vega-scenegraph/src/util/canvas/clip.js

Vega scenegraph and renderers.

import {hasCornerRadius, rectangle} from '../../path/shapes';
import {isFunction} from 'vega-util';

export default function(context, scene) {
  var clip = scene.clip;

  context.save();

  if (isFunction(clip)) {
    context.beginPath();
    clip(context);
    context.clip();
  } else {
    clipGroup(context, scene.group);
  }
}

export function clipGroup(context, group) {
  context.beginPath();
  hasCornerRadius(group)
    ? rectangle(context, group, 0, 0)
    : context.rect(0, 0, group.width || 0, group.height || 0);
  context.clip();
}