src/generic/graphicc.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/graphicc.cpp
   3 // Purpose:     cairo device context class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     2006-10-03
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2006 Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #if wxUSE_GRAPHICS_CONTEXT
  19
  20 #include "wx/graphics.h"
  21
  22 #ifndef WX_PRECOMP
  23     #include "wx/bitmap.h"
  24     #include "wx/icon.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 #include "wx/vector.h"
  33
  34 using namespace std;
  35
  36 //-----------------------------------------------------------------------------
  37 // device context implementation
  38 //
  39 // more and more of the dc functionality should be implemented by calling
  40 // the appropricate wxCairoContext, but we will have to do that step by step
  41 // also coordinate conversions should be moved to native matrix ops
  42 //-----------------------------------------------------------------------------
  43
  44 // we always stock two context states, one at entry, to be able to preserve the
  45 // state we were called with, the other one after changing to HI Graphics orientation
  46 // (this one is used for getting back clippings etc)
  47
  48 //-----------------------------------------------------------------------------
  49 // wxGraphicsPath implementation
  50 //-----------------------------------------------------------------------------
  51
  52 // TODO remove this dependency (gdiplus needs the macros)
  53
  54 #ifndef max
  55 #define max(a,b)            (((a) > (b)) ? (a) : (b))
  56 #endif
  57
  58 #ifndef min
  59 #define min(a,b)            (((a) < (b)) ? (a) : (b))
  60 #endif
  61
  62 #include <cairo.h>
  63 #ifdef __WXGTK__
  64 #include <gtk/gtk.h>
  65 #include "wx/fontutil.h"
  66 #include "wx/gtk/dc.h"
  67 #endif
  68
  69 #ifdef __WXMSW__
  70 #include <cairo-win32.h>
  71 #endif
  72
  73 #ifdef __WXMAC__
  74 #include "wx/osx/private.h"
  75 #include <cairo-quartz.h>
  76 #include <cairo-atsui.h>
  77 #endif
  78
  79 class WXDLLIMPEXP_CORE wxCairoPathData : public wxGraphicsPathData
  80 {
  81 public :
  82     wxCairoPathData(wxGraphicsRenderer* renderer, cairo_t* path = NULL);
  83     ~wxCairoPathData();
  84
  85     virtual wxGraphicsObjectRefData *Clone() const;
  86
  87     //
  88     // These are the path primitives from which everything else can be constructed
  89     //
  90
  91     // begins a new subpath at (x,y)
  92     virtual void MoveToPoint( wxDouble x, wxDouble y );
  93
  94     // adds a straight line from the current point to (x,y)
  95     virtual void AddLineToPoint( wxDouble x, wxDouble y );
  96
  97     // adds a cubic Bezier curve from the current point, using two control points and an end point
  98     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
  99
 100
 101     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 102     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 103
 104     // gets the last point of the current path, (0,0) if not yet set
 105     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 106
 107     // adds another path
 108     virtual void AddPath( const wxGraphicsPathData* path );
 109
 110     // closes the current sub-path
 111     virtual void CloseSubpath();
 112
 113     //
 114     // These are convenience functions which - if not available natively will be assembled
 115     // using the primitives from above
 116     //
 117
 118     /*
 119
 120     // appends a rectangle as a new closed subpath
 121     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 122     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 123     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 124
 125     // 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)
 126     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 127     */
 128
 129     // returns the native path
 130     virtual void * GetNativePath() const ;
 131
 132     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 133     virtual void UnGetNativePath(void *p) const;
 134
 135     // transforms each point of this path by the matrix
 136     virtual void Transform( const wxGraphicsMatrixData* matrix ) ;
 137
 138     // gets the bounding box enclosing all points (possibly including control points)
 139     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
 140
 141     virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxWINDING_RULE) const;
 142
 143 private :
 144     cairo_t* m_pathContext;
 145 };
 146
 147 class WXDLLIMPEXP_CORE wxCairoMatrixData : public wxGraphicsMatrixData
 148 {
 149 public :
 150     wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix = NULL ) ;
 151     virtual ~wxCairoMatrixData() ;
 152
 153     virtual wxGraphicsObjectRefData *Clone() const ;
 154
 155     // concatenates the matrix
 156     virtual void Concat( const wxGraphicsMatrixData *t );
 157
 158     // sets the matrix to the respective values
 159     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 160         wxDouble tx=0.0, wxDouble ty=0.0);
 161
 162     // gets the component valuess of the matrix
 163     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
 164                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
 165
 166     // makes this the inverse matrix
 167     virtual void Invert();
 168
 169     // returns true if the elements of the transformation matrix are equal ?
 170     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
 171
 172     // return true if this is the identity matrix
 173     virtual bool IsIdentity() const;
 174
 175     //
 176     // transformation
 177     //
 178
 179     // add the translation to this matrix
 180     virtual void Translate( wxDouble dx , wxDouble dy );
 181
 182     // add the scale to this matrix
 183     virtual void Scale( wxDouble xScale , wxDouble yScale );
 184
 185     // add the rotation to this matrix (radians)
 186     virtual void Rotate( wxDouble angle );
 187
 188     //
 189     // apply the transforms
 190     //
 191
 192     // applies that matrix to the point
 193     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 194
 195     // applies the matrix except for translations
 196     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 197
 198     // returns the native representation
 199     virtual void * GetNativeMatrix() const;
 200 private:
 201     cairo_matrix_t m_matrix ;
 202 } ;
 203
 204 class WXDLLIMPEXP_CORE wxCairoPenData : public wxGraphicsObjectRefData
 205 {
 206 public:
 207     wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 208     ~wxCairoPenData();
 209
 210     void Init();
 211
 212     virtual void Apply( wxGraphicsContext* context );
 213     virtual wxDouble GetWidth() { return m_width; }
 214
 215 private :
 216     double m_width;
 217
 218     double m_red;
 219     double m_green;
 220     double m_blue;
 221     double m_alpha;
 222
 223     cairo_line_cap_t m_cap;
 224     cairo_line_join_t m_join;
 225
 226     int m_count;
 227     const double *m_lengths;
 228     double *m_userLengths;
 229
 230     wxPen m_pen;
 231
 232     wxDECLARE_NO_COPY_CLASS(wxCairoPenData);
 233 };
 234
 235 class WXDLLIMPEXP_CORE wxCairoBrushData : public wxGraphicsObjectRefData
 236 {
 237 public:
 238     wxCairoBrushData( wxGraphicsRenderer* renderer );
 239     wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 240     ~wxCairoBrushData ();
 241
 242     virtual void Apply( wxGraphicsContext* context );
 243     void CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 244         const wxColour&c1, const wxColour&c2 );
 245     void CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 246         const wxColour &oColor, const wxColour &cColor );
 247
 248 protected:
 249     virtual void Init();
 250
 251 private :
 252     double m_red;
 253     double m_green;
 254     double m_blue;
 255     double m_alpha;
 256
 257     cairo_pattern_t* m_brushPattern;
 258 };
 259
 260 class wxCairoFontData : public wxGraphicsObjectRefData
 261 {
 262 public:
 263     wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col );
 264     ~wxCairoFontData();
 265
 266     virtual void Apply( wxGraphicsContext* context );
 267 #ifdef __WXGTK__
 268     const PangoFontDescription* GetFont() const { return m_font; }
 269     bool GetUnderlined() const { return m_underlined; }
 270 #endif
 271 private :
 272     double m_size;
 273     bool m_underlined;
 274     double m_red;
 275     double m_green;
 276     double m_blue;
 277     double m_alpha;
 278 #ifdef __WXMAC__
 279     cairo_font_face_t *m_font;
 280 #elif defined(__WXGTK__)
 281     PangoFontDescription* m_font;
 282 #else
 283     wxCharBuffer m_fontName;
 284     cairo_font_slant_t m_slant;
 285     cairo_font_weight_t m_weight;
 286 #endif
 287 };
 288
 289 class wxCairoBitmapData : public wxGraphicsObjectRefData
 290 {
 291 public:
 292     wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp );
 293     ~wxCairoBitmapData();
 294
 295     virtual cairo_surface_t* GetCairoSurface() { return m_surface; }
 296     virtual cairo_pattern_t* GetCairoPattern() { return m_pattern; }
 297     virtual wxSize GetSize() { return wxSize(m_width, m_height); }
 298 private :
 299     cairo_surface_t* m_surface;
 300     cairo_pattern_t* m_pattern;
 301     int m_width;
 302     int m_height;
 303     unsigned char* m_buffer;
 304 };
 305
 306 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
 307 {
 308 public:
 309     wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc );
 310     wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc );
 311     wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc );
 312 #ifdef __WXGTK__
 313     wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable );
 314 #endif
 315     wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context );
 316     wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window);
 317     wxCairoContext();
 318     virtual ~wxCairoContext();
 319
 320     virtual bool ShouldOffset() const
 321     {
 322         int penwidth = 0 ;
 323         if ( !m_pen.IsNull() )
 324         {
 325             penwidth = (int)((wxCairoPenData*)m_pen.GetRefData())->GetWidth();
 326             if ( penwidth == 0 )
 327                 penwidth = 1;
 328         }
 329         return ( penwidth % 2 ) == 1;
 330     }
 331
 332     virtual void Clip( const wxRegion &region );
 333
 334     // clips drawings to the rect
 335     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 336
 337     // resets the clipping to original extent
 338     virtual void ResetClip();
 339
 340     virtual void * GetNativeContext();
 341
 342     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
 343
 344     virtual bool SetCompositionMode(wxCompositionMode op);
 345
 346     virtual void BeginLayer(wxDouble opacity);
 347
 348     virtual void EndLayer();
 349
 350     virtual void StrokePath( const wxGraphicsPath& p );
 351     virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxWINDING_RULE );
 352
 353     virtual void Translate( wxDouble dx , wxDouble dy );
 354     virtual void Scale( wxDouble xScale , wxDouble yScale );
 355     virtual void Rotate( wxDouble angle );
 356
 357     // concatenates this transform with the current transform of this context
 358     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 359
 360     // sets the transform of this context
 361     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 362
 363     // gets the matrix of this context
 364     virtual wxGraphicsMatrix GetTransform() const;
 365
 366     virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 367     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 368     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 369     virtual void PushState();
 370     virtual void PopState();
 371
 372     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 373                                 wxDouble *descent, wxDouble *externalLeading ) const;
 374     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 375
 376 protected:
 377     virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
 378
 379 private:
 380     void Init(cairo_t *context);
 381
 382     cairo_t* m_context;
 383
 384     wxVector<float> m_layerOpacities;
 385
 386     wxDECLARE_NO_COPY_CLASS(wxCairoContext);
 387 };
 388
 389 //-----------------------------------------------------------------------------
 390 // wxCairoPenData implementation
 391 //-----------------------------------------------------------------------------
 392
 393 wxCairoPenData::~wxCairoPenData()
 394 {
 395     delete[] m_userLengths;
 396 }
 397
 398 void wxCairoPenData::Init()
 399 {
 400     m_lengths = NULL;
 401     m_userLengths = NULL;
 402     m_width = 0;
 403     m_count = 0;
 404 }
 405
 406 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 407 : wxGraphicsObjectRefData(renderer)
 408 {
 409     Init();
 410     m_pen = pen;
 411     m_width = m_pen.GetWidth();
 412     if (m_width <= 0.0)
 413         m_width = 0.1;
 414
 415     m_red = m_pen.GetColour().Red()/255.0;
 416     m_green = m_pen.GetColour().Green()/255.0;
 417     m_blue = m_pen.GetColour().Blue()/255.0;
 418     m_alpha = m_pen.GetColour().Alpha()/255.0;
 419
 420     switch ( m_pen.GetCap() )
 421     {
 422     case wxCAP_ROUND :
 423         m_cap = CAIRO_LINE_CAP_ROUND;
 424         break;
 425
 426     case wxCAP_PROJECTING :
 427         m_cap = CAIRO_LINE_CAP_SQUARE;
 428         break;
 429
 430     case wxCAP_BUTT :
 431         m_cap = CAIRO_LINE_CAP_BUTT;
 432         break;
 433
 434     default :
 435         m_cap = CAIRO_LINE_CAP_BUTT;
 436         break;
 437     }
 438
 439     switch ( m_pen.GetJoin() )
 440     {
 441     case wxJOIN_BEVEL :
 442         m_join = CAIRO_LINE_JOIN_BEVEL;
 443         break;
 444
 445     case wxJOIN_MITER :
 446         m_join = CAIRO_LINE_JOIN_MITER;
 447         break;
 448
 449     case wxJOIN_ROUND :
 450         m_join = CAIRO_LINE_JOIN_ROUND;
 451         break;
 452
 453     default :
 454         m_join = CAIRO_LINE_JOIN_MITER;
 455         break;
 456     }
 457
 458     const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
 459     const double dotted[] =
 460     {
 461         dashUnit , dashUnit + 2.0
 462     };
 463     static const double short_dashed[] =
 464     {
 465         9.0 , 6.0
 466     };
 467     static const double dashed[] =
 468     {
 469         19.0 , 9.0
 470     };
 471     static const double dotted_dashed[] =
 472     {
 473         9.0 , 6.0 , 3.0 , 3.0
 474     };
 475
 476     switch ( m_pen.GetStyle() )
 477     {
 478     case wxPENSTYLE_SOLID :
 479         break;
 480
 481     case wxPENSTYLE_DOT :
 482         m_count = WXSIZEOF(dotted);
 483         m_userLengths = new double[ m_count ] ;
 484         memcpy( m_userLengths, dotted, sizeof(dotted) );
 485         m_lengths = m_userLengths;
 486         break;
 487
 488     case wxPENSTYLE_LONG_DASH :
 489         m_lengths = dashed ;
 490         m_count = WXSIZEOF(dashed);
 491         break;
 492
 493     case wxPENSTYLE_SHORT_DASH :
 494         m_lengths = short_dashed ;
 495         m_count = WXSIZEOF(short_dashed);
 496         break;
 497
 498     case wxPENSTYLE_DOT_DASH :
 499         m_lengths = dotted_dashed ;
 500         m_count = WXSIZEOF(dotted_dashed);
 501         break;
 502
 503     case wxPENSTYLE_USER_DASH :
 504         {
 505             wxDash *wxdashes ;
 506             m_count = m_pen.GetDashes( &wxdashes ) ;
 507             if ((wxdashes != NULL) && (m_count > 0))
 508             {
 509                 m_userLengths = new double[m_count] ;
 510                 for ( int i = 0 ; i < m_count ; ++i )
 511                 {
 512                     m_userLengths[i] = wxdashes[i] * dashUnit ;
 513
 514                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 515                         m_userLengths[i] = dashUnit + 2.0 ;
 516                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 517                         m_userLengths[i] = dashUnit ;
 518                 }
 519             }
 520             m_lengths = m_userLengths ;
 521         }
 522         break;
 523     case wxPENSTYLE_STIPPLE :
 524         {
 525             /*
 526             wxBitmap* bmp = pen.GetStipple();
 527             if ( bmp && bmp->Ok() )
 528             {
 529             wxDELETE( m_penImage );
 530             wxDELETE( m_penBrush );
 531             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 532             m_penBrush = new TextureBrush(m_penImage);
 533             m_pen->SetBrush( m_penBrush );
 534             }
 535             */
 536         }
 537         break;
 538     default :
 539         if ( m_pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH
 540             && m_pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
 541         {
 542             /*
 543             wxDELETE( m_penBrush );
 544             HatchStyle style = HatchStyleHorizontal;
 545             switch( pen.GetStyle() )
 546             {
 547             case wxPENSTYLE_BDIAGONAL_HATCH :
 548             style = HatchStyleBackwardDiagonal;
 549             break ;
 550             case wxPENSTYLE_CROSSDIAG_HATCH :
 551             style = HatchStyleDiagonalCross;
 552             break ;
 553             case wxPENSTYLE_FDIAGONAL_HATCH :
 554             style = HatchStyleForwardDiagonal;
 555             break ;
 556             case wxPENSTYLE_CROSS_HATCH :
 557             style = HatchStyleCross;
 558             break ;
 559             case wxPENSTYLE_HORIZONTAL_HATCH :
 560             style = HatchStyleHorizontal;
 561             break ;
 562             case wxPENSTYLE_VERTICAL_HATCH :
 563             style = HatchStyleVertical;
 564             break ;
 565
 566             }
 567             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 568             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 569             m_pen->SetBrush( m_penBrush )
 570             */
 571         }
 572         break;
 573     }
 574 }
 575
 576 void wxCairoPenData::Apply( wxGraphicsContext* context )
 577 {
 578     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 579     cairo_set_line_width(ctext,m_width);
 580     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 581     cairo_set_line_cap(ctext,m_cap);
 582     cairo_set_line_join(ctext,m_join);
 583     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 584 }
 585
 586 //-----------------------------------------------------------------------------
 587 // wxCairoBrushData implementation
 588 //-----------------------------------------------------------------------------
 589
 590 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 591   : wxGraphicsObjectRefData( renderer )
 592 {
 593     Init();
 594 }
 595
 596 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
 597   : wxGraphicsObjectRefData(renderer)
 598 {
 599     Init();
 600
 601     m_red = brush.GetColour().Red()/255.0;
 602     m_green = brush.GetColour().Green()/255.0;
 603     m_blue = brush.GetColour().Blue()/255.0;
 604     m_alpha = brush.GetColour().Alpha()/255.0;
 605     /*
 606     if ( brush.GetStyle() == wxBRUSHSTYLE_SOLID)
 607     {
 608     m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 609     brush.GetColour().Green() , brush.GetColour().Blue() ) );
 610     }
 611     else if ( brush.IsHatch() )
 612     {
 613     HatchStyle style = HatchStyleHorizontal;
 614     switch( brush.GetStyle() )
 615     {
 616     case wxBRUSHSTYLE_BDIAGONAL_HATCH :
 617     style = HatchStyleBackwardDiagonal;
 618     break ;
 619     case wxBRUSHSTYLE_CROSSDIAG_HATCH :
 620     style = HatchStyleDiagonalCross;
 621     break ;
 622     case wxBRUSHSTYLE_FDIAGONAL_HATCH :
 623     style = HatchStyleForwardDiagonal;
 624     break ;
 625     case wxBRUSHSTYLE_CROSS_HATCH :
 626     style = HatchStyleCross;
 627     break ;
 628     case wxBRUSHSTYLE_HORIZONTAL_HATCH :
 629     style = HatchStyleHorizontal;
 630     break ;
 631     case wxBRUSHSTYLE_VERTICAL_HATCH :
 632     style = HatchStyleVertical;
 633     break ;
 634
 635     }
 636     m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 637     brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 638     }
 639     else
 640     {
 641     wxBitmap* bmp = brush.GetStipple();
 642     if ( bmp && bmp->Ok() )
 643     {
 644     wxDELETE( m_brushImage );
 645     m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 646     m_brush = new TextureBrush(m_brushImage);
 647     }
 648     }
 649     */
 650 }
 651
 652 wxCairoBrushData::~wxCairoBrushData ()
 653 {
 654     if (m_brushPattern)
 655         cairo_pattern_destroy(m_brushPattern);
 656 }
 657
 658 void wxCairoBrushData::Apply( wxGraphicsContext* context )
 659 {
 660     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 661     if ( m_brushPattern )
 662     {
 663         cairo_set_source(ctext,m_brushPattern);
 664     }
 665     else
 666     {
 667         cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 668     }
 669 }
 670
 671 void wxCairoBrushData::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 672         const wxColour&c1, const wxColour&c2 )
 673 {
 674     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 675     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,c1.Red()/255.0,
 676         c1.Green()/255.0, c1.Blue()/255.0,c1.Alpha()/255.0);
 677     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,c2.Red()/255.0,
 678         c2.Green()/255.0, c2.Blue()/255.0,c2.Alpha()/255.0);
 679     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 680 }
 681
 682 void wxCairoBrushData::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 683         const wxColour &oColor, const wxColour &cColor )
 684 {
 685     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 686     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,oColor.Red()/255.0,
 687         oColor.Green()/255.0, oColor.Blue()/255.0,oColor.Alpha()/255.0);
 688     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,cColor.Red()/255.0,
 689         cColor.Green()/255.0, cColor.Blue()/255.0,cColor.Alpha()/255.0);
 690     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 691 }
 692
 693 void wxCairoBrushData::Init()
 694 {
 695     m_brushPattern = NULL;
 696 }
 697
 698 //-----------------------------------------------------------------------------
 699 // wxCairoFontData implementation
 700 //-----------------------------------------------------------------------------
 701
 702 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 703                          const wxColour& col ) : wxGraphicsObjectRefData(renderer)
 704 {
 705     m_red = col.Red()/255.0;
 706     m_green = col.Green()/255.0;
 707     m_blue = col.Blue()/255.0;
 708     m_alpha = col.Alpha()/255.0;
 709     m_size = font.GetPointSize();
 710     m_underlined = font.GetUnderlined();
 711
 712 #ifdef __WXMAC__
 713     m_font = cairo_quartz_font_face_create_for_cgfont( font.OSXGetCGFont() );
 714 #elif defined(__WXGTK__)
 715     m_font = pango_font_description_copy( font.GetNativeFontInfo()->description );
 716 #else
 717     m_fontName = font.GetFaceName().mb_str(wxConvUTF8);
 718     m_slant = font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL;
 719     m_weight = font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL;
 720 #endif
 721 }
 722
 723 wxCairoFontData::~wxCairoFontData()
 724 {
 725 #ifdef __WXMAC__
 726     cairo_font_face_destroy( m_font );
 727 #elif defined(__WXGTK__)
 728     pango_font_description_free( m_font );
 729 #else
 730 #endif
 731 }
 732
 733 void wxCairoFontData::Apply( wxGraphicsContext* context )
 734 {
 735     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 736     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 737 #ifdef __WXGTK__
 738     // the rest is done using Pango layouts
 739 #elif defined(__WXMAC__)
 740     cairo_set_font_face(ctext, m_font);
 741     cairo_set_font_size(ctext, m_size );
 742 #else
 743     cairo_select_font_face(ctext, m_fontName, m_slant, m_weights );
 744     cairo_set_font_size(ctext, m_size );
 745 #endif
 746 }
 747
 748 //-----------------------------------------------------------------------------
 749 // wxCairoPathData implementation
 750 //-----------------------------------------------------------------------------
 751
 752 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
 753     : wxGraphicsPathData(renderer)
 754 {
 755     if (pathcontext)
 756     {
 757         m_pathContext = pathcontext;
 758     }
 759     else
 760     {
 761         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 762         m_pathContext = cairo_create(surface);
 763         cairo_surface_destroy (surface);
 764     }
 765 }
 766
 767 wxCairoPathData::~wxCairoPathData()
 768 {
 769     cairo_destroy(m_pathContext);
 770 }
 771
 772 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
 773 {
 774     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 775     cairo_t* pathcontext = cairo_create(surface);
 776     cairo_surface_destroy (surface);
 777
 778     cairo_path_t* path = cairo_copy_path(m_pathContext);
 779     cairo_append_path(pathcontext, path);
 780     cairo_path_destroy(path);
 781     return new wxCairoPathData( GetRenderer() ,pathcontext);
 782 }
 783
 784
 785 void* wxCairoPathData::GetNativePath() const
 786 {
 787     return cairo_copy_path(m_pathContext) ;
 788 }
 789
 790 void wxCairoPathData::UnGetNativePath(void *p) const
 791 {
 792     cairo_path_destroy((cairo_path_t*)p);
 793 }
 794
 795 //
 796 // The Primitives
 797 //
 798
 799 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
 800 {
 801     cairo_move_to(m_pathContext,x,y);
 802 }
 803
 804 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
 805 {
 806     cairo_line_to(m_pathContext,x,y);
 807 }
 808
 809 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
 810 {
 811     cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
 812     cairo_append_path(m_pathContext, p);
 813     UnGetNativePath(p);
 814 }
 815
 816 void wxCairoPathData::CloseSubpath()
 817 {
 818     cairo_close_path(m_pathContext);
 819 }
 820
 821 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 822 {
 823     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
 824 }
 825
 826 // gets the last point of the current path, (0,0) if not yet set
 827 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
 828 {
 829     double dx,dy;
 830     cairo_get_current_point(m_pathContext,&dx,&dy);
 831     if (x)
 832         *x = dx;
 833     if (y)
 834         *y = dy;
 835 }
 836
 837 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 838 {
 839     // as clockwise means positive in our system (y pointing downwards)
 840     // TODO make this interpretation dependent of the
 841     // real device trans
 842     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
 843         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
 844     else
 845         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
 846 }
 847
 848 // transforms each point of this path by the matrix
 849 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
 850 {
 851     // as we don't have a true path object, we have to apply the inverse
 852     // matrix to the context
 853     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
 854     cairo_matrix_invert( &m );
 855     cairo_transform(m_pathContext,&m);
 856 }
 857
 858 // gets the bounding box enclosing all points (possibly including control points)
 859 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
 860 {
 861     double x1,y1,x2,y2;
 862
 863     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
 864     if ( x2 < x1 )
 865     {
 866         *x = x2;
 867         *w = x1-x2;
 868     }
 869     else
 870     {
 871         *x = x1;
 872         *w = x2-x1;
 873     }
 874
 875     if( y2 < y1 )
 876     {
 877         *y = y2;
 878         *h = y1-y2;
 879     }
 880     else
 881     {
 882         *y = y1;
 883         *h = y2-y1;
 884     }
 885 }
 886
 887 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode WXUNUSED(fillStyle) ) const
 888 {
 889     return cairo_in_stroke( m_pathContext, x, y) != 0;
 890 }
 891
 892 //-----------------------------------------------------------------------------
 893 // wxCairoMatrixData implementation
 894 //-----------------------------------------------------------------------------
 895
 896 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
 897     : wxGraphicsMatrixData(renderer)
 898 {
 899     if ( matrix )
 900         m_matrix = *matrix;
 901 }
 902
 903 wxCairoMatrixData::~wxCairoMatrixData()
 904 {
 905     // nothing to do
 906 }
 907
 908 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
 909 {
 910     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
 911 }
 912
 913 // concatenates the matrix
 914 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
 915 {
 916     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
 917 }
 918
 919 // sets the matrix to the respective values
 920 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
 921                         wxDouble tx, wxDouble ty)
 922 {
 923     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
 924 }
 925
 926 // gets the component valuess of the matrix
 927 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
 928                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
 929 {
 930     if (a)  *a = m_matrix.xx;
 931     if (b)  *b = m_matrix.yx;
 932     if (c)  *c = m_matrix.xy;
 933     if (d)  *d = m_matrix.yy;
 934     if (tx) *tx= m_matrix.x0;
 935     if (ty) *ty= m_matrix.y0;
 936 }
 937
 938 // makes this the inverse matrix
 939 void wxCairoMatrixData::Invert()
 940 {
 941     cairo_matrix_invert( &m_matrix );
 942 }
 943
 944 // returns true if the elements of the transformation matrix are equal ?
 945 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
 946 {
 947     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
 948     return (
 949         m_matrix.xx == tm->xx &&
 950         m_matrix.yx == tm->yx &&
 951         m_matrix.xy == tm->xy &&
 952         m_matrix.yy == tm->yy &&
 953         m_matrix.x0 == tm->x0 &&
 954         m_matrix.y0 == tm->y0 ) ;
 955 }
 956
 957 // return true if this is the identity matrix
 958 bool wxCairoMatrixData::IsIdentity() const
 959 {
 960     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
 961         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
 962 }
 963
 964 //
 965 // transformation
 966 //
 967
 968 // add the translation to this matrix
 969 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
 970 {
 971     cairo_matrix_translate( &m_matrix, dx, dy) ;
 972 }
 973
 974 // add the scale to this matrix
 975 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
 976 {
 977     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
 978 }
 979
 980 // add the rotation to this matrix (radians)
 981 void wxCairoMatrixData::Rotate( wxDouble angle )
 982 {
 983     cairo_matrix_rotate( &m_matrix, angle) ;
 984 }
 985
 986 //
 987 // apply the transforms
 988 //
 989
 990 // applies that matrix to the point
 991 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
 992 {
 993     double lx = *x, ly = *y ;
 994     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
 995     *x = lx;
 996     *y = ly;
 997 }
 998
 999 // applies the matrix except for translations
1000 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1001 {
1002     double lx = *dx, ly = *dy ;
1003     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1004     *dx = lx;
1005     *dy = ly;
1006 }
1007
1008 // returns the native representation
1009 void * wxCairoMatrixData::GetNativeMatrix() const
1010 {
1011     return (void*) &m_matrix;
1012 }
1013
1014 // wxCairoBitmap implementation
1015 //-----------------------------------------------------------------------------
1016
1017 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp ) : wxGraphicsObjectRefData( renderer )
1018 {
1019     wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1020
1021     cairo_surface_t* surface;
1022     int bw = bmp.GetWidth();
1023     int bh = bmp.GetHeight();
1024     wxBitmap bmpSource = bmp;  // we need a non-const instance
1025     m_buffer = new unsigned char[bw*bh*4];
1026     wxUint32* data = (wxUint32*)m_buffer;
1027
1028     // Create a surface object and copy the bitmap pixel data to it.  if the
1029     // image has alpha (or a mask represented as alpha) then we'll use a
1030     // different format and iterator than if it doesn't...
1031     if (bmpSource.HasAlpha() || bmpSource.GetMask())
1032     {
1033         m_surface = cairo_image_surface_create_for_data(
1034             m_buffer, CAIRO_FORMAT_ARGB32, bw, bh, bw*4);
1035         wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1036         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1037
1038         wxAlphaPixelData::Iterator p(pixData);
1039         for (int y=0; y<bh; y++)
1040         {
1041             wxAlphaPixelData::Iterator rowStart = p;
1042             for (int x=0; x<bw; x++)
1043             {
1044                 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1045                 // with alpha in the upper 8 bits, then red, then green, then
1046                 // blue. The 32-bit quantities are stored native-endian.
1047                 // Pre-multiplied alpha is used.
1048                 unsigned char alpha = p.Alpha();
1049                 if (alpha == 0)
1050                     *data = 0;
1051                 else
1052                     *data = ( alpha                      << 24
1053                               | (p.Red() * alpha/255)    << 16
1054                               | (p.Green() * alpha/255)  <<  8
1055                               | (p.Blue() * alpha/255) );
1056                 ++data;
1057                 ++p;
1058             }
1059             p = rowStart;
1060             p.OffsetY(pixData, 1);
1061         }
1062     }
1063     else  // no alpha
1064     {
1065         m_surface = cairo_image_surface_create_for_data(
1066             m_buffer, CAIRO_FORMAT_RGB24, bw, bh, bw*4);
1067         wxNativePixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1068         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1069
1070         wxNativePixelData::Iterator p(pixData);
1071         for (int y=0; y<bh; y++)
1072         {
1073             wxNativePixelData::Iterator rowStart = p;
1074             for (int x=0; x<bw; x++)
1075             {
1076                 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1077                 // the upper 8 bits unused. Red, Green, and Blue are stored in
1078                 // the remaining 24 bits in that order.  The 32-bit quantities
1079                 // are stored native-endian.
1080                 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1081                 ++data;
1082                 ++p;
1083             }
1084             p = rowStart;
1085             p.OffsetY(pixData, 1);
1086         }
1087     }
1088 }
1089
1090 wxCairoBitmapData::~wxCairoBitmapData()
1091 {
1092     cairo_pattern_destroy(m_pattern);
1093     cairo_surface_destroy(m_surface);
1094     delete [] m_buffer;
1095 }
1096
1097
1098
1099 //-----------------------------------------------------------------------------
1100 // wxCairoContext implementation
1101 //-----------------------------------------------------------------------------
1102
1103 class wxCairoOffsetHelper
1104 {
1105 public :
1106     wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1107     {
1108         m_ctx = ctx;
1109         m_offset = offset;
1110         if ( m_offset )
1111              cairo_translate( m_ctx, 0.5, 0.5 );
1112     }
1113     ~wxCairoOffsetHelper( )
1114     {
1115         if ( m_offset )
1116             cairo_translate( m_ctx, -0.5, -0.5 );
1117     }
1118 public :
1119     cairo_t* m_ctx;
1120     bool m_offset;
1121 } ;
1122
1123 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1124 : wxGraphicsContext(renderer)
1125 {
1126 #ifdef __WXGTK20__
1127     const wxDCImpl *impl = dc.GetImpl();
1128     Init( (cairo_t*) impl->GetCairoContext() );
1129
1130     wxPoint org = dc.GetDeviceOrigin();
1131     cairo_translate( m_context, org.x, org.y );
1132
1133     double sx,sy;
1134     dc.GetUserScale( &sx, &sy );
1135     cairo_scale( m_context, sx, sy );
1136
1137     org = dc.GetLogicalOrigin();
1138     cairo_translate( m_context, -org.x, -org.y );
1139 #endif
1140 }
1141
1142 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1143 : wxGraphicsContext(renderer)
1144 {
1145 #ifdef __WXGTK20__
1146     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1147     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1148
1149 #if 0
1150     wxGraphicsMatrix matrix = CreateMatrix();
1151
1152     wxPoint org = dc.GetDeviceOrigin();
1153     matrix.Translate( org.x, org.y );
1154
1155     org = dc.GetLogicalOrigin();
1156     matrix.Translate( -org.x, -org.y );
1157
1158     double sx,sy;
1159     dc.GetUserScale( &sx, &sy );
1160     matrix.Scale( sx, sy );
1161
1162     ConcatTransform( matrix );
1163 #endif
1164 #endif
1165
1166 #ifdef __WXMAC__
1167     int width, height;
1168     dc.GetSize( &width, &height );
1169     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1170     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1171     Init( cairo_create( surface ) );
1172     cairo_surface_destroy( surface );
1173 #endif
1174 }
1175
1176 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1177 : wxGraphicsContext(renderer)
1178 {
1179 #ifdef __WXGTK20__
1180     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1181     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1182
1183 #if 0
1184     wxGraphicsMatrix matrix = CreateMatrix();
1185
1186     wxPoint org = dc.GetDeviceOrigin();
1187     matrix.Translate( org.x, org.y );
1188
1189     org = dc.GetLogicalOrigin();
1190     matrix.Translate( -org.x, -org.y );
1191
1192     double sx,sy;
1193     dc.GetUserScale( &sx, &sy );
1194     matrix.Scale( sx, sy );
1195
1196     ConcatTransform( matrix );
1197 #endif
1198 #endif
1199
1200 #ifdef __WXMAC__
1201     int width, height;
1202     dc.GetSize( &width, &height );
1203     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1204     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1205     Init( cairo_create( surface ) );
1206     cairo_surface_destroy( surface );
1207 #endif
1208 }
1209
1210 #ifdef __WXGTK20__
1211 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
1212 : wxGraphicsContext(renderer)
1213 {
1214     Init( gdk_cairo_create( drawable ) );
1215 }
1216 #endif
1217
1218 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1219 : wxGraphicsContext(renderer)
1220 {
1221     Init( context );
1222 }
1223
1224 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1225 : wxGraphicsContext(renderer)
1226 {
1227 #ifdef __WXGTK__
1228     // something along these lines (copied from dcclient)
1229
1230     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1231     // code should still be able to create wxClientDCs for them, so we will
1232     // use the parent window here then.
1233     if (window->m_wxwindow == NULL)
1234     {
1235         window = window->GetParent();
1236     }
1237
1238     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1239
1240     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1241 #endif
1242 }
1243
1244 wxCairoContext::~wxCairoContext()
1245 {
1246     if ( m_context )
1247     {
1248         PopState();
1249         PopState();
1250         cairo_destroy(m_context);
1251     }
1252 }
1253
1254 void wxCairoContext::Init(cairo_t *context)
1255 {
1256     m_context = context ;
1257     PushState();
1258     PushState();
1259 }
1260
1261
1262 void wxCairoContext::Clip( const wxRegion& region )
1263 {
1264     // Create a path with all the rectangles in the region
1265     wxGraphicsPath path = GetRenderer()->CreatePath();
1266     wxRegionIterator ri(region);
1267     while (ri)
1268     {
1269         path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1270         ++ri;
1271     }
1272
1273     // Put it in the context
1274     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1275     cairo_append_path(m_context, cp);
1276
1277     // clip to that path
1278     cairo_clip(m_context);
1279     path.UnGetNativePath(cp);
1280 }
1281
1282 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1283 {
1284     // Create a path with this rectangle
1285     wxGraphicsPath path = GetRenderer()->CreatePath();
1286     path.AddRectangle(x,y,w,h);
1287
1288     // Put it in the context
1289     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1290     cairo_append_path(m_context, cp);
1291
1292     // clip to that path
1293     cairo_clip(m_context);
1294     path.UnGetNativePath(cp);
1295 }
1296
1297 void wxCairoContext::ResetClip()
1298 {
1299     cairo_reset_clip(m_context);
1300 }
1301
1302
1303 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1304 {
1305     if ( !m_pen.IsNull() )
1306     {
1307         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1308         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1309         cairo_append_path(m_context,cp);
1310         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1311         cairo_stroke(m_context);
1312         path.UnGetNativePath(cp);
1313     }
1314 }
1315
1316 void wxCairoContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1317 {
1318     if ( !m_brush.IsNull() )
1319     {
1320         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1321         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1322         cairo_append_path(m_context,cp);
1323         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1324         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1325         cairo_fill(m_context);
1326         path.UnGetNativePath(cp);
1327     }
1328 }
1329
1330 void wxCairoContext::Rotate( wxDouble angle )
1331 {
1332     cairo_rotate(m_context,angle);
1333 }
1334
1335 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1336 {
1337     cairo_translate(m_context,dx,dy);
1338 }
1339
1340 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1341 {
1342     cairo_scale(m_context,xScale,yScale);
1343 }
1344
1345 // concatenates this transform with the current transform of this context
1346 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1347 {
1348     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1349 }
1350
1351 // sets the transform of this context
1352 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1353 {
1354     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1355 }
1356
1357 // gets the matrix of this context
1358 wxGraphicsMatrix wxCairoContext::GetTransform() const
1359 {
1360     wxGraphicsMatrix matrix = CreateMatrix();
1361     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1362     return matrix;
1363 }
1364
1365
1366
1367 void wxCairoContext::PushState()
1368 {
1369     cairo_save(m_context);
1370 }
1371
1372 void wxCairoContext::PopState()
1373 {
1374     cairo_restore(m_context);
1375 }
1376
1377 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1378 {
1379     wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp);
1380     DrawBitmap(bitmap, x, y, w, h);
1381
1382 }
1383
1384 void wxCairoContext::DrawBitmap(const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1385 {
1386     PushState();
1387
1388     // In case we're scaling the image by using a width and height different
1389     // than the bitmap's size create a pattern transformation on the surface and
1390     // draw the transformed pattern.
1391     wxCairoBitmapData* data = static_cast<wxCairoBitmapData*>(bmp.GetRefData());
1392     cairo_pattern_t* pattern = data->GetCairoPattern();
1393     wxSize size = data->GetSize();
1394
1395     wxDouble scaleX = w / size.GetWidth();
1396     wxDouble scaleY = h / size.GetHeight();
1397     cairo_scale(m_context, scaleX, scaleY);
1398
1399     // prepare to draw the image
1400     cairo_translate(m_context, x, y);
1401     cairo_set_source(m_context, pattern);
1402     // use the original size here since the context is scaled already...
1403     cairo_rectangle(m_context, 0, 0, size.GetWidth(), size.GetHeight());
1404     // fill the rectangle using the pattern
1405     cairo_fill(m_context);
1406
1407     PopState();
1408 }
1409
1410 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1411 {
1412     // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
1413     // start using the Cairo backend on other platforms then we may need to
1414     // fiddle with this...
1415     DrawBitmap(icon, x, y, w, h);
1416 }
1417
1418
1419 void wxCairoContext::DoDrawText(const wxString& str, wxDouble x, wxDouble y)
1420 {
1421     wxCHECK_RET( !m_font.IsNull(),
1422                  wxT("wxCairoContext::DrawText - no valid font set") );
1423
1424     if ( str.empty())
1425         return;
1426
1427     const wxCharBuffer data = str.utf8_str();
1428     if ( !data )
1429         return;
1430
1431     ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
1432
1433 #ifdef __WXGTK__
1434     size_t datalen = strlen(data);
1435
1436     PangoLayout *layout = pango_cairo_create_layout (m_context);
1437     wxCairoFontData* font_data = (wxCairoFontData*) m_font.GetRefData();
1438     pango_layout_set_font_description( layout, font_data->GetFont());
1439     pango_layout_set_text(layout, data, datalen);
1440
1441     if (font_data->GetUnderlined())
1442     {
1443         PangoAttrList *attrs = pango_attr_list_new();
1444         PangoAttribute *attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
1445         pango_attr_list_insert(attrs, attr);
1446         pango_layout_set_attributes(layout, attrs);
1447         pango_attr_list_unref(attrs);
1448     }
1449
1450     cairo_move_to(m_context, x, y);
1451     pango_cairo_show_layout (m_context, layout);
1452
1453     g_object_unref (layout);
1454 #else
1455     // Cairo's x,y for drawing text is at the baseline, so we need to adjust
1456     // the position we move to by the ascent.
1457     cairo_font_extents_t fe;
1458     cairo_font_extents(m_context, &fe);
1459     cairo_move_to(m_context, x, y+fe.ascent);
1460
1461     cairo_show_text(m_context, data);
1462 #endif
1463 }
1464
1465 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1466                                     wxDouble *descent, wxDouble *externalLeading ) const
1467 {
1468     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
1469
1470     if ( width )
1471         *width = 0;
1472     if ( height )
1473         *height = 0;
1474     if ( descent )
1475         *descent = 0;
1476     if ( externalLeading )
1477         *externalLeading = 0;
1478
1479     if ( str.empty())
1480         return;
1481
1482 #ifdef __WXGTK__
1483     int w, h;
1484
1485     PangoLayout *layout = pango_cairo_create_layout (m_context);
1486     pango_layout_set_font_description( layout, ((wxCairoFontData*)m_font.GetRefData())->GetFont());
1487     const wxCharBuffer data = str.utf8_str();
1488     if ( !data )
1489     {
1490         return;
1491     }
1492     pango_layout_set_text( layout, data, strlen(data) );
1493     pango_layout_get_pixel_size (layout, &w, &h);
1494     if ( width )
1495         *width = w;
1496     if ( height )
1497         *height = h;
1498     if (descent)
1499     {
1500         PangoLayoutIter *iter = pango_layout_get_iter(layout);
1501         int baseline = pango_layout_iter_get_baseline(iter);
1502         pango_layout_iter_free(iter);
1503         *descent = h - PANGO_PIXELS(baseline);
1504     }
1505     g_object_unref (layout);
1506 #else
1507     ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this);
1508
1509     if (width)
1510     {
1511         const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
1512         cairo_text_extents_t te;
1513         cairo_text_extents(m_context, buf, &te);
1514         *width = te.width;
1515     }
1516
1517     if (height || descent || externalLeading)
1518     {
1519         cairo_font_extents_t fe;
1520         cairo_font_extents(m_context, &fe);
1521
1522         // some backends have negative descents
1523
1524         if ( fe.descent < 0 )
1525             fe.descent = -fe.descent;
1526
1527         if ( fe.height < (fe.ascent + fe.descent ) )
1528         {
1529             // some backends are broken re height ... (eg currently ATSUI)
1530             fe.height = fe.ascent + fe.descent;
1531         }
1532
1533         if (height)
1534             *height = fe.height;
1535         if ( descent )
1536             *descent = fe.descent;
1537         if ( externalLeading )
1538             *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
1539     }
1540 #endif
1541 }
1542
1543 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
1544 {
1545     widths.Empty();
1546     widths.Add(0, text.length());
1547
1548     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
1549
1550     if (text.empty())
1551         return;
1552
1553     // TODO
1554 }
1555
1556 void * wxCairoContext::GetNativeContext()
1557 {
1558     return m_context;
1559 }
1560
1561 bool wxCairoContext::SetAntialiasMode(wxAntialiasMode antialias)
1562 {
1563     if (m_antialias == antialias)
1564         return true;
1565
1566     m_antialias = antialias;
1567
1568     cairo_antialias_t antialiasMode;
1569     switch (antialias)
1570     {
1571         case wxANTIALIAS_DEFAULT:
1572             antialiasMode = CAIRO_ANTIALIAS_DEFAULT;
1573             break;
1574         case wxANTIALIAS_NONE:
1575             antialiasMode = CAIRO_ANTIALIAS_NONE;
1576             break;
1577         default:
1578             return false;
1579     }
1580     cairo_set_antialias(m_context, antialiasMode);
1581     return true;
1582 }
1583
1584 bool wxCairoContext::SetCompositionMode(wxCompositionMode op)
1585 {
1586     if ( m_composition == op )
1587         return true;
1588
1589     m_composition = op;
1590     cairo_operator_t cop;
1591     switch (op)
1592     {
1593         case wxCOMPOSITION_CLEAR:
1594             cop = CAIRO_OPERATOR_CLEAR;
1595             break;
1596         case wxCOMPOSITION_SOURCE:
1597             cop = CAIRO_OPERATOR_SOURCE;
1598             break;
1599         case wxCOMPOSITION_OVER:
1600             cop = CAIRO_OPERATOR_OVER;
1601             break;
1602         case wxCOMPOSITION_IN:
1603             cop = CAIRO_OPERATOR_IN;
1604             break;
1605         case wxCOMPOSITION_OUT:
1606             cop = CAIRO_OPERATOR_OUT;
1607             break;
1608         case wxCOMPOSITION_ATOP:
1609             cop = CAIRO_OPERATOR_ATOP;
1610             break;
1611         case wxCOMPOSITION_DEST:
1612             cop = CAIRO_OPERATOR_DEST;
1613             break;
1614         case wxCOMPOSITION_DEST_OVER:
1615             cop = CAIRO_OPERATOR_DEST_OVER;
1616             break;
1617         case wxCOMPOSITION_DEST_IN:
1618             cop = CAIRO_OPERATOR_DEST_IN;
1619             break;
1620         case wxCOMPOSITION_DEST_OUT:
1621             cop = CAIRO_OPERATOR_DEST_OUT;
1622             break;
1623         case wxCOMPOSITION_DEST_ATOP:
1624             cop = CAIRO_OPERATOR_DEST_ATOP;
1625             break;
1626         case wxCOMPOSITION_XOR:
1627             cop = CAIRO_OPERATOR_XOR;
1628             break;
1629         case wxCOMPOSITION_ADD:
1630             cop = CAIRO_OPERATOR_ADD;
1631             break;
1632         default:
1633             return false;
1634     }
1635     cairo_set_operator(m_context, cop);
1636     return true;
1637 }
1638
1639 void wxCairoContext::BeginLayer(wxDouble opacity)
1640 {
1641     m_layerOpacities.push_back(opacity);
1642     cairo_push_group(m_context);
1643 }
1644
1645 void wxCairoContext::EndLayer()
1646 {
1647     float opacity = m_layerOpacities.back();
1648     m_layerOpacities.pop_back();
1649     cairo_pop_group_to_source(m_context);
1650     cairo_paint_with_alpha(m_context,opacity);
1651 }
1652
1653 //-----------------------------------------------------------------------------
1654 // wxCairoRenderer declaration
1655 //-----------------------------------------------------------------------------
1656
1657 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
1658 {
1659 public :
1660     wxCairoRenderer() {}
1661
1662     virtual ~wxCairoRenderer() {}
1663
1664     // Context
1665
1666     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
1667     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
1668     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
1669
1670     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
1671
1672     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
1673
1674     virtual wxGraphicsContext * CreateContext( wxWindow* window );
1675
1676     virtual wxGraphicsContext * CreateMeasuringContext();
1677
1678     // Path
1679
1680     virtual wxGraphicsPath CreatePath();
1681
1682     // Matrix
1683
1684     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
1685         wxDouble tx=0.0, wxDouble ty=0.0);
1686
1687
1688     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
1689
1690     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
1691
1692     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1693     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1694         const wxColour&c1, const wxColour&c2) ;
1695
1696     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1697     // with radius r and color cColor
1698     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1699         const wxColour &oColor, const wxColour &cColor) ;
1700
1701     // sets the font
1702     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
1703
1704     // create a native bitmap representation
1705     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap );
1706
1707     // create a subimage from a native image representation
1708     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  );
1709
1710 private :
1711     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
1712 } ;
1713
1714 //-----------------------------------------------------------------------------
1715 // wxCairoRenderer implementation
1716 //-----------------------------------------------------------------------------
1717
1718 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
1719
1720 static wxCairoRenderer gs_cairoGraphicsRenderer;
1721 // temporary hack to allow creating a cairo context on any platform
1722 extern wxGraphicsRenderer* gCairoRenderer;
1723 wxGraphicsRenderer* gCairoRenderer = &gs_cairoGraphicsRenderer;
1724
1725 #ifdef __WXGTK__
1726 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
1727 {
1728     return &gs_cairoGraphicsRenderer;
1729 }
1730 #endif
1731
1732 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
1733 {
1734     return new wxCairoContext(this,dc);
1735 }
1736
1737 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
1738 {
1739     return new wxCairoContext(this,dc);
1740 }
1741
1742 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
1743 {
1744 #ifdef __WXGTK20__
1745     const wxDCImpl *impl = dc.GetImpl();
1746     cairo_t* context = (cairo_t*) impl->GetCairoContext();
1747     if (context)
1748        return new wxCairoContext(this,dc);
1749     else
1750 #endif
1751        return NULL;
1752 }
1753
1754 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
1755 {
1756     return new wxCairoContext(this,(cairo_t*)context);
1757 }
1758
1759
1760 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
1761 {
1762 #ifdef __WXGTK__
1763     return new wxCairoContext(this,(GdkDrawable*)window);
1764 #else
1765     return NULL;
1766 #endif
1767 }
1768
1769 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
1770 {
1771 #ifdef __WXGTK__
1772     return CreateContextFromNativeWindow(gdk_get_default_root_window());
1773 #endif
1774     return NULL;
1775     // TODO
1776 }
1777
1778 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
1779 {
1780     return new wxCairoContext(this, window );
1781 }
1782
1783 // Path
1784
1785 wxGraphicsPath wxCairoRenderer::CreatePath()
1786 {
1787     wxGraphicsPath path;
1788     path.SetRefData( new wxCairoPathData(this) );
1789     return path;
1790 }
1791
1792
1793 // Matrix
1794
1795 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1796                                                 wxDouble tx, wxDouble ty)
1797
1798 {
1799     wxGraphicsMatrix m;
1800     wxCairoMatrixData* data = new wxCairoMatrixData( this );
1801     data->Set( a,b,c,d,tx,ty ) ;
1802     m.SetRefData(data);
1803     return m;
1804 }
1805
1806 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
1807 {
1808     if ( !pen.Ok() || pen.GetStyle() == wxPENSTYLE_TRANSPARENT )
1809         return wxNullGraphicsPen;
1810     else
1811     {
1812         wxGraphicsPen p;
1813         p.SetRefData(new wxCairoPenData( this, pen ));
1814         return p;
1815     }
1816 }
1817
1818 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
1819 {
1820     if ( !brush.Ok() || brush.GetStyle() == wxBRUSHSTYLE_TRANSPARENT )
1821         return wxNullGraphicsBrush;
1822     else
1823     {
1824         wxGraphicsBrush p;
1825         p.SetRefData(new wxCairoBrushData( this, brush ));
1826         return p;
1827     }
1828 }
1829
1830 // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1831 wxGraphicsBrush wxCairoRenderer::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1832                                                                       const wxColour&c1, const wxColour&c2)
1833 {
1834     wxGraphicsBrush p;
1835     wxCairoBrushData* d = new wxCairoBrushData( this );
1836     d->CreateLinearGradientBrush(x1, y1, x2, y2, c1, c2);
1837     p.SetRefData(d);
1838     return p;
1839 }
1840
1841 // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1842 // with radius r and color cColor
1843 wxGraphicsBrush wxCairoRenderer::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1844                                                                       const wxColour &oColor, const wxColour &cColor)
1845 {
1846     wxGraphicsBrush p;
1847     wxCairoBrushData* d = new wxCairoBrushData( this );
1848     d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,oColor,cColor);
1849     p.SetRefData(d);
1850     return p;
1851 }
1852
1853 // sets the font
1854 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
1855 {
1856     if ( font.Ok() )
1857     {
1858         wxGraphicsFont p;
1859         p.SetRefData(new wxCairoFontData( this , font, col ));
1860         return p;
1861     }
1862     else
1863         return wxNullGraphicsFont;
1864 }
1865
1866 wxGraphicsBitmap wxCairoRenderer::CreateBitmap( const wxBitmap& bmp )
1867 {
1868     if ( bmp.Ok() )
1869     {
1870         wxGraphicsBitmap p;
1871         p.SetRefData(new wxCairoBitmapData( this , bmp ));
1872         return p;
1873     }
1874     else
1875         return wxNullGraphicsBitmap;
1876 }
1877
1878 wxGraphicsBitmap wxCairoRenderer::CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  )
1879 {
1880     wxFAIL_MSG("wxCairoRenderer::CreateSubBitmap is not implemented.");
1881     return wxNullGraphicsBitmap;
1882 }
1883
1884 #endif  // wxUSE_GRAPHICS_CONTEXT