[Qgis-developer] Multi-threading rendering merged to master

Mathieu Pellerin nirvn.asia at gmail.com
Wed Feb 26 05:41:54 PST 2014

Happy to report that following Martin's last commit (
I cannot see any issues with vector/raster layer rendering, as well as
labelling. All renders like 2.2, except the user experience is 10 times
better :)

Larry, I'm pretty sure your labeling tests will mostly turn green now.


On Wed, Feb 26, 2014 at 3:59 PM, Martin Dobias <wonder.sk at gmail.com> wrote:

> Hi Larry
> On Tue, Feb 25, 2014 at 5:55 AM, Larry Shaffer <larrys at dakotacarto.com>
> wrote:
> > Hi Martin,
> >
> > This is just awesome work!
> >
> > Unfortunately, all but the simplest labeling tests (default labels of mm
> > unit) fail, especially any that utilize labels in map units. In your
> > forthcoming detailed description of changes you mentioned, could you add
> > some info on what may have changed with regards to output resolution?
> I am sorry about that, but I am sure we can sort it out in the next
> few days. Mathieu has done a great job testing post-MTR rendering and
> reporting regressions, just today he has added #9661 and #9662 - maybe
> these are the issues causing the tests fail.
> The main change is that doing size/width calculations should get
> simpler now, because the "scale factor" and "raster scale factor" are
> now always equal to one (so we do not need to use them anymore) and
> there is just one true DPI (instead of two DPIs - painter DPI and
> scene DPI). I know that labeling had to do some voodoo to get the
> rendering right, I remember updating that code, but maybe I missed
> some pieces....
> Regards
> Martin
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