However, to make the third part work, you currently have to activate some FreeType code which is potentially patented. It's rather straightforward to circumvent this by providing sub-pixel handling outside of FreeType (i.e. rasterizing with the horizontal resolution increased by a factor of three, then applying a non-patented color filter), but this isn't implemented in the X server, AFAIK. Maybe Erik can shed more light onto this issue.
Werner- Didn't you say at one point that it wasn't the filtering technique that was patented, but rather the specific variables (subpixel intensities) used in the filtering?
Yes, I think so.
If that's the case then you'd just have to make sure that the FIR 5 values are not patented. Based on my understanding of what MS is doing, they are in fact weighing colors differently based on how the human eye perceives them ( http://research.microsoft.com/pubs/68972/optfilt.pdf). This is certainly beyond anything Freetype is doing, as I understand it anyway.
I've again extended the CC list. David, can you comment? You've written FreeType's FIR code, so you probably know it best. Werner -- To unsubscribe, e-mail: opensuse-factory+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse-factory+owner@opensuse.org