tree ff998812681dc0bb9b5ed1a796c49a7146f5f6e3
parent 05784d9b1a0b63332fbc3aa8b022ece03d156358
author Mike Reed <reed@google.com> 1497736916 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1497742033 +0000

reduce SkDisplacementImageFilter size

saves ~8K on mac laptop

- remove templates
- check for 0 0r 0xFF in alpha

Before: (using modified bench w/o caching)

  23/23  MB	2	134µs	151µs	146µs	156µs	6%	█▇▆▆▆▆▄▁▁▁	8888	displacement_full_large
  23/23  MB	2	253µs	254µs	255µs	260µs	1%	█▄▄▅▂▁▂▁▁▁	8888	displacement_alpha_large
  24/24  MB	1	410µs	410µs	415µs	445µs	3%	█▃▁▂▁▁▁▁▁▁	8888	displacement_zero_large
  24/24  MB	151	840ns	841ns	853ns	938ns	4%	█▁▁▁▁▁▁▂▁▁	8888	displacement_full_small
  24/24  MB	180	832ns	835ns	836ns	851ns	1%	█▂▁▂▂▁▂▂▂▂	8888	displacement_alpha_small
  24/24  MB	9	60µs	60.9µs	69.9µs	101µs	19%	█▄▄▄▁▁▁▁▁▁	8888	displacement_zero_small

After:

  23/23  MB	3	47.4µs	48µs	48.2µs	51.4µs	2%	█▂▂▃▃▁▁▁▂▁	8888	displacement_full_large
  23/23  MB	2	140µs	141µs	145µs	166µs	7%	▂▁▁▁▁▁▁▁▇█	8888	displacement_alpha_large
  24/24  MB	2	189µs	196µs	197µs	225µs	5%	█▃▂▂▂▂▃▂▁▁	8888	displacement_zero_large
  24/24  MB	134	588ns	594ns	597ns	616ns	1%	▂▁▁█▂▆▂▂▃▄	8888	displacement_full_small
  24/24  MB	168	590ns	592ns	592ns	599ns	0%	▃▂▁▁▁▁▁█▂▂	8888	displacement_alpha_small
  24/24  MB	9	8.39µs	8.41µs	8.42µs	8.53µs	0%	█▄▃▂▁▁▃▂▁▂	8888	displacement_zero_small

Bug: skia:
Change-Id: Ia3b12dc8420b32b65633bb1cf76a15241e420eac
Reviewed-on: https://skia-review.googlesource.com/20181
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Mike Reed <reed@google.com>