Text is rendered by doubling pixels on hi-dpi screen for some fonts |
|||||
Issue descriptionText rendering is much worse in hi-dpi than in lo-dpi. It looks like they're rendered in lo-dpi then doubled pixels. 3 fonts are known to hit this condition: - Yu Gothic - Noto Sans CJK - Myriad Set Pro All these fonts render poorly in lo-dpi too, so we keep issue 545643 and 630917 to track them, but the poorness in hi-dpi is very noticeable. Screenshots are Chrome, Edge, Firefox from left. Reproducing HTML http://output.jsbin.com/heneyo for Yu Gothic/Noto Sans CJK https://webkit.org/status for Myriad Set Pro fmalita@, could you advice me where this belong to? Is this paint or Skia, or something else?
,
Aug 4 2016
+oshima. Checking with a magnifier, I'm guessing that the rasterized content layer is post-filtered - either because of a fractional layer (http://crbug.com/521364) or general positioning/scaling funkiness for DSF != 1. So it's probably CC/paint, not Skia (but bungeman should double-check). Can you try launching with --enable-use-zoom-for-dsf? There's a good chance that http://crbug.com/485650 will solve this. It certainly makes things crisper in Linux, but I don't have a Win box handy to try.
,
Aug 4 2016
,
Aug 4 2016
Which version is it? bsep@ enabled this mode on windows in 53.
,
Aug 8 2016
#4: Which version is it? bsep@ enabled this mode on windows in 53. Canary, can reproduce on 54.0.2802.0
,
Aug 8 2016
#2: --enable-use-zoom-for-dsf doesn't seem to change the result.
,
Aug 8 2016
Oh, wait, 54.0.2823.0 changed something dramatically. This issue is gone, now these fonts look as hi-res as Edge, though everything is lighter, including border and 'Courier New' (fonts in this page) only in Hi-DPI.
,
Aug 9 2016
Verified other cases too and hi-dpi double-pixel problem was resolved. Tried some but can't find which CL fixed this, mark as fixed anyway. |
|||||
►
Sign in to add a comment |
|||||
Comment 1 by kojii@chromium.org
, Aug 2 201690.8 KB
90.8 KB View Download
97.2 KB
97.2 KB View Download
13.0 KB
13.0 KB View Download