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+/*
+ * The ManaPlus Client
+ * Copyright (C) 2004-2009 The Mana World Development Team
+ * Copyright (C) 2009-2010 The Mana Developers
+ * Copyright (C) 2011-2012 The ManaPlus Developers
+ *
+ * This file is part of The ManaPlus Client.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef OPENGLIMAGEHELPER_H
+#define OPENGLIMAGEHELPER_H
+
+#include "localconsts.h"
+#include "main.h"
+
+#include "resources/imagehelper.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
+#define GL_GLEXT_PROTOTYPES 1
+
+#include <SDL_opengl.h>
+#endif
+
+class Dye;
+class Image;
+
+/**
+ * Defines a class for loading and storing images.
+ */
+class OpenGLImageHelper : public ImageHelper
+{
+ friend class CompoundSprite;
+ friend class Graphics;
+ friend class Image;
+
+ public:
+ virtual ~OpenGLImageHelper()
+ { }
+
+ /**
+ * Loads an image from an SDL_RWops structure and recolors it.
+ *
+ * @param rw The SDL_RWops to load the image from.
+ * @param dye The dye used to recolor the image.
+ *
+ * @return <code>NULL</code> if an error occurred, a valid pointer
+ * otherwise.
+ */
+ Resource *load(SDL_RWops *rw, Dye const &dye);
+
+ /**
+ * Loads an image from an SDL surface.
+ */
+ Image *load(SDL_Surface *);
+
+ Image *createTextSurface(SDL_Surface *tmpImage, float alpha);
+
+ // OpenGL only public functions
+
+ /**
+ * Sets the target image format. Use <code>false</code> for SDL and
+ * <code>true</code> for OpenGL.
+ */
+ static void setLoadAsOpenGL(int useOpenGL);
+
+ static int getTextureType()
+ { return mTextureType; }
+
+ static int getInternalTextureType()
+ { return mInternalTextureType; }
+
+ static void setInternalTextureType(int n)
+ { mInternalTextureType = n; }
+
+ static void setBlur(bool n)
+ { mBlur = n; }
+
+ static int mTextureType;
+
+ static int mInternalTextureType;
+
+ /**
+ * Tells if the image was loaded using OpenGL or SDL
+ * @return true if OpenGL, false if SDL.
+ */
+ int useOpenGL();
+
+ protected:
+ /**
+ * Returns the first power of two equal or bigger than the input.
+ */
+ int powerOfTwo(int input);
+
+ Image *_GLload(SDL_Surface *tmpImage);
+
+ static int mUseOpenGL;
+ static int mTextureSize;
+ static bool mBlur;
+};
+
+#endif