6291 2005-12-29 17:03:42 -0800 Drawing to a dynamically created canvas element before it is appended to document doesnt work 2006-03-08 18:27:37 -0800 1 1 1 Unclassified WebKit Layout and Rendering 420+ PC Windows XP RESOLVED DUPLICATE 4884 http://andrewwooldridge.com/canvas/canvastests/dynCanvas.html NeedsReduction P2 Normal --- 1 triptych webkit-unassigned dacarson oldest_to_newest 27180 0 triptych 2005-12-29 17:03:42 -0800 When a canvas element is created via document.createElement('canvas') and then drawn to via methods such as fillRect, the canvas does not reflect those method calls. However once the canvas has been appended to the document, subsequent calls to drawing methods "work". 27181 1 5360 triptych 2005-12-29 17:07:06 -0800 Created attachment 5360 simple html document illustrating the problem 31784 2 joost 2006-02-07 14:32:46 -0800 If you click the second link in the testcase first, nothing happens, the other way around, it does. Needs a better reduction but i think i can confirm this one. 31793 3 triptych 2006-02-07 17:17:31 -0800 To further explain the sample document. The first click tries to create a canvas element, draw to it then append it to the document. In safari you wont see a black square in the canvas after you click the first link, however in opera and Firefox you do. 35572 4 dacarson 2006-03-08 16:47:35 -0800 The problem seems to be that the Canvas render object (RenderCanvasImage) has not been created yet, although there is a valid DOM element. By memory, render objects are not created until they are attached to the DOM tree. I believe this is because the engine does not know how to provide the style information needed to create a render object until it knows it's location within the tree. So, although the getContext function will return with a valid canvas context, no methods on that object will succeed until it is attached to the DOM. I am not sure what can be done about this. 35574 5 dacarson 2006-03-08 16:58:10 -0800 The same root cause as http://bugzilla.opendarwin.org/show_bug.cgi?id=4884 35579 6 dacarson 2006-03-08 18:27:37 -0800 *** This bug has been marked as a duplicate of 4884 *** 5360 2005-12-29 17:07:06 -0800 2005-12-29 17:07:06 -0800 simple html document illustrating the problem dynCanvas.html text/html 1138 triptych PCFET0NUWVBFIEhUTUwgUFVCTElDICItLy9XM0MvL0RURCBIVE1MIDQuMDEgVHJhbnNpdGlvbmFs Ly9FTiI+DQo8aHRtbD4NCiAgPGhlYWQ+DQogIDxtZXRhIGh0dHAtZXF1aXY9ImNvbnRlbnQtdHlw ZSIgY29udGVudD0idGV4dC9odG1sOyBjaGFyc2V0PXdpbmRvd3MtMTI1MCI+DQogIDxtZXRhIG5h bWU9ImdlbmVyYXRvciIgY29udGVudD0iUFNQYWQgZWRpdG9yLCB3d3cucHNwYWQuY29tIj4NCiAg PHRpdGxlPjwvdGl0bGU+DQogIDxzdHlsZT4NCiAgICBjYW52YXMge2JvcmRlcjogMXB4IHNvbGlk IGdyZWVuO30NCiAgPC9zdHlsZT4NCiAgPC9oZWFkPg0KICA8Ym9keT4NCiAgPHNjcmlwdD4NCiAg ZnVuY3Rpb24gY3JlYXRlQ2FudmFzKCl7DQogICAgdmFyIG5ld0NhbnZhcyA9IGRvY3VtZW50LmNy ZWF0ZUVsZW1lbnQoJ2NhbnZhcycpOw0KICAgIG5ld0NhbnZhcy5zZXRBdHRyaWJ1dGUoJ2hlaWdo dCcsMjAwKQ0KICAgIG5ld0NhbnZhcy5zZXRBdHRyaWJ1dGUoJ3dpZHRoJywyMDApDQogICAgbmV3 Q2FudmFzLnNldEF0dHJpYnV0ZSgnaWQnLCdjYW52YXMwMDEnKQ0KICAgIGN0eCA9IG5ld0NhbnZh cy5nZXRDb250ZXh0KCcyZCcpOw0KICAgIGN0eC5maWxsUmVjdCgwLDAsMTAwLDEwMCk7DQogICAg ZG9jdW1lbnQuZ2V0RWxlbWVudEJ5SWQoJ2NhbnZhc2NyaWInKS5hcHBlbmRDaGlsZChuZXdDYW52 YXMpOw0KICB9DQogIGZ1bmN0aW9uIGRyYXdDYW52YXMoKXsNCiAgICB0aGVDYW52YXMgPSBkb2N1 bWVudC5nZXRFbGVtZW50QnlJZCgnY2FudmFzMDAxJykNCiAgICAgICAgY3R4ID0gdGhlQ2FudmFz LmdldENvbnRleHQoJzJkJyk7DQogICAgICAgIGN0eC5maWxsU3R5bGUgPSAiZ3JlZW4iOw0KICAg ICAgY3R4LmZpbGxSZWN0KDMwLDMwLDEwMCwxMDApOw0KICB9DQogIDwvc2NyaXB0Pg0KICA8YSBo cmVmPSJqYXZhc2NyaXB0OmNyZWF0ZUNhbnZhcygpIj5jbGljayBoZXJlIHRvIGNyZWF0ZSBhIGNh bnZhcyBlbGVtZW50IHZpYSBqYXZhc2NyaXB0PC9hPg0KIDxicj4NCiAgIDxhIGhyZWY9ImphdmFz Y3JpcHQ6ZHJhd0NhbnZhcygpIj5jbGljayBoZXJlIHRvIGRyYXcgYW5vdGhlciBib3g8L2E+IA0K ICA8ZGl2IGlkPSJjYW52YXNjcmliIj4NCiAgPC9kaXY+DQogIDwvYm9keT4NCjwvaHRtbD4NCg==