Seems like a minor (low-risk) but valuable change to me. LGTM1 On Mon, Sep 21, 2026 at 1:21 PM 'Corentin Wallez' via blink-dev < [email protected]> wrote:
> Hey Alex, > > Correct! It would improve the compression fidelity of these formats (so > only the loss from the format is there, not the loss from resizing), which > will allow uses in more places, resulting in GPU memory gains. (most > commonly 4x, up to 16x). > > Cheers, > > Corentin > > On Mon, Sep 21, 2026 at 8:48 PM Alex Russell <[email protected]> > wrote: > >> Hey Corentin, >> >> For those of us who are not in the WebGPU head-space all day, is it fair >> to summarize this feature as improving memory use and compression fidelity >> for certain GPU image formats? >> >> Best, >> >> Alex >> >> On Friday, September 18, 2026 at 9:43:05 AM UTC-7 Chromestatus wrote: >> >>> *Contact emails* >>> [email protected] >>> >>> *Explainer* >>> >>> https://gpuweb.github.io/gpuweb/#dom-gpufeaturename-texture-compression-unaligned >>> >>> *Specification* >>> >>> https://gpuweb.github.io/gpuweb/#dom-gpufeaturename-texture-compression-unaligned >>> >>> *Summary* >>> Compressed texture (using the BC, ETC or ASTC formats) in unextended >>> WebGPU must have a size that's a multiple of the block size (4x4 or up to >>> 12x12). This is very constraining when compressing arbitrary images as a >>> resizing step must happen which looses high-frequency information. Most >>> hardware supports compressed textures with partial blocks at the border >>> such that the textures can have any size, removing this issue. >>> >>> *Blink component* >>> Blink>WebGPU >>> <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EWebGPU%22> >>> >>> *Web Feature ID* >>> webgpu <https://webstatus.dev/features/webgpu> >>> >>> *Motivation* >>> Compressed texture (using the BC, ETC or ASTC formats) in unextended >>> WebGPU must have a size that's a multiple of the block size (4x4 or up to >>> 12x12). This is very constraining when compressing arbitrary images as a >>> resizing step must happen which looses high-frequency information. Most >>> hardware supports compressed textures with partial blocks at the border >>> such that the textures can have any size, removing this issue. >>> >>> *Initial public proposal* >>> https://github.com/gpuweb/gpuweb/issues/2006 >>> >>> *TAG review* >>> *No information provided* >>> >>> *TAG review status* >>> Not applicable >>> >>> *Goals for experimentation* >>> None >>> >>> *Risks* >>> >>> >>> *Interoperability and Compatibility* >>> This feature has been approved in W3C GPU for the Web WG meetings >>> including participants from Safari and Firefox. >>> >>> *Gecko*: No signal (https://github.com/gpuweb/gpuweb/pull/6312) >>> Implementation >>> is ongoing https://github.com/gfx-rs/wgpu/pull/10247 Feedback indicated >>> via WebGPU standardization process. >>> >>> *WebKit*: Positive (https://github.com/gpuweb/gpuweb/pull/6312) >>> Specification >>> approval constitutes a positive signal, per >>> https://github.com/WebKit/standards-positions/issues/294#issuecomment-1877411933 >>> >>> *Web developers*: Positive ( >>> https://github.com/gpuweb/gpuweb/issues/2006#issuecomment-2910632703) Bevy, >>> Unity, Spark.js positive about this feature. >>> >>> *Other signals*: >>> >>> *WebView application risks* >>> >>> Does this intent deprecate or change behavior of existing APIs, such >>> that it has potentially high risk for Android WebView-based applications? >>> *No information provided* >>> >>> >>> *Debuggability* >>> *No information provided* >>> >>> *Will this feature be supported on all six Blink platforms (Windows, >>> Mac, Linux, ChromeOS, Android, and Android WebView)?* >>> Yes >>> All platforms have support, where hardware support is available. >>> >>> *Is this feature fully tested by web-platform-tests >>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?* >>> Yes >>> WebGPU/WGSL have a conformance test suite (https://github.com/gpuweb/cts) >>> that is regularly pulled into Chromium and part of the testing of Dawn/Tint >>> in Chromium. While the CTS can be embedded in WPT, the WebGPU team opted to >>> keep it separate in Chromium testing to use a customized harness for >>> robustness and performance. >>> >>> *Flag name on about://flags* >>> *No information provided* >>> >>> *Finch feature name* >>> WebGPUEnabledEnabledToggles >>> >>> *Rollout plan* >>> Will ship enabled for all users >>> >>> *Requires code in //chrome?* >>> False >>> >>> *Tracking bug* >>> https://crbug.com/528245806 >>> >>> *Estimated milestones* >>> >>> No milestones specified >>> >>> >>> *Anticipated spec changes* >>> >>> Open questions about a feature may be a source of future web compat or >>> interop issues. Please list open issues (e.g. links to known github issues >>> in the project for the feature specification) whose resolution may >>> introduce web compat/interop risk (e.g., changing to naming or structure of >>> the API in a non-backward-compatible way). >>> *No information provided* >>> >>> *Link to entry on the Chrome Platform Status* >>> https://chromestatus.com/feature/5080544005193728?gate=6068538249969664 >>> >>> This intent message was generated by Chrome Platform Status >>> <https://chromestatus.com>. >>> >> -- > You received this message because you are subscribed to the Google Groups > "blink-dev" 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/chromium.org/d/msgid/blink-dev/CAGdfWNNnCVe5QWrHFrsjbUjcyYFiR5ZbhqB38bj27RCm4k_wZA%40mail.gmail.com > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAGdfWNNnCVe5QWrHFrsjbUjcyYFiR5ZbhqB38bj27RCm4k_wZA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "blink-dev" group. 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