[webkit-dev] ［GTK］Scroll deficiency

[xiong]

Brent,

I just start to resolve the problem.

The "debug build" and "background color" hack you mentioned, i also
need time to try.

Please wait a reply.

I hope the member in the mail-list to join in the work, when see the subject
if you have the same symptom.

Thanks.

-Xiong

On Fri, Mar 27, 2009 at 1:54 PM, Brent Fulgham <bfulgham at gmail.com> wrote:

> Xiong,
> I'm sorry you are encountering the problem, but I must admit I am glad
> someone else is seeing this issue as now we can pool our efforts to resolve
> it.
>
> Since you are using directfb stuff, and I am on top of Windows, it seems
> the culprit is somewhere in the Cairo logic.  Perhaps the dirty regions are
> not being computed properly (I have encountered a few places where the
> coordinate systems in Cairo and Windows don't agree).
>
> However, the kludge of setting a background color (does this work for you
> as well?) does not fit into the 'bad coordinate' theory, as I don't see how
> the presence of a background color in the rendering instructions would
> affect this.
>
> The fact that it does not happen for me in Debug builds makes me wonder if
> maybe there is some kind of improper initialization or buffer overrun that
> is involved.
>
> -Brent
>
>
> On Mar 26, 2009, at 10:48 PM, xiong wrote:
>
> Webkit r40777 Release builds for me.
>
> On Fri, Mar 27, 2009 at 1:25 PM, Brent Fulgham <bfulgham at gmail.com> wrote:
>
>> I wonder if your issue is related to one I documented on Windows (using
>> Cairo backend) a few months ago.  Currently this only happens for me in
>> Release builds, but it's still quite annoying.
>>
>> https://bugs.webkit.org/show_bug.cgi?id=22891
>>
>> I attached a few images in my bug for comparison.
>>
>> The easiest way to reproduce is to go to the http://planet.webkit.org and
>> try to scroll up/down the page using the scroll bar.  After a short while
>> you will find areas of the page not rendered.
>>
>> Thanks,
>>
>> -Brent
>>
>>
>> On Mar 26, 2009, at 9:54 PM, browserwk wrote:
>>
>>  Dear all:
>>>
>>> I am able to run webkit over directfb backend on arm platform - using
>>> GtkLauncher .
>>>
>>> The problem I face is that when I open
>>> http://www.google.com/intl/en/privacy.html using this browser and scroll
>>> the page; it results the visual area is not updated when scrolling, and
>>> the screen display confusion.
>>>
>>> Any ideas where to look to fix this issue ?
>>>
>>> Appreciate any clues~
>>>
>>> FYI:
>>> [Following address are the screenshots]
>>>
>>> Render OK when not scroll:
>>>
>>> http://picasaweb.google.com/lh/photo/ybhIcahTEgsfBmMzXM13-g?feat=directlink
>>>
>>> Render error when scroll:
>>>
>>> http://picasaweb.google.com/lh/photo/0B8fi1ZTZ7hWH0S86a5RJA?feat=directlink
>>>
>>> http://picasaweb.google.com/lh/photo/_ScHyJBOmJ8-xbRB_aZ2NQ?feat=directlink
>>>
>>> http://picasaweb.google.com/lh/photo/Ael-gWdHEVnEtu_qbMFOZw?feat=directlink
>>>
>>> BTW:
>>> I am using following version of packages and running DirectFB without
>>> any acceleration on my embeded target.
>>> WebKit-r40777
>>> gtk+-2.12.12
>>> cairo-1.4.14
>>> DirectFB-1.2.6
>>>
>>> Thanks.
>>>
>>> -xiong
>>> _______________________________________________
>>> webkit-dev mailing list
>>> webkit-dev at lists.webkit.org
>>> http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
>>>
>>
>>
>
>
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