tree 4eecdf5aa0aa3c0285b319c63b148fd672c2508b
parent e516e4fa2b681dc97775c1581eef38d7559f33d1
author emmaleer <emmaleer@google.com> 1439490417 -0700
committer Commit bot <commit-bot@chromium.org> 1439490417 -0700

SkScaledCodec class

This class does scaling by using a scanlineDecoder.
getScanlines and skipScanlines are used for y sampling,
the swizzler is used for x sampling

this class is currently only working for png and jpeg images
I will update other Codec types to work soon

For SkJpegCodec to implement width wise swizzling it now
uses a swizzler. I ran performance tests on this change.
Here are the performance test results:
https://docs.google.com/a/google.com/spreadsheets/d/1D7-Q_GXD_dI68LZO005NNvb8Wq2Ee0wEBEPG72671yw/edit?usp=sharing

BUG=skia:

Review URL: https://codereview.chromium.org/1260673002