[webkit-dev] WebKit partial rendering issue

lkcl lkcl at lkcl.net
Mon May 11 09:58:09 PDT 2009

Paul Pedriana-3 wrote:
> The ScrollView::paint function seems wrong to me too.
> The function source is shown below. I don't understand why it uses 
> context->clip(visibleContentRect()) without accounting for 
> documentDirtyRect. Shouldn't it make a union of visibleContentRect and 
> documentDirtyRect? I am writing my own graphics back-end and this lack 
> of clipping is messing up the view drawing.

paul, hi,

there's a lot more corruption going on than just a few artefacts
around buttons - see https://bugs.webkit.org/show_bug.cgi?id=25696
for more details but basically scrolling with mouse or keyboard
_completely_ trashes the screen, with artefacts appearing in
blue or black or from random memory areas.

this is something of a showstopper for an embedded app project
so if you or anyone else have any clues as to what needs to be
done, fixing this, that would be great.

paul if you have some patches already that would be great.

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