Function _imageCover

src/image/loading_displaying.js:758–778

* @private * @param {(LEFT|RIGHT|CENTER)} xAlign either LEFT, RIGHT or CENTER * @param {(TOP|BOTTOM|CENTER)} yAlign either TOP, BOTTOM or CENTER * @param {Number} dw * @param {Number} dh * @param {Number} sx * @param {Number} sy * @param {Number} sw * @param {Number} sh *

(xAlign, yAlign, dw, dh, sx, sy, sw, sh)

   * @returns {Object}
   */
  function _imageCover(xAlign, yAlign, dw, dh, sx, sy, sw, sh) {
    const r = Math.max(dw / sw, dh / sh);
    const [adjusted_sw, adjusted_sh] = [dw / r, dh / r];

    let x = sx;
    let y = sy;

    if (xAlign === constants.CENTER) {
      x += (sw - adjusted_sw) / 2;
    } else if (xAlign === constants.RIGHT) {
      x += sw - adjusted_sw;
    }

    if (yAlign === constants.CENTER) {
      y += (sh - adjusted_sh) / 2;
    } else if (yAlign === constants.BOTTOM) {
      y += sh - adjusted_sh;
    }

    return { x, y, w: adjusted_sw, h: adjusted_sh };
  }

  /**
   * @private