[8u20] Review request: RT-13275 - 0 radius blurs produce low resolution output

[Jim Graham]

Kevin, Chien, Felipe,

I'm tagging 3 people on this review to hopefully get some more critical 
feedback mostly because the webrev is large, though most of the changes 
are simple due to some method signature changes...

Jira: https://javafx-jira.kenai.com/browse/RT-13275
webrev: http://cr.openjdk.java.net/~flar/RT-13275/webrev.00/

More information about the content of the changes appears in the latest 
comment in the Jira.

Compiled on Mac and Win7.
Test cases run on Mac with es2,sw.
Test cases run on Win7 with d3d,es2,sw.
Ensemble8 and some other samples tested on Mac.

			...jim