We are adding ImageBitmapRendererContext as a valid context for OffscreenCanvas. ImageBitmapRenderingContext allows direct transfer of an ImageBitmap to the canvas surface. This is particularly important as a way to render an ImageBitmap to a Canvas from a Worker (without transferring the ImageBitmap to the main thread). This is also currently the spec-defined way to render WebGPU content to the screen.

Motivation

We want to be able to move away from CPU to GPU the operations involving ImageBitmap rendering context. This is also currently the spec-defined way to render WebGPU content to the screen.

Documentation

• https://html.spec.whatwg.org/#the-imagebitmap-rendering-context
• https://html.spec.whatwg.org/#the-offscreencanvas-interface

Specification

Specification link

Status: Unknown standards status - check spec link for status

Status in Chromium

Blink components: Blink>Canvas

Implementation status: Enabled by default (tracking bug)

Consensus & Standardization

• Firefox: In development
• Safari: In development
• Web Developers: No signals

Owners

• juanmihd@chromium.org
• fserb@chromium.org

Intent to Prototype url

Search tags

Last updated on 2021-11-26