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#ifndef QIOSCONTEXT_H
#define QIOSCONTEXT_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 Q_DECL_OVERRIDE;

    void swapBuffers(QPlatformSurface *surface) Q_DECL_OVERRIDE;

    bool makeCurrent(QPlatformSurface *surface) Q_DECL_OVERRIDE;
    void doneCurrent() Q_DECL_OVERRIDE;

    GLuint defaultFramebufferObject(QPlatformSurface *) const Q_DECL_OVERRIDE;
    QFunctionPointer getProcAddress(const QByteArray &procName) Q_DECL_OVERRIDE;

    bool isSharing() const Q_DECL_OVERRIDE;
    bool isValid() const Q_DECL_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 void deleteBuffers(const FramebufferObject &framebufferObject);

    FramebufferObject &backingFramebufferObjectFor(QPlatformSurface *) const;
    mutable QHash<QIOSWindow *, FramebufferObject> m_framebufferObjects;
};

QT_END_NAMESPACE

#endif // QIOSCONTEXT_H