src/msw/graphics.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/graphics.cpp
   3 // Purpose:     wxGCDC class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     2006-09-30
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2006 Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #include "wx/dc.h"
  19
  20 #if wxUSE_GRAPHICS_CONTEXT
  21
  22 #ifndef WX_PRECOMP
  23     #include "wx/msw/wrapcdlg.h"
  24     #include "wx/image.h"
  25     #include "wx/window.h"
  26     #include "wx/utils.h"
  27     #include "wx/dialog.h"
  28     #include "wx/app.h"
  29     #include "wx/bitmap.h"
  30     #include "wx/log.h"
  31     #include "wx/icon.h"
  32     #include "wx/module.h"
  33     // include all dc types that are used as a param
  34     #include "wx/dc.h"
  35     #include "wx/dcclient.h"
  36     #include "wx/dcmemory.h"
  37     #include "wx/dcprint.h"
  38 #endif
  39
  40 #include "wx/private/graphics.h"
  41 #include "wx/msw/wrapgdip.h"
  42 #include "wx/msw/dc.h"
  43 #include "wx/msw/enhmeta.h"
  44 #include "wx/dcgraph.h"
  45
  46 #include "wx/msw/private.h" // needs to be before #include <commdlg.h>
  47
  48 #if wxUSE_COMMON_DIALOGS && !defined(__WXMICROWIN__)
  49 #include <commdlg.h>
  50 #endif
  51
  52 #include "wx/stack.h"
  53
  54 WX_DECLARE_STACK(GraphicsState, GraphicsStates);
  55
  56 namespace
  57 {
  58
  59 //-----------------------------------------------------------------------------
  60 // constants
  61 //-----------------------------------------------------------------------------
  62
  63 const double RAD2DEG = 180.0 / M_PI;
  64
  65 //-----------------------------------------------------------------------------
  66 // Local functions
  67 //-----------------------------------------------------------------------------
  68
  69 inline double dmin(double a, double b) { return a < b ? a : b; }
  70 inline double dmax(double a, double b) { return a > b ? a : b; }
  71
  72 inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
  73 inline double RadToDeg(double deg) { return (deg * 180.0) / M_PI; }
  74
  75 // translate a wxColour to a Color
  76 inline Color wxColourToColor(const wxColour& col)
  77 {
  78     return Color(col.Alpha(), col.Red(), col.Green(), col.Blue());
  79 }
  80
  81 } // anonymous namespace
  82
  83 //-----------------------------------------------------------------------------
  84 // device context implementation
  85 //
  86 // more and more of the dc functionality should be implemented by calling
  87 // the appropricate wxGDIPlusContext, but we will have to do that step by step
  88 // also coordinate conversions should be moved to native matrix ops
  89 //-----------------------------------------------------------------------------
  90
  91 // we always stock two context states, one at entry, to be able to preserve the
  92 // state we were called with, the other one after changing to HI Graphics orientation
  93 // (this one is used for getting back clippings etc)
  94
  95 //-----------------------------------------------------------------------------
  96 // wxGraphicsPath implementation
  97 //-----------------------------------------------------------------------------
  98
  99 class wxGDIPlusPathData : public wxGraphicsPathData
 100 {
 101 public :
 102     wxGDIPlusPathData(wxGraphicsRenderer* renderer, GraphicsPath* path = NULL);
 103     ~wxGDIPlusPathData();
 104
 105     virtual wxGraphicsObjectRefData *Clone() const;
 106
 107     //
 108     // These are the path primitives from which everything else can be constructed
 109     //
 110
 111     // begins a new subpath at (x,y)
 112     virtual void MoveToPoint( wxDouble x, wxDouble y );
 113
 114     // adds a straight line from the current point to (x,y)
 115     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 116
 117     // adds a cubic Bezier curve from the current point, using two control points and an end point
 118     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 119
 120
 121     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 122     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 123
 124     // gets the last point of the current path, (0,0) if not yet set
 125     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 126
 127     // adds another path
 128     virtual void AddPath( const wxGraphicsPathData* path );
 129
 130     // closes the current sub-path
 131     virtual void CloseSubpath();
 132
 133     //
 134     // These are convenience functions which - if not available natively will be assembled
 135     // using the primitives from above
 136     //
 137
 138     // appends a rectangle as a new closed subpath
 139     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 140     /*
 141
 142     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 143     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 144
 145     // 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)
 146     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 147 */
 148
 149     // returns the native path
 150     virtual void * GetNativePath() const { return m_path; }
 151
 152     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 153     virtual void UnGetNativePath(void * WXUNUSED(path)) const {}
 154
 155     // transforms each point of this path by the matrix
 156     virtual void Transform( const wxGraphicsMatrixData* matrix ) ;
 157
 158     // gets the bounding box enclosing all points (possibly including control points)
 159     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
 160
 161     virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxODDEVEN_RULE) const;
 162
 163 private :
 164     GraphicsPath* m_path;
 165 };
 166
 167 class wxGDIPlusMatrixData : public wxGraphicsMatrixData
 168 {
 169 public :
 170     wxGDIPlusMatrixData(wxGraphicsRenderer* renderer, Matrix* matrix = NULL) ;
 171     virtual ~wxGDIPlusMatrixData() ;
 172
 173     virtual wxGraphicsObjectRefData* Clone() const ;
 174
 175     // concatenates the matrix
 176     virtual void Concat( const wxGraphicsMatrixData *t );
 177
 178     // sets the matrix to the respective values
 179     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 180         wxDouble tx=0.0, wxDouble ty=0.0);
 181
 182     // gets the component valuess of the matrix
 183     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
 184                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
 185
 186     // makes this the inverse matrix
 187     virtual void Invert();
 188
 189     // returns true if the elements of the transformation matrix are equal ?
 190     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
 191
 192     // return true if this is the identity matrix
 193     virtual bool IsIdentity() const;
 194
 195     //
 196     // transformation
 197     //
 198
 199     // add the translation to this matrix
 200     virtual void Translate( wxDouble dx , wxDouble dy );
 201
 202     // add the scale to this matrix
 203     virtual void Scale( wxDouble xScale , wxDouble yScale );
 204
 205     // add the rotation to this matrix (radians)
 206     virtual void Rotate( wxDouble angle );
 207
 208     //
 209     // apply the transforms
 210     //
 211
 212     // applies that matrix to the point
 213     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 214
 215     // applies the matrix except for translations
 216     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 217
 218     // returns the native representation
 219     virtual void * GetNativeMatrix() const;
 220 private:
 221     Matrix* m_matrix ;
 222 } ;
 223
 224 class wxGDIPlusPenData : public wxGraphicsObjectRefData
 225 {
 226 public:
 227     wxGDIPlusPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 228     ~wxGDIPlusPenData();
 229
 230     void Init();
 231
 232     virtual wxDouble GetWidth() { return m_width; }
 233     virtual Pen* GetGDIPlusPen() { return m_pen; }
 234
 235 protected :
 236     Pen* m_pen;
 237     Image* m_penImage;
 238     Brush* m_penBrush;
 239
 240     wxDouble m_width;
 241 };
 242
 243 class wxGDIPlusBrushData : public wxGraphicsObjectRefData
 244 {
 245 public:
 246     wxGDIPlusBrushData( wxGraphicsRenderer* renderer );
 247     wxGDIPlusBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 248     ~wxGDIPlusBrushData ();
 249
 250     void CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 251                                    wxDouble x2, wxDouble y2,
 252                                    const wxGraphicsGradientStops& stops);
 253     void CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 254                                    wxDouble xc, wxDouble yc,
 255                                    wxDouble radius,
 256                                    const wxGraphicsGradientStops& stops);
 257
 258     virtual Brush* GetGDIPlusBrush() { return m_brush; }
 259
 260 protected:
 261     virtual void Init();
 262
 263 private:
 264     // common part of Create{Linear,Radial}GradientBrush()
 265     template <typename T>
 266     void SetGradientStops(T *brush, const wxGraphicsGradientStops& stops);
 267
 268     Brush* m_brush;
 269     Image* m_brushImage;
 270     GraphicsPath* m_brushPath;
 271 };
 272
 273 class WXDLLIMPEXP_CORE wxGDIPlusBitmapData : public wxGraphicsObjectRefData
 274 {
 275 public:
 276     wxGDIPlusBitmapData( wxGraphicsRenderer* renderer, Bitmap* bitmap );
 277     wxGDIPlusBitmapData( wxGraphicsRenderer* renderer, const wxBitmap &bmp );
 278     ~wxGDIPlusBitmapData ();
 279
 280     virtual Bitmap* GetGDIPlusBitmap() { return m_bitmap; }
 281
 282 private :
 283     Bitmap* m_bitmap;
 284     Bitmap* m_helper;
 285 };
 286
 287 class wxGDIPlusFontData : public wxGraphicsObjectRefData
 288 {
 289 public:
 290     wxGDIPlusFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col );
 291     ~wxGDIPlusFontData();
 292
 293     virtual Brush* GetGDIPlusBrush() { return m_textBrush; }
 294     virtual Font* GetGDIPlusFont() { return m_font; }
 295 private :
 296     Brush* m_textBrush;
 297     Font* m_font;
 298 };
 299
 300 class wxGDIPlusContext : public wxGraphicsContext
 301 {
 302 public:
 303     wxGDIPlusContext( wxGraphicsRenderer* renderer, HDC hdc , wxDouble width, wxDouble height );
 304     wxGDIPlusContext( wxGraphicsRenderer* renderer, HWND hwnd );
 305     wxGDIPlusContext( wxGraphicsRenderer* renderer, Graphics* gr);
 306     wxGDIPlusContext();
 307
 308     virtual ~wxGDIPlusContext();
 309
 310     virtual void Clip( const wxRegion &region );
 311     // clips drawings to the rect
 312     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 313
 314     // resets the clipping to original extent
 315     virtual void ResetClip();
 316
 317     virtual void * GetNativeContext();
 318
 319     virtual void StrokePath( const wxGraphicsPath& p );
 320     virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxODDEVEN_RULE );
 321
 322     // stroke lines connecting each of the points
 323     virtual void StrokeLines( size_t n, const wxPoint2DDouble *points);
 324
 325     // draws a polygon
 326     virtual void DrawLines( size_t n, const wxPoint2DDouble *points, wxPolygonFillMode fillStyle = wxODDEVEN_RULE );
 327
 328     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
 329
 330     virtual bool SetCompositionMode(wxCompositionMode op);
 331
 332     virtual void BeginLayer(wxDouble opacity);
 333
 334     virtual void EndLayer();
 335
 336     virtual void Translate( wxDouble dx , wxDouble dy );
 337     virtual void Scale( wxDouble xScale , wxDouble yScale );
 338     virtual void Rotate( wxDouble angle );
 339
 340     // concatenates this transform with the current transform of this context
 341     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 342
 343     // sets the transform of this context
 344     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 345
 346     // gets the matrix of this context
 347     virtual wxGraphicsMatrix GetTransform() const;
 348
 349     virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 350     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 351     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 352     virtual void PushState();
 353     virtual void PopState();
 354
 355     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 356         wxDouble *descent, wxDouble *externalLeading ) const;
 357     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 358     virtual bool ShouldOffset() const;
 359     virtual void GetSize( wxDouble* width, wxDouble *height );
 360
 361 private:
 362     void    Init();
 363     void    SetDefaults();
 364
 365     virtual void DoDrawText(const wxString& str, wxDouble x, wxDouble y)
 366         { DoDrawFilledText(str, x, y, wxNullGraphicsBrush); }
 367     virtual void DoDrawFilledText(const wxString& str, wxDouble x, wxDouble y,
 368                                   const wxGraphicsBrush& backgroundBrush);
 369
 370     Graphics* m_context;
 371     GraphicsStates m_stateStack;
 372     GraphicsState m_state1;
 373     GraphicsState m_state2;
 374
 375     wxDouble m_width;
 376     wxDouble m_height;
 377
 378     DECLARE_DYNAMIC_CLASS_NO_COPY(wxGDIPlusContext)
 379 };
 380
 381 class wxGDIPlusMeasuringContext : public wxGDIPlusContext
 382 {
 383 public:
 384     wxGDIPlusMeasuringContext( wxGraphicsRenderer* renderer ) : wxGDIPlusContext( renderer , m_hdc = GetDC(NULL), 1000, 1000 )
 385     {
 386     }
 387     wxGDIPlusMeasuringContext()
 388     {
 389     }
 390
 391     virtual ~wxGDIPlusMeasuringContext()
 392     {
 393         ReleaseDC( NULL, m_hdc );
 394     }
 395
 396 private:
 397     HDC m_hdc ;
 398     DECLARE_DYNAMIC_CLASS_NO_COPY(wxGDIPlusMeasuringContext)
 399 } ;
 400
 401 //-----------------------------------------------------------------------------
 402 // wxGDIPlusPen implementation
 403 //-----------------------------------------------------------------------------
 404
 405 wxGDIPlusPenData::~wxGDIPlusPenData()
 406 {
 407     delete m_pen;
 408     delete m_penImage;
 409     delete m_penBrush;
 410 }
 411
 412 void wxGDIPlusPenData::Init()
 413 {
 414     m_pen = NULL ;
 415     m_penImage = NULL;
 416     m_penBrush = NULL;
 417 }
 418
 419 wxGDIPlusPenData::wxGDIPlusPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 420 : wxGraphicsObjectRefData(renderer)
 421 {
 422     Init();
 423     m_width = pen.GetWidth();
 424     if (m_width <= 0.0)
 425         m_width = 0.1;
 426
 427     m_pen = new Pen(wxColourToColor(pen.GetColour()), m_width );
 428
 429     LineCap cap;
 430     switch ( pen.GetCap() )
 431     {
 432     case wxCAP_ROUND :
 433         cap = LineCapRound;
 434         break;
 435
 436     case wxCAP_PROJECTING :
 437         cap = LineCapSquare;
 438         break;
 439
 440     case wxCAP_BUTT :
 441         cap = LineCapFlat; // TODO verify
 442         break;
 443
 444     default :
 445         cap = LineCapFlat;
 446         break;
 447     }
 448     m_pen->SetLineCap(cap,cap, DashCapFlat);
 449
 450     LineJoin join;
 451     switch ( pen.GetJoin() )
 452     {
 453     case wxJOIN_BEVEL :
 454         join = LineJoinBevel;
 455         break;
 456
 457     case wxJOIN_MITER :
 458         join = LineJoinMiter;
 459         break;
 460
 461     case wxJOIN_ROUND :
 462         join = LineJoinRound;
 463         break;
 464
 465     default :
 466         join = LineJoinMiter;
 467         break;
 468     }
 469
 470     m_pen->SetLineJoin(join);
 471
 472     m_pen->SetDashStyle(DashStyleSolid);
 473
 474     DashStyle dashStyle = DashStyleSolid;
 475     switch ( pen.GetStyle() )
 476     {
 477     case wxSOLID :
 478         break;
 479
 480     case wxDOT :
 481         dashStyle = DashStyleDot;
 482         break;
 483
 484     case wxLONG_DASH :
 485         dashStyle = DashStyleDash; // TODO verify
 486         break;
 487
 488     case wxSHORT_DASH :
 489         dashStyle = DashStyleDash;
 490         break;
 491
 492     case wxDOT_DASH :
 493         dashStyle = DashStyleDashDot;
 494         break;
 495     case wxUSER_DASH :
 496         {
 497             dashStyle = DashStyleCustom;
 498             wxDash *dashes;
 499             int count = pen.GetDashes( &dashes );
 500             if ((dashes != NULL) && (count > 0))
 501             {
 502                 REAL *userLengths = new REAL[count];
 503                 for ( int i = 0; i < count; ++i )
 504                 {
 505                     userLengths[i] = dashes[i];
 506                 }
 507                 m_pen->SetDashPattern( userLengths, count);
 508                 delete[] userLengths;
 509             }
 510         }
 511         break;
 512     case wxSTIPPLE :
 513         {
 514             wxBitmap* bmp = pen.GetStipple();
 515             if ( bmp && bmp->Ok() )
 516             {
 517                 m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 518                 m_penBrush = new TextureBrush(m_penImage);
 519                 m_pen->SetBrush( m_penBrush );
 520             }
 521
 522         }
 523         break;
 524     default :
 525         if ( pen.GetStyle() >= wxFIRST_HATCH && pen.GetStyle() <= wxLAST_HATCH )
 526         {
 527             HatchStyle style = HatchStyleHorizontal;
 528             switch( pen.GetStyle() )
 529             {
 530             case wxBDIAGONAL_HATCH :
 531                 style = HatchStyleBackwardDiagonal;
 532                 break ;
 533             case wxCROSSDIAG_HATCH :
 534                 style = HatchStyleDiagonalCross;
 535                 break ;
 536             case wxFDIAGONAL_HATCH :
 537                 style = HatchStyleForwardDiagonal;
 538                 break ;
 539             case wxCROSS_HATCH :
 540                 style = HatchStyleCross;
 541                 break ;
 542             case wxHORIZONTAL_HATCH :
 543                 style = HatchStyleHorizontal;
 544                 break ;
 545             case wxVERTICAL_HATCH :
 546                 style = HatchStyleVertical;
 547                 break ;
 548
 549             }
 550             m_penBrush = new HatchBrush
 551                              (
 552                                 style,
 553                                 wxColourToColor(pen.GetColour()),
 554                                 Color::Transparent
 555                              );
 556             m_pen->SetBrush( m_penBrush );
 557         }
 558         break;
 559     }
 560     if ( dashStyle != DashStyleSolid )
 561         m_pen->SetDashStyle(dashStyle);
 562 }
 563
 564 //-----------------------------------------------------------------------------
 565 // wxGDIPlusBrush implementation
 566 //-----------------------------------------------------------------------------
 567
 568 wxGDIPlusBrushData::wxGDIPlusBrushData( wxGraphicsRenderer* renderer )
 569 : wxGraphicsObjectRefData(renderer)
 570 {
 571     Init();
 572 }
 573
 574 wxGDIPlusBrushData::wxGDIPlusBrushData( wxGraphicsRenderer* renderer , const wxBrush &brush )
 575 : wxGraphicsObjectRefData(renderer)
 576 {
 577     Init();
 578     if ( brush.GetStyle() == wxSOLID)
 579     {
 580         m_brush = new SolidBrush(wxColourToColor( brush.GetColour()));
 581     }
 582     else if ( brush.IsHatch() )
 583     {
 584         HatchStyle style = HatchStyleHorizontal;
 585         switch( brush.GetStyle() )
 586         {
 587         case wxBDIAGONAL_HATCH :
 588             style = HatchStyleBackwardDiagonal;
 589             break ;
 590         case wxCROSSDIAG_HATCH :
 591             style = HatchStyleDiagonalCross;
 592             break ;
 593         case wxFDIAGONAL_HATCH :
 594             style = HatchStyleForwardDiagonal;
 595             break ;
 596         case wxCROSS_HATCH :
 597             style = HatchStyleCross;
 598             break ;
 599         case wxHORIZONTAL_HATCH :
 600             style = HatchStyleHorizontal;
 601             break ;
 602         case wxVERTICAL_HATCH :
 603             style = HatchStyleVertical;
 604             break ;
 605
 606         }
 607         m_brush = new HatchBrush
 608                       (
 609                         style,
 610                         wxColourToColor(brush.GetColour()),
 611                         Color::Transparent
 612                       );
 613     }
 614     else
 615     {
 616         wxBitmap* bmp = brush.GetStipple();
 617         if ( bmp && bmp->Ok() )
 618         {
 619             wxDELETE( m_brushImage );
 620             m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 621             m_brush = new TextureBrush(m_brushImage);
 622         }
 623     }
 624 }
 625
 626 wxGDIPlusBrushData::~wxGDIPlusBrushData()
 627 {
 628     delete m_brush;
 629     delete m_brushImage;
 630     delete m_brushPath;
 631 };
 632
 633 void wxGDIPlusBrushData::Init()
 634 {
 635     m_brush = NULL;
 636     m_brushImage= NULL;
 637     m_brushPath= NULL;
 638 }
 639
 640 template <typename T>
 641 void
 642 wxGDIPlusBrushData::SetGradientStops(T *brush,
 643         const wxGraphicsGradientStops& stops)
 644 {
 645     const unsigned numStops = stops.GetCount();
 646     if ( numStops <= 2 )
 647     {
 648         // initial and final colours are set during the brush creation, nothing
 649         // more to do
 650         return;
 651     }
 652
 653     wxVector<Color> colors(numStops);
 654     wxVector<REAL> positions(numStops);
 655
 656     for ( unsigned i = 0; i < numStops; i++ )
 657     {
 658         wxGraphicsGradientStop stop = stops.Item(i);
 659
 660         colors[i] = wxColourToColor(stop.GetColour());
 661         positions[i] = stop.GetPosition();
 662     }
 663
 664     brush->SetInterpolationColors(&colors[0], &positions[0], numStops);
 665 }
 666
 667 void
 668 wxGDIPlusBrushData::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 669                                               wxDouble x2, wxDouble y2,
 670                                               const wxGraphicsGradientStops& stops)
 671 {
 672     LinearGradientBrush * const
 673         brush = new LinearGradientBrush(PointF(x1, y1) , PointF(x2, y2),
 674                                         wxColourToColor(stops.GetStartColour()),
 675                                         wxColourToColor(stops.GetEndColour()));
 676     m_brush =  brush;
 677
 678     SetGradientStops(brush, stops);
 679 }
 680
 681 void
 682 wxGDIPlusBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 683                                               wxDouble xc, wxDouble yc,
 684                                               wxDouble radius,
 685                                               const wxGraphicsGradientStops& stops)
 686 {
 687     m_brushPath = new GraphicsPath();
 688     m_brushPath->AddEllipse( (REAL)(xc-radius), (REAL)(yc-radius),
 689                              (REAL)(2*radius), (REAL)(2*radius));
 690
 691     PathGradientBrush * const brush = new PathGradientBrush(m_brushPath);
 692     m_brush = brush;
 693     brush->SetCenterPoint(PointF(xo, yo));
 694     brush->SetCenterColor(wxColourToColor(stops.GetStartColour()));
 695
 696     const Color col(wxColourToColor(stops.GetEndColour()));
 697     int count = 1;
 698     brush->SetSurroundColors(&col, &count);
 699
 700     SetGradientStops(brush, stops);
 701 }
 702
 703 //-----------------------------------------------------------------------------
 704 // wxGDIPlusFont implementation
 705 //-----------------------------------------------------------------------------
 706
 707 wxGDIPlusFontData::wxGDIPlusFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 708                              const wxColour& col ) : wxGraphicsObjectRefData( renderer )
 709 {
 710     m_textBrush = NULL;
 711     m_font = NULL;
 712
 713     wxWCharBuffer s = font.GetFaceName().wc_str( *wxConvUI );
 714     int size = font.GetPointSize();
 715     int style = FontStyleRegular;
 716     if ( font.GetStyle() == wxFONTSTYLE_ITALIC )
 717         style |= FontStyleItalic;
 718     if ( font.GetUnderlined() )
 719         style |= FontStyleUnderline;
 720     if ( font.GetWeight() == wxFONTWEIGHT_BOLD )
 721         style |= FontStyleBold;
 722     m_font = new Font( s , size , style );
 723     m_textBrush = new SolidBrush(wxColourToColor(col));
 724 }
 725
 726 wxGDIPlusFontData::~wxGDIPlusFontData()
 727 {
 728     delete m_textBrush;
 729     delete m_font;
 730 }
 731
 732 // the built-in conversions functions create non-premultiplied bitmaps, while GDIPlus needs them in the
 733 // premultiplied format, therefore in the failing cases we create a new bitmap using the non-premultiplied
 734 // bytes as parameter, since there is no real copying of the data going in, only references are stored
 735 // m_helper has to be kept alive as well
 736
 737 //-----------------------------------------------------------------------------
 738 // wxGDIPlusBitmapData implementation
 739 //-----------------------------------------------------------------------------
 740
 741 wxGDIPlusBitmapData::wxGDIPlusBitmapData( wxGraphicsRenderer* renderer, Bitmap* bitmap ) :
 742     wxGraphicsObjectRefData( renderer ), m_bitmap( bitmap )
 743 {
 744     m_helper = NULL;
 745 }
 746
 747 wxGDIPlusBitmapData::wxGDIPlusBitmapData( wxGraphicsRenderer* renderer,
 748                         const wxBitmap &bmp) : wxGraphicsObjectRefData( renderer )
 749 {
 750     m_bitmap = NULL;
 751     m_helper = NULL;
 752
 753     Bitmap* image = NULL;
 754     if ( bmp.GetMask() )
 755     {
 756         Bitmap interim((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE()) ;
 757
 758         size_t width = interim.GetWidth();
 759         size_t height = interim.GetHeight();
 760         Rect bounds(0,0,width,height);
 761
 762         image = new Bitmap(width,height,PixelFormat32bppPARGB) ;
 763
 764         Bitmap interimMask((HBITMAP)bmp.GetMask()->GetMaskBitmap(),NULL);
 765         wxASSERT(interimMask.GetPixelFormat() == PixelFormat1bppIndexed);
 766
 767         BitmapData dataMask ;
 768         interimMask.LockBits(&bounds,ImageLockModeRead,
 769             interimMask.GetPixelFormat(),&dataMask);
 770
 771
 772         BitmapData imageData ;
 773         image->LockBits(&bounds,ImageLockModeWrite, PixelFormat32bppPARGB, &imageData);
 774
 775         BYTE maskPattern = 0 ;
 776         BYTE maskByte = 0;
 777         size_t maskIndex ;
 778
 779         for ( size_t y = 0 ; y < height ; ++y)
 780         {
 781             maskIndex = 0 ;
 782             for( size_t x = 0 ; x < width; ++x)
 783             {
 784                 if ( x % 8 == 0)
 785                 {
 786                     maskPattern = 0x80;
 787                     maskByte = *((BYTE*)dataMask.Scan0 + dataMask.Stride*y + maskIndex);
 788                     maskIndex++;
 789                 }
 790                 else
 791                     maskPattern = maskPattern >> 1;
 792
 793                 ARGB *dest = (ARGB*)((BYTE*)imageData.Scan0 + imageData.Stride*y + x*4);
 794                 if ( (maskByte & maskPattern) == 0 )
 795                     *dest = 0x00000000;
 796                 else
 797                 {
 798                     Color c ;
 799                     interim.GetPixel(x,y,&c) ;
 800                     *dest = (c.GetValue() | Color::AlphaMask);
 801                 }
 802             }
 803         }
 804
 805         image->UnlockBits(&imageData);
 806
 807         interimMask.UnlockBits(&dataMask);
 808         interim.UnlockBits(&dataMask);
 809     }
 810     else
 811     {
 812         image = Bitmap::FromHBITMAP((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE());
 813         if ( bmp.HasAlpha() && GetPixelFormatSize(image->GetPixelFormat()) == 32 )
 814         {
 815             size_t width = image->GetWidth();
 816             size_t height = image->GetHeight();
 817             Rect bounds(0,0,width,height);
 818             static BitmapData data ;
 819
 820             m_helper = image ;
 821             image = NULL ;
 822             m_helper->LockBits(&bounds, ImageLockModeRead,
 823                 m_helper->GetPixelFormat(),&data);
 824
 825             image = new Bitmap(data.Width, data.Height, data.Stride,
 826                 PixelFormat32bppPARGB , (BYTE*) data.Scan0);
 827
 828             m_helper->UnlockBits(&data);
 829         }
 830     }
 831     if ( image )
 832         m_bitmap = image;
 833 }
 834
 835 wxGDIPlusBitmapData::~wxGDIPlusBitmapData()
 836 {
 837     delete m_bitmap;
 838     delete m_helper;
 839 }
 840
 841 //-----------------------------------------------------------------------------
 842 // wxGDIPlusPath implementation
 843 //-----------------------------------------------------------------------------
 844
 845 wxGDIPlusPathData::wxGDIPlusPathData(wxGraphicsRenderer* renderer, GraphicsPath* path ) : wxGraphicsPathData(renderer)
 846 {
 847     if ( path )
 848         m_path = path;
 849     else
 850         m_path = new GraphicsPath();
 851 }
 852
 853 wxGDIPlusPathData::~wxGDIPlusPathData()
 854 {
 855     delete m_path;
 856 }
 857
 858 wxGraphicsObjectRefData* wxGDIPlusPathData::Clone() const
 859 {
 860     return new wxGDIPlusPathData( GetRenderer() , m_path->Clone());
 861 }
 862
 863 //
 864 // The Primitives
 865 //
 866
 867 void wxGDIPlusPathData::MoveToPoint( wxDouble x , wxDouble y )
 868 {
 869     m_path->StartFigure();
 870     m_path->AddLine((REAL) x,(REAL) y,(REAL) x,(REAL) y);
 871 }
 872
 873 void wxGDIPlusPathData::AddLineToPoint( wxDouble x , wxDouble y )
 874 {
 875     m_path->AddLine((REAL) x,(REAL) y,(REAL) x,(REAL) y);
 876 }
 877
 878 void wxGDIPlusPathData::CloseSubpath()
 879 {
 880     m_path->CloseFigure();
 881 }
 882
 883 void wxGDIPlusPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 884 {
 885     PointF c1(cx1,cy1);
 886     PointF c2(cx2,cy2);
 887     PointF end(x,y);
 888     PointF start;
 889     m_path->GetLastPoint(&start);
 890     m_path->AddBezier(start,c1,c2,end);
 891 }
 892
 893 // gets the last point of the current path, (0,0) if not yet set
 894 void wxGDIPlusPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
 895 {
 896     PointF start;
 897     m_path->GetLastPoint(&start);
 898     *x = start.X ;
 899     *y = start.Y ;
 900 }
 901
 902 void wxGDIPlusPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 903 {
 904     double sweepAngle = endAngle - startAngle ;
 905     if( fabs(sweepAngle) >= 2*M_PI)
 906     {
 907         sweepAngle = 2 * M_PI;
 908     }
 909     else
 910     {
 911         if ( clockwise )
 912         {
 913             if( sweepAngle < 0 )
 914                 sweepAngle += 2 * M_PI;
 915         }
 916         else
 917         {
 918             if( sweepAngle > 0 )
 919                 sweepAngle -= 2 * M_PI;
 920
 921         }
 922    }
 923    m_path->AddArc((REAL) (x-r),(REAL) (y-r),(REAL) (2*r),(REAL) (2*r),RadToDeg(startAngle),RadToDeg(sweepAngle));
 924 }
 925
 926 void wxGDIPlusPathData::AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 927 {
 928     m_path->AddRectangle(RectF(x,y,w,h));
 929 }
 930
 931 void wxGDIPlusPathData::AddPath( const wxGraphicsPathData* path )
 932 {
 933     m_path->AddPath( (GraphicsPath*) path->GetNativePath(), FALSE);
 934 }
 935
 936
 937 // transforms each point of this path by the matrix
 938 void wxGDIPlusPathData::Transform( const wxGraphicsMatrixData* matrix )
 939 {
 940     m_path->Transform( (Matrix*) matrix->GetNativeMatrix() );
 941 }
 942
 943 // gets the bounding box enclosing all points (possibly including control points)
 944 void wxGDIPlusPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
 945 {
 946     RectF bounds;
 947     m_path->GetBounds( &bounds, NULL, NULL) ;
 948     *x = bounds.X;
 949     *y = bounds.Y;
 950     *w = bounds.Width;
 951     *h = bounds.Height;
 952 }
 953
 954 bool wxGDIPlusPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle ) const
 955 {
 956     m_path->SetFillMode( fillStyle == wxODDEVEN_RULE ? FillModeAlternate : FillModeWinding);
 957     return m_path->IsVisible( (FLOAT) x,(FLOAT) y) == TRUE ;
 958 }
 959
 960 //-----------------------------------------------------------------------------
 961 // wxGDIPlusMatrixData implementation
 962 //-----------------------------------------------------------------------------
 963
 964 wxGDIPlusMatrixData::wxGDIPlusMatrixData(wxGraphicsRenderer* renderer, Matrix* matrix )
 965     : wxGraphicsMatrixData(renderer)
 966 {
 967     if ( matrix )
 968         m_matrix = matrix ;
 969     else
 970         m_matrix = new Matrix();
 971 }
 972
 973 wxGDIPlusMatrixData::~wxGDIPlusMatrixData()
 974 {
 975     delete m_matrix;
 976 }
 977
 978 wxGraphicsObjectRefData *wxGDIPlusMatrixData::Clone() const
 979 {
 980     return new wxGDIPlusMatrixData( GetRenderer(), m_matrix->Clone());
 981 }
 982
 983 // concatenates the matrix
 984 void wxGDIPlusMatrixData::Concat( const wxGraphicsMatrixData *t )
 985 {
 986     m_matrix->Multiply( (Matrix*) t->GetNativeMatrix());
 987 }
 988
 989 // sets the matrix to the respective values
 990 void wxGDIPlusMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
 991                  wxDouble tx, wxDouble ty)
 992 {
 993     m_matrix->SetElements(a,b,c,d,tx,ty);
 994 }
 995
 996 // gets the component valuess of the matrix
 997 void wxGDIPlusMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
 998                               wxDouble* d, wxDouble* tx, wxDouble* ty) const
 999 {
1000     REAL elements[6];
1001     m_matrix->GetElements(elements);
1002     if (a)  *a = elements[0];
1003     if (b)  *b = elements[1];
1004     if (c)  *c = elements[2];
1005     if (d)  *d = elements[3];
1006     if (tx) *tx= elements[4];
1007     if (ty) *ty= elements[5];
1008 }
1009
1010 // makes this the inverse matrix
1011 void wxGDIPlusMatrixData::Invert()
1012 {
1013     m_matrix->Invert();
1014 }
1015
1016 // returns true if the elements of the transformation matrix are equal ?
1017 bool wxGDIPlusMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
1018 {
1019     return m_matrix->Equals((Matrix*) t->GetNativeMatrix())== TRUE ;
1020 }
1021
1022 // return true if this is the identity matrix
1023 bool wxGDIPlusMatrixData::IsIdentity() const
1024 {
1025     return m_matrix->IsIdentity() == TRUE ;
1026 }
1027
1028 //
1029 // transformation
1030 //
1031
1032 // add the translation to this matrix
1033 void wxGDIPlusMatrixData::Translate( wxDouble dx , wxDouble dy )
1034 {
1035     m_matrix->Translate(dx,dy);
1036 }
1037
1038 // add the scale to this matrix
1039 void wxGDIPlusMatrixData::Scale( wxDouble xScale , wxDouble yScale )
1040 {
1041     m_matrix->Scale(xScale,yScale);
1042 }
1043
1044 // add the rotation to this matrix (radians)
1045 void wxGDIPlusMatrixData::Rotate( wxDouble angle )
1046 {
1047     m_matrix->Rotate( angle );
1048 }
1049
1050 //
1051 // apply the transforms
1052 //
1053
1054 // applies that matrix to the point
1055 void wxGDIPlusMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
1056 {
1057     PointF pt(*x,*y);
1058     m_matrix->TransformPoints(&pt);
1059     *x = pt.X;
1060     *y = pt.Y;
1061 }
1062
1063 // applies the matrix except for translations
1064 void wxGDIPlusMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1065 {
1066     PointF pt(*dx,*dy);
1067     m_matrix->TransformVectors(&pt);
1068     *dx = pt.X;
1069     *dy = pt.Y;
1070 }
1071
1072 // returns the native representation
1073 void * wxGDIPlusMatrixData::GetNativeMatrix() const
1074 {
1075     return m_matrix;
1076 }
1077
1078 //-----------------------------------------------------------------------------
1079 // wxGDIPlusContext implementation
1080 //-----------------------------------------------------------------------------
1081
1082 IMPLEMENT_DYNAMIC_CLASS(wxGDIPlusContext,wxGraphicsContext)
1083 IMPLEMENT_DYNAMIC_CLASS(wxGDIPlusMeasuringContext,wxGDIPlusContext)
1084
1085 class wxGDIPlusOffsetHelper
1086 {
1087 public :
1088     wxGDIPlusOffsetHelper( Graphics* gr , bool offset )
1089     {
1090         m_gr = gr;
1091         m_offset = offset;
1092         if ( m_offset )
1093             m_gr->TranslateTransform( 0.5, 0.5 );
1094     }
1095     ~wxGDIPlusOffsetHelper( )
1096     {
1097         if ( m_offset )
1098             m_gr->TranslateTransform( -0.5, -0.5 );
1099     }
1100 public :
1101     Graphics* m_gr;
1102     bool m_offset;
1103 } ;
1104
1105 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, HDC hdc, wxDouble width, wxDouble height   )
1106     : wxGraphicsContext(renderer)
1107 {
1108     Init();
1109     m_context = new Graphics( hdc);
1110     m_width = width;
1111     m_height = height;
1112     SetDefaults();
1113 }
1114
1115 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, HWND hwnd  )
1116     : wxGraphicsContext(renderer)
1117 {
1118     Init();
1119     m_context = new Graphics( hwnd);
1120     RECT rect = wxGetWindowRect(hwnd);
1121     m_width = rect.right - rect.left;
1122     m_height = rect.bottom - rect.top;
1123     SetDefaults();
1124 }
1125
1126 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, Graphics* gr  )
1127     : wxGraphicsContext(renderer)
1128 {
1129     Init();
1130     m_context = gr;
1131     SetDefaults();
1132 }
1133
1134 wxGDIPlusContext::wxGDIPlusContext() : wxGraphicsContext(NULL)
1135 {
1136     Init();
1137 }
1138
1139 void wxGDIPlusContext::Init()
1140 {
1141     m_context = NULL;
1142     m_state1 = 0;
1143     m_state2= 0;
1144     m_height = 0;
1145     m_width = 0;
1146 }
1147
1148 void wxGDIPlusContext::SetDefaults()
1149 {
1150     m_context->SetTextRenderingHint(TextRenderingHintSystemDefault);
1151     m_context->SetPixelOffsetMode(PixelOffsetModeHalf);
1152     m_context->SetSmoothingMode(SmoothingModeHighQuality);
1153     m_state1 = m_context->Save();
1154     m_state2 = m_context->Save();
1155
1156     // Setup page scale, based on DPI ratio.
1157     // Antecedent should be 100dpi when the default page unit (UnitDisplay)
1158     // is used. Page unit UnitDocument would require 300dpi instead.
1159     // Note that calling SetPageScale() does not have effect on non-printing
1160     // DCs (that is, any other than wxPrinterDC or wxEnhMetaFileDC).
1161     REAL dpiRatio = 100.0 / m_context->GetDpiY();
1162     m_context->SetPageScale(dpiRatio);
1163 }
1164
1165 wxGDIPlusContext::~wxGDIPlusContext()
1166 {
1167     if ( m_context )
1168     {
1169         m_context->Restore( m_state2 );
1170         m_context->Restore( m_state1 );
1171         delete m_context;
1172     }
1173 }
1174
1175
1176 void wxGDIPlusContext::Clip( const wxRegion &region )
1177 {
1178     Region rgn((HRGN)region.GetHRGN());
1179     m_context->SetClip(&rgn,CombineModeIntersect);
1180 }
1181
1182 void wxGDIPlusContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1183 {
1184     m_context->SetClip(RectF(x,y,w,h),CombineModeIntersect);
1185 }
1186
1187 void wxGDIPlusContext::ResetClip()
1188 {
1189     m_context->ResetClip();
1190 }
1191
1192 void wxGDIPlusContext::StrokeLines( size_t n, const wxPoint2DDouble *points)
1193 {
1194    if (m_composition == wxCOMPOSITION_DEST)
1195         return;
1196
1197    if ( !m_pen.IsNull() )
1198    {
1199        wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
1200        Point *cpoints = new Point[n];
1201        for (size_t i = 0; i < n; i++)
1202        {
1203            cpoints[i].X = (int)(points[i].m_x );
1204            cpoints[i].Y = (int)(points[i].m_y );
1205
1206        } // for (size_t i = 0; i < n; i++)
1207        m_context->DrawLines( ((wxGDIPlusPenData*)m_pen.GetGraphicsData())->GetGDIPlusPen() , cpoints , n ) ;
1208        delete[] cpoints;
1209    }
1210 }
1211
1212 void wxGDIPlusContext::DrawLines( size_t n, const wxPoint2DDouble *points, wxPolygonFillMode WXUNUSED(fillStyle) )
1213 {
1214    if (m_composition == wxCOMPOSITION_DEST)
1215         return;
1216
1217     wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
1218     Point *cpoints = new Point[n];
1219     for (size_t i = 0; i < n; i++)
1220     {
1221         cpoints[i].X = (int)(points[i].m_x );
1222         cpoints[i].Y = (int)(points[i].m_y );
1223
1224     } // for (int i = 0; i < n; i++)
1225     if ( !m_brush.IsNull() )
1226         m_context->FillPolygon( ((wxGDIPlusBrushData*)m_brush.GetRefData())->GetGDIPlusBrush() , cpoints , n ) ;
1227     if ( !m_pen.IsNull() )
1228         m_context->DrawLines( ((wxGDIPlusPenData*)m_pen.GetGraphicsData())->GetGDIPlusPen() , cpoints , n ) ;
1229     delete[] cpoints;
1230 }
1231
1232 void wxGDIPlusContext::StrokePath( const wxGraphicsPath& path )
1233 {
1234    if (m_composition == wxCOMPOSITION_DEST)
1235         return;
1236
1237     if ( !m_pen.IsNull() )
1238     {
1239         wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
1240         m_context->DrawPath( ((wxGDIPlusPenData*)m_pen.GetGraphicsData())->GetGDIPlusPen() , (GraphicsPath*) path.GetNativePath() );
1241     }
1242 }
1243
1244 void wxGDIPlusContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1245 {
1246    if (m_composition == wxCOMPOSITION_DEST)
1247         return;
1248
1249     if ( !m_brush.IsNull() )
1250     {
1251         wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
1252         ((GraphicsPath*) path.GetNativePath())->SetFillMode( fillStyle == wxODDEVEN_RULE ? FillModeAlternate : FillModeWinding);
1253         m_context->FillPath( ((wxGDIPlusBrushData*)m_brush.GetRefData())->GetGDIPlusBrush() ,
1254             (GraphicsPath*) path.GetNativePath());
1255     }
1256 }
1257
1258 bool wxGDIPlusContext::SetAntialiasMode(wxAntialiasMode antialias)
1259 {
1260     if (m_antialias == antialias)
1261         return true;
1262
1263     m_antialias = antialias;
1264
1265     SmoothingMode antialiasMode;
1266     switch (antialias)
1267     {
1268         case wxANTIALIAS_DEFAULT:
1269             antialiasMode = SmoothingModeHighQuality;
1270             break;
1271         case wxANTIALIAS_NONE:
1272             antialiasMode = SmoothingModeNone;
1273             break;
1274         default:
1275             return false;
1276     }
1277     m_context->SetSmoothingMode(antialiasMode);
1278     return true;
1279 }
1280
1281 bool wxGDIPlusContext::SetCompositionMode(wxCompositionMode op)
1282 {
1283     if ( m_composition == op )
1284         return true;
1285
1286     m_composition = op;
1287
1288     if (m_composition == wxCOMPOSITION_DEST)
1289         return true;
1290
1291     CompositingMode cop;
1292     switch (op)
1293     {
1294         case wxCOMPOSITION_SOURCE:
1295             cop = CompositingModeSourceCopy;
1296             break;
1297         case wxCOMPOSITION_OVER:
1298             cop = CompositingModeSourceOver;
1299             break;
1300         default:
1301             return false;
1302     }
1303
1304     m_context->SetCompositingMode(cop);
1305     return true;
1306 }
1307
1308 void wxGDIPlusContext::BeginLayer(wxDouble /* opacity */)
1309 {
1310     // TODO
1311 }
1312
1313 void wxGDIPlusContext::EndLayer()
1314 {
1315     // TODO
1316 }
1317
1318 void wxGDIPlusContext::Rotate( wxDouble angle )
1319 {
1320     m_context->RotateTransform( RadToDeg(angle) );
1321 }
1322
1323 void wxGDIPlusContext::Translate( wxDouble dx , wxDouble dy )
1324 {
1325     m_context->TranslateTransform( dx , dy );
1326 }
1327
1328 void wxGDIPlusContext::Scale( wxDouble xScale , wxDouble yScale )
1329 {
1330     m_context->ScaleTransform(xScale,yScale);
1331 }
1332
1333 void wxGDIPlusContext::PushState()
1334 {
1335     GraphicsState state = m_context->Save();
1336     m_stateStack.push(state);
1337 }
1338
1339 void wxGDIPlusContext::PopState()
1340 {
1341     GraphicsState state = m_stateStack.top();
1342     m_stateStack.pop();
1343     m_context->Restore(state);
1344 }
1345
1346 void wxGDIPlusContext::DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1347 {
1348    if (m_composition == wxCOMPOSITION_DEST)
1349         return;
1350
1351     Bitmap* image = static_cast<wxGDIPlusBitmapData*>(bmp.GetRefData())->GetGDIPlusBitmap();
1352     if ( image )
1353     {
1354         if( image->GetWidth() != (UINT) w || image->GetHeight() != (UINT) h )
1355         {
1356             Rect drawRect((REAL) x, (REAL)y, (REAL)w, (REAL)h);
1357             m_context->SetPixelOffsetMode( PixelOffsetModeNone );
1358             m_context->DrawImage(image, drawRect, 0 , 0 , image->GetWidth()-1, image->GetHeight()-1, UnitPixel ) ;
1359             m_context->SetPixelOffsetMode( PixelOffsetModeHalf );
1360         }
1361         else
1362             m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
1363     }
1364 }
1365
1366 void wxGDIPlusContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1367 {
1368     wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp);
1369     DrawBitmap(bitmap, x, y, w, h);
1370 }
1371
1372 void wxGDIPlusContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1373 {
1374    if (m_composition == wxCOMPOSITION_DEST)
1375         return;
1376
1377     // the built-in conversion fails when there is alpha in the HICON (eg XP style icons), we can only
1378     // find out by looking at the bitmap data whether there really was alpha in it
1379     HICON hIcon = (HICON)icon.GetHICON();
1380     ICONINFO iconInfo ;
1381     // IconInfo creates the bitmaps for color and mask, we must dispose of them after use
1382     if (!GetIconInfo(hIcon,&iconInfo))
1383         return;
1384
1385     Bitmap interim(iconInfo.hbmColor,NULL);
1386
1387     Bitmap* image = NULL ;
1388
1389     // if it's not 32 bit, it doesn't have an alpha channel, note that since the conversion doesn't
1390     // work correctly, asking IsAlphaPixelFormat at this point fails as well
1391     if( GetPixelFormatSize(interim.GetPixelFormat())!= 32 )
1392     {
1393         image = Bitmap::FromHICON(hIcon);
1394     }
1395     else
1396     {
1397         size_t width = interim.GetWidth();
1398         size_t height = interim.GetHeight();
1399         Rect bounds(0,0,width,height);
1400         BitmapData data ;
1401
1402         interim.LockBits(&bounds, ImageLockModeRead,
1403             interim.GetPixelFormat(),&data);
1404
1405         bool hasAlpha = false;
1406         for ( size_t y = 0 ; y < height && !hasAlpha ; ++y)
1407         {
1408             for( size_t x = 0 ; x < width && !hasAlpha; ++x)
1409             {
1410                 ARGB *dest = (ARGB*)((BYTE*)data.Scan0 + data.Stride*y + x*4);
1411                 if ( ( *dest & Color::AlphaMask ) != 0 )
1412                     hasAlpha = true;
1413             }
1414         }
1415
1416         if ( hasAlpha )
1417         {
1418         image = new Bitmap(data.Width, data.Height, data.Stride,
1419             PixelFormat32bppARGB , (BYTE*) data.Scan0);
1420         }
1421         else
1422         {
1423             image = Bitmap::FromHICON(hIcon);
1424         }
1425
1426         interim.UnlockBits(&data);
1427     }
1428
1429     m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
1430
1431     delete image ;
1432     DeleteObject(iconInfo.hbmColor);
1433     DeleteObject(iconInfo.hbmMask);
1434 }
1435
1436 void wxGDIPlusContext::DoDrawFilledText(const wxString& str,
1437                                         wxDouble x, wxDouble y,
1438                                         const wxGraphicsBrush& brush)
1439 {
1440    if (m_composition == wxCOMPOSITION_DEST)
1441         return;
1442
1443     wxCHECK_RET( !m_font.IsNull(),
1444                  wxT("wxGDIPlusContext::DrawText - no valid font set") );
1445
1446     if ( str.IsEmpty())
1447         return ;
1448
1449     wxGDIPlusFontData * const
1450         fontData = (wxGDIPlusFontData *)m_font.GetRefData();
1451     wxGDIPlusBrushData * const
1452         brushData = (wxGDIPlusBrushData *)brush.GetRefData();
1453
1454     m_context->DrawString
1455                (
1456                     str.wc_str(*wxConvUI),  // string to draw, always Unicode
1457                     -1,                     // length: string is NUL-terminated
1458                     fontData->GetGDIPlusFont(),
1459                     PointF(x, y),
1460                     StringFormat::GenericTypographic(),
1461                     brushData ? brushData->GetGDIPlusBrush()
1462                               : fontData->GetGDIPlusBrush()
1463                );
1464 }
1465
1466 void wxGDIPlusContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1467                                      wxDouble *descent, wxDouble *externalLeading ) const
1468 {
1469     wxCHECK_RET( !m_font.IsNull(), wxT("wxGDIPlusContext::GetTextExtent - no valid font set") );
1470
1471     wxWCharBuffer s = str.wc_str( *wxConvUI );
1472     FontFamily ffamily ;
1473     Font* f = ((wxGDIPlusFontData*)m_font.GetRefData())->GetGDIPlusFont();
1474
1475     f->GetFamily(&ffamily) ;
1476
1477     REAL factorY = m_context->GetDpiY() / 72.0 ;
1478
1479     REAL rDescent = ffamily.GetCellDescent(FontStyleRegular) *
1480         f->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
1481     REAL rAscent = ffamily.GetCellAscent(FontStyleRegular) *
1482         f->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
1483     REAL rHeight = ffamily.GetLineSpacing(FontStyleRegular) *
1484         f->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
1485
1486     if ( height )
1487         *height = rHeight * factorY;
1488     if ( descent )
1489         *descent = rDescent * factorY;
1490     if ( externalLeading )
1491         *externalLeading = (rHeight - rAscent - rDescent) * factorY;
1492     // measuring empty strings is not guaranteed, so do it by hand
1493     if ( str.IsEmpty())
1494     {
1495         if ( width )
1496             *width = 0 ;
1497     }
1498     else
1499     {
1500         RectF layoutRect(0,0, 100000.0f, 100000.0f);
1501         StringFormat strFormat( StringFormat::GenericTypographic() );
1502         strFormat.SetFormatFlags( StringFormatFlagsMeasureTrailingSpaces | strFormat.GetFormatFlags() );
1503
1504         RectF bounds ;
1505         m_context->MeasureString((const wchar_t *) s , wcslen(s) , f, layoutRect, &strFormat, &bounds ) ;
1506         if ( width )
1507             *width = bounds.Width;
1508         if ( height )
1509             *height = bounds.Height;
1510     }
1511 }
1512
1513 void wxGDIPlusContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
1514 {
1515     widths.Empty();
1516     widths.Add(0, text.length());
1517
1518     wxCHECK_RET( !m_font.IsNull(), wxT("wxGDIPlusContext::GetPartialTextExtents - no valid font set") );
1519
1520     if (text.empty())
1521         return;
1522
1523     Font* f = ((wxGDIPlusFontData*)m_font.GetRefData())->GetGDIPlusFont();
1524     wxWCharBuffer ws = text.wc_str( *wxConvUI );
1525     size_t len = wcslen( ws ) ;
1526     wxASSERT_MSG(text.length() == len , wxT("GetPartialTextExtents not yet implemented for multichar situations"));
1527
1528     RectF layoutRect(0,0, 100000.0f, 100000.0f);
1529     StringFormat strFormat( StringFormat::GenericTypographic() );
1530
1531     size_t startPosition = 0;
1532     size_t remainder = len;
1533     const size_t maxSpan = 32;
1534     CharacterRange* ranges = new CharacterRange[maxSpan] ;
1535     Region* regions = new Region[maxSpan];
1536
1537     while( remainder > 0 )
1538     {
1539         size_t span = wxMin( maxSpan, remainder );
1540
1541         for( size_t i = 0 ; i < span ; ++i)
1542         {
1543             ranges[i].First = 0 ;
1544             ranges[i].Length = startPosition+i+1 ;
1545         }
1546         strFormat.SetMeasurableCharacterRanges(span,ranges);
1547         strFormat.SetFormatFlags( StringFormatFlagsMeasureTrailingSpaces | strFormat.GetFormatFlags() );
1548         m_context->MeasureCharacterRanges(ws, -1 , f,layoutRect, &strFormat,span,regions) ;
1549
1550         RectF bbox ;
1551         for ( size_t i = 0 ; i < span ; ++i)
1552         {
1553             regions[i].GetBounds(&bbox,m_context);
1554             widths[startPosition+i] = bbox.Width;
1555         }
1556         remainder -= span;
1557         startPosition += span;
1558     }
1559
1560     delete[] ranges;
1561     delete[] regions;
1562 }
1563
1564 bool wxGDIPlusContext::ShouldOffset() const
1565 {
1566     int penwidth = 0 ;
1567     if ( !m_pen.IsNull() )
1568     {
1569         penwidth = (int)((wxGDIPlusPenData*)m_pen.GetRefData())->GetWidth();
1570         if ( penwidth == 0 )
1571             penwidth = 1;
1572     }
1573     return ( penwidth % 2 ) == 1;
1574 }
1575
1576 void* wxGDIPlusContext::GetNativeContext()
1577 {
1578     return m_context;
1579 }
1580
1581 // concatenates this transform with the current transform of this context
1582 void wxGDIPlusContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1583 {
1584     m_context->MultiplyTransform((Matrix*) matrix.GetNativeMatrix());
1585 }
1586
1587 // sets the transform of this context
1588 void wxGDIPlusContext::SetTransform( const wxGraphicsMatrix& matrix )
1589 {
1590     m_context->SetTransform((Matrix*) matrix.GetNativeMatrix());
1591 }
1592
1593 // gets the matrix of this context
1594 wxGraphicsMatrix wxGDIPlusContext::GetTransform() const
1595 {
1596     wxGraphicsMatrix matrix = CreateMatrix();
1597     m_context->GetTransform((Matrix*) matrix.GetNativeMatrix());
1598     return matrix;
1599 }
1600
1601 void wxGDIPlusContext::GetSize( wxDouble* width, wxDouble *height )
1602 {
1603     *width = m_width;
1604     *height = m_height;
1605 }
1606 //-----------------------------------------------------------------------------
1607 // wxGDIPlusRenderer declaration
1608 //-----------------------------------------------------------------------------
1609
1610 class wxGDIPlusRenderer : public wxGraphicsRenderer
1611 {
1612 public :
1613     wxGDIPlusRenderer()
1614     {
1615         m_loaded = -1;
1616         m_gditoken = 0;
1617     }
1618
1619     virtual ~wxGDIPlusRenderer()
1620     {
1621         if ( m_loaded == 1 )
1622         {
1623             Unload();
1624         }
1625     }
1626
1627     // Context
1628
1629     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
1630
1631     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
1632
1633     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
1634
1635     virtual wxGraphicsContext * CreateContext( const wxEnhMetaFileDC& dc);
1636
1637     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
1638
1639     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
1640
1641     virtual wxGraphicsContext * CreateContext( wxWindow* window );
1642
1643     virtual wxGraphicsContext * CreateMeasuringContext();
1644
1645     // Path
1646
1647     virtual wxGraphicsPath CreatePath();
1648
1649     // Matrix
1650
1651     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
1652         wxDouble tx=0.0, wxDouble ty=0.0);
1653
1654
1655     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
1656
1657     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
1658
1659     virtual wxGraphicsBrush
1660     CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
1661                               wxDouble x2, wxDouble y2,
1662                               const wxGraphicsGradientStops& stops);
1663
1664     virtual wxGraphicsBrush
1665     CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
1666                               wxDouble xc, wxDouble yc,
1667                               wxDouble radius,
1668                               const wxGraphicsGradientStops& stops);
1669     // sets the font
1670     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
1671
1672     // create a native bitmap representation
1673     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap );
1674
1675     // create a graphics bitmap from a native bitmap
1676     virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
1677
1678     // create a subimage from a native image representation
1679     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  );
1680
1681 protected :
1682     bool EnsureIsLoaded();
1683     void Load();
1684     void Unload();
1685     friend class wxGDIPlusRendererModule;
1686
1687 private :
1688     int m_loaded;
1689     ULONG_PTR m_gditoken;
1690
1691     DECLARE_DYNAMIC_CLASS_NO_COPY(wxGDIPlusRenderer)
1692 } ;
1693
1694 //-----------------------------------------------------------------------------
1695 // wxGDIPlusRenderer implementation
1696 //-----------------------------------------------------------------------------
1697
1698 IMPLEMENT_DYNAMIC_CLASS(wxGDIPlusRenderer,wxGraphicsRenderer)
1699
1700 static wxGDIPlusRenderer gs_GDIPlusRenderer;
1701
1702 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
1703 {
1704     return &gs_GDIPlusRenderer;
1705 }
1706
1707 bool wxGDIPlusRenderer::EnsureIsLoaded()
1708 {
1709     // load gdiplus.dll if not yet loaded, but don't bother doing it again
1710     // if we already tried and failed (we don't want to spend lot of time
1711     // returning NULL from wxGraphicsContext::Create(), which may be called
1712     // relatively frequently):
1713     if ( m_loaded == -1 )
1714     {
1715         Load();
1716     }
1717
1718     return m_loaded == 1;
1719 }
1720
1721 // call EnsureIsLoaded() and return returnOnFail value if it fails
1722 #define ENSURE_LOADED_OR_RETURN(returnOnFail)  \
1723     if ( !EnsureIsLoaded() )                   \
1724         return (returnOnFail)
1725
1726
1727 void wxGDIPlusRenderer::Load()
1728 {
1729     GdiplusStartupInput input;
1730     GdiplusStartupOutput output;
1731     if ( GdiplusStartup(&m_gditoken,&input,&output) == Gdiplus::Ok )
1732     {
1733         wxLogTrace("gdiplus", "successfully initialized GDI+");
1734         m_loaded = 1;
1735     }
1736     else
1737     {
1738         wxLogTrace("gdiplus", "failed to initialize GDI+, missing gdiplus.dll?");
1739         m_loaded = 0;
1740     }
1741 }
1742
1743 void wxGDIPlusRenderer::Unload()
1744 {
1745     if ( m_gditoken )
1746     {
1747         GdiplusShutdown(m_gditoken);
1748         m_gditoken = NULL;
1749     }
1750     m_loaded = -1; // next Load() will try again
1751 }
1752
1753 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( const wxWindowDC& dc)
1754 {
1755     ENSURE_LOADED_OR_RETURN(NULL);
1756     wxMSWDCImpl *msw = wxDynamicCast( dc.GetImpl() , wxMSWDCImpl );
1757     wxSize sz = dc.GetSize();
1758     return new wxGDIPlusContext(this,(HDC) msw->GetHDC(), sz.x, sz.y);
1759 }
1760
1761 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( const wxPrinterDC& dc)
1762 {
1763     ENSURE_LOADED_OR_RETURN(NULL);
1764     wxMSWDCImpl *msw = wxDynamicCast( dc.GetImpl() , wxMSWDCImpl );
1765     wxSize sz = dc.GetSize();
1766     return new wxGDIPlusContext(this,(HDC) msw->GetHDC(), sz.x, sz.y);
1767 }
1768
1769 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( const wxEnhMetaFileDC& dc)
1770 {
1771     ENSURE_LOADED_OR_RETURN(NULL);
1772     wxMSWDCImpl *msw = wxDynamicCast( dc.GetImpl() , wxMSWDCImpl );
1773     wxSize sz = dc.GetSize();
1774     return new wxGDIPlusContext(this,(HDC) msw->GetHDC(), sz.x, sz.y);
1775 }
1776
1777 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( const wxMemoryDC& dc)
1778 {
1779     ENSURE_LOADED_OR_RETURN(NULL);
1780     wxMSWDCImpl *msw = wxDynamicCast( dc.GetImpl() , wxMSWDCImpl );
1781     wxSize sz = dc.GetSize();
1782     return new wxGDIPlusContext(this,(HDC) msw->GetHDC(), sz.x, sz.y);
1783 }
1784
1785 wxGraphicsContext * wxGDIPlusRenderer::CreateMeasuringContext()
1786 {
1787     ENSURE_LOADED_OR_RETURN(NULL);
1788     return new wxGDIPlusMeasuringContext(this);
1789 }
1790
1791 wxGraphicsContext * wxGDIPlusRenderer::CreateContextFromNativeContext( void * context )
1792 {
1793     ENSURE_LOADED_OR_RETURN(NULL);
1794     return new wxGDIPlusContext(this,(Graphics*) context);
1795 }
1796
1797
1798 wxGraphicsContext * wxGDIPlusRenderer::CreateContextFromNativeWindow( void * window )
1799 {
1800     ENSURE_LOADED_OR_RETURN(NULL);
1801     return new wxGDIPlusContext(this,(HWND) window);
1802 }
1803
1804 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( wxWindow* window )
1805 {
1806     ENSURE_LOADED_OR_RETURN(NULL);
1807     return new wxGDIPlusContext(this, (HWND) window->GetHWND() );
1808 }
1809
1810 // Path
1811
1812 wxGraphicsPath wxGDIPlusRenderer::CreatePath()
1813 {
1814     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPath);
1815     wxGraphicsPath m;
1816     m.SetRefData( new wxGDIPlusPathData(this));
1817     return m;
1818 }
1819
1820
1821 // Matrix
1822
1823 wxGraphicsMatrix wxGDIPlusRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1824                                                            wxDouble tx, wxDouble ty)
1825
1826 {
1827     ENSURE_LOADED_OR_RETURN(wxNullGraphicsMatrix);
1828     wxGraphicsMatrix m;
1829     wxGDIPlusMatrixData* data = new wxGDIPlusMatrixData( this );
1830     data->Set( a,b,c,d,tx,ty ) ;
1831     m.SetRefData(data);
1832     return m;
1833 }
1834
1835 wxGraphicsPen wxGDIPlusRenderer::CreatePen(const wxPen& pen)
1836 {
1837     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPen);
1838     if ( !pen.Ok() || pen.GetStyle() == wxTRANSPARENT )
1839         return wxNullGraphicsPen;
1840     else
1841     {
1842         wxGraphicsPen p;
1843         p.SetRefData(new wxGDIPlusPenData( this, pen ));
1844         return p;
1845     }
1846 }
1847
1848 wxGraphicsBrush wxGDIPlusRenderer::CreateBrush(const wxBrush& brush )
1849 {
1850     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
1851     if ( !brush.Ok() || brush.GetStyle() == wxTRANSPARENT )
1852         return wxNullGraphicsBrush;
1853     else
1854     {
1855         wxGraphicsBrush p;
1856         p.SetRefData(new wxGDIPlusBrushData( this, brush ));
1857         return p;
1858     }
1859 }
1860
1861 wxGraphicsBrush
1862 wxGDIPlusRenderer::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
1863                                              wxDouble x2, wxDouble y2,
1864                                              const wxGraphicsGradientStops& stops)
1865 {
1866     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
1867     wxGraphicsBrush p;
1868     wxGDIPlusBrushData* d = new wxGDIPlusBrushData( this );
1869     d->CreateLinearGradientBrush(x1, y1, x2, y2, stops);
1870     p.SetRefData(d);
1871     return p;
1872  }
1873
1874 wxGraphicsBrush
1875 wxGDIPlusRenderer::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
1876                                              wxDouble xc, wxDouble yc,
1877                                              wxDouble radius,
1878                                              const wxGraphicsGradientStops& stops)
1879 {
1880     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
1881     wxGraphicsBrush p;
1882     wxGDIPlusBrushData* d = new wxGDIPlusBrushData( this );
1883     d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,stops);
1884     p.SetRefData(d);
1885     return p;
1886 }
1887
1888 // sets the font
1889 wxGraphicsFont wxGDIPlusRenderer::CreateFont( const wxFont &font , const wxColour &col )
1890 {
1891     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
1892     if ( font.Ok() )
1893     {
1894         wxGraphicsFont p;
1895         p.SetRefData(new wxGDIPlusFontData( this , font, col ));
1896         return p;
1897     }
1898     else
1899         return wxNullGraphicsFont;
1900 }
1901
1902 wxGraphicsBitmap wxGDIPlusRenderer::CreateBitmap( const wxBitmap &bitmap )
1903 {
1904     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
1905     if ( bitmap.Ok() )
1906     {
1907         wxGraphicsBitmap p;
1908         p.SetRefData(new wxGDIPlusBitmapData( this , bitmap ));
1909         return p;
1910     }
1911     else
1912         return wxNullGraphicsBitmap;
1913 }
1914
1915 wxGraphicsBitmap wxGDIPlusRenderer::CreateBitmapFromNativeBitmap( void *bitmap )
1916 {
1917     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
1918     if ( bitmap != NULL )
1919     {
1920         wxGraphicsBitmap p;
1921         p.SetRefData(new wxGDIPlusBitmapData( this , (Bitmap*) bitmap ));
1922         return p;
1923     }
1924     else
1925         return wxNullGraphicsBitmap;
1926 }
1927
1928 wxGraphicsBitmap wxGDIPlusRenderer::CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  )
1929 {
1930     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
1931     Bitmap* image = static_cast<wxGDIPlusBitmapData*>(bitmap.GetRefData())->GetGDIPlusBitmap();
1932     if ( image )
1933     {
1934         wxGraphicsBitmap p;
1935         p.SetRefData(new wxGDIPlusBitmapData( this , image->Clone( (REAL) x , (REAL) y , (REAL) w , (REAL) h , PixelFormat32bppPARGB) ));
1936         return p;
1937     }
1938     else
1939         return wxNullGraphicsBitmap;
1940 }
1941
1942 // Shutdown GDI+ at app exit, before possible dll unload
1943 class wxGDIPlusRendererModule : public wxModule
1944 {
1945 public:
1946     virtual bool OnInit() { return true; }
1947     virtual void OnExit() { gs_GDIPlusRenderer.Unload(); }
1948
1949 private:
1950     DECLARE_DYNAMIC_CLASS(wxGDIPlusRendererModule)
1951 };
1952
1953 IMPLEMENT_DYNAMIC_CLASS(wxGDIPlusRendererModule, wxModule)
1954
1955 // ----------------------------------------------------------------------------
1956 // wxMSW-specific parts of wxGCDC
1957 // ----------------------------------------------------------------------------
1958
1959 WXHDC wxGCDC::AcquireHDC()
1960 {
1961     wxGraphicsContext * const gc = GetGraphicsContext();
1962     if ( !gc )
1963         return NULL;
1964
1965     Graphics * const g = static_cast<Graphics *>(gc->GetNativeContext());
1966     return g ? g->GetHDC() : NULL;
1967 }
1968
1969 void wxGCDC::ReleaseHDC(WXHDC hdc)
1970 {
1971     if ( !hdc )
1972         return;
1973
1974     wxGraphicsContext * const gc = GetGraphicsContext();
1975     wxCHECK_RET( gc, "can't release HDC because there is no wxGraphicsContext" );
1976
1977     Graphics * const g = static_cast<Graphics *>(gc->GetNativeContext());
1978     wxCHECK_RET( g, "can't release HDC because there is no Graphics" );
1979
1980     g->ReleaseHDC((HDC)hdc);
1981 }
1982
1983 #endif  // wxUSE_GRAPHICS_CONTEXT