kis_opengl.h

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/*
 *  SPDX-FileCopyrightText: 2007 Adrian Page <adrian@pagenet.plus.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
#ifndef KIS_OPENGL_H_
#define KIS_OPENGL_H_
 
#include <QtGlobal>
#include <QFlags>
 
#include <QSurfaceFormat>
#include <QStringList>
 
#include "kis_config.h"
#include <KisQStringListFwd.h>
 
#include "kritaui_export.h"
 
class QOpenGLContext;
class QString;
class QSurfaceFormat;
 
class KRITAUI_EXPORT KisOpenGL
{
public:
    enum FilterMode {
        NearestFilterMode,  // nearest
        BilinearFilterMode, // linear, no mipmap
        TrilinearFilterMode, // LINEAR_MIPMAP_LINEAR
        HighQualityFiltering // Mipmaps + custom shader
    };
 
    enum OpenGLRenderer {
        RendererNone = 0x00,
        RendererAuto = 0x01,
        RendererDesktopGL = 0x02,
        RendererOpenGLES = 0x04,
        RendererSoftware = 0x08
    };
    Q_DECLARE_FLAGS(OpenGLRenderers, OpenGLRenderer)
 
    enum AngleRenderer {
        AngleRendererDefault    = 0x0000,
        AngleRendererD3d11      = 0x0002,
        AngleRendererD3d9       = 0x0004,
        AngleRendererD3d11Warp  = 0x0008, // "Windows Advanced Rasterization Platform"
    };
 
    struct KRITAUI_EXPORT RendererConfig {
        QSurfaceFormat format;
        AngleRenderer angleRenderer = AngleRendererDefault;
 
        OpenGLRenderer rendererId() const;
    };
 
    enum XcbGLProviderProtocol {
        XCB_GLX = 0,
        XCB_EGL
    };
 
public:
    static RendererConfig selectSurfaceConfig(KisOpenGL::OpenGLRenderer preferredRenderer,
                                              KisConfig::RootSurfaceFormat preferredRootSurfaceFormat,
                                              KisConfig::CanvasSurfaceBitDepthMode preferredCanvasSurfaceBitMode,
                                              bool enableDebug);
 
    static void setDefaultSurfaceConfig(const RendererConfig &config);
 
    static OpenGLRenderer getCurrentOpenGLRenderer();
    static OpenGLRenderer getQtPreferredOpenGLRenderer();
    static OpenGLRenderers getSupportedOpenGLRenderers();
    static OpenGLRenderer getUserPreferredOpenGLRendererConfig();
    static void setUserPreferredOpenGLRendererConfig(OpenGLRenderer renderer);
    static QString convertOpenGLRendererToConfig(OpenGLRenderer renderer);
    static OpenGLRenderer convertConfigToOpenGLRenderer(QString renderer);
 
    static void initialize();
 
    static void initializeContext(QOpenGLContext *ctx);
 
    static const QString &getDebugText();
 
    static QStringList getOpenGLWarnings();
 
    static QString currentDriver();
    static bool supportsLoD();
    static bool hasOpenGL3();
    static bool hasOpenGLES();
    static bool supportsVAO();
 
    static bool hasOpenGL();
 
    static bool supportsFenceSync();
 
    static bool supportsBufferMapping();
 
    static bool forceDisableTextureBuffers();
    static bool shouldUseTextureBuffers(bool userPreference);
 
    static bool useTextureBufferInvalidation();
 
    static bool useFBOForToolOutlineRendering();
 
    static bool needsFenceWorkaround();
 
    static void testingInitializeDefaultSurfaceFormat();
    static void setDebugSynchronous(bool value);
 
    static void glInvalidateBufferData(uint buffer);
 
    static std::optional<XcbGLProviderProtocol> xcbGlProviderProtocol();
 
private:
    static void fakeInitWindowsOpenGL(KisOpenGL::OpenGLRenderers supportedRenderers, KisOpenGL::OpenGLRenderer preferredByQt);
 
    KisOpenGL();
 
 
};
 
#ifdef Q_OS_WIN
Q_DECLARE_OPERATORS_FOR_FLAGS(KisOpenGL::OpenGLRenderers);
#endif
 
Q_DECLARE_METATYPE(KisOpenGL::XcbGLProviderProtocol)
 
#endif // KIS_OPENGL_H_