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