Update for bitmap, image on scaling, transparancy,

[wxWidgets.git] / src / gtk1 / dcps.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        dcps.cpp
// Purpose:     wxPostScriptDC implementation
// Author:      Julian Smart, Robert Roebling, Markus Holzhem
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation
#pragma interface
#endif

#include "wx/postscrp.h"
#include "wx/dcmemory.h"
#include "wx/utils.h"
#include "wx/intl.h"
#include "wx/filedlg.h"
#include "wx/app.h"
#include "wx/msgdlg.h"

//-----------------------------------------------------------------------------
// start and end of document/page
//-----------------------------------------------------------------------------

static const char *wxPostScriptHeaderEllipse = "\
/ellipsedict 8 dict def\n\
ellipsedict /mtrx matrix put\n\
/ellipse {\n\
        ellipsedict begin\n\
        /endangle exch def\n\
        /startangle exch def\n\
        /yrad exch def\n\
        /xrad exch def\n\
        /y exch def\n\
        /x exch def\n\
        /savematrix mtrx currentmatrix def\n\
        x y translate\n\
        xrad yrad scale\n\
        0 0 1 startangle endangle arc\n\
        savematrix setmatrix\n\
        end\n\
        } def\n\
";

static const char *wxPostScriptHeaderEllipticArc= "\
/ellipticarcdict 8 dict def\n\
ellipticarcdict /mtrx matrix put\n\
/ellipticarc\n\
{ ellipticarcdict begin\n\
  /do_fill exch def\n\
  /endangle exch def\n\
  /startangle exch def\n\
  /yrad exch def\n\
  /xrad exch def \n\
  /y exch def\n\
  /x exch def\n\
  /savematrix mtrx currentmatrix def\n\
  x y translate\n\
  xrad yrad scale\n\
  do_fill { 0 0 moveto } if\n\
  0 0 1 startangle endangle arc\n\
  savematrix setmatrix\n\
  do_fill { fill }{ stroke } ifelse\n\
  end\n\
} def\n";

static const char *wxPostScriptHeaderSpline = "\
/DrawSplineSection {\n\
        /y3 exch def\n\
        /x3 exch def\n\
        /y2 exch def\n\
        /x2 exch def\n\
        /y1 exch def\n\
        /x1 exch def\n\
        /xa x1 x2 x1 sub 0.666667 mul add def\n\
        /ya y1 y2 y1 sub 0.666667 mul add def\n\
        /xb x3 x2 x3 sub 0.666667 mul add def\n\
        /yb y3 y2 y3 sub 0.666667 mul add def\n\
        x1 y1 lineto\n\
        xa ya xb yb x3 y3 curveto\n\
        } def\n\
";

static const char *wxPostScriptHeaderColourImage = "\
% define 'colorimage' if it isn't defined\n\
%   ('colortogray' and 'mergeprocs' come from xwd2ps\n\
%     via xgrab)\n\
/colorimage where   % do we know about 'colorimage'?\n\
  { pop }           % yes: pop off the 'dict' returned\n\
  {                 % no:  define one\n\
    /colortogray {  % define an RGB->I function\n\
      /rgbdata exch store    % call input 'rgbdata'\n\
      rgbdata length 3 idiv\n\
      /npixls exch store\n\
      /rgbindx 0 store\n\
      0 1 npixls 1 sub {\n\
        grays exch\n\
        rgbdata rgbindx       get 20 mul    % Red\n\
        rgbdata rgbindx 1 add get 32 mul    % Green\n\
        rgbdata rgbindx 2 add get 12 mul    % Blue\n\
        add add 64 idiv      % I = .5G + .31R + .18B\n\
        put\n\
        /rgbindx rgbindx 3 add store\n\
      } for\n\
      grays 0 npixls getinterval\n\
    } bind def\n\
\n\
    % Utility procedure for colorimage operator.\n\
    % This procedure takes two procedures off the\n\
    % stack and merges them into a single procedure.\n\
\n\
    /mergeprocs { % def\n\
      dup length\n\
      3 -1 roll\n\
      dup\n\
      length\n\
      dup\n\
      5 1 roll\n\
      3 -1 roll\n\
      add\n\
      array cvx\n\
      dup\n\
      3 -1 roll\n\
      0 exch\n\
      putinterval\n\
      dup\n\
      4 2 roll\n\
      putinterval\n\
    } bind def\n\
\n\
    /colorimage { % def\n\
      pop pop     % remove 'false 3' operands\n\
      {colortogray} mergeprocs\n\
      image\n\
    } bind def\n\
  } ifelse          % end of 'false' case\n\
";

static char wxPostScriptHeaderReencodeISO1[] =
    "\n/reencodeISO {\n"
"dup dup findfont dup length dict begin\n"
"{ 1 index /FID ne { def }{ pop pop } ifelse } forall\n"
"/Encoding ISOLatin1Encoding def\n"
"currentdict end definefont\n"
"} def\n"
"/ISOLatin1Encoding [\n"
"/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef\n"
"/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef\n"
"/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef\n"
"/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef\n"
"/space/exclam/quotedbl/numbersign/dollar/percent/ampersand/quoteright\n"
"/parenleft/parenright/asterisk/plus/comma/minus/period/slash\n"
"/zero/one/two/three/four/five/six/seven/eight/nine/colon/semicolon\n"
"/less/equal/greater/question/at/A/B/C/D/E/F/G/H/I/J/K/L/M/N\n"
"/O/P/Q/R/S/T/U/V/W/X/Y/Z/bracketleft/backslash/bracketright\n"
"/asciicircum/underscore/quoteleft/a/b/c/d/e/f/g/h/i/j/k/l/m\n"
"/n/o/p/q/r/s/t/u/v/w/x/y/z/braceleft/bar/braceright/asciitilde\n"
"/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef\n"
"/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef/.notdef\n"
"/.notdef/dotlessi/grave/acute/circumflex/tilde/macron/breve\n"
"/dotaccent/dieresis/.notdef/ring/cedilla/.notdef/hungarumlaut\n";

static char wxPostScriptHeaderReencodeISO2[] =
"/ogonek/caron/space/exclamdown/cent/sterling/currency/yen/brokenbar\n"
"/section/dieresis/copyright/ordfeminine/guillemotleft/logicalnot\n"
"/hyphen/registered/macron/degree/plusminus/twosuperior/threesuperior\n"
"/acute/mu/paragraph/periodcentered/cedilla/onesuperior/ordmasculine\n"
"/guillemotright/onequarter/onehalf/threequarters/questiondown\n"
"/Agrave/Aacute/Acircumflex/Atilde/Adieresis/Aring/AE/Ccedilla\n"
"/Egrave/Eacute/Ecircumflex/Edieresis/Igrave/Iacute/Icircumflex\n"
"/Idieresis/Eth/Ntilde/Ograve/Oacute/Ocircumflex/Otilde/Odieresis\n"
"/multiply/Oslash/Ugrave/Uacute/Ucircumflex/Udieresis/Yacute\n"
"/Thorn/germandbls/agrave/aacute/acircumflex/atilde/adieresis\n"
"/aring/ae/ccedilla/egrave/eacute/ecircumflex/edieresis/igrave\n"
"/iacute/icircumflex/idieresis/eth/ntilde/ograve/oacute/ocircumflex\n"
"/otilde/odieresis/divide/oslash/ugrave/uacute/ucircumflex/udieresis\n"
"/yacute/thorn/ydieresis\n"
        "] def\n\n";

//-------------------------------------------------------------------------------
// wxPostScriptDC
//-------------------------------------------------------------------------------

wxPostScriptDC::wxPostScriptDC ()
{
    m_pstream = (ofstream*) NULL;
    
    m_currentRed = 0;
    m_currentGreen = 0;
    m_currentBlue = 0;
    
    m_pageNumber = 0;
    
    m_clipping = FALSE;
    
    m_underlinePosition = 0.0;
    m_underlineThickness = 0.0;

    m_signX =  1;  // default x-axis left to right
    m_signY = -1;  // default y-axis bottom up -> top down
}

wxPostScriptDC::wxPostScriptDC (const wxString& file, bool interactive, wxWindow *parent)
{
    m_pstream = (ofstream*) NULL;
    
    m_currentRed = 0;
    m_currentGreen = 0;
    m_currentBlue = 0;
    
    m_pageNumber = 0;
    
    m_clipping = FALSE;
    
    m_underlinePosition = 0.0;
    m_underlineThickness = 0.0;

    m_signX =  1;  // default x-axis left to right
    m_signY = -1;  // default y-axis bottom up -> top down

    Create(file, interactive, parent);
}

bool wxPostScriptDC::Create(const wxString& file, bool interactive, wxWindow *parent)
{
    m_isInteractive = interactive;

    m_title = "";
    m_filename = file;

#ifdef __WXMSW__
    // Can only send to file in Windows
    wxThePrintSetupData->SetPrinterMode(PS_FILE);
#endif

    if (m_isInteractive)
    {
        if ((m_ok = PrinterDialog (parent) ) == FALSE) return FALSE;
    }
    else
    {
        m_ok = TRUE;
    }
    
    return m_ok;
}

wxPostScriptDC::~wxPostScriptDC ()
{
    if (m_pstream) delete m_pstream;
}

bool wxPostScriptDC::Ok() const
{
  return (m_ok && m_pstream);
}
  
bool wxPostScriptDC::PrinterDialog(wxWindow *parent)
{
    wxPostScriptPrintDialog dialog( parent, _("Printer Settings"), wxPoint(150, 150), wxSize(400, 400), 
                                    wxDEFAULT_DIALOG_STYLE | wxDIALOG_MODAL );
    m_ok = (dialog.ShowModal () == wxID_OK);

    if (!m_ok) return FALSE;

    if ((m_filename == "") && 
        (wxThePrintSetupData->GetPrinterMode() == PS_PREVIEW  || 
         wxThePrintSetupData->GetPrinterMode() == PS_PRINTER))
    {
// steve, 05.09.94
#ifdef __VMS__
      wxThePrintSetupData->SetPrinterFile("preview");
#else
      // For PS_PRINTER action this depends on a Unix-style print spooler
      // since the wx_printer_file can be destroyed during a session
      // @@@ TODO: a Windows-style answer for non-Unix
      char userId[256];
      wxGetUserId (userId, sizeof (userId) / sizeof (char));
      char tmp[256];
      strcpy (tmp, "/tmp/preview_");
      strcat (tmp, userId);
      wxThePrintSetupData->SetPrinterFile(tmp);
#endif
      char tmp2[256];
      strcpy(tmp2, wxThePrintSetupData->GetPrinterFile());
      strcat (tmp2, ".ps");
      wxThePrintSetupData->SetPrinterFile(tmp2);
      m_filename = tmp2;
    }
    else if ((m_filename == "") && (wxThePrintSetupData->GetPrinterMode() == PS_FILE))
    {
      char *file = wxSaveFileSelector (_("PostScript"), "ps");
      if (!file)
      {
        m_ok = FALSE;
        return FALSE;
      }
      wxThePrintSetupData->SetPrinterFile(file);
      m_filename = file;
      m_ok = TRUE;
    }

    return m_ok;
}

void wxPostScriptDC::SetClippingRegion (long x, long y, long w, long h)
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if (m_clipping) return;

    wxDC::SetClippingRegion( x, y, w, h );
    
    m_clipping = TRUE;
    *m_pstream << "gsave\n" 
               << "newpath\n" 
               << XLOG2DEV(x)   << " " << YLOG2DEV(y)   << " moveto\n"
               << XLOG2DEV(x+w) << " " << YLOG2DEV(y)   << " lineto\n"
               << XLOG2DEV(x+w) << " " << YLOG2DEV(y+h) << " lineto\n"
               << XLOG2DEV(x)   << " " << YLOG2DEV(y+h) << " lineto\n"
               << "closepath clip newpath\n";
}

void wxPostScriptDC::SetClippingRegion( const wxRegion &WXUNUSED(region) )
{
}

void wxPostScriptDC::DestroyClippingRegion()
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    wxDC::DestroyClippingRegion();
    
    if (m_clipping)
    {
        m_clipping = FALSE;
        *m_pstream << "grestore\n";
    }
}

void wxPostScriptDC::Clear()
{
    wxFAIL_MSG( "wxPostScriptDC::Clear not implemented." );
}

void wxPostScriptDC::FloodFill (long WXUNUSED(x), long WXUNUSED(y), const wxColour &WXUNUSED(col), int WXUNUSED(style))
{
    wxFAIL_MSG( "wxPostScriptDC::FloodFill not implemented." );
}

bool wxPostScriptDC::GetPixel (long WXUNUSED(x), long WXUNUSED(y), wxColour * WXUNUSED(col)) const
{
    wxFAIL_MSG( "wxPostScriptDC::GetPixel not implemented." );
    return FALSE;
}

void wxPostScriptDC::CrossHair (long WXUNUSED(x), long WXUNUSED(y))
{
    wxFAIL_MSG( "wxPostScriptDC::CrossHair not implemented." );
}

void wxPostScriptDC::DrawLine (long x1, long y1, long x2, long y2)
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if  (m_pen.GetStyle() == wxTRANSPARENT) return;
    
    SetPen( m_pen );
    
    *m_pstream << "newpath\n"
               <<  XLOG2DEV(x1) << " " <<  YLOG2DEV (y1) << " moveto\n"
               <<  XLOG2DEV(x2) << " " <<  YLOG2DEV (y2) << " lineto\n"
               << "stroke\n";
                   
    CalcBoundingBox( x1, y1 );
    CalcBoundingBox( x2, y2 );
}

#define RAD2DEG 57.29577951308

void wxPostScriptDC::DrawArc (long x1, long y1, long x2, long y2, long xc, long yc)
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    long dx = x1 - xc;
    long dy = y1 - yc;
    long radius = (long) sqrt(dx*dx+dy*dy);
    double alpha1, alpha2;

    if (x1 == x2 && y1 == y2) 
    {
        alpha1 = 0.0;
        alpha2 = 360.0;
    } else if (radius == 0.0) 
    {
        alpha1 = alpha2 = 0.0;
    } else 
    {
        alpha1 = (x1 - xc == 0) ?
            (y1 - yc < 0) ? 90.0 : -90.0 :
            -atan2(double(y1-yc), double(x1-xc)) * RAD2DEG;
        alpha2 = (x2 - xc == 0) ?
            (y2 - yc < 0) ? 90.0 : -90.0 :
            -atan2(double(y2-yc), double(x2-xc)) * RAD2DEG;
    }
    while (alpha1 <= 0)   alpha1 += 360;
    while (alpha2 <= 0)   alpha2 += 360; // adjust angles to be between
    while (alpha1 > 360)  alpha1 -= 360; // 0 and 360 degree
    while (alpha2 > 360)  alpha2 -= 360;

    if (m_brush.GetStyle() != wxTRANSPARENT) 
    {
        SetBrush( m_brush );
        *m_pstream << "newpath\n"
                 << XLOG2DEV(xc)        << " "
                 << YLOG2DEV(yc)        << " "
                 << XLOG2DEVREL(radius) << " "
                 << YLOG2DEVREL(radius) << " "
                 << alpha1               << " "
                 << alpha2               << " ellipse\n"
                 << XLOG2DEV(xc)        << " "
                 << YLOG2DEV(yc)        << " lineto\n"
                 << "closepath\n"
                 << "fill\n";
    }
    
    if (m_pen.GetStyle() != wxTRANSPARENT) 
    {
        SetPen( m_pen );
        *m_pstream << "newpath\n"
                 << XLOG2DEV(xc)        << " "
                 << YLOG2DEV(yc)        << " "
                 << XLOG2DEVREL(radius) << " "
                 << YLOG2DEVREL(radius) << " "
                 << alpha1               << " "
                 << alpha2               << " ellipse\n"
                 << "stroke\n";
    }
    
    CalcBoundingBox( xc-radius, yc-radius );
    CalcBoundingBox( xc+radius, yc+radius );
}

void wxPostScriptDC::DrawEllipticArc(long x,long y,long w,long h,double sa,double ea)
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if (sa>=360 || sa<=-360) sa=sa-int(sa/360)*360;
    if (ea>=360 || ea<=-360) ea=ea-int(ea/360)*360;
    if (sa<0) sa+=360;
    if (ea<0) ea+=360;
    
    if (sa==ea)
    {
        DrawEllipse(x,y,w,h);
        return;
    }

    if (m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush( m_brush );

        *m_pstream << "newpath\n" 
                   << XLOG2DEV(x+w/2) << " " << YLOG2DEV(y+h/2) << " " 
                   << XLOG2DEVREL(w/2) << " " << YLOG2DEVREL(h/2) << " " 
                   << int(sa) <<" "<< int(ea) << " true ellipticarc\n";

        CalcBoundingBox( x ,y );
        CalcBoundingBox( x+w, y+h );
    }
    
    if (m_pen.GetStyle () != wxTRANSPARENT)
    {
        SetPen( m_pen );

        *m_pstream << "newpath\n" 
                   << XLOG2DEV(x+w/2) << " " << YLOG2DEV(y+h/2) << " " 
                   << XLOG2DEVREL(w/2) << " " << XLOG2DEVREL(h/2) << " " 
                   << int(sa) <<" "<< int(ea) << " false ellipticarc\n";

        CalcBoundingBox( x, y );
        CalcBoundingBox( x+w, y+h );
    }
}

void wxPostScriptDC::DrawPoint (long x, long y)
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if (m_pen.GetStyle() == wxTRANSPARENT) return;
    
    SetPen (m_pen);
    
    *m_pstream << "newpath\n"
             << XLOG2DEV(x)   << " " << YLOG2DEV (y) << " moveto\n"
             << XLOG2DEV(x+1) << " " << YLOG2DEV (y) << " lineto\n"
             << "stroke\n";
    
    CalcBoundingBox( x, y );
}

void wxPostScriptDC::DrawPolygon (int n, wxPoint points[], long xoffset, long yoffset, int WXUNUSED(fillStyle))
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if (n <= 0) return;
    
    if (m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush( m_brush );
          
        *m_pstream << "newpath\n";

        long xx = XLOG2DEV(points[0].x + xoffset);
        long yy = YLOG2DEV(points[0].y + yoffset);
        *m_pstream << xx << " " << yy << " moveto\n";
        CalcBoundingBox( points[0].x + xoffset, points[0].y + yoffset );

        for (int i = 1; i < n; i++)
        {
            xx = XLOG2DEV(points[i].x + xoffset);
            yy = YLOG2DEV(points[i].y + yoffset);
            *m_pstream << xx << " " << yy << " lineto\n";
            CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset);
        }
        *m_pstream << "fill\n";
    }

    if (m_pen.GetStyle () != wxTRANSPARENT)
    {
        SetPen( m_pen );
        
        *m_pstream << "newpath\n";

        long xx = XLOG2DEV(points[0].x + xoffset);
        long yy = YLOG2DEV(points[0].y + yoffset);
        *m_pstream << xx << " " << yy << " moveto\n";
        CalcBoundingBox( points[0].x + xoffset, points[0].y + yoffset );

        for (int i = 1; i < n; i++)
        {
            xx = XLOG2DEV(points[i].x + xoffset);
            yy = YLOG2DEV(points[i].y + yoffset);
            *m_pstream << xx << " " << yy << " lineto\n";
            CalcBoundingBox( points[i].x + xoffset, points[i].y + yoffset);
        }

        *m_pstream << "stroke\n";
    }
}

void wxPostScriptDC::DrawLines (int n, wxPoint points[], long xoffset, long yoffset)
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if (m_pen.GetStyle() == wxTRANSPARENT) return;
    if (n <= 0) return;
  
    SetPen (m_pen);
    
    for (int i=0; i<n ; ++i)
    {
        CalcBoundingBox( XLOG2DEV(points[i].x+xoffset), YLOG2DEV(points[i].y+yoffset));
    }

    *m_pstream << "newpath\n"
               << XLOG2DEV(points[0].x+xoffset) << " "
               << YLOG2DEV(points[0].y+yoffset) << " moveto\n";
             
    for (int i = 1; i < n; i++) 
    {
        *m_pstream << XLOG2DEV(points[i].x+xoffset) << " "
                   << YLOG2DEV(points[i].y+yoffset) << " lineto\n";
    }
    
    *m_pstream << "stroke\n";
}

void wxPostScriptDC::DrawRectangle (long x, long y, long width, long height)
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if (m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush( m_brush );

        *m_pstream << "newpath\n"
                   << XLOG2DEV(x) << " " << YLOG2DEV(y) << " moveto\n"
                   << XLOG2DEV(x + width) << " " << YLOG2DEV(y) << " lineto\n"
                   << XLOG2DEV(x + width) << " " << YLOG2DEV(y + height) << " lineto\n"
                   << XLOG2DEV(x) << " " << YLOG2DEV(y + height) << " lineto\n"
                   << "closepath\n"
                   << "fill\n";

        CalcBoundingBox( x, y );
        CalcBoundingBox( x + width, y + height );
    }
    
    if (m_pen.GetStyle () != wxTRANSPARENT)
    {
        SetPen (m_pen);

        *m_pstream << "newpath\n"
                   << XLOG2DEV(x) << " " << YLOG2DEV(y) << " moveto\n"
                   << XLOG2DEV(x + width) << " " << YLOG2DEV(y) << " lineto\n"
                   << XLOG2DEV(x + width) << " " << YLOG2DEV(y + height) << " lineto\n"
                   << XLOG2DEV(x) << " " << YLOG2DEV(y + height) << " lineto\n"
                   << "closepath\n"
                   << "stroke\n";

        CalcBoundingBox( x, y );
        CalcBoundingBox( x + width, y + height );
    }
}

void wxPostScriptDC::DrawRoundedRectangle (long x, long y, long width, long height, double radius)
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if (radius < 0.0)
    {
        // Now, a negative radius is interpreted to mean
        // 'the proportion of the smallest X or Y dimension'
        double smallest = 0.0;
        if (width < height)
            smallest = width;
        else
            smallest = height;
        radius =  (-radius * smallest);
    }
    
    long rad = (long) radius;

    if (m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush( m_brush );
        
        // Draw rectangle anticlockwise
        *m_pstream << "newpath\n"
                   << XLOG2DEV(x + rad) << " " << YLOG2DEV(y + rad) << " " << XLOG2DEVREL(rad) << " 90 180 arc\n"
                   << XLOG2DEV(x) << " " << YLOG2DEV(y + rad) << " moveto\n"
                   << XLOG2DEV(x + rad) << " " << YLOG2DEV(y + height - rad) << " " << XLOG2DEVREL(rad) << " 180 270 arc\n"
                   << XLOG2DEV(x + width - rad) << " " << YLOG2DEV(y + height) << " lineto\n"
                   << XLOG2DEV(x + width - rad) << " " << YLOG2DEV(y + height - rad) << " " << XLOG2DEVREL(rad) << " 270 0 arc\n"
                   << XLOG2DEV(x + width) << " " << YLOG2DEV(y + rad) << " lineto\n"
                   << XLOG2DEV(x + width - rad) << " " << YLOG2DEV(y + rad) << " " << XLOG2DEVREL(rad) << " 0 90 arc\n"
                   << XLOG2DEV(x + rad) << " " << YLOG2DEV(y) << " lineto\n"
                   << "closepath\n"
                   << "fill\n";

        CalcBoundingBox( x, y );
        CalcBoundingBox( x + width, y + height );
    }
    
    if (m_pen.GetStyle () != wxTRANSPARENT)
    {
        SetPen (m_pen);
        
        // Draw rectangle anticlockwise
        *m_pstream << "newpath\n"
                   << XLOG2DEV(x + rad) << " " << YLOG2DEV(y + rad) << " " << XLOG2DEVREL(rad) << " 90 180 arc\n"
                   << XLOG2DEV(x) << " " << YLOG2DEV(y + rad) << " moveto\n"
                   << XLOG2DEV(x + rad) << " " << YLOG2DEV(y + height - rad) << " " << XLOG2DEVREL(rad) << " 180 270 arc\n"
                   << XLOG2DEV(x + width - rad) << " " << YLOG2DEV(y + height) << " lineto\n"
                   << XLOG2DEV(x + width - rad) << " " << YLOG2DEV(y + height - rad) << " " << XLOG2DEVREL(rad) << " 270 0 arc\n"
                   << XLOG2DEV(x + width) << " " << YLOG2DEV(y + rad) << " lineto\n"
                   << XLOG2DEV(x + width - rad) << " " << YLOG2DEV(y + rad) << " " << XLOG2DEVREL(rad) << " 0 90 arc\n"
                   << XLOG2DEV(x + rad) << " " << YLOG2DEV(y) << " lineto\n"
                   << "closepath\n"
                   << "stroke\n";

        CalcBoundingBox( x, y );
        CalcBoundingBox( x + width, y + height );
    }
}

void wxPostScriptDC::DrawEllipse (long x, long y, long width, long height)
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if (m_brush.GetStyle () != wxTRANSPARENT)
    {
        SetBrush (m_brush);

        *m_pstream << "newpath\n" 
                   << XLOG2DEV(x + width / 2) << " " << YLOG2DEV(y + height / 2) << " " 
                   << XLOG2DEV(width / 2) << " " << YLOG2DEVREL(height / 2) << " 0 360 ellipse\n" 
                   << "fill\n";

        CalcBoundingBox( x - width, y - height );
        CalcBoundingBox( x + width, y + height );
    }
    
    if (m_pen.Ok() && m_pen.GetStyle () != wxTRANSPARENT)
    {
        SetPen (m_pen);

        *m_pstream << "newpath\n" 
                   << XLOG2DEV(x + width / 2) << " " << YLOG2DEV(y + height / 2) << " " 
                   << XLOG2DEV(width / 2) << " " << YLOG2DEVREL(height / 2) << " 0 360 ellipse\n" 
                   << "stroke\n";

        CalcBoundingBox( x - width, y - height );
        CalcBoundingBox( x + width, y + height );
    }
}

void wxPostScriptDC::DrawIcon (const wxIcon& icon, long x, long y)
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    wxMemoryDC memDC;
    memDC.SelectObject( icon );
    Blit(x, y, icon.GetWidth(), icon.GetHeight(), &memDC, 0, 0);
}

void wxPostScriptDC::DrawBitmap( const wxBitmap& bitmap, long x, long y, bool useMask )
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    wxMemoryDC memDC;
    memDC.SelectObject( bitmap );
    Blit( x, y, bitmap.GetWidth(), bitmap.GetHeight(), &memDC, 0, 0, useMask );
}

void wxPostScriptDC::SetFont (const wxFont& font)
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if (!font.Ok())  return;
    
    m_font = font;
    
    char *name = wxTheFontNameDirectory->GetPostScriptName( m_font.GetFamily(),
                                                            m_font.GetWeight(),
                                                            m_font.GetStyle() );
    if (!name) name = "Times-Roman";

    *m_pstream << "/" << name << " reencodeISO def\n"
               << "/" << name << " findfont\n"
               << YLOG2DEVREL(font.GetPointSize())
               << " scalefont setfont\n";
}

void wxPostScriptDC::SetPen( const wxPen& pen )
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if (!pen.Ok()) return;
    
    int oldStyle = m_pen.GetStyle();

    m_pen = pen;

    *m_pstream << XLOG2DEVREL(m_pen.GetWidth()) << " setlinewidth\n";

/*
     Line style - WRONG: 2nd arg is OFFSET
     
     Here, I'm afraid you do not conceive meaning of parameters of 'setdash'
     operator correctly. You should look-up this in the Red Book: the 2nd parame-
     ter is not number of values in the array of the first one, but an offset
     into this description of the pattern. I mean a real *offset* not index
     into array. I.e. If the command is [3 4] 1 setdash   is used, then there
     will be first black line *2* units long, then space 4 units, then the
     pattern of *3* units black, 4 units space will be repeated.
*/

    static const char *dotted = "[2 5] 2";
    static const char *short_dashed = "[4 4] 2";
    static const char *long_dashed = "[4 8] 2";
    static const char *dotted_dashed = "[6 6 2 6] 4";

    const char *psdash = (char *) NULL;
    switch (m_pen.GetStyle ())
    {
        case wxDOT:           psdash = dotted;         break;
        case wxSHORT_DASH:    psdash = short_dashed;   break;
        case wxLONG_DASH:     psdash = long_dashed;    break;
        case wxDOT_DASH:      psdash = dotted_dashed;  break;
        case wxSOLID:
        case wxTRANSPARENT:
        default:              psdash = "[] 0";         break;
    }
    
    if (oldStyle != m_pen.GetStyle())
    {
        *m_pstream << psdash << " setdash\n";
    }

    // Line colour
    unsigned char red = m_pen.GetColour().Red();
    unsigned char blue = m_pen.GetColour().Blue();
    unsigned char green = m_pen.GetColour().Green();

    if (!m_colour)
    {
        // Anything not white is black
        if (!(red == (unsigned char) 255 && blue == (unsigned char) 255
            && green == (unsigned char) 255))
        {
            red = (unsigned char) 0;
            green = (unsigned char) 0;
            blue = (unsigned char) 0;
        }
        
        // setgray here ?
    }

    if (!(red == m_currentRed && green == m_currentGreen && blue == m_currentBlue))
    {
       long redPS = (long) (((int) red) / 255.0);
       long bluePS = (long) (((int) blue) / 255.0);
       long greenPS = (long) (((int) green) / 255.0);

       *m_pstream << redPS << " " << greenPS << " " << bluePS << " setrgbcolor\n";

       m_currentRed = red;
       m_currentBlue = blue;
       m_currentGreen = green;
    }
}

void wxPostScriptDC::SetBrush( const wxBrush& brush )
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if (!brush.Ok()) return;
    
    m_brush = brush;

    // Brush colour
    unsigned char red = m_brush.GetColour ().Red ();
    unsigned char blue = m_brush.GetColour ().Blue ();
    unsigned char green = m_brush.GetColour ().Green ();

    if (!m_colour)
    {
        // Anything not black is white
        if (!(red == (unsigned char) 0 && blue == (unsigned char) 0
            && green == (unsigned char) 0))
        {
            red = (unsigned char) 255;
            green = (unsigned char) 255;
            blue = (unsigned char) 255;
        }
        
        // setgray here ?
    }

    if (!(red == m_currentRed && green == m_currentGreen && blue == m_currentBlue))
    {
       long redPS = (long) (((int) red) / 255.0);
       long bluePS = (long) (((int) blue) / 255.0);
       long greenPS = (long) (((int) green) / 255.0);
       *m_pstream << redPS << " " << greenPS << " " << bluePS << " setrgbcolor\n";
       m_currentRed = red;
       m_currentBlue = blue;
       m_currentGreen = green;
    }
}

void wxPostScriptDC::DrawText( const wxString& text, long x, long y, bool WXUNUSED(use16bit) )
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    SetFont( m_font );

    if (m_textForegroundColour.Ok ())
    {
        unsigned char red = m_textForegroundColour.Red ();
        unsigned char blue = m_textForegroundColour.Blue ();
        unsigned char green = m_textForegroundColour.Green ();

        if (!m_colour)
        {
          // Anything not white is black
          if (!(red == (unsigned char) 255 && blue == (unsigned char) 255
                && green == (unsigned char) 255))
            {
              red = (unsigned char) 0;
              green = (unsigned char) 0;
              blue = (unsigned char) 0;
            }
        }
        
        // maybe setgray here ?
        
        if (!(red == m_currentRed && green == m_currentGreen && blue == m_currentBlue))
        {
            long redPS = (long) (((int) red) / 255.0);
            long bluePS = (long) (((int) blue) / 255.0);
            long greenPS = (long) (((int) green) / 255.0);
            *m_pstream << redPS << " " << greenPS << " " << bluePS << " setrgbcolor\n";

            m_currentRed = red;
            m_currentBlue = blue;
            m_currentGreen = green;
        }
    }

    int size = m_font.GetPointSize();

    long by = y + (long)floor( float(size) * 2.0 / 3.0 ); // approximate baseline
    *m_pstream << XLOG2DEV(x) << " " << YLOG2DEV(by) << " moveto\n";
    
    *m_pstream << "(";
    int len = strlen ((char *)(const char *)text);
    int i;
    for (i = 0; i < len; i++)
    {
        int c = (unsigned char) text[i];
        if ( c == ')' || c == '(' || c == '\\')
        {
            *m_pstream << "\\" << (char) c;
        }
        else if ( c >= 128 )
        {
            // Cope with character codes > 127
            char tmp[5];
            sprintf(tmp, "\\%o", c);
            *m_pstream << tmp;
        }
        else
            *m_pstream << (char) c;
    }

    *m_pstream << ")" << " show\n";

    if (m_font.GetUnderlined())
    {
        long uy = (long)(y + size - m_underlinePosition);
        long w, h;
        GetTextExtent(text, &w, &h);
      
        *m_pstream << "gsave " << XLOG2DEV(x) << " " << YLOG2DEV(uy)
                   << " moveto\n"
                   << (long)m_underlineThickness << " setlinewidth "
                   << XLOG2DEV(x + w) << " " << YLOG2DEV(uy)
                   << " lineto stroke grestore\n";
    }
    
    CalcBoundingBox( x, y );
    CalcBoundingBox( x + size * text.Length() * 2/3 , y );
}


void wxPostScriptDC::SetBackground (const wxBrush& brush)
{
    m_backgroundBrush = brush;
}

void wxPostScriptDC::SetLogicalFunction (int WXUNUSED(function))
{
    wxFAIL_MSG( "wxPostScriptDC::SetLogicalFunction not implemented." );
}

void wxPostScriptDC::DrawSpline( wxList *points )
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    SetPen( m_pen );

    double a, b, c, d, x1, y1, x2, y2, x3, y3;
    wxPoint *p, *q;

    wxNode *node = points->First();
    p = (wxPoint *)node->Data();
    x1 = p->x; 
    y1 = p->y;

    node = node->Next();
    p = (wxPoint *)node->Data();
    c = p->x; 
    d = p->y;
    x3 = a = (double)(x1 + c) / 2;
    y3 = b = (double)(y1 + d) / 2;

    *m_pstream  << "newpath " 
                << XLOG2DEV((long)x1) << " " << YLOG2DEV((long)y1) << " moveto " 
                << XLOG2DEV((long)x3) << " " << YLOG2DEV((long)y3) << " lineto\n";
                
    CalcBoundingBox( (long)x1, (long)y1 );
    CalcBoundingBox( (long)x3, (long)y3 );

    while ((node = node->Next()) != NULL)
    {
        q = (wxPoint *)node->Data();

        x1 = x3; 
        y1 = y3;
        x2 = c;  
        y2 = d;
        c = q->x; 
        d = q->y;
        x3 = (double)(x2 + c) / 2;
        y3 = (double)(y2 + d) / 2;
        *m_pstream << XLOG2DEV((long)x1) << " " << YLOG2DEV((long)y1) << " " 
                   << XLOG2DEV((long)x2) << " " << YLOG2DEV((long)y2) << " "
                   << XLOG2DEV((long)x3) << " " << YLOG2DEV((long)y3) << " DrawSplineSection\n";

        CalcBoundingBox( (long)x1, (long)y1 );
        CalcBoundingBox( (long)x3, (long)y3 );
    }
    
/*
     At this point, (x2,y2) and (c,d) are the position of the
     next-to-last and last point respectively, in the point list
*/

    *m_pstream << XLOG2DEV((long)c) << " " << YLOG2DEV((long)d) << " lineto stroke\n";
}

long wxPostScriptDC::GetCharWidth ()
{
    // Chris Breeze: reasonable approximation using wxMODERN/Courier
    return (long) (GetCharHeight() * 72.0 / 120.0);
}


void wxPostScriptDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    m_signX = (xLeftRight ? 1 : -1);
    m_signY = (yBottomUp  ? 1 : -1);
    
    ComputeScaleAndOrigin();
}

void wxPostScriptDC::SetDeviceOrigin( long x, long y )
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    int h = 0;
    int w = 0;
    GetSize( &w, &h );
  
    wxDC::SetDeviceOrigin( x, h-y );
}

void wxPostScriptDC::GetSize(int* width, int* height) const
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    const char *paperType = wxThePrintSetupData->GetPaperName();
    
    if (!paperType) paperType = _("A4 210 x 297 mm");

    wxPrintPaperType *paper = wxThePrintPaperDatabase->FindPaperType(paperType);
    
    if (!paper) paper = wxThePrintPaperDatabase->FindPaperType(_("A4 210 x 297 mm"));
    
    if (paper)
    {
        if (width) *width = paper->widthPixels;
        if (height) *height = paper->heightPixels;
    }
    else
    {
        if (width) *width = 595;
        if (height) *height = 842;
    }
}

bool wxPostScriptDC::StartDoc (const wxString& message)
{
    wxCHECK_MSG( Ok(), FALSE, "invalid postscript dc" );
    
    if (m_filename == "")
    {
        m_filename = wxGetTempFileName("ps");
        wxThePrintSetupData->SetPrinterFile((char *)(const char *)m_filename);
        m_ok = TRUE;
    }
    else
    {
        wxThePrintSetupData->SetPrinterFile((char *)(const char *)m_filename);
    }

    m_pstream = new ofstream (wxThePrintSetupData->GetPrinterFile());
      
    if (!m_pstream || !m_pstream->good())
    {
        wxMessageBox (_("Cannot open file!"), _("Error"), wxOK);
        m_ok = FALSE;
        return FALSE;
    }
    
    m_ok = TRUE;

    SetBrush( *wxBLACK_BRUSH );
    SetPen( *wxBLACK_PEN );
    SetBackground( *wxWHITE_BRUSH );
    SetTextForeground( *wxBLACK );

    // set origin according to paper size
    SetDeviceOrigin( 0,0 );
    
    wxPageNumber = 1;
    m_pageNumber = 1;
    m_title = message;
    return TRUE;
}

void wxPostScriptDC::EndDoc ()
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    if (m_clipping)
    {
        m_clipping = FALSE;
        *m_pstream << "grestore\n";
    }

    if (m_pstream)
    {
        delete m_pstream;
        m_pstream = (ofstream *) NULL;
    }

    char *header_file = wxGetTempFileName("ps");
    
    m_pstream = new ofstream( header_file );

    *m_pstream << "%!PS-Adobe-2.0\n";   /* PostScript magic strings */
    *m_pstream << "%%Title: " << (const char *) m_title << "\n";
    *m_pstream << "%%Creator: " << wxTheApp->argv[0] << "\n";
    *m_pstream << "%%CreationDate: " << wxNow() << "\n";

    char userID[256];
    if ( wxGetEmailAddress(userID, sizeof(userID)) )
    {
        *m_pstream << "%%For: " << (char *)userID;
        char userName[245];
        if (wxGetUserName(userName, sizeof(userName)))
            *m_pstream << " (" << (char *)userName << ")";
        *m_pstream << "\n";
    }
    else if ( wxGetUserName(userID, sizeof(userID)) )
    {
        *m_pstream << "%%For: " << (char *)userID << "\n";
    }

    // THE FOLLOWING HAS BEEN CONTRIBUTED BY Andy Fyfe <andy@hyperparallel.com>

    long wx_printer_translate_x, wx_printer_translate_y;
    double wx_printer_scale_x, wx_printer_scale_y;
    wxThePrintSetupData->GetPrinterTranslation(&wx_printer_translate_x, &wx_printer_translate_y);
    wxThePrintSetupData->GetPrinterScaling(&wx_printer_scale_x, &wx_printer_scale_y);

    if (wxThePrintSetupData->GetPrinterOrientation() == PS_LANDSCAPE)
    {
        *m_pstream << "%%Orientation: Landscape\n";
    }
    else
    {
        *m_pstream << "%%Orientation: Portrait\n";
    }

    // Compute the bounding box.  Note that it is in the default user
    // coordinate system, thus we have to convert the values.
    long llx = (long) ((XLOG2DEV(m_minX)+wx_printer_translate_x)*wx_printer_scale_x);
    long lly = (long) ((YLOG2DEV(m_minY)+wx_printer_translate_y)*wx_printer_scale_y);
    long urx = (long) ((XLOG2DEV(m_maxX)+wx_printer_translate_x)*wx_printer_scale_x);
    long ury = (long) ((YLOG2DEV(m_maxY)+wx_printer_translate_y)*wx_printer_scale_y);

    // If we're landscape, our sense of "x" and "y" is reversed.
    if (wxThePrintSetupData->GetPrinterOrientation() == PS_LANDSCAPE)
    {
        long tmp;
        tmp = llx; llx = lly; lly = tmp;
        tmp = urx; urx = ury; ury = tmp;

        // We need either the two lines that follow, or we need to subtract
        // min_x from real_translate_y, which is commented out below.
        llx = llx - (long)(m_minX*wx_printer_scale_y);
        urx = urx - (long)(m_minX*wx_printer_scale_y);
    }

    // The Adobe specifications call for integers; we round as to make
    // the bounding larger.
    *m_pstream << "%%BoundingBox: "
               << floor((double)llx) << " " << floor((double)lly) << " "
               << ceil((double)urx)  << " " << ceil((double)ury)  << "\n";
    *m_pstream << "%%Pages: " << (wxPageNumber - 1) << "\n";
    *m_pstream << "%%EndComments\n\n";

    // To check the correctness of the bounding box, postscript commands
    // to draw a box corresponding to the bounding box are generated below.
    // But since we typically don't want to print such a box, the postscript
    // commands are generated within comments.  These lines appear before any
    // adjustment of scale, rotation, or translation, and hence are in the
    // default user coordinates.
    *m_pstream << "% newpath\n";
    *m_pstream << "% " << llx << " " << lly << " moveto\n";
    *m_pstream << "% " << urx << " " << lly << " lineto\n";
    *m_pstream << "% " << urx << " " << ury << " lineto\n";
    *m_pstream << "% " << llx << " " << ury << " lineto closepath stroke\n";

    *m_pstream << "%%BeginProlog\n";
    *m_pstream << wxPostScriptHeaderEllipse;
    *m_pstream << wxPostScriptHeaderEllipticArc;
    *m_pstream << wxPostScriptHeaderReencodeISO1;
    *m_pstream << wxPostScriptHeaderReencodeISO2;

    if (wxPostScriptHeaderSpline)
        *m_pstream << wxPostScriptHeaderSpline;
    *m_pstream << "%%EndProlog\n";

    delete m_pstream;
    m_pstream = (ofstream *) NULL;

    char *tmp_file = wxGetTempFileName("ps");

    // Paste header Before wx_printer_file
    wxConcatFiles (header_file, wxThePrintSetupData->GetPrinterFile(), tmp_file);
    wxRemoveFile (header_file);
    wxRemoveFile (wxThePrintSetupData->GetPrinterFile());
    wxRenameFile(tmp_file, wxThePrintSetupData->GetPrinterFile());

#if defined(__X__) || defined(__WXGTK__)
  if (m_ok)
    {
      switch (wxThePrintSetupData->GetPrinterMode()) {
        case PS_PREVIEW:
        {
          char *argv[3];
          argv[0] = wxThePrintSetupData->GetPrintPreviewCommand();
          argv[1] = wxThePrintSetupData->GetPrinterFile();
          argv[2] = (char *) NULL;
          wxExecute (argv, TRUE);
          wxRemoveFile(wxThePrintSetupData->GetPrinterFile());
        }
        break;

        case PS_PRINTER:
        {
          char *argv[4];
          int argc = 0;
          argv[argc++] = wxThePrintSetupData->GetPrinterCommand();

          // !SM! If we simply assign to argv[1] here, if printer options
          // are blank, we get an annoying and confusing message from lpr.
          char * opts = wxThePrintSetupData->GetPrinterOptions();
          if (opts && *opts)
              argv[argc++] = opts;

          argv[argc++] = wxThePrintSetupData->GetPrinterFile();
          argv[argc++] = (char *) NULL;
          wxExecute (argv, TRUE);
          wxRemoveFile(wxThePrintSetupData->GetPrinterFile());
        }
        break;

        case PS_FILE:
          break;
        }
    }
#endif
}

void wxPostScriptDC::StartPage ()
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    *m_pstream << "%%Page: " << (wxPageNumber++) << "\n";
    
//  *m_pstream << "matrix currentmatrix\n";

    // Added by Chris Breeze

        // Each page starts with an "initgraphics" which resets the
        // transformation and so we need to reset the origin
        // (and rotate the page for landscape printing)
        
/*
        m_scaleFactor = 1.0;
        m_logicalOriginX = 0;
        m_logicalOriginY = 0;
*/

        // Output scaling
        long translate_x, translate_y;
        double scale_x, scale_y;
        wxThePrintSetupData->GetPrinterTranslation(&translate_x, &translate_y);
        wxThePrintSetupData->GetPrinterScaling(&scale_x, &scale_y);

        if (wxThePrintSetupData->GetPrinterOrientation() == PS_LANDSCAPE)
        {
                translate_y -= m_maxY;
                *m_pstream << "90 rotate\n";
        }

        *m_pstream << scale_x << " " << scale_y << " scale\n";
        *m_pstream << translate_x << " " << translate_y << " translate\n";
}

void wxPostScriptDC::EndPage ()
{
    wxCHECK_RET( Ok(), "invalid postscript dc" );
    
    *m_pstream << "showpage\n";
}

bool wxPostScriptDC::Blit (long xdest, long ydest, long fwidth, long fheight,
      wxDC *source, long xsrc, long ysrc, int WXUNUSED(rop), bool WXUNUSED(useMask))
{
    wxCHECK_MSG( Ok(), FALSE, "invalid postscript dc" );
    
    return TRUE;
}

long wxPostScriptDC::GetCharHeight ()
{
    if (m_font.Ok())
        return  m_font.GetPointSize();
    else
        return 12;
}

void wxPostScriptDC::GetTextExtent (const wxString& string, long *x, long *y,
               long *descent, long *externalLeading, wxFont *theFont,
                                    bool WXUNUSED(use16))
{
//  if (!m_pstream) return;
  
  wxFont *fontToUse = theFont;
  
  if (!fontToUse) fontToUse = (wxFont*) &m_font;

#if !USE_AFM_FOR_POSTSCRIPT
  // Provide a VERY rough estimate (avoid using it)
        // Chris Breeze 5/11/97: produces accurate results for mono-spaced
        // font such as Courier (aka wxMODERN)
        int height = 12;
        if (fontToUse)
        {
                height = fontToUse->GetPointSize();
        }
        *x = strlen (string) * height * 72 / 120;
        *y = (long) (height * 1.32);    // allow for descender

  if (descent)
    *descent = 0;
  if (externalLeading)
    *externalLeading = 0;
#else
  // +++++ start of contributed code +++++

  // ************************************************************
  // method for calculating string widths in postscript:
  // read in the AFM (adobe font metrics) file for the
  // actual font, parse it and extract the character widths
  // and also the descender. this may be improved, but for now
  // it works well. the AFM file is only read in if the
  // font is changed. this may be chached in the future.
  // calls to GetTextExtent with the font unchanged are rather
  // efficient!!!
  //
  // for each font and style used there is an AFM file necessary.
  // currently i have only files for the roman font family.
  // i try to get files for the other ones!
  //
  // CAVE: the size of the string is currently always calculated
  //       in 'points' (1/72 of an inch). this should later on be
  //       changed to depend on the mapping mode.
  // CAVE: the path to the AFM files must be set before calling this
  //       function. this is usually done by a call like the following:
  //       wxSetAFMPath("d:\\wxw161\\afm\\");
  //
  // example:
  //
  //    wxPostScriptDC dc(NULL, TRUE);
  //    if (dc.Ok()){
  //      wxSetAFMPath("d:\\wxw161\\afm\\");
  //      dc.StartDoc("Test");
  //      dc.StartPage();
  //      long w,h;
  //      dc.SetFont(new wxFont(10, wxROMAN, wxNORMAL, wxNORMAL));
  //      dc.GetTextExtent("Hallo",&w,&h);
  //      dc.EndPage();
  //      dc.EndDoc();
  //    }
  //
  // by steve (stefan.hammes@urz.uni-heidelberg.de)
  // created: 10.09.94
  // updated: 14.05.95

  assert(fontToUse && "void wxPostScriptDC::GetTextExtent: no font defined");
  assert(x && "void wxPostScriptDC::GetTextExtent: x == NULL");
  assert(y && "void wxPostScriptDC::GetTextExtent: y == NULL");

  // these static vars are for storing the state between calls
  static int lastFamily= INT_MIN;
  static int lastSize= INT_MIN;
  static int lastStyle= INT_MIN;
  static int lastWeight= INT_MIN;
  static int lastDescender = INT_MIN;
  static int lastWidths[256]; // widths of the characters

  // get actual parameters
  const int Family = fontToUse->GetFamily();
  const int Size =   fontToUse->GetPointSize();
  const int Style =  fontToUse->GetStyle();
  const int Weight = fontToUse->GetWeight();

  // if we have another font, read the font-metrics
  if(Family!=lastFamily||Size!=lastSize||Style!=lastStyle||Weight!=lastWeight){
    // store actual values
    lastFamily = Family;
    lastSize =   Size;
    lastStyle =  Style;
    lastWeight = Weight;

    // read in new font metrics **************************************

    // 1. construct filename ******************************************
    /* MATTHEW: [2] Use wxTheFontNameDirectory */
    const char *name;

        // Julian - we'll need to do this a different way now we've removed the
        // font directory system. Must find Stefan's original code.

    name = wxTheFontNameDirectory->GetAFMName(Family, Weight, Style);
    if (!name)
      name = "unknown";

    // get the directory of the AFM files
    char afmName[256];
    afmName[0] = 0;
    if (wxGetAFMPath())
      strcpy(afmName,wxGetAFMPath());

    // 2. open and process the file **********************************

    // a short explanation of the AFM format:
    // we have for each character a line, which gives its size
    // e.g.:
    //
    //   C 63 ; WX 444 ; N question ; B 49 -14 395 676 ;
    //
    // that means, we have a character with ascii code 63, and width
    // (444/1000 * fontSize) points.
    // the other data is ignored for now!
    //
    // when the font has changed, we read in the right AFM file and store the
    // character widths in an array, which is processed below (see point 3.).

        // new elements JC Sun Aug 25 23:21:44 MET DST 1996


    strcat(afmName,name);
    strcat(afmName,".afm");
    FILE *afmFile = fopen(afmName,"r");
    if(afmFile==NULL){
      wxDebugMsg("GetTextExtent: can't open AFM file '%s'\n",afmName);
      wxDebugMsg("               using approximate values\n");
      int i;
      for (i=0; i<256; i++) lastWidths[i] = 500; // an approximate value
      lastDescender = -150; // dito.
    }else{
      int i;
      // init the widths array
      for(i=0; i<256; i++) lastWidths[i]= INT_MIN;
      // some variables for holding parts of a line
      char cString[10],semiString[10],WXString[10],descString[20];
      char upString[30], utString[30], encString[50];
      char line[256];
      int ascii,cWidth;
      // read in the file and parse it
      while(fgets(line,sizeof(line),afmFile)!=NULL){
        // A.) check for descender definition
        if(strncmp(line,"Descender",9)==0){
          if((sscanf(line,"%s%d",descString,&lastDescender)!=2)
             || (strcmp(descString,"Descender")!=0)) {
            wxDebugMsg("AFM-file '%s': line '%s' has error (bad descender)\n",
                       afmName,line);
          }
        }
            // JC 1.) check for UnderlinePosition
        else if(strncmp(line,"UnderlinePosition",17)==0){
          if((sscanf(line,"%s%lf",upString,&UnderlinePosition)!=2)
             || (strcmp(upString,"UnderlinePosition")!=0)) {
            wxDebugMsg("AFM-file '%s': line '%s' has error (bad UnderlinePosition)\n",
                       afmName,line);
          }
        }
        // JC 2.) check for UnderlineThickness
        else if(strncmp(line,"UnderlineThickness",18)==0){
           if((sscanf(line,"%s%lf",utString,&UnderlineThickness)!=2)
             || (strcmp(utString,"UnderlineThickness")!=0)) {
            wxDebugMsg("AFM-file '%s': line '%s' has error (bad UnderlineThickness)\n",
                       afmName,line);
          }
        }
        // JC 3.) check for EncodingScheme
        else if(strncmp(line,"EncodingScheme",14)==0){
          if((sscanf(line,"%s%s",utString,encString)!=2)
             || (strcmp(utString,"EncodingScheme")!=0)) {
            wxDebugMsg("AFM-file '%s': line '%s' has error (bad EncodingScheme)\n",
                       afmName,line);
          }
          else if (strncmp(encString, "AdobeStandardEncoding", 21))
          {
            wxDebugMsg("AFM-file '%s': line '%s' has error (unsupported EncodingScheme %s)\n",
                       afmName,line, encString);
          }
        }
            // B.) check for char-width
        else if(strncmp(line,"C ",2)==0){
          if(sscanf(line,"%s%d%s%s%d",
              cString,&ascii,semiString,WXString,&cWidth)!=5){
             wxDebugMsg("AFM-file '%s': line '%s' has an error (bad character width)\n",afmName,line);
          }
          if(strcmp(cString,"C")!=0 || strcmp(semiString,";")!=0 ||
             strcmp(WXString,"WX")!=0){
             wxDebugMsg("AFM-file '%s': line '%s' has a format error\n",afmName,line);
          }
          //printf("            char '%c'=%d has width '%d'\n",ascii,ascii,cWidth);
          if(ascii>=0 && ascii<256){
            lastWidths[ascii] = cWidth; // store width
          }else{
            /* MATTHEW: this happens a lot; don't print an error */
            // wxDebugMsg("AFM-file '%s': ASCII value %d out of range\n",afmName,ascii);
          }
        }
        // C.) ignore other entries.
      }
      fclose(afmFile);
    }
        // hack to compute correct values for german 'Umlaute'
        // the correct way would be to map the character names
        // like 'adieresis' to corresp. positions of ISOEnc and read
        // these values from AFM files, too. Maybe later ...
    lastWidths[196] = lastWidths['A'];  // Ä
    lastWidths[228] = lastWidths['a'];  // ä
    lastWidths[214] = lastWidths['O'];  // Ö
    lastWidths[246] = lastWidths['o'];  // ö
    lastWidths[220] = lastWidths['U'];  // Ü
    lastWidths[252] = lastWidths['u'];  // ü
    lastWidths[223] = lastWidths[251];  // ß
  }

      // JC: calculate UnderlineThickness/UnderlinePosition
  m_underlinePosition = m_underlinePosition * fontToUse->GetPointSize() / 1000.0f;
  m_underlineThickness = m_underlineThickness * fontToUse->GetPointSize() / 1000.0f * m_scaleFactor;

  // 3. now the font metrics are read in, calc size *******************
  // this is done by adding the widths of the characters in the
  // string. they are given in 1/1000 of the size!

  long widthSum=0;
  long height=Size; // by default
  unsigned char *p;
  for(p=(unsigned char *)(const char *)string; *p; p++){
    if(lastWidths[*p]== INT_MIN){
      wxDebugMsg("GetTextExtent: undefined width for character '%c' (%d)\n",
                 *p,*p);
      widthSum += (long)(lastWidths[' ']/1000.0F * Size); // assume space
    }else{
      widthSum += (long)((lastWidths[*p]/1000.0F)*Size);
    }
  }
  // add descender to height (it is usually a negative value)
  if(lastDescender!=INT_MIN){
    height += (long)(((-lastDescender)/1000.0F) * Size); /* MATTHEW: forgot scale */
  }

  // return size values
  *x = widthSum;
  *y = height;

  // return other parameters
  if (descent){
    if(lastDescender!=INT_MIN){
      *descent = (long)(((-lastDescender)/1000.0F) * Size); /* MATTHEW: forgot scale */
    }else{
      *descent = 0;
    }
  }

  // currently no idea how to calculate this!
  // if (externalLeading) *externalLeading = 0;
  if (externalLeading)
    *externalLeading = 0;

  // ----- end of contributed code -----
#endif
}

void wxPostScriptDC::GetSizeMM(long *width, long *height) const
{
    const char *paperType = wxThePrintSetupData->GetPaperName();
  
    if (!paperType) paperType = _("A4 210 x 297 mm");

    wxPrintPaperType *paper = wxThePrintPaperDatabase->FindPaperType(paperType);
    
    if (!paper) paper = wxThePrintPaperDatabase->FindPaperType(_("A4 210 x 297 mm"));
    
    if (paper)
    {
        if (width) *width = paper->widthMM;
        if (height) *height = paper->heightMM;
    }
    else
    {
       if (width) *width = 210;
       if (height) *height = 297;
    }
}