38463 2010-05-03 07:38:08 -0700 Fails on Canvas test case: http://philip.html5.org/tests/canvas/suite/tests/2d.text.draw.baseline.top.html 2025-03-18 15:24:09 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) PC OS X 10.5 NEW BrowserCompat P2 Normal --- 20553 1 cshu webkit-unassigned adele ahmad.saleem792 eae laszlo.gombos leviw mdelaney7 mmaxfield robert tony oldest_to_newest 220098 0 cshu 2010-05-03 07:38:08 -0700 http://philip.html5.org/tests/canvas/suite/tests/2d.text.draw.baseline.top.html Run above test case on Safari. Actual result: failed Expected result: pass The same test case passes on Firefox4.6. 224189 1 mdelaney7 2010-05-11 15:31:52 -0700 Also fails on both Opera 10.53 and Chrome 5.0.375.38 beta on Snow Leopard. 819112 2 robert 2013-01-29 11:10:53 -0800 I'd love to know what's going on with our font metrics here. The reason we fail this and the other canvas baseline tests is down to the ascent and descent we calculate for the font before drawing it. I imagine this varies between platforms but I've tested it on Chromium Linux. Tony - this must be FontMetrics 101, can you shed any light on why Firefox and Chromium Linux (for example) return different ascent/descent for the same font? The person at http://mudcu.be/journal/2011/01/html5-typographic-metrics/#baselineCanvas looked into this a bit and concluded it was 'invisible space'. :) 819188 3 tony 2013-01-29 12:21:43 -0800 I actually know very little about font metrics and don't know where this extra 'invisible space' comes from. Levi or Emil probably know more. 821685 4 leviw 2013-01-31 10:57:23 -0800 (In reply to comment #3) > I actually know very little about font metrics and don't know where this extra 'invisible space' comes from. Levi or Emil probably know more. I'm afraid this one is beyond my expertise as well :-/ 1873411 5 ahmad.saleem792 2022-06-01 15:58:34 -0700 I am still able to reproduce this bug using the test link in Comment 01 in Safari 15.5 on macOS 12.4. All other browsers like Chrome Canary 104 and Firefox Nightly 103 pass the test. Thanks!