When writing our PDF to HTML5 and SVG font converter, the biggest headache has been making the fonts work (the PDF file format allows alsorts of interesting little ‘gotchas’ which need handling for the fonts to work in different browsers and Chrome, Safari, Firefox and IE all have their own ‘features’). We are very pleased with the general quality of the output from the conversion and much of our time is currently spent on these ‘corner cases’….
The second biggest headache has been choosing the font formats to use. Inside a PDF you can have OpenType, Truetype, and Postscript. So we started off by using the font format of the data. This is problematic because the font data often needs ‘tweaking’ (which often means rewriting large parts of the font data) and because not all Browsers support all font types. IE for example does not support Truetype (ironic as Microsoft invented the format)….
In our latest release, we have moved to a default font format of WOFF. This offers THREE key advantages:-
1. It is the best supported file format across all browsers.
2. It includes compression.
3. It allows us to standardise on one font format (no need for separate EOT conversion just for Internet Explorer).
You can still output as OTF and TFF files if required by we have made WOFF the default format. We hope you find it a good choice.
This post is part of our “Fonts Articles Index” in these articles we explore Fonts.
IDRsolutions develop a Java PDF library, a PDF forms to HTML5 converter, a PDF to HTML5 or SVG converter and a Java Image Library that doubles as an ImageIO replacement. On the blog our team post about anything interesting they learn about.