While browsing our blog and categorizing our posts I noticed there was generally a lot of articles that covered Interesting PDF bugs and thought that it would be a good idea to create a separate index about this category. It became clear that we have written far too much and it would be useful to…
I have been looking at a customer PDF file today which highlights how ‘elastic’ the PDF file specification can be…. In theory, all objects are pointed to by a reference so if you got to the byte offset for object 100, you would see 100 0 obj …… endobj The data starts with the reference…
I have been looking at a customer file which illustrates one of my least favourite features of the PDF file spec – the need to constantly check everything. Take for example the case of image data. In the customer PDF file I have an image. To make the maths simple, let us say it was…
I have been looking at a customer PDF where we did not display the filled lines on the page. Firing up my debug tools showed that the lines were being converted to shapes and the clip and the color was correct. So where are the lines? It turned out that because the lines had a…
Today’s article is a variation on an old favourite I have written about before. I have been investigating a PDF file which did not display correctly some text in our Java PDF viewer… So I opened up the PDF file (which claimed to be created by Microsoft Publisher 2010) and found the raw commands relating…
