In PDFBox, how to change the origin (0,0) point of a PDRectangle object?

Question

The Situation:
In PDFBox, PDRectangle objects\' default origin (0,0) seems to be the lower-left corner of a page.

For example, the following code gives

Answer 1

The following seems to be the best way to "adjust" the TextPosition coordinates:

x_adjusted =  x_original + page.findCropBox().getLowerLeftX();
y_adjusted = -y_original + page.findCropBox().getUpperRightY();

where page is the PDPage on which the TextPosition object is located