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, wxPolygonFillMode 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     bool GetUnderlined() const { return m_underlined; }
 295 #endif
 296 private :
 297     double m_size;
 298     bool m_underlined;
 299     double m_red;
 300     double m_green;
 301     double m_blue;
 302     double m_alpha;
 303 #ifdef __WXMAC__
 304     cairo_font_face_t *m_font;
 305 #elif defined(__WXGTK__)
 306     PangoFontDescription* m_font;
 307 #else
 308     wxCharBuffer m_fontName;
 309     cairo_font_slant_t m_slant;
 310     cairo_font_weight_t m_weight;
 311 #endif
 312 };
 313
 314 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
 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( wxRasterOperationMode function );
 351
 352     virtual void StrokePath( const wxGraphicsPath& p );
 353     virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode 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 GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 374                                 wxDouble *descent, wxDouble *externalLeading ) const;
 375     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 376
 377 private:
 378     void Init(cairo_t *context);
 379
 380     virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
 381
 382     cairo_t* m_context;
 383
 384     DECLARE_NO_COPY_CLASS(wxCairoContext)
 385 };
 386
 387 //-----------------------------------------------------------------------------
 388 // wxCairoPenData implementation
 389 //-----------------------------------------------------------------------------
 390
 391 wxCairoPenData::~wxCairoPenData()
 392 {
 393     delete[] m_userLengths;
 394 }
 395
 396 void wxCairoPenData::Init()
 397 {
 398     m_lengths = NULL;
 399     m_userLengths = NULL;
 400     m_width = 0;
 401     m_count = 0;
 402 }
 403
 404 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 405 : wxGraphicsObjectRefData(renderer)
 406 {
 407     Init();
 408     m_pen = pen;
 409     m_width = m_pen.GetWidth();
 410     if (m_width <= 0.0)
 411         m_width = 0.1;
 412
 413     m_red = m_pen.GetColour().Red()/255.0;
 414     m_green = m_pen.GetColour().Green()/255.0;
 415     m_blue = m_pen.GetColour().Blue()/255.0;
 416     m_alpha = m_pen.GetColour().Alpha()/255.0;
 417
 418     switch ( m_pen.GetCap() )
 419     {
 420     case wxCAP_ROUND :
 421         m_cap = CAIRO_LINE_CAP_ROUND;
 422         break;
 423
 424     case wxCAP_PROJECTING :
 425         m_cap = CAIRO_LINE_CAP_SQUARE;
 426         break;
 427
 428     case wxCAP_BUTT :
 429         m_cap = CAIRO_LINE_CAP_BUTT;
 430         break;
 431
 432     default :
 433         m_cap = CAIRO_LINE_CAP_BUTT;
 434         break;
 435     }
 436
 437     switch ( m_pen.GetJoin() )
 438     {
 439     case wxJOIN_BEVEL :
 440         m_join = CAIRO_LINE_JOIN_BEVEL;
 441         break;
 442
 443     case wxJOIN_MITER :
 444         m_join = CAIRO_LINE_JOIN_MITER;
 445         break;
 446
 447     case wxJOIN_ROUND :
 448         m_join = CAIRO_LINE_JOIN_ROUND;
 449         break;
 450
 451     default :
 452         m_join = CAIRO_LINE_JOIN_MITER;
 453         break;
 454     }
 455
 456     const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
 457     const double dotted[] =
 458     {
 459         dashUnit , dashUnit + 2.0
 460     };
 461     static const double short_dashed[] =
 462     {
 463         9.0 , 6.0
 464     };
 465     static const double dashed[] =
 466     {
 467         19.0 , 9.0
 468     };
 469     static const double dotted_dashed[] =
 470     {
 471         9.0 , 6.0 , 3.0 , 3.0
 472     };
 473
 474     switch ( m_pen.GetStyle() )
 475     {
 476     case wxPENSTYLE_SOLID :
 477         break;
 478
 479     case wxPENSTYLE_DOT :
 480         m_count = WXSIZEOF(dotted);
 481         m_userLengths = new double[ m_count ] ;
 482         memcpy( m_userLengths, dotted, sizeof(dotted) );
 483         m_lengths = m_userLengths;
 484         break;
 485
 486     case wxPENSTYLE_LONG_DASH :
 487         m_lengths = dashed ;
 488         m_count = WXSIZEOF(dashed);
 489         break;
 490
 491     case wxPENSTYLE_SHORT_DASH :
 492         m_lengths = short_dashed ;
 493         m_count = WXSIZEOF(short_dashed);
 494         break;
 495
 496     case wxPENSTYLE_DOT_DASH :
 497         m_lengths = dotted_dashed ;
 498         m_count = WXSIZEOF(dotted_dashed);
 499         break;
 500
 501     case wxPENSTYLE_USER_DASH :
 502         {
 503             wxDash *wxdashes ;
 504             m_count = m_pen.GetDashes( &wxdashes ) ;
 505             if ((wxdashes != NULL) && (m_count > 0))
 506             {
 507                 m_userLengths = new double[m_count] ;
 508                 for ( int i = 0 ; i < m_count ; ++i )
 509                 {
 510                     m_userLengths[i] = wxdashes[i] * dashUnit ;
 511
 512                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 513                         m_userLengths[i] = dashUnit + 2.0 ;
 514                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 515                         m_userLengths[i] = dashUnit ;
 516                 }
 517             }
 518             m_lengths = m_userLengths ;
 519         }
 520         break;
 521     case wxPENSTYLE_STIPPLE :
 522         {
 523             /*
 524             wxBitmap* bmp = pen.GetStipple();
 525             if ( bmp && bmp->Ok() )
 526             {
 527             wxDELETE( m_penImage );
 528             wxDELETE( m_penBrush );
 529             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 530             m_penBrush = new TextureBrush(m_penImage);
 531             m_pen->SetBrush( m_penBrush );
 532             }
 533             */
 534         }
 535         break;
 536     default :
 537         if ( m_pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH
 538             && m_pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
 539         {
 540             /*
 541             wxDELETE( m_penBrush );
 542             HatchStyle style = HatchStyleHorizontal;
 543             switch( pen.GetStyle() )
 544             {
 545             case wxPENSTYLE_BDIAGONAL_HATCH :
 546             style = HatchStyleBackwardDiagonal;
 547             break ;
 548             case wxPENSTYLE_CROSSDIAG_HATCH :
 549             style = HatchStyleDiagonalCross;
 550             break ;
 551             case wxPENSTYLE_FDIAGONAL_HATCH :
 552             style = HatchStyleForwardDiagonal;
 553             break ;
 554             case wxPENSTYLE_CROSS_HATCH :
 555             style = HatchStyleCross;
 556             break ;
 557             case wxPENSTYLE_HORIZONTAL_HATCH :
 558             style = HatchStyleHorizontal;
 559             break ;
 560             case wxPENSTYLE_VERTICAL_HATCH :
 561             style = HatchStyleVertical;
 562             break ;
 563
 564             }
 565             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 566             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 567             m_pen->SetBrush( m_penBrush )
 568             */
 569         }
 570         break;
 571     }
 572 }
 573
 574 void wxCairoPenData::Apply( wxGraphicsContext* context )
 575 {
 576     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 577     cairo_set_line_width(ctext,m_width);
 578     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 579     cairo_set_line_cap(ctext,m_cap);
 580     cairo_set_line_join(ctext,m_join);
 581     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 582 }
 583
 584 //-----------------------------------------------------------------------------
 585 // wxCairoBrushData implementation
 586 //-----------------------------------------------------------------------------
 587
 588 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 589   : wxGraphicsObjectRefData( renderer )
 590 {
 591     Init();
 592 }
 593
 594 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
 595   : wxGraphicsObjectRefData(renderer)
 596 {
 597     Init();
 598
 599     m_red = brush.GetColour().Red()/255.0;
 600     m_green = brush.GetColour().Green()/255.0;
 601     m_blue = brush.GetColour().Blue()/255.0;
 602     m_alpha = brush.GetColour().Alpha()/255.0;
 603     /*
 604     if ( brush.GetStyle() == wxBRUSHSTYLE_SOLID)
 605     {
 606     m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 607     brush.GetColour().Green() , brush.GetColour().Blue() ) );
 608     }
 609     else if ( brush.IsHatch() )
 610     {
 611     HatchStyle style = HatchStyleHorizontal;
 612     switch( brush.GetStyle() )
 613     {
 614     case wxBRUSHSTYLE_BDIAGONAL_HATCH :
 615     style = HatchStyleBackwardDiagonal;
 616     break ;
 617     case wxBRUSHSTYLE_CROSSDIAG_HATCH :
 618     style = HatchStyleDiagonalCross;
 619     break ;
 620     case wxBRUSHSTYLE_FDIAGONAL_HATCH :
 621     style = HatchStyleForwardDiagonal;
 622     break ;
 623     case wxBRUSHSTYLE_CROSS_HATCH :
 624     style = HatchStyleCross;
 625     break ;
 626     case wxBRUSHSTYLE_HORIZONTAL_HATCH :
 627     style = HatchStyleHorizontal;
 628     break ;
 629     case wxBRUSHSTYLE_VERTICAL_HATCH :
 630     style = HatchStyleVertical;
 631     break ;
 632
 633     }
 634     m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 635     brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 636     }
 637     else
 638     {
 639     wxBitmap* bmp = brush.GetStipple();
 640     if ( bmp && bmp->Ok() )
 641     {
 642     wxDELETE( m_brushImage );
 643     m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 644     m_brush = new TextureBrush(m_brushImage);
 645     }
 646     }
 647     */
 648 }
 649
 650 wxCairoBrushData::~wxCairoBrushData ()
 651 {
 652     if (m_brushPattern)
 653         cairo_pattern_destroy(m_brushPattern);
 654 }
 655
 656 void wxCairoBrushData::Apply( wxGraphicsContext* context )
 657 {
 658     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 659     if ( m_brushPattern )
 660     {
 661         cairo_set_source(ctext,m_brushPattern);
 662     }
 663     else
 664     {
 665         cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 666     }
 667 }
 668
 669 void wxCairoBrushData::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 670         const wxColour&c1, const wxColour&c2 )
 671 {
 672     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 673     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,c1.Red()/255.0,
 674         c1.Green()/255.0, c1.Blue()/255.0,c1.Alpha()/255.0);
 675     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,c2.Red()/255.0,
 676         c2.Green()/255.0, c2.Blue()/255.0,c2.Alpha()/255.0);
 677     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 678 }
 679
 680 void wxCairoBrushData::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 681         const wxColour &oColor, const wxColour &cColor )
 682 {
 683     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 684     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,oColor.Red()/255.0,
 685         oColor.Green()/255.0, oColor.Blue()/255.0,oColor.Alpha()/255.0);
 686     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,cColor.Red()/255.0,
 687         cColor.Green()/255.0, cColor.Blue()/255.0,cColor.Alpha()/255.0);
 688     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 689 }
 690
 691 void wxCairoBrushData::Init()
 692 {
 693     m_brushPattern = NULL;
 694 }
 695
 696 //-----------------------------------------------------------------------------
 697 // wxCairoFontData implementation
 698 //-----------------------------------------------------------------------------
 699
 700 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 701                          const wxColour& col ) : wxGraphicsObjectRefData(renderer)
 702 {
 703     m_red = col.Red()/255.0;
 704     m_green = col.Green()/255.0;
 705     m_blue = col.Blue()/255.0;
 706     m_alpha = col.Alpha()/255.0;
 707     m_size = font.GetPointSize();
 708     m_underlined = font.GetUnderlined();
 709
 710 #ifdef __WXMAC__
 711     m_font = cairo_atsui_font_face_create_for_atsu_font_id( font.MacGetATSUFontID() );
 712 #elif defined(__WXGTK__)
 713     m_font = pango_font_description_copy( font.GetNativeFontInfo()->description );
 714 #else
 715     m_fontName = font.GetFaceName().mb_str(wxConvUTF8);
 716     m_slant = font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL;
 717     m_weight = font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL;
 718 #endif
 719 }
 720
 721 wxCairoFontData::~wxCairoFontData()
 722 {
 723 #ifdef __WXMAC__
 724     cairo_font_face_destroy( m_font );
 725 #elif defined(__WXGTK__)
 726     pango_font_description_free( m_font );
 727 #else
 728 #endif
 729 }
 730
 731 void wxCairoFontData::Apply( wxGraphicsContext* context )
 732 {
 733     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 734     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 735 #ifdef __WXGTK__
 736     // the rest is done using Pango layouts
 737 #elif defined(__WXMAC__)
 738     cairo_set_font_face(ctext, m_font);
 739     cairo_set_font_size(ctext, m_size );
 740 #else
 741     cairo_select_font_face(ctext, m_fontName, m_slant, m_weights );
 742     cairo_set_font_size(ctext, m_size );
 743 #endif
 744 }
 745
 746 //-----------------------------------------------------------------------------
 747 // wxCairoPathData implementation
 748 //-----------------------------------------------------------------------------
 749
 750 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
 751     : wxGraphicsPathData(renderer)
 752 {
 753     if (pathcontext)
 754     {
 755         m_pathContext = pathcontext;
 756     }
 757     else
 758     {
 759         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 760         m_pathContext = cairo_create(surface);
 761         cairo_surface_destroy (surface);
 762     }
 763 }
 764
 765 wxCairoPathData::~wxCairoPathData()
 766 {
 767     cairo_destroy(m_pathContext);
 768 }
 769
 770 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
 771 {
 772     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 773     cairo_t* pathcontext = cairo_create(surface);
 774     cairo_surface_destroy (surface);
 775
 776     cairo_path_t* path = cairo_copy_path(m_pathContext);
 777     cairo_append_path(pathcontext, path);
 778     cairo_path_destroy(path);
 779     return new wxCairoPathData( GetRenderer() ,pathcontext);
 780 }
 781
 782
 783 void* wxCairoPathData::GetNativePath() const
 784 {
 785     return cairo_copy_path(m_pathContext) ;
 786 }
 787
 788 void wxCairoPathData::UnGetNativePath(void *p) const
 789 {
 790     cairo_path_destroy((cairo_path_t*)p);
 791 }
 792
 793 //
 794 // The Primitives
 795 //
 796
 797 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
 798 {
 799     cairo_move_to(m_pathContext,x,y);
 800 }
 801
 802 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
 803 {
 804     cairo_line_to(m_pathContext,x,y);
 805 }
 806
 807 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
 808 {
 809     cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
 810     cairo_append_path(m_pathContext, p);
 811     UnGetNativePath(p);
 812 }
 813
 814 void wxCairoPathData::CloseSubpath()
 815 {
 816     cairo_close_path(m_pathContext);
 817 }
 818
 819 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 820 {
 821     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
 822 }
 823
 824 // gets the last point of the current path, (0,0) if not yet set
 825 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
 826 {
 827     double dx,dy;
 828     cairo_get_current_point(m_pathContext,&dx,&dy);
 829     if (x)
 830         *x = dx;
 831     if (y)
 832         *y = dy;
 833 }
 834
 835 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 836 {
 837     // as clockwise means positive in our system (y pointing downwards)
 838     // TODO make this interpretation dependent of the
 839     // real device trans
 840     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
 841         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
 842     else
 843         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
 844 }
 845
 846 // transforms each point of this path by the matrix
 847 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
 848 {
 849     // as we don't have a true path object, we have to apply the inverse
 850     // matrix to the context
 851     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
 852     cairo_matrix_invert( &m );
 853     cairo_transform(m_pathContext,&m);
 854 }
 855
 856 // gets the bounding box enclosing all points (possibly including control points)
 857 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
 858 {
 859     double x1,y1,x2,y2;
 860
 861     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
 862     if ( x2 < x1 )
 863     {
 864         *x = x2;
 865         *w = x1-x2;
 866     }
 867     else
 868     {
 869         *x = x1;
 870         *w = x2-x1;
 871     }
 872
 873     if( y2 < y1 )
 874     {
 875         *y = y2;
 876         *h = y1-y2;
 877     }
 878     else
 879     {
 880         *y = y1;
 881         *h = y2-y1;
 882     }
 883 }
 884
 885 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode WXUNUSED(fillStyle) ) const
 886 {
 887     return cairo_in_stroke( m_pathContext, x, y) != 0;
 888 }
 889
 890 //-----------------------------------------------------------------------------
 891 // wxCairoMatrixData implementation
 892 //-----------------------------------------------------------------------------
 893
 894 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
 895     : wxGraphicsMatrixData(renderer)
 896 {
 897     if ( matrix )
 898         m_matrix = *matrix;
 899 }
 900
 901 wxCairoMatrixData::~wxCairoMatrixData()
 902 {
 903     // nothing to do
 904 }
 905
 906 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
 907 {
 908     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
 909 }
 910
 911 // concatenates the matrix
 912 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
 913 {
 914     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
 915 }
 916
 917 // sets the matrix to the respective values
 918 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
 919                         wxDouble tx, wxDouble ty)
 920 {
 921     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
 922 }
 923
 924 // gets the component valuess of the matrix
 925 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
 926                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
 927 {
 928     if (a)  *a = m_matrix.xx;
 929     if (b)  *b = m_matrix.yx;
 930     if (c)  *c = m_matrix.xy;
 931     if (d)  *d = m_matrix.yy;
 932     if (tx) *tx= m_matrix.x0;
 933     if (ty) *ty= m_matrix.y0;
 934 }
 935
 936 // makes this the inverse matrix
 937 void wxCairoMatrixData::Invert()
 938 {
 939     cairo_matrix_invert( &m_matrix );
 940 }
 941
 942 // returns true if the elements of the transformation matrix are equal ?
 943 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
 944 {
 945     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
 946     return (
 947         m_matrix.xx == tm->xx &&
 948         m_matrix.yx == tm->yx &&
 949         m_matrix.xy == tm->xy &&
 950         m_matrix.yy == tm->yy &&
 951         m_matrix.x0 == tm->x0 &&
 952         m_matrix.y0 == tm->y0 ) ;
 953 }
 954
 955 // return true if this is the identity matrix
 956 bool wxCairoMatrixData::IsIdentity() const
 957 {
 958     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
 959         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
 960 }
 961
 962 //
 963 // transformation
 964 //
 965
 966 // add the translation to this matrix
 967 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
 968 {
 969     cairo_matrix_translate( &m_matrix, dx, dy) ;
 970 }
 971
 972 // add the scale to this matrix
 973 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
 974 {
 975     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
 976 }
 977
 978 // add the rotation to this matrix (radians)
 979 void wxCairoMatrixData::Rotate( wxDouble angle )
 980 {
 981     cairo_matrix_rotate( &m_matrix, angle) ;
 982 }
 983
 984 //
 985 // apply the transforms
 986 //
 987
 988 // applies that matrix to the point
 989 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
 990 {
 991     double lx = *x, ly = *y ;
 992     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
 993     *x = lx;
 994     *y = ly;
 995 }
 996
 997 // applies the matrix except for translations
 998 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
 999 {
1000     double lx = *dx, ly = *dy ;
1001     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1002     *dx = lx;
1003     *dy = ly;
1004 }
1005
1006 // returns the native representation
1007 void * wxCairoMatrixData::GetNativeMatrix() const
1008 {
1009     return (void*) &m_matrix;
1010 }
1011
1012 //-----------------------------------------------------------------------------
1013 // wxCairoContext implementation
1014 //-----------------------------------------------------------------------------
1015
1016 class wxCairoOffsetHelper
1017 {
1018 public :
1019     wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1020     {
1021         m_ctx = ctx;
1022         m_offset = offset;
1023         if ( m_offset )
1024              cairo_translate( m_ctx, 0.5, 0.5 );
1025     }
1026     ~wxCairoOffsetHelper( )
1027     {
1028         if ( m_offset )
1029             cairo_translate( m_ctx, -0.5, -0.5 );
1030     }
1031 public :
1032     cairo_t* m_ctx;
1033     bool m_offset;
1034 } ;
1035
1036 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1037 : wxGraphicsContext(renderer)
1038 {
1039 #ifdef __WXGTK20__
1040     const wxDCImpl *impl = dc.GetImpl();
1041     Init( (cairo_t*) impl->GetCairoContext() );
1042
1043     wxPoint org = dc.GetDeviceOrigin();
1044     cairo_translate( m_context, org.x, org.y );
1045
1046     double sx,sy;
1047     dc.GetUserScale( &sx, &sy );
1048     cairo_scale( m_context, sx, sy );
1049
1050     org = dc.GetLogicalOrigin();
1051     cairo_translate( m_context, -org.x, -org.y );
1052 #endif
1053 }
1054
1055 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1056 : wxGraphicsContext(renderer)
1057 {
1058 #ifdef __WXGTK20__
1059     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1060     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1061
1062 #if 0
1063     wxGraphicsMatrix matrix = CreateMatrix();
1064
1065     wxPoint org = dc.GetDeviceOrigin();
1066     matrix.Translate( org.x, org.y );
1067
1068     org = dc.GetLogicalOrigin();
1069     matrix.Translate( -org.x, -org.y );
1070
1071     double sx,sy;
1072     dc.GetUserScale( &sx, &sy );
1073     matrix.Scale( sx, sy );
1074
1075     ConcatTransform( matrix );
1076 #endif
1077 #endif
1078
1079 #ifdef __WXMAC__
1080     int width, height;
1081     dc.GetSize( &width, &height );
1082     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1083     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1084     Init( cairo_create( surface ) );
1085     cairo_surface_destroy( surface );
1086 #endif
1087 }
1088
1089 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1090 : wxGraphicsContext(renderer)
1091 {
1092 #ifdef __WXGTK20__
1093     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1094     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1095
1096 #if 0
1097     wxGraphicsMatrix matrix = CreateMatrix();
1098
1099     wxPoint org = dc.GetDeviceOrigin();
1100     matrix.Translate( org.x, org.y );
1101
1102     org = dc.GetLogicalOrigin();
1103     matrix.Translate( -org.x, -org.y );
1104
1105     double sx,sy;
1106     dc.GetUserScale( &sx, &sy );
1107     matrix.Scale( sx, sy );
1108
1109     ConcatTransform( matrix );
1110 #endif
1111 #endif
1112
1113 #ifdef __WXMAC__
1114     int width, height;
1115     dc.GetSize( &width, &height );
1116     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1117     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1118     Init( cairo_create( surface ) );
1119     cairo_surface_destroy( surface );
1120 #endif
1121 }
1122
1123 #ifdef __WXGTK20__
1124 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
1125 : wxGraphicsContext(renderer)
1126 {
1127     Init( gdk_cairo_create( drawable ) );
1128 }
1129 #endif
1130
1131 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1132 : wxGraphicsContext(renderer)
1133 {
1134     Init( context );
1135 }
1136
1137 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1138 : wxGraphicsContext(renderer)
1139 {
1140 #ifdef __WXGTK__
1141     // something along these lines (copied from dcclient)
1142
1143     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1144     // code should still be able to create wxClientDCs for them, so we will
1145     // use the parent window here then.
1146     if (window->m_wxwindow == NULL)
1147     {
1148         window = window->GetParent();
1149     }
1150
1151     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1152
1153     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1154 #endif
1155 }
1156
1157 wxCairoContext::~wxCairoContext()
1158 {
1159     if ( m_context )
1160     {
1161         PopState();
1162         PopState();
1163         cairo_destroy(m_context);
1164     }
1165 }
1166
1167 void wxCairoContext::Init(cairo_t *context)
1168 {
1169     m_context = context ;
1170     PushState();
1171     PushState();
1172 }
1173
1174
1175 void wxCairoContext::Clip( const wxRegion& region )
1176 {
1177     // Create a path with all the rectangles in the region
1178     wxGraphicsPath path = GetRenderer()->CreatePath();
1179     wxRegionIterator ri(region);
1180     while (ri)
1181     {
1182         path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1183         ++ri;
1184     }
1185
1186     // Put it in the context
1187     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1188     cairo_append_path(m_context, cp);
1189
1190     // clip to that path
1191     cairo_clip(m_context);
1192     path.UnGetNativePath(cp);
1193 }
1194
1195 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1196 {
1197     // Create a path with this rectangle
1198     wxGraphicsPath path = GetRenderer()->CreatePath();
1199     path.AddRectangle(x,y,w,h);
1200
1201     // Put it in the context
1202     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1203     cairo_append_path(m_context, cp);
1204
1205     // clip to that path
1206     cairo_clip(m_context);
1207     path.UnGetNativePath(cp);
1208 }
1209
1210 void wxCairoContext::ResetClip()
1211 {
1212     cairo_reset_clip(m_context);
1213 }
1214
1215
1216 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1217 {
1218     if ( !m_pen.IsNull() )
1219     {
1220         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1221         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1222         cairo_append_path(m_context,cp);
1223         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1224         cairo_stroke(m_context);
1225         path.UnGetNativePath(cp);
1226     }
1227 }
1228
1229 void wxCairoContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1230 {
1231     if ( !m_brush.IsNull() )
1232     {
1233         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1234         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1235         cairo_append_path(m_context,cp);
1236         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1237         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1238         cairo_fill(m_context);
1239         path.UnGetNativePath(cp);
1240     }
1241 }
1242
1243 void wxCairoContext::Rotate( wxDouble angle )
1244 {
1245     cairo_rotate(m_context,angle);
1246 }
1247
1248 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1249 {
1250     cairo_translate(m_context,dx,dy);
1251 }
1252
1253 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1254 {
1255     cairo_scale(m_context,xScale,yScale);
1256 }
1257
1258 // concatenates this transform with the current transform of this context
1259 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1260 {
1261     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1262 }
1263
1264 // sets the transform of this context
1265 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1266 {
1267     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1268 }
1269
1270 // gets the matrix of this context
1271 wxGraphicsMatrix wxCairoContext::GetTransform() const
1272 {
1273     wxGraphicsMatrix matrix = CreateMatrix();
1274     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1275     return matrix;
1276 }
1277
1278
1279
1280 void wxCairoContext::PushState()
1281 {
1282     cairo_save(m_context);
1283 }
1284
1285 void wxCairoContext::PopState()
1286 {
1287     cairo_restore(m_context);
1288 }
1289
1290 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1291 {
1292     wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1293
1294     cairo_surface_t* surface;
1295     int bw = bmp.GetWidth();
1296     int bh = bmp.GetHeight();
1297     wxBitmap bmpSource = bmp;  // we need a non-const instance
1298     unsigned char* buffer = new unsigned char[bw*bh*4];
1299     wxUint32* data = (wxUint32*)buffer;
1300
1301     // Create a surface object and copy the bitmap pixel data to it.  if the
1302     // image has alpha (or a mask represented as alpha) then we'll use a
1303     // different format and iterator than if it doesn't...
1304     if (bmpSource.HasAlpha() || bmpSource.GetMask())
1305     {
1306         surface = cairo_image_surface_create_for_data(
1307             buffer, CAIRO_FORMAT_ARGB32, bw, bh, bw*4);
1308         wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1309         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1310
1311         wxAlphaPixelData::Iterator p(pixData);
1312         for (int y=0; y<bh; y++)
1313         {
1314             wxAlphaPixelData::Iterator rowStart = p;
1315             for (int x=0; x<bw; x++)
1316             {
1317                 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1318                 // with alpha in the upper 8 bits, then red, then green, then
1319                 // blue. The 32-bit quantities are stored native-endian.
1320                 // Pre-multiplied alpha is used.
1321                 unsigned char alpha = p.Alpha();
1322                 if (alpha == 0)
1323                     *data = 0;
1324                 else
1325                     *data = ( alpha                      << 24
1326                               | (p.Red() * alpha/255)    << 16
1327                               | (p.Green() * alpha/255)  <<  8
1328                               | (p.Blue() * alpha/255) );
1329                 ++data;
1330                 ++p;
1331             }
1332             p = rowStart;
1333             p.OffsetY(pixData, 1);
1334         }
1335     }
1336     else  // no alpha
1337     {
1338         surface = cairo_image_surface_create_for_data(
1339             buffer, CAIRO_FORMAT_RGB24, bw, bh, bw*4);
1340         wxNativePixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1341         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1342
1343         wxNativePixelData::Iterator p(pixData);
1344         for (int y=0; y<bh; y++)
1345         {
1346             wxNativePixelData::Iterator rowStart = p;
1347             for (int x=0; x<bw; x++)
1348             {
1349                 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1350                 // the upper 8 bits unused. Red, Green, and Blue are stored in
1351                 // the remaining 24 bits in that order.  The 32-bit quantities
1352                 // are stored native-endian.
1353                 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1354                 ++data;
1355                 ++p;
1356             }
1357             p = rowStart;
1358             p.OffsetY(pixData, 1);
1359         }
1360     }
1361
1362
1363     PushState();
1364
1365     // In case we're scaling the image by using a width and height different
1366     // than the bitmap's size create a pattern transformation on the surface and
1367     // draw the transformed pattern.
1368     cairo_pattern_t* pattern = cairo_pattern_create_for_surface(surface);
1369     wxDouble scaleX = w / bw;
1370     wxDouble scaleY = h / bh;
1371     cairo_scale(m_context, scaleX, scaleY);
1372
1373     // prepare to draw the image
1374     cairo_translate(m_context, x, y);
1375     cairo_set_source(m_context, pattern);
1376     // use the original size here since the context is scaled already...
1377     cairo_rectangle(m_context, 0, 0, bw, bh);
1378     // fill the rectangle using the pattern
1379     cairo_fill(m_context);
1380
1381     // clean up
1382     cairo_pattern_destroy(pattern);
1383     cairo_surface_destroy(surface);
1384     delete [] buffer;
1385     PopState();
1386 }
1387
1388 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1389 {
1390     // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
1391     // start using the Cairo backend on other platforms then we may need to
1392     // fiddle with this...
1393     DrawBitmap(icon, x, y, w, h);
1394 }
1395
1396
1397 void wxCairoContext::DoDrawText(const wxString& str, wxDouble x, wxDouble y)
1398 {
1399     wxCHECK_RET( !m_font.IsNull(),
1400                  wxT("wxCairoContext::DrawText - no valid font set") );
1401
1402     if ( str.empty())
1403         return;
1404
1405     const wxCharBuffer data = str.utf8_str();
1406     if ( !data )
1407         return;
1408
1409     ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
1410
1411 #ifdef __WXGTK__
1412     size_t datalen = strlen(data);
1413
1414     PangoLayout *layout = pango_cairo_create_layout (m_context);
1415     wxCairoFontData* font_data = (wxCairoFontData*) m_font.GetRefData();
1416     pango_layout_set_font_description( layout, font_data->GetFont());
1417     pango_layout_set_text(layout, data, datalen);
1418
1419     if (font_data->GetUnderlined())
1420     {
1421         PangoAttrList *attrs = pango_attr_list_new();
1422         PangoAttribute *attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
1423         pango_attr_list_insert(attrs, attr);
1424         pango_layout_set_attributes(layout, attrs);
1425         pango_attr_list_unref(attrs);
1426     }
1427
1428     cairo_move_to(m_context, x, y);
1429     pango_cairo_show_layout (m_context, layout);
1430
1431     g_object_unref (layout);
1432 #else
1433     // Cairo's x,y for drawing text is at the baseline, so we need to adjust
1434     // the position we move to by the ascent.
1435     cairo_font_extents_t fe;
1436     cairo_font_extents(m_context, &fe);
1437     cairo_move_to(m_context, x, y+fe.ascent);
1438
1439     cairo_show_text(m_context, data);
1440 #endif
1441 }
1442
1443 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1444                                     wxDouble *descent, wxDouble *externalLeading ) const
1445 {
1446     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
1447
1448     if ( width )
1449         *width = 0;
1450     if ( height )
1451         *height = 0;
1452     if ( descent )
1453         *descent = 0;
1454     if ( externalLeading )
1455         *externalLeading = 0;
1456
1457     if ( str.empty())
1458         return;
1459
1460 #ifdef __WXGTK__
1461     int w, h;
1462
1463     PangoLayout *layout = pango_cairo_create_layout (m_context);
1464     pango_layout_set_font_description( layout, ((wxCairoFontData*)m_font.GetRefData())->GetFont());
1465     const wxCharBuffer data = str.utf8_str();
1466     if ( !data )
1467     {
1468         return;
1469     }
1470     pango_layout_set_text( layout, data, strlen(data) );
1471     pango_layout_get_pixel_size (layout, &w, &h);
1472     if ( width )
1473         *width = w;
1474     if ( height )
1475         *height = h;
1476     if (descent)
1477     {
1478         PangoLayoutIter *iter = pango_layout_get_iter(layout);
1479         int baseline = pango_layout_iter_get_baseline(iter);
1480         pango_layout_iter_free(iter);
1481         *descent = h - PANGO_PIXELS(baseline);
1482     }
1483     g_object_unref (layout);
1484 #else
1485     ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this);
1486
1487     if (width)
1488     {
1489         const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
1490         cairo_text_extents_t te;
1491         cairo_text_extents(m_context, buf, &te);
1492         *width = te.width;
1493     }
1494
1495     if (height || descent || externalLeading)
1496     {
1497         cairo_font_extents_t fe;
1498         cairo_font_extents(m_context, &fe);
1499
1500         // some backends have negative descents
1501
1502         if ( fe.descent < 0 )
1503             fe.descent = -fe.descent;
1504
1505         if ( fe.height < (fe.ascent + fe.descent ) )
1506         {
1507             // some backends are broken re height ... (eg currently ATSUI)
1508             fe.height = fe.ascent + fe.descent;
1509         }
1510
1511         if (height)
1512             *height = fe.height;
1513         if ( descent )
1514             *descent = fe.descent;
1515         if ( externalLeading )
1516             *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
1517     }
1518 #endif
1519 }
1520
1521 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
1522 {
1523     widths.Empty();
1524     widths.Add(0, text.length());
1525
1526     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
1527
1528     if (text.empty())
1529         return;
1530
1531     // TODO
1532 }
1533
1534 void * wxCairoContext::GetNativeContext()
1535 {
1536     return m_context;
1537 }
1538
1539 // Cairo doesn't support bitwise logical function (a.k.a. ROP, raster output
1540 // mode). Cairo supports Porter-Duff compositing operators, but they are quite
1541 // different, although in some cases have similar names.
1542 bool wxCairoContext::SetLogicalFunction( wxRasterOperationMode function )
1543 {
1544     if (m_logicalFunction == function)
1545         return true;
1546
1547     cairo_operator_t op;
1548
1549     switch ( function )
1550     {
1551         case wxCOPY:       // (default) src
1552             op = CAIRO_OPERATOR_OVER; // (also default)
1553             break;
1554         case wxOR:         // src OR dst
1555             op = CAIRO_OPERATOR_ADD;
1556             break;
1557         case wxNO_OP:      // dst
1558             op = CAIRO_OPERATOR_DEST; // ignore the source
1559             break;
1560         case wxCLEAR:      // 0
1561             op = CAIRO_OPERATOR_CLEAR;// clear dst
1562             break;
1563
1564         case wxAND:        // src AND dst
1565         case wxAND_INVERT: // (NOT src) AND dst
1566         case wxAND_REVERSE:// src AND (NOT dst)
1567         case wxEQUIV:      // (NOT src) XOR dst
1568         case wxINVERT:     // NOT dst
1569         case wxNAND:       // (NOT src) OR (NOT dst)
1570         case wxNOR:        // (NOT src) AND (NOT dst)
1571         case wxOR_INVERT:  // (NOT src) OR dst
1572         case wxOR_REVERSE: // src OR (NOT dst)
1573         case wxSET:        // 1
1574         case wxSRC_INVERT: // NOT src
1575         //wxXOR does _not_ correspond to CAIRO_OPERATOR_XOR
1576         case wxXOR:        // src XOR dst
1577         default:
1578             return false;
1579     }
1580
1581     m_logicalFunction = function;
1582     cairo_set_operator(m_context, op);
1583     return true;
1584 }
1585
1586
1587 //-----------------------------------------------------------------------------
1588 // wxCairoRenderer declaration
1589 //-----------------------------------------------------------------------------
1590
1591 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
1592 {
1593 public :
1594     wxCairoRenderer() {}
1595
1596     virtual ~wxCairoRenderer() {}
1597
1598     // Context
1599
1600     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
1601     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
1602     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
1603
1604     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
1605
1606     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
1607
1608     virtual wxGraphicsContext * CreateContext( wxWindow* window );
1609
1610     virtual wxGraphicsContext * CreateMeasuringContext();
1611
1612     // Path
1613
1614     virtual wxGraphicsPath CreatePath();
1615
1616     // Matrix
1617
1618     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
1619         wxDouble tx=0.0, wxDouble ty=0.0);
1620
1621
1622     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
1623
1624     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
1625
1626     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1627     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1628         const wxColour&c1, const wxColour&c2) ;
1629
1630     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1631     // with radius r and color cColor
1632     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1633         const wxColour &oColor, const wxColour &cColor) ;
1634
1635     // sets the font
1636     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
1637
1638     // create a native bitmap representation
1639 #if 0
1640     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap )
1641     {
1642       return wxGraphicsBitmap;
1643     }
1644
1645     // create a subimage from a native image representation
1646     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  )
1647     {
1648       return wxGraphicsBitmap;
1649     }
1650 #endif
1651
1652 private :
1653     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
1654 } ;
1655
1656 //-----------------------------------------------------------------------------
1657 // wxCairoRenderer implementation
1658 //-----------------------------------------------------------------------------
1659
1660 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
1661
1662 static wxCairoRenderer gs_cairoGraphicsRenderer;
1663 // temporary hack to allow creating a cairo context on any platform
1664 extern wxGraphicsRenderer* gCairoRenderer;
1665 wxGraphicsRenderer* gCairoRenderer = &gs_cairoGraphicsRenderer;
1666
1667 #ifdef __WXGTK__
1668 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
1669 {
1670     return &gs_cairoGraphicsRenderer;
1671 }
1672 #endif
1673
1674 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
1675 {
1676     return new wxCairoContext(this,dc);
1677 }
1678
1679 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
1680 {
1681     return new wxCairoContext(this,dc);
1682 }
1683
1684 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
1685 {
1686 #ifdef __WXGTK20__
1687     const wxDCImpl *impl = dc.GetImpl();
1688     cairo_t* context = (cairo_t*) impl->GetCairoContext();
1689     if (context)
1690        return new wxCairoContext(this,dc);
1691     else
1692 #endif
1693        return NULL;
1694 }
1695
1696 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
1697 {
1698     return new wxCairoContext(this,(cairo_t*)context);
1699 }
1700
1701
1702 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
1703 {
1704 #ifdef __WXGTK__
1705     return new wxCairoContext(this,(GdkDrawable*)window);
1706 #else
1707     return NULL;
1708 #endif
1709 }
1710
1711 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
1712 {
1713     return NULL;
1714     // TODO
1715 }
1716
1717 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
1718 {
1719     return new wxCairoContext(this, window );
1720 }
1721
1722 // Path
1723
1724 wxGraphicsPath wxCairoRenderer::CreatePath()
1725 {
1726     wxGraphicsPath path;
1727     path.SetRefData( new wxCairoPathData(this) );
1728     return path;
1729 }
1730
1731
1732 // Matrix
1733
1734 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1735                                                 wxDouble tx, wxDouble ty)
1736
1737 {
1738     wxGraphicsMatrix m;
1739     wxCairoMatrixData* data = new wxCairoMatrixData( this );
1740     data->Set( a,b,c,d,tx,ty ) ;
1741     m.SetRefData(data);
1742     return m;
1743 }
1744
1745 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
1746 {
1747     if ( !pen.Ok() || pen.GetStyle() == wxTRANSPARENT )
1748         return wxNullGraphicsPen;
1749     else
1750     {
1751         wxGraphicsPen p;
1752         p.SetRefData(new wxCairoPenData( this, pen ));
1753         return p;
1754     }
1755 }
1756
1757 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
1758 {
1759     if ( !brush.Ok() || brush.GetStyle() == wxTRANSPARENT )
1760         return wxNullGraphicsBrush;
1761     else
1762     {
1763         wxGraphicsBrush p;
1764         p.SetRefData(new wxCairoBrushData( this, brush ));
1765         return p;
1766     }
1767 }
1768
1769 // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1770 wxGraphicsBrush wxCairoRenderer::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1771                                                                       const wxColour&c1, const wxColour&c2)
1772 {
1773     wxGraphicsBrush p;
1774     wxCairoBrushData* d = new wxCairoBrushData( this );
1775     d->CreateLinearGradientBrush(x1, y1, x2, y2, c1, c2);
1776     p.SetRefData(d);
1777     return p;
1778 }
1779
1780 // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1781 // with radius r and color cColor
1782 wxGraphicsBrush wxCairoRenderer::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1783                                                                       const wxColour &oColor, const wxColour &cColor)
1784 {
1785     wxGraphicsBrush p;
1786     wxCairoBrushData* d = new wxCairoBrushData( this );
1787     d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,oColor,cColor);
1788     p.SetRefData(d);
1789     return p;
1790 }
1791
1792 // sets the font
1793 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
1794 {
1795     if ( font.Ok() )
1796     {
1797         wxGraphicsFont p;
1798         p.SetRefData(new wxCairoFontData( this , font, col ));
1799         return p;
1800     }
1801     else
1802         return wxNullGraphicsFont;
1803 }
1804
1805 #endif  // wxUSE_GRAPHICS_CONTEXT