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