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
 242     // clips drawings to the rect
 243     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 244
 245         // resets the clipping to original extent
 246         virtual void ResetClip();
 247
 248         virtual void * GetNativeContext();
 249
 250     virtual void StrokePath( const wxGraphicsPath *p );
 251     virtual void FillPath( const wxGraphicsPath *p , int fillStyle = wxWINDING_RULE );
 252
 253     virtual wxGraphicsPath* CreatePath();
 254     virtual void SetPen( const wxPen &pen );
 255     virtual void SetBrush( const wxBrush &brush );
 256     virtual void SetLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2) ;
 257     virtual void SetRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 258                                          const wxColour &oColor, const wxColour &cColor);
 259
 260     virtual void Translate( wxDouble dx , wxDouble dy );
 261     virtual void Scale( wxDouble xScale , wxDouble yScale );
 262     virtual void Rotate( wxDouble angle );
 263
 264     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 265     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 266     virtual void PushState();
 267     virtual void PopState();
 268
 269     virtual void SetFont( const wxFont &font );
 270     virtual void SetTextColor( const wxColour &col );
 271     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y);
 272     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 273                                 wxDouble *descent, wxDouble *externalLeading ) const;
 274     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 275
 276 private:
 277     cairo_t* m_context;
 278     bool m_penTransparent;
 279     bool m_brushTransparent;
 280
 281     wxPen m_pen;
 282     wxBrush m_brush;
 283     cairo_pattern_t* m_brushPattern;
 284     wxColour m_textColour;
 285 };
 286
 287
 288
 289
 290 //-----------------------------------------------------------------------------
 291 // wxCairoContext implementation
 292 //-----------------------------------------------------------------------------
 293
 294 wxCairoContext::wxCairoContext( const wxWindowDC& dc  )
 295 {
 296     m_context = gdk_cairo_create( dc.m_window ) ;
 297     PushState();
 298     PushState();
 299     m_penTransparent = true;
 300     m_brushTransparent = true;
 301     m_brushPattern = NULL ;
 302 }
 303
 304 wxCairoContext::~wxCairoContext()
 305 {
 306     if ( m_context )
 307     {
 308         PopState();
 309         PopState();
 310         cairo_destroy(m_context);
 311         if ( m_brushPattern )
 312             cairo_pattern_destroy(m_brushPattern);
 313     }
 314 }
 315
 316
 317 void wxCairoContext::Clip( const wxRegion & WXUNUSED(region) )
 318 {
 319 // TODO
 320 }
 321
 322 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 323 {
 324 // TODO
 325 }
 326
 327 void wxCairoContext::ResetClip()
 328 {
 329 // TODO
 330 }
 331
 332
 333 void wxCairoContext::StrokePath( const wxGraphicsPath *p )
 334 {
 335     if ( m_penTransparent )
 336         return;
 337
 338     const wxCairoPath* path = dynamic_cast< const wxCairoPath*>( p );
 339     cairo_path_t* cp = path->GetPath() ;
 340     cairo_append_path(m_context,cp);
 341
 342     // setup pen
 343
 344     // TODO: * m_dc->m_scaleX
 345     double penWidth = m_pen.GetWidth();
 346     if (penWidth <= 0.0)
 347         penWidth = 0.1;
 348
 349     cairo_set_line_width(m_context,penWidth);
 350     cairo_set_source_rgba(m_context,m_pen.GetColour().Red()/255.0,
 351                           m_pen.GetColour().Green()/255.0, m_pen.GetColour().Blue()/255.0,m_pen.GetColour().Alpha()/255.0);
 352
 353     cairo_line_cap_t cap;
 354     switch ( m_pen.GetCap() )
 355     {
 356     case wxCAP_ROUND :
 357         cap = CAIRO_LINE_CAP_ROUND;
 358         break;
 359
 360     case wxCAP_PROJECTING :
 361         cap = CAIRO_LINE_CAP_SQUARE;
 362         break;
 363
 364     case wxCAP_BUTT :
 365         cap = CAIRO_LINE_CAP_BUTT;
 366         break;
 367
 368     default :
 369         cap = CAIRO_LINE_CAP_BUTT;
 370         break;
 371     }
 372     cairo_set_line_cap(m_context,cap);
 373
 374     cairo_line_join_t join;
 375     switch ( m_pen.GetJoin() )
 376     {
 377     case wxJOIN_BEVEL :
 378         join = CAIRO_LINE_JOIN_BEVEL;
 379         break;
 380
 381     case wxJOIN_MITER :
 382         join = CAIRO_LINE_JOIN_MITER;
 383         break;
 384
 385     case wxJOIN_ROUND :
 386         join = CAIRO_LINE_JOIN_ROUND;
 387         break;
 388
 389     default :
 390         join = CAIRO_LINE_JOIN_MITER;
 391         break;
 392     }
 393     cairo_set_line_join(m_context,join);
 394
 395     int num_dashes = 0;
 396     const double * dashes = NULL;
 397     double offset = 0.0;
 398
 399     const double dashUnit = penWidth < 1.0 ? 1.0 : penWidth;
 400
 401     double *userLengths = NULL;
 402     const double dotted[] =
 403         {
 404             dashUnit , dashUnit + 2.0
 405         };
 406     const double short_dashed[] =
 407         {
 408             9.0 , 6.0
 409         };
 410     const double dashed[] =
 411         {
 412             19.0 , 9.0
 413         };
 414     const double dotted_dashed[] =
 415         {
 416             9.0 , 6.0 , 3.0 , 3.0
 417         };
 418
 419     switch ( m_pen.GetStyle() )
 420     {
 421     case wxSOLID :
 422         break;
 423
 424     case wxDOT :
 425         dashes = dotted ;
 426         num_dashes = WXSIZEOF(dotted)
 427                      ;
 428         break;
 429
 430     case wxLONG_DASH :
 431         dashes = dotted ;
 432         num_dashes = WXSIZEOF(dashed);
 433         break;
 434
 435     case wxSHORT_DASH :
 436         dashes = dotted ;
 437         num_dashes = WXSIZEOF(short_dashed);
 438         break;
 439
 440     case wxDOT_DASH :
 441         dashes = dotted ;
 442         num_dashes = WXSIZEOF(dotted_dashed);
 443         break;
 444
 445     case wxUSER_DASH :
 446         {
 447             wxDash *wxdashes ;
 448             num_dashes = m_pen.GetDashes( &wxdashes ) ;
 449             if ((wxdashes != NULL) && (num_dashes > 0))
 450             {
 451                 userLengths = new double[num_dashes] ;
 452                 for ( int i = 0 ; i < num_dashes ; ++i )
 453                 {
 454                     userLengths[i] = wxdashes[i] * dashUnit ;
 455
 456                     if ( i % 2 == 1 && userLengths[i] < dashUnit + 2.0 )
 457                         userLengths[i] = dashUnit + 2.0 ;
 458                     else if ( i % 2 == 0 && userLengths[i] < dashUnit )
 459                         userLengths[i] = dashUnit ;
 460                 }
 461             }
 462             dashes = userLengths ;
 463         }
 464         break;
 465     case wxSTIPPLE :
 466         {
 467             /*
 468                         wxBitmap* bmp = pen.GetStipple();
 469                         if ( bmp && bmp->Ok() )
 470                         {
 471                             wxDELETE( m_penImage );
 472                             wxDELETE( m_penBrush );
 473                             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 474                             m_penBrush = new TextureBrush(m_penImage);
 475                             m_pen->SetBrush( m_penBrush );
 476                         }
 477             */
 478         }
 479         break;
 480     default :
 481         if ( m_pen.GetStyle() >= wxFIRST_HATCH && m_pen.GetStyle() <= wxLAST_HATCH )
 482         {
 483             /*
 484                         wxDELETE( m_penBrush );
 485                         HatchStyle style = HatchStyleHorizontal;
 486                         switch( pen.GetStyle() )
 487                         {
 488                         case wxBDIAGONAL_HATCH :
 489                             style = HatchStyleBackwardDiagonal;
 490                             break ;
 491                         case wxCROSSDIAG_HATCH :
 492                             style = HatchStyleDiagonalCross;
 493                             break ;
 494                         case wxFDIAGONAL_HATCH :
 495                             style = HatchStyleForwardDiagonal;
 496                             break ;
 497                         case wxCROSS_HATCH :
 498                             style = HatchStyleCross;
 499                             break ;
 500                         case wxHORIZONTAL_HATCH :
 501                             style = HatchStyleHorizontal;
 502                             break ;
 503                         case wxVERTICAL_HATCH :
 504                             style = HatchStyleVertical;
 505                             break ;
 506
 507                         }
 508                         m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 509                             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 510                         m_pen->SetBrush( m_penBrush )
 511             */
 512         }
 513         break;
 514     }
 515
 516     cairo_set_dash(m_context,(double*)dashes,num_dashes,offset);
 517     if ( userLengths )
 518         delete[] userLengths;
 519     cairo_stroke(m_context);
 520     cairo_path_destroy(cp);
 521 }
 522
 523 void wxCairoContext::FillPath( const wxGraphicsPath *p , int fillStyle )
 524 {
 525     if ( !m_brushTransparent )
 526     {
 527         const wxCairoPath* path = dynamic_cast< const wxCairoPath*>( p );
 528         cairo_path_t* cp = path->GetPath() ;
 529         cairo_append_path(m_context,cp);
 530
 531         if ( m_brushPattern )
 532         {
 533             cairo_set_source(m_context,m_brushPattern);
 534         }
 535         else
 536         {
 537             cairo_set_source_rgba(m_context,m_brush.GetColour().Red()/255.0,
 538                                   m_brush.GetColour().Green()/255.0,
 539                                   m_brush.GetColour().Blue()/255.0,
 540                                   m_brush.GetColour().Alpha()/255.0);
 541         }
 542
 543         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
 544         cairo_fill(m_context);
 545         cairo_path_destroy(cp);
 546     }
 547 }
 548
 549 wxGraphicsPath* wxCairoContext::CreatePath()
 550 {
 551     return new wxCairoPath();
 552 }
 553
 554 void wxCairoContext::Rotate( wxDouble angle )
 555 {
 556     cairo_rotate(m_context,angle);
 557 }
 558
 559 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
 560 {
 561     cairo_translate(m_context,dx,dy);
 562 }
 563
 564 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
 565 {
 566     cairo_scale(m_context,xScale,yScale);
 567     /*
 568         PointF penWidth( m_pen->GetWidth(), 0);
 569         Matrix matrix ;
 570         if ( !m_penTransparent )
 571         {
 572                 m_context->GetTransform(&matrix);
 573                 matrix.TransformVectors(&penWidth);
 574         }
 575         m_context->ScaleTransform(xScale,yScale);
 576         if ( !m_penTransparent )
 577         {
 578             m_context->GetTransform(&matrix);
 579             matrix.Invert();
 580             matrix.TransformVectors(&penWidth) ;
 581             m_pen->SetWidth( sqrt( penWidth.X*penWidth.X  + penWidth.Y*penWidth.Y));
 582         }
 583     */
 584 }
 585
 586 void wxCairoContext::PushState()
 587 {
 588     cairo_save(m_context);
 589 }
 590
 591 void wxCairoContext::PopState()
 592 {
 593     cairo_restore(m_context);
 594 }
 595
 596 void wxCairoContext::SetTextColor( const wxColour &col )
 597 {
 598     m_textColour = col;
 599 }
 600
 601 void wxCairoContext::SetPen( const wxPen &pen )
 602 {
 603     m_pen = pen ;
 604     m_penTransparent = pen.GetStyle() == wxTRANSPARENT;
 605     if ( m_penTransparent )
 606         return;
 607
 608     /*
 609
 610         case wxSTIPPLE :
 611             {
 612                 wxBitmap* bmp = pen.GetStipple();
 613                 if ( bmp && bmp->Ok() )
 614                 {
 615                     wxDELETE( m_penImage );
 616                     wxDELETE( m_penBrush );
 617                     m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 618                     m_penBrush = new TextureBrush(m_penImage);
 619                     m_pen->SetBrush( m_penBrush );
 620                 }
 621
 622             }
 623             break;
 624         default :
 625             if ( pen.GetStyle() >= wxFIRST_HATCH && pen.GetStyle() <= wxLAST_HATCH )
 626             {
 627                 wxDELETE( m_penBrush );
 628                 HatchStyle style = HatchStyleHorizontal;
 629                 switch( pen.GetStyle() )
 630                 {
 631                 case wxBDIAGONAL_HATCH :
 632                     style = HatchStyleBackwardDiagonal;
 633                     break ;
 634                 case wxCROSSDIAG_HATCH :
 635                     style = HatchStyleDiagonalCross;
 636                     break ;
 637                 case wxFDIAGONAL_HATCH :
 638                     style = HatchStyleForwardDiagonal;
 639                     break ;
 640                 case wxCROSS_HATCH :
 641                     style = HatchStyleCross;
 642                     break ;
 643                 case wxHORIZONTAL_HATCH :
 644                     style = HatchStyleHorizontal;
 645                     break ;
 646                 case wxVERTICAL_HATCH :
 647                     style = HatchStyleVertical;
 648                     break ;
 649
 650                 }
 651                 m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 652                     pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 653                 m_pen->SetBrush( m_penBrush );
 654             }
 655             break;
 656         }
 657         if ( dashStyle != DashStyleSolid )
 658             m_pen->SetDashStyle(dashStyle);
 659     */
 660 }
 661
 662 void wxCairoContext::SetBrush( const wxBrush &brush )
 663 {
 664     m_brush = brush;
 665     if (m_brushPattern)
 666     {
 667         cairo_pattern_destroy(m_brushPattern);
 668         m_brushPattern = NULL;
 669     }
 670     m_brushTransparent = brush.GetStyle() == wxTRANSPARENT;
 671
 672     if ( m_brushTransparent )
 673         return;
 674     /*
 675         wxDELETE(m_brush);
 676
 677         if ( brush.GetStyle() == wxSOLID)
 678         {
 679             m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 680                 brush.GetColour().Green() , brush.GetColour().Blue() ) );
 681         }
 682         else if ( brush.IsHatch() )
 683         {
 684             HatchStyle style = HatchStyleHorizontal;
 685             switch( brush.GetStyle() )
 686             {
 687             case wxBDIAGONAL_HATCH :
 688                 style = HatchStyleBackwardDiagonal;
 689                 break ;
 690             case wxCROSSDIAG_HATCH :
 691                 style = HatchStyleDiagonalCross;
 692                 break ;
 693             case wxFDIAGONAL_HATCH :
 694                 style = HatchStyleForwardDiagonal;
 695                 break ;
 696             case wxCROSS_HATCH :
 697                 style = HatchStyleCross;
 698                 break ;
 699             case wxHORIZONTAL_HATCH :
 700                 style = HatchStyleHorizontal;
 701                 break ;
 702             case wxVERTICAL_HATCH :
 703                 style = HatchStyleVertical;
 704                 break ;
 705
 706             }
 707             m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 708                 brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 709         }
 710         else
 711         {
 712             wxBitmap* bmp = brush.GetStipple();
 713             if ( bmp && bmp->Ok() )
 714             {
 715                 wxDELETE( m_brushImage );
 716                 m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 717                 m_brush = new TextureBrush(m_brushImage);
 718             }
 719         }
 720     */
 721 }
 722
 723 void wxCairoContext::SetLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2)
 724 {
 725     if ( m_brushPattern )
 726     {
 727         cairo_pattern_destroy(m_brushPattern);
 728         m_brushPattern=NULL;
 729     }
 730
 731     m_brushTransparent = false;
 732     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 733     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,c1.Red()/255.0,
 734                           c1.Green()/255.0, c1.Blue()/255.0,c1.Alpha()/255.0);
 735     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,c2.Red()/255.0,
 736                           c2.Green()/255.0, c2.Blue()/255.0,c2.Alpha()/255.0);
 737     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 738 }
 739
 740 void wxCairoContext::SetRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 741         const wxColour &oColor, const wxColour &cColor)
 742 {
 743    if ( m_brushPattern )
 744     {
 745         cairo_pattern_destroy(m_brushPattern);
 746         m_brushPattern=NULL;
 747     }
 748
 749     m_brushTransparent = false;
 750     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 751     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,oColor.Red()/255.0,
 752                           oColor.Green()/255.0, oColor.Blue()/255.0,oColor.Alpha()/255.0);
 753     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,cColor.Red()/255.0,
 754                           cColor.Green()/255.0, cColor.Blue()/255.0,cColor.Alpha()/255.0);
 755     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 756  }
 757
 758 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 759 {
 760     /*
 761         Bitmap* image = Bitmap::FromHBITMAP((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE());
 762         m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
 763         delete image ;
 764     */
 765 }
 766
 767 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 768 {
 769     /*
 770         Bitmap* image = Bitmap::FromHICON((HICON)icon.GetHICON());
 771         m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
 772         delete image ;
 773     */
 774 }
 775
 776
 777 void wxCairoContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
 778 {
 779     if ( str.IsEmpty())
 780         return ;
 781     cairo_move_to(m_context,x,y);
 782     const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
 783
 784     cairo_set_source_rgba(m_context,m_textColour.Red()/255.0,
 785                           m_textColour.Green()/255.0, m_textColour.Blue()/255.0,m_textColour.Alpha()/255.0);
 786     cairo_show_text(m_context,buf);
 787
 788     // TODO m_backgroundMode == wxSOLID
 789 }
 790
 791 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 792                                     wxDouble *descent, wxDouble *externalLeading ) const
 793 {
 794     /*
 795         wxWCharBuffer s = str.wc_str( *wxConvUI );
 796         FontFamily ffamily ;
 797
 798         m_font->GetFamily(&ffamily) ;
 799
 800         REAL factorY = m_context->GetDpiY() / 72.0 ;
 801
 802         REAL rDescent = ffamily.GetCellDescent(FontStyleRegular) *
 803             m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 804         REAL rAscent = ffamily.GetCellAscent(FontStyleRegular) *
 805             m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 806         REAL rHeight = ffamily.GetLineSpacing(FontStyleRegular) *
 807             m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
 808
 809         if ( height )
 810             *height = rHeight * factorY + 0.5 ;
 811         if ( descent )
 812             *descent = rDescent * factorY + 0.5 ;
 813         if ( externalLeading )
 814             *externalLeading = (rHeight - rAscent - rDescent) * factorY + 0.5 ;
 815         // measuring empty strings is not guaranteed, so do it by hand
 816         if ( str.IsEmpty())
 817         {
 818             if ( width )
 819                 *width = 0 ;
 820         }
 821         else
 822         {
 823             // MeasureString does return a rectangle that is way too large, so it is
 824             // not usable here
 825             RectF layoutRect(0,0, 100000.0f, 100000.0f);
 826             StringFormat strFormat;
 827             CharacterRange strRange(0,wcslen(s));
 828             strFormat.SetMeasurableCharacterRanges(1,&strRange);
 829             Region region ;
 830             m_context->MeasureCharacterRanges(s, -1 , m_font,layoutRect, &strFormat,1,&region) ;
 831             RectF bbox ;
 832             region.GetBounds(&bbox,m_context);
 833             if ( width )
 834                 *width = bbox.GetRight()-bbox.GetLeft()+0.5;
 835         }
 836     */
 837 }
 838
 839 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
 840 {
 841     widths.Empty();
 842     widths.Add(0, text.length());
 843
 844     if (text.empty())
 845         return;
 846     /*
 847         wxWCharBuffer ws = text.wc_str( *wxConvUI );
 848         size_t len = wcslen( ws ) ;
 849         wxASSERT_MSG(text.length() == len , wxT("GetPartialTextExtents not yet implemented for multichar situations"));
 850
 851         RectF layoutRect(0,0, 100000.0f, 100000.0f);
 852         StringFormat strFormat;
 853
 854         CharacterRange* ranges = new CharacterRange[len] ;
 855         Region* regions = new Region[len];
 856         for( int i = 0 ; i < len ; ++i)
 857         {
 858             ranges[i].First = i ;
 859             ranges[i].Length = 1 ;
 860         }
 861         strFormat.SetMeasurableCharacterRanges(len,ranges);
 862         m_context->MeasureCharacterRanges(ws, -1 , m_font,layoutRect, &strFormat,1,regions) ;
 863
 864         RectF bbox ;
 865         for ( int i = 0 ; i < len ; ++i)
 866         {
 867             regions[i].GetBounds(&bbox,m_context);
 868             widths[i] = bbox.GetRight()-bbox.GetLeft();
 869         }
 870     */
 871 }
 872
 873 void wxCairoContext::SetFont( const wxFont &font )
 874 {
 875     cairo_select_font_face(m_context,font.GetFaceName().mb_str(wxConvUTF8),
 876                            font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL,
 877                            font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL);
 878
 879     cairo_set_font_size(m_context,font.GetPointSize());
 880     // TODO UNDERLINE
 881     // TODO FIX SIZE
 882 }
 883
 884 void * wxCairoContext::GetNativeContext()
 885 {
 886         return m_context;
 887 }
 888
 889 wxGraphicsContext* wxGraphicsContext::Create( const wxWindowDC& dc )
 890 {
 891     return new wxCairoContext(dc);
 892 }
 893
 894 wxGraphicsContext* wxGraphicsContext::Create( wxWindow * window )
 895 {
 896         return NULL; // TODO
 897 }
 898
 899 wxGraphicsContext* wxGraphicsContext::CreateFromNative( void * context )
 900 {
 901         return NULL; // TODO
 902 }
 903
 904 #endif  // wxUSE_GRAPHICS_CONTEXT