Re: [Pixman] [PATCH 0/2] 7-bit bilinear interpolation precision

2012-07-05 Thread Siarhei Siamashka
On Sun, Jul 1, 2012 at 12:25 AM, Søren Sandmann sandm...@cs.au.dk wrote: Siarhei Siamashka siarhei.siamas...@gmail.com writes: On Tue, Jun 26, 2012 at 6:13 AM, Jeff Muizelaar jmuizel...@mozilla.com wrote: We recently switched to using the same precision as Skia on Android. (4 bits for RGBA32

Re: [Pixman] [PATCH 0/2] 7-bit bilinear interpolation precision

2012-07-05 Thread Siarhei Siamashka
On Thu, 05 Jul 2012 12:25:55 -0700 Bill Spitzak spit...@gmail.com wrote: On 07/05/2012 12:22 AM, Siarhei Siamashka wrote: Separable scaling is good idea, but it is not a silver bullet. Downscaling is still a valid use case, and separable scaling would provide no reduction for the number

Re: [Pixman] [PATCH 0/2] 7-bit bilinear interpolation precision

2012-07-05 Thread Siarhei Siamashka
On Fri, 6 Jul 2012 00:08:46 +0300 Siarhei Siamashka siarhei.siamas...@gmail.com wrote: On Thu, 05 Jul 2012 12:25:55 -0700 Bill Spitzak spit...@gmail.com wrote: On 07/05/2012 12:22 AM, Siarhei Siamashka wrote: Separable scaling is good idea, but it is not a silver bullet.

Re: [Pixman] [PATCH 0/2] 7-bit bilinear interpolation precision

2012-07-05 Thread Søren Sandmann
Siarhei Siamashka siarhei.siamas...@gmail.com writes: In the case of 2-pass scaling, typically all the pixels from the source image are participating in calculations (unless M = 2 * N, which is 2x+ downscaling). So the number of horizontal interpolation operations is M * N (each source