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