1514311 - Color interpolation does not work if one of the endpoint colors is context-fill or context-stroke

Status: NEW

(Core :: CSS Transitions and Animations, defect, P3)

Description

[Markus Stange [:mstange]]

Attachment: embedded svg

Steps to reproduce:
 1. Enable svg.context-properties.content.enabled in about:config.
 2. Load the testcase which I am about to attach.

Expected results:
The testcase should show four purplish-colored circles, i.e. their color should be half-way between blue and red.

Actual results:
All circles are blue.

Comment 1

[Markus Stange [:mstange]]

Attachment: testcase

Comment 2

[Emilio Cobos Álvarez (:emilio)]

If we do this, we should probably add the capability to Color to have multiple partial weights like we do already for CurrentColor in:

  https://searchfox.org/mozilla-central/rev/49e78df13e7a505827a3a86daae9efdf827133c6/servo/components/style/values/generics/color.rs#36

Or implement a version of that just for the SVG colors in:

  https://searchfox.org/mozilla-central/rev/49e78df13e7a505827a3a86daae9efdf827133c6/servo/components/style/values/generics/svg.rs#64

Either way it's not terribly hard, just work. All the math should be already in ComplexColorRatios and such.

Comment 3

[Hiroyuki Ikezoe (:hiro)]

The hardest part I guess is the case where color is animated.