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