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