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