[webkit-reviews] review requested: [Bug 45332] gl-teximage fails on chrome mac bot : [Attachment 68790] patch

[bugzilla-daemon at webkit.org]

Zhenyao Mo <zmo at google.com> has asked  for review:
Bug 45332: gl-teximage fails on chrome mac bot
https://bugs.webkit.org/show_bug.cgi?id=45332

Attachment 68790: patch
https://bugs.webkit.org/attachment.cgi?id=68790&action=review

------- Additional Comments from Zhenyao Mo <zmo at google.com>
It's confirmed that in Mac OS 10.5 (possibly up to Mac OS 10.6.3), CG's decoder
outputs alpha-first pixel format, and from 10.6.4, it's alpha last pixel
formats.

This patch adds path to deal with alpha first formats.	Tested on 10.5 machine.