src/generic/graphicc.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/graphicc.cpp
   3 // Purpose:     cairo device context class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     2006-10-03
   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/image.h"
  22 #include "wx/window.h"
  23 #include "wx/dc.h"
  24 #include "wx/utils.h"
  25 #include "wx/dialog.h"
  26 #include "wx/app.h"
  27 #include "wx/bitmap.h"
  28 #include "wx/dcmemory.h"
  29 #include "wx/log.h"
  30 #include "wx/icon.h"
  31 #include "wx/dcprint.h"
  32 #include "wx/module.h"
  33 #endif
  34
  35 #include "wx/graphics.h"
  36
  37 #if wxUSE_GRAPHICS_CONTEXT
  38
  39 #include <vector>
  40
  41 using namespace std;
  42
  43 //-----------------------------------------------------------------------------
  44 // constants
  45 //-----------------------------------------------------------------------------
  46
  47 const double RAD2DEG = 180.0 / M_PI;
  48
  49 //-----------------------------------------------------------------------------
  50 // Local functions
  51 //-----------------------------------------------------------------------------
  52
  53 static inline double dmin(double a, double b)
  54 {
  55     return a < b ? a : b;
  56 }
  57 static inline double dmax(double a, double b)
  58 {
  59     return a > b ? a : b;
  60 }
  61
  62 static inline double DegToRad(double deg)
  63 {
  64     return (deg * M_PI) / 180.0;
  65 }
  66 static inline double RadToDeg(double deg)
  67 {
  68     return (deg * 180.0) / M_PI;
  69 }
  70
  71 //-----------------------------------------------------------------------------
  72 // device context implementation
  73 //
  74 // more and more of the dc functionality should be implemented by calling
  75 // the appropricate wxCairoContext, but we will have to do that step by step
  76 // also coordinate conversions should be moved to native matrix ops
  77 //-----------------------------------------------------------------------------
  78
  79 // we always stock two context states, one at entry, to be able to preserve the
  80 // state we were called with, the other one after changing to HI Graphics orientation
  81 // (this one is used for getting back clippings etc)
  82
  83 //-----------------------------------------------------------------------------
  84 // wxGraphicsPath implementation
  85 //-----------------------------------------------------------------------------
  86
  87 // TODO remove this dependency (gdiplus needs the macros)
  88
  89 #ifndef max
  90 #define max(a,b)            (((a) > (b)) ? (a) : (b))
  91 #endif
  92
  93 #ifndef min
  94 #define min(a,b)            (((a) < (b)) ? (a) : (b))
  95 #endif
  96
  97 #include <cairo.h>
  98 #include <gtk/gtk.h>
  99
 100 class WXDLLEXPORT wxCairoPath : public wxGraphicsPath
 101 {
 102     DECLARE_NO_COPY_CLASS(wxCairoPath)
 103 public :
 104     wxCairoPath();
 105     ~wxCairoPath();
 106
 107
 108     //
 109     // These are the path primitives from which everything else can be constructed
 110     //
 111
 112     // begins a new subpath at (x,y)
 113     virtual void MoveToPoint( wxDouble x, wxDouble y );
 114
 115     // adds a straight line from the current point to (x,y)
 116     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 117
 118     // adds a cubic Bezier curve from the current point, using two control points and an end point
 119     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 120
 121
 122     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 123     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 124
 125     // gets the last point of the current path, (0,0) if not yet set
 126     virtual void GetCurrentPoint( wxDouble& x, wxDouble&y) ;
 127
 128     // closes the current sub-path
 129     virtual void CloseSubpath();
 130
 131     //
 132     // These are convenience functions which - if not available natively will be assembled
 133     // using the primitives from above
 134     //
 135
 136     /*
 137
 138     // appends a rectangle as a new closed subpath
 139     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 140     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 141     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 142
 143     // 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)
 144     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 145     */
 146
 147     cairo_path_t* GetPath() const;
 148 private :
 149     cairo_t* m_pathContext;
 150 };
 151
 152 wxCairoPath::wxCairoPath()
 153 {
 154     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 155     m_pathContext = cairo_create(surface);
 156     cairo_surface_destroy (surface);
 157 }
 158
 159 wxCairoPath::~wxCairoPath()
 160 {
 161     cairo_destroy(m_pathContext);
 162 }
 163
 164 cairo_path_t* wxCairoPath::GetPath() const
 165 {
 166     return cairo_copy_path(m_pathContext) ;
 167 }
 168
 169 //
 170 // The Primitives
 171 //
 172
 173 void wxCairoPath::MoveToPoint( wxDouble x , wxDouble y )
 174 {
 175     cairo_move_to(m_pathContext,x,y);
 176 }
 177
 178 void wxCairoPath::AddLineToPoint( wxDouble x , wxDouble y )
 179 {
 180     cairo_line_to(m_pathContext,x,y);
 181 }
 182
 183 void wxCairoPath::CloseSubpath()
 184 {
 185     cairo_close_path(m_pathContext);
 186 }
 187
 188 void wxCairoPath::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 189 {
 190     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
 191 }
 192
 193 // gets the last point of the current path, (0,0) if not yet set
 194 void wxCairoPath::GetCurrentPoint( wxDouble& x, wxDouble&y)
 195 {
 196     double dx,dy;
 197     cairo_get_current_point(m_pathContext,&dx,&dy);
 198     x = dx;
 199     y = dy;
 200 }
 201
 202 void wxCairoPath::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 203 {
 204     // as clockwise means positive in our system (y pointing downwards)
 205     // TODO make this interpretation dependent of the
 206     // real device trans
 207     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
 208         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
 209     else
 210         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
 211 }
 212
 213 /*
 214 void wxCairoPath::AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 215 {
 216     m_path->AddRectangle(RectF(x,y,w,h));
 217 }
 218 */
 219 //
 220 //
 221 //
 222 /*
 223 // closes the current subpath
 224 void wxCairoPath::AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )
 225 {
 226 //    CGPathAddArcToPoint( m_path, NULL , x1, y1, x2, y2, r);
 227 }
 228
 229 */
 230
 231 class WXDLLEXPORT wxCairoContext : public wxGraphicsContext
 232 {
 233     DECLARE_NO_COPY_CLASS(wxCairoContext)
 234
 235 public:
 236     wxCairoContext( const wxWindowDC& dc );
 237     wxCairoContext();
 238     virtual ~wxCairoContext();
 239
 240     virtual void Clip( const wxRegion &region );
 241     virtual void StrokePath( const wxGraphicsPath *p );
 242     virtual void FillPath( const wxGraphicsPath *p , int fillStyle = wxWINDING_RULE );
 243
 244     virtual wxGraphicsPath* CreatePath();
 245     virtual void SetPen( const wxPen &pen );
 246     virtual void SetBrush( const wxBrush &brush );
 247     virtual void SetLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2) ;
 248     virtual void SetRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 249                                          const wxColour &oColor, const wxColour &cColor);
 250
 251     virtual void Translate( wxDouble dx , wxDouble dy );
 252     virtual void Scale( wxDouble xScale , wxDouble yScale );
 253     virtual void Rotate( wxDouble angle );
 254
 255     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 256     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 257     virtual void PushState();
 258     virtual void PopState();
 259
 260     virtual void SetFont( const wxFont &font );
 261     virtual void SetTextColor( const wxColour &col );
 262     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y);
 263     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 264                                 wxDouble *descent, wxDouble *externalLeading ) const;
 265     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 266
 267 private:
 268     cairo_t* m_context;
 269     bool m_penTransparent;
 270     bool m_brushTransparent;
 271
 272     wxPen m_pen;
 273     wxBrush m_brush;
 274     cairo_pattern_t* m_brushPattern;
 275     wxColour m_textColour;
 276 };
 277
 278
 279
 280
 281 //-----------------------------------------------------------------------------
 282 // wxCairoContext implementation
 283 //-----------------------------------------------------------------------------
 284
 285 wxCairoContext::wxCairoContext( const wxWindowDC& dc  )
 286 {
 287     m_context = gdk_cairo_create( dc.m_window ) ;
 288     PushState();
 289     PushState();
 290     m_penTransparent = true;
 291     m_brushTransparent = true;
 292     m_brushPattern = NULL ;
 293 }
 294
 295 wxCairoContext::~wxCairoContext()
 296 {
 297     if ( m_context )
 298     {
 299         PopState();
 300         PopState();
 301         cairo_destroy(m_context);
 302         if ( m_brushPattern )
 303             cairo_pattern_destroy(m_brushPattern);
 304     }
 305 }
 306
 307
 308 void wxCairoContext::Clip( const wxRegion &region )
 309 {
 310     //    ClipCGContextToRegion ( m_context, &bounds , (RgnHandle) dc->m_macCurrentClipRgn );
 311 }
 312
 313 void wxCairoContext::StrokePath( const wxGraphicsPath *p )
 314 {
 315     if ( m_penTransparent )
 316         return;
 317
 318     const wxCairoPath* path = dynamic_cast< const wxCairoPath*>( p );
 319     cairo_path_t* cp = path->GetPath() ;
 320     cairo_append_path(m_context,cp);
 321
 322     // setup pen
 323
 324     // TODO: * m_dc->m_scaleX
 325     double penWidth = m_pen.GetWidth();
 326     if (penWidth <= 0.0)
 327         penWidth = 0.1;
 328
 329     cairo_set_line_width(m_context,penWidth);
 330     cairo_set_source_rgba(m_context,m_pen.GetColour().Red()/255.0,
 331                           m_pen.GetColour().Green()/255.0, m_pen.GetColour().Blue()/255.0,m_pen.GetColour().Alpha()/255.0);
 332
 333     cairo_line_cap_t cap;
 334     switch ( m_pen.GetCap() )
 335     {
 336     case wxCAP_ROUND :
 337         cap = CAIRO_LINE_CAP_ROUND;
 338         break;
 339
 340     case wxCAP_PROJECTING :
 341         cap = CAIRO_LINE_CAP_SQUARE;
 342         break;
 343
 344     case wxCAP_BUTT :
 345         cap = CAIRO_LINE_CAP_BUTT;
 346         break;
 347
 348     default :
 349         cap = CAIRO_LINE_CAP_BUTT;
 350         break;
 351     }
 352     cairo_set_line_cap(m_context,cap);
 353
 354     cairo_line_join_t join;
 355     switch ( m_pen.GetJoin() )
 356     {
 357     case wxJOIN_BEVEL :
 358         join = CAIRO_LINE_JOIN_BEVEL;
 359         break;
 360
 361     case wxJOIN_MITER :
 362         join = CAIRO_LINE_JOIN_MITER;
 363         break;
 364
 365     case wxJOIN_ROUND :
 366         join = CAIRO_LINE_JOIN_ROUND;
 367         break;
 368
 369     default :
 370         join = CAIRO_LINE_JOIN_MITER;
 371         break;
 372     }
 373     cairo_set_line_join(m_context,join);
 374
 375     int num_dashes = 0;
 376     const double * dashes = NULL;
 377     double offset = 0.0;
 378
 379     const double dashUnit = penWidth < 1.0 ? 1.0 : penWidth;
 380
 381     double *userLengths = NULL;
 382     const double dotted[] =
 383         {
 384             dashUnit , dashUnit + 2.0
 385         };
 386     const double short_dashed[] =
 387         {
 388             9.0 , 6.0
 389         };
 390     const double dashed[] =
 391         {
 392             19.0 , 9.0
 393         };
 394     const double dotted_dashed[] =
 395         {
 396             9.0 , 6.0 , 3.0 , 3.0
 397         };
 398
 399     switch ( m_pen.GetStyle() )
 400     {
 401     case wxSOLID :
 402         break;
 403
 404     case wxDOT :
 405         dashes = dotted ;
 406         num_dashes = WXSIZEOF(dotted)
 407                      ;
 408         break;
 409
 410     case wxLONG_DASH :
 411         dashes = dotted ;
 412         num_dashes = WXSIZEOF(dashed);
 413         break;
 414
 415     case wxSHORT_DASH :
 416         dashes = dotted ;
 417         num_dashes = WXSIZEOF(short_dashed);
 418         break;
 419
 420     case wxDOT_DASH :
 421         dashes = dotted ;
 422         num_dashes = WXSIZEOF(dotted_dashed);
 423         break;
 424
 425     case wxUSER_DASH :
 426         {
 427             wxDash *wxdashes ;
 428             num_dashes = m_pen.GetDashes( &wxdashes ) ;
 429             if ((wxdashes != NULL) && (num_dashes > 0))
 430             {
 431                 userLengths = new double[num_dashes] ;
 432                 for ( int i = 0 ; i < num_dashes ; ++i )
 433                 {
 434                     userLengths[i] = wxdashes[i] * dashUnit ;
 435
 436                     if ( i % 2 == 1 && userLengths[i] < dashUnit + 2.0 )
 437                         userLengths[i] = dashUnit + 2.0 ;
 438                     else if ( i % 2 == 0 && userLengths[i] < dashUnit )
 439                         userLengths[i] = dashUnit ;
 440                 }
 441             }
 442             dashes = userLengths ;
 443         }
 444         break;
 445     case wxSTIPPLE :
 446         {
 447             /*
 448                         wxBitmap* bmp = pen.GetStipple();
 449                         if ( bmp && bmp->Ok() )
 450                         {
 451                             wxDELETE( m_penImage );
 452                             wxDELETE( m_penBrush );
 453                             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 454                             m_penBrush = new TextureBrush(m_penImage);
 455                             m_pen->SetBrush( m_penBrush );
 456                         }
 457             */
 458         }
 459         break;
 460     default :
 461         if ( m_pen.GetStyle() >= wxFIRST_HATCH && m_pen.GetStyle() <= wxLAST_HATCH )
 462         {
 463             /*
 464                         wxDELETE( m_penBrush );
 465                         HatchStyle style = HatchStyleHorizontal;
 466                         switch( pen.GetStyle() )
 467                         {
 468                         case wxBDIAGONAL_HATCH :
 469                             style = HatchStyleBackwardDiagonal;
 470                             break ;
 471                         case wxCROSSDIAG_HATCH :
 472                             style = HatchStyleDiagonalCross;
 473                             break ;
 474                         case wxFDIAGONAL_HATCH :
 475                             style = HatchStyleForwardDiagonal;
 476                             break ;
 477                         case wxCROSS_HATCH :
 478                             style = HatchStyleCross;
 479                             break ;
 480                         case wxHORIZONTAL_HATCH :
 481                             style = HatchStyleHorizontal;
 482                             break ;
 483                         case wxVERTICAL_HATCH :
 484                             style = HatchStyleVertical;
 485                             break ;
 486
 487                         }
 488                         m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 489                             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 490                         m_pen->SetBrush( m_penBrush )
 491             */
 492         }
 493         break;
 494     }
 495
 496     cairo_set_dash(m_context,(double*)dashes,num_dashes,offset);
 497     if ( userLengths )
 498         delete[] userLengths;
 499     cairo_stroke(m_context);
 500     cairo_path_destroy(cp);
 501 }
 502
 503 void wxCairoContext::FillPath( const wxGraphicsPath *p , int fillStyle )
 504 {
 505     if ( !m_brushTransparent )
 506     {
 507         const wxCairoPath* path = dynamic_cast< const wxCairoPath*>( p );
 508         cairo_path_t* cp = path->GetPath() ;
 509         cairo_append_path(m_context,cp);
 510
 511         if ( m_brushPattern )
 512         {
 513             cairo_set_source(m_context,m_brushPattern);
 514         }
 515         else
 516         {
 517             cairo_set_source_rgba(m_context,m_brush.GetColour().Red()/255.0,
 518                                   m_brush.GetColour().Green()/255.0,
 519                                   m_brush.GetColour().Blue()/255.0,
 520                                   m_brush.GetColour().Alpha()/255.0);
 521         }
 522
 523         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
 524         cairo_fill(m_context);
 525         cairo_path_destroy(cp);
 526     }
 527 }
 528
 529 wxGraphicsPath* wxCairoContext::CreatePath()
 530 {
 531     return new wxCairoPath();
 532 }
 533
 534 void wxCairoContext::Rotate( wxDouble angle )
 535 {
 536     cairo_rotate(m_context,angle);
 537 }
 538
 539 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
 540 {
 541     cairo_translate(m_context,dx,dy);
 542 }
 543
 544 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
 545 {
 546     cairo_scale(m_context,xScale,yScale);
 547     /*
 548         PointF penWidth( m_pen->GetWidth(), 0);
 549         Matrix matrix ;
 550         if ( !m_penTransparent )
 551         {
 552                 m_context->GetTransform(&matrix);
 553                 matrix.TransformVectors(&penWidth);
 554         }
 555         m_context->ScaleTransform(xScale,yScale);
 556         if ( !m_penTransparent )
 557         {
 558             m_context->GetTransform(&matrix);
 559             matrix.Invert();
 560             matrix.TransformVectors(&penWidth) ;
 561             m_pen->SetWidth( sqrt( penWidth.X*penWidth.X  + penWidth.Y*penWidth.Y));
 562         }
 563     */
 564 }
 565
 566 void wxCairoContext::PushState()
 567 {
 568     cairo_save(m_context);
 569 }
 570
 571 void wxCairoContext::PopState()
 572 {
 573     cairo_restore(m_context);
 574 }
 575
 576 void wxCairoContext::SetTextColor( const wxColour &col )
 577 {
 578     m_textColour = col;
 579 }
 580
 581 void wxCairoContext::SetPen( const wxPen &pen )
 582 {
 583     m_pen = pen ;
 584     m_penTransparent = pen.GetStyle() == wxTRANSPARENT;
 585     if ( m_penTransparent )
 586         return;
 587
 588     /*
 589
 590         case wxSTIPPLE :
 591             {
 592                 wxBitmap* bmp = pen.GetStipple();
 593                 if ( bmp && bmp->Ok() )
 594                 {
 595                     wxDELETE( m_penImage );
 596                     wxDELETE( m_penBrush );
 597                     m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 598                     m_penBrush = new TextureBrush(m_penImage);
 599                     m_pen->SetBrush( m_penBrush );
 600                 }
 601
 602             }
 603             break;
 604         default :
 605             if ( pen.GetStyle() >= wxFIRST_HATCH && pen.GetStyle() <= wxLAST_HATCH )
 606             {
 607                 wxDELETE( m_penBrush );
 608                 HatchStyle style = HatchStyleHorizontal;
 609                 switch( pen.GetStyle() )
 610                 {
 611                 case wxBDIAGONAL_HATCH :
 612                     style = HatchStyleBackwardDiagonal;
 613                     break ;
 614                 case wxCROSSDIAG_HATCH :
 615                     style = HatchStyleDiagonalCross;
 616                     break ;
 617                 case wxFDIAGONAL_HATCH :
 618                     style = HatchStyleForwardDiagonal;
 619                     break ;
 620                 case wxCROSS_HATCH :
 621                     style = HatchStyleCross;
 622                     break ;
 623                 case wxHORIZONTAL_HATCH :
 624                     style = HatchStyleHorizontal;
 625                     break ;
 626                 case wxVERTICAL_HATCH :
 627                     style = HatchStyleVertical;
 628                     break ;
 629
 630                 }
 631                 m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 632                     pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 633                 m_pen->SetBrush( m_penBrush );
 634             }
 635             break;
 636         }
 637         if ( dashStyle != DashStyleSolid )
 638             m_pen->SetDashStyle(dashStyle);
 639     */
 640 }
 641
 642 void wxCairoContext::SetBrush( const wxBrush &brush )
 643 {
 644     m_brush = brush;
 645     if (m_brushPattern)
 646     {
 647         cairo_pattern_destroy(m_brushPattern);
 648         m_brushPattern = NULL;
 649     }
 650     m_brushTransparent = brush.GetStyle() == wxTRANSPARENT;
 651
 652     if ( m_brushTransparent )
 653         return;
 654     /*
 655         wxDELETE(m_brush);
 656
 657         if ( brush.GetStyle() == wxSOLID)
 658         {
 659             m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 660                 brush.GetColour().Green() , brush.GetColour().Blue() ) );
 661         }
 662         else if ( brush.IsHatch() )
 663         {
 664             HatchStyle style = HatchStyleHorizontal;
 665             switch( brush.GetStyle() )
 666             {
 667             case wxBDIAGONAL_HATCH :
 668                 style = HatchStyleBackwardDiagonal;
 669                 break ;
 670             case wxCROSSDIAG_HATCH :
 671                 style = HatchStyleDiagonalCross;
 672                 break ;
 673             case wxFDIAGONAL_HATCH :
 674                 style = HatchStyleForwardDiagonal;
 675                 break ;
 676             case wxCROSS_HATCH :
 677                 style = HatchStyleCross;
 678                 break ;
 679             case wxHORIZONTAL_HATCH :
 680                 style = HatchStyleHorizontal;
 681                 break ;
 682             case wxVERTICAL_HATCH :
 683                 style = HatchStyleVertical;
 684                 break ;
 685
 686             }
 687             m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 688                 brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 689         }
 690         else
 691         {
 692             wxBitmap* bmp = brush.GetStipple();
 693             if ( bmp && bmp->Ok() )
 694             {
 695                 wxDELETE( m_brushImage );
 696                 m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 697                 m_brush = new TextureBrush(m_brushImage);
 698             }
 699         }
 700     */
 701 }
 702
 703 void wxCairoContext::SetLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2)
 704 {
 705     if ( m_brushPattern )
 706     {
 707         cairo_pattern_destroy(m_brushPattern);
 708         m_brushPattern=NULL;
 709     }
 710
 711     m_brushTransparent = false;
 712     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 713     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,c1.Red()/255.0,
 714                           c1.Green()/255.0, c1.Blue()/255.0,c1.Alpha()/255.0);
 715     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,c2.Red()/255.0,
 716                           c2.Green()/255.0, c2.Blue()/255.0,c2.Alpha()/255.0);
 717     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 718 }
 719
 720 void wxCairoContext::SetRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 721         const wxColour &oColor, const wxColour &cColor)
 722 {
 723    if ( m_brushPattern )
 724     {
 725         cairo_pattern_destroy(m_brushPattern);
 726         m_brushPattern=NULL;
 727     }
 728
 729     m_brushTransparent = false;
 730     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 731     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,oColor.Red()/255.0,
 732                           oColor.Green()/255.0, oColor.Blue()/255.0,oColor.Alpha()/255.0);
 733     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,cColor.Red()/255.0,
 734                           cColor.Green()/255.0, cColor.Blue()/255.0,cColor.Alpha()/255.0);
 735     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 736  }
 737
 738 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 739 {
 740     /*
 741         Bitmap* image = Bitmap::FromHBITMAP((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE());
 742         m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
 743         delete image ;
 744     */
 745 }
 746
 747 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 748 {
 749     /*
 750         Bitmap* image = Bitmap::FromHICON((HICON)icon.GetHICON());
 751         m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
 752         delete image ;
 753     */
 754 }
 755
 756
 757 void wxCairoContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
 758 {
 759     if ( str.IsEmpty())
 760         return ;
 761     cairo_move_to(m_context,x,y);
 762     const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
 763
 764     cairo_set_source_rgba(m_context,m_textColour.Red()/255.0,
 765                           m_textColour.Green()/255.0, m_textColour.Blue()/255.0,m_textColour.Alpha()/255.0);
 766     cairo_show_text(m_context,buf);
 767
 768     // TODO m_backgroundMode == wxSOLID
 769 }
 770
 771 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 772                                     wxDouble *descent, wxDouble *externalLeading ) const
 773 {
 774     /*
 775         wxWCharBuffer s = str.wc_str( *wxConvUI );
 776         FontFamily ffamily ;
 777
 778         m_font->GetFamily(&ffamily) ;
 779
 780         REAL factorY = m_context->GetDpiY() / 72.0 ;
 781
 782         REAL rDescent = ffamily.GetCellDescent(FontStyleRegular) *
 783             m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 784         REAL rAscent = ffamily.GetCellAscent(FontStyleRegular) *
 785             m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 786         REAL rHeight = ffamily.GetLineSpacing(FontStyleRegular) *
 787             m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 788
 789         if ( height )
 790             *height = rHeight * factorY + 0.5 ;
 791         if ( descent )
 792             *descent = rDescent * factorY + 0.5 ;
 793         if ( externalLeading )
 794             *externalLeading = (rHeight - rAscent - rDescent) * factorY + 0.5 ;
 795         // measuring empty strings is not guaranteed, so do it by hand
 796         if ( str.IsEmpty())
 797         {
 798             if ( width )
 799                 *width = 0 ;
 800         }
 801         else
 802         {
 803             // MeasureString does return a rectangle that is way too large, so it is
 804             // not usable here
 805             RectF layoutRect(0,0, 100000.0f, 100000.0f);
 806             StringFormat strFormat;
 807             CharacterRange strRange(0,wcslen(s));
 808             strFormat.SetMeasurableCharacterRanges(1,&strRange);
 809             Region region ;
 810             m_context->MeasureCharacterRanges(s, -1 , m_font,layoutRect, &strFormat,1,&region) ;
 811             RectF bbox ;
 812             region.GetBounds(&bbox,m_context);
 813             if ( width )
 814                 *width = bbox.GetRight()-bbox.GetLeft()+0.5;
 815         }
 816     */
 817 }
 818
 819 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
 820 {
 821     widths.Empty();
 822     widths.Add(0, text.length());
 823
 824     if (text.empty())
 825         return;
 826     /*
 827         wxWCharBuffer ws = text.wc_str( *wxConvUI );
 828         size_t len = wcslen( ws ) ;
 829         wxASSERT_MSG(text.length() == len , wxT("GetPartialTextExtents not yet implemented for multichar situations"));
 830
 831         RectF layoutRect(0,0, 100000.0f, 100000.0f);
 832         StringFormat strFormat;
 833
 834         CharacterRange* ranges = new CharacterRange[len] ;
 835         Region* regions = new Region[len];
 836         for( int i = 0 ; i < len ; ++i)
 837         {
 838             ranges[i].First = i ;
 839             ranges[i].Length = 1 ;
 840         }
 841         strFormat.SetMeasurableCharacterRanges(len,ranges);
 842         m_context->MeasureCharacterRanges(ws, -1 , m_font,layoutRect, &strFormat,1,regions) ;
 843
 844         RectF bbox ;
 845         for ( int i = 0 ; i < len ; ++i)
 846         {
 847             regions[i].GetBounds(&bbox,m_context);
 848             widths[i] = bbox.GetRight()-bbox.GetLeft();
 849         }
 850     */
 851 }
 852
 853 void wxCairoContext::SetFont( const wxFont &font )
 854 {
 855     cairo_select_font_face(m_context,font.GetFaceName().mb_str(wxConvUTF8),
 856                            font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL,
 857                            font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL);
 858
 859     cairo_set_font_size(m_context,font.GetPointSize());
 860     // TODO UNDERLINE
 861     // TODO FIX SIZE
 862 }
 863
 864 wxGraphicsContext* wxGraphicsContext::Create( const wxWindowDC& dc )
 865 {
 866     return new wxCairoContext(dc);
 867 }
 868
 869 #endif  // wxUSE_GRAPHICS_CONTEXT