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 #include "wx/filename.h"
  30
  31 #define wxSVG_DEBUG FALSE
  32 // or TRUE to see the calls being executed
  33
  34 #define newline        wxString(wxT("\n"))
  35 #define space          wxString(wxT(" "))
  36 #define semicolon      wxString(wxT(";"))
  37 #define wx_round(a)    (int)((a)+.5)
  38
  39 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
  40
  41 wxString wxColStr ( wxColour c )
  42 {
  43     unsigned char r, g, b ;
  44     r = c.Red ();
  45     g = c.Green ();
  46     b = c. Blue ();
  47
  48     // possible Unicode bug here
  49     wxString s = wxDecToHex(r) + wxDecToHex(g) + wxDecToHex(b) ;
  50     return s ;
  51 }
  52
  53
  54 wxString wxBrushString ( wxColour c, int style )
  55 {
  56     wxString s = wxT("fill:#") + wxColStr (c)  + semicolon + space ;
  57     switch ( style )
  58     {
  59         case wxBRUSHSTYLE_SOLID :
  60             s = s + wxT("fill-opacity:1.0; ");
  61             break ;
  62         case wxBRUSHSTYLE_TRANSPARENT:
  63             s = s + wxT("fill-opacity:0.0; ");
  64             break ;
  65
  66         default :
  67             wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::Requested Brush Style not available")) ;
  68
  69     }
  70     s = s + newline ;
  71     return s ;
  72 }
  73
  74 // ----------------------------------------------------------
  75 //   wxSVGFileDC
  76 // ----------------------------------------------------------
  77
  78 IMPLEMENT_ABSTRACT_CLASS(wxSVGFileDCImpl, wxDC)
  79
  80 wxSVGFileDCImpl::wxSVGFileDCImpl( wxSVGFileDC *owner, const wxString &filename,
  81                      int width, int height, double dpi ) :
  82         wxDCImpl( owner )
  83     {
  84         Init( filename, width, height, dpi );
  85     }
  86
  87 void wxSVGFileDCImpl::Init (const wxString &filename, int Width, int Height, double dpi)
  88 {
  89     m_width = Width ;
  90     m_height = Height ;
  91
  92     m_dpi = dpi;
  93
  94     m_OK = TRUE;
  95
  96     m_mm_to_pix_x = dpi/25.4;
  97     m_mm_to_pix_y = dpi/25.4;
  98
  99     m_backgroundBrush = *wxTRANSPARENT_BRUSH;
 100     m_textForegroundColour = *wxBLACK;
 101     m_textBackgroundColour = *wxWHITE;
 102     m_colour = wxColourDisplay();
 103
 104     m_pen   = *wxBLACK_PEN;
 105     m_font  = *wxNORMAL_FONT;
 106     m_brush = *wxWHITE_BRUSH;
 107
 108     m_graphics_changed = TRUE ;
 109
 110     ////////////////////code here
 111
 112     m_outfile = new wxFileOutputStream(filename) ;
 113     m_OK = m_outfile->Ok ();
 114     if (m_OK)
 115     {
 116         m_filename = filename ;
 117         m_sub_images = 0 ;
 118         wxString s ;
 119         s = wxT("<?xml version=\"1.0\" standalone=\"no\"?>") ; s = s + newline ;
 120         write(s);
 121         s = wxT("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\" ") + newline ;
 122         write(s);
 123         s = wxT("\"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\"> ") + newline ;
 124         write(s);
 125         s =  wxT("<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" ") + newline;
 126         write(s);
 127         s.Printf( wxT("    width=\"%.2gcm\" height=\"%.2gcm\" viewBox=\"0 0 %d %d \"> \n"), float(Width)/dpi*2.54, float(Height)/dpi*2.54, Width, Height );
 128         write(s);
 129         s = wxT("<title>SVG Picture created as ") + wxFileNameFromPath(filename) + wxT(" </title>") + newline ;
 130         write(s);
 131         s = wxString (wxT("<desc>Picture generated by wxSVG ")) + wxSVGVersion + wxT(" </desc>")+ newline ;
 132         write(s);
 133         s =  wxT("<g style=\"fill:black; stroke:black; stroke-width:1\">") + newline ;
 134         write(s);
 135
 136     }
 137 }
 138
 139
 140
 141 wxSVGFileDCImpl::~wxSVGFileDCImpl()
 142 {
 143     wxString s = wxT("</g> \n</svg> \n") ;
 144     write(s);
 145     delete m_outfile ;
 146 }
 147
 148 void wxSVGFileDCImpl::DoGetSizeMM( int *width, int *height ) const
 149 {
 150     if (width)
 151         *width = wxRound( (double)m_width / m_mm_to_pix_x );
 152
 153     if (height)
 154         *height = wxRound( (double)m_height / m_mm_to_pix_y );
 155 }
 156
 157 wxSize wxSVGFileDCImpl::GetPPI() const
 158 {
 159     return wxSize( wxRound(m_dpi), wxRound(m_dpi) );
 160 }
 161
 162 void wxSVGFileDCImpl::DoDrawLine (wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 163 {
 164     if (m_graphics_changed) NewGraphics ();
 165     wxString s ;
 166     s.Printf ( wxT("<path d=\"M%d %d L%d %d\" /> \n"), x1,y1,x2,y2 );
 167     if (m_OK)
 168     {
 169         write(s);
 170     }
 171     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawLine Call executed")) ;
 172     CalcBoundingBox(x1, y1) ;
 173     CalcBoundingBox(x2, y2) ;
 174     return;
 175 }
 176
 177 void wxSVGFileDCImpl::DoDrawLines(int n, wxPoint points[], wxCoord xoffset , wxCoord yoffset )
 178 {
 179     for ( int i = 1; i < n ; i++ )
 180     {
 181         DoDrawLine ( points [i-1].x + xoffset, points [i-1].y + yoffset,
 182             points [ i ].x + xoffset, points [ i ].y + yoffset ) ;
 183     }
 184 }
 185
 186
 187 void wxSVGFileDCImpl::DoDrawPoint (wxCoord x1, wxCoord y1)
 188 {
 189     wxString s;
 190     if (m_graphics_changed) NewGraphics ();
 191     s = wxT("<g style = \"stroke-linecap:round;\" > ") + newline ;
 192     write(s);
 193     DoDrawLine ( x1,y1,x1,y1 );
 194     s = wxT("</g>");
 195     write(s);
 196 }
 197
 198
 199 void wxSVGFileDCImpl::DoDrawCheckMark(wxCoord x1, wxCoord y1, wxCoord width, wxCoord height)
 200 {
 201     wxDCImpl::DoDrawCheckMark (x1,y1,width,height) ;
 202 }
 203
 204
 205 void wxSVGFileDCImpl::DoDrawText(const wxString& text, wxCoord x1, wxCoord y1)
 206 {
 207     DoDrawRotatedText(text, x1,y1,0.0);
 208     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawText Call executed")) ;
 209 }
 210
 211
 212 void wxSVGFileDCImpl::DoDrawRotatedText(const wxString& sText, wxCoord x, wxCoord y, double angle)
 213 {
 214     //known bug; if the font is drawn in a scaled DC, it will not behave exactly as wxMSW
 215     if (m_graphics_changed) NewGraphics ();
 216     wxString s, sTmp;
 217
 218     // calculate bounding box
 219     wxCoord w, h, desc ;
 220     DoGetTextExtent(sText, &w, &h, &desc);
 221
 222     double rad = DegToRad(angle);
 223
 224     // wxT("upper left") and wxT("upper right")
 225     CalcBoundingBox(x, y);
 226     CalcBoundingBox((wxCoord)(x + w*cos(rad)), (wxCoord)(y - h*sin(rad)));
 227
 228     // wxT("bottom left") and wxT("bottom right")
 229     x += (wxCoord)(h*sin(rad));
 230     y += (wxCoord)(h*cos(rad));
 231     CalcBoundingBox(x, y);
 232     CalcBoundingBox((wxCoord)(x + h*sin(rad)), (wxCoord)(y + h*cos(rad)));
 233
 234     if (m_backgroundMode == wxBRUSHSTYLE_SOLID)
 235     {
 236         // draw background first
 237         // just like DoDrawRectangle except we pass the text color to it and set the border to a 1 pixel wide text background
 238
 239         wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::Draw Rotated Text Call plotting text background")) ;
 240         sTmp.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\"  "), x,y+desc-h, w, h );
 241         s = sTmp + wxT("style=\"fill:#") + wxColStr (m_textBackgroundColour) + wxT("; ") ;
 242         s = s + wxT("stroke-width:1; stroke:#") + wxColStr (m_textBackgroundColour) + wxT("; ") ;
 243         sTmp.Printf ( wxT("\" transform=\"rotate( %.2g %d %d )  \">"), -angle, x,y ) ;
 244         s = s + sTmp + newline ;
 245         write(s);
 246     }
 247     //now do the text itself
 248     s.Printf (wxT(" <text x=\"%d\" y=\"%d\" "),x,y );
 249
 250     sTmp = m_font.GetFaceName () ;
 251     if (sTmp.Len () > 0)  s = s + wxT("style=\"font-family:") + sTmp + wxT("; ");
 252     else s = s + wxT("style=\" ") ;
 253
 254     wxString fontweights [3] = { wxT("normal"), wxT("lighter"), wxT("bold") };
 255     s = s + wxT("font-weight:") + fontweights[m_font.GetWeight() - wxNORMAL] + semicolon + space;
 256
 257     wxString fontstyles [5] = { wxT("normal"), wxT("style error"), wxT("style error"), wxT("italic"), wxT("oblique") };
 258     s = s + wxT("font-style:") + fontstyles[m_font.GetStyle() - wxNORMAL] + semicolon  + space;
 259
 260     sTmp.Printf (wxT("font-size:%dpt; fill:#"), m_font.GetPointSize () );
 261     s = s + sTmp ;
 262     s = s + wxColStr (m_textForegroundColour) + wxT("; stroke:#") + wxColStr (m_textForegroundColour) + wxT("; ") ;
 263     sTmp.Printf ( wxT("stroke-width:0;\"  transform=\"rotate( %.2g %d %d )  \" >"),  -angle, x,y ) ;
 264     s = s + sTmp + sText + wxT("</text> ") + newline ;
 265     if (m_OK)
 266     {
 267         write(s);
 268     }
 269     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawRotatedText Call executed")) ;
 270
 271 }
 272
 273
 274 void wxSVGFileDCImpl::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 275 {
 276     DoDrawRoundedRectangle(x, y, width, height, 0)  ;
 277 }
 278
 279
 280 void wxSVGFileDCImpl::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
 281
 282 {
 283     if (m_graphics_changed) NewGraphics ();
 284     wxString s ;
 285
 286     s.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" rx=\"%.2g\" "),
 287                x, y, width, height, radius );
 288
 289     s = s + wxT(" /> ") + newline ;
 290     write(s);
 291
 292     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawRoundedRectangle Call executed")) ;
 293     CalcBoundingBox(x, y) ;
 294     CalcBoundingBox(x + width, y + height) ;
 295
 296 }
 297
 298
 299 void wxSVGFileDCImpl::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
 300 {
 301     if (m_graphics_changed) NewGraphics ();
 302     wxString s, sTmp ;
 303     s = wxT("<polygon style=\"") ;
 304     if ( fillStyle == wxODDEVEN_RULE )
 305         s = s + wxT("fill-rule:evenodd; ");
 306     else
 307         s = s + wxT("fill-rule:nonzero; ");
 308
 309     s = s  + wxT("\" \npoints=\"") ;
 310
 311     for (int i = 0; i < n;  i++)
 312     {
 313         sTmp.Printf ( wxT("%d,%d"), points [i].x+xoffset, points[i].y+yoffset );
 314         s = s + sTmp + newline ;
 315         CalcBoundingBox ( points [i].x+xoffset, points[i].y+yoffset);
 316     }
 317     s = s + wxT("\" /> ") ;
 318     s = s + newline ;
 319     write(s);
 320
 321     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawPolygon Call executed")) ;
 322 }
 323
 324
 325 void wxSVGFileDCImpl::DoDrawEllipse (wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 326
 327 {
 328     if (m_graphics_changed) NewGraphics ();
 329
 330     int rh = height /2 ;
 331     int rw = width  /2 ;
 332
 333     wxString s;
 334     s.Printf ( wxT("<ellipse cx=\"%d\" cy=\"%d\" rx=\"%d\" ry=\"%d\" "), x+rw,y+rh, rw, rh );
 335     s = s + wxT(" /> ") + newline ;
 336
 337     write(s);
 338
 339     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawEllipse Call executed")) ;
 340     CalcBoundingBox(x, y) ;
 341     CalcBoundingBox(x + width, y + height) ;
 342 }
 343
 344
 345 void wxSVGFileDCImpl::DoDrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc, wxCoord yc)
 346 {
 347     /* Draws an arc of a circle, centred on (xc, yc), with starting point
 348     (x1, y1) and ending at (x2, y2). The current pen is used for the outline
 349     and the current brush for filling the shape.
 350
 351     The arc is drawn in an anticlockwise direction from the start point to
 352     the end point.
 353
 354     Might be better described as Pie drawing */
 355
 356     if (m_graphics_changed) NewGraphics ();
 357     wxString s ;
 358
 359     // we need the radius of the circle which has two estimates
 360     double r1 = sqrt ( double( (x1-xc)*(x1-xc) ) + double( (y1-yc)*(y1-yc) ) );
 361     double r2 = sqrt ( double( (x2-xc)*(x2-xc) ) + double( (y2-yc)*(y2-yc) ) );
 362
 363     wxASSERT_MSG( (fabs ( r2-r1 ) <= 3), wxT("wxSVGFileDC::DoDrawArc Error in getting radii of circle")) ;
 364     if ( fabs ( r2-r1 ) > 3 )    //pixels
 365     {
 366         s = wxT("<!--- wxSVGFileDC::DoDrawArc Error in getting radii of circle --> \n") ;
 367         write(s);
 368     }
 369
 370     double theta1 = atan2((double)(yc-y1),(double)(x1-xc));
 371     if ( theta1 < 0 ) theta1 = theta1 + M_PI * 2;
 372     double theta2 = atan2((double)(yc-y2), (double)(x2-xc));
 373     if ( theta2 < 0 ) theta2 = theta2 + M_PI * 2;
 374     if ( theta2 < theta1 ) theta2 = theta2 + M_PI *2 ;
 375
 376     int fArc  ;                  // flag for large or small arc 0 means less than 180 degrees
 377     if ( fabs(theta2 - theta1) > M_PI ) fArc = 1; else fArc = 0 ;
 378
 379     int fSweep = 0 ;             // flag for sweep always 0
 380
 381     s.Printf ( wxT("<path d=\"M%d %d A%.2g %.2g 0.0 %d %d %d %d L%d %d z "),
 382         x1,y1, r1, r2, fArc, fSweep, x2, y2, xc, yc );
 383
 384     // the z means close the path and fill
 385     s = s + wxT(" \" /> ") + newline ;
 386
 387
 388     if (m_OK)
 389     {
 390         write(s);
 391     }
 392
 393     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawArc Call executed")) ;
 394 }
 395
 396
 397 void wxSVGFileDCImpl::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
 398 {
 399     /*
 400     Draws an arc of an ellipse. The current pen is used for drawing the arc
 401     and the current brush is used for drawing the pie. This function is
 402     currently only available for X window and PostScript device contexts.
 403
 404     x and y specify the x and y coordinates of the upper-left corner of the
 405     rectangle that contains the ellipse.
 406
 407     width and height specify the width and height of the rectangle that
 408     contains the ellipse.
 409
 410     start and end specify the start and end of the arc relative to the
 411     three-o'clock position from the center of the rectangle. Angles are
 412     specified in degrees (360 is a complete circle). Positive values mean
 413     counter-clockwise motion. If start is equal to end, a complete ellipse
 414     will be drawn. */
 415
 416     //known bug: SVG draws with the current pen along the radii, but this does not happen in wxMSW
 417
 418     if (m_graphics_changed) NewGraphics ();
 419
 420     wxString s ;
 421     //radius
 422     double rx = w / 2 ;
 423     double ry = h / 2 ;
 424     // center
 425     double xc = x + rx ;
 426     double yc = y + ry ;
 427
 428     double xs, ys, xe, ye ;
 429     xs = xc + rx * cos (DegToRad(sa)) ;
 430     xe = xc + rx * cos (DegToRad(ea)) ;
 431     ys = yc - ry * sin (DegToRad(sa)) ;
 432     ye = yc - ry * sin (DegToRad(ea)) ;
 433
 434     ///now same as circle arc...
 435
 436     double theta1 = atan2(ys-yc, xs-xc);
 437     double theta2 = atan2(ye-yc, xe-xc);
 438
 439     int fArc  ;                  // flag for large or small arc 0 means less than 180 degrees
 440     if ( (theta2 - theta1) > 0 ) fArc = 1; else fArc = 0 ;
 441
 442     int fSweep ;
 443     if ( fabs(theta2 - theta1) > M_PI) fSweep = 1; else fSweep = 0 ;
 444
 445     s.Printf ( wxT("<path d=\"M%d %d A%d %d 0.0 %d %d  %d %d L %d %d z "),
 446         int(xs), int(ys), int(rx), int(ry),
 447         fArc, fSweep, int(xe), int(ye), int(xc), int(yc)  );
 448
 449
 450     s = s + wxT(" \" /> ") + newline ;
 451
 452     if (m_OK)
 453     {
 454         write(s);
 455     }
 456
 457     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawEllipticArc Call executed")) ;
 458 }
 459
 460
 461 void wxSVGFileDCImpl::DoGetTextExtent(const wxString& string, wxCoord *w, wxCoord *h, wxCoord *descent , wxCoord *externalLeading , const wxFont *font) const
 462
 463 {
 464     wxScreenDC sDC ;
 465
 466     sDC.SetFont (m_font);
 467     if ( font != NULL ) sDC.SetFont ( *font );
 468     sDC.GetTextExtent(string, w,  h, descent, externalLeading );
 469     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetTextExtent Call executed")) ;
 470 }
 471
 472
 473 wxCoord wxSVGFileDCImpl::GetCharHeight() const
 474
 475 {
 476     wxScreenDC sDC ;
 477     sDC.SetFont (m_font);
 478
 479     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetCharHeight Call executing")) ;
 480     return ( sDC.GetCharHeight() );
 481
 482 }
 483
 484
 485 wxCoord wxSVGFileDCImpl::GetCharWidth() const
 486 {
 487     wxScreenDC sDC ;
 488     sDC.SetFont (m_font);
 489
 490     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetCharWidth Call executing")) ;
 491     return ( sDC.GetCharWidth() ) ;
 492
 493 }
 494
 495
 496 /// Set Functions /////////////////////////////////////////////////////////////////
 497 void wxSVGFileDCImpl::SetBackground( const wxBrush &brush )
 498 {
 499
 500     m_backgroundBrush = brush;
 501     return;
 502 }
 503
 504
 505 void wxSVGFileDCImpl::SetBackgroundMode( int mode )
 506 {
 507     m_backgroundMode = mode;
 508     return;
 509 }
 510
 511
 512 void wxSVGFileDCImpl::SetBrush(const wxBrush& brush)
 513
 514 {
 515     m_brush = brush ;
 516
 517     m_graphics_changed = TRUE ;
 518     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetBrush Call executed")) ;
 519 }
 520
 521
 522 void wxSVGFileDCImpl::SetPen(const wxPen& pen)
 523 {
 524     // width, color, ends, joins : currently implemented
 525     // dashes, stipple :  not implemented
 526     m_pen = pen ;
 527
 528     m_graphics_changed = TRUE ;
 529     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetPen Call executed")) ;
 530 }
 531
 532 void wxSVGFileDCImpl::NewGraphics ()
 533 {
 534
 535     int w = m_pen.GetWidth ();
 536     wxColour c = m_pen.GetColour () ;
 537
 538     wxString s, sBrush, sPenCap, sPenJoin, sPenStyle, sLast, sWarn;
 539
 540     sBrush = wxT("</g>\n<g style=\"") + wxBrushString ( m_brush.GetColour (), m_brush.GetStyle () )
 541              + wxT("  stroke:#") + wxColStr (c) + wxT("; ") ;
 542
 543     switch ( m_pen.GetCap () )
 544     {
 545         case  wxCAP_PROJECTING :
 546             sPenCap = wxT("stroke-linecap:square; ") ;
 547             break ;
 548         case  wxCAP_BUTT :
 549             sPenCap = wxT("stroke-linecap:butt; ") ;
 550             break ;
 551         case    wxCAP_ROUND :
 552         default :
 553             sPenCap = wxT("stroke-linecap:round; ") ;
 554     };
 555     switch ( m_pen.GetJoin () )
 556     {
 557         case  wxJOIN_BEVEL :
 558             sPenJoin = wxT("stroke-linejoin:bevel; ") ;
 559             break ;
 560         case  wxJOIN_MITER :
 561             sPenJoin = wxT("stroke-linejoin:miter; ") ;
 562             break ;
 563         case    wxJOIN_ROUND :
 564         default :
 565             sPenJoin = wxT("stroke-linejoin:round; ") ;
 566     };
 567
 568     switch ( m_pen.GetStyle () )
 569     {
 570         case  wxPENSTYLE_SOLID :
 571             sPenStyle = wxT("stroke-opacity:1.0; stroke-opacity:1.0; ") ;
 572             break ;
 573         case  wxPENSTYLE_TRANSPARENT :
 574             sPenStyle = wxT("stroke-opacity:0.0; stroke-opacity:0.0; ") ;
 575             break ;
 576         default :
 577             wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::SetPen Call called to set a Style which is not available")) ;
 578             sWarn = sWarn + wxT("<!--- wxSVGFileDC::SetPen Call called to set a Style which is not available --> \n") ;
 579     }
 580
 581     sLast.Printf( wxT("stroke-width:%d\" \n   transform=\"translate(%.2g %.2g) scale(%.2g %.2g)\">"),
 582                   w, (double)m_logicalOriginX, m_logicalOriginY, m_scaleX, m_scaleY  );
 583
 584     s = sBrush + sPenCap + sPenJoin + sPenStyle + sLast + newline + sWarn;
 585     write(s);
 586     m_graphics_changed = FALSE ;
 587     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::NewGraphics Call executed")) ;
 588 }
 589
 590
 591 void wxSVGFileDCImpl::SetFont(const wxFont& font)
 592
 593 {
 594     m_font = font ;
 595
 596     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetFont Call executed")) ;
 597 }
 598
 599
 600 // export a bitmap as a raster image in png
 601 bool wxSVGFileDCImpl::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 602                          wxDC* source, wxCoord xsrc, wxCoord ysrc,
 603                          int logicalFunc /*= wxCOPY*/, bool useMask /*= FALSE*/,
 604                          wxCoord /*xsrcMask = -1*/, wxCoord /*ysrcMask = -1*/)
 605 {
 606     if (logicalFunc != wxCOPY)
 607     {
 608         wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::DoBlit Call requested nonCopy mode; this is not possible")) ;
 609         return FALSE ;
 610     }
 611     if (useMask != FALSE)
 612     {
 613         wxASSERT_MSG(FALSE, wxT("wxSVGFileDC::DoBlit Call requested False mask ; this is not possible")) ;
 614         return FALSE ;
 615     }
 616     wxBitmap myBitmap (width, height) ;
 617     wxMemoryDC memDC;
 618     memDC.SelectObject( myBitmap );
 619     memDC.Blit(0, 0, width, height, source, xsrc, ysrc);
 620     memDC.SelectObject( wxNullBitmap );
 621     DoDrawBitmap(myBitmap, xdest, ydest);
 622     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoBlit Call executed")) ;
 623     return FALSE ;
 624 }
 625
 626 void wxSVGFileDCImpl::DoDrawIcon(const class wxIcon & myIcon, wxCoord x, wxCoord y)
 627 {
 628     wxBitmap myBitmap (myIcon.GetWidth(), myIcon.GetHeight() ) ;
 629     wxMemoryDC memDC;
 630     memDC.SelectObject( myBitmap );
 631     memDC.DrawIcon(myIcon,0,0);
 632     memDC.SelectObject( wxNullBitmap );
 633     DoDrawBitmap(myBitmap, x, y);
 634     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawIcon Call executed")) ;
 635     return ;
 636 }
 637
 638 void wxSVGFileDCImpl::DoDrawBitmap(const class wxBitmap & bmp, wxCoord x, wxCoord y , bool  WXUNUSED(bTransparent) /*=0*/ )
 639 {
 640     if (m_graphics_changed) NewGraphics ();
 641
 642     wxString sTmp, s, sPNG ;
 643     if ( wxImage::FindHandler(wxBITMAP_TYPE_PNG) == NULL )
 644         wxImage::AddHandler(new wxPNGHandler);
 645
 646 // create suitable file name
 647     sTmp.Printf ( wxT("_image%d.png"), m_sub_images);
 648     sPNG = m_filename.BeforeLast(wxT('.')) + sTmp;
 649     while (wxFile::Exists(sPNG) )
 650     {
 651         m_sub_images ++ ;
 652         sTmp.Printf ( wxT("_image%d.png"), m_sub_images);
 653         sPNG = m_filename.BeforeLast(wxT('.')) + sTmp;
 654     }
 655
 656 //create copy of bitmap (wxGTK doesn't like saving a constant bitmap)
 657     wxBitmap myBitmap = bmp ;
 658 //save it
 659     bool bPNG_OK = myBitmap.SaveFile(sPNG,wxBITMAP_TYPE_PNG);
 660
 661 // reference the bitmap from the SVG doc
 662 // only use filename & ext
 663     sPNG = sPNG.AfterLast(wxFileName::GetPathSeparator());
 664
 665 // refrence the bitmap from the SVG doc
 666     int w = myBitmap.GetWidth();
 667     int h = myBitmap.GetHeight();
 668     sTmp.Printf ( wxT(" <image x=\"%d\" y=\"%d\" width=\"%dpx\" height=\"%dpx\" "), x,y,w,h );
 669     s = s + sTmp ;
 670     sTmp.Printf ( wxT(" xlink:href=\"%s\"> \n"), sPNG.c_str() );
 671     s = s + sTmp + wxT("<title>Image from wxSVG</title>  </image>") + newline;
 672
 673     if (m_OK && bPNG_OK)
 674     {
 675         write(s);
 676     }
 677     m_OK = m_outfile->Ok () && bPNG_OK;
 678     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawBitmap Call executed")) ;
 679
 680     return  ;
 681 }
 682
 683 void wxSVGFileDCImpl::write(const wxString &s)
 684 {
 685     const wxCharBuffer buf = s.utf8_str();
 686     m_outfile->Write(buf, strlen((const char *)buf));
 687     m_OK = m_outfile->Ok();
 688 }
 689
 690
 691 #ifdef __BORLANDC__
 692 #pragma warn .rch
 693 #pragma warn .ccc
 694 #endif
 695
 696 #endif // wxUSE_SVG
 697