Mark drawbitmaprect's large bitmaps as immutable.

Mark drawbitmaprect's large bitmaps as immutable.

This reduces the peak memory usage of out/Debug/dm --skr --match drawbitmaprect from ~1.6G to ~200M.

I'm not sure how the numbers got so huge to begin with from a 2K x 2K 8888 bitmap (16MB).

BUG=skia:2378
Committed: http://code.google.com/p/skia/source/detail?r=14529

[reed1, 2014-05-02 14:10:59]

lgtm

https://codereview.chromium.org/265813007/diff/1/gm/drawbitmaprect.cpp
File gm/drawbitmaprect.cpp (right):

https://codereview.chromium.org/265813007/diff/1/gm/drawbitmaprect.cpp#newcode71
gm/drawbitmaprect.cpp:71: bm->setImmutable();
// mark as immutable to be nicer to backends, so they won't have to deep-copy
it.

[mtklein, 2014-05-02 14:14:00]

lgtm

https://codereview.chromium.org/265813007/diff/1/gm/drawbitmaprect.cpp
File gm/drawbitmaprect.cpp (right):

https://codereview.chromium.org/265813007/diff/1/gm/drawbitmaprect.cpp#newcode71
gm/drawbitmaprect.cpp:71: bm->setImmutable();
On 2014/05/02 14:11:00, reed1 wrote:
> // mark as immutable to be nicer to backends, so they won't have to deep-copy
> it.

Done.

[commit-bot: I haz the power, 2014-05-02 14:14:23]

CQ is trying da patch. Follow status at
https://skia-tree-status.appspot.com/cq/mtklein@chromium.org/265813007/20001

[commit-bot: I haz the power, 2014-05-02 14:22:41]

Change committed as 14529