> On 10 Nov 2015, at 00:40, Manfred Pock <[email protected]> wrote: > > Hi, > > 25 dpi not really useful to show on screen?
No - it was a test… > About "PDFBox isn’t really fast enough for real-time rendering, such as a PDF > viewer in AWT / Swing." > > For what else you will need a rendering module? Rendering to PNG or JPEG files is the majority use case. Most uses of PDFBox are server-side. > For printing? I think, 10 sec per Page is realy slow, also for printing. Well, that depends on the page. I can find you pages where even Acrobat could be that slow. > regarts, Manfred > > Am 05.11.2015 um 19:27 schrieb John Hewson: >>> On 2 Nov 2015, at 13:30, Manfred Pock <[email protected]> wrote: >>> >>> Hi, >>> >>> Am 02.11.2015 um 21:27 schrieb John Hewson: >>>>> On 2 Nov 2015, at 08:35, Manfred Pock <[email protected]> wrote: >>>>> >>>>> Hi, >>>>> >>>>> we render a image with the pdfbox-renderer: >>>>> >>>>> for example >>>>> renderImageWithDPI(Pi_pageIdx, 250, ImageType.RGB); >>>>> >>>>> 250dpi, is a good value beetween performance and rendering quality >>>> That’s a pretty high DPI, I’d expect PDFBox to take a while to render >>>> that. Is there any way you can reduce the DPI? >>> Not really, if you will use some zooming features like fit do screen width >>> and so one, you need this dpi value. We have also tried it with lower dpi >>> value, there ist not so an big difference. >> Just to be clear I’m not saying that this is a high DPI in general, but it’s >> high for PDFBox, if your goal is rendering performance. It sounds like you >> might be rendering the document at an excessive DPI and then scaling-down >> the BufferedImage - if so you’d be better of rendering at a lower DPI. >> >> Try rendering at a tiny DPI, such as 25, you should see great performance - >> if not, there might be something specific to that PDF file which is causing >> PDFBox problems. >> >> — John >> >>>>> and we show the bufferedimage in java (we also cache the image that we >>>>> don't need to rerender it always) >>>> PDFBox isn’t really fast enough for real-time rendering, such as a PDF >>>> viewer in AWT / Swing. >>>> >>>> — John >>> That are not good news. We have also testet other free java-pdf-libaries, >>> some are faster, but they don't have the same rendering quality and no one >>> can view so many kinds of pdf as pdfbox. There is pdfbox especial great. >>> >>> BR, Manfred >>> >>> --------------------------------------------------------------------- >>> 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] >> > > > --------------------------------------------------------------------- > 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]
