src/common/graphcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/graphcmn.cpp
   3 // Purpose:     graphics context methods common to all platforms
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #if defined(__BORLANDC__)
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_GRAPHICS_CONTEXT
  20
  21 #include "wx/graphics.h"
  22
  23 #ifndef WX_PRECOMP
  24     #include "wx/icon.h"
  25     #include "wx/bitmap.h"
  26     #include "wx/dcmemory.h"
  27     #include "wx/region.h"
  28 #endif
  29
  30 #if !defined(wxMAC_USE_CORE_GRAPHICS_BLEND_MODES)
  31 #define wxMAC_USE_CORE_GRAPHICS_BLEND_MODES 0
  32 #endif
  33
  34 //-----------------------------------------------------------------------------
  35 // constants
  36 //-----------------------------------------------------------------------------
  37
  38 static const double RAD2DEG = 180.0 / M_PI;
  39
  40 //-----------------------------------------------------------------------------
  41 // Local functions
  42 //-----------------------------------------------------------------------------
  43
  44 static inline double DegToRad(double deg)
  45 {
  46     return (deg * M_PI) / 180.0;
  47 }
  48
  49 //-----------------------------------------------------------------------------
  50
  51 IMPLEMENT_ABSTRACT_CLASS(wxGraphicsPath, wxObject)
  52
  53 wxPoint2DDouble wxGraphicsPath::GetCurrentPoint()
  54 {
  55     wxDouble x,y;
  56     GetCurrentPoint(x,y);
  57     return wxPoint2DDouble(x,y);
  58 }
  59
  60 void wxGraphicsPath::MoveToPoint( const wxPoint2DDouble& p)
  61 {
  62     MoveToPoint( p.m_x , p.m_y);
  63 }
  64
  65 void wxGraphicsPath::AddLineToPoint( const wxPoint2DDouble& p)
  66 {
  67     AddLineToPoint( p.m_x , p.m_y);
  68 }
  69
  70 void wxGraphicsPath::AddCurveToPoint( const wxPoint2DDouble& c1, const wxPoint2DDouble& c2, const wxPoint2DDouble& e)
  71 {
  72     AddCurveToPoint(c1.m_x, c1.m_y, c2.m_x, c2.m_y, e.m_x, e.m_y);
  73 }
  74
  75 void wxGraphicsPath::AddArc( const wxPoint2DDouble& c, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise)
  76 {
  77     AddArc(c.m_x, c.m_y, r, startAngle, endAngle, clockwise);
  78 }
  79
  80 //
  81 // Emulations
  82 //
  83
  84 void wxGraphicsPath::AddQuadCurveToPoint( wxDouble cx, wxDouble cy, wxDouble x, wxDouble y )
  85 {
  86     // calculate using degree elevation to a cubic bezier
  87     wxPoint2DDouble c1;
  88     wxPoint2DDouble c2;
  89
  90     wxPoint2DDouble start = GetCurrentPoint();
  91     wxPoint2DDouble end(x,y);
  92     wxPoint2DDouble c(cx,cy);
  93     c1 = wxDouble(1/3.0) * start + wxDouble(2/3.0) * c;
  94     c2 = wxDouble(2/3.0) * c + wxDouble(1/3.0) * end;
  95     AddCurveToPoint(c1.m_x,c1.m_y,c2.m_x,c2.m_y,x,y);
  96 }
  97
  98 void wxGraphicsPath::AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
  99 {
 100     MoveToPoint(x,y);
 101     AddLineToPoint(x,y+h);
 102     AddLineToPoint(x+w,y+h);
 103     AddLineToPoint(x+w,y);
 104     CloseSubpath();
 105 }
 106
 107 void wxGraphicsPath::AddCircle( wxDouble x, wxDouble y, wxDouble r )
 108 {
 109     MoveToPoint(x+r,y);
 110     AddArc( x,y,r,0,2*M_PI,false);
 111     CloseSubpath();
 112 }
 113
 114 // draws a an arc to two tangents connecting (current) to (x1,y1) and (x1,y1) to (x2,y2), also a straight line from (current) to (x1,y1)
 115 void wxGraphicsPath::AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )
 116 {
 117     wxPoint2DDouble current = GetCurrentPoint();
 118     wxPoint2DDouble p1(x1,y1);
 119     wxPoint2DDouble p2(x2,y2);
 120
 121     wxPoint2DDouble v1 = current - p1;
 122     v1.Normalize();
 123     wxPoint2DDouble v2 = p2 - p1;
 124     v2.Normalize();
 125
 126     wxDouble alpha = v1.GetVectorAngle() - v2.GetVectorAngle();
 127
 128     if ( alpha < 0 )
 129         alpha = 360 + alpha;
 130     // TODO obtuse angles
 131
 132     alpha = DegToRad(alpha);
 133
 134     wxDouble dist = r / sin(alpha/2) * cos(alpha/2);
 135     // calculate tangential points
 136     wxPoint2DDouble t1 = dist*v1 + p1;
 137     wxPoint2DDouble t2 = dist*v2 + p1;
 138
 139     wxPoint2DDouble nv1 = v1;
 140     nv1.SetVectorAngle(v1.GetVectorAngle()-90);
 141     wxPoint2DDouble c = t1 + r*nv1;
 142
 143     wxDouble a1 = v1.GetVectorAngle()+90;
 144     wxDouble a2 = v2.GetVectorAngle()-90;
 145
 146     AddLineToPoint(t1);
 147     AddArc(c.m_x,c.m_y,r,DegToRad(a1),DegToRad(a2),true);
 148     AddLineToPoint(p2);
 149 }
 150
 151 //-----------------------------------------------------------------------------
 152 // wxGraphicsContext Convenience Methods
 153 //-----------------------------------------------------------------------------
 154
 155 IMPLEMENT_ABSTRACT_CLASS(wxGraphicsContext, wxObject)
 156
 157 void wxGraphicsContext::DrawPath( const wxGraphicsPath *path, int fillStyle )
 158 {
 159     FillPath( path , fillStyle );
 160     StrokePath( path );
 161 }
 162
 163 void wxGraphicsContext::DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle )
 164 {
 165     Translate(x,y);
 166     Rotate( -angle );
 167     DrawText( str , 0, 0 );
 168     Rotate( angle );
 169     Translate(-x,-y);
 170 }
 171
 172 void wxGraphicsContext::StrokeLine( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2)
 173 {
 174     wxGraphicsPath* path = CreatePath();
 175     path->MoveToPoint(x1, y1);
 176     path->AddLineToPoint( x2, y2 );
 177     StrokePath( path );
 178     delete path;
 179 }
 180
 181 void wxGraphicsContext::DrawRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h)
 182 {
 183     wxGraphicsPath* path = CreatePath();
 184     path->AddRectangle( x , y , w , h );
 185     DrawPath( path );
 186     delete path;
 187 }
 188
 189 void wxGraphicsContext::DrawEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h)
 190 {
 191     wxGraphicsPath* path = CreatePath();
 192     if ( w == h )
 193     {
 194         path->AddCircle( x+w/2,y+w/2,w/2);
 195         DrawPath(path);
 196     }
 197     else
 198     {
 199         PushState();
 200         Translate(x+w/2,y+h/2);
 201         wxDouble factor = ((wxDouble) w) / h;
 202         Scale( factor , 1.0);
 203         path->AddCircle(0,0,h/2);
 204         DrawPath(path);
 205         PopState();
 206     }
 207     delete path;
 208 }
 209
 210 void wxGraphicsContext::DrawRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius)
 211 {
 212     wxGraphicsPath* path = CreatePath();
 213     if ( radius == 0)
 214     {
 215         path->AddRectangle( x , y , w , h );
 216         DrawPath( path );
 217     }
 218     else
 219     {
 220         PushState();
 221         Translate( x , y );
 222
 223         path->MoveToPoint(w, h / 2);
 224         path->AddArcToPoint(w, h, w / 2, h, radius);
 225         path->AddArcToPoint(0, h, 0, h / 2, radius);
 226         path->AddArcToPoint(0, 0, w / 2, 0, radius);
 227         path->AddArcToPoint(w, 0, w, h / 2, radius);
 228         path->CloseSubpath();
 229         DrawPath( path );
 230         PopState();
 231     }
 232     delete path;
 233 }
 234
 235 void wxGraphicsContext::StrokeLines( size_t n, const wxPoint2DDouble *points)
 236 {
 237     wxASSERT(n > 1);
 238     wxGraphicsPath* path = CreatePath();
 239     path->MoveToPoint(points[0].m_x, points[0].m_y);
 240     for ( size_t i = 1; i < n; ++i)
 241         path->AddLineToPoint( points[i].m_x, points[i].m_y );
 242     StrokePath( path );
 243     delete path;
 244 }
 245
 246 void wxGraphicsContext::DrawLines( size_t n, const wxPoint2DDouble *points, int fillStyle)
 247 {
 248     wxASSERT(n > 1);
 249     wxGraphicsPath* path = CreatePath();
 250     path->MoveToPoint(points[0].m_x, points[0].m_y);
 251     for ( size_t i = 1; i < n; ++i)
 252         path->AddLineToPoint( points[i].m_x, points[i].m_y );
 253     DrawPath( path , fillStyle);
 254     delete path;
 255 }
 256
 257 void wxGraphicsContext::StrokeLines( size_t n, const wxPoint2DDouble *beginPoints, const wxPoint2DDouble *endPoints)
 258 {
 259     wxASSERT(n > 0);
 260     wxGraphicsPath* path = CreatePath();
 261     for ( size_t i = 0; i < n; ++i)
 262     {
 263         path->MoveToPoint(beginPoints[i].m_x, beginPoints[i].m_y);
 264         path->AddLineToPoint( endPoints[i].m_x, endPoints[i].m_y );
 265     }
 266     StrokePath( path );
 267     delete path;
 268 }
 269
 270 IMPLEMENT_ABSTRACT_CLASS(wxGCDC, wxObject)
 271
 272 //-----------------------------------------------------------------------------
 273 // wxDC bridge class
 274 //-----------------------------------------------------------------------------
 275
 276 wxGCDC::wxGCDC()
 277 {
 278     Init();
 279 }
 280
 281 void wxGCDC::SetGraphicsContext( wxGraphicsContext* ctx )
 282 {
 283     delete m_graphicContext;
 284     m_graphicContext = ctx;
 285 }
 286
 287 wxGCDC::wxGCDC(const wxWindowDC& dc)
 288 {
 289     Init();
 290     m_graphicContext = wxGraphicsContext::Create(dc);
 291     m_ok = true;
 292     if ( dc.GetFont().Ok())
 293         m_graphicContext->SetFont(dc.GetFont());
 294     if ( dc.GetPen().Ok())
 295         m_graphicContext->SetPen(dc.GetPen());
 296     if ( dc.GetBrush().Ok())
 297         m_graphicContext->SetBrush(dc.GetBrush());
 298     m_graphicContext->SetTextColor(dc.GetTextForeground());
 299 }
 300
 301 void wxGCDC::Init()
 302 {
 303     m_ok = false;
 304     m_colour = true;
 305     m_mm_to_pix_x = mm2pt;
 306     m_mm_to_pix_y = mm2pt;
 307
 308     m_pen = *wxBLACK_PEN;
 309     m_font = *wxNORMAL_FONT;
 310     m_brush = *wxWHITE_BRUSH;
 311
 312     m_graphicContext = NULL;
 313 }
 314
 315
 316 wxGCDC::~wxGCDC()
 317 {
 318     delete m_graphicContext;
 319 }
 320
 321 void wxGCDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool WXUNUSED(useMask) )
 322 {
 323     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid DC") );
 324     wxCHECK_RET( bmp.Ok(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid bitmap") );
 325
 326     wxCoord xx = LogicalToDeviceX(x);
 327     wxCoord yy = LogicalToDeviceY(y);
 328     wxCoord w = bmp.GetWidth();
 329     wxCoord h = bmp.GetHeight();
 330     wxCoord ww = LogicalToDeviceXRel(w);
 331     wxCoord hh = LogicalToDeviceYRel(h);
 332
 333     m_graphicContext->DrawBitmap( bmp, xx , yy , ww , hh );
 334 }
 335
 336 void wxGCDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
 337 {
 338     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawIcon - invalid DC") );
 339     wxCHECK_RET( icon.Ok(), wxT("wxGCDC(cg)::DoDrawIcon - invalid icon") );
 340
 341     wxCoord xx = LogicalToDeviceX(x);
 342     wxCoord yy = LogicalToDeviceY(y);
 343     wxCoord w = icon.GetWidth();
 344     wxCoord h = icon.GetHeight();
 345     wxCoord ww = LogicalToDeviceXRel(w);
 346     wxCoord hh = LogicalToDeviceYRel(h);
 347
 348     m_graphicContext->DrawIcon( icon , xx, yy, ww, hh );
 349 }
 350
 351 void wxGCDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
 352 {
 353     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoSetClippingRegion - invalid DC") );
 354
 355     wxCoord xx, yy, ww, hh;
 356     xx = LogicalToDeviceX(x);
 357     yy = LogicalToDeviceY(y);
 358     ww = LogicalToDeviceXRel(width);
 359     hh = LogicalToDeviceYRel(height);
 360
 361     m_graphicContext->Clip( xx, yy, ww, hh );
 362     if ( m_clipping )
 363     {
 364         m_clipX1 = wxMax( m_clipX1, xx );
 365         m_clipY1 = wxMax( m_clipY1, yy );
 366         m_clipX2 = wxMin( m_clipX2, (xx + ww) );
 367         m_clipY2 = wxMin( m_clipY2, (yy + hh) );
 368     }
 369     else
 370     {
 371         m_clipping = true;
 372
 373         m_clipX1 = xx;
 374         m_clipY1 = yy;
 375         m_clipX2 = xx + ww;
 376         m_clipY2 = yy + hh;
 377     }
 378 }
 379
 380 void wxGCDC::DoSetClippingRegionAsRegion( const wxRegion &region )
 381 {
 382     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoSetClippingRegionAsRegion - invalid DC") );
 383
 384     if (region.Empty())
 385     {
 386         DestroyClippingRegion();
 387         return;
 388     }
 389
 390     wxCoord x, y, w, h;
 391     region.GetBox( x, y, w, h );
 392     wxCoord xx, yy, ww, hh;
 393     xx = LogicalToDeviceX(x);
 394     yy = LogicalToDeviceY(y);
 395     ww = LogicalToDeviceXRel(w);
 396     hh = LogicalToDeviceYRel(h);
 397
 398     // if we have a scaling that we cannot map onto native regions
 399     // we must use the box
 400     if ( ww != w || hh != h )
 401     {
 402         wxGCDC::DoSetClippingRegion( x, y, w, h );
 403     }
 404     else
 405     {
 406         m_graphicContext->Clip( region );
 407         if ( m_clipping )
 408         {
 409             m_clipX1 = wxMax( m_clipX1, xx );
 410             m_clipY1 = wxMax( m_clipY1, yy );
 411             m_clipX2 = wxMin( m_clipX2, (xx + ww) );
 412             m_clipY2 = wxMin( m_clipY2, (yy + hh) );
 413         }
 414         else
 415         {
 416             m_clipping = true;
 417
 418             m_clipX1 = xx;
 419             m_clipY1 = yy;
 420             m_clipX2 = xx + ww;
 421             m_clipY2 = yy + hh;
 422         }
 423     }
 424 }
 425
 426 void wxGCDC::DestroyClippingRegion()
 427 {
 428     m_graphicContext->ResetClip();
 429     m_graphicContext->SetPen( m_pen );
 430     m_graphicContext->SetBrush( m_brush );
 431
 432     m_clipping = false;
 433 }
 434
 435 void wxGCDC::DoGetSizeMM( int* width, int* height ) const
 436 {
 437     int w = 0, h = 0;
 438
 439     GetSize( &w, &h );
 440     if (width)
 441         *width = long( double(w) / (m_scaleX * m_mm_to_pix_x) );
 442     if (height)
 443         *height = long( double(h) / (m_scaleY * m_mm_to_pix_y) );
 444 }
 445
 446 void wxGCDC::SetTextForeground( const wxColour &col )
 447 {
 448     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::SetTextForeground - invalid DC") );
 449
 450     if ( col != m_textForegroundColour )
 451     {
 452         m_textForegroundColour = col;
 453         m_graphicContext->SetTextColor( col );
 454     }
 455 }
 456
 457 void wxGCDC::SetTextBackground( const wxColour &col )
 458 {
 459     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::SetTextBackground - invalid DC") );
 460
 461     m_textBackgroundColour = col;
 462 }
 463
 464 void wxGCDC::SetMapMode( int mode )
 465 {
 466     switch (mode)
 467     {
 468     case wxMM_TWIPS:
 469         SetLogicalScale( twips2mm * m_mm_to_pix_x, twips2mm * m_mm_to_pix_y );
 470         break;
 471
 472     case wxMM_POINTS:
 473         SetLogicalScale( pt2mm * m_mm_to_pix_x, pt2mm * m_mm_to_pix_y );
 474         break;
 475
 476     case wxMM_METRIC:
 477         SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
 478         break;
 479
 480     case wxMM_LOMETRIC:
 481         SetLogicalScale( m_mm_to_pix_x / 10.0, m_mm_to_pix_y / 10.0 );
 482         break;
 483
 484     case wxMM_TEXT:
 485     default:
 486         SetLogicalScale( 1.0, 1.0 );
 487         break;
 488     }
 489
 490     ComputeScaleAndOrigin();
 491 }
 492
 493 void wxGCDC::SetUserScale( double x, double y )
 494 {
 495     // allow negative ? -> no
 496
 497     m_userScaleX = x;
 498     m_userScaleY = y;
 499     ComputeScaleAndOrigin();
 500 }
 501
 502 void wxGCDC::SetLogicalScale( double x, double y )
 503 {
 504     // allow negative ?
 505     m_logicalScaleX = x;
 506     m_logicalScaleY = y;
 507     ComputeScaleAndOrigin();
 508 }
 509
 510 void wxGCDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 511 {
 512     m_logicalOriginX = x * m_signX;   // is this still correct ?
 513     m_logicalOriginY = y * m_signY;
 514     ComputeScaleAndOrigin();
 515 }
 516
 517 void wxGCDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 518 {
 519     m_deviceOriginX = x;
 520     m_deviceOriginY = y;
 521     ComputeScaleAndOrigin();
 522 }
 523
 524 void wxGCDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 525 {
 526     m_signX = (xLeftRight ?  1 : -1);
 527     m_signY = (yBottomUp ? -1 :  1);
 528     ComputeScaleAndOrigin();
 529 }
 530
 531 wxSize wxGCDC::GetPPI() const
 532 {
 533     return wxSize(72, 72);
 534 }
 535
 536 int wxGCDC::GetDepth() const
 537 {
 538     return 32;
 539 }
 540
 541 void wxGCDC::ComputeScaleAndOrigin()
 542 {
 543     // CMB: copy scale to see if it changes
 544     double origScaleX = m_scaleX;
 545     double origScaleY = m_scaleY;
 546     m_scaleX = m_logicalScaleX * m_userScaleX;
 547     m_scaleY = m_logicalScaleY * m_userScaleY;
 548     m_deviceOriginX = m_deviceOriginX + m_logicalOriginX;
 549     m_deviceOriginY = m_deviceOriginY + m_logicalOriginY;
 550
 551     // CMB: if scale has changed call SetPen to recalulate the line width
 552     if (m_scaleX != origScaleX || m_scaleY != origScaleY)
 553     {
 554         // this is a bit artificial, but we need to force wxDC to think
 555         // the pen has changed
 556         wxPen pen(GetPen());
 557         m_pen = wxNullPen;
 558         SetPen(pen);
 559         SetFont(m_font);
 560     }
 561 }
 562
 563 void wxGCDC::SetPalette( const wxPalette& WXUNUSED(palette) )
 564 {
 565
 566 }
 567
 568 void wxGCDC::SetBackgroundMode( int mode )
 569 {
 570     m_backgroundMode = mode;
 571 }
 572
 573 void wxGCDC::SetFont( const wxFont &font )
 574 {
 575     m_font = font;
 576     if ( m_graphicContext )
 577     {
 578         wxFont f = font;
 579         if ( f.Ok() )
 580             f.SetPointSize( LogicalToDeviceYRel(font.GetPointSize()));
 581         m_graphicContext->SetFont( f );
 582     }
 583 }
 584
 585 void wxGCDC::SetPen( const wxPen &pen )
 586 {
 587     if ( m_pen == pen )
 588         return;
 589
 590     m_pen = pen;
 591     if ( m_graphicContext )
 592     {
 593         if ( m_pen.GetStyle() == wxSOLID || m_pen.GetStyle() == wxTRANSPARENT )
 594         {
 595             m_graphicContext->SetPen( m_pen );
 596         }
 597         else
 598         {
 599             // we have to compensate for moved device origins etc. otherwise patterned pens are standing still
 600             // eg when using a wxScrollWindow and scrolling around
 601             int origX = LogicalToDeviceX( 0 );
 602             int origY = LogicalToDeviceY( 0 );
 603             m_graphicContext->Translate( origX , origY );
 604             m_graphicContext->SetPen( m_pen );
 605             m_graphicContext->Translate( -origX , -origY );
 606         }
 607     }
 608 }
 609
 610 void wxGCDC::SetBrush( const wxBrush &brush )
 611 {
 612     if (m_brush == brush)
 613         return;
 614
 615     m_brush = brush;
 616     if ( m_graphicContext )
 617     {
 618         if ( brush.GetStyle() == wxSOLID || brush.GetStyle() == wxTRANSPARENT )
 619         {
 620             m_graphicContext->SetBrush( m_brush );
 621         }
 622         else
 623         {
 624             // we have to compensate for moved device origins etc. otherwise patterned brushes are standing still
 625             // eg when using a wxScrollWindow and scrolling around
 626             // TODO on MSW / GDIPlus this still occurs with hatched brushes
 627             int origX = LogicalToDeviceX(0);
 628             int origY = LogicalToDeviceY(0);
 629             m_graphicContext->Translate( origX , origY );
 630             m_graphicContext->SetBrush( m_brush );
 631             m_graphicContext->Translate( -origX , -origY );
 632         }
 633     }
 634 }
 635
 636 void wxGCDC::SetBackground( const wxBrush &brush )
 637 {
 638     if (m_backgroundBrush == brush)
 639         return;
 640
 641     m_backgroundBrush = brush;
 642     if (!m_backgroundBrush.Ok())
 643         return;
 644 }
 645
 646 void wxGCDC::SetLogicalFunction( int function )
 647 {
 648     if (m_logicalFunction == function)
 649         return;
 650
 651     m_logicalFunction = function;
 652 #if wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
 653
 654     CGContextRef cgContext = ((wxCairoContext*)(m_graphicContext))->GetNativeContext();
 655     if ( m_logicalFunction == wxCOPY )
 656         CGContextSetBlendMode( cgContext, kCGBlendModeNormal );
 657     else if ( m_logicalFunction == wxINVERT )
 658         CGContextSetBlendMode( cgContext, kCGBlendModeExclusion );
 659     else
 660         CGContextSetBlendMode( cgContext, kCGBlendModeNormal );
 661 #endif
 662
 663 }
 664
 665 bool wxGCDC::DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 666                          const wxColour& WXUNUSED(col), int WXUNUSED(style))
 667 {
 668     return false;
 669 }
 670
 671 bool wxGCDC::DoGetPixel( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxColour *WXUNUSED(col) ) const
 672 {
 673     //  wxCHECK_MSG( 0 , false, wxT("wxGCDC(cg)::DoGetPixel - not implemented") );
 674     return false;
 675 }
 676
 677 void wxGCDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 678 {
 679     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawLine - invalid DC") );
 680
 681 #if !wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
 682
 683     if ( m_logicalFunction != wxCOPY )
 684         return;
 685 #endif
 686
 687     wxCoord xx1 = LogicalToDeviceX(x1);
 688     wxCoord yy1 = LogicalToDeviceY(y1);
 689     wxCoord xx2 = LogicalToDeviceX(x2);
 690     wxCoord yy2 = LogicalToDeviceY(y2);
 691
 692     m_graphicContext->StrokeLine(xx1,yy1,xx2,yy2);
 693
 694     CalcBoundingBox(x1, y1);
 695     CalcBoundingBox(x2, y2);
 696 }
 697
 698 void wxGCDC::DoCrossHair( wxCoord x, wxCoord y )
 699 {
 700     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoCrossHair - invalid DC") );
 701
 702     if ( m_logicalFunction != wxCOPY )
 703         return;
 704
 705     int w = 0, h = 0;
 706
 707     GetSize( &w, &h );
 708
 709     wxCoord xx = LogicalToDeviceX(x);
 710     wxCoord yy = LogicalToDeviceY(y);
 711     wxCoord xw = LogicalToDeviceX(w);
 712     wxCoord x0 = LogicalToDeviceX(0);
 713     wxCoord y0 = LogicalToDeviceY(0);
 714     wxCoord yh = LogicalToDeviceY(h);
 715
 716     m_graphicContext->StrokeLine(x0,yy,xw,yy);
 717     m_graphicContext->StrokeLine(xx,y0,xx,yh);
 718
 719     CalcBoundingBox(x0, y0);
 720     CalcBoundingBox(x0+xw, y0+yh);
 721 }
 722
 723 void wxGCDC::DoDrawArc( wxCoord x1, wxCoord y1,
 724                         wxCoord x2, wxCoord y2,
 725                         wxCoord xc, wxCoord yc )
 726 {
 727     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawArc - invalid DC") );
 728
 729     if ( m_logicalFunction != wxCOPY )
 730         return;
 731
 732     wxCoord xx1 = LogicalToDeviceX(x1);
 733     wxCoord yy1 = LogicalToDeviceY(y1);
 734     wxCoord xx2 = LogicalToDeviceX(x2);
 735     wxCoord yy2 = LogicalToDeviceY(y2);
 736     wxCoord xxc = LogicalToDeviceX(xc);
 737     wxCoord yyc = LogicalToDeviceY(yc);
 738
 739     double dx = xx1 - xxc;
 740     double dy = yy1 - yyc;
 741     double radius = sqrt((double)(dx * dx + dy * dy));
 742     wxCoord rad = (wxCoord)radius;
 743     double sa, ea;
 744     if (xx1 == xx2 && yy1 == yy2)
 745     {
 746         sa = 0.0;
 747         ea = 360.0;
 748     }
 749     else if (radius == 0.0)
 750     {
 751         sa = ea = 0.0;
 752     }
 753     else
 754     {
 755         sa = (xx1 - xxc == 0) ?
 756      (yy1 - yyc < 0) ? 90.0 : -90.0 :
 757              -atan2(double(yy1 - yyc), double(xx1 - xxc)) * RAD2DEG;
 758         ea = (xx2 - xxc == 0) ?
 759      (yy2 - yyc < 0) ? 90.0 : -90.0 :
 760              -atan2(double(yy2 - yyc), double(xx2 - xxc)) * RAD2DEG;
 761     }
 762
 763     bool fill = m_brush.GetStyle() != wxTRANSPARENT;
 764
 765     wxGraphicsPath* path = m_graphicContext->CreatePath();
 766     if ( fill && ((x1!=x2)||(y1!=y2)) )
 767         path->MoveToPoint( xxc, yyc );
 768     path->AddArc( xxc, yyc , rad , DegToRad(sa) , DegToRad(ea), false );
 769     if ( fill && ((x1!=x2)||(y1!=y2)) )
 770         path->AddLineToPoint( xxc, yyc );
 771     m_graphicContext->DrawPath(path);
 772     delete path;
 773 }
 774
 775 void wxGCDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 776                                 double sa, double ea )
 777 {
 778     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawEllipticArc - invalid DC") );
 779
 780     if ( m_logicalFunction != wxCOPY )
 781         return;
 782
 783     wxCoord xx = LogicalToDeviceX(x);
 784     wxCoord yy = LogicalToDeviceY(y);
 785     wxCoord ww = m_signX * LogicalToDeviceXRel(w);
 786     wxCoord hh = m_signY * LogicalToDeviceYRel(h);
 787
 788     // handle -ve width and/or height
 789     if (ww < 0)
 790     {
 791         ww = -ww;
 792         xx = xx - ww;
 793     }
 794     if (hh < 0)
 795     {
 796         hh = -hh;
 797         yy = yy - hh;
 798     }
 799
 800     bool fill = m_brush.GetStyle() != wxTRANSPARENT;
 801
 802     wxGraphicsPath* path = m_graphicContext->CreatePath();
 803     m_graphicContext->PushState();
 804     m_graphicContext->Translate(xx+ww/2,yy+hh/2);
 805     wxDouble factor = ((wxDouble) ww) / hh;
 806     m_graphicContext->Scale( factor , 1.0);
 807     if ( fill && (sa!=ea) )
 808         path->MoveToPoint(0,0);
 809     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 810     // get clockwise angles
 811     path->AddArc( 0, 0, hh/2 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 812     if ( fill && (sa!=ea) )
 813         path->AddLineToPoint(0,0);
 814     m_graphicContext->DrawPath( path );
 815     m_graphicContext->PopState();
 816     delete path;
 817 }
 818
 819 void wxGCDC::DoDrawPoint( wxCoord x, wxCoord y )
 820 {
 821     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawPoint - invalid DC") );
 822
 823     DoDrawLine( x , y , x + 1 , y + 1 );
 824 }
 825
 826 void wxGCDC::DoDrawLines(int n, wxPoint points[],
 827                          wxCoord xoffset, wxCoord yoffset)
 828 {
 829     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawLines - invalid DC") );
 830
 831 #if !wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
 832
 833     if ( m_logicalFunction != wxCOPY )
 834         return;
 835 #endif
 836
 837     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n];
 838     for( int i = 0; i < n; ++i)
 839     {
 840         pointsD[i].m_x = LogicalToDeviceX(points[i].x + xoffset);
 841         pointsD[i].m_y = LogicalToDeviceY(points[i].y + yoffset);
 842     }
 843
 844     m_graphicContext->StrokeLines( n , pointsD);
 845     delete[] pointsD;
 846 }
 847
 848 #if wxUSE_SPLINES
 849 void wxGCDC::DoDrawSpline(wxList *points)
 850 {
 851     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawSpline - invalid DC") );
 852
 853     if ( m_logicalFunction != wxCOPY )
 854         return;
 855
 856     wxGraphicsPath* path = m_graphicContext->CreatePath();
 857
 858     wxList::compatibility_iterator node = points->GetFirst();
 859     if (node == wxList::compatibility_iterator())
 860         // empty list
 861         return;
 862
 863     wxPoint *p = (wxPoint *)node->GetData();
 864
 865     wxCoord x1 = p->x;
 866     wxCoord y1 = p->y;
 867
 868     node = node->GetNext();
 869     p = (wxPoint *)node->GetData();
 870
 871     wxCoord x2 = p->x;
 872     wxCoord y2 = p->y;
 873     wxCoord cx1 = ( x1 + x2 ) / 2;
 874     wxCoord cy1 = ( y1 + y2 ) / 2;
 875
 876     path->MoveToPoint( LogicalToDeviceX( x1 ) , LogicalToDeviceY( y1 ) );
 877     path->AddLineToPoint( LogicalToDeviceX( cx1 ) , LogicalToDeviceY( cy1 ) );
 878 #if !wxUSE_STL
 879
 880     while ((node = node->GetNext()) != NULL)
 881 #else
 882
 883     while ((node = node->GetNext()))
 884 #endif // !wxUSE_STL
 885
 886     {
 887         p = (wxPoint *)node->GetData();
 888         x1 = x2;
 889         y1 = y2;
 890         x2 = p->x;
 891         y2 = p->y;
 892         wxCoord cx4 = (x1 + x2) / 2;
 893         wxCoord cy4 = (y1 + y2) / 2;
 894
 895         path->AddQuadCurveToPoint(
 896             LogicalToDeviceX( x1 ) , LogicalToDeviceY( y1 ) ,
 897             LogicalToDeviceX( cx4 ) , LogicalToDeviceY( cy4 ) );
 898
 899         cx1 = cx4;
 900         cy1 = cy4;
 901     }
 902
 903     path->AddLineToPoint( LogicalToDeviceX( x2 ) , LogicalToDeviceY( y2 ) );
 904
 905     m_graphicContext->StrokePath( path );
 906     delete path;
 907 }
 908 #endif // wxUSE_SPLINES
 909
 910 void wxGCDC::DoDrawPolygon( int n, wxPoint points[],
 911                             wxCoord xoffset, wxCoord yoffset,
 912                             int fillStyle )
 913 {
 914     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawPolygon - invalid DC") );
 915
 916     if ( n <= 0 || (m_brush.GetStyle() == wxTRANSPARENT && m_pen.GetStyle() == wxTRANSPARENT ) )
 917         return;
 918     if ( m_logicalFunction != wxCOPY )
 919         return;
 920
 921     bool closeIt = false;
 922     if (points[n-1] != points[0])
 923         closeIt = true;
 924
 925     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n+(closeIt?1:0)];
 926     for( int i = 0; i < n; ++i)
 927     {
 928         pointsD[i].m_x = LogicalToDeviceX(points[i].x + xoffset);
 929         pointsD[i].m_y = LogicalToDeviceY(points[i].y + yoffset);
 930     }
 931     if ( closeIt )
 932         pointsD[n] = pointsD[0];
 933
 934     m_graphicContext->DrawLines( n+(closeIt?1:0) , pointsD, fillStyle);
 935     delete[] pointsD;
 936 }
 937
 938 void wxGCDC::DoDrawPolyPolygon(int n,
 939                                int count[],
 940                                wxPoint points[],
 941                                wxCoord xoffset,
 942                                wxCoord yoffset,
 943                                int fillStyle)
 944 {
 945     wxASSERT(n > 1);
 946     wxGraphicsPath* path = m_graphicContext->CreatePath();
 947
 948     int i = 0;
 949     for ( int j = 0; j < n; ++j)
 950     {
 951         wxPoint start = points[i];
 952         path->MoveToPoint(LogicalToDeviceX(start.x+ xoffset), LogicalToDeviceY(start.y+ yoffset));
 953         ++i;
 954         int l = count[j];
 955         for ( int k = 1; k < l; ++k)
 956         {
 957             path->AddLineToPoint( LogicalToDeviceX(points[i].x+ xoffset), LogicalToDeviceY(points[i].y+ yoffset));
 958             ++i;
 959         }
 960         // close the polygon
 961         if ( start != points[i-1])
 962             path->AddLineToPoint( LogicalToDeviceX(start.x+ xoffset), LogicalToDeviceY(start.y+ yoffset));
 963     }
 964     m_graphicContext->DrawPath( path , fillStyle);
 965     delete path;
 966 }
 967
 968 void wxGCDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 969 {
 970     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRectangle - invalid DC") );
 971
 972     if ( m_logicalFunction != wxCOPY )
 973         return;
 974
 975     wxCoord xx = LogicalToDeviceX(x);
 976     wxCoord yy = LogicalToDeviceY(y);
 977     wxCoord ww = m_signX * LogicalToDeviceXRel(width);
 978     wxCoord hh = m_signY * LogicalToDeviceYRel(height);
 979
 980     // CMB: draw nothing if transformed w or h is 0
 981     if (ww == 0 || hh == 0)
 982         return;
 983
 984     // CMB: handle -ve width and/or height
 985     if (ww < 0)
 986     {
 987         ww = -ww;
 988         xx = xx - ww;
 989     }
 990     if (hh < 0)
 991     {
 992         hh = -hh;
 993         yy = yy - hh;
 994     }
 995     if ( m_graphicContext->ShouldOffset() )
 996     {
 997         // if we are offsetting the entire rectangle is moved 0.5, so the
 998         // border line gets off by 1
 999         ww -= 1;
1000         hh -= 1;
1001     }
1002     m_graphicContext->DrawRectangle( xx,yy,ww,hh);
1003 }
1004
1005 void wxGCDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y,
1006                                     wxCoord width, wxCoord height,
1007                                     double radius)
1008 {
1009     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRoundedRectangle - invalid DC") );
1010
1011     if ( m_logicalFunction != wxCOPY )
1012         return;
1013
1014     if (radius < 0.0)
1015         radius = - radius * ((width < height) ? width : height);
1016     wxCoord xx = LogicalToDeviceX(x);
1017     wxCoord yy = LogicalToDeviceY(y);
1018     wxCoord ww = m_signX * LogicalToDeviceXRel(width);
1019     wxCoord hh = m_signY * LogicalToDeviceYRel(height);
1020
1021     // CMB: draw nothing if transformed w or h is 0
1022     if (ww == 0 || hh == 0)
1023         return;
1024
1025     // CMB: handle -ve width and/or height
1026     if (ww < 0)
1027     {
1028         ww = -ww;
1029         xx = xx - ww;
1030     }
1031     if (hh < 0)
1032     {
1033         hh = -hh;
1034         yy = yy - hh;
1035     }
1036
1037     m_graphicContext->DrawRoundedRectangle( xx,yy,ww,hh,radius);
1038 }
1039
1040 void wxGCDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
1041 {
1042     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawEllipse - invalid DC") );
1043
1044     if ( m_logicalFunction != wxCOPY )
1045         return;
1046
1047     wxDouble xx = LogicalToDeviceX(x);
1048     wxDouble yy = LogicalToDeviceY(y);
1049     wxDouble ww = m_signX * LogicalToDeviceXRel(width);
1050     wxDouble hh = m_signY * LogicalToDeviceYRel(height);
1051
1052     // CMB: draw nothing if transformed w or h is 0
1053     if (ww == 0 || hh == 0)
1054         return;
1055
1056     // CMB: handle -ve width and/or height
1057     if (ww < 0)
1058     {
1059         ww = -ww;
1060         xx = xx - ww;
1061     }
1062     if (hh < 0)
1063     {
1064         hh = -hh;
1065         yy = yy - hh;
1066     }
1067
1068     m_graphicContext->DrawEllipse(xx,yy,ww,hh);
1069 }
1070
1071 bool wxGCDC::CanDrawBitmap() const
1072 {
1073     return true;
1074 }
1075
1076 bool wxGCDC::DoBlit(
1077     wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
1078     wxDC *source, wxCoord xsrc, wxCoord ysrc, int logical_func , bool WXUNUSED(useMask),
1079     wxCoord xsrcMask, wxCoord ysrcMask )
1080 {
1081     wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::DoBlit - invalid DC") );
1082     wxCHECK_MSG( source->Ok(), false, wxT("wxGCDC(cg)::DoBlit - invalid source DC") );
1083
1084     if ( logical_func == wxNO_OP )
1085         return true;
1086
1087     if (xsrcMask == -1 && ysrcMask == -1)
1088     {
1089         xsrcMask = xsrc;
1090         ysrcMask = ysrc;
1091     }
1092
1093     wxCoord yysrc = source-> LogicalToDeviceY(ysrc);
1094     wxCoord xxsrc = source-> LogicalToDeviceX(xsrc);
1095     wxCoord wwsrc = source-> LogicalToDeviceXRel(width);
1096     wxCoord hhsrc = source-> LogicalToDeviceYRel(height);
1097
1098     wxCoord yydest = LogicalToDeviceY(ydest);
1099     wxCoord xxdest = LogicalToDeviceX(xdest);
1100     wxCoord wwdest = LogicalToDeviceXRel(width);
1101     wxCoord hhdest = LogicalToDeviceYRel(height);
1102
1103     wxMemoryDC* memdc = wxDynamicCast(source,wxMemoryDC);
1104     if ( memdc && logical_func == wxCOPY )
1105     {
1106         wxBitmap blit = memdc->GetSelectedBitmap();
1107
1108         wxASSERT_MSG( blit.Ok() , wxT("Invalid bitmap for blitting") );
1109
1110         wxCoord bmpwidth = blit.GetWidth();
1111         wxCoord bmpheight = blit.GetHeight();
1112
1113         if ( xxsrc != 0 || yysrc != 0 || bmpwidth != wwsrc || bmpheight != hhsrc )
1114         {
1115             wwsrc = wxMin( wwsrc , bmpwidth - xxsrc );
1116             hhsrc = wxMin( hhsrc , bmpheight - yysrc );
1117             if ( wwsrc > 0 && hhsrc > 0 )
1118             {
1119                 if ( xxsrc >= 0 && yysrc >= 0 )
1120                 {
1121                     wxRect subrect( xxsrc, yysrc, wwsrc , hhsrc );
1122                     // TODO we perhaps could add a DrawSubBitmap call to dc for performance reasons
1123                     blit = blit.GetSubBitmap( subrect );
1124                 }
1125                 else
1126                 {
1127                     // in this case we'd probably have to adjust the different coordinates, but
1128                     // we have to find out proper contract first
1129                     blit = wxNullBitmap;
1130                 }
1131             }
1132             else
1133             {
1134                 blit = wxNullBitmap;
1135             }
1136         }
1137
1138         if ( blit.Ok() )
1139         {
1140             m_graphicContext->DrawBitmap( blit, xxdest , yydest , wwdest , hhdest );
1141         }
1142     }
1143     else
1144     {
1145         wxFAIL_MSG( wxT("Blitting is only supported from bitmap contexts, and only with wxCOPY logical operation.") );
1146         return false;
1147     }
1148
1149     return true;
1150 }
1151
1152 void wxGCDC::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
1153                                double angle)
1154 {
1155     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
1156
1157     if ( str.length() == 0 )
1158         return;
1159     if ( m_logicalFunction != wxCOPY )
1160         return;
1161
1162     int drawX = LogicalToDeviceX(x);
1163     int drawY = LogicalToDeviceY(y);
1164
1165     m_graphicContext->DrawText( str, drawX ,drawY , DegToRad(angle ));
1166 }
1167
1168 void wxGCDC::DoDrawText(const wxString& str, wxCoord x, wxCoord y)
1169 {
1170     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
1171
1172     if ( str.length() == 0 )
1173         return;
1174     if ( m_logicalFunction != wxCOPY )
1175         return;
1176
1177     int drawX = LogicalToDeviceX(x);
1178     int drawY = LogicalToDeviceY(y);
1179
1180     m_graphicContext->DrawText( str, drawX ,drawY);
1181 }
1182
1183 bool wxGCDC::CanGetTextExtent() const
1184 {
1185     wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::CanGetTextExtent - invalid DC") );
1186
1187     return true;
1188 }
1189
1190 void wxGCDC::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
1191                               wxCoord *descent, wxCoord *externalLeading ,
1192                               wxFont *theFont ) const
1193 {
1194     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );
1195
1196     if ( theFont )
1197     {
1198         m_graphicContext->SetFont( *theFont );
1199     }
1200
1201     wxDouble h , d , e , w;
1202
1203     m_graphicContext->GetTextExtent( str, &w, &h, &d, &e );
1204
1205     if ( height )
1206         *height = DeviceToLogicalYRel((wxCoord)h);
1207     if ( descent )
1208         *descent = DeviceToLogicalYRel((wxCoord)d);
1209     if ( externalLeading )
1210         *externalLeading = DeviceToLogicalYRel((wxCoord)e);
1211     if ( width )
1212         *width = DeviceToLogicalXRel((wxCoord)w);
1213
1214     if ( theFont )
1215     {
1216         m_graphicContext->SetFont( m_font );
1217     }
1218 }
1219
1220 bool wxGCDC::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
1221 {
1222     wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::DoGetPartialTextExtents - invalid DC") );
1223     widths.Clear();
1224     widths.Add(0,text.Length());
1225     if ( text.IsEmpty() )
1226         return true;
1227
1228     wxArrayDouble widthsD;
1229
1230     m_graphicContext->GetPartialTextExtents( text, widthsD );
1231     for ( size_t i = 0; i < widths.GetCount(); ++i )
1232         widths[i] = DeviceToLogicalXRel((wxCoord)(widthsD[i] + 0.5));
1233
1234     return true;
1235 }
1236
1237 wxCoord wxGCDC::GetCharWidth(void) const
1238 {
1239     wxCoord width;
1240     DoGetTextExtent( wxT("g") , &width , NULL , NULL , NULL , NULL );
1241
1242     return width;
1243 }
1244
1245 wxCoord wxGCDC::GetCharHeight(void) const
1246 {
1247     wxCoord height;
1248     DoGetTextExtent( wxT("g") , NULL , &height , NULL , NULL , NULL );
1249
1250     return height;
1251 }
1252
1253 void wxGCDC::Clear(void)
1254 {
1255     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::Clear - invalid DC") );
1256     // TODO better implementation / incorporate size info into wxGCDC or context
1257     m_graphicContext->SetBrush( m_backgroundBrush );
1258     wxPen p = *wxTRANSPARENT_PEN;
1259     m_graphicContext->SetPen( p );
1260     DoDrawRectangle( 0, 0, 32000 , 32000 );
1261     m_graphicContext->SetPen( m_pen );
1262     m_graphicContext->SetBrush( m_brush );
1263 }
1264
1265 void wxGCDC::DoGetSize(int *width, int *height) const
1266 {
1267     *width = 1000;
1268     *height = 1000;
1269 }
1270
1271 void wxGCDC::DoGradientFillLinear(const wxRect& rect,
1272                                   const wxColour& initialColour,
1273                                   const wxColour& destColour,
1274                                   wxDirection nDirection )
1275 {
1276     wxPoint start;
1277     wxPoint end;
1278     switch( nDirection)
1279     {
1280     case wxWEST :
1281         start = rect.GetRightBottom();
1282         start.x++;
1283         end = rect.GetLeftBottom();
1284         break;
1285     case wxEAST :
1286         start = rect.GetLeftBottom();
1287         end = rect.GetRightBottom();
1288         end.x++;
1289         break;
1290     case wxNORTH :
1291         start = rect.GetLeftBottom();
1292         start.y++;
1293         end = rect.GetLeftTop();
1294         break;
1295     case wxSOUTH :
1296         start = rect.GetLeftTop();
1297         end = rect.GetLeftBottom();
1298         end.y++;
1299         break;
1300     default :
1301         break;
1302     }
1303
1304     m_graphicContext->SetLinearGradientBrush(
1305         LogicalToDeviceX(start.x),LogicalToDeviceY(start.y),
1306         LogicalToDeviceX(end.x),LogicalToDeviceY(end.y), initialColour, destColour);
1307
1308     wxDouble xx = LogicalToDeviceX(rect.x);
1309     wxDouble yy = LogicalToDeviceY(rect.y);
1310     wxDouble ww = m_signX * LogicalToDeviceXRel(rect.width);
1311     wxDouble hh = m_signY * LogicalToDeviceYRel(rect.height);
1312
1313     if (ww == 0 || hh == 0)
1314         return;
1315
1316     if (ww < 0)
1317     {
1318         ww = -ww;
1319         xx = xx - ww;
1320     }
1321     if (hh < 0)
1322     {
1323         hh = -hh;
1324         yy = yy - hh;
1325     }
1326
1327     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1328     m_graphicContext->DrawRectangle(xx,yy,ww,hh);
1329     m_graphicContext->SetPen(m_pen);
1330 }
1331
1332 void wxGCDC::DoGradientFillConcentric(const wxRect& rect,
1333                                       const wxColour& initialColour,
1334                                       const wxColour& destColour,
1335                                       const wxPoint& circleCenter)
1336 {
1337     //Radius
1338     wxInt32 cx = rect.GetWidth() / 2;
1339     wxInt32 cy = rect.GetHeight() / 2;
1340     wxInt32 nRadius;
1341     if (cx < cy)
1342         nRadius = cx;
1343     else
1344         nRadius = cy;
1345
1346     wxDouble xx = LogicalToDeviceX(rect.x);
1347     wxDouble yy = LogicalToDeviceY(rect.y);
1348     wxDouble ww = m_signX * LogicalToDeviceXRel(rect.width);
1349     wxDouble hh = m_signY * LogicalToDeviceYRel(rect.height);
1350
1351     if (ww == 0 || hh == 0)
1352         return;
1353
1354     if (ww < 0)
1355     {
1356         ww = -ww;
1357         xx = xx - ww;
1358     }
1359     if (hh < 0)
1360     {
1361         hh = -hh;
1362         yy = yy - hh;
1363     }
1364
1365     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1366     m_graphicContext->SetBrush( wxBrush( destColour) );
1367     m_graphicContext->DrawRectangle( xx,yy,ww,hh);
1368
1369     m_graphicContext->SetRadialGradientBrush(
1370         xx+LogicalToDeviceX(circleCenter.x),yy+LogicalToDeviceY(circleCenter.y),
1371         xx+LogicalToDeviceX(circleCenter.x),yy+LogicalToDeviceY(circleCenter.y),
1372         LogicalToDeviceXRel(nRadius),
1373         initialColour,destColour);
1374
1375     m_graphicContext->DrawRectangle( xx,yy,ww,hh);
1376     m_graphicContext->SetPen(m_pen);
1377 }
1378
1379 void wxGCDC::DoDrawCheckMark(wxCoord x, wxCoord y,
1380                              wxCoord width, wxCoord height)
1381 {
1382     wxDCBase::DoDrawCheckMark(x,y,width,height);
1383 }
1384
1385 #endif // wxUSE_GRAPHICS_CONTEXT