Merge pull request #4 from FOSSEE/develop

merging dev into master

1 files changed, 815 insertions, 0 deletions

diff --git a/common/common_plotDXF_functions.cpp b/common/common_plotDXF_functions.cpp
new file mode 100644
index 0000000..5544ab1
--- /dev/null
+++ b/common/common_plotDXF_functions.cpp
@@ -0,0 +1,815 @@
+/**
+ * @file common_plotDXF_functions.cpp
+ * @brief KiCad: Common plot DXF Routines.
+ */
+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2015 KiCad Developers, see CHANGELOG.TXT for contributors.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+#include <fctsys.h>
+#include <gr_basic.h>
+#include <trigo.h>
+#include <wxstruct.h>
+#include <base_struct.h>
+#include <plot_common.h>
+#include <macros.h>
+#include <kicad_string.h>
+#include <convert_basic_shapes_to_polygon.h>
+
+/**
+ * Oblique angle for DXF native text
+ * (I don't remember if 15 degrees is the ISO value... it looks nice anyway)
+ */
+static const double DXF_OBLIQUE_ANGLE = 15;
+
+/**
+ * Set the scale/position for the DXF plot
+ * The DXF engine doesn't support line widths and mirroring. The output
+ * coordinate system is in the first quadrant (in mm)
+ */
+void DXF_PLOTTER::SetViewport( const wxPoint& aOffset, double aIusPerDecimil,
+                               double aScale, bool aMirror )
+{
+    plotOffset  = aOffset;
+    plotScale   = aScale;
+
+    /* DXF paper is 'virtual' so there is no need of a paper size.
+       Also this way we can handle the aux origin which can be useful
+       (for example when aligning to a mechanical drawing) */
+    paperSize.x = 0;
+    paperSize.y = 0;
+
+    /* Like paper size DXF units are abstract too. Anyway there is a
+     * system variable (MEASUREMENT) which will be set to 1 to indicate
+     * metric units */
+    m_IUsPerDecimil = aIusPerDecimil;
+    iuPerDeviceUnit = 1.0 / aIusPerDecimil; // Gives a DXF in decimils
+    iuPerDeviceUnit *= 0.00254;             // ... now in mm
+
+    SetDefaultLineWidth( 0 );               // No line width on DXF
+    m_plotMirror = false;                     // No mirroring on DXF
+    m_currentColor = BLACK;
+}
+
+/**
+ * Opens the DXF plot with a skeleton header
+ */
+bool DXF_PLOTTER::StartPlot()
+{
+    wxASSERT( outputFile );
+
+    // DXF HEADER - Boilerplate
+    // Defines the minimum for drawing i.e. the angle system and the
+    // continuous linetype
+    fputs( "  0\n"
+           "SECTION\n"
+           "  2\n"
+           "HEADER\n"
+           "  9\n"
+           "$ANGBASE\n"
+           "  50\n"
+           "0.0\n"
+           "  9\n"
+           "$ANGDIR\n"
+           "  70\n"
+           "  1\n"
+           "  9\n"
+           "$MEASUREMENT\n"
+           "  70\n"
+           "0\n"
+           "  0\n"              // This means 'metric units'
+           "ENDSEC\n"
+           "  0\n"
+           "SECTION\n"
+           "  2\n"
+           "TABLES\n"
+           "  0\n"
+           "TABLE\n"
+           "  2\n"
+           "LTYPE\n"
+           "  70\n"
+           "1\n"
+           "  0\n"
+           "LTYPE\n"
+           "  2\n"
+           "CONTINUOUS\n"
+           "  70\n"
+           "0\n"
+           "  3\n"
+           "Solid line\n"
+           "  72\n"
+           "65\n"
+           "  73\n"
+           "0\n"
+           "  40\n"
+           "0.0\n"
+           "  0\n"
+           "ENDTAB\n",
+            outputFile );
+
+    // Text styles table
+    // Defines 4 text styles, one for each bold/italic combination
+    fputs( "  0\n"
+           "TABLE\n"
+           "  2\n"
+           "STYLE\n"
+           "  70\n"
+           "4\n", outputFile );
+
+    static const char *style_name[4] = {"KICAD", "KICADB", "KICADI", "KICADBI"};
+    for(int i = 0; i < 4; i++ )
+    {
+        fprintf( outputFile,
+                 "  0\n"
+                 "STYLE\n"
+                 "  2\n"
+                 "%s\n"         // Style name
+                 "  70\n"
+                 "0\n"          // Standard flags
+                 "  40\n"
+                 "0\n"          // Non-fixed height text
+                 "  41\n"
+                 "1\n"          // Width factor (base)
+                 "  42\n"
+                 "1\n"          // Last height (mandatory)
+                 "  50\n"
+                 "%g\n"         // Oblique angle
+                 "  71\n"
+                 "0\n"          // Generation flags (default)
+                 "  3\n"
+                 // The standard ISO font (when kicad is build with it
+                 // the dxf text in acad matches *perfectly*)
+                 "isocp.shx\n", // Font name (when not bigfont)
+                 // Apply a 15 degree angle to italic text
+                 style_name[i], i < 2 ? 0 : DXF_OBLIQUE_ANGLE );
+    }
+
+
+    // Layer table - one layer per color
+    fprintf( outputFile,
+             "  0\n"
+             "ENDTAB\n"
+             "  0\n"
+             "TABLE\n"
+             "  2\n"
+             "LAYER\n"
+             "  70\n"
+             "%d\n", NBCOLORS );
+
+    /* The layer/colors palette. The acad/DXF palette is divided in 3 zones:
+
+       - The primary colors (1 - 9)
+       - An HSV zone (10-250, 5 values x 2 saturations x 10 hues
+       - Greys (251 - 255)
+
+       There is *no* black... the white does it on paper, usually, and
+       anyway it depends on the plotter configuration, since DXF colors
+       are meant to be logical only (they represent *both* line color and
+       width); later version with plot styles only complicate the matter!
+
+       As usual, brown and magenta/purple are difficult to place since
+       they are actually variations of other colors.
+     */
+    static const struct {
+        const char *name;
+        int color;
+    } dxf_layer[NBCOLORS] = {
+        { "BLACK",      7 },    // In DXF, color 7 is *both* white and black!
+        { "GRAY1",      251 },
+        { "GRAY2",      8 },
+        { "GRAY3",      9 },
+        { "WHITE",      7 },
+        { "LYELLOW",    51 },
+        { "BLUE1",      178 },
+        { "GREEN1",     98 },
+        { "CYAN1",      138 },
+        { "RED1",       18 },
+        { "MAGENTA1",   228 },
+        { "BROWN1",     58 },
+        { "BLUE2",      5 },
+        { "GREEN2",     3 },
+        { "CYAN2",      4 },
+        { "RED2",       1 },
+        { "MAGENTA2",   6 },
+        { "BROWN2",     54 },
+        { "BLUE3",      171 },
+        { "GREEN3",     91 },
+        { "CYAN3",      131 },
+        { "RED3",       11 },
+        { "MAGENTA3",   221 },
+        { "YELLOW3",    2 },
+        { "BLUE4",      5 },
+        { "GREEN4",     3 },
+        { "CYAN4",      4 },
+        { "RED4",       1 },
+        { "MAGENTA4",   6 },
+        { "YELLOW4",    2 }
+    };
+
+    for( EDA_COLOR_T i = BLACK; i < NBCOLORS; i = NextColor(i) )
+    {
+        fprintf( outputFile,
+                 "  0\n"
+                 "LAYER\n"
+                 "  2\n"
+                 "%s\n"         // Layer name
+                 "  70\n"
+                 "0\n"          // Standard flags
+                 "  62\n"
+                 "%d\n"         // Color number
+                 "  6\n"
+                 "CONTINUOUS\n",// Linetype name
+                 dxf_layer[i].name, dxf_layer[i].color );
+    }
+
+    // End of layer table, begin entities
+    fputs( "  0\n"
+           "ENDTAB\n"
+           "  0\n"
+           "ENDSEC\n"
+           "  0\n"
+           "SECTION\n"
+           "  2\n"
+           "ENTITIES\n", outputFile );
+
+    return true;
+}
+
+
+bool DXF_PLOTTER::EndPlot()
+{
+    wxASSERT( outputFile );
+
+    // DXF FOOTER
+    fputs( "  0\n"
+           "ENDSEC\n"
+           "  0\n"
+           "EOF\n", outputFile );
+    fclose( outputFile );
+    outputFile = NULL;
+
+    return true;
+}
+
+
+/**
+ * The DXF exporter handles 'colors' as layers...
+ */
+void DXF_PLOTTER::SetColor( EDA_COLOR_T color )
+{
+    if( ( color >= 0 && colorMode )
+       || ( color == BLACK )
+       || ( color == WHITE ) )
+    {
+        m_currentColor = color;
+    }
+    else
+        m_currentColor = BLACK;
+}
+
+/**
+ * DXF rectangle: fill not supported
+ */
+void DXF_PLOTTER::Rect( const wxPoint& p1, const wxPoint& p2, FILL_T fill, int width )
+{
+    MoveTo( p1 );
+    LineTo( wxPoint( p1.x, p2.y ) );
+    LineTo( wxPoint( p2.x, p2.y ) );
+    LineTo( wxPoint( p2.x, p1.y ) );
+    FinishTo( wxPoint( p1.x, p1.y ) );
+}
+
+
+/**
+ * DXF circle: full functionality; it even does 'fills' drawing a
+ * circle with a dual-arc polyline wide as the radius.
+ *
+ * I could use this trick to do other filled primitives
+ */
+void DXF_PLOTTER::Circle( const wxPoint& centre, int diameter, FILL_T fill, int width )
+{
+    wxASSERT( outputFile );
+    double radius = userToDeviceSize( diameter / 2 );
+    DPOINT centre_dev = userToDeviceCoordinates( centre );
+    if( radius > 0 )
+    {
+        wxString cname( ColorGetName( m_currentColor ) );
+        if (!fill)
+        {
+            fprintf( outputFile, "0\nCIRCLE\n8\n%s\n10\n%g\n20\n%g\n40\n%g\n",
+                    TO_UTF8( cname ),
+                    centre_dev.x, centre_dev.y, radius );
+        }
+        if (fill == FILLED_SHAPE)
+        {
+            double r = radius*0.5;
+            fprintf( outputFile, "0\nPOLYLINE\n");
+            fprintf( outputFile, "8\n%s\n66\n1\n70\n1\n", TO_UTF8( cname ));
+            fprintf( outputFile, "40\n%g\n41\n%g\n", radius, radius);
+            fprintf( outputFile, "0\nVERTEX\n8\n%s\n", TO_UTF8( cname ));
+            fprintf( outputFile, "10\n%g\n 20\n%g\n42\n1.0\n",
+                    centre_dev.x-r, centre_dev.y );
+            fprintf( outputFile, "0\nVERTEX\n8\n%s\n", TO_UTF8( cname ));
+            fprintf( outputFile, "10\n%g\n 20\n%g\n42\n1.0\n",
+                    centre_dev.x+r, centre_dev.y );
+            fprintf( outputFile, "0\nSEQEND\n");
+        }
+    }
+}
+
+
+/**
+ * DXF polygon: doesn't fill it but at least it close the filled ones
+ * DXF does not know thick outline.
+ * It does not know thhick segments, therefore filled polygons with thick outline
+ * are converted to inflated polygon by aWidth/2
+ */
+void DXF_PLOTTER::PlotPoly( const std::vector<wxPoint>& aCornerList,
+                            FILL_T aFill, int aWidth)
+{
+    if( aCornerList.size() <= 1 )
+        return;
+
+    unsigned last = aCornerList.size() - 1;
+
+    // Plot outlines with lines (thickness = 0) to define the polygon
+    if( aWidth <= 0  )
+    {
+        MoveTo( aCornerList[0] );
+
+        for( unsigned ii = 1; ii < aCornerList.size(); ii++ )
+            LineTo( aCornerList[ii] );
+
+        // Close polygon if 'fill' requested
+        if( aFill )
+        {
+            if( aCornerList[last] != aCornerList[0] )
+                LineTo( aCornerList[0] );
+        }
+
+        PenFinish();
+
+        return;
+    }
+
+
+    // if the polygon outline has thickness, and is not filled
+    // (i.e. is a polyline) plot outlines with thick segments
+    if( aWidth > 0 && !aFill )
+    {
+        MoveTo( aCornerList[0] );
+
+        for( unsigned ii = 1; ii < aCornerList.size(); ii++ )
+            ThickSegment( aCornerList[ii-1], aCornerList[ii],
+                          aWidth, FILLED );
+
+        return;
+    }
+
+    // The polygon outline has thickness, and is filled
+    // Build and plot the polygon which contains the initial
+    // polygon and its thick outline
+    SHAPE_POLY_SET  bufferOutline;
+    SHAPE_POLY_SET  bufferPolybase;
+    const int circleToSegmentsCount = 16;
+
+    bufferPolybase.NewOutline();
+
+    // enter outline as polygon:
+    for( unsigned ii = 1; ii < aCornerList.size(); ii++ )
+    {
+        TransformRoundedEndsSegmentToPolygon( bufferOutline,
+            aCornerList[ii-1], aCornerList[ii], circleToSegmentsCount, aWidth );
+    }
+
+    // enter the initial polygon:
+    for( unsigned ii = 0; ii < aCornerList.size(); ii++ )
+    {
+        bufferPolybase.Append( aCornerList[ii] );
+    }
+
+    // Merge polygons to build the polygon which contains the initial
+    // polygon and its thick outline
+
+    bufferPolybase.BooleanAdd( bufferOutline ); // create the outline which contains thick outline
+    bufferPolybase.Fracture();
+
+
+    if( bufferPolybase.OutlineCount() < 1 )      // should not happen
+        return;
+
+    const SHAPE_LINE_CHAIN& path = bufferPolybase.COutline( 0 );
+
+    if( path.PointCount() < 2 )           // should not happen
+        return;
+
+    // Now, output the final polygon to DXF file:
+    last = path.PointCount() - 1;
+    VECTOR2I point = path.CPoint( 0 );
+
+    wxPoint startPoint( point.x, point.y );
+    MoveTo( startPoint );
+
+    for( int ii = 1; ii < path.PointCount(); ii++ )
+    {
+        point = path.CPoint( ii );
+        LineTo( wxPoint( point.x, point.y ) );
+    }
+
+    // Close polygon, if needed
+    point = path.CPoint( last );
+    wxPoint endPoint( point.x, point.y );
+
+    if( endPoint != startPoint )
+        LineTo( startPoint );
+
+    PenFinish();
+}
+
+
+void DXF_PLOTTER::PenTo( const wxPoint& pos, char plume )
+{
+    wxASSERT( outputFile );
+    if( plume == 'Z' )
+    {
+        return;
+    }
+    DPOINT pos_dev = userToDeviceCoordinates( pos );
+    DPOINT pen_lastpos_dev = userToDeviceCoordinates( penLastpos );
+
+    if( penLastpos != pos && plume == 'D' )
+    {
+        // DXF LINE
+        wxString cname( ColorGetName( m_currentColor ) );
+        fprintf( outputFile, "0\nLINE\n8\n%s\n10\n%g\n20\n%g\n11\n%g\n21\n%g\n",
+                 TO_UTF8( cname ),
+                 pen_lastpos_dev.x, pen_lastpos_dev.y, pos_dev.x, pos_dev.y );
+    }
+    penLastpos = pos;
+}
+
+
+/**
+ * Dashed lines are not (yet) supported by DXF_PLOTTER
+ */
+void DXF_PLOTTER::SetDash( bool dashed )
+{
+    // NOP for now
+}
+
+
+void DXF_PLOTTER::ThickSegment( const wxPoint& aStart, const wxPoint& aEnd, int aWidth,
+                                EDA_DRAW_MODE_T aPlotMode )
+{
+    MoveTo( aStart );
+    FinishTo( aEnd );
+}
+
+/* Plot an arc in DXF format
+ * Filling is not supported
+ */
+void DXF_PLOTTER::Arc( const wxPoint& centre, double StAngle, double EndAngle, int radius,
+                       FILL_T fill, int width )
+{
+    wxASSERT( outputFile );
+
+    if( radius <= 0 )
+        return;
+
+    // In DXF, arcs are drawn CCW.
+    // In Kicad, arcs are CW or CCW
+    // If StAngle > EndAngle, it is CW. So transform it to CCW
+    if( StAngle > EndAngle )
+    {
+        std::swap( StAngle, EndAngle );
+    }
+
+    DPOINT centre_dev = userToDeviceCoordinates( centre );
+    double radius_dev = userToDeviceSize( radius );
+
+    // Emit a DXF ARC entity
+    wxString cname( ColorGetName( m_currentColor ) );
+    fprintf( outputFile,
+             "0\nARC\n8\n%s\n10\n%g\n20\n%g\n40\n%g\n50\n%g\n51\n%g\n",
+             TO_UTF8( cname ),
+             centre_dev.x, centre_dev.y, radius_dev,
+             StAngle / 10.0, EndAngle / 10.0 );
+}
+
+/**
+ * DXF oval pad: always done in sketch mode
+ */
+void DXF_PLOTTER::FlashPadOval( const wxPoint& pos, const wxSize& aSize, double orient,
+                                EDA_DRAW_MODE_T trace_mode )
+{
+    wxSize size( aSize );
+
+    /* The chip is reduced to an oval tablet with size.y > size.x
+     * (Oval vertical orientation 0) */
+    if( size.x > size.y )
+    {
+        std::swap( size.x, size.y );
+        orient = AddAngles( orient, 900 );
+    }
+
+    sketchOval( pos, size, orient, -1 );
+}
+
+
+/**
+ * DXF round pad: always done in sketch mode; it could be filled but it isn't
+ * pretty if other kinds of pad aren't...
+ */
+void DXF_PLOTTER::FlashPadCircle( const wxPoint& pos, int diametre,
+                                    EDA_DRAW_MODE_T trace_mode )
+{
+    Circle( pos, diametre, NO_FILL );
+}
+
+
+/**
+ * DXF rectangular pad: alwayd done in sketch mode
+ */
+void DXF_PLOTTER::FlashPadRect( const wxPoint& pos, const wxSize& padsize,
+                                double orient, EDA_DRAW_MODE_T trace_mode )
+{
+    wxASSERT( outputFile );
+    wxSize size;
+    int    ox, oy, fx, fy;
+
+    size.x = padsize.x / 2;
+    size.y = padsize.y / 2;
+
+    if( size.x < 0 )
+        size.x = 0;
+    if( size.y < 0 )
+        size.y = 0;
+
+    // If a dimension is zero, the trace is reduced to 1 line
+    if( size.x == 0 )
+    {
+        ox = pos.x;
+        oy = pos.y - size.y;
+        RotatePoint( &ox, &oy, pos.x, pos.y, orient );
+        fx = pos.x;
+        fy = pos.y + size.y;
+        RotatePoint( &fx, &fy, pos.x, pos.y, orient );
+        MoveTo( wxPoint( ox, oy ) );
+        FinishTo( wxPoint( fx, fy ) );
+        return;
+    }
+    if( size.y == 0 )
+    {
+        ox = pos.x - size.x;
+        oy = pos.y;
+        RotatePoint( &ox, &oy, pos.x, pos.y, orient );
+        fx = pos.x + size.x;
+        fy = pos.y;
+        RotatePoint( &fx, &fy, pos.x, pos.y, orient );
+        MoveTo( wxPoint( ox, oy ) );
+        FinishTo( wxPoint( fx, fy ) );
+        return;
+    }
+
+    ox = pos.x - size.x;
+    oy = pos.y - size.y;
+    RotatePoint( &ox, &oy, pos.x, pos.y, orient );
+    MoveTo( wxPoint( ox, oy ) );
+
+    fx = pos.x - size.x;
+    fy = pos.y + size.y;
+    RotatePoint( &fx, &fy, pos.x, pos.y, orient );
+    LineTo( wxPoint( fx, fy ) );
+
+    fx = pos.x + size.x;
+    fy = pos.y + size.y;
+    RotatePoint( &fx, &fy, pos.x, pos.y, orient );
+    LineTo( wxPoint( fx, fy ) );
+
+    fx = pos.x + size.x;
+    fy = pos.y - size.y;
+    RotatePoint( &fx, &fy, pos.x, pos.y, orient );
+    LineTo( wxPoint( fx, fy ) );
+
+    FinishTo( wxPoint( ox, oy ) );
+}
+
+
+/**
+ * DXF trapezoidal pad: only sketch mode is supported
+ */
+void DXF_PLOTTER::FlashPadTrapez( const wxPoint& aPadPos, const wxPoint *aCorners,
+                                  double aPadOrient, EDA_DRAW_MODE_T aTrace_Mode )
+{
+    wxPoint coord[4];       /* coord actual corners of a trapezoidal trace */
+
+    for( int ii = 0; ii < 4; ii++ )
+    {
+        coord[ii] = aCorners[ii];
+        RotatePoint( &coord[ii], aPadOrient );
+        coord[ii] += aPadPos;
+    }
+
+    // Plot edge:
+    MoveTo( coord[0] );
+    LineTo( coord[1] );
+    LineTo( coord[2] );
+    LineTo( coord[3] );
+    FinishTo( coord[0] );
+}
+
+/**
+ * Checks if a given string contains non-ASCII characters.
+ * FIXME: the performance of this code is really poor, but in this case it can be
+ * acceptable because the plot operation is not called very often.
+ * @param string String to check
+ * @return true if it contains some non-ASCII character, false if all characters are
+ *         inside ASCII range (<=255).
+ */
+bool containsNonAsciiChars( const wxString& string )
+{
+    for( unsigned i = 0; i < string.length(); i++ )
+    {
+        wchar_t ch = string[i];
+        if( ch > 255 )
+            return true;
+    }
+    return false;
+}
+
+void DXF_PLOTTER::Text( const wxPoint&              aPos,
+                        enum EDA_COLOR_T            aColor,
+                        const wxString&             aText,
+                        double                      aOrient,
+                        const wxSize&               aSize,
+                        enum EDA_TEXT_HJUSTIFY_T    aH_justify,
+                        enum EDA_TEXT_VJUSTIFY_T    aV_justify,
+                        int                         aWidth,
+                        bool                        aItalic,
+                        bool                        aBold,
+                        bool                        aMultilineAllowed )
+{
+    // Fix me: see how to use DXF text mode for multiline texts
+    if( aMultilineAllowed && !aText.Contains( wxT( "\n" ) ) )
+        aMultilineAllowed = false;  // the text has only one line.
+
+    if( textAsLines || containsNonAsciiChars( aText ) || aMultilineAllowed )
+    {
+        // output text as graphics.
+        // Perhaps multiline texts could be handled as DXF text entity
+        // but I do not want spend time about this (JPC)
+        PLOTTER::Text( aPos, aColor, aText, aOrient, aSize, aH_justify, aV_justify,
+                aWidth, aItalic, aBold, aMultilineAllowed );
+    }
+    else
+    {
+        /* Emit text as a text entity. This loses formatting and shape but it's
+           more useful as a CAD object */
+        DPOINT origin_dev = userToDeviceCoordinates( aPos );
+        SetColor( aColor );
+        wxString cname( ColorGetName( m_currentColor ) );
+        DPOINT size_dev = userToDeviceSize( aSize );
+        int h_code = 0, v_code = 0;
+        switch( aH_justify )
+        {
+        case GR_TEXT_HJUSTIFY_LEFT:
+            h_code = 0;
+            break;
+        case GR_TEXT_HJUSTIFY_CENTER:
+            h_code = 1;
+            break;
+        case GR_TEXT_HJUSTIFY_RIGHT:
+            h_code = 2;
+            break;
+        }
+        switch( aV_justify )
+        {
+        case GR_TEXT_VJUSTIFY_TOP:
+            v_code = 3;
+            break;
+        case GR_TEXT_VJUSTIFY_CENTER:
+            v_code = 2;
+            break;
+        case GR_TEXT_VJUSTIFY_BOTTOM:
+            v_code = 1;
+            break;
+        }
+
+        // Position, size, rotation and alignment
+        // The two alignment point usages is somewhat idiot (see the DXF ref)
+        // Anyway since we don't use the fit/aligned options, they're the same
+        fprintf( outputFile,
+                "  0\n"
+                "TEXT\n"
+                "  7\n"
+                "%s\n"          // Text style
+                "  8\n"
+                "%s\n"          // Layer name
+                "  10\n"
+                "%g\n"          // First point X
+                "  11\n"
+                "%g\n"          // Second point X
+                "  20\n"
+                "%g\n"          // First point Y
+                "  21\n"
+                "%g\n"          // Second point Y
+                "  40\n"
+                "%g\n"          // Text height
+                "  41\n"
+                "%g\n"          // Width factor
+                "  50\n"
+                "%g\n"          // Rotation
+                "  51\n"
+                "%g\n"          // Oblique angle
+                "  71\n"
+                "%d\n"          // Mirror flags
+                "  72\n"
+                "%d\n"          // H alignment
+                "  73\n"
+                "%d\n",         // V alignment
+                aBold ? (aItalic ? "KICADBI" : "KICADB")
+                      : (aItalic ? "KICADI" : "KICAD"),
+                TO_UTF8( cname ),
+                origin_dev.x, origin_dev.x,
+                origin_dev.y, origin_dev.y,
+                size_dev.y, fabs( size_dev.x / size_dev.y ),
+                aOrient / 10.0,
+                aItalic ? DXF_OBLIQUE_ANGLE : 0,
+                size_dev.x < 0 ? 2 : 0, // X mirror flag
+                h_code, v_code );
+
+        /* There are two issue in emitting the text:
+           - Our overline character (~) must be converted to the appropriate
+           control sequence %%O or %%o
+           - Text encoding in DXF is more or less unspecified since depends on
+           the DXF declared version, the acad version reading it *and* some
+           system variables to be put in the header handled only by newer acads
+           Also before R15 unicode simply is not supported (you need to use
+           bigfonts which are a massive PITA). Common denominator solution:
+           use Latin1 (and however someone could choke on it, anyway). Sorry
+           for the extended latin people. If somewant want to try fixing this
+           recent version seems to use UTF-8 (and not UCS2 like the rest of
+           Windows)
+
+           XXX Actually there is a *third* issue: older DXF formats are limited
+           to 255 bytes records (it was later raised to 2048); since I'm lazy
+           and text so long is not probable I just don't implement this rule.
+           If someone is interested in fixing this, you have to emit the first
+           partial lines with group code 3 (max 250 bytes each) and then finish
+           with a group code 1 (less than 250 bytes). The DXF refs explains it
+           in no more details...
+         */
+
+        bool overlining = false;
+        fputs( "  1\n", outputFile );
+        for( unsigned i = 0; i < aText.length(); i++ )
+        {
+            /* Here I do a bad thing: writing the output one byte at a time!
+               but today I'm lazy and I have no idea on how to coerce a Unicode
+               wxString to spit out latin1 encoded text ...
+
+               Atleast stdio is *supposed* to do output buffering, so there is
+               hope is not too slow */
+            wchar_t ch = aText[i];
+            if( ch > 255 )
+            {
+                // I can't encode this...
+                putc( '?', outputFile );
+            }
+            else
+            {
+                if( ch == '~' )
+                {
+                    // Handle the overline toggle
+                    fputs( overlining ? "%%o" : "%%O", outputFile );
+                    overlining = !overlining;
+                }
+                else
+                {
+                    putc( ch, outputFile );
+                }
+            }
+        }
+        putc( '\n', outputFile );
+    }
+}
+