Hi, On 11 September 2012 03:17, Pierre-Loup A. Griffais <[email protected]> wrote: > On 09/10/2012 06:08 PM, Daniel Stone wrote: >> 'Best' might be bicubic. It might be nearest. It might be anything, >> it's just whatever the driver thinks will offer the best quality. >> >> Bicubic is not required to be offered, but it may be. > > I'm not very familiar with bicubic interpolation, but couldn't it be > achieved using the 'convolution' filter with the adequate kernel? (possibly > in several passes at different scales). AFAIK 'convolution' is always > provided and often accelerated.
None of Intel UXA, Radeon EXA or Nouveau EXA accelerate convolutions. They're not particularly widely used anyway (at least by Cairo et al), probably because no-one accelerates them. Cheers, Daniel _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel
