Temporary for issue https://github.com/bergben/ng2-img-tools/issues/7

fixing_for_ng2_img_tool_on_safari_IE.ts

  // helper functions
  private resizeImage(img, maxWidth, maxHeight, callback) {
    return img.onload = () => {
      // get image dimension
      let width = img.width;
      let height = img.height;

      // set width and height to the max values
      if (width > height) {
        if (width > maxWidth) {
          height *= maxWidth / width;
          width = maxWidth;
        }
      } else {
        if (height > maxHeight) {
          width *= maxHeight / height;
          height = maxHeight;
        }
      }

      // create canvas object
      let canvas = document.createElement('canvas');

      // set canvas to the new calculated dimension values
      canvas.width = maxWidth;
      canvas.height = maxHeight;

      // create canvas context 2d and align image to center
      let startX = maxWidth / 2 - width / 2;
      let startY = maxHeight / 2 - height / 2;
      let ctx = canvas.getContext('2d', {alpha: false});

      // draw image to canvas
      ctx.drawImage(img, startX, startY, width, height);

      // convert canvas to image
      let dataUrl = canvas.toDataURL('image/jpeg');

      // run callback with result
      callback(dataUrl);

    };
  }