zh/builder/src/echarts3/visual/seriesColor.js

import Gradient from 'zrender/src/graphic/Gradient';
export default function (ecModel) {
  function encodeColor(seriesModel) {
    var colorAccessPath = (seriesModel.visualColorAccessPath || 'itemStyle.normal.color').split('.');
    var data = seriesModel.getData();
    var color = seriesModel.get(colorAccessPath) // Set in itemStyle
    || seriesModel.getColorFromPalette(seriesModel.get('name')); // Default color
    // FIXME Set color function or use the platte color

    data.setVisual('color', color); // Only visible series has each data be visual encoded

    if (!ecModel.isSeriesFiltered(seriesModel)) {
      if (typeof color === 'function' && !(color instanceof Gradient)) {
        data.each(function (idx) {
          data.setItemVisual(idx, 'color', color(seriesModel.getDataParams(idx)));
        });
      } // itemStyle in each data item


      data.each(function (idx) {
        var itemModel = data.getItemModel(idx);
        var color = itemModel.get(colorAccessPath, true);

        if (color != null) {
          data.setItemVisual(idx, 'color', color);
        }
      });
    }
  }

  ecModel.eachRawSeries(encodeColor);
}