Hi,
CoreText is designed to be a core line layout engine, a building block for
full-fledged text systems like the Cocoa Text System or WebKit.
So, it's not meant for this kind of full document processing.
It's hitting the 4GB memory barrier. I can reproduce the same issue on SL
running in 32bit.
I suggest considering to use the Text System instead.
Aki
On 2009/11/11, at 7:39, DairyKnight wrote:
> Hi all,
>
> I'm working with a program utilizing Core Text, but occurred to some strange
> problems. When trying to reformat a document
> larger than 1MB, the program crashes with the following error msg:
> malloc: *** mmap(size=4,294,598,656) failed (error code=12)
> *** error: can't allocate region
> *** set a breakpoint in malloc_error_break to debug
>
> Code is attached below. To me, it doesn't seem to have any problems. The app
> crashes at the line creating the CTFrameRef, and
> what's even stranger is, it crashes at around 1/3 of the file, so not
> necessarily to be an out-of-memory problem. - It says CTFrameRef is
> allocating 4GB of memory, which runs beyond the 32-bit boundary.
>
> PS: The app runs without any problems on Snow Leopard, so could possibly be
> a bug with Leopard?
>
> //
> // text is some Attribute String previously created
> //
> CTFramesetterRef framesetter =
> CTFramesetterCreateWithAttributedString((CFAttributedStringRef) text);
> frameRange = CFRangeMake(0, 0);
> for (range = CFRangeMake(0, 0); range.location < text.length;
> range.location += frameRange.length)
> {
>
> CGMutablePathRef path = CGPathCreateMutable();
> CGPathAddRect(path, NULL, frameRect);
>
> CTFrameRef frame = CTFramesetterCreateFrame(framesetter, range,
> path, NULL);
>
> frameRange = CTFrameGetVisibleStringRange(frame);
>
> CFArrayRef lines = CTFrameGetLines(frame);
>
> CFIndex i, total = CFArrayGetCount(lines);
> CGFloat y = frameRect.origin.y;
>
> frameRect.origin.y = y;
> frameRect.size.height = contentSize.height;
>
> CFRelease(path);
> CFRelease(frame);
> }
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