openglimagehelper.h

Go to the documentation of this file.

/*
 * 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
 * Copyright (C) 2019-2021 Andrei Karas
 *
 * 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")
// ignore -Wredundant-decls for SDL 1.2
PRAGMA45(GCC diagnostic push)
PRAGMA45(GCC diagnostic ignored "-Wredundant-decls")
#include <SDL_opengl.h>
PRAGMA45(GCC diagnostic pop)
PRAGMA48(GCC diagnostic pop)
#ifdef HAVE_GLEXT
PRAGMA45(GCC diagnostic push)
PRAGMA45(GCC diagnostic ignored "-Wredundant-decls")
#include <GL/glext.h>
PRAGMA45(GCC diagnostic pop)
#endif // HAVE_GLEXT
#endif // ANDROID
 
class Dye;
class Image;
 
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;
 
 Image *load(SDL_RWops *const rw,
 Dye const &dye) override final A_WARN_UNUSED;
 
 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:
 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