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Re: cairo vs. art and PDFKit


From: Eric Wasylishen
Subject: Re: cairo vs. art and PDFKit
Date: Fri, 24 Feb 2012 13:01:42 -0700

Hi Riccardo,

I looked in to this a bit more, and what I said before isn't really correct. 
-[NSImageRep draw] is a primitive method so subclasses must override it, so the 
error is really in PDFKit.
 
Probably the simplest fix is to keep the PDFKit's -drawInRect: as-is, and add a 
draw method

- (void) draw
{
        NSSize size = [self size];
        [self drawInRect: NSMakeRect(0, 0, size.width, size.height)];
}

I added a comment to NSImageRep.h to make this more explicit.

-Eric

On 2012-02-24, at 9:17 AM, Riccardo Mottola wrote:

> Hi Eric,
> 
> On 02/23/12 21:13, Eric Wasylishen wrote:
>> Hi Riccardo,
>> Thanks for the bug report, this is an interesting one.
>> 
>> It looks like I made some oversights with how NSImageRep expects to be 
>> overridden - currently it looks like image rep subclasses must override 
>> -draw in order to work properly. By chance when cairo is not in use, we 
>> don't hit this bug.
>> 
>> As a quick workaround you can change the -drawRect: method in PDFImageRep.m 
>> to a -draw method:
>> 
> indeed, with that fix it works. Do you think you can fix this in -back and we 
> can make soon a minor release? I'd like not to make that patch definitive.
> Or I make the patch available so that Sebastian and Richard can package a 
> working GSPdf
> 
> Thank you,
>   Riccardo
> 
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