Sounds like a bug.
File a bug report.
Thanks,
Aki
On Jan 29, 2012, at 10:03 AM, Gus Mueller <g...@flyingmeat.com> wrote:
> I have an issue where using NSLayoutManager's
> setDefaultAttachmentScaling:NSImageScaleProportionallyDown doesn't seem to
> work if I setup my own NSGraphicsContext + CGPDFContext.
>
> The problem is that large inline images are not scaled down when drawn like
> they would be in an NSTextView. Text after the image is positioned as if it
> was scaled though, so I end up with text that is drawn over an image.
>
> Here's the abbreviated code for what I'm doing:
>
> .. make a CGPDFContext "ctx", wrap it up in a flipped NSGraphicsContext
> .. load an NSTextStorage "contents" up with my RTFD file
>
> NSLayoutManager *layoutManager = [[[NSLayoutManager alloc] init] autorelease];
> [contents addLayoutManager:layoutManager];
>
> [layoutManager setDefaultAttachmentScaling:NSImageScaleProportionallyDown];
>
> BOOL clipped = NO;
> do {
> CGContextBeginPage(ctx, &box);
> CGContextTranslateCTM( ctx, 0, box.size.height);
> CGContextScaleCTM(ctx, 1.0, -1.0 );
>
> NSTextContainer *textContainer = [[[NSTextContainer alloc]
> initWithContainerSize:box.size] autorelease];
> [layoutManager addTextContainer:textContainer];
> [layoutManager ensureLayoutForTextContainer:textContainer];
>
> NSRange glyphRange = [layoutManager
> glyphRangeForTextContainer:textContainer];
> NSRange charRange = [layoutManager characterRangeForGlyphRange:glyphRange
> actualGlyphRange:nil];
>
> [layoutManager drawGlyphsForGlyphRange:glyphRange atPoint:NSZeroPoint];
>
> clipped = (NSMaxRange(charRange) < [contents length]);
>
> CGContextEndPage(ctx);
> }
> while (clipped);
>
> .. cleanup
>
> I've got some very simple sample code which reproduces the behavior here:
> http://gusmueller.com/stuff/NSLayoutImageScalingPDFProblem.zip
>
> Can anyone shed some light on what I'm doing wrong?
> This is on 10.7.2 btw.
>
> thanks,
>
> -gus
>
> --
>
> August 'Gus' Mueller
> Flying Meat Inc.
> http://flyingmeat.com/
>
>
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