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 PangoFontDescription* GetFont() const { return m_font; }
 295     bool GetUnderlined() const { return m_underlined; }
 296 #endif
 297 private :
 298     void InitColour(const wxColour& col);
 299     void InitFontComponents(const wxString& facename,
 300                             cairo_font_slant_t slant,
 301                             cairo_font_weight_t weight);
 302
 303     double m_size;
 304     double m_red;
 305     double m_green;
 306     double m_blue;
 307     double m_alpha;
 308 #ifdef __WXMAC__
 309     cairo_font_face_t *m_font;
 310 #elif defined(__WXGTK__)
 311     PangoFontDescription* m_font;
 312     bool m_underlined;
 313 #endif
 314
 315     // These members are used when the font is created from its face name and
 316     // flags (and not from wxFont) and also even when creating it from wxFont
 317     // on the platforms not covered above.
 318     //
 319     // Notice that we can't use cairo_font_face_t instead of storing those,
 320     // even though it would be simpler and need less #ifdefs, because
 321     // cairo_toy_font_face_create() that we'd need to create it is only
 322     // available in Cairo 1.8 and we require just 1.2 currently. If we do drop
 323     // support for < 1.8 versions in the future it would be definitely better
 324     // to use cairo_toy_font_face_create() instead.
 325     wxCharBuffer m_fontName;
 326     cairo_font_slant_t m_slant;
 327     cairo_font_weight_t m_weight;
 328 };
 329
 330 class wxCairoBitmapData : public wxGraphicsObjectRefData
 331 {
 332 public:
 333     wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp );
 334 #if wxUSE_IMAGE
 335     wxCairoBitmapData(wxGraphicsRenderer* renderer, const wxImage& image);
 336 #endif // wxUSE_IMAGE
 337     wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap );
 338     ~wxCairoBitmapData();
 339
 340     virtual cairo_surface_t* GetCairoSurface() { return m_surface; }
 341     virtual cairo_pattern_t* GetCairoPattern() { return m_pattern; }
 342     virtual wxSize GetSize() { return wxSize(m_width, m_height); }
 343
 344 #if wxUSE_IMAGE
 345     wxImage ConvertToImage() const;
 346 #endif // wxUSE_IMAGE
 347
 348 private :
 349     // Allocate m_buffer for the bitmap of the given size in the given format.
 350     //
 351     // Returns the stride used for the buffer.
 352     int InitBuffer(int width, int height, cairo_format_t format);
 353
 354     // Really create the surface using the buffer (which was supposed to be
 355     // filled since InitBuffer() call).
 356     void InitSurface(cairo_format_t format, int stride);
 357
 358
 359     cairo_surface_t* m_surface;
 360     cairo_pattern_t* m_pattern;
 361     int m_width;
 362     int m_height;
 363     unsigned char* m_buffer;
 364 };
 365
 366 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
 367 {
 368 public:
 369     wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc );
 370     wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc );
 371     wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc );
 372 #ifdef __WXGTK__
 373     wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable );
 374 #endif
 375 #ifdef __WXMSW__
 376     wxCairoContext( wxGraphicsRenderer* renderer, HDC context );
 377 #endif
 378     wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context );
 379     wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window);
 380
 381     // If this ctor is used, Init() must be called by the derived class later.
 382     wxCairoContext( wxGraphicsRenderer* renderer );
 383
 384     virtual ~wxCairoContext();
 385
 386     virtual bool ShouldOffset() const
 387     {
 388         if ( !m_enableOffset )
 389             return false;
 390
 391         int penwidth = 0 ;
 392         if ( !m_pen.IsNull() )
 393         {
 394             penwidth = (int)((wxCairoPenData*)m_pen.GetRefData())->GetWidth();
 395             if ( penwidth == 0 )
 396                 penwidth = 1;
 397         }
 398         return ( penwidth % 2 ) == 1;
 399     }
 400
 401     virtual void Clip( const wxRegion &region );
 402 #ifdef __WXMSW__
 403     cairo_surface_t* m_mswSurface;
 404 #endif
 405
 406     // clips drawings to the rect
 407     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 408
 409     // resets the clipping to original extent
 410     virtual void ResetClip();
 411
 412     virtual void * GetNativeContext();
 413
 414     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
 415
 416     virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation);
 417
 418     virtual bool SetCompositionMode(wxCompositionMode op);
 419
 420     virtual void BeginLayer(wxDouble opacity);
 421
 422     virtual void EndLayer();
 423
 424     virtual void StrokePath( const wxGraphicsPath& p );
 425     virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxWINDING_RULE );
 426
 427     virtual void Translate( wxDouble dx , wxDouble dy );
 428     virtual void Scale( wxDouble xScale , wxDouble yScale );
 429     virtual void Rotate( wxDouble angle );
 430
 431     // concatenates this transform with the current transform of this context
 432     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 433
 434     // sets the transform of this context
 435     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 436
 437     // gets the matrix of this context
 438     virtual wxGraphicsMatrix GetTransform() const;
 439
 440     virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 441     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 442     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 443     virtual void PushState();
 444     virtual void PopState();
 445
 446     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 447                                 wxDouble *descent, wxDouble *externalLeading ) const;
 448     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 449
 450 protected:
 451     virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
 452
 453     void Init(cairo_t *context);
 454
 455 private:
 456     cairo_t* m_context;
 457
 458     wxVector<float> m_layerOpacities;
 459
 460     wxDECLARE_NO_COPY_CLASS(wxCairoContext);
 461 };
 462
 463 #if wxUSE_IMAGE
 464 // ----------------------------------------------------------------------------
 465 // wxCairoImageContext: context associated with a wxImage.
 466 // ----------------------------------------------------------------------------
 467
 468 class wxCairoImageContext : public wxCairoContext
 469 {
 470 public:
 471     wxCairoImageContext(wxGraphicsRenderer* renderer, wxImage& image) :
 472         wxCairoContext(renderer),
 473         m_image(image),
 474         m_data(renderer, image)
 475     {
 476         Init(cairo_create(m_data.GetCairoSurface()));
 477     }
 478
 479     virtual ~wxCairoImageContext()
 480     {
 481         m_image = m_data.ConvertToImage();
 482     }
 483
 484 private:
 485     wxImage& m_image;
 486     wxCairoBitmapData m_data;
 487
 488     wxDECLARE_NO_COPY_CLASS(wxCairoImageContext);
 489 };
 490 #endif // wxUSE_IMAGE
 491
 492 //-----------------------------------------------------------------------------
 493 // wxCairoPenData implementation
 494 //-----------------------------------------------------------------------------
 495
 496 wxCairoPenData::~wxCairoPenData()
 497 {
 498     delete[] m_userLengths;
 499 }
 500
 501 void wxCairoPenData::Init()
 502 {
 503     m_lengths = NULL;
 504     m_userLengths = NULL;
 505     m_width = 0;
 506     m_count = 0;
 507 }
 508
 509 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 510 : wxGraphicsObjectRefData(renderer)
 511 {
 512     Init();
 513     m_pen = pen;
 514     m_width = m_pen.GetWidth();
 515     if (m_width <= 0.0)
 516         m_width = 0.1;
 517
 518     m_red = m_pen.GetColour().Red()/255.0;
 519     m_green = m_pen.GetColour().Green()/255.0;
 520     m_blue = m_pen.GetColour().Blue()/255.0;
 521     m_alpha = m_pen.GetColour().Alpha()/255.0;
 522
 523     switch ( m_pen.GetCap() )
 524     {
 525     case wxCAP_ROUND :
 526         m_cap = CAIRO_LINE_CAP_ROUND;
 527         break;
 528
 529     case wxCAP_PROJECTING :
 530         m_cap = CAIRO_LINE_CAP_SQUARE;
 531         break;
 532
 533     case wxCAP_BUTT :
 534         m_cap = CAIRO_LINE_CAP_BUTT;
 535         break;
 536
 537     default :
 538         m_cap = CAIRO_LINE_CAP_BUTT;
 539         break;
 540     }
 541
 542     switch ( m_pen.GetJoin() )
 543     {
 544     case wxJOIN_BEVEL :
 545         m_join = CAIRO_LINE_JOIN_BEVEL;
 546         break;
 547
 548     case wxJOIN_MITER :
 549         m_join = CAIRO_LINE_JOIN_MITER;
 550         break;
 551
 552     case wxJOIN_ROUND :
 553         m_join = CAIRO_LINE_JOIN_ROUND;
 554         break;
 555
 556     default :
 557         m_join = CAIRO_LINE_JOIN_MITER;
 558         break;
 559     }
 560
 561     const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
 562     const double dotted[] =
 563     {
 564         dashUnit , dashUnit + 2.0
 565     };
 566     static const double short_dashed[] =
 567     {
 568         9.0 , 6.0
 569     };
 570     static const double dashed[] =
 571     {
 572         19.0 , 9.0
 573     };
 574     static const double dotted_dashed[] =
 575     {
 576         9.0 , 6.0 , 3.0 , 3.0
 577     };
 578
 579     switch ( m_pen.GetStyle() )
 580     {
 581     case wxPENSTYLE_SOLID :
 582         break;
 583
 584     case wxPENSTYLE_DOT :
 585         m_count = WXSIZEOF(dotted);
 586         m_userLengths = new double[ m_count ] ;
 587         memcpy( m_userLengths, dotted, sizeof(dotted) );
 588         m_lengths = m_userLengths;
 589         break;
 590
 591     case wxPENSTYLE_LONG_DASH :
 592         m_lengths = dashed ;
 593         m_count = WXSIZEOF(dashed);
 594         break;
 595
 596     case wxPENSTYLE_SHORT_DASH :
 597         m_lengths = short_dashed ;
 598         m_count = WXSIZEOF(short_dashed);
 599         break;
 600
 601     case wxPENSTYLE_DOT_DASH :
 602         m_lengths = dotted_dashed ;
 603         m_count = WXSIZEOF(dotted_dashed);
 604         break;
 605
 606     case wxPENSTYLE_USER_DASH :
 607         {
 608             wxDash *wxdashes ;
 609             m_count = m_pen.GetDashes( &wxdashes ) ;
 610             if ((wxdashes != NULL) && (m_count > 0))
 611             {
 612                 m_userLengths = new double[m_count] ;
 613                 for ( int i = 0 ; i < m_count ; ++i )
 614                 {
 615                     m_userLengths[i] = wxdashes[i] * dashUnit ;
 616
 617                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 618                         m_userLengths[i] = dashUnit + 2.0 ;
 619                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 620                         m_userLengths[i] = dashUnit ;
 621                 }
 622             }
 623             m_lengths = m_userLengths ;
 624         }
 625         break;
 626     case wxPENSTYLE_STIPPLE :
 627         {
 628             /*
 629             wxBitmap* bmp = pen.GetStipple();
 630             if ( bmp && bmp->IsOk() )
 631             {
 632             wxDELETE( m_penImage );
 633             wxDELETE( m_penBrush );
 634             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 635             m_penBrush = new TextureBrush(m_penImage);
 636             m_pen->SetBrush( m_penBrush );
 637             }
 638             */
 639         }
 640         break;
 641     default :
 642         if ( m_pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH
 643             && m_pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
 644         {
 645             /*
 646             wxDELETE( m_penBrush );
 647             HatchStyle style = HatchStyleHorizontal;
 648             switch( pen.GetStyle() )
 649             {
 650             case wxPENSTYLE_BDIAGONAL_HATCH :
 651             style = HatchStyleBackwardDiagonal;
 652             break ;
 653             case wxPENSTYLE_CROSSDIAG_HATCH :
 654             style = HatchStyleDiagonalCross;
 655             break ;
 656             case wxPENSTYLE_FDIAGONAL_HATCH :
 657             style = HatchStyleForwardDiagonal;
 658             break ;
 659             case wxPENSTYLE_CROSS_HATCH :
 660             style = HatchStyleCross;
 661             break ;
 662             case wxPENSTYLE_HORIZONTAL_HATCH :
 663             style = HatchStyleHorizontal;
 664             break ;
 665             case wxPENSTYLE_VERTICAL_HATCH :
 666             style = HatchStyleVertical;
 667             break ;
 668
 669             }
 670             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 671             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 672             m_pen->SetBrush( m_penBrush )
 673             */
 674         }
 675         break;
 676     }
 677 }
 678
 679 void wxCairoPenData::Apply( wxGraphicsContext* context )
 680 {
 681     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 682     cairo_set_line_width(ctext,m_width);
 683     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 684     cairo_set_line_cap(ctext,m_cap);
 685     cairo_set_line_join(ctext,m_join);
 686     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 687 }
 688
 689 //-----------------------------------------------------------------------------
 690 // wxCairoBrushData implementation
 691 //-----------------------------------------------------------------------------
 692
 693 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 694   : wxGraphicsObjectRefData( renderer )
 695 {
 696     Init();
 697 }
 698
 699 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
 700   : wxGraphicsObjectRefData(renderer)
 701 {
 702     Init();
 703
 704     m_red = brush.GetColour().Red()/255.0;
 705     m_green = brush.GetColour().Green()/255.0;
 706     m_blue = brush.GetColour().Blue()/255.0;
 707     m_alpha = brush.GetColour().Alpha()/255.0;
 708     /*
 709     if ( brush.GetStyle() == wxBRUSHSTYLE_SOLID)
 710     {
 711     m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 712     brush.GetColour().Green() , brush.GetColour().Blue() ) );
 713     }
 714     else if ( brush.IsHatch() )
 715     {
 716     HatchStyle style = HatchStyleHorizontal;
 717     switch( brush.GetStyle() )
 718     {
 719     case wxBRUSHSTYLE_BDIAGONAL_HATCH :
 720     style = HatchStyleBackwardDiagonal;
 721     break ;
 722     case wxBRUSHSTYLE_CROSSDIAG_HATCH :
 723     style = HatchStyleDiagonalCross;
 724     break ;
 725     case wxBRUSHSTYLE_FDIAGONAL_HATCH :
 726     style = HatchStyleForwardDiagonal;
 727     break ;
 728     case wxBRUSHSTYLE_CROSS_HATCH :
 729     style = HatchStyleCross;
 730     break ;
 731     case wxBRUSHSTYLE_HORIZONTAL_HATCH :
 732     style = HatchStyleHorizontal;
 733     break ;
 734     case wxBRUSHSTYLE_VERTICAL_HATCH :
 735     style = HatchStyleVertical;
 736     break ;
 737
 738     }
 739     m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 740     brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 741     }
 742     else
 743     {
 744     wxBitmap* bmp = brush.GetStipple();
 745     if ( bmp && bmp->IsOk() )
 746     {
 747     wxDELETE( m_brushImage );
 748     m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 749     m_brush = new TextureBrush(m_brushImage);
 750     }
 751     }
 752     */
 753 }
 754
 755 wxCairoBrushData::~wxCairoBrushData ()
 756 {
 757     if (m_brushPattern)
 758         cairo_pattern_destroy(m_brushPattern);
 759 }
 760
 761 void wxCairoBrushData::Apply( wxGraphicsContext* context )
 762 {
 763     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 764     if ( m_brushPattern )
 765     {
 766         cairo_set_source(ctext,m_brushPattern);
 767     }
 768     else
 769     {
 770         cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 771     }
 772 }
 773
 774 void wxCairoBrushData::AddGradientStops(const wxGraphicsGradientStops& stops)
 775 {
 776     // loop over all the stops, they include the beginning and ending ones
 777     const unsigned numStops = stops.GetCount();
 778     for ( unsigned n = 0; n < numStops; n++ )
 779     {
 780         const wxGraphicsGradientStop stop = stops.Item(n);
 781
 782         const wxColour col = stop.GetColour();
 783
 784         cairo_pattern_add_color_stop_rgba
 785         (
 786             m_brushPattern,
 787             stop.GetPosition(),
 788             col.Red()/255.0,
 789             col.Green()/255.0,
 790             col.Blue()/255.0,
 791             col.Alpha()/255.0
 792         );
 793     }
 794
 795     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS,
 796                  wxT("Couldn't create cairo pattern"));
 797 }
 798
 799 void
 800 wxCairoBrushData::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 801                                             wxDouble x2, wxDouble y2,
 802                                             const wxGraphicsGradientStops& stops)
 803 {
 804     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 805
 806     AddGradientStops(stops);
 807 }
 808
 809 void
 810 wxCairoBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 811                                             wxDouble xc, wxDouble yc,
 812                                             wxDouble radius,
 813                                             const wxGraphicsGradientStops& stops)
 814 {
 815     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 816
 817     AddGradientStops(stops);
 818 }
 819
 820 void wxCairoBrushData::Init()
 821 {
 822     m_brushPattern = NULL;
 823 }
 824
 825 //-----------------------------------------------------------------------------
 826 // wxCairoFontData implementation
 827 //-----------------------------------------------------------------------------
 828
 829 void wxCairoFontData::InitColour(const wxColour& col)
 830 {
 831     m_red = col.Red()/255.0;
 832     m_green = col.Green()/255.0;
 833     m_blue = col.Blue()/255.0;
 834     m_alpha = col.Alpha()/255.0;
 835 }
 836
 837 void
 838 wxCairoFontData::InitFontComponents(const wxString& facename,
 839                                     cairo_font_slant_t slant,
 840                                     cairo_font_weight_t weight)
 841 {
 842     m_fontName = facename.mb_str(wxConvUTF8);
 843     m_slant = slant;
 844     m_weight = weight;
 845 }
 846
 847 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 848                          const wxColour& col ) : wxGraphicsObjectRefData(renderer)
 849 {
 850     InitColour(col);
 851
 852     m_size = font.GetPointSize();
 853
 854 #ifdef __WXMAC__
 855     m_font = cairo_quartz_font_face_create_for_cgfont( font.OSXGetCGFont() );
 856 #elif defined(__WXGTK__)
 857     m_font = pango_font_description_copy( font.GetNativeFontInfo()->description );
 858     m_underlined = font.GetUnderlined();
 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(__WXGTK__) || 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 #elif defined(__WXGTK__)
 908     if ( m_font )
 909         pango_font_description_free( m_font );
 910 #else
 911 #endif
 912 }
 913
 914 bool wxCairoFontData::Apply( wxGraphicsContext* context )
 915 {
 916     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 917     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 918 #ifdef __WXGTK__
 919     if ( m_font )
 920     {
 921         // Nothing to do, the caller uses Pango layout functions to do
 922         // everything.
 923         return true;
 924     }
 925 #elif defined(__WXMAC__)
 926     if ( m_font )
 927     {
 928         cairo_set_font_face(ctext, m_font);
 929         cairo_set_font_size(ctext, m_size );
 930         return true;
 931     }
 932 #endif
 933
 934     // If we get here, we must be on a platform without native font support or
 935     // we're using toy Cairo API even under wxGTK/wxMac.
 936     cairo_select_font_face(ctext, m_fontName, m_slant, m_weight );
 937     cairo_set_font_size(ctext, m_size );
 938
 939     // Indicate that we don't use native fonts for the platforms which care
 940     // about this (currently only wxGTK).
 941     return false;
 942 }
 943
 944 //-----------------------------------------------------------------------------
 945 // wxCairoPathData implementation
 946 //-----------------------------------------------------------------------------
 947
 948 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
 949     : wxGraphicsPathData(renderer)
 950 {
 951     if (pathcontext)
 952     {
 953         m_pathContext = pathcontext;
 954     }
 955     else
 956     {
 957         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 958         m_pathContext = cairo_create(surface);
 959         cairo_surface_destroy (surface);
 960     }
 961 }
 962
 963 wxCairoPathData::~wxCairoPathData()
 964 {
 965     cairo_destroy(m_pathContext);
 966 }
 967
 968 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
 969 {
 970     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 971     cairo_t* pathcontext = cairo_create(surface);
 972     cairo_surface_destroy (surface);
 973
 974     cairo_path_t* path = cairo_copy_path(m_pathContext);
 975     cairo_append_path(pathcontext, path);
 976     cairo_path_destroy(path);
 977     return new wxCairoPathData( GetRenderer() ,pathcontext);
 978 }
 979
 980
 981 void* wxCairoPathData::GetNativePath() const
 982 {
 983     return cairo_copy_path(m_pathContext) ;
 984 }
 985
 986 void wxCairoPathData::UnGetNativePath(void *p) const
 987 {
 988     cairo_path_destroy((cairo_path_t*)p);
 989 }
 990
 991 //
 992 // The Primitives
 993 //
 994
 995 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
 996 {
 997     cairo_move_to(m_pathContext,x,y);
 998 }
 999
1000 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
1001 {
1002     cairo_line_to(m_pathContext,x,y);
1003 }
1004
1005 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
1006 {
1007     cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
1008     cairo_append_path(m_pathContext, p);
1009     UnGetNativePath(p);
1010 }
1011
1012 void wxCairoPathData::CloseSubpath()
1013 {
1014     cairo_close_path(m_pathContext);
1015 }
1016
1017 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
1018 {
1019     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
1020 }
1021
1022 // gets the last point of the current path, (0,0) if not yet set
1023 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
1024 {
1025     double dx,dy;
1026     cairo_get_current_point(m_pathContext,&dx,&dy);
1027     if (x)
1028         *x = dx;
1029     if (y)
1030         *y = dy;
1031 }
1032
1033 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
1034 {
1035     // as clockwise means positive in our system (y pointing downwards)
1036     // TODO make this interpretation dependent of the
1037     // real device trans
1038     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
1039         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
1040     else
1041         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
1042 }
1043
1044 // transforms each point of this path by the matrix
1045 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
1046 {
1047     // as we don't have a true path object, we have to apply the inverse
1048     // matrix to the context
1049     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
1050     cairo_matrix_invert( &m );
1051     cairo_transform(m_pathContext,&m);
1052 }
1053
1054 // gets the bounding box enclosing all points (possibly including control points)
1055 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
1056 {
1057     double x1,y1,x2,y2;
1058
1059     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
1060     if ( x2 < x1 )
1061     {
1062         *x = x2;
1063         *w = x1-x2;
1064     }
1065     else
1066     {
1067         *x = x1;
1068         *w = x2-x1;
1069     }
1070
1071     if( y2 < y1 )
1072     {
1073         *y = y2;
1074         *h = y1-y2;
1075     }
1076     else
1077     {
1078         *y = y1;
1079         *h = y2-y1;
1080     }
1081 }
1082
1083 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle ) const
1084 {
1085     cairo_set_fill_rule(m_pathContext,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1086     return cairo_in_fill( m_pathContext, x, y) != 0;
1087 }
1088
1089 //-----------------------------------------------------------------------------
1090 // wxCairoMatrixData implementation
1091 //-----------------------------------------------------------------------------
1092
1093 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
1094     : wxGraphicsMatrixData(renderer)
1095 {
1096     if ( matrix )
1097         m_matrix = *matrix;
1098 }
1099
1100 wxCairoMatrixData::~wxCairoMatrixData()
1101 {
1102     // nothing to do
1103 }
1104
1105 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
1106 {
1107     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
1108 }
1109
1110 // concatenates the matrix
1111 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
1112 {
1113     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
1114 }
1115
1116 // sets the matrix to the respective values
1117 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1118                         wxDouble tx, wxDouble ty)
1119 {
1120     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
1121 }
1122
1123 // gets the component valuess of the matrix
1124 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
1125                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
1126 {
1127     if (a)  *a = m_matrix.xx;
1128     if (b)  *b = m_matrix.yx;
1129     if (c)  *c = m_matrix.xy;
1130     if (d)  *d = m_matrix.yy;
1131     if (tx) *tx= m_matrix.x0;
1132     if (ty) *ty= m_matrix.y0;
1133 }
1134
1135 // makes this the inverse matrix
1136 void wxCairoMatrixData::Invert()
1137 {
1138     cairo_matrix_invert( &m_matrix );
1139 }
1140
1141 // returns true if the elements of the transformation matrix are equal ?
1142 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
1143 {
1144     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
1145     return (
1146         m_matrix.xx == tm->xx &&
1147         m_matrix.yx == tm->yx &&
1148         m_matrix.xy == tm->xy &&
1149         m_matrix.yy == tm->yy &&
1150         m_matrix.x0 == tm->x0 &&
1151         m_matrix.y0 == tm->y0 ) ;
1152 }
1153
1154 // return true if this is the identity matrix
1155 bool wxCairoMatrixData::IsIdentity() const
1156 {
1157     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
1158         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
1159 }
1160
1161 //
1162 // transformation
1163 //
1164
1165 // add the translation to this matrix
1166 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
1167 {
1168     cairo_matrix_translate( &m_matrix, dx, dy) ;
1169 }
1170
1171 // add the scale to this matrix
1172 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
1173 {
1174     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
1175 }
1176
1177 // add the rotation to this matrix (radians)
1178 void wxCairoMatrixData::Rotate( wxDouble angle )
1179 {
1180     cairo_matrix_rotate( &m_matrix, angle) ;
1181 }
1182
1183 //
1184 // apply the transforms
1185 //
1186
1187 // applies that matrix to the point
1188 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
1189 {
1190     double lx = *x, ly = *y ;
1191     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
1192     *x = lx;
1193     *y = ly;
1194 }
1195
1196 // applies the matrix except for translations
1197 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1198 {
1199     double lx = *dx, ly = *dy ;
1200     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1201     *dx = lx;
1202     *dy = ly;
1203 }
1204
1205 // returns the native representation
1206 void * wxCairoMatrixData::GetNativeMatrix() const
1207 {
1208     return (void*) &m_matrix;
1209 }
1210
1211 // ----------------------------------------------------------------------------
1212 // wxCairoBitmap implementation
1213 // ----------------------------------------------------------------------------
1214
1215 int wxCairoBitmapData::InitBuffer(int width, int height, cairo_format_t format)
1216 {
1217     wxUnusedVar(format); // Only really unused with Cairo < 1.6.
1218
1219     // Determine the stride: use cairo_format_stride_for_width() if available
1220     // but fall back to 4*width for the earlier versions as this is what that
1221     // function always returns, even in latest Cairo, anyhow.
1222     int stride;
1223 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 6, 0)
1224     if ( cairo_version() >= CAIRO_VERSION_ENCODE(1, 6, 0) )
1225     {
1226         stride = cairo_format_stride_for_width(format, width);
1227
1228         // All our code would totally break if stride were not a multiple of 4
1229         // so ensure this is the case.
1230         if ( stride % 4 )
1231         {
1232             wxFAIL_MSG("Unexpected Cairo image surface stride.");
1233
1234             stride += 4 - stride % 4;
1235         }
1236     }
1237     else
1238 #endif
1239         stride = 4*width;
1240
1241     m_width = width;
1242     m_height = height;
1243     m_buffer = new unsigned char[height*stride];
1244
1245     return stride;
1246 }
1247
1248 void wxCairoBitmapData::InitSurface(cairo_format_t format, int stride)
1249 {
1250     m_surface = cairo_image_surface_create_for_data(
1251                             m_buffer, format, m_width, m_height, stride);
1252     m_pattern = cairo_pattern_create_for_surface(m_surface);
1253 }
1254
1255 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap ) :
1256     wxGraphicsObjectRefData( renderer )
1257 {
1258     m_surface = bitmap;
1259     m_pattern = cairo_pattern_create_for_surface(m_surface);
1260 }
1261
1262 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp ) : wxGraphicsObjectRefData( renderer )
1263 {
1264     wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1265
1266 #ifdef wxHAS_RAW_BITMAP
1267     // Create a surface object and copy the bitmap pixel data to it.  if the
1268     // image has alpha (or a mask represented as alpha) then we'll use a
1269     // different format and iterator than if it doesn't...
1270     cairo_format_t bufferFormat = bmp.GetDepth() == 32
1271 #ifdef __WXGTK__
1272                                             || bmp.GetMask()
1273 #endif
1274                                         ? CAIRO_FORMAT_ARGB32
1275                                         : CAIRO_FORMAT_RGB24;
1276
1277     int stride = InitBuffer(bmp.GetWidth(), bmp.GetHeight(), bufferFormat);
1278
1279     wxBitmap bmpSource = bmp;  // we need a non-const instance
1280     wxUint32* data = (wxUint32*)m_buffer;
1281
1282     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1283     {
1284         // use the bitmap's alpha
1285         wxAlphaPixelData
1286             pixData(bmpSource, wxPoint(0, 0), wxSize(m_width, m_height));
1287         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1288
1289         wxAlphaPixelData::Iterator p(pixData);
1290         for (int y=0; y<m_height; y++)
1291         {
1292             wxAlphaPixelData::Iterator rowStart = p;
1293             wxUint32* const rowStartDst = data;
1294             for (int x=0; x<m_width; x++)
1295             {
1296                 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1297                 // with alpha in the upper 8 bits, then red, then green, then
1298                 // blue. The 32-bit quantities are stored native-endian.
1299                 // Pre-multiplied alpha is used.
1300                 unsigned char alpha = p.Alpha();
1301                 if (alpha == 0)
1302                     *data = 0;
1303                 else
1304                     *data = ( alpha                      << 24
1305                               | (p.Red() * alpha/255)    << 16
1306                               | (p.Green() * alpha/255)  <<  8
1307                               | (p.Blue() * alpha/255) );
1308                 ++data;
1309                 ++p;
1310             }
1311
1312             data = rowStartDst + stride / 4;
1313             p = rowStart;
1314             p.OffsetY(pixData, 1);
1315         }
1316     }
1317     else  // no alpha
1318     {
1319         wxNativePixelData
1320             pixData(bmpSource, wxPoint(0, 0), wxSize(m_width, m_height));
1321         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1322
1323         wxNativePixelData::Iterator p(pixData);
1324         for (int y=0; y<m_height; y++)
1325         {
1326             wxNativePixelData::Iterator rowStart = p;
1327             wxUint32* const rowStartDst = data;
1328             for (int x=0; x<m_width; x++)
1329             {
1330                 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1331                 // the upper 8 bits unused. Red, Green, and Blue are stored in
1332                 // the remaining 24 bits in that order.  The 32-bit quantities
1333                 // are stored native-endian.
1334                 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1335                 ++data;
1336                 ++p;
1337             }
1338
1339             data = rowStartDst + stride / 4;
1340             p = rowStart;
1341             p.OffsetY(pixData, 1);
1342         }
1343     }
1344 #ifdef __WXMSW__
1345     // if there is a mask, set the alpha bytes in the target buffer to
1346     // fully transparent or fully opaque
1347     if (bmpSource.GetMask())
1348     {
1349         wxBitmap bmpMask = bmpSource.GetMaskBitmap();
1350         bufferFormat = CAIRO_FORMAT_ARGB32;
1351         data = (wxUint32*)m_buffer;
1352         wxNativePixelData
1353             pixData(bmpMask, wxPoint(0, 0), wxSize(m_width, m_height));
1354         wxCHECK_RET( pixData, wxT("Failed to gain raw access to mask data."));
1355
1356         wxNativePixelData::Iterator p(pixData);
1357         for (int y=0; y<m_height; y++)
1358         {
1359             wxNativePixelData::Iterator rowStart = p;
1360             wxUint32* const rowStartDst = data;
1361             for (int x=0; x<m_width; x++)
1362             {
1363                 if (p.Red()+p.Green()+p.Blue() == 0)
1364                     *data = 0;
1365                 else
1366                     *data = (wxALPHA_OPAQUE << 24) | (*data & 0x00FFFFFF);
1367                 ++data;
1368                 ++p;
1369             }
1370
1371             data = rowStartDst + stride / 4;
1372             p = rowStart;
1373             p.OffsetY(pixData, 1);
1374         }
1375     }
1376 #endif
1377
1378     InitSurface(bufferFormat, stride);
1379 #endif // wxHAS_RAW_BITMAP
1380 }
1381
1382 #if wxUSE_IMAGE
1383
1384 // Helper functions for dealing with alpha pre-multiplication.
1385 namespace
1386 {
1387
1388 inline unsigned char Premultiply(unsigned char alpha, unsigned char data)
1389 {
1390     return alpha ? (data * alpha)/0xff : data;
1391 }
1392
1393 inline unsigned char Unpremultiply(unsigned char alpha, unsigned char data)
1394 {
1395     return alpha ? (data * 0xff)/alpha : data;
1396 }
1397
1398 } // anonymous namespace
1399
1400 wxCairoBitmapData::wxCairoBitmapData(wxGraphicsRenderer* renderer,
1401                                      const wxImage& image)
1402     : wxGraphicsObjectRefData(renderer)
1403 {
1404     const cairo_format_t bufferFormat = image.HasAlpha()
1405                                             ? CAIRO_FORMAT_ARGB32
1406                                             : CAIRO_FORMAT_RGB24;
1407
1408     int stride = InitBuffer(image.GetWidth(), image.GetHeight(), bufferFormat);
1409
1410     // Copy wxImage data into the buffer. Notice that we work with wxUint32
1411     // values and not bytes becase Cairo always works with buffers in native
1412     // endianness.
1413     wxUint32* dst = reinterpret_cast<wxUint32*>(m_buffer);
1414     const unsigned char* src = image.GetData();
1415
1416     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1417     {
1418         const unsigned char* alpha = image.GetAlpha();
1419
1420         for ( int y = 0; y < m_height; y++ )
1421         {
1422             wxUint32* const rowStartDst = dst;
1423
1424             for ( int x = 0; x < m_width; x++ )
1425             {
1426                 const unsigned char a = *alpha++;
1427
1428                 *dst++ = a                      << 24 |
1429                          Premultiply(a, src[0]) << 16 |
1430                          Premultiply(a, src[1]) <<  8 |
1431                          Premultiply(a, src[2]);
1432                 src += 3;
1433             }
1434
1435             dst = rowStartDst + stride / 4;
1436         }
1437     }
1438     else // RGB
1439     {
1440         for ( int y = 0; y < m_height; y++ )
1441         {
1442             wxUint32* const rowStartDst = dst;
1443
1444             for ( int x = 0; x < m_width; x++ )
1445             {
1446                 *dst++ = src[0] << 16 |
1447                          src[1] <<  8 |
1448                          src[2];
1449                 src += 3;
1450             }
1451
1452             dst = rowStartDst + stride / 4;
1453         }
1454     }
1455
1456     InitSurface(bufferFormat, stride);
1457 }
1458
1459 wxImage wxCairoBitmapData::ConvertToImage() const
1460 {
1461     wxImage image(m_width, m_height, false /* don't clear */);
1462
1463     // Get the surface type and format.
1464     wxCHECK_MSG( cairo_surface_get_type(m_surface) == CAIRO_SURFACE_TYPE_IMAGE,
1465                  wxNullImage,
1466                  wxS("Can't convert non-image surface to image.") );
1467
1468     switch ( cairo_image_surface_get_format(m_surface) )
1469     {
1470         case CAIRO_FORMAT_ARGB32:
1471             image.SetAlpha();
1472             break;
1473
1474         case CAIRO_FORMAT_RGB24:
1475             // Nothing to do, we don't use alpha by default.
1476             break;
1477
1478         case CAIRO_FORMAT_A8:
1479         case CAIRO_FORMAT_A1:
1480             wxFAIL_MSG(wxS("Unsupported Cairo image surface type."));
1481             return wxNullImage;
1482
1483         default:
1484             wxFAIL_MSG(wxS("Unknown Cairo image surface type."));
1485             return wxNullImage;
1486     }
1487
1488     // Prepare for copying data.
1489     const wxUint32* src = (wxUint32*)cairo_image_surface_get_data(m_surface);
1490     wxCHECK_MSG( src, wxNullImage, wxS("Failed to get Cairo surface data.") );
1491
1492     int stride = cairo_image_surface_get_stride(m_surface);
1493     wxCHECK_MSG( stride > 0, wxNullImage,
1494                  wxS("Failed to get Cairo surface stride.") );
1495
1496     // As we work with wxUint32 pointers and not char ones, we need to adjust
1497     // the stride accordingly. This should be lossless as the stride must be a
1498     // multiple of pixel size.
1499     wxASSERT_MSG( !(stride % sizeof(wxUint32)), wxS("Unexpected stride.") );
1500     stride /= sizeof(wxUint32);
1501
1502     unsigned char* dst = image.GetData();
1503     unsigned char *alpha = image.GetAlpha();
1504     if ( alpha )
1505     {
1506         // We need to also copy alpha and undo the pre-multiplication as Cairo
1507         // stores pre-multiplied values in this format while wxImage does not.
1508         for ( int y = 0; y < m_height; y++ )
1509         {
1510             const wxUint32* const rowStart = src;
1511             for ( int x = 0; x < m_width; x++ )
1512             {
1513                 const wxUint32 argb = *src++;
1514
1515                 *alpha++ = (argb & 0xff000000) >> 24;
1516
1517                 // Copy the RGB data undoing the pre-multiplication.
1518                 *dst++ = Unpremultiply(*alpha, (argb & 0x00ff0000) >> 16);
1519                 *dst++ = Unpremultiply(*alpha, (argb & 0x0000ff00) >>  8);
1520                 *dst++ = Unpremultiply(*alpha, (argb & 0x000000ff));
1521             }
1522
1523             src = rowStart + stride;
1524         }
1525     }
1526     else // RGB
1527     {
1528         // Things are pretty simple in this case, just copy RGB bytes.
1529         for ( int y = 0; y < m_height; y++ )
1530         {
1531             const wxUint32* const rowStart = src;
1532             for ( int x = 0; x < m_width; x++ )
1533             {
1534                 const wxUint32 argb = *src++;
1535
1536                 *dst++ = (argb & 0x00ff0000) >> 16;
1537                 *dst++ = (argb & 0x0000ff00) >>  8;
1538                 *dst++ = (argb & 0x000000ff);
1539             }
1540
1541             src = rowStart + stride;
1542         }
1543     }
1544
1545     return image;
1546 }
1547
1548 #endif // wxUSE_IMAGE
1549
1550 wxCairoBitmapData::~wxCairoBitmapData()
1551 {
1552     if (m_pattern)
1553         cairo_pattern_destroy(m_pattern);
1554
1555     if (m_surface)
1556         cairo_surface_destroy(m_surface);
1557
1558     delete [] m_buffer;
1559 }
1560
1561 //-----------------------------------------------------------------------------
1562 // wxCairoContext implementation
1563 //-----------------------------------------------------------------------------
1564
1565 class wxCairoOffsetHelper
1566 {
1567 public :
1568     wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1569     {
1570         m_ctx = ctx;
1571         m_offset = offset;
1572         if ( m_offset )
1573              cairo_translate( m_ctx, 0.5, 0.5 );
1574     }
1575     ~wxCairoOffsetHelper( )
1576     {
1577         if ( m_offset )
1578             cairo_translate( m_ctx, -0.5, -0.5 );
1579     }
1580 public :
1581     cairo_t* m_ctx;
1582     bool m_offset;
1583 } ;
1584
1585 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1586 : wxGraphicsContext(renderer)
1587 {
1588 #ifdef __WXMSW__
1589     // wxMSW contexts always use MM_ANISOTROPIC, which messes up
1590     // text rendering when printing using Cairo. Switch it to MM_TEXT
1591     // map mode to avoid this problem.
1592     HDC hdc = (HDC)dc.GetHDC();
1593     ::SetMapMode(hdc, MM_TEXT);
1594     m_mswSurface = cairo_win32_printing_surface_create(hdc);
1595     Init( cairo_create(m_mswSurface) );
1596 #endif
1597
1598 #ifdef __WXGTK20__
1599     const wxDCImpl *impl = dc.GetImpl();
1600     Init( (cairo_t*) impl->GetCairoContext() );
1601 #endif
1602     wxSize sz = dc.GetSize();
1603     m_width = sz.x;
1604     m_height = sz.y;
1605
1606     wxPoint org = dc.GetDeviceOrigin();
1607     cairo_translate( m_context, org.x, org.y );
1608
1609     double sx,sy;
1610     dc.GetUserScale( &sx, &sy );
1611
1612 // TODO: Determine if these fixes are needed on other platforms too.
1613 // On MSW, without this the printer context will not respect wxDC SetMapMode calls.
1614 // For example, using dc.SetMapMode(wxMM_POINTS) can let us share printer and screen
1615 // drawing code
1616 #ifdef __WXMSW__
1617     double lsx,lsy;
1618     dc.GetLogicalScale( &lsx, &lsy );
1619     sx *= lsx;
1620     sy *= lsy;
1621 #endif
1622     cairo_scale( m_context, sx, sy );
1623
1624     org = dc.GetLogicalOrigin();
1625     cairo_translate( m_context, -org.x, -org.y );
1626 }
1627
1628 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1629 : wxGraphicsContext(renderer)
1630 {
1631     int width, height;
1632     dc.GetSize( &width, &height );
1633     m_width = width;
1634     m_height = height;
1635
1636     m_enableOffset = true;
1637
1638 #ifdef __WXMSW__
1639     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1640     Init( cairo_create(m_mswSurface) );
1641 #endif
1642
1643 #ifdef __WXGTK20__
1644     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1645     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1646
1647 #if 0
1648     wxGraphicsMatrix matrix = CreateMatrix();
1649
1650     wxPoint org = dc.GetDeviceOrigin();
1651     matrix.Translate( org.x, org.y );
1652
1653     org = dc.GetLogicalOrigin();
1654     matrix.Translate( -org.x, -org.y );
1655
1656     double sx,sy;
1657     dc.GetUserScale( &sx, &sy );
1658     matrix.Scale( sx, sy );
1659
1660     ConcatTransform( matrix );
1661 #endif
1662 #endif
1663
1664 #ifdef __WXMAC__
1665     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1666     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1667     Init( cairo_create( surface ) );
1668     cairo_surface_destroy( surface );
1669 #endif
1670 }
1671
1672 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1673 : wxGraphicsContext(renderer)
1674 {
1675     int width, height;
1676     dc.GetSize( &width, &height );
1677     m_width = width;
1678     m_height = height;
1679
1680     m_enableOffset = true;
1681
1682 #ifdef __WXMSW__
1683     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1684     Init( cairo_create(m_mswSurface) );
1685 #endif
1686
1687 #ifdef __WXGTK20__
1688     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1689     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1690
1691 #if 0
1692     wxGraphicsMatrix matrix = CreateMatrix();
1693
1694     wxPoint org = dc.GetDeviceOrigin();
1695     matrix.Translate( org.x, org.y );
1696
1697     org = dc.GetLogicalOrigin();
1698     matrix.Translate( -org.x, -org.y );
1699
1700     double sx,sy;
1701     dc.GetUserScale( &sx, &sy );
1702     matrix.Scale( sx, sy );
1703
1704     ConcatTransform( matrix );
1705 #endif
1706 #endif
1707
1708 #ifdef __WXMAC__
1709     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1710     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1711     Init( cairo_create( surface ) );
1712     cairo_surface_destroy( surface );
1713 #endif
1714 }
1715
1716 #ifdef __WXGTK20__
1717 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
1718 : wxGraphicsContext(renderer)
1719 {
1720     Init( gdk_cairo_create( drawable ) );
1721
1722     int width, height;
1723     gdk_drawable_get_size( drawable, &width, &height );
1724     m_width = width;
1725     m_height = height;
1726 }
1727 #endif
1728
1729 #ifdef __WXMSW__
1730 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, HDC handle )
1731 : wxGraphicsContext(renderer)
1732 {
1733     m_mswSurface = cairo_win32_surface_create(handle);
1734     Init( cairo_create(m_mswSurface) );
1735     m_width =
1736     m_height = 0;
1737 }
1738 #endif
1739
1740
1741 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1742 : wxGraphicsContext(renderer)
1743 {
1744     Init( context );
1745     m_width =
1746     m_height = 0;
1747 }
1748
1749 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1750 : wxGraphicsContext(renderer)
1751 {
1752     m_enableOffset = true;
1753 #ifdef __WXGTK__
1754     // something along these lines (copied from dcclient)
1755
1756     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1757     // code should still be able to create wxClientDCs for them, so we will
1758     // use the parent window here then.
1759     if (window->m_wxwindow == NULL)
1760     {
1761         window = window->GetParent();
1762     }
1763
1764     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1765
1766     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1767
1768     wxSize sz = window->GetSize();
1769     m_width = sz.x;
1770     m_height = sz.y;
1771 #endif
1772
1773 #ifdef __WXMSW__
1774     m_mswSurface = cairo_win32_surface_create((HDC)window->GetHandle());
1775     Init(cairo_create(m_mswSurface));
1776 #endif
1777
1778 }
1779
1780 wxCairoContext::wxCairoContext(wxGraphicsRenderer* renderer) :
1781     wxGraphicsContext(renderer)
1782 {
1783     m_context = NULL;
1784 }
1785
1786 wxCairoContext::~wxCairoContext()
1787 {
1788     if ( m_context )
1789     {
1790         PopState();
1791         PopState();
1792         cairo_destroy(m_context);
1793     }
1794 #ifdef __WXMSW__
1795     if ( m_mswSurface )
1796         cairo_surface_destroy(m_mswSurface);
1797 #endif
1798 }
1799
1800 void wxCairoContext::Init(cairo_t *context)
1801 {
1802     m_context = context ;
1803     PushState();
1804     PushState();
1805 }
1806
1807
1808 void wxCairoContext::Clip( const wxRegion& region )
1809 {
1810     // Create a path with all the rectangles in the region
1811     wxGraphicsPath path = GetRenderer()->CreatePath();
1812     wxRegionIterator ri(region);
1813     while (ri)
1814     {
1815         path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1816         ++ri;
1817     }
1818
1819     // Put it in the context
1820     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1821     cairo_append_path(m_context, cp);
1822
1823     // clip to that path
1824     cairo_clip(m_context);
1825     path.UnGetNativePath(cp);
1826 }
1827
1828 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1829 {
1830     // Create a path with this rectangle
1831     wxGraphicsPath path = GetRenderer()->CreatePath();
1832     path.AddRectangle(x,y,w,h);
1833
1834     // Put it in the context
1835     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1836     cairo_append_path(m_context, cp);
1837
1838     // clip to that path
1839     cairo_clip(m_context);
1840     path.UnGetNativePath(cp);
1841 }
1842
1843 void wxCairoContext::ResetClip()
1844 {
1845     cairo_reset_clip(m_context);
1846 }
1847
1848
1849 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1850 {
1851     if ( !m_pen.IsNull() )
1852     {
1853         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1854         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1855         cairo_append_path(m_context,cp);
1856         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1857         cairo_stroke(m_context);
1858         path.UnGetNativePath(cp);
1859     }
1860 }
1861
1862 void wxCairoContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1863 {
1864     if ( !m_brush.IsNull() )
1865     {
1866         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1867         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1868         cairo_append_path(m_context,cp);
1869         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1870         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1871         cairo_fill(m_context);
1872         path.UnGetNativePath(cp);
1873     }
1874 }
1875
1876 void wxCairoContext::Rotate( wxDouble angle )
1877 {
1878     cairo_rotate(m_context,angle);
1879 }
1880
1881 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1882 {
1883     cairo_translate(m_context,dx,dy);
1884 }
1885
1886 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1887 {
1888     cairo_scale(m_context,xScale,yScale);
1889 }
1890
1891 // concatenates this transform with the current transform of this context
1892 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1893 {
1894     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1895 }
1896
1897 // sets the transform of this context
1898 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1899 {
1900     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1901 }
1902
1903 // gets the matrix of this context
1904 wxGraphicsMatrix wxCairoContext::GetTransform() const
1905 {
1906     wxGraphicsMatrix matrix = CreateMatrix();
1907     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1908     return matrix;
1909 }
1910
1911
1912
1913 void wxCairoContext::PushState()
1914 {
1915     cairo_save(m_context);
1916 }
1917
1918 void wxCairoContext::PopState()
1919 {
1920     cairo_restore(m_context);
1921 }
1922
1923 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1924 {
1925     wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp);
1926     DrawBitmap(bitmap, x, y, w, h);
1927
1928 }
1929
1930 void wxCairoContext::DrawBitmap(const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1931 {
1932     PushState();
1933
1934     // In case we're scaling the image by using a width and height different
1935     // than the bitmap's size create a pattern transformation on the surface and
1936     // draw the transformed pattern.
1937     wxCairoBitmapData* data = static_cast<wxCairoBitmapData*>(bmp.GetRefData());
1938     cairo_pattern_t* pattern = data->GetCairoPattern();
1939     wxSize size = data->GetSize();
1940
1941     wxDouble scaleX = w / size.GetWidth();
1942     wxDouble scaleY = h / size.GetHeight();
1943
1944     // prepare to draw the image
1945     cairo_translate(m_context, x, y);
1946     cairo_scale(m_context, scaleX, scaleY);
1947     cairo_set_source(m_context, pattern);
1948     // use the original size here since the context is scaled already...
1949     cairo_rectangle(m_context, 0, 0, size.GetWidth(), size.GetHeight());
1950     // fill the rectangle using the pattern
1951     cairo_fill(m_context);
1952
1953     PopState();
1954 }
1955
1956 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1957 {
1958     // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
1959     // start using the Cairo backend on other platforms then we may need to
1960     // fiddle with this...
1961     DrawBitmap(icon, x, y, w, h);
1962 }
1963
1964
1965 void wxCairoContext::DoDrawText(const wxString& str, wxDouble x, wxDouble y)
1966 {
1967     wxCHECK_RET( !m_font.IsNull(),
1968                  wxT("wxCairoContext::DrawText - no valid font set") );
1969
1970     if ( str.empty())
1971         return;
1972
1973     const wxCharBuffer data = str.utf8_str();
1974     if ( !data )
1975         return;
1976
1977     if ( ((wxCairoFontData*)m_font.GetRefData())->Apply(this) )
1978     {
1979 #ifdef __WXGTK__
1980         size_t datalen = strlen(data);
1981
1982         PangoLayout *layout = pango_cairo_create_layout (m_context);
1983         wxCairoFontData* font_data = (wxCairoFontData*) m_font.GetRefData();
1984         pango_layout_set_font_description( layout, font_data->GetFont());
1985         pango_layout_set_text(layout, data, datalen);
1986
1987         if (font_data->GetUnderlined())
1988         {
1989             PangoAttrList *attrs = pango_attr_list_new();
1990             PangoAttribute *attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
1991             pango_attr_list_insert(attrs, attr);
1992             pango_layout_set_attributes(layout, attrs);
1993             pango_attr_list_unref(attrs);
1994         }
1995
1996         cairo_move_to(m_context, x, y);
1997         pango_cairo_show_layout (m_context, layout);
1998
1999         g_object_unref (layout);
2000
2001         // Don't use Cairo text API, we already did everything.
2002         return;
2003 #endif
2004     }
2005
2006     // Cairo's x,y for drawing text is at the baseline, so we need to adjust
2007     // the position we move to by the ascent.
2008     cairo_font_extents_t fe;
2009     cairo_font_extents(m_context, &fe);
2010     cairo_move_to(m_context, x, y+fe.ascent);
2011
2012     cairo_show_text(m_context, data);
2013 }
2014
2015 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
2016                                     wxDouble *descent, wxDouble *externalLeading ) const
2017 {
2018     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
2019
2020     if ( width )
2021         *width = 0;
2022     if ( height )
2023         *height = 0;
2024     if ( descent )
2025         *descent = 0;
2026     if ( externalLeading )
2027         *externalLeading = 0;
2028
2029     if ( str.empty())
2030         return;
2031
2032     if ( ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this) )
2033     {
2034 #ifdef __WXGTK__
2035         int w, h;
2036
2037         PangoLayout *layout = pango_cairo_create_layout (m_context);
2038         pango_layout_set_font_description( layout, ((wxCairoFontData*)m_font.GetRefData())->GetFont());
2039         const wxCharBuffer data = str.utf8_str();
2040         if ( !data )
2041         {
2042             return;
2043         }
2044         pango_layout_set_text( layout, data, strlen(data) );
2045         pango_layout_get_pixel_size (layout, &w, &h);
2046         if ( width )
2047             *width = w;
2048         if ( height )
2049             *height = h;
2050         if (descent)
2051         {
2052             PangoLayoutIter *iter = pango_layout_get_iter(layout);
2053             int baseline = pango_layout_iter_get_baseline(iter);
2054             pango_layout_iter_free(iter);
2055             *descent = h - PANGO_PIXELS(baseline);
2056         }
2057         g_object_unref (layout);
2058         return;
2059 #endif
2060     }
2061
2062     if (width)
2063     {
2064         const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
2065         cairo_text_extents_t te;
2066         cairo_text_extents(m_context, buf, &te);
2067         *width = te.width;
2068     }
2069
2070     if (height || descent || externalLeading)
2071     {
2072         cairo_font_extents_t fe;
2073         cairo_font_extents(m_context, &fe);
2074
2075         // some backends have negative descents
2076
2077         if ( fe.descent < 0 )
2078             fe.descent = -fe.descent;
2079
2080         if ( fe.height < (fe.ascent + fe.descent ) )
2081         {
2082             // some backends are broken re height ... (eg currently ATSUI)
2083             fe.height = fe.ascent + fe.descent;
2084         }
2085
2086         if (height)
2087             *height = fe.height;
2088         if ( descent )
2089             *descent = fe.descent;
2090         if ( externalLeading )
2091             *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
2092     }
2093 }
2094
2095 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
2096 {
2097     widths.Empty();
2098     widths.Add(0, text.length());
2099
2100     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
2101
2102     if (text.empty())
2103         return;
2104
2105     // TODO
2106 }
2107
2108 void * wxCairoContext::GetNativeContext()
2109 {
2110     return m_context;
2111 }
2112
2113 bool wxCairoContext::SetAntialiasMode(wxAntialiasMode antialias)
2114 {
2115     if (m_antialias == antialias)
2116         return true;
2117
2118     m_antialias = antialias;
2119
2120     cairo_antialias_t antialiasMode;
2121     switch (antialias)
2122     {
2123         case wxANTIALIAS_DEFAULT:
2124             antialiasMode = CAIRO_ANTIALIAS_DEFAULT;
2125             break;
2126         case wxANTIALIAS_NONE:
2127             antialiasMode = CAIRO_ANTIALIAS_NONE;
2128             break;
2129         default:
2130             return false;
2131     }
2132     cairo_set_antialias(m_context, antialiasMode);
2133     return true;
2134 }
2135
2136 bool wxCairoContext::SetInterpolationQuality(wxInterpolationQuality WXUNUSED(interpolation))
2137 {
2138     // placeholder
2139     return false;
2140 }
2141
2142 bool wxCairoContext::SetCompositionMode(wxCompositionMode op)
2143 {
2144     if ( m_composition == op )
2145         return true;
2146
2147     m_composition = op;
2148     cairo_operator_t cop;
2149     switch (op)
2150     {
2151         case wxCOMPOSITION_CLEAR:
2152             cop = CAIRO_OPERATOR_CLEAR;
2153             break;
2154         case wxCOMPOSITION_SOURCE:
2155             cop = CAIRO_OPERATOR_SOURCE;
2156             break;
2157         case wxCOMPOSITION_OVER:
2158             cop = CAIRO_OPERATOR_OVER;
2159             break;
2160         case wxCOMPOSITION_IN:
2161             cop = CAIRO_OPERATOR_IN;
2162             break;
2163         case wxCOMPOSITION_OUT:
2164             cop = CAIRO_OPERATOR_OUT;
2165             break;
2166         case wxCOMPOSITION_ATOP:
2167             cop = CAIRO_OPERATOR_ATOP;
2168             break;
2169         case wxCOMPOSITION_DEST:
2170             cop = CAIRO_OPERATOR_DEST;
2171             break;
2172         case wxCOMPOSITION_DEST_OVER:
2173             cop = CAIRO_OPERATOR_DEST_OVER;
2174             break;
2175         case wxCOMPOSITION_DEST_IN:
2176             cop = CAIRO_OPERATOR_DEST_IN;
2177             break;
2178         case wxCOMPOSITION_DEST_OUT:
2179             cop = CAIRO_OPERATOR_DEST_OUT;
2180             break;
2181         case wxCOMPOSITION_DEST_ATOP:
2182             cop = CAIRO_OPERATOR_DEST_ATOP;
2183             break;
2184         case wxCOMPOSITION_XOR:
2185             cop = CAIRO_OPERATOR_XOR;
2186             break;
2187         case wxCOMPOSITION_ADD:
2188             cop = CAIRO_OPERATOR_ADD;
2189             break;
2190         default:
2191             return false;
2192     }
2193     cairo_set_operator(m_context, cop);
2194     return true;
2195 }
2196
2197 void wxCairoContext::BeginLayer(wxDouble opacity)
2198 {
2199     m_layerOpacities.push_back(opacity);
2200     cairo_push_group(m_context);
2201 }
2202
2203 void wxCairoContext::EndLayer()
2204 {
2205     float opacity = m_layerOpacities.back();
2206     m_layerOpacities.pop_back();
2207     cairo_pop_group_to_source(m_context);
2208     cairo_paint_with_alpha(m_context,opacity);
2209 }
2210
2211 //-----------------------------------------------------------------------------
2212 // wxCairoRenderer declaration
2213 //-----------------------------------------------------------------------------
2214
2215 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
2216 {
2217 public :
2218     wxCairoRenderer() {}
2219
2220     virtual ~wxCairoRenderer() {}
2221
2222     // Context
2223
2224     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
2225     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
2226     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
2227
2228     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
2229
2230     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
2231 #if wxUSE_IMAGE
2232     virtual wxGraphicsContext * CreateContextFromImage(wxImage& image);
2233 #endif // wxUSE_IMAGE
2234
2235     virtual wxGraphicsContext * CreateContext( wxWindow* window );
2236
2237     virtual wxGraphicsContext * CreateMeasuringContext();
2238 #ifdef __WXMSW__
2239 #if wxUSE_ENH_METAFILE
2240     virtual wxGraphicsContext * CreateContext( const wxEnhMetaFileDC& dc);
2241 #endif
2242 #endif
2243     // Path
2244
2245     virtual wxGraphicsPath CreatePath();
2246
2247     // Matrix
2248
2249     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
2250         wxDouble tx=0.0, wxDouble ty=0.0);
2251
2252
2253     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
2254
2255     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
2256
2257     virtual wxGraphicsBrush
2258     CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2259                               wxDouble x2, wxDouble y2,
2260                               const wxGraphicsGradientStops& stops);
2261
2262     virtual wxGraphicsBrush
2263     CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2264                               wxDouble xc, wxDouble yc,
2265                               wxDouble radius,
2266                               const wxGraphicsGradientStops& stops);
2267
2268     // sets the font
2269     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
2270     virtual wxGraphicsFont CreateFont(double sizeInPixels,
2271                                       const wxString& facename,
2272                                       int flags = wxFONTFLAG_DEFAULT,
2273                                       const wxColour& col = *wxBLACK);
2274
2275     // create a native bitmap representation
2276     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap );
2277 #if wxUSE_IMAGE
2278     virtual wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image);
2279     virtual wxImage CreateImageFromBitmap(const wxGraphicsBitmap& bmp);
2280 #endif // wxUSE_IMAGE
2281
2282     // create a graphics bitmap from a native bitmap
2283     virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
2284
2285     // create a subimage from a native image representation
2286     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  );
2287
2288 protected :
2289     bool EnsureIsLoaded();
2290     void Load();
2291     void Unload();
2292     friend class wxCairoModule;
2293 private :
2294     int m_loaded;
2295     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
2296 } ;
2297
2298 //-----------------------------------------------------------------------------
2299 // wxCairoRenderer implementation
2300 //-----------------------------------------------------------------------------
2301
2302 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
2303
2304 static wxCairoRenderer gs_cairoGraphicsRenderer;
2305 // temporary hack to allow creating a cairo context on any platform
2306 extern wxGraphicsRenderer* gCairoRenderer;
2307 wxGraphicsRenderer* gCairoRenderer = &gs_cairoGraphicsRenderer;
2308
2309 bool wxCairoRenderer::EnsureIsLoaded()
2310 {
2311 #ifndef __WXGTK__
2312     Load();
2313     return wxCairoInit();
2314 #else
2315     return true;
2316 #endif
2317 }
2318
2319 void wxCairoRenderer::Load()
2320 {
2321     wxCairoInit();
2322 }
2323
2324 void wxCairoRenderer::Unload()
2325 {
2326     wxCairoCleanUp();
2327 }
2328
2329 // call EnsureIsLoaded() and return returnOnFail value if it fails
2330 #define ENSURE_LOADED_OR_RETURN(returnOnFail)  \
2331     if ( !EnsureIsLoaded() )                   \
2332         return (returnOnFail)
2333
2334 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
2335 {
2336     ENSURE_LOADED_OR_RETURN(NULL);
2337     return new wxCairoContext(this,dc);
2338 }
2339
2340 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
2341 {
2342     ENSURE_LOADED_OR_RETURN(NULL);
2343     return new wxCairoContext(this,dc);
2344 }
2345
2346 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
2347 {
2348     ENSURE_LOADED_OR_RETURN(NULL);
2349     return new wxCairoContext(this, dc);
2350 }
2351
2352 #ifdef __WXMSW__
2353 #if wxUSE_ENH_METAFILE
2354 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxEnhMetaFileDC& WXUNUSED(dc) )
2355 {
2356     ENSURE_LOADED_OR_RETURN(NULL);
2357     return NULL;
2358 }
2359 #endif
2360 #endif
2361
2362 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
2363 {
2364     ENSURE_LOADED_OR_RETURN(NULL);
2365 #ifdef __WXMSW__
2366     return new wxCairoContext(this,(HDC)context);
2367 #else
2368     return new wxCairoContext(this,(cairo_t*)context);
2369 #endif
2370 }
2371
2372
2373 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
2374 {
2375     ENSURE_LOADED_OR_RETURN(NULL);
2376 #ifdef __WXGTK__
2377     return new wxCairoContext(this,(GdkDrawable*)window);
2378 #else
2379     wxUnusedVar(window);
2380     return NULL;
2381 #endif
2382 }
2383
2384 #if wxUSE_IMAGE
2385 wxGraphicsContext * wxCairoRenderer::CreateContextFromImage(wxImage& image)
2386 {
2387     return new wxCairoImageContext(this, image);
2388 }
2389 #endif // wxUSE_IMAGE
2390
2391 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
2392 {
2393     ENSURE_LOADED_OR_RETURN(NULL);
2394 #ifdef __WXGTK__
2395     return CreateContextFromNativeWindow(gdk_get_default_root_window());
2396 #endif
2397     return NULL;
2398     // TODO
2399 }
2400
2401 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
2402 {
2403     ENSURE_LOADED_OR_RETURN(NULL);
2404     return new wxCairoContext(this, window );
2405 }
2406
2407 // Path
2408
2409 wxGraphicsPath wxCairoRenderer::CreatePath()
2410 {
2411     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPath);
2412     wxGraphicsPath path;
2413     path.SetRefData( new wxCairoPathData(this) );
2414     return path;
2415 }
2416
2417
2418 // Matrix
2419
2420 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
2421                                                 wxDouble tx, wxDouble ty)
2422
2423 {
2424     ENSURE_LOADED_OR_RETURN(wxNullGraphicsMatrix);
2425     wxGraphicsMatrix m;
2426     wxCairoMatrixData* data = new wxCairoMatrixData( this );
2427     data->Set( a,b,c,d,tx,ty ) ;
2428     m.SetRefData(data);
2429     return m;
2430 }
2431
2432 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
2433 {
2434     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPen);
2435     if ( !pen.IsOk() || pen.GetStyle() == wxPENSTYLE_TRANSPARENT )
2436         return wxNullGraphicsPen;
2437     else
2438     {
2439         wxGraphicsPen p;
2440         p.SetRefData(new wxCairoPenData( this, pen ));
2441         return p;
2442     }
2443 }
2444
2445 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
2446 {
2447     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2448     if ( !brush.IsOk() || brush.GetStyle() == wxBRUSHSTYLE_TRANSPARENT )
2449         return wxNullGraphicsBrush;
2450     else
2451     {
2452         wxGraphicsBrush p;
2453         p.SetRefData(new wxCairoBrushData( this, brush ));
2454         return p;
2455     }
2456 }
2457
2458 wxGraphicsBrush
2459 wxCairoRenderer::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2460                                            wxDouble x2, wxDouble y2,
2461                                            const wxGraphicsGradientStops& stops)
2462 {
2463     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2464     wxGraphicsBrush p;
2465     wxCairoBrushData* d = new wxCairoBrushData( this );
2466     d->CreateLinearGradientBrush(x1, y1, x2, y2, stops);
2467     p.SetRefData(d);
2468     return p;
2469 }
2470
2471 wxGraphicsBrush
2472 wxCairoRenderer::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2473                                            wxDouble xc, wxDouble yc, wxDouble r,
2474                                            const wxGraphicsGradientStops& stops)
2475 {
2476     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2477     wxGraphicsBrush p;
2478     wxCairoBrushData* d = new wxCairoBrushData( this );
2479     d->CreateRadialGradientBrush(xo, yo, xc, yc, r, stops);
2480     p.SetRefData(d);
2481     return p;
2482 }
2483
2484 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
2485 {
2486     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
2487     if ( font.IsOk() )
2488     {
2489         wxGraphicsFont p;
2490         p.SetRefData(new wxCairoFontData( this , font, col ));
2491         return p;
2492     }
2493     else
2494         return wxNullGraphicsFont;
2495 }
2496
2497 wxGraphicsFont
2498 wxCairoRenderer::CreateFont(double sizeInPixels,
2499                             const wxString& facename,
2500                             int flags,
2501                             const wxColour& col)
2502 {
2503     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
2504
2505     wxGraphicsFont font;
2506     font.SetRefData(new wxCairoFontData(this, sizeInPixels, facename, flags, col));
2507     return font;
2508 }
2509
2510 wxGraphicsBitmap wxCairoRenderer::CreateBitmap( const wxBitmap& bmp )
2511 {
2512     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2513     if ( bmp.IsOk() )
2514     {
2515         wxGraphicsBitmap p;
2516         p.SetRefData(new wxCairoBitmapData( this , bmp ));
2517         return p;
2518     }
2519     else
2520         return wxNullGraphicsBitmap;
2521 }
2522
2523 #if wxUSE_IMAGE
2524
2525 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromImage(const wxImage& image)
2526 {
2527     wxGraphicsBitmap bmp;
2528
2529     ENSURE_LOADED_OR_RETURN(bmp);
2530
2531     if ( image.IsOk() )
2532     {
2533         bmp.SetRefData(new wxCairoBitmapData(this, image));
2534     }
2535
2536     return bmp;
2537 }
2538
2539 wxImage wxCairoRenderer::CreateImageFromBitmap(const wxGraphicsBitmap& bmp)
2540 {
2541     ENSURE_LOADED_OR_RETURN(wxNullImage);
2542
2543     const wxCairoBitmapData* const
2544         data = static_cast<wxCairoBitmapData*>(bmp.GetGraphicsData());
2545
2546     return data ? data->ConvertToImage() : wxNullImage;
2547 }
2548
2549 #endif // wxUSE_IMAGE
2550
2551
2552 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromNativeBitmap( void* bitmap )
2553 {
2554     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2555     if ( bitmap != NULL )
2556     {
2557         wxGraphicsBitmap p;
2558         p.SetRefData(new wxCairoBitmapData( this , (cairo_surface_t*) bitmap ));
2559         return p;
2560     }
2561     else
2562         return wxNullGraphicsBitmap;
2563 }
2564
2565 wxGraphicsBitmap
2566 wxCairoRenderer::CreateSubBitmap(const wxGraphicsBitmap& WXUNUSED(bitmap),
2567                                  wxDouble WXUNUSED(x),
2568                                  wxDouble WXUNUSED(y),
2569                                  wxDouble WXUNUSED(w),
2570                                  wxDouble WXUNUSED(h))
2571 {
2572     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2573     wxFAIL_MSG("wxCairoRenderer::CreateSubBitmap is not implemented.");
2574     return wxNullGraphicsBitmap;
2575 }
2576
2577 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2578 {
2579     return &gs_cairoGraphicsRenderer;
2580 }
2581
2582 #else // !wxUSE_CAIRO
2583
2584 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2585 {
2586     return NULL;
2587 }
2588
2589 #endif  // wxUSE_CAIRO/!wxUSE_CAIRO
2590
2591 // MSW and OS X have their own native default renderers, but the other ports
2592 // use Cairo by default
2593 #if !(defined(__WXMSW__) || defined(__WXOSX__))
2594 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
2595 {
2596     return GetCairoRenderer();
2597 }
2598 #endif // !(__WXMSW__ || __WXOSX__)
2599
2600 #endif // wxUSE_GRAPHICS_CONTEXT