Add code path to upload a sw-rasterized path as a mask for GPU

[bsalomon, 2012-01-12 19:00:46]

Won't be taken today unless the GYP/GrUserConfig disables the OSAA. I have not
found a case where this is slower, though.

[reed1, 2012-01-12 19:33:40]

lgtm

http://codereview.appspot.com/5542043/diff/2001/src/gpu/GrContext.cpp
File src/gpu/GrContext.cpp (right):

http://codereview.appspot.com/5542043/diff/2001/src/gpu/GrContext.cpp#newcode...
src/gpu/GrContext.cpp:1601: GrRect rect;
aside: I wonder if we need this logic elsewhere as well. Could write a helper
function:

// returns the number of rects in border[] that contain the surrounding
// rects after removing "hole" from "outside"
int RectDonut(const Rect& outside, const Rect& hole, Rect border[]);

[bsalomon, 2012-01-15 22:35:00]

closed with r3031