HDR test case doesn't render properly in Firefox
Categories
(Web Compatibility :: Site Reports, defect, P2)
Tracking
(Webcompat Priority:P2, Webcompat Score:5)
People
(Reporter: jrmuizel, Unassigned, NeedInfo)
References
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Details
(Keywords: webcompat:needs-diagnosis, webcompat:site-report)
User Story
platform:windows,mac,linux,android impact:site-broken configuration:general affects:all branch:release diagnosis-team:graphics user-impact-score:200
This renders quite a bit differently from Safari which I don't think has shipped HDR image support:
https://pub-advancedmedialab.s3-us-east-2.amazonaws.com/2094-50/SDR-PQ-HLG-PNG-mapping-test/2094-50.html
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Reporter | |
Comment 1•17 days ago
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Tim, I think this might be related to our bad handling of HDR images
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Reporter | |
Updated•17 days ago
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Reporter | |
Comment 2•17 days ago
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From the reporter:
If you try open this page in FireFox, the images are tonemapping incorrectly compared to Chromium:
The HDR images which contain PNG 3rd Edition cICP chunks should be seen as PQ HDR images and mapped into the target space.
The SDR images should be mapped into the target display space.
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Updated•16 days ago
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SDR Images should be mapped to 203 cd/m^2 in PQ-BT.2100 HDR Space. This follows the BT.2408 and MovieLabs recommendations. We are working on adding the signaling a specific reference white luminance level. This will help in the future.
In all cases, CICP would be parsed to correctly identify color primaries, transfer function, matrix coefficients AND signal range (narrow/full). This is functionally possible with HEIF, AVIF, MOV, MP4, MXF, TIFF via ICC(cicp tags), PNG 3rd Edition (cICP, MDCV, CLLI chunks) and others.
Description
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