qwindowsbackingstore.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 QWINDOWSBACKINGSTORE_H
#define QWINDOWSBACKINGSTORE_H
 
#include <QtCore/qt_windows.h>
 
#include <qpa/qplatformbackingstore.h>
#include <QtCore/qscopedpointer.h>
 
QT_BEGIN_NAMESPACE
 
class QWindowsWindow;
class QWindowsNativeImage;
 
class QWindowsBackingStore : public QPlatformBackingStore
{
    Q_DISABLE_COPY_MOVE(QWindowsBackingStore)
public:
    QWindowsBackingStore(QWindow *window);
    ~QWindowsBackingStore() override;
 
    QPaintDevice *paintDevice() override;
    void flush(QWindow *window, const QRegion &region, const QPoint &offset) override;
    void resize(const QSize &size, const QRegion &r) override;
    bool scroll(const QRegion &area, int dx, int dy) override;
    void beginPaint(const QRegion &) override;
 
    HDC getDC() const;
 
    QImage toImage() const override;
 
private:
    QScopedPointer<QWindowsNativeImage> m_image;
    bool m_alphaNeedsFill;
};
 
QT_END_NAMESPACE
 
#endif // QWINDOWSBACKINGSTORE_H