Is Animated JXL currently supported? 在2026年8月24日星期一 UTC+8 19:37:11<[email protected]> 写道：
> Chromium sent an intent to ship: > https://groups.google.com/a/chromium.org/g/blink-dev/c/-gDojQbDPRI > > On Mon, Aug 24, 2026 at 6:07 AM Timothy Nikkel <[email protected]> wrote: > >> As of Firefox 157 I intend to turn JPEG XL decoding on by default on all >> platforms. It has been developed behind image.jxl.enabled, which today is >> on by default on Nightly only, and has had a Firefox Labs checkbox on every >> channel since 152. The decoder is jxl-rs, in Rust. >> >> Bug to turn on by default: >> https://bugzilla.mozilla.org/show_bug.cgi?id=2065096 >> >> Standard: ISO/IEC 18181, https://www.iso.org/standard/85066.html >> >> Standards body: ISO/IEC >> >> Platform coverage: all >> >> Preference: image.jxl.enabled >> >> Standards position: >> https://github.com/mozilla/standards-positions/issues/522 (neutral) >> >> TAG review: https://github.com/w3ctag/design-reviews/issues/633 >> (satisfied with concerns) >> >> Intent to prototype: >> https://groups.google.com/a/mozilla.org/d/msgid/dev-platform/53b4e3e0-5eee-4768-a1ba-b069e1e85244n%40mozilla.org >> >> Other browsers: Safari shipped in 17.0 in 2023. Chrome has it behind >> #enable-jxl-image-format using the same Rust library, no intent to ship yet. >> >> Changes since the intent to prototype: >> >> Performance was a concern raised on the intent to prototype thread. >> jxl-rs 0.6.0 was released with multithreaded decoding support, and our >> patches to hook up and enable multithreaded decoding are expected to land >> soon. Including those patches, I ran a five-format decode benchmark over >> the same pictures at a range of sizes: we were slightly ahead of Safari >> (using C++ libjxl) on my machine. Compared to our other image format >> decoders, JXL is close on large images, but shows a bigger gap on small >> ones. >> >> It has feature parity with our other image formats and with Blink's JXL >> implementation, including animation and progressive display. The one >> exception is HDR: HDR images display as SDR, the same as every other format >> we support, but our tone mapping for JXL is much better than what we do for >> other image formats. Safari has neither progressive rendering nor animation. >> >> The wpt jpegxl directory covers decode correctness across bit depths, >> alpha, grayscale, CMYK, colour management, orientation and the coding >> tools, plus the HTML and CSS ways an image gets used. Where wpt could not >> express something I added gecko tests: about 30 gtests for chunked and >> incremental decoding, animation frame counts, downscale during decode and >> corrupt files, mochitests for progressive rendering and telemetry, >> reftests, and decode benchmarks that report to Perfherder. The fuzzing team >> already fuzzed jxl before it was enabled on nightly and they will fuzz the >> decoder again before I flip the pref. >> >> >> Timothy Nikkel >> >> -- You received this message because you are subscribed to the Google Groups "[email protected]" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/a/mozilla.org/d/msgid/dev-platform/ab6bc21c-91c5-460a-9d49-2ef4c0b2b24dn%40mozilla.org.
