ZDC_Off::ZDC_Off(const ZDC& inOther, bool inForceOffscreen)
: ZDC(inOther)
{
// Initially, we copy all settings from inOther, then we attempt to
// create a new offscreen canvas.
if (inForceOffscreen || !fCanvas->IsOffScreen())
{
ZRect canvasClipRect = this->GetClip().Bounds() + this->GetOrigin();
ZRef<ZDCCanvas> offCanvas;
try
{
// We allow the offscreen creation to fail if inForceOffscreen is false.
offCanvas = fCanvas->CreateOffScreen(canvasClipRect);
}
catch (...)
{
if (inForceOffscreen)
throw;
}
if (offCanvas && offCanvas->IsOffScreen())
{
fCanvas = offCanvas;
this->ZeroChangeCounts();
fState.fOriginComp = canvasClipRect.TopLeft();
this->SetOrigin(inOther.GetOrigin());
this->SetPatternOrigin(inOther.GetPatternOrigin());
this->SetClip(inOther.GetClip());
}
}
}
ZDC_Off::ZDC_Off(const ZDC& inOther, ZPoint inDimensions, ZDCPixmapNS::EFormatEfficient iFormat)
: ZDC(inOther)
{
ZRef<ZDCCanvas> offCanvas = fCanvas->CreateOffScreen(inDimensions, iFormat);
if (offCanvas && offCanvas->IsOffScreen())
{
fCanvas = offCanvas;
this->ZeroChangeCounts();
fState.fClip = ZRect(inDimensions);
fState.fOrigin = ZPoint::sZero;
fState.fPatternOrigin = ZPoint::sZero;
fState.fClipOrigin = ZPoint::sZero;
fState.fOriginComp = ZPoint::sZero;
}
}