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/dc.h"
  21
  22 #ifndef WX_PRECOMP
  23 #include "wx/image.h"
  24 #include "wx/window.h"
  25 #include "wx/dc.h"
  26 #include "wx/utils.h"
  27 #include "wx/dialog.h"
  28 #include "wx/app.h"
  29 #include "wx/bitmap.h"
  30 #include "wx/dcmemory.h"
  31 #include "wx/log.h"
  32 #include "wx/icon.h"
  33 #include "wx/dcprint.h"
  34 #include "wx/module.h"
  35 #endif
  36
  37 #include "wx/private/graphics.h"
  38 #include "wx/rawbmp.h"
  39
  40 #include <vector>
  41
  42 using namespace std;
  43
  44 //-----------------------------------------------------------------------------
  45 // constants
  46 //-----------------------------------------------------------------------------
  47
  48 const double RAD2DEG = 180.0 / M_PI;
  49
  50 //-----------------------------------------------------------------------------
  51 // Local functions
  52 //-----------------------------------------------------------------------------
  53
  54 static inline double dmin(double a, double b)
  55 {
  56     return a < b ? a : b;
  57 }
  58 static inline double dmax(double a, double b)
  59 {
  60     return a > b ? a : b;
  61 }
  62
  63 static inline double DegToRad(double deg)
  64 {
  65     return (deg * M_PI) / 180.0;
  66 }
  67 static inline double RadToDeg(double deg)
  68 {
  69     return (deg * 180.0) / M_PI;
  70 }
  71
  72 //-----------------------------------------------------------------------------
  73 // device context implementation
  74 //
  75 // more and more of the dc functionality should be implemented by calling
  76 // the appropricate wxCairoContext, but we will have to do that step by step
  77 // also coordinate conversions should be moved to native matrix ops
  78 //-----------------------------------------------------------------------------
  79
  80 // we always stock two context states, one at entry, to be able to preserve the
  81 // state we were called with, the other one after changing to HI Graphics orientation
  82 // (this one is used for getting back clippings etc)
  83
  84 //-----------------------------------------------------------------------------
  85 // wxGraphicsPath implementation
  86 //-----------------------------------------------------------------------------
  87
  88 // TODO remove this dependency (gdiplus needs the macros)
  89
  90 #ifndef max
  91 #define max(a,b)            (((a) > (b)) ? (a) : (b))
  92 #endif
  93
  94 #ifndef min
  95 #define min(a,b)            (((a) < (b)) ? (a) : (b))
  96 #endif
  97
  98 #include <cairo.h>
  99 #ifdef __WXGTK__
 100 #include <gtk/gtk.h>
 101 #include "wx/fontutil.h"
 102 #include "wx/gtk/dc.h"
 103 #endif
 104
 105 #ifdef __WXMSW__
 106 #include <cairo-win32.h>
 107 #endif
 108
 109 #ifdef __WXMAC__
 110 #include "wx/osx/private.h"
 111 #include <cairo-quartz.h>
 112 #include <cairo-atsui.h>
 113 #endif
 114
 115 class WXDLLIMPEXP_CORE wxCairoPathData : public wxGraphicsPathData
 116 {
 117 public :
 118     wxCairoPathData(wxGraphicsRenderer* renderer, cairo_t* path = NULL);
 119     ~wxCairoPathData();
 120
 121     virtual wxGraphicsObjectRefData *Clone() const;
 122
 123     //
 124     // These are the path primitives from which everything else can be constructed
 125     //
 126
 127     // begins a new subpath at (x,y)
 128     virtual void MoveToPoint( wxDouble x, wxDouble y );
 129
 130     // adds a straight line from the current point to (x,y)
 131     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 132
 133     // adds a cubic Bezier curve from the current point, using two control points and an end point
 134     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 135
 136
 137     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 138     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 139
 140     // gets the last point of the current path, (0,0) if not yet set
 141     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 142
 143     // adds another path
 144     virtual void AddPath( const wxGraphicsPathData* path );
 145
 146     // closes the current sub-path
 147     virtual void CloseSubpath();
 148
 149     //
 150     // These are convenience functions which - if not available natively will be assembled
 151     // using the primitives from above
 152     //
 153
 154     /*
 155
 156     // appends a rectangle as a new closed subpath
 157     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 158     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 159     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 160
 161     // 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)
 162     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 163     */
 164
 165     // returns the native path
 166     virtual void * GetNativePath() const ;
 167
 168     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 169     virtual void UnGetNativePath(void *p) const;
 170
 171     // transforms each point of this path by the matrix
 172     virtual void Transform( const wxGraphicsMatrixData* matrix ) ;
 173
 174     // gets the bounding box enclosing all points (possibly including control points)
 175     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
 176
 177     virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxWINDING_RULE) const;
 178
 179 private :
 180     cairo_t* m_pathContext;
 181 };
 182
 183 class WXDLLIMPEXP_CORE wxCairoMatrixData : public wxGraphicsMatrixData
 184 {
 185 public :
 186     wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix = NULL ) ;
 187     virtual ~wxCairoMatrixData() ;
 188
 189     virtual wxGraphicsObjectRefData *Clone() const ;
 190
 191     // concatenates the matrix
 192     virtual void Concat( const wxGraphicsMatrixData *t );
 193
 194     // sets the matrix to the respective values
 195     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 196         wxDouble tx=0.0, wxDouble ty=0.0);
 197
 198     // gets the component valuess of the matrix
 199     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
 200                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
 201
 202     // makes this the inverse matrix
 203     virtual void Invert();
 204
 205     // returns true if the elements of the transformation matrix are equal ?
 206     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
 207
 208     // return true if this is the identity matrix
 209     virtual bool IsIdentity() const;
 210
 211     //
 212     // transformation
 213     //
 214
 215     // add the translation to this matrix
 216     virtual void Translate( wxDouble dx , wxDouble dy );
 217
 218     // add the scale to this matrix
 219     virtual void Scale( wxDouble xScale , wxDouble yScale );
 220
 221     // add the rotation to this matrix (radians)
 222     virtual void Rotate( wxDouble angle );
 223
 224     //
 225     // apply the transforms
 226     //
 227
 228     // applies that matrix to the point
 229     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 230
 231     // applies the matrix except for translations
 232     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 233
 234     // returns the native representation
 235     virtual void * GetNativeMatrix() const;
 236 private:
 237     cairo_matrix_t m_matrix ;
 238 } ;
 239
 240 class WXDLLIMPEXP_CORE wxCairoPenData : public wxGraphicsObjectRefData
 241 {
 242 public:
 243     wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 244     ~wxCairoPenData();
 245
 246     void Init();
 247
 248     virtual void Apply( wxGraphicsContext* context );
 249     virtual wxDouble GetWidth() { return m_width; }
 250
 251 private :
 252     double m_width;
 253
 254     double m_red;
 255     double m_green;
 256     double m_blue;
 257     double m_alpha;
 258
 259     cairo_line_cap_t m_cap;
 260     cairo_line_join_t m_join;
 261
 262     int m_count;
 263     const double *m_lengths;
 264     double *m_userLengths;
 265
 266     wxPen m_pen;
 267 };
 268
 269 class WXDLLIMPEXP_CORE wxCairoBrushData : public wxGraphicsObjectRefData
 270 {
 271 public:
 272     wxCairoBrushData( wxGraphicsRenderer* renderer );
 273     wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 274     ~wxCairoBrushData ();
 275
 276     virtual void Apply( wxGraphicsContext* context );
 277     void CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 278         const wxColour&c1, const wxColour&c2 );
 279     void CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 280         const wxColour &oColor, const wxColour &cColor );
 281
 282 protected:
 283     virtual void Init();
 284
 285 private :
 286     double m_red;
 287     double m_green;
 288     double m_blue;
 289     double m_alpha;
 290
 291     cairo_pattern_t* m_brushPattern;
 292 };
 293
 294 class wxCairoFontData : public wxGraphicsObjectRefData
 295 {
 296 public:
 297     wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col );
 298     ~wxCairoFontData();
 299
 300     virtual void Apply( wxGraphicsContext* context );
 301 #ifdef __WXGTK__
 302     const PangoFontDescription* GetFont() const { return m_font; }
 303 #endif
 304 private :
 305     double m_size;
 306     double m_red;
 307     double m_green;
 308     double m_blue;
 309     double m_alpha;
 310 #ifdef __WXMAC__
 311     cairo_font_face_t *m_font;
 312 #elif defined(__WXGTK__)
 313     PangoFontDescription* m_font;
 314 #else
 315     wxCharBuffer m_fontName;
 316     cairo_font_slant_t m_slant;
 317     cairo_font_weight_t m_weight;
 318 #endif
 319 };
 320
 321 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
 322 {
 323     DECLARE_NO_COPY_CLASS(wxCairoContext)
 324
 325 public:
 326     wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc );
 327     wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc );
 328     wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc );
 329 #ifdef __WXGTK__
 330     wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable );
 331 #endif
 332     wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context );
 333     wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window);
 334     wxCairoContext();
 335     virtual ~wxCairoContext();
 336
 337     virtual bool ShouldOffset() const
 338     {
 339         int penwidth = 0 ;
 340         if ( !m_pen.IsNull() )
 341         {
 342             penwidth = (int)((wxCairoPenData*)m_pen.GetRefData())->GetWidth();
 343             if ( penwidth == 0 )
 344                 penwidth = 1;
 345         }
 346         return ( penwidth % 2 ) == 1;
 347     }
 348
 349     virtual void Clip( const wxRegion &region );
 350
 351     // clips drawings to the rect
 352     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 353
 354     // resets the clipping to original extent
 355     virtual void ResetClip();
 356
 357     virtual void * GetNativeContext();
 358
 359     virtual bool SetLogicalFunction( int function );
 360
 361     virtual void StrokePath( const wxGraphicsPath& p );
 362     virtual void FillPath( const wxGraphicsPath& p , int fillStyle = wxWINDING_RULE );
 363
 364     virtual void Translate( wxDouble dx , wxDouble dy );
 365     virtual void Scale( wxDouble xScale , wxDouble yScale );
 366     virtual void Rotate( wxDouble angle );
 367
 368     // concatenates this transform with the current transform of this context
 369     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 370
 371     // sets the transform of this context
 372     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 373
 374     // gets the matrix of this context
 375     virtual wxGraphicsMatrix GetTransform() const;
 376
 377     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 378     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 379     virtual void PushState();
 380     virtual void PopState();
 381
 382     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y);
 383     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 384                                 wxDouble *descent, wxDouble *externalLeading ) const;
 385     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 386
 387 private:
 388     void Init(cairo_t *context);
 389
 390     cairo_t* m_context;
 391 };
 392
 393 //-----------------------------------------------------------------------------
 394 // wxCairoPenData implementation
 395 //-----------------------------------------------------------------------------
 396
 397 wxCairoPenData::~wxCairoPenData()
 398 {
 399     delete[] m_userLengths;
 400 }
 401
 402 void wxCairoPenData::Init()
 403 {
 404     m_lengths = NULL;
 405     m_userLengths = NULL;
 406     m_width = 0;
 407     m_count = 0;
 408 }
 409
 410 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 411 : wxGraphicsObjectRefData(renderer)
 412 {
 413     Init();
 414     m_pen = pen;
 415     m_width = m_pen.GetWidth();
 416     if (m_width <= 0.0)
 417         m_width = 0.1;
 418
 419     m_red = m_pen.GetColour().Red()/255.0;
 420     m_green = m_pen.GetColour().Green()/255.0;
 421     m_blue = m_pen.GetColour().Blue()/255.0;
 422     m_alpha = m_pen.GetColour().Alpha()/255.0;
 423
 424     switch ( m_pen.GetCap() )
 425     {
 426     case wxCAP_ROUND :
 427         m_cap = CAIRO_LINE_CAP_ROUND;
 428         break;
 429
 430     case wxCAP_PROJECTING :
 431         m_cap = CAIRO_LINE_CAP_SQUARE;
 432         break;
 433
 434     case wxCAP_BUTT :
 435         m_cap = CAIRO_LINE_CAP_BUTT;
 436         break;
 437
 438     default :
 439         m_cap = CAIRO_LINE_CAP_BUTT;
 440         break;
 441     }
 442
 443     switch ( m_pen.GetJoin() )
 444     {
 445     case wxJOIN_BEVEL :
 446         m_join = CAIRO_LINE_JOIN_BEVEL;
 447         break;
 448
 449     case wxJOIN_MITER :
 450         m_join = CAIRO_LINE_JOIN_MITER;
 451         break;
 452
 453     case wxJOIN_ROUND :
 454         m_join = CAIRO_LINE_JOIN_ROUND;
 455         break;
 456
 457     default :
 458         m_join = CAIRO_LINE_JOIN_MITER;
 459         break;
 460     }
 461
 462     const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
 463     const double dotted[] =
 464     {
 465         dashUnit , dashUnit + 2.0
 466     };
 467     static const double short_dashed[] =
 468     {
 469         9.0 , 6.0
 470     };
 471     static const double dashed[] =
 472     {
 473         19.0 , 9.0
 474     };
 475     static const double dotted_dashed[] =
 476     {
 477         9.0 , 6.0 , 3.0 , 3.0
 478     };
 479
 480     switch ( m_pen.GetStyle() )
 481     {
 482     case wxPENSTYLE_SOLID :
 483         break;
 484
 485     case wxPENSTYLE_DOT :
 486         m_count = WXSIZEOF(dotted);
 487         m_userLengths = new double[ m_count ] ;
 488         memcpy( m_userLengths, dotted, sizeof(dotted) );
 489         m_lengths = m_userLengths;
 490         break;
 491
 492     case wxPENSTYLE_LONG_DASH :
 493         m_lengths = dashed ;
 494         m_count = WXSIZEOF(dashed);
 495         break;
 496
 497     case wxPENSTYLE_SHORT_DASH :
 498         m_lengths = short_dashed ;
 499         m_count = WXSIZEOF(short_dashed);
 500         break;
 501
 502     case wxPENSTYLE_DOT_DASH :
 503         m_lengths = dotted_dashed ;
 504         m_count = WXSIZEOF(dotted_dashed);
 505         break;
 506
 507     case wxPENSTYLE_USER_DASH :
 508         {
 509             wxDash *wxdashes ;
 510             m_count = m_pen.GetDashes( &wxdashes ) ;
 511             if ((wxdashes != NULL) && (m_count > 0))
 512             {
 513                 m_userLengths = new double[m_count] ;
 514                 for ( int i = 0 ; i < m_count ; ++i )
 515                 {
 516                     m_userLengths[i] = wxdashes[i] * dashUnit ;
 517
 518                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 519                         m_userLengths[i] = dashUnit + 2.0 ;
 520                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 521                         m_userLengths[i] = dashUnit ;
 522                 }
 523             }
 524             m_lengths = m_userLengths ;
 525         }
 526         break;
 527     case wxPENSTYLE_STIPPLE :
 528         {
 529             /*
 530             wxBitmap* bmp = pen.GetStipple();
 531             if ( bmp && bmp->Ok() )
 532             {
 533             wxDELETE( m_penImage );
 534             wxDELETE( m_penBrush );
 535             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 536             m_penBrush = new TextureBrush(m_penImage);
 537             m_pen->SetBrush( m_penBrush );
 538             }
 539             */
 540         }
 541         break;
 542     default :
 543         if ( m_pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH
 544             && m_pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
 545         {
 546             /*
 547             wxDELETE( m_penBrush );
 548             HatchStyle style = HatchStyleHorizontal;
 549             switch( pen.GetStyle() )
 550             {
 551             case wxPENSTYLE_BDIAGONAL_HATCH :
 552             style = HatchStyleBackwardDiagonal;
 553             break ;
 554             case wxPENSTYLE_CROSSDIAG_HATCH :
 555             style = HatchStyleDiagonalCross;
 556             break ;
 557             case wxPENSTYLE_FDIAGONAL_HATCH :
 558             style = HatchStyleForwardDiagonal;
 559             break ;
 560             case wxPENSTYLE_CROSS_HATCH :
 561             style = HatchStyleCross;
 562             break ;
 563             case wxPENSTYLE_HORIZONTAL_HATCH :
 564             style = HatchStyleHorizontal;
 565             break ;
 566             case wxPENSTYLE_VERTICAL_HATCH :
 567             style = HatchStyleVertical;
 568             break ;
 569
 570             }
 571             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 572             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 573             m_pen->SetBrush( m_penBrush )
 574             */
 575         }
 576         break;
 577     }
 578 }
 579
 580 void wxCairoPenData::Apply( wxGraphicsContext* context )
 581 {
 582     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 583     cairo_set_line_width(ctext,m_width);
 584     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 585     cairo_set_line_cap(ctext,m_cap);
 586     cairo_set_line_join(ctext,m_join);
 587     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 588 }
 589
 590 //-----------------------------------------------------------------------------
 591 // wxCairoBrushData implementation
 592 //-----------------------------------------------------------------------------
 593
 594 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 595   : wxGraphicsObjectRefData( renderer )
 596 {
 597     Init();
 598 }
 599
 600 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
 601   : wxGraphicsObjectRefData(renderer)
 602 {
 603     Init();
 604
 605     m_red = brush.GetColour().Red()/255.0;
 606     m_green = brush.GetColour().Green()/255.0;
 607     m_blue = brush.GetColour().Blue()/255.0;
 608     m_alpha = brush.GetColour().Alpha()/255.0;
 609     /*
 610     if ( brush.GetStyle() == wxBRUSHSTYLE_SOLID)
 611     {
 612     m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 613     brush.GetColour().Green() , brush.GetColour().Blue() ) );
 614     }
 615     else if ( brush.IsHatch() )
 616     {
 617     HatchStyle style = HatchStyleHorizontal;
 618     switch( brush.GetStyle() )
 619     {
 620     case wxBRUSHSTYLE_BDIAGONAL_HATCH :
 621     style = HatchStyleBackwardDiagonal;
 622     break ;
 623     case wxBRUSHSTYLE_CROSSDIAG_HATCH :
 624     style = HatchStyleDiagonalCross;
 625     break ;
 626     case wxBRUSHSTYLE_FDIAGONAL_HATCH :
 627     style = HatchStyleForwardDiagonal;
 628     break ;
 629     case wxBRUSHSTYLE_CROSS_HATCH :
 630     style = HatchStyleCross;
 631     break ;
 632     case wxBRUSHSTYLE_HORIZONTAL_HATCH :
 633     style = HatchStyleHorizontal;
 634     break ;
 635     case wxBRUSHSTYLE_VERTICAL_HATCH :
 636     style = HatchStyleVertical;
 637     break ;
 638
 639     }
 640     m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 641     brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 642     }
 643     else
 644     {
 645     wxBitmap* bmp = brush.GetStipple();
 646     if ( bmp && bmp->Ok() )
 647     {
 648     wxDELETE( m_brushImage );
 649     m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 650     m_brush = new TextureBrush(m_brushImage);
 651     }
 652     }
 653     */
 654 }
 655
 656 wxCairoBrushData::~wxCairoBrushData ()
 657 {
 658     if (m_brushPattern)
 659         cairo_pattern_destroy(m_brushPattern);
 660 }
 661
 662 void wxCairoBrushData::Apply( wxGraphicsContext* context )
 663 {
 664     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 665     if ( m_brushPattern )
 666     {
 667         cairo_set_source(ctext,m_brushPattern);
 668     }
 669     else
 670     {
 671         cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 672     }
 673 }
 674
 675 void wxCairoBrushData::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 676         const wxColour&c1, const wxColour&c2 )
 677 {
 678     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 679     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,c1.Red()/255.0,
 680         c1.Green()/255.0, c1.Blue()/255.0,c1.Alpha()/255.0);
 681     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,c2.Red()/255.0,
 682         c2.Green()/255.0, c2.Blue()/255.0,c2.Alpha()/255.0);
 683     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 684 }
 685
 686 void wxCairoBrushData::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 687         const wxColour &oColor, const wxColour &cColor )
 688 {
 689     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 690     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,oColor.Red()/255.0,
 691         oColor.Green()/255.0, oColor.Blue()/255.0,oColor.Alpha()/255.0);
 692     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,cColor.Red()/255.0,
 693         cColor.Green()/255.0, cColor.Blue()/255.0,cColor.Alpha()/255.0);
 694     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 695 }
 696
 697 void wxCairoBrushData::Init()
 698 {
 699     m_brushPattern = NULL;
 700 }
 701
 702 //-----------------------------------------------------------------------------
 703 // wxCairoFontData implementation
 704 //-----------------------------------------------------------------------------
 705
 706 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 707                          const wxColour& col ) : wxGraphicsObjectRefData(renderer)
 708 {
 709     m_red = col.Red()/255.0;
 710     m_green = col.Green()/255.0;
 711     m_blue = col.Blue()/255.0;
 712     m_alpha = col.Alpha()/255.0;
 713     m_size = font.GetPointSize();
 714
 715 #ifdef __WXMAC__
 716     m_font = cairo_atsui_font_face_create_for_atsu_font_id( font.MacGetATSUFontID() );
 717 #elif defined(__WXGTK__)
 718     m_font = pango_font_description_copy( font.GetNativeFontInfo()->description );
 719 #else
 720     m_fontName = font.GetFaceName().mb_str(wxConvUTF8);
 721     m_slant = font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL;
 722     m_weight = font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL;
 723 #endif
 724 }
 725
 726 wxCairoFontData::~wxCairoFontData()
 727 {
 728 #ifdef __WXMAC__
 729     cairo_font_face_destroy( m_font );
 730 #elif defined(__WXGTK__)
 731     pango_font_description_free( m_font );
 732 #else
 733 #endif
 734 }
 735
 736 void wxCairoFontData::Apply( wxGraphicsContext* context )
 737 {
 738     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 739     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 740 #ifdef __WXGTK__
 741     // the rest is done using Pango layouts
 742 #elif defined(__WXMAC__)
 743     cairo_set_font_face(ctext, m_font);
 744     cairo_set_font_size(ctext, m_size );
 745 #else
 746     cairo_select_font_face(ctext, m_fontName, m_slant, m_weights );
 747     cairo_set_font_size(ctext, m_size );
 748 #endif
 749 }
 750
 751 //-----------------------------------------------------------------------------
 752 // wxCairoPathData implementation
 753 //-----------------------------------------------------------------------------
 754
 755 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
 756     : wxGraphicsPathData(renderer)
 757 {
 758     if (pathcontext)
 759     {
 760         m_pathContext = pathcontext;
 761     }
 762     else
 763     {
 764         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 765         m_pathContext = cairo_create(surface);
 766         cairo_surface_destroy (surface);
 767     }
 768 }
 769
 770 wxCairoPathData::~wxCairoPathData()
 771 {
 772     cairo_destroy(m_pathContext);
 773 }
 774
 775 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
 776 {
 777     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 778     cairo_t* pathcontext = cairo_create(surface);
 779     cairo_surface_destroy (surface);
 780
 781     cairo_path_t* path = cairo_copy_path(m_pathContext);
 782     cairo_append_path(pathcontext, path);
 783     cairo_path_destroy(path);
 784     return new wxCairoPathData( GetRenderer() ,pathcontext);
 785 }
 786
 787
 788 void* wxCairoPathData::GetNativePath() const
 789 {
 790     return cairo_copy_path(m_pathContext) ;
 791 }
 792
 793 void wxCairoPathData::UnGetNativePath(void *p) const
 794 {
 795     cairo_path_destroy((cairo_path_t*)p);
 796 }
 797
 798 //
 799 // The Primitives
 800 //
 801
 802 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
 803 {
 804     cairo_move_to(m_pathContext,x,y);
 805 }
 806
 807 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
 808 {
 809     cairo_line_to(m_pathContext,x,y);
 810 }
 811
 812 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
 813 {
 814     cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
 815     cairo_append_path(m_pathContext, p);
 816     UnGetNativePath(p);
 817 }
 818
 819 void wxCairoPathData::CloseSubpath()
 820 {
 821     cairo_close_path(m_pathContext);
 822 }
 823
 824 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 825 {
 826     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
 827 }
 828
 829 // gets the last point of the current path, (0,0) if not yet set
 830 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
 831 {
 832     double dx,dy;
 833     cairo_get_current_point(m_pathContext,&dx,&dy);
 834     if (x)
 835         *x = dx;
 836     if (y)
 837         *y = dy;
 838 }
 839
 840 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 841 {
 842     // as clockwise means positive in our system (y pointing downwards)
 843     // TODO make this interpretation dependent of the
 844     // real device trans
 845     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
 846         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
 847     else
 848         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
 849 }
 850
 851 // transforms each point of this path by the matrix
 852 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
 853 {
 854     // as we don't have a true path object, we have to apply the inverse
 855     // matrix to the context
 856     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
 857     cairo_matrix_invert( &m );
 858     cairo_transform(m_pathContext,&m);
 859 }
 860
 861 // gets the bounding box enclosing all points (possibly including control points)
 862 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
 863 {
 864     double x1,y1,x2,y2;
 865
 866     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
 867     if ( x2 < x1 )
 868     {
 869         *x = x2;
 870         *w = x1-x2;
 871     }
 872     else
 873     {
 874         *x = x1;
 875         *w = x2-x1;
 876     }
 877
 878     if( y2 < y1 )
 879     {
 880         *y = y2;
 881         *h = y1-y2;
 882     }
 883     else
 884     {
 885         *y = y1;
 886         *h = y2-y1;
 887     }
 888 }
 889
 890 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, int WXUNUSED(fillStyle) ) const
 891 {
 892     return cairo_in_stroke( m_pathContext, x, y) != 0;
 893 }
 894
 895 //-----------------------------------------------------------------------------
 896 // wxCairoMatrixData implementation
 897 //-----------------------------------------------------------------------------
 898
 899 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
 900     : wxGraphicsMatrixData(renderer)
 901 {
 902     if ( matrix )
 903         m_matrix = *matrix;
 904 }
 905
 906 wxCairoMatrixData::~wxCairoMatrixData()
 907 {
 908     // nothing to do
 909 }
 910
 911 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
 912 {
 913     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
 914 }
 915
 916 // concatenates the matrix
 917 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
 918 {
 919     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
 920 }
 921
 922 // sets the matrix to the respective values
 923 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
 924                         wxDouble tx, wxDouble ty)
 925 {
 926     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
 927 }
 928
 929 // gets the component valuess of the matrix
 930 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
 931                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
 932 {
 933     if (a)  *a = m_matrix.xx;
 934     if (b)  *b = m_matrix.yx;
 935     if (c)  *c = m_matrix.xy;
 936     if (d)  *d = m_matrix.yy;
 937     if (tx) *tx= m_matrix.x0;
 938     if (ty) *ty= m_matrix.y0;
 939 }
 940
 941 // makes this the inverse matrix
 942 void wxCairoMatrixData::Invert()
 943 {
 944     cairo_matrix_invert( &m_matrix );
 945 }
 946
 947 // returns true if the elements of the transformation matrix are equal ?
 948 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
 949 {
 950     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
 951     return (
 952         m_matrix.xx == tm->xx &&
 953         m_matrix.yx == tm->yx &&
 954         m_matrix.xy == tm->xy &&
 955         m_matrix.yy == tm->yy &&
 956         m_matrix.x0 == tm->x0 &&
 957         m_matrix.y0 == tm->y0 ) ;
 958 }
 959
 960 // return true if this is the identity matrix
 961 bool wxCairoMatrixData::IsIdentity() const
 962 {
 963     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
 964         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
 965 }
 966
 967 //
 968 // transformation
 969 //
 970
 971 // add the translation to this matrix
 972 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
 973 {
 974     cairo_matrix_translate( &m_matrix, dx, dy) ;
 975 }
 976
 977 // add the scale to this matrix
 978 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
 979 {
 980     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
 981 }
 982
 983 // add the rotation to this matrix (radians)
 984 void wxCairoMatrixData::Rotate( wxDouble angle )
 985 {
 986     cairo_matrix_rotate( &m_matrix, angle) ;
 987 }
 988
 989 //
 990 // apply the transforms
 991 //
 992
 993 // applies that matrix to the point
 994 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
 995 {
 996     double lx = *x, ly = *y ;
 997     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
 998     *x = lx;
 999     *y = ly;
1000 }
1001
1002 // applies the matrix except for translations
1003 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1004 {
1005     double lx = *dx, ly = *dy ;
1006     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1007     *dx = lx;
1008     *dy = ly;
1009 }
1010
1011 // returns the native representation
1012 void * wxCairoMatrixData::GetNativeMatrix() const
1013 {
1014     return (void*) &m_matrix;
1015 }
1016
1017 //-----------------------------------------------------------------------------
1018 // wxCairoContext implementation
1019 //-----------------------------------------------------------------------------
1020
1021 class wxCairoOffsetHelper
1022 {
1023 public :
1024     wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1025     {
1026         m_ctx = ctx;
1027         m_offset = offset;
1028         if ( m_offset )
1029              cairo_translate( m_ctx, 0.5, 0.5 );
1030     }
1031     ~wxCairoOffsetHelper( )
1032     {
1033         if ( m_offset )
1034             cairo_translate( m_ctx, -0.5, -0.5 );
1035     }
1036 public :
1037     cairo_t* m_ctx;
1038     bool m_offset;
1039 } ;
1040
1041 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1042 : wxGraphicsContext(renderer)
1043 {
1044 #ifdef __WXGTK20__
1045     const wxDCImpl *impl = dc.GetImpl();
1046     Init( (cairo_t*) impl->GetCairoContext() );
1047
1048     wxPoint org = dc.GetDeviceOrigin();
1049     cairo_translate( m_context, org.x, org.y );
1050
1051     double sx,sy;
1052     dc.GetUserScale( &sx, &sy );
1053     cairo_scale( m_context, sx, sy );
1054
1055     org = dc.GetLogicalOrigin();
1056     cairo_translate( m_context, -org.x, -org.y );
1057 #endif
1058 }
1059
1060 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1061 : wxGraphicsContext(renderer)
1062 {
1063 #ifdef __WXGTK20__
1064     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1065     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1066
1067 #if 0
1068     wxGraphicsMatrix matrix = CreateMatrix();
1069
1070     wxPoint org = dc.GetDeviceOrigin();
1071     matrix.Translate( org.x, org.y );
1072
1073     org = dc.GetLogicalOrigin();
1074     matrix.Translate( -org.x, -org.y );
1075
1076     double sx,sy;
1077     dc.GetUserScale( &sx, &sy );
1078     matrix.Scale( sx, sy );
1079
1080     ConcatTransform( matrix );
1081 #endif
1082 #endif
1083
1084 #ifdef __WXMAC__
1085     int width, height;
1086     dc.GetSize( &width, &height );
1087     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1088     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1089     Init( cairo_create( surface ) );
1090     cairo_surface_destroy( surface );
1091 #endif
1092 }
1093
1094 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1095 : wxGraphicsContext(renderer)
1096 {
1097 #ifdef __WXGTK20__
1098     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1099     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1100
1101 #if 0
1102     wxGraphicsMatrix matrix = CreateMatrix();
1103
1104     wxPoint org = dc.GetDeviceOrigin();
1105     matrix.Translate( org.x, org.y );
1106
1107     org = dc.GetLogicalOrigin();
1108     matrix.Translate( -org.x, -org.y );
1109
1110     double sx,sy;
1111     dc.GetUserScale( &sx, &sy );
1112     matrix.Scale( sx, sy );
1113
1114     ConcatTransform( matrix );
1115 #endif
1116 #endif
1117
1118 #ifdef __WXMAC__
1119     int width, height;
1120     dc.GetSize( &width, &height );
1121     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1122     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1123     Init( cairo_create( surface ) );
1124     cairo_surface_destroy( surface );
1125 #endif
1126 }
1127
1128 #ifdef __WXGTK20__
1129 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
1130 : wxGraphicsContext(renderer)
1131 {
1132     Init( gdk_cairo_create( drawable ) );
1133 }
1134 #endif
1135
1136 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1137 : wxGraphicsContext(renderer)
1138 {
1139     Init( context );
1140 }
1141
1142 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1143 : wxGraphicsContext(renderer)
1144 {
1145 #ifdef __WXGTK__
1146     // something along these lines (copied from dcclient)
1147
1148     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1149     // code should still be able to create wxClientDCs for them, so we will
1150     // use the parent window here then.
1151     if (window->m_wxwindow == NULL)
1152     {
1153         window = window->GetParent();
1154     }
1155
1156     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1157
1158     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1159 #endif
1160 }
1161
1162 wxCairoContext::~wxCairoContext()
1163 {
1164     if ( m_context )
1165     {
1166         PopState();
1167         PopState();
1168         cairo_destroy(m_context);
1169     }
1170 }
1171
1172 void wxCairoContext::Init(cairo_t *context)
1173 {
1174     m_context = context ;
1175     PushState();
1176     PushState();
1177 }
1178
1179
1180 void wxCairoContext::Clip( const wxRegion& region )
1181 {
1182     // Create a path with all the rectangles in the region
1183     wxGraphicsPath path = GetRenderer()->CreatePath();
1184     wxRegionIterator ri(region);
1185     while (ri)
1186     {
1187         path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1188         ++ri;
1189     }
1190
1191     // Put it in the context
1192     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1193     cairo_append_path(m_context, cp);
1194
1195     // clip to that path
1196     cairo_clip(m_context);
1197     path.UnGetNativePath(cp);
1198 }
1199
1200 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1201 {
1202     // Create a path with this rectangle
1203     wxGraphicsPath path = GetRenderer()->CreatePath();
1204     path.AddRectangle(x,y,w,h);
1205
1206     // Put it in the context
1207     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1208     cairo_append_path(m_context, cp);
1209
1210     // clip to that path
1211     cairo_clip(m_context);
1212     path.UnGetNativePath(cp);
1213 }
1214
1215 void wxCairoContext::ResetClip()
1216 {
1217     cairo_reset_clip(m_context);
1218 }
1219
1220
1221 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1222 {
1223     if ( !m_pen.IsNull() )
1224     {
1225         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1226         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1227         cairo_append_path(m_context,cp);
1228         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1229         cairo_stroke(m_context);
1230         path.UnGetNativePath(cp);
1231     }
1232 }
1233
1234 void wxCairoContext::FillPath( const wxGraphicsPath& path , int fillStyle )
1235 {
1236     if ( !m_brush.IsNull() )
1237     {
1238         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1239         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1240         cairo_append_path(m_context,cp);
1241         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1242         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1243         cairo_fill(m_context);
1244         path.UnGetNativePath(cp);
1245     }
1246 }
1247
1248 void wxCairoContext::Rotate( wxDouble angle )
1249 {
1250     cairo_rotate(m_context,angle);
1251 }
1252
1253 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1254 {
1255     cairo_translate(m_context,dx,dy);
1256 }
1257
1258 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1259 {
1260     cairo_scale(m_context,xScale,yScale);
1261 }
1262
1263 // concatenates this transform with the current transform of this context
1264 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1265 {
1266     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1267 }
1268
1269 // sets the transform of this context
1270 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1271 {
1272     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1273 }
1274
1275 // gets the matrix of this context
1276 wxGraphicsMatrix wxCairoContext::GetTransform() const
1277 {
1278     wxGraphicsMatrix matrix = CreateMatrix();
1279     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1280     return matrix;
1281 }
1282
1283
1284
1285 void wxCairoContext::PushState()
1286 {
1287     cairo_save(m_context);
1288 }
1289
1290 void wxCairoContext::PopState()
1291 {
1292     cairo_restore(m_context);
1293 }
1294
1295 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1296 {
1297     wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1298
1299     cairo_surface_t* surface;
1300     int bw = bmp.GetWidth();
1301     int bh = bmp.GetHeight();
1302     wxBitmap bmpSource = bmp;  // we need a non-const instance
1303     unsigned char* buffer = new unsigned char[bw*bh*4];
1304     wxUint32* data = (wxUint32*)buffer;
1305
1306     // Create a surface object and copy the bitmap pixel data to it.  if the
1307     // image has alpha (or a mask represented as alpha) then we'll use a
1308     // different format and iterator than if it doesn't...
1309     if (bmpSource.HasAlpha() || bmpSource.GetMask())
1310     {
1311         surface = cairo_image_surface_create_for_data(
1312             buffer, CAIRO_FORMAT_ARGB32, bw, bh, bw*4);
1313         wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1314         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1315
1316         wxAlphaPixelData::Iterator p(pixData);
1317         for (int y=0; y<bh; y++)
1318         {
1319             wxAlphaPixelData::Iterator rowStart = p;
1320             for (int x=0; x<bw; x++)
1321             {
1322                 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1323                 // with alpha in the upper 8 bits, then red, then green, then
1324                 // blue. The 32-bit quantities are stored native-endian.
1325                 // Pre-multiplied alpha is used.
1326                 unsigned char alpha = p.Alpha();
1327                 if (alpha == 0)
1328                     *data = 0;
1329                 else
1330                     *data = ( alpha                      << 24
1331                               | (p.Red() * alpha/255)    << 16
1332                               | (p.Green() * alpha/255)  <<  8
1333                               | (p.Blue() * alpha/255) );
1334                 ++data;
1335                 ++p;
1336             }
1337             p = rowStart;
1338             p.OffsetY(pixData, 1);
1339         }
1340     }
1341     else  // no alpha
1342     {
1343         surface = cairo_image_surface_create_for_data(
1344             buffer, CAIRO_FORMAT_RGB24, bw, bh, bw*4);
1345         wxNativePixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1346         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1347
1348         wxNativePixelData::Iterator p(pixData);
1349         for (int y=0; y<bh; y++)
1350         {
1351             wxNativePixelData::Iterator rowStart = p;
1352             for (int x=0; x<bw; x++)
1353             {
1354                 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1355                 // the upper 8 bits unused. Red, Green, and Blue are stored in
1356                 // the remaining 24 bits in that order.  The 32-bit quantities
1357                 // are stored native-endian.
1358                 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1359                 ++data;
1360                 ++p;
1361             }
1362             p = rowStart;
1363             p.OffsetY(pixData, 1);
1364         }
1365     }
1366
1367
1368     PushState();
1369
1370     // In case we're scaling the image by using a width and height different
1371     // than the bitmap's size create a pattern transformation on the surface and
1372     // draw the transformed pattern.
1373     cairo_pattern_t* pattern = cairo_pattern_create_for_surface(surface);
1374     wxDouble scaleX = w / bw;
1375     wxDouble scaleY = h / bh;
1376     cairo_scale(m_context, scaleX, scaleY);
1377
1378     // prepare to draw the image
1379     cairo_translate(m_context, x, y);
1380     cairo_set_source(m_context, pattern);
1381     // use the original size here since the context is scaled already...
1382     cairo_rectangle(m_context, 0, 0, bw, bh);
1383     // fill the rectangle using the pattern
1384     cairo_fill(m_context);
1385
1386     // clean up
1387     cairo_pattern_destroy(pattern);
1388     cairo_surface_destroy(surface);
1389     delete [] buffer;
1390     PopState();
1391 }
1392
1393 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1394 {
1395     // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
1396     // start using the Cairo backend on other platforms then we may need to
1397     // fiddle with this...
1398     DrawBitmap(icon, x, y, w, h);
1399 }
1400
1401
1402 void wxCairoContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
1403 {
1404     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::DrawText - no valid font set") );
1405
1406     if ( str.empty())
1407         return;
1408
1409 #ifdef __WXGTK__
1410     const wxCharBuffer data = str.utf8_str();
1411     if ( !data )
1412         return;
1413     size_t datalen = strlen(data);
1414     ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
1415
1416     PangoLayout *layout = pango_cairo_create_layout (m_context);
1417     pango_layout_set_font_description( layout, ((wxCairoFontData*)m_font.GetRefData())->GetFont());
1418     pango_layout_set_text(layout, data, datalen);
1419     cairo_move_to(m_context, x, y);
1420     pango_cairo_show_layout (m_context, layout);
1421
1422     g_object_unref (layout);
1423 #else
1424     ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
1425     // Cairo's x,y for drawing text is at the baseline, so we need to adjust
1426     // the position we move to by the ascent.
1427     cairo_font_extents_t fe;
1428     cairo_font_extents(m_context, &fe);
1429     cairo_move_to(m_context, x, y+fe.ascent);
1430
1431     const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
1432     cairo_show_text(m_context,buf);
1433 #endif
1434 }
1435
1436 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1437                                     wxDouble *descent, wxDouble *externalLeading ) const
1438 {
1439     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
1440
1441     if ( width )
1442         *width = 0;
1443     if ( height )
1444         *height = 0;
1445     if ( descent )
1446         *descent = 0;
1447     if ( externalLeading )
1448         *externalLeading = 0;
1449
1450     if ( str.empty())
1451         return;
1452
1453 #ifdef __WXGTK__
1454     int w, h;
1455
1456     PangoLayout *layout = pango_cairo_create_layout (m_context);
1457     pango_layout_set_font_description( layout, ((wxCairoFontData*)m_font.GetRefData())->GetFont());
1458     const wxCharBuffer data = str.utf8_str();
1459     if ( !data )
1460     {
1461         return;
1462     }
1463     pango_layout_set_text( layout, data, strlen(data) );
1464     pango_layout_get_pixel_size (layout, &w, &h);
1465     if ( width )
1466         *width = w;
1467     if ( height )
1468         *height = h;
1469     if (descent)
1470     {
1471         PangoLayoutIter *iter = pango_layout_get_iter(layout);
1472         int baseline = pango_layout_iter_get_baseline(iter);
1473         pango_layout_iter_free(iter);
1474         *descent = h - PANGO_PIXELS(baseline);
1475     }
1476     g_object_unref (layout);
1477 #else
1478     ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this);
1479
1480     if (width)
1481     {
1482         const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
1483         cairo_text_extents_t te;
1484         cairo_text_extents(m_context, buf, &te);
1485         *width = te.width;
1486     }
1487
1488     if (height || descent || externalLeading)
1489     {
1490         cairo_font_extents_t fe;
1491         cairo_font_extents(m_context, &fe);
1492
1493         // some backends have negative descents
1494
1495         if ( fe.descent < 0 )
1496             fe.descent = -fe.descent;
1497
1498         if ( fe.height < (fe.ascent + fe.descent ) )
1499         {
1500             // some backends are broken re height ... (eg currently ATSUI)
1501             fe.height = fe.ascent + fe.descent;
1502         }
1503
1504         if (height)
1505             *height = fe.height;
1506         if ( descent )
1507             *descent = fe.descent;
1508         if ( externalLeading )
1509             *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
1510     }
1511 #endif
1512 }
1513
1514 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
1515 {
1516     widths.Empty();
1517     widths.Add(0, text.length());
1518
1519     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
1520
1521     if (text.empty())
1522         return;
1523
1524     // TODO
1525 }
1526
1527 void * wxCairoContext::GetNativeContext()
1528 {
1529     return m_context;
1530 }
1531
1532 // Cairo doesn't support bitwise logical function (a.k.a. ROP, raster output
1533 // mode). Cairo supports Porter-Duff compositing operators, but they are quite
1534 // different, although in some cases have similar names.
1535 bool wxCairoContext::SetLogicalFunction( int function )
1536 {
1537     if (m_logicalFunction == function)
1538         return true;
1539
1540     cairo_operator_t op;
1541
1542     switch ( function )
1543     {
1544         case wxCOPY:       // (default) src
1545             op = CAIRO_OPERATOR_OVER; // (also default)
1546             break;
1547         case wxOR:         // src OR dst
1548             op = CAIRO_OPERATOR_ADD;
1549             break;
1550         case wxNO_OP:      // dst
1551             op = CAIRO_OPERATOR_DEST; // ignore the source
1552             break;
1553         case wxCLEAR:      // 0
1554             op = CAIRO_OPERATOR_CLEAR;// clear dst
1555             break;
1556
1557         case wxAND:        // src AND dst
1558         case wxAND_INVERT: // (NOT src) AND dst
1559         case wxAND_REVERSE:// src AND (NOT dst)
1560         case wxEQUIV:      // (NOT src) XOR dst
1561         case wxINVERT:     // NOT dst
1562         case wxNAND:       // (NOT src) OR (NOT dst)
1563         case wxNOR:        // (NOT src) AND (NOT dst)
1564         case wxOR_INVERT:  // (NOT src) OR dst
1565         case wxOR_REVERSE: // src OR (NOT dst)
1566         case wxSET:        // 1
1567         case wxSRC_INVERT: // NOT src
1568         //wxXOR does _not_ correspond to CAIRO_OPERATOR_XOR
1569         case wxXOR:        // src XOR dst
1570         default:
1571             return false;
1572     }
1573
1574     m_logicalFunction = function;
1575     cairo_set_operator(m_context, op);
1576     return true;
1577 }
1578
1579
1580 //-----------------------------------------------------------------------------
1581 // wxCairoRenderer declaration
1582 //-----------------------------------------------------------------------------
1583
1584 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
1585 {
1586 public :
1587     wxCairoRenderer() {}
1588
1589     virtual ~wxCairoRenderer() {}
1590
1591     // Context
1592
1593     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
1594     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
1595     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
1596
1597     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
1598
1599     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
1600
1601     virtual wxGraphicsContext * CreateContext( wxWindow* window );
1602
1603     virtual wxGraphicsContext * CreateMeasuringContext();
1604
1605     // Path
1606
1607     virtual wxGraphicsPath CreatePath();
1608
1609     // Matrix
1610
1611     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
1612         wxDouble tx=0.0, wxDouble ty=0.0);
1613
1614
1615     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
1616
1617     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
1618
1619     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1620     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1621         const wxColour&c1, const wxColour&c2) ;
1622
1623     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1624     // with radius r and color cColor
1625     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1626         const wxColour &oColor, const wxColour &cColor) ;
1627
1628     // sets the font
1629     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
1630
1631     // create a native bitmap representation
1632 #if 0
1633     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap )
1634     {
1635       return wxGraphicsBitmap;
1636     }
1637
1638     // create a subimage from a native image representation
1639     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  )
1640     {
1641       return wxGraphicsBitmap;
1642     }
1643 #endif
1644
1645 private :
1646     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
1647 } ;
1648
1649 //-----------------------------------------------------------------------------
1650 // wxCairoRenderer implementation
1651 //-----------------------------------------------------------------------------
1652
1653 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
1654
1655 static wxCairoRenderer gs_cairoGraphicsRenderer;
1656 // temporary hack to allow creating a cairo context on any platform
1657 extern wxGraphicsRenderer* gCairoRenderer;
1658 wxGraphicsRenderer* gCairoRenderer = &gs_cairoGraphicsRenderer;
1659
1660 #ifdef __WXGTK__
1661 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
1662 {
1663     return &gs_cairoGraphicsRenderer;
1664 }
1665 #endif
1666
1667 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
1668 {
1669     return new wxCairoContext(this,dc);
1670 }
1671
1672 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
1673 {
1674     return new wxCairoContext(this,dc);
1675 }
1676
1677 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
1678 {
1679 #ifdef __WXGTK20__
1680     const wxDCImpl *impl = dc.GetImpl();
1681     cairo_t* context = (cairo_t*) impl->GetCairoContext();
1682     if (context)
1683        return new wxCairoContext(this,dc);
1684     else
1685 #endif
1686        return NULL;
1687 }
1688
1689 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
1690 {
1691     return new wxCairoContext(this,(cairo_t*)context);
1692 }
1693
1694
1695 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
1696 {
1697 #ifdef __WXGTK__
1698     return new wxCairoContext(this,(GdkDrawable*)window);
1699 #else
1700     return NULL;
1701 #endif
1702 }
1703
1704 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
1705 {
1706     return NULL;
1707     // TODO
1708 }
1709
1710 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
1711 {
1712     return new wxCairoContext(this, window );
1713 }
1714
1715 // Path
1716
1717 wxGraphicsPath wxCairoRenderer::CreatePath()
1718 {
1719     wxGraphicsPath path;
1720     path.SetRefData( new wxCairoPathData(this) );
1721     return path;
1722 }
1723
1724
1725 // Matrix
1726
1727 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1728                                                 wxDouble tx, wxDouble ty)
1729
1730 {
1731     wxGraphicsMatrix m;
1732     wxCairoMatrixData* data = new wxCairoMatrixData( this );
1733     data->Set( a,b,c,d,tx,ty ) ;
1734     m.SetRefData(data);
1735     return m;
1736 }
1737
1738 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
1739 {
1740     if ( !pen.Ok() || pen.GetStyle() == wxTRANSPARENT )
1741         return wxNullGraphicsPen;
1742     else
1743     {
1744         wxGraphicsPen p;
1745         p.SetRefData(new wxCairoPenData( this, pen ));
1746         return p;
1747     }
1748 }
1749
1750 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
1751 {
1752     if ( !brush.Ok() || brush.GetStyle() == wxTRANSPARENT )
1753         return wxNullGraphicsBrush;
1754     else
1755     {
1756         wxGraphicsBrush p;
1757         p.SetRefData(new wxCairoBrushData( this, brush ));
1758         return p;
1759     }
1760 }
1761
1762 // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1763 wxGraphicsBrush wxCairoRenderer::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1764                                                                       const wxColour&c1, const wxColour&c2)
1765 {
1766     wxGraphicsBrush p;
1767     wxCairoBrushData* d = new wxCairoBrushData( this );
1768     d->CreateLinearGradientBrush(x1, y1, x2, y2, c1, c2);
1769     p.SetRefData(d);
1770     return p;
1771 }
1772
1773 // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1774 // with radius r and color cColor
1775 wxGraphicsBrush wxCairoRenderer::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1776                                                                       const wxColour &oColor, const wxColour &cColor)
1777 {
1778     wxGraphicsBrush p;
1779     wxCairoBrushData* d = new wxCairoBrushData( this );
1780     d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,oColor,cColor);
1781     p.SetRefData(d);
1782     return p;
1783 }
1784
1785 // sets the font
1786 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
1787 {
1788     if ( font.Ok() )
1789     {
1790         wxGraphicsFont p;
1791         p.SetRefData(new wxCairoFontData( this , font, col ));
1792         return p;
1793     }
1794     else
1795         return wxNullGraphicsFont;
1796 }
1797
1798 #endif  // wxUSE_GRAPHICS_CONTEXT