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ImageManager.cpp
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ImageManager.cpp
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/*
* Copyright (C) 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 "ImageManager.h"
#include <stdio.h>
SDL_Surface* ImageManager::loadImage(std::string file){
//Pointer to an SDL_Surface to which the image will be loaded.
SDL_Surface* load=NULL;
//This SDL_Surface is used to set the alpha correct.
SDL_Surface* opt=NULL;
//First check if the image isn't already in the imageCollection.
opt=imageCollection[file];
if(opt!=NULL)
return opt;
//Now load the image to load.
load=IMG_Load(file.c_str());
//Check if loading didn't fail.
if(load!=NULL){
//Check if there's an alpha mask.
if(load->format->Amask){
//There is so let opt use it.
opt=SDL_DisplayFormatAlpha(load);
//We don't need load anymore so free it.
SDL_FreeSurface(load);
}else{
//We use cyan for alpha, so set the alpha color key.
SDL_SetColorKey(load,SDL_SRCCOLORKEY,SDL_MapRGB(load->format,0,0xFF,0xFF));
//Let opt use the alpha.
opt=SDL_DisplayFormat(load);
//We don't need load anymore so free it.
SDL_FreeSurface(load);
}
}else{
//We couldn't load the image.
fprintf(stderr,"ERROR: Can't open image file %s\n",file.c_str());
return NULL;
}
//Add a pointer to the imageCollection.
imageCollection[file]=opt;
//And return the SDL_Surface*.
return opt;
}
ImageManager::~ImageManager(){
//We call destroy().
destroy();
}
void ImageManager::destroy(){
//Loop through the imageCollection and free them.
std::map<std::string,SDL_Surface*>::iterator i;
for(i=imageCollection.begin();i!=imageCollection.end();++i){
SDL_FreeSurface(i->second);
}
imageCollection.clear();
}

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