Best way to add an image to an oval graphic?

[Richard Gaskin]

Using the backgroundPattern seems intuitive, but read the fine print: 
image dimensions have very specific requirements, and not heeding those 
can yield unpredictable results.

Earlier this year I had a project that used backgroundPattern as a way 
to use the graphic shape to mask an image.  It worked well in most 
circumstances, with a satisfying range of images sizes - until it didn't.

We eventually found some images that would render at a fraction of 
actual size, tiling across.

I had to ditch it and find another approach, which led to the thread 
here a few months ago about keyhole effect.

The result of that is you can use a graphic placed on top of an image as 
a mark, with the graphic's backgroundColor set to black and the ink set 
to blendDstIn.

That combo will give you a lot of flexibility for centering and even 
resizing your masking graphic over the image.

-- 
  Richard Gaskin
  Fourth World Systems
  Software Design and Development for the Desktop, Mobile, and the Web
  ____________________________________________________________________
  Ambassador at FourthWorld.com                http://www.FourthWorld.com