Method setColorToCanvas

src/openlayers/core/StyleUtils.js:1134–1146

* @function StyleUtils.setColorToCanvas 将颜色，透明度等样式设置到canvas上 * @param {Object} canvas - 渲染的canvas对象 * @param {Object} parameters - 样式参数 * @returns {Object} style对象

(canvas, parameters)

   * @returns {Object} style对象
   */
  static setColorToCanvas(canvas, parameters) {
    let context = canvas.getContext('2d');
    let fillColor = StyleUtils.hexToRgb(parameters.fillColor);
    fillColor && fillColor.push(parameters.fillOpacity);
    let strokeColor = StyleUtils.hexToRgb(parameters.strokeColor);
    strokeColor && strokeColor.push(parameters.strokeOpacity);
    context.fillStyle = StyleUtils.formatRGB(fillColor);
    context.fill();
    context.strokeStyle = StyleUtils.formatRGB(strokeColor);
    context.lineWidth = parameters.strokeWidth;
    context.stroke();
    return canvas;
  }
  /**
   * @function StyleUtils.getImageStyle 获取图片样式
   * @param {Object} styleParams - 样式参数