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