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/dc.h"
  27     #include "wx/utils.h"
  28     #include "wx/dialog.h"
  29     #include "wx/app.h"
  30     #include "wx/bitmap.h"
  31     #include "wx/dcmemory.h"
  32     #include "wx/log.h"
  33     #include "wx/icon.h"
  34     #include "wx/dcprint.h"
  35     #include "wx/module.h"
  36 #endif
  37
  38 #include "wx/graphics.h"
  39 #include "wx/msw/wrapgdip.h"
  40
  41 #include "wx/stack.h"
  42
  43 WX_DECLARE_STACK(GraphicsState, GraphicsStates);
  44
  45 //-----------------------------------------------------------------------------
  46 // constants
  47 //-----------------------------------------------------------------------------
  48
  49 const double RAD2DEG = 180.0 / M_PI;
  50
  51 //-----------------------------------------------------------------------------
  52 // Local functions
  53 //-----------------------------------------------------------------------------
  54
  55 static inline double dmin(double a, double b) { return a < b ? a : b; }
  56 static inline double dmax(double a, double b) { return a > b ? a : b; }
  57
  58 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
  59 static inline double RadToDeg(double deg) { return (deg * 180.0) / M_PI; }
  60
  61 //-----------------------------------------------------------------------------
  62 // device context implementation
  63 //
  64 // more and more of the dc functionality should be implemented by calling
  65 // the appropricate wxGDIPlusContext, but we will have to do that step by step
  66 // also coordinate conversions should be moved to native matrix ops
  67 //-----------------------------------------------------------------------------
  68
  69 // we always stock two context states, one at entry, to be able to preserve the
  70 // state we were called with, the other one after changing to HI Graphics orientation
  71 // (this one is used for getting back clippings etc)
  72
  73 //-----------------------------------------------------------------------------
  74 // wxGraphicsPath implementation
  75 //-----------------------------------------------------------------------------
  76
  77 #include "wx/msw/private.h" // needs to be before #include <commdlg.h>
  78
  79 #if wxUSE_COMMON_DIALOGS && !defined(__WXMICROWIN__)
  80 #include <commdlg.h>
  81 #endif
  82
  83 class wxGDIPlusPathData : public wxGraphicsPathData
  84 {
  85 public :
  86     wxGDIPlusPathData(wxGraphicsRenderer* renderer, GraphicsPath* path = NULL);
  87     ~wxGDIPlusPathData();
  88
  89     virtual wxGraphicsObjectRefData *Clone() const;
  90
  91     //
  92     // These are the path primitives from which everything else can be constructed
  93     //
  94
  95     // begins a new subpath at (x,y)
  96     virtual void MoveToPoint( wxDouble x, wxDouble y );
  97
  98     // adds a straight line from the current point to (x,y)
  99     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 100
 101     // adds a cubic Bezier curve from the current point, using two control points and an end point
 102     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 103
 104
 105     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 106     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 107
 108     // gets the last point of the current path, (0,0) if not yet set
 109     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 110
 111     // adds another path
 112     virtual void AddPath( const wxGraphicsPathData* path );
 113
 114     // closes the current sub-path
 115     virtual void CloseSubpath();
 116
 117     //
 118     // These are convenience functions which - if not available natively will be assembled
 119     // using the primitives from above
 120     //
 121
 122     // appends a rectangle as a new closed subpath
 123     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 124     /*
 125
 126     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 127     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 128
 129     // 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)
 130     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 131 */
 132
 133     // returns the native path
 134     virtual void * GetNativePath() const { return m_path; }
 135
 136     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 137     virtual void UnGetNativePath(void * WXUNUSED(path)) const {}
 138
 139     // transforms each point of this path by the matrix
 140     virtual void Transform( const wxGraphicsMatrixData* matrix ) ;
 141
 142     // gets the bounding box enclosing all points (possibly including control points)
 143     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
 144
 145     virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxODDEVEN_RULE) const;
 146
 147 private :
 148     GraphicsPath* m_path;
 149 };
 150
 151 class wxGDIPlusMatrixData : public wxGraphicsMatrixData
 152 {
 153 public :
 154     wxGDIPlusMatrixData(wxGraphicsRenderer* renderer, Matrix* matrix = NULL) ;
 155     virtual ~wxGDIPlusMatrixData() ;
 156
 157     virtual wxGraphicsObjectRefData* Clone() const ;
 158
 159     // concatenates the matrix
 160     virtual void Concat( const wxGraphicsMatrixData *t );
 161
 162     // sets the matrix to the respective values
 163     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 164         wxDouble tx=0.0, wxDouble ty=0.0);
 165
 166     // gets the component valuess of the matrix
 167     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
 168                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
 169
 170     // makes this the inverse matrix
 171     virtual void Invert();
 172
 173     // returns true if the elements of the transformation matrix are equal ?
 174     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
 175
 176     // return true if this is the identity matrix
 177     virtual bool IsIdentity() const;
 178
 179     //
 180     // transformation
 181     //
 182
 183     // add the translation to this matrix
 184     virtual void Translate( wxDouble dx , wxDouble dy );
 185
 186     // add the scale to this matrix
 187     virtual void Scale( wxDouble xScale , wxDouble yScale );
 188
 189     // add the rotation to this matrix (radians)
 190     virtual void Rotate( wxDouble angle );
 191
 192     //
 193     // apply the transforms
 194     //
 195
 196     // applies that matrix to the point
 197     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 198
 199     // applies the matrix except for translations
 200     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 201
 202     // returns the native representation
 203     virtual void * GetNativeMatrix() const;
 204 private:
 205     Matrix* m_matrix ;
 206 } ;
 207
 208 class wxGDIPlusPenData : public wxGraphicsObjectRefData
 209 {
 210 public:
 211     wxGDIPlusPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 212     ~wxGDIPlusPenData();
 213
 214     void Init();
 215
 216     virtual wxDouble GetWidth() { return m_width; }
 217     virtual Pen* GetGDIPlusPen() { return m_pen; }
 218
 219 protected :
 220     Pen* m_pen;
 221     Image* m_penImage;
 222     Brush* m_penBrush;
 223
 224     wxDouble m_width;
 225 };
 226
 227 class wxGDIPlusBrushData : public wxGraphicsObjectRefData
 228 {
 229 public:
 230     wxGDIPlusBrushData( wxGraphicsRenderer* renderer );
 231     wxGDIPlusBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 232     ~wxGDIPlusBrushData ();
 233
 234     void CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 235         const wxColour&c1, const wxColour&c2 );
 236     void CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 237         const wxColour &oColor, const wxColour &cColor );
 238     virtual Brush* GetGDIPlusBrush() { return m_brush; }
 239
 240 protected:
 241     virtual void Init();
 242
 243 private :
 244     Brush* m_brush;
 245     Image* m_brushImage;
 246     GraphicsPath* m_brushPath;
 247 };
 248
 249 class wxGDIPlusFontData : public wxGraphicsObjectRefData
 250 {
 251 public:
 252     wxGDIPlusFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col );
 253     ~wxGDIPlusFontData();
 254
 255     virtual Brush* GetGDIPlusBrush() { return m_textBrush; }
 256     virtual Font* GetGDIPlusFont() { return m_font; }
 257 private :
 258     Brush* m_textBrush;
 259     Font* m_font;
 260 };
 261
 262 class wxGDIPlusContext : public wxGraphicsContext
 263 {
 264 public:
 265     wxGDIPlusContext( wxGraphicsRenderer* renderer, HDC hdc );
 266     wxGDIPlusContext( wxGraphicsRenderer* renderer, HWND hwnd );
 267     wxGDIPlusContext( wxGraphicsRenderer* renderer, Graphics* gr);
 268     wxGDIPlusContext();
 269
 270     virtual ~wxGDIPlusContext();
 271
 272     virtual void Clip( const wxRegion &region );
 273     // clips drawings to the rect
 274     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 275
 276     // resets the clipping to original extent
 277     virtual void ResetClip();
 278
 279     virtual void * GetNativeContext();
 280
 281     virtual void StrokePath( const wxGraphicsPath& p );
 282     virtual void FillPath( const wxGraphicsPath& p , int fillStyle = wxODDEVEN_RULE );
 283
 284         // stroke lines connecting each of the points
 285     virtual void StrokeLines( size_t n, const wxPoint2DDouble *points);
 286
 287     // draws a polygon
 288     virtual void DrawLines( size_t n, const wxPoint2DDouble *points, int fillStyle = wxODDEVEN_RULE );
 289
 290     virtual void Translate( wxDouble dx , wxDouble dy );
 291     virtual void Scale( wxDouble xScale , wxDouble yScale );
 292     virtual void Rotate( wxDouble angle );
 293
 294     // concatenates this transform with the current transform of this context
 295     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 296
 297     // sets the transform of this context
 298     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 299
 300     // gets the matrix of this context
 301     virtual wxGraphicsMatrix GetTransform() const;
 302
 303     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 304     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 305     virtual void PushState();
 306     virtual void PopState();
 307
 308     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y);
 309     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 310         wxDouble *descent, wxDouble *externalLeading ) const;
 311     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 312     virtual bool ShouldOffset() const;
 313
 314 private:
 315     void    Init();
 316     void    SetDefaults();
 317
 318     Graphics* m_context;
 319     GraphicsStates m_stateStack;
 320     GraphicsState m_state1;
 321     GraphicsState m_state2;
 322
 323     DECLARE_DYNAMIC_CLASS_NO_COPY(wxGDIPlusContext)
 324 };
 325
 326 class WXDLLIMPEXP_CORE wxGDIPlusMeasuringContext : public wxGDIPlusContext
 327 {
 328 public:
 329     wxGDIPlusMeasuringContext( wxGraphicsRenderer* renderer ) : wxGDIPlusContext( renderer , m_hdc = GetDC(NULL) )
 330     {
 331     }
 332     wxGDIPlusMeasuringContext()
 333     {
 334     }
 335
 336     virtual ~wxGDIPlusMeasuringContext()
 337     {
 338         ReleaseDC( NULL, m_hdc );
 339     }
 340
 341 private:
 342     HDC m_hdc ;
 343     DECLARE_DYNAMIC_CLASS_NO_COPY(wxGDIPlusMeasuringContext)
 344 } ;
 345
 346 //-----------------------------------------------------------------------------
 347 // wxGDIPlusPen implementation
 348 //-----------------------------------------------------------------------------
 349
 350 wxGDIPlusPenData::~wxGDIPlusPenData()
 351 {
 352     delete m_pen;
 353     delete m_penImage;
 354     delete m_penBrush;
 355 }
 356
 357 void wxGDIPlusPenData::Init()
 358 {
 359     m_pen = NULL ;
 360     m_penImage = NULL;
 361     m_penBrush = NULL;
 362 }
 363
 364 wxGDIPlusPenData::wxGDIPlusPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 365 : wxGraphicsObjectRefData(renderer)
 366 {
 367     Init();
 368     m_width = pen.GetWidth();
 369     if (m_width <= 0.0)
 370         m_width = 0.1;
 371
 372     m_pen = new Pen(Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 373         pen.GetColour().Green() , pen.GetColour().Blue() ), m_width );
 374
 375     LineCap cap;
 376     switch ( pen.GetCap() )
 377     {
 378     case wxCAP_ROUND :
 379         cap = LineCapRound;
 380         break;
 381
 382     case wxCAP_PROJECTING :
 383         cap = LineCapSquare;
 384         break;
 385
 386     case wxCAP_BUTT :
 387         cap = LineCapFlat; // TODO verify
 388         break;
 389
 390     default :
 391         cap = LineCapFlat;
 392         break;
 393     }
 394     m_pen->SetLineCap(cap,cap, DashCapFlat);
 395
 396     LineJoin join;
 397     switch ( pen.GetJoin() )
 398     {
 399     case wxJOIN_BEVEL :
 400         join = LineJoinBevel;
 401         break;
 402
 403     case wxJOIN_MITER :
 404         join = LineJoinMiter;
 405         break;
 406
 407     case wxJOIN_ROUND :
 408         join = LineJoinRound;
 409         break;
 410
 411     default :
 412         join = LineJoinMiter;
 413         break;
 414     }
 415
 416     m_pen->SetLineJoin(join);
 417
 418     m_pen->SetDashStyle(DashStyleSolid);
 419
 420     DashStyle dashStyle = DashStyleSolid;
 421     switch ( pen.GetStyle() )
 422     {
 423     case wxSOLID :
 424         break;
 425
 426     case wxDOT :
 427         dashStyle = DashStyleDot;
 428         break;
 429
 430     case wxLONG_DASH :
 431         dashStyle = DashStyleDash; // TODO verify
 432         break;
 433
 434     case wxSHORT_DASH :
 435         dashStyle = DashStyleDash;
 436         break;
 437
 438     case wxDOT_DASH :
 439         dashStyle = DashStyleDashDot;
 440         break;
 441     case wxUSER_DASH :
 442         {
 443             dashStyle = DashStyleCustom;
 444             wxDash *dashes;
 445             int count = pen.GetDashes( &dashes );
 446             if ((dashes != NULL) && (count > 0))
 447             {
 448                 REAL *userLengths = new REAL[count];
 449                 for ( int i = 0; i < count; ++i )
 450                 {
 451                     userLengths[i] = dashes[i];
 452                 }
 453                 m_pen->SetDashPattern( userLengths, count);
 454                 delete[] userLengths;
 455             }
 456         }
 457         break;
 458     case wxSTIPPLE :
 459         {
 460             wxBitmap* bmp = pen.GetStipple();
 461             if ( bmp && bmp->Ok() )
 462             {
 463                 m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 464                 m_penBrush = new TextureBrush(m_penImage);
 465                 m_pen->SetBrush( m_penBrush );
 466             }
 467
 468         }
 469         break;
 470     default :
 471         if ( pen.GetStyle() >= wxFIRST_HATCH && pen.GetStyle() <= wxLAST_HATCH )
 472         {
 473             HatchStyle style = HatchStyleHorizontal;
 474             switch( pen.GetStyle() )
 475             {
 476             case wxBDIAGONAL_HATCH :
 477                 style = HatchStyleBackwardDiagonal;
 478                 break ;
 479             case wxCROSSDIAG_HATCH :
 480                 style = HatchStyleDiagonalCross;
 481                 break ;
 482             case wxFDIAGONAL_HATCH :
 483                 style = HatchStyleForwardDiagonal;
 484                 break ;
 485             case wxCROSS_HATCH :
 486                 style = HatchStyleCross;
 487                 break ;
 488             case wxHORIZONTAL_HATCH :
 489                 style = HatchStyleHorizontal;
 490                 break ;
 491             case wxVERTICAL_HATCH :
 492                 style = HatchStyleVertical;
 493                 break ;
 494
 495             }
 496             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 497                 pen.GetColour().Green() , pen.GetColour().Blue() ), Color::Transparent );
 498             m_pen->SetBrush( m_penBrush );
 499         }
 500         break;
 501     }
 502     if ( dashStyle != DashStyleSolid )
 503         m_pen->SetDashStyle(dashStyle);
 504 }
 505
 506 //-----------------------------------------------------------------------------
 507 // wxGDIPlusBrush implementation
 508 //-----------------------------------------------------------------------------
 509
 510 wxGDIPlusBrushData::wxGDIPlusBrushData( wxGraphicsRenderer* renderer )
 511 : wxGraphicsObjectRefData(renderer)
 512 {
 513     Init();
 514 }
 515
 516 wxGDIPlusBrushData::wxGDIPlusBrushData( wxGraphicsRenderer* renderer , const wxBrush &brush )
 517 : wxGraphicsObjectRefData(renderer)
 518 {
 519     Init();
 520     if ( brush.GetStyle() == wxSOLID)
 521     {
 522         m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 523             brush.GetColour().Green() , brush.GetColour().Blue() ) );
 524     }
 525     else if ( brush.IsHatch() )
 526     {
 527         HatchStyle style = HatchStyleHorizontal;
 528         switch( brush.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_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 551             brush.GetColour().Green() , brush.GetColour().Blue() ), Color::Transparent );
 552     }
 553     else
 554     {
 555         wxBitmap* bmp = brush.GetStipple();
 556         if ( bmp && bmp->Ok() )
 557         {
 558             wxDELETE( m_brushImage );
 559             m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 560             m_brush = new TextureBrush(m_brushImage);
 561         }
 562     }
 563 }
 564
 565 wxGDIPlusBrushData::~wxGDIPlusBrushData()
 566 {
 567     delete m_brush;
 568     delete m_brushImage;
 569     delete m_brushPath;
 570 };
 571
 572 void wxGDIPlusBrushData::Init()
 573 {
 574     m_brush = NULL;
 575     m_brushImage= NULL;
 576     m_brushPath= NULL;
 577 }
 578
 579 void wxGDIPlusBrushData::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2)
 580 {
 581     m_brush = new LinearGradientBrush( PointF( x1,y1) , PointF( x2,y2),
 582         Color( c1.Alpha(), c1.Red(),c1.Green() , c1.Blue() ),
 583         Color( c2.Alpha(), c2.Red(),c2.Green() , c2.Blue() ));
 584 }
 585
 586 void wxGDIPlusBrushData::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 587                                                const wxColour &oColor, const wxColour &cColor)
 588 {
 589     // Create a path that consists of a single circle.
 590     m_brushPath = new GraphicsPath();
 591     m_brushPath->AddEllipse( (REAL)(xc-radius), (REAL)(yc-radius), (REAL)(2*radius), (REAL)(2*radius));
 592
 593     PathGradientBrush *b = new PathGradientBrush(m_brushPath);
 594     m_brush = b;
 595     b->SetCenterPoint( PointF(xo,yo));
 596     b->SetCenterColor(Color( oColor.Alpha(), oColor.Red(),oColor.Green() , oColor.Blue() ));
 597
 598     Color colors[] = {Color( cColor.Alpha(), cColor.Red(),cColor.Green() , cColor.Blue() )};
 599     int count = 1;
 600     b->SetSurroundColors(colors, &count);
 601 }
 602
 603 //-----------------------------------------------------------------------------
 604 // wxGDIPlusFont implementation
 605 //-----------------------------------------------------------------------------
 606
 607 wxGDIPlusFontData::wxGDIPlusFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 608                              const wxColour& col ) : wxGraphicsObjectRefData( renderer )
 609 {
 610     m_textBrush = NULL;
 611     m_font = NULL;
 612
 613     wxWCharBuffer s = font.GetFaceName().wc_str( *wxConvUI );
 614     int size = font.GetPointSize();
 615     int style = FontStyleRegular;
 616     if ( font.GetStyle() == wxFONTSTYLE_ITALIC )
 617         style |= FontStyleItalic;
 618     if ( font.GetUnderlined() )
 619         style |= FontStyleUnderline;
 620     if ( font.GetWeight() == wxFONTWEIGHT_BOLD )
 621         style |= FontStyleBold;
 622     m_font = new Font( s , size , style );
 623     m_textBrush = new SolidBrush( Color( col.Alpha() , col.Red() ,
 624         col.Green() , col.Blue() ));
 625 }
 626
 627 wxGDIPlusFontData::~wxGDIPlusFontData()
 628 {
 629     delete m_textBrush;
 630     delete m_font;
 631 }
 632
 633 //-----------------------------------------------------------------------------
 634 // wxGDIPlusPath implementation
 635 //-----------------------------------------------------------------------------
 636
 637 wxGDIPlusPathData::wxGDIPlusPathData(wxGraphicsRenderer* renderer, GraphicsPath* path ) : wxGraphicsPathData(renderer)
 638 {
 639     if ( path )
 640         m_path = path;
 641     else
 642         m_path = new GraphicsPath();
 643 }
 644
 645 wxGDIPlusPathData::~wxGDIPlusPathData()
 646 {
 647     delete m_path;
 648 }
 649
 650 wxGraphicsObjectRefData* wxGDIPlusPathData::Clone() const
 651 {
 652     return new wxGDIPlusPathData( GetRenderer() , m_path->Clone());
 653 }
 654
 655 //
 656 // The Primitives
 657 //
 658
 659 void wxGDIPlusPathData::MoveToPoint( wxDouble x , wxDouble y )
 660 {
 661     m_path->StartFigure();
 662     m_path->AddLine((REAL) x,(REAL) y,(REAL) x,(REAL) y);
 663 }
 664
 665 void wxGDIPlusPathData::AddLineToPoint( wxDouble x , wxDouble y )
 666 {
 667     m_path->AddLine((REAL) x,(REAL) y,(REAL) x,(REAL) y);
 668 }
 669
 670 void wxGDIPlusPathData::CloseSubpath()
 671 {
 672     m_path->CloseFigure();
 673 }
 674
 675 void wxGDIPlusPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 676 {
 677     PointF c1(cx1,cy1);
 678     PointF c2(cx2,cy2);
 679     PointF end(x,y);
 680     PointF start;
 681     m_path->GetLastPoint(&start);
 682     m_path->AddBezier(start,c1,c2,end);
 683 }
 684
 685 // gets the last point of the current path, (0,0) if not yet set
 686 void wxGDIPlusPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
 687 {
 688     PointF start;
 689     m_path->GetLastPoint(&start);
 690     *x = start.X ;
 691     *y = start.Y ;
 692 }
 693
 694 void wxGDIPlusPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 695 {
 696     double sweepAngle = endAngle - startAngle ;
 697     if( fabs(sweepAngle) >= 2*M_PI)
 698     {
 699         sweepAngle = 2 * M_PI;
 700     }
 701     else
 702     {
 703         if ( clockwise )
 704         {
 705             if( sweepAngle < 0 )
 706                 sweepAngle += 2 * M_PI;
 707         }
 708         else
 709         {
 710             if( sweepAngle > 0 )
 711                 sweepAngle -= 2 * M_PI;
 712
 713         }
 714    }
 715    m_path->AddArc((REAL) (x-r),(REAL) (y-r),(REAL) (2*r),(REAL) (2*r),RadToDeg(startAngle),RadToDeg(sweepAngle));
 716 }
 717
 718 void wxGDIPlusPathData::AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 719 {
 720     m_path->AddRectangle(RectF(x,y,w,h));
 721 }
 722
 723 void wxGDIPlusPathData::AddPath( const wxGraphicsPathData* path )
 724 {
 725     m_path->AddPath( (GraphicsPath*) path->GetNativePath(), FALSE);
 726 }
 727
 728
 729 // transforms each point of this path by the matrix
 730 void wxGDIPlusPathData::Transform( const wxGraphicsMatrixData* matrix )
 731 {
 732     m_path->Transform( (Matrix*) matrix->GetNativeMatrix() );
 733 }
 734
 735 // gets the bounding box enclosing all points (possibly including control points)
 736 void wxGDIPlusPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
 737 {
 738     RectF bounds;
 739     m_path->GetBounds( &bounds, NULL, NULL) ;
 740     *x = bounds.X;
 741     *y = bounds.Y;
 742     *w = bounds.Width;
 743     *h = bounds.Height;
 744 }
 745
 746 bool wxGDIPlusPathData::Contains( wxDouble x, wxDouble y, int fillStyle ) const
 747 {
 748     m_path->SetFillMode( fillStyle == wxODDEVEN_RULE ? FillModeAlternate : FillModeWinding);
 749     return m_path->IsVisible( (FLOAT) x,(FLOAT) y) == TRUE ;
 750 }
 751
 752 //-----------------------------------------------------------------------------
 753 // wxGDIPlusMatrixData implementation
 754 //-----------------------------------------------------------------------------
 755
 756 wxGDIPlusMatrixData::wxGDIPlusMatrixData(wxGraphicsRenderer* renderer, Matrix* matrix )
 757     : wxGraphicsMatrixData(renderer)
 758 {
 759     if ( matrix )
 760         m_matrix = matrix ;
 761     else
 762         m_matrix = new Matrix();
 763 }
 764
 765 wxGDIPlusMatrixData::~wxGDIPlusMatrixData()
 766 {
 767     delete m_matrix;
 768 }
 769
 770 wxGraphicsObjectRefData *wxGDIPlusMatrixData::Clone() const
 771 {
 772     return new wxGDIPlusMatrixData( GetRenderer(), m_matrix->Clone());
 773 }
 774
 775 // concatenates the matrix
 776 void wxGDIPlusMatrixData::Concat( const wxGraphicsMatrixData *t )
 777 {
 778     m_matrix->Multiply( (Matrix*) t->GetNativeMatrix());
 779 }
 780
 781 // sets the matrix to the respective values
 782 void wxGDIPlusMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
 783                  wxDouble tx, wxDouble ty)
 784 {
 785     m_matrix->SetElements(a,b,c,d,tx,ty);
 786 }
 787
 788 // gets the component valuess of the matrix
 789 void wxGDIPlusMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
 790                               wxDouble* d, wxDouble* tx, wxDouble* ty) const
 791 {
 792     REAL elements[6];
 793     m_matrix->GetElements(elements);
 794     if (a)  *a = elements[0];
 795     if (b)  *b = elements[1];
 796     if (c)  *c = elements[2];
 797     if (d)  *d = elements[3];
 798     if (tx) *tx= elements[4];
 799     if (ty) *ty= elements[5];
 800 }
 801
 802 // makes this the inverse matrix
 803 void wxGDIPlusMatrixData::Invert()
 804 {
 805     m_matrix->Invert();
 806 }
 807
 808 // returns true if the elements of the transformation matrix are equal ?
 809 bool wxGDIPlusMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
 810 {
 811     return m_matrix->Equals((Matrix*) t->GetNativeMatrix())== TRUE ;
 812 }
 813
 814 // return true if this is the identity matrix
 815 bool wxGDIPlusMatrixData::IsIdentity() const
 816 {
 817     return m_matrix->IsIdentity() == TRUE ;
 818 }
 819
 820 //
 821 // transformation
 822 //
 823
 824 // add the translation to this matrix
 825 void wxGDIPlusMatrixData::Translate( wxDouble dx , wxDouble dy )
 826 {
 827     m_matrix->Translate(dx,dy);
 828 }
 829
 830 // add the scale to this matrix
 831 void wxGDIPlusMatrixData::Scale( wxDouble xScale , wxDouble yScale )
 832 {
 833     m_matrix->Scale(xScale,yScale);
 834 }
 835
 836 // add the rotation to this matrix (radians)
 837 void wxGDIPlusMatrixData::Rotate( wxDouble angle )
 838 {
 839     m_matrix->Rotate( angle );
 840 }
 841
 842 //
 843 // apply the transforms
 844 //
 845
 846 // applies that matrix to the point
 847 void wxGDIPlusMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
 848 {
 849     PointF pt(*x,*y);
 850     m_matrix->TransformPoints(&pt);
 851     *x = pt.X;
 852     *y = pt.Y;
 853 }
 854
 855 // applies the matrix except for translations
 856 void wxGDIPlusMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
 857 {
 858     PointF pt(*dx,*dy);
 859     m_matrix->TransformVectors(&pt);
 860     *dx = pt.X;
 861     *dy = pt.Y;
 862 }
 863
 864 // returns the native representation
 865 void * wxGDIPlusMatrixData::GetNativeMatrix() const
 866 {
 867     return m_matrix;
 868 }
 869
 870 //-----------------------------------------------------------------------------
 871 // wxGDIPlusContext implementation
 872 //-----------------------------------------------------------------------------
 873
 874 IMPLEMENT_DYNAMIC_CLASS(wxGDIPlusContext,wxGraphicsContext)
 875 IMPLEMENT_DYNAMIC_CLASS(wxGDIPlusMeasuringContext,wxGDIPlusContext)
 876
 877 class wxGDIPlusOffsetHelper
 878 {
 879 public :
 880     wxGDIPlusOffsetHelper( Graphics* gr , bool offset )
 881     {
 882         m_gr = gr;
 883         m_offset = offset;
 884         if ( m_offset )
 885             m_gr->TranslateTransform( 0.5, 0.5 );
 886     }
 887     ~wxGDIPlusOffsetHelper( )
 888     {
 889         if ( m_offset )
 890             m_gr->TranslateTransform( -0.5, -0.5 );
 891     }
 892 public :
 893     Graphics* m_gr;
 894     bool m_offset;
 895 } ;
 896
 897 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, HDC hdc  )
 898     : wxGraphicsContext(renderer)
 899 {
 900     Init();
 901     m_context = new Graphics( hdc);
 902     SetDefaults();
 903 }
 904
 905 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, HWND hwnd  )
 906     : wxGraphicsContext(renderer)
 907 {
 908     Init();
 909     m_context = new Graphics( hwnd);
 910     SetDefaults();
 911 }
 912
 913 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, Graphics* gr  )
 914     : wxGraphicsContext(renderer)
 915 {
 916     Init();
 917     m_context = gr;
 918     SetDefaults();
 919 }
 920
 921 wxGDIPlusContext::wxGDIPlusContext() : wxGraphicsContext(NULL)
 922 {
 923     Init();
 924 }
 925
 926 void wxGDIPlusContext::Init()
 927 {
 928     m_context = NULL;
 929     m_state1 = 0;
 930     m_state2= 0;
 931 }
 932
 933 void wxGDIPlusContext::SetDefaults()
 934 {
 935     m_context->SetTextRenderingHint(TextRenderingHintSystemDefault);
 936     m_context->SetPixelOffsetMode(PixelOffsetModeHalf);
 937     m_context->SetSmoothingMode(SmoothingModeHighQuality);
 938     m_state1 = m_context->Save();
 939     m_state2 = m_context->Save();
 940 }
 941
 942 wxGDIPlusContext::~wxGDIPlusContext()
 943 {
 944     if ( m_context )
 945     {
 946         m_context->Restore( m_state2 );
 947         m_context->Restore( m_state1 );
 948         delete m_context;
 949     }
 950 }
 951
 952
 953 void wxGDIPlusContext::Clip( const wxRegion &region )
 954 {
 955     Region rgn((HRGN)region.GetHRGN());
 956     m_context->SetClip(&rgn,CombineModeIntersect);
 957 }
 958
 959 void wxGDIPlusContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 960 {
 961     m_context->SetClip(RectF(x,y,w,h),CombineModeIntersect);
 962 }
 963
 964 void wxGDIPlusContext::ResetClip()
 965 {
 966     m_context->ResetClip();
 967 }
 968
 969 void wxGDIPlusContext::StrokeLines( size_t n, const wxPoint2DDouble *points)
 970 {
 971         if ( !m_pen.IsNull() )
 972         {
 973         wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
 974                 Point *cpoints = new Point[n];
 975                 for (size_t i = 0; i < n; i++)
 976                 {
 977                         cpoints[i].X = (int)(points[i].m_x );
 978                         cpoints[i].Y = (int)(points[i].m_y );
 979
 980                 } // for (size_t i = 0; i < n; i++)
 981                 m_context->DrawLines( ((wxGDIPlusPenData*)m_pen.GetGraphicsData())->GetGDIPlusPen() , cpoints , n ) ;
 982                 delete[] cpoints;
 983         }
 984 }
 985
 986 void wxGDIPlusContext::DrawLines( size_t n, const wxPoint2DDouble *points, int WXUNUSED(fillStyle) )
 987 {
 988     wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
 989         Point *cpoints = new Point[n];
 990         for (size_t i = 0; i < n; i++)
 991         {
 992                 cpoints[i].X = (int)(points[i].m_x );
 993                 cpoints[i].Y = (int)(points[i].m_y );
 994
 995         } // for (int i = 0; i < n; i++)
 996         if ( !m_brush.IsNull() )
 997                 m_context->FillPolygon( ((wxGDIPlusBrushData*)m_brush.GetRefData())->GetGDIPlusBrush() , cpoints , n ) ;
 998         if ( !m_pen.IsNull() )
 999                 m_context->DrawLines( ((wxGDIPlusPenData*)m_pen.GetGraphicsData())->GetGDIPlusPen() , cpoints , n ) ;
1000         delete[] cpoints;
1001 }
1002
1003 void wxGDIPlusContext::StrokePath( const wxGraphicsPath& path )
1004 {
1005     if ( !m_pen.IsNull() )
1006     {
1007         wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
1008         m_context->DrawPath( ((wxGDIPlusPenData*)m_pen.GetGraphicsData())->GetGDIPlusPen() , (GraphicsPath*) path.GetNativePath() );
1009     }
1010 }
1011
1012 void wxGDIPlusContext::FillPath( const wxGraphicsPath& path , int fillStyle )
1013 {
1014     if ( !m_brush.IsNull() )
1015     {
1016         wxGDIPlusOffsetHelper helper( m_context , ShouldOffset() );
1017         ((GraphicsPath*) path.GetNativePath())->SetFillMode( fillStyle == wxODDEVEN_RULE ? FillModeAlternate : FillModeWinding);
1018         m_context->FillPath( ((wxGDIPlusBrushData*)m_brush.GetRefData())->GetGDIPlusBrush() ,
1019             (GraphicsPath*) path.GetNativePath());
1020     }
1021 }
1022
1023 void wxGDIPlusContext::Rotate( wxDouble angle )
1024 {
1025     m_context->RotateTransform( RadToDeg(angle) );
1026 }
1027
1028 void wxGDIPlusContext::Translate( wxDouble dx , wxDouble dy )
1029 {
1030     m_context->TranslateTransform( dx , dy );
1031 }
1032
1033 void wxGDIPlusContext::Scale( wxDouble xScale , wxDouble yScale )
1034 {
1035     m_context->ScaleTransform(xScale,yScale);
1036 }
1037
1038 void wxGDIPlusContext::PushState()
1039 {
1040     GraphicsState state = m_context->Save();
1041     m_stateStack.push(state);
1042 }
1043
1044 void wxGDIPlusContext::PopState()
1045 {
1046     GraphicsState state = m_stateStack.top();
1047     m_stateStack.pop();
1048     m_context->Restore(state);
1049 }
1050
1051 // the built-in conversions functions create non-premultiplied bitmaps, while GDIPlus needs them in the
1052 // premultiplied format, therefore in the failing cases we create a new bitmap using the non-premultiplied
1053 // bytes as parameter
1054
1055 void wxGDIPlusContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1056 {
1057     Bitmap* image = NULL;
1058     Bitmap* helper = NULL;
1059     if ( bmp.GetMask() )
1060     {
1061         Bitmap interim((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE()) ;
1062
1063         size_t width = interim.GetWidth();
1064         size_t height = interim.GetHeight();
1065         Rect bounds(0,0,width,height);
1066
1067         image = new Bitmap(width,height,PixelFormat32bppPARGB) ;
1068
1069         Bitmap interimMask((HBITMAP)bmp.GetMask()->GetMaskBitmap(),NULL);
1070         wxASSERT(interimMask.GetPixelFormat() == PixelFormat1bppIndexed);
1071
1072         BitmapData dataMask ;
1073         interimMask.LockBits(&bounds,ImageLockModeRead,
1074             interimMask.GetPixelFormat(),&dataMask);
1075
1076
1077         BitmapData imageData ;
1078         image->LockBits(&bounds,ImageLockModeWrite, PixelFormat32bppPARGB, &imageData);
1079
1080         BYTE maskPattern = 0 ;
1081         BYTE maskByte = 0;
1082         size_t maskIndex ;
1083
1084         for ( size_t y = 0 ; y < height ; ++y)
1085         {
1086             maskIndex = 0 ;
1087             for( size_t x = 0 ; x < width; ++x)
1088             {
1089                 if ( x % 8 == 0)
1090                 {
1091                     maskPattern = 0x80;
1092                     maskByte = *((BYTE*)dataMask.Scan0 + dataMask.Stride*y + maskIndex);
1093                     maskIndex++;
1094                 }
1095                 else
1096                     maskPattern = maskPattern >> 1;
1097
1098                 ARGB *dest = (ARGB*)((BYTE*)imageData.Scan0 + imageData.Stride*y + x*4);
1099                 if ( (maskByte & maskPattern) == 0 )
1100                     *dest = 0x00000000;
1101                 else
1102                 {
1103                     Color c ;
1104                     interim.GetPixel(x,y,&c) ;
1105                     *dest = (c.GetValue() | Color::AlphaMask);
1106                 }
1107             }
1108         }
1109
1110         image->UnlockBits(&imageData);
1111
1112         interimMask.UnlockBits(&dataMask);
1113         interim.UnlockBits(&dataMask);
1114     }
1115     else
1116     {
1117         image = Bitmap::FromHBITMAP((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE());
1118         if ( bmp.HasAlpha() && GetPixelFormatSize(image->GetPixelFormat()) == 32 )
1119         {
1120             size_t width = image->GetWidth();
1121             size_t height = image->GetHeight();
1122             Rect bounds(0,0,width,height);
1123             BitmapData data ;
1124
1125             helper = image ;
1126             image = NULL ;
1127             helper->LockBits(&bounds, ImageLockModeRead,
1128                 helper->GetPixelFormat(),&data);
1129
1130             image = new Bitmap(data.Width, data.Height, data.Stride,
1131                 PixelFormat32bppPARGB , (BYTE*) data.Scan0);
1132
1133             helper->UnlockBits(&data);
1134         }
1135     }
1136     if ( image )
1137         m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
1138     delete image ;
1139     delete helper ;
1140 }
1141
1142 void wxGDIPlusContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1143 {
1144     // the built-in conversion fails when there is alpha in the HICON (eg XP style icons), we can only
1145     // find out by looking at the bitmap data whether there really was alpha in it
1146     HICON hIcon = (HICON)icon.GetHICON();
1147     ICONINFO iconInfo ;
1148     // IconInfo creates the bitmaps for color and mask, we must dispose of them after use
1149     if (!GetIconInfo(hIcon,&iconInfo))
1150         return;
1151
1152     Bitmap interim(iconInfo.hbmColor,NULL);
1153
1154     Bitmap* image = NULL ;
1155
1156     // if it's not 32 bit, it doesn't have an alpha channel, note that since the conversion doesn't
1157     // work correctly, asking IsAlphaPixelFormat at this point fails as well
1158     if( GetPixelFormatSize(interim.GetPixelFormat())!= 32 )
1159     {
1160         image = Bitmap::FromHICON(hIcon);
1161     }
1162     else
1163     {
1164         size_t width = interim.GetWidth();
1165         size_t height = interim.GetHeight();
1166         Rect bounds(0,0,width,height);
1167         BitmapData data ;
1168
1169         interim.LockBits(&bounds, ImageLockModeRead,
1170             interim.GetPixelFormat(),&data);
1171
1172         bool hasAlpha = false;
1173         for ( size_t y = 0 ; y < height && !hasAlpha ; ++y)
1174         {
1175             for( size_t x = 0 ; x < width && !hasAlpha; ++x)
1176             {
1177                 ARGB *dest = (ARGB*)((BYTE*)data.Scan0 + data.Stride*y + x*4);
1178                 if ( ( *dest & Color::AlphaMask ) != 0 )
1179                     hasAlpha = true;
1180             }
1181         }
1182
1183         if ( hasAlpha )
1184         {
1185         image = new Bitmap(data.Width, data.Height, data.Stride,
1186             PixelFormat32bppARGB , (BYTE*) data.Scan0);
1187         }
1188         else
1189         {
1190             image = Bitmap::FromHICON(hIcon);
1191         }
1192
1193         interim.UnlockBits(&data);
1194     }
1195
1196     m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
1197
1198     delete image ;
1199     DeleteObject(iconInfo.hbmColor);
1200     DeleteObject(iconInfo.hbmMask);
1201 }
1202
1203 void wxGDIPlusContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
1204 {
1205     if ( m_font.IsNull() || str.IsEmpty())
1206         return ;
1207
1208     wxWCharBuffer s = str.wc_str( *wxConvUI );
1209     m_context->DrawString( s , -1 , ((wxGDIPlusFontData*)m_font.GetRefData())->GetGDIPlusFont() ,
1210             PointF( x , y ) , StringFormat::GenericTypographic() , ((wxGDIPlusFontData*)m_font.GetRefData())->GetGDIPlusBrush() );
1211 }
1212
1213 void wxGDIPlusContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1214                                      wxDouble *descent, wxDouble *externalLeading ) const
1215 {
1216     wxWCharBuffer s = str.wc_str( *wxConvUI );
1217     FontFamily ffamily ;
1218     Font* f = ((wxGDIPlusFontData*)m_font.GetRefData())->GetGDIPlusFont();
1219
1220     f->GetFamily(&ffamily) ;
1221
1222     REAL factorY = m_context->GetDpiY() / 72.0 ;
1223
1224     REAL rDescent = ffamily.GetCellDescent(FontStyleRegular) *
1225         f->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
1226     REAL rAscent = ffamily.GetCellAscent(FontStyleRegular) *
1227         f->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
1228     REAL rHeight = ffamily.GetLineSpacing(FontStyleRegular) *
1229         f->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
1230
1231     if ( height )
1232         *height = rHeight * factorY;
1233     if ( descent )
1234         *descent = rDescent * factorY;
1235     if ( externalLeading )
1236         *externalLeading = (rHeight - rAscent - rDescent) * factorY;
1237     // measuring empty strings is not guaranteed, so do it by hand
1238     if ( str.IsEmpty())
1239     {
1240         if ( width )
1241             *width = 0 ;
1242     }
1243     else
1244     {
1245         RectF layoutRect(0,0, 100000.0f, 100000.0f);
1246         StringFormat strFormat( StringFormat::GenericTypographic() );
1247         strFormat.SetFormatFlags( StringFormatFlagsMeasureTrailingSpaces | strFormat.GetFormatFlags() );
1248
1249         RectF bounds ;
1250         m_context->MeasureString((const wchar_t *) s , wcslen(s) , f, layoutRect, &strFormat, &bounds ) ;
1251         if ( width )
1252             *width = bounds.Width;
1253     }
1254 }
1255
1256 void wxGDIPlusContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
1257 {
1258     widths.Empty();
1259     widths.Add(0, text.length());
1260
1261     if (text.empty())
1262         return;
1263
1264     Font* f = ((wxGDIPlusFontData*)m_font.GetRefData())->GetGDIPlusFont();
1265     wxWCharBuffer ws = text.wc_str( *wxConvUI );
1266     size_t len = wcslen( ws ) ;
1267     wxASSERT_MSG(text.length() == len , wxT("GetPartialTextExtents not yet implemented for multichar situations"));
1268
1269     RectF layoutRect(0,0, 100000.0f, 100000.0f);
1270     StringFormat strFormat( StringFormat::GenericTypographic() );
1271
1272     CharacterRange* ranges = new CharacterRange[len] ;
1273     Region* regions = new Region[len];
1274     for( size_t i = 0 ; i < len ; ++i)
1275     {
1276         ranges[i].First = i ;
1277         ranges[i].Length = 1 ;
1278     }
1279     strFormat.SetMeasurableCharacterRanges(len,ranges);
1280     strFormat.SetFormatFlags( StringFormatFlagsMeasureTrailingSpaces | strFormat.GetFormatFlags() );
1281     m_context->MeasureCharacterRanges(ws, -1 , f,layoutRect, &strFormat,1,regions) ;
1282
1283     RectF bbox ;
1284     for ( size_t i = 0 ; i < len ; ++i)
1285     {
1286         regions[i].GetBounds(&bbox,m_context);
1287         widths[i] = bbox.GetRight()-bbox.GetLeft();
1288     }
1289 }
1290
1291 bool wxGDIPlusContext::ShouldOffset() const
1292 {
1293     int penwidth = 0 ;
1294     if ( !m_pen.IsNull() )
1295     {
1296         penwidth = (int)((wxGDIPlusPenData*)m_pen.GetRefData())->GetWidth();
1297         if ( penwidth == 0 )
1298             penwidth = 1;
1299     }
1300     return ( penwidth % 2 ) == 1;
1301 }
1302
1303 void* wxGDIPlusContext::GetNativeContext()
1304 {
1305     return m_context;
1306 }
1307
1308 // concatenates this transform with the current transform of this context
1309 void wxGDIPlusContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1310 {
1311     m_context->MultiplyTransform((Matrix*) matrix.GetNativeMatrix());
1312 }
1313
1314 // sets the transform of this context
1315 void wxGDIPlusContext::SetTransform( const wxGraphicsMatrix& matrix )
1316 {
1317     m_context->SetTransform((Matrix*) matrix.GetNativeMatrix());
1318 }
1319
1320 // gets the matrix of this context
1321 wxGraphicsMatrix wxGDIPlusContext::GetTransform() const
1322 {
1323     wxGraphicsMatrix matrix = CreateMatrix();
1324     m_context->GetTransform((Matrix*) matrix.GetNativeMatrix());
1325     return matrix;
1326 }
1327 //-----------------------------------------------------------------------------
1328 // wxGDIPlusRenderer declaration
1329 //-----------------------------------------------------------------------------
1330
1331 class wxGDIPlusRenderer : public wxGraphicsRenderer
1332 {
1333 public :
1334     wxGDIPlusRenderer()
1335     {
1336         m_loaded = false;
1337         m_gditoken = 0;
1338     }
1339
1340     virtual ~wxGDIPlusRenderer()
1341     {
1342         if (m_loaded)
1343         {
1344             Unload();
1345         }
1346     }
1347
1348     // Context
1349
1350     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
1351
1352     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
1353
1354     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
1355
1356     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
1357
1358     virtual wxGraphicsContext * CreateContext( wxWindow* window );
1359
1360     virtual wxGraphicsContext * CreateMeasuringContext();
1361
1362     // Path
1363
1364     virtual wxGraphicsPath CreatePath();
1365
1366     // Matrix
1367
1368     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
1369         wxDouble tx=0.0, wxDouble ty=0.0);
1370
1371
1372     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
1373
1374     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
1375
1376     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1377     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1378         const wxColour&c1, const wxColour&c2) ;
1379
1380     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1381     // with radius r and color cColor
1382     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1383         const wxColour &oColor, const wxColour &cColor) ;
1384
1385     // sets the font
1386     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
1387 protected :
1388     void EnsureIsLoaded();
1389     void Load();
1390     void Unload();
1391     friend class wxGDIPlusRendererModule;
1392
1393 private :
1394     bool m_loaded;
1395     ULONG_PTR m_gditoken;
1396
1397     DECLARE_DYNAMIC_CLASS_NO_COPY(wxGDIPlusRenderer)
1398 } ;
1399
1400 //-----------------------------------------------------------------------------
1401 // wxGDIPlusRenderer implementation
1402 //-----------------------------------------------------------------------------
1403
1404 IMPLEMENT_DYNAMIC_CLASS(wxGDIPlusRenderer,wxGraphicsRenderer)
1405
1406 static wxGDIPlusRenderer gs_GDIPlusRenderer;
1407
1408 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
1409 {
1410     return &gs_GDIPlusRenderer;
1411 }
1412
1413 void wxGDIPlusRenderer::EnsureIsLoaded()
1414 {
1415     if (!m_loaded)
1416     {
1417         Load();
1418     }
1419 }
1420
1421 void wxGDIPlusRenderer::Load()
1422 {
1423     GdiplusStartupInput input;
1424     GdiplusStartupOutput output;
1425     GdiplusStartup(&m_gditoken,&input,&output);
1426     m_loaded = true;
1427 }
1428
1429 void wxGDIPlusRenderer::Unload()
1430 {
1431     if ( m_gditoken )
1432     {
1433         GdiplusShutdown(m_gditoken);
1434         m_gditoken = NULL;
1435     }
1436     m_loaded = false;
1437 }
1438
1439 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( const wxWindowDC& dc)
1440 {
1441     EnsureIsLoaded();
1442     wxMSWDCImpl *msw = wxDynamicCast( dc.GetImpl() , wxMSWDCImpl );
1443     return new wxGDIPlusContext(this,(HDC) msw->GetHDC());
1444 }
1445
1446 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( const wxMemoryDC& dc)
1447 {
1448     EnsureIsLoaded();
1449     wxMSWDCImpl *msw = wxDynamicCast( dc.GetImpl() , wxMSWDCImpl );
1450     return new wxGDIPlusContext(this,(HDC) msw->GetHDC());
1451 }
1452
1453 wxGraphicsContext * wxGDIPlusRenderer::CreateMeasuringContext()
1454 {
1455     EnsureIsLoaded();
1456     return new wxGDIPlusMeasuringContext(this);
1457 }
1458
1459 wxGraphicsContext * wxGDIPlusRenderer::CreateContextFromNativeContext( void * context )
1460 {
1461     EnsureIsLoaded();
1462     return new wxGDIPlusContext(this,(Graphics*) context);
1463 }
1464
1465
1466 wxGraphicsContext * wxGDIPlusRenderer::CreateContextFromNativeWindow( void * window )
1467 {
1468     EnsureIsLoaded();
1469     return new wxGDIPlusContext(this,(HWND) window);
1470 }
1471
1472 wxGraphicsContext * wxGDIPlusRenderer::CreateContext( wxWindow* window )
1473 {
1474     EnsureIsLoaded();
1475     return new wxGDIPlusContext(this, (HWND) window->GetHWND() );
1476 }
1477
1478 // Path
1479
1480 wxGraphicsPath wxGDIPlusRenderer::CreatePath()
1481 {
1482     EnsureIsLoaded();
1483     wxGraphicsPath m;
1484     m.SetRefData( new wxGDIPlusPathData(this));
1485     return m;
1486 }
1487
1488
1489 // Matrix
1490
1491 wxGraphicsMatrix wxGDIPlusRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1492                                                            wxDouble tx, wxDouble ty)
1493
1494 {
1495     EnsureIsLoaded();
1496     wxGraphicsMatrix m;
1497     wxGDIPlusMatrixData* data = new wxGDIPlusMatrixData( this );
1498     data->Set( a,b,c,d,tx,ty ) ;
1499     m.SetRefData(data);
1500     return m;
1501 }
1502
1503 wxGraphicsPen wxGDIPlusRenderer::CreatePen(const wxPen& pen)
1504 {
1505     EnsureIsLoaded();
1506     if ( !pen.Ok() || pen.GetStyle() == wxTRANSPARENT )
1507         return wxNullGraphicsPen;
1508     else
1509     {
1510         wxGraphicsPen p;
1511         p.SetRefData(new wxGDIPlusPenData( this, pen ));
1512         return p;
1513     }
1514 }
1515
1516 wxGraphicsBrush wxGDIPlusRenderer::CreateBrush(const wxBrush& brush )
1517 {
1518     EnsureIsLoaded();
1519     if ( !brush.Ok() || brush.GetStyle() == wxTRANSPARENT )
1520         return wxNullGraphicsBrush;
1521     else
1522     {
1523         wxGraphicsBrush p;
1524         p.SetRefData(new wxGDIPlusBrushData( this, brush ));
1525         return p;
1526     }
1527 }
1528
1529 // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1530 wxGraphicsBrush wxGDIPlusRenderer::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1531                                                                       const wxColour&c1, const wxColour&c2)
1532 {
1533     EnsureIsLoaded();
1534     wxGraphicsBrush p;
1535     wxGDIPlusBrushData* d = new wxGDIPlusBrushData( this );
1536     d->CreateLinearGradientBrush(x1, y1, x2, y2, c1, c2);
1537     p.SetRefData(d);
1538     return p;
1539  }
1540
1541 // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1542 // with radius r and color cColor
1543 wxGraphicsBrush wxGDIPlusRenderer::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1544                                                                       const wxColour &oColor, const wxColour &cColor)
1545 {
1546     EnsureIsLoaded();
1547     wxGraphicsBrush p;
1548     wxGDIPlusBrushData* d = new wxGDIPlusBrushData( this );
1549     d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,oColor,cColor);
1550     p.SetRefData(d);
1551     return p;
1552 }
1553
1554 // sets the font
1555 wxGraphicsFont wxGDIPlusRenderer::CreateFont( const wxFont &font , const wxColour &col )
1556 {
1557     EnsureIsLoaded();
1558     if ( font.Ok() )
1559     {
1560         wxGraphicsFont p;
1561         p.SetRefData(new wxGDIPlusFontData( this , font, col ));
1562         return p;
1563     }
1564     else
1565         return wxNullGraphicsFont;
1566 }
1567
1568 // Shutdown GDI+ at app exit, before possible dll unload
1569 class wxGDIPlusRendererModule : public wxModule
1570 {
1571 public:
1572     virtual bool OnInit() { return true; }
1573     virtual void OnExit() { gs_GDIPlusRenderer.Unload(); }
1574
1575 private:
1576     DECLARE_DYNAMIC_CLASS(wxGDIPlusRendererModule)
1577 };
1578
1579 IMPLEMENT_DYNAMIC_CLASS(wxGDIPlusRendererModule, wxModule)
1580
1581 #endif  // wxUSE_GRAPHICS_CONTEXT