On Mar 20, 2008, at 10:52 AM, Chris Meyer wrote:

I read the tech note for 10.5 describing changes to CILinearGradient and how "for applications compiled on Mac OS X v10.4, these filters continue to
behave on Mac OS X v10.5 as they did previously."
Trying to interpret this imprecise statement, I read it as "for applications
compiled against the 10.4 SDK."

That reading would be incorrect. It means exactly what it says. If you compile on 10.4 (running Tiger at the time, not the SDK you are targeting), then you get the old behavior even when running under Leopard.

So my question is: How can I reliably determine whether I need to reverse
the arguments to CILinearGradient?

Building against 10.4 doesn't seem to work. And since I'm built against 10.4, I can't check the AppKit version (it will just report the 10.4 version). So
what should I do?

Actually, checking NSAppKitVersionNumber is a good way to determine which version of the AppKit you're running (<http://developer.apple.com/documentation/DeveloperTools/Conceptual/cross_development/chapter_5_section_1.html >).

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