[id] = pdf.GetBrushFromPage(id, page, brid[, transparent])
id to a vector brush using the identifier brid. If you pass Nil in brid, pdf.GetBrush()
will automatically choose a vacant identifier and return it.
The page to convert must be specified in the page argument. It must be a number in
the range of 1 to the total number of pages in the document and the page must have
been previously loaded using pdf.LoadPage(). The PDF document specified
by id must have been previously opened using pdf.OpenDocument().
The optional parameter transparent allows you to specify whether you'd like the
page background to be transparent or white. If you pass True here, you'll get a
vector brush in which the page background is completely transparent by using
alpha channel transparency. Otherwise the page background will be white and your
vector brush won't use any transparency.
Note that the vector brush will still depend on the PDF document so it is not allowed to call pdf.CloseDocument() on the document before freeing the brush. It also is not allowed to call pdf.FreePage() before freeing the brush.
If you want to convert a PDF page into a brush without being forced to load the page using pdf.LoadPage() first, use the pdf.GetBrush() function. See pdf.GetBrush for details.
Nil for auto id selectionTrue for a transparent page background, False for a white page backgroundNil as argument 3 (see above)