Implement BlitRect for SkTCompressedAlphaBlitter

Implement BlitMask for SkTCompressedAlphaBlitter

Committed: https://skia.googlesource.com/skia/+/dff491ba3eab17d5ae631e8c46f83a82390213b8

[robertphillips, 2014-08-08 13:34:03]

1gtm but I defer to Mike on this one.

[reed1, 2014-08-08 13:54:52]

https://codereview.chromium.org/451823002/diff/20001/src/utils/SkTextureCompr...
File src/utils/SkTextureCompressor_Blitter.h (right):

https://codereview.chromium.org/451823002/diff/20001/src/utils/SkTextureCompr...
src/utils/SkTextureCompressor_Blitter.h:165: virtual void blitMask(const SkMask&
mask, const SkIRect& clip) SK_OVERRIDE {
I vote to move any impl this big into a .cpp file.

[robertphillips, 2014-08-08 13:57:20]

https://codereview.chromium.org/451823002/diff/20001/src/utils/SkTextureCompr...
File src/utils/SkTextureCompressor_Blitter.h (right):

https://codereview.chromium.org/451823002/diff/20001/src/utils/SkTextureCompr...
src/utils/SkTextureCompressor_Blitter.h:165: virtual void blitMask(const SkMask&
mask, const SkIRect& clip) SK_OVERRIDE {
We would have to switch from a template to a class with more parameters.

[krajcevski, 2014-08-08 15:27:56]

Added an assert to make sure blitMask only gets called once.

[robertphillips, 2014-08-08 15:33:44]

lgtm

[krajcevski, 2014-08-08 15:33:51]

The CQ bit was checked by krajcevski@google.com

[commit-bot: I haz the power, 2014-08-08 15:34:18]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/krajcevski@google.com/451823002/40001

[commit-bot: I haz the power, 2014-08-08 15:41:28]

Change committed as dff491ba3eab17d5ae631e8c46f83a82390213b8