src/app/runtime.cpp

   1 #include "Application.hpp"
   2 #include "Environment.hpp"
   3 #include "Runtime.hpp"
   4 #include "WorldState.hpp"
   5
   6 #include "init.hpp"
   7 #include "../io/WorldSave.hpp"
   8
   9 #include <cctype>
  10 #include <cstdlib>
  11 #include <iostream>
  12 #include <SDL.h>
  13
  14 using namespace std;
  15
  16
  17 namespace {
  18
  19 string default_asset_path() {
  20         char *base = SDL_GetBasePath();
  21         string assets(base);
  22         assets += "assets/";
  23         SDL_free(base);
  24         return assets;
  25 }
  26
  27 string default_save_path() {
  28 #ifndef NDEBUG
  29         char *base = SDL_GetBasePath();
  30         string save(base);
  31         save += "saves/";
  32         SDL_free(base);
  33         return save;
  34 #else
  35         char *pref = SDL_GetPrefPath("localhorst", "blank");
  36         string save(pref);
  37         SDL_free(pref);
  38         return save;
  39 #endif
  40 }
  41
  42 }
  43
  44 namespace blank {
  45
  46 Environment::Environment(Window &win, const string &asset_path)
  47 : audio()
  48 , viewport()
  49 , window(win)
  50 , assets(asset_path)
  51 , counter() {
  52         viewport.Clear();
  53         window.Flip();
  54 }
  55
  56
  57 Runtime::Runtime() noexcept
  58 : name("blank")
  59 , mode(NORMAL)
  60 , n(0)
  61 , t(0)
  62 , config() {
  63
  64 }
  65
  66
  67 void Runtime::ReadArgs(int argc, const char *const *argv) {
  68         if (argc <= 0) return;
  69         name = argv[0];
  70
  71         bool options = true;
  72         bool error = false;
  73
  74         for (int i = 1; i < argc; ++i) {
  75                 const char *arg = argv[i];
  76                 if (!arg || arg[0] == '\0') {
  77                         cerr << "warning: found empty argument at position " << i << endl;
  78                         continue;
  79                 }
  80                 if (options && arg[0] == '-') {
  81                         if (arg[1] == '\0') {
  82                                 cerr << "warning: incomplete option list at position " << i << endl;
  83                         } else if (arg[1] == '-') {
  84                                 if (arg[2] == '\0') {
  85                                         // stopper
  86                                         options = false;
  87                                 } else {
  88                                         const char *param = arg + 2;
  89                                         // long option
  90                                         if (strcmp(param, "no-vsync") == 0) {
  91                                                 config.vsync = false;
  92                                         } else if (strcmp(param, "no-keyboard") == 0) {
  93                                                 config.interface.keyboard_disabled = true;
  94                                         } else if (strcmp(param, "no-mouse") == 0) {
  95                                                 config.interface.mouse_disabled = true;
  96                                         } else if (strcmp(param, "no-hud") == 0) {
  97                                                 config.interface.visual_disabled = true;
  98                                         } else if (strcmp(param, "no-audio") == 0) {
  99                                                 config.interface.audio_disabled = true;
 100                                         } else if (strcmp(param, "asset-path") == 0) {
 101                                                 ++i;
 102                                                 if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 103                                                         cerr << "missing argument to --asset-path" << endl;
 104                                                         error = true;
 105                                                 } else {
 106                                                         config.asset_path = argv[i];
 107                                                 }
 108                                         } else if (strcmp(param, "save-path") == 0) {
 109                                                 ++i;
 110                                                 if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 111                                                         cerr << "missing argument to --save-path" << endl;
 112                                                         error = true;
 113                                                 } else {
 114                                                         config.save_path = argv[i];
 115                                                 }
 116                                         } else if (strcmp(param, "world-name") == 0) {
 117                                                 ++i;
 118                                                 if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 119                                                         cerr << "missing argument to --world-name" << endl;
 120                                                         error = true;
 121                                                 } else {
 122                                                         config.world_name = argv[i];
 123                                                 }
 124                                         } else {
 125                                                 cerr << "unknown option " << arg << endl;
 126                                                 error = true;
 127                                         }
 128                                 }
 129                         } else {
 130                                 // short options
 131                                 for (int j = 1; arg[j] != '\0'; ++j) {
 132                                         switch (arg[j]) {
 133                                                 case 'd':
 134                                                         config.doublebuf = false;
 135                                                         break;
 136                                                 case 'm':
 137                                                         ++i;
 138                                                         if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 139                                                                 cerr << "missing argument to -m" << endl;
 140                                                                 error = true;
 141                                                         } else {
 142                                                                 config.multisampling = strtoul(argv[i], nullptr, 10);
 143                                                         }
 144                                                         break;
 145                                                 case 'n':
 146                                                         ++i;
 147                                                         if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 148                                                                 cerr << "missing argument to -n" << endl;
 149                                                                 error = true;
 150                                                         } else {
 151                                                                 n = strtoul(argv[i], nullptr, 10);
 152                                                         }
 153                                                         break;
 154                                                 case 's':
 155                                                         ++i;
 156                                                         if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 157                                                                 cerr << "missing argument to -s" << endl;
 158                                                                 error = true;
 159                                                         } else {
 160                                                                 config.world.gen.seed = strtoul(argv[i], nullptr, 10);
 161                                                         }
 162                                                         break;
 163                                                 case 't':
 164                                                         ++i;
 165                                                         if (i >= argc || argv[i] == nullptr || argv[i][0] == '\0') {
 166                                                                 cerr << "missing argument to -t" << endl;
 167                                                                 error = true;
 168                                                         } else {
 169                                                                 t = strtoul(argv[i], nullptr, 10);
 170                                                         }
 171                                                         break;
 172                                                 case '-':
 173                                                         // stopper
 174                                                         options = false;
 175                                                         break;
 176                                                 default:
 177                                                         cerr << "unknown option " << arg[j] << endl;
 178                                                         error = true;
 179                                                         break;
 180                                         }
 181                                 }
 182                         }
 183                 } else {
 184                         cerr << "unable to interpret argument "
 185                                 << i << " (" << arg << ")" << endl;
 186                         error = true;
 187                 }
 188         }
 189
 190         if (error) {
 191                 mode = ERROR;
 192                 return;
 193         }
 194
 195         if (config.asset_path.empty()) {
 196                 config.asset_path = default_asset_path();
 197         } else if (
 198                 config.asset_path[config.asset_path.size() - 1] != '/' &&
 199                 config.asset_path[config.asset_path.size() - 1] != '\\'
 200         ) {
 201                 config.asset_path += '/';
 202         }
 203         if (config.save_path.empty()) {
 204                 config.save_path = default_save_path();
 205         } else if (
 206                 config.save_path[config.save_path.size() - 1] != '/' &&
 207                 config.save_path[config.save_path.size() - 1] != '\\'
 208         ) {
 209                 config.save_path += '/';
 210         }
 211
 212         if (n > 0) {
 213                 if (t > 0) {
 214                         mode = FIXED_FRAME_LIMIT;
 215                 } else {
 216                         mode = FRAME_LIMIT;
 217                 }
 218         } else if (t > 0) {
 219                 mode = TIME_LIMIT;
 220         } else {
 221                 mode = NORMAL;
 222         }
 223 }
 224
 225 int Runtime::Execute() {
 226         if (mode == ERROR) {
 227                 return 1;
 228         }
 229
 230         Init init(config.doublebuf, config.multisampling);
 231
 232         Environment env(init.window, config.asset_path);
 233         env.viewport.VSync(config.vsync);
 234
 235         WorldSave save(config.save_path + config.world_name + '/');
 236         if (save.Exists()) {
 237                 save.Read(config.world);
 238         } else {
 239                 save.Write(config.world);
 240         }
 241
 242         Application app(env);
 243
 244         WorldState world_state(env, config.interface, config.world, save);
 245         app.PushState(&world_state);
 246
 247         switch (mode) {
 248                 default:
 249                 case NORMAL:
 250                         app.Run();
 251                         break;
 252                 case FRAME_LIMIT:
 253                         app.RunN(n);
 254                         break;
 255                 case TIME_LIMIT:
 256                         app.RunT(t);
 257                         break;
 258                 case FIXED_FRAME_LIMIT:
 259                         app.RunS(n, t);
 260                         break;
 261         }
 262
 263         return 0;
 264 }
 265
 266 }