Add safeopenglimagehelper for using in safe opengl mode only.

1 files changed, 159 insertions, 0 deletions

diff --git a/src/resources/safeopenglimagehelper.h b/src/resources/safeopenglimagehelper.h
new file mode 100644
index 000000000..14de03913
--- /dev/null
+++ b/src/resources/safeopenglimagehelper.h
@@ -0,0 +1,159 @@
+/*
+ *  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