> On Aug 24, 2016, at 8:02 PM, Britt Durbrow 
> <bdurb...@rattlesnakehillsoftworks.com> wrote:
> 
> 
>> On Aug 24, 2016, at 12:59 PM, Jeff Szuhay <j...@szuhay.org> wrote:
>> 
>> I draw my images (clocks) into a “reference” sized rectangle—for simplified 
>> position calculations—and then have CoreGraphics scale into the destination 
>> view rect.
> 
> Don’t do that with bitmap scaling. It’s wasteful, and will look bad.
> 
> Instead, create the bitmap at the correct size for it’s destination; and use 
> the drawing matrix transform functions (scale, translate, rotate, etc) to set 
> up your drawing environment.


Okay, so when the user changes the clock size (it’s destination), then recreate 
the bitmap to the new size and redraw everything at the new scale?


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