src/app/app.cpp

   1 #include "Application.hpp"
   2 #include "Assets.hpp"
   3 #include "Environment.hpp"
   4 #include "FrameCounter.hpp"
   5 #include "State.hpp"
   6 #include "StateControl.hpp"
   7
   8 #include "init.hpp"
   9 #include "../audio/Sound.hpp"
  10 #include "../graphics/ArrayTexture.hpp"
  11 #include "../graphics/CubeMap.hpp"
  12 #include "../graphics/Font.hpp"
  13 #include "../graphics/Texture.hpp"
  14 #include "../io/TokenStreamReader.hpp"
  15 #include "../model/bounds.hpp"
  16 #include "../model/Model.hpp"
  17 #include "../model/ModelRegistry.hpp"
  18 #include "../model/Shape.hpp"
  19 #include "../model/ShapeRegistry.hpp"
  20 #include "../shared/ResourceIndex.hpp"
  21 #include "../world/BlockType.hpp"
  22 #include "../world/BlockTypeRegistry.hpp"
  23 #include "../world/Entity.hpp"
  24
  25 #include <fstream>
  26 #include <iomanip>
  27 #include <iostream>
  28 #include <stdexcept>
  29 #include <SDL_image.h>
  30
  31 using std::runtime_error;
  32 using std::string;
  33
  34
  35 namespace blank {
  36
  37 HeadlessApplication::HeadlessApplication(HeadlessEnvironment &e)
  38 : env(e)
  39 , states() {
  40
  41 }
  42
  43 HeadlessApplication::~HeadlessApplication() {
  44
  45 }
  46
  47
  48 Application::Application(Environment &e)
  49 : HeadlessApplication(e)
  50 , env(e) {
  51
  52 }
  53
  54 Application::~Application() {
  55         env.audio.StopAll();
  56 }
  57
  58
  59 void HeadlessApplication::RunN(size_t n) {
  60         Uint32 last = SDL_GetTicks();
  61         for (size_t i = 0; HasState() && i < n; ++i) {
  62                 Uint32 now = SDL_GetTicks();
  63                 int delta = now - last;
  64                 Loop(delta);
  65                 last = now;
  66         }
  67 }
  68
  69 void HeadlessApplication::RunT(size_t t) {
  70         Uint32 last = SDL_GetTicks();
  71         Uint32 finish = last + t;
  72         while (HasState() && last < finish) {
  73                 Uint32 now = SDL_GetTicks();
  74                 int delta = now - last;
  75                 Loop(delta);
  76                 last = now;
  77         }
  78 }
  79
  80 void HeadlessApplication::RunS(size_t n, size_t t) {
  81         for (size_t i = 0; HasState() && i < n; ++i) {
  82                 Loop(t);
  83                 std::cout << '.';
  84                 if (i % 16 == 15) {
  85                         std::cout << std::setfill(' ') << std::setw(5) << std::right << (i + 1) << std::endl;
  86                 } else {
  87                         std::cout << std::flush;
  88                 }
  89         }
  90 }
  91
  92
  93 void HeadlessApplication::Run() {
  94         Uint32 last = SDL_GetTicks();
  95         while (HasState()) {
  96                 Uint32 now = SDL_GetTicks();
  97                 int delta = now - last;
  98                 Loop(delta);
  99                 last = now;
 100         }
 101 }
 102
 103 void HeadlessApplication::Loop(int dt) {
 104         env.counter.EnterFrame();
 105         HandleEvents();
 106         if (!HasState()) return;
 107         Update(dt);
 108         CommitStates();
 109         if (!HasState()) return;
 110         env.counter.ExitFrame();
 111 }
 112
 113 void Application::Loop(int dt) {
 114         env.counter.EnterFrame();
 115         HandleEvents();
 116         if (!HasState()) return;
 117         Update(dt);
 118         CommitStates();
 119         if (!HasState()) return;
 120         Render();
 121         env.counter.ExitFrame();
 122 }
 123
 124
 125 void HeadlessApplication::HandleEvents() {
 126         env.counter.EnterHandle();
 127         SDL_Event event;
 128         while (HasState() && SDL_PollEvent(&event)) {
 129                 Handle(event);
 130                 CommitStates();
 131         }
 132         env.counter.ExitHandle();
 133 }
 134
 135 void HeadlessApplication::Handle(const SDL_Event &event) {
 136         GetState().Handle(event);
 137 }
 138
 139
 140 void Application::HandleEvents() {
 141         env.counter.EnterHandle();
 142         SDL_Event event;
 143         while (HasState() && SDL_PollEvent(&event)) {
 144                 Handle(event);
 145                 CommitStates();
 146         }
 147         env.counter.ExitHandle();
 148 }
 149
 150 void Application::Handle(const SDL_Event &event) {
 151         switch (event.type) {
 152                 case SDL_WINDOWEVENT:
 153                         Handle(event.window);
 154                         break;
 155                 default:
 156                         GetState().Handle(event);
 157                         break;
 158         }
 159 }
 160
 161 void Application::Handle(const SDL_WindowEvent &event) {
 162         switch (event.event) {
 163                 case SDL_WINDOWEVENT_FOCUS_GAINED:
 164                         env.window.GrabMouse();
 165                         break;
 166                 case SDL_WINDOWEVENT_FOCUS_LOST:
 167                         env.window.ReleaseMouse();
 168                         break;
 169                 case SDL_WINDOWEVENT_RESIZED:
 170                         env.viewport.Resize(event.data1, event.data2);
 171                         break;
 172                 default:
 173                         break;
 174         }
 175 }
 176
 177 void HeadlessApplication::Update(int dt) {
 178         env.counter.EnterUpdate();
 179         if (HasState()) {
 180                 GetState().Update(dt);
 181         }
 182         env.counter.ExitUpdate();
 183 }
 184
 185 void Application::Update(int dt) {
 186         env.counter.EnterUpdate();
 187         env.audio.Update(dt);
 188         if (HasState()) {
 189                 GetState().Update(dt);
 190         }
 191         env.counter.ExitUpdate();
 192 }
 193
 194 void Application::Render() {
 195         // gl implementation may (and will probably) delay vsync blocking until
 196         // the first write after flipping, which is this clear call
 197         env.viewport.Clear();
 198         env.counter.EnterRender();
 199
 200         if (HasState()) {
 201                 GetState().Render(env.viewport);
 202         }
 203
 204         env.counter.ExitRender();
 205         env.window.Flip();
 206 }
 207
 208
 209 void HeadlessApplication::PushState(State *s) {
 210         if (!states.empty()) {
 211                 states.top()->OnPause();
 212         }
 213         states.emplace(s);
 214         ++s->ref_count;
 215         if (s->ref_count == 1) {
 216                 s->OnEnter();
 217         }
 218         s->OnResume();
 219 }
 220
 221 State *HeadlessApplication::PopState() {
 222         State *s = states.top();
 223         states.pop();
 224         s->OnPause();
 225         s->OnExit();
 226         if (!states.empty()) {
 227                 states.top()->OnResume();
 228         }
 229         return s;
 230 }
 231
 232 State *HeadlessApplication::SwitchState(State *s_new) {
 233         State *s_old = states.top();
 234         states.top() = s_new;
 235         --s_old->ref_count;
 236         ++s_new->ref_count;
 237         s_old->OnPause();
 238         if (s_old->ref_count == 0) {
 239                 s_old->OnExit();
 240         }
 241         if (s_new->ref_count == 1) {
 242                 s_new->OnEnter();
 243         }
 244         s_new->OnResume();
 245         return s_old;
 246 }
 247
 248 State &HeadlessApplication::GetState() {
 249         return *states.top();
 250 }
 251
 252 void HeadlessApplication::CommitStates() {
 253         env.state.Commit(*this);
 254 }
 255
 256 bool HeadlessApplication::HasState() const noexcept {
 257         return !states.empty();
 258 }
 259
 260
 261 void StateControl::Commit(HeadlessApplication &app) {
 262         while (!cue.empty()) {
 263                 Memo m(cue.front());
 264                 cue.pop();
 265                 switch (m.cmd) {
 266                         case PUSH:
 267                                 app.PushState(m.state);
 268                                 break;
 269                         case SWITCH:
 270                                 app.SwitchState(m.state);
 271                                 break;
 272                         case POP:
 273                                 app.PopState();
 274                                 break;
 275                         case POP_ALL:
 276                                 while (app.HasState()) {
 277                                         app.PopState();
 278                                 }
 279                                 break;
 280                         case POP_AFTER:
 281                                 while (app.HasState() && &app.GetState() != m.state) {
 282                                         app.PopState();
 283                                 }
 284                                 break;
 285                         case POP_UNTIL:
 286                                 while (app.HasState()) {
 287                                         if (app.PopState() == m.state) {
 288                                                 break;
 289                                         }
 290                                 }
 291                 }
 292         }
 293 }
 294
 295
 296 AssetLoader::AssetLoader(const string &base)
 297 : fonts(base + "fonts/")
 298 , sounds(base + "sounds/")
 299 , textures(base + "textures/")
 300 , data(base + "data/") {
 301
 302 }
 303
 304 Assets::Assets(const AssetLoader &loader)
 305 : large_ui_font(loader.LoadFont("DejaVuSans", 24))
 306 , small_ui_font(loader.LoadFont("DejaVuSans", 16)) {
 307
 308 }
 309
 310 namespace {
 311
 312 CuboidBounds block_shape({{ -0.5f, -0.5f, -0.5f }, { 0.5f, 0.5f, 0.5f }});
 313 StairBounds stair_shape({{ -0.5f, -0.5f, -0.5f }, { 0.5f, 0.5f, 0.5f }}, { 0.0f, 0.0f });
 314 CuboidBounds slab_shape({{ -0.5f, -0.5f, -0.5f }, { 0.5f, 0.0f, 0.5f }});
 315
 316 }
 317
 318 void AssetLoader::LoadBlockTypes(
 319         const string &set_name,
 320         BlockTypeRegistry &reg,
 321         ResourceIndex &tex_index,
 322         const ShapeRegistry &shapes
 323 ) const {
 324         string full = data + set_name + ".types";
 325         std::ifstream file(full);
 326         if (!file) {
 327                 throw std::runtime_error("failed to open block type file " + full);
 328         }
 329         TokenStreamReader in(file);
 330         string type_name;
 331         string name;
 332         string tex_name;
 333         string shape_name;
 334         while (in.HasMore()) {
 335                 in.ReadIdentifier(type_name);
 336                 in.Skip(Token::EQUALS);
 337                 BlockType type;
 338
 339                 // read block type
 340                 in.Skip(Token::ANGLE_BRACKET_OPEN);
 341                 while (in.Peek().type != Token::ANGLE_BRACKET_CLOSE) {
 342                         in.ReadIdentifier(name);
 343                         in.Skip(Token::EQUALS);
 344                         if (name == "visible") {
 345                                 type.visible = in.GetBool();
 346                         } else if (name == "texture") {
 347                                 in.ReadString(tex_name);
 348                                 type.textures.push_back(tex_index.GetID(tex_name));
 349                         } else if (name == "textures") {
 350                                 in.Skip(Token::BRACKET_OPEN);
 351                                 while (in.Peek().type != Token::BRACKET_CLOSE) {
 352                                         in.ReadString(tex_name);
 353                                         type.textures.push_back(tex_index.GetID(tex_name));
 354                                         if (in.Peek().type == Token::COMMA) {
 355                                                 in.Skip(Token::COMMA);
 356                                         }
 357                                 }
 358                                 in.Skip(Token::BRACKET_CLOSE);
 359                         } else if (name == "rgb_mod") {
 360                                 in.ReadVec(type.rgb_mod);
 361                         } else if (name == "hsl_mod") {
 362                                 in.ReadVec(type.hsl_mod);
 363                         } else if (name == "outline") {
 364                                 in.ReadVec(type.outline_color);
 365                         } else if (name == "label") {
 366                                 in.ReadString(type.label);
 367                         } else if (name == "luminosity") {
 368                                 type.luminosity = in.GetInt();
 369                         } else if (name == "block_light") {
 370                                 type.block_light = in.GetBool();
 371                         } else if (name == "collision") {
 372                                 type.collision = in.GetBool();
 373                         } else if (name == "collide_block") {
 374                                 type.collide_block = in.GetBool();
 375                         } else if (name == "generate") {
 376                                 type.generate = in.GetBool();
 377                         } else if (name == "min_solidity") {
 378                                 type.min_solidity = in.GetFloat();
 379                         } else if (name == "mid_solidity") {
 380                                 type.mid_solidity = in.GetFloat();
 381                         } else if (name == "max_solidity") {
 382                                 type.max_solidity = in.GetFloat();
 383                         } else if (name == "min_humidity") {
 384                                 type.min_humidity = in.GetFloat();
 385                         } else if (name == "mid_humidity") {
 386                                 type.mid_humidity = in.GetFloat();
 387                         } else if (name == "max_humidity") {
 388                                 type.max_humidity = in.GetFloat();
 389                         } else if (name == "min_temperature") {
 390                                 type.min_temperature = in.GetFloat();
 391                         } else if (name == "mid_temperature") {
 392                                 type.mid_temperature = in.GetFloat();
 393                         } else if (name == "max_temperature") {
 394                                 type.max_temperature = in.GetFloat();
 395                         } else if (name == "min_richness") {
 396                                 type.min_richness = in.GetFloat();
 397                         } else if (name == "mid_richness") {
 398                                 type.mid_richness = in.GetFloat();
 399                         } else if (name == "max_richness") {
 400                                 type.max_richness = in.GetFloat();
 401                         } else if (name == "commonness") {
 402                                 type.commonness = in.GetFloat();
 403                         } else if (name == "shape") {
 404                                 in.ReadIdentifier(shape_name);
 405                                 type.shape = &shapes.Get(shape_name);
 406                         } else {
 407                                 std::cerr << "warning: unknown block type property " << name << std::endl;
 408                                 while (in.Peek().type != Token::SEMICOLON) {
 409                                         in.Next();
 410                                 }
 411                         }
 412                         in.Skip(Token::SEMICOLON);
 413                 }
 414                 in.Skip(Token::ANGLE_BRACKET_CLOSE);
 415                 in.Skip(Token::SEMICOLON);
 416
 417                 reg.Add(type);
 418         }
 419 }
 420
 421 CubeMap AssetLoader::LoadCubeMap(const string &name) const {
 422         string full = textures + name;
 423         string right = full + "-right.png";
 424         string left = full + "-left.png";
 425         string top = full + "-top.png";
 426         string bottom = full + "-bottom.png";
 427         string back = full + "-back.png";
 428         string front = full + "-front.png";
 429
 430         CubeMap cm;
 431         cm.Bind();
 432         SDL_Surface *srf;
 433
 434         if (!(srf = IMG_Load(right.c_str()))) throw SDLError("IMG_Load");
 435         try {
 436                 cm.Data(CubeMap::RIGHT, *srf);
 437         } catch (...) {
 438                 SDL_FreeSurface(srf);
 439                 throw;
 440         }
 441         SDL_FreeSurface(srf);
 442
 443         if (!(srf = IMG_Load(left.c_str()))) throw SDLError("IMG_Load");
 444         try {
 445                 cm.Data(CubeMap::LEFT, *srf);
 446         } catch (...) {
 447                 SDL_FreeSurface(srf);
 448                 throw;
 449         }
 450         SDL_FreeSurface(srf);
 451
 452         if (!(srf = IMG_Load(top.c_str()))) throw SDLError("IMG_Load");
 453         try {
 454                 cm.Data(CubeMap::TOP, *srf);
 455         } catch (...) {
 456                 SDL_FreeSurface(srf);
 457                 throw;
 458         }
 459         SDL_FreeSurface(srf);
 460
 461         if (!(srf = IMG_Load(bottom.c_str()))) throw SDLError("IMG_Load");
 462         try {
 463                 cm.Data(CubeMap::BOTTOM, *srf);
 464         } catch (...) {
 465                 SDL_FreeSurface(srf);
 466                 throw;
 467         }
 468         SDL_FreeSurface(srf);
 469
 470         if (!(srf = IMG_Load(back.c_str()))) throw SDLError("IMG_Load");
 471         try {
 472                 cm.Data(CubeMap::BACK, *srf);
 473         } catch (...) {
 474                 SDL_FreeSurface(srf);
 475                 throw;
 476         }
 477         SDL_FreeSurface(srf);
 478
 479         if (!(srf = IMG_Load(front.c_str()))) throw SDLError("IMG_Load");
 480         try {
 481                 cm.Data(CubeMap::FRONT, *srf);
 482         } catch (...) {
 483                 SDL_FreeSurface(srf);
 484                 throw;
 485         }
 486         SDL_FreeSurface(srf);
 487
 488         cm.FilterNearest();
 489         cm.WrapEdge();
 490
 491         return cm;
 492 }
 493
 494 Font AssetLoader::LoadFont(const string &name, int size) const {
 495         string full = fonts + name + ".ttf";
 496         return Font(full.c_str(), size);
 497 }
 498
 499 void AssetLoader::LoadModels(
 500         const string &set_name,
 501         ModelRegistry &models,
 502         ResourceIndex &tex_index,
 503         const ShapeRegistry &shapes
 504 ) const {
 505         string full = data + set_name + ".models";
 506         std::ifstream file(full);
 507         if (!file) {
 508                 throw std::runtime_error("failed to open model file " + full);
 509         }
 510         TokenStreamReader in(file);
 511         string model_name;
 512         string prop_name;
 513         while (in.HasMore()) {
 514                 in.ReadIdentifier(model_name);
 515                 in.Skip(Token::EQUALS);
 516                 in.Skip(Token::ANGLE_BRACKET_OPEN);
 517                 Model &model = models.Add(model_name);
 518                 while (in.HasMore() && in.Peek().type != Token::ANGLE_BRACKET_CLOSE) {
 519                         in.ReadIdentifier(prop_name);
 520                         in.Skip(Token::EQUALS);
 521                         if (prop_name == "root") {
 522                                 model.RootPart().Read(in, tex_index, shapes);
 523                         } else {
 524                                 while (in.HasMore() && in.Peek().type != Token::SEMICOLON) {
 525                                         in.Next();
 526                                 }
 527                         }
 528                         in.Skip(Token::SEMICOLON);
 529                 }
 530                 model.Enumerate();
 531                 in.Skip(Token::ANGLE_BRACKET_CLOSE);
 532                 in.Skip(Token::SEMICOLON);
 533         }
 534 }
 535
 536 void AssetLoader::LoadShapes(const string &set_name, ShapeRegistry &shapes) const {
 537         string full = data + set_name + ".shapes";
 538         std::ifstream file(full);
 539         if (!file) {
 540                 throw std::runtime_error("failed to open shape file " + full);
 541         }
 542         TokenStreamReader in(file);
 543         string shape_name;
 544         while (in.HasMore()) {
 545                 in.ReadIdentifier(shape_name);
 546                 in.Skip(Token::EQUALS);
 547                 Shape &shape = shapes.Add(shape_name);
 548                 shape.Read(in);
 549                 in.Skip(Token::SEMICOLON);
 550         }
 551 }
 552
 553 Sound AssetLoader::LoadSound(const string &name) const {
 554         string full = sounds + name + ".wav";
 555         return Sound(full.c_str());
 556 }
 557
 558 Texture AssetLoader::LoadTexture(const string &name) const {
 559         string full = textures + name + ".png";
 560         Texture tex;
 561         SDL_Surface *srf = IMG_Load(full.c_str());
 562         if (!srf) {
 563                 throw SDLError("IMG_Load");
 564         }
 565         tex.Bind();
 566         tex.Data(*srf);
 567         SDL_FreeSurface(srf);
 568         return tex;
 569 }
 570
 571 void AssetLoader::LoadTexture(const string &name, ArrayTexture &tex, int layer) const {
 572         string full = textures + name + ".png";
 573         SDL_Surface *srf = IMG_Load(full.c_str());
 574         if (!srf) {
 575                 throw SDLError("IMG_Load");
 576         }
 577         tex.Bind();
 578         try {
 579                 tex.Data(layer, *srf);
 580         } catch (...) {
 581                 SDL_FreeSurface(srf);
 582                 throw;
 583         }
 584         SDL_FreeSurface(srf);
 585 }
 586
 587 void AssetLoader::LoadTextures(const ResourceIndex &index, ArrayTexture &tex) const {
 588         // TODO: where the hell should that size come from?
 589         tex.Reserve(16, 16, index.Size(), Format());
 590         for (const auto &entry : index.Entries()) {
 591                 LoadTexture(entry.first, tex, entry.second);
 592         }
 593 }
 594
 595
 596 void FrameCounter::EnterFrame() noexcept {
 597         last_enter = SDL_GetTicks();
 598         last_tick = last_enter;
 599 }
 600
 601 void FrameCounter::EnterHandle() noexcept {
 602         Tick();
 603 }
 604
 605 void FrameCounter::ExitHandle() noexcept {
 606         current.handle = Tick();
 607 }
 608
 609 void FrameCounter::EnterUpdate() noexcept {
 610         Tick();
 611 }
 612
 613 void FrameCounter::ExitUpdate() noexcept {
 614         current.update = Tick();
 615 }
 616
 617 void FrameCounter::EnterRender() noexcept {
 618         Tick();
 619 }
 620
 621 void FrameCounter::ExitRender() noexcept {
 622         current.render = Tick();
 623 }
 624
 625 void FrameCounter::ExitFrame() noexcept {
 626         Uint32 now = SDL_GetTicks();
 627         current.total = now - last_enter;
 628         current.running = current.handle + current.update + current.render;
 629         current.waiting = current.total - current.running;
 630         Accumulate();
 631
 632         ++cur_frame;
 633         if (cur_frame >= NUM_FRAMES) {
 634                 Push();
 635                 cur_frame = 0;
 636                 changed = true;
 637         } else {
 638                 changed = false;
 639         }
 640 }
 641
 642 int FrameCounter::Tick() noexcept {
 643         Uint32 now = SDL_GetTicks();
 644         int delta = now - last_tick;
 645         last_tick = now;
 646         return delta;
 647 }
 648
 649 void FrameCounter::Accumulate() noexcept {
 650         sum.handle += current.handle;
 651         sum.update += current.update;
 652         sum.render += current.render;
 653         sum.running += current.running;
 654         sum.waiting += current.waiting;
 655         sum.total += current.total;
 656
 657         max.handle = std::max(current.handle, max.handle);
 658         max.update = std::max(current.update, max.update);
 659         max.render = std::max(current.render, max.render);
 660         max.running = std::max(current.running, max.running);
 661         max.waiting = std::max(current.waiting, max.waiting);
 662         max.total = std::max(current.total, max.total);
 663
 664         current = Frame<int>();
 665 }
 666
 667 void FrameCounter::Push() noexcept {
 668         peak = max;
 669         avg.handle = sum.handle * factor;
 670         avg.update = sum.update * factor;
 671         avg.render = sum.render * factor;
 672         avg.running = sum.running * factor;
 673         avg.waiting = sum.waiting * factor;
 674         avg.total = sum.total * factor;
 675
 676         sum = Frame<int>();
 677         max = Frame<int>();
 678 }
 679
 680 }