commit 772042aa3d99e2cfd8077981236cc2bec4d8078f
author Vikas Arora <vikasa@google.com> Fri Aug 10 15:00:23 2012 -0700
committer Vikas Arora <vikasa@google.com> Mon Aug 13 11:29:59 2012 -0700
tree 053f42b9d6666c76e8b28d9643e60b27e2270b0b
parent 392a7bb3c906c53e16b63adad76910e5b6068649

Add support for WebP Alpha (and Lossless) images.

Android/Skia supports pre-multiplied Alpha. WebP image format supports
Alpha via color modes MODE_RGBA & MODE_RGBA_4444 (corresponding ones for
premultiplied alpha are MODE_rgbA & MODE_rgbA_4444).
The pre-requisite change for this one is the webp patch
(https://googleplex-android-review.googlesource.com/215797), that
extends the webp library (ver 0.2.0-rc1) to support these new color
modes for Alpha (along with supporting Lossless image encoding/decoding).

Change-Id: I153b6348382c04b16e8c59bbb4c8f3c62f897376