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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) 2011-2015 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_SAFEOPENGLIMAGEHELPER_H
+#define RESOURCES_SAFEOPENGLIMAGEHELPER_H
+
+#include "localconsts.h"
+#include "main.h"
+
+#ifdef USE_OPENGL
+
+#ifndef GL_TEXTURE_RECTANGLE_ARB
+#define GL_TEXTURE_RECTANGLE_ARB 0x84F5
+#define GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB 0x84F8
+#endif
+
+#include "resources/imagehelper.h"
+
+#ifdef ANDROID
+#include <GLES/gl.h>
+#define GL_RGBA8 GL_RGBA8_OES
+#else
+#ifndef USE_SDL2
+#define GL_GLEXT_PROTOTYPES 1
+#endif
+#include <SDL_opengl.h>
+#endif
+
+class Dye;
+class Image;
+
+/**
+ * Defines a class for loading and storing images.
+ */
+class SafeOpenGLImageHelper final : public ImageHelper
+{
+ friend class CompoundSprite;
+ friend class Graphics;
+ friend class Image;
+
+ public:
+ SafeOpenGLImageHelper() :
+ mFreeTextureIndex(0)
+ {
+ }
+
+ A_DELETE_COPY(SafeOpenGLImageHelper)
+
+ ~SafeOpenGLImageHelper();
+
+ /**
+ * 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 *load(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() A_WARN_UNUSED
+ { return mTextureType; }
+
+ static int getInternalTextureType() A_WARN_UNUSED
+ { return mInternalTextureType; }
+
+ static void setInternalTextureType(const int n)
+ { mInternalTextureType = n; }
+
+ static void setBlur(const bool n)
+ { mBlur = n; }
+
+ static int mTextureType;
+
+ static int mInternalTextureType;
+
+ static int getTextureSize() A_WARN_UNUSED
+ { return mTextureSize; }
+
+ static void initTextureSampler(const GLint id);
+
+ static void setUseTextureSampler(const bool b)
+ { 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
+#endif // RESOURCES_SAFEOPENGLIMAGEHELPER_H