Thanks for the guidance on not creating a PageDrawer. It was already in our codebase like that and I was adapting without checking examples until now. Since it was wrong, nevermind what I had before except to say that I was generating a transparent BufferedImage with it in 1.x and 2.0.0 from Feb.
Are both of these correct way to use PDFBox? With either of these on the latest SNAPSHOT, I'm getting a black background. 1. new PDFRenderer(document).renderPageToGraphics(0, graphics); 2. new PDFRenderer(document).renderImageWithDPI(0, resolution, ImageType.ARGB); With #1, I was able to make it work by writing a transparent background before renderPageToGraphics, but that is ugly of course. There's nothing special about the PDF and it works fine with the latest pdfbox-app.jar. Tilman, yes setting a black transparent background doesn't really make sense as a workaround, but given that I'm basically writing a couple lines and I'm using ARGB, I don't know what else could be wrong. For reference, I attached the PNG I get with my general code on 1.x and 2.0.0 from Feb (expected), and the black image converted to PNG that I'm getting with 2.0.0 latest. The PDF to generate these is attached too. On Wed, Aug 26, 2015 at 11:45 PM, Tilman Hausherr <[email protected]> wrote: > Am 27.08.2015 um 02:56 schrieb Jon Wu: > >> I'm getting a solid black background trying to convert a PDF to an ARGB >> BufferedImage after updating from 2.0.0-20150209.214830-1071 to >> 2.0.0-20150826.181706-1650. Is there any recent change that could be >> causing that? >> >> --- Working OK on 20150209 --- >> >> On 20150209, I had this and it worked fine - producing a transparent image >> once I converted to PNG using code like this: >> >> BufferedImage result = new BufferedImage(width, height, >> BufferedImage.TYPE_INT_ARGB); >> Graphics2D graphics = result.createGraphics(); >> new PageDrawer(new PDFRenderer(document), page).drawPage(graphics, >> mediaBox); >> > > That isn't the way you're supposed to use PDFBox. > > >> --- Updating to latest broke things --- >> >> When updating to the current snapshot, I simply changed the last line to >> use the new API: >> >> new PDFRenderer(document).renderPageToGraphics(0, graphics); >> >> Unfortunately, with this change + the newer version, I get a black >> background on my BufferedImage instead of a transparent one. >> >> I get the same issue when I do the following: >> >> new PDFRenderer(document).renderImageWithDPI(0, resolution, >> ImageType.ARGB); >> >> I'd normally think there's something wrong with my code, but this is the >> only change I've made. Is there something wrong with the rendering in the >> latest PDFBox? >> > > The best would be that you upload your PDF somewhere so we can have a look > at it. > > The current code starts with a default bufferedimage of the type you pass. > Non ARGB images are assigned a white background, the other images are kept > as is. > > >> --- Workaround --- >> >> With renderPageToGraphics, if I call graphics.setBackground(new Color(0, >> 0, >> 0, 0)); before rendering the page, I avoid this issue. However, it seems >> like this shouldn't be necessary. >> > > So you're setting a black transparent background. > > >> -- Cropping when rendering? --- >> >> As a side note, I sort of miss being able to conveniently crop the PDF >> before rendering with a rectangle, but maybe I should just be doing that >> in >> Graphics2D land. >> > > Tilman > > >> Thanks, >> Jon >> >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [email protected] > For additional commands, e-mail: [email protected] > >
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