Finding text's bounding rect in Core Text

I'm trying to find the boundaries of a line of text in Core Text. For simplicity, assume it has a single character. At the moment I'm using the following method: ``` line = CTLineCreateWithAttributedString(attrString); rect = CTLineGetImageBounds(line, context); ``` It works most of the times, but for some characters, like math italic d (Unicode: 0x1D451) or math italic q (Unicode: 0x1D45E), the width is a bit short. I tried using `CTLineGetTypographicBounds()` or `CTFramesetterSuggestFrameSizeWithConstraints`, but they didn't help either (I think they use glyph's advance to find the width, not its graphical width.) As the font itself isn't italic, I also can't use slant angle to correct this. I tried accessing the glyphs directly and using `CTFontCreatePathForGlyph()`, but failed as CGGlyph and UniChar are both 16-bits and I need 32-bit characters. Does anyone know if I'm doing anything wrong? If so, what's the right way? Update: To make sure it's not a problem related to the font, I used different fonts. The problem exists even for ASCII characters in Arial Italic. Update: Ignore my previous update! It turns out this one (problem with Arial Italic) was my own bug. The first problem still stands though.