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 , fonts{
 180         graphics::Font(font_path + "DejaVuSans.ttf", 32),
 181         graphics::Font(font_path + "DejaVuSans.ttf", 24),
 182         graphics::Font(font_path + "DejaVuSans.ttf", 16)
 183 } {
 184         {
 185                 std::ifstream resource_file(data_path + "resources");
 186                 io::TokenStreamReader resource_reader(resource_file);
 187                 ReadResources(resource_reader);
 188         }
 189
 190         {
 191                 std::ifstream tile_file(data_path + "tile_types");
 192                 io::TokenStreamReader tile_reader(tile_file);
 193                 ReadTileTypes(tile_reader);
 194         }
 195
 196
 197         graphics::Format format;
 198         textures.tiles.Bind();
 199         textures.tiles.Reserve(256, 256, 14, format);
 200         LoadTileTexture("algae",    textures.tiles,  0);
 201         LoadTileTexture("desert",   textures.tiles,  1);
 202         LoadTileTexture("forest",   textures.tiles,  2);
 203         LoadTileTexture("grass",    textures.tiles,  3);
 204         LoadTileTexture("ice",      textures.tiles,  4);
 205         LoadTileTexture("jungle",   textures.tiles,  5);
 206         LoadTileTexture("mountain", textures.tiles,  6);
 207         LoadTileTexture("ocean",    textures.tiles,  7);
 208         LoadTileTexture("rock",     textures.tiles,  8);
 209         LoadTileTexture("sand",     textures.tiles,  9);
 210         LoadTileTexture("taiga",    textures.tiles, 10);
 211         LoadTileTexture("tundra",   textures.tiles, 11);
 212         LoadTileTexture("water",    textures.tiles, 12);
 213         LoadTileTexture("wheat",    textures.tiles, 13);
 214
 215         textures.skins.Bind();
 216         textures.skins.Reserve(256, 256, 9, format);
 217         LoadSkinTexture("1", textures.skins, 0);
 218         LoadSkinTexture("2", textures.skins, 1);
 219         LoadSkinTexture("3", textures.skins, 2);
 220         LoadSkinTexture("4", textures.skins, 3);
 221         LoadSkinTexture("5", textures.skins, 4);
 222         LoadSkinTexture("6", textures.skins, 5);
 223         LoadSkinTexture("7", textures.skins, 6);
 224         LoadSkinTexture("8", textures.skins, 7);
 225         LoadSkinTexture("9", textures.skins, 8);
 226 }
 227
 228 Assets::~Assets() {
 229 }
 230
 231 void Assets::ReadResources(io::TokenStreamReader &in) {
 232         while (in.HasMore()) {
 233                 string name;
 234                 in.ReadIdentifier(name);
 235                 in.Skip(io::Token::EQUALS);
 236
 237                 int id = 0;
 238                 if (data.resources.Has(name)) {
 239                         id = data.resources[name].id;
 240                 } else {
 241                         world::Resource res;
 242                         res.name = name;
 243                         id = data.resources.Add(res);
 244                 }
 245
 246                 in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 247                 while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 248                         in.ReadIdentifier(name);
 249                         in.Skip(io::Token::EQUALS);
 250                         if (name == "label") {
 251                                 in.ReadString(data.resources[id].label);
 252                         } else if (name == "state") {
 253                                 in.ReadIdentifier(name);
 254                                 if (name == "solid") {
 255                                         data.resources[id].state = world::Resource::SOLID;
 256                                 } else if (name == "liquid") {
 257                                         data.resources[id].state = world::Resource::LIQUID;
 258                                 } else if (name == "gas") {
 259                                         data.resources[id].state = world::Resource::GAS;
 260                                 } else if (name == "plasma") {
 261                                         data.resources[id].state = world::Resource::PLASMA;
 262                                 } else {
 263                                         throw std::runtime_error("unknown resource state '" + name + "'");
 264                                 }
 265                         } else {
 266                                 throw std::runtime_error("unknown resource property '" + name + "'");
 267                         }
 268                         in.Skip(io::Token::SEMICOLON);
 269                 }
 270                 in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 271                 in.Skip(io::Token::SEMICOLON);
 272         }
 273 }
 274
 275 void Assets::ReadTileTypes(io::TokenStreamReader &in) {
 276         while (in.HasMore()) {
 277                 string name;
 278                 in.ReadIdentifier(name);
 279                 in.Skip(io::Token::EQUALS);
 280
 281                 int id = 0;
 282                 if (data.tile_types.Has(name)) {
 283                         id = data.tile_types[name].id;
 284                 } else {
 285                         world::TileType type;
 286                         type.name = name;
 287                         id = data.tile_types.Add(type);
 288                 }
 289
 290                 in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 291                 while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 292                         in.ReadIdentifier(name);
 293                         in.Skip(io::Token::EQUALS);
 294                         if (name == "label") {
 295                                 in.ReadString(data.tile_types[id].label);
 296                         } else if (name == "texture") {
 297                                 data.tile_types[id].texture = in.GetInt();
 298                         } else if (name == "yield") {
 299                                 in.Skip(io::Token::BRACKET_OPEN);
 300                                 while (in.Peek().type != io::Token::BRACKET_CLOSE) {
 301                                         world::TileType::Yield yield;
 302                                         in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 303                                         while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 304                                                 in.ReadIdentifier(name);
 305                                                 in.Skip(io::Token::EQUALS);
 306                                                 if (name == "resource") {
 307                                                         in.ReadIdentifier(name);
 308                                                         yield.resource = data.resources[name].id;
 309                                                 } else if (name == "ubiquity") {
 310                                                         yield.ubiquity = in.GetDouble();
 311                                                 } else {
 312                                                         throw std::runtime_error("unknown tile type yield property '" + name + "'");
 313                                                 }
 314                                                 in.Skip(io::Token::SEMICOLON);
 315                                         }
 316                                         in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 317                                         data.tile_types[id].resources.push_back(yield);
 318                                         if (in.Peek().type == io::Token::COMMA) {
 319                                                 in.Skip(io::Token::COMMA);
 320                                         }
 321                                 }
 322                                 in.Skip(io::Token::BRACKET_CLOSE);
 323                         } else {
 324                                 throw std::runtime_error("unknown tile type property '" + name + "'");
 325                         }
 326                         in.Skip(io::Token::SEMICOLON);
 327                 }
 328                 in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 329                 in.Skip(io::Token::SEMICOLON);
 330         }
 331 }
 332
 333 void Assets::LoadTileTexture(const string &name, graphics::ArrayTexture &tex, int layer) const {
 334         string path = tile_path + name + ".png";
 335         SDL_Surface *srf = IMG_Load(path.c_str());
 336         if (!srf) {
 337                 throw SDLError("IMG_Load");
 338         }
 339         try {
 340                 tex.Data(layer, *srf);
 341         } catch (...) {
 342                 SDL_FreeSurface(srf);
 343                 throw;
 344         }
 345         SDL_FreeSurface(srf);
 346 }
 347
 348 void Assets::LoadSkinTexture(const string &name, graphics::ArrayTexture &tex, int layer) const {
 349         string path = skin_path + name + ".png";
 350         SDL_Surface *srf = IMG_Load(path.c_str());
 351         if (!srf) {
 352                 throw SDLError("IMG_Load");
 353         }
 354         try {
 355                 tex.Data(layer, *srf);
 356         } catch (...) {
 357                 SDL_FreeSurface(srf);
 358                 throw;
 359         }
 360         SDL_FreeSurface(srf);
 361 }
 362
 363 }
 364 }