[Webkit-unassigned] [Bug 27511] Add WinCE specific platform/graphics files to WebCore

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Mon Aug 10 10:17:34 PDT 2009


--- Comment #81 from Peter Kasting <pkasting at google.com>  2009-08-10 10:17:31 PDT ---
(In reply to comment #79)
> > > > I don't think this basic acknowledge of WebCore should go to ChangeLog. I've
> > > > mentioned NativeImagePtr in there, and I think people who are familiar with
> > > > WebCore image stuff can understand it with no problem.
> > > 
> > > I'm about as familiar with WebKit Images as you can expect from a 

FWIW, I agree with Eric.  I've worked on the Image code as much as anyone
(probably more) lately, and I don't understand why you're doing this.

> class ImageDecoder;
> typedef ImageDecoder* NativeImageSourcePtr;
> typedef RefPtr<SharedBitmap> NativeImagePtr;
> #endif

The RefPtr<> here really scares me.  Every other port uses a raw pointer.  I
fought for weeks (spread over two years) with memory problems in the Skia port
before we managed to understand and precisely duplicate the CG and Cairo models
of memory management for this object.  (For reference, we originally did things
much like you're doing here.)  I am not sure if the cross-platform code will be
both correct and efficient with this kind of usage, and it will definitely be
difficult for others to understand what you're doing.  I strongly recommend you
use a raw pointer and allocate/free it at the same points the other ports do.

In order to avoid deep copying, your native image object can internally
refcount.  That's how the other ports address this issue.

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