1880729 - gfx.color_management.mode=1 causes incorrect canvas ImageData

Status: UNCONFIRMED

(Core :: Graphics: Canvas2D, defect)

Description

[Andrew Sun]

Attachment: Screenshot 2024-02-17 125359.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:124.0) Gecko/20100101 Firefox/124.0

Steps to reproduce:

Prerequisites:

• Wide color gamut display (or a display with a non-sRGB color profile assigned)

• gfx.color_management.native_srgb=false (default on Windows)

• gfx.color_management.mode=1

• On Windows 10/11: HDR (advanced color management) disabled

• On Windows 11: auto color management disabled/unsupported, or "Use legacy ICC color management" checked in EXE compatibility properties if ACM is enabled

• Visit https://jsfiddle.net/0bspzx97/1/

• Hover over a color

Actual results:

Hovered color is rgba(233, 64, 35, 1) (or some other result depending on the primaries of the display/color profile)

This breaks websites like windy.com

Expected results:

Hovered color is rgba(255, 0, 0, 1)

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Graphics: Canvas2D' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:lsalzman, could you have a look please?

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