60342 2011-05-05 23:04:33 -0700 [chromium] Skia: Visible corner seam artifacts painting CSS outline property 2011-07-27 21:52:44 -0700 1 1 1 Unclassified WebKit CSS 528+ (Nightly build) Unspecified Unspecified RESOLVED DUPLICATE 61369 P2 Normal --- 61369 1 benwells webkit-unassigned benwells jamesr noel.gordon reed senorblanco oldest_to_newest 399345 0 92545 benwells 2011-05-05 23:04:33 -0700 Created attachment 92545 Test case Test case attached. 399346 1 benwells 2011-05-05 23:08:53 -0700 http://crbug.com/81777 399357 2 benwells 2011-05-05 23:23:51 -0700 Outline sides are drawn by GraphicsContext::drawConvexPolygon, with the shouldAntialias flag set false. This works on CG. If I change skia's implementation by adding one line paint.setAntiAlias(shouldAntialias); the artifacts in the corner seams / joins go away. Would this cause any problems with the work you're doing on borders? 399378 3 benwells 2011-05-06 00:28:14 -0700 The GraphicsContext::drawConvexPolygon is also used when drawing borders and changing it also changes how borders are drawn. In particular seams in borders between two colors no longer use anti-aliasing. The old border code in RenderBoxModelObject (defined out by PATH_BASED_BORDER_RADIUS_DRAWING) always calls drawConvexPolygon with shouldAntialias off. This is why there is a difference in test css2.1/t0805-c5516-brdr-c-00-a.html noted in bug 41311. 400311 4 benwells 2011-05-08 18:55:15 -0700 http://crbug.com/10354 402656 5 benwells 2011-05-11 22:11:32 -0700 When this bug is fixed, the #if !USE(SKIA) blocks in outline drawing in RenderObject.cpp and RenderInline.cpp should be removed to fix bug 58999 for skia. 443327 6 benwells 2011-07-27 21:52:44 -0700 *** This bug has been marked as a duplicate of bug 61369 *** 92545 2011-05-05 23:04:33 -0700 2011-05-05 23:04:33 -0700 Test case testcase-solid-color.html text/html 170 benwells PCFET0NUWVBFIGh0bWw+CjxzdHlsZT4gCiAgZGl2IHsKICAgIG1hcmdpbjogNjBweDsKICAgIHdp ZHRoOiA0MHB4OwogICAgaGVpZ2h0OiA0MHB4OwogICAgb3V0bGluZTogNDBweCBzb2xpZCByZ2Io MCwgMCwgMCk7CiAgfQo8L3N0eWxlPiAKPGJvZHk+IAogIDxkaXY+PC9kaXY+IAo8L2JvZHk+IAo=