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