WebKittens

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Title of the proposal

CanvasCompositing globalHDRHeadroom attribute

URL to the spec

https://github.com/ccameron-chromium/ColorWeb-CG/blob/master/canvas2d_hdr_headroom.md

URL to the spec's repository

No response

Issue Tracker URL

whatwg/html#11165

Explainer URL

No response

TAG Design Review URL

w3ctag/design-reviews#917

Mozilla standards-positions issue URL

No response

WebKit Bugzilla URL

No response

Radar URL

No response

Description

This allows specifying the HDR headroom for drawing content to 2D canvas. There exist analogous APIs for WebGL and WebGPU when copying content to a 2D texture. See:

• copyExternalImageToTexture/importExternalTexture: Add HDR headroom parameter gpuweb/gpuweb#5236
• Add unpackHDRHeadroom attribute for tone mapping KhronosGroup/WebGL#3735