NSAttributedString rendering bugs when rendered with Cocoa Text (rdar://6379047)
NSAttributedString rendering bugs when rendered with Cocoa Text (rdar://6379047)
- Subject: NSAttributedString rendering bugs when rendered with Cocoa Text (rdar://6379047)
- From: Rua Haszard Morris <email@hidden>
- Date: Tue, 18 Nov 2008 12:50:41 +1300
I have found that NSSuperscriptAttributeName,
NSUnderlineStyleAttributeName, and NSObliquenessAttributeName (those
are the attributes that I have tested) render differently when Cocoa
Text is used to draw the string. The attributes appear to be
intrepreted inverted, in that 1 for superscript produces subscript,
positive obliqueness is a leftward tilt, etc. In normal controls the
attributes render as expected.
Has anyone else seen this problem? I've implemented some workarounds,
tweaking the attribute values depending on whether the string is drawn
via standard controls or within custom views, but I'd like to clear up
whether I'm doing something wrong, or it's expected behaviour, or if
it is a bug in Cocoa Text.
I've reported the bug, with a small project demonstrating the problem:
rdar://6379047
thanks
Rua HM.
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