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     #include "wx/window.h"
  37 #endif
  38
  39 #include "wx/private/graphics.h"
  40 #include "wx/rawbmp.h"
  41 #include "wx/vector.h"
  42
  43 using namespace std;
  44
  45 //-----------------------------------------------------------------------------
  46 // device context implementation
  47 //
  48 // more and more of the dc functionality should be implemented by calling
  49 // the appropricate wxCairoContext, but we will have to do that step by step
  50 // also coordinate conversions should be moved to native matrix ops
  51 //-----------------------------------------------------------------------------
  52
  53 // we always stock two context states, one at entry, to be able to preserve the
  54 // state we were called with, the other one after changing to HI Graphics orientation
  55 // (this one is used for getting back clippings etc)
  56
  57 //-----------------------------------------------------------------------------
  58 // wxGraphicsPath implementation
  59 //-----------------------------------------------------------------------------
  60
  61 // TODO remove this dependency (gdiplus needs the macros)
  62
  63 #ifndef max
  64 #define max(a,b)            (((a) > (b)) ? (a) : (b))
  65 #endif
  66
  67 #ifndef min
  68 #define min(a,b)            (((a) < (b)) ? (a) : (b))
  69 #endif
  70
  71 #include <cairo.h>
  72 #ifdef __WXMSW__
  73 #include <cairo-win32.h>
  74 #endif
  75
  76 #ifdef __WXGTK__
  77 #include <gtk/gtk.h>
  78 #include "wx/fontutil.h"
  79 #include "wx/gtk/dc.h"
  80 #endif
  81
  82 #ifdef __WXMSW__
  83 #include <cairo-win32.h>
  84 // We must do this as cairo-win32.h includes windows.h which pollutes the
  85 // global name space with macros.
  86 #include "wx/msw/winundef.h"
  87 #endif
  88
  89 #ifdef __WXMAC__
  90 #include "wx/osx/private.h"
  91 #include <cairo-quartz.h>
  92 #include <cairo-atsui.h>
  93 #endif
  94
  95 class WXDLLIMPEXP_CORE wxCairoPathData : public wxGraphicsPathData
  96 {
  97 public :
  98     wxCairoPathData(wxGraphicsRenderer* renderer, cairo_t* path = NULL);
  99     ~wxCairoPathData();
 100
 101     virtual wxGraphicsObjectRefData *Clone() const;
 102
 103     //
 104     // These are the path primitives from which everything else can be constructed
 105     //
 106
 107     // begins a new subpath at (x,y)
 108     virtual void MoveToPoint( wxDouble x, wxDouble y );
 109
 110     // adds a straight line from the current point to (x,y)
 111     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 112
 113     // adds a cubic Bezier curve from the current point, using two control points and an end point
 114     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 115
 116
 117     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 118     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 119
 120     // gets the last point of the current path, (0,0) if not yet set
 121     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 122
 123     // adds another path
 124     virtual void AddPath( const wxGraphicsPathData* path );
 125
 126     // closes the current sub-path
 127     virtual void CloseSubpath();
 128
 129     //
 130     // These are convenience functions which - if not available natively will be assembled
 131     // using the primitives from above
 132     //
 133
 134     /*
 135
 136     // appends a rectangle as a new closed subpath
 137     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 138     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 139     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 140
 141     // 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)
 142     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 143     */
 144
 145     // returns the native path
 146     virtual void * GetNativePath() const ;
 147
 148     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 149     virtual void UnGetNativePath(void *p) const;
 150
 151     // transforms each point of this path by the matrix
 152     virtual void Transform( const wxGraphicsMatrixData* matrix ) ;
 153
 154     // gets the bounding box enclosing all points (possibly including control points)
 155     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
 156
 157     virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxWINDING_RULE) const;
 158
 159 private :
 160     cairo_t* m_pathContext;
 161 };
 162
 163 class WXDLLIMPEXP_CORE wxCairoMatrixData : public wxGraphicsMatrixData
 164 {
 165 public :
 166     wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix = NULL ) ;
 167     virtual ~wxCairoMatrixData() ;
 168
 169     virtual wxGraphicsObjectRefData *Clone() const ;
 170
 171     // concatenates the matrix
 172     virtual void Concat( const wxGraphicsMatrixData *t );
 173
 174     // sets the matrix to the respective values
 175     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 176         wxDouble tx=0.0, wxDouble ty=0.0);
 177
 178     // gets the component valuess of the matrix
 179     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
 180                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
 181
 182     // makes this the inverse matrix
 183     virtual void Invert();
 184
 185     // returns true if the elements of the transformation matrix are equal ?
 186     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
 187
 188     // return true if this is the identity matrix
 189     virtual bool IsIdentity() const;
 190
 191     //
 192     // transformation
 193     //
 194
 195     // add the translation to this matrix
 196     virtual void Translate( wxDouble dx , wxDouble dy );
 197
 198     // add the scale to this matrix
 199     virtual void Scale( wxDouble xScale , wxDouble yScale );
 200
 201     // add the rotation to this matrix (radians)
 202     virtual void Rotate( wxDouble angle );
 203
 204     //
 205     // apply the transforms
 206     //
 207
 208     // applies that matrix to the point
 209     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 210
 211     // applies the matrix except for translations
 212     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 213
 214     // returns the native representation
 215     virtual void * GetNativeMatrix() const;
 216 private:
 217     cairo_matrix_t m_matrix ;
 218 } ;
 219
 220 class WXDLLIMPEXP_CORE wxCairoPenData : public wxGraphicsObjectRefData
 221 {
 222 public:
 223     wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 224     ~wxCairoPenData();
 225
 226     void Init();
 227
 228     virtual void Apply( wxGraphicsContext* context );
 229     virtual wxDouble GetWidth() { return m_width; }
 230
 231 private :
 232     double m_width;
 233
 234     double m_red;
 235     double m_green;
 236     double m_blue;
 237     double m_alpha;
 238
 239     cairo_line_cap_t m_cap;
 240     cairo_line_join_t m_join;
 241
 242     int m_count;
 243     const double *m_lengths;
 244     double *m_userLengths;
 245
 246     wxPen m_pen;
 247
 248     wxDECLARE_NO_COPY_CLASS(wxCairoPenData);
 249 };
 250
 251 class WXDLLIMPEXP_CORE wxCairoBrushData : public wxGraphicsObjectRefData
 252 {
 253 public:
 254     wxCairoBrushData( wxGraphicsRenderer* renderer );
 255     wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 256     ~wxCairoBrushData ();
 257
 258     virtual void Apply( wxGraphicsContext* context );
 259
 260     void CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 261                                    wxDouble x2, wxDouble y2,
 262                                    const wxGraphicsGradientStops& stops);
 263     void CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 264                                    wxDouble xc, wxDouble yc, wxDouble radius,
 265                                    const wxGraphicsGradientStops& stops);
 266
 267 protected:
 268     virtual void Init();
 269
 270     // common part of Create{Linear,Radial}GradientBrush()
 271     void AddGradientStops(const wxGraphicsGradientStops& stops);
 272
 273 private :
 274     double m_red;
 275     double m_green;
 276     double m_blue;
 277     double m_alpha;
 278
 279     cairo_pattern_t* m_brushPattern;
 280 };
 281
 282 class wxCairoFontData : public wxGraphicsObjectRefData
 283 {
 284 public:
 285     wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col );
 286     wxCairoFontData(wxGraphicsRenderer* renderer,
 287                     double sizeInPixels,
 288                     const wxString& facename,
 289                     int flags,
 290                     const wxColour& col);
 291     ~wxCairoFontData();
 292
 293     virtual bool Apply( wxGraphicsContext* context );
 294 #ifdef __WXGTK__
 295     const wxFont& GetFont() const { return m_wxfont; }
 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     wxFont m_wxfont;
 312 #endif
 313
 314     // These members are used when the font is created from its face name and
 315     // flags (and not from wxFont) and also even when creating it from wxFont
 316     // on the platforms not covered above.
 317     //
 318     // Notice that we can't use cairo_font_face_t instead of storing those,
 319     // even though it would be simpler and need less #ifdefs, because
 320     // cairo_toy_font_face_create() that we'd need to create it is only
 321     // available in Cairo 1.8 and we require just 1.2 currently. If we do drop
 322     // support for < 1.8 versions in the future it would be definitely better
 323     // to use cairo_toy_font_face_create() instead.
 324     wxCharBuffer m_fontName;
 325     cairo_font_slant_t m_slant;
 326     cairo_font_weight_t m_weight;
 327 };
 328
 329 class wxCairoBitmapData : public wxGraphicsObjectRefData
 330 {
 331 public:
 332     wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp );
 333 #if wxUSE_IMAGE
 334     wxCairoBitmapData(wxGraphicsRenderer* renderer, const wxImage& image);
 335 #endif // wxUSE_IMAGE
 336     wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap );
 337     ~wxCairoBitmapData();
 338
 339     virtual cairo_surface_t* GetCairoSurface() { return m_surface; }
 340     virtual cairo_pattern_t* GetCairoPattern() { return m_pattern; }
 341     virtual wxSize GetSize() { return wxSize(m_width, m_height); }
 342
 343 #if wxUSE_IMAGE
 344     wxImage ConvertToImage() const;
 345 #endif // wxUSE_IMAGE
 346
 347 private :
 348     // Allocate m_buffer for the bitmap of the given size in the given format.
 349     //
 350     // Returns the stride used for the buffer.
 351     int InitBuffer(int width, int height, cairo_format_t format);
 352
 353     // Really create the surface using the buffer (which was supposed to be
 354     // filled since InitBuffer() call).
 355     void InitSurface(cairo_format_t format, int stride);
 356
 357
 358     cairo_surface_t* m_surface;
 359     cairo_pattern_t* m_pattern;
 360     int m_width;
 361     int m_height;
 362     unsigned char* m_buffer;
 363 };
 364
 365 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
 366 {
 367 public:
 368     wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc );
 369     wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc );
 370     wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc );
 371 #ifdef __WXGTK__
 372     wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable );
 373 #endif
 374 #ifdef __WXMSW__
 375     wxCairoContext( wxGraphicsRenderer* renderer, HDC context );
 376 #endif
 377     wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context );
 378     wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window);
 379
 380     // If this ctor is used, Init() must be called by the derived class later.
 381     wxCairoContext( wxGraphicsRenderer* renderer );
 382
 383     virtual ~wxCairoContext();
 384
 385     virtual bool ShouldOffset() const
 386     {
 387         if ( !m_enableOffset )
 388             return false;
 389
 390         int penwidth = 0 ;
 391         if ( !m_pen.IsNull() )
 392         {
 393             penwidth = (int)((wxCairoPenData*)m_pen.GetRefData())->GetWidth();
 394             if ( penwidth == 0 )
 395                 penwidth = 1;
 396         }
 397         return ( penwidth % 2 ) == 1;
 398     }
 399
 400     virtual void Clip( const wxRegion &region );
 401 #ifdef __WXMSW__
 402     cairo_surface_t* m_mswSurface;
 403 #endif
 404
 405     // clips drawings to the rect
 406     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 407
 408     // resets the clipping to original extent
 409     virtual void ResetClip();
 410
 411     virtual void * GetNativeContext();
 412
 413     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
 414
 415     virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation);
 416
 417     virtual bool SetCompositionMode(wxCompositionMode op);
 418
 419     virtual void BeginLayer(wxDouble opacity);
 420
 421     virtual void EndLayer();
 422
 423     virtual void StrokePath( const wxGraphicsPath& p );
 424     virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxWINDING_RULE );
 425
 426     virtual void Translate( wxDouble dx , wxDouble dy );
 427     virtual void Scale( wxDouble xScale , wxDouble yScale );
 428     virtual void Rotate( wxDouble angle );
 429
 430     // concatenates this transform with the current transform of this context
 431     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 432
 433     // sets the transform of this context
 434     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 435
 436     // gets the matrix of this context
 437     virtual wxGraphicsMatrix GetTransform() const;
 438
 439     virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 440     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 441     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 442     virtual void PushState();
 443     virtual void PopState();
 444
 445     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 446                                 wxDouble *descent, wxDouble *externalLeading ) const;
 447     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 448
 449 protected:
 450     virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
 451
 452     void Init(cairo_t *context);
 453
 454 private:
 455     cairo_t* m_context;
 456
 457     wxVector<float> m_layerOpacities;
 458
 459     wxDECLARE_NO_COPY_CLASS(wxCairoContext);
 460 };
 461
 462 #if wxUSE_IMAGE
 463 // ----------------------------------------------------------------------------
 464 // wxCairoImageContext: context associated with a wxImage.
 465 // ----------------------------------------------------------------------------
 466
 467 class wxCairoImageContext : public wxCairoContext
 468 {
 469 public:
 470     wxCairoImageContext(wxGraphicsRenderer* renderer, wxImage& image) :
 471         wxCairoContext(renderer),
 472         m_image(image),
 473         m_data(renderer, image)
 474     {
 475         Init(cairo_create(m_data.GetCairoSurface()));
 476     }
 477
 478     virtual ~wxCairoImageContext()
 479     {
 480         m_image = m_data.ConvertToImage();
 481     }
 482
 483 private:
 484     wxImage& m_image;
 485     wxCairoBitmapData m_data;
 486
 487     wxDECLARE_NO_COPY_CLASS(wxCairoImageContext);
 488 };
 489 #endif // wxUSE_IMAGE
 490
 491 //-----------------------------------------------------------------------------
 492 // wxCairoPenData implementation
 493 //-----------------------------------------------------------------------------
 494
 495 wxCairoPenData::~wxCairoPenData()
 496 {
 497     delete[] m_userLengths;
 498 }
 499
 500 void wxCairoPenData::Init()
 501 {
 502     m_lengths = NULL;
 503     m_userLengths = NULL;
 504     m_width = 0;
 505     m_count = 0;
 506 }
 507
 508 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 509 : wxGraphicsObjectRefData(renderer)
 510 {
 511     Init();
 512     m_pen = pen;
 513     m_width = m_pen.GetWidth();
 514     if (m_width <= 0.0)
 515         m_width = 0.1;
 516
 517     m_red = m_pen.GetColour().Red()/255.0;
 518     m_green = m_pen.GetColour().Green()/255.0;
 519     m_blue = m_pen.GetColour().Blue()/255.0;
 520     m_alpha = m_pen.GetColour().Alpha()/255.0;
 521
 522     switch ( m_pen.GetCap() )
 523     {
 524     case wxCAP_ROUND :
 525         m_cap = CAIRO_LINE_CAP_ROUND;
 526         break;
 527
 528     case wxCAP_PROJECTING :
 529         m_cap = CAIRO_LINE_CAP_SQUARE;
 530         break;
 531
 532     case wxCAP_BUTT :
 533         m_cap = CAIRO_LINE_CAP_BUTT;
 534         break;
 535
 536     default :
 537         m_cap = CAIRO_LINE_CAP_BUTT;
 538         break;
 539     }
 540
 541     switch ( m_pen.GetJoin() )
 542     {
 543     case wxJOIN_BEVEL :
 544         m_join = CAIRO_LINE_JOIN_BEVEL;
 545         break;
 546
 547     case wxJOIN_MITER :
 548         m_join = CAIRO_LINE_JOIN_MITER;
 549         break;
 550
 551     case wxJOIN_ROUND :
 552         m_join = CAIRO_LINE_JOIN_ROUND;
 553         break;
 554
 555     default :
 556         m_join = CAIRO_LINE_JOIN_MITER;
 557         break;
 558     }
 559
 560     const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
 561     const double dotted[] =
 562     {
 563         dashUnit , dashUnit + 2.0
 564     };
 565     static const double short_dashed[] =
 566     {
 567         9.0 , 6.0
 568     };
 569     static const double dashed[] =
 570     {
 571         19.0 , 9.0
 572     };
 573     static const double dotted_dashed[] =
 574     {
 575         9.0 , 6.0 , 3.0 , 3.0
 576     };
 577
 578     switch ( m_pen.GetStyle() )
 579     {
 580     case wxPENSTYLE_SOLID :
 581         break;
 582
 583     case wxPENSTYLE_DOT :
 584         m_count = WXSIZEOF(dotted);
 585         m_userLengths = new double[ m_count ] ;
 586         memcpy( m_userLengths, dotted, sizeof(dotted) );
 587         m_lengths = m_userLengths;
 588         break;
 589
 590     case wxPENSTYLE_LONG_DASH :
 591         m_lengths = dashed ;
 592         m_count = WXSIZEOF(dashed);
 593         break;
 594
 595     case wxPENSTYLE_SHORT_DASH :
 596         m_lengths = short_dashed ;
 597         m_count = WXSIZEOF(short_dashed);
 598         break;
 599
 600     case wxPENSTYLE_DOT_DASH :
 601         m_lengths = dotted_dashed ;
 602         m_count = WXSIZEOF(dotted_dashed);
 603         break;
 604
 605     case wxPENSTYLE_USER_DASH :
 606         {
 607             wxDash *wxdashes ;
 608             m_count = m_pen.GetDashes( &wxdashes ) ;
 609             if ((wxdashes != NULL) && (m_count > 0))
 610             {
 611                 m_userLengths = new double[m_count] ;
 612                 for ( int i = 0 ; i < m_count ; ++i )
 613                 {
 614                     m_userLengths[i] = wxdashes[i] * dashUnit ;
 615
 616                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 617                         m_userLengths[i] = dashUnit + 2.0 ;
 618                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 619                         m_userLengths[i] = dashUnit ;
 620                 }
 621             }
 622             m_lengths = m_userLengths ;
 623         }
 624         break;
 625     case wxPENSTYLE_STIPPLE :
 626         {
 627             /*
 628             wxBitmap* bmp = pen.GetStipple();
 629             if ( bmp && bmp->IsOk() )
 630             {
 631             wxDELETE( m_penImage );
 632             wxDELETE( m_penBrush );
 633             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 634             m_penBrush = new TextureBrush(m_penImage);
 635             m_pen->SetBrush( m_penBrush );
 636             }
 637             */
 638         }
 639         break;
 640     default :
 641         if ( m_pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH
 642             && m_pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
 643         {
 644             /*
 645             wxDELETE( m_penBrush );
 646             HatchStyle style = HatchStyleHorizontal;
 647             switch( pen.GetStyle() )
 648             {
 649             case wxPENSTYLE_BDIAGONAL_HATCH :
 650             style = HatchStyleBackwardDiagonal;
 651             break ;
 652             case wxPENSTYLE_CROSSDIAG_HATCH :
 653             style = HatchStyleDiagonalCross;
 654             break ;
 655             case wxPENSTYLE_FDIAGONAL_HATCH :
 656             style = HatchStyleForwardDiagonal;
 657             break ;
 658             case wxPENSTYLE_CROSS_HATCH :
 659             style = HatchStyleCross;
 660             break ;
 661             case wxPENSTYLE_HORIZONTAL_HATCH :
 662             style = HatchStyleHorizontal;
 663             break ;
 664             case wxPENSTYLE_VERTICAL_HATCH :
 665             style = HatchStyleVertical;
 666             break ;
 667
 668             }
 669             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 670             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 671             m_pen->SetBrush( m_penBrush )
 672             */
 673         }
 674         break;
 675     }
 676 }
 677
 678 void wxCairoPenData::Apply( wxGraphicsContext* context )
 679 {
 680     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 681     cairo_set_line_width(ctext,m_width);
 682     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 683     cairo_set_line_cap(ctext,m_cap);
 684     cairo_set_line_join(ctext,m_join);
 685     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 686 }
 687
 688 //-----------------------------------------------------------------------------
 689 // wxCairoBrushData implementation
 690 //-----------------------------------------------------------------------------
 691
 692 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 693   : wxGraphicsObjectRefData( renderer )
 694 {
 695     Init();
 696 }
 697
 698 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
 699   : wxGraphicsObjectRefData(renderer)
 700 {
 701     Init();
 702
 703     m_red = brush.GetColour().Red()/255.0;
 704     m_green = brush.GetColour().Green()/255.0;
 705     m_blue = brush.GetColour().Blue()/255.0;
 706     m_alpha = brush.GetColour().Alpha()/255.0;
 707     /*
 708     if ( brush.GetStyle() == wxBRUSHSTYLE_SOLID)
 709     {
 710     m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 711     brush.GetColour().Green() , brush.GetColour().Blue() ) );
 712     }
 713     else if ( brush.IsHatch() )
 714     {
 715     HatchStyle style = HatchStyleHorizontal;
 716     switch( brush.GetStyle() )
 717     {
 718     case wxBRUSHSTYLE_BDIAGONAL_HATCH :
 719     style = HatchStyleBackwardDiagonal;
 720     break ;
 721     case wxBRUSHSTYLE_CROSSDIAG_HATCH :
 722     style = HatchStyleDiagonalCross;
 723     break ;
 724     case wxBRUSHSTYLE_FDIAGONAL_HATCH :
 725     style = HatchStyleForwardDiagonal;
 726     break ;
 727     case wxBRUSHSTYLE_CROSS_HATCH :
 728     style = HatchStyleCross;
 729     break ;
 730     case wxBRUSHSTYLE_HORIZONTAL_HATCH :
 731     style = HatchStyleHorizontal;
 732     break ;
 733     case wxBRUSHSTYLE_VERTICAL_HATCH :
 734     style = HatchStyleVertical;
 735     break ;
 736
 737     }
 738     m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 739     brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 740     }
 741     else
 742     {
 743     wxBitmap* bmp = brush.GetStipple();
 744     if ( bmp && bmp->IsOk() )
 745     {
 746     wxDELETE( m_brushImage );
 747     m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 748     m_brush = new TextureBrush(m_brushImage);
 749     }
 750     }
 751     */
 752 }
 753
 754 wxCairoBrushData::~wxCairoBrushData ()
 755 {
 756     if (m_brushPattern)
 757         cairo_pattern_destroy(m_brushPattern);
 758 }
 759
 760 void wxCairoBrushData::Apply( wxGraphicsContext* context )
 761 {
 762     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 763     if ( m_brushPattern )
 764     {
 765         cairo_set_source(ctext,m_brushPattern);
 766     }
 767     else
 768     {
 769         cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 770     }
 771 }
 772
 773 void wxCairoBrushData::AddGradientStops(const wxGraphicsGradientStops& stops)
 774 {
 775     // loop over all the stops, they include the beginning and ending ones
 776     const unsigned numStops = stops.GetCount();
 777     for ( unsigned n = 0; n < numStops; n++ )
 778     {
 779         const wxGraphicsGradientStop stop = stops.Item(n);
 780
 781         const wxColour col = stop.GetColour();
 782
 783         cairo_pattern_add_color_stop_rgba
 784         (
 785             m_brushPattern,
 786             stop.GetPosition(),
 787             col.Red()/255.0,
 788             col.Green()/255.0,
 789             col.Blue()/255.0,
 790             col.Alpha()/255.0
 791         );
 792     }
 793
 794     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS,
 795                  wxT("Couldn't create cairo pattern"));
 796 }
 797
 798 void
 799 wxCairoBrushData::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 800                                             wxDouble x2, wxDouble y2,
 801                                             const wxGraphicsGradientStops& stops)
 802 {
 803     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 804
 805     AddGradientStops(stops);
 806 }
 807
 808 void
 809 wxCairoBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 810                                             wxDouble xc, wxDouble yc,
 811                                             wxDouble radius,
 812                                             const wxGraphicsGradientStops& stops)
 813 {
 814     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 815
 816     AddGradientStops(stops);
 817 }
 818
 819 void wxCairoBrushData::Init()
 820 {
 821     m_brushPattern = NULL;
 822 }
 823
 824 //-----------------------------------------------------------------------------
 825 // wxCairoFontData implementation
 826 //-----------------------------------------------------------------------------
 827
 828 void wxCairoFontData::InitColour(const wxColour& col)
 829 {
 830     m_red = col.Red()/255.0;
 831     m_green = col.Green()/255.0;
 832     m_blue = col.Blue()/255.0;
 833     m_alpha = col.Alpha()/255.0;
 834 }
 835
 836 void
 837 wxCairoFontData::InitFontComponents(const wxString& facename,
 838                                     cairo_font_slant_t slant,
 839                                     cairo_font_weight_t weight)
 840 {
 841     m_fontName = facename.mb_str(wxConvUTF8);
 842     m_slant = slant;
 843     m_weight = weight;
 844 }
 845
 846 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 847                          const wxColour& col )
 848     : wxGraphicsObjectRefData(renderer)
 849 #ifdef __WXGTK__
 850     , m_wxfont(font)
 851 #endif
 852 {
 853     InitColour(col);
 854
 855     m_size = font.GetPointSize();
 856
 857 #ifdef __WXMAC__
 858     m_font = cairo_quartz_font_face_create_for_cgfont( font.OSXGetCGFont() );
 859 #elif defined(__WXGTK__)
 860 #else
 861     InitFontComponents
 862     (
 863         font.GetFaceName(),
 864         font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC
 865                                               : CAIRO_FONT_SLANT_NORMAL,
 866         font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD
 867                                               : CAIRO_FONT_WEIGHT_NORMAL
 868     );
 869 #endif
 870 }
 871
 872 wxCairoFontData::wxCairoFontData(wxGraphicsRenderer* renderer,
 873                                  double sizeInPixels,
 874                                  const wxString& facename,
 875                                  int flags,
 876                                  const wxColour& col) :
 877     wxGraphicsObjectRefData(renderer)
 878 {
 879     InitColour(col);
 880
 881     // Resolution for Cairo image surfaces is 72 DPI meaning that the sizes in
 882     // points and pixels are identical, so we can just pass the size in pixels
 883     // directly to cairo_set_font_size().
 884     m_size = sizeInPixels;
 885
 886 #if defined(__WXMAC__)
 887     m_font = NULL;
 888 #endif
 889
 890     // There is no need to set m_underlined under wxGTK in this case, it can
 891     // only be used if m_font != NULL.
 892
 893     InitFontComponents
 894     (
 895         facename,
 896         flags & wxFONTFLAG_ITALIC ? CAIRO_FONT_SLANT_ITALIC
 897                                   : CAIRO_FONT_SLANT_NORMAL,
 898         flags & wxFONTFLAG_BOLD ? CAIRO_FONT_WEIGHT_BOLD
 899                                 : CAIRO_FONT_WEIGHT_NORMAL
 900     );
 901 }
 902
 903 wxCairoFontData::~wxCairoFontData()
 904 {
 905 #ifdef __WXMAC__
 906     if ( m_font )
 907         cairo_font_face_destroy( m_font );
 908 #endif
 909 }
 910
 911 bool wxCairoFontData::Apply( wxGraphicsContext* context )
 912 {
 913     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 914     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 915 #ifdef __WXGTK__
 916     if (m_wxfont.IsOk())
 917     {
 918         // Nothing to do, the caller uses Pango layout functions to do
 919         // everything.
 920         return true;
 921     }
 922 #elif defined(__WXMAC__)
 923     if ( m_font )
 924     {
 925         cairo_set_font_face(ctext, m_font);
 926         cairo_set_font_size(ctext, m_size );
 927         return true;
 928     }
 929 #endif
 930
 931     // If we get here, we must be on a platform without native font support or
 932     // we're using toy Cairo API even under wxGTK/wxMac.
 933     cairo_select_font_face(ctext, m_fontName, m_slant, m_weight );
 934     cairo_set_font_size(ctext, m_size );
 935
 936     // Indicate that we don't use native fonts for the platforms which care
 937     // about this (currently only wxGTK).
 938     return false;
 939 }
 940
 941 //-----------------------------------------------------------------------------
 942 // wxCairoPathData implementation
 943 //-----------------------------------------------------------------------------
 944
 945 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
 946     : wxGraphicsPathData(renderer)
 947 {
 948     if (pathcontext)
 949     {
 950         m_pathContext = pathcontext;
 951     }
 952     else
 953     {
 954         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 955         m_pathContext = cairo_create(surface);
 956         cairo_surface_destroy (surface);
 957     }
 958 }
 959
 960 wxCairoPathData::~wxCairoPathData()
 961 {
 962     cairo_destroy(m_pathContext);
 963 }
 964
 965 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
 966 {
 967     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 968     cairo_t* pathcontext = cairo_create(surface);
 969     cairo_surface_destroy (surface);
 970
 971     cairo_path_t* path = cairo_copy_path(m_pathContext);
 972     cairo_append_path(pathcontext, path);
 973     cairo_path_destroy(path);
 974     return new wxCairoPathData( GetRenderer() ,pathcontext);
 975 }
 976
 977
 978 void* wxCairoPathData::GetNativePath() const
 979 {
 980     return cairo_copy_path(m_pathContext) ;
 981 }
 982
 983 void wxCairoPathData::UnGetNativePath(void *p) const
 984 {
 985     cairo_path_destroy((cairo_path_t*)p);
 986 }
 987
 988 //
 989 // The Primitives
 990 //
 991
 992 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
 993 {
 994     cairo_move_to(m_pathContext,x,y);
 995 }
 996
 997 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
 998 {
 999     cairo_line_to(m_pathContext,x,y);
1000 }
1001
1002 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
1003 {
1004     cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
1005     cairo_append_path(m_pathContext, p);
1006     UnGetNativePath(p);
1007 }
1008
1009 void wxCairoPathData::CloseSubpath()
1010 {
1011     cairo_close_path(m_pathContext);
1012 }
1013
1014 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
1015 {
1016     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
1017 }
1018
1019 // gets the last point of the current path, (0,0) if not yet set
1020 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
1021 {
1022     double dx,dy;
1023     cairo_get_current_point(m_pathContext,&dx,&dy);
1024     if (x)
1025         *x = dx;
1026     if (y)
1027         *y = dy;
1028 }
1029
1030 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
1031 {
1032     // as clockwise means positive in our system (y pointing downwards)
1033     // TODO make this interpretation dependent of the
1034     // real device trans
1035     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
1036         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
1037     else
1038         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
1039 }
1040
1041 // transforms each point of this path by the matrix
1042 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
1043 {
1044     // as we don't have a true path object, we have to apply the inverse
1045     // matrix to the context
1046     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
1047     cairo_matrix_invert( &m );
1048     cairo_transform(m_pathContext,&m);
1049 }
1050
1051 // gets the bounding box enclosing all points (possibly including control points)
1052 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
1053 {
1054     double x1,y1,x2,y2;
1055
1056     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
1057     if ( x2 < x1 )
1058     {
1059         *x = x2;
1060         *w = x1-x2;
1061     }
1062     else
1063     {
1064         *x = x1;
1065         *w = x2-x1;
1066     }
1067
1068     if( y2 < y1 )
1069     {
1070         *y = y2;
1071         *h = y1-y2;
1072     }
1073     else
1074     {
1075         *y = y1;
1076         *h = y2-y1;
1077     }
1078 }
1079
1080 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle ) const
1081 {
1082     cairo_set_fill_rule(m_pathContext,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1083     return cairo_in_fill( m_pathContext, x, y) != 0;
1084 }
1085
1086 //-----------------------------------------------------------------------------
1087 // wxCairoMatrixData implementation
1088 //-----------------------------------------------------------------------------
1089
1090 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
1091     : wxGraphicsMatrixData(renderer)
1092 {
1093     if ( matrix )
1094         m_matrix = *matrix;
1095 }
1096
1097 wxCairoMatrixData::~wxCairoMatrixData()
1098 {
1099     // nothing to do
1100 }
1101
1102 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
1103 {
1104     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
1105 }
1106
1107 // concatenates the matrix
1108 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
1109 {
1110     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
1111 }
1112
1113 // sets the matrix to the respective values
1114 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1115                         wxDouble tx, wxDouble ty)
1116 {
1117     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
1118 }
1119
1120 // gets the component valuess of the matrix
1121 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
1122                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
1123 {
1124     if (a)  *a = m_matrix.xx;
1125     if (b)  *b = m_matrix.yx;
1126     if (c)  *c = m_matrix.xy;
1127     if (d)  *d = m_matrix.yy;
1128     if (tx) *tx= m_matrix.x0;
1129     if (ty) *ty= m_matrix.y0;
1130 }
1131
1132 // makes this the inverse matrix
1133 void wxCairoMatrixData::Invert()
1134 {
1135     cairo_matrix_invert( &m_matrix );
1136 }
1137
1138 // returns true if the elements of the transformation matrix are equal ?
1139 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
1140 {
1141     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
1142     return (
1143         m_matrix.xx == tm->xx &&
1144         m_matrix.yx == tm->yx &&
1145         m_matrix.xy == tm->xy &&
1146         m_matrix.yy == tm->yy &&
1147         m_matrix.x0 == tm->x0 &&
1148         m_matrix.y0 == tm->y0 ) ;
1149 }
1150
1151 // return true if this is the identity matrix
1152 bool wxCairoMatrixData::IsIdentity() const
1153 {
1154     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
1155         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
1156 }
1157
1158 //
1159 // transformation
1160 //
1161
1162 // add the translation to this matrix
1163 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
1164 {
1165     cairo_matrix_translate( &m_matrix, dx, dy) ;
1166 }
1167
1168 // add the scale to this matrix
1169 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
1170 {
1171     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
1172 }
1173
1174 // add the rotation to this matrix (radians)
1175 void wxCairoMatrixData::Rotate( wxDouble angle )
1176 {
1177     cairo_matrix_rotate( &m_matrix, angle) ;
1178 }
1179
1180 //
1181 // apply the transforms
1182 //
1183
1184 // applies that matrix to the point
1185 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
1186 {
1187     double lx = *x, ly = *y ;
1188     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
1189     *x = lx;
1190     *y = ly;
1191 }
1192
1193 // applies the matrix except for translations
1194 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1195 {
1196     double lx = *dx, ly = *dy ;
1197     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1198     *dx = lx;
1199     *dy = ly;
1200 }
1201
1202 // returns the native representation
1203 void * wxCairoMatrixData::GetNativeMatrix() const
1204 {
1205     return (void*) &m_matrix;
1206 }
1207
1208 // ----------------------------------------------------------------------------
1209 // wxCairoBitmap implementation
1210 // ----------------------------------------------------------------------------
1211
1212 int wxCairoBitmapData::InitBuffer(int width, int height, cairo_format_t format)
1213 {
1214     wxUnusedVar(format); // Only really unused with Cairo < 1.6.
1215
1216     // Determine the stride: use cairo_format_stride_for_width() if available
1217     // but fall back to 4*width for the earlier versions as this is what that
1218     // function always returns, even in latest Cairo, anyhow.
1219     int stride;
1220 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 6, 0)
1221     if ( cairo_version() >= CAIRO_VERSION_ENCODE(1, 6, 0) )
1222     {
1223         stride = cairo_format_stride_for_width(format, width);
1224
1225         // All our code would totally break if stride were not a multiple of 4
1226         // so ensure this is the case.
1227         if ( stride % 4 )
1228         {
1229             wxFAIL_MSG("Unexpected Cairo image surface stride.");
1230
1231             stride += 4 - stride % 4;
1232         }
1233     }
1234     else
1235 #endif
1236         stride = 4*width;
1237
1238     m_width = width;
1239     m_height = height;
1240     m_buffer = new unsigned char[height*stride];
1241
1242     return stride;
1243 }
1244
1245 void wxCairoBitmapData::InitSurface(cairo_format_t format, int stride)
1246 {
1247     m_surface = cairo_image_surface_create_for_data(
1248                             m_buffer, format, m_width, m_height, stride);
1249     m_pattern = cairo_pattern_create_for_surface(m_surface);
1250 }
1251
1252 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap ) :
1253     wxGraphicsObjectRefData( renderer )
1254 {
1255     m_surface = bitmap;
1256     m_pattern = cairo_pattern_create_for_surface(m_surface);
1257 }
1258
1259 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp ) : wxGraphicsObjectRefData( renderer )
1260 {
1261     wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1262
1263 #ifdef wxHAS_RAW_BITMAP
1264     // Create a surface object and copy the bitmap pixel data to it.  if the
1265     // image has alpha (or a mask represented as alpha) then we'll use a
1266     // different format and iterator than if it doesn't...
1267     cairo_format_t bufferFormat = bmp.GetDepth() == 32
1268 #ifdef __WXGTK__
1269                                             || bmp.GetMask()
1270 #endif
1271                                         ? CAIRO_FORMAT_ARGB32
1272                                         : CAIRO_FORMAT_RGB24;
1273
1274     int stride = InitBuffer(bmp.GetWidth(), bmp.GetHeight(), bufferFormat);
1275
1276     wxBitmap bmpSource = bmp;  // we need a non-const instance
1277     wxUint32* data = (wxUint32*)m_buffer;
1278
1279     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1280     {
1281         // use the bitmap's alpha
1282         wxAlphaPixelData
1283             pixData(bmpSource, wxPoint(0, 0), wxSize(m_width, m_height));
1284         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1285
1286         wxAlphaPixelData::Iterator p(pixData);
1287         for (int y=0; y<m_height; y++)
1288         {
1289             wxAlphaPixelData::Iterator rowStart = p;
1290             wxUint32* const rowStartDst = data;
1291             for (int x=0; x<m_width; x++)
1292             {
1293                 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1294                 // with alpha in the upper 8 bits, then red, then green, then
1295                 // blue. The 32-bit quantities are stored native-endian.
1296                 // Pre-multiplied alpha is used.
1297                 unsigned char alpha = p.Alpha();
1298                 if (alpha == 0)
1299                     *data = 0;
1300                 else
1301                     *data = ( alpha                      << 24
1302                               | (p.Red() * alpha/255)    << 16
1303                               | (p.Green() * alpha/255)  <<  8
1304                               | (p.Blue() * alpha/255) );
1305                 ++data;
1306                 ++p;
1307             }
1308
1309             data = rowStartDst + stride / 4;
1310             p = rowStart;
1311             p.OffsetY(pixData, 1);
1312         }
1313     }
1314     else  // no alpha
1315     {
1316         wxNativePixelData
1317             pixData(bmpSource, wxPoint(0, 0), wxSize(m_width, m_height));
1318         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1319
1320         wxNativePixelData::Iterator p(pixData);
1321         for (int y=0; y<m_height; y++)
1322         {
1323             wxNativePixelData::Iterator rowStart = p;
1324             wxUint32* const rowStartDst = data;
1325             for (int x=0; x<m_width; x++)
1326             {
1327                 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1328                 // the upper 8 bits unused. Red, Green, and Blue are stored in
1329                 // the remaining 24 bits in that order.  The 32-bit quantities
1330                 // are stored native-endian.
1331                 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1332                 ++data;
1333                 ++p;
1334             }
1335
1336             data = rowStartDst + stride / 4;
1337             p = rowStart;
1338             p.OffsetY(pixData, 1);
1339         }
1340     }
1341 #ifdef __WXMSW__
1342     // if there is a mask, set the alpha bytes in the target buffer to
1343     // fully transparent or fully opaque
1344     if (bmpSource.GetMask())
1345     {
1346         wxBitmap bmpMask = bmpSource.GetMaskBitmap();
1347         bufferFormat = CAIRO_FORMAT_ARGB32;
1348         data = (wxUint32*)m_buffer;
1349         wxNativePixelData
1350             pixData(bmpMask, wxPoint(0, 0), wxSize(m_width, m_height));
1351         wxCHECK_RET( pixData, wxT("Failed to gain raw access to mask data."));
1352
1353         wxNativePixelData::Iterator p(pixData);
1354         for (int y=0; y<m_height; y++)
1355         {
1356             wxNativePixelData::Iterator rowStart = p;
1357             wxUint32* const rowStartDst = data;
1358             for (int x=0; x<m_width; x++)
1359             {
1360                 if (p.Red()+p.Green()+p.Blue() == 0)
1361                     *data = 0;
1362                 else
1363                     *data = (wxALPHA_OPAQUE << 24) | (*data & 0x00FFFFFF);
1364                 ++data;
1365                 ++p;
1366             }
1367
1368             data = rowStartDst + stride / 4;
1369             p = rowStart;
1370             p.OffsetY(pixData, 1);
1371         }
1372     }
1373 #endif
1374
1375     InitSurface(bufferFormat, stride);
1376 #endif // wxHAS_RAW_BITMAP
1377 }
1378
1379 #if wxUSE_IMAGE
1380
1381 // Helper functions for dealing with alpha pre-multiplication.
1382 namespace
1383 {
1384
1385 inline unsigned char Premultiply(unsigned char alpha, unsigned char data)
1386 {
1387     return alpha ? (data * alpha)/0xff : data;
1388 }
1389
1390 inline unsigned char Unpremultiply(unsigned char alpha, unsigned char data)
1391 {
1392     return alpha ? (data * 0xff)/alpha : data;
1393 }
1394
1395 } // anonymous namespace
1396
1397 wxCairoBitmapData::wxCairoBitmapData(wxGraphicsRenderer* renderer,
1398                                      const wxImage& image)
1399     : wxGraphicsObjectRefData(renderer)
1400 {
1401     const cairo_format_t bufferFormat = image.HasAlpha()
1402                                             ? CAIRO_FORMAT_ARGB32
1403                                             : CAIRO_FORMAT_RGB24;
1404
1405     int stride = InitBuffer(image.GetWidth(), image.GetHeight(), bufferFormat);
1406
1407     // Copy wxImage data into the buffer. Notice that we work with wxUint32
1408     // values and not bytes becase Cairo always works with buffers in native
1409     // endianness.
1410     wxUint32* dst = reinterpret_cast<wxUint32*>(m_buffer);
1411     const unsigned char* src = image.GetData();
1412
1413     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1414     {
1415         const unsigned char* alpha = image.GetAlpha();
1416
1417         for ( int y = 0; y < m_height; y++ )
1418         {
1419             wxUint32* const rowStartDst = dst;
1420
1421             for ( int x = 0; x < m_width; x++ )
1422             {
1423                 const unsigned char a = *alpha++;
1424
1425                 *dst++ = a                      << 24 |
1426                          Premultiply(a, src[0]) << 16 |
1427                          Premultiply(a, src[1]) <<  8 |
1428                          Premultiply(a, src[2]);
1429                 src += 3;
1430             }
1431
1432             dst = rowStartDst + stride / 4;
1433         }
1434     }
1435     else // RGB
1436     {
1437         for ( int y = 0; y < m_height; y++ )
1438         {
1439             wxUint32* const rowStartDst = dst;
1440
1441             for ( int x = 0; x < m_width; x++ )
1442             {
1443                 *dst++ = src[0] << 16 |
1444                          src[1] <<  8 |
1445                          src[2];
1446                 src += 3;
1447             }
1448
1449             dst = rowStartDst + stride / 4;
1450         }
1451     }
1452
1453     InitSurface(bufferFormat, stride);
1454 }
1455
1456 wxImage wxCairoBitmapData::ConvertToImage() const
1457 {
1458     wxImage image(m_width, m_height, false /* don't clear */);
1459
1460     // Get the surface type and format.
1461     wxCHECK_MSG( cairo_surface_get_type(m_surface) == CAIRO_SURFACE_TYPE_IMAGE,
1462                  wxNullImage,
1463                  wxS("Can't convert non-image surface to image.") );
1464
1465     switch ( cairo_image_surface_get_format(m_surface) )
1466     {
1467         case CAIRO_FORMAT_ARGB32:
1468             image.SetAlpha();
1469             break;
1470
1471         case CAIRO_FORMAT_RGB24:
1472             // Nothing to do, we don't use alpha by default.
1473             break;
1474
1475         case CAIRO_FORMAT_A8:
1476         case CAIRO_FORMAT_A1:
1477             wxFAIL_MSG(wxS("Unsupported Cairo image surface type."));
1478             return wxNullImage;
1479
1480         default:
1481             wxFAIL_MSG(wxS("Unknown Cairo image surface type."));
1482             return wxNullImage;
1483     }
1484
1485     // Prepare for copying data.
1486     const wxUint32* src = (wxUint32*)cairo_image_surface_get_data(m_surface);
1487     wxCHECK_MSG( src, wxNullImage, wxS("Failed to get Cairo surface data.") );
1488
1489     int stride = cairo_image_surface_get_stride(m_surface);
1490     wxCHECK_MSG( stride > 0, wxNullImage,
1491                  wxS("Failed to get Cairo surface stride.") );
1492
1493     // As we work with wxUint32 pointers and not char ones, we need to adjust
1494     // the stride accordingly. This should be lossless as the stride must be a
1495     // multiple of pixel size.
1496     wxASSERT_MSG( !(stride % sizeof(wxUint32)), wxS("Unexpected stride.") );
1497     stride /= sizeof(wxUint32);
1498
1499     unsigned char* dst = image.GetData();
1500     unsigned char *alpha = image.GetAlpha();
1501     if ( alpha )
1502     {
1503         // We need to also copy alpha and undo the pre-multiplication as Cairo
1504         // stores pre-multiplied values in this format while wxImage does not.
1505         for ( int y = 0; y < m_height; y++ )
1506         {
1507             const wxUint32* const rowStart = src;
1508             for ( int x = 0; x < m_width; x++ )
1509             {
1510                 const wxUint32 argb = *src++;
1511
1512                 *alpha++ = (argb & 0xff000000) >> 24;
1513
1514                 // Copy the RGB data undoing the pre-multiplication.
1515                 *dst++ = Unpremultiply(*alpha, (argb & 0x00ff0000) >> 16);
1516                 *dst++ = Unpremultiply(*alpha, (argb & 0x0000ff00) >>  8);
1517                 *dst++ = Unpremultiply(*alpha, (argb & 0x000000ff));
1518             }
1519
1520             src = rowStart + stride;
1521         }
1522     }
1523     else // RGB
1524     {
1525         // Things are pretty simple in this case, just copy RGB bytes.
1526         for ( int y = 0; y < m_height; y++ )
1527         {
1528             const wxUint32* const rowStart = src;
1529             for ( int x = 0; x < m_width; x++ )
1530             {
1531                 const wxUint32 argb = *src++;
1532
1533                 *dst++ = (argb & 0x00ff0000) >> 16;
1534                 *dst++ = (argb & 0x0000ff00) >>  8;
1535                 *dst++ = (argb & 0x000000ff);
1536             }
1537
1538             src = rowStart + stride;
1539         }
1540     }
1541
1542     return image;
1543 }
1544
1545 #endif // wxUSE_IMAGE
1546
1547 wxCairoBitmapData::~wxCairoBitmapData()
1548 {
1549     if (m_pattern)
1550         cairo_pattern_destroy(m_pattern);
1551
1552     if (m_surface)
1553         cairo_surface_destroy(m_surface);
1554
1555     delete [] m_buffer;
1556 }
1557
1558 //-----------------------------------------------------------------------------
1559 // wxCairoContext implementation
1560 //-----------------------------------------------------------------------------
1561
1562 class wxCairoOffsetHelper
1563 {
1564 public :
1565     wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1566     {
1567         m_ctx = ctx;
1568         m_offset = offset;
1569         if ( m_offset )
1570              cairo_translate( m_ctx, 0.5, 0.5 );
1571     }
1572     ~wxCairoOffsetHelper( )
1573     {
1574         if ( m_offset )
1575             cairo_translate( m_ctx, -0.5, -0.5 );
1576     }
1577 public :
1578     cairo_t* m_ctx;
1579     bool m_offset;
1580 } ;
1581
1582 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1583 : wxGraphicsContext(renderer)
1584 {
1585 #ifdef __WXMSW__
1586     // wxMSW contexts always use MM_ANISOTROPIC, which messes up
1587     // text rendering when printing using Cairo. Switch it to MM_TEXT
1588     // map mode to avoid this problem.
1589     HDC hdc = (HDC)dc.GetHDC();
1590     ::SetMapMode(hdc, MM_TEXT);
1591     m_mswSurface = cairo_win32_printing_surface_create(hdc);
1592     Init( cairo_create(m_mswSurface) );
1593 #endif
1594
1595 #ifdef __WXGTK20__
1596     const wxDCImpl *impl = dc.GetImpl();
1597     Init( (cairo_t*) impl->GetCairoContext() );
1598 #endif
1599     wxSize sz = dc.GetSize();
1600     m_width = sz.x;
1601     m_height = sz.y;
1602
1603     wxPoint org = dc.GetDeviceOrigin();
1604     cairo_translate( m_context, org.x, org.y );
1605
1606     double sx,sy;
1607     dc.GetUserScale( &sx, &sy );
1608
1609 // TODO: Determine if these fixes are needed on other platforms too.
1610 // On MSW, without this the printer context will not respect wxDC SetMapMode calls.
1611 // For example, using dc.SetMapMode(wxMM_POINTS) can let us share printer and screen
1612 // drawing code
1613 #ifdef __WXMSW__
1614     double lsx,lsy;
1615     dc.GetLogicalScale( &lsx, &lsy );
1616     sx *= lsx;
1617     sy *= lsy;
1618 #endif
1619     cairo_scale( m_context, sx, sy );
1620
1621     org = dc.GetLogicalOrigin();
1622     cairo_translate( m_context, -org.x, -org.y );
1623 }
1624
1625 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1626 : wxGraphicsContext(renderer)
1627 {
1628     int width, height;
1629     dc.GetSize( &width, &height );
1630     m_width = width;
1631     m_height = height;
1632
1633     m_enableOffset = true;
1634
1635 #ifdef __WXMSW__
1636     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1637     Init( cairo_create(m_mswSurface) );
1638 #endif
1639
1640 #ifdef __WXGTK20__
1641     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1642     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1643
1644 #if 0
1645     wxGraphicsMatrix matrix = CreateMatrix();
1646
1647     wxPoint org = dc.GetDeviceOrigin();
1648     matrix.Translate( org.x, org.y );
1649
1650     org = dc.GetLogicalOrigin();
1651     matrix.Translate( -org.x, -org.y );
1652
1653     double sx,sy;
1654     dc.GetUserScale( &sx, &sy );
1655     matrix.Scale( sx, sy );
1656
1657     ConcatTransform( matrix );
1658 #endif
1659 #endif
1660
1661 #ifdef __WXMAC__
1662     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1663     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1664     Init( cairo_create( surface ) );
1665     cairo_surface_destroy( surface );
1666 #endif
1667 }
1668
1669 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1670 : wxGraphicsContext(renderer)
1671 {
1672     int width, height;
1673     dc.GetSize( &width, &height );
1674     m_width = width;
1675     m_height = height;
1676
1677     m_enableOffset = true;
1678
1679 #ifdef __WXMSW__
1680     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1681     Init( cairo_create(m_mswSurface) );
1682 #endif
1683
1684 #ifdef __WXGTK20__
1685     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1686     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1687
1688 #if 0
1689     wxGraphicsMatrix matrix = CreateMatrix();
1690
1691     wxPoint org = dc.GetDeviceOrigin();
1692     matrix.Translate( org.x, org.y );
1693
1694     org = dc.GetLogicalOrigin();
1695     matrix.Translate( -org.x, -org.y );
1696
1697     double sx,sy;
1698     dc.GetUserScale( &sx, &sy );
1699     matrix.Scale( sx, sy );
1700
1701     ConcatTransform( matrix );
1702 #endif
1703 #endif
1704
1705 #ifdef __WXMAC__
1706     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1707     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1708     Init( cairo_create( surface ) );
1709     cairo_surface_destroy( surface );
1710 #endif
1711 }
1712
1713 #ifdef __WXGTK20__
1714 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
1715 : wxGraphicsContext(renderer)
1716 {
1717     Init( gdk_cairo_create( drawable ) );
1718
1719     int width, height;
1720     gdk_drawable_get_size( drawable, &width, &height );
1721     m_width = width;
1722     m_height = height;
1723 }
1724 #endif
1725
1726 #ifdef __WXMSW__
1727 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, HDC handle )
1728 : wxGraphicsContext(renderer)
1729 {
1730     m_mswSurface = cairo_win32_surface_create(handle);
1731     Init( cairo_create(m_mswSurface) );
1732     m_width =
1733     m_height = 0;
1734 }
1735 #endif
1736
1737
1738 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1739 : wxGraphicsContext(renderer)
1740 {
1741     Init( context );
1742     m_width =
1743     m_height = 0;
1744 }
1745
1746 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1747 : wxGraphicsContext(renderer)
1748 {
1749     m_enableOffset = true;
1750 #ifdef __WXGTK__
1751     // something along these lines (copied from dcclient)
1752
1753     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1754     // code should still be able to create wxClientDCs for them, so we will
1755     // use the parent window here then.
1756     if (window->m_wxwindow == NULL)
1757     {
1758         window = window->GetParent();
1759     }
1760
1761     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1762
1763     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1764
1765     wxSize sz = window->GetSize();
1766     m_width = sz.x;
1767     m_height = sz.y;
1768 #endif
1769
1770 #ifdef __WXMSW__
1771     m_mswSurface = cairo_win32_surface_create((HDC)window->GetHandle());
1772     Init(cairo_create(m_mswSurface));
1773 #endif
1774
1775 }
1776
1777 wxCairoContext::wxCairoContext(wxGraphicsRenderer* renderer) :
1778     wxGraphicsContext(renderer)
1779 {
1780     m_context = NULL;
1781 }
1782
1783 wxCairoContext::~wxCairoContext()
1784 {
1785     if ( m_context )
1786     {
1787         PopState();
1788         PopState();
1789         cairo_destroy(m_context);
1790     }
1791 #ifdef __WXMSW__
1792     if ( m_mswSurface )
1793         cairo_surface_destroy(m_mswSurface);
1794 #endif
1795 }
1796
1797 void wxCairoContext::Init(cairo_t *context)
1798 {
1799     m_context = context ;
1800     PushState();
1801     PushState();
1802 }
1803
1804
1805 void wxCairoContext::Clip( const wxRegion& region )
1806 {
1807     // Create a path with all the rectangles in the region
1808     wxGraphicsPath path = GetRenderer()->CreatePath();
1809     wxRegionIterator ri(region);
1810     while (ri)
1811     {
1812         path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1813         ++ri;
1814     }
1815
1816     // Put it in the context
1817     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1818     cairo_append_path(m_context, cp);
1819
1820     // clip to that path
1821     cairo_clip(m_context);
1822     path.UnGetNativePath(cp);
1823 }
1824
1825 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1826 {
1827     // Create a path with this rectangle
1828     wxGraphicsPath path = GetRenderer()->CreatePath();
1829     path.AddRectangle(x,y,w,h);
1830
1831     // Put it in the context
1832     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1833     cairo_append_path(m_context, cp);
1834
1835     // clip to that path
1836     cairo_clip(m_context);
1837     path.UnGetNativePath(cp);
1838 }
1839
1840 void wxCairoContext::ResetClip()
1841 {
1842     cairo_reset_clip(m_context);
1843 }
1844
1845
1846 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1847 {
1848     if ( !m_pen.IsNull() )
1849     {
1850         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1851         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1852         cairo_append_path(m_context,cp);
1853         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1854         cairo_stroke(m_context);
1855         path.UnGetNativePath(cp);
1856     }
1857 }
1858
1859 void wxCairoContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1860 {
1861     if ( !m_brush.IsNull() )
1862     {
1863         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1864         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1865         cairo_append_path(m_context,cp);
1866         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1867         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1868         cairo_fill(m_context);
1869         path.UnGetNativePath(cp);
1870     }
1871 }
1872
1873 void wxCairoContext::Rotate( wxDouble angle )
1874 {
1875     cairo_rotate(m_context,angle);
1876 }
1877
1878 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1879 {
1880     cairo_translate(m_context,dx,dy);
1881 }
1882
1883 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1884 {
1885     cairo_scale(m_context,xScale,yScale);
1886 }
1887
1888 // concatenates this transform with the current transform of this context
1889 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1890 {
1891     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1892 }
1893
1894 // sets the transform of this context
1895 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1896 {
1897     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1898 }
1899
1900 // gets the matrix of this context
1901 wxGraphicsMatrix wxCairoContext::GetTransform() const
1902 {
1903     wxGraphicsMatrix matrix = CreateMatrix();
1904     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1905     return matrix;
1906 }
1907
1908
1909
1910 void wxCairoContext::PushState()
1911 {
1912     cairo_save(m_context);
1913 }
1914
1915 void wxCairoContext::PopState()
1916 {
1917     cairo_restore(m_context);
1918 }
1919
1920 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1921 {
1922     wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp);
1923     DrawBitmap(bitmap, x, y, w, h);
1924
1925 }
1926
1927 void wxCairoContext::DrawBitmap(const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1928 {
1929     PushState();
1930
1931     // In case we're scaling the image by using a width and height different
1932     // than the bitmap's size create a pattern transformation on the surface and
1933     // draw the transformed pattern.
1934     wxCairoBitmapData* data = static_cast<wxCairoBitmapData*>(bmp.GetRefData());
1935     cairo_pattern_t* pattern = data->GetCairoPattern();
1936     wxSize size = data->GetSize();
1937
1938     wxDouble scaleX = w / size.GetWidth();
1939     wxDouble scaleY = h / size.GetHeight();
1940
1941     // prepare to draw the image
1942     cairo_translate(m_context, x, y);
1943     cairo_scale(m_context, scaleX, scaleY);
1944     cairo_set_source(m_context, pattern);
1945     // use the original size here since the context is scaled already...
1946     cairo_rectangle(m_context, 0, 0, size.GetWidth(), size.GetHeight());
1947     // fill the rectangle using the pattern
1948     cairo_fill(m_context);
1949
1950     PopState();
1951 }
1952
1953 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1954 {
1955     // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
1956     // start using the Cairo backend on other platforms then we may need to
1957     // fiddle with this...
1958     DrawBitmap(icon, x, y, w, h);
1959 }
1960
1961
1962 void wxCairoContext::DoDrawText(const wxString& str, wxDouble x, wxDouble y)
1963 {
1964     wxCHECK_RET( !m_font.IsNull(),
1965                  wxT("wxCairoContext::DrawText - no valid font set") );
1966
1967     if ( str.empty())
1968         return;
1969
1970     const wxCharBuffer data = str.utf8_str();
1971     if ( !data )
1972         return;
1973
1974     if ( ((wxCairoFontData*)m_font.GetRefData())->Apply(this) )
1975     {
1976 #ifdef __WXGTK__
1977         PangoLayout *layout = pango_cairo_create_layout (m_context);
1978         const wxFont& font = static_cast<wxCairoFontData*>(m_font.GetRefData())->GetFont();
1979         pango_layout_set_font_description(layout, font.GetNativeFontInfo()->description);
1980         pango_layout_set_text(layout, data, data.length());
1981         font.GTKSetPangoAttrs(layout);
1982
1983         cairo_move_to(m_context, x, y);
1984         pango_cairo_show_layout (m_context, layout);
1985
1986         g_object_unref (layout);
1987
1988         // Don't use Cairo text API, we already did everything.
1989         return;
1990 #endif
1991     }
1992
1993     // Cairo's x,y for drawing text is at the baseline, so we need to adjust
1994     // the position we move to by the ascent.
1995     cairo_font_extents_t fe;
1996     cairo_font_extents(m_context, &fe);
1997     cairo_move_to(m_context, x, y+fe.ascent);
1998
1999     cairo_show_text(m_context, data);
2000 }
2001
2002 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
2003                                     wxDouble *descent, wxDouble *externalLeading ) const
2004 {
2005     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
2006
2007     if ( width )
2008         *width = 0;
2009     if ( height )
2010         *height = 0;
2011     if ( descent )
2012         *descent = 0;
2013     if ( externalLeading )
2014         *externalLeading = 0;
2015
2016     if ( str.empty())
2017         return;
2018
2019     if ( ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this) )
2020     {
2021 #ifdef __WXGTK__
2022         int w, h;
2023
2024         PangoLayout *layout = pango_cairo_create_layout (m_context);
2025         const wxFont& font = static_cast<wxCairoFontData*>(m_font.GetRefData())->GetFont();
2026         pango_layout_set_font_description(layout, font.GetNativeFontInfo()->description);
2027         const wxCharBuffer data = str.utf8_str();
2028         if ( !data )
2029         {
2030             return;
2031         }
2032         pango_layout_set_text(layout, data, data.length());
2033         pango_layout_get_pixel_size (layout, &w, &h);
2034         if ( width )
2035             *width = w;
2036         if ( height )
2037             *height = h;
2038         if (descent)
2039         {
2040             PangoLayoutIter *iter = pango_layout_get_iter(layout);
2041             int baseline = pango_layout_iter_get_baseline(iter);
2042             pango_layout_iter_free(iter);
2043             *descent = h - PANGO_PIXELS(baseline);
2044         }
2045         g_object_unref (layout);
2046         return;
2047 #endif
2048     }
2049
2050     if (width)
2051     {
2052         const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
2053         cairo_text_extents_t te;
2054         cairo_text_extents(m_context, buf, &te);
2055         *width = te.width;
2056     }
2057
2058     if (height || descent || externalLeading)
2059     {
2060         cairo_font_extents_t fe;
2061         cairo_font_extents(m_context, &fe);
2062
2063         // some backends have negative descents
2064
2065         if ( fe.descent < 0 )
2066             fe.descent = -fe.descent;
2067
2068         if ( fe.height < (fe.ascent + fe.descent ) )
2069         {
2070             // some backends are broken re height ... (eg currently ATSUI)
2071             fe.height = fe.ascent + fe.descent;
2072         }
2073
2074         if (height)
2075             *height = fe.height;
2076         if ( descent )
2077             *descent = fe.descent;
2078         if ( externalLeading )
2079             *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
2080     }
2081 }
2082
2083 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
2084 {
2085     widths.Empty();
2086     widths.Add(0, text.length());
2087
2088     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
2089
2090     if (text.empty())
2091         return;
2092
2093     // TODO
2094 }
2095
2096 void * wxCairoContext::GetNativeContext()
2097 {
2098     return m_context;
2099 }
2100
2101 bool wxCairoContext::SetAntialiasMode(wxAntialiasMode antialias)
2102 {
2103     if (m_antialias == antialias)
2104         return true;
2105
2106     m_antialias = antialias;
2107
2108     cairo_antialias_t antialiasMode;
2109     switch (antialias)
2110     {
2111         case wxANTIALIAS_DEFAULT:
2112             antialiasMode = CAIRO_ANTIALIAS_DEFAULT;
2113             break;
2114         case wxANTIALIAS_NONE:
2115             antialiasMode = CAIRO_ANTIALIAS_NONE;
2116             break;
2117         default:
2118             return false;
2119     }
2120     cairo_set_antialias(m_context, antialiasMode);
2121     return true;
2122 }
2123
2124 bool wxCairoContext::SetInterpolationQuality(wxInterpolationQuality WXUNUSED(interpolation))
2125 {
2126     // placeholder
2127     return false;
2128 }
2129
2130 bool wxCairoContext::SetCompositionMode(wxCompositionMode op)
2131 {
2132     if ( m_composition == op )
2133         return true;
2134
2135     m_composition = op;
2136     cairo_operator_t cop;
2137     switch (op)
2138     {
2139         case wxCOMPOSITION_CLEAR:
2140             cop = CAIRO_OPERATOR_CLEAR;
2141             break;
2142         case wxCOMPOSITION_SOURCE:
2143             cop = CAIRO_OPERATOR_SOURCE;
2144             break;
2145         case wxCOMPOSITION_OVER:
2146             cop = CAIRO_OPERATOR_OVER;
2147             break;
2148         case wxCOMPOSITION_IN:
2149             cop = CAIRO_OPERATOR_IN;
2150             break;
2151         case wxCOMPOSITION_OUT:
2152             cop = CAIRO_OPERATOR_OUT;
2153             break;
2154         case wxCOMPOSITION_ATOP:
2155             cop = CAIRO_OPERATOR_ATOP;
2156             break;
2157         case wxCOMPOSITION_DEST:
2158             cop = CAIRO_OPERATOR_DEST;
2159             break;
2160         case wxCOMPOSITION_DEST_OVER:
2161             cop = CAIRO_OPERATOR_DEST_OVER;
2162             break;
2163         case wxCOMPOSITION_DEST_IN:
2164             cop = CAIRO_OPERATOR_DEST_IN;
2165             break;
2166         case wxCOMPOSITION_DEST_OUT:
2167             cop = CAIRO_OPERATOR_DEST_OUT;
2168             break;
2169         case wxCOMPOSITION_DEST_ATOP:
2170             cop = CAIRO_OPERATOR_DEST_ATOP;
2171             break;
2172         case wxCOMPOSITION_XOR:
2173             cop = CAIRO_OPERATOR_XOR;
2174             break;
2175         case wxCOMPOSITION_ADD:
2176             cop = CAIRO_OPERATOR_ADD;
2177             break;
2178         default:
2179             return false;
2180     }
2181     cairo_set_operator(m_context, cop);
2182     return true;
2183 }
2184
2185 void wxCairoContext::BeginLayer(wxDouble opacity)
2186 {
2187     m_layerOpacities.push_back(opacity);
2188     cairo_push_group(m_context);
2189 }
2190
2191 void wxCairoContext::EndLayer()
2192 {
2193     float opacity = m_layerOpacities.back();
2194     m_layerOpacities.pop_back();
2195     cairo_pop_group_to_source(m_context);
2196     cairo_paint_with_alpha(m_context,opacity);
2197 }
2198
2199 //-----------------------------------------------------------------------------
2200 // wxCairoRenderer declaration
2201 //-----------------------------------------------------------------------------
2202
2203 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
2204 {
2205 public :
2206     wxCairoRenderer() {}
2207
2208     virtual ~wxCairoRenderer() {}
2209
2210     // Context
2211
2212     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
2213     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
2214     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
2215
2216     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
2217
2218     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
2219 #if wxUSE_IMAGE
2220     virtual wxGraphicsContext * CreateContextFromImage(wxImage& image);
2221 #endif // wxUSE_IMAGE
2222
2223     virtual wxGraphicsContext * CreateContext( wxWindow* window );
2224
2225     virtual wxGraphicsContext * CreateMeasuringContext();
2226 #ifdef __WXMSW__
2227 #if wxUSE_ENH_METAFILE
2228     virtual wxGraphicsContext * CreateContext( const wxEnhMetaFileDC& dc);
2229 #endif
2230 #endif
2231     // Path
2232
2233     virtual wxGraphicsPath CreatePath();
2234
2235     // Matrix
2236
2237     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
2238         wxDouble tx=0.0, wxDouble ty=0.0);
2239
2240
2241     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
2242
2243     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
2244
2245     virtual wxGraphicsBrush
2246     CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2247                               wxDouble x2, wxDouble y2,
2248                               const wxGraphicsGradientStops& stops);
2249
2250     virtual wxGraphicsBrush
2251     CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2252                               wxDouble xc, wxDouble yc,
2253                               wxDouble radius,
2254                               const wxGraphicsGradientStops& stops);
2255
2256     // sets the font
2257     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
2258     virtual wxGraphicsFont CreateFont(double sizeInPixels,
2259                                       const wxString& facename,
2260                                       int flags = wxFONTFLAG_DEFAULT,
2261                                       const wxColour& col = *wxBLACK);
2262
2263     // create a native bitmap representation
2264     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap );
2265 #if wxUSE_IMAGE
2266     virtual wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image);
2267     virtual wxImage CreateImageFromBitmap(const wxGraphicsBitmap& bmp);
2268 #endif // wxUSE_IMAGE
2269
2270     // create a graphics bitmap from a native bitmap
2271     virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
2272
2273     // create a subimage from a native image representation
2274     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  );
2275
2276 protected :
2277     bool EnsureIsLoaded();
2278     void Load();
2279     void Unload();
2280     friend class wxCairoModule;
2281 private :
2282     int m_loaded;
2283     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
2284 } ;
2285
2286 //-----------------------------------------------------------------------------
2287 // wxCairoRenderer implementation
2288 //-----------------------------------------------------------------------------
2289
2290 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
2291
2292 static wxCairoRenderer gs_cairoGraphicsRenderer;
2293 // temporary hack to allow creating a cairo context on any platform
2294 extern wxGraphicsRenderer* gCairoRenderer;
2295 wxGraphicsRenderer* gCairoRenderer = &gs_cairoGraphicsRenderer;
2296
2297 bool wxCairoRenderer::EnsureIsLoaded()
2298 {
2299 #ifndef __WXGTK__
2300     Load();
2301     return wxCairoInit();
2302 #else
2303     return true;
2304 #endif
2305 }
2306
2307 void wxCairoRenderer::Load()
2308 {
2309     wxCairoInit();
2310 }
2311
2312 void wxCairoRenderer::Unload()
2313 {
2314     wxCairoCleanUp();
2315 }
2316
2317 // call EnsureIsLoaded() and return returnOnFail value if it fails
2318 #define ENSURE_LOADED_OR_RETURN(returnOnFail)  \
2319     if ( !EnsureIsLoaded() )                   \
2320         return (returnOnFail)
2321
2322 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
2323 {
2324     ENSURE_LOADED_OR_RETURN(NULL);
2325     return new wxCairoContext(this,dc);
2326 }
2327
2328 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
2329 {
2330     ENSURE_LOADED_OR_RETURN(NULL);
2331     return new wxCairoContext(this,dc);
2332 }
2333
2334 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
2335 {
2336     ENSURE_LOADED_OR_RETURN(NULL);
2337     return new wxCairoContext(this, dc);
2338 }
2339
2340 #ifdef __WXMSW__
2341 #if wxUSE_ENH_METAFILE
2342 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxEnhMetaFileDC& WXUNUSED(dc) )
2343 {
2344     ENSURE_LOADED_OR_RETURN(NULL);
2345     return NULL;
2346 }
2347 #endif
2348 #endif
2349
2350 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
2351 {
2352     ENSURE_LOADED_OR_RETURN(NULL);
2353 #ifdef __WXMSW__
2354     return new wxCairoContext(this,(HDC)context);
2355 #else
2356     return new wxCairoContext(this,(cairo_t*)context);
2357 #endif
2358 }
2359
2360
2361 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
2362 {
2363     ENSURE_LOADED_OR_RETURN(NULL);
2364 #ifdef __WXGTK__
2365     return new wxCairoContext(this,(GdkDrawable*)window);
2366 #else
2367     wxUnusedVar(window);
2368     return NULL;
2369 #endif
2370 }
2371
2372 #if wxUSE_IMAGE
2373 wxGraphicsContext * wxCairoRenderer::CreateContextFromImage(wxImage& image)
2374 {
2375     return new wxCairoImageContext(this, image);
2376 }
2377 #endif // wxUSE_IMAGE
2378
2379 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
2380 {
2381     ENSURE_LOADED_OR_RETURN(NULL);
2382 #ifdef __WXGTK__
2383     return CreateContextFromNativeWindow(gdk_get_default_root_window());
2384 #endif
2385     return NULL;
2386     // TODO
2387 }
2388
2389 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
2390 {
2391     ENSURE_LOADED_OR_RETURN(NULL);
2392     return new wxCairoContext(this, window );
2393 }
2394
2395 // Path
2396
2397 wxGraphicsPath wxCairoRenderer::CreatePath()
2398 {
2399     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPath);
2400     wxGraphicsPath path;
2401     path.SetRefData( new wxCairoPathData(this) );
2402     return path;
2403 }
2404
2405
2406 // Matrix
2407
2408 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
2409                                                 wxDouble tx, wxDouble ty)
2410
2411 {
2412     ENSURE_LOADED_OR_RETURN(wxNullGraphicsMatrix);
2413     wxGraphicsMatrix m;
2414     wxCairoMatrixData* data = new wxCairoMatrixData( this );
2415     data->Set( a,b,c,d,tx,ty ) ;
2416     m.SetRefData(data);
2417     return m;
2418 }
2419
2420 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
2421 {
2422     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPen);
2423     if ( !pen.IsOk() || pen.GetStyle() == wxPENSTYLE_TRANSPARENT )
2424         return wxNullGraphicsPen;
2425     else
2426     {
2427         wxGraphicsPen p;
2428         p.SetRefData(new wxCairoPenData( this, pen ));
2429         return p;
2430     }
2431 }
2432
2433 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
2434 {
2435     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2436     if ( !brush.IsOk() || brush.GetStyle() == wxBRUSHSTYLE_TRANSPARENT )
2437         return wxNullGraphicsBrush;
2438     else
2439     {
2440         wxGraphicsBrush p;
2441         p.SetRefData(new wxCairoBrushData( this, brush ));
2442         return p;
2443     }
2444 }
2445
2446 wxGraphicsBrush
2447 wxCairoRenderer::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2448                                            wxDouble x2, wxDouble y2,
2449                                            const wxGraphicsGradientStops& stops)
2450 {
2451     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2452     wxGraphicsBrush p;
2453     wxCairoBrushData* d = new wxCairoBrushData( this );
2454     d->CreateLinearGradientBrush(x1, y1, x2, y2, stops);
2455     p.SetRefData(d);
2456     return p;
2457 }
2458
2459 wxGraphicsBrush
2460 wxCairoRenderer::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2461                                            wxDouble xc, wxDouble yc, wxDouble r,
2462                                            const wxGraphicsGradientStops& stops)
2463 {
2464     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2465     wxGraphicsBrush p;
2466     wxCairoBrushData* d = new wxCairoBrushData( this );
2467     d->CreateRadialGradientBrush(xo, yo, xc, yc, r, stops);
2468     p.SetRefData(d);
2469     return p;
2470 }
2471
2472 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
2473 {
2474     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
2475     if ( font.IsOk() )
2476     {
2477         wxGraphicsFont p;
2478         p.SetRefData(new wxCairoFontData( this , font, col ));
2479         return p;
2480     }
2481     else
2482         return wxNullGraphicsFont;
2483 }
2484
2485 wxGraphicsFont
2486 wxCairoRenderer::CreateFont(double sizeInPixels,
2487                             const wxString& facename,
2488                             int flags,
2489                             const wxColour& col)
2490 {
2491     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
2492
2493     wxGraphicsFont font;
2494     font.SetRefData(new wxCairoFontData(this, sizeInPixels, facename, flags, col));
2495     return font;
2496 }
2497
2498 wxGraphicsBitmap wxCairoRenderer::CreateBitmap( const wxBitmap& bmp )
2499 {
2500     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2501     if ( bmp.IsOk() )
2502     {
2503         wxGraphicsBitmap p;
2504         p.SetRefData(new wxCairoBitmapData( this , bmp ));
2505         return p;
2506     }
2507     else
2508         return wxNullGraphicsBitmap;
2509 }
2510
2511 #if wxUSE_IMAGE
2512
2513 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromImage(const wxImage& image)
2514 {
2515     wxGraphicsBitmap bmp;
2516
2517     ENSURE_LOADED_OR_RETURN(bmp);
2518
2519     if ( image.IsOk() )
2520     {
2521         bmp.SetRefData(new wxCairoBitmapData(this, image));
2522     }
2523
2524     return bmp;
2525 }
2526
2527 wxImage wxCairoRenderer::CreateImageFromBitmap(const wxGraphicsBitmap& bmp)
2528 {
2529     ENSURE_LOADED_OR_RETURN(wxNullImage);
2530
2531     const wxCairoBitmapData* const
2532         data = static_cast<wxCairoBitmapData*>(bmp.GetGraphicsData());
2533
2534     return data ? data->ConvertToImage() : wxNullImage;
2535 }
2536
2537 #endif // wxUSE_IMAGE
2538
2539
2540 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromNativeBitmap( void* bitmap )
2541 {
2542     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2543     if ( bitmap != NULL )
2544     {
2545         wxGraphicsBitmap p;
2546         p.SetRefData(new wxCairoBitmapData( this , (cairo_surface_t*) bitmap ));
2547         return p;
2548     }
2549     else
2550         return wxNullGraphicsBitmap;
2551 }
2552
2553 wxGraphicsBitmap
2554 wxCairoRenderer::CreateSubBitmap(const wxGraphicsBitmap& WXUNUSED(bitmap),
2555                                  wxDouble WXUNUSED(x),
2556                                  wxDouble WXUNUSED(y),
2557                                  wxDouble WXUNUSED(w),
2558                                  wxDouble WXUNUSED(h))
2559 {
2560     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2561     wxFAIL_MSG("wxCairoRenderer::CreateSubBitmap is not implemented.");
2562     return wxNullGraphicsBitmap;
2563 }
2564
2565 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2566 {
2567     return &gs_cairoGraphicsRenderer;
2568 }
2569
2570 #else // !wxUSE_CAIRO
2571
2572 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2573 {
2574     return NULL;
2575 }
2576
2577 #endif  // wxUSE_CAIRO/!wxUSE_CAIRO
2578
2579 // MSW and OS X have their own native default renderers, but the other ports
2580 // use Cairo by default
2581 #if !(defined(__WXMSW__) || defined(__WXOSX__))
2582 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
2583 {
2584     return GetCairoRenderer();
2585 }
2586 #endif // !(__WXMSW__ || __WXOSX__)
2587
2588 #endif // wxUSE_GRAPHICS_CONTEXT