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