[Pkg] The Trunk: Graphics-ct.439.mcz

Nicolas Cellier uploaded a new version of Graphics to project The Trunk: http://source.squeak.org/trunk/Graphics-ct.439.mcz

==================== Summary ====================

Name: Graphics-ct.439 Author: ct Time: 17 September 2020, 1:05:42.958813 pm UUID: 523992a5-7677-d14c-a4b1-e2a676e92c6b Ancestors: Graphics-tonyg.438

Fixes transparency handling in Color >> #negated. Negating a color should not remove its alpha channel.

=============== Diff against Graphics-tonyg.438 ===============

Item was changed: ----- Method: Color>>negated (in category 'transformations') ----- negated "Return an RGB inverted color" ^Color r: 1.0 - self red g: 1.0 - self green + b: 1.0 - self blue + alpha: self alpha! - b: 1.0 - self blue!