From: Basile Clement
On some screens (typically low quality laptop screens), using Bayer
ordered dithering has been observed to cause color changes depending on
*where the gradient is rendered on the screen*, causing visible
flickering when moving an image on the screen.
To alleviate the issue,
There is less calculation, but the noise matrix takes up cache space
(about half a modern CPU's L1) and hence increases memory pressure. The
actual performance relationship is probably hardware dependent, but on
my laptop doing a quick check with patched lowlevel-blt-bench:
- Bayer is ~8% faster
Is the "blue noise" version actually slower than the Bayer? Seems to be
doing a bit less calculation but it reading the array of weights. The
removal of the need for the pattern offset seems like a win.
On Mon, Apr 22, 2019 at 9:27 AM Matt Turner wrote:
> On Fri, Apr 19, 2019 at 4:52 PM Bryce Ha
On Fri, Apr 19, 2019 at 4:52 PM Bryce Harrington
wrote:
> Inkscape would love to see Basile's dithering patches included. Our
> testing shows that they make a huge quality difference for our users;
> this solves a critical need.
>
> Mc and I have done some preliminary investigation into how to pl
