On Jan 24, 2008, at 1:55 PM, Christiaan Hofman wrote:

>
> On 24 Jan 2008, at 10:44 PM, Adam R. Maxwell wrote:
>>
> I would expect that PDFPage does essentially the same thing. Perhaps
> it's some option in the graphics context?

Could be, or the page was screwed up by PDFDocument somehow.  A  
problem with the graphics context is more likely, but drawing to an  
NSBitmapImageRep has the same problem.

> I really wonder how Preview draws its thumbnails, because it does not
> seem to have as serious problems with some files.

It's now using PDFThumbnailView, I think, but I've no idea what that  
does internally.  It's fast, but the thumbnail have a pretty small  
maximum size.  They might be using CGLayers or something.

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