Omit shader swizzle if it is rgba.

Omit shader swizzle if it is rgba.

R=robertphilips@google.com
Committed: https://code.google.com/p/skia/source/detail?r=5804

[bsalomon, 2012-10-04 13:17:41]

Stephen rightly complains that our shaders have .rgba all over them. To work
around a current limitation in the custom stage framework he uses an rgba
texture access and selects just the alpha component. So today that produces
texture2D(...).rgba.a which is kinda odd.

[TomH, 2012-10-04 13:19:31]

LGTM

[robertphillips, 2012-10-04 14:07:03]

LGTM

[TomH, 2012-10-04 14:08:17]

OK, phew - I saw that R= go through on the commit, and was thinking that the
haircut wasn't extreme enough for me to be mistaken for Rob.

[bsalomon, 2012-10-04 14:12:24]

On 2012/10/04 14:08:17, TomH wrote:
> OK, phew - I saw that R= go through on the commit, and was thinking that the
> haircut wasn't extreme enough for me to be mistaken for Rob.

Oh hmm... I didn't think about that . I've been sticking R= lines in my gcl CL
description so I don't have to type reviewers names on codereview. Maybe that's
a mistake unless I remember to edit them later. In any event I've now spent more
energy typing this comment than I've saved using R= so I better quit.