graphicsmanager.h

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/*
 *  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
        { return mMaxVertices; }
 
        bool getUseAtlases() const noexcept2 A_WARN_UNUSED
        { return mUseAtlases; }
 
        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
        { return mUseTextureSampler; }
 
        static GLenum getLastError();
 
        static std::string errorToString(const GLenum error) A_WARN_UNUSED;
 
        static void logError();
 
        void updateDebugLog() const;
 
        std::string getGLVersion() const
        { return mGlVersionString; }
 
        static GLenum getLastErrorCached()
        { return mLastError; }
 
        constexpr2 static void resetCachedError() noexcept2
        { mLastError = GL_NO_ERROR; }
#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