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 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #if wxUSE_GRAPHICS_CONTEXT
  19
  20 #include "wx/graphics.h"
  21
  22 #if wxUSE_CAIRO
  23
  24 // keep cairo.h from defining dllimport as we're defining the symbols inside
  25 // the wx dll in order to load them dynamically.
  26 #define cairo_public
  27
  28 #include "wx/cairo.h"
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/bitmap.h"
  32     #include "wx/icon.h"
  33     #include "wx/dcclient.h"
  34     #include "wx/dcmemory.h"
  35     #include "wx/dcprint.h"
  36     #ifdef __WXGTK__
  37         #include "wx/window.h"
  38     #endif
  39 #endif
  40
  41 #include "wx/private/graphics.h"
  42 #include "wx/rawbmp.h"
  43 #include "wx/vector.h"
  44
  45 using namespace std;
  46
  47 //-----------------------------------------------------------------------------
  48 // device context implementation
  49 //
  50 // more and more of the dc functionality should be implemented by calling
  51 // the appropricate wxCairoContext, but we will have to do that step by step
  52 // also coordinate conversions should be moved to native matrix ops
  53 //-----------------------------------------------------------------------------
  54
  55 // we always stock two context states, one at entry, to be able to preserve the
  56 // state we were called with, the other one after changing to HI Graphics orientation
  57 // (this one is used for getting back clippings etc)
  58
  59 //-----------------------------------------------------------------------------
  60 // wxGraphicsPath implementation
  61 //-----------------------------------------------------------------------------
  62
  63 // TODO remove this dependency (gdiplus needs the macros)
  64
  65 #ifndef max
  66 #define max(a,b)            (((a) > (b)) ? (a) : (b))
  67 #endif
  68
  69 #ifndef min
  70 #define min(a,b)            (((a) < (b)) ? (a) : (b))
  71 #endif
  72
  73 #include <cairo.h>
  74 #ifdef __WXMSW__
  75 #include <cairo-win32.h>
  76 #endif
  77
  78 #ifdef __WXGTK__
  79 #include <gtk/gtk.h>
  80 #include "wx/fontutil.h"
  81 #include "wx/gtk/dc.h"
  82 #endif
  83
  84 #ifdef __WXMSW__
  85 #include <cairo-win32.h>
  86 #endif
  87
  88 #ifdef __WXMAC__
  89 #include "wx/osx/private.h"
  90 #include <cairo-quartz.h>
  91 #include <cairo-atsui.h>
  92 #endif
  93
  94 class WXDLLIMPEXP_CORE wxCairoPathData : public wxGraphicsPathData
  95 {
  96 public :
  97     wxCairoPathData(wxGraphicsRenderer* renderer, cairo_t* path = NULL);
  98     ~wxCairoPathData();
  99
 100     virtual wxGraphicsObjectRefData *Clone() const;
 101
 102     //
 103     // These are the path primitives from which everything else can be constructed
 104     //
 105
 106     // begins a new subpath at (x,y)
 107     virtual void MoveToPoint( wxDouble x, wxDouble y );
 108
 109     // adds a straight line from the current point to (x,y)
 110     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 111
 112     // adds a cubic Bezier curve from the current point, using two control points and an end point
 113     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 114
 115
 116     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 117     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 118
 119     // gets the last point of the current path, (0,0) if not yet set
 120     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 121
 122     // adds another path
 123     virtual void AddPath( const wxGraphicsPathData* path );
 124
 125     // closes the current sub-path
 126     virtual void CloseSubpath();
 127
 128     //
 129     // These are convenience functions which - if not available natively will be assembled
 130     // using the primitives from above
 131     //
 132
 133     /*
 134
 135     // appends a rectangle as a new closed subpath
 136     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 137     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 138     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 139
 140     // 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)
 141     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 142     */
 143
 144     // returns the native path
 145     virtual void * GetNativePath() const ;
 146
 147     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 148     virtual void UnGetNativePath(void *p) const;
 149
 150     // transforms each point of this path by the matrix
 151     virtual void Transform( const wxGraphicsMatrixData* matrix ) ;
 152
 153     // gets the bounding box enclosing all points (possibly including control points)
 154     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
 155
 156     virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxWINDING_RULE) const;
 157
 158 private :
 159     cairo_t* m_pathContext;
 160 };
 161
 162 class WXDLLIMPEXP_CORE wxCairoMatrixData : public wxGraphicsMatrixData
 163 {
 164 public :
 165     wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix = NULL ) ;
 166     virtual ~wxCairoMatrixData() ;
 167
 168     virtual wxGraphicsObjectRefData *Clone() const ;
 169
 170     // concatenates the matrix
 171     virtual void Concat( const wxGraphicsMatrixData *t );
 172
 173     // sets the matrix to the respective values
 174     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 175         wxDouble tx=0.0, wxDouble ty=0.0);
 176
 177     // gets the component valuess of the matrix
 178     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
 179                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
 180
 181     // makes this the inverse matrix
 182     virtual void Invert();
 183
 184     // returns true if the elements of the transformation matrix are equal ?
 185     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
 186
 187     // return true if this is the identity matrix
 188     virtual bool IsIdentity() const;
 189
 190     //
 191     // transformation
 192     //
 193
 194     // add the translation to this matrix
 195     virtual void Translate( wxDouble dx , wxDouble dy );
 196
 197     // add the scale to this matrix
 198     virtual void Scale( wxDouble xScale , wxDouble yScale );
 199
 200     // add the rotation to this matrix (radians)
 201     virtual void Rotate( wxDouble angle );
 202
 203     //
 204     // apply the transforms
 205     //
 206
 207     // applies that matrix to the point
 208     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 209
 210     // applies the matrix except for translations
 211     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 212
 213     // returns the native representation
 214     virtual void * GetNativeMatrix() const;
 215 private:
 216     cairo_matrix_t m_matrix ;
 217 } ;
 218
 219 class WXDLLIMPEXP_CORE wxCairoPenData : public wxGraphicsObjectRefData
 220 {
 221 public:
 222     wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 223     ~wxCairoPenData();
 224
 225     void Init();
 226
 227     virtual void Apply( wxGraphicsContext* context );
 228     virtual wxDouble GetWidth() { return m_width; }
 229
 230 private :
 231     double m_width;
 232
 233     double m_red;
 234     double m_green;
 235     double m_blue;
 236     double m_alpha;
 237
 238     cairo_line_cap_t m_cap;
 239     cairo_line_join_t m_join;
 240
 241     int m_count;
 242     const double *m_lengths;
 243     double *m_userLengths;
 244
 245     wxPen m_pen;
 246
 247     wxDECLARE_NO_COPY_CLASS(wxCairoPenData);
 248 };
 249
 250 class WXDLLIMPEXP_CORE wxCairoBrushData : public wxGraphicsObjectRefData
 251 {
 252 public:
 253     wxCairoBrushData( wxGraphicsRenderer* renderer );
 254     wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 255     ~wxCairoBrushData ();
 256
 257     virtual void Apply( wxGraphicsContext* context );
 258
 259     void CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 260                                    wxDouble x2, wxDouble y2,
 261                                    const wxGraphicsGradientStops& stops);
 262     void CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 263                                    wxDouble xc, wxDouble yc, wxDouble radius,
 264                                    const wxGraphicsGradientStops& stops);
 265
 266 protected:
 267     virtual void Init();
 268
 269     // common part of Create{Linear,Radial}GradientBrush()
 270     void AddGradientStops(const wxGraphicsGradientStops& stops);
 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 #ifdef __WXGTK__
 289     const PangoFontDescription* GetFont() const { return m_font; }
 290     bool GetUnderlined() const { return m_underlined; }
 291 #endif
 292 private :
 293     double m_size;
 294     bool m_underlined;
 295     double m_red;
 296     double m_green;
 297     double m_blue;
 298     double m_alpha;
 299 #ifdef __WXMAC__
 300     cairo_font_face_t *m_font;
 301 #elif defined(__WXGTK__)
 302     PangoFontDescription* m_font;
 303 #else
 304     wxCharBuffer m_fontName;
 305     cairo_font_slant_t m_slant;
 306     cairo_font_weight_t m_weight;
 307 #endif
 308 };
 309
 310 class wxCairoBitmapData : public wxGraphicsObjectRefData
 311 {
 312 public:
 313     wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp );
 314     wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap );
 315     ~wxCairoBitmapData();
 316
 317     virtual cairo_surface_t* GetCairoSurface() { return m_surface; }
 318     virtual cairo_pattern_t* GetCairoPattern() { return m_pattern; }
 319     virtual wxSize GetSize() { return wxSize(m_width, m_height); }
 320 private :
 321     // Allocate m_buffer for the bitmap of the given size in the given format.
 322     //
 323     // Returns the stride used for the buffer.
 324     int InitBuffer(int width, int height, cairo_format_t format);
 325
 326     // Really create the surface using the buffer (which was supposed to be
 327     // filled since InitBuffer() call).
 328     void InitSurface(cairo_format_t format, int stride);
 329
 330
 331     cairo_surface_t* m_surface;
 332     cairo_pattern_t* m_pattern;
 333     int m_width;
 334     int m_height;
 335     unsigned char* m_buffer;
 336 };
 337
 338 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
 339 {
 340 public:
 341     wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc );
 342     wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc );
 343     wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc );
 344 #ifdef __WXGTK__
 345     wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable );
 346 #endif
 347 #ifdef __WXMSW__
 348     wxCairoContext( wxGraphicsRenderer* renderer, HDC context );
 349 #endif
 350     wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context );
 351     wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window);
 352     wxCairoContext();
 353     virtual ~wxCairoContext();
 354
 355     virtual bool ShouldOffset() const
 356     {
 357         if ( !m_enableOffset )
 358             return false;
 359
 360         int penwidth = 0 ;
 361         if ( !m_pen.IsNull() )
 362         {
 363             penwidth = (int)((wxCairoPenData*)m_pen.GetRefData())->GetWidth();
 364             if ( penwidth == 0 )
 365                 penwidth = 1;
 366         }
 367         return ( penwidth % 2 ) == 1;
 368     }
 369
 370     virtual void Clip( const wxRegion &region );
 371 #ifdef __WXMSW__
 372     cairo_surface_t* m_mswSurface;
 373 #endif
 374
 375     // clips drawings to the rect
 376     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 377
 378     // resets the clipping to original extent
 379     virtual void ResetClip();
 380
 381     virtual void * GetNativeContext();
 382
 383     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
 384
 385     virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation);
 386
 387     virtual bool SetCompositionMode(wxCompositionMode op);
 388
 389     virtual void BeginLayer(wxDouble opacity);
 390
 391     virtual void EndLayer();
 392
 393     virtual void StrokePath( const wxGraphicsPath& p );
 394     virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxWINDING_RULE );
 395
 396     virtual void Translate( wxDouble dx , wxDouble dy );
 397     virtual void Scale( wxDouble xScale , wxDouble yScale );
 398     virtual void Rotate( wxDouble angle );
 399
 400     // concatenates this transform with the current transform of this context
 401     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 402
 403     // sets the transform of this context
 404     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 405
 406     // gets the matrix of this context
 407     virtual wxGraphicsMatrix GetTransform() const;
 408
 409     virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 410     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 411     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 412     virtual void PushState();
 413     virtual void PopState();
 414
 415     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 416                                 wxDouble *descent, wxDouble *externalLeading ) const;
 417     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 418
 419 protected:
 420     virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
 421
 422 private:
 423     void Init(cairo_t *context);
 424
 425     cairo_t* m_context;
 426
 427     wxVector<float> m_layerOpacities;
 428
 429     wxDECLARE_NO_COPY_CLASS(wxCairoContext);
 430 };
 431
 432 //-----------------------------------------------------------------------------
 433 // wxCairoPenData implementation
 434 //-----------------------------------------------------------------------------
 435
 436 wxCairoPenData::~wxCairoPenData()
 437 {
 438     delete[] m_userLengths;
 439 }
 440
 441 void wxCairoPenData::Init()
 442 {
 443     m_lengths = NULL;
 444     m_userLengths = NULL;
 445     m_width = 0;
 446     m_count = 0;
 447 }
 448
 449 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 450 : wxGraphicsObjectRefData(renderer)
 451 {
 452     Init();
 453     m_pen = pen;
 454     m_width = m_pen.GetWidth();
 455     if (m_width <= 0.0)
 456         m_width = 0.1;
 457
 458     m_red = m_pen.GetColour().Red()/255.0;
 459     m_green = m_pen.GetColour().Green()/255.0;
 460     m_blue = m_pen.GetColour().Blue()/255.0;
 461     m_alpha = m_pen.GetColour().Alpha()/255.0;
 462
 463     switch ( m_pen.GetCap() )
 464     {
 465     case wxCAP_ROUND :
 466         m_cap = CAIRO_LINE_CAP_ROUND;
 467         break;
 468
 469     case wxCAP_PROJECTING :
 470         m_cap = CAIRO_LINE_CAP_SQUARE;
 471         break;
 472
 473     case wxCAP_BUTT :
 474         m_cap = CAIRO_LINE_CAP_BUTT;
 475         break;
 476
 477     default :
 478         m_cap = CAIRO_LINE_CAP_BUTT;
 479         break;
 480     }
 481
 482     switch ( m_pen.GetJoin() )
 483     {
 484     case wxJOIN_BEVEL :
 485         m_join = CAIRO_LINE_JOIN_BEVEL;
 486         break;
 487
 488     case wxJOIN_MITER :
 489         m_join = CAIRO_LINE_JOIN_MITER;
 490         break;
 491
 492     case wxJOIN_ROUND :
 493         m_join = CAIRO_LINE_JOIN_ROUND;
 494         break;
 495
 496     default :
 497         m_join = CAIRO_LINE_JOIN_MITER;
 498         break;
 499     }
 500
 501     const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
 502     const double dotted[] =
 503     {
 504         dashUnit , dashUnit + 2.0
 505     };
 506     static const double short_dashed[] =
 507     {
 508         9.0 , 6.0
 509     };
 510     static const double dashed[] =
 511     {
 512         19.0 , 9.0
 513     };
 514     static const double dotted_dashed[] =
 515     {
 516         9.0 , 6.0 , 3.0 , 3.0
 517     };
 518
 519     switch ( m_pen.GetStyle() )
 520     {
 521     case wxPENSTYLE_SOLID :
 522         break;
 523
 524     case wxPENSTYLE_DOT :
 525         m_count = WXSIZEOF(dotted);
 526         m_userLengths = new double[ m_count ] ;
 527         memcpy( m_userLengths, dotted, sizeof(dotted) );
 528         m_lengths = m_userLengths;
 529         break;
 530
 531     case wxPENSTYLE_LONG_DASH :
 532         m_lengths = dashed ;
 533         m_count = WXSIZEOF(dashed);
 534         break;
 535
 536     case wxPENSTYLE_SHORT_DASH :
 537         m_lengths = short_dashed ;
 538         m_count = WXSIZEOF(short_dashed);
 539         break;
 540
 541     case wxPENSTYLE_DOT_DASH :
 542         m_lengths = dotted_dashed ;
 543         m_count = WXSIZEOF(dotted_dashed);
 544         break;
 545
 546     case wxPENSTYLE_USER_DASH :
 547         {
 548             wxDash *wxdashes ;
 549             m_count = m_pen.GetDashes( &wxdashes ) ;
 550             if ((wxdashes != NULL) && (m_count > 0))
 551             {
 552                 m_userLengths = new double[m_count] ;
 553                 for ( int i = 0 ; i < m_count ; ++i )
 554                 {
 555                     m_userLengths[i] = wxdashes[i] * dashUnit ;
 556
 557                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 558                         m_userLengths[i] = dashUnit + 2.0 ;
 559                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 560                         m_userLengths[i] = dashUnit ;
 561                 }
 562             }
 563             m_lengths = m_userLengths ;
 564         }
 565         break;
 566     case wxPENSTYLE_STIPPLE :
 567         {
 568             /*
 569             wxBitmap* bmp = pen.GetStipple();
 570             if ( bmp && bmp->IsOk() )
 571             {
 572             wxDELETE( m_penImage );
 573             wxDELETE( m_penBrush );
 574             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 575             m_penBrush = new TextureBrush(m_penImage);
 576             m_pen->SetBrush( m_penBrush );
 577             }
 578             */
 579         }
 580         break;
 581     default :
 582         if ( m_pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH
 583             && m_pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
 584         {
 585             /*
 586             wxDELETE( m_penBrush );
 587             HatchStyle style = HatchStyleHorizontal;
 588             switch( pen.GetStyle() )
 589             {
 590             case wxPENSTYLE_BDIAGONAL_HATCH :
 591             style = HatchStyleBackwardDiagonal;
 592             break ;
 593             case wxPENSTYLE_CROSSDIAG_HATCH :
 594             style = HatchStyleDiagonalCross;
 595             break ;
 596             case wxPENSTYLE_FDIAGONAL_HATCH :
 597             style = HatchStyleForwardDiagonal;
 598             break ;
 599             case wxPENSTYLE_CROSS_HATCH :
 600             style = HatchStyleCross;
 601             break ;
 602             case wxPENSTYLE_HORIZONTAL_HATCH :
 603             style = HatchStyleHorizontal;
 604             break ;
 605             case wxPENSTYLE_VERTICAL_HATCH :
 606             style = HatchStyleVertical;
 607             break ;
 608
 609             }
 610             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 611             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 612             m_pen->SetBrush( m_penBrush )
 613             */
 614         }
 615         break;
 616     }
 617 }
 618
 619 void wxCairoPenData::Apply( wxGraphicsContext* context )
 620 {
 621     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 622     cairo_set_line_width(ctext,m_width);
 623     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 624     cairo_set_line_cap(ctext,m_cap);
 625     cairo_set_line_join(ctext,m_join);
 626     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 627 }
 628
 629 //-----------------------------------------------------------------------------
 630 // wxCairoBrushData implementation
 631 //-----------------------------------------------------------------------------
 632
 633 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 634   : wxGraphicsObjectRefData( renderer )
 635 {
 636     Init();
 637 }
 638
 639 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
 640   : wxGraphicsObjectRefData(renderer)
 641 {
 642     Init();
 643
 644     m_red = brush.GetColour().Red()/255.0;
 645     m_green = brush.GetColour().Green()/255.0;
 646     m_blue = brush.GetColour().Blue()/255.0;
 647     m_alpha = brush.GetColour().Alpha()/255.0;
 648     /*
 649     if ( brush.GetStyle() == wxBRUSHSTYLE_SOLID)
 650     {
 651     m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 652     brush.GetColour().Green() , brush.GetColour().Blue() ) );
 653     }
 654     else if ( brush.IsHatch() )
 655     {
 656     HatchStyle style = HatchStyleHorizontal;
 657     switch( brush.GetStyle() )
 658     {
 659     case wxBRUSHSTYLE_BDIAGONAL_HATCH :
 660     style = HatchStyleBackwardDiagonal;
 661     break ;
 662     case wxBRUSHSTYLE_CROSSDIAG_HATCH :
 663     style = HatchStyleDiagonalCross;
 664     break ;
 665     case wxBRUSHSTYLE_FDIAGONAL_HATCH :
 666     style = HatchStyleForwardDiagonal;
 667     break ;
 668     case wxBRUSHSTYLE_CROSS_HATCH :
 669     style = HatchStyleCross;
 670     break ;
 671     case wxBRUSHSTYLE_HORIZONTAL_HATCH :
 672     style = HatchStyleHorizontal;
 673     break ;
 674     case wxBRUSHSTYLE_VERTICAL_HATCH :
 675     style = HatchStyleVertical;
 676     break ;
 677
 678     }
 679     m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 680     brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 681     }
 682     else
 683     {
 684     wxBitmap* bmp = brush.GetStipple();
 685     if ( bmp && bmp->IsOk() )
 686     {
 687     wxDELETE( m_brushImage );
 688     m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 689     m_brush = new TextureBrush(m_brushImage);
 690     }
 691     }
 692     */
 693 }
 694
 695 wxCairoBrushData::~wxCairoBrushData ()
 696 {
 697     if (m_brushPattern)
 698         cairo_pattern_destroy(m_brushPattern);
 699 }
 700
 701 void wxCairoBrushData::Apply( wxGraphicsContext* context )
 702 {
 703     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 704     if ( m_brushPattern )
 705     {
 706         cairo_set_source(ctext,m_brushPattern);
 707     }
 708     else
 709     {
 710         cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 711     }
 712 }
 713
 714 void wxCairoBrushData::AddGradientStops(const wxGraphicsGradientStops& stops)
 715 {
 716     // loop over all the stops, they include the beginning and ending ones
 717     const unsigned numStops = stops.GetCount();
 718     for ( unsigned n = 0; n < numStops; n++ )
 719     {
 720         const wxGraphicsGradientStop stop = stops.Item(n);
 721
 722         const wxColour col = stop.GetColour();
 723
 724         cairo_pattern_add_color_stop_rgba
 725         (
 726             m_brushPattern,
 727             stop.GetPosition(),
 728             col.Red()/255.0,
 729             col.Green()/255.0,
 730             col.Blue()/255.0,
 731             col.Alpha()/255.0
 732         );
 733     }
 734
 735     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS,
 736                  wxT("Couldn't create cairo pattern"));
 737 }
 738
 739 void
 740 wxCairoBrushData::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 741                                             wxDouble x2, wxDouble y2,
 742                                             const wxGraphicsGradientStops& stops)
 743 {
 744     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 745
 746     AddGradientStops(stops);
 747 }
 748
 749 void
 750 wxCairoBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 751                                             wxDouble xc, wxDouble yc,
 752                                             wxDouble radius,
 753                                             const wxGraphicsGradientStops& stops)
 754 {
 755     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 756
 757     AddGradientStops(stops);
 758 }
 759
 760 void wxCairoBrushData::Init()
 761 {
 762     m_brushPattern = NULL;
 763 }
 764
 765 //-----------------------------------------------------------------------------
 766 // wxCairoFontData implementation
 767 //-----------------------------------------------------------------------------
 768
 769 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 770                          const wxColour& col ) : wxGraphicsObjectRefData(renderer)
 771 {
 772     m_red = col.Red()/255.0;
 773     m_green = col.Green()/255.0;
 774     m_blue = col.Blue()/255.0;
 775     m_alpha = col.Alpha()/255.0;
 776     m_size = font.GetPointSize();
 777     m_underlined = font.GetUnderlined();
 778
 779 #ifdef __WXMAC__
 780     m_font = cairo_quartz_font_face_create_for_cgfont( font.OSXGetCGFont() );
 781 #elif defined(__WXGTK__)
 782     m_font = pango_font_description_copy( font.GetNativeFontInfo()->description );
 783 #else
 784     m_fontName = font.GetFaceName().mb_str(wxConvUTF8);
 785     m_slant = font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL;
 786     m_weight = font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL;
 787 #endif
 788 }
 789
 790 wxCairoFontData::~wxCairoFontData()
 791 {
 792 #ifdef __WXMAC__
 793     cairo_font_face_destroy( m_font );
 794 #elif defined(__WXGTK__)
 795     pango_font_description_free( m_font );
 796 #else
 797 #endif
 798 }
 799
 800 void wxCairoFontData::Apply( wxGraphicsContext* context )
 801 {
 802     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 803     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 804 #ifdef __WXGTK__
 805     // the rest is done using Pango layouts
 806 #elif defined(__WXMAC__)
 807     cairo_set_font_face(ctext, m_font);
 808     cairo_set_font_size(ctext, m_size );
 809 #else
 810     cairo_select_font_face(ctext, m_fontName, m_slant, m_weight );
 811     cairo_set_font_size(ctext, m_size );
 812 #endif
 813 }
 814
 815 //-----------------------------------------------------------------------------
 816 // wxCairoPathData implementation
 817 //-----------------------------------------------------------------------------
 818
 819 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
 820     : wxGraphicsPathData(renderer)
 821 {
 822     if (pathcontext)
 823     {
 824         m_pathContext = pathcontext;
 825     }
 826     else
 827     {
 828         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 829         m_pathContext = cairo_create(surface);
 830         cairo_surface_destroy (surface);
 831     }
 832 }
 833
 834 wxCairoPathData::~wxCairoPathData()
 835 {
 836     cairo_destroy(m_pathContext);
 837 }
 838
 839 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
 840 {
 841     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 842     cairo_t* pathcontext = cairo_create(surface);
 843     cairo_surface_destroy (surface);
 844
 845     cairo_path_t* path = cairo_copy_path(m_pathContext);
 846     cairo_append_path(pathcontext, path);
 847     cairo_path_destroy(path);
 848     return new wxCairoPathData( GetRenderer() ,pathcontext);
 849 }
 850
 851
 852 void* wxCairoPathData::GetNativePath() const
 853 {
 854     return cairo_copy_path(m_pathContext) ;
 855 }
 856
 857 void wxCairoPathData::UnGetNativePath(void *p) const
 858 {
 859     cairo_path_destroy((cairo_path_t*)p);
 860 }
 861
 862 //
 863 // The Primitives
 864 //
 865
 866 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
 867 {
 868     cairo_move_to(m_pathContext,x,y);
 869 }
 870
 871 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
 872 {
 873     cairo_line_to(m_pathContext,x,y);
 874 }
 875
 876 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
 877 {
 878     cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
 879     cairo_append_path(m_pathContext, p);
 880     UnGetNativePath(p);
 881 }
 882
 883 void wxCairoPathData::CloseSubpath()
 884 {
 885     cairo_close_path(m_pathContext);
 886 }
 887
 888 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 889 {
 890     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
 891 }
 892
 893 // gets the last point of the current path, (0,0) if not yet set
 894 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
 895 {
 896     double dx,dy;
 897     cairo_get_current_point(m_pathContext,&dx,&dy);
 898     if (x)
 899         *x = dx;
 900     if (y)
 901         *y = dy;
 902 }
 903
 904 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 905 {
 906     // as clockwise means positive in our system (y pointing downwards)
 907     // TODO make this interpretation dependent of the
 908     // real device trans
 909     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
 910         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
 911     else
 912         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
 913 }
 914
 915 // transforms each point of this path by the matrix
 916 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
 917 {
 918     // as we don't have a true path object, we have to apply the inverse
 919     // matrix to the context
 920     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
 921     cairo_matrix_invert( &m );
 922     cairo_transform(m_pathContext,&m);
 923 }
 924
 925 // gets the bounding box enclosing all points (possibly including control points)
 926 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
 927 {
 928     double x1,y1,x2,y2;
 929
 930     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
 931     if ( x2 < x1 )
 932     {
 933         *x = x2;
 934         *w = x1-x2;
 935     }
 936     else
 937     {
 938         *x = x1;
 939         *w = x2-x1;
 940     }
 941
 942     if( y2 < y1 )
 943     {
 944         *y = y2;
 945         *h = y1-y2;
 946     }
 947     else
 948     {
 949         *y = y1;
 950         *h = y2-y1;
 951     }
 952 }
 953
 954 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle ) const
 955 {
 956     cairo_set_fill_rule(m_pathContext,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
 957     return cairo_in_fill( m_pathContext, x, y) != 0;
 958 }
 959
 960 //-----------------------------------------------------------------------------
 961 // wxCairoMatrixData implementation
 962 //-----------------------------------------------------------------------------
 963
 964 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
 965     : wxGraphicsMatrixData(renderer)
 966 {
 967     if ( matrix )
 968         m_matrix = *matrix;
 969 }
 970
 971 wxCairoMatrixData::~wxCairoMatrixData()
 972 {
 973     // nothing to do
 974 }
 975
 976 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
 977 {
 978     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
 979 }
 980
 981 // concatenates the matrix
 982 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
 983 {
 984     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
 985 }
 986
 987 // sets the matrix to the respective values
 988 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
 989                         wxDouble tx, wxDouble ty)
 990 {
 991     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
 992 }
 993
 994 // gets the component valuess of the matrix
 995 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
 996                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
 997 {
 998     if (a)  *a = m_matrix.xx;
 999     if (b)  *b = m_matrix.yx;
1000     if (c)  *c = m_matrix.xy;
1001     if (d)  *d = m_matrix.yy;
1002     if (tx) *tx= m_matrix.x0;
1003     if (ty) *ty= m_matrix.y0;
1004 }
1005
1006 // makes this the inverse matrix
1007 void wxCairoMatrixData::Invert()
1008 {
1009     cairo_matrix_invert( &m_matrix );
1010 }
1011
1012 // returns true if the elements of the transformation matrix are equal ?
1013 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
1014 {
1015     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
1016     return (
1017         m_matrix.xx == tm->xx &&
1018         m_matrix.yx == tm->yx &&
1019         m_matrix.xy == tm->xy &&
1020         m_matrix.yy == tm->yy &&
1021         m_matrix.x0 == tm->x0 &&
1022         m_matrix.y0 == tm->y0 ) ;
1023 }
1024
1025 // return true if this is the identity matrix
1026 bool wxCairoMatrixData::IsIdentity() const
1027 {
1028     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
1029         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
1030 }
1031
1032 //
1033 // transformation
1034 //
1035
1036 // add the translation to this matrix
1037 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
1038 {
1039     cairo_matrix_translate( &m_matrix, dx, dy) ;
1040 }
1041
1042 // add the scale to this matrix
1043 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
1044 {
1045     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
1046 }
1047
1048 // add the rotation to this matrix (radians)
1049 void wxCairoMatrixData::Rotate( wxDouble angle )
1050 {
1051     cairo_matrix_rotate( &m_matrix, angle) ;
1052 }
1053
1054 //
1055 // apply the transforms
1056 //
1057
1058 // applies that matrix to the point
1059 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
1060 {
1061     double lx = *x, ly = *y ;
1062     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
1063     *x = lx;
1064     *y = ly;
1065 }
1066
1067 // applies the matrix except for translations
1068 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1069 {
1070     double lx = *dx, ly = *dy ;
1071     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1072     *dx = lx;
1073     *dy = ly;
1074 }
1075
1076 // returns the native representation
1077 void * wxCairoMatrixData::GetNativeMatrix() const
1078 {
1079     return (void*) &m_matrix;
1080 }
1081
1082 // ----------------------------------------------------------------------------
1083 // wxCairoBitmap implementation
1084 // ----------------------------------------------------------------------------
1085
1086 int wxCairoBitmapData::InitBuffer(int width, int height, cairo_format_t format)
1087 {
1088     wxUnusedVar(format); // Only really unused with Cairo < 1.6.
1089
1090     // Determine the stride: use cairo_format_stride_for_width() if available
1091     // but fall back to 4*width for the earlier versions as this is what that
1092     // function always returns, even in latest Cairo, anyhow.
1093     int stride;
1094 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 6, 0)
1095     if ( cairo_version() >= CAIRO_VERSION_ENCODE(1, 6, 0) )
1096     {
1097         stride = cairo_format_stride_for_width(format, width);
1098
1099         // All our code would totally break if stride were not a multiple of 4
1100         // so ensure this is the case.
1101         if ( stride % 4 )
1102         {
1103             wxFAIL_MSG("Unexpected Cairo image surface stride.");
1104
1105             stride += 4 - stride % 4;
1106         }
1107     }
1108     else
1109 #endif
1110         stride = 4*width;
1111
1112     m_width = width;
1113     m_height = height;
1114     m_buffer = new unsigned char[height*stride];
1115
1116     return stride;
1117 }
1118
1119 void wxCairoBitmapData::InitSurface(cairo_format_t format, int stride)
1120 {
1121     m_surface = cairo_image_surface_create_for_data(
1122                             m_buffer, format, m_width, m_height, stride);
1123     m_pattern = cairo_pattern_create_for_surface(m_surface);
1124 }
1125
1126 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap ) :
1127     wxGraphicsObjectRefData( renderer )
1128 {
1129     m_surface = bitmap;
1130     m_pattern = cairo_pattern_create_for_surface(m_surface);
1131 }
1132
1133 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp ) : wxGraphicsObjectRefData( renderer )
1134 {
1135     wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1136
1137 #ifdef wxHAS_RAW_BITMAP
1138     // Create a surface object and copy the bitmap pixel data to it.  if the
1139     // image has alpha (or a mask represented as alpha) then we'll use a
1140     // different format and iterator than if it doesn't...
1141     const cairo_format_t bufferFormat = bmp.GetDepth() == 32
1142 #ifdef __WXGTK__
1143                                             || bmp.GetMask()
1144 #endif
1145                                         ? CAIRO_FORMAT_ARGB32
1146                                         : CAIRO_FORMAT_RGB24;
1147
1148     int stride = InitBuffer(bmp.GetWidth(), bmp.GetHeight(), bufferFormat);
1149
1150     int bw = m_width;
1151     int bh = m_height;
1152     wxBitmap bmpSource = bmp;  // we need a non-const instance
1153     wxUint32* data = (wxUint32*)m_buffer;
1154
1155     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1156     {
1157         // use the bitmap's alpha
1158         wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1159         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1160
1161         wxAlphaPixelData::Iterator p(pixData);
1162         for (int y=0; y<bh; y++)
1163         {
1164             wxAlphaPixelData::Iterator rowStart = p;
1165             wxUint32* const rowStartDst = data;
1166             for (int x=0; x<bw; x++)
1167             {
1168                 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1169                 // with alpha in the upper 8 bits, then red, then green, then
1170                 // blue. The 32-bit quantities are stored native-endian.
1171                 // Pre-multiplied alpha is used.
1172                 unsigned char alpha = p.Alpha();
1173                 if (alpha == 0)
1174                     *data = 0;
1175                 else
1176                     *data = ( alpha                      << 24
1177                               | (p.Red() * alpha/255)    << 16
1178                               | (p.Green() * alpha/255)  <<  8
1179                               | (p.Blue() * alpha/255) );
1180                 ++data;
1181                 ++p;
1182             }
1183
1184             data = rowStartDst + stride / 4;
1185             p = rowStart;
1186             p.OffsetY(pixData, 1);
1187         }
1188     }
1189     else  // no alpha
1190     {
1191         wxNativePixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1192         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1193
1194         wxNativePixelData::Iterator p(pixData);
1195         for (int y=0; y<bh; y++)
1196         {
1197             wxNativePixelData::Iterator rowStart = p;
1198             wxUint32* const rowStartDst = data;
1199             for (int x=0; x<bw; x++)
1200             {
1201                 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1202                 // the upper 8 bits unused. Red, Green, and Blue are stored in
1203                 // the remaining 24 bits in that order.  The 32-bit quantities
1204                 // are stored native-endian.
1205                 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1206                 ++data;
1207                 ++p;
1208             }
1209
1210             data = rowStartDst + stride / 4;
1211             p = rowStart;
1212             p.OffsetY(pixData, 1);
1213         }
1214     }
1215 #ifdef __WXMSW__
1216     // if there is a mask, set the alpha bytes in the target buffer to
1217     // fully transparent or fully opaque
1218     if (bmpSource.GetMask())
1219     {
1220         wxBitmap bmpMask = bmpSource.GetMaskBitmap();
1221         bufferFormat = CAIRO_FORMAT_ARGB32;
1222         data = (wxUint32*)m_buffer;
1223         wxNativePixelData pixData(bmpMask, wxPoint(0,0), wxSize(bw, bh));
1224         wxCHECK_RET( pixData, wxT("Failed to gain raw access to mask bitmap data."));
1225
1226         wxNativePixelData::Iterator p(pixData);
1227         for (int y=0; y<bh; y++)
1228         {
1229             wxNativePixelData::Iterator rowStart = p;
1230             wxUint32* const rowStartDst = data;
1231             for (int x=0; x<bw; x++)
1232             {
1233                 if (p.Red()+p.Green()+p.Blue() == 0)
1234                     *data = 0;
1235                 else
1236                     *data = (wxALPHA_OPAQUE << 24) | (*data & 0x00FFFFFF);
1237                 ++data;
1238                 ++p;
1239             }
1240
1241             data = rowStartDst + stride / 4;
1242             p = rowStart;
1243             p.OffsetY(pixData, 1);
1244         }
1245     }
1246 #endif
1247
1248     InitSurface(bufferFormat, stride);
1249 #endif // wxHAS_RAW_BITMAP
1250 }
1251
1252 wxCairoBitmapData::~wxCairoBitmapData()
1253 {
1254     if (m_pattern)
1255         cairo_pattern_destroy(m_pattern);
1256
1257     if (m_surface)
1258         cairo_surface_destroy(m_surface);
1259
1260     delete [] m_buffer;
1261 }
1262
1263
1264
1265 //-----------------------------------------------------------------------------
1266 // wxCairoContext implementation
1267 //-----------------------------------------------------------------------------
1268
1269 class wxCairoOffsetHelper
1270 {
1271 public :
1272     wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1273     {
1274         m_ctx = ctx;
1275         m_offset = offset;
1276         if ( m_offset )
1277              cairo_translate( m_ctx, 0.5, 0.5 );
1278     }
1279     ~wxCairoOffsetHelper( )
1280     {
1281         if ( m_offset )
1282             cairo_translate( m_ctx, -0.5, -0.5 );
1283     }
1284 public :
1285     cairo_t* m_ctx;
1286     bool m_offset;
1287 } ;
1288
1289 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1290 : wxGraphicsContext(renderer)
1291 {
1292 #ifdef __WXMSW__
1293     // wxMSW contexts always use MM_ANISOTROPIC, which messes up
1294     // text rendering when printing using Cairo. Switch it to MM_TEXT
1295     // map mode to avoid this problem.
1296     HDC hdc = (HDC)dc.GetHDC();
1297     ::SetMapMode(hdc, MM_TEXT);
1298     m_mswSurface = cairo_win32_printing_surface_create(hdc);
1299     Init( cairo_create(m_mswSurface) );
1300 #endif
1301
1302 #ifdef __WXGTK20__
1303     const wxDCImpl *impl = dc.GetImpl();
1304     Init( (cairo_t*) impl->GetCairoContext() );
1305 #endif
1306     wxSize sz = dc.GetSize();
1307     m_width = sz.x;
1308     m_height = sz.y;
1309
1310     wxPoint org = dc.GetDeviceOrigin();
1311     cairo_translate( m_context, org.x, org.y );
1312
1313     double sx,sy;
1314     dc.GetUserScale( &sx, &sy );
1315
1316 // TODO: Determine if these fixes are needed on other platforms too.
1317 // On MSW, without this the printer context will not respect wxDC SetMapMode calls.
1318 // For example, using dc.SetMapMode(wxMM_POINTS) can let us share printer and screen
1319 // drawing code
1320 #ifdef __WXMSW__
1321     double lsx,lsy;
1322     dc.GetLogicalScale( &lsx, &lsy );
1323     sx *= lsx;
1324     sy *= lsy;
1325 #endif
1326     cairo_scale( m_context, sx, sy );
1327
1328     org = dc.GetLogicalOrigin();
1329     cairo_translate( m_context, -org.x, -org.y );
1330 }
1331
1332 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1333 : wxGraphicsContext(renderer)
1334 {
1335     int width, height;
1336     dc.GetSize( &width, &height );
1337     m_width = width;
1338     m_height = height;
1339
1340     m_enableOffset = true;
1341
1342 #ifdef __WXMSW__
1343     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1344     Init( cairo_create(m_mswSurface) );
1345 #endif
1346
1347 #ifdef __WXGTK20__
1348     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1349     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1350
1351 #if 0
1352     wxGraphicsMatrix matrix = CreateMatrix();
1353
1354     wxPoint org = dc.GetDeviceOrigin();
1355     matrix.Translate( org.x, org.y );
1356
1357     org = dc.GetLogicalOrigin();
1358     matrix.Translate( -org.x, -org.y );
1359
1360     double sx,sy;
1361     dc.GetUserScale( &sx, &sy );
1362     matrix.Scale( sx, sy );
1363
1364     ConcatTransform( matrix );
1365 #endif
1366 #endif
1367
1368 #ifdef __WXMAC__
1369     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1370     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1371     Init( cairo_create( surface ) );
1372     cairo_surface_destroy( surface );
1373 #endif
1374 }
1375
1376 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1377 : wxGraphicsContext(renderer)
1378 {
1379     int width, height;
1380     dc.GetSize( &width, &height );
1381     m_width = width;
1382     m_height = height;
1383
1384     m_enableOffset = true;
1385
1386 #ifdef __WXMSW__
1387     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1388     Init( cairo_create(m_mswSurface) );
1389 #endif
1390
1391 #ifdef __WXGTK20__
1392     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1393     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1394
1395 #if 0
1396     wxGraphicsMatrix matrix = CreateMatrix();
1397
1398     wxPoint org = dc.GetDeviceOrigin();
1399     matrix.Translate( org.x, org.y );
1400
1401     org = dc.GetLogicalOrigin();
1402     matrix.Translate( -org.x, -org.y );
1403
1404     double sx,sy;
1405     dc.GetUserScale( &sx, &sy );
1406     matrix.Scale( sx, sy );
1407
1408     ConcatTransform( matrix );
1409 #endif
1410 #endif
1411
1412 #ifdef __WXMAC__
1413     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1414     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1415     Init( cairo_create( surface ) );
1416     cairo_surface_destroy( surface );
1417 #endif
1418 }
1419
1420 #ifdef __WXGTK20__
1421 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
1422 : wxGraphicsContext(renderer)
1423 {
1424     Init( gdk_cairo_create( drawable ) );
1425
1426     int width, height;
1427     gdk_drawable_get_size( drawable, &width, &height );
1428     m_width = width;
1429     m_height = height;
1430 }
1431 #endif
1432
1433 #ifdef __WXMSW__
1434 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, HDC handle )
1435 : wxGraphicsContext(renderer)
1436 {
1437     m_mswSurface = cairo_win32_surface_create(handle);
1438     Init( cairo_create(m_mswSurface) );
1439     m_width =
1440     m_height = 0;
1441 }
1442 #endif
1443
1444
1445 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1446 : wxGraphicsContext(renderer)
1447 {
1448     Init( context );
1449     m_width =
1450     m_height = 0;
1451 }
1452
1453 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1454 : wxGraphicsContext(renderer)
1455 {
1456     m_enableOffset = true;
1457 #ifdef __WXGTK__
1458     // something along these lines (copied from dcclient)
1459
1460     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1461     // code should still be able to create wxClientDCs for them, so we will
1462     // use the parent window here then.
1463     if (window->m_wxwindow == NULL)
1464     {
1465         window = window->GetParent();
1466     }
1467
1468     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1469
1470     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1471
1472     wxSize sz = window->GetSize();
1473     m_width = sz.x;
1474     m_height = sz.y;
1475 #endif
1476
1477 #ifdef __WXMSW__
1478     m_mswSurface = cairo_win32_surface_create((HDC)window->GetHandle());
1479     Init(cairo_create(m_mswSurface));
1480 #endif
1481
1482 }
1483
1484 wxCairoContext::~wxCairoContext()
1485 {
1486     if ( m_context )
1487     {
1488         PopState();
1489         PopState();
1490         cairo_destroy(m_context);
1491     }
1492 #ifdef __WXMSW__
1493     if ( m_mswSurface )
1494         cairo_surface_destroy(m_mswSurface);
1495 #endif
1496 }
1497
1498 void wxCairoContext::Init(cairo_t *context)
1499 {
1500     m_context = context ;
1501     PushState();
1502     PushState();
1503 }
1504
1505
1506 void wxCairoContext::Clip( const wxRegion& region )
1507 {
1508     // Create a path with all the rectangles in the region
1509     wxGraphicsPath path = GetRenderer()->CreatePath();
1510     wxRegionIterator ri(region);
1511     while (ri)
1512     {
1513         path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1514         ++ri;
1515     }
1516
1517     // Put it in the context
1518     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1519     cairo_append_path(m_context, cp);
1520
1521     // clip to that path
1522     cairo_clip(m_context);
1523     path.UnGetNativePath(cp);
1524 }
1525
1526 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1527 {
1528     // Create a path with this rectangle
1529     wxGraphicsPath path = GetRenderer()->CreatePath();
1530     path.AddRectangle(x,y,w,h);
1531
1532     // Put it in the context
1533     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1534     cairo_append_path(m_context, cp);
1535
1536     // clip to that path
1537     cairo_clip(m_context);
1538     path.UnGetNativePath(cp);
1539 }
1540
1541 void wxCairoContext::ResetClip()
1542 {
1543     cairo_reset_clip(m_context);
1544 }
1545
1546
1547 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1548 {
1549     if ( !m_pen.IsNull() )
1550     {
1551         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1552         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1553         cairo_append_path(m_context,cp);
1554         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1555         cairo_stroke(m_context);
1556         path.UnGetNativePath(cp);
1557     }
1558 }
1559
1560 void wxCairoContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1561 {
1562     if ( !m_brush.IsNull() )
1563     {
1564         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1565         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1566         cairo_append_path(m_context,cp);
1567         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1568         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1569         cairo_fill(m_context);
1570         path.UnGetNativePath(cp);
1571     }
1572 }
1573
1574 void wxCairoContext::Rotate( wxDouble angle )
1575 {
1576     cairo_rotate(m_context,angle);
1577 }
1578
1579 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1580 {
1581     cairo_translate(m_context,dx,dy);
1582 }
1583
1584 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1585 {
1586     cairo_scale(m_context,xScale,yScale);
1587 }
1588
1589 // concatenates this transform with the current transform of this context
1590 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1591 {
1592     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1593 }
1594
1595 // sets the transform of this context
1596 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1597 {
1598     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1599 }
1600
1601 // gets the matrix of this context
1602 wxGraphicsMatrix wxCairoContext::GetTransform() const
1603 {
1604     wxGraphicsMatrix matrix = CreateMatrix();
1605     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1606     return matrix;
1607 }
1608
1609
1610
1611 void wxCairoContext::PushState()
1612 {
1613     cairo_save(m_context);
1614 }
1615
1616 void wxCairoContext::PopState()
1617 {
1618     cairo_restore(m_context);
1619 }
1620
1621 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1622 {
1623     wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp);
1624     DrawBitmap(bitmap, x, y, w, h);
1625
1626 }
1627
1628 void wxCairoContext::DrawBitmap(const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1629 {
1630     PushState();
1631
1632     // In case we're scaling the image by using a width and height different
1633     // than the bitmap's size create a pattern transformation on the surface and
1634     // draw the transformed pattern.
1635     wxCairoBitmapData* data = static_cast<wxCairoBitmapData*>(bmp.GetRefData());
1636     cairo_pattern_t* pattern = data->GetCairoPattern();
1637     wxSize size = data->GetSize();
1638
1639     wxDouble scaleX = w / size.GetWidth();
1640     wxDouble scaleY = h / size.GetHeight();
1641
1642     // prepare to draw the image
1643     cairo_translate(m_context, x, y);
1644     cairo_scale(m_context, scaleX, scaleY);
1645     cairo_set_source(m_context, pattern);
1646     // use the original size here since the context is scaled already...
1647     cairo_rectangle(m_context, 0, 0, size.GetWidth(), size.GetHeight());
1648     // fill the rectangle using the pattern
1649     cairo_fill(m_context);
1650
1651     PopState();
1652 }
1653
1654 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1655 {
1656     // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
1657     // start using the Cairo backend on other platforms then we may need to
1658     // fiddle with this...
1659     DrawBitmap(icon, x, y, w, h);
1660 }
1661
1662
1663 void wxCairoContext::DoDrawText(const wxString& str, wxDouble x, wxDouble y)
1664 {
1665     wxCHECK_RET( !m_font.IsNull(),
1666                  wxT("wxCairoContext::DrawText - no valid font set") );
1667
1668     if ( str.empty())
1669         return;
1670
1671     const wxCharBuffer data = str.utf8_str();
1672     if ( !data )
1673         return;
1674
1675     ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
1676
1677 #ifdef __WXGTK__
1678     size_t datalen = strlen(data);
1679
1680     PangoLayout *layout = pango_cairo_create_layout (m_context);
1681     wxCairoFontData* font_data = (wxCairoFontData*) m_font.GetRefData();
1682     pango_layout_set_font_description( layout, font_data->GetFont());
1683     pango_layout_set_text(layout, data, datalen);
1684
1685     if (font_data->GetUnderlined())
1686     {
1687         PangoAttrList *attrs = pango_attr_list_new();
1688         PangoAttribute *attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
1689         pango_attr_list_insert(attrs, attr);
1690         pango_layout_set_attributes(layout, attrs);
1691         pango_attr_list_unref(attrs);
1692     }
1693
1694     cairo_move_to(m_context, x, y);
1695     pango_cairo_show_layout (m_context, layout);
1696
1697     g_object_unref (layout);
1698 #else
1699     // Cairo's x,y for drawing text is at the baseline, so we need to adjust
1700     // the position we move to by the ascent.
1701     cairo_font_extents_t fe;
1702     cairo_font_extents(m_context, &fe);
1703     cairo_move_to(m_context, x, y+fe.ascent);
1704
1705     cairo_show_text(m_context, data);
1706 #endif
1707 }
1708
1709 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1710                                     wxDouble *descent, wxDouble *externalLeading ) const
1711 {
1712     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
1713
1714     if ( width )
1715         *width = 0;
1716     if ( height )
1717         *height = 0;
1718     if ( descent )
1719         *descent = 0;
1720     if ( externalLeading )
1721         *externalLeading = 0;
1722
1723     if ( str.empty())
1724         return;
1725
1726 #ifdef __WXGTK__
1727     int w, h;
1728
1729     PangoLayout *layout = pango_cairo_create_layout (m_context);
1730     pango_layout_set_font_description( layout, ((wxCairoFontData*)m_font.GetRefData())->GetFont());
1731     const wxCharBuffer data = str.utf8_str();
1732     if ( !data )
1733     {
1734         return;
1735     }
1736     pango_layout_set_text( layout, data, strlen(data) );
1737     pango_layout_get_pixel_size (layout, &w, &h);
1738     if ( width )
1739         *width = w;
1740     if ( height )
1741         *height = h;
1742     if (descent)
1743     {
1744         PangoLayoutIter *iter = pango_layout_get_iter(layout);
1745         int baseline = pango_layout_iter_get_baseline(iter);
1746         pango_layout_iter_free(iter);
1747         *descent = h - PANGO_PIXELS(baseline);
1748     }
1749     g_object_unref (layout);
1750 #else
1751     ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this);
1752
1753     if (width)
1754     {
1755         const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
1756         cairo_text_extents_t te;
1757         cairo_text_extents(m_context, buf, &te);
1758         *width = te.width;
1759     }
1760
1761     if (height || descent || externalLeading)
1762     {
1763         cairo_font_extents_t fe;
1764         cairo_font_extents(m_context, &fe);
1765
1766         // some backends have negative descents
1767
1768         if ( fe.descent < 0 )
1769             fe.descent = -fe.descent;
1770
1771         if ( fe.height < (fe.ascent + fe.descent ) )
1772         {
1773             // some backends are broken re height ... (eg currently ATSUI)
1774             fe.height = fe.ascent + fe.descent;
1775         }
1776
1777         if (height)
1778             *height = fe.height;
1779         if ( descent )
1780             *descent = fe.descent;
1781         if ( externalLeading )
1782             *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
1783     }
1784 #endif
1785 }
1786
1787 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
1788 {
1789     widths.Empty();
1790     widths.Add(0, text.length());
1791
1792     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
1793
1794     if (text.empty())
1795         return;
1796
1797     // TODO
1798 }
1799
1800 void * wxCairoContext::GetNativeContext()
1801 {
1802     return m_context;
1803 }
1804
1805 bool wxCairoContext::SetAntialiasMode(wxAntialiasMode antialias)
1806 {
1807     if (m_antialias == antialias)
1808         return true;
1809
1810     m_antialias = antialias;
1811
1812     cairo_antialias_t antialiasMode;
1813     switch (antialias)
1814     {
1815         case wxANTIALIAS_DEFAULT:
1816             antialiasMode = CAIRO_ANTIALIAS_DEFAULT;
1817             break;
1818         case wxANTIALIAS_NONE:
1819             antialiasMode = CAIRO_ANTIALIAS_NONE;
1820             break;
1821         default:
1822             return false;
1823     }
1824     cairo_set_antialias(m_context, antialiasMode);
1825     return true;
1826 }
1827
1828 bool wxCairoContext::SetInterpolationQuality(wxInterpolationQuality WXUNUSED(interpolation))
1829 {
1830     // placeholder
1831     return false;
1832 }
1833
1834 bool wxCairoContext::SetCompositionMode(wxCompositionMode op)
1835 {
1836     if ( m_composition == op )
1837         return true;
1838
1839     m_composition = op;
1840     cairo_operator_t cop;
1841     switch (op)
1842     {
1843         case wxCOMPOSITION_CLEAR:
1844             cop = CAIRO_OPERATOR_CLEAR;
1845             break;
1846         case wxCOMPOSITION_SOURCE:
1847             cop = CAIRO_OPERATOR_SOURCE;
1848             break;
1849         case wxCOMPOSITION_OVER:
1850             cop = CAIRO_OPERATOR_OVER;
1851             break;
1852         case wxCOMPOSITION_IN:
1853             cop = CAIRO_OPERATOR_IN;
1854             break;
1855         case wxCOMPOSITION_OUT:
1856             cop = CAIRO_OPERATOR_OUT;
1857             break;
1858         case wxCOMPOSITION_ATOP:
1859             cop = CAIRO_OPERATOR_ATOP;
1860             break;
1861         case wxCOMPOSITION_DEST:
1862             cop = CAIRO_OPERATOR_DEST;
1863             break;
1864         case wxCOMPOSITION_DEST_OVER:
1865             cop = CAIRO_OPERATOR_DEST_OVER;
1866             break;
1867         case wxCOMPOSITION_DEST_IN:
1868             cop = CAIRO_OPERATOR_DEST_IN;
1869             break;
1870         case wxCOMPOSITION_DEST_OUT:
1871             cop = CAIRO_OPERATOR_DEST_OUT;
1872             break;
1873         case wxCOMPOSITION_DEST_ATOP:
1874             cop = CAIRO_OPERATOR_DEST_ATOP;
1875             break;
1876         case wxCOMPOSITION_XOR:
1877             cop = CAIRO_OPERATOR_XOR;
1878             break;
1879         case wxCOMPOSITION_ADD:
1880             cop = CAIRO_OPERATOR_ADD;
1881             break;
1882         default:
1883             return false;
1884     }
1885     cairo_set_operator(m_context, cop);
1886     return true;
1887 }
1888
1889 void wxCairoContext::BeginLayer(wxDouble opacity)
1890 {
1891     m_layerOpacities.push_back(opacity);
1892     cairo_push_group(m_context);
1893 }
1894
1895 void wxCairoContext::EndLayer()
1896 {
1897     float opacity = m_layerOpacities.back();
1898     m_layerOpacities.pop_back();
1899     cairo_pop_group_to_source(m_context);
1900     cairo_paint_with_alpha(m_context,opacity);
1901 }
1902
1903 //-----------------------------------------------------------------------------
1904 // wxCairoRenderer declaration
1905 //-----------------------------------------------------------------------------
1906
1907 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
1908 {
1909 public :
1910     wxCairoRenderer() {}
1911
1912     virtual ~wxCairoRenderer() {}
1913
1914     // Context
1915
1916     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
1917     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
1918     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
1919
1920     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
1921
1922     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
1923
1924     virtual wxGraphicsContext * CreateContext( wxWindow* window );
1925
1926     virtual wxGraphicsContext * CreateMeasuringContext();
1927 #ifdef __WXMSW__
1928 #if wxUSE_ENH_METAFILE
1929     virtual wxGraphicsContext * CreateContext( const wxEnhMetaFileDC& dc);
1930 #endif
1931 #endif
1932     // Path
1933
1934     virtual wxGraphicsPath CreatePath();
1935
1936     // Matrix
1937
1938     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
1939         wxDouble tx=0.0, wxDouble ty=0.0);
1940
1941
1942     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
1943
1944     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
1945
1946     virtual wxGraphicsBrush
1947     CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
1948                               wxDouble x2, wxDouble y2,
1949                               const wxGraphicsGradientStops& stops);
1950
1951     virtual wxGraphicsBrush
1952     CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
1953                               wxDouble xc, wxDouble yc,
1954                               wxDouble radius,
1955                               const wxGraphicsGradientStops& stops);
1956
1957     // sets the font
1958     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
1959
1960     // create a native bitmap representation
1961     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap );
1962
1963     // create a graphics bitmap from a native bitmap
1964     virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
1965
1966     // create a subimage from a native image representation
1967     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  );
1968
1969 protected :
1970     bool EnsureIsLoaded();
1971     void Load();
1972     void Unload();
1973     friend class wxCairoModule;
1974 private :
1975     int m_loaded;
1976     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
1977 } ;
1978
1979 //-----------------------------------------------------------------------------
1980 // wxCairoRenderer implementation
1981 //-----------------------------------------------------------------------------
1982
1983 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
1984
1985 static wxCairoRenderer gs_cairoGraphicsRenderer;
1986 // temporary hack to allow creating a cairo context on any platform
1987 extern wxGraphicsRenderer* gCairoRenderer;
1988 wxGraphicsRenderer* gCairoRenderer = &gs_cairoGraphicsRenderer;
1989
1990 bool wxCairoRenderer::EnsureIsLoaded()
1991 {
1992 #ifndef __WXGTK__
1993     Load();
1994     return wxCairoInit();
1995 #else
1996     return true;
1997 #endif
1998 }
1999
2000 void wxCairoRenderer::Load()
2001 {
2002     wxCairoInit();
2003 }
2004
2005 void wxCairoRenderer::Unload()
2006 {
2007     wxCairoCleanUp();
2008 }
2009
2010 // call EnsureIsLoaded() and return returnOnFail value if it fails
2011 #define ENSURE_LOADED_OR_RETURN(returnOnFail)  \
2012     if ( !EnsureIsLoaded() )                   \
2013         return (returnOnFail)
2014
2015 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
2016 {
2017     ENSURE_LOADED_OR_RETURN(NULL);
2018     return new wxCairoContext(this,dc);
2019 }
2020
2021 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
2022 {
2023     ENSURE_LOADED_OR_RETURN(NULL);
2024     return new wxCairoContext(this,dc);
2025 }
2026
2027 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
2028 {
2029     ENSURE_LOADED_OR_RETURN(NULL);
2030 #ifdef __WXGTK20__
2031     const wxDCImpl *impl = dc.GetImpl();
2032     cairo_t* context = (cairo_t*) impl->GetCairoContext();
2033     if (context)
2034        return new wxCairoContext(this,dc);
2035     else
2036 #endif
2037        return new wxCairoContext(this,dc);
2038 }
2039
2040 #ifdef __WXMSW__
2041 #if wxUSE_ENH_METAFILE
2042 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxEnhMetaFileDC& WXUNUSED(dc) )
2043 {
2044     ENSURE_LOADED_OR_RETURN(NULL);
2045     return NULL;
2046 }
2047 #endif
2048 #endif
2049
2050 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
2051 {
2052     ENSURE_LOADED_OR_RETURN(NULL);
2053 #ifdef __WXMSW__
2054     return new wxCairoContext(this,(HDC)context);
2055 #else
2056     return new wxCairoContext(this,(cairo_t*)context);
2057 #endif
2058 }
2059
2060
2061 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
2062 {
2063     ENSURE_LOADED_OR_RETURN(NULL);
2064 #ifdef __WXGTK__
2065     return new wxCairoContext(this,(GdkDrawable*)window);
2066 #else
2067     wxUnusedVar(window);
2068     return NULL;
2069 #endif
2070 }
2071
2072 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
2073 {
2074     ENSURE_LOADED_OR_RETURN(NULL);
2075 #ifdef __WXGTK__
2076     return CreateContextFromNativeWindow(gdk_get_default_root_window());
2077 #endif
2078     return NULL;
2079     // TODO
2080 }
2081
2082 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
2083 {
2084     ENSURE_LOADED_OR_RETURN(NULL);
2085     return new wxCairoContext(this, window );
2086 }
2087
2088 // Path
2089
2090 wxGraphicsPath wxCairoRenderer::CreatePath()
2091 {
2092     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPath);
2093     wxGraphicsPath path;
2094     path.SetRefData( new wxCairoPathData(this) );
2095     return path;
2096 }
2097
2098
2099 // Matrix
2100
2101 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
2102                                                 wxDouble tx, wxDouble ty)
2103
2104 {
2105     ENSURE_LOADED_OR_RETURN(wxNullGraphicsMatrix);
2106     wxGraphicsMatrix m;
2107     wxCairoMatrixData* data = new wxCairoMatrixData( this );
2108     data->Set( a,b,c,d,tx,ty ) ;
2109     m.SetRefData(data);
2110     return m;
2111 }
2112
2113 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
2114 {
2115     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPen);
2116     if ( !pen.IsOk() || pen.GetStyle() == wxPENSTYLE_TRANSPARENT )
2117         return wxNullGraphicsPen;
2118     else
2119     {
2120         wxGraphicsPen p;
2121         p.SetRefData(new wxCairoPenData( this, pen ));
2122         return p;
2123     }
2124 }
2125
2126 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
2127 {
2128     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2129     if ( !brush.IsOk() || brush.GetStyle() == wxBRUSHSTYLE_TRANSPARENT )
2130         return wxNullGraphicsBrush;
2131     else
2132     {
2133         wxGraphicsBrush p;
2134         p.SetRefData(new wxCairoBrushData( this, brush ));
2135         return p;
2136     }
2137 }
2138
2139 wxGraphicsBrush
2140 wxCairoRenderer::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2141                                            wxDouble x2, wxDouble y2,
2142                                            const wxGraphicsGradientStops& stops)
2143 {
2144     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2145     wxGraphicsBrush p;
2146     wxCairoBrushData* d = new wxCairoBrushData( this );
2147     d->CreateLinearGradientBrush(x1, y1, x2, y2, stops);
2148     p.SetRefData(d);
2149     return p;
2150 }
2151
2152 wxGraphicsBrush
2153 wxCairoRenderer::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2154                                            wxDouble xc, wxDouble yc, wxDouble r,
2155                                            const wxGraphicsGradientStops& stops)
2156 {
2157     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2158     wxGraphicsBrush p;
2159     wxCairoBrushData* d = new wxCairoBrushData( this );
2160     d->CreateRadialGradientBrush(xo, yo, xc, yc, r, stops);
2161     p.SetRefData(d);
2162     return p;
2163 }
2164
2165 // sets the font
2166 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
2167 {
2168     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
2169     if ( font.IsOk() )
2170     {
2171         wxGraphicsFont p;
2172         p.SetRefData(new wxCairoFontData( this , font, col ));
2173         return p;
2174     }
2175     else
2176         return wxNullGraphicsFont;
2177 }
2178
2179 wxGraphicsBitmap wxCairoRenderer::CreateBitmap( const wxBitmap& bmp )
2180 {
2181     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2182     if ( bmp.IsOk() )
2183     {
2184         wxGraphicsBitmap p;
2185         p.SetRefData(new wxCairoBitmapData( this , bmp ));
2186         return p;
2187     }
2188     else
2189         return wxNullGraphicsBitmap;
2190 }
2191
2192 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromNativeBitmap( void* bitmap )
2193 {
2194     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2195     if ( bitmap != NULL )
2196     {
2197         wxGraphicsBitmap p;
2198         p.SetRefData(new wxCairoBitmapData( this , (cairo_surface_t*) bitmap ));
2199         return p;
2200     }
2201     else
2202         return wxNullGraphicsBitmap;
2203 }
2204
2205 wxGraphicsBitmap
2206 wxCairoRenderer::CreateSubBitmap(const wxGraphicsBitmap& WXUNUSED(bitmap),
2207                                  wxDouble WXUNUSED(x),
2208                                  wxDouble WXUNUSED(y),
2209                                  wxDouble WXUNUSED(w),
2210                                  wxDouble WXUNUSED(h))
2211 {
2212     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2213     wxFAIL_MSG("wxCairoRenderer::CreateSubBitmap is not implemented.");
2214     return wxNullGraphicsBitmap;
2215 }
2216
2217 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2218 {
2219     return &gs_cairoGraphicsRenderer;
2220 }
2221
2222 #else // !wxUSE_CAIRO
2223
2224 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2225 {
2226     return NULL;
2227 }
2228
2229 #endif  // wxUSE_CAIRO/!wxUSE_CAIRO
2230
2231 // MSW and OS X have their own native default renderers, but the other ports
2232 // use Cairo by default
2233 #if !(defined(__WXMSW__) || defined(__WXOSX__))
2234 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
2235 {
2236     return GetCairoRenderer();
2237 }
2238 #endif // !(__WXMSW__ || __WXOSX__)
2239
2240 #endif // wxUSE_GRAPHICS_CONTEXT