ImageSetMask Method (Obj)

public void SetMask(
	Obj mask
)

Public Sub SetMask ( 
	mask As Obj
)

public:
virtual void SetMask(
	[InAttribute] Obj^ mask
) sealed

function SetMask(mask);

Parameters

mask

Type: pdftron.SDFObj
is an Cos/SDF Array specifying a range of colors to be masked out. Samples in the image that fall within this range are not painted, allowing the existing background to show through. The effect is similar to that of the video technique known as chroma-key. For details of the Array format please refer to section 4.8.5 'Color Key Masking' in PDF Reference Manual.

Reference