src/generic/graphicc.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/graphicc.cpp
   3 // Purpose:     cairo device context class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     2006-10-03
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2006 Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #if wxUSE_GRAPHICS_CONTEXT
  19
  20 #ifndef WX_PRECOMP
  21     #include "wx/bitmap.h"
  22     #include "wx/icon.h"
  23
  24     #include "wx/dc.h"
  25     #include "wx/dcclient.h"
  26     #include "wx/dcmemory.h"
  27     #include "wx/dcprint.h"
  28 #endif
  29
  30 #include "wx/private/graphics.h"
  31 #include "wx/rawbmp.h"
  32
  33 using namespace std;
  34
  35 //-----------------------------------------------------------------------------
  36 // constants
  37 //-----------------------------------------------------------------------------
  38
  39 const double RAD2DEG = 180.0 / M_PI;
  40
  41 //-----------------------------------------------------------------------------
  42 // Local functions
  43 //-----------------------------------------------------------------------------
  44
  45 static inline double dmin(double a, double b)
  46 {
  47     return a < b ? a : b;
  48 }
  49 static inline double dmax(double a, double b)
  50 {
  51     return a > b ? a : b;
  52 }
  53
  54 static inline double DegToRad(double deg)
  55 {
  56     return (deg * M_PI) / 180.0;
  57 }
  58 static inline double RadToDeg(double deg)
  59 {
  60     return (deg * 180.0) / M_PI;
  61 }
  62
  63 //-----------------------------------------------------------------------------
  64 // device context implementation
  65 //
  66 // more and more of the dc functionality should be implemented by calling
  67 // the appropricate wxCairoContext, but we will have to do that step by step
  68 // also coordinate conversions should be moved to native matrix ops
  69 //-----------------------------------------------------------------------------
  70
  71 // we always stock two context states, one at entry, to be able to preserve the
  72 // state we were called with, the other one after changing to HI Graphics orientation
  73 // (this one is used for getting back clippings etc)
  74
  75 //-----------------------------------------------------------------------------
  76 // wxGraphicsPath implementation
  77 //-----------------------------------------------------------------------------
  78
  79 // TODO remove this dependency (gdiplus needs the macros)
  80
  81 #ifndef max
  82 #define max(a,b)            (((a) > (b)) ? (a) : (b))
  83 #endif
  84
  85 #ifndef min
  86 #define min(a,b)            (((a) < (b)) ? (a) : (b))
  87 #endif
  88
  89 #include <cairo.h>
  90 #ifdef __WXGTK__
  91 #include <gtk/gtk.h>
  92 #include "wx/fontutil.h"
  93 #include "wx/gtk/dc.h"
  94 #endif
  95
  96 #ifdef __WXMSW__
  97 #include <cairo-win32.h>
  98 #endif
  99
 100 #ifdef __WXMAC__
 101 #include "wx/osx/private.h"
 102 #include <cairo-quartz.h>
 103 #include <cairo-atsui.h>
 104 #endif
 105
 106 class WXDLLIMPEXP_CORE wxCairoPathData : public wxGraphicsPathData
 107 {
 108 public :
 109     wxCairoPathData(wxGraphicsRenderer* renderer, cairo_t* path = NULL);
 110     ~wxCairoPathData();
 111
 112     virtual wxGraphicsObjectRefData *Clone() const;
 113
 114     //
 115     // These are the path primitives from which everything else can be constructed
 116     //
 117
 118     // begins a new subpath at (x,y)
 119     virtual void MoveToPoint( wxDouble x, wxDouble y );
 120
 121     // adds a straight line from the current point to (x,y)
 122     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 123
 124     // adds a cubic Bezier curve from the current point, using two control points and an end point
 125     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 126
 127
 128     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 129     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 130
 131     // gets the last point of the current path, (0,0) if not yet set
 132     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 133
 134     // adds another path
 135     virtual void AddPath( const wxGraphicsPathData* path );
 136
 137     // closes the current sub-path
 138     virtual void CloseSubpath();
 139
 140     //
 141     // These are convenience functions which - if not available natively will be assembled
 142     // using the primitives from above
 143     //
 144
 145     /*
 146
 147     // appends a rectangle as a new closed subpath
 148     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 149     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 150     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 151
 152     // draws a an arc to two tangents connecting (current) to (x1,y1) and (x1,y1) to (x2,y2), also a straight line from (current) to (x1,y1)
 153     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 154     */
 155
 156     // returns the native path
 157     virtual void * GetNativePath() const ;
 158
 159     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 160     virtual void UnGetNativePath(void *p) const;
 161
 162     // transforms each point of this path by the matrix
 163     virtual void Transform( const wxGraphicsMatrixData* matrix ) ;
 164
 165     // gets the bounding box enclosing all points (possibly including control points)
 166     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
 167
 168     virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxWINDING_RULE) const;
 169
 170 private :
 171     cairo_t* m_pathContext;
 172 };
 173
 174 class WXDLLIMPEXP_CORE wxCairoMatrixData : public wxGraphicsMatrixData
 175 {
 176 public :
 177     wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix = NULL ) ;
 178     virtual ~wxCairoMatrixData() ;
 179
 180     virtual wxGraphicsObjectRefData *Clone() const ;
 181
 182     // concatenates the matrix
 183     virtual void Concat( const wxGraphicsMatrixData *t );
 184
 185     // sets the matrix to the respective values
 186     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 187         wxDouble tx=0.0, wxDouble ty=0.0);
 188
 189     // gets the component valuess of the matrix
 190     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
 191                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
 192
 193     // makes this the inverse matrix
 194     virtual void Invert();
 195
 196     // returns true if the elements of the transformation matrix are equal ?
 197     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
 198
 199     // return true if this is the identity matrix
 200     virtual bool IsIdentity() const;
 201
 202     //
 203     // transformation
 204     //
 205
 206     // add the translation to this matrix
 207     virtual void Translate( wxDouble dx , wxDouble dy );
 208
 209     // add the scale to this matrix
 210     virtual void Scale( wxDouble xScale , wxDouble yScale );
 211
 212     // add the rotation to this matrix (radians)
 213     virtual void Rotate( wxDouble angle );
 214
 215     //
 216     // apply the transforms
 217     //
 218
 219     // applies that matrix to the point
 220     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 221
 222     // applies the matrix except for translations
 223     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 224
 225     // returns the native representation
 226     virtual void * GetNativeMatrix() const;
 227 private:
 228     cairo_matrix_t m_matrix ;
 229 } ;
 230
 231 class WXDLLIMPEXP_CORE wxCairoPenData : public wxGraphicsObjectRefData
 232 {
 233 public:
 234     wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 235     ~wxCairoPenData();
 236
 237     void Init();
 238
 239     virtual void Apply( wxGraphicsContext* context );
 240     virtual wxDouble GetWidth() { return m_width; }
 241
 242 private :
 243     double m_width;
 244
 245     double m_red;
 246     double m_green;
 247     double m_blue;
 248     double m_alpha;
 249
 250     cairo_line_cap_t m_cap;
 251     cairo_line_join_t m_join;
 252
 253     int m_count;
 254     const double *m_lengths;
 255     double *m_userLengths;
 256
 257     wxPen m_pen;
 258 };
 259
 260 class WXDLLIMPEXP_CORE wxCairoBrushData : public wxGraphicsObjectRefData
 261 {
 262 public:
 263     wxCairoBrushData( wxGraphicsRenderer* renderer );
 264     wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 265     ~wxCairoBrushData ();
 266
 267     virtual void Apply( wxGraphicsContext* context );
 268     void CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 269         const wxColour&c1, const wxColour&c2 );
 270     void CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 271         const wxColour &oColor, const wxColour &cColor );
 272
 273 protected:
 274     virtual void Init();
 275
 276 private :
 277     double m_red;
 278     double m_green;
 279     double m_blue;
 280     double m_alpha;
 281
 282     cairo_pattern_t* m_brushPattern;
 283 };
 284
 285 class wxCairoFontData : public wxGraphicsObjectRefData
 286 {
 287 public:
 288     wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col );
 289     ~wxCairoFontData();
 290
 291     virtual void Apply( wxGraphicsContext* context );
 292 #ifdef __WXGTK__
 293     const PangoFontDescription* GetFont() const { return m_font; }
 294     bool GetUnderlined() const { return m_underlined; }
 295 #endif
 296 private :
 297     double m_size;
 298     bool m_underlined;
 299     double m_red;
 300     double m_green;
 301     double m_blue;
 302     double m_alpha;
 303 #ifdef __WXMAC__
 304     cairo_font_face_t *m_font;
 305 #elif defined(__WXGTK__)
 306     PangoFontDescription* m_font;
 307 #else
 308     wxCharBuffer m_fontName;
 309     cairo_font_slant_t m_slant;
 310     cairo_font_weight_t m_weight;
 311 #endif
 312 };
 313
 314 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
 315 {
 316 public:
 317     wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc );
 318     wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc );
 319     wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc );
 320 #ifdef __WXGTK__
 321     wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable );
 322 #endif
 323     wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context );
 324     wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window);
 325     wxCairoContext();
 326     virtual ~wxCairoContext();
 327
 328     virtual bool ShouldOffset() const
 329     {
 330         int penwidth = 0 ;
 331         if ( !m_pen.IsNull() )
 332         {
 333             penwidth = (int)((wxCairoPenData*)m_pen.GetRefData())->GetWidth();
 334             if ( penwidth == 0 )
 335                 penwidth = 1;
 336         }
 337         return ( penwidth % 2 ) == 1;
 338     }
 339
 340     virtual void Clip( const wxRegion &region );
 341
 342     // clips drawings to the rect
 343     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 344
 345     // resets the clipping to original extent
 346     virtual void ResetClip();
 347
 348     virtual void * GetNativeContext();
 349
 350     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
 351
 352     virtual bool SetCompositionMode(wxCompositionMode op);
 353
 354     virtual void BeginLayer(wxDouble opacity);
 355
 356     virtual void EndLayer();
 357
 358     virtual void StrokePath( const wxGraphicsPath& p );
 359     virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxWINDING_RULE );
 360
 361     virtual void Translate( wxDouble dx , wxDouble dy );
 362     virtual void Scale( wxDouble xScale , wxDouble yScale );
 363     virtual void Rotate( wxDouble angle );
 364
 365     // concatenates this transform with the current transform of this context
 366     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 367
 368     // sets the transform of this context
 369     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 370
 371     // gets the matrix of this context
 372     virtual wxGraphicsMatrix GetTransform() const;
 373
 374     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 375     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 376     virtual void PushState();
 377     virtual void PopState();
 378
 379     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 380                                 wxDouble *descent, wxDouble *externalLeading ) const;
 381     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 382
 383 private:
 384     void Init(cairo_t *context);
 385
 386     virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
 387
 388     cairo_t* m_context;
 389
 390     wxVector<float> m_layerOpacities;
 391
 392     wxDECLARE_NO_COPY_CLASS(wxCairoContext);
 393 };
 394
 395 //-----------------------------------------------------------------------------
 396 // wxCairoPenData implementation
 397 //-----------------------------------------------------------------------------
 398
 399 wxCairoPenData::~wxCairoPenData()
 400 {
 401     delete[] m_userLengths;
 402 }
 403
 404 void wxCairoPenData::Init()
 405 {
 406     m_lengths = NULL;
 407     m_userLengths = NULL;
 408     m_width = 0;
 409     m_count = 0;
 410 }
 411
 412 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 413 : wxGraphicsObjectRefData(renderer)
 414 {
 415     Init();
 416     m_pen = pen;
 417     m_width = m_pen.GetWidth();
 418     if (m_width <= 0.0)
 419         m_width = 0.1;
 420
 421     m_red = m_pen.GetColour().Red()/255.0;
 422     m_green = m_pen.GetColour().Green()/255.0;
 423     m_blue = m_pen.GetColour().Blue()/255.0;
 424     m_alpha = m_pen.GetColour().Alpha()/255.0;
 425
 426     switch ( m_pen.GetCap() )
 427     {
 428     case wxCAP_ROUND :
 429         m_cap = CAIRO_LINE_CAP_ROUND;
 430         break;
 431
 432     case wxCAP_PROJECTING :
 433         m_cap = CAIRO_LINE_CAP_SQUARE;
 434         break;
 435
 436     case wxCAP_BUTT :
 437         m_cap = CAIRO_LINE_CAP_BUTT;
 438         break;
 439
 440     default :
 441         m_cap = CAIRO_LINE_CAP_BUTT;
 442         break;
 443     }
 444
 445     switch ( m_pen.GetJoin() )
 446     {
 447     case wxJOIN_BEVEL :
 448         m_join = CAIRO_LINE_JOIN_BEVEL;
 449         break;
 450
 451     case wxJOIN_MITER :
 452         m_join = CAIRO_LINE_JOIN_MITER;
 453         break;
 454
 455     case wxJOIN_ROUND :
 456         m_join = CAIRO_LINE_JOIN_ROUND;
 457         break;
 458
 459     default :
 460         m_join = CAIRO_LINE_JOIN_MITER;
 461         break;
 462     }
 463
 464     const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
 465     const double dotted[] =
 466     {
 467         dashUnit , dashUnit + 2.0
 468     };
 469     static const double short_dashed[] =
 470     {
 471         9.0 , 6.0
 472     };
 473     static const double dashed[] =
 474     {
 475         19.0 , 9.0
 476     };
 477     static const double dotted_dashed[] =
 478     {
 479         9.0 , 6.0 , 3.0 , 3.0
 480     };
 481
 482     switch ( m_pen.GetStyle() )
 483     {
 484     case wxPENSTYLE_SOLID :
 485         break;
 486
 487     case wxPENSTYLE_DOT :
 488         m_count = WXSIZEOF(dotted);
 489         m_userLengths = new double[ m_count ] ;
 490         memcpy( m_userLengths, dotted, sizeof(dotted) );
 491         m_lengths = m_userLengths;
 492         break;
 493
 494     case wxPENSTYLE_LONG_DASH :
 495         m_lengths = dashed ;
 496         m_count = WXSIZEOF(dashed);
 497         break;
 498
 499     case wxPENSTYLE_SHORT_DASH :
 500         m_lengths = short_dashed ;
 501         m_count = WXSIZEOF(short_dashed);
 502         break;
 503
 504     case wxPENSTYLE_DOT_DASH :
 505         m_lengths = dotted_dashed ;
 506         m_count = WXSIZEOF(dotted_dashed);
 507         break;
 508
 509     case wxPENSTYLE_USER_DASH :
 510         {
 511             wxDash *wxdashes ;
 512             m_count = m_pen.GetDashes( &wxdashes ) ;
 513             if ((wxdashes != NULL) && (m_count > 0))
 514             {
 515                 m_userLengths = new double[m_count] ;
 516                 for ( int i = 0 ; i < m_count ; ++i )
 517                 {
 518                     m_userLengths[i] = wxdashes[i] * dashUnit ;
 519
 520                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 521                         m_userLengths[i] = dashUnit + 2.0 ;
 522                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 523                         m_userLengths[i] = dashUnit ;
 524                 }
 525             }
 526             m_lengths = m_userLengths ;
 527         }
 528         break;
 529     case wxPENSTYLE_STIPPLE :
 530         {
 531             /*
 532             wxBitmap* bmp = pen.GetStipple();
 533             if ( bmp && bmp->Ok() )
 534             {
 535             wxDELETE( m_penImage );
 536             wxDELETE( m_penBrush );
 537             m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 538             m_penBrush = new TextureBrush(m_penImage);
 539             m_pen->SetBrush( m_penBrush );
 540             }
 541             */
 542         }
 543         break;
 544     default :
 545         if ( m_pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH
 546             && m_pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
 547         {
 548             /*
 549             wxDELETE( m_penBrush );
 550             HatchStyle style = HatchStyleHorizontal;
 551             switch( pen.GetStyle() )
 552             {
 553             case wxPENSTYLE_BDIAGONAL_HATCH :
 554             style = HatchStyleBackwardDiagonal;
 555             break ;
 556             case wxPENSTYLE_CROSSDIAG_HATCH :
 557             style = HatchStyleDiagonalCross;
 558             break ;
 559             case wxPENSTYLE_FDIAGONAL_HATCH :
 560             style = HatchStyleForwardDiagonal;
 561             break ;
 562             case wxPENSTYLE_CROSS_HATCH :
 563             style = HatchStyleCross;
 564             break ;
 565             case wxPENSTYLE_HORIZONTAL_HATCH :
 566             style = HatchStyleHorizontal;
 567             break ;
 568             case wxPENSTYLE_VERTICAL_HATCH :
 569             style = HatchStyleVertical;
 570             break ;
 571
 572             }
 573             m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
 574             pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
 575             m_pen->SetBrush( m_penBrush )
 576             */
 577         }
 578         break;
 579     }
 580 }
 581
 582 void wxCairoPenData::Apply( wxGraphicsContext* context )
 583 {
 584     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 585     cairo_set_line_width(ctext,m_width);
 586     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 587     cairo_set_line_cap(ctext,m_cap);
 588     cairo_set_line_join(ctext,m_join);
 589     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 590 }
 591
 592 //-----------------------------------------------------------------------------
 593 // wxCairoBrushData implementation
 594 //-----------------------------------------------------------------------------
 595
 596 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 597   : wxGraphicsObjectRefData( renderer )
 598 {
 599     Init();
 600 }
 601
 602 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
 603   : wxGraphicsObjectRefData(renderer)
 604 {
 605     Init();
 606
 607     m_red = brush.GetColour().Red()/255.0;
 608     m_green = brush.GetColour().Green()/255.0;
 609     m_blue = brush.GetColour().Blue()/255.0;
 610     m_alpha = brush.GetColour().Alpha()/255.0;
 611     /*
 612     if ( brush.GetStyle() == wxBRUSHSTYLE_SOLID)
 613     {
 614     m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 615     brush.GetColour().Green() , brush.GetColour().Blue() ) );
 616     }
 617     else if ( brush.IsHatch() )
 618     {
 619     HatchStyle style = HatchStyleHorizontal;
 620     switch( brush.GetStyle() )
 621     {
 622     case wxBRUSHSTYLE_BDIAGONAL_HATCH :
 623     style = HatchStyleBackwardDiagonal;
 624     break ;
 625     case wxBRUSHSTYLE_CROSSDIAG_HATCH :
 626     style = HatchStyleDiagonalCross;
 627     break ;
 628     case wxBRUSHSTYLE_FDIAGONAL_HATCH :
 629     style = HatchStyleForwardDiagonal;
 630     break ;
 631     case wxBRUSHSTYLE_CROSS_HATCH :
 632     style = HatchStyleCross;
 633     break ;
 634     case wxBRUSHSTYLE_HORIZONTAL_HATCH :
 635     style = HatchStyleHorizontal;
 636     break ;
 637     case wxBRUSHSTYLE_VERTICAL_HATCH :
 638     style = HatchStyleVertical;
 639     break ;
 640
 641     }
 642     m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
 643     brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
 644     }
 645     else
 646     {
 647     wxBitmap* bmp = brush.GetStipple();
 648     if ( bmp && bmp->Ok() )
 649     {
 650     wxDELETE( m_brushImage );
 651     m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
 652     m_brush = new TextureBrush(m_brushImage);
 653     }
 654     }
 655     */
 656 }
 657
 658 wxCairoBrushData::~wxCairoBrushData ()
 659 {
 660     if (m_brushPattern)
 661         cairo_pattern_destroy(m_brushPattern);
 662 }
 663
 664 void wxCairoBrushData::Apply( wxGraphicsContext* context )
 665 {
 666     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 667     if ( m_brushPattern )
 668     {
 669         cairo_set_source(ctext,m_brushPattern);
 670     }
 671     else
 672     {
 673         cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 674     }
 675 }
 676
 677 void wxCairoBrushData::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 678         const wxColour&c1, const wxColour&c2 )
 679 {
 680     m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 681     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,c1.Red()/255.0,
 682         c1.Green()/255.0, c1.Blue()/255.0,c1.Alpha()/255.0);
 683     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,c2.Red()/255.0,
 684         c2.Green()/255.0, c2.Blue()/255.0,c2.Alpha()/255.0);
 685     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 686 }
 687
 688 void wxCairoBrushData::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 689         const wxColour &oColor, const wxColour &cColor )
 690 {
 691     m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 692     cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,oColor.Red()/255.0,
 693         oColor.Green()/255.0, oColor.Blue()/255.0,oColor.Alpha()/255.0);
 694     cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,cColor.Red()/255.0,
 695         cColor.Green()/255.0, cColor.Blue()/255.0,cColor.Alpha()/255.0);
 696     wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
 697 }
 698
 699 void wxCairoBrushData::Init()
 700 {
 701     m_brushPattern = NULL;
 702 }
 703
 704 //-----------------------------------------------------------------------------
 705 // wxCairoFontData implementation
 706 //-----------------------------------------------------------------------------
 707
 708 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 709                          const wxColour& col ) : wxGraphicsObjectRefData(renderer)
 710 {
 711     m_red = col.Red()/255.0;
 712     m_green = col.Green()/255.0;
 713     m_blue = col.Blue()/255.0;
 714     m_alpha = col.Alpha()/255.0;
 715     m_size = font.GetPointSize();
 716     m_underlined = font.GetUnderlined();
 717
 718 #ifdef __WXMAC__
 719     m_font = cairo_atsui_font_face_create_for_atsu_font_id( font.MacGetATSUFontID() );
 720 #elif defined(__WXGTK__)
 721     m_font = pango_font_description_copy( font.GetNativeFontInfo()->description );
 722 #else
 723     m_fontName = font.GetFaceName().mb_str(wxConvUTF8);
 724     m_slant = font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL;
 725     m_weight = font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL;
 726 #endif
 727 }
 728
 729 wxCairoFontData::~wxCairoFontData()
 730 {
 731 #ifdef __WXMAC__
 732     cairo_font_face_destroy( m_font );
 733 #elif defined(__WXGTK__)
 734     pango_font_description_free( m_font );
 735 #else
 736 #endif
 737 }
 738
 739 void wxCairoFontData::Apply( wxGraphicsContext* context )
 740 {
 741     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 742     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 743 #ifdef __WXGTK__
 744     // the rest is done using Pango layouts
 745 #elif defined(__WXMAC__)
 746     cairo_set_font_face(ctext, m_font);
 747     cairo_set_font_size(ctext, m_size );
 748 #else
 749     cairo_select_font_face(ctext, m_fontName, m_slant, m_weights );
 750     cairo_set_font_size(ctext, m_size );
 751 #endif
 752 }
 753
 754 //-----------------------------------------------------------------------------
 755 // wxCairoPathData implementation
 756 //-----------------------------------------------------------------------------
 757
 758 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
 759     : wxGraphicsPathData(renderer)
 760 {
 761     if (pathcontext)
 762     {
 763         m_pathContext = pathcontext;
 764     }
 765     else
 766     {
 767         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 768         m_pathContext = cairo_create(surface);
 769         cairo_surface_destroy (surface);
 770     }
 771 }
 772
 773 wxCairoPathData::~wxCairoPathData()
 774 {
 775     cairo_destroy(m_pathContext);
 776 }
 777
 778 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
 779 {
 780     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
 781     cairo_t* pathcontext = cairo_create(surface);
 782     cairo_surface_destroy (surface);
 783
 784     cairo_path_t* path = cairo_copy_path(m_pathContext);
 785     cairo_append_path(pathcontext, path);
 786     cairo_path_destroy(path);
 787     return new wxCairoPathData( GetRenderer() ,pathcontext);
 788 }
 789
 790
 791 void* wxCairoPathData::GetNativePath() const
 792 {
 793     return cairo_copy_path(m_pathContext) ;
 794 }
 795
 796 void wxCairoPathData::UnGetNativePath(void *p) const
 797 {
 798     cairo_path_destroy((cairo_path_t*)p);
 799 }
 800
 801 //
 802 // The Primitives
 803 //
 804
 805 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
 806 {
 807     cairo_move_to(m_pathContext,x,y);
 808 }
 809
 810 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
 811 {
 812     cairo_line_to(m_pathContext,x,y);
 813 }
 814
 815 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
 816 {
 817     cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
 818     cairo_append_path(m_pathContext, p);
 819     UnGetNativePath(p);
 820 }
 821
 822 void wxCairoPathData::CloseSubpath()
 823 {
 824     cairo_close_path(m_pathContext);
 825 }
 826
 827 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
 828 {
 829     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
 830 }
 831
 832 // gets the last point of the current path, (0,0) if not yet set
 833 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
 834 {
 835     double dx,dy;
 836     cairo_get_current_point(m_pathContext,&dx,&dy);
 837     if (x)
 838         *x = dx;
 839     if (y)
 840         *y = dy;
 841 }
 842
 843 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
 844 {
 845     // as clockwise means positive in our system (y pointing downwards)
 846     // TODO make this interpretation dependent of the
 847     // real device trans
 848     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
 849         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
 850     else
 851         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
 852 }
 853
 854 // transforms each point of this path by the matrix
 855 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
 856 {
 857     // as we don't have a true path object, we have to apply the inverse
 858     // matrix to the context
 859     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
 860     cairo_matrix_invert( &m );
 861     cairo_transform(m_pathContext,&m);
 862 }
 863
 864 // gets the bounding box enclosing all points (possibly including control points)
 865 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
 866 {
 867     double x1,y1,x2,y2;
 868
 869     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
 870     if ( x2 < x1 )
 871     {
 872         *x = x2;
 873         *w = x1-x2;
 874     }
 875     else
 876     {
 877         *x = x1;
 878         *w = x2-x1;
 879     }
 880
 881     if( y2 < y1 )
 882     {
 883         *y = y2;
 884         *h = y1-y2;
 885     }
 886     else
 887     {
 888         *y = y1;
 889         *h = y2-y1;
 890     }
 891 }
 892
 893 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode WXUNUSED(fillStyle) ) const
 894 {
 895     return cairo_in_stroke( m_pathContext, x, y) != 0;
 896 }
 897
 898 //-----------------------------------------------------------------------------
 899 // wxCairoMatrixData implementation
 900 //-----------------------------------------------------------------------------
 901
 902 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
 903     : wxGraphicsMatrixData(renderer)
 904 {
 905     if ( matrix )
 906         m_matrix = *matrix;
 907 }
 908
 909 wxCairoMatrixData::~wxCairoMatrixData()
 910 {
 911     // nothing to do
 912 }
 913
 914 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
 915 {
 916     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
 917 }
 918
 919 // concatenates the matrix
 920 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
 921 {
 922     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
 923 }
 924
 925 // sets the matrix to the respective values
 926 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
 927                         wxDouble tx, wxDouble ty)
 928 {
 929     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
 930 }
 931
 932 // gets the component valuess of the matrix
 933 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
 934                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
 935 {
 936     if (a)  *a = m_matrix.xx;
 937     if (b)  *b = m_matrix.yx;
 938     if (c)  *c = m_matrix.xy;
 939     if (d)  *d = m_matrix.yy;
 940     if (tx) *tx= m_matrix.x0;
 941     if (ty) *ty= m_matrix.y0;
 942 }
 943
 944 // makes this the inverse matrix
 945 void wxCairoMatrixData::Invert()
 946 {
 947     cairo_matrix_invert( &m_matrix );
 948 }
 949
 950 // returns true if the elements of the transformation matrix are equal ?
 951 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
 952 {
 953     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
 954     return (
 955         m_matrix.xx == tm->xx &&
 956         m_matrix.yx == tm->yx &&
 957         m_matrix.xy == tm->xy &&
 958         m_matrix.yy == tm->yy &&
 959         m_matrix.x0 == tm->x0 &&
 960         m_matrix.y0 == tm->y0 ) ;
 961 }
 962
 963 // return true if this is the identity matrix
 964 bool wxCairoMatrixData::IsIdentity() const
 965 {
 966     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
 967         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
 968 }
 969
 970 //
 971 // transformation
 972 //
 973
 974 // add the translation to this matrix
 975 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
 976 {
 977     cairo_matrix_translate( &m_matrix, dx, dy) ;
 978 }
 979
 980 // add the scale to this matrix
 981 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
 982 {
 983     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
 984 }
 985
 986 // add the rotation to this matrix (radians)
 987 void wxCairoMatrixData::Rotate( wxDouble angle )
 988 {
 989     cairo_matrix_rotate( &m_matrix, angle) ;
 990 }
 991
 992 //
 993 // apply the transforms
 994 //
 995
 996 // applies that matrix to the point
 997 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
 998 {
 999     double lx = *x, ly = *y ;
1000     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
1001     *x = lx;
1002     *y = ly;
1003 }
1004
1005 // applies the matrix except for translations
1006 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1007 {
1008     double lx = *dx, ly = *dy ;
1009     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1010     *dx = lx;
1011     *dy = ly;
1012 }
1013
1014 // returns the native representation
1015 void * wxCairoMatrixData::GetNativeMatrix() const
1016 {
1017     return (void*) &m_matrix;
1018 }
1019
1020 //-----------------------------------------------------------------------------
1021 // wxCairoContext implementation
1022 //-----------------------------------------------------------------------------
1023
1024 class wxCairoOffsetHelper
1025 {
1026 public :
1027     wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1028     {
1029         m_ctx = ctx;
1030         m_offset = offset;
1031         if ( m_offset )
1032              cairo_translate( m_ctx, 0.5, 0.5 );
1033     }
1034     ~wxCairoOffsetHelper( )
1035     {
1036         if ( m_offset )
1037             cairo_translate( m_ctx, -0.5, -0.5 );
1038     }
1039 public :
1040     cairo_t* m_ctx;
1041     bool m_offset;
1042 } ;
1043
1044 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1045 : wxGraphicsContext(renderer)
1046 {
1047 #ifdef __WXGTK20__
1048     const wxDCImpl *impl = dc.GetImpl();
1049     Init( (cairo_t*) impl->GetCairoContext() );
1050
1051     wxPoint org = dc.GetDeviceOrigin();
1052     cairo_translate( m_context, org.x, org.y );
1053
1054     double sx,sy;
1055     dc.GetUserScale( &sx, &sy );
1056     cairo_scale( m_context, sx, sy );
1057
1058     org = dc.GetLogicalOrigin();
1059     cairo_translate( m_context, -org.x, -org.y );
1060 #endif
1061 }
1062
1063 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1064 : wxGraphicsContext(renderer)
1065 {
1066 #ifdef __WXGTK20__
1067     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1068     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1069
1070 #if 0
1071     wxGraphicsMatrix matrix = CreateMatrix();
1072
1073     wxPoint org = dc.GetDeviceOrigin();
1074     matrix.Translate( org.x, org.y );
1075
1076     org = dc.GetLogicalOrigin();
1077     matrix.Translate( -org.x, -org.y );
1078
1079     double sx,sy;
1080     dc.GetUserScale( &sx, &sy );
1081     matrix.Scale( sx, sy );
1082
1083     ConcatTransform( matrix );
1084 #endif
1085 #endif
1086
1087 #ifdef __WXMAC__
1088     int width, height;
1089     dc.GetSize( &width, &height );
1090     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1091     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1092     Init( cairo_create( surface ) );
1093     cairo_surface_destroy( surface );
1094 #endif
1095 }
1096
1097 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1098 : wxGraphicsContext(renderer)
1099 {
1100 #ifdef __WXGTK20__
1101     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1102     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1103
1104 #if 0
1105     wxGraphicsMatrix matrix = CreateMatrix();
1106
1107     wxPoint org = dc.GetDeviceOrigin();
1108     matrix.Translate( org.x, org.y );
1109
1110     org = dc.GetLogicalOrigin();
1111     matrix.Translate( -org.x, -org.y );
1112
1113     double sx,sy;
1114     dc.GetUserScale( &sx, &sy );
1115     matrix.Scale( sx, sy );
1116
1117     ConcatTransform( matrix );
1118 #endif
1119 #endif
1120
1121 #ifdef __WXMAC__
1122     int width, height;
1123     dc.GetSize( &width, &height );
1124     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1125     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1126     Init( cairo_create( surface ) );
1127     cairo_surface_destroy( surface );
1128 #endif
1129 }
1130
1131 #ifdef __WXGTK20__
1132 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
1133 : wxGraphicsContext(renderer)
1134 {
1135     Init( gdk_cairo_create( drawable ) );
1136 }
1137 #endif
1138
1139 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1140 : wxGraphicsContext(renderer)
1141 {
1142     Init( context );
1143 }
1144
1145 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1146 : wxGraphicsContext(renderer)
1147 {
1148 #ifdef __WXGTK__
1149     // something along these lines (copied from dcclient)
1150
1151     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1152     // code should still be able to create wxClientDCs for them, so we will
1153     // use the parent window here then.
1154     if (window->m_wxwindow == NULL)
1155     {
1156         window = window->GetParent();
1157     }
1158
1159     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1160
1161     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1162 #endif
1163 }
1164
1165 wxCairoContext::~wxCairoContext()
1166 {
1167     if ( m_context )
1168     {
1169         PopState();
1170         PopState();
1171         cairo_destroy(m_context);
1172     }
1173 }
1174
1175 void wxCairoContext::Init(cairo_t *context)
1176 {
1177     m_context = context ;
1178     PushState();
1179     PushState();
1180 }
1181
1182
1183 void wxCairoContext::Clip( const wxRegion& region )
1184 {
1185     // Create a path with all the rectangles in the region
1186     wxGraphicsPath path = GetRenderer()->CreatePath();
1187     wxRegionIterator ri(region);
1188     while (ri)
1189     {
1190         path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1191         ++ri;
1192     }
1193
1194     // Put it in the context
1195     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1196     cairo_append_path(m_context, cp);
1197
1198     // clip to that path
1199     cairo_clip(m_context);
1200     path.UnGetNativePath(cp);
1201 }
1202
1203 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1204 {
1205     // Create a path with this rectangle
1206     wxGraphicsPath path = GetRenderer()->CreatePath();
1207     path.AddRectangle(x,y,w,h);
1208
1209     // Put it in the context
1210     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1211     cairo_append_path(m_context, cp);
1212
1213     // clip to that path
1214     cairo_clip(m_context);
1215     path.UnGetNativePath(cp);
1216 }
1217
1218 void wxCairoContext::ResetClip()
1219 {
1220     cairo_reset_clip(m_context);
1221 }
1222
1223
1224 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1225 {
1226     if ( !m_pen.IsNull() )
1227     {
1228         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1229         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1230         cairo_append_path(m_context,cp);
1231         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1232         cairo_stroke(m_context);
1233         path.UnGetNativePath(cp);
1234     }
1235 }
1236
1237 void wxCairoContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1238 {
1239     if ( !m_brush.IsNull() )
1240     {
1241         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1242         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1243         cairo_append_path(m_context,cp);
1244         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1245         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1246         cairo_fill(m_context);
1247         path.UnGetNativePath(cp);
1248     }
1249 }
1250
1251 void wxCairoContext::Rotate( wxDouble angle )
1252 {
1253     cairo_rotate(m_context,angle);
1254 }
1255
1256 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1257 {
1258     cairo_translate(m_context,dx,dy);
1259 }
1260
1261 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1262 {
1263     cairo_scale(m_context,xScale,yScale);
1264 }
1265
1266 // concatenates this transform with the current transform of this context
1267 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1268 {
1269     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1270 }
1271
1272 // sets the transform of this context
1273 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1274 {
1275     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1276 }
1277
1278 // gets the matrix of this context
1279 wxGraphicsMatrix wxCairoContext::GetTransform() const
1280 {
1281     wxGraphicsMatrix matrix = CreateMatrix();
1282     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1283     return matrix;
1284 }
1285
1286
1287
1288 void wxCairoContext::PushState()
1289 {
1290     cairo_save(m_context);
1291 }
1292
1293 void wxCairoContext::PopState()
1294 {
1295     cairo_restore(m_context);
1296 }
1297
1298 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1299 {
1300     wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1301
1302     cairo_surface_t* surface;
1303     int bw = bmp.GetWidth();
1304     int bh = bmp.GetHeight();
1305     wxBitmap bmpSource = bmp;  // we need a non-const instance
1306     unsigned char* buffer = new unsigned char[bw*bh*4];
1307     wxUint32* data = (wxUint32*)buffer;
1308
1309     // Create a surface object and copy the bitmap pixel data to it.  if the
1310     // image has alpha (or a mask represented as alpha) then we'll use a
1311     // different format and iterator than if it doesn't...
1312     if (bmpSource.HasAlpha() || bmpSource.GetMask())
1313     {
1314         surface = cairo_image_surface_create_for_data(
1315             buffer, CAIRO_FORMAT_ARGB32, bw, bh, bw*4);
1316         wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1317         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1318
1319         wxAlphaPixelData::Iterator p(pixData);
1320         for (int y=0; y<bh; y++)
1321         {
1322             wxAlphaPixelData::Iterator rowStart = p;
1323             for (int x=0; x<bw; x++)
1324             {
1325                 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1326                 // with alpha in the upper 8 bits, then red, then green, then
1327                 // blue. The 32-bit quantities are stored native-endian.
1328                 // Pre-multiplied alpha is used.
1329                 unsigned char alpha = p.Alpha();
1330                 if (alpha == 0)
1331                     *data = 0;
1332                 else
1333                     *data = ( alpha                      << 24
1334                               | (p.Red() * alpha/255)    << 16
1335                               | (p.Green() * alpha/255)  <<  8
1336                               | (p.Blue() * alpha/255) );
1337                 ++data;
1338                 ++p;
1339             }
1340             p = rowStart;
1341             p.OffsetY(pixData, 1);
1342         }
1343     }
1344     else  // no alpha
1345     {
1346         surface = cairo_image_surface_create_for_data(
1347             buffer, CAIRO_FORMAT_RGB24, bw, bh, bw*4);
1348         wxNativePixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1349         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1350
1351         wxNativePixelData::Iterator p(pixData);
1352         for (int y=0; y<bh; y++)
1353         {
1354             wxNativePixelData::Iterator rowStart = p;
1355             for (int x=0; x<bw; x++)
1356             {
1357                 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1358                 // the upper 8 bits unused. Red, Green, and Blue are stored in
1359                 // the remaining 24 bits in that order.  The 32-bit quantities
1360                 // are stored native-endian.
1361                 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1362                 ++data;
1363                 ++p;
1364             }
1365             p = rowStart;
1366             p.OffsetY(pixData, 1);
1367         }
1368     }
1369
1370
1371     PushState();
1372
1373     // In case we're scaling the image by using a width and height different
1374     // than the bitmap's size create a pattern transformation on the surface and
1375     // draw the transformed pattern.
1376     cairo_pattern_t* pattern = cairo_pattern_create_for_surface(surface);
1377     wxDouble scaleX = w / bw;
1378     wxDouble scaleY = h / bh;
1379     cairo_scale(m_context, scaleX, scaleY);
1380
1381     // prepare to draw the image
1382     cairo_translate(m_context, x, y);
1383     cairo_set_source(m_context, pattern);
1384     // use the original size here since the context is scaled already...
1385     cairo_rectangle(m_context, 0, 0, bw, bh);
1386     // fill the rectangle using the pattern
1387     cairo_fill(m_context);
1388
1389     // clean up
1390     cairo_pattern_destroy(pattern);
1391     cairo_surface_destroy(surface);
1392     delete [] buffer;
1393     PopState();
1394 }
1395
1396 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1397 {
1398     // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
1399     // start using the Cairo backend on other platforms then we may need to
1400     // fiddle with this...
1401     DrawBitmap(icon, x, y, w, h);
1402 }
1403
1404
1405 void wxCairoContext::DoDrawText(const wxString& str, wxDouble x, wxDouble y)
1406 {
1407     wxCHECK_RET( !m_font.IsNull(),
1408                  wxT("wxCairoContext::DrawText - no valid font set") );
1409
1410     if ( str.empty())
1411         return;
1412
1413     const wxCharBuffer data = str.utf8_str();
1414     if ( !data )
1415         return;
1416
1417     ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
1418
1419 #ifdef __WXGTK__
1420     size_t datalen = strlen(data);
1421
1422     PangoLayout *layout = pango_cairo_create_layout (m_context);
1423     wxCairoFontData* font_data = (wxCairoFontData*) m_font.GetRefData();
1424     pango_layout_set_font_description( layout, font_data->GetFont());
1425     pango_layout_set_text(layout, data, datalen);
1426
1427     if (font_data->GetUnderlined())
1428     {
1429         PangoAttrList *attrs = pango_attr_list_new();
1430         PangoAttribute *attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
1431         pango_attr_list_insert(attrs, attr);
1432         pango_layout_set_attributes(layout, attrs);
1433         pango_attr_list_unref(attrs);
1434     }
1435
1436     cairo_move_to(m_context, x, y);
1437     pango_cairo_show_layout (m_context, layout);
1438
1439     g_object_unref (layout);
1440 #else
1441     // Cairo's x,y for drawing text is at the baseline, so we need to adjust
1442     // the position we move to by the ascent.
1443     cairo_font_extents_t fe;
1444     cairo_font_extents(m_context, &fe);
1445     cairo_move_to(m_context, x, y+fe.ascent);
1446
1447     cairo_show_text(m_context, data);
1448 #endif
1449 }
1450
1451 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1452                                     wxDouble *descent, wxDouble *externalLeading ) const
1453 {
1454     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
1455
1456     if ( width )
1457         *width = 0;
1458     if ( height )
1459         *height = 0;
1460     if ( descent )
1461         *descent = 0;
1462     if ( externalLeading )
1463         *externalLeading = 0;
1464
1465     if ( str.empty())
1466         return;
1467
1468 #ifdef __WXGTK__
1469     int w, h;
1470
1471     PangoLayout *layout = pango_cairo_create_layout (m_context);
1472     pango_layout_set_font_description( layout, ((wxCairoFontData*)m_font.GetRefData())->GetFont());
1473     const wxCharBuffer data = str.utf8_str();
1474     if ( !data )
1475     {
1476         return;
1477     }
1478     pango_layout_set_text( layout, data, strlen(data) );
1479     pango_layout_get_pixel_size (layout, &w, &h);
1480     if ( width )
1481         *width = w;
1482     if ( height )
1483         *height = h;
1484     if (descent)
1485     {
1486         PangoLayoutIter *iter = pango_layout_get_iter(layout);
1487         int baseline = pango_layout_iter_get_baseline(iter);
1488         pango_layout_iter_free(iter);
1489         *descent = h - PANGO_PIXELS(baseline);
1490     }
1491     g_object_unref (layout);
1492 #else
1493     ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this);
1494
1495     if (width)
1496     {
1497         const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
1498         cairo_text_extents_t te;
1499         cairo_text_extents(m_context, buf, &te);
1500         *width = te.width;
1501     }
1502
1503     if (height || descent || externalLeading)
1504     {
1505         cairo_font_extents_t fe;
1506         cairo_font_extents(m_context, &fe);
1507
1508         // some backends have negative descents
1509
1510         if ( fe.descent < 0 )
1511             fe.descent = -fe.descent;
1512
1513         if ( fe.height < (fe.ascent + fe.descent ) )
1514         {
1515             // some backends are broken re height ... (eg currently ATSUI)
1516             fe.height = fe.ascent + fe.descent;
1517         }
1518
1519         if (height)
1520             *height = fe.height;
1521         if ( descent )
1522             *descent = fe.descent;
1523         if ( externalLeading )
1524             *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
1525     }
1526 #endif
1527 }
1528
1529 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
1530 {
1531     widths.Empty();
1532     widths.Add(0, text.length());
1533
1534     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
1535
1536     if (text.empty())
1537         return;
1538
1539     // TODO
1540 }
1541
1542 void * wxCairoContext::GetNativeContext()
1543 {
1544     return m_context;
1545 }
1546
1547 bool wxCairoContext::SetAntialiasMode(wxAntialiasMode antialias)
1548 {
1549     if (m_antialias == antialias)
1550         return true;
1551
1552     m_antialias = antialias;
1553
1554     cairo_antialias_t antialiasMode;
1555     switch (antialias)
1556     {
1557         case wxANTIALIAS_DEFAULT:
1558             antialiasMode = CAIRO_ANTIALIAS_DEFAULT;
1559             break;
1560         case wxANTIALIAS_NONE:
1561             antialiasMode = CAIRO_ANTIALIAS_NONE;
1562             break;
1563         default:
1564             return false;
1565     }
1566     cairo_set_antialias(m_context, antialiasMode);
1567     return true;
1568 }
1569
1570 bool wxCairoContext::SetCompositionMode(wxCompositionMode op)
1571 {
1572     if ( m_composition == op )
1573         return true;
1574
1575     m_composition = op;
1576     cairo_operator_t cop;
1577     switch (op)
1578     {
1579         case wxCOMPOSITION__CLEAR:
1580             cop = CAIRO_OPERATOR_CLEAR;
1581             break;
1582         case wxCOMPOSITION_SOURCE:
1583             cop = CAIRO_OPERATOR_SOURCE;
1584             break;
1585         case wxCOMPOSITION_OVER:
1586             cop = CAIRO_OPERATOR_OVER;
1587             break;
1588         case wxCOMPOSITION_IN:
1589             cop = CAIRO_OPERATOR_IN;
1590             break;
1591         case wxCOMPOSITION_OUT:
1592             cop = CAIRO_OPERATOR_OUT;
1593             break;
1594         case wxCOMPOSITION_ATOP:
1595             cop = CAIRO_OPERATOR_ATOP;
1596             break;
1597         case wxCOMPOSITION_DEST:
1598             cop = CAIRO_OPERATOR_DEST;
1599             break;
1600         case wxCOMPOSITION_DEST_OVER:
1601             cop = CAIRO_OPERATOR_DEST_OVER;
1602             break;
1603         case wxCOMPOSITION_DEST_IN:
1604             cop = CAIRO_OPERATOR_DEST_IN;
1605             break;
1606         case wxCOMPOSITION_DEST_OUT:
1607             cop = CAIRO_OPERATOR_DEST_OUT;
1608             break;
1609         case wxCOMPOSITION_DEST_ATOP:
1610             cop = CAIRO_OPERATOR_DEST_ATOP;
1611             break;
1612         case wxCOMPOSITION_XOR:
1613             cop = CAIRO_OPERATOR_XOR;
1614             break;
1615         case wxCOMPOSITION_ADD:
1616             cop = CAIRO_OPERATOR_ADD;
1617             break;
1618         default:
1619             return false;
1620     }
1621     cairo_set_operator(m_context, cop);
1622     return true;
1623 }
1624
1625 void wxCairoContext::BeginLayer(wxDouble opacity)
1626 {
1627     m_layerOpacities.push_back(opacity);
1628     cairo_push_group(m_context);
1629 }
1630
1631 void wxCairoContext::EndLayer()
1632 {
1633     float opacity = m_layerOpacities.back();
1634     m_layerOpacities.pop_back();
1635     cairo_pop_group_to_source(m_context);
1636     cairo_paint_with_alpha(m_context,opacity);
1637 }
1638
1639 //-----------------------------------------------------------------------------
1640 // wxCairoRenderer declaration
1641 //-----------------------------------------------------------------------------
1642
1643 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
1644 {
1645 public :
1646     wxCairoRenderer() {}
1647
1648     virtual ~wxCairoRenderer() {}
1649
1650     // Context
1651
1652     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
1653     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
1654     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
1655
1656     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
1657
1658     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
1659
1660     virtual wxGraphicsContext * CreateContext( wxWindow* window );
1661
1662     virtual wxGraphicsContext * CreateMeasuringContext();
1663
1664     // Path
1665
1666     virtual wxGraphicsPath CreatePath();
1667
1668     // Matrix
1669
1670     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
1671         wxDouble tx=0.0, wxDouble ty=0.0);
1672
1673
1674     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
1675
1676     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
1677
1678     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1679     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1680         const wxColour&c1, const wxColour&c2) ;
1681
1682     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1683     // with radius r and color cColor
1684     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1685         const wxColour &oColor, const wxColour &cColor) ;
1686
1687     // sets the font
1688     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
1689
1690     // create a native bitmap representation
1691 #if 0
1692     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap )
1693     {
1694       return wxGraphicsBitmap;
1695     }
1696
1697     // create a subimage from a native image representation
1698     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  )
1699     {
1700       return wxGraphicsBitmap;
1701     }
1702 #endif
1703
1704 private :
1705     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
1706 } ;
1707
1708 //-----------------------------------------------------------------------------
1709 // wxCairoRenderer implementation
1710 //-----------------------------------------------------------------------------
1711
1712 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
1713
1714 static wxCairoRenderer gs_cairoGraphicsRenderer;
1715 // temporary hack to allow creating a cairo context on any platform
1716 extern wxGraphicsRenderer* gCairoRenderer;
1717 wxGraphicsRenderer* gCairoRenderer = &gs_cairoGraphicsRenderer;
1718
1719 #ifdef __WXGTK__
1720 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
1721 {
1722     return &gs_cairoGraphicsRenderer;
1723 }
1724 #endif
1725
1726 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
1727 {
1728     return new wxCairoContext(this,dc);
1729 }
1730
1731 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
1732 {
1733     return new wxCairoContext(this,dc);
1734 }
1735
1736 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
1737 {
1738 #ifdef __WXGTK20__
1739     const wxDCImpl *impl = dc.GetImpl();
1740     cairo_t* context = (cairo_t*) impl->GetCairoContext();
1741     if (context)
1742        return new wxCairoContext(this,dc);
1743     else
1744 #endif
1745        return NULL;
1746 }
1747
1748 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
1749 {
1750     return new wxCairoContext(this,(cairo_t*)context);
1751 }
1752
1753
1754 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
1755 {
1756 #ifdef __WXGTK__
1757     return new wxCairoContext(this,(GdkDrawable*)window);
1758 #else
1759     return NULL;
1760 #endif
1761 }
1762
1763 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
1764 {
1765     return NULL;
1766     // TODO
1767 }
1768
1769 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
1770 {
1771     return new wxCairoContext(this, window );
1772 }
1773
1774 // Path
1775
1776 wxGraphicsPath wxCairoRenderer::CreatePath()
1777 {
1778     wxGraphicsPath path;
1779     path.SetRefData( new wxCairoPathData(this) );
1780     return path;
1781 }
1782
1783
1784 // Matrix
1785
1786 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1787                                                 wxDouble tx, wxDouble ty)
1788
1789 {
1790     wxGraphicsMatrix m;
1791     wxCairoMatrixData* data = new wxCairoMatrixData( this );
1792     data->Set( a,b,c,d,tx,ty ) ;
1793     m.SetRefData(data);
1794     return m;
1795 }
1796
1797 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
1798 {
1799     if ( !pen.Ok() || pen.GetStyle() == wxTRANSPARENT )
1800         return wxNullGraphicsPen;
1801     else
1802     {
1803         wxGraphicsPen p;
1804         p.SetRefData(new wxCairoPenData( this, pen ));
1805         return p;
1806     }
1807 }
1808
1809 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
1810 {
1811     if ( !brush.Ok() || brush.GetStyle() == wxTRANSPARENT )
1812         return wxNullGraphicsBrush;
1813     else
1814     {
1815         wxGraphicsBrush p;
1816         p.SetRefData(new wxCairoBrushData( this, brush ));
1817         return p;
1818     }
1819 }
1820
1821 // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1822 wxGraphicsBrush wxCairoRenderer::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1823                                                                       const wxColour&c1, const wxColour&c2)
1824 {
1825     wxGraphicsBrush p;
1826     wxCairoBrushData* d = new wxCairoBrushData( this );
1827     d->CreateLinearGradientBrush(x1, y1, x2, y2, c1, c2);
1828     p.SetRefData(d);
1829     return p;
1830 }
1831
1832 // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1833 // with radius r and color cColor
1834 wxGraphicsBrush wxCairoRenderer::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1835                                                                       const wxColour &oColor, const wxColour &cColor)
1836 {
1837     wxGraphicsBrush p;
1838     wxCairoBrushData* d = new wxCairoBrushData( this );
1839     d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,oColor,cColor);
1840     p.SetRefData(d);
1841     return p;
1842 }
1843
1844 // sets the font
1845 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
1846 {
1847     if ( font.Ok() )
1848     {
1849         wxGraphicsFont p;
1850         p.SetRefData(new wxCairoFontData( this , font, col ));
1851         return p;
1852     }
1853     else
1854         return wxNullGraphicsFont;
1855 }
1856
1857 #endif  // wxUSE_GRAPHICS_CONTEXT