Hosting courtesy of Sourceforge

               

---

ImageManager.cpp

Go to the documentation of this file.

//
//      Copyright (C) 2002 Robert Renaud
//
//      This program 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 2
//      of the License, or (at your option) any later version.
//
//      This program 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 this program; if not, write to the Free Software
//      Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//

#include "ImageManager.h"

using namespace Graphics;

ImageManager* ImageManager::instance = NULL;

ImageManager* ImageManager::getInstance() {
        if (instance == NULL) {
                instance = new ImageManager;
        }
        return instance;
}

ImageManager::ImageManager() { }

ImageManager::~ImageManager() {
        freeAll();
}

SDL_Surface* ImageManager::getImage(const string& str) {
        #ifdef DEBUG_GRAPHICS_IMAGE_MANAGER
                debugOut << "ImageManager::getImage(), ";
        #endif  
        mapStrSurf::iterator i = nameReferenceTable.find(str);
        if (i != this->nameReferenceTable.end()) { // string found in map       
                #ifdef DEBUG_GRAPHICS_IMAGE_MANAGER
                        debugOut << str << " found in table" << endl;
                #endif
                return i->second; 
        } else { // string not found in map
        
                #ifdef DEBUG_GRAPHICS_IMAGE_MANAGER
                        debugOut << str << " not found in table, being allocated now" << endl;
                #endif
                SDL_Surface* newSurf = SDL_LoadBMP(str.c_str());
                if (newSurf == NULL) throw Util::GeneralException(std::string("BMP not loaded successfully ") + str.c_str(), __FILE__, __LINE__);
                nameReferenceTable[str] = newSurf;
                return newSurf;
        }
}

void ImageManager::freeBMP(SDL_Surface* surf) {
        // linear search, will make this faster if profiling finds need to
        for (mapStrSurf::iterator i = nameReferenceTable.begin();i != nameReferenceTable.end(); i++) {
                if (i->second == surf) {
                        removeFromTable(i);
                        return;
                }
        }
        // if it reaches here, there wasno entry is in the list
}

void ImageManager::freeBMP(const string& str) {
        mapStrSurf::iterator i = nameReferenceTable.find(str);
        if (i != this->nameReferenceTable.end()) {
                removeFromTable(i);
                return;
        }
}

void ImageManager::removeFromTable(mapStrSurf::iterator &i) {
        SDL_FreeSurface(i->second);
        this->nameReferenceTable.erase(i);
}

void ImageManager::destroy() {
        delete instance;  // deleting null harmless, no need to check
}

void ImageManager::freeAll() {
        #ifdef DEBUG_GRAPHICS_IMAGE_MANAGER
                debugOut << "ImageManager::freeAll() called, freeing images from following files\n [ ";
        #endif

        for (mapStrSurf::iterator i = nameReferenceTable.begin(); i != nameReferenceTable.end(); i++) {
                if (i->second != NULL) { // there is an allocated surface here
                        SDL_FreeSurface(i->second);
                        #ifdef DEBUG_GRAPHICS_IMAGE_MANAGER
                                debugOut << i->first << ", \t";
                        #endif
                }
        }
        nameReferenceTable.clear();
        
        #ifdef DEBUG_GRAPHICS_IMAGE_MANAGER
                debugOut << "]" << endl;
        #endif
}

#ifdef DEBUG_GRAPHICS_IMAGE_MANAGER
void ImageManager::debugPrintPairs() {
        debugOut << "printing pairs (name, surf) of reference table " << endl;
        for (mapStrSurf::iterator i = nameReferenceTable.begin(); i != nameReferenceTable.end(); ++i) {
                debugOut <<  "( " << i->first << ", " << i->second << " ) \t";
        }
        debugOut << endl;
}
#endif

---