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ImageManager.cpp
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ImageManager.cpp
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/****************************************************************************
** Copyright (C) 2011 Luka Horvat <redreaper132 at gmail.com>
** Copyright (C) 2011 Edward Lii <edward_iii at myway.com>
** Copyright (C) 2011 O. Bahri Gordebak <gordebak at gmail.com>
**
**
** This file may be used under the terms of the GNU General Public
** License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** You should have received a copy of the GNU General Public License
** along with this program. 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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