UNPACK_PREMULTIPLY_ALPHA_WEBGL constant
UNPACK_PREMULTIPLY_ALPHA_WEBGL = RenderingContext.UNPACK_PREMULTIPLY_ALPHA_WEBGL© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-web_gl/UNPACK_PREMULTIPLY_ALPHA_WEBGL-constant.html