qt-everywhere-src-5.14.1/qtbase/src/plugins/platforms/windows/qwindowsopenglcontext.h

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#ifndef QWINDOWSOPENGLCONTEXT_H
#define QWINDOWSOPENGLCONTEXT_H

#include <QtGui/qopenglcontext.h>
#include <qpa/qplatformopenglcontext.h>

QT_BEGIN_NAMESPACE

#ifndef QT_NO_OPENGL

class QWindowsOpenGLContext;

class QWindowsStaticOpenGLContext
{
    Q_DISABLE_COPY_MOVE(QWindowsStaticOpenGLContext)
public:
    static QWindowsStaticOpenGLContext *create();
    virtual ~QWindowsStaticOpenGLContext() = default;

    virtual QWindowsOpenGLContext *createContext(QOpenGLContext *context) = 0;
    virtual void *moduleHandle() const = 0;
    virtual QOpenGLContext::OpenGLModuleType moduleType() const = 0;
    virtual bool supportsThreadedOpenGL() const { return false; }

    // If the windowing system interface needs explicitly created window surfaces (like EGL),
    // reimplement these.
    virtual void *createWindowSurface(void * /*nativeWindow*/, void * /*nativeConfig*/, int * /*err*/) { return nullptr; }
    virtual void destroyWindowSurface(void * /*nativeSurface*/) { }

protected:
    QWindowsStaticOpenGLContext() = default;

private:
    static QWindowsStaticOpenGLContext *doCreate();
};

class QWindowsOpenGLContext : public QPlatformOpenGLContext
{
    Q_DISABLE_COPY_MOVE(QWindowsOpenGLContext)
public:
    // Returns the native context handle (e.g. HGLRC for WGL, EGLContext for EGL).
    virtual void *nativeContext() const = 0;

    // These should be implemented only for some winsys interfaces, for example EGL.
    // For others, like WGL, they are not relevant.
    virtual void *nativeDisplay() const { return nullptr; }
    virtual void *nativeConfig() const { return 0; }

protected:
    QWindowsOpenGLContext() = default;
};

#endif // QT_NO_OPENGL

QT_END_NAMESPACE

#endif // QWINDOWSOPENGLCONTEXT_H