The CairoContent class

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

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.