AddAnnotationBitmap to page

com.radaee.pdf.Page page = page();

float[] rect = new float[4];
rect[0] = 0; rect[1] = 0;
rect[2] = mAnnotationSurface.surfaceWidth();
rect[3] = mAnnotationSurface.surfaceHeight();
page.ObjsStart();

Bitmap map = mAnnotationSurface.surfaceBitmap();

if(page.AddAnnotBitmap(map, false, rect)) {

page.Close();
mPDF.PDFSave();
}

Using this code the bitmap will not show on the pdf, is there something I am doing wrong?

I managed to make it work, however, the image is too big and does not display properly, but the bitmap is the same size as the screen. Might be something wrong with the rect, but I cant figure it out.

Changing the rect code to this

float[] rect = new float[4];
rect[0] = mPDFDocument.GetPageWidth(0);
rect[1] = 0;
rect[2] = 0;

rect[3] = mPDFDocument.GetPageHeight(0);

fixed the visibility issues, though the colors are darker than they should be. Any ideas to fix this?

like these codes:
PDFPos pos = m_view.vGetPos((int)rects[0], (int)rects[1]);//where rect is in screen coordinate.
PDFVPage vpage = m_view.vGetPage(pos.pageno);
Matrix mat = vpage.CreateInvertMatrix(m_view.vGetX(), m_view.vGetY());
mat.TransformRect(rect);
Page page = vpage.GetPage();
page.AddAnnotBitmap(bitmap, has_alpha, rect);
mat.Destroy();

What view class has the v functions (vGetPos, vGetX)?

these codes can be works in PDFReader class, which has m_view member.