delegateBeginSoftMaskComposite abstract method
void
delegateBeginSoftMaskComposite({})
The two halves of the soft-mask composite. The base runs the mask
group's drawMask() between them - through THIS device, so mask-group
strips bin (and flush) identically on every subclass.
Implementation
void delegateBeginSoftMaskComposite({
required bool luminosity,
required PdfRect backdrop,
required double backdropLuminance,
required double transferScale,
required double transferOffset,
});