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     GraphicsPath* GetPath() const;
 186 private :
 187     GraphicsPath* m_path;
 188 };
 189
 190 class WXDLLEXPORT wxGDIPlusContext : public wxGraphicsContext
 191 {
 192     DECLARE_NO_COPY_CLASS(wxGDIPlusContext)
 193
 194 public:
 195     wxGDIPlusContext( WXHDC hdc );
 196     wxGDIPlusContext();
 197     virtual ~wxGDIPlusContext();
 198
 199     virtual void Clip( const wxRegion &region );
 200     // clips drawings to the rect
 201     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 202
 203         // resets the clipping to original extent
 204         virtual void ResetClip();
 205
 206         virtual void * GetNativeContext();
 207
 208     virtual void StrokePath( const wxGraphicsPath *p );
 209     virtual void FillPath( const wxGraphicsPath *p , int fillStyle = wxWINDING_RULE );
 210
 211     virtual wxGraphicsPath* CreatePath();
 212     virtual void SetPen( const wxPen &pen );
 213     virtual void SetBrush( const wxBrush &brush );
 214     virtual void SetLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2) ;
 215     virtual void SetRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 216         const wxColour &oColor, const wxColour &cColor);
 217
 218     virtual void Translate( wxDouble dx , wxDouble dy );
 219     virtual void Scale( wxDouble xScale , wxDouble yScale );
 220     virtual void Rotate( wxDouble angle );
 221
 222     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 223     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 224     virtual void PushState();
 225     virtual void PopState();
 226
 227     virtual void SetFont( const wxFont &font );
 228     virtual void SetTextColor( const wxColour &col );
 229     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y);
 230     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 231         wxDouble *descent, wxDouble *externalLeading ) const;
 232     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 233
 234 private:
 235     Graphics* m_context;
 236     vector<GraphicsState> m_stateStack;
 237     GraphicsState m_state1;
 238     GraphicsState m_state2;
 239
 240     Pen* m_pen;
 241     bool m_penTransparent;
 242     Image* m_penImage;
 243     Brush* m_penBrush;
 244
 245     Brush* m_brush;
 246     bool m_brushTransparent;
 247     Image* m_brushImage;
 248     GraphicsPath* m_brushPath;
 249
 250     Brush* m_textBrush;
 251     Font* m_font;
 252     // wxPen m_pen;
 253     // wxBrush m_brush;
 254 };
 255
 256 wxGDIPlusPath::wxGDIPlusPath()
 257 {
 258     m_path = new GraphicsPath();
 259 }
 260
 261 wxGDIPlusPath::~wxGDIPlusPath()
 262 {
 263     delete m_path;
 264 }
 265
 266 GraphicsPath* wxGDIPlusPath::GetPath() const
 267 {
 268     return 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 *p )
 413 {
 414     if ( m_penTransparent )
 415         return;
 416
 417     const wxGDIPlusPath* path = dynamic_cast< const wxGDIPlusPath*>( p );
 418     m_context->DrawPath( m_pen , path->GetPath() );
 419 }
 420
 421 void wxGDIPlusContext::FillPath( const wxGraphicsPath *p , int fillStyle )
 422 {
 423     if ( !m_brushTransparent )
 424     {
 425         const wxGDIPlusPath* path = dynamic_cast< const wxGDIPlusPath*>( p );
 426         path->GetPath()->SetFillMode( fillStyle == wxODDEVEN_RULE ? FillModeAlternate : FillModeWinding);
 427         m_context->FillPath( m_brush , path->GetPath() );
 428     }
 429 }
 430
 431 wxGraphicsPath* wxGDIPlusContext::CreatePath()
 432 {
 433     return new wxGDIPlusPath();
 434 }
 435
 436 void wxGDIPlusContext::Rotate( wxDouble angle )
 437 {
 438     m_context->RotateTransform( RadToDeg(angle) );
 439 }
 440
 441 void wxGDIPlusContext::Translate( wxDouble dx , wxDouble dy )
 442 {
 443     m_context->TranslateTransform( dx , dy );
 444 }
 445
 446 void wxGDIPlusContext::Scale( wxDouble xScale , wxDouble yScale )
 447 {
 448     m_context->ScaleTransform(xScale,yScale);
 449 }
 450
 451 void wxGDIPlusContext::PushState()
 452 {
 453     GraphicsState state = m_context->Save();
 454     m_stateStack.push_back(state);
 455 }
 456
 457 void wxGDIPlusContext::PopState()
 458 {
 459     GraphicsState state = m_stateStack.back();
 460     m_stateStack.pop_back();
 461     m_context->Restore(state);
 462 }
 463
 464 void wxGDIPlusContext::SetTextColor( const wxColour &col )
 465 {
 466     delete m_textBrush;
 467     m_textBrush = new SolidBrush( Color( col.Alpha() , col.Red() ,
 468         col.Green() , col.Blue() ));
 469 }
 470
 471 void wxGDIPlusContext::SetPen( const wxPen &pen )
 472 {
 473     m_penTransparent = pen.GetStyle() == wxTRANSPARENT;
 474     if ( m_penTransparent )
 475         return;
 476
 477     m_pen->SetColor( Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 478         pen.GetColour().Green() , pen.GetColour().Blue() ) );
 479
 480     // TODO: * m_dc->m_scaleX
 481     double penWidth = pen.GetWidth();
 482     if (penWidth <= 0.0)
 483         penWidth = 0.1;
 484
 485     m_pen->SetWidth(penWidth);
 486
 487     LineCap cap;
 488     switch ( pen.GetCap() )
 489     {
 490     case wxCAP_ROUND :
 491         cap = LineCapRound;
 492         break;
 493
 494     case wxCAP_PROJECTING :
 495         cap = LineCapSquare;
 496         break;
 497
 498     case wxCAP_BUTT :
 499         cap = LineCapFlat; // TODO verify
 500         break;
 501
 502     default :
 503         cap = LineCapFlat;
 504         break;
 505     }
 506     m_pen->SetLineCap(cap,cap, DashCapFlat);
 507
 508     LineJoin join;
 509     switch ( pen.GetJoin() )
 510     {
 511     case wxJOIN_BEVEL :
 512         join = LineJoinBevel;
 513         break;
 514
 515     case wxJOIN_MITER :
 516         join = LineJoinMiter;
 517         break;
 518
 519     case wxJOIN_ROUND :
 520         join = LineJoinRound;
 521         break;
 522
 523     default :
 524         join = LineJoinMiter;
 525         break;
 526     }
 527
 528     m_pen->SetLineJoin(join);
 529
 530     m_pen->SetDashStyle(DashStyleSolid);
 531
 532     DashStyle dashStyle = DashStyleSolid;
 533     switch ( pen.GetStyle() )
 534     {
 535     case wxSOLID :
 536         break;
 537
 538     case wxDOT :
 539         dashStyle = DashStyleDot;
 540         break;
 541
 542     case wxLONG_DASH :
 543         dashStyle = DashStyleDash; // TODO verify
 544         break;
 545
 546     case wxSHORT_DASH :
 547         dashStyle = DashStyleDash;
 548         break;
 549
 550     case wxDOT_DASH :
 551         dashStyle = DashStyleDashDot;
 552         break;
 553     case wxUSER_DASH :
 554         {
 555             dashStyle = DashStyleCustom;
 556             wxDash *dashes;
 557             int count = pen.GetDashes( &dashes );
 558             if ((dashes != NULL) && (count > 0))
 559             {
 560                 REAL *userLengths = new REAL[count];
 561                 for ( int i = 0; i < count; ++i )
 562                 {
 563                     userLengths[i] = dashes[i];
 564                 }
 565                 m_pen->SetDashPattern( userLengths, count);
 566                 delete[] userLengths;
 567             }
 568         }
 569         break;
 570     case wxSTIPPLE :
 571         {
 572             wxBitmap* bmp = pen.GetStipple();
 573             if ( bmp && bmp->Ok() )
 574             {
 575                 wxDELETE( m_penImage );
 576                 wxDELETE( m_penBrush );
 577                 m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 578                 m_penBrush = new TextureBrush(m_penImage);
 579                 m_pen->SetBrush( m_penBrush );
 580             }
 581
 582         }
 583         break;
 584     default :
 585         if ( pen.GetStyle() >= wxFIRST_HATCH && pen.GetStyle() <= wxLAST_HATCH )
 586         {
 587             wxDELETE( m_penBrush );
 588             HatchStyle style = HatchStyleHorizontal;
 589             switch( pen.GetStyle() )
 590             {
 591             case wxBDIAGONAL_HATCH :
 592                 style = HatchStyleBackwardDiagonal;
 593                 break ;
 594             case wxCROSSDIAG_HATCH :
 595                 style = HatchStyleDiagonalCross;
 596                 break ;
 597             case wxFDIAGONAL_HATCH :
 598                 style = HatchStyleForwardDiagonal;
 599                 break ;
 600             case wxCROSS_HATCH :
 601                 style = HatchStyleCross;
 602                 break ;
 603             case wxHORIZONTAL_HATCH :
 604                 style = HatchStyleHorizontal;
 605                 break ;
 606             case wxVERTICAL_HATCH :
 607                 style = HatchStyleVertical;
 608                 break ;
 609
 610             }
 611             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 612                 pen.GetColour().Green() , pen.GetColour().Blue() ), Color::Transparent );
 613             m_pen->SetBrush( m_penBrush );
 614         }
 615         break;
 616     }
 617     if ( dashStyle != DashStyleSolid )
 618         m_pen->SetDashStyle(dashStyle);
 619 }
 620
 621 void wxGDIPlusContext::SetBrush( const wxBrush &brush )
 622 {
 623 //    m_brush = brush;
 624     if ( m_context == NULL )
 625         return;
 626
 627     m_brushTransparent = brush.GetStyle() == wxTRANSPARENT;
 628
 629     if ( m_brushTransparent )
 630         return;
 631
 632     wxDELETE(m_brush);
 633
 634     if ( brush.GetStyle() == wxSOLID)
 635     {
 636         m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 637             brush.GetColour().Green() , brush.GetColour().Blue() ) );
 638     }
 639     else if ( brush.IsHatch() )
 640     {
 641         HatchStyle style = HatchStyleHorizontal;
 642         switch( brush.GetStyle() )
 643         {
 644         case wxBDIAGONAL_HATCH :
 645             style = HatchStyleBackwardDiagonal;
 646             break ;
 647         case wxCROSSDIAG_HATCH :
 648             style = HatchStyleDiagonalCross;
 649             break ;
 650         case wxFDIAGONAL_HATCH :
 651             style = HatchStyleForwardDiagonal;
 652             break ;
 653         case wxCROSS_HATCH :
 654             style = HatchStyleCross;
 655             break ;
 656         case wxHORIZONTAL_HATCH :
 657             style = HatchStyleHorizontal;
 658             break ;
 659         case wxVERTICAL_HATCH :
 660             style = HatchStyleVertical;
 661             break ;
 662
 663         }
 664         m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 665             brush.GetColour().Green() , brush.GetColour().Blue() ), Color::Transparent );
 666     }
 667     else
 668     {
 669         wxBitmap* bmp = brush.GetStipple();
 670         if ( bmp && bmp->Ok() )
 671         {
 672             wxDELETE( m_brushImage );
 673             m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 674             m_brush = new TextureBrush(m_brushImage);
 675         }
 676     }
 677 }
 678
 679 void wxGDIPlusContext::SetLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2)
 680 {
 681     m_brushTransparent = false ;
 682
 683     wxDELETE(m_brush);
 684
 685     m_brush = new LinearGradientBrush( PointF( x1,y1) , PointF( x2,y2),
 686         Color( c1.Alpha(), c1.Red(),c1.Green() , c1.Blue() ),
 687         Color( c2.Alpha(), c2.Red(),c2.Green() , c2.Blue() ));
 688 }
 689
 690 void wxGDIPlusContext::SetRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 691                                     const wxColour &oColor, const wxColour &cColor)
 692 {
 693     m_brushTransparent = false ;
 694
 695     wxDELETE(m_brush);
 696     wxDELETE(m_brushPath);
 697
 698     // Create a path that consists of a single circle.
 699     m_brushPath = new GraphicsPath();
 700     m_brushPath->AddEllipse( (REAL)(xc-radius), (REAL)(yc-radius), (REAL)(2*radius), (REAL)(2*radius));
 701
 702     PathGradientBrush *b = new PathGradientBrush(m_brushPath);
 703     m_brush = b;
 704     b->SetCenterPoint( PointF(xo,yo));
 705     b->SetCenterColor(Color( oColor.Alpha(), oColor.Red(),oColor.Green() , oColor.Blue() ));
 706
 707     Color colors[] = {Color( cColor.Alpha(), cColor.Red(),cColor.Green() , cColor.Blue() )};
 708     int count = 1;
 709     b->SetSurroundColors(colors, &count);
 710 }
 711
 712 // the built-in conversions functions create non-premultiplied bitmaps, while GDIPlus needs them in the
 713 // premultiplied format, therefore in the failing cases we create a new bitmap using the non-premultiplied
 714 // bytes as parameter
 715
 716 void wxGDIPlusContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 717 {
 718     Bitmap* image = NULL;
 719     Bitmap* helper = NULL;
 720     if ( bmp.GetMask() )
 721     {
 722         Bitmap interim((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE()) ;
 723
 724         size_t width = interim.GetWidth();
 725         size_t height = interim.GetHeight();
 726         Rect bounds(0,0,width,height);
 727
 728         image = new Bitmap(width,height,PixelFormat32bppPARGB) ;
 729
 730         Bitmap interimMask((HBITMAP)bmp.GetMask()->GetMaskBitmap(),NULL);
 731         wxASSERT(interimMask.GetPixelFormat() == PixelFormat1bppIndexed);
 732
 733         BitmapData dataMask ;
 734         interimMask.LockBits(&bounds,ImageLockModeRead,
 735             interimMask.GetPixelFormat(),&dataMask);
 736
 737
 738         BitmapData imageData ;
 739         image->LockBits(&bounds,ImageLockModeWrite, PixelFormat32bppPARGB, &imageData);
 740
 741         BYTE maskPattern = 0 ;
 742         BYTE maskByte = 0;
 743         size_t maskIndex ;
 744
 745         for ( size_t y = 0 ; y < height ; ++y)
 746         {
 747             maskIndex = 0 ;
 748             for( size_t x = 0 ; x < width; ++x)
 749             {
 750                 if ( x % 8 == 0)
 751                 {
 752                     maskPattern = 0x80;
 753                     maskByte = *((BYTE*)dataMask.Scan0 + dataMask.Stride*y + maskIndex);
 754                     maskIndex++;
 755                 }
 756                 else
 757                     maskPattern = maskPattern >> 1;
 758
 759                 ARGB *dest = (ARGB*)((BYTE*)imageData.Scan0 + imageData.Stride*y + x*4);
 760                 if ( (maskByte & maskPattern) == 0 )
 761                     *dest = 0x00000000;
 762                 else
 763                 {
 764                     Color c ;
 765                     interim.GetPixel(x,y,&c) ;
 766                     *dest = (c.GetValue() | Color::AlphaMask);
 767                 }
 768             }
 769         }
 770
 771         image->UnlockBits(&imageData);
 772
 773         interimMask.UnlockBits(&dataMask);
 774         interim.UnlockBits(&dataMask);
 775     }
 776     else
 777     {
 778         image = Bitmap::FromHBITMAP((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE());
 779         if ( GetPixelFormatSize(image->GetPixelFormat()) == 32 )
 780         {
 781             size_t width = image->GetWidth();
 782             size_t height = image->GetHeight();
 783             Rect bounds(0,0,width,height);
 784             BitmapData data ;
 785
 786             helper = image ;
 787             image = NULL ;
 788             helper->LockBits(&bounds, ImageLockModeRead,
 789                 helper->GetPixelFormat(),&data);
 790
 791             image = new Bitmap(data.Width, data.Height, data.Stride,
 792                 PixelFormat32bppARGB , (BYTE*) data.Scan0);
 793
 794             helper->UnlockBits(&data);
 795         }
 796     }
 797     if ( image )
 798         m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
 799     delete image ;
 800     delete helper ;
 801 }
 802
 803 void wxGDIPlusContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 804 {
 805     HICON hIcon = (HICON)icon.GetHICON();
 806     ICONINFO iconInfo ;
 807     // IconInfo creates the bitmaps for color and mask, we must dispose of them after use
 808     if (!GetIconInfo(hIcon,&iconInfo))
 809         return;
 810
 811     BITMAP iconBmpData ;
 812     GetObject(iconInfo.hbmColor,sizeof(BITMAP),&iconBmpData);
 813     Bitmap interim(iconInfo.hbmColor,NULL);
 814
 815     Bitmap* image = NULL ;
 816
 817     if( GetPixelFormatSize(interim.GetPixelFormat())!= 32 )
 818     {
 819         image = Bitmap::FromHICON(hIcon);
 820     }
 821     else
 822     {
 823         size_t width = interim.GetWidth();
 824         size_t height = interim.GetHeight();
 825         Rect bounds(0,0,width,height);
 826         BitmapData data ;
 827
 828         interim.LockBits(&bounds, ImageLockModeRead,
 829             interim.GetPixelFormat(),&data);
 830         image = new Bitmap(data.Width, data.Height, data.Stride,
 831             PixelFormat32bppARGB , (BYTE*) data.Scan0);
 832         interim.UnlockBits(&data);
 833     }
 834
 835     m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
 836
 837     delete image ;
 838     DeleteObject(iconInfo.hbmColor);
 839     DeleteObject(iconInfo.hbmMask);
 840 }
 841
 842
 843 void wxGDIPlusContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
 844 {
 845     if ( str.IsEmpty())
 846         return ;
 847
 848     wxWCharBuffer s = str.wc_str( *wxConvUI );
 849     m_context->DrawString( s , -1 , m_font , PointF( x , y ) , m_textBrush );
 850     // TODO m_backgroundMode == wxSOLID
 851 }
 852
 853 void wxGDIPlusContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 854                                      wxDouble *descent, wxDouble *externalLeading ) const
 855 {
 856     wxWCharBuffer s = str.wc_str( *wxConvUI );
 857     FontFamily ffamily ;
 858
 859     m_font->GetFamily(&ffamily) ;
 860
 861     REAL factorY = m_context->GetDpiY() / 72.0 ;
 862
 863     REAL rDescent = ffamily.GetCellDescent(FontStyleRegular) *
 864         m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 865     REAL rAscent = ffamily.GetCellAscent(FontStyleRegular) *
 866         m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 867     REAL rHeight = ffamily.GetLineSpacing(FontStyleRegular) *
 868         m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 869
 870     if ( height )
 871         *height = rHeight * factorY + 0.5 ;
 872     if ( descent )
 873         *descent = rDescent * factorY + 0.5 ;
 874     if ( externalLeading )
 875         *externalLeading = (rHeight - rAscent - rDescent) * factorY + 0.5 ;
 876     // measuring empty strings is not guaranteed, so do it by hand
 877     if ( str.IsEmpty())
 878     {
 879         if ( width )
 880             *width = 0 ;
 881     }
 882     else
 883     {
 884         // MeasureString does return a rectangle that is way too large, so it is
 885         // not usable here
 886         RectF layoutRect(0,0, 100000.0f, 100000.0f);
 887         StringFormat strFormat;
 888         CharacterRange strRange(0,wcslen(s));
 889         strFormat.SetMeasurableCharacterRanges(1,&strRange);
 890         Region region ;
 891         m_context->MeasureCharacterRanges(s, -1 , m_font,layoutRect, &strFormat,1,&region) ;
 892         RectF bbox ;
 893         region.GetBounds(&bbox,m_context);
 894         if ( width )
 895             *width = bbox.GetRight()-bbox.GetLeft()+0.5;
 896     }
 897 }
 898
 899 void wxGDIPlusContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
 900 {
 901     widths.Empty();
 902     widths.Add(0, text.length());
 903
 904     if (text.empty())
 905         return;
 906
 907     wxWCharBuffer ws = text.wc_str( *wxConvUI );
 908     size_t len = wcslen( ws ) ;
 909     wxASSERT_MSG(text.length() == len , wxT("GetPartialTextExtents not yet implemented for multichar situations"));
 910
 911     RectF layoutRect(0,0, 100000.0f, 100000.0f);
 912     StringFormat strFormat;
 913
 914     CharacterRange* ranges = new CharacterRange[len] ;
 915     Region* regions = new Region[len];
 916     for( size_t i = 0 ; i < len ; ++i)
 917     {
 918         ranges[i].First = i ;
 919         ranges[i].Length = 1 ;
 920     }
 921     strFormat.SetMeasurableCharacterRanges(len,ranges);
 922     m_context->MeasureCharacterRanges(ws, -1 , m_font,layoutRect, &strFormat,1,regions) ;
 923
 924     RectF bbox ;
 925     for ( size_t i = 0 ; i < len ; ++i)
 926     {
 927         regions[i].GetBounds(&bbox,m_context);
 928         widths[i] = bbox.GetRight()-bbox.GetLeft();
 929     }
 930 }
 931
 932 void wxGDIPlusContext::SetFont( const wxFont &font )
 933 {
 934     wxASSERT( font.Ok());
 935     delete m_font;
 936     wxWCharBuffer s = font.GetFaceName().wc_str( *wxConvUI );
 937     int size = font.GetPointSize();
 938     int style = FontStyleRegular;
 939     if ( font.GetStyle() == wxFONTSTYLE_ITALIC )
 940         style |= FontStyleItalic;
 941     if ( font.GetUnderlined() )
 942         style |= FontStyleUnderline;
 943     if ( font.GetWeight() == wxFONTWEIGHT_BOLD )
 944         style |= FontStyleBold;
 945     m_font = new Font( s , size , style );
 946 }
 947
 948 void * wxCairoContext::GetNativeContext()
 949 {
 950         return m_context;
 951 }
 952
 953 wxGraphicsContext* wxGraphicsContext::Create( const wxWindowDC& dc)
 954 {
 955     return new wxGDIPlusContext( (HDC) dc.GetHDC() );
 956 }
 957
 958 wxGraphicsContext* wxGraphicsContext::Create( wxWindow * window )
 959 {
 960         return NULL; // TODO
 961 }
 962
 963 wxGraphicsContext* wxGraphicsContext::CreateFromNative( void * context )
 964 {
 965         return NULL; // TODO
 966 }
 967
 968
 969
 970 #endif  // wxUSE_GRAPHICS_CONTEXT