/*

 *  The ManaPlus Client

 *  Copyright (C) 2012-2019  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 GRAPHICSMANAGER_H

#define GRAPHICSMANAGER_H

#include "localconsts.h"

#ifdef USE_OPENGL

#ifdef ANDROID

#include <GLES/gl.h>

#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

// hack to hide warnings

#undef GL_GLEXT_VERSION

#undef GL_GLEXT_PROTOTYPES

#endif  // ANDROID

#endif  // USE_OPENGL

#include "sdlshared.h"

#include "utils/stringvector.h"

#include <set>

class TestMain;

struct FBOInfo;

#ifdef USE_SDL2

struct SDL_Renderer;

#endif  // USE_SDL2

struct SDL_Window;

class GraphicsManager final

{

    public:

        GraphicsManager();

        A_DELETE_COPY(GraphicsManager)

        ~GraphicsManager();

        void createRenderers();

        static void deleteRenderers();

        void initGraphics();

        static void setVideoMode();

        static SDL_Window *createWindow(const int w, const int h,

                                        const int bpp, const int flags);

#ifdef USE_SDL2

        SDL_Renderer *createRenderer(SDL_Window *const window,

                                     const int flags);

#endif  // USE_SDL2

        bool getAllVideoModes(StringVect &modeList);

        void detectPixelSize();

        std::string getDensityString() const;

        int getDensity() const

        { return mDensity; }

#ifdef USE_OPENGL

        TestMain *startDetection() A_WARN_UNUSED;

        int detectGraphics() A_WARN_UNUSED;

        bool supportExtension(const std::string &ext) const A_WARN_UNUSED;

        static void updateTextureFormat();

        void updateTextureCompressionFormat() const;

        bool checkGLVersion(const int major, const int minor)

                            const A_WARN_UNUSED;

        bool checkGLesVersion(const int major, const int minor)

                              const A_WARN_UNUSED;

        bool checkSLVersion(const int major, const int minor)

                            const A_WARN_UNUSED;

        bool checkPlatformVersion(const int major, const int minor)

                                  const A_WARN_UNUSED;

        static void createFBO(const int width, const int height,

                              FBOInfo *const fbo);

        static void deleteFBO(FBOInfo *const fbo);

        void initOpenGLFunctions();

        void updateExtensions();

        void updatePlanformExtensions();

        void initOpenGL();

        void updateLimits();

        int getMaxVertices() const noexcept2 A_WARN_UNUSED

        bool getUseAtlases() const noexcept2 A_WARN_UNUSED

        void logVersion() const;

        void setGLVersion();

        static std::string getGLString(const int num) A_WARN_UNUSED;

        static void logString(const char *const format,

                              const int num) A_NONNULL(1);

        void detectVideoSettings();

        void createTextureSampler();

        bool isUseTextureSampler() const noexcept2 A_WARN_UNUSED

        static GLenum getLastError();

        static std::string errorToString(const GLenum error) A_WARN_UNUSED;

        static void logError();

        void updateDebugLog() const;

        std::string getGLVersion() const

        static GLenum getLastErrorCached()

        constexpr2 static void resetCachedError() noexcept2

#endif  // USE_OPENGL

    private:

        std::set<std::string> mExtensions;

        std::set<std::string> mPlatformExtensions;

        std::string mGlVersionString;

        std::string mGlVendor;

        std::string mGlRenderer;

        std::string mGlShaderVersionString;

#ifdef USE_OPENGL

        static GLenum mLastError;

#endif  // USE_OPENGL

        int mMinor;

        int mMajor;

        int mSLMinor;

        int mSLMajor;

        int mPlatformMinor;

        int mPlatformMajor;

        int mMaxVertices;

        int mMaxFboSize;

        uint32_t mMaxWidth;

        uint32_t mMaxHeight;

        uint32_t mWidthMM;

        uint32_t mHeightMM;

        int32_t mDensity;

#ifdef USE_OPENGL

        bool mUseTextureSampler;

        GLuint mTextureSampler;

        int mSupportDebug;

        bool mSupportModernOpengl;

        bool mGles;

#endif  // USE_OPENGL

        bool mUseAtlases;

};

extern GraphicsManager graphicsManager;

#endif  // GRAPHICSMANAGER_H