Got it. Thanks a lot:) 2012/2/16 Andreas Lehmkuehler <[email protected]>
> Hi, > > Am 15.02.2012 16:36, schrieb Tate, Hongliang Tian(田洪亮): > > Hi, >> >> Why are the heights of some TextPosition objects generated from >> PDFStreamEngine is 0? In another words, I found that >> TextPosition.getHeight() >> returns 0. >> >> What I am trying to do is to extract text and their positions and >> sizes from >> PDF. So I need to know the height of TextPosition object. To repeat the >> problem, you can check out the attached PDF. All heights of TextPosition >> objects >> that represent the title string "Accelerating SQL Database Operations on >> a GPU >> with CUDA" are 0. After examining the debug information, I found >> PDFont.getFontHeight(byte[] c, int offset, int length) returned 0 for >> those >> TextPosition objects, which is why the height of TextPosition is 0. >> >> So why does the TextPosition.getHeight() and PDFont.getFontHeight() >> return >> 0? Is there a way to work around? >> > Missing height values are a know issue. There are some improvements in the > current trunk, see PDFBOX-611 [1] for details. But there are still some > cases > left where those values are still missing. > > Thanks ahead. >> > > > BR > Andreas Lehmkühler > > [1] > https://issues.apache.org/**jira/browse/PDFBOX-611<https://issues.apache.org/jira/browse/PDFBOX-611> >
