Can somebody recommend the best (and preferably portable) way to render HTML documents onto a bitmap? As far as I understand my main 2 options are WebKit and Gecko, but I wasn't able to find a good starting point on how to do it. When I last tried doing this 5 years ago, I ended up using Gecko to send the document to a printer, which is not really what I need. I need rendering to a in-memory bitmap.
To clarify: server side, no Java, no .NET, batch processing, performance, not interactive, no Javascript.
The most promising solution I found so far is this http://sites.google.com/site/torisugari/commandlineprint2 extension for Firefox which adds a command line option for printing a file to a printer, PNG, PostScript or PDF file.