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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) 2011-2019 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 RESOURCES_OPENGLIMAGEHELPER_H
#define RESOURCES_OPENGLIMAGEHELPER_H
#include "localconsts.h"
#ifdef USE_OPENGL
#ifndef GL_TEXTURE_RECTANGLE_ARB
#define GL_TEXTURE_RECTANGLE_ARB 0x84F5
#define GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB 0x84F8
#endif // GL_TEXTURE_RECTANGLE_ARB
#include "resources/imagehelper.h"
#ifdef ANDROID
#include <GLES/gl.h>
#define GL_RGBA8 GL_RGBA8_OES
#else // ANDROID
#ifndef USE_SDL2
#define GL_GLEXT_PROTOTYPES 1
#endif // USE_SDL2
#ifdef HAVE_GLEXT
#define NO_SDL_GLEXT
#endif // HAVE_GLEXT
PRAGMA48(GCC diagnostic push)
PRAGMA48(GCC diagnostic ignored "-Wshadow")
#include <SDL_opengl.h>
PRAGMA48(GCC diagnostic pop)
#ifdef HAVE_GLEXT
#include <GL/glext.h>
#endif // HAVE_GLEXT
#endif // ANDROID
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:
OpenGLImageHelper() :
mFreeTextureIndex(0U),
mTextures()
{
}
A_DELETE_COPY(OpenGLImageHelper)
~OpenGLImageHelper() override final;
/**
* 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.
*/
Image *load(SDL_RWops *const rw,
Dye const &dye) override final A_WARN_UNUSED;
/**
* Loads an image from an SDL surface.
*/
Image *loadSurface(SDL_Surface *const tmpImage) override final
A_WARN_UNUSED;
Image *createTextSurface(SDL_Surface *const tmpImage,
const int width, const int height,
const float alpha)
override final A_WARN_UNUSED;
// OpenGL only public functions
static int getTextureType() noexcept2 A_WARN_UNUSED
{ return mTextureType; }
static int getInternalTextureType() noexcept2 A_WARN_UNUSED
{ return mInternalTextureType; }
constexpr2 static void setInternalTextureType(const int n) noexcept2
{ mInternalTextureType = n; }
constexpr2 static void setBlur(const bool n) noexcept2
{ mBlur = n; }
static int mTextureType;
static int mInternalTextureType;
static int getTextureSize() noexcept2 A_WARN_UNUSED
{ return mTextureSize; }
static void initTextureSampler(const GLint id);
constexpr2 static void setUseTextureSampler(const bool b) noexcept2
{ mUseTextureSampler = b; }
static void invalidate(const GLuint textureId);
static void bindTexture(const GLuint texture);
SDL_Surface *create32BitSurface(int width,
int height) const override final;
void postInit() override final;
void copySurfaceToImage(const Image *const image,
const int x, const int y,
SDL_Surface *surface) const override final;
protected:
/**
* Returns the first power of two equal or bigger than the input.
*/
static int powerOfTwo(const int input) A_WARN_UNUSED;
static SDL_Surface *convertSurfaceNormalize(SDL_Surface *tmpImage,
int width, int height);
static SDL_Surface *convertSurface(SDL_Surface *tmpImage,
int width, int height);
Image *glLoad(SDL_Surface *tmpImage,
int width = 0, int height = 0) A_WARN_UNUSED;
GLuint getNewTexture();
static const size_t texturesSize = 10;
size_t mFreeTextureIndex;
GLuint mTextures[texturesSize];
static int mTextureSize;
static bool mBlur;
static bool mUseTextureSampler;
};
#endif // USE_OPENGL
#endif // RESOURCES_OPENGLIMAGEHELPER_H
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