The rectangle is defined by two opposite corners:
(x1, y1). The coordinates are in PDF
pdfExtractTextFromRect2 returns a string if successful, or
NULL if text extraction is prohibited by this PDF file.
The string is returned, and
*length is filled in with the
string length. The string will be zero-terminated, but it may contain
zero bytes, depending on the current text encoding (see
pdfSetTextEncoding). The caller is responsible for freeing the
string with the
This function is identical to
pdfExtractTextFromRect except that
it takes points in PDF coordinate space.
See the "Setting parameters" section in the function list for settings that affect text extraction.