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 , skin_path(path + "skins/")
 177 , tile_path(path + "tiles/") {
 178         data.resources.Add({ "air", "Air", 0 });
 179         data.resources.Add({ "biomass", "Biomass", 0 });
 180         data.resources.Add({ "dirt", "Dirt", 0 });
 181         data.resources.Add({ "ice", "Ice", 0 });
 182         data.resources.Add({ "rock", "Rock", 0 });
 183         data.resources.Add({ "sand", "Sand", 0 });
 184         data.resources.Add({ "water", "Water", 0 });
 185         data.resources.Add({ "wood", "Wood", 0 });
 186
 187         {
 188                 std::ifstream tile_file(data_path + "tiles");
 189                 io::TokenStreamReader tile_reader(tile_file);
 190                 ReadTileTypes(tile_reader);
 191         }
 192
 193         data.tiles["algae"]   .resources.push_back({ data.resources["water"].id,   1.0  });
 194         data.tiles["algae"]   .resources.push_back({ data.resources["biomass"].id, 0.5  });
 195         data.tiles["desert"]  .resources.push_back({ data.resources["sand"].id,    1.0  });
 196         data.tiles["forest"]  .resources.push_back({ data.resources["wood"].id,    1.0  });
 197         data.tiles["forest"]  .resources.push_back({ data.resources["dirt"].id,    0.5  });
 198         data.tiles["grass"]   .resources.push_back({ data.resources["dirt"].id,    0.5  });
 199         data.tiles["grass"]   .resources.push_back({ data.resources["biomass"].id, 0.25 });
 200         data.tiles["grass"]   .resources.push_back({ data.resources["water"].id,   0.25 });
 201         data.tiles["ice"]     .resources.push_back({ data.resources["ice"].id,     1.0  });
 202         data.tiles["ice"]     .resources.push_back({ data.resources["water"].id,   0.25 });
 203         data.tiles["jungle"]  .resources.push_back({ data.resources["wood"].id,    0.5  });
 204         data.tiles["jungle"]  .resources.push_back({ data.resources["biomass"].id, 0.5  });
 205         data.tiles["mountain"].resources.push_back({ data.resources["rock"].id,    1.0  });
 206         data.tiles["ocean"]   .resources.push_back({ data.resources["water"].id,   1.0  });
 207         data.tiles["rock"]    .resources.push_back({ data.resources["rock"].id,    1.0  });
 208         data.tiles["sand"]    .resources.push_back({ data.resources["sand"].id,    1.0  });
 209         data.tiles["taiga"]   .resources.push_back({ data.resources["wood"].id,    1.0  });
 210         data.tiles["taiga"]   .resources.push_back({ data.resources["water"].id,   0.5  });
 211         data.tiles["tundra"]  .resources.push_back({ data.resources["rock"].id,    1.0  });
 212         data.tiles["tundra"]  .resources.push_back({ data.resources["ice"].id,     0.5  });
 213         data.tiles["water"]   .resources.push_back({ data.resources["water"].id,   1.0  });
 214         data.tiles["water"]   .resources.push_back({ data.resources["biomass"].id, 0.25 });
 215         data.tiles["wheat"]   .resources.push_back({ data.resources["biomass"].id, 1.0  });
 216         data.tiles["wheat"]   .resources.push_back({ data.resources["water"].id,   0.25 });
 217
 218         graphics::Format format;
 219         textures.tiles.Bind();
 220         textures.tiles.Reserve(256, 256, 14, format);
 221         LoadTileTexture("algae",    textures.tiles,  0);
 222         LoadTileTexture("desert",   textures.tiles,  1);
 223         LoadTileTexture("forest",   textures.tiles,  2);
 224         LoadTileTexture("grass",    textures.tiles,  3);
 225         LoadTileTexture("ice",      textures.tiles,  4);
 226         LoadTileTexture("jungle",   textures.tiles,  5);
 227         LoadTileTexture("mountain", textures.tiles,  6);
 228         LoadTileTexture("ocean",    textures.tiles,  7);
 229         LoadTileTexture("rock",     textures.tiles,  8);
 230         LoadTileTexture("sand",     textures.tiles,  9);
 231         LoadTileTexture("taiga",    textures.tiles, 10);
 232         LoadTileTexture("tundra",   textures.tiles, 11);
 233         LoadTileTexture("water",    textures.tiles, 12);
 234         LoadTileTexture("wheat",    textures.tiles, 13);
 235
 236         textures.skins.Bind();
 237         textures.skins.Reserve(256, 256, 9, format);
 238         LoadSkinTexture("1", textures.skins, 0);
 239         LoadSkinTexture("2", textures.skins, 1);
 240         LoadSkinTexture("3", textures.skins, 2);
 241         LoadSkinTexture("4", textures.skins, 3);
 242         LoadSkinTexture("5", textures.skins, 4);
 243         LoadSkinTexture("6", textures.skins, 5);
 244         LoadSkinTexture("7", textures.skins, 6);
 245         LoadSkinTexture("8", textures.skins, 7);
 246         LoadSkinTexture("9", textures.skins, 8);
 247 }
 248
 249 Assets::~Assets() {
 250 }
 251
 252 void Assets::ReadTileTypes(io::TokenStreamReader &in) {
 253         while (in.HasMore()) {
 254                 string name;
 255                 in.ReadIdentifier(name);
 256                 in.Skip(io::Token::EQUALS);
 257
 258                 int id = 0;
 259                 if (data.tiles.Has(name)) {
 260                         id = data.tiles[name].id;
 261                 } else {
 262                         world::TileType type;
 263                         type.name = name;
 264                         id = data.tiles.Add(type);
 265                 }
 266
 267                 in.Skip(io::Token::ANGLE_BRACKET_OPEN);
 268                 while (in.Peek().type != io::Token::ANGLE_BRACKET_CLOSE) {
 269                         in.ReadIdentifier(name);
 270                         in.Skip(io::Token::EQUALS);
 271                         if (name == "label") {
 272                                 in.ReadString(data.tiles[id].label);
 273                         } else if (name == "texture") {
 274                                 data.tiles[id].texture = in.GetInt();
 275                         } else {
 276                                 throw std::runtime_error("unknown tile type property '" + name + "'");
 277                         }
 278                         in.Skip(io::Token::SEMICOLON);
 279                 }
 280                 in.Skip(io::Token::ANGLE_BRACKET_CLOSE);
 281                 in.Skip(io::Token::SEMICOLON);
 282         }
 283 }
 284
 285 void Assets::LoadTileTexture(const string &name, graphics::ArrayTexture &tex, int layer) const {
 286         string path = tile_path + name + ".png";
 287         SDL_Surface *srf = IMG_Load(path.c_str());
 288         if (!srf) {
 289                 throw SDLError("IMG_Load");
 290         }
 291         try {
 292                 tex.Data(layer, *srf);
 293         } catch (...) {
 294                 SDL_FreeSurface(srf);
 295                 throw;
 296         }
 297         SDL_FreeSurface(srf);
 298 }
 299
 300 void Assets::LoadSkinTexture(const string &name, graphics::ArrayTexture &tex, int layer) const {
 301         string path = skin_path + name + ".png";
 302         SDL_Surface *srf = IMG_Load(path.c_str());
 303         if (!srf) {
 304                 throw SDLError("IMG_Load");
 305         }
 306         try {
 307                 tex.Data(layer, *srf);
 308         } catch (...) {
 309                 SDL_FreeSurface(srf);
 310                 throw;
 311         }
 312         SDL_FreeSurface(srf);
 313 }
 314
 315 }
 316 }