CDrawBuffer.h

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// SPDX-License-Identifier: LGPL-2.1-or-later OR GPL-2.0-or-later OR GPL-3.0-or-later OR LicenseRef-ACF-Commercial
#pragma once
 
 
// Qt includes
#include <QtGui/QPixmap>
#include <QtGui/QPainter>
 
 
// ACF includes
#include <istd/TDelPtr.h>
 
#include <iqt/iqt.h>
 
 
namespace iview
{
 
 
class CDrawBuffer: public QPixmap
{
public:
       typedef QPixmap BaseClass;
 
       CDrawBuffer();
 
       void Reset();
       
       bool IsCreated() const;
 
       void Create(const QPaintDevice& device, ibase::CSize size);
 
       void CopyRectTo(const i2d::CRect& source, QPainter& drawContext, istd::CIndex2d contextPos) const;
       
       void CopyRectTo(const i2d::CRect& source, QPaintDevice& device, istd::CIndex2d devicePos) const;
 
       QPainter& GetDrawContext();
 
protected:
       void EnsureDrawContext();
 
private:
       mutable istd::TDelPtr<QPainter> m_drawContextPtr;
};
 
 
// inline methods
 
inline CDrawBuffer::CDrawBuffer()
{
}
 
 
inline QPainter& CDrawBuffer::GetDrawContext()
{
       EnsureDrawContext();
 
       Q_ASSERT(m_drawContextPtr.IsValid());
 
       return *m_drawContextPtr;
}
 
 
} // namespace iview