src/generic/graphicc.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/graphicc.cpp
   3 // Purpose:     cairo device context class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     2006-10-03
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2006 Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #if wxUSE_GRAPHICS_CONTEXT
  19
  20 #include "wx/graphics.h"
  21
  22 #if wxUSE_CAIRO
  23
  24 // keep cairo.h from defining dllimport as we're defining the symbols inside
  25 // the wx dll in order to load them dynamically.
  26 #define cairo_public
  27
  28 #include "wx/cairo.h"
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/bitmap.h"
  32     #include "wx/icon.h"
  33     #include "wx/dcclient.h"
  34     #include "wx/dcmemory.h"
  35     #include "wx/dcprint.h"
  36     #ifdef __WXGTK__
  37         #include "wx/window.h"
  38     #endif
  39 #endif
  40
  41 #include "wx/private/graphics.h"
  42 #include "wx/rawbmp.h"
  43 #include "wx/vector.h"
  44
  45 using namespace std;
  46
  47 //-----------------------------------------------------------------------------
  48 // device context implementation
  49 //
  50 // more and more of the dc functionality should be implemented by calling
  51 // the appropricate wxCairoContext, but we will have to do that step by step
  52 // also coordinate conversions should be moved to native matrix ops
  53 //-----------------------------------------------------------------------------
  54
  55 // we always stock two context states, one at entry, to be able to preserve the
  56 // state we were called with, the other one after changing to HI Graphics orientation
  57 // (this one is used for getting back clippings etc)
  58
  59 //-----------------------------------------------------------------------------
  60 // wxGraphicsPath implementation
  61 //-----------------------------------------------------------------------------
  62
  63 // TODO remove this dependency (gdiplus needs the macros)
  64
  65 #ifndef max
  66 #define max(a,b)            (((a) > (b)) ? (a) : (b))
  67 #endif
  68
  69 #ifndef min
  70 #define min(a,b)            (((a) < (b)) ? (a) : (b))
  71 #endif
  72
  73 #include <cairo.h>
  74 #ifdef __WXMSW__
  75 #include <cairo-win32.h>
  76 #endif
  77
  78 #ifdef __WXGTK__
  79 #include <gtk/gtk.h>
  80 #include "wx/fontutil.h"
  81 #include "wx/gtk/dc.h"
  82 #endif
  83
  84 #ifdef __WXMSW__
  85 #include <cairo-win32.h>
  86 #endif
  87
  88 #ifdef __WXMAC__
  89 #include "wx/osx/private.h"
  90 #include <cairo-quartz.h>
  91 #include <cairo-atsui.h>
  92 #endif
  93
  94 class WXDLLIMPEXP_CORE wxCairoPathData : public wxGraphicsPathData
  95 {
  96 public :
  97     wxCairoPathData(wxGraphicsRenderer* renderer, cairo_t* path = NULL);
  98     ~wxCairoPathData();
  99
 100     virtual wxGraphicsObjectRefData *Clone() const;
 101
 102     //
 103     // These are the path primitives from which everything else can be constructed
 104     //
 105
 106     // begins a new subpath at (x,y)
 107     virtual void MoveToPoint( wxDouble x, wxDouble y );
 108
 109     // adds a straight line from the current point to (x,y)
 110     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 111
 112     // adds a cubic Bezier curve from the current point, using two control points and an end point
 113     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 114
 115
 116     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 117     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 118
 119     // gets the last point of the current path, (0,0) if not yet set
 120     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 121
 122     // adds another path
 123     virtual void AddPath( const wxGraphicsPathData* path );
 124
 125     // closes the current sub-path
 126     virtual void CloseSubpath();
 127
 128     //
 129     // These are convenience functions which - if not available natively will be assembled
 130     // using the primitives from above
 131     //
 132
 133     /*
 134
 135     // appends a rectangle as a new closed subpath
 136     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 137     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 138     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 139
 140     // draws a an arc to two tangents connecting (current) to (x1,y1) and (x1,y1) to (x2,y2), also a straight line from (current) to (x1,y1)
 141     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 142     */
 143
 144     // returns the native path
 145     virtual void * GetNativePath() const ;
 146
 147     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 148     virtual void UnGetNativePath(void *p) const;
 149
 150     // transforms each point of this path by the matrix
 151     virtual void Transform( const wxGraphicsMatrixData* matrix ) ;
 152
 153     // gets the bounding box enclosing all points (possibly including control points)
 154     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
 155
 156     virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxWINDING_RULE) const;
 157
 158 private :
 159     cairo_t* m_pathContext;
 160 };
 161
 162 class WXDLLIMPEXP_CORE wxCairoMatrixData : public wxGraphicsMatrixData
 163 {
 164 public :
 165     wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix = NULL ) ;
 166     virtual ~wxCairoMatrixData() ;
 167
 168     virtual wxGraphicsObjectRefData *Clone() const ;
 169
 170     // concatenates the matrix
 171     virtual void Concat( const wxGraphicsMatrixData *t );
 172
 173     // sets the matrix to the respective values
 174     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 175         wxDouble tx=0.0, wxDouble ty=0.0);
 176
 177     // gets the component valuess of the matrix
 178     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
 179                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
 180
 181     // makes this the inverse matrix
 182     virtual void Invert();
 183
 184     // returns true if the elements of the transformation matrix are equal ?
 185     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
 186
 187     // return true if this is the identity matrix
 188     virtual bool IsIdentity() const;
 189
 190     //
 191     // transformation
 192     //
 193
 194     // add the translation to this matrix
 195     virtual void Translate( wxDouble dx , wxDouble dy );
 196
 197     // add the scale to this matrix
 198     virtual void Scale( wxDouble xScale , wxDouble yScale );
 199
 200     // add the rotation to this matrix (radians)
 201     virtual void Rotate( wxDouble angle );
 202
 203     //
 204     // apply the transforms
 205     //
 206
 207     // applies that matrix to the point
 208     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 209
 210     // applies the matrix except for translations
 211     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 212
 213     // returns the native representation
 214     virtual void * GetNativeMatrix() const;
 215 private:
 216     cairo_matrix_t m_matrix ;
 217 } ;
 218
 219 class WXDLLIMPEXP_CORE wxCairoPenData : public wxGraphicsObjectRefData
 220 {
 221 public:
 222     wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 223     ~wxCairoPenData();
 224
 225     void Init();
 226
 227     virtual void Apply( wxGraphicsContext* context );
 228     virtual wxDouble GetWidth() { return m_width; }
 229
 230 private :
 231     double m_width;
 232
 233     double m_red;
 234     double m_green;
 235     double m_blue;
 236     double m_alpha;
 237
 238     cairo_line_cap_t m_cap;
 239     cairo_line_join_t m_join;
 240
 241     int m_count;
 242     const double *m_lengths;
 243     double *m_userLengths;
 244
 245     wxPen m_pen;
 246
 247     wxDECLARE_NO_COPY_CLASS(wxCairoPenData);
 248 };
 249
 250 class WXDLLIMPEXP_CORE wxCairoBrushData : public wxGraphicsObjectRefData
 251 {
 252 public:
 253     wxCairoBrushData( wxGraphicsRenderer* renderer );
 254     wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 255     ~wxCairoBrushData ();
 256
 257     virtual void Apply( wxGraphicsContext* context );
 258
 259     void CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 260                                    wxDouble x2, wxDouble y2,
 261                                    const wxGraphicsGradientStops& stops);
 262     void CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 263                                    wxDouble xc, wxDouble yc, wxDouble radius,
 264                                    const wxGraphicsGradientStops& stops);
 265
 266 protected:
 267     virtual void Init();
 268
 269     // common part of Create{Linear,Radial}GradientBrush()
 270     void AddGradientStops(const wxGraphicsGradientStops& stops);
 271
 272 private :
 273     double m_red;
 274     double m_green;
 275     double m_blue;
 276     double m_alpha;
 277
 278     cairo_pattern_t* m_brushPattern;
 279 };
 280
 281 class wxCairoFontData : public wxGraphicsObjectRefData
 282 {
 283 public:
 284     wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col );
 285     ~wxCairoFontData();
 286
 287     virtual void Apply( wxGraphicsContext* context );
 288 #ifdef __WXGTK__
 289     const PangoFontDescription* GetFont() const { return m_font; }
 290     bool GetUnderlined() const { return m_underlined; }
 291 #endif
 292 private :
 293     double m_size;
 294     bool m_underlined;
 295     double m_red;
 296     double m_green;
 297     double m_blue;
 298     double m_alpha;
 299 #ifdef __WXMAC__
 300     cairo_font_face_t *m_font;
 301 #elif defined(__WXGTK__)
 302     PangoFontDescription* m_font;
 303 #else
 304     wxCharBuffer m_fontName;
 305     cairo_font_slant_t m_slant;
 306     cairo_font_weight_t m_weight;
 307 #endif
 308 };
 309
 310 class wxCairoBitmapData : public wxGraphicsObjectRefData
 311 {
 312 public:
 313     wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp );
 314 #if wxUSE_IMAGE
 315     wxCairoBitmapData(wxGraphicsRenderer* renderer, const wxImage& image);
 316 #endif // wxUSE_IMAGE
 317     wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap );
 318     ~wxCairoBitmapData();
 319
 320     virtual cairo_surface_t* GetCairoSurface() { return m_surface; }
 321     virtual cairo_pattern_t* GetCairoPattern() { return m_pattern; }
 322     virtual wxSize GetSize() { return wxSize(m_width, m_height); }
 323
 324 #if wxUSE_IMAGE
 325     wxImage ConvertToImage() const;
 326 #endif // wxUSE_IMAGE
 327
 328 private :
 329     // Allocate m_buffer for the bitmap of the given size in the given format.
 330     //
 331     // Returns the stride used for the buffer.
 332     int InitBuffer(int width, int height, cairo_format_t format);
 333
 334     // Really create the surface using the buffer (which was supposed to be
 335     // filled since InitBuffer() call).
 336     void InitSurface(cairo_format_t format, int stride);
 337
 338
 339     cairo_surface_t* m_surface;
 340     cairo_pattern_t* m_pattern;
 341     int m_width;
 342     int m_height;
 343     unsigned char* m_buffer;
 344 };
 345
 346 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
 347 {
 348 public:
 349     wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc );
 350     wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc );
 351     wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc );
 352 #ifdef __WXGTK__
 353     wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable );
 354 #endif
 355 #ifdef __WXMSW__
 356     wxCairoContext( wxGraphicsRenderer* renderer, HDC context );
 357 #endif
 358     wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context );
 359     wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window);
 360
 361     // If this ctor is used, Init() must be called by the derived class later.
 362     wxCairoContext( wxGraphicsRenderer* renderer );
 363
 364     virtual ~wxCairoContext();
 365
 366     virtual bool ShouldOffset() const
 367     {
 368         if ( !m_enableOffset )
 369             return false;
 370
 371         int penwidth = 0 ;
 372         if ( !m_pen.IsNull() )
 373         {
 374             penwidth = (int)((wxCairoPenData*)m_pen.GetRefData())->GetWidth();
 375             if ( penwidth == 0 )
 376                 penwidth = 1;
 377         }
 378         return ( penwidth % 2 ) == 1;
 379     }
 380
 381     virtual void Clip( const wxRegion &region );
 382 #ifdef __WXMSW__
 383     cairo_surface_t* m_mswSurface;
 384 #endif
 385
 386     // clips drawings to the rect
 387     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 388
 389     // resets the clipping to original extent
 390     virtual void ResetClip();
 391
 392     virtual void * GetNativeContext();
 393
 394     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
 395
 396     virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation);
 397
 398     virtual bool SetCompositionMode(wxCompositionMode op);
 399
 400     virtual void BeginLayer(wxDouble opacity);
 401
 402     virtual void EndLayer();
 403
 404     virtual void StrokePath( const wxGraphicsPath& p );
 405     virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxWINDING_RULE );
 406
 407     virtual void Translate( wxDouble dx , wxDouble dy );
 408     virtual void Scale( wxDouble xScale , wxDouble yScale );
 409     virtual void Rotate( wxDouble angle );
 410
 411     // concatenates this transform with the current transform of this context
 412     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 413
 414     // sets the transform of this context
 415     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 416
 417     // gets the matrix of this context
 418     virtual wxGraphicsMatrix GetTransform() const;
 419
 420     virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 421     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 422     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 423     virtual void PushState();
 424     virtual void PopState();
 425
 426     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 427                                 wxDouble *descent, wxDouble *externalLeading ) const;
 428     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 429
 430 protected:
 431     virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
 432
 433     void Init(cairo_t *context);
 434
 435 private:
 436     cairo_t* m_context;
 437
 438     wxVector<float> m_layerOpacities;
 439
 440     wxDECLARE_NO_COPY_CLASS(wxCairoContext);
 441 };
 442
 443 #if wxUSE_IMAGE
 444 // ----------------------------------------------------------------------------
 445 // wxCairoImageContext: context associated with a wxImage.
 446 // ----------------------------------------------------------------------------
 447
 448 class wxCairoImageContext : public wxCairoContext
 449 {
 450 public:
 451     wxCairoImageContext(wxGraphicsRenderer* renderer, wxImage& image) :
 452         wxCairoContext(renderer),
 453         m_image(image),
 454         m_data(renderer, image)
 455     {
 456         Init(cairo_create(m_data.GetCairoSurface()));
 457     }
 458
 459     virtual ~wxCairoImageContext()
 460     {
 461         m_image = m_data.ConvertToImage();
 462     }
 463
 464 private:
 465     wxImage& m_image;
 466     wxCairoBitmapData m_data;
 467
 468     wxDECLARE_NO_COPY_CLASS(wxCairoImageContext);
 469 };
 470 #endif // wxUSE_IMAGE
 471
 472 //-----------------------------------------------------------------------------
 473 // wxCairoPenData implementation
 474 //-----------------------------------------------------------------------------
 475
 476 wxCairoPenData::~wxCairoPenData()
 477 {
 478     delete[] m_userLengths;
 479 }
 480
 481 void wxCairoPenData::Init()
 482 {
 483     m_lengths = NULL;
 484     m_userLengths = NULL;
 485     m_width = 0;
 486     m_count = 0;
 487 }
 488
 489 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 490 : wxGraphicsObjectRefData(renderer)
 491 {
 492     Init();
 493     m_pen = pen;
 494     m_width = m_pen.GetWidth();
 495     if (m_width <= 0.0)
 496         m_width = 0.1;
 497
 498     m_red = m_pen.GetColour().Red()/255.0;
 499     m_green = m_pen.GetColour().Green()/255.0;
 500     m_blue = m_pen.GetColour().Blue()/255.0;
 501     m_alpha = m_pen.GetColour().Alpha()/255.0;
 502
 503     switch ( m_pen.GetCap() )
 504     {
 505     case wxCAP_ROUND :
 506         m_cap = CAIRO_LINE_CAP_ROUND;
 507         break;
 508
 509     case wxCAP_PROJECTING :
 510         m_cap = CAIRO_LINE_CAP_SQUARE;
 511         break;
 512
 513     case wxCAP_BUTT :
 514         m_cap = CAIRO_LINE_CAP_BUTT;
 515         break;
 516
 517     default :
 518         m_cap = CAIRO_LINE_CAP_BUTT;
 519         break;
 520     }
 521
 522     switch ( m_pen.GetJoin() )
 523     {
 524     case wxJOIN_BEVEL :
 525         m_join = CAIRO_LINE_JOIN_BEVEL;
 526         break;
 527
 528     case wxJOIN_MITER :
 529         m_join = CAIRO_LINE_JOIN_MITER;
 530         break;
 531
 532     case wxJOIN_ROUND :
 533         m_join = CAIRO_LINE_JOIN_ROUND;
 534         break;
 535
 536     default :
 537         m_join = CAIRO_LINE_JOIN_MITER;
 538         break;
 539     }
 540
 541     const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
 542     const double dotted[] =
 543     {
 544         dashUnit , dashUnit + 2.0
 545     };
 546     static const double short_dashed[] =
 547     {
 548         9.0 , 6.0
 549     };
 550     static const double dashed[] =
 551     {
 552         19.0 , 9.0
 553     };
 554     static const double dotted_dashed[] =
 555     {
 556         9.0 , 6.0 , 3.0 , 3.0
 557     };
 558
 559     switch ( m_pen.GetStyle() )
 560     {
 561     case wxPENSTYLE_SOLID :
 562         break;
 563
 564     case wxPENSTYLE_DOT :
 565         m_count = WXSIZEOF(dotted);
 566         m_userLengths = new double[ m_count ] ;
 567         memcpy( m_userLengths, dotted, sizeof(dotted) );
 568         m_lengths = m_userLengths;
 569         break;
 570
 571     case wxPENSTYLE_LONG_DASH :
 572         m_lengths = dashed ;
 573         m_count = WXSIZEOF(dashed);
 574         break;
 575
 576     case wxPENSTYLE_SHORT_DASH :
 577         m_lengths = short_dashed ;
 578         m_count = WXSIZEOF(short_dashed);
 579         break;
 580
 581     case wxPENSTYLE_DOT_DASH :
 582         m_lengths = dotted_dashed ;
 583         m_count = WXSIZEOF(dotted_dashed);
 584         break;
 585
 586     case wxPENSTYLE_USER_DASH :
 587         {
 588             wxDash *wxdashes ;
 589             m_count = m_pen.GetDashes( &wxdashes ) ;
 590             if ((wxdashes != NULL) && (m_count > 0))
 591             {
 592                 m_userLengths = new double[m_count] ;
 593                 for ( int i = 0 ; i < m_count ; ++i )
 594                 {
 595                     m_userLengths[i] = wxdashes[i] * dashUnit ;
 596
 597                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 598                         m_userLengths[i] = dashUnit + 2.0 ;
 599                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 600                         m_userLengths[i] = dashUnit ;
 601                 }
 602             }
 603             m_lengths = m_userLengths ;
 604         }
 605         break;
 606     case wxPENSTYLE_STIPPLE :
 607         {
 608             /*
 609             wxBitmap* bmp = pen.GetStipple();
 610             if ( bmp && bmp->IsOk() )
 611             {
 612             wxDELETE( m_penImage );
 613             wxDELETE( m_penBrush );
 614             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 615             m_penBrush = new TextureBrush(m_penImage);
 616             m_pen->SetBrush( m_penBrush );
 617             }
 618             */
 619         }
 620         break;
 621     default :
 622         if ( m_pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH
 623             && m_pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
 624         {
 625             /*
 626             wxDELETE( m_penBrush );
 627             HatchStyle style = HatchStyleHorizontal;
 628             switch( pen.GetStyle() )
 629             {
 630             case wxPENSTYLE_BDIAGONAL_HATCH :
 631             style = HatchStyleBackwardDiagonal;
 632             break ;
 633             case wxPENSTYLE_CROSSDIAG_HATCH :
 634             style = HatchStyleDiagonalCross;
 635             break ;
 636             case wxPENSTYLE_FDIAGONAL_HATCH :
 637             style = HatchStyleForwardDiagonal;
 638             break ;
 639             case wxPENSTYLE_CROSS_HATCH :
 640             style = HatchStyleCross;
 641             break ;
 642             case wxPENSTYLE_HORIZONTAL_HATCH :
 643             style = HatchStyleHorizontal;
 644             break ;
 645             case wxPENSTYLE_VERTICAL_HATCH :
 646             style = HatchStyleVertical;
 647             break ;
 648
 649             }
 650             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 651             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 652             m_pen->SetBrush( m_penBrush )
 653             */
 654         }
 655         break;
 656     }
 657 }
 658
 659 void wxCairoPenData::Apply( wxGraphicsContext* context )
 660 {
 661     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 662     cairo_set_line_width(ctext,m_width);
 663     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 664     cairo_set_line_cap(ctext,m_cap);
 665     cairo_set_line_join(ctext,m_join);
 666     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 667 }
 668
 669 //-----------------------------------------------------------------------------
 670 // wxCairoBrushData implementation
 671 //-----------------------------------------------------------------------------
 672
 673 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 674   : wxGraphicsObjectRefData( renderer )
 675 {
 676     Init();
 677 }
 678
 679 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
 680   : wxGraphicsObjectRefData(renderer)
 681 {
 682     Init();
 683
 684     m_red = brush.GetColour().Red()/255.0;
 685     m_green = brush.GetColour().Green()/255.0;
 686     m_blue = brush.GetColour().Blue()/255.0;
 687     m_alpha = brush.GetColour().Alpha()/255.0;
 688     /*
 689     if ( brush.GetStyle() == wxBRUSHSTYLE_SOLID)
 690     {
 691     m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 692     brush.GetColour().Green() , brush.GetColour().Blue() ) );
 693     }
 694     else if ( brush.IsHatch() )
 695     {
 696     HatchStyle style = HatchStyleHorizontal;
 697     switch( brush.GetStyle() )
 698     {
 699     case wxBRUSHSTYLE_BDIAGONAL_HATCH :
 700     style = HatchStyleBackwardDiagonal;
 701     break ;
 702     case wxBRUSHSTYLE_CROSSDIAG_HATCH :
 703     style = HatchStyleDiagonalCross;
 704     break ;
 705     case wxBRUSHSTYLE_FDIAGONAL_HATCH :
 706     style = HatchStyleForwardDiagonal;
 707     break ;
 708     case wxBRUSHSTYLE_CROSS_HATCH :
 709     style = HatchStyleCross;
 710     break ;
 711     case wxBRUSHSTYLE_HORIZONTAL_HATCH :
 712     style = HatchStyleHorizontal;
 713     break ;
 714     case wxBRUSHSTYLE_VERTICAL_HATCH :
 715     style = HatchStyleVertical;
 716     break ;
 717
 718     }
 719     m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 720     brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 721     }
 722     else
 723     {
 724     wxBitmap* bmp = brush.GetStipple();
 725     if ( bmp && bmp->IsOk() )
 726     {
 727     wxDELETE( m_brushImage );
 728     m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 729     m_brush = new TextureBrush(m_brushImage);
 730     }
 731     }
 732     */
 733 }
 734
 735 wxCairoBrushData::~wxCairoBrushData ()
 736 {
 737     if (m_brushPattern)
 738         cairo_pattern_destroy(m_brushPattern);
 739 }
 740
 741 void wxCairoBrushData::Apply( wxGraphicsContext* context )
 742 {
 743     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 744     if ( m_brushPattern )
 745     {
 746         cairo_set_source(ctext,m_brushPattern);
 747     }
 748     else
 749     {
 750         cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 751     }
 752 }
 753
 754 void wxCairoBrushData::AddGradientStops(const wxGraphicsGradientStops& stops)
 755 {
 756     // loop over all the stops, they include the beginning and ending ones
 757     const unsigned numStops = stops.GetCount();
 758     for ( unsigned n = 0; n < numStops; n++ )
 759     {
 760         const wxGraphicsGradientStop stop = stops.Item(n);
 761
 762         const wxColour col = stop.GetColour();
 763
 764         cairo_pattern_add_color_stop_rgba
 765         (
 766             m_brushPattern,
 767             stop.GetPosition(),
 768             col.Red()/255.0,
 769             col.Green()/255.0,
 770             col.Blue()/255.0,
 771             col.Alpha()/255.0
 772         );
 773     }
 774
 775     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS,
 776                  wxT("Couldn't create cairo pattern"));
 777 }
 778
 779 void
 780 wxCairoBrushData::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 781                                             wxDouble x2, wxDouble y2,
 782                                             const wxGraphicsGradientStops& stops)
 783 {
 784     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 785
 786     AddGradientStops(stops);
 787 }
 788
 789 void
 790 wxCairoBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 791                                             wxDouble xc, wxDouble yc,
 792                                             wxDouble radius,
 793                                             const wxGraphicsGradientStops& stops)
 794 {
 795     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 796
 797     AddGradientStops(stops);
 798 }
 799
 800 void wxCairoBrushData::Init()
 801 {
 802     m_brushPattern = NULL;
 803 }
 804
 805 //-----------------------------------------------------------------------------
 806 // wxCairoFontData implementation
 807 //-----------------------------------------------------------------------------
 808
 809 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 810                          const wxColour& col ) : wxGraphicsObjectRefData(renderer)
 811 {
 812     m_red = col.Red()/255.0;
 813     m_green = col.Green()/255.0;
 814     m_blue = col.Blue()/255.0;
 815     m_alpha = col.Alpha()/255.0;
 816     m_size = font.GetPointSize();
 817     m_underlined = font.GetUnderlined();
 818
 819 #ifdef __WXMAC__
 820     m_font = cairo_quartz_font_face_create_for_cgfont( font.OSXGetCGFont() );
 821 #elif defined(__WXGTK__)
 822     m_font = pango_font_description_copy( font.GetNativeFontInfo()->description );
 823 #else
 824     m_fontName = font.GetFaceName().mb_str(wxConvUTF8);
 825     m_slant = font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL;
 826     m_weight = font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL;
 827 #endif
 828 }
 829
 830 wxCairoFontData::~wxCairoFontData()
 831 {
 832 #ifdef __WXMAC__
 833     cairo_font_face_destroy( m_font );
 834 #elif defined(__WXGTK__)
 835     pango_font_description_free( m_font );
 836 #else
 837 #endif
 838 }
 839
 840 void wxCairoFontData::Apply( wxGraphicsContext* context )
 841 {
 842     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 843     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 844 #ifdef __WXGTK__
 845     // the rest is done using Pango layouts
 846 #elif defined(__WXMAC__)
 847     cairo_set_font_face(ctext, m_font);
 848     cairo_set_font_size(ctext, m_size );
 849 #else
 850     cairo_select_font_face(ctext, m_fontName, m_slant, m_weight );
 851     cairo_set_font_size(ctext, m_size );
 852 #endif
 853 }
 854
 855 //-----------------------------------------------------------------------------
 856 // wxCairoPathData implementation
 857 //-----------------------------------------------------------------------------
 858
 859 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
 860     : wxGraphicsPathData(renderer)
 861 {
 862     if (pathcontext)
 863     {
 864         m_pathContext = pathcontext;
 865     }
 866     else
 867     {
 868         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 869         m_pathContext = cairo_create(surface);
 870         cairo_surface_destroy (surface);
 871     }
 872 }
 873
 874 wxCairoPathData::~wxCairoPathData()
 875 {
 876     cairo_destroy(m_pathContext);
 877 }
 878
 879 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
 880 {
 881     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 882     cairo_t* pathcontext = cairo_create(surface);
 883     cairo_surface_destroy (surface);
 884
 885     cairo_path_t* path = cairo_copy_path(m_pathContext);
 886     cairo_append_path(pathcontext, path);
 887     cairo_path_destroy(path);
 888     return new wxCairoPathData( GetRenderer() ,pathcontext);
 889 }
 890
 891
 892 void* wxCairoPathData::GetNativePath() const
 893 {
 894     return cairo_copy_path(m_pathContext) ;
 895 }
 896
 897 void wxCairoPathData::UnGetNativePath(void *p) const
 898 {
 899     cairo_path_destroy((cairo_path_t*)p);
 900 }
 901
 902 //
 903 // The Primitives
 904 //
 905
 906 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
 907 {
 908     cairo_move_to(m_pathContext,x,y);
 909 }
 910
 911 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
 912 {
 913     cairo_line_to(m_pathContext,x,y);
 914 }
 915
 916 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
 917 {
 918     cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
 919     cairo_append_path(m_pathContext, p);
 920     UnGetNativePath(p);
 921 }
 922
 923 void wxCairoPathData::CloseSubpath()
 924 {
 925     cairo_close_path(m_pathContext);
 926 }
 927
 928 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 929 {
 930     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
 931 }
 932
 933 // gets the last point of the current path, (0,0) if not yet set
 934 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
 935 {
 936     double dx,dy;
 937     cairo_get_current_point(m_pathContext,&dx,&dy);
 938     if (x)
 939         *x = dx;
 940     if (y)
 941         *y = dy;
 942 }
 943
 944 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 945 {
 946     // as clockwise means positive in our system (y pointing downwards)
 947     // TODO make this interpretation dependent of the
 948     // real device trans
 949     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
 950         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
 951     else
 952         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
 953 }
 954
 955 // transforms each point of this path by the matrix
 956 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
 957 {
 958     // as we don't have a true path object, we have to apply the inverse
 959     // matrix to the context
 960     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
 961     cairo_matrix_invert( &m );
 962     cairo_transform(m_pathContext,&m);
 963 }
 964
 965 // gets the bounding box enclosing all points (possibly including control points)
 966 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
 967 {
 968     double x1,y1,x2,y2;
 969
 970     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
 971     if ( x2 < x1 )
 972     {
 973         *x = x2;
 974         *w = x1-x2;
 975     }
 976     else
 977     {
 978         *x = x1;
 979         *w = x2-x1;
 980     }
 981
 982     if( y2 < y1 )
 983     {
 984         *y = y2;
 985         *h = y1-y2;
 986     }
 987     else
 988     {
 989         *y = y1;
 990         *h = y2-y1;
 991     }
 992 }
 993
 994 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle ) const
 995 {
 996     cairo_set_fill_rule(m_pathContext,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
 997     return cairo_in_fill( m_pathContext, x, y) != 0;
 998 }
 999
1000 //-----------------------------------------------------------------------------
1001 // wxCairoMatrixData implementation
1002 //-----------------------------------------------------------------------------
1003
1004 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
1005     : wxGraphicsMatrixData(renderer)
1006 {
1007     if ( matrix )
1008         m_matrix = *matrix;
1009 }
1010
1011 wxCairoMatrixData::~wxCairoMatrixData()
1012 {
1013     // nothing to do
1014 }
1015
1016 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
1017 {
1018     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
1019 }
1020
1021 // concatenates the matrix
1022 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
1023 {
1024     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
1025 }
1026
1027 // sets the matrix to the respective values
1028 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1029                         wxDouble tx, wxDouble ty)
1030 {
1031     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
1032 }
1033
1034 // gets the component valuess of the matrix
1035 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
1036                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
1037 {
1038     if (a)  *a = m_matrix.xx;
1039     if (b)  *b = m_matrix.yx;
1040     if (c)  *c = m_matrix.xy;
1041     if (d)  *d = m_matrix.yy;
1042     if (tx) *tx= m_matrix.x0;
1043     if (ty) *ty= m_matrix.y0;
1044 }
1045
1046 // makes this the inverse matrix
1047 void wxCairoMatrixData::Invert()
1048 {
1049     cairo_matrix_invert( &m_matrix );
1050 }
1051
1052 // returns true if the elements of the transformation matrix are equal ?
1053 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
1054 {
1055     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
1056     return (
1057         m_matrix.xx == tm->xx &&
1058         m_matrix.yx == tm->yx &&
1059         m_matrix.xy == tm->xy &&
1060         m_matrix.yy == tm->yy &&
1061         m_matrix.x0 == tm->x0 &&
1062         m_matrix.y0 == tm->y0 ) ;
1063 }
1064
1065 // return true if this is the identity matrix
1066 bool wxCairoMatrixData::IsIdentity() const
1067 {
1068     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
1069         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
1070 }
1071
1072 //
1073 // transformation
1074 //
1075
1076 // add the translation to this matrix
1077 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
1078 {
1079     cairo_matrix_translate( &m_matrix, dx, dy) ;
1080 }
1081
1082 // add the scale to this matrix
1083 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
1084 {
1085     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
1086 }
1087
1088 // add the rotation to this matrix (radians)
1089 void wxCairoMatrixData::Rotate( wxDouble angle )
1090 {
1091     cairo_matrix_rotate( &m_matrix, angle) ;
1092 }
1093
1094 //
1095 // apply the transforms
1096 //
1097
1098 // applies that matrix to the point
1099 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
1100 {
1101     double lx = *x, ly = *y ;
1102     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
1103     *x = lx;
1104     *y = ly;
1105 }
1106
1107 // applies the matrix except for translations
1108 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1109 {
1110     double lx = *dx, ly = *dy ;
1111     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1112     *dx = lx;
1113     *dy = ly;
1114 }
1115
1116 // returns the native representation
1117 void * wxCairoMatrixData::GetNativeMatrix() const
1118 {
1119     return (void*) &m_matrix;
1120 }
1121
1122 // ----------------------------------------------------------------------------
1123 // wxCairoBitmap implementation
1124 // ----------------------------------------------------------------------------
1125
1126 int wxCairoBitmapData::InitBuffer(int width, int height, cairo_format_t format)
1127 {
1128     wxUnusedVar(format); // Only really unused with Cairo < 1.6.
1129
1130     // Determine the stride: use cairo_format_stride_for_width() if available
1131     // but fall back to 4*width for the earlier versions as this is what that
1132     // function always returns, even in latest Cairo, anyhow.
1133     int stride;
1134 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 6, 0)
1135     if ( cairo_version() >= CAIRO_VERSION_ENCODE(1, 6, 0) )
1136     {
1137         stride = cairo_format_stride_for_width(format, width);
1138
1139         // All our code would totally break if stride were not a multiple of 4
1140         // so ensure this is the case.
1141         if ( stride % 4 )
1142         {
1143             wxFAIL_MSG("Unexpected Cairo image surface stride.");
1144
1145             stride += 4 - stride % 4;
1146         }
1147     }
1148     else
1149 #endif
1150         stride = 4*width;
1151
1152     m_width = width;
1153     m_height = height;
1154     m_buffer = new unsigned char[height*stride];
1155
1156     return stride;
1157 }
1158
1159 void wxCairoBitmapData::InitSurface(cairo_format_t format, int stride)
1160 {
1161     m_surface = cairo_image_surface_create_for_data(
1162                             m_buffer, format, m_width, m_height, stride);
1163     m_pattern = cairo_pattern_create_for_surface(m_surface);
1164 }
1165
1166 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap ) :
1167     wxGraphicsObjectRefData( renderer )
1168 {
1169     m_surface = bitmap;
1170     m_pattern = cairo_pattern_create_for_surface(m_surface);
1171 }
1172
1173 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp ) : wxGraphicsObjectRefData( renderer )
1174 {
1175     wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1176
1177 #ifdef wxHAS_RAW_BITMAP
1178     // Create a surface object and copy the bitmap pixel data to it.  if the
1179     // image has alpha (or a mask represented as alpha) then we'll use a
1180     // different format and iterator than if it doesn't...
1181     const cairo_format_t bufferFormat = bmp.GetDepth() == 32
1182 #ifdef __WXGTK__
1183                                             || bmp.GetMask()
1184 #endif
1185                                         ? CAIRO_FORMAT_ARGB32
1186                                         : CAIRO_FORMAT_RGB24;
1187
1188     int stride = InitBuffer(bmp.GetWidth(), bmp.GetHeight(), bufferFormat);
1189
1190     int bw = m_width;
1191     int bh = m_height;
1192     wxBitmap bmpSource = bmp;  // we need a non-const instance
1193     wxUint32* data = (wxUint32*)m_buffer;
1194
1195     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1196     {
1197         // use the bitmap's alpha
1198         wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1199         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1200
1201         wxAlphaPixelData::Iterator p(pixData);
1202         for (int y=0; y<bh; y++)
1203         {
1204             wxAlphaPixelData::Iterator rowStart = p;
1205             wxUint32* const rowStartDst = data;
1206             for (int x=0; x<bw; x++)
1207             {
1208                 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1209                 // with alpha in the upper 8 bits, then red, then green, then
1210                 // blue. The 32-bit quantities are stored native-endian.
1211                 // Pre-multiplied alpha is used.
1212                 unsigned char alpha = p.Alpha();
1213                 if (alpha == 0)
1214                     *data = 0;
1215                 else
1216                     *data = ( alpha                      << 24
1217                               | (p.Red() * alpha/255)    << 16
1218                               | (p.Green() * alpha/255)  <<  8
1219                               | (p.Blue() * alpha/255) );
1220                 ++data;
1221                 ++p;
1222             }
1223
1224             data = rowStartDst + stride / 4;
1225             p = rowStart;
1226             p.OffsetY(pixData, 1);
1227         }
1228     }
1229     else  // no alpha
1230     {
1231         wxNativePixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1232         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1233
1234         wxNativePixelData::Iterator p(pixData);
1235         for (int y=0; y<bh; y++)
1236         {
1237             wxNativePixelData::Iterator rowStart = p;
1238             wxUint32* const rowStartDst = data;
1239             for (int x=0; x<bw; x++)
1240             {
1241                 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1242                 // the upper 8 bits unused. Red, Green, and Blue are stored in
1243                 // the remaining 24 bits in that order.  The 32-bit quantities
1244                 // are stored native-endian.
1245                 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1246                 ++data;
1247                 ++p;
1248             }
1249
1250             data = rowStartDst + stride / 4;
1251             p = rowStart;
1252             p.OffsetY(pixData, 1);
1253         }
1254     }
1255 #ifdef __WXMSW__
1256     // if there is a mask, set the alpha bytes in the target buffer to
1257     // fully transparent or fully opaque
1258     if (bmpSource.GetMask())
1259     {
1260         wxBitmap bmpMask = bmpSource.GetMaskBitmap();
1261         bufferFormat = CAIRO_FORMAT_ARGB32;
1262         data = (wxUint32*)m_buffer;
1263         wxNativePixelData pixData(bmpMask, wxPoint(0,0), wxSize(bw, bh));
1264         wxCHECK_RET( pixData, wxT("Failed to gain raw access to mask bitmap data."));
1265
1266         wxNativePixelData::Iterator p(pixData);
1267         for (int y=0; y<bh; y++)
1268         {
1269             wxNativePixelData::Iterator rowStart = p;
1270             wxUint32* const rowStartDst = data;
1271             for (int x=0; x<bw; x++)
1272             {
1273                 if (p.Red()+p.Green()+p.Blue() == 0)
1274                     *data = 0;
1275                 else
1276                     *data = (wxALPHA_OPAQUE << 24) | (*data & 0x00FFFFFF);
1277                 ++data;
1278                 ++p;
1279             }
1280
1281             data = rowStartDst + stride / 4;
1282             p = rowStart;
1283             p.OffsetY(pixData, 1);
1284         }
1285     }
1286 #endif
1287
1288     InitSurface(bufferFormat, stride);
1289 #endif // wxHAS_RAW_BITMAP
1290 }
1291
1292 #if wxUSE_IMAGE
1293
1294 // Helper functions for dealing with alpha pre-multiplication.
1295 namespace
1296 {
1297
1298 inline unsigned char Premultiply(unsigned char alpha, unsigned char data)
1299 {
1300     return alpha ? (data * alpha)/0xff : data;
1301 }
1302
1303 inline unsigned char Unpremultiply(unsigned char alpha, unsigned char data)
1304 {
1305     return alpha ? (data * 0xff)/alpha : data;
1306 }
1307
1308 } // anonymous namespace
1309
1310 wxCairoBitmapData::wxCairoBitmapData(wxGraphicsRenderer* renderer,
1311                                      const wxImage& image)
1312     : wxGraphicsObjectRefData(renderer)
1313 {
1314     const cairo_format_t bufferFormat = image.HasAlpha()
1315                                             ? CAIRO_FORMAT_ARGB32
1316                                             : CAIRO_FORMAT_RGB24;
1317
1318     int stride = InitBuffer(image.GetWidth(), image.GetHeight(), bufferFormat);
1319
1320     // Copy wxImage data into the buffer. Notice that we work with wxUint32
1321     // values and not bytes becase Cairo always works with buffers in native
1322     // endianness.
1323     wxUint32* dst = reinterpret_cast<wxUint32*>(m_buffer);
1324     const unsigned char* src = image.GetData();
1325
1326     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1327     {
1328         const unsigned char* alpha = image.GetAlpha();
1329
1330         for ( int y = 0; y < m_height; y++ )
1331         {
1332             wxUint32* const rowStartDst = dst;
1333
1334             for ( int x = 0; x < m_width; x++ )
1335             {
1336                 const unsigned char a = *alpha++;
1337
1338                 *dst++ = a                      << 24 |
1339                          Premultiply(a, src[0]) << 16 |
1340                          Premultiply(a, src[1]) <<  8 |
1341                          Premultiply(a, src[2]);
1342                 src += 3;
1343             }
1344
1345             dst = rowStartDst + stride / 4;
1346         }
1347     }
1348     else // RGB
1349     {
1350         for ( int y = 0; y < m_height; y++ )
1351         {
1352             wxUint32* const rowStartDst = dst;
1353
1354             for ( int x = 0; x < m_width; x++ )
1355             {
1356                 *dst++ = src[0] << 16 |
1357                          src[1] <<  8 |
1358                          src[2];
1359                 src += 3;
1360             }
1361
1362             dst = rowStartDst + stride / 4;
1363         }
1364     }
1365
1366     InitSurface(bufferFormat, stride);
1367 }
1368
1369 wxImage wxCairoBitmapData::ConvertToImage() const
1370 {
1371     wxImage image(m_width, m_height, false /* don't clear */);
1372
1373     // Get the surface type and format.
1374     wxCHECK_MSG( cairo_surface_get_type(m_surface) == CAIRO_SURFACE_TYPE_IMAGE,
1375                  wxNullImage,
1376                  wxS("Can't convert non-image surface to image.") );
1377
1378     switch ( cairo_image_surface_get_format(m_surface) )
1379     {
1380         case CAIRO_FORMAT_ARGB32:
1381             image.SetAlpha();
1382             break;
1383
1384         case CAIRO_FORMAT_RGB24:
1385             // Nothing to do, we don't use alpha by default.
1386             break;
1387
1388         case CAIRO_FORMAT_A8:
1389         case CAIRO_FORMAT_A1:
1390             wxFAIL_MSG(wxS("Unsupported Cairo image surface type."));
1391             return wxNullImage;
1392
1393         default:
1394             wxFAIL_MSG(wxS("Unknown Cairo image surface type."));
1395             return wxNullImage;
1396     }
1397
1398     // Prepare for copying data.
1399     const wxUint32* src = (wxUint32*)cairo_image_surface_get_data(m_surface);
1400     wxCHECK_MSG( src, wxNullImage, wxS("Failed to get Cairo surface data.") );
1401
1402     int stride = cairo_image_surface_get_stride(m_surface);
1403     wxCHECK_MSG( stride > 0, wxNullImage,
1404                  wxS("Failed to get Cairo surface stride.") );
1405
1406     // As we work with wxUint32 pointers and not char ones, we need to adjust
1407     // the stride accordingly. This should be lossless as the stride must be a
1408     // multiple of pixel size.
1409     wxASSERT_MSG( !(stride % sizeof(wxUint32)), wxS("Unexpected stride.") );
1410     stride /= sizeof(wxUint32);
1411
1412     unsigned char* dst = image.GetData();
1413     unsigned char *alpha = image.GetAlpha();
1414     if ( alpha )
1415     {
1416         // We need to also copy alpha and undo the pre-multiplication as Cairo
1417         // stores pre-multiplied values in this format while wxImage does not.
1418         for ( int y = 0; y < m_height; y++ )
1419         {
1420             const wxUint32* const rowStart = src;
1421             for ( int x = 0; x < m_width; x++ )
1422             {
1423                 const wxUint32 argb = *src++;
1424
1425                 *alpha++ = (argb & 0xff000000) >> 24;
1426
1427                 // Copy the RGB data undoing the pre-multiplication.
1428                 *dst++ = Unpremultiply(*alpha, (argb & 0x00ff0000) >> 16);
1429                 *dst++ = Unpremultiply(*alpha, (argb & 0x0000ff00) >>  8);
1430                 *dst++ = Unpremultiply(*alpha, (argb & 0x000000ff));
1431             }
1432
1433             src = rowStart + stride;
1434         }
1435     }
1436     else // RGB
1437     {
1438         // Things are pretty simple in this case, just copy RGB bytes.
1439         for ( int y = 0; y < m_height; y++ )
1440         {
1441             const wxUint32* const rowStart = src;
1442             for ( int x = 0; x < m_width; x++ )
1443             {
1444                 const wxUint32 argb = *src++;
1445
1446                 *dst++ = (argb & 0x00ff0000) >> 16;
1447                 *dst++ = (argb & 0x0000ff00) >>  8;
1448                 *dst++ = (argb & 0x000000ff);
1449             }
1450
1451             src = rowStart + stride;
1452         }
1453     }
1454
1455     return image;
1456 }
1457
1458 #endif // wxUSE_IMAGE
1459
1460 wxCairoBitmapData::~wxCairoBitmapData()
1461 {
1462     if (m_pattern)
1463         cairo_pattern_destroy(m_pattern);
1464
1465     if (m_surface)
1466         cairo_surface_destroy(m_surface);
1467
1468     delete [] m_buffer;
1469 }
1470
1471 // ----------------------------------------------------------------------------
1472 // wxGraphicsBitmap implementation
1473 // ----------------------------------------------------------------------------
1474
1475 #if wxUSE_IMAGE
1476
1477 wxImage wxGraphicsBitmap::ConvertToImage() const
1478 {
1479     const wxCairoBitmapData* const
1480         data = static_cast<wxCairoBitmapData*>(GetGraphicsData());
1481
1482     return data ? data->ConvertToImage() : wxNullImage;
1483 }
1484
1485 #endif // wxUSE_IMAGE
1486
1487 //-----------------------------------------------------------------------------
1488 // wxCairoContext implementation
1489 //-----------------------------------------------------------------------------
1490
1491 class wxCairoOffsetHelper
1492 {
1493 public :
1494     wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1495     {
1496         m_ctx = ctx;
1497         m_offset = offset;
1498         if ( m_offset )
1499              cairo_translate( m_ctx, 0.5, 0.5 );
1500     }
1501     ~wxCairoOffsetHelper( )
1502     {
1503         if ( m_offset )
1504             cairo_translate( m_ctx, -0.5, -0.5 );
1505     }
1506 public :
1507     cairo_t* m_ctx;
1508     bool m_offset;
1509 } ;
1510
1511 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1512 : wxGraphicsContext(renderer)
1513 {
1514 #ifdef __WXMSW__
1515     // wxMSW contexts always use MM_ANISOTROPIC, which messes up
1516     // text rendering when printing using Cairo. Switch it to MM_TEXT
1517     // map mode to avoid this problem.
1518     HDC hdc = (HDC)dc.GetHDC();
1519     ::SetMapMode(hdc, MM_TEXT);
1520     m_mswSurface = cairo_win32_printing_surface_create(hdc);
1521     Init( cairo_create(m_mswSurface) );
1522 #endif
1523
1524 #ifdef __WXGTK20__
1525     const wxDCImpl *impl = dc.GetImpl();
1526     Init( (cairo_t*) impl->GetCairoContext() );
1527 #endif
1528     wxSize sz = dc.GetSize();
1529     m_width = sz.x;
1530     m_height = sz.y;
1531
1532     wxPoint org = dc.GetDeviceOrigin();
1533     cairo_translate( m_context, org.x, org.y );
1534
1535     double sx,sy;
1536     dc.GetUserScale( &sx, &sy );
1537
1538 // TODO: Determine if these fixes are needed on other platforms too.
1539 // On MSW, without this the printer context will not respect wxDC SetMapMode calls.
1540 // For example, using dc.SetMapMode(wxMM_POINTS) can let us share printer and screen
1541 // drawing code
1542 #ifdef __WXMSW__
1543     double lsx,lsy;
1544     dc.GetLogicalScale( &lsx, &lsy );
1545     sx *= lsx;
1546     sy *= lsy;
1547 #endif
1548     cairo_scale( m_context, sx, sy );
1549
1550     org = dc.GetLogicalOrigin();
1551     cairo_translate( m_context, -org.x, -org.y );
1552 }
1553
1554 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1555 : wxGraphicsContext(renderer)
1556 {
1557     int width, height;
1558     dc.GetSize( &width, &height );
1559     m_width = width;
1560     m_height = height;
1561
1562     m_enableOffset = true;
1563
1564 #ifdef __WXMSW__
1565     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1566     Init( cairo_create(m_mswSurface) );
1567 #endif
1568
1569 #ifdef __WXGTK20__
1570     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1571     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1572
1573 #if 0
1574     wxGraphicsMatrix matrix = CreateMatrix();
1575
1576     wxPoint org = dc.GetDeviceOrigin();
1577     matrix.Translate( org.x, org.y );
1578
1579     org = dc.GetLogicalOrigin();
1580     matrix.Translate( -org.x, -org.y );
1581
1582     double sx,sy;
1583     dc.GetUserScale( &sx, &sy );
1584     matrix.Scale( sx, sy );
1585
1586     ConcatTransform( matrix );
1587 #endif
1588 #endif
1589
1590 #ifdef __WXMAC__
1591     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1592     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1593     Init( cairo_create( surface ) );
1594     cairo_surface_destroy( surface );
1595 #endif
1596 }
1597
1598 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1599 : wxGraphicsContext(renderer)
1600 {
1601     int width, height;
1602     dc.GetSize( &width, &height );
1603     m_width = width;
1604     m_height = height;
1605
1606     m_enableOffset = true;
1607
1608 #ifdef __WXMSW__
1609     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1610     Init( cairo_create(m_mswSurface) );
1611 #endif
1612
1613 #ifdef __WXGTK20__
1614     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1615     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1616
1617 #if 0
1618     wxGraphicsMatrix matrix = CreateMatrix();
1619
1620     wxPoint org = dc.GetDeviceOrigin();
1621     matrix.Translate( org.x, org.y );
1622
1623     org = dc.GetLogicalOrigin();
1624     matrix.Translate( -org.x, -org.y );
1625
1626     double sx,sy;
1627     dc.GetUserScale( &sx, &sy );
1628     matrix.Scale( sx, sy );
1629
1630     ConcatTransform( matrix );
1631 #endif
1632 #endif
1633
1634 #ifdef __WXMAC__
1635     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1636     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1637     Init( cairo_create( surface ) );
1638     cairo_surface_destroy( surface );
1639 #endif
1640 }
1641
1642 #ifdef __WXGTK20__
1643 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
1644 : wxGraphicsContext(renderer)
1645 {
1646     Init( gdk_cairo_create( drawable ) );
1647
1648     int width, height;
1649     gdk_drawable_get_size( drawable, &width, &height );
1650     m_width = width;
1651     m_height = height;
1652 }
1653 #endif
1654
1655 #ifdef __WXMSW__
1656 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, HDC handle )
1657 : wxGraphicsContext(renderer)
1658 {
1659     m_mswSurface = cairo_win32_surface_create(handle);
1660     Init( cairo_create(m_mswSurface) );
1661     m_width =
1662     m_height = 0;
1663 }
1664 #endif
1665
1666
1667 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1668 : wxGraphicsContext(renderer)
1669 {
1670     Init( context );
1671     m_width =
1672     m_height = 0;
1673 }
1674
1675 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1676 : wxGraphicsContext(renderer)
1677 {
1678     m_enableOffset = true;
1679 #ifdef __WXGTK__
1680     // something along these lines (copied from dcclient)
1681
1682     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1683     // code should still be able to create wxClientDCs for them, so we will
1684     // use the parent window here then.
1685     if (window->m_wxwindow == NULL)
1686     {
1687         window = window->GetParent();
1688     }
1689
1690     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1691
1692     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1693
1694     wxSize sz = window->GetSize();
1695     m_width = sz.x;
1696     m_height = sz.y;
1697 #endif
1698
1699 #ifdef __WXMSW__
1700     m_mswSurface = cairo_win32_surface_create((HDC)window->GetHandle());
1701     Init(cairo_create(m_mswSurface));
1702 #endif
1703
1704 }
1705
1706 wxCairoContext::wxCairoContext(wxGraphicsRenderer* renderer) :
1707     wxGraphicsContext(renderer)
1708 {
1709     m_context = NULL;
1710 }
1711
1712 wxCairoContext::~wxCairoContext()
1713 {
1714     if ( m_context )
1715     {
1716         PopState();
1717         PopState();
1718         cairo_destroy(m_context);
1719     }
1720 #ifdef __WXMSW__
1721     if ( m_mswSurface )
1722         cairo_surface_destroy(m_mswSurface);
1723 #endif
1724 }
1725
1726 void wxCairoContext::Init(cairo_t *context)
1727 {
1728     m_context = context ;
1729     PushState();
1730     PushState();
1731 }
1732
1733
1734 void wxCairoContext::Clip( const wxRegion& region )
1735 {
1736     // Create a path with all the rectangles in the region
1737     wxGraphicsPath path = GetRenderer()->CreatePath();
1738     wxRegionIterator ri(region);
1739     while (ri)
1740     {
1741         path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1742         ++ri;
1743     }
1744
1745     // Put it in the context
1746     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1747     cairo_append_path(m_context, cp);
1748
1749     // clip to that path
1750     cairo_clip(m_context);
1751     path.UnGetNativePath(cp);
1752 }
1753
1754 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1755 {
1756     // Create a path with this rectangle
1757     wxGraphicsPath path = GetRenderer()->CreatePath();
1758     path.AddRectangle(x,y,w,h);
1759
1760     // Put it in the context
1761     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1762     cairo_append_path(m_context, cp);
1763
1764     // clip to that path
1765     cairo_clip(m_context);
1766     path.UnGetNativePath(cp);
1767 }
1768
1769 void wxCairoContext::ResetClip()
1770 {
1771     cairo_reset_clip(m_context);
1772 }
1773
1774
1775 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1776 {
1777     if ( !m_pen.IsNull() )
1778     {
1779         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1780         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1781         cairo_append_path(m_context,cp);
1782         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1783         cairo_stroke(m_context);
1784         path.UnGetNativePath(cp);
1785     }
1786 }
1787
1788 void wxCairoContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1789 {
1790     if ( !m_brush.IsNull() )
1791     {
1792         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1793         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1794         cairo_append_path(m_context,cp);
1795         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1796         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1797         cairo_fill(m_context);
1798         path.UnGetNativePath(cp);
1799     }
1800 }
1801
1802 void wxCairoContext::Rotate( wxDouble angle )
1803 {
1804     cairo_rotate(m_context,angle);
1805 }
1806
1807 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1808 {
1809     cairo_translate(m_context,dx,dy);
1810 }
1811
1812 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1813 {
1814     cairo_scale(m_context,xScale,yScale);
1815 }
1816
1817 // concatenates this transform with the current transform of this context
1818 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1819 {
1820     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1821 }
1822
1823 // sets the transform of this context
1824 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1825 {
1826     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1827 }
1828
1829 // gets the matrix of this context
1830 wxGraphicsMatrix wxCairoContext::GetTransform() const
1831 {
1832     wxGraphicsMatrix matrix = CreateMatrix();
1833     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1834     return matrix;
1835 }
1836
1837
1838
1839 void wxCairoContext::PushState()
1840 {
1841     cairo_save(m_context);
1842 }
1843
1844 void wxCairoContext::PopState()
1845 {
1846     cairo_restore(m_context);
1847 }
1848
1849 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1850 {
1851     wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp);
1852     DrawBitmap(bitmap, x, y, w, h);
1853
1854 }
1855
1856 void wxCairoContext::DrawBitmap(const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1857 {
1858     PushState();
1859
1860     // In case we're scaling the image by using a width and height different
1861     // than the bitmap's size create a pattern transformation on the surface and
1862     // draw the transformed pattern.
1863     wxCairoBitmapData* data = static_cast<wxCairoBitmapData*>(bmp.GetRefData());
1864     cairo_pattern_t* pattern = data->GetCairoPattern();
1865     wxSize size = data->GetSize();
1866
1867     wxDouble scaleX = w / size.GetWidth();
1868     wxDouble scaleY = h / size.GetHeight();
1869
1870     // prepare to draw the image
1871     cairo_translate(m_context, x, y);
1872     cairo_scale(m_context, scaleX, scaleY);
1873     cairo_set_source(m_context, pattern);
1874     // use the original size here since the context is scaled already...
1875     cairo_rectangle(m_context, 0, 0, size.GetWidth(), size.GetHeight());
1876     // fill the rectangle using the pattern
1877     cairo_fill(m_context);
1878
1879     PopState();
1880 }
1881
1882 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1883 {
1884     // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
1885     // start using the Cairo backend on other platforms then we may need to
1886     // fiddle with this...
1887     DrawBitmap(icon, x, y, w, h);
1888 }
1889
1890
1891 void wxCairoContext::DoDrawText(const wxString& str, wxDouble x, wxDouble y)
1892 {
1893     wxCHECK_RET( !m_font.IsNull(),
1894                  wxT("wxCairoContext::DrawText - no valid font set") );
1895
1896     if ( str.empty())
1897         return;
1898
1899     const wxCharBuffer data = str.utf8_str();
1900     if ( !data )
1901         return;
1902
1903     ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
1904
1905 #ifdef __WXGTK__
1906     size_t datalen = strlen(data);
1907
1908     PangoLayout *layout = pango_cairo_create_layout (m_context);
1909     wxCairoFontData* font_data = (wxCairoFontData*) m_font.GetRefData();
1910     pango_layout_set_font_description( layout, font_data->GetFont());
1911     pango_layout_set_text(layout, data, datalen);
1912
1913     if (font_data->GetUnderlined())
1914     {
1915         PangoAttrList *attrs = pango_attr_list_new();
1916         PangoAttribute *attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
1917         pango_attr_list_insert(attrs, attr);
1918         pango_layout_set_attributes(layout, attrs);
1919         pango_attr_list_unref(attrs);
1920     }
1921
1922     cairo_move_to(m_context, x, y);
1923     pango_cairo_show_layout (m_context, layout);
1924
1925     g_object_unref (layout);
1926 #else
1927     // Cairo's x,y for drawing text is at the baseline, so we need to adjust
1928     // the position we move to by the ascent.
1929     cairo_font_extents_t fe;
1930     cairo_font_extents(m_context, &fe);
1931     cairo_move_to(m_context, x, y+fe.ascent);
1932
1933     cairo_show_text(m_context, data);
1934 #endif
1935 }
1936
1937 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1938                                     wxDouble *descent, wxDouble *externalLeading ) const
1939 {
1940     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
1941
1942     if ( width )
1943         *width = 0;
1944     if ( height )
1945         *height = 0;
1946     if ( descent )
1947         *descent = 0;
1948     if ( externalLeading )
1949         *externalLeading = 0;
1950
1951     if ( str.empty())
1952         return;
1953
1954 #ifdef __WXGTK__
1955     int w, h;
1956
1957     PangoLayout *layout = pango_cairo_create_layout (m_context);
1958     pango_layout_set_font_description( layout, ((wxCairoFontData*)m_font.GetRefData())->GetFont());
1959     const wxCharBuffer data = str.utf8_str();
1960     if ( !data )
1961     {
1962         return;
1963     }
1964     pango_layout_set_text( layout, data, strlen(data) );
1965     pango_layout_get_pixel_size (layout, &w, &h);
1966     if ( width )
1967         *width = w;
1968     if ( height )
1969         *height = h;
1970     if (descent)
1971     {
1972         PangoLayoutIter *iter = pango_layout_get_iter(layout);
1973         int baseline = pango_layout_iter_get_baseline(iter);
1974         pango_layout_iter_free(iter);
1975         *descent = h - PANGO_PIXELS(baseline);
1976     }
1977     g_object_unref (layout);
1978 #else
1979     ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this);
1980
1981     if (width)
1982     {
1983         const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
1984         cairo_text_extents_t te;
1985         cairo_text_extents(m_context, buf, &te);
1986         *width = te.width;
1987     }
1988
1989     if (height || descent || externalLeading)
1990     {
1991         cairo_font_extents_t fe;
1992         cairo_font_extents(m_context, &fe);
1993
1994         // some backends have negative descents
1995
1996         if ( fe.descent < 0 )
1997             fe.descent = -fe.descent;
1998
1999         if ( fe.height < (fe.ascent + fe.descent ) )
2000         {
2001             // some backends are broken re height ... (eg currently ATSUI)
2002             fe.height = fe.ascent + fe.descent;
2003         }
2004
2005         if (height)
2006             *height = fe.height;
2007         if ( descent )
2008             *descent = fe.descent;
2009         if ( externalLeading )
2010             *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
2011     }
2012 #endif
2013 }
2014
2015 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
2016 {
2017     widths.Empty();
2018     widths.Add(0, text.length());
2019
2020     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
2021
2022     if (text.empty())
2023         return;
2024
2025     // TODO
2026 }
2027
2028 void * wxCairoContext::GetNativeContext()
2029 {
2030     return m_context;
2031 }
2032
2033 bool wxCairoContext::SetAntialiasMode(wxAntialiasMode antialias)
2034 {
2035     if (m_antialias == antialias)
2036         return true;
2037
2038     m_antialias = antialias;
2039
2040     cairo_antialias_t antialiasMode;
2041     switch (antialias)
2042     {
2043         case wxANTIALIAS_DEFAULT:
2044             antialiasMode = CAIRO_ANTIALIAS_DEFAULT;
2045             break;
2046         case wxANTIALIAS_NONE:
2047             antialiasMode = CAIRO_ANTIALIAS_NONE;
2048             break;
2049         default:
2050             return false;
2051     }
2052     cairo_set_antialias(m_context, antialiasMode);
2053     return true;
2054 }
2055
2056 bool wxCairoContext::SetInterpolationQuality(wxInterpolationQuality WXUNUSED(interpolation))
2057 {
2058     // placeholder
2059     return false;
2060 }
2061
2062 bool wxCairoContext::SetCompositionMode(wxCompositionMode op)
2063 {
2064     if ( m_composition == op )
2065         return true;
2066
2067     m_composition = op;
2068     cairo_operator_t cop;
2069     switch (op)
2070     {
2071         case wxCOMPOSITION_CLEAR:
2072             cop = CAIRO_OPERATOR_CLEAR;
2073             break;
2074         case wxCOMPOSITION_SOURCE:
2075             cop = CAIRO_OPERATOR_SOURCE;
2076             break;
2077         case wxCOMPOSITION_OVER:
2078             cop = CAIRO_OPERATOR_OVER;
2079             break;
2080         case wxCOMPOSITION_IN:
2081             cop = CAIRO_OPERATOR_IN;
2082             break;
2083         case wxCOMPOSITION_OUT:
2084             cop = CAIRO_OPERATOR_OUT;
2085             break;
2086         case wxCOMPOSITION_ATOP:
2087             cop = CAIRO_OPERATOR_ATOP;
2088             break;
2089         case wxCOMPOSITION_DEST:
2090             cop = CAIRO_OPERATOR_DEST;
2091             break;
2092         case wxCOMPOSITION_DEST_OVER:
2093             cop = CAIRO_OPERATOR_DEST_OVER;
2094             break;
2095         case wxCOMPOSITION_DEST_IN:
2096             cop = CAIRO_OPERATOR_DEST_IN;
2097             break;
2098         case wxCOMPOSITION_DEST_OUT:
2099             cop = CAIRO_OPERATOR_DEST_OUT;
2100             break;
2101         case wxCOMPOSITION_DEST_ATOP:
2102             cop = CAIRO_OPERATOR_DEST_ATOP;
2103             break;
2104         case wxCOMPOSITION_XOR:
2105             cop = CAIRO_OPERATOR_XOR;
2106             break;
2107         case wxCOMPOSITION_ADD:
2108             cop = CAIRO_OPERATOR_ADD;
2109             break;
2110         default:
2111             return false;
2112     }
2113     cairo_set_operator(m_context, cop);
2114     return true;
2115 }
2116
2117 void wxCairoContext::BeginLayer(wxDouble opacity)
2118 {
2119     m_layerOpacities.push_back(opacity);
2120     cairo_push_group(m_context);
2121 }
2122
2123 void wxCairoContext::EndLayer()
2124 {
2125     float opacity = m_layerOpacities.back();
2126     m_layerOpacities.pop_back();
2127     cairo_pop_group_to_source(m_context);
2128     cairo_paint_with_alpha(m_context,opacity);
2129 }
2130
2131 //-----------------------------------------------------------------------------
2132 // wxCairoRenderer declaration
2133 //-----------------------------------------------------------------------------
2134
2135 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
2136 {
2137 public :
2138     wxCairoRenderer() {}
2139
2140     virtual ~wxCairoRenderer() {}
2141
2142     // Context
2143
2144     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
2145     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
2146     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
2147
2148     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
2149
2150     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
2151 #if wxUSE_IMAGE
2152     virtual wxGraphicsContext * CreateContextFromImage(wxImage& image);
2153 #endif // wxUSE_IMAGE
2154
2155     virtual wxGraphicsContext * CreateContext( wxWindow* window );
2156
2157     virtual wxGraphicsContext * CreateMeasuringContext();
2158 #ifdef __WXMSW__
2159 #if wxUSE_ENH_METAFILE
2160     virtual wxGraphicsContext * CreateContext( const wxEnhMetaFileDC& dc);
2161 #endif
2162 #endif
2163     // Path
2164
2165     virtual wxGraphicsPath CreatePath();
2166
2167     // Matrix
2168
2169     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
2170         wxDouble tx=0.0, wxDouble ty=0.0);
2171
2172
2173     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
2174
2175     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
2176
2177     virtual wxGraphicsBrush
2178     CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2179                               wxDouble x2, wxDouble y2,
2180                               const wxGraphicsGradientStops& stops);
2181
2182     virtual wxGraphicsBrush
2183     CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2184                               wxDouble xc, wxDouble yc,
2185                               wxDouble radius,
2186                               const wxGraphicsGradientStops& stops);
2187
2188     // sets the font
2189     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
2190
2191     // create a native bitmap representation
2192     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap );
2193 #if wxUSE_IMAGE
2194     virtual wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image);
2195 #endif // wxUSE_IMAGE
2196
2197     // create a graphics bitmap from a native bitmap
2198     virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
2199
2200     // create a subimage from a native image representation
2201     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  );
2202
2203 protected :
2204     bool EnsureIsLoaded();
2205     void Load();
2206     void Unload();
2207     friend class wxCairoModule;
2208 private :
2209     int m_loaded;
2210     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
2211 } ;
2212
2213 //-----------------------------------------------------------------------------
2214 // wxCairoRenderer implementation
2215 //-----------------------------------------------------------------------------
2216
2217 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
2218
2219 static wxCairoRenderer gs_cairoGraphicsRenderer;
2220 // temporary hack to allow creating a cairo context on any platform
2221 extern wxGraphicsRenderer* gCairoRenderer;
2222 wxGraphicsRenderer* gCairoRenderer = &gs_cairoGraphicsRenderer;
2223
2224 bool wxCairoRenderer::EnsureIsLoaded()
2225 {
2226 #ifndef __WXGTK__
2227     Load();
2228     return wxCairoInit();
2229 #else
2230     return true;
2231 #endif
2232 }
2233
2234 void wxCairoRenderer::Load()
2235 {
2236     wxCairoInit();
2237 }
2238
2239 void wxCairoRenderer::Unload()
2240 {
2241     wxCairoCleanUp();
2242 }
2243
2244 // call EnsureIsLoaded() and return returnOnFail value if it fails
2245 #define ENSURE_LOADED_OR_RETURN(returnOnFail)  \
2246     if ( !EnsureIsLoaded() )                   \
2247         return (returnOnFail)
2248
2249 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
2250 {
2251     ENSURE_LOADED_OR_RETURN(NULL);
2252     return new wxCairoContext(this,dc);
2253 }
2254
2255 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
2256 {
2257     ENSURE_LOADED_OR_RETURN(NULL);
2258     return new wxCairoContext(this,dc);
2259 }
2260
2261 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
2262 {
2263     ENSURE_LOADED_OR_RETURN(NULL);
2264 #ifdef __WXGTK20__
2265     const wxDCImpl *impl = dc.GetImpl();
2266     cairo_t* context = (cairo_t*) impl->GetCairoContext();
2267     if (context)
2268        return new wxCairoContext(this,dc);
2269     else
2270 #endif
2271        return new wxCairoContext(this,dc);
2272 }
2273
2274 #ifdef __WXMSW__
2275 #if wxUSE_ENH_METAFILE
2276 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxEnhMetaFileDC& WXUNUSED(dc) )
2277 {
2278     ENSURE_LOADED_OR_RETURN(NULL);
2279     return NULL;
2280 }
2281 #endif
2282 #endif
2283
2284 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
2285 {
2286     ENSURE_LOADED_OR_RETURN(NULL);
2287 #ifdef __WXMSW__
2288     return new wxCairoContext(this,(HDC)context);
2289 #else
2290     return new wxCairoContext(this,(cairo_t*)context);
2291 #endif
2292 }
2293
2294
2295 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
2296 {
2297     ENSURE_LOADED_OR_RETURN(NULL);
2298 #ifdef __WXGTK__
2299     return new wxCairoContext(this,(GdkDrawable*)window);
2300 #else
2301     wxUnusedVar(window);
2302     return NULL;
2303 #endif
2304 }
2305
2306 #if wxUSE_IMAGE
2307 wxGraphicsContext * wxCairoRenderer::CreateContextFromImage(wxImage& image)
2308 {
2309     return new wxCairoImageContext(this, image);
2310 }
2311 #endif // wxUSE_IMAGE
2312
2313 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
2314 {
2315     ENSURE_LOADED_OR_RETURN(NULL);
2316 #ifdef __WXGTK__
2317     return CreateContextFromNativeWindow(gdk_get_default_root_window());
2318 #endif
2319     return NULL;
2320     // TODO
2321 }
2322
2323 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
2324 {
2325     ENSURE_LOADED_OR_RETURN(NULL);
2326     return new wxCairoContext(this, window );
2327 }
2328
2329 // Path
2330
2331 wxGraphicsPath wxCairoRenderer::CreatePath()
2332 {
2333     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPath);
2334     wxGraphicsPath path;
2335     path.SetRefData( new wxCairoPathData(this) );
2336     return path;
2337 }
2338
2339
2340 // Matrix
2341
2342 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
2343                                                 wxDouble tx, wxDouble ty)
2344
2345 {
2346     ENSURE_LOADED_OR_RETURN(wxNullGraphicsMatrix);
2347     wxGraphicsMatrix m;
2348     wxCairoMatrixData* data = new wxCairoMatrixData( this );
2349     data->Set( a,b,c,d,tx,ty ) ;
2350     m.SetRefData(data);
2351     return m;
2352 }
2353
2354 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
2355 {
2356     ENSURE_LOADED_OR_RETURN(wxNullGraphicsPen);
2357     if ( !pen.IsOk() || pen.GetStyle() == wxPENSTYLE_TRANSPARENT )
2358         return wxNullGraphicsPen;
2359     else
2360     {
2361         wxGraphicsPen p;
2362         p.SetRefData(new wxCairoPenData( this, pen ));
2363         return p;
2364     }
2365 }
2366
2367 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
2368 {
2369     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2370     if ( !brush.IsOk() || brush.GetStyle() == wxBRUSHSTYLE_TRANSPARENT )
2371         return wxNullGraphicsBrush;
2372     else
2373     {
2374         wxGraphicsBrush p;
2375         p.SetRefData(new wxCairoBrushData( this, brush ));
2376         return p;
2377     }
2378 }
2379
2380 wxGraphicsBrush
2381 wxCairoRenderer::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2382                                            wxDouble x2, wxDouble y2,
2383                                            const wxGraphicsGradientStops& stops)
2384 {
2385     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2386     wxGraphicsBrush p;
2387     wxCairoBrushData* d = new wxCairoBrushData( this );
2388     d->CreateLinearGradientBrush(x1, y1, x2, y2, stops);
2389     p.SetRefData(d);
2390     return p;
2391 }
2392
2393 wxGraphicsBrush
2394 wxCairoRenderer::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2395                                            wxDouble xc, wxDouble yc, wxDouble r,
2396                                            const wxGraphicsGradientStops& stops)
2397 {
2398     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBrush);
2399     wxGraphicsBrush p;
2400     wxCairoBrushData* d = new wxCairoBrushData( this );
2401     d->CreateRadialGradientBrush(xo, yo, xc, yc, r, stops);
2402     p.SetRefData(d);
2403     return p;
2404 }
2405
2406 // sets the font
2407 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
2408 {
2409     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
2410     if ( font.IsOk() )
2411     {
2412         wxGraphicsFont p;
2413         p.SetRefData(new wxCairoFontData( this , font, col ));
2414         return p;
2415     }
2416     else
2417         return wxNullGraphicsFont;
2418 }
2419
2420 wxGraphicsBitmap wxCairoRenderer::CreateBitmap( const wxBitmap& bmp )
2421 {
2422     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2423     if ( bmp.IsOk() )
2424     {
2425         wxGraphicsBitmap p;
2426         p.SetRefData(new wxCairoBitmapData( this , bmp ));
2427         return p;
2428     }
2429     else
2430         return wxNullGraphicsBitmap;
2431 }
2432
2433 #if wxUSE_IMAGE
2434
2435 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromImage(const wxImage& image)
2436 {
2437     wxGraphicsBitmap bmp;
2438
2439     ENSURE_LOADED_OR_RETURN(bmp);
2440
2441     if ( image.IsOk() )
2442     {
2443         bmp.SetRefData(new wxCairoBitmapData(this, image));
2444     }
2445
2446     return bmp;
2447 }
2448
2449 #endif // wxUSE_IMAGE
2450
2451 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromNativeBitmap( void* bitmap )
2452 {
2453     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2454     if ( bitmap != NULL )
2455     {
2456         wxGraphicsBitmap p;
2457         p.SetRefData(new wxCairoBitmapData( this , (cairo_surface_t*) bitmap ));
2458         return p;
2459     }
2460     else
2461         return wxNullGraphicsBitmap;
2462 }
2463
2464 wxGraphicsBitmap
2465 wxCairoRenderer::CreateSubBitmap(const wxGraphicsBitmap& WXUNUSED(bitmap),
2466                                  wxDouble WXUNUSED(x),
2467                                  wxDouble WXUNUSED(y),
2468                                  wxDouble WXUNUSED(w),
2469                                  wxDouble WXUNUSED(h))
2470 {
2471     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
2472     wxFAIL_MSG("wxCairoRenderer::CreateSubBitmap is not implemented.");
2473     return wxNullGraphicsBitmap;
2474 }
2475
2476 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2477 {
2478     return &gs_cairoGraphicsRenderer;
2479 }
2480
2481 #else // !wxUSE_CAIRO
2482
2483 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2484 {
2485     return NULL;
2486 }
2487
2488 #endif  // wxUSE_CAIRO/!wxUSE_CAIRO
2489
2490 // MSW and OS X have their own native default renderers, but the other ports
2491 // use Cairo by default
2492 #if !(defined(__WXMSW__) || defined(__WXOSX__))
2493 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
2494 {
2495     return GetCairoRenderer();
2496 }
2497 #endif // !(__WXMSW__ || __WXOSX__)
2498
2499 #endif // wxUSE_GRAPHICS_CONTEXT