src/common/dcsvg.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/svg.cpp
   3 // Purpose:     SVG sample
   4 // Author:      Chris Elliott
   5 // Modified by:
   6 // RCS-ID:      $Id$
   7 // Licence:     wxWindows licence
   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 // ----------------------------------------------------------
  35 // Global utilities
  36 // ----------------------------------------------------------
  37
  38 namespace
  39 {
  40
  41 inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
  42
  43 wxString wxBrushString ( wxColour c, int style )
  44 {
  45     wxString s = wxT("fill:") + c.GetAsString(wxC2S_HTML_SYNTAX)  + wxT("; ");
  46     switch ( style )
  47     {
  48         case wxBRUSHSTYLE_SOLID :
  49             s = s + wxT("fill-opacity:1.0; ");
  50             break;
  51         case wxBRUSHSTYLE_TRANSPARENT:
  52             s = s + wxT("fill-opacity:0.0; ");
  53             break;
  54
  55         default :
  56             wxASSERT_MSG(false, wxT("wxSVGFileDC::Requested Brush Style not available"));
  57
  58     }
  59     s = s + wxT("\n");
  60     return s;
  61 }
  62
  63 // This function returns a string representation of a floating point number in
  64 // C locale (i.e. always using "." for the decimal separator) and with the
  65 // fixed precision (which is 2 for some unknown reason but this is what it was
  66 // in this code originally).
  67 inline wxString NumStr(double f)
  68 {
  69     return wxString::FromCDouble(f, 2);
  70 }
  71
  72 } // anonymous namespace
  73
  74 // ----------------------------------------------------------
  75 // wxSVGFileDCImpl
  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\"?>") + wxString(wxT("\n"));
 120         write(s);
 121         s = wxT("<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 20010904//EN\" ") + wxString(wxT("\n"));
 122         write(s);
 123         s = wxT("\"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd\"> ") + wxString(wxT("\n"));
 124         write(s);
 125         s = wxT("<svg xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" ") + wxString(wxT("\n"));
 126         write(s);
 127         s.Printf( wxT("    width=\"%scm\" height=\"%scm\" viewBox=\"0 0 %d %d \"> \n"), NumStr(float(Width)/dpi*2.54), NumStr(float(Height)/dpi*2.54), Width, Height );
 128         write(s);
 129         s = wxT("<title>SVG Picture created as ") + wxFileName(filename).GetFullName() + wxT(" </title>") + wxT("\n");
 130         write(s);
 131         s = wxString (wxT("<desc>Picture generated by wxSVG ")) + wxSVGVersion + wxT(" </desc>")+ wxT("\n");
 132         write(s);
 133         s =  wxT("<g style=\"fill:black; stroke:black; stroke-width:1\">") + wxString(wxT("\n"));
 134         write(s);
 135     }
 136 }
 137
 138 wxSVGFileDCImpl::~wxSVGFileDCImpl()
 139 {
 140     wxString s = wxT("</g> \n</svg> \n");
 141     write(s);
 142     delete m_outfile;
 143 }
 144
 145 void wxSVGFileDCImpl::DoGetSizeMM( int *width, int *height ) const
 146 {
 147     if (width)
 148         *width = wxRound( (double)m_width / m_mm_to_pix_x );
 149
 150     if (height)
 151         *height = wxRound( (double)m_height / m_mm_to_pix_y );
 152 }
 153
 154 wxSize wxSVGFileDCImpl::GetPPI() const
 155 {
 156     return wxSize( wxRound(m_dpi), wxRound(m_dpi) );
 157 }
 158
 159 void wxSVGFileDCImpl::DoDrawLine (wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 160 {
 161     if (m_graphics_changed) NewGraphics ();
 162     wxString s;
 163     s.Printf ( wxT("<path d=\"M%d %d L%d %d\" /> \n"), x1,y1,x2,y2 );
 164     if (m_OK)
 165     {
 166         write(s);
 167     }
 168     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawLine Call executed"));
 169     CalcBoundingBox(x1, y1);
 170     CalcBoundingBox(x2, y2);
 171     return;
 172 }
 173
 174 void wxSVGFileDCImpl::DoDrawLines(int n, wxPoint points[], wxCoord xoffset , wxCoord yoffset )
 175 {
 176     for ( int i = 1; i < n; i++ )
 177     {
 178         DoDrawLine ( points [i-1].x + xoffset, points [i-1].y + yoffset,
 179             points [ i ].x + xoffset, points [ i ].y + yoffset );
 180     }
 181 }
 182
 183 void wxSVGFileDCImpl::DoDrawPoint (wxCoord x1, wxCoord y1)
 184 {
 185     wxString s;
 186     if (m_graphics_changed) NewGraphics ();
 187     s = wxT("<g style = \"stroke-linecap:round;\" > ") + wxString(wxT("\n"));
 188     write(s);
 189     DoDrawLine ( x1,y1,x1,y1 );
 190     s = wxT("</g>");
 191     write(s);
 192 }
 193
 194 void wxSVGFileDCImpl::DoDrawCheckMark(wxCoord x1, wxCoord y1, wxCoord width, wxCoord height)
 195 {
 196     wxDCImpl::DoDrawCheckMark (x1,y1,width,height);
 197 }
 198
 199 void wxSVGFileDCImpl::DoDrawText(const wxString& text, wxCoord x1, wxCoord y1)
 200 {
 201     DoDrawRotatedText(text, x1,y1,0.0);
 202     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawText Call executed"));
 203 }
 204
 205 void wxSVGFileDCImpl::DoDrawRotatedText(const wxString& sText, wxCoord x, wxCoord y, double angle)
 206 {
 207     //known bug; if the font is drawn in a scaled DC, it will not behave exactly as wxMSW
 208     if (m_graphics_changed) NewGraphics ();
 209     wxString s, sTmp;
 210
 211     // calculate bounding box
 212     wxCoord w, h, desc;
 213     DoGetTextExtent(sText, &w, &h, &desc);
 214
 215     double rad = DegToRad(angle);
 216
 217     // wxT("upper left") and wxT("upper right")
 218     CalcBoundingBox(x, y);
 219     CalcBoundingBox((wxCoord)(x + w*cos(rad)), (wxCoord)(y - h*sin(rad)));
 220
 221     // wxT("bottom left") and wxT("bottom right")
 222     x += (wxCoord)(h*sin(rad));
 223     y += (wxCoord)(h*cos(rad));
 224     CalcBoundingBox(x, y);
 225     CalcBoundingBox((wxCoord)(x + h*sin(rad)), (wxCoord)(y + h*cos(rad)));
 226
 227     if (m_backgroundMode == wxBRUSHSTYLE_SOLID)
 228     {
 229         // draw background first
 230         // just like DoDrawRectangle except we pass the text color to it and set the border to a 1 pixel wide text background
 231
 232         wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::Draw Rotated Text Call plotting text background"));
 233         sTmp.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\"  "), x,y+desc-h, w, h );
 234         s = sTmp + wxT("style=\"fill:") + m_textBackgroundColour.GetAsString(wxC2S_HTML_SYNTAX) + wxT("; ");
 235         s = s + wxT("stroke-width:1; stroke:") + m_textBackgroundColour.GetAsString(wxC2S_HTML_SYNTAX) + wxT("; ");
 236         sTmp.Printf ( wxT("\" transform=\"rotate( %s %d %d )  \">"), NumStr(-angle), x,y );
 237         s = s + sTmp + wxT("\n");
 238         write(s);
 239     }
 240     //now do the text itself
 241     s.Printf (wxT(" <text x=\"%d\" y=\"%d\" "),x,y );
 242
 243     sTmp = m_font.GetFaceName ();
 244     if (sTmp.Len () > 0)  s = s + wxT("style=\"font-family:") + sTmp + wxT("; ");
 245     else s = s + wxT("style=\" ");
 246
 247     wxString fontweights [3] = { wxT("normal"), wxT("lighter"), wxT("bold") };
 248     s = s + wxT("font-weight:") + fontweights[m_font.GetWeight() - wxNORMAL] + wxT("; ");
 249
 250     wxString fontstyles [5] = { wxT("normal"), wxT("style error"), wxT("style error"), wxT("italic"), wxT("oblique") };
 251     s = s + wxT("font-style:") + fontstyles[m_font.GetStyle() - wxNORMAL] + wxT("; ");
 252
 253     sTmp.Printf (wxT("font-size:%dpt; fill:"), m_font.GetPointSize () );
 254     s = s + sTmp;
 255     s = s + m_textForegroundColour.GetAsString(wxC2S_HTML_SYNTAX) + wxT("; stroke:") + m_textForegroundColour.GetAsString(wxC2S_HTML_SYNTAX) + wxT("; ");
 256     sTmp.Printf ( wxT("stroke-width:0;\"  transform=\"rotate( %s %d %d )  \" >"),  NumStr(-angle), x,y );
 257     s = s + sTmp + sText + wxT("</text> ") + wxT("\n");
 258     if (m_OK)
 259     {
 260         write(s);
 261     }
 262     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DrawRotatedText Call executed"));
 263 }
 264
 265 void wxSVGFileDCImpl::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 266 {
 267     DoDrawRoundedRectangle(x, y, width, height, 0);
 268 }
 269
 270 void wxSVGFileDCImpl::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius )
 271
 272 {
 273     if (m_graphics_changed) NewGraphics ();
 274     wxString s;
 275
 276     s.Printf ( wxT(" <rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" rx=\"%s\" "),
 277             x, y, width, height, NumStr(radius) );
 278
 279     s = s + wxT(" /> ") + wxT("\n");
 280     write(s);
 281
 282     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawRoundedRectangle Call executed"));
 283     CalcBoundingBox(x, y);
 284     CalcBoundingBox(x + width, y + height);
 285 }
 286
 287 void wxSVGFileDCImpl::DoDrawPolygon(int n, wxPoint points[],
 288                                     wxCoord xoffset, wxCoord yoffset,
 289                                     wxPolygonFillMode fillStyle)
 290 {
 291     if (m_graphics_changed) NewGraphics ();
 292     wxString s, sTmp;
 293     s = wxT("<polygon style=\"");
 294     if ( fillStyle == wxODDEVEN_RULE )
 295         s = s + wxT("fill-rule:evenodd; ");
 296     else
 297         s = s + wxT("fill-rule:nonzero; ");
 298
 299     s = s  + wxT("\" \npoints=\"");
 300
 301     for (int i = 0; i < n;  i++)
 302     {
 303         sTmp.Printf ( wxT("%d,%d"), points [i].x+xoffset, points[i].y+yoffset );
 304         s = s + sTmp + wxT("\n");
 305         CalcBoundingBox ( points [i].x+xoffset, points[i].y+yoffset);
 306     }
 307     s = s + wxT("\" /> ");
 308     s = s + wxT("\n");
 309     write(s);
 310
 311     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawPolygon Call executed"));
 312 }
 313
 314 void wxSVGFileDCImpl::DoDrawEllipse (wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 315
 316 {
 317     if (m_graphics_changed) NewGraphics ();
 318
 319     int rh = height /2;
 320     int rw = width  /2;
 321
 322     wxString s;
 323     s.Printf ( wxT("<ellipse cx=\"%d\" cy=\"%d\" rx=\"%d\" ry=\"%d\" "), x+rw,y+rh, rw, rh );
 324     s = s + wxT(" /> ") + wxT("\n");
 325
 326     write(s);
 327
 328     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawEllipse Call executed"));
 329     CalcBoundingBox(x, y);
 330     CalcBoundingBox(x + width, y + height);
 331 }
 332
 333 void wxSVGFileDCImpl::DoDrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc, wxCoord yc)
 334 {
 335     /* Draws an arc of a circle, centred on (xc, yc), with starting point
 336     (x1, y1) and ending at (x2, y2). The current pen is used for the outline
 337     and the current brush for filling the shape.
 338
 339     The arc is drawn in an anticlockwise direction from the start point to
 340     the end point.
 341
 342     Might be better described as Pie drawing */
 343
 344     if (m_graphics_changed) NewGraphics ();
 345     wxString s;
 346
 347     // we need the radius of the circle which has two estimates
 348     double r1 = sqrt ( double( (x1-xc)*(x1-xc) ) + double( (y1-yc)*(y1-yc) ) );
 349     double r2 = sqrt ( double( (x2-xc)*(x2-xc) ) + double( (y2-yc)*(y2-yc) ) );
 350
 351     wxASSERT_MSG( (fabs ( r2-r1 ) <= 3), wxT("wxSVGFileDC::DoDrawArc Error in getting radii of circle"));
 352     if ( fabs ( r2-r1 ) > 3 )    //pixels
 353     {
 354         s = wxT("<!--- wxSVGFileDC::DoDrawArc Error in getting radii of circle --> \n");
 355         write(s);
 356     }
 357
 358     double theta1 = atan2((double)(yc-y1),(double)(x1-xc));
 359     if ( theta1 < 0 ) theta1 = theta1 + M_PI * 2;
 360     double theta2 = atan2((double)(yc-y2), (double)(x2-xc));
 361     if ( theta2 < 0 ) theta2 = theta2 + M_PI * 2;
 362     if ( theta2 < theta1 ) theta2 = theta2 + M_PI *2;
 363
 364     int fArc;                  // flag for large or small arc 0 means less than 180 degrees
 365     if ( fabs(theta2 - theta1) > M_PI ) fArc = 1; else fArc = 0;
 366
 367     int fSweep = 0;             // flag for sweep always 0
 368
 369     s.Printf ( wxT("<path d=\"M%d %d A%s %s 0.0 %d %d %d %d L%d %d z "),
 370         x1,y1, NumStr(r1), NumStr(r2), fArc, fSweep, x2, y2, xc, yc );
 371
 372     // the z means close the path and fill
 373     s = s + wxT(" \" /> ") + wxT("\n");
 374
 375
 376     if (m_OK)
 377     {
 378         write(s);
 379     }
 380
 381     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawArc Call executed"));
 382 }
 383
 384 void wxSVGFileDCImpl::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
 385 {
 386     /*
 387     Draws an arc of an ellipse. The current pen is used for drawing the arc
 388     and the current brush is used for drawing the pie. This function is
 389     currently only available for X window and PostScript device contexts.
 390
 391     x and y specify the x and y coordinates of the upper-left corner of the
 392     rectangle that contains the ellipse.
 393
 394     width and height specify the width and height of the rectangle that
 395     contains the ellipse.
 396
 397     start and end specify the start and end of the arc relative to the
 398     three-o'clock position from the center of the rectangle. Angles are
 399     specified in degrees (360 is a complete circle). Positive values mean
 400     counter-clockwise motion. If start is equal to end, a complete ellipse
 401     will be drawn. */
 402
 403     //known bug: SVG draws with the current pen along the radii, but this does not happen in wxMSW
 404
 405     if (m_graphics_changed) NewGraphics ();
 406
 407     wxString s;
 408     //radius
 409     double rx = w / 2;
 410     double ry = h / 2;
 411     // center
 412     double xc = x + rx;
 413     double yc = y + ry;
 414
 415     double xs, ys, xe, ye;
 416     xs = xc + rx * cos (DegToRad(sa));
 417     xe = xc + rx * cos (DegToRad(ea));
 418     ys = yc - ry * sin (DegToRad(sa));
 419     ye = yc - ry * sin (DegToRad(ea));
 420
 421     ///now same as circle arc...
 422
 423     double theta1 = atan2(ys-yc, xs-xc);
 424     double theta2 = atan2(ye-yc, xe-xc);
 425
 426     int fArc;                  // flag for large or small arc 0 means less than 180 degrees
 427     if ( (theta2 - theta1) > 0 ) fArc = 1; else fArc = 0;
 428
 429     int fSweep;
 430     if ( fabs(theta2 - theta1) > M_PI) fSweep = 1; else fSweep = 0;
 431
 432     s.Printf ( wxT("<path d=\"M%d %d A%d %d 0.0 %d %d  %d %d L %d %d z "),
 433         int(xs), int(ys), int(rx), int(ry),
 434         fArc, fSweep, int(xe), int(ye), int(xc), int(yc)  );
 435
 436
 437     s = s + wxT(" \" /> ") + wxT("\n");
 438
 439     if (m_OK)
 440     {
 441         write(s);
 442     }
 443
 444     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawEllipticArc Call executed"));
 445 }
 446
 447 void wxSVGFileDCImpl::DoGetTextExtent(const wxString& string, wxCoord *w, wxCoord *h, wxCoord *descent , wxCoord *externalLeading , const wxFont *font) const
 448
 449 {
 450     wxScreenDC sDC;
 451
 452     sDC.SetFont (m_font);
 453     if ( font != NULL ) sDC.SetFont ( *font );
 454     sDC.GetTextExtent(string, w,  h, descent, externalLeading );
 455     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetTextExtent Call executed"));
 456 }
 457
 458 wxCoord wxSVGFileDCImpl::GetCharHeight() const
 459
 460 {
 461     wxScreenDC sDC;
 462     sDC.SetFont (m_font);
 463
 464     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetCharHeight Call executing"));
 465     return ( sDC.GetCharHeight() );
 466
 467 }
 468
 469 wxCoord wxSVGFileDCImpl::GetCharWidth() const
 470 {
 471     wxScreenDC sDC;
 472     sDC.SetFont (m_font);
 473
 474     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::GetCharWidth Call executing"));
 475     return ( sDC.GetCharWidth() );
 476
 477 }
 478
 479
 480 // ----------------------------------------------------------
 481 // wxSVGFileDCImpl - set functions
 482 // ----------------------------------------------------------
 483
 484 void wxSVGFileDCImpl::SetBackground( const wxBrush &brush )
 485 {
 486
 487     m_backgroundBrush = brush;
 488     return;
 489 }
 490
 491
 492 void wxSVGFileDCImpl::SetBackgroundMode( int mode )
 493 {
 494     m_backgroundMode = mode;
 495     return;
 496 }
 497
 498
 499 void wxSVGFileDCImpl::SetBrush(const wxBrush& brush)
 500
 501 {
 502     m_brush = brush;
 503
 504     m_graphics_changed = true;
 505     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetBrush Call executed"));
 506 }
 507
 508
 509 void wxSVGFileDCImpl::SetPen(const wxPen& pen)
 510 {
 511     // width, color, ends, joins : currently implemented
 512     // dashes, stipple :  not implemented
 513     m_pen = pen;
 514
 515     m_graphics_changed = true;
 516     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetPen Call executed"));
 517 }
 518
 519 void wxSVGFileDCImpl::NewGraphics ()
 520 {
 521
 522     int w = m_pen.GetWidth ();
 523     wxColour c = m_pen.GetColour ();
 524
 525     wxString s, sBrush, sPenCap, sPenJoin, sPenStyle, sLast, sWarn;
 526
 527     sBrush = wxT("</g>\n<g style=\"") + wxBrushString ( m_brush.GetColour (), m_brush.GetStyle () )
 528             + wxT("  stroke:") + c.GetAsString(wxC2S_HTML_SYNTAX) + wxT("; ");
 529
 530     switch ( m_pen.GetCap () )
 531     {
 532         case  wxCAP_PROJECTING :
 533             sPenCap = wxT("stroke-linecap:square; ");
 534             break;
 535         case  wxCAP_BUTT :
 536             sPenCap = wxT("stroke-linecap:butt; ");
 537             break;
 538         case    wxCAP_ROUND :
 539         default :
 540             sPenCap = wxT("stroke-linecap:round; ");
 541     };
 542     switch ( m_pen.GetJoin () )
 543     {
 544         case  wxJOIN_BEVEL :
 545             sPenJoin = wxT("stroke-linejoin:bevel; ");
 546             break;
 547         case  wxJOIN_MITER :
 548             sPenJoin = wxT("stroke-linejoin:miter; ");
 549             break;
 550         case    wxJOIN_ROUND :
 551         default :
 552             sPenJoin = wxT("stroke-linejoin:round; ");
 553     };
 554
 555     switch ( m_pen.GetStyle () )
 556     {
 557         case  wxPENSTYLE_SOLID :
 558             sPenStyle = wxT("stroke-opacity:1.0; stroke-opacity:1.0; ");
 559             break;
 560         case  wxPENSTYLE_TRANSPARENT :
 561             sPenStyle = wxT("stroke-opacity:0.0; stroke-opacity:0.0; ");
 562             break;
 563         default :
 564             wxASSERT_MSG(false, wxT("wxSVGFileDC::SetPen Call called to set a Style which is not available"));
 565             sWarn = sWarn + wxT("<!--- wxSVGFileDC::SetPen Call called to set a Style which is not available --> \n");
 566     }
 567
 568     sLast.Printf( wxT("stroke-width:%d\" \n   transform=\"translate(%s %s) scale(%s %s)\">"),
 569                 w, NumStr(m_logicalOriginX), NumStr(m_logicalOriginY), NumStr(m_scaleX), NumStr(m_scaleY)  );
 570
 571     s = sBrush + sPenCap + sPenJoin + sPenStyle + sLast + wxT("\n") + sWarn;
 572     write(s);
 573     m_graphics_changed = false;
 574     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::NewGraphics Call executed"));
 575 }
 576
 577
 578 void wxSVGFileDCImpl::SetFont(const wxFont& font)
 579
 580 {
 581     m_font = font;
 582
 583     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::SetFont Call executed"));
 584 }
 585
 586 // export a bitmap as a raster image in png
 587 bool wxSVGFileDCImpl::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
 588                         wxDC* source, wxCoord xsrc, wxCoord ysrc,
 589                         wxRasterOperationMode logicalFunc /*= wxCOPY*/, bool useMask /*= false*/,
 590                         wxCoord /*xsrcMask = -1*/, wxCoord /*ysrcMask = -1*/)
 591 {
 592     if (logicalFunc != wxCOPY)
 593     {
 594         wxASSERT_MSG(false, wxT("wxSVGFileDC::DoBlit Call requested nonCopy mode; this is not possible"));
 595         return false;
 596     }
 597     if (useMask != false)
 598     {
 599         wxASSERT_MSG(false, wxT("wxSVGFileDC::DoBlit Call requested false mask; this is not possible"));
 600         return false;
 601     }
 602     wxBitmap myBitmap (width, height);
 603     wxMemoryDC memDC;
 604     memDC.SelectObject( myBitmap );
 605     memDC.Blit(0, 0, width, height, source, xsrc, ysrc);
 606     memDC.SelectObject( wxNullBitmap );
 607     DoDrawBitmap(myBitmap, xdest, ydest);
 608     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoBlit Call executed"));
 609     return false;
 610 }
 611
 612 void wxSVGFileDCImpl::DoDrawIcon(const class wxIcon & myIcon, wxCoord x, wxCoord y)
 613 {
 614     wxBitmap myBitmap (myIcon.GetWidth(), myIcon.GetHeight() );
 615     wxMemoryDC memDC;
 616     memDC.SelectObject( myBitmap );
 617     memDC.DrawIcon(myIcon,0,0);
 618     memDC.SelectObject( wxNullBitmap );
 619     DoDrawBitmap(myBitmap, x, y);
 620     wxASSERT_MSG(!wxSVG_DEBUG, wxT("wxSVGFileDC::DoDrawIcon Call executed"));
 621     return;
 622 }
 623
 624 void wxSVGFileDCImpl::DoDrawBitmap(const class wxBitmap & bmp, wxCoord x, wxCoord y , bool  WXUNUSED(bTransparent) /*=0*/ )
 625 {
 626     if (m_graphics_changed) NewGraphics ();
 627
 628     wxString sTmp, s, sPNG;
 629     if ( wxImage::FindHandler(wxBITMAP_TYPE_PNG) == NULL )
 630         wxImage::AddHandler(new wxPNGHandler);
 631
 632 // create suitable file name
 633     sTmp.Printf ( wxT("_image%d.png"), m_sub_images);
 634     sPNG = m_filename.BeforeLast(wxT('.')) + sTmp;
 635     while (wxFile::Exists(sPNG) )
 636     {
 637         m_sub_images ++;
 638         sTmp.Printf ( wxT("_image%d.png"), m_sub_images);
 639         sPNG = m_filename.BeforeLast(wxT('.')) + sTmp;
 640     }
 641
 642 //create copy of bitmap (wxGTK doesn't like saving a constant bitmap)
 643     wxBitmap myBitmap = bmp;
 644 //save it
 645     bool bPNG_OK = myBitmap.SaveFile(sPNG,wxBITMAP_TYPE_PNG);
 646
 647 // reference the bitmap from the SVG doc
 648 // only use filename & ext
 649     sPNG = sPNG.AfterLast(wxFileName::GetPathSeparator());
 650
 651 // reference 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>") + wxT("\n");
 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 wxSVGFileDCImpl::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 #ifdef __BORLANDC__
 678 #pragma warn .rch
 679 #pragma warn .ccc
 680 #endif
 681
 682 #endif // wxUSE_SVG
 683