Added heavily modified resource manager by zenogais that is currently using

Allegro to load/draw images. Only the login wallpaper is currently loaded
using the resource manager and the resource manager still waits with searching
for available files until they are asked for instead of indexing what is
available.

16 files changed, 691 insertions, 122 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 5589a5ff..962af4e7 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -36,6 +36,9 @@ tmw_SOURCES = sound/sound.cpp \
 	gui/windowcontainer.cpp \
 	net/network.cpp \
 	net/protocol.cpp \
+	resources/image.cpp \
+	resources/resource.cpp \
+	resources/resourcemanager.cpp \
 	astar.cpp \
 	being.cpp \
 	configuration.cpp \
diff --git a/src/configuration.cpp b/src/configuration.cpp
index 759a1fa9..074de7c6 100644
--- a/src/configuration.cpp
+++ b/src/configuration.cpp
@@ -24,6 +24,8 @@
 
 #include "configuration.h"
 #include <math.h>
+#include <iostream>
+#include <fstream>
 
 Configuration::OptionValue::OptionValue():
     numericValue(0.0f)
@@ -46,7 +48,7 @@ void Configuration::init(std::string filename) {
     iniOptions.clear();
 
     while (inFile.good()) {
-        getline(inFile, inBuffer, '\n');
+        std::getline(inFile, inBuffer, '\n');
 
         if (inBuffer.substr(0, 1) != INI_COMMENTER) {
             // Replace spaces with void
diff --git a/src/configuration.h b/src/configuration.h
index ef9c9fe2..28383765 100644
--- a/src/configuration.h
+++ b/src/configuration.h
@@ -29,8 +29,6 @@
 
 #include <map>
 #include <string>
-#include <iostream>
-#include <fstream>
 
 /**
  * INI configuration handler for reading (and writing).
diff --git a/src/graphic/image.cpp b/src/graphic/image.cpp
index 9d0d3cac..008c4017 100644
--- a/src/graphic/image.cpp
+++ b/src/graphic/image.cpp
@@ -24,37 +24,13 @@
 #include "image.h"
 
 
-// Image
-
-Image::Image(int offset_x, int offset_y) {
-    this->offset_x = offset_x;
-    this->offset_y = offset_y;
-}
-
-
-// RleImage
-
-RleImage::RleImage(RLE_SPRITE *src, int offset_x, int offset_y):
-    Image(offset_x, offset_y)
-{
-    this->src = src;
-}
-
-RleImage::~RleImage() {
-    destroy_rle_sprite(src);
-}
-
-void RleImage::draw(BITMAP *dest, int x, int y) {
-    draw_rle_sprite(dest, src, x + offset_x, y + offset_y);
-}    
-
-
 // VideoImage
 
 VideoImage::VideoImage(BITMAP *src, int offset_x, int offset_y):
-    Image(offset_x, offset_y)
+    src(src),
+    offset_x(offset_x),
+    offset_y(offset_y)
 {
-    this->src = src;
 }
 
 VideoImage::~VideoImage() {
@@ -73,22 +49,6 @@ void VideoImage::draw(BITMAP *dst, int x, int y) {
 
 // Spriteset
 
-Spriteset::Spriteset(std::string filename)
-{
-    DATAFILE *datafile = load_datafile(filename.c_str());
-    if (!datafile)error("Unable to load graphic file: " + filename);
-    int i = 0;
-    while (datafile[i].type != DAT_END) {
-        Image *temp_image;
-        temp_image = new RleImage(
-                (RLE_SPRITE*)datafile[i].dat,
-                getProperty(&datafile[i], DAT_ID('X','C','R','P')),
-                getProperty(&datafile[i], DAT_ID('Y','C','R','P')));
-        spriteset.push_back(temp_image);
-        i++;
-    }
-}
-
 Spriteset::Spriteset(BITMAP *bmp, int width, int height, int offx, int offy)
 {
     /*
diff --git a/src/graphic/image.h b/src/graphic/image.h
index 60e04eac..1bc43ef4 100644
--- a/src/graphic/image.h
+++ b/src/graphic/image.h
@@ -31,72 +31,17 @@
 #include "../log.h"
 
 /**
- * A class storing a single sprite in video memory if available,
- * else as a refernece to a RLE_SPRITE in a datafile.
- * The class stores the offsets needed to compensate the cropping
- * operated by the grabber utility.
+ * A video image stored in memory.
  */
-class Image {
-    public:
-        /**
-         * Creates an Image
-         * @param offset_x is the x offset from where to start drawing
-         * @param offset_y is the y offset from where to start drawing
-         */
-        Image(int offset_x, int offset_y);
-
-        /**
-         * Virtual function to draw a sprite
-         * @param dest is the destination bitmap on which to draw the sprite
-         * @param x is the horizontal position
-         * @param y is the vertical position
-         */ 
-        virtual void draw(BITMAP *dest, int x, int y) = 0;
-
-    protected:
-        // From where to start drawing
-        int offset_x, offset_y;
-};
-
-/**
- * A RLE sprite
- */
-class RleImage : public Image {
-    public:
-        /**
-         * Creates a RleSprite
-         * @param src is a reference to a RLE_SPRITE in a datafile
-         * @param offset_x is the x offset from where to start drawing
-         * @param offset_y is the y offset from where to start drawing
-         */
-        RleImage(RLE_SPRITE *src, int offset_x, int offset_y);
-
-        /**
-         * Destructor
-         */
-        virtual ~RleImage();
-
-        /**
-         * Draws a sprite
-         */
-        void draw(BITMAP *dest, int x, int y);
-
+class VideoImage {
     private:
-        // Reference to RLE_SPRITE
-        RLE_SPRITE *src;
-};
-
-/**
- * An image stored in video memory
- */
-class VideoImage : public Image {
-    private:
-        // Reference to bitmap stored in video memory
         BITMAP *src;
+        int offset_x, offset_y;
+
     public:
         /**
          * Creates a VideoImage
-         * @param src is a reference to a BITMAP in video memory
+         * @param src is a reference to a BITMAP
          * @param offset_x is the x offset from where to start drawing
          * @param offset_y is the y offset from where to start drawing
          */        
@@ -119,13 +64,7 @@ class VideoImage : public Image {
 class Spriteset {
     public:
         // Vector storing the whole spriteset.
-        std::vector<Image*> spriteset;
-
-        /**
-         * Load a datafile containing the spriteset
-         * @param filename is the path of the datafile
-         */
-        Spriteset(std::string filename);
+        std::vector<VideoImage*> spriteset;
 
         /*
          * Cuts the passed bitmap in a grid of sub bitmaps.
diff --git a/src/gui/char_select.cpp b/src/gui/char_select.cpp
index 259a01b9..87a30000 100644
--- a/src/gui/char_select.cpp
+++ b/src/gui/char_select.cpp
@@ -437,7 +437,7 @@ void charSelect()
         }
 
         // Draw background
-        blit(login_wallpaper, buffer, 0, 0, 0, 0, 800, 600);
+        login_wallpaper->draw(buffer, 0, 0);
 
         gui->update();
 
diff --git a/src/gui/char_server.cpp b/src/gui/char_server.cpp
index 82c5f05e..3b9d03c8 100644
--- a/src/gui/char_server.cpp
+++ b/src/gui/char_server.cpp
@@ -117,7 +117,7 @@ void char_server() {
 
     showServerList = 1;
     while (showServerList) {
-        blit(login_wallpaper, buffer, 0, 0, 0, 0, 800, 600);
+        login_wallpaper->draw(buffer, 0, 0);
         gui->update();
         blit(buffer, screen, 0, 0, 0, 0, 800, 600);
     }
diff --git a/src/gui/login.cpp b/src/gui/login.cpp
index b1e8b43e..6db212b2 100644
--- a/src/gui/login.cpp
+++ b/src/gui/login.cpp
@@ -131,7 +131,7 @@ void login() {
     LoginDialog *dialog = new LoginDialog();
 
     while (state == LOGIN) {
-        blit(login_wallpaper, buffer, 0, 0, 0, 0, 800, 600);
+        login_wallpaper->draw(buffer, 0, 0);
         gui->update();
         blit(buffer, screen, 0, 0, 0, 0, 800, 600);
         if (key[KEY_ESC]) {
diff --git a/src/main.cpp b/src/main.cpp
index 61de436f..663c2589 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -28,7 +28,7 @@
 #include "gui/ok_dialog.h"
 #include "./sound/sound.h"
 #include "./graphic/graphic.h"
-
+#include "resources/resourcemanager.h"
 #include <iostream>
 
 #ifdef __USE_UNIX98
@@ -77,7 +77,7 @@ SERVER_INFO *server_info;
 PLAYER_INFO *char_info = new PLAYER_INFO;
 
 Spriteset *hairset, *playerset;
-BITMAP *login_wallpaper;
+Image *login_wallpaper;
 
 char username[LEN_USERNAME];
 char password[LEN_PASSWORD];
@@ -222,7 +222,6 @@ void init_engine() {
             config.setValue("keyboard", "en");
             config.setValue("language", "");
             config.setValue("core_version", CORE_VERSION);
-
             config.setValue("host", "animesites.de");
             config.setValue("port", 6901);
             config.setValue("screen", 1);
@@ -294,7 +293,9 @@ void init_engine() {
         error("Not enough memory to create buffer");
     }
 
-    login_wallpaper = load_bitmap("data/graphic/login.bmp", NULL);
+    ResourceManager *resman = ResourceManager::getInstance();
+
+    login_wallpaper = resman->createImage("graphic/login.bmp");
     if (!login_wallpaper) error("Couldn't load login.bmp");
 
     BITMAP *playerbitmap = load_bitmap("data/graphic/playerset.bmp", NULL);
@@ -352,6 +353,7 @@ void exit_engine() {
     config.write(dir);
     delete dir;
     gui_exit();
+    ResourceManager::deleteInstance();
     destroy_bitmap(buffer);
     allegro_exit();
 }
@@ -390,7 +392,7 @@ int main() {
                 break;
             case ERROR:
                 // Redraw GUI
-                blit(login_wallpaper, buffer, 0, 0, 0, 0, 800, 600);
+                login_wallpaper->draw(buffer, 0, 0);
                 guiGraphics->setTarget(buffer);
                 gui->update();
                 blit(buffer, screen, 0, 0, 0, 0, 800, 600);
diff --git a/src/main.h b/src/main.h
index ba58b7f5..c65bc021 100644
--- a/src/main.h
+++ b/src/main.h
@@ -35,6 +35,7 @@
 #include "gui/login.h"
 #include "gui/gui.h"
 #include "graphic/image.h"
+#include "resources/image.h"
 #include "log.h"
 #include "game.h"
 #include "net/protocol.h"
@@ -82,7 +83,7 @@ typedef struct {
     short weapon;
 } PLAYER_INFO;
 
-extern BITMAP *login_wallpaper;
+extern Image *login_wallpaper;
 extern Spriteset *hairset, *playerset;
 extern char username[25];
 extern char password[25];
diff --git a/src/resources/image.cpp b/src/resources/image.cpp
new file mode 100644
index 00000000..8a37a4e1
--- /dev/null
+++ b/src/resources/image.cpp
@@ -0,0 +1,124 @@
+/*
+ *  The Mana World
+ *  Copyright 2004 The Mana World Development Team
+ *
+ *  This file is part of The Mana World.
+ *
+ *  The Mana World 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
+ *  any later version.
+ *
+ *  The Mana World 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 The Mana World; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  $Id$
+ */
+
+#include "../log.h"
+#include "image.h"
+#include <iostream>
+
+Image::Image(BITMAP *image):
+    image(image)
+{
+}
+
+Image::~Image()
+{
+    unload();
+}
+
+Image* Image::load(const std::string &filePath)
+{
+    // Attempt to use SDL_Image to load the file.
+    //image = IMG_Load(filePath.c_str());
+    std::cout << "Attempting to load image from " << filePath << std::endl;
+    BITMAP *image = load_bitmap(filePath.c_str(), NULL);
+
+    // Check if the file was opened and return the appropriate value.
+    if (!image) {
+        //log("Error", "Image load failed : %s", IMG_GetError());
+        log("Error", "Image load failed : %s", filePath.c_str());
+        return NULL;
+    }
+
+    return new Image(image);
+}
+
+void Image::unload()
+{
+    // Free the image surface.
+    if (image != NULL) {
+        //SDL_FreeSurface(image);
+        destroy_bitmap(image);
+        image = NULL;
+        loaded = false;
+    }
+}
+
+Image* Image::createSubImage(int x, int y, int width, int height)
+{
+    // Create a new clipped sub-image
+    return new SubImage(this, image, x, y, width, height);
+}
+
+bool Image::draw(BITMAP *screen, int x, int y)
+{
+    // Check that preconditions for blitting are met.
+    if (screen == NULL || image == NULL) return false;
+
+    // Draw the image onto the screen.
+    draw_sprite(screen, image, x, y);
+    //if (SDL_BlitSurface(image, NULL, screen, &screenRect) < 0) {
+    //    return false;
+    //}
+
+    return true;
+}
+
+SubImage::SubImage(Image *parent, BITMAP *image,
+        int x, int y, int width, int height):
+    Image(create_sub_bitmap(image, x, y, width, height)),
+    parent(parent)
+{
+    //this->image = create_sub_bitmap(image, x, y, width, height);
+    parent->incRef();
+    // Set up the clipping rectangle.
+    //clipRect.x = x;
+    //clipRect.y = y;
+    //clipRect.w = width;
+    //clipRect.h = height;
+}
+
+SubImage::~SubImage()
+{
+    if (image) {
+        destroy_bitmap(image);
+    }
+    parent->decRef();
+}
+
+void SubImage::unload()
+{
+}
+
+bool SubImage::draw(BITMAP *screen, int x, int y)
+{
+    // Check that drawing preconditions are satisfied.
+    if (screen == NULL || image == NULL) return false;
+
+    // Draw the image onto the screen.
+    draw_sprite(screen, image, x, y);
+    //if (SDL_BlitSurface(image, &clipRect, screen, &screenRect) < 0) {
+    //    return false;
+    //}
+
+    return true;
+}
diff --git a/src/resources/image.h b/src/resources/image.h
new file mode 100644
index 00000000..363dabde
--- /dev/null
+++ b/src/resources/image.h
@@ -0,0 +1,125 @@
+/*
+ *  The Mana World
+ *  Copyright 2004 The Mana World Development Team
+ *
+ *  This file is part of The Mana World.
+ *
+ *  The Mana World 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
+ *  any later version.
+ *
+ *  The Mana World 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 The Mana World; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  $Id$
+ */
+
+#ifndef _TMW_IMAGE_H
+#define _TMW_IMAGE_H
+
+#include "resource.h"
+//#include <SDL/SDL.h>
+#include <allegro.h>
+
+/**
+ * A clipped version of a larger image.
+ */
+class SubImage;
+
+/**
+ * Defines a class for loading and storing images.
+ */
+class Image : public Resource
+{
+    public:
+        /**
+         * Constructor.
+         */
+        Image(BITMAP *image);
+
+        /**
+         * Destructor.
+         */
+        virtual ~Image();
+
+        /**
+         * Loads an image.
+         * @param filePath The path to the image file to load.
+         * @return <code>true</code> if the image was loaded
+         * <code>false</code> otherwise.
+         */
+        static Image *load(const std::string &filePath);
+
+        /**
+         * Frees the resources created by SDL.
+         */
+        void unload();
+
+        /**
+         * Creates a new image with the desired clipping rectangle.
+         * @return <code>NULL</code> if creation failed and a valid
+         * object otherwise.
+         */
+        Image* createSubImage(int x, int y, int width, int height);
+
+        /**
+         * Attempts to blit the internal image onto the screen.
+         * @return <code>true</code> if the image was blitted properly
+         * <code>false</code> otherwise.
+         */
+        bool draw(BITMAP *screen, int x, int y);
+
+    protected:
+        //SDL_Rect screenRect;
+        //SDL_Surface *image;
+        BITMAP *image;
+};
+
+/**
+ * A clipped version of a larger image.
+ */
+class SubImage : public Image
+{
+    public:
+        /**
+         * Constructor.
+         */
+        //SubImage(SDL_Surface *timage, int x, int y, int width, int height);
+        SubImage(Image *parent, BITMAP *image,
+                int x, int y, int width, int height);
+
+        /**
+         * Destructor.
+         */
+        ~SubImage();
+
+        /**
+         * Redefines unload to not do anything.
+         */
+        void unload();
+
+        /**
+         * Draws the clipped image onto the screen.
+         * @return <code>true</code> if drawing was succesful
+         * <code>false</code> otherwise.
+         */
+        bool draw(BITMAP *screen, int x, int y);
+
+    private:
+        Image *parent;
+        //BITMAP *image;
+        //SDL_Rect clipRect;
+        //SDL_Rect screenRect;
+        //SDL_Surface *image;
+        //SDL_Surface *screen;
+        //unsigned int referenceCount;
+};
+
+#endif
diff --git a/src/resources/resource.cpp b/src/resources/resource.cpp
new file mode 100644
index 00000000..6b4a554f
--- /dev/null
+++ b/src/resources/resource.cpp
@@ -0,0 +1,57 @@
+/*
+ *  The Mana World
+ *  Copyright 2004 The Mana World Development Team
+ *
+ *  This file is part of The Mana World.
+ *
+ *  The Mana World 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
+ *  any later version.
+ *
+ *  The Mana World 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 The Mana World; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  $Id$
+ */
+
+#include "resource.h"
+
+Resource::Resource():
+    referenceCount(0)
+{ 
+}
+
+bool Resource::isLoaded() const
+{
+    return loaded;
+}
+
+void Resource::incRef()
+{
+    ++referenceCount;
+}
+
+bool Resource::decRef()
+{
+    /* Warning: There is still a serious problem with the object deleting
+     * itself and that is that the resource manager doesn't know about it
+     * currently, causing it to crash while trying to clean up. Don't use
+     * this function until that is solved. Probably we'll have to make it
+     * so that decrementing count goes through resource manager too.
+     */
+    --referenceCount;
+
+    if (!referenceCount) {
+        delete this;
+        return true;
+    }
+
+    return false;
+}
diff --git a/src/resources/resource.h b/src/resources/resource.h
new file mode 100644
index 00000000..f1252c12
--- /dev/null
+++ b/src/resources/resource.h
@@ -0,0 +1,73 @@
+/*
+ *  The Mana World
+ *  Copyright 2004 The Mana World Development Team
+ *
+ *  This file is part of The Mana World.
+ *
+ *  The Mana World 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
+ *  any later version.
+ *
+ *  The Mana World 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 The Mana World; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  $Id$
+ */
+
+#ifndef _TMW_RESOURCE_H
+#define _TMW_RESOURCE_H
+
+#include <string>
+//#include <SDL/SDL.h>
+
+/**
+ * A generic reference counted resource object.
+ */
+class Resource
+{
+    public:
+        /**
+         * Constructor
+         */
+        Resource();
+
+        /**
+         * Frees this objects internal resources.
+         */
+        virtual void unload() = 0;
+
+        /**
+         * Indicates whether or not a resource is loaded.
+         * @return <code>true</code> if resource is loaded 
+         * <code>false</code> otherwise.
+         */
+        virtual bool isLoaded() const;
+
+        /**
+         * Increments the internal reference count.
+         */
+        void incRef();
+
+        /**
+         * Decrements the reference count and deletes the object
+         * if no references are left.
+         * @return <code>true</code> if the object was deleted
+         * <code>false</code> otherwise.
+         */
+        bool decRef();
+
+    protected:
+        bool loaded;
+
+    private:
+        unsigned int referenceCount;
+};
+
+#endif
diff --git a/src/resources/resourcemanager.cpp b/src/resources/resourcemanager.cpp
new file mode 100644
index 00000000..1d65538f
--- /dev/null
+++ b/src/resources/resourcemanager.cpp
@@ -0,0 +1,179 @@
+/*
+ *  The Mana World
+ *  Copyright 2004 The Mana World Development Team
+ *
+ *  This file is part of The Mana World.
+ *
+ *  The Mana World 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
+ *  any later version.
+ *
+ *  The Mana World 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 The Mana World; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  $Id$
+ */
+
+#include "../log.h"
+#include "image.h"
+#include "resourcemanager.h"
+#include <iostream>
+
+#ifdef WIN32
+#include <direct.h>
+#else
+#include <unistd.h>
+#endif
+
+ResourceEntry::ResourceEntry():
+    resource(NULL)
+{
+}
+
+ResourceManager *ResourceManager::instance = NULL;
+
+ResourceManager::ResourceManager()
+{
+}
+
+ResourceManager::~ResourceManager()
+{
+    // Create our resource iterator.
+    std::map<std::string, ResourceEntry>::iterator iter = resources.begin();
+    int danglingResources = 0;
+    int danglingReferences = 0;
+
+    // Iterate through and release references until objects are deleted.
+    while (iter != resources.end()) {
+        Resource *res = iter->second.resource;
+        danglingResources++;
+        danglingReferences++;
+        while (!res->decRef()) {
+            danglingReferences++;
+        }
+        iter++;
+    }
+    resources.clear();
+
+#ifdef __DEBUG
+    std::cout << "ResourceManager::~ResourceManager() cleaned up " <<
+        danglingReferences << " references to " << danglingResources <<
+        " resources\n";
+#endif
+}
+
+Resource* ResourceManager::create(const E_RESOURCE_TYPE &type,
+        const std::string &idPath)
+{
+    // Check if the id exists, and return the value if it does.
+    std::map<std::string, ResourceEntry>::iterator resIter =
+        resources.find(idPath);
+
+    if (resIter != resources.end() && resIter->second.resource) {
+        resIter->second.resource->incRef();
+        return resIter->second.resource;
+    }
+
+    // Attempt to load the object if it doesn't exist.
+
+    // The filePath string.
+    std::string filePath = "";
+
+    // Retrieve the current path for this program.
+    char programPath[260];
+    getcwd(programPath, 260);
+
+    // Set the filePath variable to the appropriate value
+    // this is only if we're not using a packed file.
+#ifdef WIN32
+    // Flip all of the idPath '/' to '\'
+    unsigned int begPos = 0;
+    unsigned int endPos = idPath.find("/");
+    std::strstream result;
+
+    // Loop through and replace all the characters.
+    while (endPos != std::string::npos) {
+        result << idPath.substr(begPos, endPos - begPos);
+        result << "\\";
+
+        begPos = endPos + 1;
+        endPos = (unsigned int)idPath.find("/");
+    }
+
+    filePath = std::string(programPath) + std::string("\\data\\") +
+        std::string(result.str());
+#else
+    filePath = std::string(programPath) + std::string("/data/") + idPath;
+#endif
+
+    Resource *resource = NULL;
+
+    // Create an object of the specified type.
+    switch (type)
+    {
+        case MAP:
+            warning("Map resource not supported.");
+            break;
+        case MUSIC:
+            warning("Music resource not supported.");
+            break;
+        case IMAGE:
+            // Attempt to create and load our image object.
+            resource = reinterpret_cast<Resource*>(Image::load(filePath));
+            break;
+        case SCRIPT:
+            warning("Script resource not supported.");
+            break;
+        case TILESET:
+            warning("Tileset resource not supported.");
+            break;
+        case SOUND_EFFECT:
+            warning("Sound FX resource not supported.");
+            break;
+        default: 
+            warning("Unknown resource type");
+            break;
+    }
+
+    if (resource) {
+        resource->incRef();
+
+        // Create the resource entry for this object.
+        ResourceEntry entry;
+        entry.filePath = filePath;
+        entry.resource = resource;
+
+        resources[idPath] = entry;
+    }
+
+    // Return NULL if the object could not be created.
+    return resource;
+}
+
+Image *ResourceManager::createImage(const std::string &idPath)
+{
+    return (Image*)create(IMAGE, idPath);
+}
+
+ResourceManager* ResourceManager::getInstance()
+{
+    // Create a new instance if necessary.
+    if (instance == NULL) instance = new ResourceManager();
+
+    return instance;
+}
+
+void ResourceManager::deleteInstance()
+{
+    if (instance != NULL) {
+        delete instance;
+        instance = NULL;
+    }
+}
diff --git a/src/resources/resourcemanager.h b/src/resources/resourcemanager.h
new file mode 100644
index 00000000..f7b7ab2a
--- /dev/null
+++ b/src/resources/resourcemanager.h
@@ -0,0 +1,106 @@
+/*
+ *  The Mana World
+ *  Copyright 2004 The Mana World Development Team
+ *
+ *  This file is part of The Mana World.
+ *
+ *  The Mana World 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
+ *  any later version.
+ *
+ *  The Mana World 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 The Mana World; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  $Id$
+ */
+
+#ifndef _TMW_RESOURCE_MANAGER_H
+#define _TMW_RESOURCE_MANAGER_H
+
+#include <map>
+#include <string>
+#include "resource.h"
+
+/**
+ * A resource entry descriptor.
+ */
+struct ResourceEntry
+{
+    ResourceEntry();
+
+    Resource* resource;
+    std::string filePath;
+};
+
+/**
+ * A class for loading and managing resources.
+ */
+class ResourceManager
+{
+    public:
+        /**
+         * An enumeration of resource types.
+         */
+        enum E_RESOURCE_TYPE
+        {
+            MAP,
+            MUSIC,
+            IMAGE,
+            SCRIPT,
+            TILESET,
+            SOUND_EFFECT
+        };
+
+        /**
+         * Constructor.
+         */
+        ResourceManager();
+
+        /**
+         * Destructor.
+         */
+        ~ResourceManager();
+
+        /**
+         * Creates a resource and adds it to the resource map. The idPath is
+         * converted into the appropriate path for the current operating system
+         * and the resource is loaded.
+         *
+         * @param type The type of resource to load.
+         * @param idPath The resource identifier path.
+         * @return A valid resource or <code>NULL</code> if the resource could
+         *         not be loaded.
+         */
+        Resource *create(
+                const E_RESOURCE_TYPE &type,
+                const std::string &idPath);
+
+        /**
+         * Convenience wrapper around ResourceManager::create.
+         */
+        Image *createImage(const std::string &idPath);
+
+        /**
+         * Returns an instance of the class, creating one if it does not
+         * already exist.
+         */
+        static ResourceManager *getInstance();
+
+        /**
+         * Deletes the class instance if it exists.
+         */
+        static void deleteInstance();
+
+    private:
+        static ResourceManager *instance;
+        std::map<std::string, ResourceEntry> resources;
+};
+
+#endif