FF132 Add webgl2rendering unpackColorSpace

[hamishwillee]

FF123 adds support for gl.unpackColorSpace and drawingBufferColorSpace(). This copies the docs from the WebGLRenderingContext to WebGL2RenderingContext.

Note that the docs story in WebGL is a bit confusing. WebGL2RenderingContext is built on top of WebGLRenderingContext and includes everything it has plus some additions (new stuff and new additions to the old stuff). But for docs mostly the second version does not duplicate the original - but there are some exceptions. I think we should duplicate everything because it makes things more sane and the sidebar makes more sense.

Anyway, given that there was some duplication I chose to copy these two as well.

This is part of #36112

[github-actions]

Preview URLs

• /en-US/docs/Web/API/WebGL2RenderingContext/drawingBufferColorSpace
• /en-US/docs/Web/API/WebGL2RenderingContext/unpackColorSpace
• /en-US/docs/Web/API/WebGL2RenderingContext
• /en-US/docs/Web/API/WebGLRenderingContext/unpackColorSpace

Flaws (2)

Note! 3 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/Web/API/WebGL2RenderingContext/unpackColorSpace
Title: WebGL2RenderingContext: unpackColorSpace property
Flaw count: 2

• broken_links:
  • Can't resolve /en-US/docs/Web/API/WebGL2RenderingContext/texImage2D
  • Can't resolve /en-US/docs/Web/API/WebGL2RenderingContext/texSubImage2D

External URLs (4)

URL: /en-US/docs/Web/API/WebGL2RenderingContext/unpackColorSpace
Title: WebGL2RenderingContext: unpackColorSpace property

• https://en.wikipedia.org/wiki/DCI-P3 (1 time) (Note! This may be a new URL 👀)
• https://en.wikipedia.org/wiki/SRGB (1 time) (Note! This may be a new URL 👀)

---

URL: /en-US/docs/Web/API/WebGL2RenderingContext/drawingBufferColorSpace
Title: WebGL2RenderingContext: drawingBufferColorSpace property

• https://en.wikipedia.org/wiki/DCI-P3 (1 time) (Note! This may be a new URL 👀)
• https://en.wikipedia.org/wiki/SRGB (1 time) (Note! This may be a new URL 👀)