The CairoContent class

(No version information available, might only be in SVN)

简介

CairoContent is used to describe the content that a surface will contain, whether color information, alpha information (translucence vs. opacity), or both.

Note: The large values here are designed to keep CairoContent values distinct from CairoContent values so that the implementation can detect the error if users confuse the two types.

类摘要

CairoContent {

/* 常量 */

const integer COLOR = 4096 ;

const integer ALPHA = 8192 ;

const integer COLOR_ALPHA = 12288 ;

}

预定义常量

CairoContent::COLOR: The surface will hold color content only.
CairoContent::ALPHA: The surface will hold alpha content only.
CairoContent::COLOR_ALPHA: The surface will hold color and alpha content.