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/dcsvg.h"
  23 #include "wx/image.h"
  24
  25 #define wxSVG_DEBUG FALSE
  26 // or TRUE to see the calls being executed
  27
  28 #define newline        wxString(wxT("\n"))
  29 #define space          wxString(wxT(" "))
  30 #define semicolon      wxString(wxT(";"))
  31 #define wx_round(a)    (int)((a)+.5)
  32
  33 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
  34
  35 wxString wxColStr ( wxColour c )
  36 {
  37     unsigned char r, g, b ;
  38     r = c.Red ();
  39     g = c.Green ();
  40     b = c. Blue ();
  41
  42     // possible Unicode bug here
  43     wxString s = wxDecToHex(r) + wxDecToHex(g) + wxDecToHex(b) ;
  44     return s ;
  45 }
  46
  47
  48 wxString wxBrushString ( wxColour c, int style )
  49 {
  50     wxString s = wxT("fill:#") + wxColStr (c)  + semicolon + space ;
  51     switch ( style )
  52     {
  53         case wxSOLID :
  54             s = s + wxT("fill-opacity:1.0; ");
  55             break ;
  56         case wxTRANSPARENT:
  57             s = s + wxT("fill-opacity:0.0; ");
  58             break ;
  59
  60         default :
  61             wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::Requested Brush Style not available")) ;
  62
  63     }
  64     s = s + newline ;
  65     return s ;
  66 }
  67
  68 // ----------------------------------------------------------
  69 //   wxSVGFileDC
  70 // ----------------------------------------------------------
  71
  72 IMPLEMENT_ABSTRACT_CLASS(wxSVGFileDC, wxDC)
  73
  74 void wxSVGFileDC::Init (wxString f, int Width, int Height, float dpi)
  75
  76 {
  77     m_width = Width ;
  78     m_height = Height ;
  79
  80     m_OK = TRUE;
  81
  82     m_mm_to_pix_x = dpi/25.4;
  83     m_mm_to_pix_y = dpi/25.4;
  84
  85     m_backgroundBrush = *wxTRANSPARENT_BRUSH;
  86     m_textForegroundColour = *wxBLACK;
  87     m_textBackgroundColour = *wxWHITE;
  88     m_colour = wxColourDisplay();
  89
  90     m_pen   = *wxBLACK_PEN;
  91     m_font  = *wxNORMAL_FONT;
  92     m_brush = *wxWHITE_BRUSH;
  93
  94     m_graphics_changed = TRUE ;
  95
  96     ////////////////////code here
  97
  98     m_outfile = new wxFileOutputStream(f) ;
  99     m_OK = m_outfile->Ok ();
 100     if (m_OK)
 101     {
 102         m_filename = f ;
 103         m_sub_images = 0 ;
 104         wxString s ;
 105         s = wxT("<?xml version=\"1.0\" standalone=\"no\"?>") ; s = s + newline ;
 106         write(s);
 107         s = wxT("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\" ") + newline ;
 108         write(s);
 109         s = wxT("\"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\"> ")+ newline ;
 110         write(s);
 111         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 );
 112         write(s);
 113         s = wxT("<title>SVG Picture created as ") + wxFileNameFromPath(f) + wxT(" </title>") + newline ;
 114         write(s);
 115         s = wxString (wxT("<desc>Picture generated by wxSVG ")) + wxSVGVersion + wxT(" </desc>")+ newline ;
 116         write(s);
 117         s =  wxT("<g style=\"fill:black; stroke:black; stroke-width:1\">") + newline ;
 118         write(s);
 119
 120     }
 121 }
 122
 123
 124 // constructors
 125 wxSVGFileDC::wxSVGFileDC (wxString f)
 126 {
 127     // quarter 640x480 screen display at 72 dpi
 128     Init (f,320,240,72.0);
 129 }
 130
 131 wxSVGFileDC::wxSVGFileDC (wxString f, int Width, int Height)
 132 {
 133     Init (f,Width,Height,72.0);
 134 }
 135
 136 wxSVGFileDC::wxSVGFileDC (wxString f, int Width, int Height, float dpi)
 137 {
 138     Init (f,Width,Height,dpi);
 139 }
 140
 141 wxSVGFileDC::~wxSVGFileDC()
 142 {
 143     wxString s = wxT("</g> \n</svg> \n") ;
 144     write(s);
 145     delete m_outfile ;
 146 }
 147
 148
 149 //////////////////////////////////////////////////////////////////////////////////////////
 150
 151 void wxSVGFileDC::DoDrawLine (wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 152 {
 153     if (m_graphics_changed) NewGraphics ();
 154     wxString s ;
 155     s.Printf ( wxT("<path d=\"M%d %d L%d %d\" /> \n"), x1,y1,x2,y2 );
 156     if (m_OK)
 157     {
 158         write(s);
 159     }
 160     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawLine Call executed")) ;
 161     CalcBoundingBox(x1, y1) ;
 162     CalcBoundingBox(x2, y2) ;
 163     return;
 164 }
 165
 166 void wxSVGFileDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset , wxCoord yoffset )
 167 {
 168     for ( int i = 1; i < n ; i++ )
 169     {
 170         DoDrawLine ( points [i-1].x + xoffset, points [i-1].y + yoffset,
 171             points [ i ].x + xoffset, points [ i ].y + yoffset ) ;
 172     }
 173 }
 174
 175
 176 void wxSVGFileDC::DoDrawPoint (wxCoord x1, wxCoord y1)
 177 {
 178     wxString s;
 179     if (m_graphics_changed) NewGraphics ();
 180     s = wxT("<g style = \"stroke-linecap:round;\" > ") + newline ;
 181     write(s);
 182     DrawLine ( x1,y1,x1,y1 );
 183     s = wxT("</g>");
 184     write(s);
 185 }
 186
 187
 188 void wxSVGFileDC::DoDrawCheckMark(wxCoord x1, wxCoord y1, wxCoord width, wxCoord height)
 189 {
 190     wxDCBase::DoDrawCheckMark (x1,y1,width,height) ;
 191 }
 192
 193
 194 void wxSVGFileDC::DoDrawText(const wxString& text, wxCoord x1, wxCoord y1)
 195 {
 196     DoDrawRotatedText(text, x1,y1,0.0);
 197     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawText Call executed")) ;
 198 }
 199
 200
 201 void wxSVGFileDC::DoDrawRotatedText(const wxString& sText, wxCoord x, wxCoord y, double angle)
 202 {
 203     //known bug; if the font is drawn in a scaled DC, it will not behave exactly as wxMSW
 204     if (m_graphics_changed) NewGraphics ();
 205     wxString s, sTmp;
 206
 207     // calculate bounding box
 208     wxCoord w, h, desc ;
 209     DoGetTextExtent(sText, &w, &h, &desc);
 210
 211     double rad = DegToRad(angle);
 212
 213     // wxT("upper left") and wxT("upper right")
 214     CalcBoundingBox(x, y);
 215     CalcBoundingBox((wxCoord)(x + w*cos(rad)), (wxCoord)(y - h*sin(rad)));
 216
 217     // wxT("bottom left") and wxT("bottom right")
 218     x += (wxCoord)(h*sin(rad));
 219     y += (wxCoord)(h*cos(rad));
 220     CalcBoundingBox(x, y);
 221     CalcBoundingBox((wxCoord)(x + h*sin(rad)), (wxCoord)(y + h*cos(rad)));
 222
 223     if (m_backgroundMode == wxSOLID)
 224     {
 225         // draw background first
 226         // just like DoDrawRectangle except we pass the text color to it and set the border to a 1 pixel wide text background
 227
 228         wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::Draw Rotated Text Call plotting text background")) ;
 229         sTmp.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\"  "), x,y+desc-h, w, h );
 230         s = sTmp + wxT("style=\"fill:#") + wxColStr (m_textBackgroundColour) + wxT("; ") ;
 231         s = s + wxT("stroke-width:1; stroke:#") + wxColStr (m_textBackgroundColour) + wxT("; ") ;
 232         sTmp.Printf ( wxT("\" transform=\"rotate( %.2g %d %d )  \">"), -angle, x,y ) ;
 233         s = s + sTmp + newline ;
 234         write(s);
 235     }
 236     //now do the text itself
 237     s.Printf (wxT(" <text x=\"%d\" y=\"%d\" "),x,y );
 238
 239     sTmp = m_font.GetFaceName () ;
 240     if (sTmp.Len () > 0)  s = s + wxT("style=\"font-family:") + sTmp + wxT("; ");
 241     else s = s + wxT("style=\" ") ;
 242
 243     wxString fontweights [3] = { wxT("normal"), wxT("lighter"), wxT("bold") };
 244     s = s + wxT("font-weight:") + fontweights[m_font.GetWeight() - wxNORMAL] + semicolon + space;
 245
 246     wxString fontstyles [5] = { wxT("normal"), wxT("style error"), wxT("style error"), wxT("italic"), wxT("oblique") };
 247     s = s + wxT("font-style:") + fontstyles[m_font.GetStyle() - wxNORMAL] + semicolon  + space;
 248
 249     sTmp.Printf (wxT("font-size:%dpt; fill:#"), m_font.GetPointSize () );
 250     s = s + sTmp ;
 251     s = s + wxColStr (m_textForegroundColour) + wxT("; stroke:#") + wxColStr (m_textForegroundColour) + wxT("; ") ;
 252     sTmp.Printf ( wxT("stroke-width:0;\"  transform=\"rotate( %.2g %d %d )  \" >"),  -angle, x,y ) ;
 253     s = s + sTmp + sText + wxT("</text> ") + newline ;
 254     if (m_OK)
 255     {
 256         write(s);
 257     }
 258     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawRotatedText Call executed")) ;
 259
 260 }
 261
 262
 263 void wxSVGFileDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 264 {
 265     DoDrawRoundedRectangle(x, y, width, height, 0)  ;
 266 }
 267
 268
 269 void wxSVGFileDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
 270
 271 {
 272     if (m_graphics_changed) NewGraphics ();
 273     wxString s ;
 274
 275     s.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" rx=\"%.2g\" "),
 276                x, y, width, height, radius );
 277
 278     s = s + wxT(" /> ") + newline ;
 279     write(s);
 280
 281     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawRoundedRectangle Call executed")) ;
 282     CalcBoundingBox(x, y) ;
 283     CalcBoundingBox(x + width, y + height) ;
 284
 285 }
 286
 287
 288 void wxSVGFileDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
 289 {
 290     if (m_graphics_changed) NewGraphics ();
 291     wxString s, sTmp ;
 292     s = wxT("<polygon style=\"") ;
 293     if ( fillStyle == wxODDEVEN_RULE )
 294         s = s + wxT("fill-rule:evenodd; ");
 295     else
 296         s = s + wxT("fill-rule:nonzero; ");
 297
 298     s = s  + wxT("\" \npoints=\"") ;
 299
 300     for (int i = 0; i < n;  i++)
 301     {
 302         sTmp.Printf ( wxT("%d,%d"), points [i].x+xoffset, points[i].y+yoffset );
 303         s = s + sTmp + newline ;
 304         CalcBoundingBox ( points [i].x+xoffset, points[i].y+yoffset);
 305     }
 306     s = s + wxT("\" /> ") ;
 307     s = s + newline ;
 308     write(s);
 309
 310     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawPolygon Call executed")) ;
 311 }
 312
 313
 314 void wxSVGFileDC::DoDrawEllipse (wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 315
 316 {
 317     if (m_graphics_changed) NewGraphics ();
 318
 319     int rh = height /2 ;
 320     int rw = width  /2 ;
 321
 322     wxString s;
 323     s.Printf ( wxT("<ellipse cx=\"%d\" cy=\"%d\" rx=\"%d\" ry=\"%d\" "), x+rw,y+rh, rw, rh );
 324     s = s + wxT(" /> ") + newline ;
 325
 326     write(s);
 327
 328     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawEllipse Call executed")) ;
 329     CalcBoundingBox(x, y) ;
 330     CalcBoundingBox(x + width, y + height) ;
 331 }
 332
 333
 334 void wxSVGFileDC::DoDrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc, wxCoord yc)
 335 {
 336     /* Draws an arc of a circle, centred on (xc, yc), with starting point
 337     (x1, y1) and ending at (x2, y2). The current pen is used for the outline
 338     and the current brush for filling the shape.
 339
 340     The arc is drawn in an anticlockwise direction from the start point to
 341     the end point.
 342
 343     Might be better described as Pie drawing */
 344
 345     if (m_graphics_changed) NewGraphics ();
 346     wxString s ;
 347
 348     // we need the radius of the circle which has two estimates
 349     double r1 = sqrt ( double( (x1-xc)*(x1-xc) ) + double( (y1-yc)*(y1-yc) ) );
 350     double r2 = sqrt ( double( (x2-xc)*(x2-xc) ) + double( (y2-yc)*(y2-yc) ) );
 351
 352     wxASSERT_MSG( (fabs ( r2-r1 ) <= 3), wxT("wxSVGFileDC::DoDrawArc Error in getting radii of circle")) ;
 353     if ( fabs ( r2-r1 ) > 3 )    //pixels
 354     {
 355         s = wxT("<!--- wxSVGFileDC::DoDrawArc Error in getting radii of circle --> \n") ;
 356         write(s);
 357     }
 358
 359     double theta1 = atan2((double)(yc-y1),(double)(x1-xc));
 360     if ( theta1 < 0 ) theta1 = theta1 + M_PI * 2;
 361     double theta2 = atan2((double)(yc-y2), (double)(x2-xc));
 362     if ( theta2 < 0 ) theta2 = theta2 + M_PI * 2;
 363     if ( theta2 < theta1 ) theta2 = theta2 + M_PI *2 ;
 364
 365     int fArc  ;                  // flag for large or small arc 0 means less than 180 degrees
 366     if ( fabs(theta2 - theta1) > M_PI ) fArc = 1; else fArc = 0 ;
 367
 368     int fSweep = 0 ;             // flag for sweep always 0
 369
 370     s.Printf ( wxT("<path d=\"M%d %d A%.2g %.2g 0.0 %d %d %d %d L%d %d z "),
 371         x1,y1, r1, r2, fArc, fSweep, x2, y2, xc, yc );
 372
 373     // the z means close the path and fill
 374     s = s + wxT(" \" /> ") + newline ;
 375
 376
 377     if (m_OK)
 378     {
 379         write(s);
 380     }
 381
 382     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawArc Call executed")) ;
 383 }
 384
 385
 386 void wxSVGFileDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
 387 {
 388     /*
 389     Draws an arc of an ellipse. The current pen is used for drawing the arc
 390     and the current brush is used for drawing the pie. This function is
 391     currently only available for X window and PostScript device contexts.
 392
 393     x and y specify the x and y coordinates of the upper-left corner of the
 394     rectangle that contains the ellipse.
 395
 396     width and height specify the width and height of the rectangle that
 397     contains the ellipse.
 398
 399     start and end specify the start and end of the arc relative to the
 400     three-o'clock position from the center of the rectangle. Angles are
 401     specified in degrees (360 is a complete circle). Positive values mean
 402     counter-clockwise motion. If start is equal to end, a complete ellipse
 403     will be drawn. */
 404
 405     //known bug: SVG draws with the current pen along the radii, but this does not happen in wxMSW
 406
 407     if (m_graphics_changed) NewGraphics ();
 408
 409     wxString s ;
 410     //radius
 411     double rx = w / 2 ;
 412     double ry = h / 2 ;
 413     // center
 414     double xc = x + rx ;
 415     double yc = y + ry ;
 416
 417     double xs, ys, xe, ye ;
 418     xs = xc + rx * cos (DegToRad(sa)) ;
 419     xe = xc + rx * cos (DegToRad(ea)) ;
 420     ys = yc - ry * sin (DegToRad(sa)) ;
 421     ye = yc - ry * sin (DegToRad(ea)) ;
 422
 423     ///now same as circle arc...
 424
 425     double theta1 = atan2(ys-yc, xs-xc);
 426     double theta2 = atan2(ye-yc, xe-xc);
 427
 428     int fArc  ;                  // flag for large or small arc 0 means less than 180 degrees
 429     if ( (theta2 - theta1) > 0 ) fArc = 1; else fArc = 0 ;
 430
 431     int fSweep ;
 432     if ( fabs(theta2 - theta1) > M_PI) fSweep = 1; else fSweep = 0 ;
 433
 434     s.Printf ( wxT("<path d=\"M%d %d A%d %d 0.0 %d %d  %d %d L %d %d z "),
 435         int(xs), int(ys), int(rx), int(ry),
 436         fArc, fSweep, int(xe), int(ye), int(xc), int(yc)  );
 437
 438
 439     s = s + wxT(" \" /> ") + newline ;
 440
 441     if (m_OK)
 442     {
 443         write(s);
 444     }
 445
 446     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawEllipticArc Call executed")) ;
 447 }
 448
 449
 450 void wxSVGFileDC::DoGetTextExtent(const wxString& string, wxCoord *w, wxCoord *h, wxCoord *descent , wxCoord *externalLeading , const wxFont *font) const
 451
 452 {
 453     wxScreenDC sDC ;
 454
 455     sDC.SetFont (m_font);
 456     if ( font != NULL ) sDC.SetFont ( *font );
 457     sDC.GetTextExtent(string, w,  h, descent, externalLeading );
 458     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetTextExtent Call executed")) ;
 459 }
 460
 461
 462 wxCoord wxSVGFileDC::GetCharHeight() const
 463
 464 {
 465     wxScreenDC sDC ;
 466     sDC.SetFont (m_font);
 467
 468     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetCharHeight Call executing")) ;
 469     return ( sDC.GetCharHeight() );
 470
 471 }
 472
 473
 474 wxCoord wxSVGFileDC::GetCharWidth() const
 475 {
 476     wxScreenDC sDC ;
 477     sDC.SetFont (m_font);
 478
 479     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetCharWidth Call executing")) ;
 480     return ( sDC.GetCharWidth() ) ;
 481
 482 }
 483
 484
 485 /// Set Functions /////////////////////////////////////////////////////////////////
 486 void wxSVGFileDC::SetBackground( const wxBrush &brush )
 487 {
 488
 489     m_backgroundBrush = brush;
 490     return;
 491 }
 492
 493
 494 void wxSVGFileDC::SetBackgroundMode( int mode )
 495 {
 496     m_backgroundMode = mode;
 497     return;
 498 }
 499
 500
 501 void wxSVGFileDC::SetBrush(const wxBrush& brush)
 502
 503 {
 504     m_brush = brush ;
 505
 506     m_graphics_changed = TRUE ;
 507     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetBrush Call executed")) ;
 508 }
 509
 510
 511 void wxSVGFileDC::SetPen(const wxPen& pen)
 512 {
 513     // width, color, ends, joins : currently implemented
 514     // dashes, stipple :  not implemented
 515     m_pen = pen ;
 516
 517     m_graphics_changed = TRUE ;
 518     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetPen Call executed")) ;
 519 }
 520
 521 void wxSVGFileDC::NewGraphics ()
 522 {
 523
 524     int w = m_pen.GetWidth ();
 525     wxColour c = m_pen.GetColour () ;
 526
 527     wxString s, sBrush, sPenCap, sPenJoin, sPenStyle, sLast, sWarn;
 528
 529     sBrush = wxT("</g>\n<g style=\"") + wxBrushString ( m_brush.GetColour (), m_brush.GetStyle () )
 530              + wxT("  stroke:#") + wxColStr (c) + wxT("; ") ;
 531
 532     switch ( m_pen.GetCap () )
 533     {
 534         case  wxCAP_PROJECTING :
 535             sPenCap = wxT("stroke-linecap:square; ") ;
 536             break ;
 537         case  wxCAP_BUTT :
 538             sPenCap = wxT("stroke-linecap:butt; ") ;
 539             break ;
 540         case    wxCAP_ROUND :
 541         default :
 542             sPenCap = wxT("stroke-linecap:round; ") ;
 543     };
 544     switch ( m_pen.GetJoin () )
 545     {
 546         case  wxJOIN_BEVEL :
 547             sPenJoin = wxT("stroke-linejoin:bevel; ") ;
 548             break ;
 549         case  wxJOIN_MITER :
 550             sPenJoin = wxT("stroke-linejoin:miter; ") ;
 551             break ;
 552         case    wxJOIN_ROUND :
 553         default :
 554             sPenJoin = wxT("stroke-linejoin:round; ") ;
 555     };
 556
 557     switch ( m_pen.GetStyle () )
 558     {
 559         case  wxSOLID :
 560             sPenStyle = wxT("stroke-opacity:1.0; stroke-opacity:1.0; ") ;
 561             break ;
 562         case  wxTRANSPARENT :
 563             sPenStyle = wxT("stroke-opacity:0.0; stroke-opacity:0.0; ") ;
 564             break ;
 565         default :
 566             wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::SetPen Call called to set a Style which is not available")) ;
 567             sWarn = sWarn + wxT("<!--- wxSVGFileDC::SetPen Call called to set a Style which is not available --> \n") ;
 568     }
 569
 570     sLast.Printf( wxT("stroke-width:%d\" \n   transform=\"translate(%.2g %.2g) scale(%.2g %.2g)\">"),
 571                   w, (double)m_logicalOriginX, m_logicalOriginY, m_scaleX, m_scaleY  );
 572
 573     s = sBrush + sPenCap + sPenJoin + sPenStyle + sLast + newline + sWarn;
 574     write(s);
 575     m_graphics_changed = FALSE ;
 576     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::NewGraphics Call executed")) ;
 577 }
 578
 579
 580 void wxSVGFileDC::SetFont(const wxFont& font)
 581
 582 {
 583     m_font = font ;
 584
 585     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetFont Call executed")) ;
 586 }
 587
 588
 589 // export a bitmap as a raster image in png
 590 bool wxSVGFileDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 591                          wxDC* source, wxCoord xsrc, wxCoord ysrc,
 592                          int logicalFunc /*= wxCOPY*/, bool useMask /*= FALSE*/,
 593                          wxCoord /*xsrcMask = -1*/, wxCoord /*ysrcMask = -1*/)
 594 {
 595     if (logicalFunc != wxCOPY)
 596     {
 597         wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::DoBlit Call requested nonCopy mode; this is not possible")) ;
 598         return FALSE ;
 599     }
 600     if (useMask != FALSE)
 601     {
 602         wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::DoBlit Call requested False mask ; this is not possible")) ;
 603         return FALSE ;
 604     }
 605     wxBitmap myBitmap (width, height) ;
 606     wxMemoryDC memDC;
 607     memDC.SelectObject( myBitmap );
 608     memDC.Blit(0, 0, width, height, source, xsrc, ysrc);
 609     memDC.SelectObject( wxNullBitmap );
 610     DoDrawBitmap(myBitmap, xdest, ydest);
 611     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoBlit Call executed")) ;
 612     return FALSE ;
 613 }
 614
 615 void wxSVGFileDC::DoDrawIcon(const class wxIcon & myIcon, wxCoord x, wxCoord y)
 616 {
 617     wxBitmap myBitmap (myIcon.GetWidth(), myIcon.GetHeight() ) ;
 618     wxMemoryDC memDC;
 619     memDC.SelectObject( myBitmap );
 620     memDC.DrawIcon(myIcon,0,0);
 621     memDC.SelectObject( wxNullBitmap );
 622     DoDrawBitmap(myBitmap, x, y);
 623     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawIcon Call executed")) ;
 624     return ;
 625 }
 626
 627 void wxSVGFileDC::DoDrawBitmap(const class wxBitmap & bmp, wxCoord x, wxCoord y , bool  WXUNUSED(bTransparent) /*=0*/ )
 628 {
 629     if (m_graphics_changed) NewGraphics ();
 630
 631     wxString sTmp, s, sPNG ;
 632     wxImage::AddHandler(new wxPNGHandler);
 633
 634 // create suitable file name
 635     sTmp.Printf ( wxT("_image%d.png"), m_sub_images);
 636     sPNG = m_filename.BeforeLast(wxT('.')) + sTmp;
 637     while (wxFile::Exists(sPNG) )
 638     {
 639         m_sub_images ++ ;
 640         sTmp.Printf ( wxT("_image%d.png"), m_sub_images);
 641         sPNG = m_filename.BeforeLast(wxT('.')) + sTmp;
 642     }
 643
 644 //create copy of bitmap (wxGTK doesn't like saving a constant bitmap)
 645     wxBitmap myBitmap = bmp ;
 646 //save it
 647     bool bPNG_OK = myBitmap.SaveFile(sPNG,wxBITMAP_TYPE_PNG);
 648
 649 // refrence the bitmap from the SVG doc
 650     int w = myBitmap.GetWidth();
 651     int h = myBitmap.GetHeight();
 652     sTmp.Printf ( wxT(" <image x=\"%d\" y=\"%d\" width=\"%dpx\" height=\"%dpx\" "), x,y,w,h );
 653     s = s + sTmp ;
 654     sTmp.Printf ( wxT(" xlink:href=\"%s\"> \n"), sPNG.c_str() );
 655     s = s + sTmp + wxT("<title>Image from wxSVG</title>  </image>") + newline;
 656
 657     if (m_OK && bPNG_OK)
 658     {
 659         write(s);
 660     }
 661     m_OK = m_outfile->Ok () && bPNG_OK;
 662     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawBitmap Call executed")) ;
 663
 664     return  ;
 665 }
 666
 667 void wxSVGFileDC::write(const wxString &s)
 668 {
 669     const wxCharBuffer buf = s.utf8_str();
 670     m_outfile->Write(buf, strlen((const char *)buf));
 671     m_OK = m_outfile->Ok();
 672 }
 673
 674 // ---------------------------------------------------------------------------
 675 // coordinates transformations
 676 // ---------------------------------------------------------------------------
 677
 678 void wxSVGFileDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 679 {
 680     wxDCBase::SetAxisOrientation( xLeftRight, yBottomUp );
 681 }
 682
 683 void wxSVGFileDC::SetMapMode(int mode)
 684 {
 685     wxDCBase::SetMapMode(mode);
 686 }
 687
 688 void wxSVGFileDC::SetUserScale(double x, double y)
 689 {
 690     wxDCBase::SetUserScale(x,y);
 691 }
 692
 693 void wxSVGFileDC::SetLogicalScale(double x, double y)
 694 {
 695     wxDCBase::SetLogicalScale(x,y);
 696 }
 697
 698 void wxSVGFileDC::SetLogicalOrigin(wxCoord x, wxCoord y)
 699 {
 700     wxDCBase::SetLogicalOrigin(x,y);
 701 }
 702
 703 void wxSVGFileDC::SetDeviceOrigin(wxCoord x, wxCoord y)
 704 {
 705     wxDCBase::SetDeviceOrigin(x,y);
 706 }
 707
 708
 709
 710 #ifdef __BORLANDC__
 711 #pragma warn .rch
 712 #pragma warn .ccc
 713 #endif