The CairoAntialias class - PHP中文帮助手册

简介

Enum class that specifies the type of antialiasing to do when rendering text or shapes.

CairoAntialias {

/* 常量 */

const integer MODE_DEFAULT = 0 ;

const integer MODE_NONE = 1 ;

const integer MODE_GRAY = 2 ;

const integer MODE_SUBPIXEL = 3 ;

}

CairoAntialias::MODE_DEFAULT: Use the default antialiasing for the subsystem and target device
CairoAntialias::MODE_NONE: Use a bilevel alpha mask
CairoAntialias::MODE_GRAY: Perform single-color antialiasing (using shades of gray for black text on a white background, for example).
CairoAntialias::MODE_SUBPIXEL: Perform antialiasing by taking advantage of the order of subpixel elements on devices such as LCD panels.