FIFE 2008.0
image_loader.cpp
00001 /***************************************************************************
00002  *   Copyright (C) 2005-2008 by the FIFE team                              *
00003  *   http://www.fifengine.de                                               *
00004  *   This file is part of FIFE.                                            *
00005  *                                                                         *
00006  *   FIFE is free software; you can redistribute it and/or                 *
00007  *   modify it under the terms of the GNU Lesser General Public            *
00008  *   License as published by the Free Software Foundation; either          *
00009  *   version 2.1 of the License, or (at your option) any later version.    *
00010  *                                                                         *
00011  *   This library is distributed in the hope that it will be useful,       *
00012  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00013  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
00014  *   Lesser General Public License for more details.                       *
00015  *                                                                         *
00016  *   You should have received a copy of the GNU Lesser General Public      *
00017  *   License along with this library; if not, write to the                 *
00018  *   Free Software Foundation, Inc.,                                       *
00019  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
00020  ***************************************************************************/
00021 
00022 // Standard C++ library includes
00023 
00024 // 3rd party library includes
00025 #include <boost/scoped_array.hpp>
00026 #include <boost/scoped_ptr.hpp>
00027 #include <SDL.h>
00028 #include <SDL_image.h>
00029 
00030 // FIFE includes
00031 // These includes are split up in two parts, separated by one empty line
00032 // First block: files included from the FIFE root src directory
00033 // Second block: files included from the same folder
00034 #include "util/base/exception.h"
00035 #include "util/resource/resource_location.h"
00036 #include "util/resource/resource.h"
00037 #include "vfs/raw/rawdata.h"
00038 #include "vfs/vfs.h"
00039 #include "video/renderbackend.h"
00040 #include "video/image_location.h"
00041 
00042 #include "image_loader.h"
00043 
00044 namespace FIFE { 
00045     IResource* ImageLoader::loadResource(const ResourceLocation& location) {
00046         const ImageLocation* loc = dynamic_cast<const ImageLocation*>(&location);
00047 
00048         const std::string& filename = location.getFilename();
00049         boost::scoped_ptr<RawData> data (m_vfs->open(filename));
00050         size_t datalen = data->getDataLength();
00051         boost::scoped_array<uint8_t> darray(new uint8_t[datalen]);
00052         data->readInto(darray.get(), datalen);
00053         SDL_RWops* rwops = SDL_RWFromConstMem(darray.get(), datalen);
00054         SDL_Surface* surface = IMG_Load_RW(rwops, false);
00055         SDL_FreeRW(rwops);
00056         if( !surface ) {
00057             return 0;
00058         }
00059 
00060         Image* res = RenderBackend::instance()->createImage(surface);
00061         res->setResourceLocation(location);
00062         if (loc) {
00063             res->setXShift(loc->getXShift());
00064             res->setYShift(loc->getYShift());
00065         }
00066         res->setAlphaOptimizerEnabled(true);
00067         return res;
00068     };
00069 }
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