Low latency canvas contexts with desynchronized

Category: Graphics
Type: New or changed feature
Status: Enabled by default (Chrome 75)
Intent stage: None

Summary

The getContext() method now supports a desynchronized option, which provides a low-latency alternative to the now deprecated NaCl/PPAPI solution which used native OpenGL rendering. The new solution uses either 2d or webgl rendering. For example: `let context_type = '2d’; // Or 'webgl' canvas.getContext(context_type, {desynchronized: true});`

Standards & signals

Specification: https://html.spec.whatwg.org/multipage/canvas.html#dom-canvasrenderingcontext2dsettings-desynchronized
Firefox: Positive — https://bugzilla.mozilla.org/show_bug.cgi?id=1536809 . (See the comment from @jdashg right after the link, somehow the approval of the PR is not link-able)
Safari: Positive — https://bugzilla.mozilla.org/show_bug.cgi?id=1536809
Web developers: Strongly positive
Tracking bug: https://crbug.com/788439

Docs: https://github.com/whatwg/html/issues/4087 https://tinyurl.com/lowlatency-canvas-on-chromeos

Samples: https://codepen.io/miguelao/full/WKZaqd https://codepen.io/miguelao/full/ZjJNNw https://codepen.io/miguelao/full/mLLKLg

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