Technology allows everybody to do their own work without assistance. When office automation software programs allowed office workers to create professional quality documents, graphic artists had to take the sophistication of high-concept design up to the next level, above the abilities of office tools.
One of the key techniques has been the heavy usage of transparency. Consequently, commercial printers see a large number of documents containing transparency. The specification of transparency in PDF is very sophisticated, well above to the simple transparency used for example in video games.
Therefore, adding transparency to a GPU-based RIP is quite a challenging task. Indeed, not only has the complex PDF transparency to be implemented, but it also necessary to implement an ICC color management module on the GPU. And it all has to work on tiled images.
At the Electronic Imaging Symposium, John Ludd Recker from HP Labs will report on his experience implementing GPU-based transparency in Ghostscript. His lecture on A GPU accelerated PDF transparency engine will be in the Conference on Parallel Processing for Imaging Applications.