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