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/*
* The Mana Client
* Copyright (C) 2004-2009 The Mana World Development Team
* Copyright (C) 2009-2012 The Mana Developers
*
* This file is part of The Mana 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 IMAGE_H
#define IMAGE_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;
/**
* Defines a class for loading and storing images.
*/
class Image : public Resource
{
friend class SDLGraphics;
#ifdef USE_OPENGL
friend class OpenGLGraphics;
#endif
public:
~Image() override;
/**
* Loads an image from an SDL_RWops structure.
*
* @param rw The SDL_RWops to load the image from.
*
* @return <code>NULL</code> if an error occurred, a valid pointer
* otherwise.
*/
static Resource *load(SDL_RWops *rw);
/**
* 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.
*/
static Resource *load(SDL_RWops *rw, Dye const &dye);
/**
* Loads an image from an SDL surface.
*/
static Image *load(SDL_Surface *);
/**
* Frees the resources created by SDL.
*/
void unload();
/**
* Tells is the image is loaded
*/
bool isLoaded() const
{ return mLoaded; }
/**
* Returns the width of the image.
*/
int getWidth() const
{ return mBounds.w; }
/**
* Returns the height of the image.
*/
int getHeight() const
{ return mBounds.h; }
/**
* Tells if the system is using OpenGL or SDL
* @return true if OpenGL, false if SDL.
*/
static bool useOpenGL();
/**
* Sets the alpha value of this image.
*/
void setAlpha(float alpha);
/**
* Returns the alpha value of this image.
*/
float getAlpha() const
{ return mAlpha; }
/**
* Creates a new image with the desired clipping rectangle.
*
* @return <code>NULL</code> if creation failed and a valid
* object otherwise.
*/
Image *getSubImage(int x, int y, int width, int height);
// SDL only public functions
/**
* Disable the transparency handling (for low CPUs in SDL Mode)
*/
static void SDLdisableTransparency()
{ mDisableTransparency = true; }
static bool SDLisTransparencyDisabled()
{ return mDisableTransparency; }
static void setRenderer(SDL_Renderer *renderer);
#ifdef USE_OPENGL
// OpenGL only public functions
/**
* Sets the target image format. Use <code>false</code> for SDL and
* <code>true</code> for OpenGL.
*/
static void setLoadAsOpenGL(bool useOpenGL);
static bool getLoadAsOpenGL() { return mUseOpenGL; }
int getTextureWidth() const { return mTexWidth; }
int getTextureHeight() const { return mTexHeight; }
static int getTextureType() { return mTextureType; }
#endif
protected:
// -----------------------
// Generic protected members
// -----------------------
SDL_Rect mBounds;
bool mLoaded = false;
float mAlpha = 1.0f;
// -----------------------
// SDL protected members
// -----------------------
/** SDL Constructor */
Image(SDL_Texture *texture, int width, int height);
/** SDL_Surface to SDL_Texture Image loader */
static Image *_SDLload(SDL_Surface *tmpImage);
SDL_Texture *mTexture = nullptr;
/** Stores whether the transparency is disabled */
static bool mDisableTransparency;
static SDL_Renderer *mRenderer;
// -----------------------
// OpenGL protected members
// -----------------------
#ifdef USE_OPENGL
/**
* OpenGL Constructor.
*/
Image(GLuint glimage, int width, int height,
int texWidth, int texHeight);
/**
* Returns the first power of two equal or bigger than the input.
*/
static int powerOfTwo(int input);
static Image *_GLload(SDL_Surface *image);
GLuint mGLImage = 0;
int mTexWidth, mTexHeight;
static bool mUseOpenGL;
static bool mPowerOfTwoTextures;
static int mTextureType;
static int mTextureSize;
#endif
};
/**
* A clipped version of a larger image.
*/
class SubImage : public Image
{
public:
SubImage(Image *parent, SDL_Texture *texture,
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() override;
private:
ResourceRef<Image> mParent;
};
#endif
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