image.h

Linux系统下的《红色警戒》游戏

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 * Copyright (c) 2004, 2005 darkbits                        Js_./
 * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
 * Olof Naess閚 a.k.a jansem/yakslem                _asww7!uY`>  )\a//
 *                                                 _Qhm`] _f "'c  1!5m
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#ifndef GCN_IMAGE_HPP
#define GCN_IMAGE_HPP

#include <string>

#include "guichan/imageloader.h"
#include "guichan/platform.h"

namespace gcn
{
    /**
     * Holds an image. To be able to use this class you must first set an
     * ImageLoader in Image by calling
     * @code Image::setImageLoader(myImageLoader) @endcode
     * The function is static. If this is not done, the constructor taking a
     * filename will throw an exception. The ImageLoader you use must be
     * compatible with the Graphics object you use.
     *
     * EXAMPLE: If you use SDLGraphics you should use SDLImageLoader.
     *          Otherwise your program will crash in a most bizarre way.
     */
    class GCN_CORE_DECLSPEC Image
    {
    public:

        /**
         * Constructor.
         *
         * @param data the data of the image.
         * @param width the width of the image.     
         * @param height the height of the image.
         */
        Image(void* data, int width, int height);

        /**
         * Constructor.
         *
         * @param filename the filename of the image.
         * @throws Exception when no ImageLoader exists.
         */
        Image(const std::string& filename);

        /**
         * Destructor. Unloads the image with the ImageLoader,
         * if it was loaded with it.
         */
        virtual ~Image();
    
        /**
         * Gets the width of the Image.
         *
         * @return the image width
         */
        virtual int getWidth() const;

        /**
         * Gets the height of the Image.
         *
         * @return the image height
         */
        virtual int getHeight() const;

        /**
         * Gets the data of the Image. Image data can be different things
         * depending on what ImageLoader you use. If you for instance use the
         * SDLImageLoader then an SDL_Surface will be returned.
         *
         * @return a void pointer to the Image data. 
         * @see SDLImageLoader, AllegroImageLoader
         */
        virtual void* _getData() const;

        /**
         * Gets the ImageLoader used for loading Images.
         *
         * @return the ImageLoader used for loading Images.
         * @see SDLImageLoader, AllegroImageLoader
         */
        static ImageLoader* _getImageLoader();
        
        /**
         * Sets the ImageLoader to be used for loading images.
         *
         * IMPORTANT: The ImageLoader is static and MUST be set before loading
         *            images!
         *
         * @param imageLoader the ImageLoader to be used for loading images.
         * @see SDLImageLoader, AllegroImageLoader
         */
        static void setImageLoader(ImageLoader* imageLoader);
        
    protected:
        /**
         * Default constructor. It is protected so you can inherit
         * from this class.
         */
        Image();       
        void* mData;
        int mWidth;
        int mHeight;
        bool mLoadedWithImageLoader;
        static ImageLoader* mImageLoader;        
    };  
}

#endif // end GCN_IMAGE_HPP