src/app/app.cpp

   1 #include "Application.hpp"
   2 #include "Assets.hpp"
   3 #include "State.hpp"
   4
   5 #include "init.hpp"
   6 #include "../graphics/Viewport.hpp"
   7 #include "../io/Token.hpp"
   8 #include "../io/TokenStreamReader.hpp"
   9
  10 #include <fstream>
  11 #include <SDL.h>
  12 #include <SDL_image.h>
  13
  14 using std::string;
  15
  16
  17 namespace blobs {
  18 namespace app {
  19
  20 Application::Application(Window &win, graphics::Viewport &vp)
  21 : window(win)
  22 , viewport(vp)
  23 , states() {
  24 }
  25
  26 Application::~Application() {
  27 }
  28
  29
  30 void Application::PushState(State *s) {
  31         s->app = this;
  32         if (!states.empty()) {
  33                 states.top()->OnPause();
  34         }
  35         states.emplace(s);
  36         ++s->ref_count;
  37         if (s->ref_count == 1) {
  38                 s->OnEnter();
  39         }
  40         s->OnResume();
  41 }
  42
  43 State *Application::PopState() {
  44         State *s = states.top();
  45         states.pop();
  46         s->OnPause();
  47         s->OnExit();
  48         if (!states.empty()) {
  49                 states.top()->OnResume();
  50         }
  51         return s;
  52 }
  53
  54 State *Application::SwitchState(State *s_new) {
  55         s_new->app = this;
  56         State *s_old = states.top();
  57         states.top() = s_new;
  58         --s_old->ref_count;
  59         ++s_new->ref_count;
  60         s_old->OnPause();
  61         if (s_old->ref_count == 0) {
  62                 s_old->OnExit();
  63         }
  64         if (s_new->ref_count == 1) {
  65                 s_new->OnEnter();
  66         }
  67         s_new->OnResume();
  68         return s_old;
  69 }
  70
  71 State &Application::GetState() {
  72         return *states.top();
  73 }
  74
  75 bool Application::HasState() const noexcept {
  76         return !states.empty();
  77 }
  78
  79
  80 void Application::Run() {
  81         Uint32 last = SDL_GetTicks();
  82         while (HasState()) {
  83                 Uint32 now = SDL_GetTicks();
  84                 int delta = now - last;
  85                 Loop(delta);
  86                 last = now;
  87         }
  88 }
  89
  90 void Application::Loop(int dt) {
  91         HandleEvents();
  92         if (!HasState()) return;
  93         GetState().Update(dt);
  94         if (!HasState()) return;
  95         viewport.Clear();
  96         GetState().Render(viewport);
  97         window.Flip();
  98 }
  99
 100 void Application::HandleEvents() {
 101         SDL_Event event;
 102         while (HasState() && SDL_PollEvent(&event)) {
 103                 if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_RESIZED) {
 104                         viewport.Resize(event.window.data1, event.window.data2);
 105                 }
 106                 GetState().Handle(event);
 107         }
 108 }
 109
 110 void State::Handle(const SDL_Event &event) {
 111         switch (event.type) {
 112                 case SDL_KEYDOWN:
 113                         OnKeyDown(event.key);
 114                         break;
 115                 case SDL_KEYUP:
 116                         OnKeyUp(event.key);
 117                         break;
 118                 case SDL_MOUSEBUTTONDOWN:
 119                         OnMouseDown(event.button);
 120                         break;
 121                 case SDL_MOUSEBUTTONUP:
 122                         OnMouseUp(event.button);
 123                         break;
 124                 case SDL_MOUSEMOTION:
 125                         OnMouseMotion(event.motion);
 126                         break;
 127                 case SDL_MOUSEWHEEL:
 128                         OnMouseWheel(event.wheel);
 129                         break;
 130                 case SDL_QUIT:
 131                         OnQuit();
 132                         break;
 133                 case SDL_WINDOWEVENT:
 134                         Handle(event.window);
 135                         break;
 136                 default:
 137                         // ignore
 138                         break;
 139         }
 140 }
 141
 142 void State::Handle(const SDL_WindowEvent &event) {
 143         switch (event.event) {
 144                 case SDL_WINDOWEVENT_FOCUS_GAINED:
 145                         OnFocus();
 146                         break;
 147                 case SDL_WINDOWEVENT_FOCUS_LOST:
 148                         OnBlur();
 149                         break;
 150                 case SDL_WINDOWEVENT_RESIZED:
 151                         OnResize(event.data1, event.data2);
 152                         break;
 153                 default:
 154                         break;
 155         }
 156 }
 157
 158 void State::Update(int dt) {
 159         OnUpdate(dt);
 160 }
 161
 162 void State::Render(graphics::Viewport &viewport) {
 163         OnRender(viewport);
 164 }
 165
 166 void State::OnQuit() {
 167         while (App().HasState()) {
 168                 App().PopState();
 169         }
 170 }
 171
 172
 173 Assets::Assets()
 174 : path("assets/")
 175 , data_path(path + "data/")
 176 , font_path(path + "fonts/")
 177 , skin_path(path + "skins/")
 178 , tile_path(path + "tiles/")
 179 , random(0)
 180 , fonts{
 181         graphics::Font(font_path + "DejaVuSans.ttf", 32),
 182         graphics::Font(font_path + "DejaVuSans.ttf", 24),
 183         graphics::Font(font_path + "DejaVuSans.ttf", 16)
 184 } {
 185         {
 186                 std::ifstream resource_file(data_path + "resources");
 187                 io::TokenStreamReader resource_reader(resource_file);
 188                 ReadResources(resource_reader);
 189         }
 190
 191         {
 192                 std::ifstream tile_file(data_path + "tile_types");
 193                 io::TokenStreamReader tile_reader(tile_file);
 194                 ReadTileTypes(tile_reader);
 195         }
 196
 197
 198         graphics::Format format;
 199         textures.tiles.Bind();
 200         textures.tiles.Reserve(256, 256, 14, format);
 201         LoadTileTexture("algae",    textures.tiles,  0);
 202         LoadTileTexture("desert",   textures.tiles,  1);
 203         LoadTileTexture("forest",   textures.tiles,  2);
 204         LoadTileTexture("grass",    textures.tiles,  3);
 205         LoadTileTexture("ice",      textures.tiles,  4);
 206         LoadTileTexture("jungle",   textures.tiles,  5);
 207         LoadTileTexture("mountain", textures.tiles,  6);
 208         LoadTileTexture("ocean",    textures.tiles,  7);
 209         LoadTileTexture("rock",     textures.tiles,  8);
 210         LoadTileTexture("sand",     textures.tiles,  9);
 211         LoadTileTexture("taiga",    textures.tiles, 10);
 212         LoadTileTexture("tundra",   textures.tiles, 11);
 213         LoadTileTexture("water",    textures.tiles, 12);
 214         LoadTileTexture("wheat",    textures.tiles, 13);
 215         textures.tiles.FilterTrilinear();
 216
 217         textures.skins.Bind();
 218         textures.skins.Reserve(256, 256, 9, format);
 219         LoadSkinTexture("1", textures.skins, 0);
 220         LoadSkinTexture("2", textures.skins, 1);
 221         LoadSkinTexture("3", textures.skins, 2);
 222         LoadSkinTexture("4", textures.skins, 3);
 223         LoadSkinTexture("5", textures.skins, 4);
 224         LoadSkinTexture("6", textures.skins, 5);
 225         LoadSkinTexture("7", textures.skins, 6);
 226         LoadSkinTexture("8", textures.skins, 7);
 227         LoadSkinTexture("9", textures.skins, 8);
 228         textures.skins.FilterTrilinear();
 229 }
 230
 231 Assets::~Assets() {
 232 }
 233
 234 void Assets::ReadResources(io::TokenStreamReader &in) {
 235         while (in.HasMore()) {
 236                 string name;
 237                 in.ReadIdentifier(name);
 238                 in.Skip(io::Token::EQUALS);
 239
 240                 int id = 0;
 241                 if (data.resources.Has(name)) {
 242                         id = data.resources[name].id;
 243                 } else {
 244                         world::Resource res;
 245                         res.name = name;
 246                         id = data.resources.Add(res);
 247                 }
 248
 249                 in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 250                 while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 251                         in.ReadIdentifier(name);
 252                         in.Skip(io::Token::EQUALS);
 253                         if (name == "label") {
 254                                 in.ReadString(data.resources[id].label);
 255                         } else if (name == "density") {
 256                                 data.resources[id].density = in.GetDouble();
 257                         } else if (name == "state") {
 258                                 in.ReadIdentifier(name);
 259                                 if (name == "solid") {
 260                                         data.resources[id].state = world::Resource::SOLID;
 261                                 } else if (name == "liquid") {
 262                                         data.resources[id].state = world::Resource::LIQUID;
 263                                 } else if (name == "gas") {
 264                                         data.resources[id].state = world::Resource::GAS;
 265                                 } else if (name == "plasma") {
 266                                         data.resources[id].state = world::Resource::PLASMA;
 267                                 } else {
 268                                         throw std::runtime_error("unknown resource state '" + name + "'");
 269                                 }
 270                         } else {
 271                                 throw std::runtime_error("unknown resource property '" + name + "'");
 272                         }
 273                         in.Skip(io::Token::SEMICOLON);
 274                 }
 275                 in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 276                 in.Skip(io::Token::SEMICOLON);
 277         }
 278 }
 279
 280 void Assets::ReadTileTypes(io::TokenStreamReader &in) {
 281         while (in.HasMore()) {
 282                 string name;
 283                 in.ReadIdentifier(name);
 284                 in.Skip(io::Token::EQUALS);
 285
 286                 int id = 0;
 287                 if (data.tile_types.Has(name)) {
 288                         id = data.tile_types[name].id;
 289                 } else {
 290                         world::TileType type;
 291                         type.name = name;
 292                         id = data.tile_types.Add(type);
 293                 }
 294
 295                 in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 296                 while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 297                         in.ReadIdentifier(name);
 298                         in.Skip(io::Token::EQUALS);
 299                         if (name == "label") {
 300                                 in.ReadString(data.tile_types[id].label);
 301                         } else if (name == "texture") {
 302                                 data.tile_types[id].texture = in.GetInt();
 303                         } else if (name == "yield") {
 304                                 in.Skip(io::Token::BRACKET_OPEN);
 305                                 while (in.Peek().type != io::Token::BRACKET_CLOSE) {
 306                                         world::TileType::Yield yield;
 307                                         in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 308                                         while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 309                                                 in.ReadIdentifier(name);
 310                                                 in.Skip(io::Token::EQUALS);
 311                                                 if (name == "resource") {
 312                                                         in.ReadIdentifier(name);
 313                                                         yield.resource = data.resources[name].id;
 314                                                 } else if (name == "ubiquity") {
 315                                                         yield.ubiquity = in.GetDouble();
 316                                                 } else {
 317                                                         throw std::runtime_error("unknown tile type yield property '" + name + "'");
 318                                                 }
 319                                                 in.Skip(io::Token::SEMICOLON);
 320                                         }
 321                                         in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 322                                         data.tile_types[id].resources.push_back(yield);
 323                                         if (in.Peek().type == io::Token::COMMA) {
 324                                                 in.Skip(io::Token::COMMA);
 325                                         }
 326                                 }
 327                                 in.Skip(io::Token::BRACKET_CLOSE);
 328                         } else {
 329                                 throw std::runtime_error("unknown tile type property '" + name + "'");
 330                         }
 331                         in.Skip(io::Token::SEMICOLON);
 332                 }
 333                 in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 334                 in.Skip(io::Token::SEMICOLON);
 335         }
 336 }
 337
 338 void Assets::LoadTileTexture(const string &name, graphics::ArrayTexture &tex, int layer) const {
 339         string path = tile_path + name + ".png";
 340         SDL_Surface *srf = IMG_Load(path.c_str());
 341         if (!srf) {
 342                 throw SDLError("IMG_Load");
 343         }
 344         try {
 345                 tex.Data(layer, *srf);
 346         } catch (...) {
 347                 SDL_FreeSurface(srf);
 348                 throw;
 349         }
 350         SDL_FreeSurface(srf);
 351 }
 352
 353 void Assets::LoadSkinTexture(const string &name, graphics::ArrayTexture &tex, int layer) const {
 354         string path = skin_path + name + ".png";
 355         SDL_Surface *srf = IMG_Load(path.c_str());
 356         if (!srf) {
 357                 throw SDLError("IMG_Load");
 358         }
 359         try {
 360                 tex.Data(layer, *srf);
 361         } catch (...) {
 362                 SDL_FreeSurface(srf);
 363                 throw;
 364         }
 365         SDL_FreeSurface(srf);
 366 }
 367
 368 }
 369 }