> On 8 Mar 2016, at 10:14, Kevin Ternes <[email protected]> wrote: > > I am using ZXing to put a data matrix on each page of a workflow of documents > that I am sending to the mailroom like so: > > Given pdDocument, pdPage, String contents, size, x, y: > > BitMatrix bitMatrix = new DataMatrixWriter().encode(contents, > BarcodeFormat.DATA_MATRIX, size, size); > BufferedImage bufferedImage = > MatrixToImageWriter.toBufferedImage(bitMatrix); > PDImageXObject pdImageXObject = > LosslessFactory.createFromImage(pdDocument, bufferedImage); > PDPageContentStream pdPageContentStream = new > PDPageContentStream(pdDocument, pdPage, true, false); > pdPageContentStream.drawImage(pdImageXObject, x, y, size, size); > IOUtils.closeQuietly(pdPageContentStream); > > The data matrix needs to be sized and positioned with some precision on the > printed page to support the mailroom sorting/enveloping process. > But so far I have trouble with that because: > #1 - The source documents are of all inconsistent width/height on the page > #2 - To deal with #1, the mailroom printer drivers all specify a "Fit" option > which will shrink oversized pages and expand undersized pages. > > Can anyone suggest a solution so that I can get the data matrix sized and > positioned correctly regardless of the input size and "fitting"? > Using PDFBox-2.0.0-RC3.
So what you’re saying is that the mailroom takes your document and resizes it, meaning that the matrix image you’ve added ends up in the wrong place? If so, you have a two options: 1) resize the documents yourself first, so that the mailroom won’t make any changes, that way you can basically work with the final “fitted” document. PDFormXObject gives you the ability to embed content from other PDFs, so you could make one for each page, you can set a custom scaling matrix on the form to rescale the original page. 2) calculate the affine transform required to convert given PDF into a “fitted” document, then invert the affine transform and use that to scale your overlayed image. You’ll end up with a strange shaped overlay which when “fitted” will look exactly right. In either case, you need to know how the mailroom’s “fit” works, so that you can simulate it. — John > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
