Add support for additional blend modes to SVGFEBlendElement
New modes to be supported are:
overlay,
color-dodge,
color-burn,
hard-light,
soft-light,
difference,
exclusion,
hue,
saturation,
color and
luminosity
Since the new modes don't have any corresponding IDL constants exposed
on the SVGFEBlendElement interface, a mechanism is added to be able to
differentiate between "internal" and "exposed" enumeration values, and
reject those that are "internal-only" from being read or written
through SVGAnimatedEnumeration.
Test feBlend-all-modes.html evolved from test in WebKit commit
http://trac.webkit.org/changeset/170433 by Dirk Schulze.
BUG=389594
Review URL: https://codereview.chromium.org/447193002
git-svn-id: svn://svn.chromium.org/blink/trunk@179732 bbb929c8-8fbe-4397-9dbb-9b2b20218538
8 files changed
