82777 2012-03-30 14:02:41 -0700 Subpixel antialiasing missing in some elements that overlay a graphics accelerated element 2013-11-08 17:52:53 -0800 1 1 1 Unclassified WebKit Text 528+ (Nightly build) All All RESOLVED DUPLICATE 23364 P2 Normal --- 0 timehat webkit-unassigned simon.fraser oldest_to_newest 592480 0 134875 timehat 2012-03-30 14:02:41 -0700 Created attachment 134875 Example file In the attached example, the <h1> ("Page Title") tag is graphics-accelerated ("-webkit-transform: transform3d(0,0,0)"). The dialog <div> overlaps the <h1> tag (made visible with an semi-transparent background). The text inside the <h2> tag (which is inside the dialog <div>) does not have any sub-pixel font smoothing. Adding a background-color to the <h2> tag will enable sub-pixel antialiasing again. It seems this shouldn't be necessary since the "dialog-content" <div> already has an opaque background color. Changing the "top: 5%" to "top: 15%" (maybe higher, depending on window size...) on the "dialog" <div> will also re-enable sub-pixel antialiasing (since that div will no longer overlay the graphics-accelerated <h1> tag. Seeing this in Safari on Mac OS X Snow Leopard [Version 5.1.4 (6534.54.16)], Chrome on Mac OS X Snow Leopard [17.0.963.83], Chrome on Windows 7 [18.0.1025.142 m]. 948967 1 simon.fraser 2013-11-08 17:52:53 -0800 *** This bug has been marked as a duplicate of bug 23364 *** 134875 2012-03-30 14:02:41 -0700 2012-03-30 14:02:41 -0700 Example file webkit subpixel rendering bug.html text/html 693 timehat PCFET0NUWVBFIGh0bWw+CjxodG1sPgo8aGVhZD4KICA8dGl0bGU+VGVzdCBTdWJwaXhlbCBTbW9v dGhpbmc8L3RpdGxlPgogIDxzdHlsZSB0eXBlPSJ0ZXh0L2NzcyI+CiAgICBoMSB7CgogICAgfQog ICAgCiAgICAuaGVhZGluZyB7CiAgICAgIC13ZWJraXQtdHJhbnNmb3JtOiB0cmFuc2xhdGUzZCgw LCAwLCAwKTsKICAgIH0KICAgIAogICAgLmRpYWxvZyB7CiAgICAgIHBvc2l0aW9uOiBhYnNvbHV0 ZTsKICAgICAgdG9wOiA1JTsKICAgICAgbGVmdDogNSU7CiAgICAgIGJhY2tncm91bmQtY29sb3I6 IHJnYmEoMCwwLDAsLjUpOwogICAgICB3aWR0aDogOTAlOwogICAgICBoZWlnaHQ6IDkwJTsKICAg IH0KICAgIAogICAgLmRpYWxvZy1jb250ZW50IHsKICAgICAgbWFyZ2luOiAyNXB4OwogICAgICBw YWRkaW5nOiAxMHB4OwogICAgICBiYWNrZ3JvdW5kLWNvbG9yOiB3aGl0ZTsKICAgIH0KICAgIAog ICAgaDIgewogICAgICBwb3NpdGlvbjogcmVsYXRpdmU7CiAgICB9CiAgPC9zdHlsZT4KPC9oZWFk Pgo8Ym9keT4KCiAgPGRpdiBjbGFzcz0iaGVhZGluZyI+PGgxPlBhZ2UgVGl0bGU8L2gxPjwvZGl2 PgogIAogIDxkaXYgY2xhc3M9ImRpYWxvZyI+PGRpdiBjbGFzcz0iZGlhbG9nLWNvbnRlbnQiPjxo Mj5UaGlzIGlzIHRoZSB0ZXh0IG9mIGEgZGlhbG9nLjwvaDI+PC9kaXY+PC9kaXY+Cgo8L2JvZHk+ CjwvaHRtbD4K