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