doublebufferedarea.cpp

Symbian 第二版平台

/**
 *
 * @brief Definition of CDoubleBufferedArea
 *
 * Copyright (c) EMCC Software Ltd 2003
 * @version 1.0
 */

#include "DoubleBufferedArea.h"


// System includes
#include <bitdev.h>     // CFbsBitmapDevice
#include <bitstd.h>     // CFbsBitGc
#include <fbs.h>        // CFbsBitmap


CDoubleBufferedArea* CDoubleBufferedArea::NewL(TSize aSize, TDisplayMode aDisplayMode)
{
    CDoubleBufferedArea* self = new (ELeave) CDoubleBufferedArea();
    CleanupStack::PushL(self);
    self->ConstructL(aSize, aDisplayMode);
    CleanupStack::Pop();
    return self;
}

CDoubleBufferedArea* CDoubleBufferedArea::NewLC(TSize aSize, TDisplayMode aDisplayMode)
{
    CDoubleBufferedArea* self = new (ELeave) CDoubleBufferedArea();
    CleanupStack::PushL(self);
    self->ConstructL(aSize, aDisplayMode);
    return self;
}

CDoubleBufferedArea::CDoubleBufferedArea()
{
}


CDoubleBufferedArea::~CDoubleBufferedArea()
{
    delete iAreaBitmap;
    delete iAreaBitmapDevice;
    delete iAreaBitmapContext;
}

void CDoubleBufferedArea::ConstructL(TSize aSize, TDisplayMode aDisplayMode)
{
    //constructing offscreen play area:
    iAreaBitmap = new (ELeave) CFbsBitmap(); // in memory/offscreen bitmap
    iAreaBitmap->Create(aSize, aDisplayMode); // set size and display mode of bitmap
    iAreaBitmapDevice = CFbsBitmapDevice::NewL(iAreaBitmap); // create bitmap device
    iAreaBitmapDevice->CreateContext(iAreaBitmapContext); // create graphics context for drawing to bitmap
}

CFbsBitGc& CDoubleBufferedArea::GetDoubleBufferedAreaContext() const
{
     return *iAreaBitmapContext;
}

const CFbsBitmap& CDoubleBufferedArea::GetDoubleBufferedAreaBitmap() const
{
    return *iAreaBitmap;
}

void CDoubleBufferedArea::ClearBufferedArea()
{
    iAreaBitmapContext->Clear();
}

// End of File