82997 2012-04-02 20:16:09 -0700 [chromium] Fix layer sorting perspective w if w becomes negative 2012-04-09 12:32:24 -0700 1 1 1 Unclassified WebKit Layout and Rendering 528+ (Nightly build) Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 shawnsingh shawnsingh cc-bugs enne jamesr vangelis webkit.review.bot oldest_to_newest 594164 0 shawnsingh 2012-04-02 20:16:09 -0700 A follow-up to https://bugs.webkit.org/show_bug.cgi?id=80806 There are still some minor flashing/sorting artifacts that occur that are most likely to to this issue. 597623 1 shawnsingh 2012-04-06 13:44:12 -0700 So here's the situation: I was able to whip up a quick fix for this, and it did fix the flashing sorting artifacts that we were seeing: - css space cube demo - mozilla cardboard box + paper sheep demo However, the fix as I've hacked it currently, uses only a sub-portion of the clipped geometry to do layer sorting. (so that I can still use FloatQuad instead of the clipped polygon). Of course, this causes other potential layer sorting bugs, for example, it regresses acko.net to have flaky sorting again. There are two options I can think of to fix this: (1) make layer sorter work with general clipped polygons of up to 8 vertices. We can create a quick data structure, ClippedQuad, that internally holds up to 8 vertices without using the allocator. (2) make layer sorter support multiple quads per layer and accumulate all topological dependencies for all quads. Any preferences? At the moment it seems like #2 will be easier to implement. 597722 2 shawnsingh 2012-04-06 15:22:07 -0700 (In reply to comment #1) > Of course, this causes other potential layer sorting bugs, for example, it regresses acko.net to have flaky sorting again. > Actually, those acko.net sorting bugs already existed, even before the previous perspective clipping patch. So my fix should be OK without forcing more complexity. 597813 3 136096 shawnsingh 2012-04-06 16:48:15 -0700 Created attachment 136096 Working fix, without unit test yet 598138 4 136184 shawnsingh 2012-04-08 22:14:20 -0700 Created attachment 136184 Patch with unit test Shuffled around some CCMathUtil code at the same time, for cleanliness 598378 5 136184 enne 2012-04-09 10:12:47 -0700 Comment on attachment 136184 Patch with unit test R=me. 598401 6 136184 shawnsingh 2012-04-09 10:28:48 -0700 Comment on attachment 136184 Patch with unit test Thanks! 598525 7 136184 webkit.review.bot 2012-04-09 12:32:19 -0700 Comment on attachment 136184 Patch with unit test Clearing flags on attachment: 136184 Committed r113606: <http://trac.webkit.org/changeset/113606> 598526 8 webkit.review.bot 2012-04-09 12:32:24 -0700 All reviewed patches have been landed. Closing bug. 136096 2012-04-06 16:48:15 -0700 2012-04-08 22:14:17 -0700 Working fix, without unit test yet bug-82997-20120406164814.patch text/plain 9803 shawnsingh U3VidmVyc2lvbiBSZXZpc2lvbjogMTEzNDU2CmRpZmYgLS1naXQgYS9Tb3VyY2UvV2ViQ29yZS9w bGF0Zm9ybS9ncmFwaGljcy9jaHJvbWl1bS9jYy9DQ0xheWVyU29ydGVyLmNwcCBiL1NvdXJjZS9X ZWJDb3JlL3BsYXRmb3JtL2dyYXBoaWNzL2Nocm9taXVtL2NjL0NDTGF5ZXJTb3J0ZXIuY3BwCmlu ZGV4IDMxZDRlNjAzOGE5MzZhZjkzNjkwOWY2ZWU5NWFkM2FlNDk2MWFlZjAuLmU2MGYwYjMwZWE2 YTkzZTM0NTBjNmY4YjY3ODZlMDNkN2I4YjVkMDAgMTAwNjQ0Ci0tLSBhL1NvdXJjZS9XZWJDb3Jl L3BsYXRmb3JtL2dyYXBoaWNzL2Nocm9taXVtL2NjL0NDTGF5ZXJTb3J0ZXIuY3BwCisrKyBiL1Nv dXJjZS9XZWJDb3JlL3BsYXRmb3JtL2dyYXBoaWNzL2Nocm9taXVtL2NjL0NDTGF5ZXJTb3J0ZXIu Y3BwCkBAIC0yNyw2ICsyNyw3IEBACiAjaW5jbHVkZSAiY2MvQ0NMYXllclNvcnRlci5oIgogCiAj aW5jbHVkZSAiVHJhbnNmb3JtYXRpb25NYXRyaXguaCIKKyNpbmNsdWRlICJjYy9DQ01hdGhVdGls LmgiCiAjaW5jbHVkZSAiY2MvQ0NSZW5kZXJTdXJmYWNlLmgiCiAjaW5jbHVkZSA8bGltaXRzLmg+ 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