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(wxGraphicsRenderer* renderer,
 286                     double sizeInPixels,
 287                     const wxString& facename,
 288                     int flags,
 289                     const wxColour& col);
 290     ~wxCairoFontData();
 291
 292     virtual bool Apply( wxGraphicsContext* context );
 293 #ifdef __WXGTK__
 294     const wxFont& GetFont() const { return m_wxfont; }
 295 #endif
 296 private :
 297     void InitColour(const wxColour& col);
 298     void InitFontComponents(const wxString& facename,
 299                             cairo_font_slant_t slant,
 300                             cairo_font_weight_t weight);
 301
 302     double m_size;
 303     double m_red;
 304     double m_green;
 305     double m_blue;
 306     double m_alpha;
 307 #ifdef __WXMAC__
 308     cairo_font_face_t *m_font;
 309 #elif defined(__WXGTK__)
 310     wxFont m_wxfont;
 311 #endif
 312
 313     // These members are used when the font is created from its face name and
 314     // flags (and not from wxFont) and also even when creating it from wxFont
 315     // on the platforms not covered above.
 316     //
 317     // Notice that we can't use cairo_font_face_t instead of storing those,
 318     // even though it would be simpler and need less #ifdefs, because
 319     // cairo_toy_font_face_create() that we'd need to create it is only
 320     // available in Cairo 1.8 and we require just 1.2 currently. If we do drop
 321     // support for < 1.8 versions in the future it would be definitely better
 322     // to use cairo_toy_font_face_create() instead.
 323     wxCharBuffer m_fontName;
 324     cairo_font_slant_t m_slant;
 325     cairo_font_weight_t m_weight;
 326 };
 327
 328 class wxCairoBitmapData : public wxGraphicsObjectRefData
 329 {
 330 public:
 331     wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp );
 332 #if wxUSE_IMAGE
 333     wxCairoBitmapData(wxGraphicsRenderer* renderer, const wxImage& image);
 334 #endif // wxUSE_IMAGE
 335     wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap );
 336     ~wxCairoBitmapData();
 337
 338     virtual cairo_surface_t* GetCairoSurface() { return m_surface; }
 339     virtual cairo_pattern_t* GetCairoPattern() { return m_pattern; }
 340     virtual wxSize GetSize() { return wxSize(m_width, m_height); }
 341
 342 #if wxUSE_IMAGE
 343     wxImage ConvertToImage() const;
 344 #endif // wxUSE_IMAGE
 345
 346 private :
 347     // Allocate m_buffer for the bitmap of the given size in the given format.
 348     //
 349     // Returns the stride used for the buffer.
 350     int InitBuffer(int width, int height, cairo_format_t format);
 351
 352     // Really create the surface using the buffer (which was supposed to be
 353     // filled since InitBuffer() call).
 354     void InitSurface(cairo_format_t format, int stride);
 355
 356
 357     cairo_surface_t* m_surface;
 358     cairo_pattern_t* m_pattern;
 359     int m_width;
 360     int m_height;
 361     unsigned char* m_buffer;
 362 };
 363
 364 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
 365 {
 366 public:
 367     wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc );
 368     wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc );
 369     wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc );
 370 #ifdef __WXGTK__
 371     wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable );
 372 #endif
 373 #ifdef __WXMSW__
 374     wxCairoContext( wxGraphicsRenderer* renderer, HDC context );
 375 #endif
 376     wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context );
 377     wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window);
 378
 379     // If this ctor is used, Init() must be called by the derived class later.
 380     wxCairoContext( wxGraphicsRenderer* renderer );
 381
 382     virtual ~wxCairoContext();
 383
 384     virtual bool ShouldOffset() const
 385     {
 386         if ( !m_enableOffset )
 387             return false;
 388
 389         int penwidth = 0 ;
 390         if ( !m_pen.IsNull() )
 391         {
 392             penwidth = (int)((wxCairoPenData*)m_pen.GetRefData())->GetWidth();
 393             if ( penwidth == 0 )
 394                 penwidth = 1;
 395         }
 396         return ( penwidth % 2 ) == 1;
 397     }
 398
 399     virtual void Clip( const wxRegion &region );
 400 #ifdef __WXMSW__
 401     cairo_surface_t* m_mswSurface;
 402 #endif
 403
 404     // clips drawings to the rect
 405     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 406
 407     // resets the clipping to original extent
 408     virtual void ResetClip();
 409
 410     virtual void * GetNativeContext();
 411
 412     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
 413
 414     virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation);
 415
 416     virtual bool SetCompositionMode(wxCompositionMode op);
 417
 418     virtual void BeginLayer(wxDouble opacity);
 419
 420     virtual void EndLayer();
 421
 422     virtual void StrokePath( const wxGraphicsPath& p );
 423     virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxWINDING_RULE );
 424
 425     virtual void Translate( wxDouble dx , wxDouble dy );
 426     virtual void Scale( wxDouble xScale , wxDouble yScale );
 427     virtual void Rotate( wxDouble angle );
 428
 429     // concatenates this transform with the current transform of this context
 430     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 431
 432     // sets the transform of this context
 433     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 434
 435     // gets the matrix of this context
 436     virtual wxGraphicsMatrix GetTransform() const;
 437
 438     virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 439     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 440     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 441     virtual void PushState();
 442     virtual void PopState();
 443
 444     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 445                                 wxDouble *descent, wxDouble *externalLeading ) const;
 446     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 447
 448 protected:
 449     virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
 450
 451     void Init(cairo_t *context);
 452
 453 private:
 454     cairo_t* m_context;
 455
 456     wxVector<float> m_layerOpacities;
 457
 458     wxDECLARE_NO_COPY_CLASS(wxCairoContext);
 459 };
 460
 461 #if wxUSE_IMAGE
 462 // ----------------------------------------------------------------------------
 463 // wxCairoImageContext: context associated with a wxImage.
 464 // ----------------------------------------------------------------------------
 465
 466 class wxCairoImageContext : public wxCairoContext
 467 {
 468 public:
 469     wxCairoImageContext(wxGraphicsRenderer* renderer, wxImage& image) :
 470         wxCairoContext(renderer),
 471         m_image(image),
 472         m_data(renderer, image)
 473     {
 474         Init(cairo_create(m_data.GetCairoSurface()));
 475     }
 476
 477     virtual ~wxCairoImageContext()
 478     {
 479         m_image = m_data.ConvertToImage();
 480     }
 481
 482 private:
 483     wxImage& m_image;
 484     wxCairoBitmapData m_data;
 485
 486     wxDECLARE_NO_COPY_CLASS(wxCairoImageContext);
 487 };
 488 #endif // wxUSE_IMAGE
 489
 490 //-----------------------------------------------------------------------------
 491 // wxCairoPenData implementation
 492 //-----------------------------------------------------------------------------
 493
 494 wxCairoPenData::~wxCairoPenData()
 495 {
 496     delete[] m_userLengths;
 497 }
 498
 499 void wxCairoPenData::Init()
 500 {
 501     m_lengths = NULL;
 502     m_userLengths = NULL;
 503     m_width = 0;
 504     m_count = 0;
 505 }
 506
 507 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 508 : wxGraphicsObjectRefData(renderer)
 509 {
 510     Init();
 511     m_pen = pen;
 512     m_width = m_pen.GetWidth();
 513     if (m_width <= 0.0)
 514         m_width = 0.1;
 515
 516     m_red = m_pen.GetColour().Red()/255.0;
 517     m_green = m_pen.GetColour().Green()/255.0;
 518     m_blue = m_pen.GetColour().Blue()/255.0;
 519     m_alpha = m_pen.GetColour().Alpha()/255.0;
 520
 521     switch ( m_pen.GetCap() )
 522     {
 523     case wxCAP_ROUND :
 524         m_cap = CAIRO_LINE_CAP_ROUND;
 525         break;
 526
 527     case wxCAP_PROJECTING :
 528         m_cap = CAIRO_LINE_CAP_SQUARE;
 529         break;
 530
 531     case wxCAP_BUTT :
 532         m_cap = CAIRO_LINE_CAP_BUTT;
 533         break;
 534
 535     default :
 536         m_cap = CAIRO_LINE_CAP_BUTT;
 537         break;
 538     }
 539
 540     switch ( m_pen.GetJoin() )
 541     {
 542     case wxJOIN_BEVEL :
 543         m_join = CAIRO_LINE_JOIN_BEVEL;
 544         break;
 545
 546     case wxJOIN_MITER :
 547         m_join = CAIRO_LINE_JOIN_MITER;
 548         break;
 549
 550     case wxJOIN_ROUND :
 551         m_join = CAIRO_LINE_JOIN_ROUND;
 552         break;
 553
 554     default :
 555         m_join = CAIRO_LINE_JOIN_MITER;
 556         break;
 557     }
 558
 559     const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
 560     const double dotted[] =
 561     {
 562         dashUnit , dashUnit + 2.0
 563     };
 564     static const double short_dashed[] =
 565     {
 566         9.0 , 6.0
 567     };
 568     static const double dashed[] =
 569     {
 570         19.0 , 9.0
 571     };
 572     static const double dotted_dashed[] =
 573     {
 574         9.0 , 6.0 , 3.0 , 3.0
 575     };
 576
 577     switch ( m_pen.GetStyle() )
 578     {
 579     case wxPENSTYLE_SOLID :
 580         break;
 581
 582     case wxPENSTYLE_DOT :
 583         m_count = WXSIZEOF(dotted);
 584         m_userLengths = new double[ m_count ] ;
 585         memcpy( m_userLengths, dotted, sizeof(dotted) );
 586         m_lengths = m_userLengths;
 587         break;
 588
 589     case wxPENSTYLE_LONG_DASH :
 590         m_lengths = dashed ;
 591         m_count = WXSIZEOF(dashed);
 592         break;
 593
 594     case wxPENSTYLE_SHORT_DASH :
 595         m_lengths = short_dashed ;
 596         m_count = WXSIZEOF(short_dashed);
 597         break;
 598
 599     case wxPENSTYLE_DOT_DASH :
 600         m_lengths = dotted_dashed ;
 601         m_count = WXSIZEOF(dotted_dashed);
 602         break;
 603
 604     case wxPENSTYLE_USER_DASH :
 605         {
 606             wxDash *wxdashes ;
 607             m_count = m_pen.GetDashes( &wxdashes ) ;
 608             if ((wxdashes != NULL) && (m_count > 0))
 609             {
 610                 m_userLengths = new double[m_count] ;
 611                 for ( int i = 0 ; i < m_count ; ++i )
 612                 {
 613                     m_userLengths[i] = wxdashes[i] * dashUnit ;
 614
 615                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 616                         m_userLengths[i] = dashUnit + 2.0 ;
 617                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 618                         m_userLengths[i] = dashUnit ;
 619                 }
 620             }
 621             m_lengths = m_userLengths ;
 622         }
 623         break;
 624     case wxPENSTYLE_STIPPLE :
 625         {
 626             /*
 627             wxBitmap* bmp = pen.GetStipple();
 628             if ( bmp && bmp->IsOk() )
 629             {
 630             wxDELETE( m_penImage );
 631             wxDELETE( m_penBrush );
 632             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 633             m_penBrush = new TextureBrush(m_penImage);
 634             m_pen->SetBrush( m_penBrush );
 635             }
 636             */
 637         }
 638         break;
 639     default :
 640         if ( m_pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH
 641             && m_pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
 642         {
 643             /*
 644             wxDELETE( m_penBrush );
 645             HatchStyle style = HatchStyleHorizontal;
 646             switch( pen.GetStyle() )
 647             {
 648             case wxPENSTYLE_BDIAGONAL_HATCH :
 649             style = HatchStyleBackwardDiagonal;
 650             break ;
 651             case wxPENSTYLE_CROSSDIAG_HATCH :
 652             style = HatchStyleDiagonalCross;
 653             break ;
 654             case wxPENSTYLE_FDIAGONAL_HATCH :
 655             style = HatchStyleForwardDiagonal;
 656             break ;
 657             case wxPENSTYLE_CROSS_HATCH :
 658             style = HatchStyleCross;
 659             break ;
 660             case wxPENSTYLE_HORIZONTAL_HATCH :
 661             style = HatchStyleHorizontal;
 662             break ;
 663             case wxPENSTYLE_VERTICAL_HATCH :
 664             style = HatchStyleVertical;
 665             break ;
 666
 667             }
 668             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 669             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 670             m_pen->SetBrush( m_penBrush )
 671             */
 672         }
 673         break;
 674     }
 675 }
 676
 677 void wxCairoPenData::Apply( wxGraphicsContext* context )
 678 {
 679     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 680     cairo_set_line_width(ctext,m_width);
 681     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 682     cairo_set_line_cap(ctext,m_cap);
 683     cairo_set_line_join(ctext,m_join);
 684     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 685 }
 686
 687 //-----------------------------------------------------------------------------
 688 // wxCairoBrushData implementation
 689 //-----------------------------------------------------------------------------
 690
 691 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 692   : wxGraphicsObjectRefData( renderer )
 693 {
 694     Init();
 695 }
 696
 697 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
 698   : wxGraphicsObjectRefData(renderer)
 699 {
 700     Init();
 701
 702     m_red = brush.GetColour().Red()/255.0;
 703     m_green = brush.GetColour().Green()/255.0;
 704     m_blue = brush.GetColour().Blue()/255.0;
 705     m_alpha = brush.GetColour().Alpha()/255.0;
 706     /*
 707     if ( brush.GetStyle() == wxBRUSHSTYLE_SOLID)
 708     {
 709     m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 710     brush.GetColour().Green() , brush.GetColour().Blue() ) );
 711     }
 712     else if ( brush.IsHatch() )
 713     {
 714     HatchStyle style = HatchStyleHorizontal;
 715     switch( brush.GetStyle() )
 716     {
 717     case wxBRUSHSTYLE_BDIAGONAL_HATCH :
 718     style = HatchStyleBackwardDiagonal;
 719     break ;
 720     case wxBRUSHSTYLE_CROSSDIAG_HATCH :
 721     style = HatchStyleDiagonalCross;
 722     break ;
 723     case wxBRUSHSTYLE_FDIAGONAL_HATCH :
 724     style = HatchStyleForwardDiagonal;
 725     break ;
 726     case wxBRUSHSTYLE_CROSS_HATCH :
 727     style = HatchStyleCross;
 728     break ;
 729     case wxBRUSHSTYLE_HORIZONTAL_HATCH :
 730     style = HatchStyleHorizontal;
 731     break ;
 732     case wxBRUSHSTYLE_VERTICAL_HATCH :
 733     style = HatchStyleVertical;
 734     break ;
 735
 736     }
 737     m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 738     brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 739     }
 740     else
 741     {
 742     wxBitmap* bmp = brush.GetStipple();
 743     if ( bmp && bmp->IsOk() )
 744     {
 745     wxDELETE( m_brushImage );
 746     m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 747     m_brush = new TextureBrush(m_brushImage);
 748     }
 749     }
 750     */
 751 }
 752
 753 wxCairoBrushData::~wxCairoBrushData ()
 754 {
 755     if (m_brushPattern)
 756         cairo_pattern_destroy(m_brushPattern);
 757 }
 758
 759 void wxCairoBrushData::Apply( wxGraphicsContext* context )
 760 {
 761     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 762     if ( m_brushPattern )
 763     {
 764         cairo_set_source(ctext,m_brushPattern);
 765     }
 766     else
 767     {
 768         cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 769     }
 770 }
 771
 772 void wxCairoBrushData::AddGradientStops(const wxGraphicsGradientStops& stops)
 773 {
 774     // loop over all the stops, they include the beginning and ending ones
 775     const unsigned numStops = stops.GetCount();
 776     for ( unsigned n = 0; n < numStops; n++ )
 777     {
 778         const wxGraphicsGradientStop stop = stops.Item(n);
 779
 780         const wxColour col = stop.GetColour();
 781
 782         cairo_pattern_add_color_stop_rgba
 783         (
 784             m_brushPattern,
 785             stop.GetPosition(),
 786             col.Red()/255.0,
 787             col.Green()/255.0,
 788             col.Blue()/255.0,
 789             col.Alpha()/255.0
 790         );
 791     }
 792
 793     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS,
 794                  wxT("Couldn't create cairo pattern"));
 795 }
 796
 797 void
 798 wxCairoBrushData::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 799                                             wxDouble x2, wxDouble y2,
 800                                             const wxGraphicsGradientStops& stops)
 801 {
 802     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 803
 804     AddGradientStops(stops);
 805 }
 806
 807 void
 808 wxCairoBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 809                                             wxDouble xc, wxDouble yc,
 810                                             wxDouble radius,
 811                                             const wxGraphicsGradientStops& stops)
 812 {
 813     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 814
 815     AddGradientStops(stops);
 816 }
 817
 818 void wxCairoBrushData::Init()
 819 {
 820     m_brushPattern = NULL;
 821 }
 822
 823 //-----------------------------------------------------------------------------
 824 // wxCairoFontData implementation
 825 //-----------------------------------------------------------------------------
 826
 827 void wxCairoFontData::InitColour(const wxColour& col)
 828 {
 829     m_red = col.Red()/255.0;
 830     m_green = col.Green()/255.0;
 831     m_blue = col.Blue()/255.0;
 832     m_alpha = col.Alpha()/255.0;
 833 }
 834
 835 void
 836 wxCairoFontData::InitFontComponents(const wxString& facename,
 837                                     cairo_font_slant_t slant,
 838                                     cairo_font_weight_t weight)
 839 {
 840     m_fontName = facename.mb_str(wxConvUTF8);
 841     m_slant = slant;
 842     m_weight = weight;
 843 }
 844
 845 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 846                          const wxColour& col )
 847     : wxGraphicsObjectRefData(renderer)
 848 #ifdef __WXGTK__
 849     , m_wxfont(font)
 850 #endif
 851 {
 852     InitColour(col);
 853
 854     m_size = font.GetPointSize();
 855
 856 #ifdef __WXMAC__
 857     m_font = cairo_quartz_font_face_create_for_cgfont( font.OSXGetCGFont() );
 858 #elif defined(__WXGTK__)
 859 #else
 860     InitFontComponents
 861     (
 862         font.GetFaceName(),
 863         font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC
 864                                               : CAIRO_FONT_SLANT_NORMAL,
 865         font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD
 866                                               : CAIRO_FONT_WEIGHT_NORMAL
 867     );
 868 #endif
 869 }
 870
 871 wxCairoFontData::wxCairoFontData(wxGraphicsRenderer* renderer,
 872                                  double sizeInPixels,
 873                                  const wxString& facename,
 874                                  int flags,
 875                                  const wxColour& col) :
 876     wxGraphicsObjectRefData(renderer)
 877 {
 878     InitColour(col);
 879
 880     // Resolution for Cairo image surfaces is 72 DPI meaning that the sizes in
 881     // points and pixels are identical, so we can just pass the size in pixels
 882     // directly to cairo_set_font_size().
 883     m_size = sizeInPixels;
 884
 885 #if defined(__WXMAC__)
 886     m_font = NULL;
 887 #endif
 888
 889     // There is no need to set m_underlined under wxGTK in this case, it can
 890     // only be used if m_font != NULL.
 891
 892     InitFontComponents
 893     (
 894         facename,
 895         flags & wxFONTFLAG_ITALIC ? CAIRO_FONT_SLANT_ITALIC
 896                                   : CAIRO_FONT_SLANT_NORMAL,
 897         flags & wxFONTFLAG_BOLD ? CAIRO_FONT_WEIGHT_BOLD
 898                                 : CAIRO_FONT_WEIGHT_NORMAL
 899     );
 900 }
 901
 902 wxCairoFontData::~wxCairoFontData()
 903 {
 904 #ifdef __WXMAC__
 905     if ( m_font )
 906         cairo_font_face_destroy( m_font );
 907 #endif
 908 }
 909
 910 bool wxCairoFontData::Apply( wxGraphicsContext* context )
 911 {
 912     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 913     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 914 #ifdef __WXGTK__
 915     if (m_wxfont.IsOk())
 916     {
 917         // Nothing to do, the caller uses Pango layout functions to do
 918         // everything.
 919         return true;
 920     }
 921 #elif defined(__WXMAC__)
 922     if ( m_font )
 923     {
 924         cairo_set_font_face(ctext, m_font);
 925         cairo_set_font_size(ctext, m_size );
 926         return true;
 927     }
 928 #endif
 929
 930     // If we get here, we must be on a platform without native font support or
 931     // we're using toy Cairo API even under wxGTK/wxMac.
 932     cairo_select_font_face(ctext, m_fontName, m_slant, m_weight );
 933     cairo_set_font_size(ctext, m_size );
 934
 935     // Indicate that we don't use native fonts for the platforms which care
 936     // about this (currently only wxGTK).
 937     return false;
 938 }
 939
 940 //-----------------------------------------------------------------------------
 941 // wxCairoPathData implementation
 942 //-----------------------------------------------------------------------------
 943
 944 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
 945     : wxGraphicsPathData(renderer)
 946 {
 947     if (pathcontext)
 948     {
 949         m_pathContext = pathcontext;
 950     }
 951     else
 952     {
 953         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 954         m_pathContext = cairo_create(surface);
 955         cairo_surface_destroy (surface);
 956     }
 957 }
 958
 959 wxCairoPathData::~wxCairoPathData()
 960 {
 961     cairo_destroy(m_pathContext);
 962 }
 963
 964 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
 965 {
 966     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 967     cairo_t* pathcontext = cairo_create(surface);
 968     cairo_surface_destroy (surface);
 969
 970     cairo_path_t* path = cairo_copy_path(m_pathContext);
 971     cairo_append_path(pathcontext, path);
 972     cairo_path_destroy(path);
 973     return new wxCairoPathData( GetRenderer() ,pathcontext);
 974 }
 975
 976
 977 void* wxCairoPathData::GetNativePath() const
 978 {
 979     return cairo_copy_path(m_pathContext) ;
 980 }
 981
 982 void wxCairoPathData::UnGetNativePath(void *p) const
 983 {
 984     cairo_path_destroy((cairo_path_t*)p);
 985 }
 986
 987 //
 988 // The Primitives
 989 //
 990
 991 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
 992 {
 993     cairo_move_to(m_pathContext,x,y);
 994 }
 995
 996 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
 997 {
 998     cairo_line_to(m_pathContext,x,y);
 999 }
1000
1001 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
1002 {
1003     cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
1004     cairo_append_path(m_pathContext, p);
1005     UnGetNativePath(p);
1006 }
1007
1008 void wxCairoPathData::CloseSubpath()
1009 {
1010     cairo_close_path(m_pathContext);
1011 }
1012
1013 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
1014 {
1015     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
1016 }
1017
1018 // gets the last point of the current path, (0,0) if not yet set
1019 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
1020 {
1021     double dx,dy;
1022     cairo_get_current_point(m_pathContext,&dx,&dy);
1023     if (x)
1024         *x = dx;
1025     if (y)
1026         *y = dy;
1027 }
1028
1029 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
1030 {
1031     // as clockwise means positive in our system (y pointing downwards)
1032     // TODO make this interpretation dependent of the
1033     // real device trans
1034     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
1035         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
1036     else
1037         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
1038 }
1039
1040 // transforms each point of this path by the matrix
1041 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
1042 {
1043     // as we don't have a true path object, we have to apply the inverse
1044     // matrix to the context
1045     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
1046     cairo_matrix_invert( &m );
1047     cairo_transform(m_pathContext,&m);
1048 }
1049
1050 // gets the bounding box enclosing all points (possibly including control points)
1051 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
1052 {
1053     double x1,y1,x2,y2;
1054
1055     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
1056     if ( x2 < x1 )
1057     {
1058         *x = x2;
1059         *w = x1-x2;
1060     }
1061     else
1062     {
1063         *x = x1;
1064         *w = x2-x1;
1065     }
1066
1067     if( y2 < y1 )
1068     {
1069         *y = y2;
1070         *h = y1-y2;
1071     }
1072     else
1073     {
1074         *y = y1;
1075         *h = y2-y1;
1076     }
1077 }
1078
1079 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle ) const
1080 {
1081     cairo_set_fill_rule(m_pathContext,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1082     return cairo_in_fill( m_pathContext, x, y) != 0;
1083 }
1084
1085 //-----------------------------------------------------------------------------
1086 // wxCairoMatrixData implementation
1087 //-----------------------------------------------------------------------------
1088
1089 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
1090     : wxGraphicsMatrixData(renderer)
1091 {
1092     if ( matrix )
1093         m_matrix = *matrix;
1094 }
1095
1096 wxCairoMatrixData::~wxCairoMatrixData()
1097 {
1098     // nothing to do
1099 }
1100
1101 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
1102 {
1103     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
1104 }
1105
1106 // concatenates the matrix
1107 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
1108 {
1109     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
1110 }
1111
1112 // sets the matrix to the respective values
1113 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1114                         wxDouble tx, wxDouble ty)
1115 {
1116     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
1117 }
1118
1119 // gets the component valuess of the matrix
1120 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
1121                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
1122 {
1123     if (a)  *a = m_matrix.xx;
1124     if (b)  *b = m_matrix.yx;
1125     if (c)  *c = m_matrix.xy;
1126     if (d)  *d = m_matrix.yy;
1127     if (tx) *tx= m_matrix.x0;
1128     if (ty) *ty= m_matrix.y0;
1129 }
1130
1131 // makes this the inverse matrix
1132 void wxCairoMatrixData::Invert()
1133 {
1134     cairo_matrix_invert( &m_matrix );
1135 }
1136
1137 // returns true if the elements of the transformation matrix are equal ?
1138 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
1139 {
1140     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
1141     return (
1142         m_matrix.xx == tm->xx &&
1143         m_matrix.yx == tm->yx &&
1144         m_matrix.xy == tm->xy &&
1145         m_matrix.yy == tm->yy &&
1146         m_matrix.x0 == tm->x0 &&
1147         m_matrix.y0 == tm->y0 ) ;
1148 }
1149
1150 // return true if this is the identity matrix
1151 bool wxCairoMatrixData::IsIdentity() const
1152 {
1153     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
1154         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
1155 }
1156
1157 //
1158 // transformation
1159 //
1160
1161 // add the translation to this matrix
1162 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
1163 {
1164     cairo_matrix_translate( &m_matrix, dx, dy) ;
1165 }
1166
1167 // add the scale to this matrix
1168 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
1169 {
1170     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
1171 }
1172
1173 // add the rotation to this matrix (radians)
1174 void wxCairoMatrixData::Rotate( wxDouble angle )
1175 {
1176     cairo_matrix_rotate( &m_matrix, angle) ;
1177 }
1178
1179 //
1180 // apply the transforms
1181 //
1182
1183 // applies that matrix to the point
1184 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
1185 {
1186     double lx = *x, ly = *y ;
1187     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
1188     *x = lx;
1189     *y = ly;
1190 }
1191
1192 // applies the matrix except for translations
1193 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1194 {
1195     double lx = *dx, ly = *dy ;
1196     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1197     *dx = lx;
1198     *dy = ly;
1199 }
1200
1201 // returns the native representation
1202 void * wxCairoMatrixData::GetNativeMatrix() const
1203 {
1204     return (void*) &m_matrix;
1205 }
1206
1207 // ----------------------------------------------------------------------------
1208 // wxCairoBitmap implementation
1209 // ----------------------------------------------------------------------------
1210
1211 int wxCairoBitmapData::InitBuffer(int width, int height, cairo_format_t format)
1212 {
1213     wxUnusedVar(format); // Only really unused with Cairo < 1.6.
1214
1215     // Determine the stride: use cairo_format_stride_for_width() if available
1216     // but fall back to 4*width for the earlier versions as this is what that
1217     // function always returns, even in latest Cairo, anyhow.
1218     int stride;
1219 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 6, 0)
1220     if ( cairo_version() >= CAIRO_VERSION_ENCODE(1, 6, 0) )
1221     {
1222         stride = cairo_format_stride_for_width(format, width);
1223
1224         // All our code would totally break if stride were not a multiple of 4
1225         // so ensure this is the case.
1226         if ( stride % 4 )
1227         {
1228             wxFAIL_MSG("Unexpected Cairo image surface stride.");
1229
1230             stride += 4 - stride % 4;
1231         }
1232     }
1233     else
1234 #endif
1235         stride = 4*width;
1236
1237     m_width = width;
1238     m_height = height;
1239     m_buffer = new unsigned char[height*stride];
1240
1241     return stride;
1242 }
1243
1244 void wxCairoBitmapData::InitSurface(cairo_format_t format, int stride)
1245 {
1246     m_surface = cairo_image_surface_create_for_data(
1247                             m_buffer, format, m_width, m_height, stride);
1248     m_pattern = cairo_pattern_create_for_surface(m_surface);
1249 }
1250
1251 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap ) :
1252     wxGraphicsObjectRefData( renderer )
1253 {
1254     m_surface = bitmap;
1255     m_pattern = cairo_pattern_create_for_surface(m_surface);
1256 }
1257
1258 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp ) : wxGraphicsObjectRefData( renderer )
1259 {
1260     wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1261
1262 #ifdef wxHAS_RAW_BITMAP
1263     // Create a surface object and copy the bitmap pixel data to it.  if the
1264     // image has alpha (or a mask represented as alpha) then we'll use a
1265     // different format and iterator than if it doesn't...
1266     cairo_format_t bufferFormat = bmp.GetDepth() == 32
1267 #ifdef __WXGTK__
1268                                             || bmp.GetMask()
1269 #endif
1270                                         ? CAIRO_FORMAT_ARGB32
1271                                         : CAIRO_FORMAT_RGB24;
1272
1273     int stride = InitBuffer(bmp.GetWidth(), bmp.GetHeight(), bufferFormat);
1274
1275     wxBitmap bmpSource = bmp;  // we need a non-const instance
1276     wxUint32* data = (wxUint32*)m_buffer;
1277
1278     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1279     {
1280         // use the bitmap's alpha
1281         wxAlphaPixelData
1282             pixData(bmpSource, wxPoint(0, 0), wxSize(m_width, m_height));
1283         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1284
1285         wxAlphaPixelData::Iterator p(pixData);
1286         for (int y=0; y<m_height; y++)
1287         {
1288             wxAlphaPixelData::Iterator rowStart = p;
1289             wxUint32* const rowStartDst = data;
1290             for (int x=0; x<m_width; x++)
1291             {
1292                 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1293                 // with alpha in the upper 8 bits, then red, then green, then
1294                 // blue. The 32-bit quantities are stored native-endian.
1295                 // Pre-multiplied alpha is used.
1296                 unsigned char alpha = p.Alpha();
1297                 if (alpha == 0)
1298                     *data = 0;
1299                 else
1300                     *data = ( alpha                      << 24
1301                               | (p.Red() * alpha/255)    << 16
1302                               | (p.Green() * alpha/255)  <<  8
1303                               | (p.Blue() * alpha/255) );
1304                 ++data;
1305                 ++p;
1306             }
1307
1308             data = rowStartDst + stride / 4;
1309             p = rowStart;
1310             p.OffsetY(pixData, 1);
1311         }
1312     }
1313     else  // no alpha
1314     {
1315         wxNativePixelData
1316             pixData(bmpSource, wxPoint(0, 0), wxSize(m_width, m_height));
1317         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1318
1319         wxNativePixelData::Iterator p(pixData);
1320         for (int y=0; y<m_height; y++)
1321         {
1322             wxNativePixelData::Iterator rowStart = p;
1323             wxUint32* const rowStartDst = data;
1324             for (int x=0; x<m_width; x++)
1325             {
1326                 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1327                 // the upper 8 bits unused. Red, Green, and Blue are stored in
1328                 // the remaining 24 bits in that order.  The 32-bit quantities
1329                 // are stored native-endian.
1330                 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1331                 ++data;
1332                 ++p;
1333             }
1334
1335             data = rowStartDst + stride / 4;
1336             p = rowStart;
1337             p.OffsetY(pixData, 1);
1338         }
1339     }
1340 #ifdef __WXMSW__
1341     // if there is a mask, set the alpha bytes in the target buffer to
1342     // fully transparent or fully opaque
1343     if (bmpSource.GetMask())
1344     {
1345         wxBitmap bmpMask = bmpSource.GetMaskBitmap();
1346         bufferFormat = CAIRO_FORMAT_ARGB32;
1347         data = (wxUint32*)m_buffer;
1348         wxNativePixelData
1349             pixData(bmpMask, wxPoint(0, 0), wxSize(m_width, m_height));
1350         wxCHECK_RET( pixData, wxT("Failed to gain raw access to mask data."));
1351
1352         wxNativePixelData::Iterator p(pixData);
1353         for (int y=0; y<m_height; y++)
1354         {
1355             wxNativePixelData::Iterator rowStart = p;
1356             wxUint32* const rowStartDst = data;
1357             for (int x=0; x<m_width; x++)
1358             {
1359                 if (p.Red()+p.Green()+p.Blue() == 0)
1360                     *data = 0;
1361                 else
1362                     *data = (wxALPHA_OPAQUE << 24) | (*data & 0x00FFFFFF);
1363                 ++data;
1364                 ++p;
1365             }
1366
1367             data = rowStartDst + stride / 4;
1368             p = rowStart;
1369             p.OffsetY(pixData, 1);
1370         }
1371     }
1372 #endif
1373
1374     InitSurface(bufferFormat, stride);
1375 #endif // wxHAS_RAW_BITMAP
1376 }
1377
1378 #if wxUSE_IMAGE
1379
1380 // Helper functions for dealing with alpha pre-multiplication.
1381 namespace
1382 {
1383
1384 inline unsigned char Premultiply(unsigned char alpha, unsigned char data)
1385 {
1386     return alpha ? (data * alpha)/0xff : data;
1387 }
1388
1389 inline unsigned char Unpremultiply(unsigned char alpha, unsigned char data)
1390 {
1391     return alpha ? (data * 0xff)/alpha : data;
1392 }
1393
1394 } // anonymous namespace
1395
1396 wxCairoBitmapData::wxCairoBitmapData(wxGraphicsRenderer* renderer,
1397                                      const wxImage& image)
1398     : wxGraphicsObjectRefData(renderer)
1399 {
1400     const cairo_format_t bufferFormat = image.HasAlpha()
1401                                             ? CAIRO_FORMAT_ARGB32
1402                                             : CAIRO_FORMAT_RGB24;
1403
1404     int stride = InitBuffer(image.GetWidth(), image.GetHeight(), bufferFormat);
1405
1406     // Copy wxImage data into the buffer. Notice that we work with wxUint32
1407     // values and not bytes becase Cairo always works with buffers in native
1408     // endianness.
1409     wxUint32* dst = reinterpret_cast<wxUint32*>(m_buffer);
1410     const unsigned char* src = image.GetData();
1411
1412     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1413     {
1414         const unsigned char* alpha = image.GetAlpha();
1415
1416         for ( int y = 0; y < m_height; y++ )
1417         {
1418             wxUint32* const rowStartDst = dst;
1419
1420             for ( int x = 0; x < m_width; x++ )
1421             {
1422                 const unsigned char a = *alpha++;
1423
1424                 *dst++ = a                      << 24 |
1425                          Premultiply(a, src[0]) << 16 |
1426                          Premultiply(a, src[1]) <<  8 |
1427                          Premultiply(a, src[2]);
1428                 src += 3;
1429             }
1430
1431             dst = rowStartDst + stride / 4;
1432         }
1433     }
1434     else // RGB
1435     {
1436         for ( int y = 0; y < m_height; y++ )
1437         {
1438             wxUint32* const rowStartDst = dst;
1439
1440             for ( int x = 0; x < m_width; x++ )
1441             {
1442                 *dst++ = src[0] << 16 |
1443                          src[1] <<  8 |
1444                          src[2];
1445                 src += 3;
1446             }
1447
1448             dst = rowStartDst + stride / 4;
1449         }
1450     }
1451
1452     InitSurface(bufferFormat, stride);
1453 }
1454
1455 wxImage wxCairoBitmapData::ConvertToImage() const
1456 {
1457     wxImage image(m_width, m_height, false /* don't clear */);
1458
1459     // Get the surface type and format.
1460     wxCHECK_MSG( cairo_surface_get_type(m_surface) == CAIRO_SURFACE_TYPE_IMAGE,
1461                  wxNullImage,
1462                  wxS("Can't convert non-image surface to image.") );
1463
1464     switch ( cairo_image_surface_get_format(m_surface) )
1465     {
1466         case CAIRO_FORMAT_ARGB32:
1467             image.SetAlpha();
1468             break;
1469
1470         case CAIRO_FORMAT_RGB24:
1471             // Nothing to do, we don't use alpha by default.
1472             break;
1473
1474         case CAIRO_FORMAT_A8:
1475         case CAIRO_FORMAT_A1:
1476             wxFAIL_MSG(wxS("Unsupported Cairo image surface type."));
1477             return wxNullImage;
1478
1479         default:
1480             wxFAIL_MSG(wxS("Unknown Cairo image surface type."));
1481             return wxNullImage;
1482     }
1483
1484     // Prepare for copying data.
1485     const wxUint32* src = (wxUint32*)cairo_image_surface_get_data(m_surface);
1486     wxCHECK_MSG( src, wxNullImage, wxS("Failed to get Cairo surface data.") );
1487
1488     int stride = cairo_image_surface_get_stride(m_surface);
1489     wxCHECK_MSG( stride > 0, wxNullImage,
1490                  wxS("Failed to get Cairo surface stride.") );
1491
1492     // As we work with wxUint32 pointers and not char ones, we need to adjust
1493     // the stride accordingly. This should be lossless as the stride must be a
1494     // multiple of pixel size.
1495     wxASSERT_MSG( !(stride % sizeof(wxUint32)), wxS("Unexpected stride.") );
1496     stride /= sizeof(wxUint32);
1497
1498     unsigned char* dst = image.GetData();
1499     unsigned char *alpha = image.GetAlpha();
1500     if ( alpha )
1501     {
1502         // We need to also copy alpha and undo the pre-multiplication as Cairo
1503         // stores pre-multiplied values in this format while wxImage does not.
1504         for ( int y = 0; y < m_height; y++ )
1505         {
1506             const wxUint32* const rowStart = src;
1507             for ( int x = 0; x < m_width; x++ )
1508             {
1509                 const wxUint32 argb = *src++;
1510
1511                 *alpha++ = (argb & 0xff000000) >> 24;
1512
1513                 // Copy the RGB data undoing the pre-multiplication.
1514                 *dst++ = Unpremultiply(*alpha, (argb & 0x00ff0000) >> 16);
1515                 *dst++ = Unpremultiply(*alpha, (argb & 0x0000ff00) >>  8);
1516                 *dst++ = Unpremultiply(*alpha, (argb & 0x000000ff));
1517             }
1518
1519             src = rowStart + stride;
1520         }
1521     }
1522     else // RGB
1523     {
1524         // Things are pretty simple in this case, just copy RGB bytes.
1525         for ( int y = 0; y < m_height; y++ )
1526         {
1527             const wxUint32* const rowStart = src;
1528             for ( int x = 0; x < m_width; x++ )
1529             {
1530                 const wxUint32 argb = *src++;
1531
1532                 *dst++ = (argb & 0x00ff0000) >> 16;
1533                 *dst++ = (argb & 0x0000ff00) >>  8;
1534                 *dst++ = (argb & 0x000000ff);
1535             }
1536
1537             src = rowStart + stride;
1538         }
1539     }
1540
1541     return image;
1542 }
1543
1544 #endif // wxUSE_IMAGE
1545
1546 wxCairoBitmapData::~wxCairoBitmapData()
1547 {
1548     if (m_pattern)
1549         cairo_pattern_destroy(m_pattern);
1550
1551     if (m_surface)
1552         cairo_surface_destroy(m_surface);
1553
1554     delete [] m_buffer;
1555 }
1556
1557 //-----------------------------------------------------------------------------
1558 // wxCairoContext implementation
1559 //-----------------------------------------------------------------------------
1560
1561 class wxCairoOffsetHelper
1562 {
1563 public :
1564     wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1565     {
1566         m_ctx = ctx;
1567         m_offset = offset;
1568         if ( m_offset )
1569              cairo_translate( m_ctx, 0.5, 0.5 );
1570     }
1571     ~wxCairoOffsetHelper( )
1572     {
1573         if ( m_offset )
1574             cairo_translate( m_ctx, -0.5, -0.5 );
1575     }
1576 public :
1577     cairo_t* m_ctx;
1578     bool m_offset;
1579 } ;
1580
1581 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1582 : wxGraphicsContext(renderer)
1583 {
1584 #ifdef __WXMSW__
1585     // wxMSW contexts always use MM_ANISOTROPIC, which messes up
1586     // text rendering when printing using Cairo. Switch it to MM_TEXT
1587     // map mode to avoid this problem.
1588     HDC hdc = (HDC)dc.GetHDC();
1589     ::SetMapMode(hdc, MM_TEXT);
1590     m_mswSurface = cairo_win32_printing_surface_create(hdc);
1591     Init( cairo_create(m_mswSurface) );
1592 #endif
1593
1594 #ifdef __WXGTK20__
1595     const wxDCImpl *impl = dc.GetImpl();
1596     Init( (cairo_t*) impl->GetCairoContext() );
1597 #endif
1598     wxSize sz = dc.GetSize();
1599     m_width = sz.x;
1600     m_height = sz.y;
1601
1602     wxPoint org = dc.GetDeviceOrigin();
1603     cairo_translate( m_context, org.x, org.y );
1604
1605     double sx,sy;
1606     dc.GetUserScale( &sx, &sy );
1607
1608 // TODO: Determine if these fixes are needed on other platforms too.
1609 // On MSW, without this the printer context will not respect wxDC SetMapMode calls.
1610 // For example, using dc.SetMapMode(wxMM_POINTS) can let us share printer and screen
1611 // drawing code
1612 #ifdef __WXMSW__
1613     double lsx,lsy;
1614     dc.GetLogicalScale( &lsx, &lsy );
1615     sx *= lsx;
1616     sy *= lsy;
1617 #endif
1618     cairo_scale( m_context, sx, sy );
1619
1620     org = dc.GetLogicalOrigin();
1621     cairo_translate( m_context, -org.x, -org.y );
1622 }
1623
1624 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1625 : wxGraphicsContext(renderer)
1626 {
1627     int width, height;
1628     dc.GetSize( &width, &height );
1629     m_width = width;
1630     m_height = height;
1631
1632     m_enableOffset = true;
1633
1634 #ifdef __WXMSW__
1635     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1636     Init( cairo_create(m_mswSurface) );
1637 #endif
1638
1639 #ifdef __WXGTK20__
1640     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1641     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1642
1643 #if 0
1644     wxGraphicsMatrix matrix = CreateMatrix();
1645
1646     wxPoint org = dc.GetDeviceOrigin();
1647     matrix.Translate( org.x, org.y );
1648
1649     org = dc.GetLogicalOrigin();
1650     matrix.Translate( -org.x, -org.y );
1651
1652     double sx,sy;
1653     dc.GetUserScale( &sx, &sy );
1654     matrix.Scale( sx, sy );
1655
1656     ConcatTransform( matrix );
1657 #endif
1658 #endif
1659
1660 #ifdef __WXMAC__
1661     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1662     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1663     Init( cairo_create( surface ) );
1664     cairo_surface_destroy( surface );
1665 #endif
1666 }
1667
1668 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1669 : wxGraphicsContext(renderer)
1670 {
1671     int width, height;
1672     dc.GetSize( &width, &height );
1673     m_width = width;
1674     m_height = height;
1675
1676     m_enableOffset = true;
1677
1678 #ifdef __WXMSW__
1679     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1680     Init( cairo_create(m_mswSurface) );
1681 #endif
1682
1683 #ifdef __WXGTK20__
1684     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1685     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1686
1687 #if 0
1688     wxGraphicsMatrix matrix = CreateMatrix();
1689
1690     wxPoint org = dc.GetDeviceOrigin();
1691     matrix.Translate( org.x, org.y );
1692
1693     org = dc.GetLogicalOrigin();
1694     matrix.Translate( -org.x, -org.y );
1695
1696     double sx,sy;
1697     dc.GetUserScale( &sx, &sy );
1698     matrix.Scale( sx, sy );
1699
1700     ConcatTransform( matrix );
1701 #endif
1702 #endif
1703
1704 #ifdef __WXMAC__
1705     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1706     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1707     Init( cairo_create( surface ) );
1708     cairo_surface_destroy( surface );
1709 #endif
1710 }
1711
1712 #ifdef __WXGTK20__
1713 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
1714 : wxGraphicsContext(renderer)
1715 {
1716     Init( gdk_cairo_create( drawable ) );
1717
1718     int width, height;
1719     gdk_drawable_get_size( drawable, &width, &height );
1720     m_width = width;
1721     m_height = height;
1722 }
1723 #endif
1724
1725 #ifdef __WXMSW__
1726 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, HDC handle )
1727 : wxGraphicsContext(renderer)
1728 {
1729     m_mswSurface = cairo_win32_surface_create(handle);
1730     Init( cairo_create(m_mswSurface) );
1731     m_width =
1732     m_height = 0;
1733 }
1734 #endif
1735
1736
1737 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1738 : wxGraphicsContext(renderer)
1739 {
1740     Init( context );
1741     m_width =
1742     m_height = 0;
1743 }
1744
1745 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1746 : wxGraphicsContext(renderer)
1747 {
1748     m_enableOffset = true;
1749 #ifdef __WXGTK__
1750     // something along these lines (copied from dcclient)
1751
1752     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1753     // code should still be able to create wxClientDCs for them, so we will
1754     // use the parent window here then.
1755     if (window->m_wxwindow == NULL)
1756     {
1757         window = window->GetParent();
1758     }
1759
1760     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1761
1762     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1763
1764     wxSize sz = window->GetSize();
1765     m_width = sz.x;
1766     m_height = sz.y;
1767 #endif
1768
1769 #ifdef __WXMSW__
1770     m_mswSurface = cairo_win32_surface_create((HDC)window->GetHandle());
1771     Init(cairo_create(m_mswSurface));
1772 #endif
1773
1774 }
1775
1776 wxCairoContext::wxCairoContext(wxGraphicsRenderer* renderer) :
1777     wxGraphicsContext(renderer)
1778 {
1779     m_context = NULL;
1780 }
1781
1782 wxCairoContext::~wxCairoContext()
1783 {
1784     if ( m_context )
1785     {
1786         PopState();
1787         PopState();
1788         cairo_destroy(m_context);
1789     }
1790 #ifdef __WXMSW__
1791     if ( m_mswSurface )
1792         cairo_surface_destroy(m_mswSurface);
1793 #endif
1794 }
1795
1796 void wxCairoContext::Init(cairo_t *context)
1797 {
1798     m_context = context ;
1799     PushState();
1800     PushState();
1801 }
1802
1803
1804 void wxCairoContext::Clip( const wxRegion& region )
1805 {
1806     // Create a path with all the rectangles in the region
1807     wxGraphicsPath path = GetRenderer()->CreatePath();
1808     wxRegionIterator ri(region);
1809     while (ri)
1810     {
1811         path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1812         ++ri;
1813     }
1814
1815     // Put it in the context
1816     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1817     cairo_append_path(m_context, cp);
1818
1819     // clip to that path
1820     cairo_clip(m_context);
1821     path.UnGetNativePath(cp);
1822 }
1823
1824 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1825 {
1826     // Create a path with this rectangle
1827     wxGraphicsPath path = GetRenderer()->CreatePath();
1828     path.AddRectangle(x,y,w,h);
1829
1830     // Put it in the context
1831     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1832     cairo_append_path(m_context, cp);
1833
1834     // clip to that path
1835     cairo_clip(m_context);
1836     path.UnGetNativePath(cp);
1837 }
1838
1839 void wxCairoContext::ResetClip()
1840 {
1841     cairo_reset_clip(m_context);
1842 }
1843
1844
1845 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1846 {
1847     if ( !m_pen.IsNull() )
1848     {
1849         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1850         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1851         cairo_append_path(m_context,cp);
1852         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1853         cairo_stroke(m_context);
1854         path.UnGetNativePath(cp);
1855     }
1856 }
1857
1858 void wxCairoContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1859 {
1860     if ( !m_brush.IsNull() )
1861     {
1862         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1863         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1864         cairo_append_path(m_context,cp);
1865         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1866         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1867         cairo_fill(m_context);
1868         path.UnGetNativePath(cp);
1869     }
1870 }
1871
1872 void wxCairoContext::Rotate( wxDouble angle )
1873 {
1874     cairo_rotate(m_context,angle);
1875 }
1876
1877 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1878 {
1879     cairo_translate(m_context,dx,dy);
1880 }
1881
1882 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1883 {
1884     cairo_scale(m_context,xScale,yScale);
1885 }
1886
1887 // concatenates this transform with the current transform of this context
1888 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1889 {
1890     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1891 }
1892
1893 // sets the transform of this context
1894 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1895 {
1896     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1897 }
1898
1899 // gets the matrix of this context
1900 wxGraphicsMatrix wxCairoContext::GetTransform() const
1901 {
1902     wxGraphicsMatrix matrix = CreateMatrix();
1903     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1904     return matrix;
1905 }
1906
1907
1908
1909 void wxCairoContext::PushState()
1910 {
1911     cairo_save(m_context);
1912 }
1913
1914 void wxCairoContext::PopState()
1915 {
1916     cairo_restore(m_context);
1917 }
1918
1919 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1920 {
1921     wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp);
1922     DrawBitmap(bitmap, x, y, w, h);
1923
1924 }
1925
1926 void wxCairoContext::DrawBitmap(const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1927 {
1928     PushState();
1929
1930     // In case we're scaling the image by using a width and height different
1931     // than the bitmap's size create a pattern transformation on the surface and
1932     // draw the transformed pattern.
1933     wxCairoBitmapData* data = static_cast<wxCairoBitmapData*>(bmp.GetRefData());
1934     cairo_pattern_t* pattern = data->GetCairoPattern();
1935     wxSize size = data->GetSize();
1936
1937     wxDouble scaleX = w / size.GetWidth();
1938     wxDouble scaleY = h / size.GetHeight();
1939
1940     // prepare to draw the image
1941     cairo_translate(m_context, x, y);
1942     cairo_scale(m_context, scaleX, scaleY);
1943     cairo_set_source(m_context, pattern);
1944     // use the original size here since the context is scaled already...
1945     cairo_rectangle(m_context, 0, 0, size.GetWidth(), size.GetHeight());
1946     // fill the rectangle using the pattern
1947     cairo_fill(m_context);
1948
1949     PopState();
1950 }
1951
1952 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1953 {
1954     // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
1955     // start using the Cairo backend on other platforms then we may need to
1956     // fiddle with this...
1957     DrawBitmap(icon, x, y, w, h);
1958 }
1959
1960
1961 void wxCairoContext::DoDrawText(const wxString& str, wxDouble x, wxDouble y)
1962 {
1963     wxCHECK_RET( !m_font.IsNull(),
1964                  wxT("wxCairoContext::DrawText - no valid font set") );
1965
1966     if ( str.empty())
1967         return;
1968
1969     const wxCharBuffer data = str.utf8_str();
1970     if ( !data )
1971         return;
1972
1973     if ( ((wxCairoFontData*)m_font.GetRefData())->Apply(this) )
1974     {
1975 #ifdef __WXGTK__
1976         PangoLayout *layout = pango_cairo_create_layout (m_context);
1977         const wxFont& font = static_cast<wxCairoFontData*>(m_font.GetRefData())->GetFont();
1978         pango_layout_set_font_description(layout, font.GetNativeFontInfo()->description);
1979         pango_layout_set_text(layout, data, data.length());
1980         font.GTKSetPangoAttrs(layout);
1981
1982         cairo_move_to(m_context, x, y);
1983         pango_cairo_show_layout (m_context, layout);
1984
1985         g_object_unref (layout);
1986
1987         // Don't use Cairo text API, we already did everything.
1988         return;
1989 #endif
1990     }
1991
1992     // Cairo's x,y for drawing text is at the baseline, so we need to adjust
1993     // the position we move to by the ascent.
1994     cairo_font_extents_t fe;
1995     cairo_font_extents(m_context, &fe);
1996     cairo_move_to(m_context, x, y+fe.ascent);
1997
1998     cairo_show_text(m_context, data);
1999 }
2000
2001 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
2002                                     wxDouble *descent, wxDouble *externalLeading ) const
2003 {
2004     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
2005
2006     if ( width )
2007         *width = 0;
2008     if ( height )
2009         *height = 0;
2010     if ( descent )
2011         *descent = 0;
2012     if ( externalLeading )
2013         *externalLeading = 0;
2014
2015     if ( str.empty())
2016         return;
2017
2018     if ( ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this) )
2019     {
2020 #ifdef __WXGTK__
2021         int w, h;
2022
2023         PangoLayout *layout = pango_cairo_create_layout (m_context);
2024         const wxFont& font = static_cast<wxCairoFontData*>(m_font.GetRefData())->GetFont();
2025         pango_layout_set_font_description(layout, font.GetNativeFontInfo()->description);
2026         const wxCharBuffer data = str.utf8_str();
2027         if ( !data )
2028         {
2029             return;
2030         }
2031         pango_layout_set_text(layout, data, data.length());
2032         pango_layout_get_pixel_size (layout, &w, &h);
2033         if ( width )
2034             *width = w;
2035         if ( height )
2036             *height = h;
2037         if (descent)
2038         {
2039             PangoLayoutIter *iter = pango_layout_get_iter(layout);
2040             int baseline = pango_layout_iter_get_baseline(iter);
2041             pango_layout_iter_free(iter);
2042             *descent = h - PANGO_PIXELS(baseline);
2043         }
2044         g_object_unref (layout);
2045         return;
2046 #endif
2047     }
2048
2049     if (width)
2050     {
2051         const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
2052         cairo_text_extents_t te;
2053         cairo_text_extents(m_context, buf, &te);
2054         *width = te.width;
2055     }
2056
2057     if (height || descent || externalLeading)
2058     {
2059         cairo_font_extents_t fe;
2060         cairo_font_extents(m_context, &fe);
2061
2062         // some backends have negative descents
2063
2064         if ( fe.descent < 0 )
2065             fe.descent = -fe.descent;
2066
2067         if ( fe.height < (fe.ascent + fe.descent ) )
2068         {
2069             // some backends are broken re height ... (eg currently ATSUI)
2070             fe.height = fe.ascent + fe.descent;
2071         }
2072
2073         if (height)
2074             *height = fe.height;
2075         if ( descent )
2076             *descent = fe.descent;
2077         if ( externalLeading )
2078             *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
2079     }
2080 }
2081
2082 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
2083 {
2084     widths.Empty();
2085     widths.Add(0, text.length());
2086
2087     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
2088
2089     if (text.empty())
2090         return;
2091
2092     // TODO
2093 }
2094
2095 void * wxCairoContext::GetNativeContext()
2096 {
2097     return m_context;
2098 }
2099
2100 bool wxCairoContext::SetAntialiasMode(wxAntialiasMode antialias)
2101 {
2102     if (m_antialias == antialias)
2103         return true;
2104
2105     m_antialias = antialias;
2106
2107     cairo_antialias_t antialiasMode;
2108     switch (antialias)
2109     {
2110         case wxANTIALIAS_DEFAULT:
2111             antialiasMode = CAIRO_ANTIALIAS_DEFAULT;
2112             break;
2113         case wxANTIALIAS_NONE:
2114             antialiasMode = CAIRO_ANTIALIAS_NONE;
2115             break;
2116         default:
2117             return false;
2118     }
2119     cairo_set_antialias(m_context, antialiasMode);
2120     return true;
2121 }
2122
2123 bool wxCairoContext::SetInterpolationQuality(wxInterpolationQuality WXUNUSED(interpolation))
2124 {
2125     // placeholder
2126     return false;
2127 }
2128
2129 bool wxCairoContext::SetCompositionMode(wxCompositionMode op)
2130 {
2131     if ( m_composition == op )
2132         return true;
2133
2134     m_composition = op;
2135     cairo_operator_t cop;
2136     switch (op)
2137     {
2138         case wxCOMPOSITION_CLEAR:
2139             cop = CAIRO_OPERATOR_CLEAR;
2140             break;
2141         case wxCOMPOSITION_SOURCE:
2142             cop = CAIRO_OPERATOR_SOURCE;
2143             break;
2144         case wxCOMPOSITION_OVER:
2145             cop = CAIRO_OPERATOR_OVER;
2146             break;
2147         case wxCOMPOSITION_IN:
2148             cop = CAIRO_OPERATOR_IN;
2149             break;
2150         case wxCOMPOSITION_OUT:
2151             cop = CAIRO_OPERATOR_OUT;
2152             break;
2153         case wxCOMPOSITION_ATOP:
2154             cop = CAIRO_OPERATOR_ATOP;
2155             break;
2156         case wxCOMPOSITION_DEST:
2157             cop = CAIRO_OPERATOR_DEST;
2158             break;
2159         case wxCOMPOSITION_DEST_OVER:
2160             cop = CAIRO_OPERATOR_DEST_OVER;
2161             break;
2162         case wxCOMPOSITION_DEST_IN:
2163             cop = CAIRO_OPERATOR_DEST_IN;
2164             break;
2165         case wxCOMPOSITION_DEST_OUT:
2166             cop = CAIRO_OPERATOR_DEST_OUT;
2167             break;
2168         case wxCOMPOSITION_DEST_ATOP:
2169             cop = CAIRO_OPERATOR_DEST_ATOP;
2170             break;
2171         case wxCOMPOSITION_XOR:
2172             cop = CAIRO_OPERATOR_XOR;
2173             break;
2174         case wxCOMPOSITION_ADD:
2175             cop = CAIRO_OPERATOR_ADD;
2176             break;
2177         default:
2178             return false;
2179     }
2180     cairo_set_operator(m_context, cop);
2181     return true;
2182 }
2183
2184 void wxCairoContext::BeginLayer(wxDouble opacity)
2185 {
2186     m_layerOpacities.push_back(opacity);
2187     cairo_push_group(m_context);
2188 }
2189
2190 void wxCairoContext::EndLayer()
2191 {
2192     float opacity = m_layerOpacities.back();
2193     m_layerOpacities.pop_back();
2194     cairo_pop_group_to_source(m_context);
2195     cairo_paint_with_alpha(m_context,opacity);
2196 }
2197
2198 //-----------------------------------------------------------------------------
2199 // wxCairoRenderer declaration
2200 //-----------------------------------------------------------------------------
2201
2202 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
2203 {
2204 public :
2205     wxCairoRenderer() {}
2206
2207     virtual ~wxCairoRenderer() {}
2208
2209     // Context
2210
2211     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
2212     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
2213     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
2214
2215     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
2216
2217     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
2218 #if wxUSE_IMAGE
2219     virtual wxGraphicsContext * CreateContextFromImage(wxImage& image);
2220 #endif // wxUSE_IMAGE
2221
2222     virtual wxGraphicsContext * CreateContext( wxWindow* window );
2223
2224     virtual wxGraphicsContext * CreateMeasuringContext();
2225 #ifdef __WXMSW__
2226 #if wxUSE_ENH_METAFILE
2227     virtual wxGraphicsContext * CreateContext( const wxEnhMetaFileDC& dc);
2228 #endif
2229 #endif
2230     // Path
2231
2232     virtual wxGraphicsPath CreatePath();
2233
2234     // Matrix
2235
2236     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
2237         wxDouble tx=0.0, wxDouble ty=0.0);
2238
2239
2240     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
2241
2242     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
2243
2244     virtual wxGraphicsBrush
2245     CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2246                               wxDouble x2, wxDouble y2,
2247                               const wxGraphicsGradientStops& stops);
2248
2249     virtual wxGraphicsBrush
2250     CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2251                               wxDouble xc, wxDouble yc,
2252                               wxDouble radius,
2253                               const wxGraphicsGradientStops& stops);
2254
2255     // sets the font
2256     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
2257     virtual wxGraphicsFont CreateFont(double sizeInPixels,
2258                                       const wxString& facename,
2259                                       int flags = wxFONTFLAG_DEFAULT,
2260                                       const wxColour& col = *wxBLACK);
2261
2262     // create a native bitmap representation
2263     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap );
2264 #if wxUSE_IMAGE
2265     virtual wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image);
2266     virtual wxImage CreateImageFromBitmap(const wxGraphicsBitmap& bmp);
2267 #endif // wxUSE_IMAGE
2268
2269     // create a graphics bitmap from a native bitmap
2270     virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
2271
2272     // create a subimage from a native image representation
2273     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  );
2274
2275 protected :
2276     bool EnsureIsLoaded();
2277     void Load();
2278     void Unload();
2279     friend class wxCairoModule;
2280 private :
2281     int m_loaded;
2282     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
2283 } ;
2284
2285 //-----------------------------------------------------------------------------
2286 // wxCairoRenderer implementation
2287 //-----------------------------------------------------------------------------
2288
2289 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
2290
2291 static wxCairoRenderer gs_cairoGraphicsRenderer;
2292 // temporary hack to allow creating a cairo context on any platform
2293 extern wxGraphicsRenderer* gCairoRenderer;
2294 wxGraphicsRenderer* gCairoRenderer = &gs_cairoGraphicsRenderer;
2295
2296 bool wxCairoRenderer::EnsureIsLoaded()
2297 {
2298 #ifndef __WXGTK__
2299     Load();
2300     return wxCairoInit();
2301 #else
2302     return true;
2303 #endif
2304 }
2305
2306 void wxCairoRenderer::Load()
2307 {
2308     wxCairoInit();
2309 }
2310
2311 void wxCairoRenderer::Unload()
2312 {
2313     wxCairoCleanUp();
2314 }
2315
2316 // call EnsureIsLoaded() and return returnOnFail value if it fails
2317 #define ENSURE_LOADED_OR_RETURN(returnOnFail)  \
2318     if ( !EnsureIsLoaded() )                   \
2319         return (returnOnFail)
2320
2321 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
2322 {
2323     ENSURE_LOADED_OR_RETURN(NULL);
2324     return new wxCairoContext(this,dc);
2325 }
2326
2327 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
2328 {
2329     ENSURE_LOADED_OR_RETURN(NULL);
2330     return new wxCairoContext(this,dc);
2331 }
2332
2333 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
2334 {
2335     ENSURE_LOADED_OR_RETURN(NULL);
2336     return new wxCairoContext(this, dc);
2337 }
2338
2339 #ifdef __WXMSW__
2340 #if wxUSE_ENH_METAFILE
2341 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxEnhMetaFileDC& WXUNUSED(dc) )
2342 {
2343     ENSURE_LOADED_OR_RETURN(NULL);
2344     return NULL;
2345 }
2346 #endif
2347 #endif
2348
2349 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
2350 {
2351     ENSURE_LOADED_OR_RETURN(NULL);
2352 #ifdef __WXMSW__
2353     return new wxCairoContext(this,(HDC)context);
2354 #else
2355     return new wxCairoContext(this,(cairo_t*)context);
2356 #endif
2357 }
2358
2359
2360 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
2361 {
2362     ENSURE_LOADED_OR_RETURN(NULL);
2363 #ifdef __WXGTK__
2364     return new wxCairoContext(this,(GdkDrawable*)window);
2365 #else
2366     wxUnusedVar(window);
2367     return NULL;
2368 #endif
2369 }
2370
2371 #if wxUSE_IMAGE
2372 wxGraphicsContext * wxCairoRenderer::CreateContextFromImage(wxImage& image)
2373 {
2374     return new wxCairoImageContext(this, image);
2375 }
2376 #endif // wxUSE_IMAGE
2377
2378 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
2379 {
2380     ENSURE_LOADED_OR_RETURN(NULL);
2381 #ifdef __WXGTK__
2382     return CreateContextFromNativeWindow(gdk_get_default_root_window());
2383 #endif
2384     return NULL;
2385     // TODO
2386 }
2387
2388 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
2389 {
2390     ENSURE_LOADED_OR_RETURN(NULL);
2391     return new wxCairoContext(this, window );
2392 }
2393
2394 // Path
2395
2396 wxGraphicsPath wxCairoRenderer::CreatePath()
2397 {
2398     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPath);
2399     wxGraphicsPath path;
2400     path.SetRefData( new wxCairoPathData(this) );
2401     return path;
2402 }
2403
2404
2405 // Matrix
2406
2407 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
2408                                                 wxDouble tx, wxDouble ty)
2409
2410 {
2411     ENSURE_LOADED_OR_RETURN(wxNullGraphicsMatrix);
2412     wxGraphicsMatrix m;
2413     wxCairoMatrixData* data = new wxCairoMatrixData( this );
2414     data->Set( a,b,c,d,tx,ty ) ;
2415     m.SetRefData(data);
2416     return m;
2417 }
2418
2419 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
2420 {
2421     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPen);
2422     if ( !pen.IsOk() || pen.GetStyle() == wxPENSTYLE_TRANSPARENT )
2423         return wxNullGraphicsPen;
2424     else
2425     {
2426         wxGraphicsPen p;
2427         p.SetRefData(new wxCairoPenData( this, pen ));
2428         return p;
2429     }
2430 }
2431
2432 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
2433 {
2434     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2435     if ( !brush.IsOk() || brush.GetStyle() == wxBRUSHSTYLE_TRANSPARENT )
2436         return wxNullGraphicsBrush;
2437     else
2438     {
2439         wxGraphicsBrush p;
2440         p.SetRefData(new wxCairoBrushData( this, brush ));
2441         return p;
2442     }
2443 }
2444
2445 wxGraphicsBrush
2446 wxCairoRenderer::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2447                                            wxDouble x2, wxDouble y2,
2448                                            const wxGraphicsGradientStops& stops)
2449 {
2450     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2451     wxGraphicsBrush p;
2452     wxCairoBrushData* d = new wxCairoBrushData( this );
2453     d->CreateLinearGradientBrush(x1, y1, x2, y2, stops);
2454     p.SetRefData(d);
2455     return p;
2456 }
2457
2458 wxGraphicsBrush
2459 wxCairoRenderer::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2460                                            wxDouble xc, wxDouble yc, wxDouble r,
2461                                            const wxGraphicsGradientStops& stops)
2462 {
2463     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2464     wxGraphicsBrush p;
2465     wxCairoBrushData* d = new wxCairoBrushData( this );
2466     d->CreateRadialGradientBrush(xo, yo, xc, yc, r, stops);
2467     p.SetRefData(d);
2468     return p;
2469 }
2470
2471 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
2472 {
2473     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
2474     if ( font.IsOk() )
2475     {
2476         wxGraphicsFont p;
2477         p.SetRefData(new wxCairoFontData( this , font, col ));
2478         return p;
2479     }
2480     else
2481         return wxNullGraphicsFont;
2482 }
2483
2484 wxGraphicsFont
2485 wxCairoRenderer::CreateFont(double sizeInPixels,
2486                             const wxString& facename,
2487                             int flags,
2488                             const wxColour& col)
2489 {
2490     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
2491
2492     wxGraphicsFont font;
2493     font.SetRefData(new wxCairoFontData(this, sizeInPixels, facename, flags, col));
2494     return font;
2495 }
2496
2497 wxGraphicsBitmap wxCairoRenderer::CreateBitmap( const wxBitmap& bmp )
2498 {
2499     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2500     if ( bmp.IsOk() )
2501     {
2502         wxGraphicsBitmap p;
2503         p.SetRefData(new wxCairoBitmapData( this , bmp ));
2504         return p;
2505     }
2506     else
2507         return wxNullGraphicsBitmap;
2508 }
2509
2510 #if wxUSE_IMAGE
2511
2512 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromImage(const wxImage& image)
2513 {
2514     wxGraphicsBitmap bmp;
2515
2516     ENSURE_LOADED_OR_RETURN(bmp);
2517
2518     if ( image.IsOk() )
2519     {
2520         bmp.SetRefData(new wxCairoBitmapData(this, image));
2521     }
2522
2523     return bmp;
2524 }
2525
2526 wxImage wxCairoRenderer::CreateImageFromBitmap(const wxGraphicsBitmap& bmp)
2527 {
2528     ENSURE_LOADED_OR_RETURN(wxNullImage);
2529
2530     const wxCairoBitmapData* const
2531         data = static_cast<wxCairoBitmapData*>(bmp.GetGraphicsData());
2532
2533     return data ? data->ConvertToImage() : wxNullImage;
2534 }
2535
2536 #endif // wxUSE_IMAGE
2537
2538
2539 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromNativeBitmap( void* bitmap )
2540 {
2541     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2542     if ( bitmap != NULL )
2543     {
2544         wxGraphicsBitmap p;
2545         p.SetRefData(new wxCairoBitmapData( this , (cairo_surface_t*) bitmap ));
2546         return p;
2547     }
2548     else
2549         return wxNullGraphicsBitmap;
2550 }
2551
2552 wxGraphicsBitmap
2553 wxCairoRenderer::CreateSubBitmap(const wxGraphicsBitmap& WXUNUSED(bitmap),
2554                                  wxDouble WXUNUSED(x),
2555                                  wxDouble WXUNUSED(y),
2556                                  wxDouble WXUNUSED(w),
2557                                  wxDouble WXUNUSED(h))
2558 {
2559     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2560     wxFAIL_MSG("wxCairoRenderer::CreateSubBitmap is not implemented.");
2561     return wxNullGraphicsBitmap;
2562 }
2563
2564 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2565 {
2566     return &gs_cairoGraphicsRenderer;
2567 }
2568
2569 #else // !wxUSE_CAIRO
2570
2571 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2572 {
2573     return NULL;
2574 }
2575
2576 #endif  // wxUSE_CAIRO/!wxUSE_CAIRO
2577
2578 // MSW and OS X have their own native default renderers, but the other ports
2579 // use Cairo by default
2580 #if !(defined(__WXMSW__) || defined(__WXOSX__))
2581 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
2582 {
2583     return GetCairoRenderer();
2584 }
2585 #endif // !(__WXMSW__ || __WXOSX__)
2586
2587 #endif // wxUSE_GRAPHICS_CONTEXT