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