dragonbones-runtime/.cache/egret-core-5.1.0/src/egret/display/BlendMode.ts

the tools to build dragonbones file for diffrent framework

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namespace egret {

    //混合模式在Web端只有部分被支持，在 Native 中全部都支持。
    //目前所有平台的浏览器都支持的有：Layer,Alpha,Normal,Add,ERASE。
    //IOS中的所有浏览器以及Android内的部分浏览器还支持：Multiply,Screen,Lighten,Darken,Difference,Overlay,HardLight。
    //仅在 Native 端支持的有：Subtract,Invert。


    /**
     * A class that provides constant values for visual blend mode effects. These constants are used in the blendMode
     * property of the DisplayObject class.
     * @see egret.DisplayObject#blendMode
     * @version Egret 2.4
     * @platform Web,Native
     * @includeExample egret/display/BlendMode.ts
     * @see http://edn.egret.com/cn/docs/page/108 显示容器的概念与实现
     * @language en_US
     */
    /**
     * 提供混合模式可视效果的常量值的类,通常用于 DisplayObject 的 blendMode 属性上。
     * @see egret.DisplayObject#blendMode
     * @version Egret 2.4
     * @platform Web,Native
     * @includeExample egret/display/BlendMode.ts
     * @see http://edn.egret.com/cn/docs/page/108 显示容器的概念与实现
     * @language zh_CN
     */
    export class BlendMode {
        /**
         * The display object appears in front of the background. Pixel values of the display object override the pixel
         * values of the background. Where the display object is transparent, the background is visible.
         * @version Egret 2.4
         * @platform Web,Native
         * @language en_US
         */
        /**
         * 该显示对象出现在背景前面。显示对象的像素值会覆盖背景的像素值。在显示对象为透明的区域，背景是可见的。
         * @version Egret 2.4
         * @platform Web,Native
         * @language zh_CN
         */
        public static NORMAL:string = "normal";
        /**
         * Adds the values of the constituent colors of the display object to the colors of its background, applying a
         * ceiling of 0xFF. This setting is commonly used for animating a lightening dissolve between two objects.<br/>
         * For example, if the display object has a pixel with an RGB value of 0xAAA633, and the background pixel has an
         * RGB value of 0xDD2200, the resulting RGB value for the displayed pixel is 0xFFC833 (because 0xAA + 0xDD > 0xFF,
         * 0xA6 + 0x22 = 0xC8, and 0x33 + 0x00 = 0x33).
         * @version Egret 2.4
         * @platform Web,Native
         * @language en_US
         */
        /**
         * 将显示对象的原色值添加到它的背景颜色中，上限值为 0xFF。此设置通常用于使两个对象间的加亮溶解产生动画效果。<br/>
         * 例如，如果显示对象的某个像素的 RGB 值为 0xAAA633，背景像素的 RGB 值为 0xDD2200，则显示像素的结果 RGB 值为 0xFFC833
         * （因为 0xAA + 0xDD > 0xFF，0xA6 + 0x22 = 0xC8，且 0x33 + 0x00 = 0x33）。
         * @version Egret 2.4
         * @platform Web,Native
         * @language zh_CN
         */
        public static ADD:string = "add";
        /**
         * Erases the background based on the alpha value of the display object.
         * @version Egret 2.4
         * @platform Web,Native
         * @language en_US
         */
        /**
         * 根据显示对象的 Alpha 值擦除背景。Alpha 值不为0的区域将被擦除。
         * @version Egret 2.4
         * @platform Web,Native
         * @language zh_CN
         */
        public static ERASE:string = "erase";

    }
}

namespace egret.sys {

    let blendModeString = ["normal", "add", "erase"];
    let blendModeNumber = {};
    let length = blendModeString.length;
    for (let i = 0; i < length; i++) {
        let str = blendModeString[i];
        blendModeNumber[str] = i;
    }

    /**
     * @private
     * 转换 blendMode 字符串为数字。
     */
    export function blendModeToNumber(blendMode:string):number {
        let num = blendModeNumber[blendMode];
        return num === undefined ? 0 : num;
    }

    /**
     * @private
     * 转换数字为 blendMode 字符串。
     */
    export function numberToBlendMode(blendMode:number):string {
        let str = blendModeString[blendMode];
        return str === undefined ? "normal" : str;
    }

}