SquareGetOpacity Method

Return Value

Type: Double
A number indicating the opacity value corresponding to the annotation.

Implements

IMarkupGetOpacity

The constant opacity value shall be used in painting the annotation. This value shall apply to all visible elements of the annotation in its closed state (including its background and border) but not to the pop-up window that appears when the annotation is opened. The specified value shall not used if the annotation has an appearance stream in that case, the appearance stream shall specify any transparency. (However, if the compliant viewer regenerates the annotation’s appearance stream, it may incorporate the CA value into the stream’s content.) The implicit blend mode is Normal. Default value: 1.0. If no explicit appearance stream is defined for the annotation, it may bepainted by implementation-dependent means that do not necessarily conform to the PDF imaging model; in this case, the effect of this entry is implementation-dependent as well.