformsiv(id, query_indices.size(), &query_indices[0], GL_UNIFORM_ARRAY_STRIDE, &values[0]);
 401                         for(unsigned j=0; j<query_indices.size(); ++j)
 402                                 uniforms_by_index[query_indices[j]]->array_stride = values[j];
 403                 }
 404
 405                 query_indices.clear();
 406                 for(vector<int>::iterator j=indices.begin(); j!=indices.end(); ++j)
 407                 {
 408                         DataType t = uniforms_by_index[*j]->type;
 409                         if(is_matrix(t))
 410                                 query_indices.push_back(*j);
 411                 }
 412                 if(!query_indices.empty())
 413                 {
 414                         glGetActiveUniformsiv(id, query_indices.size(), &query_indices[0], GL_UNIFORM_MATRIX_STRIDE, &values[0]);
 415                         for(unsigned j=0; j<query_indices.size(); ++j)
 416                                 uniforms_by_index[query_indices[j]]->matrix_stride = values[j];
 417                 }
 418
 419                 sort(info.uniforms.begin(), info.uniforms.end(), uniform_location_compare);
 420                 info.layout_hash = compute_layout_hash(info.uniforms);
 421                 unsigned n_bindings = BufferRange::get_n_uniform_buffer_bindings();
 422                 info.bind_point = info.layout_hash%n_bindings;
 423                 while(used_bind_points.count(info.bind_point))
 424                         info.bind_point = (info.bind_point+1)%n_bindings;
 425                 glUniformBlockBinding(id, i, info.bind_point);
 426                 used_bind_points.insert(info.bind_point);
 427         }
 428 }
 429
 430 void Program::query_attributes()
 431 {
 432         unsigned count = get_program_i(id, GL_ACTIVE_ATTRIBUTES);
 433         for(unsigned i=0; i<count; ++i)
 434         {
 435                 char name[128];
 436                 int len = 0;
 437                 int size;
 438                 GLenum type;
 439                 glGetActiveAttrib(id, i, sizeof(name), &len, &size, &type, name);
 440                 if(len && strncmp(name, "gl_", 3))
 441                 {
 442                         if(len>3 && !strcmp(name+len-3, "[0]"))
 443                                 name[len-3] = 0;
 444
 445                         AttributeInfo &info = attributes[name];
 446                         info.name = name;
 447                         info.location = glGetAttribLocation(id, name);
 448                         info.array_size = size;
 449                         info.type = from_gl_type(type);
 450                 }
 451         }
 452 }
 453
 454 void Program::collect_uniforms()
 455 {
 456         const SpirVModule &mod = static_cast<const SpirVModule &>(*module);
 457
 458         UniformBlockInfo &default_block = uniform_blocks[string()];
 459
 460         const vector<SpirVModule::Variable> &variables = mod.get_variables();
 461         for(vector<SpirVModule::Variable>::const_iterator i=variables.begin(); i!=variables.end(); ++i)
 462         {
 463                 if(i->storage==SpirVModule::UNIFORM && i->struct_type)
 464                 {
 465                         UniformBlockInfo &info = uniform_blocks[i->struct_type->name];
 466                         info.name = i->struct_type->name;
 467                         info.bind_point = i->binding;
 468                         info.data_size = i->struct_type->size;
 469
 470                         string prefix;
 471                         if(!i->name.empty())
 472                                 prefix = i->struct_type->name+".";
 473                         collect_block_uniforms(info, *i->struct_type, prefix, 0);
 474
 475                         info.layout_hash = compute_layout_hash(info.uniforms);
 476                 }
 477                 else if(i->storage==SpirVModule::UNIFORM_CONSTANT && i->location>=0)
 478                 {
 479                         UniformInfo &info = uniforms[i->name];
 480                         info.name = i->name;
 481                         info.block = &default_block;
 482                         info.location = i->location;
 483                         info.array_size = i->array_size;
 484                         info.type = i->type;
 485                         default_block.uniforms.push_back(&info);
 486                 }
 487         }
 488
 489         default_block.layout_hash = compute_layout_hash(default_block.uniforms);
 490
 491         update_layout_hash();
 492 }
 493
 494 void Program::collect_block_uniforms(UniformBlockInfo &block, const SpirVModule::Structure &strct, const string &prefix, unsigned base_offset)
 495 {
 496         for(vector<SpirVModule::StructMember>::const_iterator i=strct.members.begin(); i!=strct.members.end(); ++i)
 497         {
 498                 if(i->struct_type)
 499                 {
 500                         if(i->array_size)
 501                         {
 502                                 for(unsigned j=0; j<i->array_size; ++j)
 503                                         collect_block_uniforms(block, *i->struct_type, format("%s%s[%d].", prefix, i->name, j), base_offset+i->offset+i->array_stride*j);
 504                         }
 505                         else
 506                                 collect_block_uniforms(block, *i->struct_type, prefix+i->name+".", base_offset+i->offset);
 507                 }
 508                 else
 509                 {
 510                         string name = prefix+i->name;
 511                         UniformInfo &info = uniforms[name];
 512                         info.name = name;
 513                         info.block = &block;
 514                         info.offset = i->offset;
 515                         info.array_size = i->array_size;
 516                         info.array_stride = i->array_stride;
 517                         info.matrix_stride = i->matrix_stride;
 518                         info.type = i->type;
 519                         block.uniforms.push_back(&info);
 520                 }
 521         }
 522 }
 523
 524 void Program::collect_attributes()
 525 {
 526         const SpirVModule &mod = static_cast<const SpirVModule &>(*module);
 527
 528         const vector<SpirVModule::EntryPoint> &entry_points = mod.get_entry_points();
 529         for(vector<SpirVModule::EntryPoint>::const_iterator i=entry_points.begin(); i!=entry_points.end(); ++i)
 530                 if(i->stage==SpirVModule::VERTEX && i->name=="main")
 531                 {
 532                         for(vector<const SpirVModule::Variable *>::const_iterator j=i->globals.begin(); j!=i->globals.end(); ++j)
 533                                 if((*j)->storage==SpirVModule::INPUT)
 534                                 {
 535                                         AttributeInfo &info = attributes[(*j)->name];
 536                                         info.location = (*j)->location;
 537                                         info.array_size = (*j)->array_size;
 538                                         info.type = (*j)->type;
 539                                 }
 540                 }
 541 }
 542
 543 void Program::update_layout_hash()
 544 {
 545         string layout_descriptor;
 546         for(UniformBlockMap::const_iterator i=uniform_blocks.begin(); i!=uniform_blocks.end(); ++i)
 547                 layout_descriptor += format("%d:%x\n", i->second.bind_point, i->second.layout_hash);
 548         uniform_layout_hash = hash32(layout_descriptor);
 549 }
 550
 551 Program::LayoutHash Program::compute_layout_hash(const vector<const UniformInfo *> &uniforms)
 552 {
 553         string layout_descriptor;
 554         for(vector<const UniformInfo *>::const_iterator i = uniforms.begin(); i!=uniforms.end(); ++i)
 555                 layout_descriptor += format("%d:%s:%x:%d\n", (*i)->location, (*i)->name, (*i)->type, (*i)->array_size);
 556         return hash32(layout_descriptor);
 557 }
 558
 559 bool Program::uniform_location_compare(const UniformInfo *uni1, const UniformInfo *uni2)
 560 {
 561         return uni1->location<uni2->location;
 562 }
 563
 564 string Program::get_info_log() const
 565 {
 566         GLsizei len = get_program_i(id, GL_INFO_LOG_LENGTH);
 567         string log(len+1, 0);
 568         glGetProgramInfoLog(id, len+1, &len, &log[0]);
 569         log.erase(len);
 570         return log;
 571 }
 572
 573 const Program::UniformBlockInfo &Program::get_uniform_block_info(const string &name) const
 574 {
 575         return get_item(uniform_blocks, name);
 576 }
 577
 578 const Program::UniformInfo &Program::get_uniform_info(const string &name) const
 579 {
 580         return get_item(uniforms, name);
 581 }
 582
 583 int Program::get_uniform_location(const string &name) const
 584 {
 585         if(name[name.size()-1]==']')
 586                 throw invalid_argument("Program::get_uniform_location");
 587
 588         UniformMap::const_iterator i = uniforms.find(name);
 589         if(i==uniforms.end())
 590                 return -1;
 591
 592         return i->second.block->bind_point<0 ? i->second.location : -1;
 593 }
 594
 595 const Program::AttributeInfo &Program::get_attribute_info(const string &name) const
 596 {
 597         return get_item(attributes, name);
 598 }
 599
 600 int Program::get_attribute_location(const string &name) const
 601 {
 602         if(name[name.size()-1]==']')
 603                 throw invalid_argument("Program::get_attribute_location");
 604
 605         AttributeMap::const_iterator i = attributes.find(name);
 606         return i!=attributes.end() ? i->second.location : -1;
 607 }
 608
 609 void Program::bind() const
 610 {
 611         if(!linked)
 612                 throw invalid_operation("Program::bind");
 613
 614         if(!set_current(this))
 615                 return;
 616
 617         glUseProgram(id);
 618 }
 619
 620 void Program::unbind()
 621 {
 622         if(!set_current(0))
 623                 return;
 624
 625         glUseProgram(0);
 626 }
 627
 628
 629 Program::UniformInfo::UniformInfo():
 630         block(0),
 631         location(-1),
 632         array_size(0),
 633         array_stride(0),
 634         matrix_stride(0),
 635         type(VOID)
 636 { }
 637
 638
 639 Program::UniformBlockInfo::UniformBlockInfo():
 640         data_size(0),
 641         bind_point(-1),
 642         layout_hash(0)
 643 { }
 644
 645
 646 Program::AttributeInfo::AttributeInfo():
 647         location(-1),
 648         array_size(0),
 649         type(VOID)
 650 { }
 651
 652
 653 Program::Loader::Loader(Program &p, Collection &c):
 654         DataFile::CollectionObjectLoader<Program>(p, &c)
 655 {
 656         add("module",          &Loader::module);
 657
 658         // Deprecated
 659         add("attribute",       &Loader::attribute);
 660         add("fragment_shader", &Loader::fragment_shader);
 661         add("geometry_shader", &Loader::geometry_shader);
 662         add("vertex_shader",   &Loader::vertex_shader);
 663 }
 664
 665 void Program::Loader::finish()
 666 {
 667         obj.link();
 668 }
 669
 670 void Program::Loader::module(const string &n)
 671 {
 672         map<string, int> spec_values;
 673         SpecializationLoader ldr(spec_values);
 674         load_sub_with(ldr);
 675         obj.add_stages(get_collection().get<Module>(n), spec_values);
 676 }
 677
 678 #pragma GCC diagnostic push
 679 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
 680 void Program::Loader::attribute(unsigned i, const string &n)
 681 {
 682         obj.bind_attribute(i, n);
 683 }
 684
 685 void Program::Loader::fragment_shader(const string &src)
 686 {
 687         obj.attach_shader_owned(new FragmentShader(src));
 688 }
 689
 690 void Program::Loader::geometry_shader(const string &src)
 691 {
 692         obj.attach_shader_owned(new GeometryShader(src));
 693 }
 694
 695 void Program::Loader::vertex_shader(const string &src)
 696 {
 697         obj.attach_shader_owned(new VertexShader(src));
 698 }
 699 #pragma GCC diagnostic pop
 700
 701
 702 DataFile::Loader::ActionMap Program::SpecializationLoader::shared_actions;
 703
 704 Program::SpecializationLoader::SpecializationLoader(map<string, int> &sv):
 705         spec_values(sv)
 706 {
 707         set_actions(shared_actions);
 708 }
 709
 710 void Program::SpecializationLoader::init_actions()
 711 {
 712         add("specialize", &SpecializationLoader::specialize_bool);
 713         add("specialize", &SpecializationLoader::specialize_int);
 714 }
 715
 716 void Program::SpecializationLoader::specialize_bool(const string &name, bool value)
 717 {
 718         spec_values[name] = value;
 719 }
 720
 721 void Program::SpecializationLoader::specialize_int(const string &name, int value)
 722 {
 723         spec_values[name] = value;
 724 }
 725
 726 } // namespace GL
 727 } // namespace Msp