Enhance SkDropShadowImageFilter to support separate X & Y sigmas, and crop rect. This required a new flavour of the constructor.

This is driven by the feDropShadow filter effect in SVG, which unlike the shorthand version accepts separate X & Y sigmas.

Covered by new GM dropshadowimagefilter.

R=reed@google.com

Review URL: https://codereview.chromium.org/88243004

git-svn-id: http://skia.googlecode.com/svn/trunk/include@12401 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed