>>How does one get Macsbug to trap when CopyDeepMask is called, then
>>disassemble that instruction?
>>
>>I need to see if it is calling OffsetRect at some point depending on OS
>>8.1, versus 8.6
>>
>>I am getting some strange behavior with CopyDeepMask in 8.1 vs 8.6, and the
>>only thing I can think is that in OS 8.1, CopyDeepmask is offsetting the
>>Mask rect to full left if it isn't. This results in some bad behavior when
>>I drag to the left of my image and adjust the source and mask rects.
>>
>>I don't know for sure other than it looks like my mask rect is getting
>>offset something serious behind my back.
>>
>>?
>>
>>rc
>
>
>I do believe the problem I have been experiencing is that CopyDeepMask has
>a bug whereby if the mask GWorld is a different depth from the Source, and
>only if the mask rect is offset from full left....(not at  0), then it will
>skew the copy all over the place.
>
>The solution unfortunately is to make the mask GW 32 bit also, instead of
>the 8 bit I was using.
>
>I think this will probably solve my OS 9 issues too I bet.
>
>What a bummer. Anyhow... nice to know the problem.
>
>Funky that it works -fine- in OS 8.6 at any depths, but not in 8.1, or 9
>unless source and mask GWorlds are the same. Then again, SeedFill is
>screwed up in OS 8.6.
>
>
>Beware. :)
>
>
>rc


I forgot to add that this affects CopyMask also.

rc