tree fc18ba44cbd7bfc55ac169fe2610c45c4194fe03
parent 8f4ba76742c329bc4d5e1b8ca376d27922bd00b1
author scroggo <scroggo@chromium.org> 1439566366 -0700
committer Commit bot <commit-bot@chromium.org> 1439566366 -0700

Support more swizzles to 565 in SkCodec

Add more swizzling functions for swizzling to 565. Much of this
code was revived from crrev.com/1055743003 (for BMP). Also added
swizzling functions for WBMP.

Consolidate the static function conversion_possible.

In SkCodec::getPixels, check that the alphatype corresponds to the
colorType. This prevents requesting 565 + non-opaque.

In SkIcoCodec, report that the image is unpremul (instead of
whatever the largest embedded codec thinks), but modify the
requested info to have the alpha type expected/required by the
embedded codec.

Add tests for decoding to 565.

BUG=skia:3257
BUG=skia:3683

Review URL: https://codereview.chromium.org/1277213002