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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 final : 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 *const rw, Dye const &dye);
/**
* Loads an image from an SDL surface.
*/
Image *load(SDL_Surface *const tmpImage);
Image *createTextSurface(SDL_Surface *const tmpImage,
const 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(const int n)
{ mInternalTextureType = n; }
static void setBlur(const 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) const;
Image *glLoad(SDL_Surface *tmpImage);
static int mUseOpenGL;
static int mTextureSize;
static bool mBlur;
};
#endif
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