qt-everywhere-src-5.14.1/qtbase/src/plugins/platforms/qnx/qqnxrasterwindow.h

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#ifndef QQNXRASTERWINDOW_H
#define QQNXRASTERWINDOW_H

#include "qqnxwindow.h"
#include "qqnxbuffer.h"

QT_BEGIN_NAMESPACE

class QQnxRasterWindow : public QQnxWindow
{
public:
    QQnxRasterWindow(QWindow *window, screen_context_t context, bool needRootWindow);

    void post(const QRegion &dirty);

    void scroll(const QRegion &region, int dx, int dy, bool flush=false);

    QQnxBuffer &renderBuffer();

    bool hasBuffers() const { return !bufferSize().isEmpty(); }

    void setParent(const QPlatformWindow *window) override;

    void adjustBufferSize();

protected:
    int pixelFormat() const override;
    void resetBuffers() override;

    // Copies content from the previous buffer (back buffer) to the current buffer (front buffer)
    void blitPreviousToCurrent(const QRegion &region, int dx, int dy, bool flush=false);

    void blitHelper(QQnxBuffer &source, QQnxBuffer &target, const QPoint &sourceOffset,
                    const QPoint &targetOffset, const QRegion &region, bool flush = false);

private:
    QRegion m_previousDirty;
    QRegion m_scrolled;
    int m_currentBufferIndex;
    int m_previousBufferIndex;
    QQnxBuffer m_buffers[MAX_BUFFER_COUNT];
};

QT_END_NAMESPACE

#endif // QQNXRASTERWINDOW_H