Here's a post from Scott Raney on bugzilla (bug 1859) where he talks about
the image size limits on the Mac:
This is a fundamental limitation in the MacOS image architecture: the rowBytes
field of the PixMap image structure has a maximum value of 4000 (hex) which on
a 32-bit display works out to 4096 pixels. (see
http://developer.apple.com/documentation/Carbon/Reference/QuickDraw_Ref/qdref_m
ain/data_type_41.html). This can be worked around but only by writing a lot
of code to handle all the manipulation using local instead of OS routines, so
for now I'm downgrading to an enhancement and reassigning to Tuv (since I no
longer do Mac development).
So 4096 X 4096 seems to be the current image size limit. But I'm sure I read
somewhere that this was going to be "fixed" in an upcoming version of Rev,
where this limitation (I believe it's a limitation of QuickDraw) will be
removed.
Thanks for that Howard. From my testing, the limit is still there in
the current version of Rev. I have been checking for images with any
dimension greater than 4000 so that's probably a safe margin. However
it sounds like this is Mac only, so I can ignore the size of images in
Windows.
Cheers,
Sarah
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