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Re: NSBezierPath append CGGlyph
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Re: NSBezierPath append CGGlyph


  • Subject: Re: NSBezierPath append CGGlyph
  • From: Shawn Erickson <email@hidden>
  • Date: Sat, 01 Sep 2007 09:09:51 -0700


On Sep 1, 2007, at 8:49 AM, Keith Duncan wrote:

NSGlyph is not an object, it's an int. Try casting them to a NSGlyph (no asterisk)

Actually NSGlyph is an unsigned integer, whereas CGGlyph is an unsigned short. However I have a buffer (C style array) of CGGlyphs.


The method I was using was -[NSBezierPath's appendBezierPathWithGlyphs:count:inFont:] which expects a buffer of NSGlyphs. So you see my cast was correct it just seems that there is an index mismatch between CGGlyph and NSGlyph such that they aren't interchangeable.

Actually your cast doesn't help and is in fact wrong since it prevents the compiler from seeing your error.


If you have an C array of CGGlyphs then each array slot is 2 bytes wide and casting wont change how the memory is allocated or populated. The appendBezierPathWithGlyphs:count:inFont: method expects a C array of NSGlyphs (4 byte slots).

So if you stated you have 10 glyphs then it is expecting an array 40 bytes long but you are only giving it one that is 20 bytes long. Additionally each time it reads a glyph it was actually reading two CGGlyphs which is obviously not what you want.

Anyway consider using appendBezierPathWithPackedGlyphs: with a NULL terminated CGGlyphs array (not ideal...).

-Shawn
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References: 
 >NSBezierPath append CGGlyph (From: Keith Duncan <email@hidden>)
 >Re: NSBezierPath append CGGlyph (From: Scott Thompson <email@hidden>)
 >Re: NSBezierPath append CGGlyph (From: Keith Duncan <email@hidden>)

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