HDR interactions with 2D canvas, WebGL and WebGPU

[ccameron-chromium]

Specification title

HDR interactions with 2D canvas, WebGL and WebGPU

Specification or proposal URL (if available)

https://github.com/w3c/ColorWeb-CG/blob/main/hdr-big-picture.md

Proposal author(s)

@ccameron-chromium

Mozillians who can provide input

@ladyhavoc, @jimblandy

WebKit standards-position

WebKit/standards-positions#618

Other information

This is an overarching proposal that has the goal of covering HDR for 2D canvas, WebGL, and WebGPU in a coherent way. The "big picture" document linked above has much of the background. The individual features for each API are:

• HDR resource importing and drawing
  • 2D canvas: https://github.com/w3c/ColorWeb-CG/blob/main/canvas-compositing-headroom.md
  • WebGL: https://github.com/w3c/ColorWeb-CG/blob/main/webgl-unpack-headroom.md
  • WebGPU: https://github.com/w3c/ColorWeb-CG/blob/main/webgpu-external-headroom.md
• HDR canvas display:
  • 2D canvas: https://github.com/w3c/ColorWeb-CG/blob/main/canvas-tone-map.md
  • WebGL: https://github.com/w3c/ColorWeb-CG/blob/main/webgl-drawing-buffer-tone-map.md
  • WebGPU is already shipping