src/msw/graphics.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/mac/carbon/dccg.cpp
   3 // Purpose:     wxGCDC class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #include "wx/dc.h"
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #ifndef WX_PRECOMP
  24 #include "wx/msw/wrapcdlg.h"
  25 #include "wx/image.h"
  26 #include "wx/window.h"
  27 #include "wx/dc.h"
  28 #include "wx/utils.h"
  29 #include "wx/dialog.h"
  30 #include "wx/app.h"
  31 #include "wx/bitmap.h"
  32 #include "wx/dcmemory.h"
  33 #include "wx/log.h"
  34 #include "wx/icon.h"
  35 #include "wx/dcprint.h"
  36 #include "wx/module.h"
  37 #endif
  38
  39 #include "wx/graphics.h"
  40
  41 #include <vector>
  42
  43 using namespace std;
  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 // TODO remove this dependency (gdiplus needs the macros)
  84
  85 #ifndef max
  86 #define max(a,b)            (((a) > (b)) ? (a) : (b))
  87 #endif
  88
  89 #ifndef min
  90 #define min(a,b)            (((a) < (b)) ? (a) : (b))
  91 #endif
  92
  93 #include "gdiplus.h"
  94 using namespace Gdiplus;
  95
  96 class GDILoader
  97 {
  98 public :
  99     GDILoader()
 100     {
 101         m_loaded = false;
 102         m_gditoken = NULL;
 103     }
 104
 105     ~GDILoader()
 106     {
 107         if (m_loaded)
 108         {
 109             Unload();
 110         }
 111     }
 112     void EnsureIsLoaded()
 113     {
 114         if (!m_loaded)
 115         {
 116             Load();
 117         }
 118     }
 119     void Load()
 120     {
 121         GdiplusStartupInput input;
 122         GdiplusStartupOutput output;
 123         GdiplusStartup(&m_gditoken,&input,&output);
 124         m_loaded = true;
 125     }
 126     void Unload()
 127     {
 128         if ( m_gditoken )
 129             GdiplusShutdown(m_gditoken);
 130     }
 131 private :
 132     bool m_loaded;
 133     DWORD m_gditoken;
 134
 135 };
 136
 137 static GDILoader gGDILoader;
 138
 139 class WXDLLEXPORT wxGDIPlusPath : public wxGraphicsPath
 140 {
 141     DECLARE_NO_COPY_CLASS(wxGDIPlusPath)
 142 public :
 143     wxGDIPlusPath();
 144     ~wxGDIPlusPath();
 145
 146
 147     //
 148     // These are the path primitives from which everything else can be constructed
 149     //
 150
 151     // begins a new subpath at (x,y)
 152     virtual void MoveToPoint( wxDouble x, wxDouble y );
 153
 154     // adds a straight line from the current point to (x,y)
 155     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 156
 157     // adds a cubic Bezier curve from the current point, using two control points and an end point
 158     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 159
 160
 161     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 162     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 163
 164     // gets the last point of the current path, (0,0) if not yet set
 165     virtual void GetCurrentPoint( wxDouble& x, wxDouble&y) ;
 166
 167     // closes the current sub-path
 168     virtual void CloseSubpath();
 169
 170     //
 171     // These are convenience functions which - if not available natively will be assembled
 172     // using the primitives from above
 173     //
 174
 175     // appends a rectangle as a new closed subpath
 176     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 177     /*
 178
 179     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 180     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 181
 182     // 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)
 183     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 184 */
 185
 186     GraphicsPath* GetPath() const;
 187 private :
 188     GraphicsPath* m_path;
 189 };
 190
 191 class WXDLLEXPORT wxGDIPlusContext : public wxGraphicsContext
 192 {
 193     DECLARE_NO_COPY_CLASS(wxGDIPlusContext)
 194
 195 public:
 196     wxGDIPlusContext( WXHDC hdc );
 197     wxGDIPlusContext();
 198     virtual ~wxGDIPlusContext();
 199
 200     virtual void Clip( const wxRegion &region );
 201     virtual void StrokePath( const wxGraphicsPath *p );
 202     virtual void FillPath( const wxGraphicsPath *p , int fillStyle = wxWINDING_RULE );
 203
 204     virtual wxGraphicsPath* CreatePath();
 205     virtual void SetPen( const wxPen &pen );
 206     virtual void SetBrush( const wxBrush &brush );
 207     virtual void SetLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2) ;
 208     virtual void SetRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 209         const wxColour &oColor, const wxColour &cColor);
 210
 211     virtual void Translate( wxDouble dx , wxDouble dy );
 212     virtual void Scale( wxDouble xScale , wxDouble yScale );
 213     virtual void Rotate( wxDouble angle );
 214
 215     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 216     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 217     virtual void PushState();
 218     virtual void PopState();
 219
 220     virtual void SetFont( const wxFont &font );
 221     virtual void SetTextColor( const wxColour &col );
 222     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y);
 223     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 224         wxDouble *descent, wxDouble *externalLeading ) const;
 225     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 226
 227 private:
 228     Graphics* m_context;
 229     vector<GraphicsState> m_stateStack;
 230     GraphicsState m_state1;
 231     GraphicsState m_state2;
 232
 233     Pen* m_pen;
 234     bool m_penTransparent;
 235     Image* m_penImage;
 236     Brush* m_penBrush;
 237
 238     Brush* m_brush;
 239     bool m_brushTransparent;
 240     Image* m_brushImage;
 241     GraphicsPath* m_brushPath;
 242
 243     Brush* m_textBrush;
 244     Font* m_font;
 245     // wxPen m_pen;
 246     // wxBrush m_brush;
 247 };
 248
 249 wxGDIPlusPath::wxGDIPlusPath()
 250 {
 251     m_path = new GraphicsPath();
 252 }
 253
 254 wxGDIPlusPath::~wxGDIPlusPath()
 255 {
 256     delete m_path;
 257 }
 258
 259 GraphicsPath* wxGDIPlusPath::GetPath() const
 260 {
 261     return m_path;
 262 }
 263
 264 //
 265 // The Primitives
 266 //
 267
 268 void wxGDIPlusPath::MoveToPoint( wxDouble x , wxDouble y )
 269 {
 270     m_path->StartFigure();
 271     m_path->AddLine((REAL) x,(REAL) y,(REAL) x,(REAL) y);
 272 }
 273
 274 void wxGDIPlusPath::AddLineToPoint( wxDouble x , wxDouble y )
 275 {
 276     m_path->AddLine((REAL) x,(REAL) y,(REAL) x,(REAL) y);
 277 }
 278
 279 void wxGDIPlusPath::CloseSubpath()
 280 {
 281     m_path->CloseFigure();
 282 }
 283
 284 void wxGDIPlusPath::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 285 {
 286     PointF c1(cx1,cy1);
 287     PointF c2(cx2,cy2);
 288     PointF end(x,y);
 289     PointF start;
 290     m_path->GetLastPoint(&start);
 291     m_path->AddBezier(start,c1,c2,end);
 292 }
 293
 294 // gets the last point of the current path, (0,0) if not yet set
 295 void wxGDIPlusPath::GetCurrentPoint( wxDouble& x, wxDouble&y)
 296 {
 297     PointF start;
 298     m_path->GetLastPoint(&start);
 299     x = start.X ;
 300     y = start.Y ;
 301 }
 302
 303 void wxGDIPlusPath::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 304 {
 305     double sweepAngle = endAngle - startAngle ;
 306     if( abs(sweepAngle) >= 2*M_PI)
 307     {
 308         sweepAngle = 2 * M_PI;
 309     }
 310     else
 311     {
 312         if ( clockwise )
 313         {
 314             if( sweepAngle < 0 )
 315                 sweepAngle += 2 * M_PI;
 316         }
 317         else
 318         {
 319             if( sweepAngle > 0 )
 320                 sweepAngle -= 2 * M_PI;
 321
 322         }
 323    }
 324    m_path->AddArc((REAL) (x-r),(REAL) (y-r),(REAL) (2*r),(REAL) (2*r),RadToDeg(startAngle),RadToDeg(sweepAngle));
 325 }
 326
 327 void wxGDIPlusPath::AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 328 {
 329     m_path->AddRectangle(RectF(x,y,w,h));
 330 }
 331
 332 //
 333 //
 334 //
 335 /*
 336 // closes the current subpath
 337 void wxGDIPlusPath::AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )
 338 {
 339 //    CGPathAddArcToPoint( m_path, NULL , x1, y1, x2, y2, r);
 340 }
 341
 342 */
 343
 344 //-----------------------------------------------------------------------------
 345 // wxGDIPlusContext implementation
 346 //-----------------------------------------------------------------------------
 347
 348 wxGDIPlusContext::wxGDIPlusContext( WXHDC hdc  )
 349 {
 350     gGDILoader.EnsureIsLoaded();
 351     m_context = new Graphics( (HDC) hdc);
 352     m_state1 = m_context->Save();
 353     m_state2 = m_context->Save();
 354
 355     // set defaults
 356
 357     m_penTransparent = false;
 358     m_pen = new Pen((ARGB)Color::Black);
 359     m_penImage = NULL;
 360     m_penBrush = NULL;
 361
 362     m_brushTransparent = false;
 363     m_brush = new SolidBrush((ARGB)Color::White);
 364     m_brushImage = NULL;
 365     m_brushPath = NULL;
 366     m_textBrush = new SolidBrush((ARGB)Color::Black);
 367     m_font = new Font( L"Arial" , 9 , FontStyleRegular );
 368 }
 369
 370 wxGDIPlusContext::~wxGDIPlusContext()
 371 {
 372     if ( m_context )
 373     {
 374         m_context->Restore( m_state2 );
 375         m_context->Restore( m_state1 );
 376         delete m_context;
 377         delete m_pen;
 378         delete m_penImage;
 379         delete m_penBrush;
 380         delete m_brush;
 381         delete m_brushImage;
 382         delete m_brushPath;
 383         delete m_textBrush;
 384         delete m_font;
 385     }
 386 }
 387
 388
 389 void wxGDIPlusContext::Clip( const wxRegion & WXUNUSED(region) )
 390 {
 391 //    ClipCGContextToRegion ( m_context, &bounds , (RgnHandle) dc->m_macCurrentClipRgn );
 392 }
 393
 394 void wxGDIPlusContext::StrokePath( const wxGraphicsPath *p )
 395 {
 396     if ( m_penTransparent )
 397         return;
 398
 399     const wxGDIPlusPath* path = dynamic_cast< const wxGDIPlusPath*>( p );
 400     m_context->DrawPath( m_pen , path->GetPath() );
 401 }
 402
 403 void wxGDIPlusContext::FillPath( const wxGraphicsPath *p , int fillStyle )
 404 {
 405     if ( !m_brushTransparent )
 406     {
 407         const wxGDIPlusPath* path = dynamic_cast< const wxGDIPlusPath*>( p );
 408         path->GetPath()->SetFillMode( fillStyle == wxODDEVEN_RULE ? FillModeAlternate : FillModeWinding);
 409         m_context->FillPath( m_brush , path->GetPath() );
 410     }
 411 }
 412
 413 wxGraphicsPath* wxGDIPlusContext::CreatePath()
 414 {
 415     return new wxGDIPlusPath();
 416 }
 417
 418 void wxGDIPlusContext::Rotate( wxDouble angle )
 419 {
 420     m_context->RotateTransform( angle );
 421 }
 422
 423 void wxGDIPlusContext::Translate( wxDouble dx , wxDouble dy )
 424 {
 425     m_context->TranslateTransform( dx , dy );
 426 }
 427
 428 void wxGDIPlusContext::Scale( wxDouble xScale , wxDouble yScale )
 429 {
 430     PointF penWidth( m_pen->GetWidth(), 0);
 431     Matrix matrix ;
 432     if ( !m_penTransparent )
 433     {
 434             m_context->GetTransform(&matrix);
 435             matrix.TransformVectors(&penWidth);
 436     }
 437     m_context->ScaleTransform(xScale,yScale);
 438     if ( !m_penTransparent )
 439     {
 440         m_context->GetTransform(&matrix);
 441         matrix.Invert();
 442         matrix.TransformVectors(&penWidth) ;
 443         m_pen->SetWidth( sqrt( penWidth.X*penWidth.X  + penWidth.Y*penWidth.Y));
 444     }
 445 }
 446
 447 void wxGDIPlusContext::PushState()
 448 {
 449     GraphicsState state = m_context->Save();
 450     m_stateStack.push_back(state);
 451 }
 452
 453 void wxGDIPlusContext::PopState()
 454 {
 455     GraphicsState state = m_stateStack.back();
 456     m_stateStack.pop_back();
 457     m_context->Restore(state);
 458 }
 459
 460 void wxGDIPlusContext::SetTextColor( const wxColour &col )
 461 {
 462     delete m_textBrush;
 463     m_textBrush = new SolidBrush( Color( col.Alpha() , col.Red() ,
 464         col.Green() , col.Blue() ));
 465 }
 466
 467 void wxGDIPlusContext::SetPen( const wxPen &pen )
 468 {
 469     m_penTransparent = pen.GetStyle() == wxTRANSPARENT;
 470     if ( m_penTransparent )
 471         return;
 472
 473     m_pen->SetColor( Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 474         pen.GetColour().Green() , pen.GetColour().Blue() ) );
 475
 476     // TODO: * m_dc->m_scaleX
 477     double penWidth = pen.GetWidth();
 478     if (penWidth <= 0.0)
 479         penWidth = 0.1;
 480
 481     m_pen->SetWidth(penWidth);
 482
 483     LineCap cap;
 484     switch ( pen.GetCap() )
 485     {
 486     case wxCAP_ROUND :
 487         cap = LineCapRound;
 488         break;
 489
 490     case wxCAP_PROJECTING :
 491         cap = LineCapSquare;
 492         break;
 493
 494     case wxCAP_BUTT :
 495         cap = LineCapFlat; // TODO verify
 496         break;
 497
 498     default :
 499         cap = LineCapFlat;
 500         break;
 501     }
 502     m_pen->SetLineCap(cap,cap, DashCapFlat);
 503
 504     LineJoin join;
 505     switch ( pen.GetJoin() )
 506     {
 507     case wxJOIN_BEVEL :
 508         join = LineJoinBevel;
 509         break;
 510
 511     case wxJOIN_MITER :
 512         join = LineJoinMiter;
 513         break;
 514
 515     case wxJOIN_ROUND :
 516         join = LineJoinRound;
 517         break;
 518
 519     default :
 520         join = LineJoinMiter;
 521         break;
 522     }
 523
 524     m_pen->SetLineJoin(join);
 525
 526     m_pen->SetDashStyle(DashStyleSolid);
 527
 528     DashStyle dashStyle = DashStyleSolid;
 529     switch ( pen.GetStyle() )
 530     {
 531     case wxSOLID :
 532         break;
 533
 534     case wxDOT :
 535         dashStyle = DashStyleDot;
 536         break;
 537
 538     case wxLONG_DASH :
 539         dashStyle = DashStyleDash; // TODO verify
 540         break;
 541
 542     case wxSHORT_DASH :
 543         dashStyle = DashStyleDash;
 544         break;
 545
 546     case wxDOT_DASH :
 547         dashStyle = DashStyleDashDot;
 548         break;
 549     case wxUSER_DASH :
 550         {
 551             dashStyle = DashStyleCustom;
 552             wxDash *dashes;
 553             int count = pen.GetDashes( &dashes );
 554             if ((dashes != NULL) && (count > 0))
 555             {
 556                 REAL *userLengths = new REAL[count];
 557                 for ( int i = 0; i < count; ++i )
 558                 {
 559                     userLengths[i] = dashes[i];
 560                 }
 561                 m_pen->SetDashPattern( userLengths, count);
 562                 delete[] userLengths;
 563             }
 564         }
 565         break;
 566     case wxSTIPPLE :
 567         {
 568             wxBitmap* bmp = pen.GetStipple();
 569             if ( bmp && bmp->Ok() )
 570             {
 571                 wxDELETE( m_penImage );
 572                 wxDELETE( m_penBrush );
 573                 m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 574                 m_penBrush = new TextureBrush(m_penImage);
 575                 m_pen->SetBrush( m_penBrush );
 576             }
 577
 578         }
 579         break;
 580     default :
 581         if ( pen.GetStyle() >= wxFIRST_HATCH && pen.GetStyle() <= wxLAST_HATCH )
 582         {
 583             wxDELETE( m_penBrush );
 584             HatchStyle style = HatchStyleHorizontal;
 585             switch( pen.GetStyle() )
 586             {
 587             case wxBDIAGONAL_HATCH :
 588                 style = HatchStyleBackwardDiagonal;
 589                 break ;
 590             case wxCROSSDIAG_HATCH :
 591                 style = HatchStyleDiagonalCross;
 592                 break ;
 593             case wxFDIAGONAL_HATCH :
 594                 style = HatchStyleForwardDiagonal;
 595                 break ;
 596             case wxCROSS_HATCH :
 597                 style = HatchStyleCross;
 598                 break ;
 599             case wxHORIZONTAL_HATCH :
 600                 style = HatchStyleHorizontal;
 601                 break ;
 602             case wxVERTICAL_HATCH :
 603                 style = HatchStyleVertical;
 604                 break ;
 605
 606             }
 607             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 608                 pen.GetColour().Green() , pen.GetColour().Blue() ), Color::Transparent );
 609             m_pen->SetBrush( m_penBrush );
 610         }
 611         break;
 612     }
 613     if ( dashStyle != DashStyleSolid )
 614         m_pen->SetDashStyle(dashStyle);
 615 }
 616
 617 void wxGDIPlusContext::SetBrush( const wxBrush &brush )
 618 {
 619 //    m_brush = brush;
 620     if ( m_context == NULL )
 621         return;
 622
 623     m_brushTransparent = brush.GetStyle() == wxTRANSPARENT;
 624
 625     if ( m_brushTransparent )
 626         return;
 627
 628     wxDELETE(m_brush);
 629
 630     if ( brush.GetStyle() == wxSOLID)
 631     {
 632         m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 633             brush.GetColour().Green() , brush.GetColour().Blue() ) );
 634     }
 635     else if ( brush.IsHatch() )
 636     {
 637         HatchStyle style = HatchStyleHorizontal;
 638         switch( brush.GetStyle() )
 639         {
 640         case wxBDIAGONAL_HATCH :
 641             style = HatchStyleBackwardDiagonal;
 642             break ;
 643         case wxCROSSDIAG_HATCH :
 644             style = HatchStyleDiagonalCross;
 645             break ;
 646         case wxFDIAGONAL_HATCH :
 647             style = HatchStyleForwardDiagonal;
 648             break ;
 649         case wxCROSS_HATCH :
 650             style = HatchStyleCross;
 651             break ;
 652         case wxHORIZONTAL_HATCH :
 653             style = HatchStyleHorizontal;
 654             break ;
 655         case wxVERTICAL_HATCH :
 656             style = HatchStyleVertical;
 657             break ;
 658
 659         }
 660         m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 661             brush.GetColour().Green() , brush.GetColour().Blue() ), Color::Transparent );
 662     }
 663     else
 664     {
 665         wxBitmap* bmp = brush.GetStipple();
 666         if ( bmp && bmp->Ok() )
 667         {
 668             wxDELETE( m_brushImage );
 669             m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 670             m_brush = new TextureBrush(m_brushImage);
 671         }
 672     }
 673 }
 674
 675 void wxGDIPlusContext::SetLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2)
 676 {
 677     m_brushTransparent = false ;
 678
 679     wxDELETE(m_brush);
 680
 681     m_brush = new LinearGradientBrush( PointF( x1,y1) , PointF( x2,y2),
 682         Color( c1.Alpha(), c1.Red(),c1.Green() , c1.Blue() ),
 683         Color( c2.Alpha(), c2.Red(),c2.Green() , c2.Blue() ));
 684 }
 685
 686 void wxGDIPlusContext::SetRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 687                                     const wxColour &oColor, const wxColour &cColor)
 688 {
 689     m_brushTransparent = false ;
 690
 691     wxDELETE(m_brush);
 692     wxDELETE(m_brushPath);
 693
 694     // Create a path that consists of a single circle.
 695     m_brushPath = new GraphicsPath();
 696     m_brushPath->AddEllipse( (REAL)(xc-radius), (REAL)(yc-radius), (REAL)(2*radius), (REAL)(2*radius));
 697
 698     PathGradientBrush *b = new PathGradientBrush(m_brushPath);
 699     m_brush = b;
 700     b->SetCenterPoint( PointF(xo,yo));
 701     b->SetCenterColor(Color( oColor.Alpha(), oColor.Red(),oColor.Green() , oColor.Blue() ));
 702
 703     Color colors[] = {Color( cColor.Alpha(), cColor.Red(),cColor.Green() , cColor.Blue() )};
 704     int count = 1;
 705     b->SetSurroundColors(colors, &count);
 706 }
 707
 708 void wxGDIPlusContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 709 {
 710     Bitmap* image = Bitmap::FromHBITMAP((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE());
 711     m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
 712     delete image ;
 713 }
 714
 715 void wxGDIPlusContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 716 {
 717     Bitmap* image = Bitmap::FromHICON((HICON)icon.GetHICON());
 718     m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
 719     delete image ;
 720 }
 721
 722
 723 void wxGDIPlusContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
 724 {
 725     if ( str.IsEmpty())
 726         return ;
 727
 728     wxWCharBuffer s = str.wc_str( *wxConvUI );
 729     m_context->DrawString( s , -1 , m_font , PointF( x , y ) , m_textBrush );
 730     // TODO m_backgroundMode == wxSOLID
 731 }
 732
 733 void wxGDIPlusContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 734                                      wxDouble *descent, wxDouble *externalLeading ) const
 735 {
 736     wxWCharBuffer s = str.wc_str( *wxConvUI );
 737     FontFamily ffamily ;
 738
 739     m_font->GetFamily(&ffamily) ;
 740
 741     REAL factorY = m_context->GetDpiY() / 72.0 ;
 742
 743     REAL rDescent = ffamily.GetCellDescent(FontStyleRegular) *
 744         m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 745     REAL rAscent = ffamily.GetCellAscent(FontStyleRegular) *
 746         m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 747     REAL rHeight = ffamily.GetLineSpacing(FontStyleRegular) *
 748         m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 749
 750     if ( height )
 751         *height = rHeight * factorY + 0.5 ;
 752     if ( descent )
 753         *descent = rDescent * factorY + 0.5 ;
 754     if ( externalLeading )
 755         *externalLeading = (rHeight - rAscent - rDescent) * factorY + 0.5 ;
 756     // measuring empty strings is not guaranteed, so do it by hand
 757     if ( str.IsEmpty())
 758     {
 759         if ( width )
 760             *width = 0 ;
 761     }
 762     else
 763     {
 764         // MeasureString does return a rectangle that is way too large, so it is
 765         // not usable here
 766         RectF layoutRect(0,0, 100000.0f, 100000.0f);
 767         StringFormat strFormat;
 768         CharacterRange strRange(0,wcslen(s));
 769         strFormat.SetMeasurableCharacterRanges(1,&strRange);
 770         Region region ;
 771         m_context->MeasureCharacterRanges(s, -1 , m_font,layoutRect, &strFormat,1,&region) ;
 772         RectF bbox ;
 773         region.GetBounds(&bbox,m_context);
 774         if ( width )
 775             *width = bbox.GetRight()-bbox.GetLeft()+0.5;
 776     }
 777 }
 778
 779 void wxGDIPlusContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
 780 {
 781     widths.Empty();
 782     widths.Add(0, text.length());
 783
 784     if (text.empty())
 785         return;
 786
 787     wxWCharBuffer ws = text.wc_str( *wxConvUI );
 788     size_t len = wcslen( ws ) ;
 789     wxASSERT_MSG(text.length() == len , wxT("GetPartialTextExtents not yet implemented for multichar situations"));
 790
 791     RectF layoutRect(0,0, 100000.0f, 100000.0f);
 792     StringFormat strFormat;
 793
 794     CharacterRange* ranges = new CharacterRange[len] ;
 795     Region* regions = new Region[len];
 796     for( size_t i = 0 ; i < len ; ++i)
 797     {
 798         ranges[i].First = i ;
 799         ranges[i].Length = 1 ;
 800     }
 801     strFormat.SetMeasurableCharacterRanges(len,ranges);
 802     m_context->MeasureCharacterRanges(ws, -1 , m_font,layoutRect, &strFormat,1,regions) ;
 803
 804     RectF bbox ;
 805     for ( size_t i = 0 ; i < len ; ++i)
 806     {
 807         regions[i].GetBounds(&bbox,m_context);
 808         widths[i] = bbox.GetRight()-bbox.GetLeft();
 809     }
 810 }
 811
 812 void wxGDIPlusContext::SetFont( const wxFont &font )
 813 {
 814     wxASSERT( font.Ok());
 815     delete m_font;
 816     wxWCharBuffer s = font.GetFaceName().wc_str( *wxConvUI );
 817     int size = font.GetPointSize();
 818     int style = FontStyleRegular;
 819     if ( font.GetStyle() == wxFONTSTYLE_ITALIC )
 820         style |= FontStyleItalic;
 821     if ( font.GetUnderlined() )
 822         style |= FontStyleUnderline;
 823     if ( font.GetWeight() == wxFONTWEIGHT_BOLD )
 824         style |= FontStyleBold;
 825     m_font = new Font( s , size , style );
 826 }
 827
 828 wxGraphicsContext* wxGraphicsContext::Create( const wxWindowDC& dc)
 829 {
 830     return new wxGDIPlusContext( (HDC) dc.GetHDC() );
 831 }