src/main.cpp

   1 /******************************
   2 ** Tsunagari Tile Engine     **
   3 ** main.cpp                  **
   4 ** Copyright 2011 OmegaSDG   **
   5 ******************************/
   6
   7 #include <fstream>
   8 #include <istream>
   9 #include <stdio.h>
  10 #include <string>
  11
  12 #include <json/json.h>
  13
  14 #include "common.h"
  15 #include "window.h"
  16
  17
  18 /**
  19  * This probably won't be changed ever except maybe with a command line option.
  20  */
  21 #define CLIENT_CONF_FILE "./client.conf"
  22
  23 /**
  24  * Values needed prior to creating the GameWindow.
  25  */
  26 struct ClientValues {
  27         std::string world;
  28         coord_t windowsize;
  29         bool fullscreen;
  30 };
  31
  32
  33 /**
  34  * Load the values we need to start initializing the game from a JSON file.
  35  *
  36  * We need to know what size window to create and which World to load. This
  37  * information will be stored in a JSON file which we parse here.
  38  *
  39  * @param filename Name of the JSON-encoded file to load from.
  40  * @param conf Values are stored here.
  41  *
  42  * @return True if successful
  43  */
  44 static bool parseClientConfig(const std::string filename, ClientValues* conf)
  45 {
  46         Json::Reader reader;
  47         Json::Value root, windowsize;
  48
  49         std::ifstream file(filename);
  50
  51         if (!reader.parse(file, root)) {
  52                 printf("Client config failed to parse as JSON\n");
  53                 return false;
  54         }
  55
  56         /* GET:
  57          *  - name of World to load
  58          *  - width, height, fullscreen-ness of Window
  59          */
  60         conf->world = root.get("world", "_NONE_").asString();
  61         if (conf->world == "_NONE_") {
  62                 printf("Client config didn't contain world name\n");
  63                 return false;
  64         }
  65
  66         windowsize = root["windowsize"];
  67         if (windowsize.size() != 2) {
  68                 printf("Client config windowsize didn't contain 2 values\n");
  69                 return false;
  70         }
  71
  72         conf->windowsize.x = windowsize[uint(0)].asUInt();
  73         conf->windowsize.y = windowsize[1].asUInt();
  74
  75         conf->fullscreen = root.get("fullscreen", false).asBool();
  76
  77         return true;
  78 }
  79
  80 /**
  81  * Load client config and instantiate window.
  82  *
  83  * The client config tells us our window parameters along with which World
  84  * we're going to load. The GameWindow class then loads and plays the game.
  85  */
  86 int main()
  87 {
  88         ClientValues conf;
  89
  90         if (!parseClientConfig(CLIENT_CONF_FILE, &conf))
  91                 return 1;
  92
  93         GameWindow window(conf.windowsize.x, conf.windowsize.y,
  94                 conf.fullscreen);
  95         window.show();
  96
  97         return 0;
  98 }
  99