tmw/src/resources/image.h

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/*
 *  The Mana World
 *  Copyright (C) 2004  The Mana World Development Team
 *
 *  This file is part of The Mana World.
 *
 *  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
 *  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
 */

#ifndef IMAGE_H
#define IMAGE_H

#include "main.h"

#include "resources/resource.h"

#include <SDL.h>

#ifdef USE_OPENGL

/* The definition of OpenGL extensions by SDL is giving problems with recent
 * gl.h headers, since they also include these definitions. As we're not using
 * extensions anyway it's safe to just disable the SDL version.
 */
#define NO_SDL_GLEXT

#include <SDL_opengl.h>
#endif

class Dye;
class Position;

class Image : public Resource
{
    friend class Graphics;
#ifdef USE_OPENGL
    friend class OpenGLGraphics;
#endif

    public:
        virtual ~Image();

        static Resource *load(void *buffer, unsigned bufferSize);

        static Resource *load(void *buffer, unsigned bufferSize,
                              Dye const &dye);

        static Image *load(SDL_Surface *);

        virtual void unload();

        virtual int getWidth() const
        { return mBounds.w; }

        virtual int getHeight() const
        { return mBounds.h; }

        virtual Image *getSubImage(int x, int y, int width, int height);

        virtual void setAlpha(float alpha);

        float getAlpha() const;

#ifdef USE_OPENGL

        static void setLoadAsOpenGL(bool useOpenGL);

        int getTextureWidth() const { return mTexWidth; }
        int getTextureHeight() const { return mTexHeight; }
        static int getTextureType() { return mTextureType; }
#endif

        Image *merge(Image *image, int x, int y);

    protected:
#ifdef USE_OPENGL
        Image(GLuint glimage, int width, int height,
              int texWidth, int texHeight);

        static int powerOfTwo(int input);
#endif
        Image(SDL_Surface *image);

        SDL_Rect mBounds;
        bool mLoaded;

#ifdef USE_OPENGL
        GLuint mGLImage;
        int mTexWidth, mTexHeight;

        static bool mUseOpenGL;
        static int mTextureType;
        static int mTextureSize;
#endif
        SDL_Surface *mImage;
        float mAlpha;
};

class SubImage : public Image
{
    public:
        SubImage(Image *parent, SDL_Surface *image,
                 int x, int y, int width, int height);
#ifdef USE_OPENGL
        SubImage(Image *parent, GLuint image, int x, int y,
                 int width, int height, int texWidth, int textHeight);
#endif

        ~SubImage();

        Image *getSubImage(int x, int y, int width, int height);

    private:
        Image *mParent;
};

#endif

---