src/common/dcsvg.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        svg.cpp
   3 // Purpose:     SVG sample
   4 // Author:      Chris Elliott
   5 // Modified by:
   6 // RCS-ID:      $Id$
   7 // Licence:     wxWindows license
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 // For compilers that support precompilation, includes "wx/wx.h".
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15 #pragma hdrstop
  16 #endif
  17
  18 #ifndef WX_PRECOMP
  19 #include "wx/wx.h"
  20 #endif
  21
  22 #include "wx/svg/dcsvg.h"
  23
  24 #include <math.h>
  25 #include "wx/image.h"
  26
  27 #define wxSVG_DEBUG FALSE
  28 // or TRUE to see the calls being executed
  29 #define newline    wxString(wxT("\n"))
  30 #define space      wxString(wxT(" "))
  31 #define semicolon  wxString(wxT(";"))
  32 #define     wx_round(a)    (int)((a)+.5)
  33
  34 #ifdef __BORLANDC__
  35 #pragma warn -rch
  36 #pragma warn -ccc
  37 #endif
  38
  39 static inline double DegToRad(double deg) { return (deg * 3.14) / 180.0; } ;
  40
  41 wxString wxColStr ( wxColour c )
  42 {
  43     unsigned char r, g, b ;
  44     r = c.Red ();
  45     g = c.Green ();
  46     b = c. Blue ();
  47
  48     // possible Unicode bug here
  49     wxString s = wxDecToHex(r) + wxDecToHex(g) + wxDecToHex(b) ;
  50     return s ;
  51 }
  52
  53
  54 wxString wxBrushString ( wxColour c, int style )
  55 {
  56     wxString s = wxT("fill:#") + wxColStr (c)  + semicolon + space ;
  57     switch ( style )
  58     {
  59         case wxSOLID :
  60             s = s + wxT("fill-opacity:1.0; ");
  61             break ;
  62         case wxTRANSPARENT:
  63             s = s + wxT("fill-opacity:0.0; ");
  64             break ;
  65
  66         default :
  67             wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::Requested Brush Style not available")) ;
  68
  69     }
  70     s = s + newline ;
  71     return s ;
  72 }
  73
  74
  75 void wxSVGFileDC::Init (wxString f, int Width, int Height, float dpi)
  76
  77 {
  78     //set up things first  wxDCBase does all this?
  79     m_width = Width ;
  80     m_height = Height ;
  81
  82     m_clipping = FALSE;
  83     m_OK = TRUE;
  84
  85     m_mm_to_pix_x = dpi/25.4;
  86     m_mm_to_pix_y = dpi/25.4;
  87
  88     m_signX = m_signY = 1;
  89
  90     m_userScaleX = m_userScaleY =
  91         m_deviceOriginX = m_deviceOriginY = 0;
  92
  93     m_OriginX = m_OriginY = 0;
  94     m_logicalOriginX = m_logicalOriginY = 0;
  95     m_logicalScaleX = m_logicalScaleY = 0 ;
  96     m_scaleX = m_scaleY = 1.0 ;
  97
  98     m_logicalFunction = wxCOPY;
  99     m_backgroundMode = wxTRANSPARENT;
 100     m_mappingMode = wxMM_TEXT;
 101
 102     m_backgroundBrush = *wxTRANSPARENT_BRUSH;
 103     m_textForegroundColour = *wxBLACK;
 104     m_textBackgroundColour = *wxWHITE;
 105     m_colour = wxColourDisplay();
 106
 107     m_pen   = *wxBLACK_PEN;
 108     m_font  = *wxNORMAL_FONT;
 109     m_brush = *wxWHITE_BRUSH;
 110
 111     m_graphics_changed = TRUE ;
 112
 113     ////////////////////code here
 114
 115     m_outfile = new wxFileOutputStream(f) ;
 116     m_OK = m_outfile->Ok ();
 117     if (m_OK)
 118     {
 119         m_filename = f ;
 120         m_sub_images = 0 ;
 121         wxString s ;
 122         s = wxT("<?xml version=\"1.0\" standalone=\"no\"?>") ; s = s + newline ;
 123         m_outfile->Write (s.c_str(), s.Len() ) ;
 124         s = wxT("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\" ") + newline ;
 125         m_outfile->Write (s.c_str(), s.Len() ) ;
 126         s = wxT("\"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\"> ")+ newline ;
 127         m_outfile->Write (s.c_str(), s.Len() ) ;
 128         s.Printf ( wxT("<svg width=\"%.2gcm\" height=\"%.2gcm\" viewBox=\"0 0 %d %d \"> \n"), float(Width)/dpi*2.54, float(Height)/dpi*2.54, Width, Height );
 129         m_outfile->Write (s.c_str(), s.Len() ) ;
 130         s = wxT("<title>SVG Picture created as ") + wxFileNameFromPath(f) + wxT(" </title>") + newline ;
 131         m_outfile->Write (s.c_str(), s.Len() ) ;
 132         s = wxString (wxT("<desc>Picture generated by wxSVG ")) + wxSVGVersion + wxT(" </desc>")+ newline ;
 133         m_outfile->Write (s.c_str(), s.Len() ) ;
 134         s =  wxT("<g style=\"fill:black; stroke:black; stroke-width:1\">") + newline ;
 135         m_outfile->Write (s.c_str(), s.Len() ) ;
 136
 137     }
 138     m_OK = m_outfile->Ok ();
 139 }
 140
 141
 142 // constructors
 143 wxSVGFileDC::wxSVGFileDC (wxString f)
 144 {
 145     // quarter 640x480 screen display at 72 dpi
 146     Init (f,320,240,72.0);
 147 };
 148
 149 wxSVGFileDC::wxSVGFileDC (wxString f, int Width, int Height)
 150 {
 151     Init (f,Width,Height,72.0);
 152 };
 153
 154 wxSVGFileDC::wxSVGFileDC (wxString f, int Width, int Height, float dpi)
 155 {
 156     Init (f,Width,Height,dpi);
 157 };
 158
 159 wxSVGFileDC::~wxSVGFileDC()
 160 {
 161     wxString s = wxT("</g> \n</svg> \n") ;
 162     m_outfile->Write (s.c_str(), s.Len() ) ;
 163     m_OK = m_outfile->Ok ();
 164     delete m_outfile ;
 165 }
 166
 167
 168 //////////////////////////////////////////////////////////////////////////////////////////
 169
 170 void wxSVGFileDC::DoDrawLine (wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 171 {
 172     if (m_graphics_changed) NewGraphics ();
 173     wxString s ;
 174     s.Printf ( wxT("<path d=\"M%d %d L%d %d\" /> \n"), x1,y1,x2,y2 );
 175     if (m_OK)
 176     {
 177         m_outfile->Write (s.c_str(), s.Len() ) ;
 178     }
 179     m_OK = m_outfile->Ok ();
 180     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawLine Call executed")) ;
 181     CalcBoundingBox(x1, y1) ;
 182     CalcBoundingBox(x2, y2) ;
 183     return;
 184 };
 185
 186 void wxSVGFileDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset , wxCoord yoffset )
 187 {
 188     for ( int i = 1; i < n ; i++ )
 189     {
 190         DoDrawLine ( points [i-1].x + xoffset, points [i-1].y + yoffset,
 191             points [ i ].x + xoffset, points [ i ].y + yoffset ) ;
 192     }
 193 }
 194
 195
 196 void wxSVGFileDC::DoDrawPoint (wxCoord x1, wxCoord y1)
 197 {
 198     wxString s;
 199     if (m_graphics_changed) NewGraphics ();
 200     s = wxT("<g style = \"stroke-linecap:round;\" > ") + newline ;
 201     m_outfile->Write (s.c_str(), s.Len() ) ;
 202     DrawLine ( x1,y1,x1,y1 );
 203     s = wxT("</g>");
 204     m_outfile->Write (s.c_str(), s.Len() ) ;
 205     m_OK = m_outfile->Ok ();
 206 }
 207
 208
 209 void wxSVGFileDC::DoDrawCheckMark(wxCoord x1, wxCoord y1, wxCoord width, wxCoord height)
 210 {
 211     wxDCBase::DoDrawCheckMark (x1,y1,width,height) ;
 212 }
 213
 214
 215 void wxSVGFileDC::DoDrawText(const wxString& text, wxCoord x1, wxCoord y1)
 216 {
 217     DoDrawRotatedText(text, x1,y1,0.0);
 218     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawText Call executed")) ;
 219 }
 220
 221
 222 void wxSVGFileDC::DoDrawRotatedText(const wxString& sText, wxCoord x, wxCoord y, double angle)
 223 {
 224     //known bug; if the font is drawn in a scaled DC, it will not behave exactly as wxMSW
 225     if (m_graphics_changed) NewGraphics ();
 226     wxString s, sTmp;
 227
 228     // calculate bounding box
 229     wxCoord w, h, desc ;
 230     DoGetTextExtent(sText, &w, &h, &desc);
 231
 232     double rad = DegToRad(angle);
 233
 234     // wxT("upper left") and wxT("upper right")
 235     CalcBoundingBox(x, y);
 236     CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
 237
 238     // wxT("bottom left") and wxT("bottom right")
 239     x += (wxCoord)(h*sin(rad));
 240     y += (wxCoord)(h*cos(rad));
 241     CalcBoundingBox(x, y);
 242     CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
 243
 244     if (m_backgroundMode == wxSOLID)
 245     {
 246         // draw background first
 247         // just like DoDrawRectangle except we pass the text color to it and set the border to a 1 pixel wide text background
 248
 249         wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::Draw Rotated Text Call plotting text background")) ;
 250         sTmp.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\"  "), x,y+desc-h, w, h );
 251         s = sTmp + wxT("style=\"fill:#") + wxColStr (m_textBackgroundColour) + wxT("; ") ;
 252         s = s + wxT("stroke-width:1; stroke:#") + wxColStr (m_textBackgroundColour) + wxT("; ") ;
 253         sTmp.Printf ( wxT("\" transform=\"rotate( %.2g %d %d )  \">"), -angle, x,y ) ;
 254         s = s + sTmp + newline ;
 255         m_outfile->Write (s.c_str(), s.Len() ) ;
 256     }
 257     //now do the text itself
 258     s.Printf (wxT(" <text x=\"%d\" y=\"%d\" "),x,y );
 259
 260     sTmp = m_font.GetFaceName () ;
 261     if (sTmp.Len () > 0)  s = s + wxT("style=\"font-family:") + sTmp + wxT("; ");
 262     else s = s + wxT("style=\" ") ;
 263
 264     wxString fontweights [3] = { wxT("normal"), wxT("lighter"), wxT("bold") };
 265     s = s + wxT("font-weight:") + fontweights[m_font.GetWeight() - wxNORMAL] + semicolon + space;
 266
 267     wxString fontstyles [5] = { wxT("normal"), wxT("style error"), wxT("style error"), wxT("italic"), wxT("oblique") };
 268     s = s + wxT("font-style:") + fontstyles[m_font.GetStyle() - wxNORMAL] + semicolon  + space;
 269
 270     sTmp.Printf (wxT("font-size:%dpt; fill:#"), m_font.GetPointSize () );
 271     s = s + sTmp ;
 272     s = s + wxColStr (m_textForegroundColour) + wxT("; stroke:#") + wxColStr (m_textForegroundColour) + wxT("; ") ;
 273     sTmp.Printf ( wxT("stroke-width:0;\"  transform=\"rotate( %.2g %d %d )  \" >"),  -angle, x,y ) ;
 274     s = s + sTmp + sText + wxT("</text> ") + newline ;
 275     if (m_OK)
 276     {
 277         m_outfile->Write (s.c_str(), s.Len() ) ;
 278     }
 279     m_OK = m_outfile->Ok ();
 280     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawRotatedText Call executed")) ;
 281
 282 }
 283
 284
 285 void wxSVGFileDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 286 {
 287     DoDrawRoundedRectangle(x, y, width, height, 0)  ;
 288 }
 289
 290
 291 void wxSVGFileDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
 292
 293 {
 294     if (m_graphics_changed) NewGraphics ();
 295     wxString s ;
 296
 297     s.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" rx=\"%.2g\" "),
 298                x, y, width, height, radius );
 299
 300     s = s + wxT(" /> ") + newline ;
 301     m_outfile->Write (s.c_str(), s.Len() ) ;
 302     m_OK = m_outfile->Ok ();
 303
 304     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawRoundedRectangle Call executed")) ;
 305     CalcBoundingBox(x, y) ;
 306     CalcBoundingBox(x + width, y + height) ;
 307
 308 }
 309
 310
 311 void wxSVGFileDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
 312 {
 313     if (m_graphics_changed) NewGraphics ();
 314     wxString s, sTmp ;
 315     s = wxT("<polygon style=\"") ;
 316     if ( fillStyle == wxODDEVEN_RULE )
 317         s = s + wxT("fill-rule:evenodd; ");
 318     else
 319         s = s + wxT("fill-rule:nonzero; ");
 320
 321     s = s  + wxT("\" \npoints=\"") ;
 322
 323     for (int i = 0; i < n;  i++)
 324     {
 325         sTmp.Printf ( wxT("%d,%d"), points [i].x+xoffset, points[i].y+yoffset );
 326         s = s + sTmp + newline ;
 327         CalcBoundingBox ( points [i].x+xoffset, points[i].y+yoffset);
 328     }
 329     s = s + wxT("\" /> ") ;
 330     s = s + newline ;
 331     m_outfile->Write (s.c_str(), s.Len() ) ;
 332     m_OK = m_outfile->Ok ();
 333
 334     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawPolygon Call executed")) ;
 335 }
 336
 337
 338 void wxSVGFileDC::DoDrawEllipse (wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 339
 340 {
 341     if (m_graphics_changed) NewGraphics ();
 342
 343     int rh = height /2 ;
 344     int rw = width  /2 ;
 345
 346     wxString s;
 347     s.Printf ( wxT("<ellipse cx=\"%d\" cy=\"%d\" rx=\"%d\" ry=\"%d\" "), x+rw,y+rh, rw, rh );
 348     s = s + wxT(" /> ") + newline ;
 349
 350     m_outfile->Write (s.c_str(), s.Len() ) ;
 351     m_OK = m_outfile->Ok ();
 352
 353     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawEllipse Call executed")) ;
 354     CalcBoundingBox(x, y) ;
 355     CalcBoundingBox(x + width, y + height) ;
 356 }
 357
 358
 359 void wxSVGFileDC::DoDrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc, wxCoord yc)
 360 {
 361     /* Draws an arc of a circle, centred on (xc, yc), with starting point
 362     (x1, y1) and ending at (x2, y2). The current pen is used for the outline
 363     and the current brush for filling the shape.
 364
 365     The arc is drawn in an anticlockwise direction from the start point to
 366     the end point.
 367
 368     Might be better described as Pie drawing */
 369
 370     if (m_graphics_changed) NewGraphics ();
 371     wxString s ;
 372
 373     // we need the radius of the circle which has two estimates
 374     double r1 = sqrt ( double( (x1-xc)*(x1-xc) ) + double( (y1-yc)*(y1-yc) ) );
 375     double r2 = sqrt ( double( (x2-xc)*(x2-xc) ) + double( (y2-yc)*(y2-yc) ) );
 376
 377     wxASSERT_MSG( (fabs ( r2-r1 ) <= 3), wxT("wxSVGFileDC::DoDrawArc Error in getting radii of circle")) ;
 378     if ( fabs ( r2-r1 ) > 3 )    //pixels
 379     {
 380         s = wxT("<!--- wxSVGFileDC::DoDrawArc Error in getting radii of circle --> \n") ;
 381         m_outfile->Write (s.c_str(), s.Len() ) ;
 382     }
 383
 384     double theta1 = atan2(yc-y1,x1-xc);
 385     if ( theta1 < 0 ) theta1 = theta1 + 3.14 * 2;
 386     double theta2 = atan2(yc-y2, x2-xc);
 387     if ( theta2 < 0 ) theta2 = theta2 + 3.14 * 2;
 388     if ( theta2 < theta1 ) theta2 = theta2 + 3.14 *2 ;
 389
 390     int fArc  ;                  // flag for large or small arc 0 means less than 180 degrees
 391     if (  fabs((theta2 - theta1) > 3.14 )) fArc = 1; else fArc = 0 ;
 392
 393     int fSweep = 0 ;             // flag for sweep always 0
 394
 395     s.Printf ( wxT("<path d=\"M%d %d A%.2g %.2g 0.0 %d %d %d %d L%d %d z "),
 396         x1,y1, r1, r2, fArc, fSweep, x2, y2, xc, yc );
 397
 398     // the z means close the path and fill
 399     s = s + wxT(" \" /> ") + newline ;
 400
 401
 402     if (m_OK)
 403     {
 404         m_outfile->Write (s.c_str(), s.Len() ) ;
 405     }
 406     m_OK = m_outfile->Ok ();
 407
 408     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawArc Call executed")) ;
 409 }
 410
 411
 412 void wxSVGFileDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
 413 {
 414     /*
 415     Draws an arc of an ellipse. The current pen is used for drawing the arc
 416     and the current brush is used for drawing the pie. This function is
 417     currently only available for X window and PostScript device contexts.
 418
 419     x and y specify the x and y coordinates of the upper-left corner of the
 420     rectangle that contains the ellipse.
 421
 422     width and height specify the width and height of the rectangle that
 423     contains the ellipse.
 424
 425     start and end specify the start and end of the arc relative to the
 426     three-o'clock position from the center of the rectangle. Angles are
 427     specified in degrees (360 is a complete circle). Positive values mean
 428     counter-clockwise motion. If start is equal to end, a complete ellipse
 429     will be drawn. */
 430
 431     //known bug: SVG draws with the current pen along the radii, but this does not happen in wxMSW
 432
 433     if (m_graphics_changed) NewGraphics ();
 434
 435     wxString s ;
 436     //radius
 437     double rx = w / 2 ;
 438     double ry = h / 2 ;
 439     // center
 440     double xc = x + rx ;
 441     double yc = y + ry ;
 442
 443     double xs, ys, xe, ye ;
 444     xs = xc + rx * cos (DegToRad(sa)) ;
 445     xe = xc + rx * cos (DegToRad(ea)) ;
 446     ys = yc - ry * sin (DegToRad(sa)) ;
 447     ye = yc - ry * sin (DegToRad(ea)) ;
 448
 449     ///now same as circle arc...
 450
 451     double theta1 = atan2(ys-yc, xs-xc);
 452     double theta2 = atan2(ye-yc, xe-xc);
 453
 454     int fArc  ;                  // flag for large or small arc 0 means less than 180 degrees
 455     if ( (theta2 - theta1) > 0 ) fArc = 1; else fArc = 0 ;
 456
 457     int fSweep ;
 458     if ( fabs( (theta2 - theta1) > 3.14)) fSweep = 1; else fSweep = 0 ;
 459
 460     s.Printf ( wxT("<path d=\"M%d %d A%d %d 0.0 %d %d  %d %d L %d %d z "),
 461         int(xs), int(ys), int(rx), int(ry),
 462         fArc, fSweep, int(xe), int(ye), int(xc), int(yc)  );
 463
 464
 465     s = s + wxT(" \" /> ") + newline ;
 466
 467     if (m_OK)
 468     {
 469         m_outfile->Write (s.c_str(), s.Len() ) ;
 470     }
 471     m_OK = m_outfile->Ok ();
 472
 473     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawEllipticArc Call executed")) ;
 474 }
 475
 476
 477 void wxSVGFileDC::DoGetTextExtent(const wxString& string, wxCoord *w, wxCoord *h, wxCoord *descent , wxCoord *externalLeading , wxFont *font) const
 478
 479 {
 480     wxScreenDC sDC ;
 481
 482     sDC.SetFont (m_font);
 483     if ( font != NULL ) sDC.SetFont ( *font );
 484     sDC.GetTextExtent(string, w,  h, descent, externalLeading );
 485     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetTextExtent Call executed")) ;
 486 }
 487
 488
 489 wxCoord wxSVGFileDC::GetCharHeight() const
 490
 491 {
 492     wxScreenDC sDC ;
 493     sDC.SetFont (m_font);
 494
 495     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetCharHeight Call executing")) ;
 496     return ( sDC.GetCharHeight() );
 497
 498 }
 499
 500
 501 wxCoord wxSVGFileDC::GetCharWidth() const
 502 {
 503     wxScreenDC sDC ;
 504     sDC.SetFont (m_font);
 505
 506     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetCharWidth Call executing")) ;
 507     return ( sDC.GetCharWidth() ) ;
 508
 509 }
 510
 511
 512 /// Set Functions /////////////////////////////////////////////////////////////////
 513 void wxSVGFileDC::SetBackground( const wxBrush &brush )
 514 {
 515
 516     m_backgroundBrush = brush;
 517     return;
 518 }
 519
 520
 521 void wxSVGFileDC::SetBackgroundMode( int mode )
 522 {
 523     m_backgroundMode = mode;
 524     return;
 525 }
 526
 527
 528 void wxSVGFileDC::SetBrush(const wxBrush& brush)
 529
 530 {
 531     m_brush = brush ;
 532
 533     m_graphics_changed = TRUE ;
 534     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetBrush Call executed")) ;
 535 }
 536
 537
 538 void wxSVGFileDC::SetPen(const wxPen& pen)
 539 {
 540     // width, color, ends, joins : currently implemented
 541     // dashes, stipple :  not implemented
 542     m_pen = pen ;
 543
 544     m_graphics_changed = TRUE ;
 545     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetPen Call executed")) ;
 546 }
 547
 548 void wxSVGFileDC::NewGraphics ()
 549 {
 550
 551     int w = m_pen.GetWidth ();
 552     wxColour c = m_pen.GetColour () ;
 553
 554     wxString s, sBrush, sPenCap, sPenJoin, sPenStyle, sLast, sWarn;
 555
 556     sBrush = wxT("</g>\n<g style=\"") + wxBrushString ( m_brush.GetColour (), m_brush.GetStyle () )
 557         + wxT("  stroke:#") + wxColStr (c) + wxT("; ") ;
 558
 559     switch ( m_pen.GetCap () )
 560     {
 561         case  wxCAP_PROJECTING :
 562             sPenCap = wxT("stroke-linecap:square; ") ;
 563             break ;
 564         case  wxCAP_BUTT :
 565             sPenCap = wxT("stroke-linecap:butt; ") ;
 566             break ;
 567         case    wxCAP_ROUND :
 568         default :
 569             sPenCap = wxT("stroke-linecap:round; ") ;
 570     };
 571     switch ( m_pen.GetJoin () )
 572     {
 573         case  wxJOIN_BEVEL :
 574             sPenJoin = wxT("stroke-linejoin:bevel; ") ;
 575             break ;
 576         case  wxJOIN_MITER :
 577             sPenJoin = wxT("stroke-linejoin:miter; ") ;
 578             break ;
 579         case    wxJOIN_ROUND :
 580         default :
 581             sPenJoin = wxT("stroke-linejoin:round; ") ;
 582     };
 583
 584     switch ( m_pen.GetStyle () )
 585     {
 586         case  wxSOLID :
 587             sPenStyle = wxT("stroke-opacity:1.0; stroke-opacity:1.0; ") ;
 588             break ;
 589         case  wxTRANSPARENT :
 590             sPenStyle = wxT("stroke-opacity:0.0; stroke-opacity:0.0; ") ;
 591             break ;
 592         default :
 593             wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::SetPen Call called to set a Style which is not available")) ;
 594             sWarn = sWarn + wxT("<!--- wxSVGFileDC::SetPen Call called to set a Style which is not available --> \n") ;
 595     }
 596
 597     sLast.Printf (   wxT("stroke-width:%d\" \n   transform=\"translate(%.2g %.2g) scale(%.2g %.2g)\">"),
 598                   w, m_OriginX, m_OriginY, m_scaleX, m_scaleY  );
 599
 600     s = sBrush + sPenCap + sPenJoin + sPenStyle + sLast + newline + sWarn;
 601     m_outfile->Write (s.c_str(), s.Len() ) ;
 602     m_OK = m_outfile->Ok ();
 603     m_graphics_changed = FALSE ;
 604     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::NewGraphics Call executed")) ;
 605 }
 606
 607
 608 void wxSVGFileDC::SetFont(const wxFont& font)
 609
 610 {
 611     m_font = font ;
 612
 613     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetFont Call executed")) ;
 614 }
 615
 616
 617 void wxSVGFileDC::ComputeScaleAndOrigin()
 618 {
 619     m_scaleX = m_logicalScaleX * m_userScaleX;
 620     m_scaleY = m_logicalScaleY * m_userScaleY;
 621     m_OriginX = m_logicalOriginX * m_logicalScaleX + m_deviceOriginX ;
 622     m_OriginY = m_logicalOriginY * m_logicalScaleY + m_deviceOriginY ;
 623     m_graphics_changed = TRUE;
 624 }
 625
 626
 627 int wxSVGFileDC::GetMapMode()
 628 {
 629     return m_mappingMode ;
 630 }
 631
 632
 633 void wxSVGFileDC::SetMapMode( int mode )
 634 {
 635     switch (mode)
 636     {
 637         case wxMM_TWIPS:
 638             SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
 639             break;
 640         case wxMM_POINTS:
 641             SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
 642             break;
 643         case wxMM_METRIC:
 644             SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
 645             break;
 646         case wxMM_LOMETRIC:
 647             SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
 648             break;
 649         default:
 650         case wxMM_TEXT:
 651             SetLogicalScale( 1.0, 1.0 );
 652             break;
 653     }
 654     m_mappingMode = mode;
 655
 656     /*  we don't do this mega optimisation
 657         if (mode != wxMM_TEXT)
 658         {
 659             m_needComputeScaleX = TRUE;
 660             m_needComputeScaleY = TRUE;
 661         }
 662     */
 663 }
 664
 665
 666 void wxSVGFileDC::GetUserScale(double *x, double *y) const
 667 {
 668     *x = m_userScaleX ;
 669     *y = m_userScaleY ;
 670 }
 671
 672
 673 void wxSVGFileDC::SetUserScale( double x, double y )
 674 {
 675     // allow negative ? -> no
 676     m_userScaleX = x;
 677     m_userScaleY = y;
 678     ComputeScaleAndOrigin();
 679 }
 680
 681
 682 void wxSVGFileDC::SetLogicalScale( double x, double y )
 683 {
 684     // allow negative ?
 685     m_logicalScaleX = x;
 686     m_logicalScaleY = y;
 687     ComputeScaleAndOrigin();
 688 }
 689
 690
 691 void wxSVGFileDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 692 {
 693     // is this still correct ?
 694     m_logicalOriginX = x * m_signX;
 695     m_logicalOriginY = y * m_signY;
 696     ComputeScaleAndOrigin();
 697 }
 698
 699
 700 void wxSVGFileDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 701 {
 702     // only wxPostScripDC has m_signX = -1,
 703     m_deviceOriginX = x;
 704     m_deviceOriginY = y;
 705     ComputeScaleAndOrigin();
 706 }
 707
 708
 709 void wxSVGFileDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 710 {
 711     // only wxPostScripDC has m_signX = -1,
 712     m_signX = (xLeftRight ?  1 : -1);
 713     m_signY = (yBottomUp  ? -1 :  1);
 714     ComputeScaleAndOrigin();
 715 }
 716
 717
 718 // export a bitmap as a raster image in png
 719 bool wxSVGFileDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 720                          wxDC* source, wxCoord xsrc, wxCoord ysrc,
 721                          int logicalFunc /*= wxCOPY*/, bool useMask /*= FALSE*/,
 722                          wxCoord /*xsrcMask = -1*/, wxCoord /*ysrcMask = -1*/)
 723 {
 724
 725     if (logicalFunc != wxCOPY)
 726     {
 727         wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::DoBlit Call requested nonCopy mode; this is not possible")) ;
 728         return FALSE ;
 729     }
 730     if (useMask != FALSE)
 731     {
 732         wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::DoBlit Call requested False mask ; this is not possible")) ;
 733         return FALSE ;
 734     }
 735     wxBitmap myBitmap (width, height) ;
 736     wxMemoryDC memDC;
 737     memDC.SelectObject( myBitmap );
 738     memDC.Blit(0, 0, width, height, source, xsrc, ysrc);
 739     memDC.SelectObject( wxNullBitmap );
 740     DoDrawBitmap(myBitmap, xdest, ydest);
 741     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoBlit Call executed")) ;
 742     return FALSE ;
 743 }
 744
 745
 746 void wxSVGFileDC::DoDrawIcon(const class wxIcon & myIcon, wxCoord x, wxCoord y)
 747 {
 748     wxBitmap myBitmap (myIcon.GetWidth(), myIcon.GetHeight() ) ;
 749     wxMemoryDC memDC;
 750     memDC.SelectObject( myBitmap );
 751     memDC.DrawIcon(myIcon,0,0);
 752     memDC.SelectObject( wxNullBitmap );
 753     DoDrawBitmap(myBitmap, x, y);
 754     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawIcon Call executed")) ;
 755     return ;
 756 }
 757
 758
 759
 760 void wxSVGFileDC::DoDrawBitmap(const class wxBitmap & bmp, wxCoord x, wxCoord y , bool  WXUNUSED(bTransparent) /*=0*/ )
 761 {
 762     if (m_graphics_changed) NewGraphics ();
 763
 764     wxString sTmp, s, sPNG ;
 765     wxImage::AddHandler(new wxPNGHandler);
 766
 767 // create suitable file name
 768     sTmp.Printf ( wxT("_image%d.png"), m_sub_images);
 769     sPNG = m_filename.BeforeLast(wxT('.')) + sTmp;
 770     while (wxFile::Exists(sPNG) )
 771     {
 772         m_sub_images ++ ;
 773         sTmp.Printf ( wxT("_image%d.png"), m_sub_images);
 774         sPNG = m_filename.BeforeLast(wxT('.')) + sTmp;
 775     }
 776
 777 //create copy of bitmap (wxGTK doesn't like saving a constant bitmap)
 778     wxBitmap myBitmap = bmp ;
 779 //save it
 780     bool bPNG_OK = myBitmap.SaveFile(sPNG,wxBITMAP_TYPE_PNG);
 781
 782 // refrence the bitmap from the SVG doc
 783     int w = myBitmap.GetWidth();
 784     int h = myBitmap.GetHeight();
 785     sTmp.Printf ( wxT(" <image x=\"%d\" y=\"%d\" width=\"%dpx\" height=\"%dpx\" "), x,y,w,h );
 786     s = s + sTmp ;
 787     sTmp.Printf ( wxT(" xlink:href=\"%s\"> \n"), sPNG.c_str() );
 788     s = s + sTmp + wxT("<title>Image from wxSVG</title>  </image>") + newline;
 789
 790     if (m_OK && bPNG_OK)
 791     {
 792         m_outfile->Write (s.c_str(), s.Len() ) ;
 793     }
 794     m_OK = m_outfile->Ok () && bPNG_OK;
 795     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawBitmap Call executed")) ;
 796
 797     return  ;
 798 }
 799
 800
 801 // ---------------------------------------------------------------------------
 802 // coordinates transformations
 803 // ---------------------------------------------------------------------------
 804
 805 wxCoord wxSVGFileDC::DeviceToLogicalX(wxCoord x) const
 806 {
 807     return XDEV2LOG(x);
 808 }
 809
 810
 811 wxCoord wxSVGFileDC::DeviceToLogicalY(wxCoord y) const
 812 {
 813     return YDEV2LOG(y);
 814 }
 815
 816
 817 wxCoord wxSVGFileDC::DeviceToLogicalXRel(wxCoord x) const
 818 {
 819     return XDEV2LOGREL(x);
 820 }
 821
 822
 823 wxCoord wxSVGFileDC::DeviceToLogicalYRel(wxCoord y) const
 824 {
 825     return YDEV2LOGREL(y);
 826 }
 827
 828
 829 wxCoord wxSVGFileDC::LogicalToDeviceX(wxCoord x) const
 830 {
 831     return XLOG2DEV(x);
 832 }
 833
 834
 835 wxCoord wxSVGFileDC::LogicalToDeviceY(wxCoord y) const
 836 {
 837     return YLOG2DEV(y);
 838 }
 839
 840
 841 wxCoord wxSVGFileDC::LogicalToDeviceXRel(wxCoord x) const
 842 {
 843     return XLOG2DEVREL(x);
 844 }
 845
 846
 847 wxCoord wxSVGFileDC::LogicalToDeviceYRel(wxCoord y) const
 848 {
 849     return YLOG2DEVREL(y);
 850 }
 851
 852
 853 #ifdef __BORLANDC__
 854 #pragma warn .rch
 855 #pragma warn .ccc
 856 #endif