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by keville
583 days ago
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Apple II (1977) did an early version of this; it essentially had purple and green addressable colors in each pixel. With both on in a single pixel you got white text, but could also leverage two adjacent pixels, one with purple and one with green, to produce a half-pixel offset that could produce a smoother diagonal line than typical fixed coordinates. https://en.wikipedia.org/wiki/Subpixel_rendering |
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