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