Function createSymbol

src/util/symbol.ts:333–388

(
    symbolType: string,
    x: number,
    y: number,
    w: number,
    h: number,
    color?: ZRColor,
    // whether to keep the ratio of w/h,
    keepAspect?: boolean
)

 * Create a symbol element with given symbol configuration: shape, x, y, width, height, color
 */
export function createSymbol(
    symbolType: string,
    x: number,
    y: number,
    w: number,
    h: number,
    color?: ZRColor,
    // whether to keep the ratio of w/h,
    keepAspect?: boolean
) {
    // TODO Support image object, DynamicImage.

    const isEmpty = symbolType.indexOf('empty') === 0;
    if (isEmpty) {
        symbolType = symbolType.substr(5, 1).toLowerCase() + symbolType.substr(6);
    }
    let symbolPath: ECSymbol | graphic.Image;

    if (symbolType.indexOf('image://') === 0) {
        symbolPath = graphic.makeImage(
            symbolType.slice(8),
            new BoundingRect(x, y, w, h),
            keepAspect ? 'center' : 'cover'
        );
    }
    else if (symbolType.indexOf('path://') === 0) {
        symbolPath = graphic.makePath(
            symbolType.slice(7),
            {},
            new BoundingRect(x, y, w, h),
            keepAspect ? 'center' : 'cover'
        ) as unknown as ECSymbol;
    }
    else {
        symbolPath = new SymbolClz({
            shape: {
                symbolType: symbolType,
                x: x,
                y: y,
                width: w,
                height: h
            }
        }) as unknown as ECSymbol;
    }

    (symbolPath as ECSymbol).__isEmptyBrush = isEmpty;

    // TODO Should deprecate setColor
    (symbolPath as ECSymbol).setColor = symbolPathSetColor;

    if (color) {
        (symbolPath as ECSymbol).setColor(color);
    }

    return symbolPath as ECSymbol;
}

export function normalizeSymbolSize(symbolSize: number | number[]): [number, number] {