*antialiasing*

This variable has an effect only on the Windows platform.

When this variable is true, drawing and filling functions such as draw-line, draw-ellipse, and fill-polygon will draw straight and curved lines and edges using antialiasing. And draw-string-in-box will draw antialiased text.

This technique produces smoother-looking lines and edges by using a variety of colors for edge pixels to interpolate between the foreground and background colors.

The default value is nil. Typically you would bind this variable to true around a block of drawing code where antialiasing is desired. Or this variable could simply be set to true if the effect is desired everywhere.

Caveats: Antialiased drawing is generally somewhat slower than otherwise, though not by a lot with a decent video adapter. Antialiased text looks fuzzier than non-antialiased, though is perhaps easier on the eyes. Antialiasing appears to have no effect on non-TrueType fonts.

You can't feasibly bind this variable around the drawing of widgets, which draw themselves asynchronously, so some widgets that are drawn by Lisp provide the antialias-lines and antialias-text properties for this.

See *color-gradient-filling* and *alpha-blending* for other appearance-enhancing effects.

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This page has had moderate revisions compared to the 9.0 page.
Created 2019.8.20.