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 #ifndef WX_PRECOMP
  21 #include "wx/msw/wrapcdlg.h"
  22 #include "wx/image.h"
  23 #include "wx/window.h"
  24 #include "wx/dc.h"
  25 #include "wx/utils.h"
  26 #include "wx/dialog.h"
  27 #include "wx/app.h"
  28 #include "wx/bitmap.h"
  29 #include "wx/dcmemory.h"
  30 #include "wx/log.h"
  31 #include "wx/icon.h"
  32 #include "wx/dcprint.h"
  33 #include "wx/module.h"
  34 #endif
  35
  36 #include "wx/graphics.h"
  37
  38 #if wxUSE_GRAPHICS_CONTEXT
  39
  40 #include <vector>
  41
  42 using namespace std;
  43
  44 //-----------------------------------------------------------------------------
  45 // constants
  46 //-----------------------------------------------------------------------------
  47
  48 const double RAD2DEG = 180.0 / M_PI;
  49
  50 //-----------------------------------------------------------------------------
  51 // Local functions
  52 //-----------------------------------------------------------------------------
  53
  54 static inline double dmin(double a, double b) { return a < b ? a : b; }
  55 static inline double dmax(double a, double b) { return a > b ? a : b; }
  56
  57 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
  58 static inline double RadToDeg(double deg) { return (deg * 180.0) / M_PI; }
  59
  60 //-----------------------------------------------------------------------------
  61 // device context implementation
  62 //
  63 // more and more of the dc functionality should be implemented by calling
  64 // the appropricate wxGDIPlusContext, but we will have to do that step by step
  65 // also coordinate conversions should be moved to native matrix ops
  66 //-----------------------------------------------------------------------------
  67
  68 // we always stock two context states, one at entry, to be able to preserve the
  69 // state we were called with, the other one after changing to HI Graphics orientation
  70 // (this one is used for getting back clippings etc)
  71
  72 //-----------------------------------------------------------------------------
  73 // wxGraphicsPath implementation
  74 //-----------------------------------------------------------------------------
  75
  76 #include "wx/msw/private.h" // needs to be before #include <commdlg.h>
  77
  78 #if wxUSE_COMMON_DIALOGS && !defined(__WXMICROWIN__)
  79 #include <commdlg.h>
  80 #endif
  81
  82 // TODO remove this dependency (gdiplus needs the macros)
  83
  84 #ifndef max
  85 #define max(a,b)            (((a) > (b)) ? (a) : (b))
  86 #endif
  87
  88 #ifndef min
  89 #define min(a,b)            (((a) < (b)) ? (a) : (b))
  90 #endif
  91
  92 #include "gdiplus.h"
  93 using namespace Gdiplus;
  94
  95 class GDILoader
  96 {
  97 public :
  98     GDILoader()
  99     {
 100         m_loaded = false;
 101         m_gditoken = NULL;
 102     }
 103
 104     ~GDILoader()
 105     {
 106         if (m_loaded)
 107         {
 108             Unload();
 109         }
 110     }
 111     void EnsureIsLoaded()
 112     {
 113         if (!m_loaded)
 114         {
 115             Load();
 116         }
 117     }
 118     void Load()
 119     {
 120         GdiplusStartupInput input;
 121         GdiplusStartupOutput output;
 122         GdiplusStartup(&m_gditoken,&input,&output);
 123         m_loaded = true;
 124     }
 125     void Unload()
 126     {
 127         if ( m_gditoken )
 128             GdiplusShutdown(m_gditoken);
 129     }
 130 private :
 131     bool m_loaded;
 132     DWORD m_gditoken;
 133
 134 };
 135
 136 static GDILoader gGDILoader;
 137
 138 class WXDLLEXPORT wxGDIPlusPath : public wxGraphicsPath
 139 {
 140     DECLARE_NO_COPY_CLASS(wxGDIPlusPath)
 141 public :
 142     wxGDIPlusPath();
 143     ~wxGDIPlusPath();
 144
 145
 146     //
 147     // These are the path primitives from which everything else can be constructed
 148     //
 149
 150     // begins a new subpath at (x,y)
 151     virtual void MoveToPoint( wxDouble x, wxDouble y );
 152
 153     // adds a straight line from the current point to (x,y)
 154     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 155
 156     // adds a cubic Bezier curve from the current point, using two control points and an end point
 157     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 158
 159
 160     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 161     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 162
 163     // gets the last point of the current path, (0,0) if not yet set
 164     virtual void GetCurrentPoint( wxDouble& x, wxDouble&y) ;
 165
 166     // closes the current sub-path
 167     virtual void CloseSubpath();
 168
 169     //
 170     // These are convenience functions which - if not available natively will be assembled
 171     // using the primitives from above
 172     //
 173
 174     // appends a rectangle as a new closed subpath
 175     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 176     /*
 177
 178     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 179     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 180
 181     // 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)
 182     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 183 */
 184
 185         // returns the native path
 186         virtual void * GetNativePath() const { return m_path; }
 187
 188         // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 189         virtual void UnGetNativePath(void *p) {}
 190
 191 private :
 192     GraphicsPath* m_path;
 193 };
 194
 195 class WXDLLEXPORT wxGDIPlusContext : public wxGraphicsContext
 196 {
 197     DECLARE_NO_COPY_CLASS(wxGDIPlusContext)
 198
 199 public:
 200     wxGDIPlusContext( WXHDC hdc );
 201     wxGDIPlusContext();
 202     virtual ~wxGDIPlusContext();
 203
 204     virtual void Clip( const wxRegion &region );
 205     // clips drawings to the rect
 206     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 207
 208         // resets the clipping to original extent
 209         virtual void ResetClip();
 210
 211         virtual void * GetNativeContext();
 212
 213     virtual void StrokePath( const wxGraphicsPath *p );
 214     virtual void FillPath( const wxGraphicsPath *p , int fillStyle = wxWINDING_RULE );
 215
 216     virtual wxGraphicsPath* CreatePath();
 217     virtual void SetPen( const wxPen &pen );
 218     virtual void SetBrush( const wxBrush &brush );
 219     virtual void SetLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2) ;
 220     virtual void SetRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 221         const wxColour &oColor, const wxColour &cColor);
 222
 223     virtual void Translate( wxDouble dx , wxDouble dy );
 224     virtual void Scale( wxDouble xScale , wxDouble yScale );
 225     virtual void Rotate( wxDouble angle );
 226
 227     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 228     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 229     virtual void PushState();
 230     virtual void PopState();
 231
 232     virtual void SetFont( const wxFont &font );
 233     virtual void SetTextColor( const wxColour &col );
 234     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y);
 235     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 236         wxDouble *descent, wxDouble *externalLeading ) const;
 237     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 238
 239 private:
 240     Graphics* m_context;
 241     vector<GraphicsState> m_stateStack;
 242     GraphicsState m_state1;
 243     GraphicsState m_state2;
 244
 245     Pen* m_pen;
 246     bool m_penTransparent;
 247     Image* m_penImage;
 248     Brush* m_penBrush;
 249
 250     Brush* m_brush;
 251     bool m_brushTransparent;
 252     Image* m_brushImage;
 253     GraphicsPath* m_brushPath;
 254
 255     Brush* m_textBrush;
 256     Font* m_font;
 257     // wxPen m_pen;
 258     // wxBrush m_brush;
 259 };
 260
 261 wxGDIPlusPath::wxGDIPlusPath()
 262 {
 263     m_path = new GraphicsPath();
 264 }
 265
 266 wxGDIPlusPath::~wxGDIPlusPath()
 267 {
 268     delete m_path;
 269 }
 270
 271 //
 272 // The Primitives
 273 //
 274
 275 void wxGDIPlusPath::MoveToPoint( wxDouble x , wxDouble y )
 276 {
 277     m_path->StartFigure();
 278     m_path->AddLine((REAL) x,(REAL) y,(REAL) x,(REAL) y);
 279 }
 280
 281 void wxGDIPlusPath::AddLineToPoint( wxDouble x , wxDouble y )
 282 {
 283     m_path->AddLine((REAL) x,(REAL) y,(REAL) x,(REAL) y);
 284 }
 285
 286 void wxGDIPlusPath::CloseSubpath()
 287 {
 288     m_path->CloseFigure();
 289 }
 290
 291 void wxGDIPlusPath::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 292 {
 293     PointF c1(cx1,cy1);
 294     PointF c2(cx2,cy2);
 295     PointF end(x,y);
 296     PointF start;
 297     m_path->GetLastPoint(&start);
 298     m_path->AddBezier(start,c1,c2,end);
 299 }
 300
 301 // gets the last point of the current path, (0,0) if not yet set
 302 void wxGDIPlusPath::GetCurrentPoint( wxDouble& x, wxDouble&y)
 303 {
 304     PointF start;
 305     m_path->GetLastPoint(&start);
 306     x = start.X ;
 307     y = start.Y ;
 308 }
 309
 310 void wxGDIPlusPath::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 311 {
 312     double sweepAngle = endAngle - startAngle ;
 313     if( abs(sweepAngle) >= 2*M_PI)
 314     {
 315         sweepAngle = 2 * M_PI;
 316     }
 317     else
 318     {
 319         if ( clockwise )
 320         {
 321             if( sweepAngle < 0 )
 322                 sweepAngle += 2 * M_PI;
 323         }
 324         else
 325         {
 326             if( sweepAngle > 0 )
 327                 sweepAngle -= 2 * M_PI;
 328
 329         }
 330    }
 331    m_path->AddArc((REAL) (x-r),(REAL) (y-r),(REAL) (2*r),(REAL) (2*r),RadToDeg(startAngle),RadToDeg(sweepAngle));
 332 }
 333
 334 void wxGDIPlusPath::AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 335 {
 336     m_path->AddRectangle(RectF(x,y,w,h));
 337 }
 338
 339 //
 340 //
 341 //
 342 /*
 343 // closes the current subpath
 344 void wxGDIPlusPath::AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )
 345 {
 346 //    CGPathAddArcToPoint( m_path, NULL , x1, y1, x2, y2, r);
 347 }
 348
 349 */
 350
 351 //-----------------------------------------------------------------------------
 352 // wxGDIPlusContext implementation
 353 //-----------------------------------------------------------------------------
 354
 355 wxGDIPlusContext::wxGDIPlusContext( WXHDC hdc  )
 356 {
 357     gGDILoader.EnsureIsLoaded();
 358     m_context = new Graphics( (HDC) hdc);
 359     m_context->SetSmoothingMode(SmoothingModeHighQuality);
 360     m_state1 = m_context->Save();
 361     m_state2 = m_context->Save();
 362
 363     // set defaults
 364
 365     m_penTransparent = false;
 366     m_pen = new Pen((ARGB)Color::Black);
 367     m_penImage = NULL;
 368     m_penBrush = NULL;
 369
 370     m_brushTransparent = false;
 371     m_brush = new SolidBrush((ARGB)Color::White);
 372     m_brushImage = NULL;
 373     m_brushPath = NULL;
 374     m_textBrush = new SolidBrush((ARGB)Color::Black);
 375     m_font = new Font( L"Arial" , 9 , FontStyleRegular );
 376 }
 377
 378 wxGDIPlusContext::~wxGDIPlusContext()
 379 {
 380     if ( m_context )
 381     {
 382         m_context->Restore( m_state2 );
 383         m_context->Restore( m_state1 );
 384         delete m_context;
 385         delete m_pen;
 386         delete m_penImage;
 387         delete m_penBrush;
 388         delete m_brush;
 389         delete m_brushImage;
 390         delete m_brushPath;
 391         delete m_textBrush;
 392         delete m_font;
 393     }
 394 }
 395
 396
 397 void wxGDIPlusContext::Clip( const wxRegion & WXUNUSED(region) )
 398 {
 399 // TODO
 400 }
 401
 402 void wxGDIPlusContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 403 {
 404 // TODO
 405 }
 406
 407 void wxGDIPlusContext::ResetClip()
 408 {
 409 // TODO
 410 }
 411
 412 void wxGDIPlusContext::StrokePath( const wxGraphicsPath *path )
 413 {
 414     if ( m_penTransparent )
 415         return;
 416
 417     m_context->DrawPath( m_pen , (GraphicsPath*) path->GetNativePath() );
 418 }
 419
 420 void wxGDIPlusContext::FillPath( const wxGraphicsPath *path , int fillStyle )
 421 {
 422     if ( !m_brushTransparent )
 423     {
 424         ((GraphicsPath*) path->GetNativePath())->SetFillMode( fillStyle == wxODDEVEN_RULE ? FillModeAlternate : FillModeWinding);
 425         m_context->FillPath( m_brush , (GraphicsPath*) path->GetNativePath());
 426     }
 427 }
 428
 429 wxGraphicsPath* wxGDIPlusContext::CreatePath()
 430 {
 431     return new wxGDIPlusPath();
 432 }
 433
 434 void wxGDIPlusContext::Rotate( wxDouble angle )
 435 {
 436     m_context->RotateTransform( RadToDeg(angle) );
 437 }
 438
 439 void wxGDIPlusContext::Translate( wxDouble dx , wxDouble dy )
 440 {
 441     m_context->TranslateTransform( dx , dy );
 442 }
 443
 444 void wxGDIPlusContext::Scale( wxDouble xScale , wxDouble yScale )
 445 {
 446     m_context->ScaleTransform(xScale,yScale);
 447 }
 448
 449 void wxGDIPlusContext::PushState()
 450 {
 451     GraphicsState state = m_context->Save();
 452     m_stateStack.push_back(state);
 453 }
 454
 455 void wxGDIPlusContext::PopState()
 456 {
 457     GraphicsState state = m_stateStack.back();
 458     m_stateStack.pop_back();
 459     m_context->Restore(state);
 460 }
 461
 462 void wxGDIPlusContext::SetTextColor( const wxColour &col )
 463 {
 464     delete m_textBrush;
 465     m_textBrush = new SolidBrush( Color( col.Alpha() , col.Red() ,
 466         col.Green() , col.Blue() ));
 467 }
 468
 469 void wxGDIPlusContext::SetPen( const wxPen &pen )
 470 {
 471     m_penTransparent = pen.GetStyle() == wxTRANSPARENT;
 472     if ( m_penTransparent )
 473         return;
 474
 475     m_pen->SetColor( Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 476         pen.GetColour().Green() , pen.GetColour().Blue() ) );
 477
 478     // TODO: * m_dc->m_scaleX
 479     double penWidth = pen.GetWidth();
 480     if (penWidth <= 0.0)
 481         penWidth = 0.1;
 482
 483     m_pen->SetWidth(penWidth);
 484
 485     LineCap cap;
 486     switch ( pen.GetCap() )
 487     {
 488     case wxCAP_ROUND :
 489         cap = LineCapRound;
 490         break;
 491
 492     case wxCAP_PROJECTING :
 493         cap = LineCapSquare;
 494         break;
 495
 496     case wxCAP_BUTT :
 497         cap = LineCapFlat; // TODO verify
 498         break;
 499
 500     default :
 501         cap = LineCapFlat;
 502         break;
 503     }
 504     m_pen->SetLineCap(cap,cap, DashCapFlat);
 505
 506     LineJoin join;
 507     switch ( pen.GetJoin() )
 508     {
 509     case wxJOIN_BEVEL :
 510         join = LineJoinBevel;
 511         break;
 512
 513     case wxJOIN_MITER :
 514         join = LineJoinMiter;
 515         break;
 516
 517     case wxJOIN_ROUND :
 518         join = LineJoinRound;
 519         break;
 520
 521     default :
 522         join = LineJoinMiter;
 523         break;
 524     }
 525
 526     m_pen->SetLineJoin(join);
 527
 528     m_pen->SetDashStyle(DashStyleSolid);
 529
 530     DashStyle dashStyle = DashStyleSolid;
 531     switch ( pen.GetStyle() )
 532     {
 533     case wxSOLID :
 534         break;
 535
 536     case wxDOT :
 537         dashStyle = DashStyleDot;
 538         break;
 539
 540     case wxLONG_DASH :
 541         dashStyle = DashStyleDash; // TODO verify
 542         break;
 543
 544     case wxSHORT_DASH :
 545         dashStyle = DashStyleDash;
 546         break;
 547
 548     case wxDOT_DASH :
 549         dashStyle = DashStyleDashDot;
 550         break;
 551     case wxUSER_DASH :
 552         {
 553             dashStyle = DashStyleCustom;
 554             wxDash *dashes;
 555             int count = pen.GetDashes( &dashes );
 556             if ((dashes != NULL) && (count > 0))
 557             {
 558                 REAL *userLengths = new REAL[count];
 559                 for ( int i = 0; i < count; ++i )
 560                 {
 561                     userLengths[i] = dashes[i];
 562                 }
 563                 m_pen->SetDashPattern( userLengths, count);
 564                 delete[] userLengths;
 565             }
 566         }
 567         break;
 568     case wxSTIPPLE :
 569         {
 570             wxBitmap* bmp = pen.GetStipple();
 571             if ( bmp && bmp->Ok() )
 572             {
 573                 wxDELETE( m_penImage );
 574                 wxDELETE( m_penBrush );
 575                 m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 576                 m_penBrush = new TextureBrush(m_penImage);
 577                 m_pen->SetBrush( m_penBrush );
 578             }
 579
 580         }
 581         break;
 582     default :
 583         if ( pen.GetStyle() >= wxFIRST_HATCH && pen.GetStyle() <= wxLAST_HATCH )
 584         {
 585             wxDELETE( m_penBrush );
 586             HatchStyle style = HatchStyleHorizontal;
 587             switch( pen.GetStyle() )
 588             {
 589             case wxBDIAGONAL_HATCH :
 590                 style = HatchStyleBackwardDiagonal;
 591                 break ;
 592             case wxCROSSDIAG_HATCH :
 593                 style = HatchStyleDiagonalCross;
 594                 break ;
 595             case wxFDIAGONAL_HATCH :
 596                 style = HatchStyleForwardDiagonal;
 597                 break ;
 598             case wxCROSS_HATCH :
 599                 style = HatchStyleCross;
 600                 break ;
 601             case wxHORIZONTAL_HATCH :
 602                 style = HatchStyleHorizontal;
 603                 break ;
 604             case wxVERTICAL_HATCH :
 605                 style = HatchStyleVertical;
 606                 break ;
 607
 608             }
 609             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 610                 pen.GetColour().Green() , pen.GetColour().Blue() ), Color::Transparent );
 611             m_pen->SetBrush( m_penBrush );
 612         }
 613         break;
 614     }
 615     if ( dashStyle != DashStyleSolid )
 616         m_pen->SetDashStyle(dashStyle);
 617 }
 618
 619 void wxGDIPlusContext::SetBrush( const wxBrush &brush )
 620 {
 621 //    m_brush = brush;
 622     if ( m_context == NULL )
 623         return;
 624
 625     m_brushTransparent = brush.GetStyle() == wxTRANSPARENT;
 626
 627     if ( m_brushTransparent )
 628         return;
 629
 630     wxDELETE(m_brush);
 631
 632     if ( brush.GetStyle() == wxSOLID)
 633     {
 634         m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 635             brush.GetColour().Green() , brush.GetColour().Blue() ) );
 636     }
 637     else if ( brush.IsHatch() )
 638     {
 639         HatchStyle style = HatchStyleHorizontal;
 640         switch( brush.GetStyle() )
 641         {
 642         case wxBDIAGONAL_HATCH :
 643             style = HatchStyleBackwardDiagonal;
 644             break ;
 645         case wxCROSSDIAG_HATCH :
 646             style = HatchStyleDiagonalCross;
 647             break ;
 648         case wxFDIAGONAL_HATCH :
 649             style = HatchStyleForwardDiagonal;
 650             break ;
 651         case wxCROSS_HATCH :
 652             style = HatchStyleCross;
 653             break ;
 654         case wxHORIZONTAL_HATCH :
 655             style = HatchStyleHorizontal;
 656             break ;
 657         case wxVERTICAL_HATCH :
 658             style = HatchStyleVertical;
 659             break ;
 660
 661         }
 662         m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 663             brush.GetColour().Green() , brush.GetColour().Blue() ), Color::Transparent );
 664     }
 665     else
 666     {
 667         wxBitmap* bmp = brush.GetStipple();
 668         if ( bmp && bmp->Ok() )
 669         {
 670             wxDELETE( m_brushImage );
 671             m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 672             m_brush = new TextureBrush(m_brushImage);
 673         }
 674     }
 675 }
 676
 677 void wxGDIPlusContext::SetLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2)
 678 {
 679     m_brushTransparent = false ;
 680
 681     wxDELETE(m_brush);
 682
 683     m_brush = new LinearGradientBrush( PointF( x1,y1) , PointF( x2,y2),
 684         Color( c1.Alpha(), c1.Red(),c1.Green() , c1.Blue() ),
 685         Color( c2.Alpha(), c2.Red(),c2.Green() , c2.Blue() ));
 686 }
 687
 688 void wxGDIPlusContext::SetRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 689                                     const wxColour &oColor, const wxColour &cColor)
 690 {
 691     m_brushTransparent = false ;
 692
 693     wxDELETE(m_brush);
 694     wxDELETE(m_brushPath);
 695
 696     // Create a path that consists of a single circle.
 697     m_brushPath = new GraphicsPath();
 698     m_brushPath->AddEllipse( (REAL)(xc-radius), (REAL)(yc-radius), (REAL)(2*radius), (REAL)(2*radius));
 699
 700     PathGradientBrush *b = new PathGradientBrush(m_brushPath);
 701     m_brush = b;
 702     b->SetCenterPoint( PointF(xo,yo));
 703     b->SetCenterColor(Color( oColor.Alpha(), oColor.Red(),oColor.Green() , oColor.Blue() ));
 704
 705     Color colors[] = {Color( cColor.Alpha(), cColor.Red(),cColor.Green() , cColor.Blue() )};
 706     int count = 1;
 707     b->SetSurroundColors(colors, &count);
 708 }
 709
 710 // the built-in conversions functions create non-premultiplied bitmaps, while GDIPlus needs them in the
 711 // premultiplied format, therefore in the failing cases we create a new bitmap using the non-premultiplied
 712 // bytes as parameter
 713
 714 void wxGDIPlusContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 715 {
 716     Bitmap* image = NULL;
 717     Bitmap* helper = NULL;
 718     if ( bmp.GetMask() )
 719     {
 720         Bitmap interim((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE()) ;
 721
 722         size_t width = interim.GetWidth();
 723         size_t height = interim.GetHeight();
 724         Rect bounds(0,0,width,height);
 725
 726         image = new Bitmap(width,height,PixelFormat32bppPARGB) ;
 727
 728         Bitmap interimMask((HBITMAP)bmp.GetMask()->GetMaskBitmap(),NULL);
 729         wxASSERT(interimMask.GetPixelFormat() == PixelFormat1bppIndexed);
 730
 731         BitmapData dataMask ;
 732         interimMask.LockBits(&bounds,ImageLockModeRead,
 733             interimMask.GetPixelFormat(),&dataMask);
 734
 735
 736         BitmapData imageData ;
 737         image->LockBits(&bounds,ImageLockModeWrite, PixelFormat32bppPARGB, &imageData);
 738
 739         BYTE maskPattern = 0 ;
 740         BYTE maskByte = 0;
 741         size_t maskIndex ;
 742
 743         for ( size_t y = 0 ; y < height ; ++y)
 744         {
 745             maskIndex = 0 ;
 746             for( size_t x = 0 ; x < width; ++x)
 747             {
 748                 if ( x % 8 == 0)
 749                 {
 750                     maskPattern = 0x80;
 751                     maskByte = *((BYTE*)dataMask.Scan0 + dataMask.Stride*y + maskIndex);
 752                     maskIndex++;
 753                 }
 754                 else
 755                     maskPattern = maskPattern >> 1;
 756
 757                 ARGB *dest = (ARGB*)((BYTE*)imageData.Scan0 + imageData.Stride*y + x*4);
 758                 if ( (maskByte & maskPattern) == 0 )
 759                     *dest = 0x00000000;
 760                 else
 761                 {
 762                     Color c ;
 763                     interim.GetPixel(x,y,&c) ;
 764                     *dest = (c.GetValue() | Color::AlphaMask);
 765                 }
 766             }
 767         }
 768
 769         image->UnlockBits(&imageData);
 770
 771         interimMask.UnlockBits(&dataMask);
 772         interim.UnlockBits(&dataMask);
 773     }
 774     else
 775     {
 776         image = Bitmap::FromHBITMAP((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE());
 777         if ( GetPixelFormatSize(image->GetPixelFormat()) == 32 )
 778         {
 779             size_t width = image->GetWidth();
 780             size_t height = image->GetHeight();
 781             Rect bounds(0,0,width,height);
 782             BitmapData data ;
 783
 784             helper = image ;
 785             image = NULL ;
 786             helper->LockBits(&bounds, ImageLockModeRead,
 787                 helper->GetPixelFormat(),&data);
 788
 789             image = new Bitmap(data.Width, data.Height, data.Stride,
 790                 PixelFormat32bppARGB , (BYTE*) data.Scan0);
 791
 792             helper->UnlockBits(&data);
 793         }
 794     }
 795     if ( image )
 796         m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
 797     delete image ;
 798     delete helper ;
 799 }
 800
 801 void wxGDIPlusContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 802 {
 803     HICON hIcon = (HICON)icon.GetHICON();
 804     ICONINFO iconInfo ;
 805     // IconInfo creates the bitmaps for color and mask, we must dispose of them after use
 806     if (!GetIconInfo(hIcon,&iconInfo))
 807         return;
 808
 809     BITMAP iconBmpData ;
 810     GetObject(iconInfo.hbmColor,sizeof(BITMAP),&iconBmpData);
 811     Bitmap interim(iconInfo.hbmColor,NULL);
 812
 813     Bitmap* image = NULL ;
 814
 815     if( GetPixelFormatSize(interim.GetPixelFormat())!= 32 )
 816     {
 817         image = Bitmap::FromHICON(hIcon);
 818     }
 819     else
 820     {
 821         size_t width = interim.GetWidth();
 822         size_t height = interim.GetHeight();
 823         Rect bounds(0,0,width,height);
 824         BitmapData data ;
 825
 826         interim.LockBits(&bounds, ImageLockModeRead,
 827             interim.GetPixelFormat(),&data);
 828         image = new Bitmap(data.Width, data.Height, data.Stride,
 829             PixelFormat32bppARGB , (BYTE*) data.Scan0);
 830         interim.UnlockBits(&data);
 831     }
 832
 833     m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
 834
 835     delete image ;
 836     DeleteObject(iconInfo.hbmColor);
 837     DeleteObject(iconInfo.hbmMask);
 838 }
 839
 840
 841 void wxGDIPlusContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
 842 {
 843     if ( str.IsEmpty())
 844         return ;
 845
 846     wxWCharBuffer s = str.wc_str( *wxConvUI );
 847     m_context->DrawString( s , -1 , m_font , PointF( x , y ) , m_textBrush );
 848     // TODO m_backgroundMode == wxSOLID
 849 }
 850
 851 void wxGDIPlusContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 852                                      wxDouble *descent, wxDouble *externalLeading ) const
 853 {
 854     wxWCharBuffer s = str.wc_str( *wxConvUI );
 855     FontFamily ffamily ;
 856
 857     m_font->GetFamily(&ffamily) ;
 858
 859     REAL factorY = m_context->GetDpiY() / 72.0 ;
 860
 861     REAL rDescent = ffamily.GetCellDescent(FontStyleRegular) *
 862         m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 863     REAL rAscent = ffamily.GetCellAscent(FontStyleRegular) *
 864         m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 865     REAL rHeight = ffamily.GetLineSpacing(FontStyleRegular) *
 866         m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 867
 868     if ( height )
 869         *height = rHeight * factorY + 0.5 ;
 870     if ( descent )
 871         *descent = rDescent * factorY + 0.5 ;
 872     if ( externalLeading )
 873         *externalLeading = (rHeight - rAscent - rDescent) * factorY + 0.5 ;
 874     // measuring empty strings is not guaranteed, so do it by hand
 875     if ( str.IsEmpty())
 876     {
 877         if ( width )
 878             *width = 0 ;
 879     }
 880     else
 881     {
 882         // MeasureString does return a rectangle that is way too large, so it is
 883         // not usable here
 884         RectF layoutRect(0,0, 100000.0f, 100000.0f);
 885         StringFormat strFormat;
 886         CharacterRange strRange(0,wcslen(s));
 887         strFormat.SetMeasurableCharacterRanges(1,&strRange);
 888         Region region ;
 889         m_context->MeasureCharacterRanges(s, -1 , m_font,layoutRect, &strFormat,1,&region) ;
 890         RectF bbox ;
 891         region.GetBounds(&bbox,m_context);
 892         if ( width )
 893             *width = bbox.GetRight()-bbox.GetLeft()+0.5;
 894     }
 895 }
 896
 897 void wxGDIPlusContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
 898 {
 899     widths.Empty();
 900     widths.Add(0, text.length());
 901
 902     if (text.empty())
 903         return;
 904
 905     wxWCharBuffer ws = text.wc_str( *wxConvUI );
 906     size_t len = wcslen( ws ) ;
 907     wxASSERT_MSG(text.length() == len , wxT("GetPartialTextExtents not yet implemented for multichar situations"));
 908
 909     RectF layoutRect(0,0, 100000.0f, 100000.0f);
 910     StringFormat strFormat;
 911
 912     CharacterRange* ranges = new CharacterRange[len] ;
 913     Region* regions = new Region[len];
 914     for( size_t i = 0 ; i < len ; ++i)
 915     {
 916         ranges[i].First = i ;
 917         ranges[i].Length = 1 ;
 918     }
 919     strFormat.SetMeasurableCharacterRanges(len,ranges);
 920     m_context->MeasureCharacterRanges(ws, -1 , m_font,layoutRect, &strFormat,1,regions) ;
 921
 922     RectF bbox ;
 923     for ( size_t i = 0 ; i < len ; ++i)
 924     {
 925         regions[i].GetBounds(&bbox,m_context);
 926         widths[i] = bbox.GetRight()-bbox.GetLeft();
 927     }
 928 }
 929
 930 void wxGDIPlusContext::SetFont( const wxFont &font )
 931 {
 932     wxASSERT( font.Ok());
 933     delete m_font;
 934     wxWCharBuffer s = font.GetFaceName().wc_str( *wxConvUI );
 935     int size = font.GetPointSize();
 936     int style = FontStyleRegular;
 937     if ( font.GetStyle() == wxFONTSTYLE_ITALIC )
 938         style |= FontStyleItalic;
 939     if ( font.GetUnderlined() )
 940         style |= FontStyleUnderline;
 941     if ( font.GetWeight() == wxFONTWEIGHT_BOLD )
 942         style |= FontStyleBold;
 943     m_font = new Font( s , size , style );
 944 }
 945
 946 void* wxGDIPlusContext::GetNativeContext()
 947 {
 948         return m_context;
 949 }
 950
 951 wxGraphicsContext* wxGraphicsContext::Create( const wxWindowDC& dc)
 952 {
 953     return new wxGDIPlusContext( (HDC) dc.GetHDC() );
 954 }
 955
 956 wxGraphicsContext* wxGraphicsContext::Create( wxWindow * window )
 957 {
 958         return NULL; // TODO
 959 }
 960
 961 wxGraphicsContext* wxGraphicsContext::CreateFromNative( void * context )
 962 {
 963         return NULL; // TODO
 964 }
 965
 966
 967
 968 #endif  // wxUSE_GRAPHICS_CONTEXT