6795 2006-01-25 10:58:58 -0800 Slow image load causes render problem. 2006-03-18 21:46:52 -0800 1 1 1 Unclassified WebKit Layout and Rendering 420+ Mac OS X 10.4 RESOLVED FIXED HasReduction P2 Normal --- 1 shr3kst3r webkit-unassigned gruber info mitz oldest_to_newest 29867 0 shr3kst3r 2006-01-25 10:58:58 -0800 I have tried to reduce this problem down as much as possible. But, as you can see the test case still has a bunch of junk still in it, and when I tried to remove the rest of these tags, it caused the problem to dissappear (which was bad). My test case uses a specialized image which is really a php script that creates a randomly colored image that changes on every load and also has a three second sleep. This was done to cause the image to load slowly and also to stop caching of the image. When the page is loaded the text is drawn on the page and when finally drawn to the page, the text is pushed down, but the html in the div holding "Problem Here" text is pushed down, but also another box appears at the top of the page. The boxes are connected, because if you click on the button at the bottom of the page, it will check the button on the top instance. These seems to affect both 417.x and 420+. 29869 1 5951 shr3kst3r 2006-01-25 10:59:40 -0800 Created attachment 5951 Bug Example Here is the example of the bug. 32760 2 joost 2006-02-15 13:59:09 -0800 Confirmed, this needs more reduction. 32963 3 6542 mitz 2006-02-16 08:02:37 -0800 Created attachment 6542 Reduced testcase 33026 4 6545 mitz 2006-02-16 10:49:08 -0800 Created attachment 6545 Proposed patch The test is pixels-only since the render tree was correct. 33213 5 6545 darin 2006-02-17 18:20:39 -0800 Comment on attachment 6545 Proposed patch Looks right to me, but this is one Hyatt should review. 33646 6 6545 hyatt 2006-02-21 15:01:03 -0800 Comment on attachment 6545 Proposed patch I will need to think about this. My gut says this is overkill, but my gut has been wrong before. :) 33648 7 hyatt 2006-02-21 15:13:04 -0800 The reason I'm nervous here is we had some horribly pathological behavior (as in pages with nested divs and complex float/margin combinations causing Safari to beachball) that the yPosEstimate stuff helped to prevent, and doing too much of the heavyweight marking can send you into a death spiral of relayout. 33786 8 hyatt 2006-02-23 11:05:49 -0800 I do think this is probably on the right track and maybe just needs a little refinement. One problem I see is that won't this get triggered on the initial layout of elements, since oldChildY will be 0? 36012 9 mitz 2006-03-12 10:05:57 -0800 *** Bug 6270 has been marked as a duplicate of this bug. *** 36189 10 mitz 2006-03-13 23:10:10 -0800 As Hyatt suggested on IRC, I ran the layout tests and logged the ones where the additional marking was done: css1/box_properties/acid_test css1/box_properties/float css2.1/t09-c5526c-display-00-e css2.1/t0905-c414-flt-fit-01-d-g css2.1/t0905-c5525-fltmult-00-d-g fast/block/basic/011 fast/block/float/016 fast/block/float/024 fast/block/float/031 fast/block/margin-collapse/045 fast/block/margin-collapse/063 fast/css-generated-content/012 I'm not sure I see the problem with initial layout. Wouldn't all descendants be marked for layout anyway? 36322 11 6545 hyatt 2006-03-14 14:42:26 -0800 Comment on attachment 6545 Proposed patch r=me, make sure we have some good tests for this. 5951 2006-01-25 10:59:40 -0800 2006-01-25 10:59:40 -0800 Bug Example double_test.html text/html 977 shr3kst3r PGh0bWw+Cgk8aGVhZD4KCQk8c3R5bGUgdHlwZT0idGV4dC9jc3MiPgoJCQkjdGV4dCB7CgkJCQlm bG9hdDogcmlnaHQ7CgkJCQl0ZXh0LWFsaWduOiBsZWZ0OwoJCQkJbWFyZ2luLXRvcDogNDBweDsK CQkJCXBhZGRpbmctdG9wOiAxMHB4OwoJCQkJcGFkZGluZy1sZWZ0OiA1cHg7CgkJCQlwYWRkaW5n LWJvdHRvbTogNXB4OwoJCQkJYm9yZGVyLWxlZnQ6IHNvbGlkIDFweCBncmV5OwoJCQkJYm9yZGVy LWJvdHRvbTogc29saWQgMXB4IGdyZXk7CgkJCX0KCQk8L3N0eWxlPgoJPC9oZWFkPgoJPGJvZHk+ CgkJCgkJPGZvcm0gYWN0aW9uPWluZGV4Lmh0bWwgbWV0aG9kPXBvc3QgbmFtZT1mb3JtMT4KCQkJ PGRpdiBpZD10ZXh0PgoJCQkJPGI+UHJvYmxlbSBIZXJlPC9iPgoJCQkJPGlucHV0IHR5cGU9InJh ZGlvIiBuYW1lPSJ0ZXN0IiB2YWx1ZT0idGVzdDJfZm9ybTIiPlRlc3QKCQkJCTx0YWJsZT48dHI+ PHRkPjwvdGQ+PC90cj48L3RhYmxlPgoJCQk8L2Rpdj4KCQkJPElNRyBTUkM9Imh0dHA6Ly93d3cu 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