[Pixman] [PATCH 07/15] pixman-filter: Speed up the BOX+BOX filter

Oded Gabbay oded.gabbay at gmail.com
Mon Jan 11 01:16:55 PST 2016

On Fri, Jan 8, 2016 at 8:53 PM, Bill Spitzak <spitzak at gmail.com> wrote:
> On Thu, Jan 7, 2016 at 11:44 PM, Pekka Paalanen <ppaalanen at gmail.com> wrote:
>> Please keep in mind that the filters GOOD and BEST have been as is for
>> a long long time, AFAIU, so changing their behaviour now is likely not
>> a good idea. They are no longer "a good filter" and "whatever best
>> filter", but "the specific filter called GOOD" and "the specific filter
>> called BEST", in lack of documentation saying otherwise.
> Both GOOD and BEST are identical to BILINEAR in the current version of
> Pixman. Therefore anybody relying on the current behaviour can achieve it by
> using BILINEAR. In addition GOOD is unchanged for any scales larger than .75
> or for a scale of exactly .5.
> Also despite their names, bilinear in no way would be considered "good" or
> "best" by any sane person. We should not add illogical names (like NEW_GOOD
> or whatever) just because of paranoia over back-compatibility. It is also
> highly desirable that the default actually be "good", this cannot be done
> unless GOOD is changed, or the default is changed to "NEW_GOOD".
> This change was made to Cairo over a year ago with no complaints (except for
> speed issues, which this patch is necessary to solve by moving the fix from
> Cairo to Pixman). Lets get out of the dark ages, and stop doing things that
> are making open source desktops a laughingstock.

Hi Bill,
I just now read the new emails (I was on PTO for the last week).
It seems you found some mistakes and you want to resend a new version.
Did I understand you correctly ?
If that is indeed the case, then I prefer to wait for that version
(v9), and skip reviewing v8.
Please ack this.


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