Function hsla2rgba

libs/echarts/echarts-en.simple.js:3973–3995

* @param {Array. } hsla * @param {Array. } rgba * @return {Array. } rgba

(hsla, rgba)

 * @return {Array.<number>} rgba
 */
function hsla2rgba(hsla, rgba) {
    var h = (((parseFloat(hsla[0]) % 360) + 360) % 360) / 360;  // 0 .. 1
    // NOTE(deanm): According to the CSS spec s/l should only be
    // percentages, but we don't bother and let float or percentage.
    var s = parseCssFloat(hsla[1]);
    var l = parseCssFloat(hsla[2]);
    var m2 = l <= 0.5 ? l * (s + 1) : l + s - l * s;
    var m1 = l * 2 - m2;

    rgba = rgba || [];
    setRgba(rgba,
        clampCssByte(cssHueToRgb(m1, m2, h + 1 / 3) * 255),
        clampCssByte(cssHueToRgb(m1, m2, h) * 255),
        clampCssByte(cssHueToRgb(m1, m2, h - 1 / 3) * 255),
        1
    );

    if (hsla.length === 4) {
        rgba[3] = hsla[3];
    }

    return rgba;
}

/**
 * @param {string} color