George Bilalis wrote: > Q: What are the exact parameters saved (- or restored by restoreState()) > by this method?
You probably know this and it's very obvious, but in case you didn't know: saveState doesn't really save anything in your Java program (in any case: nothing essential). The only important thing the methods saveState and restoreState do is writing a 'q' (save) or a 'Q' (restore) to the OutputStream (and some whitespace). This is the 'stupid' answer, in case your question is a 'newbie' question ;-) The actual 'saving/restoring of the graphics state' happens in the PDF viewer. The PDF viewer has to keep track of properties such as the current line width, current fill color, current stroke color, and so on. This is how the PDF Reference describes it (section 4.3.1 p214-215): "A well-structured PDF document typically contains many graphical elements that are essentially independent of each other and sometimes nested to multiple levels. The graphics state stack allows these elements to make local changes to the graphics state without disturbing the graphics state of the surrounding environment. The stack is a LIFO (last in, first out) data structure in which the contents of the graphics state can be saved and later restored using the following operators: * The q operator pushes a copy of the entire graphics state onto the stack. * The Q operator restores the entire graphics state to its former value by popping it from the stack. These operators can be used to encapsulate a graphical element so that it can modify parameters of the graphics state and later restore them to their previous values. Occurrences of the q and Q operators must be balanced within a given content stream (or within the sequence of streams specified in a page dictionary’s Contents array)." The answer to your question "what are the exact parameters" is the "entire graphics state". If you want a list, please read chapter 4 and 5 of the PDF Reference (it's about 300 pages, I can't copy/paste all this in a mail). This is the intelligent answer, probably the one you expected. br, Bruno ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions Buy the iText book: http://itext.ugent.be/itext-in-action/
