The CairoAntialias class
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Enum class that specifies the type of antialiasing to do when rendering text or shapes.
Use the default antialiasing for the subsystem and target device
Use a bilevel alpha mask
Perform single-color antialiasing (using shades of gray for black text on a white background, for example).
Perform antialiasing by taking advantage of the order of subpixel elements on devices such as LCD panels.