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 wxSOLID :
 483         break;
 484
 485     case wxDOT :
 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 wxLONG_DASH :
 493         m_lengths = dashed ;
 494         m_count = WXSIZEOF(dashed);
 495         break;
 496
 497     case wxSHORT_DASH :
 498         m_lengths = short_dashed ;
 499         m_count = WXSIZEOF(short_dashed);
 500         break;
 501
 502     case wxDOT_DASH :
 503         m_lengths = dotted_dashed ;
 504         m_count = WXSIZEOF(dotted_dashed);
 505         break;
 506
 507     case wxUSER_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 wxSTIPPLE :
 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() >= wxFIRST_HATCH && m_pen.GetStyle() <= wxLAST_HATCH )
 544         {
 545             /*
 546             wxDELETE( m_penBrush );
 547             HatchStyle style = HatchStyleHorizontal;
 548             switch( pen.GetStyle() )
 549             {
 550             case wxBDIAGONAL_HATCH :
 551             style = HatchStyleBackwardDiagonal;
 552             break ;
 553             case wxCROSSDIAG_HATCH :
 554             style = HatchStyleDiagonalCross;
 555             break ;
 556             case wxFDIAGONAL_HATCH :
 557             style = HatchStyleForwardDiagonal;
 558             break ;
 559             case wxCROSS_HATCH :
 560             style = HatchStyleCross;
 561             break ;
 562             case wxHORIZONTAL_HATCH :
 563             style = HatchStyleHorizontal;
 564             break ;
 565             case wxVERTICAL_HATCH :
 566             style = HatchStyleVertical;
 567             break ;
 568
 569             }
 570             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 571             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 572             m_pen->SetBrush( m_penBrush )
 573             */
 574         }
 575         break;
 576     }
 577 }
 578
 579 void wxCairoPenData::Apply( wxGraphicsContext* context )
 580 {
 581     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 582     cairo_set_line_width(ctext,m_width);
 583     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 584     cairo_set_line_cap(ctext,m_cap);
 585     cairo_set_line_join(ctext,m_join);
 586     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 587 }
 588
 589 //-----------------------------------------------------------------------------
 590 // wxCairoBrushData implementation
 591 //-----------------------------------------------------------------------------
 592
 593 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 594   : wxGraphicsObjectRefData( renderer )
 595 {
 596     Init();
 597 }
 598
 599 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
 600   : wxGraphicsObjectRefData(renderer)
 601 {
 602     Init();
 603
 604     m_red = brush.GetColour().Red()/255.0;
 605     m_green = brush.GetColour().Green()/255.0;
 606     m_blue = brush.GetColour().Blue()/255.0;
 607     m_alpha = brush.GetColour().Alpha()/255.0;
 608     /*
 609     if ( brush.GetStyle() == wxSOLID)
 610     {
 611     m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 612     brush.GetColour().Green() , brush.GetColour().Blue() ) );
 613     }
 614     else if ( brush.IsHatch() )
 615     {
 616     HatchStyle style = HatchStyleHorizontal;
 617     switch( brush.GetStyle() )
 618     {
 619     case wxBDIAGONAL_HATCH :
 620     style = HatchStyleBackwardDiagonal;
 621     break ;
 622     case wxCROSSDIAG_HATCH :
 623     style = HatchStyleDiagonalCross;
 624     break ;
 625     case wxFDIAGONAL_HATCH :
 626     style = HatchStyleForwardDiagonal;
 627     break ;
 628     case wxCROSS_HATCH :
 629     style = HatchStyleCross;
 630     break ;
 631     case wxHORIZONTAL_HATCH :
 632     style = HatchStyleHorizontal;
 633     break ;
 634     case wxVERTICAL_HATCH :
 635     style = HatchStyleVertical;
 636     break ;
 637
 638     }
 639     m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 640     brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 641     }
 642     else
 643     {
 644     wxBitmap* bmp = brush.GetStipple();
 645     if ( bmp && bmp->Ok() )
 646     {
 647     wxDELETE( m_brushImage );
 648     m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 649     m_brush = new TextureBrush(m_brushImage);
 650     }
 651     }
 652     */
 653 }
 654
 655 wxCairoBrushData::~wxCairoBrushData ()
 656 {
 657     if (m_brushPattern)
 658         cairo_pattern_destroy(m_brushPattern);
 659 }
 660
 661 void wxCairoBrushData::Apply( wxGraphicsContext* context )
 662 {
 663     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 664     if ( m_brushPattern )
 665     {
 666         cairo_set_source(ctext,m_brushPattern);
 667     }
 668     else
 669     {
 670         cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 671     }
 672 }
 673
 674 void wxCairoBrushData::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 675         const wxColour&c1, const wxColour&c2 )
 676 {
 677     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 678     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,c1.Red()/255.0,
 679         c1.Green()/255.0, c1.Blue()/255.0,c1.Alpha()/255.0);
 680     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,c2.Red()/255.0,
 681         c2.Green()/255.0, c2.Blue()/255.0,c2.Alpha()/255.0);
 682     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 683 }
 684
 685 void wxCairoBrushData::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 686         const wxColour &oColor, const wxColour &cColor )
 687 {
 688     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 689     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,oColor.Red()/255.0,
 690         oColor.Green()/255.0, oColor.Blue()/255.0,oColor.Alpha()/255.0);
 691     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,cColor.Red()/255.0,
 692         cColor.Green()/255.0, cColor.Blue()/255.0,cColor.Alpha()/255.0);
 693     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 694 }
 695
 696 void wxCairoBrushData::Init()
 697 {
 698     m_brushPattern = NULL;
 699 }
 700
 701 //-----------------------------------------------------------------------------
 702 // wxCairoFontData implementation
 703 //-----------------------------------------------------------------------------
 704
 705 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 706                          const wxColour& col ) : wxGraphicsObjectRefData(renderer)
 707 {
 708     m_red = col.Red()/255.0;
 709     m_green = col.Green()/255.0;
 710     m_blue = col.Blue()/255.0;
 711     m_alpha = col.Alpha()/255.0;
 712     m_size = font.GetPointSize();
 713
 714 #ifdef __WXMAC__
 715     m_font = cairo_atsui_font_face_create_for_atsu_font_id( font.MacGetATSUFontID() );
 716 #elif defined(__WXGTK__)
 717     m_font = pango_font_description_copy( font.GetNativeFontInfo()->description );
 718 #else
 719     m_fontName = font.GetFaceName().mb_str(wxConvUTF8);
 720     m_slant = font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL;
 721     m_weight = font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL;
 722 #endif
 723 }
 724
 725 wxCairoFontData::~wxCairoFontData()
 726 {
 727 #ifdef __WXMAC__
 728     cairo_font_face_destroy( m_font );
 729 #elif defined(__WXGTK__)
 730     pango_font_description_free( m_font );
 731 #else
 732 #endif
 733 }
 734
 735 void wxCairoFontData::Apply( wxGraphicsContext* context )
 736 {
 737     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 738     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 739 #ifdef __WXGTK__
 740     // the rest is done using Pango layouts
 741 #elif defined(__WXMAC__)
 742     cairo_set_font_face(ctext, m_font);
 743     cairo_set_font_size(ctext, m_size );
 744 #else
 745     cairo_select_font_face(ctext, m_fontName, m_slant, m_weights );
 746     cairo_set_font_size(ctext, m_size );
 747 #endif
 748 }
 749
 750 //-----------------------------------------------------------------------------
 751 // wxCairoPathData implementation
 752 //-----------------------------------------------------------------------------
 753
 754 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
 755     : wxGraphicsPathData(renderer)
 756 {
 757     if (pathcontext)
 758     {
 759         m_pathContext = pathcontext;
 760     }
 761     else
 762     {
 763         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 764         m_pathContext = cairo_create(surface);
 765         cairo_surface_destroy (surface);
 766     }
 767 }
 768
 769 wxCairoPathData::~wxCairoPathData()
 770 {
 771     cairo_destroy(m_pathContext);
 772 }
 773
 774 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
 775 {
 776     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 777     cairo_t* pathcontext = cairo_create(surface);
 778     cairo_surface_destroy (surface);
 779
 780     cairo_path_t* path = cairo_copy_path(m_pathContext);
 781     cairo_append_path(pathcontext, path);
 782     cairo_path_destroy(path);
 783     return new wxCairoPathData( GetRenderer() ,pathcontext);
 784 }
 785
 786
 787 void* wxCairoPathData::GetNativePath() const
 788 {
 789     return cairo_copy_path(m_pathContext) ;
 790 }
 791
 792 void wxCairoPathData::UnGetNativePath(void *p) const
 793 {
 794     cairo_path_destroy((cairo_path_t*)p);
 795 }
 796
 797 //
 798 // The Primitives
 799 //
 800
 801 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
 802 {
 803     cairo_move_to(m_pathContext,x,y);
 804 }
 805
 806 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
 807 {
 808     cairo_line_to(m_pathContext,x,y);
 809 }
 810
 811 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
 812 {
 813     cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
 814     cairo_append_path(m_pathContext, p);
 815     UnGetNativePath(p);
 816 }
 817
 818 void wxCairoPathData::CloseSubpath()
 819 {
 820     cairo_close_path(m_pathContext);
 821 }
 822
 823 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 824 {
 825     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
 826 }
 827
 828 // gets the last point of the current path, (0,0) if not yet set
 829 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
 830 {
 831     double dx,dy;
 832     cairo_get_current_point(m_pathContext,&dx,&dy);
 833     if (x)
 834         *x = dx;
 835     if (y)
 836         *y = dy;
 837 }
 838
 839 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 840 {
 841     // as clockwise means positive in our system (y pointing downwards)
 842     // TODO make this interpretation dependent of the
 843     // real device trans
 844     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
 845         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
 846     else
 847         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
 848 }
 849
 850 // transforms each point of this path by the matrix
 851 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
 852 {
 853     // as we don't have a true path object, we have to apply the inverse
 854     // matrix to the context
 855     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
 856     cairo_matrix_invert( &m );
 857     cairo_transform(m_pathContext,&m);
 858 }
 859
 860 // gets the bounding box enclosing all points (possibly including control points)
 861 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
 862 {
 863     double x1,y1,x2,y2;
 864
 865     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
 866     if ( x2 < x1 )
 867     {
 868         *x = x2;
 869         *w = x1-x2;
 870     }
 871     else
 872     {
 873         *x = x1;
 874         *w = x2-x1;
 875     }
 876
 877     if( y2 < y1 )
 878     {
 879         *y = y2;
 880         *h = y1-y2;
 881     }
 882     else
 883     {
 884         *y = y1;
 885         *h = y2-y1;
 886     }
 887 }
 888
 889 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, int WXUNUSED(fillStyle) ) const
 890 {
 891     return cairo_in_stroke( m_pathContext, x, y) != 0;
 892 }
 893
 894 //-----------------------------------------------------------------------------
 895 // wxCairoMatrixData implementation
 896 //-----------------------------------------------------------------------------
 897
 898 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
 899     : wxGraphicsMatrixData(renderer)
 900 {
 901     if ( matrix )
 902         m_matrix = *matrix;
 903 }
 904
 905 wxCairoMatrixData::~wxCairoMatrixData()
 906 {
 907     // nothing to do
 908 }
 909
 910 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
 911 {
 912     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
 913 }
 914
 915 // concatenates the matrix
 916 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
 917 {
 918     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
 919 }
 920
 921 // sets the matrix to the respective values
 922 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
 923                         wxDouble tx, wxDouble ty)
 924 {
 925     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
 926 }
 927
 928 // gets the component valuess of the matrix
 929 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
 930                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
 931 {
 932     if (a)  *a = m_matrix.xx;
 933     if (b)  *b = m_matrix.yx;
 934     if (c)  *c = m_matrix.xy;
 935     if (d)  *d = m_matrix.yy;
 936     if (tx) *tx= m_matrix.x0;
 937     if (ty) *ty= m_matrix.y0;
 938 }
 939
 940 // makes this the inverse matrix
 941 void wxCairoMatrixData::Invert()
 942 {
 943     cairo_matrix_invert( &m_matrix );
 944 }
 945
 946 // returns true if the elements of the transformation matrix are equal ?
 947 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
 948 {
 949     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
 950     return (
 951         m_matrix.xx == tm->xx &&
 952         m_matrix.yx == tm->yx &&
 953         m_matrix.xy == tm->xy &&
 954         m_matrix.yy == tm->yy &&
 955         m_matrix.x0 == tm->x0 &&
 956         m_matrix.y0 == tm->y0 ) ;
 957 }
 958
 959 // return true if this is the identity matrix
 960 bool wxCairoMatrixData::IsIdentity() const
 961 {
 962     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
 963         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
 964 }
 965
 966 //
 967 // transformation
 968 //
 969
 970 // add the translation to this matrix
 971 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
 972 {
 973     cairo_matrix_translate( &m_matrix, dx, dy) ;
 974 }
 975
 976 // add the scale to this matrix
 977 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
 978 {
 979     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
 980 }
 981
 982 // add the rotation to this matrix (radians)
 983 void wxCairoMatrixData::Rotate( wxDouble angle )
 984 {
 985     cairo_matrix_rotate( &m_matrix, angle) ;
 986 }
 987
 988 //
 989 // apply the transforms
 990 //
 991
 992 // applies that matrix to the point
 993 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
 994 {
 995     double lx = *x, ly = *y ;
 996     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
 997     *x = lx;
 998     *y = ly;
 999 }
1000
1001 // applies the matrix except for translations
1002 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1003 {
1004     double lx = *dx, ly = *dy ;
1005     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1006     *dx = lx;
1007     *dy = ly;
1008 }
1009
1010 // returns the native representation
1011 void * wxCairoMatrixData::GetNativeMatrix() const
1012 {
1013     return (void*) &m_matrix;
1014 }
1015
1016 //-----------------------------------------------------------------------------
1017 // wxCairoContext implementation
1018 //-----------------------------------------------------------------------------
1019
1020 class wxCairoOffsetHelper
1021 {
1022 public :
1023     wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1024     {
1025         m_ctx = ctx;
1026         m_offset = offset;
1027         if ( m_offset )
1028              cairo_translate( m_ctx, 0.5, 0.5 );
1029     }
1030     ~wxCairoOffsetHelper( )
1031     {
1032         if ( m_offset )
1033             cairo_translate( m_ctx, -0.5, -0.5 );
1034     }
1035 public :
1036     cairo_t* m_ctx;
1037     bool m_offset;
1038 } ;
1039
1040 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1041 : wxGraphicsContext(renderer)
1042 {
1043 #ifdef __WXGTK20__
1044     const wxDCImpl *impl = dc.GetImpl();
1045     Init( (cairo_t*) impl->GetCairoContext() );
1046
1047     wxPoint org = dc.GetDeviceOrigin();
1048     cairo_translate( m_context, org.x, org.y );
1049
1050     double sx,sy;
1051     dc.GetUserScale( &sx, &sy );
1052     cairo_scale( m_context, sx, sy );
1053
1054     org = dc.GetLogicalOrigin();
1055     cairo_translate( m_context, -org.x, -org.y );
1056 #endif
1057 }
1058
1059 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1060 : wxGraphicsContext(renderer)
1061 {
1062 #ifdef __WXGTK20__
1063     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1064     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1065
1066 #if 0
1067     wxGraphicsMatrix matrix = CreateMatrix();
1068
1069     wxPoint org = dc.GetDeviceOrigin();
1070     matrix.Translate( org.x, org.y );
1071
1072     org = dc.GetLogicalOrigin();
1073     matrix.Translate( -org.x, -org.y );
1074
1075     double sx,sy;
1076     dc.GetUserScale( &sx, &sy );
1077     matrix.Scale( sx, sy );
1078
1079     ConcatTransform( matrix );
1080 #endif
1081 #endif
1082
1083 #ifdef __WXMAC__
1084     int width, height;
1085     dc.GetSize( &width, &height );
1086     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1087     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1088     Init( cairo_create( surface ) );
1089     cairo_surface_destroy( surface );
1090 #endif
1091 }
1092
1093 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1094 : wxGraphicsContext(renderer)
1095 {
1096 #ifdef __WXGTK20__
1097     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1098     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1099
1100 #if 0
1101     wxGraphicsMatrix matrix = CreateMatrix();
1102
1103     wxPoint org = dc.GetDeviceOrigin();
1104     matrix.Translate( org.x, org.y );
1105
1106     org = dc.GetLogicalOrigin();
1107     matrix.Translate( -org.x, -org.y );
1108
1109     double sx,sy;
1110     dc.GetUserScale( &sx, &sy );
1111     matrix.Scale( sx, sy );
1112
1113     ConcatTransform( matrix );
1114 #endif
1115 #endif
1116
1117 #ifdef __WXMAC__
1118     int width, height;
1119     dc.GetSize( &width, &height );
1120     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1121     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1122     Init( cairo_create( surface ) );
1123     cairo_surface_destroy( surface );
1124 #endif
1125 }
1126
1127 #ifdef __WXGTK20__
1128 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
1129 : wxGraphicsContext(renderer)
1130 {
1131     Init( gdk_cairo_create( drawable ) );
1132 }
1133 #endif
1134
1135 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1136 : wxGraphicsContext(renderer)
1137 {
1138     Init( context );
1139 }
1140
1141 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1142 : wxGraphicsContext(renderer)
1143 {
1144 #ifdef __WXGTK__
1145     // something along these lines (copied from dcclient)
1146
1147     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1148     // code should still be able to create wxClientDCs for them, so we will
1149     // use the parent window here then.
1150     if (window->m_wxwindow == NULL)
1151     {
1152         window = window->GetParent();
1153     }
1154
1155     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1156
1157     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1158 #endif
1159 }
1160
1161 wxCairoContext::~wxCairoContext()
1162 {
1163     if ( m_context )
1164     {
1165         PopState();
1166         PopState();
1167         cairo_destroy(m_context);
1168     }
1169 }
1170
1171 void wxCairoContext::Init(cairo_t *context)
1172 {
1173     m_context = context ;
1174     PushState();
1175     PushState();
1176 }
1177
1178
1179 void wxCairoContext::Clip( const wxRegion& region )
1180 {
1181     // Create a path with all the rectangles in the region
1182     wxGraphicsPath path = GetRenderer()->CreatePath();
1183     wxRegionIterator ri(region);
1184     while (ri)
1185     {
1186         path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1187         ++ri;
1188     }
1189
1190     // Put it in the context
1191     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1192     cairo_append_path(m_context, cp);
1193
1194     // clip to that path
1195     cairo_clip(m_context);
1196     path.UnGetNativePath(cp);
1197 }
1198
1199 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1200 {
1201     // Create a path with this rectangle
1202     wxGraphicsPath path = GetRenderer()->CreatePath();
1203     path.AddRectangle(x,y,w,h);
1204
1205     // Put it in the context
1206     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1207     cairo_append_path(m_context, cp);
1208
1209     // clip to that path
1210     cairo_clip(m_context);
1211     path.UnGetNativePath(cp);
1212 }
1213
1214 void wxCairoContext::ResetClip()
1215 {
1216     cairo_reset_clip(m_context);
1217 }
1218
1219
1220 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1221 {
1222     if ( !m_pen.IsNull() )
1223     {
1224         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1225         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1226         cairo_append_path(m_context,cp);
1227         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1228         cairo_stroke(m_context);
1229         path.UnGetNativePath(cp);
1230     }
1231 }
1232
1233 void wxCairoContext::FillPath( const wxGraphicsPath& path , int fillStyle )
1234 {
1235     if ( !m_brush.IsNull() )
1236     {
1237         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1238         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1239         cairo_append_path(m_context,cp);
1240         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1241         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1242         cairo_fill(m_context);
1243         path.UnGetNativePath(cp);
1244     }
1245 }
1246
1247 void wxCairoContext::Rotate( wxDouble angle )
1248 {
1249     cairo_rotate(m_context,angle);
1250 }
1251
1252 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1253 {
1254     cairo_translate(m_context,dx,dy);
1255 }
1256
1257 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1258 {
1259     cairo_scale(m_context,xScale,yScale);
1260 }
1261
1262 // concatenates this transform with the current transform of this context
1263 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1264 {
1265     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1266 }
1267
1268 // sets the transform of this context
1269 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1270 {
1271     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1272 }
1273
1274 // gets the matrix of this context
1275 wxGraphicsMatrix wxCairoContext::GetTransform() const
1276 {
1277     wxGraphicsMatrix matrix = CreateMatrix();
1278     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1279     return matrix;
1280 }
1281
1282
1283
1284 void wxCairoContext::PushState()
1285 {
1286     cairo_save(m_context);
1287 }
1288
1289 void wxCairoContext::PopState()
1290 {
1291     cairo_restore(m_context);
1292 }
1293
1294 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1295 {
1296     wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1297
1298     cairo_surface_t* surface;
1299     int bw = bmp.GetWidth();
1300     int bh = bmp.GetHeight();
1301     wxBitmap bmpSource = bmp;  // we need a non-const instance
1302     unsigned char* buffer = new unsigned char[bw*bh*4];
1303     wxUint32* data = (wxUint32*)buffer;
1304
1305     // Create a surface object and copy the bitmap pixel data to it.  if the
1306     // image has alpha (or a mask represented as alpha) then we'll use a
1307     // different format and iterator than if it doesn't...
1308     if (bmpSource.HasAlpha() || bmpSource.GetMask())
1309     {
1310         surface = cairo_image_surface_create_for_data(
1311             buffer, CAIRO_FORMAT_ARGB32, bw, bh, bw*4);
1312         wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1313         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1314
1315         wxAlphaPixelData::Iterator p(pixData);
1316         for (int y=0; y<bh; y++)
1317         {
1318             wxAlphaPixelData::Iterator rowStart = p;
1319             for (int x=0; x<bw; x++)
1320             {
1321                 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1322                 // with alpha in the upper 8 bits, then red, then green, then
1323                 // blue. The 32-bit quantities are stored native-endian.
1324                 // Pre-multiplied alpha is used.
1325                 unsigned char alpha = p.Alpha();
1326                 if (alpha == 0)
1327                     *data = 0;
1328                 else
1329                     *data = ( alpha                      << 24
1330                               | (p.Red() * alpha/255)    << 16
1331                               | (p.Green() * alpha/255)  <<  8
1332                               | (p.Blue() * alpha/255) );
1333                 ++data;
1334                 ++p;
1335             }
1336             p = rowStart;
1337             p.OffsetY(pixData, 1);
1338         }
1339     }
1340     else  // no alpha
1341     {
1342         surface = cairo_image_surface_create_for_data(
1343             buffer, CAIRO_FORMAT_RGB24, bw, bh, bw*4);
1344         wxNativePixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1345         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1346
1347         wxNativePixelData::Iterator p(pixData);
1348         for (int y=0; y<bh; y++)
1349         {
1350             wxNativePixelData::Iterator rowStart = p;
1351             for (int x=0; x<bw; x++)
1352             {
1353                 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1354                 // the upper 8 bits unused. Red, Green, and Blue are stored in
1355                 // the remaining 24 bits in that order.  The 32-bit quantities
1356                 // are stored native-endian.
1357                 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1358                 ++data;
1359                 ++p;
1360             }
1361             p = rowStart;
1362             p.OffsetY(pixData, 1);
1363         }
1364     }
1365
1366
1367     PushState();
1368
1369     // In case we're scaling the image by using a width and height different
1370     // than the bitmap's size create a pattern transformation on the surface and
1371     // draw the transformed pattern.
1372     cairo_pattern_t* pattern = cairo_pattern_create_for_surface(surface);
1373     wxDouble scaleX = w / bw;
1374     wxDouble scaleY = h / bh;
1375     cairo_scale(m_context, scaleX, scaleY);
1376
1377     // prepare to draw the image
1378     cairo_translate(m_context, x, y);
1379     cairo_set_source(m_context, pattern);
1380     // use the original size here since the context is scaled already...
1381     cairo_rectangle(m_context, 0, 0, bw, bh);
1382     // fill the rectangle using the pattern
1383     cairo_fill(m_context);
1384
1385     // clean up
1386     cairo_pattern_destroy(pattern);
1387     cairo_surface_destroy(surface);
1388     delete [] buffer;
1389     PopState();
1390 }
1391
1392 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1393 {
1394     // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
1395     // start using the Cairo backend on other platforms then we may need to
1396     // fiddle with this...
1397     DrawBitmap(icon, x, y, w, h);
1398 }
1399
1400
1401 void wxCairoContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
1402 {
1403     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::DrawText - no valid font set") );
1404
1405     if ( str.empty())
1406         return;
1407
1408 #ifdef __WXGTK__
1409     const wxCharBuffer data = str.utf8_str();
1410     if ( !data )
1411         return;
1412     size_t datalen = strlen(data);
1413     ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
1414
1415     PangoLayout *layout = pango_cairo_create_layout (m_context);
1416     pango_layout_set_font_description( layout, ((wxCairoFontData*)m_font.GetRefData())->GetFont());
1417     pango_layout_set_text(layout, data, datalen);
1418     cairo_move_to(m_context, x, y);
1419     pango_cairo_show_layout (m_context, layout);
1420
1421     g_object_unref (layout);
1422 #else
1423     ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
1424     // Cairo's x,y for drawing text is at the baseline, so we need to adjust
1425     // the position we move to by the ascent.
1426     cairo_font_extents_t fe;
1427     cairo_font_extents(m_context, &fe);
1428     cairo_move_to(m_context, x, y+fe.ascent);
1429
1430     const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
1431     cairo_show_text(m_context,buf);
1432 #endif
1433 }
1434
1435 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1436                                     wxDouble *descent, wxDouble *externalLeading ) const
1437 {
1438     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
1439
1440     if ( width )
1441         *width = 0;
1442     if ( height )
1443         *height = 0;
1444     if ( descent )
1445         *descent = 0;
1446     if ( externalLeading )
1447         *externalLeading = 0;
1448
1449     if ( str.empty())
1450         return;
1451
1452 #ifdef __WXGTK__
1453     int w, h;
1454
1455     PangoLayout *layout = pango_cairo_create_layout (m_context);
1456     pango_layout_set_font_description( layout, ((wxCairoFontData*)m_font.GetRefData())->GetFont());
1457     const wxCharBuffer data = str.utf8_str();
1458     if ( !data )
1459     {
1460         return;
1461     }
1462     pango_layout_set_text( layout, data, strlen(data) );
1463     pango_layout_get_pixel_size (layout, &w, &h);
1464     if ( width )
1465         *width = w;
1466     if ( height )
1467         *height = h;
1468     if (descent)
1469     {
1470         PangoLayoutIter *iter = pango_layout_get_iter(layout);
1471         int baseline = pango_layout_iter_get_baseline(iter);
1472         pango_layout_iter_free(iter);
1473         *descent = h - PANGO_PIXELS(baseline);
1474     }
1475     g_object_unref (layout);
1476 #else
1477     ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this);
1478
1479     if (width)
1480     {
1481         const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
1482         cairo_text_extents_t te;
1483         cairo_text_extents(m_context, buf, &te);
1484         *width = te.width;
1485     }
1486
1487     if (height || descent || externalLeading)
1488     {
1489         cairo_font_extents_t fe;
1490         cairo_font_extents(m_context, &fe);
1491
1492         // some backends have negative descents
1493
1494         if ( fe.descent < 0 )
1495             fe.descent = -fe.descent;
1496
1497         if ( fe.height < (fe.ascent + fe.descent ) )
1498         {
1499             // some backends are broken re height ... (eg currently ATSUI)
1500             fe.height = fe.ascent + fe.descent;
1501         }
1502
1503         if (height)
1504             *height = fe.height;
1505         if ( descent )
1506             *descent = fe.descent;
1507         if ( externalLeading )
1508             *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
1509     }
1510 #endif
1511 }
1512
1513 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
1514 {
1515     widths.Empty();
1516     widths.Add(0, text.length());
1517
1518     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
1519
1520     if (text.empty())
1521         return;
1522
1523     // TODO
1524 }
1525
1526 void * wxCairoContext::GetNativeContext()
1527 {
1528     return m_context;
1529 }
1530
1531 // Cairo doesn't support bitwise logical function (a.k.a. ROP, raster output
1532 // mode). Cairo supports Porter-Duff compositing operators, but they are quite
1533 // different, although in some cases have similar names.
1534 bool wxCairoContext::SetLogicalFunction( int function )
1535 {
1536     if (m_logicalFunction == function)
1537         return true;
1538
1539     cairo_operator_t op;
1540
1541     switch ( function )
1542     {
1543         case wxCOPY:       // (default) src
1544             op = CAIRO_OPERATOR_OVER; // (also default)
1545             break;
1546         case wxOR:         // src OR dst
1547             op = CAIRO_OPERATOR_ADD;
1548             break;
1549         case wxNO_OP:      // dst
1550             op = CAIRO_OPERATOR_DEST; // ignore the source
1551             break;
1552         case wxCLEAR:      // 0
1553             op = CAIRO_OPERATOR_CLEAR;// clear dst
1554             break;
1555
1556         case wxAND:        // src AND dst
1557         case wxAND_INVERT: // (NOT src) AND dst
1558         case wxAND_REVERSE:// src AND (NOT dst)
1559         case wxEQUIV:      // (NOT src) XOR dst
1560         case wxINVERT:     // NOT dst
1561         case wxNAND:       // (NOT src) OR (NOT dst)
1562         case wxNOR:        // (NOT src) AND (NOT dst)
1563         case wxOR_INVERT:  // (NOT src) OR dst
1564         case wxOR_REVERSE: // src OR (NOT dst)
1565         case wxSET:        // 1
1566         case wxSRC_INVERT: // NOT src
1567         //wxXOR does _not_ correspond to CAIRO_OPERATOR_XOR
1568         case wxXOR:        // src XOR dst
1569         default:
1570             return false;
1571     }
1572
1573     m_logicalFunction = function;
1574     cairo_set_operator(m_context, op);
1575     return true;
1576 }
1577
1578
1579 //-----------------------------------------------------------------------------
1580 // wxCairoRenderer declaration
1581 //-----------------------------------------------------------------------------
1582
1583 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
1584 {
1585 public :
1586     wxCairoRenderer() {}
1587
1588     virtual ~wxCairoRenderer() {}
1589
1590     // Context
1591
1592     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
1593     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
1594     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
1595
1596     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
1597
1598     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
1599
1600     virtual wxGraphicsContext * CreateContext( wxWindow* window );
1601
1602     virtual wxGraphicsContext * CreateMeasuringContext();
1603
1604     // Path
1605
1606     virtual wxGraphicsPath CreatePath();
1607
1608     // Matrix
1609
1610     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
1611         wxDouble tx=0.0, wxDouble ty=0.0);
1612
1613
1614     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
1615
1616     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
1617
1618     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1619     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1620         const wxColour&c1, const wxColour&c2) ;
1621
1622     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1623     // with radius r and color cColor
1624     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1625         const wxColour &oColor, const wxColour &cColor) ;
1626
1627     // sets the font
1628     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
1629
1630     // create a native bitmap representation
1631 #if 0
1632     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap )
1633     {
1634       return wxGraphicsBitmap;
1635     }
1636
1637     // create a subimage from a native image representation
1638     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  )
1639     {
1640       return wxGraphicsBitmap;
1641     }
1642 #endif
1643
1644 private :
1645     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
1646 } ;
1647
1648 //-----------------------------------------------------------------------------
1649 // wxCairoRenderer implementation
1650 //-----------------------------------------------------------------------------
1651
1652 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
1653
1654 static wxCairoRenderer gs_cairoGraphicsRenderer;
1655 // temporary hack to allow creating a cairo context on any platform
1656 extern wxGraphicsRenderer* gCairoRenderer;
1657 wxGraphicsRenderer* gCairoRenderer = &gs_cairoGraphicsRenderer;
1658
1659 #ifdef __WXGTK__
1660 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
1661 {
1662     return &gs_cairoGraphicsRenderer;
1663 }
1664 #endif
1665
1666 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
1667 {
1668     return new wxCairoContext(this,dc);
1669 }
1670
1671 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
1672 {
1673     return new wxCairoContext(this,dc);
1674 }
1675
1676 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
1677 {
1678 #ifdef __WXGTK20__
1679     const wxDCImpl *impl = dc.GetImpl();
1680     cairo_t* context = (cairo_t*) impl->GetCairoContext();
1681     if (context)
1682        return new wxCairoContext(this,dc);
1683     else
1684 #endif
1685        return NULL;
1686 }
1687
1688 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
1689 {
1690     return new wxCairoContext(this,(cairo_t*)context);
1691 }
1692
1693
1694 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
1695 {
1696 #ifdef __WXGTK__
1697     return new wxCairoContext(this,(GdkDrawable*)window);
1698 #else
1699     return NULL;
1700 #endif
1701 }
1702
1703 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
1704 {
1705     return NULL;
1706     // TODO
1707 }
1708
1709 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
1710 {
1711     return new wxCairoContext(this, window );
1712 }
1713
1714 // Path
1715
1716 wxGraphicsPath wxCairoRenderer::CreatePath()
1717 {
1718     wxGraphicsPath path;
1719     path.SetRefData( new wxCairoPathData(this) );
1720     return path;
1721 }
1722
1723
1724 // Matrix
1725
1726 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1727                                                 wxDouble tx, wxDouble ty)
1728
1729 {
1730     wxGraphicsMatrix m;
1731     wxCairoMatrixData* data = new wxCairoMatrixData( this );
1732     data->Set( a,b,c,d,tx,ty ) ;
1733     m.SetRefData(data);
1734     return m;
1735 }
1736
1737 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
1738 {
1739     if ( !pen.Ok() || pen.GetStyle() == wxTRANSPARENT )
1740         return wxNullGraphicsPen;
1741     else
1742     {
1743         wxGraphicsPen p;
1744         p.SetRefData(new wxCairoPenData( this, pen ));
1745         return p;
1746     }
1747 }
1748
1749 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
1750 {
1751     if ( !brush.Ok() || brush.GetStyle() == wxTRANSPARENT )
1752         return wxNullGraphicsBrush;
1753     else
1754     {
1755         wxGraphicsBrush p;
1756         p.SetRefData(new wxCairoBrushData( this, brush ));
1757         return p;
1758     }
1759 }
1760
1761 // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1762 wxGraphicsBrush wxCairoRenderer::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1763                                                                       const wxColour&c1, const wxColour&c2)
1764 {
1765     wxGraphicsBrush p;
1766     wxCairoBrushData* d = new wxCairoBrushData( this );
1767     d->CreateLinearGradientBrush(x1, y1, x2, y2, c1, c2);
1768     p.SetRefData(d);
1769     return p;
1770 }
1771
1772 // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1773 // with radius r and color cColor
1774 wxGraphicsBrush wxCairoRenderer::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1775                                                                       const wxColour &oColor, const wxColour &cColor)
1776 {
1777     wxGraphicsBrush p;
1778     wxCairoBrushData* d = new wxCairoBrushData( this );
1779     d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,oColor,cColor);
1780     p.SetRefData(d);
1781     return p;
1782 }
1783
1784 // sets the font
1785 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
1786 {
1787     if ( font.Ok() )
1788     {
1789         wxGraphicsFont p;
1790         p.SetRefData(new wxCairoFontData( this , font, col ));
1791         return p;
1792     }
1793     else
1794         return wxNullGraphicsFont;
1795 }
1796
1797 #endif  // wxUSE_GRAPHICS_CONTEXT