Add support for using the auxiliary axis in DXF as well.

Index: kicad.bzr/include/wxBasePcbFrame.h
===================================================================
--- kicad.bzr.orig/include/wxBasePcbFrame.h	2011-03-14 11:35:38.000000000 -0300
+++ kicad.bzr/include/wxBasePcbFrame.h	2011-03-14 11:35:42.000000000 -0300
@@ -337,6 +337,7 @@
                         GRTraceMode     trace_mode );
     bool     Genere_DXF( const wxString& FullFileName,
                          int             Layer,
+                         bool            PlotOriginIsAuxAxis,
                          GRTraceMode     trace_mode );
     void     Plot_Layer( PLOTTER*    plotter,
                          int         Layer,
Index: kicad.bzr/pcbnew/pcbplot.cpp
===================================================================
--- kicad.bzr.orig/pcbnew/pcbplot.cpp	2011-03-14 11:35:38.000000000 -0300
+++ kicad.bzr/pcbnew/pcbplot.cpp	2011-03-14 11:35:42.000000000 -0300
@@ -681,7 +681,7 @@
                 break;
 
             case PLOT_FORMAT_DXF:
-                success = m_Parent->Genere_DXF( fn.GetFullPath(), layer,
+                success = m_Parent->Genere_DXF( fn.GetFullPath(), layer, false,
                                                 g_pcb_plot_options.Trace_Mode );
                 break;
             }
Index: kicad.bzr/pcbnew/plotdxf.cpp
===================================================================
--- kicad.bzr.orig/pcbnew/plotdxf.cpp	2011-03-14 11:35:38.000000000 -0300
+++ kicad.bzr/pcbnew/plotdxf.cpp	2011-03-14 12:04:20.000000000 -0300
@@ -13,9 +13,11 @@
 #include "protos.h"
 
 bool WinEDA_BasePcbFrame::Genere_DXF( const wxString& FullFileName, int Layer,
+				      bool PlotOriginIsAuxAxis,
                                       GRTraceMode trace_mode )
 {
     Ki_PageDescr* currentsheet = GetScreen()->m_CurrentSheetDesc;
+    wxPoint offset;
 
     FILE* output_file = wxFopen( FullFileName, wxT( "wt" ) );
     if( output_file == NULL )
@@ -25,9 +27,23 @@
 
     SetLocaleTo_C_standard();
 
+    if( PlotOriginIsAuxAxis ) {
+	/*
+	 * We undo the y offset applied in common/class_plotter.cpp, methods
+	 * set_paper_size and user_to_device_coordinates
+	 */
+        offset.x = m_Auxiliary_Axis_Position.x;
+        offset.y = m_Auxiliary_Axis_Position.y - currentsheet->m_Size.y * 10;
+    }
+    else
+    {
+        offset.x = 0;
+        offset.y = 0;
+    }
+
     DXF_PLOTTER* plotter = new DXF_PLOTTER();
     plotter->set_paper_size( currentsheet );
-    plotter->set_viewport( wxPoint( 0, 0 ), 1, 0 );
+    plotter->set_viewport( offset, 1, 0 );
     plotter->set_creator( wxT( "PCBNEW-DXF" ) );
     plotter->set_filename( FullFileName );
     plotter->start_plot( output_file );
Index: kicad.bzr/pcbnew/pcbnew_scripted.cpp
===================================================================
--- kicad.bzr.orig/pcbnew/pcbnew_scripted.cpp	2011-03-14 11:35:42.000000000 -0300
+++ kicad.bzr/pcbnew/pcbnew_scripted.cpp	2011-03-14 11:44:25.000000000 -0300
@@ -372,6 +372,7 @@
 
             case PLOT_FORMAT_DXF:
                 success = frame->Genere_DXF( fn.GetFullPath(), layer_i,
+                                             false /* PlotOriginIsAuxAxis */,
                                              FILLED /* trace_mode */ );
                 break;
             }