On Fri, Aug 18, 2023 at 8:25 PM Yi Xu <[email protected]> wrote: > Contact [email protected], [email protected], [email protected] > > Explainer > https://learn.microsoft.com/en-us/typography/opentype/spec/baselinetags > > Specification > https://html.spec.whatwg.org/multipage/canvas.html#textmetrics > we are launching the following attributes in TextMetrics: > alphabeticBaseline, hangingBaseline and ideographicBaseline > > *Tag Review* > https://github.com/w3ctag/design-reviews/issues/302 > > Summary > > This is the 4th installment in extending the TextMetrics API (first > attempt link > <https://groups.google.com/a/chromium.org/forum/#!searchin/blink-dev/intent$20to$20ship$20textmetrics%7Csort:date/blink-dev/KQW4thKogkk/SiE-xZ7OAQAJ> > , second attempt > <https://groups.google.com/a/chromium.org/g/blink-dev/c/dTL2nW5mhGc>, third > attempt) > <https://groups.google.com/a/chromium.org/g/blink-dev/c/GSmWjdqmgCA/m/F8YRklTQCQAJ> > .The current canvas TextMetrics API exposes the actualBoundingBox and the > fontBoundingBox readings. The definition of baseline is more clear now. > Both Firefox and Safari have already shipped this *extension to > TextMetrics*. >
Thanks for pushing through this!! Any details on why the past attempts weren't successful? > > The original feature bug (https://crbug.com/277215) has strong user > support (23 stars). > > Blink componentBlink>Canvas > <https://bugs.chromium.org/p/chromium/issues/list?q=component%3ABlink%3ECanvas&can=2> > > Is this feature supported on all six Blink platforms (Windows, Mac, Linux, > Chrome OS, Android, and Android WebView)? > > Yes > > > Is this feature fully tested by web-platform-tests > <https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md>? > Link to test suite results from wpt.fyi > <https://wpt.fyi/results/?label=experimental>. > > > https://wpt.fyi/results/html/canvas/element/text/2d.text.measure.baselines.html?label=experimental&label=master&aligned > > Entry on the feature dashboard <http://www.chromestatus.com/> > > https://chromestatus.com/feature/6516079022571520 > > > Risks > > Interoperability and Compatibility > > Safari and Firefox have has already shipped these metrics in the spec. > > > > Firefox: <https://bugzilla.mozilla.org/show_bug.cgi?id=1102584>Shipped > <https://bugzilla.mozilla.org/show_bug.cgi?id=1102584> > > Safari: Shipped <https://bugs.webkit.org/show_bug.cgi?id=157629> > > > > We know this is a feature requested by developers (as well as internal > Google teams like Google Docs). This API will help developers have more > control and more accurate text rendering. As of today a different way to > achieve this is by using rendering text to the DOM and using > getBoundingClientRect to get some measurements. This process requires a > relayout of the page. > > > > Activation > > Enable the platform experiment ExtendedTextMetrics > > -- > 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 on the web visit > https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAC3hXJeKqXo9QKyreEM%2BqiNM0gi_us%3DWZ_-17AxpMg-bF%2BoLkA%40mail.gmail.com > <https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAC3hXJeKqXo9QKyreEM%2BqiNM0gi_us%3DWZ_-17AxpMg-bF%2BoLkA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- 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 on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAL5BFfW4fhaAJkvPKi-_qYt8F-p8jTng%3Dc3dscFEdONNTO_Vjw%40mail.gmail.com.
