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Java and anti-aliasing

Anti-aliasing is the processes of making the edges of lines on shapes or text less jagged. This is done by fooling the eye –...
Mark Stephens
1 min read

How to extract JPG data from PDF

It is actually possible to extract some raw images from the PDF file. In general, images do not exist inside a PDF file –...
Mark Stephens
1 min read

Why writing a PDF parser is such a ‘challenging’…

In theory the PDF file format is specified in detail and is very precise. In practice, you meet alsorts of ‘interesting problems’ – the...
Mark Stephens
1 min read

How are PDF files protected?

Access to PDF files can be secured so that not just anyone can open them. This is achieved by encryption – the bytes in...
Mark Stephens
1 min read

What are PDF Image Masks?

The PDF Mask features offer a whole set of functionality to allow complicated image drawing to happen. Rather than just sticking an image on...
Mark Stephens
1 min read