PredefinedColorSpace srgb-linear and display-p3-linear

Category: Miscellaneous
Type: Chromium catches up
Status: Proposed (Chrome Proposed)
Intent stage: None

Breaking change: No
Enterprise impact: None
Spec maturity: Published standard
Web Platform Tests: Yes

WPT details: API tests (setting and getting): https://wpt.fyi/results/html/canvas/element/manual/context-attributes/getContextAttributes.html Draw-and-readback tests: https://wpt.fyi/results/?label=experimental&label=master&aligned&q=2d.color.space Chromium CLs: https://chromium-review.git.corp.google.com/c/chromium/src/+/8313909 Roundtrip tests (toDataURL, toBlob, etc): https://chromium-review.git.corp.google.com/c/chromium/src/+/8312949 https://chromium-review.git.corp.google.com/c/chromium/src/+/8314209

Summary

Add srgb-linear and display-p3-linear color spaces (as defined by CSS) to PredefinedColorSpace for use with canvases.

Motivation

Linear color spaces (where pixel values correspond linearly to luminance) are extremely commonly used in applications with connections to physical light rendering (e.g, games) or spatial processing (e.g, decimation, anti-aliasing, and interpolation).

Standards & signals

Specification: https://html.spec.whatwg.org/multipage/canvas.html#colour-spaces-and-colour-correction
Firefox: No signal
Safari: Positive — Suggested by WebKit, already implemented in WebKit.
Web developers: Positive — Partners have repeatedly requested linear working color spaces
Tracking bug: https://issuetracker.google.com/issues/454152417

Ecosystem

Web Platform Tests: https://wpt.fyi/results/?q=2d.color.space
Chrome Platform Showcase: https://chrome-platform-showcase.paulkinlan-ea.deno.net/features
GenDN reference: https://gendn.paulkinlan-ea.deno.net/features
chrome.dev demos search: https://www.google.com/search?q=site%3Achrome.dev+PredefinedColorSpace%20srgb-linear%20and%20display-p3-linear
MDN Web Docs: https://developer.mozilla.org/en-US/search?q=PredefinedColorSpace%20srgb-linear%20and%20display-p3-linear
Baseline status: https://webstatus.dev/?q=PredefinedColorSpace%20srgb-linear%20and%20display-p3-linear

View on chromestatus.com