From kde-kimageshop  Tue Sep 29 13:57:56 2009
From: Boudewijn Rempt <boud () valdyas ! org>
Date: Tue, 29 Sep 2009 13:57:56 +0000
To: kde-kimageshop
Subject: Re: KisPainter::paintPolygon used in paintops
Message-Id: <200909291557.56800.boud () valdyas ! org>
X-MARC-Message: https://marc.info/?l=kde-kimageshop&m=125423272203815

On Tuesday 29 September 2009, Sven Langkamp wrote:
>
> I'm not sure if QImage::pixel suffers from the same slowness as setPixel,
> but it might be worth to try using QImage scanline instead. Same with
> QPainter::fillRect vs QImage::fill.

When doing filters for Hyves, I found that using scanline made a huge 
difference.
 
> Adapt the size of the QImage to the path. It isn't needed to create a
> 256x256 QImage if you are just painting a 10 pixel circle.
> 
> Combine several paths into one QPainterPath. No idea, if that works with
>  the spray tool but it would probably help a lot if you could group the
>  circles etc. in in qpainterpath before using fillPainterPath.
> 


-- 
Boudewijn Rempt | http://www.valdyas.org
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