PDFRegionDecoder.java 文件源码

/**
 * Initializes the region decoder. This method initializes
 * @param context not used here
 * @param uri not used here (file is already loaded)
 * @return the rescaled point
 * @throws Exception
 */
@Override public Point init(Context context, Uri uri) throws Exception {

  this.descriptor = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
  this.renderer = new PdfRenderer(descriptor);
  page = renderer.openPage(position);

  return new Point((int) ((page.getWidth() * scale + 0.5f)),
      (int) ((page.getHeight() * scale + 0.5f)));
}