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    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.

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