I'll chase that clipping path idea a little. I've been working on what caused the test to fail for Testformular1.pdf which is in our test area. I'm starting to suspect the clipping path ... though I thought I was rigorously testing on the image rendering side.
I'll pull flyer.pdf from that issue into the test arena too ... Jeremias, if that doesn't get it, I'll find a way to get another test file to you. May not be able to post it to the group due to customer restrictions ... but I'll see. Thanks! 2009/5/1 Andreas Lehmkühler <[email protected]> > > > Jeremias Maerki schrieb: > > AFAIK, BDC/EMC (since PDF 1.2) are defined my the "Marked Content" > > chapter in the spec and are used primarily for identifying certain marks > > on a page. They are the basis for Tagged PDF. But they don't have an > > influence on the rendering. I've worked on that in FOP recently so I > > know a few things here. > > > > "Optional Content" has been introduced with PDF 1.5. It is used mainly > > for group content together, ex. layers in Illustrator. I haven't looked > > at OCG closely, yet, but they allow to show and hide certain marks > > (content groups). > > > > Anyway, if your test files render badly, I don't think it has to do with > > these features. If I understand this stuff correctly, the above is > > mainly about switching on and off the rendering of certain marks. If you > > like I can take a look at your test files that don't work properly and > > try to have a look myself. Maybe I can give you a hint where to look. > Perhaps it might be useful to have a look at the implementation of the > clipping operators. Some rendering of pdfs is improved but some are > getting worse, e.g. have a look at the flyer.pdf attached to PDFBOX-358. > Without clipping is looks quite perfect, but after enabling it some of > the content disappears or isn't rendered correct. Perhaps it is a > problem with the direction of the path and the winding rule which > describes in the end what area is painted or not?? > > > Andreas Lehmkühler > > On 01.05.2009 00:55:15 Daniel Wilson wrote: > >> Some of my stencil-masked documents are still rendering badly. > >> > >> The only operators they use that are not implemented are the BDC and EMC > >> operators -- the marked-content sequence begin and end operators > (section > >> 10.5). These are briefly discussed relative to XObjects as "Optional > >> Content" in section 4.10.3. > >> > >> I'm sure these things have some significance, but are they significant > to > >> rendering a flat image -- PNG, JPG, etc. ? Or should I be looking > elsewhere > >> for the outstanding problems? > >> > >> Thanks once again for your thoughts! > >> > >> Daniel Wilson > > > > > > > > > > Jeremias Maerki > > >
