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> Antialiasing: Applying a light shade around the glyph. It is useful at small scale, when you don’t have enough pixels, but it makes the glyph look bolder.

No, poor antialiasing makes the glyph look bolder. Specifically, drawing the antialiased text without taking into account screen gamma causes that.

edit Noticed this also:

> lcddefault is color-balanced and normalized

You’d expect it to be, but not everywhere. The filter sum is ~1.4 or so with many libraries. This is to offset the gamma problem I mentioned above. I think skia’s renderer now actually does have sub-pixel gamma correction, and is properly normalized.

And Mac's (subpixel only?) antialiasing algorithm thickens text beyond its true borders. There may be a way to disable this globally though.

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