Intent to Prototype: Canvas text writing mode support

[Chromestatus]

Contact emails

sche...@chromium.org, fma...@chromium.org

Explainer

https://github.com/schenney-chromium/explainers/blob/canvas-writing-mode/canvas-writing-mode/README.md

Specification

No information provided

Summary

Writing mode support for HTML canvas text will enable correct text shaping for vertical text, as already supported by CSS. Canvas text styles gain a "writingMode" attribute along with a "textOrientation" attribute that have the same effect on a text run as the related CSS properties. The various alignment attributes are augmented to support vertically oriented text. The CSS properties from the canvas element style are ignored.

Blink component

Blink>Canvas

Web Feature ID

canvas-2d

Motivation

Canvas text styles do not provide any direct control over the writing mode and character orientation, and browsers are inconsistent with how they treat the CSS properties on the canvas element. The workaround is to render and position each character separately, which may require a JS implementation of text shaping.

Initial public proposal

https://github.com/whatwg/html/issues/11449

Requires code in //chrome?

False

Tracking bug

https://issues.chromium.org/issues/467169720

Estimated milestones

No milestones specified

Link to entry on the Chrome Platform Status

https://chromestatus.com/feature/5101480770142208?gate=6314380205621248

This intent message was generated by Chrome Platform Status.