Bugs in NSColor and NSImage in Leopard?

FROM : Stéphane Sudre
DATE : Mon Feb 11 21:48:16 2008

I'm seeing different results for some drawing routines depending on 
the OS version I'm testing them against.

* Problem #1:

I used a pattern for the color of a NSAttributedString through 
[NSColor colorWithPatternImage:];

On 10.4, when the window is resized, the pattern offset is not 
changed inside the text.

On 10.5, when the window is resized, the pattern offset is changed 
inside the text.

Isn't this both a bug and regression?

* Problem #2:

I'm seeing different results for some image compositions:

I have 2 images:

Image A is a stripped pattern (a bit like the one you could find in 
MacPaint)

Image B is the official picture used to draw a checkbox.

On 10.4, if I run the following composition, the results is fine:

  - Create empty picture

  - Composite stripped pattern with NSCompositeSourceOver

  - Composite checkbox with NSCompositeSourceIn

On 10.5, if I run the same composition, the borders of the checkbox 
displays parts of the patterns.

The checkbox picture may have changed but I don't see how it could 
affect this composition.