Page.RenderToBmp(Bitmap bitmap, Matrix mat) create weird bitmap

Hello.
Please forgive my bad English.
When calling Page.RenderToBmp(Bitmap bitmap, Matrix mat), a weird bitmap was created, see attachment "weird_bitmap.jpg".
The origin PDF files is "test.PDF" (page 2), see attachment. This file is actually from your test project.
My java code:

//=============================================
private PDFLayoutView m_view = null;
private Document m_doc = null;
...
private Bitmap getBitmap()
{
int pageNo = m_view.PDFGetCurrPage();

float x = 0;
float y = m_doc.GetPageHeight(pageNo);

Matrix matrix = new Matrix(1, -1, x, y);

int width = (int) m_doc.GetPageWidth(pageNo);
int height = (int) m_doc.GetPageHeight(pageNo);

Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);

m_doc.GetPage(pageNo).RenderToBmp(bitmap, matrix);

matrix.Destroy();

return bitmap;
}
//=============================================

Thank you very m uch.

Hello, any advice for my question?
Thank you very much.

Try following this www.radaeepdf.com/support/knowledge-base?view=kb&kbartid=98