qioscontext.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QIOSCONTEXT_H
#define QIOSCONTEXT_H
 
#include <QtCore/qloggingcategory.h>
#include <qpa/qplatformopenglcontext.h>
 
@class EAGLContext;
 
QT_BEGIN_NAMESPACE
 
class QIOSWindow;
 
class QIOSContext : public QObject, public QPlatformOpenGLContext
{
    Q_OBJECT
 
public:
    QIOSContext(QOpenGLContext *context);
    ~QIOSContext();
 
    QSurfaceFormat format() const override;
 
    void swapBuffers(QPlatformSurface *surface) override;
 
    bool makeCurrent(QPlatformSurface *surface) override;
    void doneCurrent() override;
 
    GLuint defaultFramebufferObject(QPlatformSurface *) const override;
    QFunctionPointer getProcAddress(const char *procName) override;
 
    bool isSharing() const override;
    bool isValid() const override;
 
private Q_SLOTS:
    void windowDestroyed(QObject *object);
 
private:
    QIOSContext *m_sharedContext;
    EAGLContext *m_eaglContext;
    QSurfaceFormat m_format;
 
    struct FramebufferObject {
        GLuint handle;
        GLuint colorRenderbuffer;
        GLuint depthRenderbuffer;
        GLint renderbufferWidth;
        GLint renderbufferHeight;
        bool isComplete;
    };
 
    static bool verifyGraphicsHardwareAvailability();
    static void deleteBuffers(const FramebufferObject &framebufferObject);
 
    FramebufferObject &backingFramebufferObjectFor(QPlatformSurface *) const;
    mutable QHash<QPlatformSurface *, FramebufferObject> m_framebufferObjects;
 
    bool needsRenderbufferResize(QPlatformSurface *) const;
};
 
QT_END_NAMESPACE
 
#endif // QIOSCONTEXT_H