ThemeManager.cpp
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ThemeManager.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 "ThemeManager.h"
	#include "POASerializer.h"
	#include "Functions.h"
	#include "FileManager.h"
	#include "Game.h"
	#ifdef __APPLE__
	#include <SDL_gfx/SDL_rotozoom.h>
	#else
	#include <SDL/SDL_rotozoom.h>
	#endif
	#include <string.h>
	#include <iostream>
	using namespace std;

	//The ThemeStack that is be used by the GameState.
	ThemeStack objThemes;

	bool ThemeManager::loadFile(const string& fileName){
	POASerializer objSerializer;
	TreeStorageNode objNode;

	//First we destroy the current ThemeManager.
	destroy();

	//Now we try to load the file, if it fails we return false.
	if(!objSerializer.loadNodeFromFile(fileName.c_str(),&objNode,true)){
	cerr<<"ERROR: Unable to open theme file: "<<fileName<<endl;
	return false;
	}

	//Set the themePath.
	themePath=pathFromFileName(fileName);

	//Retrieve the name of the theme from the file.
	{
	vector<string> &v=objNode.attributes["name"];
	if(!v.empty()) themeName=v[0];
	}

	//Reset themeable colors to default
	themeTextColor.r=themeTextColor.g=themeTextColor.b=0;
	themeTextColorDialog.r=themeTextColorDialog.g=themeTextColorDialog.b=0;

	//Read themeable colors if any
	vector<string> &ct=objNode.attributes["textColor"];
	if(!ct.empty()){
	themeTextColor.r=atoi(ct[0].c_str());
	themeTextColor.g=atoi(ct[1].c_str());
	themeTextColor.b=atoi(ct[2].c_str());
	}

	vector<string> &ct2=objNode.attributes["textColorDialog"];
	if(!ct2.empty()){
	themeTextColorDialog.r=atoi(ct2[0].c_str());
	themeTextColorDialog.g=atoi(ct2[1].c_str());
	themeTextColorDialog.b=atoi(ct2[2].c_str());
	}

	//Loop the subnodes of the theme.
	for(unsigned int i=0;i<objNode.subNodes.size();i++){
	TreeStorageNode *obj=objNode.subNodes[i];

	//Check if it's a block or a background.
	if(obj->name=="block" && !obj->value.empty()){
	map<string,int>::iterator it=Game::blockNameMap.find(obj->value[0]);
	if(it!=Game::blockNameMap.end()){
	int idx=it->second;
	if(!objBlocks[idx]) objBlocks[idx]=new ThemeBlock;
	if(!objBlocks[idx]->loadFromNode(obj,themePath)){
	cerr<<"ERROR: Unable to load "<<Game::blockName[idx]<<" for theme "<<fileName<<endl;
	delete objBlocks[idx];
	objBlocks[idx]=NULL;
	return false;
	}
	}
	}else if(obj->name=="background" && !obj->value.empty()){
	if(!objBackground) objBackground=new ThemeBackground();
	if(!objBackground->addPictureFromNode(obj,themePath)){
	cerr<<"ERROR: Unable to load background for theme "<<fileName<<endl;
	delete objBackground;
	objBackground=NULL;
	return false;
	}
	}else if(obj->name=="character" && !obj->value.empty()){
	if(obj->value[0]=="Shadow"){
	if(!shadow) shadow=new ThemeBlock();
	if(!shadow->loadFromNode(obj,themePath)){
	cerr<<"ERROR: Unable to load shadow for theme "<<fileName<<endl;
	delete shadow;
	shadow=NULL;
	return false;
	}
	}else if(obj->value[0]=="Player"){
	if(!player) player=new ThemeBlock();
	if(!player->loadFromNode(obj,themePath)){
	cerr<<"ERROR: Unable to load player for theme "<<fileName<<endl;
	delete player;
	player=NULL;
	return false;
	}
	}
	}else if(obj->name=="menuBackground" && !obj->value.empty()){
	if(!menuBackground) menuBackground=new ThemeBackground();
	if(!menuBackground->addPictureFromNode(obj,themePath)){
	cerr<<"ERROR: Unable to load background for theme "<<fileName<<endl;
	delete menuBackground;
	menuBackground=NULL;
	return false;
	}
	}else if(obj->name=="menu" && obj->value[0]=="Block"){
	if(!menuBlock) menuBlock=new ThemeBlock;
	if(!menuBlock->loadFromNode(obj,themePath)){
	cerr<<"ERROR: Unable to load menu block for theme "<<fileName<<endl;
	delete menuBlock;
	menuBlock=NULL;
	return false;
	}
	}
	}

	//Done and nothing went wrong so return true.
	return true;
	}

	bool ThemeBlock::loadFromNode(TreeStorageNode* objNode, string themePath){
	destroy();

	//Loop the subNodes.
	for(unsigned int i=0;i<objNode->subNodes.size();i++){
	TreeStorageNode *obj=objNode->subNodes[i];

	//Check if the subnode is an editorPicture or a blockState.
	if(obj->name=="editorPicture"){
	if(!editorPicture.loadFromNode(obj,themePath)) return false;
	//NOTE: blockState and characterState are for backwards compatability, use state instead.
	}else if((obj->name=="blockState" \|\| obj->name=="characterState" \|\| obj->name=="state") && !obj->value.empty()){
	string& s=obj->value[0];
	map<string,ThemeBlockState*>::iterator it=blockStates.find(s);
	if(it==blockStates.end()) blockStates[s]=new ThemeBlockState;
	if(!blockStates[s]->loadFromNode(obj,themePath)) return false;
	}else if(obj->name=="transitionState" && obj->value.size()==2){
	pair<string,string> s=pair<string,string>(obj->value[0],obj->value[1]);
	map<pair<string,string>,ThemeBlockState*>::iterator it=transitions.find(s);
	if(it==transitions.end()) transitions[s]=new ThemeBlockState;
	if(!transitions[s]->loadFromNode(obj,themePath)) return false;
	}
	}

	//Done and nothing went wrong so return true.
	return true;
	}

	bool ThemeBlockState::loadFromNode(TreeStorageNode* objNode, string themePath){
	destroy();

	//Retrieve the oneTimeAnimation attribute.
	{
	vector<string> &v=objNode->attributes["oneTimeAnimation"];

	//Check if there are enough values for the oneTimeAnimation attribute.
	if(v.size()>=2 && !v[0].empty()){
	oneTimeAnimationLength=atoi(v[0].c_str());
	nextState=v[1];
	}
	}

	//Loop the subNodes.
	for(unsigned int i=0;i<objNode->subNodes.size();i++){
	TreeStorageNode *obj=objNode->subNodes[i];
	if(obj->name=="object"){
	ThemeObject *obj1=new ThemeObject();
	if(!obj1->loadFromNode(obj,themePath)){
	delete obj1;
	return false;
	}
	themeObjects.push_back(obj1);
	}
	}

	//Done and nothing went wrong so return true.
	return true;
	}

	bool ThemeObject::loadFromNode(TreeStorageNode* objNode,string themePath){
	destroy();

	//Retrieve the animation attribute.
	{
	vector<string> &v=objNode->attributes["animation"];
	if(v.size()>=2){
	animationLength=atoi(v[0].c_str());
	animationLoopPoint=atoi(v[1].c_str());
	}
	}
	//Retrieve the oneTimeAnimation attribute.
	{
	vector<string> &v=objNode->attributes["oneTimeAnimation"];
	if(v.size()>=2){
	animationLength=atoi(v[0].c_str());
	animationLoopPoint=atoi(v[1].c_str())\|0x80000000;
	}
	}
	//Retrieve the invisibleAtRunTime attribute.
	{
	vector<string> &v=objNode->attributes["invisibleAtRunTime"];
	if(!v.empty() && !v[0].empty()){
	invisibleAtRunTime=atoi(v[0].c_str())?true:false;
	}
	}
	//Retrieve the invisibleAtDesignTime attribute.
	{
	vector<string> &v=objNode->attributes["invisibleAtDesignTime"];
	if(!v.empty() && !v[0].empty()){
	invisibleAtDesignTime=atoi(v[0].c_str())?true:false;
	}
	}

	//Loop the subnodes.
	for(unsigned int i=0;i<objNode->subNodes.size();i++){
	TreeStorageNode *obj=objNode->subNodes[i];
	if(obj->name=="picture" \|\| obj->name=="pictureAnimation"){
	if(!picture.loadFromNode(obj,themePath)){
	return false;
	}
	}else if(obj->name=="editorPicture"){
	if(!editorPicture.loadFromNode(obj,themePath)){
	return false;
	}
	}else if(obj->name=="optionalPicture" && obj->value.size()>=6){
	ThemePicture *objPic=new ThemePicture();
	double f=atof(obj->value[5].c_str());
	if(!objPic->loadFromNode(obj,themePath)){
	delete objPic;
	return false;
	}
	optionalPicture.push_back(pair<double,ThemePicture*>(f,objPic));
	}else if(obj->name=="offset" \|\| obj->name=="offsetAnimation"){
	if(!offset.loadFromNode(obj)) return false;
	}
	}

	//Done and nothing went wrong so return true.
	return true;
	}

	bool ThemePicture::loadFromNode(TreeStorageNode* objNode,string themePath){
	destroy();

	//Check if the node has enough values.
	if(!objNode->value.empty()){
	//Load the picture.
	picture=loadImage(themePath+objNode->value[0]);
	if(picture==NULL) return false;

	//Check if it's an animation.
	if(objNode->name=="pictureAnimation"){
	if(!offset.loadFromNode(objNode)) return false;
	return true;
	}else if(objNode->value.size()>=5){
	typeOffsetPoint r={atoi(objNode->value[1].c_str()),
	atoi(objNode->value[2].c_str()),
	atoi(objNode->value[3].c_str()),
	atoi(objNode->value[4].c_str()),0,0};
	offset.offsetData.push_back(r);
	offset.length=0;
	return true;
	}
	}

	//Done and nothing went wrong so return true.
	return false;
	}

	bool ThemeOffsetData::loadFromNode(TreeStorageNode* objNode){
	destroy();

	//Check what kind of offset it is.
	if(objNode->name=="pictureAnimation"){
	for(unsigned int i=0;i<objNode->subNodes.size();i++){
	TreeStorageNode* obj=objNode->subNodes[i];
	if(obj->name=="point" && obj->value.size()>=4){
	typeOffsetPoint r={atoi(obj->value[0].c_str()),
	atoi(obj->value[1].c_str()),
	atoi(obj->value[2].c_str()),
	atoi(obj->value[3].c_str()),1,1};
	if(obj->value.size()>=5) r.frameCount=atoi(obj->value[4].c_str());
	if(obj->value.size()>=6) r.frameDisplayTime=atoi(obj->value[5].c_str());
	offsetData.push_back(r);
	length+=r.frameCount*r.frameDisplayTime;
	}
	}
	return true;
	}else if(objNode->name=="offsetAnimation"){
	for(unsigned int i=0;i<objNode->subNodes.size();i++){
	TreeStorageNode* obj=objNode->subNodes[i];
	if(obj->name=="point" && obj->value.size()>=2){
	typeOffsetPoint r={atoi(obj->value[0].c_str()),
	atoi(obj->value[1].c_str()),0,0,1,1};
	if(obj->value.size()>=3) r.frameCount=atoi(obj->value[2].c_str());
	if(obj->value.size()>=4) r.frameDisplayTime=atoi(obj->value[3].c_str());
	offsetData.push_back(r);
	length+=r.frameCount*r.frameDisplayTime;
	}
	}
	return true;
	}else if(objNode->name=="offset" && objNode->value.size()>=2){
	typeOffsetPoint r={atoi(objNode->value[0].c_str()),
	atoi(objNode->value[1].c_str()),0,0,0,0};
	offsetData.push_back(r);
	length=0;
	return true;
	}

	//Done and nothing went wrong so return true.
	return false;
	}

	void ThemeObjectInstance::draw(SDL_Surface dest,int x,int y,SDL_Rect clipRect){
	//Get the picture.
	SDL_Surface *src=picture->picture;
	if(src==NULL) return;
	int ex=0,ey=0,xx=0,yy=0,ww=0,hh=0;
	int animationNew=animation&0x7FFFFFFF;
	{
	vector<typeOffsetPoint> &v=picture->offset.offsetData;
	if(picture->offset.length==0 \|\| animationNew<v[0].frameDisplayTime){
	xx=v[0].x;
	yy=v[0].y;
	ww=v[0].w;
	hh=v[0].h;
	}else if(animationNew>=picture->offset.length){
	int i=v.size()-1;
	xx=v[i].x;
	yy=v[i].y;
	ww=v[i].w;
	hh=v[i].h;
	}else{
	int t=animationNew-v[0].frameDisplayTime;
	for(unsigned int i=1;i<v.size();i++){
	int tt=t/v[i].frameDisplayTime;
	if(tt>=0 && tt<v[i].frameCount){
	xx=(int)((float)v[i-1].x+(float)(v[i].x-v[i-1].x)*(float)(tt+1)/(float)v[i].frameCount+0.5f);
	yy=(int)((float)v[i-1].y+(float)(v[i].y-v[i-1].y)*(float)(tt+1)/(float)v[i].frameCount+0.5f);
	ww=(int)((float)v[i-1].w+(float)(v[i].w-v[i-1].w)*(float)(tt+1)/(float)v[i].frameCount+0.5f);
	hh=(int)((float)v[i-1].h+(float)(v[i].h-v[i-1].h)*(float)(tt+1)/(float)v[i].frameCount+0.5f);
	break;
	}else{
	t-=v[i].frameCount*v[i].frameDisplayTime;
	}
	}
	}
	}
	//Get the offset.
	{
	vector<typeOffsetPoint> &v=parent->offset.offsetData;
	if(v.empty()){
	ex=0;
	ey=0;
	}else if(parent->offset.length==0 \|\| animationNew<v[0].frameDisplayTime){
	ex=v[0].x;
	ey=v[0].y;
	}else if(animationNew>=parent->offset.length){
	int i=v.size()-1;
	ex=v[i].x;
	ey=v[i].y;
	}else{
	int t=animationNew-v[0].frameDisplayTime;
	for(unsigned int i=1;i<v.size();i++){
	int tt=t/v[i].frameDisplayTime;
	if(tt>=0 && tt<v[i].frameCount){
	ex=(int)((float)v[i-1].x+(float)(v[i].x-v[i-1].x)*(float)(tt+1)/(float)v[i].frameCount+0.5f);
	ey=(int)((float)v[i-1].y+(float)(v[i].y-v[i-1].y)*(float)(tt+1)/(float)v[i].frameCount+0.5f);
	break;
	}else{
	t-=v[i].frameCount*v[i].frameDisplayTime;
	}
	}
	}
	}

	//And finally draw the ThemeObjectInstance.
	if(clipRect){
	int d;
	d=clipRect->x-ex;
	if(d>0){
	ex+=d;
	xx+=d;
	ww-=d;
	}
	d=clipRect->y-ey;
	if(d>0){
	ey+=d;
	yy+=d;
	hh-=d;
	}
	if(ww>clipRect->w) ww=clipRect->w;
	if(hh>clipRect->h) hh=clipRect->h;
	}
	if(ww>0&&hh>0){
	SDL_Rect r1={xx,yy,ww,hh};
	SDL_Rect r2={x+ex,y+ey,0,0};
	SDL_BlitSurface(src,&r1,dest,&r2);
	}
	}

	void ThemeObjectInstance::updateAnimation(){
	//First get the animation length.
	int m;
	m=parent->animationLength;

	//If it's higher than 0 then we have an animation.
	if(m>0 && animation>=0){
	//Increase the animation frame.
	animation++;
	//Check if the animation is beyond the length, if so set it to the looppoint.
	if(animation>=m)
	animation=parent->animationLoopPoint;
	}
	}

	void ThemeBlockInstance::updateAnimation(){
	//Make sure the currentState isn't null.
	if(currentState!=NULL){
	//Call the updateAnimation method of the currentState.
	currentState->updateAnimation();

	//Get the length of the animation.
	int m=currentState->parent->oneTimeAnimationLength;

	//If it's higher than 0 then we have an animation.
	//Also check if it's past the lenght, meaning done.
	if(m>0 && currentState->animation>=m){
	//Now we can change the state to the nextState.
	changeState(currentState->parent->nextState);
	}
	}
	}

	void ThemeBlock::createInstance(ThemeBlockInstance* obj){
	//Make sure the given ThemeBlockInstance is ready.
	obj->blockStates.clear();
	obj->transitions.clear();
	obj->currentState=NULL;

	//Loop through the blockstates.
	for(map<string,ThemeBlockState*>::iterator it=blockStates.begin();it!=blockStates.end();++it){
	//Get the themeBlockStateInstance of the given ThemeBlockInstance.
	ThemeBlockStateInstance &obj1=obj->blockStates[it->first];
	//Set the parent of the state instance.
	obj1.parent=it->second;

	//Create the state instance.
	createStateInstance(&obj1);
	}

	//Loop through the transitions.
	for(map<pair<string,string>,ThemeBlockState*>::iterator it=transitions.begin();it!=transitions.end();++it){
	//Get the themeBlockStateInstance of the given ThemeBlockInstance.
	ThemeBlockStateInstance &obj1=obj->transitions[it->first];
	//Set the parent of the state instance.
	obj1.parent=it->second;

	//Create the state instance.
	createStateInstance(&obj1);
	}

	//Change the state to the default one.
	//FIXME: Is that needed?
	obj->changeState("default");
	}

	void ThemeBlock::createStateInstance(ThemeBlockStateInstance* obj){
	//Get the vector with themeObjects.
	vector<ThemeObject*> &v=obj->parent->themeObjects;

	//Loop through them.
	for(unsigned int i=0;i<v.size();i++){
	//Create an instance for every one.
	ThemeObjectInstance p;
	//Set the parent.
	p.parent=v[i];

	//Choose the picture.
	if(stateID==STATE_LEVEL_EDITOR){
	if(p.parent->invisibleAtDesignTime)
	continue;
	if(p.parent->editorPicture.picture!=NULL)
	p.picture=&p.parent->editorPicture;
	}else{
	if(p.parent->invisibleAtRunTime)
	continue;
	}

	//Get the number of optional Pictures.
	int m=p.parent->optionalPicture.size();
	//If p.picture is null, not an editor picture, and there are optional pictures then give one random.
	if(p.picture==NULL && m>0){
	double f=0.0,f1=1.0/256.0;
	for(int j=0;j<8;j++){
	f+=f1*(double)(rand()&0xff);
	f1*=(1.0/256.0);
	}
	for(int j=0;j<m;j++){
	f-=p.parent->optionalPicture[j].first;
	if(f<0.0){
	p.picture=p.parent->optionalPicture[j].second;
	break;
	}
	}
	}

	//If random turned out to give nothing then give the non optional picture.
	if(p.picture==NULL && p.parent->picture.picture!=NULL)
	p.picture=&p.parent->picture;
	//If the picture isn't null then can we give it to the ThemeBlockStateInstance.
	if(p.picture!=NULL)
	obj->objects.push_back(p);
	}
	}

	void ThemePicture::draw(SDL_Surface dest,int x,int y,int animation,SDL_Rect clipRect){
	//Get the Picture.
	if(picture==NULL) return;
	int ex=0,ey=0,xx,yy,ww,hh;
	{
	vector<typeOffsetPoint> &v=offset.offsetData;
	if(offset.length==0 \|\| animation<v[0].frameDisplayTime){
	xx=v[0].x;
	yy=v[0].y;
	ww=v[0].w;
	hh=v[0].h;
	}else if(animation>=offset.length){
	int i=v.size()-1;
	xx=v[i].x;
	yy=v[i].y;
	ww=v[i].w;
	hh=v[i].h;
	}else{
	int t=animation-v[0].frameDisplayTime;
	for(unsigned int i=1;i<v.size();i++){
	int tt=t/v[i].frameDisplayTime;
	if(tt>=0 && tt<v[i].frameCount){
	xx=(int)((float)v[i-1].x+(float)(v[i].x-v[i-1].x)*(float)(tt+1)/(float)v[i].frameCount+0.5f);
	yy=(int)((float)v[i-1].y+(float)(v[i].y-v[i-1].y)*(float)(tt+1)/(float)v[i].frameCount+0.5f);
	ww=(int)((float)v[i-1].w+(float)(v[i].w-v[i-1].w)*(float)(tt+1)/(float)v[i].frameCount+0.5f);
	hh=(int)((float)v[i-1].h+(float)(v[i].h-v[i-1].h)*(float)(tt+1)/(float)v[i].frameCount+0.5f);
	break;
	}else{
	t-=v[i].frameCount*v[i].frameDisplayTime;
	}
	}
	}
	}

	//Draw the Picture.
	if(clipRect){
	int d;
	d=clipRect->x-ex;
	if(d>0){
	ex+=d;
	xx+=d;
	ww-=d;
	}
	d=clipRect->y-ey;
	if(d>0){
	ey+=d;
	yy+=d;
	hh-=d;
	}
	if(ww>clipRect->w) ww=clipRect->w;
	if(hh>clipRect->h) hh=clipRect->h;
	}
	if(ww>0&&hh>0){
	SDL_Rect r1={xx,yy,ww,hh};
	SDL_Rect r2={x+ex,y+ey,0,0};
	SDL_BlitSurface(picture,&r1,dest,&r2);
	}
	}

	//This method will scale the background picture (if needed and configured) to the current SCREEN_WIDTH and SCREEN_HEIGHT.
	void ThemeBackgroundPicture::scaleToScreen(){
	//Only scale if needed.
	if(scale){
	//Free the surface of the scaled picture, if scaled.
	if(picture!=cachedPicture)
	SDL_FreeSurface(picture);
	//Set src and destSize back to the initial cached value.
	srcSize=cachedSrcSize;
	destSize=cachedDestSize;

	//Scale the image.
	//Calculate the x and y factors.
	double xFactor=double(SCREEN_WIDTH)/double(100);
	double yFactor=double(SCREEN_HEIGHT)/double(100);

	//The default scaling method is chosen (destSize in precentages).
	destSize.x*=xFactor;
	destSize.w*=xFactor;

	destSize.y*=yFactor;
	destSize.h*=yFactor;

	//Now update the image.
	xFactor=(double(destSize.w)/double(srcSize.w));
	yFactor=(double(destSize.h)/double(srcSize.h));
	if(xFactor!=1 \|\| yFactor!=1){
	picture=zoomSurface(cachedPicture,xFactor,yFactor,0);
	//Also update the source size.
	srcSize.x*=xFactor;
	srcSize.y*=yFactor;
	srcSize.w*=xFactor;
	srcSize.h*=yFactor;
	}else{
	//We don't need to scale the image
	picture=cachedPicture;
	}
	}
	}

	void ThemeBackgroundPicture::draw(SDL_Surface *dest){
	//Check if the picture is visible.
	if(!(picture&&srcSize.w>0&&srcSize.h>0&&destSize.w>0&&destSize.h>0))
	return;

	//Calculate the draw area.
	int sx=(int)((float)destSize.x+currentX-cameraX*(float)camera.x+0.5f);
	int sy=(int)((float)destSize.y+currentY-cameraY*(float)camera.y+0.5f);
	int ex,ey;

	//Include repeating.
	if(repeatX){
	sx%=destSize.w;
	if(sx>0) sx-=destSize.w;
	ex=SCREEN_WIDTH;
	}else{
	if(sx<=-(int)destSize.w \|\| sx>=SCREEN_WIDTH) return;
	ex=sx+1;
	}
	if(repeatY){
	sy%=destSize.h;
	if(sy>0) sy-=destSize.h;
	ey=SCREEN_HEIGHT;
	}else{
	if(sy<=-(int)destSize.h \|\| sy>=SCREEN_HEIGHT) return;
	ey=sy+1;
	}

	//And finally draw the ThemeBackgroundPicture.
	for(int x=sx;x<ex;x+=destSize.w){
	for(int y=sy;y<ey;y+=destSize.h){
	SDL_Rect r={x,y,0,0};
	SDL_BlitSurface(picture,&srcSize,dest,&r);
	}
	}
	}

	bool ThemeBackgroundPicture::loadFromNode(TreeStorageNode* objNode,string themePath){
	//Load the picture.
	picture=loadImage(themePath+objNode->value[0]);
	//Store pointer to the cached picture.
	cachedPicture=picture;
	if(picture==NULL) return false;

	//Retrieve the source size.
	{
	vector<string> &v=objNode->attributes["srcSize"];
	if(v.size()>=4){
	srcSize.x=atoi(v[0].c_str());
	srcSize.y=atoi(v[1].c_str());
	srcSize.w=atoi(v[2].c_str());
	srcSize.h=atoi(v[3].c_str());
	}else{
	srcSize.x=0;
	srcSize.y=0;
	srcSize.w=picture->w;
	srcSize.h=picture->h;
	}

	//Cache the sourcesize.
	cachedSrcSize=srcSize;
	}

	//Retrieve the destination size.
	{
	vector<string> &v=objNode->attributes["destSize"];
	if(v.size()>=4){
	destSize.x=atoi(v[0].c_str());
	destSize.y=atoi(v[1].c_str());
	destSize.w=atoi(v[2].c_str());
	destSize.h=atoi(v[3].c_str());
	}else{
	destSize.x=0;
	destSize.y=0;
	destSize.w=100;
	destSize.h=100;
	}

	//Cache the destsize.
	cachedDestSize=destSize;
	}

	//Retrieve if we should scale to screen.
	{
	//Get scaleToScreen.
	vector<string> &v=objNode->attributes["scaleToScreen"];
	//Boolean if the image should be scaled, default is true.
	scale=true;
	if(!v.empty()){
	scale=atoi(v[0].c_str());
	}

	//Now scaleToScreen.
	//NOTE: We don't check if scaleToScreen is true or false since that is done in scaleToScreen();
	scaleToScreen();
	}

	//Retrieve if it should be repeated.
	{
	vector<string> &v=objNode->attributes["repeat"];
	if(v.size()>=2){
	repeatX=atoi(v[0].c_str())?true:false;
	repeatY=atoi(v[1].c_str())?true:false;
	}else{
	repeatX=true;
	repeatY=true;
	}
	}

	//Retrieve the speed.
	{
	vector<string> &v=objNode->attributes["speed"];
	if(v.size()>=2){
	speedX=atof(v[0].c_str());
	speedY=atof(v[1].c_str());
	}else{
	speedX=0.0f;
	speedY=0.0f;
	}
	}

	//Retrieve the camera speed.
	{
	vector<string> &v=objNode->attributes["cameraSpeed"];
	if(v.size()>=2){
	cameraX=atof(v[0].c_str());
	cameraY=atof(v[1].c_str());
	}else{
	cameraX=0.0f;
	cameraY=0.0f;
	}
	}

	//Done and nothing went wrong so return true.
	return true;
	}

	//Constructor.
	ThemeStack::ThemeStack(){
	}

	//Destructor.
	ThemeStack::~ThemeStack(){
	//Loop through the themes and delete them.
	for(unsigned int i=0;i<objThemes.size();i++)
	delete objThemes[i];
	}

	//Method that will destroy the ThemeStack.
	void ThemeStack::destroy(){
	//Loop through the themes and delete them.
	for(unsigned int i=0;i<objThemes.size();i++)
	delete objThemes[i];
	//Clear the vector to prevent dangling pointers.
	objThemes.clear();
	}

	//Method that will append a theme to the stack.
	//obj: The ThemeManager to add.
	void ThemeStack::appendTheme(ThemeManager* obj){
	objThemes.push_back(obj);
	//debug
	#if defined(DEBUG) \|\| defined(_DEBUG)
	cout<<"ThemeStack::appendTheme(): theme count="<<objThemes.size()<<endl;
	#endif
	}
	//Method that will remove the last theme added to the stack.
	void ThemeStack::removeTheme(){
	//Make sure that the stack isn't empty.
	if(!objThemes.empty()){
	delete objThemes.back();
	objThemes.pop_back();
	}
	}

	//Method that will append a theme that will be loaded from file.
	//fileName: The file to load the theme from.
	//Returns: Pointer to the newly added theme, NULL if failed.
	ThemeManager* ThemeStack::appendThemeFromFile(const string& fileName){
	//Create a new themeManager.
	ThemeManager* obj=new ThemeManager();

	//Let it load from the given file.
	if(!obj->loadFile(fileName)){
	//Failed thus delete the theme and return null.
	cerr<<"ERROR: Failed loading theme "<<fileName<<endl;
	delete obj;
	return NULL;
	}else{
	//Succeeded, add it to the stack and return it.
	objThemes.push_back(obj);
	return obj;
	}
	}

	//Method that is used to let the themes scale.
	void ThemeStack::scaleToScreen(){
	//Loop through the themes and call their scaleToScreen method.
	for(unsigned int i=0;i<objThemes.size();i++)
	objThemes[i]->scaleToScreen();
	}

	//Get a pointer to the ThemeBlock of a given block type.
	//index: The type of block.
	//Returns: Pointer to the ThemeBlock.
	ThemeBlock* ThemeStack::getBlock(int index,bool menu){
	//Loop through the themes from top to bottom.
	for(int i=objThemes.size()-1;i>=0;i--){
	//Get the block from the theme.
	ThemeBlock* obj=objThemes[i]->getBlock(index,menu);
	//Check if it isn't null.
	if(obj)
	return obj;
	}

	//Nothing found.
	return NULL;
	}
	//Get a pointer to the ThemeBlock of the shadow or the player.
	//isShadow: Boolean if it's the shadow
	//Returns: Pointer to the ThemeBlock.
	ThemeBlock* ThemeStack::getCharacter(bool isShadow){
	//Loop through the themes from top to bottom.
	for(int i=objThemes.size()-1;i>=0;i--){
	//Get the ThemeBlock from the theme.
	ThemeBlock* obj=objThemes[i]->getCharacter(isShadow);
	//Check if it isn't null.
	if(obj)
	return obj;
	}

	//Nothing found.
	return NULL;
	}
	//Get a pointer to the ThemeBackground of the theme.
	//Returns: Pointer to the ThemeBackground.
	ThemeBackground* ThemeStack::getBackground(bool menu){
	//Loop through the themes from top to bottom.
	for(int i=objThemes.size()-1;i>=0;i--){
	//Get the ThemeBackground from the theme.
	ThemeBackground* obj=objThemes[i]->getBackground(menu);
	//Check if it isn't null.
	if(obj)
	return obj;
	}

	//Nothing found.
	return NULL;
	}

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