leonwind 1076f3f7d7 Refactor RgbaMatrix to RgbMatrix.
* Rename all Rgba instances to Rgb.
* Remove alpha value from the RGBA Matrices and apply the 4x4 matrix
only to the R, G, B channels.
* Restore the alpha from the input unchanged.

PiperOrigin-RevId: 467208888
(cherry picked from commit 8760ee48b910a4a34e6cc5008b660513203b05e8)
2022-08-12 14:51:25 +00:00
..