salvd.hxx

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 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#ifndef INCLUDED_VCL_INC_SALVD_HXX
#define INCLUDED_VCL_INC_SALVD_HXX
 
#include "salgeom.hxx"
 
class SalGraphics;
 
class VCL_PLUGIN_PUBLIC SalVirtualDevice
        : public SalGeometryProvider
{
public:
    SalVirtualDevice() {}
    virtual ~SalVirtualDevice() override;
 
    // SalGeometryProvider
    virtual bool IsOffScreen() const override { return true; }
 
    // SalGraphics or NULL, but two Graphics for all SalVirtualDevices
    // must be returned
    virtual SalGraphics*    AcquireGraphics() = 0;
    virtual void            ReleaseGraphics( SalGraphics* pGraphics ) = 0;
 
    // Set new size, without saving the old contents
    virtual bool            SetSize( tools::Long nNewDX, tools::Long nNewDY ) = 0;
 
    // Set new size using a buffer at the given address
    virtual bool            SetSizeUsingBuffer( tools::Long nNewDX, tools::Long nNewDY,
                                                sal_uInt8 * /* pBuffer */)
        {
            // Only the headless virtual device has an implementation that uses
            // pBuffer (and bTopDown).
            return SetSize( nNewDX, nNewDY );
        }
};
 
#endif // INCLUDED_VCL_INC_SALVD_HXX
 
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