[Wayland] Pass through sRGB instead of re-encoding as gamma 2.2 [chromium/src : main]
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Thomas Anderson (Gerrit)
Nov 3, 2025, 3:43:56 PM (3 days ago) Nov 3
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Kramer Ge (Gerrit)
Nov 4, 2025, 4:48:12 PM (2 days ago) Nov 4
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Thomas Anderson (Gerrit)
Nov 4, 2025, 6:55:49 PM (2 days ago) Nov 4
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Chromium LUCI CQ (Gerrit)
Nov 4, 2025, 6:58:43 PM (2 days ago) Nov 4
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3 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.
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Commit message:
[Wayland] Pass through sRGB instead of re-encoding as gamma 2.2
This CL changes the TF for SDR content from gamma 2.2 to sRGB. The
wayland spec says this about sRGB: "sRGB material is intended to be
viewed on an sRGB display, and that is described by gamma22." However
there is disagreement: "Regardless of the original intents of the
specification writers, 'sRGB' displays have always decoded their signal
with 2.2 power-law. That produces the look that artists and content
authors have tuned their works for and what end users expect. Changing
that is both unnecessary and would lead to complaints" [2].
[1] https://wayland.app/protocols/color-management-v1
[2]
https://gitlab.freedesktop.org/pq/color-and-hdr/-/blob/bcad995181cc1931ed28aa8ba4b9ea843843d60c/doc/wayland_qa.md#L79
R=fangzhoug
Fixed: 449423580
Change-Id: I7c4f0597ba76c67beb1ad4ed796bc318cdfc3758
Commit-Queue: Thomas Anderson <thomasa...@chromium.org>
Reviewed-by: Kramer Ge <fang...@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1540371}
Files:
- M ui/ozone/platform/wayland/host/wayland_wp_image_description.cc
Change size: XS
Delta: 1 file changed, 6 insertions(+), 0 deletions(-)
Branch: refs/heads/main
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Code-Review: +1 by Kramer Ge
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