/** * @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) 2016 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 #include #include #include #include #include #include #include #include /** * 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; /* 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 } }; // A helper function to create a color name acceptable in DXF files // DXF files do not use a RGB definition static wxString getDXFColorName( COLOR4D aColor ) { EDA_COLOR_T color = ColorFindNearest( int( aColor.r*255 ), int( aColor.g*255 ), int( aColor.b*255 ) ); wxString cname( dxf_layer[color].name ); return cname; } /** * 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 = COLOR4D::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) */ 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( COLOR4D color ) { if( ( colorMode ) || ( color == COLOR4D::BLACK ) || ( color == COLOR4D::WHITE ) ) { m_currentColor = color; } else m_currentColor = COLOR4D::BLACK; } /** * DXF rectangle: fill not supported */ void DXF_PLOTTER::Rect( const wxPoint& p1, const wxPoint& p2, FILL_T fill, int width ) { wxASSERT( outputFile ); 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 = getDXFColorName( 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& aCornerList, FILL_T aFill, int aWidth, void * aData ) { 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, NULL ); 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 // create the outline which contains thick outline: bufferPolybase.BooleanAdd( bufferOutline, SHAPE_POLY_SET::PM_FAST ); bufferPolybase.Fracture( SHAPE_POLY_SET::PM_FAST ); 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 = getDXFColorName( 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, void* aData ) { 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 = getDXFColorName( 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, void* aData ) { wxASSERT( outputFile ); 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, void* aData ) { wxASSERT( outputFile ); 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, void* aData ) { 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 ) ); } void DXF_PLOTTER::FlashPadRoundRect( const wxPoint& aPadPos, const wxSize& aSize, int aCornerRadius, double aOrient, EDA_DRAW_MODE_T aTraceMode, void* aData ) { SHAPE_POLY_SET outline; const int segmentToCircleCount = 64; TransformRoundRectToPolygon( outline, aPadPos, aSize, aOrient, aCornerRadius, segmentToCircleCount ); // TransformRoundRectToPolygon creates only one convex polygon SHAPE_LINE_CHAIN& poly = outline.Outline( 0 ); MoveTo( wxPoint( poly.Point( 0 ).x, poly.Point( 0 ).y ) ); for( int ii = 1; ii < poly.PointCount(); ++ii ) LineTo( wxPoint( poly.Point( ii ).x, poly.Point( ii ).y ) ); FinishTo( wxPoint( poly.Point( 0 ).x, poly.Point( 0 ).y ) ); } void DXF_PLOTTER::FlashPadCustom( const wxPoint& aPadPos, const wxSize& aSize, SHAPE_POLY_SET* aPolygons, EDA_DRAW_MODE_T aTraceMode, void* aData ) { for( int cnt = 0; cnt < aPolygons->OutlineCount(); ++cnt ) { SHAPE_LINE_CHAIN& poly = aPolygons->Outline( cnt ); MoveTo( wxPoint( poly.Point( 0 ).x, poly.Point( 0 ).y ) ); for( int ii = 1; ii < poly.PointCount(); ++ii ) LineTo( wxPoint( poly.Point( ii ).x, poly.Point( ii ).y ) ); FinishTo(wxPoint( poly.Point( 0 ).x, poly.Point( 0 ).y ) ); } } /** * 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, void* aData ) { wxASSERT( outputFile ); 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, COLOR4D 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, void* aData ) { // 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 = getDXFColorName( 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 ); } }