Main.cpp
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Main.cpp
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	/*
	* Copyright (C) 2011-2012 Me and My Shadow
	*
	* This file is part of Me and My Shadow.
	*
	* Me and My Shadow is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 3 of the License, or
	* (at your option) any later version.
	*
	* Me and My Shadow is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with Me and My Shadow. If not, see <http://www.gnu.org/licenses/>.
	*/

	#include "Functions.h"
	#include "Timer.h"
	#include "Objects.h"
	#include "Globals.h"
	#include "TitleMenu.h"
	#include "GUIObject.h"
	#include "InputManager.h"
	#include "MD5.h"
	#include "StatisticsManager.h"
	#include <SDL/SDL.h>
	#include <stdlib.h>
	#include <time.h>
	#include <stdio.h>
	#include <string.h>

	#ifdef HARDWARE_ACCELERATION
	#include <GL/gl.h>
	#include <GL/glu.h>
	#endif

	//Variables for recording.
	//To enable picture recording uncomment the next line:
	//#define RECORD_PICUTRE_SEQUENCE
	#ifdef RECORD_PICUTRE_SEQUENCE
	bool recordPictureSequence=false;
	int recordPictureIndex=0;
	#endif
	#ifdef __APPLE__
	int SDL_main(int argc, char** argv) {
	#else
	int main(int argc, char** argv) {
	#endif
	#ifdef _MSC_VER
	//Fix the non-latin file name bug under Visual Studio
	setlocale(LC_ALL,"");
	#endif

	//First parse the comand line arguments.
	int s=parseArguments(argc,argv);
	if(s==-1){
	printf("Usage: %s [OPTIONS] ...\n",argv[0]);
	printf("%s","Available options:\n");
	printf(" %-5s%-30s %s\n","","--data-dir <dir>","Specifies the data directory.");
	printf(" %-5s%-30s %s\n","","--user-dir <dir>","Specifies the user preferences directory.");
	printf(" %-5s%-30s %s\n","-f,","--fullscreen","Run the game fullscreen.");
	printf(" %-5s%-30s %s\n","-w,","--windowed","Run the game windowed.");
	printf(" %-5s%-30s %s\n","-mv,","--music <volume>","Set the music volume.");
	printf(" %-5s%-30s %s\n","-sv,","--sound <volume>","Set the sound volume.");
	printf(" %-5s%-30s %s\n","-s,","--set <setting> <value>","Change a setting to a given value.");
	printf(" %-5s%-30s %s\n","-v,","--version","Display the version and quit.");
	printf(" %-5s%-30s %s\n","-h,","--help","Display this help message.");
	return 0;
	}else if(s==0){
	return 0;
	}

	//Try to configure the dataPath, userPath, etc...
	if(configurePaths()==false){
	fprintf(stderr,"FATAL ERROR: Failed to configure paths.\n");
	return 1;
	}
	//Load the settings.
	if(loadSettings()==false){
	fprintf(stderr,"FATAL ERROR: Failed to load config file.\n");
	return 1;
	}
	//Initialise some stuff like SDL, the window, SDL_Mixer.
	if(init()==false) {
	fprintf(stderr,"FATAL ERROR: Failed to initalize game.\n");
	return 1;
	}
	//Load some important files like the background music, default theme.
	if(loadFiles()==false){
	fprintf(stderr,"FATAL ERROR: Failed to load necessary files.\n");
	return 1;
	}

	//Set the currentState id to the main menu and create it.
	stateID=STATE_MENU;
	currentState=new Menu();

	//Seed random.
	srand((unsigned)time(NULL));

	//Set the fadeIn value to zero.
	int fadeIn=0;

	//Keep the last resize event, this is to only process one.
	SDL_Event lastResize={};

	//Start the game loop.
	while(stateID!=STATE_EXIT){
	//We start the timer.
	FPS.start();

	//Loop the SDL events.
	while(SDL_PollEvent(&event)){
	//Check if user resizes the window.
	if(event.type==SDL_VIDEORESIZE){
	lastResize=event;

	//Don't let other objects process this event (?)
	continue;
	}

	//Check if the fullscreen toggle shortcut is pressed (Alt+Enter).
	if(event.type==SDL_KEYUP && event.key.keysym.sym==SDLK_RETURN && (event.key.keysym.mod & KMOD_ALT)){
	getSettings()->setValue("fullscreen",getSettings()->getBoolValue("fullscreen")?"0":"1");

	//We need to create a new screen.
	if(!createScreen()){
	//Screen creation failed so set to safe settings.
	getSettings()->setValue("fullscreen","0");
	getSettings()->setValue("width","800");
	getSettings()->setValue("height","600");

	//Try it with the safe settings.
	if(!createScreen()){
	//Everything fails so quit.
	setNextState(STATE_EXIT);
	cerr<<"ERROR: Unable to create screen."<<endl;
	}
	}

	//The screen is created, now load the (menu) theme.
	if(!loadTheme("")){
	//Loading the theme failed so quit.
	setNextState(STATE_EXIT);
	cerr<<"ERROR: Unable to load theme after toggling fullscreen."<<endl;
	}

	//Don't let other objects process this event.
	continue;
	}

	#ifdef RECORD_PICUTRE_SEQUENCE
	if(event.type==SDL_KEYDOWN && event.key.keysym.sym==SDLK_F10){
	recordPictureSequence=!recordPictureSequence;
	printf("Record Picture Sequence %s\n",recordPictureSequence?"ON":"OFF");
	}
	#endif
	//Let the input manager handle the events.
	inputMgr.updateState(true);
	//Let the currentState handle the events.
	currentState->handleEvents();
	//Also pass the events to the GUI.
	GUIObjectHandleEvents();
	}

	//Process the resize event.
	if(lastResize.type==SDL_VIDEORESIZE){
	event=lastResize;
	onVideoResize();

	//After resize we erase the event type
	lastResize.type=SDL_NOEVENT;
	}

	//maybe we should add a check here (??) to fix some bugs (ticket #47)
	if(nextState!=STATE_NULL){
	fadeIn=17;
	changeState();
	}
	if(stateID==STATE_EXIT) break;

	//update input state (??)
	inputMgr.updateState(false);
	//Now it's time for the state to do his logic.
	currentState->logic();

	currentState->render();
	//TODO: Shouldn't the gamestate take care of rendering the GUI?
	if(GUIObjectRoot) GUIObjectRoot->render();

	//draw new achievements (if any)
	statsMgr.render();

	//draw fading effect
	if(fadeIn>0&&fadeIn<255){
	SDL_BlitSurface(screen,NULL,tempSurface,NULL);
	SDL_FillRect(screen,NULL,0);
	SDL_SetAlpha(tempSurface, SDL_SRCALPHA, fadeIn);
	SDL_BlitSurface(tempSurface,NULL,screen,NULL);
	fadeIn+=17;
	}

	#ifdef RECORD_PICUTRE_SEQUENCE
	if(recordPictureSequence){
	char s[64];
	recordPictureIndex++;
	sprintf(s,"pic%08d.bmp",recordPictureIndex);
	printf("Save screen to %s\n",s);
	SDL_SaveBMP(screen,(getUserPath(USER_CACHE)+s).c_str());
	}
	#endif
	//And draw the screen surface to the actual screen.
	flipScreen();

	//Check if nextState is set, meaning we should fade in and change state.
	if(nextState!=STATE_NULL){
	fadeIn=17;
	changeState();
	}

	//Now calcualte how long we need to wait to keep a constant framerate.
	int t=FPS.getTicks();
	t=(1000/g_FPS)-t;
	if(t>0){
	SDL_Delay(t);
	}
	}

	//The game has ended, save the settings just to be sure.
	saveSettings();

	//Clean everything up.
	clean();

	//End of program.
	return 0;
	}

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