Build an offscreen canvas from a saved whiteboard document.
The caller owns the returned canvas and must dispose() it.
dispose()
Returns undefined when the document is unreadable, or when it has nothing to draw and allowEmpty was not set.
undefined
allowEmpty
Build an offscreen canvas from a saved whiteboard document.
The caller owns the returned canvas and must
dispose()it.Returns
undefinedwhen the document is unreadable, or when it has nothing to draw andallowEmptywas not set.