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
 321 #if wxUSE_IMAGE
 322     wxImage ConvertToImage() const;
 323 #endif // wxUSE_IMAGE
 324
 325 private :
 326     // Allocate m_buffer for the bitmap of the given size in the given format.
 327     //
 328     // Returns the stride used for the buffer.
 329     int InitBuffer(int width, int height, cairo_format_t format);
 330
 331     // Really create the surface using the buffer (which was supposed to be
 332     // filled since InitBuffer() call).
 333     void InitSurface(cairo_format_t format, int stride);
 334
 335
 336     cairo_surface_t* m_surface;
 337     cairo_pattern_t* m_pattern;
 338     int m_width;
 339     int m_height;
 340     unsigned char* m_buffer;
 341 };
 342
 343 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
 344 {
 345 public:
 346     wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc );
 347     wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc );
 348     wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc );
 349 #ifdef __WXGTK__
 350     wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable );
 351 #endif
 352 #ifdef __WXMSW__
 353     wxCairoContext( wxGraphicsRenderer* renderer, HDC context );
 354 #endif
 355     wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context );
 356     wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window);
 357     wxCairoContext();
 358     virtual ~wxCairoContext();
 359
 360     virtual bool ShouldOffset() const
 361     {
 362         if ( !m_enableOffset )
 363             return false;
 364
 365         int penwidth = 0 ;
 366         if ( !m_pen.IsNull() )
 367         {
 368             penwidth = (int)((wxCairoPenData*)m_pen.GetRefData())->GetWidth();
 369             if ( penwidth == 0 )
 370                 penwidth = 1;
 371         }
 372         return ( penwidth % 2 ) == 1;
 373     }
 374
 375     virtual void Clip( const wxRegion &region );
 376 #ifdef __WXMSW__
 377     cairo_surface_t* m_mswSurface;
 378 #endif
 379
 380     // clips drawings to the rect
 381     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 382
 383     // resets the clipping to original extent
 384     virtual void ResetClip();
 385
 386     virtual void * GetNativeContext();
 387
 388     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
 389
 390     virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation);
 391
 392     virtual bool SetCompositionMode(wxCompositionMode op);
 393
 394     virtual void BeginLayer(wxDouble opacity);
 395
 396     virtual void EndLayer();
 397
 398     virtual void StrokePath( const wxGraphicsPath& p );
 399     virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxWINDING_RULE );
 400
 401     virtual void Translate( wxDouble dx , wxDouble dy );
 402     virtual void Scale( wxDouble xScale , wxDouble yScale );
 403     virtual void Rotate( wxDouble angle );
 404
 405     // concatenates this transform with the current transform of this context
 406     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 407
 408     // sets the transform of this context
 409     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 410
 411     // gets the matrix of this context
 412     virtual wxGraphicsMatrix GetTransform() const;
 413
 414     virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 415     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 416     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 417     virtual void PushState();
 418     virtual void PopState();
 419
 420     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 421                                 wxDouble *descent, wxDouble *externalLeading ) const;
 422     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 423
 424 protected:
 425     virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
 426
 427 private:
 428     void Init(cairo_t *context);
 429
 430     cairo_t* m_context;
 431
 432     wxVector<float> m_layerOpacities;
 433
 434     wxDECLARE_NO_COPY_CLASS(wxCairoContext);
 435 };
 436
 437 //-----------------------------------------------------------------------------
 438 // wxCairoPenData implementation
 439 //-----------------------------------------------------------------------------
 440
 441 wxCairoPenData::~wxCairoPenData()
 442 {
 443     delete[] m_userLengths;
 444 }
 445
 446 void wxCairoPenData::Init()
 447 {
 448     m_lengths = NULL;
 449     m_userLengths = NULL;
 450     m_width = 0;
 451     m_count = 0;
 452 }
 453
 454 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 455 : wxGraphicsObjectRefData(renderer)
 456 {
 457     Init();
 458     m_pen = pen;
 459     m_width = m_pen.GetWidth();
 460     if (m_width <= 0.0)
 461         m_width = 0.1;
 462
 463     m_red = m_pen.GetColour().Red()/255.0;
 464     m_green = m_pen.GetColour().Green()/255.0;
 465     m_blue = m_pen.GetColour().Blue()/255.0;
 466     m_alpha = m_pen.GetColour().Alpha()/255.0;
 467
 468     switch ( m_pen.GetCap() )
 469     {
 470     case wxCAP_ROUND :
 471         m_cap = CAIRO_LINE_CAP_ROUND;
 472         break;
 473
 474     case wxCAP_PROJECTING :
 475         m_cap = CAIRO_LINE_CAP_SQUARE;
 476         break;
 477
 478     case wxCAP_BUTT :
 479         m_cap = CAIRO_LINE_CAP_BUTT;
 480         break;
 481
 482     default :
 483         m_cap = CAIRO_LINE_CAP_BUTT;
 484         break;
 485     }
 486
 487     switch ( m_pen.GetJoin() )
 488     {
 489     case wxJOIN_BEVEL :
 490         m_join = CAIRO_LINE_JOIN_BEVEL;
 491         break;
 492
 493     case wxJOIN_MITER :
 494         m_join = CAIRO_LINE_JOIN_MITER;
 495         break;
 496
 497     case wxJOIN_ROUND :
 498         m_join = CAIRO_LINE_JOIN_ROUND;
 499         break;
 500
 501     default :
 502         m_join = CAIRO_LINE_JOIN_MITER;
 503         break;
 504     }
 505
 506     const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
 507     const double dotted[] =
 508     {
 509         dashUnit , dashUnit + 2.0
 510     };
 511     static const double short_dashed[] =
 512     {
 513         9.0 , 6.0
 514     };
 515     static const double dashed[] =
 516     {
 517         19.0 , 9.0
 518     };
 519     static const double dotted_dashed[] =
 520     {
 521         9.0 , 6.0 , 3.0 , 3.0
 522     };
 523
 524     switch ( m_pen.GetStyle() )
 525     {
 526     case wxPENSTYLE_SOLID :
 527         break;
 528
 529     case wxPENSTYLE_DOT :
 530         m_count = WXSIZEOF(dotted);
 531         m_userLengths = new double[ m_count ] ;
 532         memcpy( m_userLengths, dotted, sizeof(dotted) );
 533         m_lengths = m_userLengths;
 534         break;
 535
 536     case wxPENSTYLE_LONG_DASH :
 537         m_lengths = dashed ;
 538         m_count = WXSIZEOF(dashed);
 539         break;
 540
 541     case wxPENSTYLE_SHORT_DASH :
 542         m_lengths = short_dashed ;
 543         m_count = WXSIZEOF(short_dashed);
 544         break;
 545
 546     case wxPENSTYLE_DOT_DASH :
 547         m_lengths = dotted_dashed ;
 548         m_count = WXSIZEOF(dotted_dashed);
 549         break;
 550
 551     case wxPENSTYLE_USER_DASH :
 552         {
 553             wxDash *wxdashes ;
 554             m_count = m_pen.GetDashes( &wxdashes ) ;
 555             if ((wxdashes != NULL) && (m_count > 0))
 556             {
 557                 m_userLengths = new double[m_count] ;
 558                 for ( int i = 0 ; i < m_count ; ++i )
 559                 {
 560                     m_userLengths[i] = wxdashes[i] * dashUnit ;
 561
 562                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 563                         m_userLengths[i] = dashUnit + 2.0 ;
 564                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 565                         m_userLengths[i] = dashUnit ;
 566                 }
 567             }
 568             m_lengths = m_userLengths ;
 569         }
 570         break;
 571     case wxPENSTYLE_STIPPLE :
 572         {
 573             /*
 574             wxBitmap* bmp = pen.GetStipple();
 575             if ( bmp && bmp->IsOk() )
 576             {
 577             wxDELETE( m_penImage );
 578             wxDELETE( m_penBrush );
 579             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 580             m_penBrush = new TextureBrush(m_penImage);
 581             m_pen->SetBrush( m_penBrush );
 582             }
 583             */
 584         }
 585         break;
 586     default :
 587         if ( m_pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH
 588             && m_pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
 589         {
 590             /*
 591             wxDELETE( m_penBrush );
 592             HatchStyle style = HatchStyleHorizontal;
 593             switch( pen.GetStyle() )
 594             {
 595             case wxPENSTYLE_BDIAGONAL_HATCH :
 596             style = HatchStyleBackwardDiagonal;
 597             break ;
 598             case wxPENSTYLE_CROSSDIAG_HATCH :
 599             style = HatchStyleDiagonalCross;
 600             break ;
 601             case wxPENSTYLE_FDIAGONAL_HATCH :
 602             style = HatchStyleForwardDiagonal;
 603             break ;
 604             case wxPENSTYLE_CROSS_HATCH :
 605             style = HatchStyleCross;
 606             break ;
 607             case wxPENSTYLE_HORIZONTAL_HATCH :
 608             style = HatchStyleHorizontal;
 609             break ;
 610             case wxPENSTYLE_VERTICAL_HATCH :
 611             style = HatchStyleVertical;
 612             break ;
 613
 614             }
 615             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 616             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 617             m_pen->SetBrush( m_penBrush )
 618             */
 619         }
 620         break;
 621     }
 622 }
 623
 624 void wxCairoPenData::Apply( wxGraphicsContext* context )
 625 {
 626     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 627     cairo_set_line_width(ctext,m_width);
 628     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 629     cairo_set_line_cap(ctext,m_cap);
 630     cairo_set_line_join(ctext,m_join);
 631     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 632 }
 633
 634 //-----------------------------------------------------------------------------
 635 // wxCairoBrushData implementation
 636 //-----------------------------------------------------------------------------
 637
 638 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 639   : wxGraphicsObjectRefData( renderer )
 640 {
 641     Init();
 642 }
 643
 644 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
 645   : wxGraphicsObjectRefData(renderer)
 646 {
 647     Init();
 648
 649     m_red = brush.GetColour().Red()/255.0;
 650     m_green = brush.GetColour().Green()/255.0;
 651     m_blue = brush.GetColour().Blue()/255.0;
 652     m_alpha = brush.GetColour().Alpha()/255.0;
 653     /*
 654     if ( brush.GetStyle() == wxBRUSHSTYLE_SOLID)
 655     {
 656     m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 657     brush.GetColour().Green() , brush.GetColour().Blue() ) );
 658     }
 659     else if ( brush.IsHatch() )
 660     {
 661     HatchStyle style = HatchStyleHorizontal;
 662     switch( brush.GetStyle() )
 663     {
 664     case wxBRUSHSTYLE_BDIAGONAL_HATCH :
 665     style = HatchStyleBackwardDiagonal;
 666     break ;
 667     case wxBRUSHSTYLE_CROSSDIAG_HATCH :
 668     style = HatchStyleDiagonalCross;
 669     break ;
 670     case wxBRUSHSTYLE_FDIAGONAL_HATCH :
 671     style = HatchStyleForwardDiagonal;
 672     break ;
 673     case wxBRUSHSTYLE_CROSS_HATCH :
 674     style = HatchStyleCross;
 675     break ;
 676     case wxBRUSHSTYLE_HORIZONTAL_HATCH :
 677     style = HatchStyleHorizontal;
 678     break ;
 679     case wxBRUSHSTYLE_VERTICAL_HATCH :
 680     style = HatchStyleVertical;
 681     break ;
 682
 683     }
 684     m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 685     brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 686     }
 687     else
 688     {
 689     wxBitmap* bmp = brush.GetStipple();
 690     if ( bmp && bmp->IsOk() )
 691     {
 692     wxDELETE( m_brushImage );
 693     m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 694     m_brush = new TextureBrush(m_brushImage);
 695     }
 696     }
 697     */
 698 }
 699
 700 wxCairoBrushData::~wxCairoBrushData ()
 701 {
 702     if (m_brushPattern)
 703         cairo_pattern_destroy(m_brushPattern);
 704 }
 705
 706 void wxCairoBrushData::Apply( wxGraphicsContext* context )
 707 {
 708     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 709     if ( m_brushPattern )
 710     {
 711         cairo_set_source(ctext,m_brushPattern);
 712     }
 713     else
 714     {
 715         cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 716     }
 717 }
 718
 719 void wxCairoBrushData::AddGradientStops(const wxGraphicsGradientStops& stops)
 720 {
 721     // loop over all the stops, they include the beginning and ending ones
 722     const unsigned numStops = stops.GetCount();
 723     for ( unsigned n = 0; n < numStops; n++ )
 724     {
 725         const wxGraphicsGradientStop stop = stops.Item(n);
 726
 727         const wxColour col = stop.GetColour();
 728
 729         cairo_pattern_add_color_stop_rgba
 730         (
 731             m_brushPattern,
 732             stop.GetPosition(),
 733             col.Red()/255.0,
 734             col.Green()/255.0,
 735             col.Blue()/255.0,
 736             col.Alpha()/255.0
 737         );
 738     }
 739
 740     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS,
 741                  wxT("Couldn't create cairo pattern"));
 742 }
 743
 744 void
 745 wxCairoBrushData::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 746                                             wxDouble x2, wxDouble y2,
 747                                             const wxGraphicsGradientStops& stops)
 748 {
 749     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 750
 751     AddGradientStops(stops);
 752 }
 753
 754 void
 755 wxCairoBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 756                                             wxDouble xc, wxDouble yc,
 757                                             wxDouble radius,
 758                                             const wxGraphicsGradientStops& stops)
 759 {
 760     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 761
 762     AddGradientStops(stops);
 763 }
 764
 765 void wxCairoBrushData::Init()
 766 {
 767     m_brushPattern = NULL;
 768 }
 769
 770 //-----------------------------------------------------------------------------
 771 // wxCairoFontData implementation
 772 //-----------------------------------------------------------------------------
 773
 774 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 775                          const wxColour& col ) : wxGraphicsObjectRefData(renderer)
 776 {
 777     m_red = col.Red()/255.0;
 778     m_green = col.Green()/255.0;
 779     m_blue = col.Blue()/255.0;
 780     m_alpha = col.Alpha()/255.0;
 781     m_size = font.GetPointSize();
 782     m_underlined = font.GetUnderlined();
 783
 784 #ifdef __WXMAC__
 785     m_font = cairo_quartz_font_face_create_for_cgfont( font.OSXGetCGFont() );
 786 #elif defined(__WXGTK__)
 787     m_font = pango_font_description_copy( font.GetNativeFontInfo()->description );
 788 #else
 789     m_fontName = font.GetFaceName().mb_str(wxConvUTF8);
 790     m_slant = font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL;
 791     m_weight = font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL;
 792 #endif
 793 }
 794
 795 wxCairoFontData::~wxCairoFontData()
 796 {
 797 #ifdef __WXMAC__
 798     cairo_font_face_destroy( m_font );
 799 #elif defined(__WXGTK__)
 800     pango_font_description_free( m_font );
 801 #else
 802 #endif
 803 }
 804
 805 void wxCairoFontData::Apply( wxGraphicsContext* context )
 806 {
 807     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 808     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 809 #ifdef __WXGTK__
 810     // the rest is done using Pango layouts
 811 #elif defined(__WXMAC__)
 812     cairo_set_font_face(ctext, m_font);
 813     cairo_set_font_size(ctext, m_size );
 814 #else
 815     cairo_select_font_face(ctext, m_fontName, m_slant, m_weight );
 816     cairo_set_font_size(ctext, m_size );
 817 #endif
 818 }
 819
 820 //-----------------------------------------------------------------------------
 821 // wxCairoPathData implementation
 822 //-----------------------------------------------------------------------------
 823
 824 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
 825     : wxGraphicsPathData(renderer)
 826 {
 827     if (pathcontext)
 828     {
 829         m_pathContext = pathcontext;
 830     }
 831     else
 832     {
 833         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 834         m_pathContext = cairo_create(surface);
 835         cairo_surface_destroy (surface);
 836     }
 837 }
 838
 839 wxCairoPathData::~wxCairoPathData()
 840 {
 841     cairo_destroy(m_pathContext);
 842 }
 843
 844 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
 845 {
 846     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 847     cairo_t* pathcontext = cairo_create(surface);
 848     cairo_surface_destroy (surface);
 849
 850     cairo_path_t* path = cairo_copy_path(m_pathContext);
 851     cairo_append_path(pathcontext, path);
 852     cairo_path_destroy(path);
 853     return new wxCairoPathData( GetRenderer() ,pathcontext);
 854 }
 855
 856
 857 void* wxCairoPathData::GetNativePath() const
 858 {
 859     return cairo_copy_path(m_pathContext) ;
 860 }
 861
 862 void wxCairoPathData::UnGetNativePath(void *p) const
 863 {
 864     cairo_path_destroy((cairo_path_t*)p);
 865 }
 866
 867 //
 868 // The Primitives
 869 //
 870
 871 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
 872 {
 873     cairo_move_to(m_pathContext,x,y);
 874 }
 875
 876 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
 877 {
 878     cairo_line_to(m_pathContext,x,y);
 879 }
 880
 881 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
 882 {
 883     cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
 884     cairo_append_path(m_pathContext, p);
 885     UnGetNativePath(p);
 886 }
 887
 888 void wxCairoPathData::CloseSubpath()
 889 {
 890     cairo_close_path(m_pathContext);
 891 }
 892
 893 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 894 {
 895     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
 896 }
 897
 898 // gets the last point of the current path, (0,0) if not yet set
 899 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
 900 {
 901     double dx,dy;
 902     cairo_get_current_point(m_pathContext,&dx,&dy);
 903     if (x)
 904         *x = dx;
 905     if (y)
 906         *y = dy;
 907 }
 908
 909 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 910 {
 911     // as clockwise means positive in our system (y pointing downwards)
 912     // TODO make this interpretation dependent of the
 913     // real device trans
 914     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
 915         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
 916     else
 917         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
 918 }
 919
 920 // transforms each point of this path by the matrix
 921 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
 922 {
 923     // as we don't have a true path object, we have to apply the inverse
 924     // matrix to the context
 925     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
 926     cairo_matrix_invert( &m );
 927     cairo_transform(m_pathContext,&m);
 928 }
 929
 930 // gets the bounding box enclosing all points (possibly including control points)
 931 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
 932 {
 933     double x1,y1,x2,y2;
 934
 935     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
 936     if ( x2 < x1 )
 937     {
 938         *x = x2;
 939         *w = x1-x2;
 940     }
 941     else
 942     {
 943         *x = x1;
 944         *w = x2-x1;
 945     }
 946
 947     if( y2 < y1 )
 948     {
 949         *y = y2;
 950         *h = y1-y2;
 951     }
 952     else
 953     {
 954         *y = y1;
 955         *h = y2-y1;
 956     }
 957 }
 958
 959 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle ) const
 960 {
 961     cairo_set_fill_rule(m_pathContext,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
 962     return cairo_in_fill( m_pathContext, x, y) != 0;
 963 }
 964
 965 //-----------------------------------------------------------------------------
 966 // wxCairoMatrixData implementation
 967 //-----------------------------------------------------------------------------
 968
 969 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
 970     : wxGraphicsMatrixData(renderer)
 971 {
 972     if ( matrix )
 973         m_matrix = *matrix;
 974 }
 975
 976 wxCairoMatrixData::~wxCairoMatrixData()
 977 {
 978     // nothing to do
 979 }
 980
 981 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
 982 {
 983     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
 984 }
 985
 986 // concatenates the matrix
 987 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
 988 {
 989     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
 990 }
 991
 992 // sets the matrix to the respective values
 993 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
 994                         wxDouble tx, wxDouble ty)
 995 {
 996     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
 997 }
 998
 999 // gets the component valuess of the matrix
1000 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
1001                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
1002 {
1003     if (a)  *a = m_matrix.xx;
1004     if (b)  *b = m_matrix.yx;
1005     if (c)  *c = m_matrix.xy;
1006     if (d)  *d = m_matrix.yy;
1007     if (tx) *tx= m_matrix.x0;
1008     if (ty) *ty= m_matrix.y0;
1009 }
1010
1011 // makes this the inverse matrix
1012 void wxCairoMatrixData::Invert()
1013 {
1014     cairo_matrix_invert( &m_matrix );
1015 }
1016
1017 // returns true if the elements of the transformation matrix are equal ?
1018 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
1019 {
1020     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
1021     return (
1022         m_matrix.xx == tm->xx &&
1023         m_matrix.yx == tm->yx &&
1024         m_matrix.xy == tm->xy &&
1025         m_matrix.yy == tm->yy &&
1026         m_matrix.x0 == tm->x0 &&
1027         m_matrix.y0 == tm->y0 ) ;
1028 }
1029
1030 // return true if this is the identity matrix
1031 bool wxCairoMatrixData::IsIdentity() const
1032 {
1033     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
1034         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
1035 }
1036
1037 //
1038 // transformation
1039 //
1040
1041 // add the translation to this matrix
1042 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
1043 {
1044     cairo_matrix_translate( &m_matrix, dx, dy) ;
1045 }
1046
1047 // add the scale to this matrix
1048 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
1049 {
1050     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
1051 }
1052
1053 // add the rotation to this matrix (radians)
1054 void wxCairoMatrixData::Rotate( wxDouble angle )
1055 {
1056     cairo_matrix_rotate( &m_matrix, angle) ;
1057 }
1058
1059 //
1060 // apply the transforms
1061 //
1062
1063 // applies that matrix to the point
1064 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
1065 {
1066     double lx = *x, ly = *y ;
1067     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
1068     *x = lx;
1069     *y = ly;
1070 }
1071
1072 // applies the matrix except for translations
1073 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1074 {
1075     double lx = *dx, ly = *dy ;
1076     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1077     *dx = lx;
1078     *dy = ly;
1079 }
1080
1081 // returns the native representation
1082 void * wxCairoMatrixData::GetNativeMatrix() const
1083 {
1084     return (void*) &m_matrix;
1085 }
1086
1087 // ----------------------------------------------------------------------------
1088 // wxCairoBitmap implementation
1089 // ----------------------------------------------------------------------------
1090
1091 int wxCairoBitmapData::InitBuffer(int width, int height, cairo_format_t format)
1092 {
1093     wxUnusedVar(format); // Only really unused with Cairo < 1.6.
1094
1095     // Determine the stride: use cairo_format_stride_for_width() if available
1096     // but fall back to 4*width for the earlier versions as this is what that
1097     // function always returns, even in latest Cairo, anyhow.
1098     int stride;
1099 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 6, 0)
1100     if ( cairo_version() >= CAIRO_VERSION_ENCODE(1, 6, 0) )
1101     {
1102         stride = cairo_format_stride_for_width(format, width);
1103
1104         // All our code would totally break if stride were not a multiple of 4
1105         // so ensure this is the case.
1106         if ( stride % 4 )
1107         {
1108             wxFAIL_MSG("Unexpected Cairo image surface stride.");
1109
1110             stride += 4 - stride % 4;
1111         }
1112     }
1113     else
1114 #endif
1115         stride = 4*width;
1116
1117     m_width = width;
1118     m_height = height;
1119     m_buffer = new unsigned char[height*stride];
1120
1121     return stride;
1122 }
1123
1124 void wxCairoBitmapData::InitSurface(cairo_format_t format, int stride)
1125 {
1126     m_surface = cairo_image_surface_create_for_data(
1127                             m_buffer, format, m_width, m_height, stride);
1128     m_pattern = cairo_pattern_create_for_surface(m_surface);
1129 }
1130
1131 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap ) :
1132     wxGraphicsObjectRefData( renderer )
1133 {
1134     m_surface = bitmap;
1135     m_pattern = cairo_pattern_create_for_surface(m_surface);
1136 }
1137
1138 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp ) : wxGraphicsObjectRefData( renderer )
1139 {
1140     wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1141
1142 #ifdef wxHAS_RAW_BITMAP
1143     // Create a surface object and copy the bitmap pixel data to it.  if the
1144     // image has alpha (or a mask represented as alpha) then we'll use a
1145     // different format and iterator than if it doesn't...
1146     const cairo_format_t bufferFormat = bmp.GetDepth() == 32
1147 #ifdef __WXGTK__
1148                                             || bmp.GetMask()
1149 #endif
1150                                         ? CAIRO_FORMAT_ARGB32
1151                                         : CAIRO_FORMAT_RGB24;
1152
1153     int stride = InitBuffer(bmp.GetWidth(), bmp.GetHeight(), bufferFormat);
1154
1155     int bw = m_width;
1156     int bh = m_height;
1157     wxBitmap bmpSource = bmp;  // we need a non-const instance
1158     wxUint32* data = (wxUint32*)m_buffer;
1159
1160     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1161     {
1162         // use the bitmap's alpha
1163         wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1164         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1165
1166         wxAlphaPixelData::Iterator p(pixData);
1167         for (int y=0; y<bh; y++)
1168         {
1169             wxAlphaPixelData::Iterator rowStart = p;
1170             wxUint32* const rowStartDst = data;
1171             for (int x=0; x<bw; x++)
1172             {
1173                 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1174                 // with alpha in the upper 8 bits, then red, then green, then
1175                 // blue. The 32-bit quantities are stored native-endian.
1176                 // Pre-multiplied alpha is used.
1177                 unsigned char alpha = p.Alpha();
1178                 if (alpha == 0)
1179                     *data = 0;
1180                 else
1181                     *data = ( alpha                      << 24
1182                               | (p.Red() * alpha/255)    << 16
1183                               | (p.Green() * alpha/255)  <<  8
1184                               | (p.Blue() * alpha/255) );
1185                 ++data;
1186                 ++p;
1187             }
1188
1189             data = rowStartDst + stride / 4;
1190             p = rowStart;
1191             p.OffsetY(pixData, 1);
1192         }
1193     }
1194     else  // no alpha
1195     {
1196         wxNativePixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1197         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1198
1199         wxNativePixelData::Iterator p(pixData);
1200         for (int y=0; y<bh; y++)
1201         {
1202             wxNativePixelData::Iterator rowStart = p;
1203             wxUint32* const rowStartDst = data;
1204             for (int x=0; x<bw; x++)
1205             {
1206                 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1207                 // the upper 8 bits unused. Red, Green, and Blue are stored in
1208                 // the remaining 24 bits in that order.  The 32-bit quantities
1209                 // are stored native-endian.
1210                 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1211                 ++data;
1212                 ++p;
1213             }
1214
1215             data = rowStartDst + stride / 4;
1216             p = rowStart;
1217             p.OffsetY(pixData, 1);
1218         }
1219     }
1220 #ifdef __WXMSW__
1221     // if there is a mask, set the alpha bytes in the target buffer to
1222     // fully transparent or fully opaque
1223     if (bmpSource.GetMask())
1224     {
1225         wxBitmap bmpMask = bmpSource.GetMaskBitmap();
1226         bufferFormat = CAIRO_FORMAT_ARGB32;
1227         data = (wxUint32*)m_buffer;
1228         wxNativePixelData pixData(bmpMask, wxPoint(0,0), wxSize(bw, bh));
1229         wxCHECK_RET( pixData, wxT("Failed to gain raw access to mask bitmap data."));
1230
1231         wxNativePixelData::Iterator p(pixData);
1232         for (int y=0; y<bh; y++)
1233         {
1234             wxNativePixelData::Iterator rowStart = p;
1235             wxUint32* const rowStartDst = data;
1236             for (int x=0; x<bw; x++)
1237             {
1238                 if (p.Red()+p.Green()+p.Blue() == 0)
1239                     *data = 0;
1240                 else
1241                     *data = (wxALPHA_OPAQUE << 24) | (*data & 0x00FFFFFF);
1242                 ++data;
1243                 ++p;
1244             }
1245
1246             data = rowStartDst + stride / 4;
1247             p = rowStart;
1248             p.OffsetY(pixData, 1);
1249         }
1250     }
1251 #endif
1252
1253     InitSurface(bufferFormat, stride);
1254 #endif // wxHAS_RAW_BITMAP
1255 }
1256
1257 #if wxUSE_IMAGE
1258
1259 // Helper functions for dealing with alpha pre-multiplication.
1260 namespace
1261 {
1262
1263 inline unsigned char Premultiply(unsigned char alpha, unsigned char data)
1264 {
1265     return alpha ? (data * alpha)/0xff : data;
1266 }
1267
1268 inline unsigned char Unpremultiply(unsigned char alpha, unsigned char data)
1269 {
1270     return alpha ? (data * 0xff)/alpha : data;
1271 }
1272
1273 } // anonymous namespace
1274
1275 wxCairoBitmapData::wxCairoBitmapData(wxGraphicsRenderer* renderer,
1276                                      const wxImage& image)
1277     : wxGraphicsObjectRefData(renderer)
1278 {
1279     const cairo_format_t bufferFormat = image.HasAlpha()
1280                                             ? CAIRO_FORMAT_ARGB32
1281                                             : CAIRO_FORMAT_RGB24;
1282
1283     InitBuffer(image.GetWidth(), image.GetHeight(), bufferFormat);
1284
1285     // Copy wxImage data into the buffer. Notice that we work with wxUint32
1286     // values and not bytes becase Cairo always works with buffers in native
1287     // endianness.
1288     wxUint32* dst = reinterpret_cast<wxUint32*>(m_buffer);
1289     const unsigned char* src = image.GetData();
1290
1291     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1292     {
1293         const unsigned char* alpha = image.GetAlpha();
1294
1295         for ( int y = 0; y < m_height; y++ )
1296         {
1297             for ( int x = 0; x < m_width; x++ )
1298             {
1299                 const unsigned char a = *alpha++;
1300
1301                 *dst++ = a                      << 24 |
1302                          Premultiply(a, src[0]) << 16 |
1303                          Premultiply(a, src[1]) <<  8 |
1304                          Premultiply(a, src[2]);
1305                 src += 3;
1306             }
1307         }
1308     }
1309     else // RGB
1310     {
1311         for ( int y = 0; y < m_height; y++ )
1312         {
1313             for ( int x = 0; x < m_width; x++ )
1314             {
1315                 *dst++ = src[0] << 16 |
1316                          src[1] <<  8 |
1317                          src[2];
1318                 src += 3;
1319             }
1320         }
1321     }
1322
1323     InitSurface(bufferFormat);
1324 }
1325
1326 wxImage wxCairoBitmapData::ConvertToImage() const
1327 {
1328     wxImage image(m_width, m_height, false /* don't clear */);
1329
1330     // Get the surface type and format.
1331     wxCHECK_MSG( cairo_surface_get_type(m_surface) == CAIRO_SURFACE_TYPE_IMAGE,
1332                  wxNullImage,
1333                  wxS("Can't convert non-image surface to image.") );
1334
1335     switch ( cairo_image_surface_get_format(m_surface) )
1336     {
1337         case CAIRO_FORMAT_ARGB32:
1338             image.SetAlpha();
1339             break;
1340
1341         case CAIRO_FORMAT_RGB24:
1342             // Nothing to do, we don't use alpha by default.
1343             break;
1344
1345         case CAIRO_FORMAT_A8:
1346         case CAIRO_FORMAT_A1:
1347             wxFAIL_MSG(wxS("Unsupported Cairo image surface type."));
1348             return wxNullImage;
1349
1350         default:
1351             wxFAIL_MSG(wxS("Unknown Cairo image surface type."));
1352             return wxNullImage;
1353     }
1354
1355     // Prepare for copying data.
1356     const wxUint32* src = (wxUint32*)cairo_image_surface_get_data(m_surface);
1357     wxCHECK_MSG( src, wxNullImage, wxS("Failed to get Cairo surface data.") );
1358
1359     int stride = cairo_image_surface_get_stride(m_surface);
1360     wxCHECK_MSG( stride > 0, wxNullImage,
1361                  wxS("Failed to get Cairo surface stride.") );
1362
1363     // As we work with wxUint32 pointers and not char ones, we need to adjust
1364     // the stride accordingly. This should be lossless as the stride must be a
1365     // multiple of pixel size.
1366     wxASSERT_MSG( !(stride % sizeof(wxUint32)), wxS("Unexpected stride.") );
1367     stride /= sizeof(wxUint32);
1368
1369     unsigned char* dst = image.GetData();
1370     unsigned char *alpha = image.GetAlpha();
1371     if ( alpha )
1372     {
1373         // We need to also copy alpha and undo the pre-multiplication as Cairo
1374         // stores pre-multiplied values in this format while wxImage does not.
1375         for ( int y = 0; y < m_height; y++ )
1376         {
1377             const wxUint32* const rowStart = src;
1378             for ( int x = 0; x < m_width; x++ )
1379             {
1380                 const wxUint32 argb = *src++;
1381
1382                 *alpha++ = (argb & 0xff000000) >> 24;
1383
1384                 // Copy the RGB data undoing the pre-multiplication.
1385                 *dst++ = Unpremultiply(*alpha, (argb & 0x00ff0000) >> 16);
1386                 *dst++ = Unpremultiply(*alpha, (argb & 0x0000ff00) >>  8);
1387                 *dst++ = Unpremultiply(*alpha, (argb & 0x000000ff));
1388             }
1389
1390             src = rowStart + stride;
1391         }
1392     }
1393     else // RGB
1394     {
1395         // Things are pretty simple in this case, just copy RGB bytes.
1396         for ( int y = 0; y < m_height; y++ )
1397         {
1398             const wxUint32* const rowStart = src;
1399             for ( int x = 0; x < m_width; x++ )
1400             {
1401                 const wxUint32 argb = *src++;
1402
1403                 *dst++ = (argb & 0x00ff0000) >> 16;
1404                 *dst++ = (argb & 0x0000ff00) >>  8;
1405                 *dst++ = (argb & 0x000000ff);
1406             }
1407
1408             src = rowStart + stride;
1409         }
1410     }
1411
1412     return image;
1413 }
1414
1415 #endif // wxUSE_IMAGE
1416
1417 wxCairoBitmapData::~wxCairoBitmapData()
1418 {
1419     if (m_pattern)
1420         cairo_pattern_destroy(m_pattern);
1421
1422     if (m_surface)
1423         cairo_surface_destroy(m_surface);
1424
1425     delete [] m_buffer;
1426 }
1427
1428 // ----------------------------------------------------------------------------
1429 // wxGraphicsBitmap implementation
1430 // ----------------------------------------------------------------------------
1431
1432 #if wxUSE_IMAGE
1433
1434 wxImage wxGraphicsBitmap::ConvertToImage() const
1435 {
1436     const wxCairoBitmapData* const
1437         data = static_cast<wxCairoBitmapData*>(GetGraphicsData());
1438
1439     return data ? data->ConvertToImage() : wxNullImage;
1440 }
1441
1442 #endif // wxUSE_IMAGE
1443
1444 //-----------------------------------------------------------------------------
1445 // wxCairoContext implementation
1446 //-----------------------------------------------------------------------------
1447
1448 class wxCairoOffsetHelper
1449 {
1450 public :
1451     wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1452     {
1453         m_ctx = ctx;
1454         m_offset = offset;
1455         if ( m_offset )
1456              cairo_translate( m_ctx, 0.5, 0.5 );
1457     }
1458     ~wxCairoOffsetHelper( )
1459     {
1460         if ( m_offset )
1461             cairo_translate( m_ctx, -0.5, -0.5 );
1462     }
1463 public :
1464     cairo_t* m_ctx;
1465     bool m_offset;
1466 } ;
1467
1468 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1469 : wxGraphicsContext(renderer)
1470 {
1471 #ifdef __WXMSW__
1472     // wxMSW contexts always use MM_ANISOTROPIC, which messes up
1473     // text rendering when printing using Cairo. Switch it to MM_TEXT
1474     // map mode to avoid this problem.
1475     HDC hdc = (HDC)dc.GetHDC();
1476     ::SetMapMode(hdc, MM_TEXT);
1477     m_mswSurface = cairo_win32_printing_surface_create(hdc);
1478     Init( cairo_create(m_mswSurface) );
1479 #endif
1480
1481 #ifdef __WXGTK20__
1482     const wxDCImpl *impl = dc.GetImpl();
1483     Init( (cairo_t*) impl->GetCairoContext() );
1484 #endif
1485     wxSize sz = dc.GetSize();
1486     m_width = sz.x;
1487     m_height = sz.y;
1488
1489     wxPoint org = dc.GetDeviceOrigin();
1490     cairo_translate( m_context, org.x, org.y );
1491
1492     double sx,sy;
1493     dc.GetUserScale( &sx, &sy );
1494
1495 // TODO: Determine if these fixes are needed on other platforms too.
1496 // On MSW, without this the printer context will not respect wxDC SetMapMode calls.
1497 // For example, using dc.SetMapMode(wxMM_POINTS) can let us share printer and screen
1498 // drawing code
1499 #ifdef __WXMSW__
1500     double lsx,lsy;
1501     dc.GetLogicalScale( &lsx, &lsy );
1502     sx *= lsx;
1503     sy *= lsy;
1504 #endif
1505     cairo_scale( m_context, sx, sy );
1506
1507     org = dc.GetLogicalOrigin();
1508     cairo_translate( m_context, -org.x, -org.y );
1509 }
1510
1511 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1512 : wxGraphicsContext(renderer)
1513 {
1514     int width, height;
1515     dc.GetSize( &width, &height );
1516     m_width = width;
1517     m_height = height;
1518
1519     m_enableOffset = true;
1520
1521 #ifdef __WXMSW__
1522     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1523     Init( cairo_create(m_mswSurface) );
1524 #endif
1525
1526 #ifdef __WXGTK20__
1527     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1528     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1529
1530 #if 0
1531     wxGraphicsMatrix matrix = CreateMatrix();
1532
1533     wxPoint org = dc.GetDeviceOrigin();
1534     matrix.Translate( org.x, org.y );
1535
1536     org = dc.GetLogicalOrigin();
1537     matrix.Translate( -org.x, -org.y );
1538
1539     double sx,sy;
1540     dc.GetUserScale( &sx, &sy );
1541     matrix.Scale( sx, sy );
1542
1543     ConcatTransform( matrix );
1544 #endif
1545 #endif
1546
1547 #ifdef __WXMAC__
1548     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1549     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1550     Init( cairo_create( surface ) );
1551     cairo_surface_destroy( surface );
1552 #endif
1553 }
1554
1555 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1556 : wxGraphicsContext(renderer)
1557 {
1558     int width, height;
1559     dc.GetSize( &width, &height );
1560     m_width = width;
1561     m_height = height;
1562
1563     m_enableOffset = true;
1564
1565 #ifdef __WXMSW__
1566     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1567     Init( cairo_create(m_mswSurface) );
1568 #endif
1569
1570 #ifdef __WXGTK20__
1571     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1572     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1573
1574 #if 0
1575     wxGraphicsMatrix matrix = CreateMatrix();
1576
1577     wxPoint org = dc.GetDeviceOrigin();
1578     matrix.Translate( org.x, org.y );
1579
1580     org = dc.GetLogicalOrigin();
1581     matrix.Translate( -org.x, -org.y );
1582
1583     double sx,sy;
1584     dc.GetUserScale( &sx, &sy );
1585     matrix.Scale( sx, sy );
1586
1587     ConcatTransform( matrix );
1588 #endif
1589 #endif
1590
1591 #ifdef __WXMAC__
1592     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1593     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1594     Init( cairo_create( surface ) );
1595     cairo_surface_destroy( surface );
1596 #endif
1597 }
1598
1599 #ifdef __WXGTK20__
1600 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
1601 : wxGraphicsContext(renderer)
1602 {
1603     Init( gdk_cairo_create( drawable ) );
1604
1605     int width, height;
1606     gdk_drawable_get_size( drawable, &width, &height );
1607     m_width = width;
1608     m_height = height;
1609 }
1610 #endif
1611
1612 #ifdef __WXMSW__
1613 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, HDC handle )
1614 : wxGraphicsContext(renderer)
1615 {
1616     m_mswSurface = cairo_win32_surface_create(handle);
1617     Init( cairo_create(m_mswSurface) );
1618     m_width =
1619     m_height = 0;
1620 }
1621 #endif
1622
1623
1624 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1625 : wxGraphicsContext(renderer)
1626 {
1627     Init( context );
1628     m_width =
1629     m_height = 0;
1630 }
1631
1632 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1633 : wxGraphicsContext(renderer)
1634 {
1635     m_enableOffset = true;
1636 #ifdef __WXGTK__
1637     // something along these lines (copied from dcclient)
1638
1639     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1640     // code should still be able to create wxClientDCs for them, so we will
1641     // use the parent window here then.
1642     if (window->m_wxwindow == NULL)
1643     {
1644         window = window->GetParent();
1645     }
1646
1647     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1648
1649     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1650
1651     wxSize sz = window->GetSize();
1652     m_width = sz.x;
1653     m_height = sz.y;
1654 #endif
1655
1656 #ifdef __WXMSW__
1657     m_mswSurface = cairo_win32_surface_create((HDC)window->GetHandle());
1658     Init(cairo_create(m_mswSurface));
1659 #endif
1660
1661 }
1662
1663 wxCairoContext::~wxCairoContext()
1664 {
1665     if ( m_context )
1666     {
1667         PopState();
1668         PopState();
1669         cairo_destroy(m_context);
1670     }
1671 #ifdef __WXMSW__
1672     if ( m_mswSurface )
1673         cairo_surface_destroy(m_mswSurface);
1674 #endif
1675 }
1676
1677 void wxCairoContext::Init(cairo_t *context)
1678 {
1679     m_context = context ;
1680     PushState();
1681     PushState();
1682 }
1683
1684
1685 void wxCairoContext::Clip( const wxRegion& region )
1686 {
1687     // Create a path with all the rectangles in the region
1688     wxGraphicsPath path = GetRenderer()->CreatePath();
1689     wxRegionIterator ri(region);
1690     while (ri)
1691     {
1692         path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1693         ++ri;
1694     }
1695
1696     // Put it in the context
1697     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1698     cairo_append_path(m_context, cp);
1699
1700     // clip to that path
1701     cairo_clip(m_context);
1702     path.UnGetNativePath(cp);
1703 }
1704
1705 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1706 {
1707     // Create a path with this rectangle
1708     wxGraphicsPath path = GetRenderer()->CreatePath();
1709     path.AddRectangle(x,y,w,h);
1710
1711     // Put it in the context
1712     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1713     cairo_append_path(m_context, cp);
1714
1715     // clip to that path
1716     cairo_clip(m_context);
1717     path.UnGetNativePath(cp);
1718 }
1719
1720 void wxCairoContext::ResetClip()
1721 {
1722     cairo_reset_clip(m_context);
1723 }
1724
1725
1726 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1727 {
1728     if ( !m_pen.IsNull() )
1729     {
1730         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1731         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1732         cairo_append_path(m_context,cp);
1733         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1734         cairo_stroke(m_context);
1735         path.UnGetNativePath(cp);
1736     }
1737 }
1738
1739 void wxCairoContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1740 {
1741     if ( !m_brush.IsNull() )
1742     {
1743         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1744         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1745         cairo_append_path(m_context,cp);
1746         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1747         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1748         cairo_fill(m_context);
1749         path.UnGetNativePath(cp);
1750     }
1751 }
1752
1753 void wxCairoContext::Rotate( wxDouble angle )
1754 {
1755     cairo_rotate(m_context,angle);
1756 }
1757
1758 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1759 {
1760     cairo_translate(m_context,dx,dy);
1761 }
1762
1763 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1764 {
1765     cairo_scale(m_context,xScale,yScale);
1766 }
1767
1768 // concatenates this transform with the current transform of this context
1769 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1770 {
1771     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1772 }
1773
1774 // sets the transform of this context
1775 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1776 {
1777     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1778 }
1779
1780 // gets the matrix of this context
1781 wxGraphicsMatrix wxCairoContext::GetTransform() const
1782 {
1783     wxGraphicsMatrix matrix = CreateMatrix();
1784     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1785     return matrix;
1786 }
1787
1788
1789
1790 void wxCairoContext::PushState()
1791 {
1792     cairo_save(m_context);
1793 }
1794
1795 void wxCairoContext::PopState()
1796 {
1797     cairo_restore(m_context);
1798 }
1799
1800 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1801 {
1802     wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp);
1803     DrawBitmap(bitmap, x, y, w, h);
1804
1805 }
1806
1807 void wxCairoContext::DrawBitmap(const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1808 {
1809     PushState();
1810
1811     // In case we're scaling the image by using a width and height different
1812     // than the bitmap's size create a pattern transformation on the surface and
1813     // draw the transformed pattern.
1814     wxCairoBitmapData* data = static_cast<wxCairoBitmapData*>(bmp.GetRefData());
1815     cairo_pattern_t* pattern = data->GetCairoPattern();
1816     wxSize size = data->GetSize();
1817
1818     wxDouble scaleX = w / size.GetWidth();
1819     wxDouble scaleY = h / size.GetHeight();
1820
1821     // prepare to draw the image
1822     cairo_translate(m_context, x, y);
1823     cairo_scale(m_context, scaleX, scaleY);
1824     cairo_set_source(m_context, pattern);
1825     // use the original size here since the context is scaled already...
1826     cairo_rectangle(m_context, 0, 0, size.GetWidth(), size.GetHeight());
1827     // fill the rectangle using the pattern
1828     cairo_fill(m_context);
1829
1830     PopState();
1831 }
1832
1833 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1834 {
1835     // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
1836     // start using the Cairo backend on other platforms then we may need to
1837     // fiddle with this...
1838     DrawBitmap(icon, x, y, w, h);
1839 }
1840
1841
1842 void wxCairoContext::DoDrawText(const wxString& str, wxDouble x, wxDouble y)
1843 {
1844     wxCHECK_RET( !m_font.IsNull(),
1845                  wxT("wxCairoContext::DrawText - no valid font set") );
1846
1847     if ( str.empty())
1848         return;
1849
1850     const wxCharBuffer data = str.utf8_str();
1851     if ( !data )
1852         return;
1853
1854     ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
1855
1856 #ifdef __WXGTK__
1857     size_t datalen = strlen(data);
1858
1859     PangoLayout *layout = pango_cairo_create_layout (m_context);
1860     wxCairoFontData* font_data = (wxCairoFontData*) m_font.GetRefData();
1861     pango_layout_set_font_description( layout, font_data->GetFont());
1862     pango_layout_set_text(layout, data, datalen);
1863
1864     if (font_data->GetUnderlined())
1865     {
1866         PangoAttrList *attrs = pango_attr_list_new();
1867         PangoAttribute *attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
1868         pango_attr_list_insert(attrs, attr);
1869         pango_layout_set_attributes(layout, attrs);
1870         pango_attr_list_unref(attrs);
1871     }
1872
1873     cairo_move_to(m_context, x, y);
1874     pango_cairo_show_layout (m_context, layout);
1875
1876     g_object_unref (layout);
1877 #else
1878     // Cairo's x,y for drawing text is at the baseline, so we need to adjust
1879     // the position we move to by the ascent.
1880     cairo_font_extents_t fe;
1881     cairo_font_extents(m_context, &fe);
1882     cairo_move_to(m_context, x, y+fe.ascent);
1883
1884     cairo_show_text(m_context, data);
1885 #endif
1886 }
1887
1888 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1889                                     wxDouble *descent, wxDouble *externalLeading ) const
1890 {
1891     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
1892
1893     if ( width )
1894         *width = 0;
1895     if ( height )
1896         *height = 0;
1897     if ( descent )
1898         *descent = 0;
1899     if ( externalLeading )
1900         *externalLeading = 0;
1901
1902     if ( str.empty())
1903         return;
1904
1905 #ifdef __WXGTK__
1906     int w, h;
1907
1908     PangoLayout *layout = pango_cairo_create_layout (m_context);
1909     pango_layout_set_font_description( layout, ((wxCairoFontData*)m_font.GetRefData())->GetFont());
1910     const wxCharBuffer data = str.utf8_str();
1911     if ( !data )
1912     {
1913         return;
1914     }
1915     pango_layout_set_text( layout, data, strlen(data) );
1916     pango_layout_get_pixel_size (layout, &w, &h);
1917     if ( width )
1918         *width = w;
1919     if ( height )
1920         *height = h;
1921     if (descent)
1922     {
1923         PangoLayoutIter *iter = pango_layout_get_iter(layout);
1924         int baseline = pango_layout_iter_get_baseline(iter);
1925         pango_layout_iter_free(iter);
1926         *descent = h - PANGO_PIXELS(baseline);
1927     }
1928     g_object_unref (layout);
1929 #else
1930     ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this);
1931
1932     if (width)
1933     {
1934         const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
1935         cairo_text_extents_t te;
1936         cairo_text_extents(m_context, buf, &te);
1937         *width = te.width;
1938     }
1939
1940     if (height || descent || externalLeading)
1941     {
1942         cairo_font_extents_t fe;
1943         cairo_font_extents(m_context, &fe);
1944
1945         // some backends have negative descents
1946
1947         if ( fe.descent < 0 )
1948             fe.descent = -fe.descent;
1949
1950         if ( fe.height < (fe.ascent + fe.descent ) )
1951         {
1952             // some backends are broken re height ... (eg currently ATSUI)
1953             fe.height = fe.ascent + fe.descent;
1954         }
1955
1956         if (height)
1957             *height = fe.height;
1958         if ( descent )
1959             *descent = fe.descent;
1960         if ( externalLeading )
1961             *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
1962     }
1963 #endif
1964 }
1965
1966 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
1967 {
1968     widths.Empty();
1969     widths.Add(0, text.length());
1970
1971     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
1972
1973     if (text.empty())
1974         return;
1975
1976     // TODO
1977 }
1978
1979 void * wxCairoContext::GetNativeContext()
1980 {
1981     return m_context;
1982 }
1983
1984 bool wxCairoContext::SetAntialiasMode(wxAntialiasMode antialias)
1985 {
1986     if (m_antialias == antialias)
1987         return true;
1988
1989     m_antialias = antialias;
1990
1991     cairo_antialias_t antialiasMode;
1992     switch (antialias)
1993     {
1994         case wxANTIALIAS_DEFAULT:
1995             antialiasMode = CAIRO_ANTIALIAS_DEFAULT;
1996             break;
1997         case wxANTIALIAS_NONE:
1998             antialiasMode = CAIRO_ANTIALIAS_NONE;
1999             break;
2000         default:
2001             return false;
2002     }
2003     cairo_set_antialias(m_context, antialiasMode);
2004     return true;
2005 }
2006
2007 bool wxCairoContext::SetInterpolationQuality(wxInterpolationQuality WXUNUSED(interpolation))
2008 {
2009     // placeholder
2010     return false;
2011 }
2012
2013 bool wxCairoContext::SetCompositionMode(wxCompositionMode op)
2014 {
2015     if ( m_composition == op )
2016         return true;
2017
2018     m_composition = op;
2019     cairo_operator_t cop;
2020     switch (op)
2021     {
2022         case wxCOMPOSITION_CLEAR:
2023             cop = CAIRO_OPERATOR_CLEAR;
2024             break;
2025         case wxCOMPOSITION_SOURCE:
2026             cop = CAIRO_OPERATOR_SOURCE;
2027             break;
2028         case wxCOMPOSITION_OVER:
2029             cop = CAIRO_OPERATOR_OVER;
2030             break;
2031         case wxCOMPOSITION_IN:
2032             cop = CAIRO_OPERATOR_IN;
2033             break;
2034         case wxCOMPOSITION_OUT:
2035             cop = CAIRO_OPERATOR_OUT;
2036             break;
2037         case wxCOMPOSITION_ATOP:
2038             cop = CAIRO_OPERATOR_ATOP;
2039             break;
2040         case wxCOMPOSITION_DEST:
2041             cop = CAIRO_OPERATOR_DEST;
2042             break;
2043         case wxCOMPOSITION_DEST_OVER:
2044             cop = CAIRO_OPERATOR_DEST_OVER;
2045             break;
2046         case wxCOMPOSITION_DEST_IN:
2047             cop = CAIRO_OPERATOR_DEST_IN;
2048             break;
2049         case wxCOMPOSITION_DEST_OUT:
2050             cop = CAIRO_OPERATOR_DEST_OUT;
2051             break;
2052         case wxCOMPOSITION_DEST_ATOP:
2053             cop = CAIRO_OPERATOR_DEST_ATOP;
2054             break;
2055         case wxCOMPOSITION_XOR:
2056             cop = CAIRO_OPERATOR_XOR;
2057             break;
2058         case wxCOMPOSITION_ADD:
2059             cop = CAIRO_OPERATOR_ADD;
2060             break;
2061         default:
2062             return false;
2063     }
2064     cairo_set_operator(m_context, cop);
2065     return true;
2066 }
2067
2068 void wxCairoContext::BeginLayer(wxDouble opacity)
2069 {
2070     m_layerOpacities.push_back(opacity);
2071     cairo_push_group(m_context);
2072 }
2073
2074 void wxCairoContext::EndLayer()
2075 {
2076     float opacity = m_layerOpacities.back();
2077     m_layerOpacities.pop_back();
2078     cairo_pop_group_to_source(m_context);
2079     cairo_paint_with_alpha(m_context,opacity);
2080 }
2081
2082 //-----------------------------------------------------------------------------
2083 // wxCairoRenderer declaration
2084 //-----------------------------------------------------------------------------
2085
2086 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
2087 {
2088 public :
2089     wxCairoRenderer() {}
2090
2091     virtual ~wxCairoRenderer() {}
2092
2093     // Context
2094
2095     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
2096     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
2097     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
2098
2099     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
2100
2101     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
2102
2103     virtual wxGraphicsContext * CreateContext( wxWindow* window );
2104
2105     virtual wxGraphicsContext * CreateMeasuringContext();
2106 #ifdef __WXMSW__
2107 #if wxUSE_ENH_METAFILE
2108     virtual wxGraphicsContext * CreateContext( const wxEnhMetaFileDC& dc);
2109 #endif
2110 #endif
2111     // Path
2112
2113     virtual wxGraphicsPath CreatePath();
2114
2115     // Matrix
2116
2117     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
2118         wxDouble tx=0.0, wxDouble ty=0.0);
2119
2120
2121     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
2122
2123     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
2124
2125     virtual wxGraphicsBrush
2126     CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2127                               wxDouble x2, wxDouble y2,
2128                               const wxGraphicsGradientStops& stops);
2129
2130     virtual wxGraphicsBrush
2131     CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2132                               wxDouble xc, wxDouble yc,
2133                               wxDouble radius,
2134                               const wxGraphicsGradientStops& stops);
2135
2136     // sets the font
2137     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
2138
2139     // create a native bitmap representation
2140     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap );
2141
2142     // create a graphics bitmap from a native bitmap
2143     virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
2144
2145     // create a subimage from a native image representation
2146     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  );
2147
2148 protected :
2149     bool EnsureIsLoaded();
2150     void Load();
2151     void Unload();
2152     friend class wxCairoModule;
2153 private :
2154     int m_loaded;
2155     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
2156 } ;
2157
2158 //-----------------------------------------------------------------------------
2159 // wxCairoRenderer implementation
2160 //-----------------------------------------------------------------------------
2161
2162 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
2163
2164 static wxCairoRenderer gs_cairoGraphicsRenderer;
2165 // temporary hack to allow creating a cairo context on any platform
2166 extern wxGraphicsRenderer* gCairoRenderer;
2167 wxGraphicsRenderer* gCairoRenderer = &gs_cairoGraphicsRenderer;
2168
2169 bool wxCairoRenderer::EnsureIsLoaded()
2170 {
2171 #ifndef __WXGTK__
2172     Load();
2173     return wxCairoInit();
2174 #else
2175     return true;
2176 #endif
2177 }
2178
2179 void wxCairoRenderer::Load()
2180 {
2181     wxCairoInit();
2182 }
2183
2184 void wxCairoRenderer::Unload()
2185 {
2186     wxCairoCleanUp();
2187 }
2188
2189 // call EnsureIsLoaded() and return returnOnFail value if it fails
2190 #define ENSURE_LOADED_OR_RETURN(returnOnFail)  \
2191     if ( !EnsureIsLoaded() )                   \
2192         return (returnOnFail)
2193
2194 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
2195 {
2196     ENSURE_LOADED_OR_RETURN(NULL);
2197     return new wxCairoContext(this,dc);
2198 }
2199
2200 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
2201 {
2202     ENSURE_LOADED_OR_RETURN(NULL);
2203     return new wxCairoContext(this,dc);
2204 }
2205
2206 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
2207 {
2208     ENSURE_LOADED_OR_RETURN(NULL);
2209 #ifdef __WXGTK20__
2210     const wxDCImpl *impl = dc.GetImpl();
2211     cairo_t* context = (cairo_t*) impl->GetCairoContext();
2212     if (context)
2213        return new wxCairoContext(this,dc);
2214     else
2215 #endif
2216        return new wxCairoContext(this,dc);
2217 }
2218
2219 #ifdef __WXMSW__
2220 #if wxUSE_ENH_METAFILE
2221 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxEnhMetaFileDC& WXUNUSED(dc) )
2222 {
2223     ENSURE_LOADED_OR_RETURN(NULL);
2224     return NULL;
2225 }
2226 #endif
2227 #endif
2228
2229 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
2230 {
2231     ENSURE_LOADED_OR_RETURN(NULL);
2232 #ifdef __WXMSW__
2233     return new wxCairoContext(this,(HDC)context);
2234 #else
2235     return new wxCairoContext(this,(cairo_t*)context);
2236 #endif
2237 }
2238
2239
2240 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
2241 {
2242     ENSURE_LOADED_OR_RETURN(NULL);
2243 #ifdef __WXGTK__
2244     return new wxCairoContext(this,(GdkDrawable*)window);
2245 #else
2246     wxUnusedVar(window);
2247     return NULL;
2248 #endif
2249 }
2250
2251 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
2252 {
2253     ENSURE_LOADED_OR_RETURN(NULL);
2254 #ifdef __WXGTK__
2255     return CreateContextFromNativeWindow(gdk_get_default_root_window());
2256 #endif
2257     return NULL;
2258     // TODO
2259 }
2260
2261 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
2262 {
2263     ENSURE_LOADED_OR_RETURN(NULL);
2264     return new wxCairoContext(this, window );
2265 }
2266
2267 // Path
2268
2269 wxGraphicsPath wxCairoRenderer::CreatePath()
2270 {
2271     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPath);
2272     wxGraphicsPath path;
2273     path.SetRefData( new wxCairoPathData(this) );
2274     return path;
2275 }
2276
2277
2278 // Matrix
2279
2280 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
2281                                                 wxDouble tx, wxDouble ty)
2282
2283 {
2284     ENSURE_LOADED_OR_RETURN(wxNullGraphicsMatrix);
2285     wxGraphicsMatrix m;
2286     wxCairoMatrixData* data = new wxCairoMatrixData( this );
2287     data->Set( a,b,c,d,tx,ty ) ;
2288     m.SetRefData(data);
2289     return m;
2290 }
2291
2292 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
2293 {
2294     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPen);
2295     if ( !pen.IsOk() || pen.GetStyle() == wxPENSTYLE_TRANSPARENT )
2296         return wxNullGraphicsPen;
2297     else
2298     {
2299         wxGraphicsPen p;
2300         p.SetRefData(new wxCairoPenData( this, pen ));
2301         return p;
2302     }
2303 }
2304
2305 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
2306 {
2307     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2308     if ( !brush.IsOk() || brush.GetStyle() == wxBRUSHSTYLE_TRANSPARENT )
2309         return wxNullGraphicsBrush;
2310     else
2311     {
2312         wxGraphicsBrush p;
2313         p.SetRefData(new wxCairoBrushData( this, brush ));
2314         return p;
2315     }
2316 }
2317
2318 wxGraphicsBrush
2319 wxCairoRenderer::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2320                                            wxDouble x2, wxDouble y2,
2321                                            const wxGraphicsGradientStops& stops)
2322 {
2323     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2324     wxGraphicsBrush p;
2325     wxCairoBrushData* d = new wxCairoBrushData( this );
2326     d->CreateLinearGradientBrush(x1, y1, x2, y2, stops);
2327     p.SetRefData(d);
2328     return p;
2329 }
2330
2331 wxGraphicsBrush
2332 wxCairoRenderer::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2333                                            wxDouble xc, wxDouble yc, wxDouble r,
2334                                            const wxGraphicsGradientStops& stops)
2335 {
2336     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2337     wxGraphicsBrush p;
2338     wxCairoBrushData* d = new wxCairoBrushData( this );
2339     d->CreateRadialGradientBrush(xo, yo, xc, yc, r, stops);
2340     p.SetRefData(d);
2341     return p;
2342 }
2343
2344 // sets the font
2345 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
2346 {
2347     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
2348     if ( font.IsOk() )
2349     {
2350         wxGraphicsFont p;
2351         p.SetRefData(new wxCairoFontData( this , font, col ));
2352         return p;
2353     }
2354     else
2355         return wxNullGraphicsFont;
2356 }
2357
2358 wxGraphicsBitmap wxCairoRenderer::CreateBitmap( const wxBitmap& bmp )
2359 {
2360     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2361     if ( bmp.IsOk() )
2362     {
2363         wxGraphicsBitmap p;
2364         p.SetRefData(new wxCairoBitmapData( this , bmp ));
2365         return p;
2366     }
2367     else
2368         return wxNullGraphicsBitmap;
2369 }
2370
2371 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromNativeBitmap( void* bitmap )
2372 {
2373     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2374     if ( bitmap != NULL )
2375     {
2376         wxGraphicsBitmap p;
2377         p.SetRefData(new wxCairoBitmapData( this , (cairo_surface_t*) bitmap ));
2378         return p;
2379     }
2380     else
2381         return wxNullGraphicsBitmap;
2382 }
2383
2384 wxGraphicsBitmap
2385 wxCairoRenderer::CreateSubBitmap(const wxGraphicsBitmap& WXUNUSED(bitmap),
2386                                  wxDouble WXUNUSED(x),
2387                                  wxDouble WXUNUSED(y),
2388                                  wxDouble WXUNUSED(w),
2389                                  wxDouble WXUNUSED(h))
2390 {
2391     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2392     wxFAIL_MSG("wxCairoRenderer::CreateSubBitmap is not implemented.");
2393     return wxNullGraphicsBitmap;
2394 }
2395
2396 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2397 {
2398     return &gs_cairoGraphicsRenderer;
2399 }
2400
2401 #else // !wxUSE_CAIRO
2402
2403 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2404 {
2405     return NULL;
2406 }
2407
2408 #endif  // wxUSE_CAIRO/!wxUSE_CAIRO
2409
2410 // MSW and OS X have their own native default renderers, but the other ports
2411 // use Cairo by default
2412 #if !(defined(__WXMSW__) || defined(__WXOSX__))
2413 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
2414 {
2415     return GetCairoRenderer();
2416 }
2417 #endif // !(__WXMSW__ || __WXOSX__)
2418
2419 #endif // wxUSE_GRAPHICS_CONTEXT