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 #if wxUSE_SVG
  19
  20 #ifndef WX_PRECOMP
  21     #include "wx/dcmemory.h"
  22     #include "wx/dcscreen.h"
  23     #include "wx/icon.h"
  24     #include "wx/image.h"
  25 #endif
  26
  27 #include "wx/dcsvg.h"
  28 #include "wx/wfstream.h"
  29
  30 #define wxSVG_DEBUG FALSE
  31 // or TRUE to see the calls being executed
  32
  33 #define newline        wxString(wxT("\n"))
  34 #define space          wxString(wxT(" "))
  35 #define semicolon      wxString(wxT(";"))
  36 #define wx_round(a)    (int)((a)+.5)
  37
  38 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
  39
  40 wxString wxColStr ( wxColour c )
  41 {
  42     unsigned char r, g, b ;
  43     r = c.Red ();
  44     g = c.Green ();
  45     b = c. Blue ();
  46
  47     // possible Unicode bug here
  48     wxString s = wxDecToHex(r) + wxDecToHex(g) + wxDecToHex(b) ;
  49     return s ;
  50 }
  51
  52
  53 wxString wxBrushString ( wxColour c, int style )
  54 {
  55     wxString s = wxT("fill:#") + wxColStr (c)  + semicolon + space ;
  56     switch ( style )
  57     {
  58         case wxSOLID :
  59             s = s + wxT("fill-opacity:1.0; ");
  60             break ;
  61         case wxTRANSPARENT:
  62             s = s + wxT("fill-opacity:0.0; ");
  63             break ;
  64
  65         default :
  66             wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::Requested Brush Style not available")) ;
  67
  68     }
  69     s = s + newline ;
  70     return s ;
  71 }
  72
  73 // ----------------------------------------------------------
  74 //   wxSVGFileDC
  75 // ----------------------------------------------------------
  76
  77 IMPLEMENT_ABSTRACT_CLASS(wxSVGFileDC, wxDC)
  78
  79 void wxSVGFileDC::Init (wxString f, int Width, int Height, float dpi)
  80
  81 {
  82     m_width = Width ;
  83     m_height = Height ;
  84
  85     m_OK = TRUE;
  86
  87     m_mm_to_pix_x = dpi/25.4;
  88     m_mm_to_pix_y = dpi/25.4;
  89
  90     m_backgroundBrush = *wxTRANSPARENT_BRUSH;
  91     m_textForegroundColour = *wxBLACK;
  92     m_textBackgroundColour = *wxWHITE;
  93     m_colour = wxColourDisplay();
  94
  95     m_pen   = *wxBLACK_PEN;
  96     m_font  = *wxNORMAL_FONT;
  97     m_brush = *wxWHITE_BRUSH;
  98
  99     m_graphics_changed = TRUE ;
 100
 101     ////////////////////code here
 102
 103     m_outfile = new wxFileOutputStream(f) ;
 104     m_OK = m_outfile->Ok ();
 105     if (m_OK)
 106     {
 107         m_filename = f ;
 108         m_sub_images = 0 ;
 109         wxString s ;
 110         s = wxT("<?xml version=\"1.0\" standalone=\"no\"?>") ; s = s + newline ;
 111         write(s);
 112         s = wxT("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\" ") + newline ;
 113         write(s);
 114         s = wxT("\"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\"> ")+ newline ;
 115         write(s);
 116         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 );
 117         write(s);
 118         s = wxT("<title>SVG Picture created as ") + wxFileNameFromPath(f) + wxT(" </title>") + newline ;
 119         write(s);
 120         s = wxString (wxT("<desc>Picture generated by wxSVG ")) + wxSVGVersion + wxT(" </desc>")+ newline ;
 121         write(s);
 122         s =  wxT("<g style=\"fill:black; stroke:black; stroke-width:1\">") + newline ;
 123         write(s);
 124
 125     }
 126 }
 127
 128
 129 // constructors
 130 wxSVGFileDC::wxSVGFileDC (wxString f)
 131 {
 132     // quarter 640x480 screen display at 72 dpi
 133     Init (f,320,240,72.0);
 134 }
 135
 136 wxSVGFileDC::wxSVGFileDC (wxString f, int Width, int Height)
 137 {
 138     Init (f,Width,Height,72.0);
 139 }
 140
 141 wxSVGFileDC::wxSVGFileDC (wxString f, int Width, int Height, float dpi)
 142 {
 143     Init (f,Width,Height,dpi);
 144 }
 145
 146 wxSVGFileDC::~wxSVGFileDC()
 147 {
 148     wxString s = wxT("</g> \n</svg> \n") ;
 149     write(s);
 150     delete m_outfile ;
 151 }
 152
 153
 154 //////////////////////////////////////////////////////////////////////////////////////////
 155
 156 void wxSVGFileDC::DoDrawLine (wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 157 {
 158     if (m_graphics_changed) NewGraphics ();
 159     wxString s ;
 160     s.Printf ( wxT("<path d=\"M%d %d L%d %d\" /> \n"), x1,y1,x2,y2 );
 161     if (m_OK)
 162     {
 163         write(s);
 164     }
 165     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawLine Call executed")) ;
 166     CalcBoundingBox(x1, y1) ;
 167     CalcBoundingBox(x2, y2) ;
 168     return;
 169 }
 170
 171 void wxSVGFileDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset , wxCoord yoffset )
 172 {
 173     for ( int i = 1; i < n ; i++ )
 174     {
 175         DoDrawLine ( points [i-1].x + xoffset, points [i-1].y + yoffset,
 176             points [ i ].x + xoffset, points [ i ].y + yoffset ) ;
 177     }
 178 }
 179
 180
 181 void wxSVGFileDC::DoDrawPoint (wxCoord x1, wxCoord y1)
 182 {
 183     wxString s;
 184     if (m_graphics_changed) NewGraphics ();
 185     s = wxT("<g style = \"stroke-linecap:round;\" > ") + newline ;
 186     write(s);
 187     DrawLine ( x1,y1,x1,y1 );
 188     s = wxT("</g>");
 189     write(s);
 190 }
 191
 192
 193 void wxSVGFileDC::DoDrawCheckMark(wxCoord x1, wxCoord y1, wxCoord width, wxCoord height)
 194 {
 195     wxDCBase::DoDrawCheckMark (x1,y1,width,height) ;
 196 }
 197
 198
 199 void wxSVGFileDC::DoDrawText(const wxString& text, wxCoord x1, wxCoord y1)
 200 {
 201     DoDrawRotatedText(text, x1,y1,0.0);
 202     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawText Call executed")) ;
 203 }
 204
 205
 206 void wxSVGFileDC::DoDrawRotatedText(const wxString& sText, wxCoord x, wxCoord y, double angle)
 207 {
 208     //known bug; if the font is drawn in a scaled DC, it will not behave exactly as wxMSW
 209     if (m_graphics_changed) NewGraphics ();
 210     wxString s, sTmp;
 211
 212     // calculate bounding box
 213     wxCoord w, h, desc ;
 214     DoGetTextExtent(sText, &w, &h, &desc);
 215
 216     double rad = DegToRad(angle);
 217
 218     // wxT("upper left") and wxT("upper right")
 219     CalcBoundingBox(x, y);
 220     CalcBoundingBox((wxCoord)(x + w*cos(rad)), (wxCoord)(y - h*sin(rad)));
 221
 222     // wxT("bottom left") and wxT("bottom right")
 223     x += (wxCoord)(h*sin(rad));
 224     y += (wxCoord)(h*cos(rad));
 225     CalcBoundingBox(x, y);
 226     CalcBoundingBox((wxCoord)(x + h*sin(rad)), (wxCoord)(y + h*cos(rad)));
 227
 228     if (m_backgroundMode == wxSOLID)
 229     {
 230         // draw background first
 231         // just like DoDrawRectangle except we pass the text color to it and set the border to a 1 pixel wide text background
 232
 233         wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::Draw Rotated Text Call plotting text background")) ;
 234         sTmp.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\"  "), x,y+desc-h, w, h );
 235         s = sTmp + wxT("style=\"fill:#") + wxColStr (m_textBackgroundColour) + wxT("; ") ;
 236         s = s + wxT("stroke-width:1; stroke:#") + wxColStr (m_textBackgroundColour) + wxT("; ") ;
 237         sTmp.Printf ( wxT("\" transform=\"rotate( %.2g %d %d )  \">"), -angle, x,y ) ;
 238         s = s + sTmp + newline ;
 239         write(s);
 240     }
 241     //now do the text itself
 242     s.Printf (wxT(" <text x=\"%d\" y=\"%d\" "),x,y );
 243
 244     sTmp = m_font.GetFaceName () ;
 245     if (sTmp.Len () > 0)  s = s + wxT("style=\"font-family:") + sTmp + wxT("; ");
 246     else s = s + wxT("style=\" ") ;
 247
 248     wxString fontweights [3] = { wxT("normal"), wxT("lighter"), wxT("bold") };
 249     s = s + wxT("font-weight:") + fontweights[m_font.GetWeight() - wxNORMAL] + semicolon + space;
 250
 251     wxString fontstyles [5] = { wxT("normal"), wxT("style error"), wxT("style error"), wxT("italic"), wxT("oblique") };
 252     s = s + wxT("font-style:") + fontstyles[m_font.GetStyle() - wxNORMAL] + semicolon  + space;
 253
 254     sTmp.Printf (wxT("font-size:%dpt; fill:#"), m_font.GetPointSize () );
 255     s = s + sTmp ;
 256     s = s + wxColStr (m_textForegroundColour) + wxT("; stroke:#") + wxColStr (m_textForegroundColour) + wxT("; ") ;
 257     sTmp.Printf ( wxT("stroke-width:0;\"  transform=\"rotate( %.2g %d %d )  \" >"),  -angle, x,y ) ;
 258     s = s + sTmp + sText + wxT("</text> ") + newline ;
 259     if (m_OK)
 260     {
 261         write(s);
 262     }
 263     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawRotatedText Call executed")) ;
 264
 265 }
 266
 267
 268 void wxSVGFileDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 269 {
 270     DoDrawRoundedRectangle(x, y, width, height, 0)  ;
 271 }
 272
 273
 274 void wxSVGFileDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
 275
 276 {
 277     if (m_graphics_changed) NewGraphics ();
 278     wxString s ;
 279
 280     s.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" rx=\"%.2g\" "),
 281                x, y, width, height, radius );
 282
 283     s = s + wxT(" /> ") + newline ;
 284     write(s);
 285
 286     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawRoundedRectangle Call executed")) ;
 287     CalcBoundingBox(x, y) ;
 288     CalcBoundingBox(x + width, y + height) ;
 289
 290 }
 291
 292
 293 void wxSVGFileDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
 294 {
 295     if (m_graphics_changed) NewGraphics ();
 296     wxString s, sTmp ;
 297     s = wxT("<polygon style=\"") ;
 298     if ( fillStyle == wxODDEVEN_RULE )
 299         s = s + wxT("fill-rule:evenodd; ");
 300     else
 301         s = s + wxT("fill-rule:nonzero; ");
 302
 303     s = s  + wxT("\" \npoints=\"") ;
 304
 305     for (int i = 0; i < n;  i++)
 306     {
 307         sTmp.Printf ( wxT("%d,%d"), points [i].x+xoffset, points[i].y+yoffset );
 308         s = s + sTmp + newline ;
 309         CalcBoundingBox ( points [i].x+xoffset, points[i].y+yoffset);
 310     }
 311     s = s + wxT("\" /> ") ;
 312     s = s + newline ;
 313     write(s);
 314
 315     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawPolygon Call executed")) ;
 316 }
 317
 318
 319 void wxSVGFileDC::DoDrawEllipse (wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 320
 321 {
 322     if (m_graphics_changed) NewGraphics ();
 323
 324     int rh = height /2 ;
 325     int rw = width  /2 ;
 326
 327     wxString s;
 328     s.Printf ( wxT("<ellipse cx=\"%d\" cy=\"%d\" rx=\"%d\" ry=\"%d\" "), x+rw,y+rh, rw, rh );
 329     s = s + wxT(" /> ") + newline ;
 330
 331     write(s);
 332
 333     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawEllipse Call executed")) ;
 334     CalcBoundingBox(x, y) ;
 335     CalcBoundingBox(x + width, y + height) ;
 336 }
 337
 338
 339 void wxSVGFileDC::DoDrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc, wxCoord yc)
 340 {
 341     /* Draws an arc of a circle, centred on (xc, yc), with starting point
 342     (x1, y1) and ending at (x2, y2). The current pen is used for the outline
 343     and the current brush for filling the shape.
 344
 345     The arc is drawn in an anticlockwise direction from the start point to
 346     the end point.
 347
 348     Might be better described as Pie drawing */
 349
 350     if (m_graphics_changed) NewGraphics ();
 351     wxString s ;
 352
 353     // we need the radius of the circle which has two estimates
 354     double r1 = sqrt ( double( (x1-xc)*(x1-xc) ) + double( (y1-yc)*(y1-yc) ) );
 355     double r2 = sqrt ( double( (x2-xc)*(x2-xc) ) + double( (y2-yc)*(y2-yc) ) );
 356
 357     wxASSERT_MSG( (fabs ( r2-r1 ) <= 3), wxT("wxSVGFileDC::DoDrawArc Error in getting radii of circle")) ;
 358     if ( fabs ( r2-r1 ) > 3 )    //pixels
 359     {
 360         s = wxT("<!--- wxSVGFileDC::DoDrawArc Error in getting radii of circle --> \n") ;
 361         write(s);
 362     }
 363
 364     double theta1 = atan2((double)(yc-y1),(double)(x1-xc));
 365     if ( theta1 < 0 ) theta1 = theta1 + M_PI * 2;
 366     double theta2 = atan2((double)(yc-y2), (double)(x2-xc));
 367     if ( theta2 < 0 ) theta2 = theta2 + M_PI * 2;
 368     if ( theta2 < theta1 ) theta2 = theta2 + M_PI *2 ;
 369
 370     int fArc  ;                  // flag for large or small arc 0 means less than 180 degrees
 371     if ( fabs(theta2 - theta1) > M_PI ) fArc = 1; else fArc = 0 ;
 372
 373     int fSweep = 0 ;             // flag for sweep always 0
 374
 375     s.Printf ( wxT("<path d=\"M%d %d A%.2g %.2g 0.0 %d %d %d %d L%d %d z "),
 376         x1,y1, r1, r2, fArc, fSweep, x2, y2, xc, yc );
 377
 378     // the z means close the path and fill
 379     s = s + wxT(" \" /> ") + newline ;
 380
 381
 382     if (m_OK)
 383     {
 384         write(s);
 385     }
 386
 387     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawArc Call executed")) ;
 388 }
 389
 390
 391 void wxSVGFileDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
 392 {
 393     /*
 394     Draws an arc of an ellipse. The current pen is used for drawing the arc
 395     and the current brush is used for drawing the pie. This function is
 396     currently only available for X window and PostScript device contexts.
 397
 398     x and y specify the x and y coordinates of the upper-left corner of the
 399     rectangle that contains the ellipse.
 400
 401     width and height specify the width and height of the rectangle that
 402     contains the ellipse.
 403
 404     start and end specify the start and end of the arc relative to the
 405     three-o'clock position from the center of the rectangle. Angles are
 406     specified in degrees (360 is a complete circle). Positive values mean
 407     counter-clockwise motion. If start is equal to end, a complete ellipse
 408     will be drawn. */
 409
 410     //known bug: SVG draws with the current pen along the radii, but this does not happen in wxMSW
 411
 412     if (m_graphics_changed) NewGraphics ();
 413
 414     wxString s ;
 415     //radius
 416     double rx = w / 2 ;
 417     double ry = h / 2 ;
 418     // center
 419     double xc = x + rx ;
 420     double yc = y + ry ;
 421
 422     double xs, ys, xe, ye ;
 423     xs = xc + rx * cos (DegToRad(sa)) ;
 424     xe = xc + rx * cos (DegToRad(ea)) ;
 425     ys = yc - ry * sin (DegToRad(sa)) ;
 426     ye = yc - ry * sin (DegToRad(ea)) ;
 427
 428     ///now same as circle arc...
 429
 430     double theta1 = atan2(ys-yc, xs-xc);
 431     double theta2 = atan2(ye-yc, xe-xc);
 432
 433     int fArc  ;                  // flag for large or small arc 0 means less than 180 degrees
 434     if ( (theta2 - theta1) > 0 ) fArc = 1; else fArc = 0 ;
 435
 436     int fSweep ;
 437     if ( fabs(theta2 - theta1) > M_PI) fSweep = 1; else fSweep = 0 ;
 438
 439     s.Printf ( wxT("<path d=\"M%d %d A%d %d 0.0 %d %d  %d %d L %d %d z "),
 440         int(xs), int(ys), int(rx), int(ry),
 441         fArc, fSweep, int(xe), int(ye), int(xc), int(yc)  );
 442
 443
 444     s = s + wxT(" \" /> ") + newline ;
 445
 446     if (m_OK)
 447     {
 448         write(s);
 449     }
 450
 451     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawEllipticArc Call executed")) ;
 452 }
 453
 454
 455 void wxSVGFileDC::DoGetTextExtent(const wxString& string, wxCoord *w, wxCoord *h, wxCoord *descent , wxCoord *externalLeading , const wxFont *font) const
 456
 457 {
 458     wxScreenDC sDC ;
 459
 460     sDC.SetFont (m_font);
 461     if ( font != NULL ) sDC.SetFont ( *font );
 462     sDC.GetTextExtent(string, w,  h, descent, externalLeading );
 463     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetTextExtent Call executed")) ;
 464 }
 465
 466
 467 wxCoord wxSVGFileDC::GetCharHeight() const
 468
 469 {
 470     wxScreenDC sDC ;
 471     sDC.SetFont (m_font);
 472
 473     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetCharHeight Call executing")) ;
 474     return ( sDC.GetCharHeight() );
 475
 476 }
 477
 478
 479 wxCoord wxSVGFileDC::GetCharWidth() const
 480 {
 481     wxScreenDC sDC ;
 482     sDC.SetFont (m_font);
 483
 484     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetCharWidth Call executing")) ;
 485     return ( sDC.GetCharWidth() ) ;
 486
 487 }
 488
 489
 490 /// Set Functions /////////////////////////////////////////////////////////////////
 491 void wxSVGFileDC::SetBackground( const wxBrush &brush )
 492 {
 493
 494     m_backgroundBrush = brush;
 495     return;
 496 }
 497
 498
 499 void wxSVGFileDC::SetBackgroundMode( int mode )
 500 {
 501     m_backgroundMode = mode;
 502     return;
 503 }
 504
 505
 506 void wxSVGFileDC::SetBrush(const wxBrush& brush)
 507
 508 {
 509     m_brush = brush ;
 510
 511     m_graphics_changed = TRUE ;
 512     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetBrush Call executed")) ;
 513 }
 514
 515
 516 void wxSVGFileDC::SetPen(const wxPen& pen)
 517 {
 518     // width, color, ends, joins : currently implemented
 519     // dashes, stipple :  not implemented
 520     m_pen = pen ;
 521
 522     m_graphics_changed = TRUE ;
 523     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetPen Call executed")) ;
 524 }
 525
 526 void wxSVGFileDC::NewGraphics ()
 527 {
 528
 529     int w = m_pen.GetWidth ();
 530     wxColour c = m_pen.GetColour () ;
 531
 532     wxString s, sBrush, sPenCap, sPenJoin, sPenStyle, sLast, sWarn;
 533
 534     sBrush = wxT("</g>\n<g style=\"") + wxBrushString ( m_brush.GetColour (), m_brush.GetStyle () )
 535              + wxT("  stroke:#") + wxColStr (c) + wxT("; ") ;
 536
 537     switch ( m_pen.GetCap () )
 538     {
 539         case  wxCAP_PROJECTING :
 540             sPenCap = wxT("stroke-linecap:square; ") ;
 541             break ;
 542         case  wxCAP_BUTT :
 543             sPenCap = wxT("stroke-linecap:butt; ") ;
 544             break ;
 545         case    wxCAP_ROUND :
 546         default :
 547             sPenCap = wxT("stroke-linecap:round; ") ;
 548     };
 549     switch ( m_pen.GetJoin () )
 550     {
 551         case  wxJOIN_BEVEL :
 552             sPenJoin = wxT("stroke-linejoin:bevel; ") ;
 553             break ;
 554         case  wxJOIN_MITER :
 555             sPenJoin = wxT("stroke-linejoin:miter; ") ;
 556             break ;
 557         case    wxJOIN_ROUND :
 558         default :
 559             sPenJoin = wxT("stroke-linejoin:round; ") ;
 560     };
 561
 562     switch ( m_pen.GetStyle () )
 563     {
 564         case  wxSOLID :
 565             sPenStyle = wxT("stroke-opacity:1.0; stroke-opacity:1.0; ") ;
 566             break ;
 567         case  wxTRANSPARENT :
 568             sPenStyle = wxT("stroke-opacity:0.0; stroke-opacity:0.0; ") ;
 569             break ;
 570         default :
 571             wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::SetPen Call called to set a Style which is not available")) ;
 572             sWarn = sWarn + wxT("<!--- wxSVGFileDC::SetPen Call called to set a Style which is not available --> \n") ;
 573     }
 574
 575     sLast.Printf( wxT("stroke-width:%d\" \n   transform=\"translate(%.2g %.2g) scale(%.2g %.2g)\">"),
 576                   w, (double)m_logicalOriginX, m_logicalOriginY, m_scaleX, m_scaleY  );
 577
 578     s = sBrush + sPenCap + sPenJoin + sPenStyle + sLast + newline + sWarn;
 579     write(s);
 580     m_graphics_changed = FALSE ;
 581     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::NewGraphics Call executed")) ;
 582 }
 583
 584
 585 void wxSVGFileDC::SetFont(const wxFont& font)
 586
 587 {
 588     m_font = font ;
 589
 590     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetFont Call executed")) ;
 591 }
 592
 593
 594 // export a bitmap as a raster image in png
 595 bool wxSVGFileDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 596                          wxDC* source, wxCoord xsrc, wxCoord ysrc,
 597                          int logicalFunc /*= wxCOPY*/, bool useMask /*= FALSE*/,
 598                          wxCoord /*xsrcMask = -1*/, wxCoord /*ysrcMask = -1*/)
 599 {
 600     if (logicalFunc != wxCOPY)
 601     {
 602         wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::DoBlit Call requested nonCopy mode; this is not possible")) ;
 603         return FALSE ;
 604     }
 605     if (useMask != FALSE)
 606     {
 607         wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::DoBlit Call requested False mask ; this is not possible")) ;
 608         return FALSE ;
 609     }
 610     wxBitmap myBitmap (width, height) ;
 611     wxMemoryDC memDC;
 612     memDC.SelectObject( myBitmap );
 613     memDC.Blit(0, 0, width, height, source, xsrc, ysrc);
 614     memDC.SelectObject( wxNullBitmap );
 615     DoDrawBitmap(myBitmap, xdest, ydest);
 616     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoBlit Call executed")) ;
 617     return FALSE ;
 618 }
 619
 620 void wxSVGFileDC::DoDrawIcon(const class wxIcon & myIcon, wxCoord x, wxCoord y)
 621 {
 622     wxBitmap myBitmap (myIcon.GetWidth(), myIcon.GetHeight() ) ;
 623     wxMemoryDC memDC;
 624     memDC.SelectObject( myBitmap );
 625     memDC.DrawIcon(myIcon,0,0);
 626     memDC.SelectObject( wxNullBitmap );
 627     DoDrawBitmap(myBitmap, x, y);
 628     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawIcon Call executed")) ;
 629     return ;
 630 }
 631
 632 void wxSVGFileDC::DoDrawBitmap(const class wxBitmap & bmp, wxCoord x, wxCoord y , bool  WXUNUSED(bTransparent) /*=0*/ )
 633 {
 634     if (m_graphics_changed) NewGraphics ();
 635
 636     wxString sTmp, s, sPNG ;
 637     wxImage::AddHandler(new wxPNGHandler);
 638
 639 // create suitable file name
 640     sTmp.Printf ( wxT("_image%d.png"), m_sub_images);
 641     sPNG = m_filename.BeforeLast(wxT('.')) + sTmp;
 642     while (wxFile::Exists(sPNG) )
 643     {
 644         m_sub_images ++ ;
 645         sTmp.Printf ( wxT("_image%d.png"), m_sub_images);
 646         sPNG = m_filename.BeforeLast(wxT('.')) + sTmp;
 647     }
 648
 649 //create copy of bitmap (wxGTK doesn't like saving a constant bitmap)
 650     wxBitmap myBitmap = bmp ;
 651 //save it
 652     bool bPNG_OK = myBitmap.SaveFile(sPNG,wxBITMAP_TYPE_PNG);
 653
 654 // refrence the bitmap from the SVG doc
 655     int w = myBitmap.GetWidth();
 656     int h = myBitmap.GetHeight();
 657     sTmp.Printf ( wxT(" <image x=\"%d\" y=\"%d\" width=\"%dpx\" height=\"%dpx\" "), x,y,w,h );
 658     s = s + sTmp ;
 659     sTmp.Printf ( wxT(" xlink:href=\"%s\"> \n"), sPNG.c_str() );
 660     s = s + sTmp + wxT("<title>Image from wxSVG</title>  </image>") + newline;
 661
 662     if (m_OK && bPNG_OK)
 663     {
 664         write(s);
 665     }
 666     m_OK = m_outfile->Ok () && bPNG_OK;
 667     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawBitmap Call executed")) ;
 668
 669     return  ;
 670 }
 671
 672 void wxSVGFileDC::write(const wxString &s)
 673 {
 674     const wxCharBuffer buf = s.utf8_str();
 675     m_outfile->Write(buf, strlen((const char *)buf));
 676     m_OK = m_outfile->Ok();
 677 }
 678
 679 // ---------------------------------------------------------------------------
 680 // coordinates transformations
 681 // ---------------------------------------------------------------------------
 682
 683 void wxSVGFileDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 684 {
 685     wxDCBase::SetAxisOrientation( xLeftRight, yBottomUp );
 686 }
 687
 688 void wxSVGFileDC::SetMapMode(int mode)
 689 {
 690     wxDCBase::SetMapMode(mode);
 691 }
 692
 693 void wxSVGFileDC::SetUserScale(double x, double y)
 694 {
 695     wxDCBase::SetUserScale(x,y);
 696 }
 697
 698 void wxSVGFileDC::SetLogicalScale(double x, double y)
 699 {
 700     wxDCBase::SetLogicalScale(x,y);
 701 }
 702
 703 void wxSVGFileDC::SetLogicalOrigin(wxCoord x, wxCoord y)
 704 {
 705     wxDCBase::SetLogicalOrigin(x,y);
 706 }
 707
 708 void wxSVGFileDC::SetDeviceOrigin(wxCoord x, wxCoord y)
 709 {
 710     wxDCBase::SetDeviceOrigin(x,y);
 711 }
 712
 713
 714
 715 #ifdef __BORLANDC__
 716 #pragma warn .rch
 717 #pragma warn .ccc
 718 #endif
 719
 720 #endif // wxUSE_SVG
 721