Debenu Quick PDF Library - PDF SDK Community Forum : Set the current transformation matrix http://www.quickpdf.org/forum/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Sat, 04 Apr 2026 23:32:14 +0000 Thu, 19 Dec 2013 13:42:32 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 11.01 360 www.quickpdf.org/forum/RSS_post_feed.asp?TID=2798 <![CDATA[Debenu Quick PDF Library - PDF SDK Community Forum]]> http://www.quickpdf.org/forum/forum_images/QPDF_Forum_Title.png http://www.quickpdf.org/forum/ <![CDATA[Set the current transformation matrix : Tony,The SetContentStreamFromString...]]> http://www.quickpdf.org/forum/set-the-current-transformation-matrix_topic2798_post11400.html#11400 Author: AndrewC
Subject: 2798
Posted: 19 Dec 13 at 1:42PM

Tony,

The SetContentStreamFromString will replace the entire content stream contents so yes the 'q' is needed and the call to SaveState should be removed.  The 'Q' is appended correctly with the QP.LoadState call and should be used to balance out the initial 'q' - savestate operator.

Andrew.
]]> Thu, 19 Dec 2013 13:42:32 +0000 http://www.quickpdf.org/forum/set-the-current-transformation-matrix_topic2798_post11400.html#11400 <![CDATA[Set the current transformation matrix : Thanks for that.I had to repla...]]> http://www.quickpdf.org/forum/set-the-current-transformation-matrix_topic2798_post11399.html#11399 Author: tonyedgecombe
Subject: 2798
Posted: 19 Dec 13 at 1:14PM

Thanks for that.

I had to replace:
QP.SetContentStreamFromString(' 10 0 0 10 141.7323 572.5984 cm ');

with
QP.SetContentStreamFromString(' q 10 0 0 10 141.7323 572.5984 cm ');


The SaveState method wasn't inserting the q operator, I'm not sure if this is because I'm doing something wrong or if it's a bug.

Tony]]> Thu, 19 Dec 2013 13:14:20 +0000 http://www.quickpdf.org/forum/set-the-current-transformation-matrix_topic2798_post11399.html#11399 <![CDATA[Set the current transformation matrix : Basically the Draw functions add...]]> http://www.quickpdf.org/forum/set-the-current-transformation-matrix_topic2798_post11398.html#11398 Author: AndrewC
Subject: 2798
Posted: 18 Dec 13 at 8:57AM

Basically the Draw functions add drawing commands to the end of the currently select contentstream.  You can use feature to create your own content stream, see the transformation matrix and start using it.

The quickest and easiest might be to use the following functions.

QP.NewContentStream

QP.SaveState    // saves the current drawing state including transformation matrix.

QP.SetContentStreamFromString(' 10 0 0 10 141.7323 572.5984 cm ');

.... do your drawing here.  Can use any QPL drawing function but it will be affected by the transformation matrix of cours.

QP.LoadState    // restores to original transformation matrix.


Andrew.
]]> Wed, 18 Dec 2013 08:57:20 +0000 http://www.quickpdf.org/forum/set-the-current-transformation-matrix_topic2798_post11398.html#11398 <![CDATA[Set the current transformation matrix : Is there a way to set the current...]]> http://www.quickpdf.org/forum/set-the-current-transformation-matrix_topic2798_post11397.html#11397 Author: tonyedgecombe
Subject: 2798
Posted: 17 Dec 13 at 12:52PM

Is there a way to set the current transformation matrix so that all subsequent drawing operations are transformed.]]> Tue, 17 Dec 2013 12:52:59 +0000 http://www.quickpdf.org/forum/set-the-current-transformation-matrix_topic2798_post11397.html#11397