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On Friday 10 October 2003 00:02, Patrick Julien wrote:

> > With code that does to a QImage what the image-magick based builder doe=
s;
> > create the necessary KisPaintDevice and blit that to the image; that
> > would
>
> That would be even slower.  If you want speed, you need to use the tiles
> directly.  You can actually support undo/redo with what you have here
> too... you just need to set the COW flags of the tiles before using them.
>

I've been looking at descriptions of how the Gimp works when painting, and =
it=20
appears that they create a new image for every 'dab' -- every brush action =
=2D-=20
do the brush stuff and then composite the image onto the current layer:
http://www.levien.com/gimp/brush-arch.html. So what I'm doing here seems to=
 be=20
actually pretty close.

I want to tackle undo/redo today -- first I'll try looking at how bitblt ca=
lls=20
tilebitblt, but if that fails I'll go for the code from buildimage anyway.=
=20
Or, if I get bored, I'll add line shapes, sizes and colors. Or perhaps=20
implement the rest of the QPainter primitives. Or add icons for the tools.=
=20
Or... :-)

=2D-=20
Boudewijn Rempt | http://www.valdyas.org/index2.html

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