Eraser of PDF Ink

I have another problem with after I added and call vRender again it's disappear.
How can I add bitmap correctly with float[]

like this logic:

I cannot find TransformRect method from radaee Matrix. Can you give me this method ?

this method can be found in new version, and need new librdpdf.so library.
are you used new version?

Ok I got TransformRect from new sdk but I still cannot addAnnotBitmap

This is my code

float[] rect = new float[]{0, 0, getBitmap().getWidth(), getBitmap().getHeight()};
Matrix mat = m_ink_page.CreateInvertMatrix(m_view. vGetX(), m_view.vGetY());
mat.TransformRect(rect);
page.AddAnnotBitmap(m_ink.getBitmap(), true, rect);

Do I have to implement another code after AddAnnotBitmap?

Any update ?

Here I add some code that addAnnotBitmap but it doesn't work at all

Bitmap bmAddnot = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
float[] rect = new float[]{0, 0, bmAddnot.getWidth(), bmAddnot.getHeight()};
PDFView m_view = m_vPDF.PDFgetView();
PDFVPage v_page = m_vPDF.PDFgetView().vGetPage(m_page_no);
Page page = m_doc.GetPage(m_page_no);
Matrix mat = v_page.CreateInvertMatrix(m_view.vGetX(), m_view.vGetY());
mat.TransformRect(rect);
page.AddAnnotBitmap(bmAddnot, true, rect);

but it doesn't show a bitmap after I added it