Digital Signatures

public void renderPage(int index) {
  PDFDoc doc = Common.loadPDFDoc(mContext, mPath, null);
  String outputFilePath = "test.jpg";
  PDFPage pdfPage = Common.loadPage(mContext, doc,
    index, PDFPage.e_ParsePageNormal);

  // Create the bitmap and erase its background.
  Bitmap bitmap = Bitmap.createBitmap((int)pdfPage.getWidth(),
    (int)pdfPage.getHeight(), Bitmap.Config.ARGB_8888);
  bitmap.eraseColor(Color.WHITE);

  Matrix2D matrix = pdfPage.getDisplayMatrix(0, 0,
    (int)pdfPage.getWidth(), (int)pdfPage.getHeight(),
    Constants.e_Rotation0);

    Renderer renderer = new Renderer(bitmap, true);

    // Render the page to bitmap.
    Progressive progressive = renderer.startRender(pdfPage, matrix,
      null);
    int state = Progressive.e_ToBeContinued;
    while (state == Progressive.e_ToBeContinued) {
        state = progressive.resume();
    }
    progressive.delete();
    if (state == Progressive.e_Error) {
      // Error
      return;
    }

    // Save the render result to the jpeg image
    if (false == Common.SaveImageFile(bitmap,
      Bitmap.CompressFormat.JPEG, outputFilePath)) {
        // Failed to save
        return;
      }

    renderer.delete();
    pdfPage.delete();
    Common.releaseDoc(mContext, doc);
  }
}