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 #ifdef __WXGTK__
  36 #include "wx/gtk/win_gtk.h"
  37 #endif
  38
  39 #include "wx/graphics.h"
  40
  41 #if wxUSE_GRAPHICS_CONTEXT
  42
  43 #include <vector>
  44
  45 using namespace std;
  46
  47 //-----------------------------------------------------------------------------
  48 // constants
  49 //-----------------------------------------------------------------------------
  50
  51 const double RAD2DEG = 180.0 / M_PI;
  52
  53 //-----------------------------------------------------------------------------
  54 // Local functions
  55 //-----------------------------------------------------------------------------
  56
  57 static inline double dmin(double a, double b)
  58 {
  59     return a < b ? a : b;
  60 }
  61 static inline double dmax(double a, double b)
  62 {
  63     return a > b ? a : b;
  64 }
  65
  66 static inline double DegToRad(double deg)
  67 {
  68     return (deg * M_PI) / 180.0;
  69 }
  70 static inline double RadToDeg(double deg)
  71 {
  72     return (deg * 180.0) / M_PI;
  73 }
  74
  75 //-----------------------------------------------------------------------------
  76 // device context implementation
  77 //
  78 // more and more of the dc functionality should be implemented by calling
  79 // the appropricate wxCairoContext, but we will have to do that step by step
  80 // also coordinate conversions should be moved to native matrix ops
  81 //-----------------------------------------------------------------------------
  82
  83 // we always stock two context states, one at entry, to be able to preserve the
  84 // state we were called with, the other one after changing to HI Graphics orientation
  85 // (this one is used for getting back clippings etc)
  86
  87 //-----------------------------------------------------------------------------
  88 // wxGraphicsPath implementation
  89 //-----------------------------------------------------------------------------
  90
  91 // TODO remove this dependency (gdiplus needs the macros)
  92
  93 #ifndef max
  94 #define max(a,b)            (((a) > (b)) ? (a) : (b))
  95 #endif
  96
  97 #ifndef min
  98 #define min(a,b)            (((a) < (b)) ? (a) : (b))
  99 #endif
 100
 101 #include <cairo.h>
 102 #ifdef __WXGTK__
 103 #include <gtk/gtk.h>
 104 #endif
 105
 106 class WXDLLIMPEXP_CORE wxCairoPathData : public wxGraphicsPathData
 107 {
 108 public :
 109     wxCairoPathData(wxGraphicsRenderer* renderer, cairo_t* path = NULL);
 110     ~wxCairoPathData();
 111
 112     virtual wxGraphicsObjectRefData *Clone() const;
 113
 114     //
 115     // These are the path primitives from which everything else can be constructed
 116     //
 117
 118     // begins a new subpath at (x,y)
 119     virtual void MoveToPoint( wxDouble x, wxDouble y );
 120
 121     // adds a straight line from the current point to (x,y)
 122     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 123
 124     // adds a cubic Bezier curve from the current point, using two control points and an end point
 125     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 126
 127
 128     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 129     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 130
 131     // gets the last point of the current path, (0,0) if not yet set
 132     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 133
 134     // adds another path
 135     virtual void AddPath( const wxGraphicsPathData* path );
 136
 137     // closes the current sub-path
 138     virtual void CloseSubpath();
 139
 140     //
 141     // These are convenience functions which - if not available natively will be assembled
 142     // using the primitives from above
 143     //
 144
 145     /*
 146
 147     // appends a rectangle as a new closed subpath
 148     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 149     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 150     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 151
 152     // 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)
 153     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 154     */
 155
 156     // returns the native path
 157     virtual void * GetNativePath() const ;
 158
 159     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 160     virtual void UnGetNativePath(void *p) const;
 161
 162     // transforms each point of this path by the matrix
 163     virtual void Transform( const wxGraphicsMatrixData* matrix ) ;
 164
 165     // gets the bounding box enclosing all points (possibly including control points)
 166     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
 167
 168     virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxWINDING_RULE) const;
 169
 170 private :
 171     cairo_t* m_pathContext;
 172 };
 173
 174 class WXDLLIMPEXP_CORE wxCairoMatrixData : public wxGraphicsMatrixData
 175 {
 176 public :
 177     wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix = NULL ) ;
 178     virtual ~wxCairoMatrixData() ;
 179
 180     virtual wxGraphicsObjectRefData *Clone() const ;
 181
 182     // concatenates the matrix
 183     virtual void Concat( const wxGraphicsMatrixData *t );
 184
 185     // sets the matrix to the respective values
 186     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 187         wxDouble tx=0.0, wxDouble ty=0.0);
 188
 189     // gets the component valuess of the matrix
 190     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
 191                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
 192
 193     // makes this the inverse matrix
 194     virtual void Invert();
 195
 196     // returns true if the elements of the transformation matrix are equal ?
 197     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
 198
 199     // return true if this is the identity matrix
 200     virtual bool IsIdentity() const;
 201
 202     //
 203     // transformation
 204     //
 205
 206     // add the translation to this matrix
 207     virtual void Translate( wxDouble dx , wxDouble dy );
 208
 209     // add the scale to this matrix
 210     virtual void Scale( wxDouble xScale , wxDouble yScale );
 211
 212     // add the rotation to this matrix (radians)
 213     virtual void Rotate( wxDouble angle );
 214
 215     //
 216     // apply the transforms
 217     //
 218
 219     // applies that matrix to the point
 220     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 221
 222     // applies the matrix except for translations
 223     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 224
 225     // returns the native representation
 226     virtual void * GetNativeMatrix() const;
 227 private:
 228     cairo_matrix_t m_matrix ;
 229 } ;
 230
 231 class WXDLLIMPEXP_CORE wxCairoPenData : public wxGraphicsObjectRefData
 232 {
 233 public:
 234     wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 235     ~wxCairoPenData();
 236
 237     void Init();
 238
 239     virtual void Apply( wxGraphicsContext* context );
 240     virtual wxDouble GetWidth() { return m_width; }
 241
 242 private :
 243     double m_width;
 244
 245     double m_red;
 246     double m_green;
 247     double m_blue;
 248     double m_alpha;
 249
 250     cairo_line_cap_t m_cap;
 251     cairo_line_join_t m_join;
 252
 253     int m_count;
 254     const double *m_lengths;
 255     double *m_userLengths;
 256
 257     wxPen m_pen;
 258 };
 259
 260 class WXDLLIMPEXP_CORE wxCairoBrushData : public wxGraphicsObjectRefData
 261 {
 262 public:
 263     wxCairoBrushData( wxGraphicsRenderer* renderer );
 264     wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 265     ~wxCairoBrushData ();
 266
 267     virtual void Apply( wxGraphicsContext* context );
 268     void CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 269         const wxColour&c1, const wxColour&c2 );
 270     void CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 271         const wxColour &oColor, const wxColour &cColor );
 272
 273 protected:
 274     virtual void Init();
 275
 276 private :
 277     double m_red;
 278     double m_green;
 279     double m_blue;
 280     double m_alpha;
 281
 282     cairo_pattern_t* m_brushPattern;
 283 };
 284
 285 class wxCairoFontData : public wxGraphicsObjectRefData
 286 {
 287 public:
 288     wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col );
 289     ~wxCairoFontData();
 290
 291     virtual void Apply( wxGraphicsContext* context );
 292 private :
 293     wxCharBuffer m_fontName;
 294     double m_size;
 295     cairo_font_slant_t m_slant;
 296     cairo_font_weight_t m_weight;
 297     double m_red;
 298     double m_green;
 299     double m_blue;
 300     double m_alpha;
 301 };
 302
 303 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
 304 {
 305     DECLARE_NO_COPY_CLASS(wxCairoContext)
 306
 307 public:
 308     wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc );
 309 #ifdef __WXGTK__
 310     wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable );
 311 #endif
 312     wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context );
 313     wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window);
 314     wxCairoContext();
 315     virtual ~wxCairoContext();
 316
 317     virtual void Clip( const wxRegion &region );
 318
 319     // clips drawings to the rect
 320     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 321
 322     // resets the clipping to original extent
 323     virtual void ResetClip();
 324
 325     virtual void * GetNativeContext();
 326
 327     virtual void StrokePath( const wxGraphicsPath& p );
 328     virtual void FillPath( const wxGraphicsPath& p , int fillStyle = wxWINDING_RULE );
 329
 330     virtual void Translate( wxDouble dx , wxDouble dy );
 331     virtual void Scale( wxDouble xScale , wxDouble yScale );
 332     virtual void Rotate( wxDouble angle );
 333
 334     // concatenates this transform with the current transform of this context
 335     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 336
 337     // sets the transform of this context
 338     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 339
 340     // gets the matrix of this context
 341     virtual wxGraphicsMatrix GetTransform() const;
 342
 343     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 344     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 345     virtual void PushState();
 346     virtual void PopState();
 347
 348     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y);
 349     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 350                                 wxDouble *descent, wxDouble *externalLeading ) const;
 351     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 352
 353 private:
 354     cairo_t* m_context;
 355 };
 356
 357 //-----------------------------------------------------------------------------
 358 // wxCairoPenData implementation
 359 //-----------------------------------------------------------------------------
 360
 361 wxCairoPenData::~wxCairoPenData()
 362 {
 363     delete[] m_userLengths;
 364 }
 365
 366 void wxCairoPenData::Init()
 367 {
 368     m_lengths = NULL;
 369     m_userLengths = NULL;
 370     m_width = 0;
 371     m_count = 0;
 372 }
 373
 374 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 375 : wxGraphicsObjectRefData(renderer)
 376 {
 377     Init();
 378     m_pen = pen;
 379     m_width = m_pen.GetWidth();
 380     if (m_width <= 0.0)
 381         m_width = 0.1;
 382
 383     m_red = m_pen.GetColour().Red()/255.0;
 384     m_green = m_pen.GetColour().Green()/255.0;
 385     m_blue = m_pen.GetColour().Blue()/255.0;
 386     m_alpha = m_pen.GetColour().Alpha()/255.0;
 387
 388     switch ( m_pen.GetCap() )
 389     {
 390     case wxCAP_ROUND :
 391         m_cap = CAIRO_LINE_CAP_ROUND;
 392         break;
 393
 394     case wxCAP_PROJECTING :
 395         m_cap = CAIRO_LINE_CAP_SQUARE;
 396         break;
 397
 398     case wxCAP_BUTT :
 399         m_cap = CAIRO_LINE_CAP_BUTT;
 400         break;
 401
 402     default :
 403         m_cap = CAIRO_LINE_CAP_BUTT;
 404         break;
 405     }
 406
 407     switch ( m_pen.GetJoin() )
 408     {
 409     case wxJOIN_BEVEL :
 410         m_join = CAIRO_LINE_JOIN_BEVEL;
 411         break;
 412
 413     case wxJOIN_MITER :
 414         m_join = CAIRO_LINE_JOIN_MITER;
 415         break;
 416
 417     case wxJOIN_ROUND :
 418         m_join = CAIRO_LINE_JOIN_ROUND;
 419         break;
 420
 421     default :
 422         m_join = CAIRO_LINE_JOIN_MITER;
 423         break;
 424     }
 425
 426     const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
 427     const double dotted[] =
 428     {
 429         dashUnit , dashUnit + 2.0
 430     };
 431     static const double short_dashed[] =
 432     {
 433         9.0 , 6.0
 434     };
 435     static const double dashed[] =
 436     {
 437         19.0 , 9.0
 438     };
 439     static const double dotted_dashed[] =
 440     {
 441         9.0 , 6.0 , 3.0 , 3.0
 442     };
 443
 444     switch ( m_pen.GetStyle() )
 445     {
 446     case wxSOLID :
 447         break;
 448
 449     case wxDOT :
 450         m_count = WXSIZEOF(dotted);
 451         m_userLengths = new double[ m_count ] ;
 452         memcpy( m_userLengths, dotted, sizeof(dotted) );
 453         m_lengths = m_userLengths;
 454         break;
 455
 456     case wxLONG_DASH :
 457         m_lengths = dotted ;
 458         m_count = WXSIZEOF(dashed);
 459         break;
 460
 461     case wxSHORT_DASH :
 462         m_lengths = dotted ;
 463         m_count = WXSIZEOF(short_dashed);
 464         break;
 465
 466     case wxDOT_DASH :
 467         m_lengths = dotted ;
 468         m_count = WXSIZEOF(dotted_dashed);
 469         break;
 470
 471     case wxUSER_DASH :
 472         {
 473             wxDash *wxdashes ;
 474             m_count = m_pen.GetDashes( &wxdashes ) ;
 475             if ((wxdashes != NULL) && (m_count > 0))
 476             {
 477                 m_userLengths = new double[m_count] ;
 478                 for ( int i = 0 ; i < m_count ; ++i )
 479                 {
 480                     m_userLengths[i] = wxdashes[i] * dashUnit ;
 481
 482                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 483                         m_userLengths[i] = dashUnit + 2.0 ;
 484                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 485                         m_userLengths[i] = dashUnit ;
 486                 }
 487             }
 488             m_lengths = m_userLengths ;
 489         }
 490         break;
 491     case wxSTIPPLE :
 492         {
 493             /*
 494             wxBitmap* bmp = pen.GetStipple();
 495             if ( bmp && bmp->Ok() )
 496             {
 497             wxDELETE( m_penImage );
 498             wxDELETE( m_penBrush );
 499             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 500             m_penBrush = new TextureBrush(m_penImage);
 501             m_pen->SetBrush( m_penBrush );
 502             }
 503             */
 504         }
 505         break;
 506     default :
 507         if ( m_pen.GetStyle() >= wxFIRST_HATCH && m_pen.GetStyle() <= wxLAST_HATCH )
 508         {
 509             /*
 510             wxDELETE( m_penBrush );
 511             HatchStyle style = HatchStyleHorizontal;
 512             switch( pen.GetStyle() )
 513             {
 514             case wxBDIAGONAL_HATCH :
 515             style = HatchStyleBackwardDiagonal;
 516             break ;
 517             case wxCROSSDIAG_HATCH :
 518             style = HatchStyleDiagonalCross;
 519             break ;
 520             case wxFDIAGONAL_HATCH :
 521             style = HatchStyleForwardDiagonal;
 522             break ;
 523             case wxCROSS_HATCH :
 524             style = HatchStyleCross;
 525             break ;
 526             case wxHORIZONTAL_HATCH :
 527             style = HatchStyleHorizontal;
 528             break ;
 529             case wxVERTICAL_HATCH :
 530             style = HatchStyleVertical;
 531             break ;
 532
 533             }
 534             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 535             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 536             m_pen->SetBrush( m_penBrush )
 537             */
 538         }
 539         break;
 540     }
 541 }
 542
 543 void wxCairoPenData::Apply( wxGraphicsContext* context )
 544 {
 545     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 546     cairo_set_line_width(ctext,m_width);
 547     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 548     cairo_set_line_cap(ctext,m_cap);
 549     cairo_set_line_join(ctext,m_join);
 550     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 551 }
 552
 553 //-----------------------------------------------------------------------------
 554 // wxCairoBrushData implementation
 555 //-----------------------------------------------------------------------------
 556
 557 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 558   : wxGraphicsObjectRefData( renderer )
 559 {
 560     Init();
 561 }
 562
 563 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
 564   : wxGraphicsObjectRefData(renderer)
 565 {
 566     Init();
 567
 568     m_red = brush.GetColour().Red()/255.0;
 569     m_green = brush.GetColour().Green()/255.0;
 570     m_blue = brush.GetColour().Blue()/255.0;
 571     m_alpha = brush.GetColour().Alpha()/255.0;
 572     /*
 573     if ( brush.GetStyle() == wxSOLID)
 574     {
 575     m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 576     brush.GetColour().Green() , brush.GetColour().Blue() ) );
 577     }
 578     else if ( brush.IsHatch() )
 579     {
 580     HatchStyle style = HatchStyleHorizontal;
 581     switch( brush.GetStyle() )
 582     {
 583     case wxBDIAGONAL_HATCH :
 584     style = HatchStyleBackwardDiagonal;
 585     break ;
 586     case wxCROSSDIAG_HATCH :
 587     style = HatchStyleDiagonalCross;
 588     break ;
 589     case wxFDIAGONAL_HATCH :
 590     style = HatchStyleForwardDiagonal;
 591     break ;
 592     case wxCROSS_HATCH :
 593     style = HatchStyleCross;
 594     break ;
 595     case wxHORIZONTAL_HATCH :
 596     style = HatchStyleHorizontal;
 597     break ;
 598     case wxVERTICAL_HATCH :
 599     style = HatchStyleVertical;
 600     break ;
 601
 602     }
 603     m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 604     brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 605     }
 606     else
 607     {
 608     wxBitmap* bmp = brush.GetStipple();
 609     if ( bmp && bmp->Ok() )
 610     {
 611     wxDELETE( m_brushImage );
 612     m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 613     m_brush = new TextureBrush(m_brushImage);
 614     }
 615     }
 616     */
 617 }
 618
 619 wxCairoBrushData::~wxCairoBrushData ()
 620 {
 621     if (m_brushPattern)
 622         cairo_pattern_destroy(m_brushPattern);
 623 }
 624
 625 void wxCairoBrushData::Apply( wxGraphicsContext* context )
 626 {
 627     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 628     if ( m_brushPattern )
 629     {
 630         cairo_set_source(ctext,m_brushPattern);
 631     }
 632     else
 633     {
 634         cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 635     }
 636 }
 637
 638 void wxCairoBrushData::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 639         const wxColour&c1, const wxColour&c2 )
 640 {
 641     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 642     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,c1.Red()/255.0,
 643         c1.Green()/255.0, c1.Blue()/255.0,c1.Alpha()/255.0);
 644     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,c2.Red()/255.0,
 645         c2.Green()/255.0, c2.Blue()/255.0,c2.Alpha()/255.0);
 646     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 647 }
 648
 649 void wxCairoBrushData::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 650         const wxColour &oColor, const wxColour &cColor )
 651 {
 652     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 653     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,oColor.Red()/255.0,
 654         oColor.Green()/255.0, oColor.Blue()/255.0,oColor.Alpha()/255.0);
 655     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,cColor.Red()/255.0,
 656         cColor.Green()/255.0, cColor.Blue()/255.0,cColor.Alpha()/255.0);
 657     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 658 }
 659
 660 void wxCairoBrushData::Init()
 661 {
 662     m_brushPattern = NULL;
 663 }
 664
 665 //-----------------------------------------------------------------------------
 666 // wxCairoFontData implementation
 667 //-----------------------------------------------------------------------------
 668
 669 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 670                          const wxColour& col ) : wxGraphicsObjectRefData(renderer)
 671 {
 672     m_red = col.Red()/255.0;
 673     m_green = col.Green()/255.0;
 674     m_blue = col.Blue()/255.0;
 675     m_alpha = col.Alpha()/255.0;
 676
 677     m_size = font.GetPointSize();
 678     m_fontName = font.GetFaceName().mb_str(wxConvUTF8);
 679     m_slant = font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL;
 680     m_weight = font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL;
 681 }
 682
 683 wxCairoFontData::~wxCairoFontData()
 684 {
 685 }
 686
 687 void wxCairoFontData::Apply( wxGraphicsContext* context )
 688 {
 689     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 690     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 691     cairo_select_font_face(ctext,m_fontName,m_slant,m_weight);
 692     cairo_set_font_size(ctext,m_size);
 693     // TODO UNDERLINE
 694     // TODO FIX SIZE
 695 }
 696
 697 //-----------------------------------------------------------------------------
 698 // wxCairoPathData implementation
 699 //-----------------------------------------------------------------------------
 700
 701 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
 702     : wxGraphicsPathData(renderer)
 703 {
 704     if (pathcontext)
 705     {
 706         m_pathContext = pathcontext;
 707     }
 708     else
 709     {
 710         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 711         m_pathContext = cairo_create(surface);
 712         cairo_surface_destroy (surface);
 713     }
 714 }
 715
 716 wxCairoPathData::~wxCairoPathData()
 717 {
 718     cairo_destroy(m_pathContext);
 719 }
 720
 721 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
 722 {
 723     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 724     cairo_t* pathcontext = cairo_create(surface);
 725     cairo_surface_destroy (surface);
 726
 727     cairo_path_t* path = cairo_copy_path(m_pathContext);
 728     cairo_append_path(pathcontext, path);
 729     cairo_path_destroy(path);
 730     return new wxCairoPathData( GetRenderer() ,pathcontext);
 731 }
 732
 733
 734 void* wxCairoPathData::GetNativePath() const
 735 {
 736     return cairo_copy_path(m_pathContext) ;
 737 }
 738
 739 void wxCairoPathData::UnGetNativePath(void *p) const
 740 {
 741     cairo_path_destroy((cairo_path_t*)p);
 742 }
 743
 744 //
 745 // The Primitives
 746 //
 747
 748 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
 749 {
 750     cairo_move_to(m_pathContext,x,y);
 751 }
 752
 753 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
 754 {
 755     cairo_line_to(m_pathContext,x,y);
 756 }
 757
 758 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
 759 {
 760     // TODO
 761 }
 762
 763 void wxCairoPathData::CloseSubpath()
 764 {
 765     cairo_close_path(m_pathContext);
 766 }
 767
 768 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 769 {
 770     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
 771 }
 772
 773 // gets the last point of the current path, (0,0) if not yet set
 774 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
 775 {
 776     double dx,dy;
 777     cairo_get_current_point(m_pathContext,&dx,&dy);
 778     if (x)
 779         *x = dx;
 780     if (y)
 781         *y = dy;
 782 }
 783
 784 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 785 {
 786     // as clockwise means positive in our system (y pointing downwards)
 787     // TODO make this interpretation dependent of the
 788     // real device trans
 789     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
 790         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
 791     else
 792         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
 793 }
 794
 795 // transforms each point of this path by the matrix
 796 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
 797 {
 798     // as we don't have a true path object, we have to apply the inverse
 799     // matrix to the context
 800     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
 801     cairo_matrix_invert( &m );
 802     cairo_transform(m_pathContext,&m);
 803 }
 804
 805 // gets the bounding box enclosing all points (possibly including control points)
 806 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
 807 {
 808     double x1,y1,x2,y2;
 809
 810     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
 811     if ( x2 < x1 )
 812     {
 813         *x = x2;
 814         *w = x1-x2;
 815     }
 816     else
 817     {
 818         *x = x1;
 819         *w = x2-x1;
 820     }
 821
 822     if( y2 < y1 )
 823     {
 824         *y = y2;
 825         *h = y1-y2;
 826     }
 827     else
 828     {
 829         *y = y1;
 830         *h = y2-y1;
 831     }
 832 }
 833
 834 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, int fillStyle ) const
 835 {
 836     return cairo_in_stroke( m_pathContext, x, y) != 0;
 837 }
 838
 839 //-----------------------------------------------------------------------------
 840 // wxCairoMatrixData implementation
 841 //-----------------------------------------------------------------------------
 842
 843 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
 844     : wxGraphicsMatrixData(renderer)
 845 {
 846     if ( matrix )
 847         m_matrix = *matrix;
 848 }
 849
 850 wxCairoMatrixData::~wxCairoMatrixData()
 851 {
 852     // nothing to do
 853 }
 854
 855 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
 856 {
 857     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
 858 }
 859
 860 // concatenates the matrix
 861 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
 862 {
 863     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
 864 }
 865
 866 // sets the matrix to the respective values
 867 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
 868                         wxDouble tx, wxDouble ty)
 869 {
 870     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
 871 }
 872
 873 // gets the component valuess of the matrix
 874 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
 875                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
 876 {
 877     if (a)  *a = m_matrix.xx;
 878     if (b)  *b = m_matrix.yx;
 879     if (c)  *c = m_matrix.xy;
 880     if (d)  *d = m_matrix.yy;
 881     if (tx) *tx= m_matrix.x0;
 882     if (ty) *ty= m_matrix.y0;
 883 }
 884
 885 // makes this the inverse matrix
 886 void wxCairoMatrixData::Invert()
 887 {
 888     cairo_matrix_invert( &m_matrix );
 889 }
 890
 891 // returns true if the elements of the transformation matrix are equal ?
 892 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
 893 {
 894     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
 895     return (
 896         m_matrix.xx == tm->xx &&
 897         m_matrix.yx == tm->yx &&
 898         m_matrix.xy == tm->xy &&
 899         m_matrix.yy == tm->yy &&
 900         m_matrix.x0 == tm->x0 &&
 901         m_matrix.y0 == tm->y0 ) ;
 902 }
 903
 904 // return true if this is the identity matrix
 905 bool wxCairoMatrixData::IsIdentity() const
 906 {
 907     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
 908         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
 909 }
 910
 911 //
 912 // transformation
 913 //
 914
 915 // add the translation to this matrix
 916 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
 917 {
 918     cairo_matrix_translate( &m_matrix, dx, dy) ;
 919 }
 920
 921 // add the scale to this matrix
 922 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
 923 {
 924     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
 925 }
 926
 927 // add the rotation to this matrix (radians)
 928 void wxCairoMatrixData::Rotate( wxDouble angle )
 929 {
 930     cairo_matrix_rotate( &m_matrix, angle) ;
 931 }
 932
 933 //
 934 // apply the transforms
 935 //
 936
 937 // applies that matrix to the point
 938 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
 939 {
 940     double lx = *x, ly = *y ;
 941     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
 942     *x = lx;
 943     *y = ly;
 944 }
 945
 946 // applies the matrix except for translations
 947 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
 948 {
 949     double lx = *dx, ly = *dy ;
 950     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
 951     *dx = lx;
 952     *dy = ly;
 953 }
 954
 955 // returns the native representation
 956 void * wxCairoMatrixData::GetNativeMatrix() const
 957 {
 958     return (void*) &m_matrix;
 959 }
 960
 961 //-----------------------------------------------------------------------------
 962 // wxCairoContext implementation
 963 //-----------------------------------------------------------------------------
 964
 965 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
 966 : wxGraphicsContext(renderer)
 967 {
 968 #ifdef __WXGTK__
 969     m_context = gdk_cairo_create( dc.m_window ) ;
 970 #endif
 971     PushState();
 972     PushState();
 973 }
 974
 975 #ifdef __WXGTK__
 976 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
 977 : wxGraphicsContext(renderer)
 978 {
 979     m_context = gdk_cairo_create( drawable ) ;
 980     PushState();
 981     PushState();
 982 }
 983 #endif
 984
 985 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
 986 : wxGraphicsContext(renderer)
 987 {
 988     m_context = context ;
 989     PushState();
 990     PushState();
 991 }
 992
 993 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
 994 : wxGraphicsContext(renderer)
 995 {
 996 #ifdef __WXGTK__
 997     // something along these lines (copied from dcclient)
 998
 999     GtkWidget *widget = window->m_wxwindow;
1000
1001     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1002     // code should still be able to create wxClientDCs for them, so we will
1003     // use the parent window here then.
1004     if ( !widget )
1005     {
1006         window = window->GetParent();
1007         widget = window->m_wxwindow;
1008     }
1009
1010     wxASSERT_MSG( widget, wxT("wxCairoContext needs a widget") );
1011
1012     GtkPizza *pizza = GTK_PIZZA( widget );
1013     GdkDrawable* drawable = pizza->bin_window;
1014     m_context = gdk_cairo_create( drawable ) ;
1015 #endif
1016     PushState();
1017     PushState();
1018 }
1019
1020 wxCairoContext::~wxCairoContext()
1021 {
1022     if ( m_context )
1023     {
1024         PopState();
1025         PopState();
1026         cairo_destroy(m_context);
1027     }
1028 }
1029
1030
1031 void wxCairoContext::Clip( const wxRegion & WXUNUSED(region) )
1032 {
1033 // TODO
1034 }
1035
1036 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1037 {
1038 // TODO
1039 }
1040
1041 void wxCairoContext::ResetClip()
1042 {
1043 // TODO
1044 }
1045
1046
1047 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1048 {
1049     if ( !m_pen.IsNull() )
1050     {
1051         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1052         cairo_append_path(m_context,cp);
1053         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1054         cairo_stroke(m_context);
1055         path.UnGetNativePath(cp);
1056     }
1057 }
1058
1059 void wxCairoContext::FillPath( const wxGraphicsPath& path , int fillStyle )
1060 {
1061     if ( !m_brush.IsNull() )
1062     {
1063         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1064         cairo_append_path(m_context,cp);
1065         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1066         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1067         cairo_fill(m_context);
1068         path.UnGetNativePath(cp);
1069     }
1070 }
1071
1072 void wxCairoContext::Rotate( wxDouble angle )
1073 {
1074     cairo_rotate(m_context,angle);
1075 }
1076
1077 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1078 {
1079     cairo_translate(m_context,dx,dy);
1080 }
1081
1082 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1083 {
1084     cairo_scale(m_context,xScale,yScale);
1085 }
1086
1087 // concatenates this transform with the current transform of this context
1088 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1089 {
1090     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1091 }
1092
1093 // sets the transform of this context
1094 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1095 {
1096     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1097 }
1098
1099 // gets the matrix of this context
1100 wxGraphicsMatrix wxCairoContext::GetTransform() const
1101 {
1102     wxGraphicsMatrix matrix = CreateMatrix();
1103     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1104     return matrix;
1105 }
1106
1107
1108
1109 void wxCairoContext::PushState()
1110 {
1111     cairo_save(m_context);
1112 }
1113
1114 void wxCairoContext::PopState()
1115 {
1116     cairo_restore(m_context);
1117 }
1118
1119 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1120 {
1121     /*
1122         Bitmap* image = Bitmap::FromHBITMAP((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE());
1123         m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
1124         delete image ;
1125     */
1126 }
1127
1128 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1129 {
1130     /*
1131         Bitmap* image = Bitmap::FromHICON((HICON)icon.GetHICON());
1132         m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
1133         delete image ;
1134     */
1135 }
1136
1137
1138 void wxCairoContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
1139 {
1140     if ( m_font.IsNull() || str.IsEmpty())
1141         return ;
1142     cairo_move_to(m_context,x,y);
1143     const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
1144     ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
1145     cairo_show_text(m_context,buf);
1146 }
1147
1148 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1149                                     wxDouble *descent, wxDouble *externalLeading ) const
1150 {
1151     // TODO
1152 }
1153
1154 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
1155 {
1156     widths.Empty();
1157     widths.Add(0, text.length());
1158
1159     if (text.empty())
1160         return;
1161
1162     // TODO
1163 }
1164
1165 void * wxCairoContext::GetNativeContext()
1166 {
1167     return m_context;
1168 }
1169
1170 //-----------------------------------------------------------------------------
1171 // wxCairoRenderer declaration
1172 //-----------------------------------------------------------------------------
1173
1174 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
1175 {
1176 public :
1177     wxCairoRenderer() {}
1178
1179     virtual ~wxCairoRenderer() {}
1180
1181     // Context
1182
1183     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
1184
1185 #ifdef __WXMSW__
1186     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
1187 #endif
1188
1189     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
1190
1191     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
1192
1193     virtual wxGraphicsContext * CreateContext( wxWindow* window );
1194
1195     virtual wxGraphicsContext * CreateMeasuringContext();
1196
1197     // Path
1198
1199     virtual wxGraphicsPath CreatePath();
1200
1201     // Matrix
1202
1203     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
1204         wxDouble tx=0.0, wxDouble ty=0.0);
1205
1206
1207     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
1208
1209     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
1210
1211     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1212     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1213         const wxColour&c1, const wxColour&c2) ;
1214
1215     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1216     // with radius r and color cColor
1217     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1218         const wxColour &oColor, const wxColour &cColor) ;
1219
1220     // sets the font
1221     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
1222
1223 private :
1224     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
1225 } ;
1226
1227 //-----------------------------------------------------------------------------
1228 // wxCairoRenderer implementation
1229 //-----------------------------------------------------------------------------
1230
1231 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
1232
1233 static wxCairoRenderer gs_cairoGraphicsRenderer;
1234
1235 #ifdef __WXGTK__
1236 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
1237 {
1238     return &gs_cairoGraphicsRenderer;
1239 }
1240 #endif
1241
1242 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
1243 {
1244     return new wxCairoContext(this,dc);
1245 }
1246
1247 #ifdef __WXMSW__
1248 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
1249 {
1250     return NULL;
1251 }
1252 #endif
1253
1254 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
1255 {
1256     return new wxCairoContext(this,(cairo_t*)context);
1257 }
1258
1259
1260 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
1261 {
1262 #ifdef __WXGTK__
1263     return new wxCairoContext(this,(GdkDrawable*)window);
1264 #else
1265     return NULL;
1266 #endif
1267 }
1268
1269 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
1270 {
1271     return NULL;
1272     // TODO
1273 }
1274
1275 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
1276 {
1277     return new wxCairoContext(this, window );
1278 }
1279
1280 // Path
1281
1282 wxGraphicsPath wxCairoRenderer::CreatePath()
1283 {
1284     wxGraphicsPath path;
1285     path.SetRefData( new wxCairoPathData(this) );
1286     return path;
1287 }
1288
1289
1290 // Matrix
1291
1292 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1293                                                 wxDouble tx, wxDouble ty)
1294
1295 {
1296     wxGraphicsMatrix m;
1297     wxCairoMatrixData* data = new wxCairoMatrixData( this );
1298     data->Set( a,b,c,d,tx,ty ) ;
1299     m.SetRefData(data);
1300     return m;
1301 }
1302
1303 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
1304 {
1305     if ( !pen.Ok() || pen.GetStyle() == wxTRANSPARENT )
1306         return wxNullGraphicsPen;
1307     else
1308     {
1309         wxGraphicsPen p;
1310         p.SetRefData(new wxCairoPenData( this, pen ));
1311         return p;
1312     }
1313 }
1314
1315 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
1316 {
1317     if ( !brush.Ok() || brush.GetStyle() == wxTRANSPARENT )
1318         return wxNullGraphicsBrush;
1319     else
1320     {
1321         wxGraphicsBrush p;
1322         p.SetRefData(new wxCairoBrushData( this, brush ));
1323         return p;
1324     }
1325 }
1326
1327 // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1328 wxGraphicsBrush wxCairoRenderer::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1329                                                                       const wxColour&c1, const wxColour&c2)
1330 {
1331     wxGraphicsBrush p;
1332     wxCairoBrushData* d = new wxCairoBrushData( this );
1333     d->CreateLinearGradientBrush(x1, y1, x2, y2, c1, c2);
1334     p.SetRefData(d);
1335     return p;
1336 }
1337
1338 // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1339 // with radius r and color cColor
1340 wxGraphicsBrush wxCairoRenderer::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1341                                                                       const wxColour &oColor, const wxColour &cColor)
1342 {
1343     wxGraphicsBrush p;
1344     wxCairoBrushData* d = new wxCairoBrushData( this );
1345     d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,oColor,cColor);
1346     p.SetRefData(d);
1347     return p;
1348 }
1349
1350 // sets the font
1351 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
1352 {
1353     if ( font.Ok() )
1354     {
1355         wxGraphicsFont p;
1356         p.SetRefData(new wxCairoFontData( this , font, col ));
1357         return p;
1358     }
1359     else
1360         return wxNullGraphicsFont;
1361 }
1362
1363 #endif  // wxUSE_GRAPHICS_CONTEXT