added psgs.h which I had forgotten

svn path=/trunk/kdegraphics/kdvi/; revision=54196

psgs.h

@@ -0,0 +1,63 @@
+#include <qstring.h>
+#include <qintdict.h>
+#include <qintcache.h>
+#include <qpixmap.h>
+#include <ktempfile.h>
+
+
+class pageInfo
+{
+public:
+  pageInfo(QString PS);
+
+  QString   *PostScriptString;
+  KTempFile *Gfx;
+};
+
+
+// Maximal number of PostScript-Pages which are held in memory (or on
+// the disk) for speedup. This should later be made dynamic, maybe
+// with the possibility of switching on/off.
+#define PAGES_IN_MEMORY_CACHE  13
+#define PAGES_IN_DISK_CACHE   101
+
+
+class ghostscript_interface 
+{
+
+
+
+public:
+  ghostscript_interface(double dpi, int pxlw, int pxlh);
+  ~ghostscript_interface();
+
+  void setSize(double dpi, int pxlw, int pxlh);
+
+  void clear();
+
+  // 
+  void setPostScript(int page, QString PostScript);
+
+  // Returns the graphics of the page, if possible. The functions
+  // returns a pointer to a QPixmap, or null. The referred QPixmap
+  // should be deleted after use.
+  QPixmap  *graphics(int page);
+
+  QString  *PostScriptHeaderString;
+
+private:
+  void                  gs_generate_graphics_file(int page, QString filename);
+  QIntDict<pageInfo>  *pageList;
+
+  // Chache to store pages which contain PostScript and are therefore
+  // slow to render.
+  QIntCache<QPixmap>   *MemoryCache;
+
+  // Chache to store pages which contain PostScript and are therefore
+  // slow to render.
+  QIntCache<KTempFile> *DiskCache;
+
+  double                resolution;    // in dots per inch
+  int                   pixel_page_w; // in pixels
+  int                   pixel_page_h; // in pixels
+};