use a per-dviRender-instance painter instead of a global (!) one, so different documents can be painted safely at the same time

BUG: 200409

svn path=/branches/KDE/4.3/kdegraphics/okular/; revision=1002248

generators/dvi/dviRenderer.cpp

@@ -43,7 +43,6 @@
 
 //#define DEBUG_DVIRENDERER
 
-QPainter *foreGroundPainter; // QPainter used for text
 
 
 //------ now comes the dviRenderer class implementation ----------
@@ -66,7 +65,8 @@ dviRenderer::dviRenderer()
     penWidth_in_mInch(0),
     number_of_elements_in_path(0),
     currentlyDrawnPage(0),
-    m_eventLoop(0)
+    m_eventLoop(0),
+    foreGroundPainter(0)
 {
 #ifdef DEBUG_DVIRENDERER
   //kDebug(kvs::dvi) << "dviRenderer( parent=" << par << " )";

generators/dvi/dviRenderer.h

@@ -341,6 +341,8 @@ private:
   QWidget* parentWidget;
 
   QEventLoop* m_eventLoop;
+
+  QPainter* foreGroundPainter;
 };
 
 #endif

generators/dvi/dviRenderer_draw.cpp

@@ -69,7 +69,6 @@
 
 #include <QPainter>
 
-extern QPainter *foreGroundPainter;
 
 
 /** Routine to print characters.  */

generators/dvi/special.cpp

@@ -25,7 +25,6 @@
 
 //#define DEBUG_SPECIAL
 
-extern QPainter *foreGroundPainter;
 
 
 void dviRenderer::printErrorMsgForSpecials(const QString& msg)