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I've noticed that with some fonts show some fringing (that is coloured usually red/bluey lines) surrounding the text. Here's one example.
A portion of my job is design and I'm finding it very hard to use native tools when the system can't antialias some fonts. It's also double-ugly for me. Anybody else experiencing this? Found a fix? I'm using subpixel smoothing, full hinting and the RGB subpixel order. |
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Coloured fringes are the result of sub-pixel AA. You should check if you use the correct subpixel AA for your display (orientation & order of colours) as using the wrong type will make it really bad. Or you could just disable it (as I do). ;) I did have a closer look at your image, and it seems like it uses two subpixels at both sides of all vertical lines, which maybe explains why it's more visible (usually at most 1 subpixel is used, I think). It's very well possible that the hinting in open fonts prevents this, or that somehow there are fontconfig rules to prevent this for open fonts (you might be able to create a fontconfig rule that disables subpixel AA for the fonts that have these heavy colour fringes). Or maybe this is a bug in the subpixel algorithm that gets triggered only by some fonts. In any case, I'm probably a bad judge of how common it is for this to happen, because I see coloured fringes on all fonts when I enable subpixel AA, so I always disable it. |
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