36226 2010-03-17 10:00:17 -0700 [Qt] canvas arc element doesn't render correctly 2010-08-16 17:13:03 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) PC Linux RESOLVED FIXED HTML5 P2 Normal --- 1 lonhutt webkit-unassigned hausmann kling krit oldest_to_newest 200834 0 lonhutt 2010-03-17 10:00:17 -0700 the endpoint of a canvas arc element renders with a jagged edge at the start point. the easiest way i've found to see the effect is to install the Arora web browser and view the attached HTML file. Alternatively create a simple Qt web browser that points at the provided HTML file. I have been unable to reproduce this error in any other WebKit based browser (tested Chrome, Safari, Konqueror) which makes me think it must be a Qt specific bug. 200949 1 50952 lonhutt 2010-03-17 13:46:35 -0700 Created attachment 50952 html file that describes 2 canvas arc shapes 204482 2 krit 2010-03-26 03:22:32 -0700 This is a Qt-bug. If you create a new path, the starting point is set to 0,0. A workaround is setting moveTo after beginning a new path. 210319 3 lonhutt 2010-04-08 12:24:18 -0700 I changed: ctx.beginPath(); ctx.lineWidth = 8; ctx.strokeStyle = "#33CCCC"; ctx.arc(342, 212, 56.25714285714286, 6.997183637540902, 7.5683823018299545, false); ctx.stroke(); ctx.closePath(); to: ctx.beginPath(); ctx.moveTo(342, 212); ctx.lineWidth = 8; ctx.strokeStyle = "#33CCCC"; ctx.arc(342, 212, 56.25714285714286, 6.997183637540902, 7.5683823018299545, false); ctx.stroke(); ctx.closePath(); with no results. What am I doing wrong? 220933 4 kling 2010-05-04 18:46:00 -0700 @Dirk: I think you guys are talking about two separate issues :) I've posted a patch for yours at https://bugs.webkit.org/show_bug.cgi?id=38526 @lonhutt: Jagged edge confirmed on ToT, will investigate. 265304 5 kling 2010-08-16 17:13:03 -0700 This was indeed fixed with http://trac.webkit.org/changeset/59767 50952 2010-03-17 13:46:35 -0700 2010-03-17 13:46:35 -0700 html file that describes 2 canvas arc shapes canvasarc.html text/html 1017 lonhutt PGh0bWw+IAogIDxoZWFkPiAKICAgIDx0aXRsZT5BIGNhbnZhcyBhcmMgZXhhbXBsZTwvdGl0bGU+ IAogICAgPHNjcmlwdCB0eXBlPSJ0ZXh0L2phdmFzY3JpcHQiPiAKZnVuY3Rpb24gZHJhd1NoYXBl KCl7CiAgLy8gZ2V0IHRoZSBjYW52YXMgZWxlbWVudCB1c2luZyB0aGUgRE9NCiAgdmFyIGNhbnZh cyA9IGRvY3VtZW50LmdldEVsZW1lbnRCeUlkKCd0dXRvcmlhbCcpOwogCiAgLy8gTWFrZSBzdXJl IHdlIGRvbid0IGV4ZWN1dGUgd2hlbiBjYW52YXMgaXNuJ3Qgc3VwcG9ydGVkCiAgaWYgKGNhbnZh cy5nZXRDb250ZXh0KXsKIAogICAgLy8gdXNlIGdldENvbnRleHQgdG8gdXNlIHRoZSBjYW52YXMg Zm9yIGRyYXdpbmcKICAgIHZhciBjdHggPSBjYW52YXMuZ2V0Q29udGV4dCgnMmQnKTsKIAogICAg Ly8gRHJhdyBzaGFwZXMKICAgIGN0eC5iZWdpblBhdGgoKTsKICAgIGN0eC5saW5lV2lkdGggPSA4 OwogICAgY3R4LnN0cm9rZVN0eWxlID0gIiMzM0NDQ0MiOwogICAgY3R4LmFyYygzNDIsIDIxMiwg NTYuMjU3MTQyODU3MTQyODYsIDYuOTk3MTgzNjM3NTQwOTAyLCA3LjU2ODM4MjMwMTgyOTk1NDUs IGZhbHNlKTsKICAgIGN0eC5zdHJva2UoKTsKICAgIGN0eC5jbG9zZVBhdGgoKTsKCiAgICBjdHgu YmVnaW5QYXRoKCk7CiAgICBjdHgubGluZVdpZHRoID0gNTsKICAgIGN0eC5zdHJva2VTdHlsZSA9 ICIjMTFGQTA5IjsKICAgIGN0eC5hcmMoMTUwLCAxNTAsIDUwLCA2LjUsIDcuNSwgdHJ1ZSk7CiAg ICBjdHguc3Ryb2tlKCk7CiAgICBjdHguY2xvc2VQYXRoKCk7Cn0KfQogCiAgICA8L3NjcmlwdD4g CiAgICAKICA8L2hlYWQ+IAogCiAgPGJvZHkgb25sb2FkPSJkcmF3U2hhcGUoKTsiPiAKICAgIDxo MT5BIGNhbnZhcyA8Y29kZT5hcmM8L2NvZGU+IGV4YW1wbGU8L2gxPiAKICAgIDxkaXY+IAogICAg ICA8Y2FudmFzIGlkPSJ0dXRvcmlhbCIgd2lkdGg9IjgwMCIgaGVpZ2h0PSI2MDAiPjwvY2FudmFz PiAKICAgICAgCiAKICAgIDwvZGl2PiAKICA8L2JvZHk+IAogCjwvaHRtbD4gCiAK