utilities getImageLegacy.ts

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  import { StackViewport, Types } from '..';
import getEnabledElement from '../getEnabledElement';
 
/**
 * Gets the IImage rendered by the given element. This is provided as a
 * convenience for the legacy cornerstone getImage function. However it is
 * encouraged for IStackViewport.getImage to be used instead.
 * @param element - the element rendering/containing the image
 * @returns the image
 */
function getImageLegacy(element: HTMLDivElement): Types.IImage | undefined {
  const enabledElement = getEnabledElement(element);
 
  if (!enabledElement) {
    return;
  }
 
  const { viewport } = enabledElement;
 
  if (!(viewport instanceof StackViewport)) {
    throw new Error(
      `An image can only be fetched for a stack viewport and not for a viewport of type: ${viewport.type}`
    );
  }
 
  return viewport.getCornerstoneImage();
}
 
export default getImageLegacy;