import { transSketchColor } from '../../common/utils'
import { SKLayer, Background } from '../../types'

export default (layer:SKLayer):Background => {
    let {
        alpha,
        red,
        green,
        blue
    } = layer.backgroundColor||{};
    // 如果设置了 Opacity 属性，则 fills border 需要乘以这个数值
    if (layer.style?.contextSettings) {
        alpha = layer.style.contextSettings.opacity * alpha;
    }
    if (alpha > 0) {
        return {
            color: transSketchColor({red, green, blue, alpha}),
        }
    }
    return {}
}