src/generic/graphicc.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/graphicc.cpp
   3 // Purpose:     cairo device context class
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     2006-10-03
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2006 Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #if wxUSE_GRAPHICS_CONTEXT
  19
  20 #include "wx/graphics.h"
  21
  22 #if wxUSE_CAIRO
  23
  24 // keep cairo.h from defining dllimport as we're defining the symbols inside
  25 // the wx dll in order to load them dynamically.
  26 #define cairo_public
  27
  28 #include <cairo.h>
  29
  30 bool wxCairoInit();
  31
  32 #ifndef WX_PRECOMP
  33     #include "wx/bitmap.h"
  34     #include "wx/icon.h"
  35     #include "wx/dcclient.h"
  36     #include "wx/dcmemory.h"
  37     #include "wx/dcprint.h"
  38     #include "wx/window.h"
  39 #endif
  40
  41 #include "wx/private/graphics.h"
  42 #include "wx/rawbmp.h"
  43 #include "wx/vector.h"
  44
  45 using namespace std;
  46
  47 //-----------------------------------------------------------------------------
  48 // device context implementation
  49 //
  50 // more and more of the dc functionality should be implemented by calling
  51 // the appropricate wxCairoContext, but we will have to do that step by step
  52 // also coordinate conversions should be moved to native matrix ops
  53 //-----------------------------------------------------------------------------
  54
  55 // we always stock two context states, one at entry, to be able to preserve the
  56 // state we were called with, the other one after changing to HI Graphics orientation
  57 // (this one is used for getting back clippings etc)
  58
  59 //-----------------------------------------------------------------------------
  60 // wxGraphicsPath implementation
  61 //-----------------------------------------------------------------------------
  62
  63 // TODO remove this dependency (gdiplus needs the macros)
  64
  65 #ifndef max
  66 #define max(a,b)            (((a) > (b)) ? (a) : (b))
  67 #endif
  68
  69 #ifndef min
  70 #define min(a,b)            (((a) < (b)) ? (a) : (b))
  71 #endif
  72
  73 #include <cairo.h>
  74 #ifdef __WXMSW__
  75 #include <cairo-win32.h>
  76 // Notice that the order is important: cairo-win32.h includes windows.h which
  77 // pollutes the global name space with macros so include our own header which
  78 // #undefines them after it.
  79 #include "wx/msw/private.h"
  80 #endif
  81
  82 #ifdef __WXGTK__
  83 #include <gtk/gtk.h>
  84 #include "wx/fontutil.h"
  85 #ifndef __WXGTK3__
  86 #include "wx/gtk/dc.h"
  87 #endif
  88 #endif
  89
  90 #ifdef __WXMAC__
  91 #include "wx/osx/private.h"
  92 #include <cairo-quartz.h>
  93 #include <cairo-atsui.h>
  94 #endif
  95
  96 class WXDLLIMPEXP_CORE wxCairoPathData : public wxGraphicsPathData
  97 {
  98 public :
  99     wxCairoPathData(wxGraphicsRenderer* renderer, cairo_t* path = NULL);
 100     ~wxCairoPathData();
 101
 102     virtual wxGraphicsObjectRefData *Clone() const;
 103
 104     //
 105     // These are the path primitives from which everything else can be constructed
 106     //
 107
 108     // begins a new subpath at (x,y)
 109     virtual void MoveToPoint( wxDouble x, wxDouble y );
 110
 111     // adds a straight line from the current point to (x,y)
 112     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 113
 114     // adds a cubic Bezier curve from the current point, using two control points and an end point
 115     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
 116
 117
 118     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 119     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 120
 121     // gets the last point of the current path, (0,0) if not yet set
 122     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 123
 124     // adds another path
 125     virtual void AddPath( const wxGraphicsPathData* path );
 126
 127     // closes the current sub-path
 128     virtual void CloseSubpath();
 129
 130     //
 131     // These are convenience functions which - if not available natively will be assembled
 132     // using the primitives from above
 133     //
 134
 135     /*
 136
 137     // appends a rectangle as a new closed subpath
 138     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
 139     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 140     virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
 141
 142     // 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)
 143     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )  ;
 144     */
 145
 146     // returns the native path
 147     virtual void * GetNativePath() const ;
 148
 149     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 150     virtual void UnGetNativePath(void *p) const;
 151
 152     // transforms each point of this path by the matrix
 153     virtual void Transform( const wxGraphicsMatrixData* matrix ) ;
 154
 155     // gets the bounding box enclosing all points (possibly including control points)
 156     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
 157
 158     virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxWINDING_RULE) const;
 159
 160 private :
 161     cairo_t* m_pathContext;
 162 };
 163
 164 class WXDLLIMPEXP_CORE wxCairoMatrixData : public wxGraphicsMatrixData
 165 {
 166 public :
 167     wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix = NULL ) ;
 168     virtual ~wxCairoMatrixData() ;
 169
 170     virtual wxGraphicsObjectRefData *Clone() const ;
 171
 172     // concatenates the matrix
 173     virtual void Concat( const wxGraphicsMatrixData *t );
 174
 175     // sets the matrix to the respective values
 176     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 177         wxDouble tx=0.0, wxDouble ty=0.0);
 178
 179     // gets the component valuess of the matrix
 180     virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
 181                      wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
 182
 183     // makes this the inverse matrix
 184     virtual void Invert();
 185
 186     // returns true if the elements of the transformation matrix are equal ?
 187     virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
 188
 189     // return true if this is the identity matrix
 190     virtual bool IsIdentity() const;
 191
 192     //
 193     // transformation
 194     //
 195
 196     // add the translation to this matrix
 197     virtual void Translate( wxDouble dx , wxDouble dy );
 198
 199     // add the scale to this matrix
 200     virtual void Scale( wxDouble xScale , wxDouble yScale );
 201
 202     // add the rotation to this matrix (radians)
 203     virtual void Rotate( wxDouble angle );
 204
 205     //
 206     // apply the transforms
 207     //
 208
 209     // applies that matrix to the point
 210     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 211
 212     // applies the matrix except for translations
 213     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 214
 215     // returns the native representation
 216     virtual void * GetNativeMatrix() const;
 217 private:
 218     cairo_matrix_t m_matrix ;
 219 } ;
 220
 221 // Common base class for pens and brushes.
 222 class wxCairoPenBrushBaseData : public wxGraphicsObjectRefData
 223 {
 224 public:
 225     wxCairoPenBrushBaseData(wxGraphicsRenderer* renderer,
 226                             const wxColour& col,
 227                             bool isTransparent);
 228     virtual ~wxCairoPenBrushBaseData();
 229
 230     virtual void Apply( wxGraphicsContext* context );
 231
 232 protected:
 233     // Call this to use the given bitmap as stipple. Bitmap must be non-null
 234     // and valid.
 235     void InitStipple(wxBitmap* bmp);
 236
 237     // Call this to use the given hatch style. Hatch style must be valid.
 238     void InitHatch(wxHatchStyle hatchStyle);
 239
 240
 241     double m_red;
 242     double m_green;
 243     double m_blue;
 244     double m_alpha;
 245
 246     cairo_pattern_t* m_pattern;
 247     class wxCairoBitmapData* m_bmpdata;
 248
 249 private:
 250     // Called once to allocate m_pattern if needed.
 251     void InitHatchPattern(cairo_t* ctext);
 252
 253     wxHatchStyle m_hatchStyle;
 254
 255     wxDECLARE_NO_COPY_CLASS(wxCairoPenBrushBaseData);
 256 };
 257
 258 class WXDLLIMPEXP_CORE wxCairoPenData : public wxCairoPenBrushBaseData
 259 {
 260 public:
 261     wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
 262     ~wxCairoPenData();
 263
 264     void Init();
 265
 266     virtual void Apply( wxGraphicsContext* context );
 267     virtual wxDouble GetWidth() { return m_width; }
 268
 269 private :
 270     double m_width;
 271
 272     cairo_line_cap_t m_cap;
 273     cairo_line_join_t m_join;
 274
 275     int m_count;
 276     const double *m_lengths;
 277     double *m_userLengths;
 278
 279     wxDECLARE_NO_COPY_CLASS(wxCairoPenData);
 280 };
 281
 282 class WXDLLIMPEXP_CORE wxCairoBrushData : public wxCairoPenBrushBaseData
 283 {
 284 public:
 285     wxCairoBrushData( wxGraphicsRenderer* renderer );
 286     wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
 287
 288     void CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 289                                    wxDouble x2, wxDouble y2,
 290                                    const wxGraphicsGradientStops& stops);
 291     void CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 292                                    wxDouble xc, wxDouble yc, wxDouble radius,
 293                                    const wxGraphicsGradientStops& stops);
 294
 295 protected:
 296     virtual void Init();
 297
 298     // common part of Create{Linear,Radial}GradientBrush()
 299     void AddGradientStops(const wxGraphicsGradientStops& stops);
 300 };
 301
 302 class wxCairoFontData : public wxGraphicsObjectRefData
 303 {
 304 public:
 305     wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col );
 306     wxCairoFontData(wxGraphicsRenderer* renderer,
 307                     double sizeInPixels,
 308                     const wxString& facename,
 309                     int flags,
 310                     const wxColour& col);
 311     ~wxCairoFontData();
 312
 313     virtual bool Apply( wxGraphicsContext* context );
 314 #ifdef __WXGTK__
 315     const wxFont& GetFont() const { return m_wxfont; }
 316 #endif
 317 private :
 318     void InitColour(const wxColour& col);
 319     void InitFontComponents(const wxString& facename,
 320                             cairo_font_slant_t slant,
 321                             cairo_font_weight_t weight);
 322
 323     double m_size;
 324     double m_red;
 325     double m_green;
 326     double m_blue;
 327     double m_alpha;
 328 #ifdef __WXMAC__
 329     cairo_font_face_t *m_font;
 330 #elif defined(__WXGTK__)
 331     wxFont m_wxfont;
 332 #endif
 333
 334     // These members are used when the font is created from its face name and
 335     // flags (and not from wxFont) and also even when creating it from wxFont
 336     // on the platforms not covered above.
 337     //
 338     // Notice that we can't use cairo_font_face_t instead of storing those,
 339     // even though it would be simpler and need less #ifdefs, because
 340     // cairo_toy_font_face_create() that we'd need to create it is only
 341     // available in Cairo 1.8 and we require just 1.2 currently. If we do drop
 342     // support for < 1.8 versions in the future it would be definitely better
 343     // to use cairo_toy_font_face_create() instead.
 344     wxCharBuffer m_fontName;
 345     cairo_font_slant_t m_slant;
 346     cairo_font_weight_t m_weight;
 347 };
 348
 349 class wxCairoBitmapData : public wxGraphicsBitmapData
 350 {
 351 public:
 352     wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp );
 353 #if wxUSE_IMAGE
 354     wxCairoBitmapData(wxGraphicsRenderer* renderer, const wxImage& image);
 355 #endif // wxUSE_IMAGE
 356     wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap );
 357     ~wxCairoBitmapData();
 358
 359     virtual cairo_surface_t* GetCairoSurface() { return m_surface; }
 360     virtual cairo_pattern_t* GetCairoPattern() { return m_pattern; }
 361     virtual void* GetNativeBitmap() const { return m_surface; }
 362     virtual wxSize GetSize() { return wxSize(m_width, m_height); }
 363
 364 #if wxUSE_IMAGE
 365     wxImage ConvertToImage() const;
 366 #endif // wxUSE_IMAGE
 367
 368 private :
 369     // Allocate m_buffer for the bitmap of the given size in the given format.
 370     //
 371     // Returns the stride used for the buffer.
 372     int InitBuffer(int width, int height, cairo_format_t format);
 373
 374     // Really create the surface using the buffer (which was supposed to be
 375     // filled since InitBuffer() call).
 376     void InitSurface(cairo_format_t format, int stride);
 377
 378
 379     cairo_surface_t* m_surface;
 380     cairo_pattern_t* m_pattern;
 381     int m_width;
 382     int m_height;
 383     unsigned char* m_buffer;
 384 };
 385
 386 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
 387 {
 388 public:
 389     wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc );
 390     wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc );
 391     wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc );
 392 #ifdef __WXGTK__
 393     wxCairoContext( wxGraphicsRenderer* renderer, GdkWindow *window );
 394 #endif
 395 #ifdef __WXMSW__
 396     wxCairoContext( wxGraphicsRenderer* renderer, HDC context );
 397 #endif
 398     wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context );
 399     wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window);
 400
 401     // If this ctor is used, Init() must be called by the derived class later.
 402     wxCairoContext( wxGraphicsRenderer* renderer );
 403
 404     virtual ~wxCairoContext();
 405
 406     virtual bool ShouldOffset() const
 407     {
 408         if ( !m_enableOffset )
 409             return false;
 410
 411         int penwidth = 0 ;
 412         if ( !m_pen.IsNull() )
 413         {
 414             penwidth = (int)((wxCairoPenData*)m_pen.GetRefData())->GetWidth();
 415             if ( penwidth == 0 )
 416                 penwidth = 1;
 417         }
 418         return ( penwidth % 2 ) == 1;
 419     }
 420
 421     virtual void Clip( const wxRegion &region );
 422 #ifdef __WXMSW__
 423     cairo_surface_t* m_mswSurface;
 424     WindowHDC m_mswWindowHDC;
 425 #endif
 426
 427     // clips drawings to the rect
 428     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 429
 430     // resets the clipping to original extent
 431     virtual void ResetClip();
 432
 433     virtual void * GetNativeContext();
 434
 435     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
 436
 437     virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation);
 438
 439     virtual bool SetCompositionMode(wxCompositionMode op);
 440
 441     virtual void BeginLayer(wxDouble opacity);
 442
 443     virtual void EndLayer();
 444
 445     virtual void StrokePath( const wxGraphicsPath& p );
 446     virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxWINDING_RULE );
 447
 448     virtual void Translate( wxDouble dx , wxDouble dy );
 449     virtual void Scale( wxDouble xScale , wxDouble yScale );
 450     virtual void Rotate( wxDouble angle );
 451
 452     // concatenates this transform with the current transform of this context
 453     virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
 454
 455     // sets the transform of this context
 456     virtual void SetTransform( const wxGraphicsMatrix& matrix );
 457
 458     // gets the matrix of this context
 459     virtual wxGraphicsMatrix GetTransform() const;
 460
 461     virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 462     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 463     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 464     virtual void PushState();
 465     virtual void PopState();
 466
 467     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
 468                                 wxDouble *descent, wxDouble *externalLeading ) const;
 469     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
 470
 471 protected:
 472     virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
 473
 474     void Init(cairo_t *context);
 475
 476 private:
 477     cairo_t* m_context;
 478
 479     wxVector<float> m_layerOpacities;
 480
 481     wxDECLARE_NO_COPY_CLASS(wxCairoContext);
 482 };
 483
 484 #if wxUSE_IMAGE
 485 // ----------------------------------------------------------------------------
 486 // wxCairoImageContext: context associated with a wxImage.
 487 // ----------------------------------------------------------------------------
 488
 489 class wxCairoImageContext : public wxCairoContext
 490 {
 491 public:
 492     wxCairoImageContext(wxGraphicsRenderer* renderer, wxImage& image) :
 493         wxCairoContext(renderer),
 494         m_image(image),
 495         m_data(renderer, image)
 496     {
 497         Init(cairo_create(m_data.GetCairoSurface()));
 498     }
 499
 500     virtual ~wxCairoImageContext()
 501     {
 502         m_image = m_data.ConvertToImage();
 503     }
 504
 505 private:
 506     wxImage& m_image;
 507     wxCairoBitmapData m_data;
 508
 509     wxDECLARE_NO_COPY_CLASS(wxCairoImageContext);
 510 };
 511 #endif // wxUSE_IMAGE
 512
 513 // ----------------------------------------------------------------------------
 514 // wxCairoPenBrushBaseData implementation
 515 //-----------------------------------------------------------------------------
 516
 517 wxCairoPenBrushBaseData::wxCairoPenBrushBaseData(wxGraphicsRenderer* renderer,
 518                                                  const wxColour& col,
 519                                                  bool isTransparent)
 520     : wxGraphicsObjectRefData(renderer)
 521 {
 522     m_hatchStyle = wxHATCHSTYLE_INVALID;
 523     m_pattern = NULL;
 524     m_bmpdata = NULL;
 525
 526     if ( isTransparent )
 527     {
 528         m_red =
 529         m_green =
 530         m_blue =
 531         m_alpha = 0;
 532     }
 533     else // non-transparent
 534     {
 535         m_red = col.Red()/255.0;
 536         m_green = col.Green()/255.0;
 537         m_blue = col.Blue()/255.0;
 538         m_alpha = col.Alpha()/255.0;
 539     }
 540 }
 541
 542 wxCairoPenBrushBaseData::~wxCairoPenBrushBaseData()
 543 {
 544     if (m_bmpdata)
 545     {
 546         // Deleting the bitmap data also deletes the pattern referenced by
 547         // m_pattern, so set it to NULL to avoid deleting it twice.
 548         delete m_bmpdata;
 549         m_pattern = NULL;
 550     }
 551     if (m_pattern)
 552         cairo_pattern_destroy(m_pattern);
 553 }
 554
 555 void wxCairoPenBrushBaseData::InitHatchPattern(cairo_t* ctext)
 556 {
 557     cairo_surface_t* const
 558         surface = cairo_surface_create_similar(
 559                     cairo_get_target(ctext), CAIRO_CONTENT_COLOR_ALPHA, 10, 10
 560                 );
 561
 562     cairo_t* const cr = cairo_create(surface);
 563     cairo_set_line_cap(cr, CAIRO_LINE_CAP_SQUARE);
 564     cairo_set_line_width(cr, 1);
 565     cairo_set_line_join(cr,CAIRO_LINE_JOIN_MITER);
 566
 567     switch ( m_hatchStyle )
 568     {
 569         case wxHATCHSTYLE_CROSS:
 570             cairo_move_to(cr, 5, 0);
 571             cairo_line_to(cr, 5, 10);
 572             cairo_move_to(cr, 0, 5);
 573             cairo_line_to(cr, 10, 5);
 574             break;
 575
 576         case wxHATCHSTYLE_BDIAGONAL:
 577             cairo_move_to(cr, 0, 10);
 578             cairo_line_to(cr, 10, 0);
 579             break;
 580
 581         case wxHATCHSTYLE_FDIAGONAL:
 582             cairo_move_to(cr, 0, 0);
 583             cairo_line_to(cr, 10, 10);
 584             break;
 585
 586         case wxHATCHSTYLE_CROSSDIAG:
 587             cairo_move_to(cr, 0, 0);
 588             cairo_line_to(cr, 10, 10);
 589             cairo_move_to(cr, 10, 0);
 590             cairo_line_to(cr, 0, 10);
 591             break;
 592
 593         case wxHATCHSTYLE_HORIZONTAL:
 594             cairo_move_to(cr, 0, 5);
 595             cairo_line_to(cr, 10, 5);
 596             break;
 597
 598         case wxHATCHSTYLE_VERTICAL:
 599             cairo_move_to(cr, 5, 0);
 600             cairo_line_to(cr, 5, 10);
 601             break;
 602
 603         default:
 604             wxFAIL_MSG(wxS("Invalid hatch pattern style."));
 605     }
 606
 607     cairo_set_source_rgba(cr, m_red, m_green, m_blue, m_alpha);
 608     cairo_stroke(cr);
 609
 610     cairo_destroy(cr);
 611
 612     m_pattern = cairo_pattern_create_for_surface(surface);
 613     cairo_surface_destroy(surface);
 614     cairo_pattern_set_extend(m_pattern, CAIRO_EXTEND_REPEAT);
 615 }
 616
 617 void wxCairoPenBrushBaseData::InitStipple(wxBitmap* bmp)
 618 {
 619     wxCHECK_RET( bmp && bmp->IsOk(), wxS("Invalid stippled bitmap") );
 620
 621     m_bmpdata = new wxCairoBitmapData(GetRenderer(), *bmp);
 622     m_pattern = m_bmpdata->GetCairoPattern();
 623     cairo_pattern_set_extend(m_pattern, CAIRO_EXTEND_REPEAT);
 624 }
 625
 626 void wxCairoPenBrushBaseData::InitHatch(wxHatchStyle hatchStyle)
 627 {
 628     // We can't create m_pattern right now as we don't have the Cairo context
 629     // needed for it, so just remember that we need to do it.
 630     m_hatchStyle = hatchStyle;
 631 }
 632
 633 void wxCairoPenBrushBaseData::Apply( wxGraphicsContext* context )
 634 {
 635     cairo_t* const ctext = (cairo_t*) context->GetNativeContext();
 636
 637     if ( m_hatchStyle != wxHATCHSTYLE_INVALID && !m_pattern )
 638         InitHatchPattern(ctext);
 639
 640     if ( m_pattern )
 641         cairo_set_source(ctext, m_pattern);
 642     else
 643         cairo_set_source_rgba(ctext, m_red, m_green, m_blue, m_alpha);
 644 }
 645
 646 //-----------------------------------------------------------------------------
 647 // wxCairoPenData implementation
 648 //-----------------------------------------------------------------------------
 649
 650 wxCairoPenData::~wxCairoPenData()
 651 {
 652     delete[] m_userLengths;
 653 }
 654
 655 void wxCairoPenData::Init()
 656 {
 657     m_lengths = NULL;
 658     m_userLengths = NULL;
 659     m_width = 0;
 660     m_count = 0;
 661 }
 662
 663 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
 664     : wxCairoPenBrushBaseData(renderer, pen.GetColour(), pen.IsTransparent())
 665 {
 666     Init();
 667     m_width = pen.GetWidth();
 668     if (m_width <= 0.0)
 669         m_width = 0.1;
 670
 671     switch ( pen.GetCap() )
 672     {
 673     case wxCAP_ROUND :
 674         m_cap = CAIRO_LINE_CAP_ROUND;
 675         break;
 676
 677     case wxCAP_PROJECTING :
 678         m_cap = CAIRO_LINE_CAP_SQUARE;
 679         break;
 680
 681     case wxCAP_BUTT :
 682         m_cap = CAIRO_LINE_CAP_BUTT;
 683         break;
 684
 685     default :
 686         m_cap = CAIRO_LINE_CAP_BUTT;
 687         break;
 688     }
 689
 690     switch ( pen.GetJoin() )
 691     {
 692     case wxJOIN_BEVEL :
 693         m_join = CAIRO_LINE_JOIN_BEVEL;
 694         break;
 695
 696     case wxJOIN_MITER :
 697         m_join = CAIRO_LINE_JOIN_MITER;
 698         break;
 699
 700     case wxJOIN_ROUND :
 701         m_join = CAIRO_LINE_JOIN_ROUND;
 702         break;
 703
 704     default :
 705         m_join = CAIRO_LINE_JOIN_MITER;
 706         break;
 707     }
 708
 709     const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
 710     const double dotted[] =
 711     {
 712         dashUnit , dashUnit + 2.0
 713     };
 714     static const double short_dashed[] =
 715     {
 716         9.0 , 6.0
 717     };
 718     static const double dashed[] =
 719     {
 720         19.0 , 9.0
 721     };
 722     static const double dotted_dashed[] =
 723     {
 724         9.0 , 6.0 , 3.0 , 3.0
 725     };
 726
 727     switch ( pen.GetStyle() )
 728     {
 729     case wxPENSTYLE_SOLID :
 730         break;
 731
 732     case wxPENSTYLE_DOT :
 733         m_count = WXSIZEOF(dotted);
 734         m_userLengths = new double[ m_count ] ;
 735         memcpy( m_userLengths, dotted, sizeof(dotted) );
 736         m_lengths = m_userLengths;
 737         break;
 738
 739     case wxPENSTYLE_LONG_DASH :
 740         m_lengths = dashed ;
 741         m_count = WXSIZEOF(dashed);
 742         break;
 743
 744     case wxPENSTYLE_SHORT_DASH :
 745         m_lengths = short_dashed ;
 746         m_count = WXSIZEOF(short_dashed);
 747         break;
 748
 749     case wxPENSTYLE_DOT_DASH :
 750         m_lengths = dotted_dashed ;
 751         m_count = WXSIZEOF(dotted_dashed);
 752         break;
 753
 754     case wxPENSTYLE_USER_DASH :
 755         {
 756             wxDash *wxdashes ;
 757             m_count = pen.GetDashes( &wxdashes ) ;
 758             if ((wxdashes != NULL) && (m_count > 0))
 759             {
 760                 m_userLengths = new double[m_count] ;
 761                 for ( int i = 0 ; i < m_count ; ++i )
 762                 {
 763                     m_userLengths[i] = wxdashes[i] * dashUnit ;
 764
 765                     if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
 766                         m_userLengths[i] = dashUnit + 2.0 ;
 767                     else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
 768                         m_userLengths[i] = dashUnit ;
 769                 }
 770             }
 771             m_lengths = m_userLengths ;
 772         }
 773         break;
 774
 775     case wxPENSTYLE_STIPPLE :
 776     case wxPENSTYLE_STIPPLE_MASK :
 777     case wxPENSTYLE_STIPPLE_MASK_OPAQUE :
 778         InitStipple(pen.GetStipple());
 779         break;
 780
 781     default :
 782         if ( pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH
 783             && pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
 784         {
 785             InitHatch(static_cast<wxHatchStyle>(pen.GetStyle()));
 786         }
 787         break;
 788     }
 789 }
 790
 791 void wxCairoPenData::Apply( wxGraphicsContext* context )
 792 {
 793     wxCairoPenBrushBaseData::Apply(context);
 794
 795     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 796     cairo_set_line_width(ctext,m_width);
 797     cairo_set_line_cap(ctext,m_cap);
 798     cairo_set_line_join(ctext,m_join);
 799     cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
 800 }
 801
 802 //-----------------------------------------------------------------------------
 803 // wxCairoBrushData implementation
 804 //-----------------------------------------------------------------------------
 805
 806 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
 807     : wxCairoPenBrushBaseData(renderer, wxColour(), true /* transparent */)
 808 {
 809     Init();
 810 }
 811
 812 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer,
 813                                     const wxBrush &brush )
 814     : wxCairoPenBrushBaseData(renderer, brush.GetColour(), brush.IsTransparent())
 815 {
 816     Init();
 817
 818     switch ( brush.GetStyle() )
 819     {
 820         case wxBRUSHSTYLE_STIPPLE:
 821         case wxBRUSHSTYLE_STIPPLE_MASK:
 822         case wxBRUSHSTYLE_STIPPLE_MASK_OPAQUE:
 823             InitStipple(brush.GetStipple());
 824             break;
 825
 826         default:
 827             if ( brush.IsHatch() )
 828                 InitHatch(static_cast<wxHatchStyle>(brush.GetStyle()));
 829             break;
 830     }
 831 }
 832
 833 void wxCairoBrushData::AddGradientStops(const wxGraphicsGradientStops& stops)
 834 {
 835     // loop over all the stops, they include the beginning and ending ones
 836     const unsigned numStops = stops.GetCount();
 837     for ( unsigned n = 0; n < numStops; n++ )
 838     {
 839         const wxGraphicsGradientStop stop = stops.Item(n);
 840
 841         const wxColour col = stop.GetColour();
 842
 843         cairo_pattern_add_color_stop_rgba
 844         (
 845             m_pattern,
 846             stop.GetPosition(),
 847             col.Red()/255.0,
 848             col.Green()/255.0,
 849             col.Blue()/255.0,
 850             col.Alpha()/255.0
 851         );
 852     }
 853
 854     wxASSERT_MSG(cairo_pattern_status(m_pattern) == CAIRO_STATUS_SUCCESS,
 855                  wxT("Couldn't create cairo pattern"));
 856 }
 857
 858 void
 859 wxCairoBrushData::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
 860                                             wxDouble x2, wxDouble y2,
 861                                             const wxGraphicsGradientStops& stops)
 862 {
 863     m_pattern = cairo_pattern_create_linear(x1,y1,x2,y2);
 864
 865     AddGradientStops(stops);
 866 }
 867
 868 void
 869 wxCairoBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 870                                             wxDouble xc, wxDouble yc,
 871                                             wxDouble radius,
 872                                             const wxGraphicsGradientStops& stops)
 873 {
 874     m_pattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
 875
 876     AddGradientStops(stops);
 877 }
 878
 879 void wxCairoBrushData::Init()
 880 {
 881     m_pattern = NULL;
 882     m_bmpdata = NULL;
 883 }
 884
 885 //-----------------------------------------------------------------------------
 886 // wxCairoFontData implementation
 887 //-----------------------------------------------------------------------------
 888
 889 void wxCairoFontData::InitColour(const wxColour& col)
 890 {
 891     m_red = col.Red()/255.0;
 892     m_green = col.Green()/255.0;
 893     m_blue = col.Blue()/255.0;
 894     m_alpha = col.Alpha()/255.0;
 895 }
 896
 897 void
 898 wxCairoFontData::InitFontComponents(const wxString& facename,
 899                                     cairo_font_slant_t slant,
 900                                     cairo_font_weight_t weight)
 901 {
 902     m_fontName = facename.mb_str(wxConvUTF8);
 903     m_slant = slant;
 904     m_weight = weight;
 905 }
 906
 907 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
 908                          const wxColour& col )
 909     : wxGraphicsObjectRefData(renderer)
 910 #ifdef __WXGTK__
 911     , m_wxfont(font)
 912 #endif
 913 {
 914     InitColour(col);
 915
 916     m_size = font.GetPointSize();
 917
 918 #ifdef __WXMAC__
 919     m_font = cairo_quartz_font_face_create_for_cgfont( font.OSXGetCGFont() );
 920 #elif defined(__WXGTK__)
 921 #else
 922     InitFontComponents
 923     (
 924         font.GetFaceName(),
 925         font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC
 926                                               : CAIRO_FONT_SLANT_NORMAL,
 927         font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD
 928                                               : CAIRO_FONT_WEIGHT_NORMAL
 929     );
 930 #endif
 931 }
 932
 933 wxCairoFontData::wxCairoFontData(wxGraphicsRenderer* renderer,
 934                                  double sizeInPixels,
 935                                  const wxString& facename,
 936                                  int flags,
 937                                  const wxColour& col) :
 938     wxGraphicsObjectRefData(renderer)
 939 {
 940     InitColour(col);
 941
 942     // Resolution for Cairo image surfaces is 72 DPI meaning that the sizes in
 943     // points and pixels are identical, so we can just pass the size in pixels
 944     // directly to cairo_set_font_size().
 945     m_size = sizeInPixels;
 946
 947 #if defined(__WXMAC__)
 948     m_font = NULL;
 949 #endif
 950
 951     // There is no need to set m_underlined under wxGTK in this case, it can
 952     // only be used if m_font != NULL.
 953
 954     InitFontComponents
 955     (
 956         facename,
 957         flags & wxFONTFLAG_ITALIC ? CAIRO_FONT_SLANT_ITALIC
 958                                   : CAIRO_FONT_SLANT_NORMAL,
 959         flags & wxFONTFLAG_BOLD ? CAIRO_FONT_WEIGHT_BOLD
 960                                 : CAIRO_FONT_WEIGHT_NORMAL
 961     );
 962 }
 963
 964 wxCairoFontData::~wxCairoFontData()
 965 {
 966 #ifdef __WXMAC__
 967     if ( m_font )
 968         cairo_font_face_destroy( m_font );
 969 #endif
 970 }
 971
 972 bool wxCairoFontData::Apply( wxGraphicsContext* context )
 973 {
 974     cairo_t * ctext = (cairo_t*) context->GetNativeContext();
 975     cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
 976 #ifdef __WXGTK__
 977     if (m_wxfont.IsOk())
 978     {
 979         // Nothing to do, the caller uses Pango layout functions to do
 980         // everything.
 981         return true;
 982     }
 983 #elif defined(__WXMAC__)
 984     if ( m_font )
 985     {
 986         cairo_set_font_face(ctext, m_font);
 987         cairo_set_font_size(ctext, m_size );
 988         return true;
 989     }
 990 #endif
 991
 992     // If we get here, we must be on a platform without native font support or
 993     // we're using toy Cairo API even under wxGTK/wxMac.
 994     cairo_select_font_face(ctext, m_fontName, m_slant, m_weight );
 995     cairo_set_font_size(ctext, m_size );
 996
 997     // Indicate that we don't use native fonts for the platforms which care
 998     // about this (currently only wxGTK).
 999     return false;
1000 }
1001
1002 //-----------------------------------------------------------------------------
1003 // wxCairoPathData implementation
1004 //-----------------------------------------------------------------------------
1005
1006 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
1007     : wxGraphicsPathData(renderer)
1008 {
1009     if (pathcontext)
1010     {
1011         m_pathContext = pathcontext;
1012     }
1013     else
1014     {
1015         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
1016         m_pathContext = cairo_create(surface);
1017         cairo_surface_destroy (surface);
1018     }
1019 }
1020
1021 wxCairoPathData::~wxCairoPathData()
1022 {
1023     cairo_destroy(m_pathContext);
1024 }
1025
1026 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
1027 {
1028     cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
1029     cairo_t* pathcontext = cairo_create(surface);
1030     cairo_surface_destroy (surface);
1031
1032     cairo_path_t* path = cairo_copy_path(m_pathContext);
1033     cairo_append_path(pathcontext, path);
1034     cairo_path_destroy(path);
1035     return new wxCairoPathData( GetRenderer() ,pathcontext);
1036 }
1037
1038
1039 void* wxCairoPathData::GetNativePath() const
1040 {
1041     return cairo_copy_path(m_pathContext) ;
1042 }
1043
1044 void wxCairoPathData::UnGetNativePath(void *p) const
1045 {
1046     cairo_path_destroy((cairo_path_t*)p);
1047 }
1048
1049 //
1050 // The Primitives
1051 //
1052
1053 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
1054 {
1055     cairo_move_to(m_pathContext,x,y);
1056 }
1057
1058 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
1059 {
1060     cairo_line_to(m_pathContext,x,y);
1061 }
1062
1063 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
1064 {
1065     cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
1066     cairo_append_path(m_pathContext, p);
1067     UnGetNativePath(p);
1068 }
1069
1070 void wxCairoPathData::CloseSubpath()
1071 {
1072     cairo_close_path(m_pathContext);
1073 }
1074
1075 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
1076 {
1077     cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
1078 }
1079
1080 // gets the last point of the current path, (0,0) if not yet set
1081 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
1082 {
1083     double dx,dy;
1084     cairo_get_current_point(m_pathContext,&dx,&dy);
1085     if (x)
1086         *x = dx;
1087     if (y)
1088         *y = dy;
1089 }
1090
1091 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
1092 {
1093     // as clockwise means positive in our system (y pointing downwards)
1094     // TODO make this interpretation dependent of the
1095     // real device trans
1096     if ( clockwise||(endAngle-startAngle)>=2*M_PI)
1097         cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
1098     else
1099         cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
1100 }
1101
1102 // transforms each point of this path by the matrix
1103 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
1104 {
1105     // as we don't have a true path object, we have to apply the inverse
1106     // matrix to the context
1107     cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
1108     cairo_matrix_invert( &m );
1109     cairo_transform(m_pathContext,&m);
1110 }
1111
1112 // gets the bounding box enclosing all points (possibly including control points)
1113 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
1114 {
1115     double x1,y1,x2,y2;
1116
1117     cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
1118     if ( x2 < x1 )
1119     {
1120         *x = x2;
1121         *w = x1-x2;
1122     }
1123     else
1124     {
1125         *x = x1;
1126         *w = x2-x1;
1127     }
1128
1129     if( y2 < y1 )
1130     {
1131         *y = y2;
1132         *h = y1-y2;
1133     }
1134     else
1135     {
1136         *y = y1;
1137         *h = y2-y1;
1138     }
1139 }
1140
1141 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle ) const
1142 {
1143     cairo_set_fill_rule(m_pathContext,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1144     return cairo_in_fill( m_pathContext, x, y) != 0;
1145 }
1146
1147 //-----------------------------------------------------------------------------
1148 // wxCairoMatrixData implementation
1149 //-----------------------------------------------------------------------------
1150
1151 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
1152     : wxGraphicsMatrixData(renderer)
1153 {
1154     if ( matrix )
1155         m_matrix = *matrix;
1156 }
1157
1158 wxCairoMatrixData::~wxCairoMatrixData()
1159 {
1160     // nothing to do
1161 }
1162
1163 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
1164 {
1165     return new wxCairoMatrixData(GetRenderer(),&m_matrix);
1166 }
1167
1168 // concatenates the matrix
1169 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
1170 {
1171     cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
1172 }
1173
1174 // sets the matrix to the respective values
1175 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1176                         wxDouble tx, wxDouble ty)
1177 {
1178     cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
1179 }
1180
1181 // gets the component valuess of the matrix
1182 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b,  wxDouble* c,
1183                             wxDouble* d, wxDouble* tx, wxDouble* ty) const
1184 {
1185     if (a)  *a = m_matrix.xx;
1186     if (b)  *b = m_matrix.yx;
1187     if (c)  *c = m_matrix.xy;
1188     if (d)  *d = m_matrix.yy;
1189     if (tx) *tx= m_matrix.x0;
1190     if (ty) *ty= m_matrix.y0;
1191 }
1192
1193 // makes this the inverse matrix
1194 void wxCairoMatrixData::Invert()
1195 {
1196     cairo_matrix_invert( &m_matrix );
1197 }
1198
1199 // returns true if the elements of the transformation matrix are equal ?
1200 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
1201 {
1202     const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
1203     return (
1204         m_matrix.xx == tm->xx &&
1205         m_matrix.yx == tm->yx &&
1206         m_matrix.xy == tm->xy &&
1207         m_matrix.yy == tm->yy &&
1208         m_matrix.x0 == tm->x0 &&
1209         m_matrix.y0 == tm->y0 ) ;
1210 }
1211
1212 // return true if this is the identity matrix
1213 bool wxCairoMatrixData::IsIdentity() const
1214 {
1215     return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
1216         m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
1217 }
1218
1219 //
1220 // transformation
1221 //
1222
1223 // add the translation to this matrix
1224 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
1225 {
1226     cairo_matrix_translate( &m_matrix, dx, dy) ;
1227 }
1228
1229 // add the scale to this matrix
1230 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
1231 {
1232     cairo_matrix_scale( &m_matrix, xScale, yScale) ;
1233 }
1234
1235 // add the rotation to this matrix (radians)
1236 void wxCairoMatrixData::Rotate( wxDouble angle )
1237 {
1238     cairo_matrix_rotate( &m_matrix, angle) ;
1239 }
1240
1241 //
1242 // apply the transforms
1243 //
1244
1245 // applies that matrix to the point
1246 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
1247 {
1248     double lx = *x, ly = *y ;
1249     cairo_matrix_transform_point( &m_matrix, &lx, &ly);
1250     *x = lx;
1251     *y = ly;
1252 }
1253
1254 // applies the matrix except for translations
1255 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1256 {
1257     double lx = *dx, ly = *dy ;
1258     cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1259     *dx = lx;
1260     *dy = ly;
1261 }
1262
1263 // returns the native representation
1264 void * wxCairoMatrixData::GetNativeMatrix() const
1265 {
1266     return (void*) &m_matrix;
1267 }
1268
1269 // ----------------------------------------------------------------------------
1270 // wxCairoBitmap implementation
1271 // ----------------------------------------------------------------------------
1272
1273 int wxCairoBitmapData::InitBuffer(int width, int height, cairo_format_t format)
1274 {
1275     wxUnusedVar(format); // Only really unused with Cairo < 1.6.
1276
1277     // Determine the stride: use cairo_format_stride_for_width() if available
1278     // but fall back to 4*width for the earlier versions as this is what that
1279     // function always returns, even in latest Cairo, anyhow.
1280     int stride;
1281 #if CAIRO_VERSION >= CAIRO_VERSION_ENCODE(1, 6, 0)
1282     if ( cairo_version() >= CAIRO_VERSION_ENCODE(1, 6, 0) )
1283     {
1284         stride = cairo_format_stride_for_width(format, width);
1285
1286         // All our code would totally break if stride were not a multiple of 4
1287         // so ensure this is the case.
1288         if ( stride % 4 )
1289         {
1290             wxFAIL_MSG("Unexpected Cairo image surface stride.");
1291
1292             stride += 4 - stride % 4;
1293         }
1294     }
1295     else
1296 #endif
1297         stride = 4*width;
1298
1299     m_width = width;
1300     m_height = height;
1301     m_buffer = new unsigned char[height*stride];
1302
1303     return stride;
1304 }
1305
1306 void wxCairoBitmapData::InitSurface(cairo_format_t format, int stride)
1307 {
1308     m_surface = cairo_image_surface_create_for_data(
1309                             m_buffer, format, m_width, m_height, stride);
1310     m_pattern = cairo_pattern_create_for_surface(m_surface);
1311 }
1312
1313 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap ) :
1314     wxGraphicsBitmapData( renderer )
1315 {
1316     m_surface = bitmap;
1317     m_pattern = cairo_pattern_create_for_surface(m_surface);
1318 }
1319
1320 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp ) : wxGraphicsBitmapData( renderer )
1321 {
1322     wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1323
1324 #ifdef wxHAS_RAW_BITMAP
1325     // Create a surface object and copy the bitmap pixel data to it.  if the
1326     // image has alpha (or a mask represented as alpha) then we'll use a
1327     // different format and iterator than if it doesn't...
1328     cairo_format_t bufferFormat = bmp.GetDepth() == 32
1329 #if defined(__WXGTK__) && !defined(__WXGTK3__)
1330                                             || bmp.GetMask()
1331 #endif
1332                                         ? CAIRO_FORMAT_ARGB32
1333                                         : CAIRO_FORMAT_RGB24;
1334
1335     int stride = InitBuffer(bmp.GetWidth(), bmp.GetHeight(), bufferFormat);
1336
1337     wxBitmap bmpSource = bmp;  // we need a non-const instance
1338     wxUint32* data = (wxUint32*)m_buffer;
1339
1340     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1341     {
1342         // use the bitmap's alpha
1343         wxAlphaPixelData
1344             pixData(bmpSource, wxPoint(0, 0), wxSize(m_width, m_height));
1345         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1346
1347         wxAlphaPixelData::Iterator p(pixData);
1348         for (int y=0; y<m_height; y++)
1349         {
1350             wxAlphaPixelData::Iterator rowStart = p;
1351             wxUint32* const rowStartDst = data;
1352             for (int x=0; x<m_width; x++)
1353             {
1354                 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1355                 // with alpha in the upper 8 bits, then red, then green, then
1356                 // blue. The 32-bit quantities are stored native-endian.
1357                 // Pre-multiplied alpha is used.
1358                 unsigned char alpha = p.Alpha();
1359                 if (alpha == 0)
1360                     *data = 0;
1361                 else
1362                     *data = ( alpha                      << 24
1363                               | (p.Red() * alpha/255)    << 16
1364                               | (p.Green() * alpha/255)  <<  8
1365                               | (p.Blue() * alpha/255) );
1366                 ++data;
1367                 ++p;
1368             }
1369
1370             data = rowStartDst + stride / 4;
1371             p = rowStart;
1372             p.OffsetY(pixData, 1);
1373         }
1374     }
1375     else  // no alpha
1376     {
1377         wxNativePixelData
1378             pixData(bmpSource, wxPoint(0, 0), wxSize(m_width, m_height));
1379         wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1380
1381         wxNativePixelData::Iterator p(pixData);
1382         for (int y=0; y<m_height; y++)
1383         {
1384             wxNativePixelData::Iterator rowStart = p;
1385             wxUint32* const rowStartDst = data;
1386             for (int x=0; x<m_width; x++)
1387             {
1388                 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1389                 // the upper 8 bits unused. Red, Green, and Blue are stored in
1390                 // the remaining 24 bits in that order.  The 32-bit quantities
1391                 // are stored native-endian.
1392                 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1393                 ++data;
1394                 ++p;
1395             }
1396
1397             data = rowStartDst + stride / 4;
1398             p = rowStart;
1399             p.OffsetY(pixData, 1);
1400         }
1401     }
1402 #if defined(__WXMSW__) || defined(__WXGTK3__)
1403     // if there is a mask, set the alpha bytes in the target buffer to
1404     // fully transparent or fully opaque
1405     if (bmpSource.GetMask())
1406     {
1407         wxBitmap bmpMask = bmpSource.GetMaskBitmap();
1408         bufferFormat = CAIRO_FORMAT_ARGB32;
1409         data = (wxUint32*)m_buffer;
1410         wxNativePixelData
1411             pixData(bmpMask, wxPoint(0, 0), wxSize(m_width, m_height));
1412         wxCHECK_RET( pixData, wxT("Failed to gain raw access to mask data."));
1413
1414         wxNativePixelData::Iterator p(pixData);
1415         for (int y=0; y<m_height; y++)
1416         {
1417             wxNativePixelData::Iterator rowStart = p;
1418             wxUint32* const rowStartDst = data;
1419             for (int x=0; x<m_width; x++)
1420             {
1421                 if (p.Red()+p.Green()+p.Blue() == 0)
1422                     *data = 0;
1423                 else
1424                     *data = (wxALPHA_OPAQUE << 24) | (*data & 0x00FFFFFF);
1425                 ++data;
1426                 ++p;
1427             }
1428
1429             data = rowStartDst + stride / 4;
1430             p = rowStart;
1431             p.OffsetY(pixData, 1);
1432         }
1433     }
1434 #endif
1435
1436     InitSurface(bufferFormat, stride);
1437 #endif // wxHAS_RAW_BITMAP
1438 }
1439
1440 #if wxUSE_IMAGE
1441
1442 // Helper functions for dealing with alpha pre-multiplication.
1443 namespace
1444 {
1445
1446 inline unsigned char Premultiply(unsigned char alpha, unsigned char data)
1447 {
1448     return alpha ? (data * alpha)/0xff : data;
1449 }
1450
1451 inline unsigned char Unpremultiply(unsigned char alpha, unsigned char data)
1452 {
1453     return alpha ? (data * 0xff)/alpha : data;
1454 }
1455
1456 } // anonymous namespace
1457
1458 wxCairoBitmapData::wxCairoBitmapData(wxGraphicsRenderer* renderer,
1459                                      const wxImage& image)
1460     : wxGraphicsBitmapData(renderer)
1461 {
1462     const cairo_format_t bufferFormat = image.HasAlpha()
1463                                             ? CAIRO_FORMAT_ARGB32
1464                                             : CAIRO_FORMAT_RGB24;
1465
1466     int stride = InitBuffer(image.GetWidth(), image.GetHeight(), bufferFormat);
1467
1468     // Copy wxImage data into the buffer. Notice that we work with wxUint32
1469     // values and not bytes becase Cairo always works with buffers in native
1470     // endianness.
1471     wxUint32* dst = reinterpret_cast<wxUint32*>(m_buffer);
1472     const unsigned char* src = image.GetData();
1473
1474     if ( bufferFormat == CAIRO_FORMAT_ARGB32 )
1475     {
1476         const unsigned char* alpha = image.GetAlpha();
1477
1478         for ( int y = 0; y < m_height; y++ )
1479         {
1480             wxUint32* const rowStartDst = dst;
1481
1482             for ( int x = 0; x < m_width; x++ )
1483             {
1484                 const unsigned char a = *alpha++;
1485
1486                 *dst++ = a                      << 24 |
1487                          Premultiply(a, src[0]) << 16 |
1488                          Premultiply(a, src[1]) <<  8 |
1489                          Premultiply(a, src[2]);
1490                 src += 3;
1491             }
1492
1493             dst = rowStartDst + stride / 4;
1494         }
1495     }
1496     else // RGB
1497     {
1498         for ( int y = 0; y < m_height; y++ )
1499         {
1500             wxUint32* const rowStartDst = dst;
1501
1502             for ( int x = 0; x < m_width; x++ )
1503             {
1504                 *dst++ = src[0] << 16 |
1505                          src[1] <<  8 |
1506                          src[2];
1507                 src += 3;
1508             }
1509
1510             dst = rowStartDst + stride / 4;
1511         }
1512     }
1513
1514     InitSurface(bufferFormat, stride);
1515 }
1516
1517 wxImage wxCairoBitmapData::ConvertToImage() const
1518 {
1519     wxImage image(m_width, m_height, false /* don't clear */);
1520
1521     // Get the surface type and format.
1522     wxCHECK_MSG( cairo_surface_get_type(m_surface) == CAIRO_SURFACE_TYPE_IMAGE,
1523                  wxNullImage,
1524                  wxS("Can't convert non-image surface to image.") );
1525
1526     switch ( cairo_image_surface_get_format(m_surface) )
1527     {
1528         case CAIRO_FORMAT_ARGB32:
1529             image.SetAlpha();
1530             break;
1531
1532         case CAIRO_FORMAT_RGB24:
1533             // Nothing to do, we don't use alpha by default.
1534             break;
1535
1536         case CAIRO_FORMAT_A8:
1537         case CAIRO_FORMAT_A1:
1538             wxFAIL_MSG(wxS("Unsupported Cairo image surface type."));
1539             return wxNullImage;
1540
1541         default:
1542             wxFAIL_MSG(wxS("Unknown Cairo image surface type."));
1543             return wxNullImage;
1544     }
1545
1546     // Prepare for copying data.
1547     const wxUint32* src = (wxUint32*)cairo_image_surface_get_data(m_surface);
1548     wxCHECK_MSG( src, wxNullImage, wxS("Failed to get Cairo surface data.") );
1549
1550     int stride = cairo_image_surface_get_stride(m_surface);
1551     wxCHECK_MSG( stride > 0, wxNullImage,
1552                  wxS("Failed to get Cairo surface stride.") );
1553
1554     // As we work with wxUint32 pointers and not char ones, we need to adjust
1555     // the stride accordingly. This should be lossless as the stride must be a
1556     // multiple of pixel size.
1557     wxASSERT_MSG( !(stride % sizeof(wxUint32)), wxS("Unexpected stride.") );
1558     stride /= sizeof(wxUint32);
1559
1560     unsigned char* dst = image.GetData();
1561     unsigned char *alpha = image.GetAlpha();
1562     if ( alpha )
1563     {
1564         // We need to also copy alpha and undo the pre-multiplication as Cairo
1565         // stores pre-multiplied values in this format while wxImage does not.
1566         for ( int y = 0; y < m_height; y++ )
1567         {
1568             const wxUint32* const rowStart = src;
1569             for ( int x = 0; x < m_width; x++ )
1570             {
1571                 const wxUint32 argb = *src++;
1572
1573                 *alpha++ = (argb & 0xff000000) >> 24;
1574
1575                 // Copy the RGB data undoing the pre-multiplication.
1576                 *dst++ = Unpremultiply(*alpha, (argb & 0x00ff0000) >> 16);
1577                 *dst++ = Unpremultiply(*alpha, (argb & 0x0000ff00) >>  8);
1578                 *dst++ = Unpremultiply(*alpha, (argb & 0x000000ff));
1579             }
1580
1581             src = rowStart + stride;
1582         }
1583     }
1584     else // RGB
1585     {
1586         // Things are pretty simple in this case, just copy RGB bytes.
1587         for ( int y = 0; y < m_height; y++ )
1588         {
1589             const wxUint32* const rowStart = src;
1590             for ( int x = 0; x < m_width; x++ )
1591             {
1592                 const wxUint32 argb = *src++;
1593
1594                 *dst++ = (argb & 0x00ff0000) >> 16;
1595                 *dst++ = (argb & 0x0000ff00) >>  8;
1596                 *dst++ = (argb & 0x000000ff);
1597             }
1598
1599             src = rowStart + stride;
1600         }
1601     }
1602
1603     return image;
1604 }
1605
1606 #endif // wxUSE_IMAGE
1607
1608 wxCairoBitmapData::~wxCairoBitmapData()
1609 {
1610     if (m_pattern)
1611         cairo_pattern_destroy(m_pattern);
1612
1613     if (m_surface)
1614         cairo_surface_destroy(m_surface);
1615
1616     delete [] m_buffer;
1617 }
1618
1619 //-----------------------------------------------------------------------------
1620 // wxCairoContext implementation
1621 //-----------------------------------------------------------------------------
1622
1623 class wxCairoOffsetHelper
1624 {
1625 public :
1626     wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1627     {
1628         m_ctx = ctx;
1629         m_offset = offset;
1630         if ( m_offset )
1631              cairo_translate( m_ctx, 0.5, 0.5 );
1632     }
1633     ~wxCairoOffsetHelper( )
1634     {
1635         if ( m_offset )
1636             cairo_translate( m_ctx, -0.5, -0.5 );
1637     }
1638 public :
1639     cairo_t* m_ctx;
1640     bool m_offset;
1641 } ;
1642
1643 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1644 : wxGraphicsContext(renderer)
1645 {
1646 #ifdef __WXMSW__
1647     // wxMSW contexts always use MM_ANISOTROPIC, which messes up
1648     // text rendering when printing using Cairo. Switch it to MM_TEXT
1649     // map mode to avoid this problem.
1650     HDC hdc = (HDC)dc.GetHDC();
1651     ::SetMapMode(hdc, MM_TEXT);
1652     m_mswSurface = cairo_win32_printing_surface_create(hdc);
1653     Init( cairo_create(m_mswSurface) );
1654 #endif
1655
1656 #ifdef __WXGTK20__
1657     const wxDCImpl *impl = dc.GetImpl();
1658     Init( (cairo_t*) impl->GetCairoContext() );
1659 #endif
1660     wxSize sz = dc.GetSize();
1661     m_width = sz.x;
1662     m_height = sz.y;
1663
1664     wxPoint org = dc.GetDeviceOrigin();
1665     cairo_translate( m_context, org.x, org.y );
1666
1667     double sx,sy;
1668     dc.GetUserScale( &sx, &sy );
1669
1670 // TODO: Determine if these fixes are needed on other platforms too.
1671 // On MSW, without this the printer context will not respect wxDC SetMapMode calls.
1672 // For example, using dc.SetMapMode(wxMM_POINTS) can let us share printer and screen
1673 // drawing code
1674 #ifdef __WXMSW__
1675     double lsx,lsy;
1676     dc.GetLogicalScale( &lsx, &lsy );
1677     sx *= lsx;
1678     sy *= lsy;
1679 #endif
1680     cairo_scale( m_context, sx, sy );
1681
1682     org = dc.GetLogicalOrigin();
1683     cairo_translate( m_context, -org.x, -org.y );
1684 }
1685
1686 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1687 : wxGraphicsContext(renderer)
1688 {
1689     int width, height;
1690     dc.GetSize( &width, &height );
1691     m_width = width;
1692     m_height = height;
1693
1694     m_enableOffset = true;
1695
1696 #ifdef __WXMSW__
1697     m_mswSurface = cairo_win32_surface_create((HDC)dc.GetHDC());
1698     Init( cairo_create(m_mswSurface) );
1699 #endif
1700
1701 #ifdef __WXGTK3__
1702     cairo_t* cr = static_cast<cairo_t*>(dc.GetImpl()->GetCairoContext());
1703     if (cr)
1704         Init(cr);
1705 #elif defined __WXGTK20__
1706     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1707     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1708
1709 #if 0
1710     wxGraphicsMatrix matrix = CreateMatrix();
1711
1712     wxPoint org = dc.GetDeviceOrigin();
1713     matrix.Translate( org.x, org.y );
1714
1715     org = dc.GetLogicalOrigin();
1716     matrix.Translate( -org.x, -org.y );
1717
1718     double sx,sy;
1719     dc.GetUserScale( &sx, &sy );
1720     matrix.Scale( sx, sy );
1721
1722     ConcatTransform( matrix );
1723 #endif
1724 #endif
1725
1726 #ifdef __WXMAC__
1727     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1728     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1729     Init( cairo_create( surface ) );
1730     cairo_surface_destroy( surface );
1731 #endif
1732 }
1733
1734 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1735 : wxGraphicsContext(renderer)
1736 {
1737     int width, height;
1738     dc.GetSize( &width, &height );
1739     m_width = width;
1740     m_height = height;
1741
1742     m_enableOffset = true;
1743
1744 #ifdef __WXMSW__
1745
1746     HDC hdc = (HDC)dc.GetHDC();
1747
1748     HBITMAP bitmap = (HBITMAP)GetCurrentObject(hdc, OBJ_BITMAP);
1749
1750     BITMAP info;
1751     bool hasBitmap = false;
1752
1753     // cairo_win32_surface_create creates a 24-bit bitmap,
1754     // so if we have alpha, we need to create a 32-bit surface instead.
1755     if (!GetObject(bitmap, sizeof(info), &info) || info.bmBitsPixel < 32)
1756         m_mswSurface = cairo_win32_surface_create(hdc);
1757     else {
1758         hasBitmap = true;
1759         m_mswSurface = cairo_image_surface_create_for_data((unsigned char*)info.bmBits,
1760                                                CAIRO_FORMAT_ARGB32,
1761                                                info.bmWidth,
1762                                                info.bmHeight,
1763                                                info.bmWidthBytes);
1764     }
1765
1766     Init( cairo_create(m_mswSurface) );
1767     // If we've created a image surface, we need to flip the Y axis so that
1768     // all drawing will appear right side up.
1769     if (hasBitmap) {
1770         cairo_matrix_t matrix;
1771         cairo_matrix_init(&matrix, 1.0, 0.0, 0.0, -1.0, 0.0, height);
1772         cairo_set_matrix(m_context, &matrix);
1773     }
1774 #endif
1775
1776 #ifdef __WXGTK3__
1777     cairo_t* cr = static_cast<cairo_t*>(dc.GetImpl()->GetCairoContext());
1778     if (cr)
1779         Init(cr);
1780 #elif defined __WXGTK20__
1781     wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1782     Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1783
1784 #if 0
1785     wxGraphicsMatrix matrix = CreateMatrix();
1786
1787     wxPoint org = dc.GetDeviceOrigin();
1788     matrix.Translate( org.x, org.y );
1789
1790     org = dc.GetLogicalOrigin();
1791     matrix.Translate( -org.x, -org.y );
1792
1793     double sx,sy;
1794     dc.GetUserScale( &sx, &sy );
1795     matrix.Scale( sx, sy );
1796
1797     ConcatTransform( matrix );
1798 #endif
1799 #endif
1800
1801 #ifdef __WXMAC__
1802     CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1803     cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1804     Init( cairo_create( surface ) );
1805     cairo_surface_destroy( surface );
1806 #endif
1807 }
1808
1809 #ifdef __WXGTK20__
1810 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkWindow *window )
1811 : wxGraphicsContext(renderer)
1812 {
1813     Init( gdk_cairo_create( window ) );
1814
1815 #ifdef __WXGTK3__
1816     m_width = gdk_window_get_width(window);
1817     m_height = gdk_window_get_height(window);
1818 #else
1819     int width, height;
1820     gdk_drawable_get_size(window, &width, &height);
1821     m_width = width;
1822     m_height = height;
1823 #endif
1824 }
1825 #endif
1826
1827 #ifdef __WXMSW__
1828 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, HDC handle )
1829 : wxGraphicsContext(renderer)
1830 {
1831     m_mswSurface = cairo_win32_surface_create(handle);
1832     Init( cairo_create(m_mswSurface) );
1833     m_width =
1834     m_height = 0;
1835 }
1836 #endif
1837
1838
1839 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1840 : wxGraphicsContext(renderer)
1841 {
1842     Init( context );
1843     m_width =
1844     m_height = 0;
1845 }
1846
1847 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1848     : wxGraphicsContext(renderer)
1849 #ifdef __WXMSW__
1850     , m_mswWindowHDC(GetHwndOf(window))
1851 #endif
1852 {
1853     m_enableOffset = true;
1854 #ifdef __WXGTK__
1855     // something along these lines (copied from dcclient)
1856
1857     // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1858     // code should still be able to create wxClientDCs for them, so we will
1859     // use the parent window here then.
1860     if (window->m_wxwindow == NULL)
1861     {
1862         window = window->GetParent();
1863     }
1864
1865     wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1866
1867     Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1868
1869     wxSize sz = window->GetSize();
1870     m_width = sz.x;
1871     m_height = sz.y;
1872 #endif
1873
1874 #ifdef __WXMSW__
1875     m_mswSurface = cairo_win32_surface_create((HDC)m_mswWindowHDC);
1876     Init(cairo_create(m_mswSurface));
1877 #endif
1878
1879 }
1880
1881 wxCairoContext::wxCairoContext(wxGraphicsRenderer* renderer) :
1882     wxGraphicsContext(renderer)
1883 {
1884     m_context = NULL;
1885 }
1886
1887 wxCairoContext::~wxCairoContext()
1888 {
1889     if ( m_context )
1890     {
1891         PopState();
1892         PopState();
1893         cairo_destroy(m_context);
1894     }
1895 #ifdef __WXMSW__
1896     if ( m_mswSurface )
1897         cairo_surface_destroy(m_mswSurface);
1898 #endif
1899 }
1900
1901 void wxCairoContext::Init(cairo_t *context)
1902 {
1903     m_context = context ;
1904     PushState();
1905     PushState();
1906 }
1907
1908
1909 void wxCairoContext::Clip( const wxRegion& region )
1910 {
1911     // Create a path with all the rectangles in the region
1912     wxGraphicsPath path = GetRenderer()->CreatePath();
1913     wxRegionIterator ri(region);
1914     while (ri)
1915     {
1916         path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1917         ++ri;
1918     }
1919
1920     // Put it in the context
1921     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1922     cairo_append_path(m_context, cp);
1923
1924     // clip to that path
1925     cairo_clip(m_context);
1926     path.UnGetNativePath(cp);
1927 }
1928
1929 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1930 {
1931     // Create a path with this rectangle
1932     wxGraphicsPath path = GetRenderer()->CreatePath();
1933     path.AddRectangle(x,y,w,h);
1934
1935     // Put it in the context
1936     cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1937     cairo_append_path(m_context, cp);
1938
1939     // clip to that path
1940     cairo_clip(m_context);
1941     path.UnGetNativePath(cp);
1942 }
1943
1944 void wxCairoContext::ResetClip()
1945 {
1946     cairo_reset_clip(m_context);
1947 }
1948
1949
1950 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1951 {
1952     if ( !m_pen.IsNull() )
1953     {
1954         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1955         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1956         cairo_append_path(m_context,cp);
1957         ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1958         cairo_stroke(m_context);
1959         path.UnGetNativePath(cp);
1960     }
1961 }
1962
1963 void wxCairoContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1964 {
1965     if ( !m_brush.IsNull() )
1966     {
1967         wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1968         cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1969         cairo_append_path(m_context,cp);
1970         ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1971         cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1972         cairo_fill(m_context);
1973         path.UnGetNativePath(cp);
1974     }
1975 }
1976
1977 void wxCairoContext::Rotate( wxDouble angle )
1978 {
1979     cairo_rotate(m_context,angle);
1980 }
1981
1982 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1983 {
1984     cairo_translate(m_context,dx,dy);
1985 }
1986
1987 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1988 {
1989     cairo_scale(m_context,xScale,yScale);
1990 }
1991
1992 // concatenates this transform with the current transform of this context
1993 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1994 {
1995     cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1996 }
1997
1998 // sets the transform of this context
1999 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
2000 {
2001     cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
2002 }
2003
2004 // gets the matrix of this context
2005 wxGraphicsMatrix wxCairoContext::GetTransform() const
2006 {
2007     wxGraphicsMatrix matrix = CreateMatrix();
2008     cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
2009     return matrix;
2010 }
2011
2012
2013
2014 void wxCairoContext::PushState()
2015 {
2016     cairo_save(m_context);
2017 }
2018
2019 void wxCairoContext::PopState()
2020 {
2021     cairo_restore(m_context);
2022 }
2023
2024 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
2025 {
2026     wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp);
2027     DrawBitmap(bitmap, x, y, w, h);
2028
2029 }
2030
2031 void wxCairoContext::DrawBitmap(const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
2032 {
2033     PushState();
2034
2035     // In case we're scaling the image by using a width and height different
2036     // than the bitmap's size create a pattern transformation on the surface and
2037     // draw the transformed pattern.
2038     wxCairoBitmapData* data = static_cast<wxCairoBitmapData*>(bmp.GetRefData());
2039     cairo_pattern_t* pattern = data->GetCairoPattern();
2040     wxSize size = data->GetSize();
2041
2042     wxDouble scaleX = w / size.GetWidth();
2043     wxDouble scaleY = h / size.GetHeight();
2044
2045     // prepare to draw the image
2046     cairo_translate(m_context, x, y);
2047     cairo_scale(m_context, scaleX, scaleY);
2048     cairo_set_source(m_context, pattern);
2049     // use the original size here since the context is scaled already...
2050     cairo_rectangle(m_context, 0, 0, size.GetWidth(), size.GetHeight());
2051     // fill the rectangle using the pattern
2052     cairo_fill(m_context);
2053
2054     PopState();
2055 }
2056
2057 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
2058 {
2059     // An icon is a bitmap on wxGTK, so do this the easy way.  When we want to
2060     // start using the Cairo backend on other platforms then we may need to
2061     // fiddle with this...
2062     DrawBitmap(icon, x, y, w, h);
2063 }
2064
2065
2066 void wxCairoContext::DoDrawText(const wxString& str, wxDouble x, wxDouble y)
2067 {
2068     wxCHECK_RET( !m_font.IsNull(),
2069                  wxT("wxCairoContext::DrawText - no valid font set") );
2070
2071     if ( str.empty())
2072         return;
2073
2074     const wxCharBuffer data = str.utf8_str();
2075     if ( !data )
2076         return;
2077
2078     if ( ((wxCairoFontData*)m_font.GetRefData())->Apply(this) )
2079     {
2080 #ifdef __WXGTK__
2081         PangoLayout *layout = pango_cairo_create_layout (m_context);
2082         const wxFont& font = static_cast<wxCairoFontData*>(m_font.GetRefData())->GetFont();
2083         pango_layout_set_font_description(layout, font.GetNativeFontInfo()->description);
2084         pango_layout_set_text(layout, data, data.length());
2085         font.GTKSetPangoAttrs(layout);
2086
2087         cairo_move_to(m_context, x, y);
2088         pango_cairo_show_layout (m_context, layout);
2089
2090         g_object_unref (layout);
2091
2092         // Don't use Cairo text API, we already did everything.
2093         return;
2094 #endif
2095     }
2096
2097     // Cairo's x,y for drawing text is at the baseline, so we need to adjust
2098     // the position we move to by the ascent.
2099     cairo_font_extents_t fe;
2100     cairo_font_extents(m_context, &fe);
2101     cairo_move_to(m_context, x, y+fe.ascent);
2102
2103     cairo_show_text(m_context, data);
2104 }
2105
2106 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
2107                                     wxDouble *descent, wxDouble *externalLeading ) const
2108 {
2109     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
2110
2111     if ( width )
2112         *width = 0;
2113     if ( height )
2114         *height = 0;
2115     if ( descent )
2116         *descent = 0;
2117     if ( externalLeading )
2118         *externalLeading = 0;
2119
2120     if ( str.empty())
2121         return;
2122
2123     if ( ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this) )
2124     {
2125 #ifdef __WXGTK__
2126         int w, h;
2127
2128         PangoLayout *layout = pango_cairo_create_layout (m_context);
2129         const wxFont& font = static_cast<wxCairoFontData*>(m_font.GetRefData())->GetFont();
2130         pango_layout_set_font_description(layout, font.GetNativeFontInfo()->description);
2131         const wxCharBuffer data = str.utf8_str();
2132         if ( !data )
2133         {
2134             return;
2135         }
2136         pango_layout_set_text(layout, data, data.length());
2137         pango_layout_get_pixel_size (layout, &w, &h);
2138         if ( width )
2139             *width = w;
2140         if ( height )
2141             *height = h;
2142         if (descent)
2143         {
2144             PangoLayoutIter *iter = pango_layout_get_iter(layout);
2145             int baseline = pango_layout_iter_get_baseline(iter);
2146             pango_layout_iter_free(iter);
2147             *descent = h - PANGO_PIXELS(baseline);
2148         }
2149         g_object_unref (layout);
2150         return;
2151 #endif
2152     }
2153
2154     if (width)
2155     {
2156         const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
2157         cairo_text_extents_t te;
2158         cairo_text_extents(m_context, buf, &te);
2159         *width = te.width;
2160     }
2161
2162     if (height || descent || externalLeading)
2163     {
2164         cairo_font_extents_t fe;
2165         cairo_font_extents(m_context, &fe);
2166
2167         // some backends have negative descents
2168
2169         if ( fe.descent < 0 )
2170             fe.descent = -fe.descent;
2171
2172         if ( fe.height < (fe.ascent + fe.descent ) )
2173         {
2174             // some backends are broken re height ... (eg currently ATSUI)
2175             fe.height = fe.ascent + fe.descent;
2176         }
2177
2178         if (height)
2179             *height = fe.height;
2180         if ( descent )
2181             *descent = fe.descent;
2182         if ( externalLeading )
2183             *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
2184     }
2185 }
2186
2187 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
2188 {
2189     widths.Empty();
2190     wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
2191 #ifdef __WXGTK__
2192     const wxCharBuffer data = text.utf8_str();
2193     int w = 0;
2194     if (data.length())
2195     {
2196         PangoLayout* layout = pango_cairo_create_layout(m_context);
2197         const wxFont& font = static_cast<wxCairoFontData*>(m_font.GetRefData())->GetFont();
2198         pango_layout_set_font_description(layout, font.GetNativeFontInfo()->description);
2199         pango_layout_set_text(layout, data, data.length());
2200         PangoLayoutIter* iter = pango_layout_get_iter(layout);
2201         PangoRectangle rect;
2202         do {
2203             pango_layout_iter_get_cluster_extents(iter, NULL, &rect);
2204             w += rect.width;
2205             widths.Add(PANGO_PIXELS(w));
2206         } while (pango_layout_iter_next_cluster(iter));
2207         pango_layout_iter_free(iter);
2208         g_object_unref(layout);
2209     }
2210     size_t i = widths.GetCount();
2211     const size_t len = text.length();
2212     while (i++ < len)
2213         widths.Add(PANGO_PIXELS(w));
2214 #else
2215     // TODO
2216 #endif
2217 }
2218
2219 void * wxCairoContext::GetNativeContext()
2220 {
2221     return m_context;
2222 }
2223
2224 bool wxCairoContext::SetAntialiasMode(wxAntialiasMode antialias)
2225 {
2226     if (m_antialias == antialias)
2227         return true;
2228
2229     m_antialias = antialias;
2230
2231     cairo_antialias_t antialiasMode;
2232     switch (antialias)
2233     {
2234         case wxANTIALIAS_DEFAULT:
2235             antialiasMode = CAIRO_ANTIALIAS_DEFAULT;
2236             break;
2237         case wxANTIALIAS_NONE:
2238             antialiasMode = CAIRO_ANTIALIAS_NONE;
2239             break;
2240         default:
2241             return false;
2242     }
2243     cairo_set_antialias(m_context, antialiasMode);
2244     return true;
2245 }
2246
2247 bool wxCairoContext::SetInterpolationQuality(wxInterpolationQuality WXUNUSED(interpolation))
2248 {
2249     // placeholder
2250     return false;
2251 }
2252
2253 bool wxCairoContext::SetCompositionMode(wxCompositionMode op)
2254 {
2255     if ( m_composition == op )
2256         return true;
2257
2258     m_composition = op;
2259     cairo_operator_t cop;
2260     switch (op)
2261     {
2262         case wxCOMPOSITION_CLEAR:
2263             cop = CAIRO_OPERATOR_CLEAR;
2264             break;
2265         case wxCOMPOSITION_SOURCE:
2266             cop = CAIRO_OPERATOR_SOURCE;
2267             break;
2268         case wxCOMPOSITION_OVER:
2269             cop = CAIRO_OPERATOR_OVER;
2270             break;
2271         case wxCOMPOSITION_IN:
2272             cop = CAIRO_OPERATOR_IN;
2273             break;
2274         case wxCOMPOSITION_OUT:
2275             cop = CAIRO_OPERATOR_OUT;
2276             break;
2277         case wxCOMPOSITION_ATOP:
2278             cop = CAIRO_OPERATOR_ATOP;
2279             break;
2280         case wxCOMPOSITION_DEST:
2281             cop = CAIRO_OPERATOR_DEST;
2282             break;
2283         case wxCOMPOSITION_DEST_OVER:
2284             cop = CAIRO_OPERATOR_DEST_OVER;
2285             break;
2286         case wxCOMPOSITION_DEST_IN:
2287             cop = CAIRO_OPERATOR_DEST_IN;
2288             break;
2289         case wxCOMPOSITION_DEST_OUT:
2290             cop = CAIRO_OPERATOR_DEST_OUT;
2291             break;
2292         case wxCOMPOSITION_DEST_ATOP:
2293             cop = CAIRO_OPERATOR_DEST_ATOP;
2294             break;
2295         case wxCOMPOSITION_XOR:
2296             cop = CAIRO_OPERATOR_XOR;
2297             break;
2298         case wxCOMPOSITION_ADD:
2299             cop = CAIRO_OPERATOR_ADD;
2300             break;
2301         default:
2302             return false;
2303     }
2304     cairo_set_operator(m_context, cop);
2305     return true;
2306 }
2307
2308 void wxCairoContext::BeginLayer(wxDouble opacity)
2309 {
2310     m_layerOpacities.push_back(opacity);
2311     cairo_push_group(m_context);
2312 }
2313
2314 void wxCairoContext::EndLayer()
2315 {
2316     float opacity = m_layerOpacities.back();
2317     m_layerOpacities.pop_back();
2318     cairo_pop_group_to_source(m_context);
2319     cairo_paint_with_alpha(m_context,opacity);
2320 }
2321
2322 //-----------------------------------------------------------------------------
2323 // wxCairoRenderer declaration
2324 //-----------------------------------------------------------------------------
2325
2326 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
2327 {
2328 public :
2329     wxCairoRenderer() {}
2330
2331     virtual ~wxCairoRenderer() {}
2332
2333     // Context
2334
2335     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
2336     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
2337     virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
2338
2339     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
2340
2341     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
2342 #if wxUSE_IMAGE
2343     virtual wxGraphicsContext * CreateContextFromImage(wxImage& image);
2344 #endif // wxUSE_IMAGE
2345
2346     virtual wxGraphicsContext * CreateContext( wxWindow* window );
2347
2348     virtual wxGraphicsContext * CreateMeasuringContext();
2349 #ifdef __WXMSW__
2350 #if wxUSE_ENH_METAFILE
2351     virtual wxGraphicsContext * CreateContext( const wxEnhMetaFileDC& dc);
2352 #endif
2353 #endif
2354     // Path
2355
2356     virtual wxGraphicsPath CreatePath();
2357
2358     // Matrix
2359
2360     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
2361         wxDouble tx=0.0, wxDouble ty=0.0);
2362
2363
2364     virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
2365
2366     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
2367
2368     virtual wxGraphicsBrush
2369     CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2370                               wxDouble x2, wxDouble y2,
2371                               const wxGraphicsGradientStops& stops);
2372
2373     virtual wxGraphicsBrush
2374     CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2375                               wxDouble xc, wxDouble yc,
2376                               wxDouble radius,
2377                               const wxGraphicsGradientStops& stops);
2378
2379     // sets the font
2380     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
2381     virtual wxGraphicsFont CreateFont(double sizeInPixels,
2382                                       const wxString& facename,
2383                                       int flags = wxFONTFLAG_DEFAULT,
2384                                       const wxColour& col = *wxBLACK);
2385
2386     // create a native bitmap representation
2387     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap );
2388 #if wxUSE_IMAGE
2389     virtual wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image);
2390     virtual wxImage CreateImageFromBitmap(const wxGraphicsBitmap& bmp);
2391 #endif // wxUSE_IMAGE
2392
2393     // create a graphics bitmap from a native bitmap
2394     virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
2395
2396     // create a subimage from a native image representation
2397     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  );
2398
2399     DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
2400 } ;
2401
2402 //-----------------------------------------------------------------------------
2403 // wxCairoRenderer implementation
2404 //-----------------------------------------------------------------------------
2405
2406 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
2407
2408 static wxCairoRenderer gs_cairoGraphicsRenderer;
2409
2410 #ifdef __WXGTK__
2411     #define ENSURE_LOADED_OR_RETURN(returnOnFail)
2412 #else
2413     #define ENSURE_LOADED_OR_RETURN(returnOnFail)  \
2414         if (!wxCairoInit())                        \
2415             return returnOnFail
2416 #endif
2417
2418 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
2419 {
2420     ENSURE_LOADED_OR_RETURN(NULL);
2421     return new wxCairoContext(this,dc);
2422 }
2423
2424 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
2425 {
2426     ENSURE_LOADED_OR_RETURN(NULL);
2427     return new wxCairoContext(this,dc);
2428 }
2429
2430 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
2431 {
2432     ENSURE_LOADED_OR_RETURN(NULL);
2433     return new wxCairoContext(this, dc);
2434 }
2435
2436 #ifdef __WXMSW__
2437 #if wxUSE_ENH_METAFILE
2438 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxEnhMetaFileDC& WXUNUSED(dc) )
2439 {
2440     return NULL;
2441 }
2442 #endif
2443 #endif
2444
2445 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
2446 {
2447     ENSURE_LOADED_OR_RETURN(NULL);
2448 #ifdef __WXMSW__
2449     return new wxCairoContext(this,(HDC)context);
2450 #else
2451     return new wxCairoContext(this,(cairo_t*)context);
2452 #endif
2453 }
2454
2455
2456 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
2457 {
2458 #ifdef __WXGTK__
2459     return new wxCairoContext(this, static_cast<GdkWindow*>(window));
2460 #else
2461     wxUnusedVar(window);
2462     return NULL;
2463 #endif
2464 }
2465
2466 #if wxUSE_IMAGE
2467 wxGraphicsContext * wxCairoRenderer::CreateContextFromImage(wxImage& image)
2468 {
2469     ENSURE_LOADED_OR_RETURN(NULL);
2470     return new wxCairoImageContext(this, image);
2471 }
2472 #endif // wxUSE_IMAGE
2473
2474 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
2475 {
2476 #ifdef __WXGTK__
2477     return CreateContextFromNativeWindow(gdk_get_default_root_window());
2478 #else
2479     return NULL;
2480     // TODO
2481 #endif
2482 }
2483
2484 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
2485 {
2486     ENSURE_LOADED_OR_RETURN(NULL);
2487     return new wxCairoContext(this, window );
2488 }
2489
2490 // Path
2491
2492 wxGraphicsPath wxCairoRenderer::CreatePath()
2493 {
2494     wxGraphicsPath path;
2495     ENSURE_LOADED_OR_RETURN(path);
2496     path.SetRefData( new wxCairoPathData(this) );
2497     return path;
2498 }
2499
2500
2501 // Matrix
2502
2503 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
2504                                                 wxDouble tx, wxDouble ty)
2505
2506 {
2507     wxGraphicsMatrix m;
2508     ENSURE_LOADED_OR_RETURN(m);
2509     wxCairoMatrixData* data = new wxCairoMatrixData( this );
2510     data->Set( a,b,c,d,tx,ty ) ;
2511     m.SetRefData(data);
2512     return m;
2513 }
2514
2515 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
2516 {
2517     wxGraphicsPen p;
2518     ENSURE_LOADED_OR_RETURN(p);
2519     if (pen.IsOk() && pen.GetStyle() != wxPENSTYLE_TRANSPARENT)
2520     {
2521         p.SetRefData(new wxCairoPenData( this, pen ));
2522     }
2523     return p;
2524 }
2525
2526 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
2527 {
2528     wxGraphicsBrush p;
2529     ENSURE_LOADED_OR_RETURN(p);
2530     if (brush.IsOk() && brush.GetStyle() != wxBRUSHSTYLE_TRANSPARENT)
2531     {
2532         p.SetRefData(new wxCairoBrushData( this, brush ));
2533     }
2534     return p;
2535 }
2536
2537 wxGraphicsBrush
2538 wxCairoRenderer::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
2539                                            wxDouble x2, wxDouble y2,
2540                                            const wxGraphicsGradientStops& stops)
2541 {
2542     wxGraphicsBrush p;
2543     ENSURE_LOADED_OR_RETURN(p);
2544     wxCairoBrushData* d = new wxCairoBrushData( this );
2545     d->CreateLinearGradientBrush(x1, y1, x2, y2, stops);
2546     p.SetRefData(d);
2547     return p;
2548 }
2549
2550 wxGraphicsBrush
2551 wxCairoRenderer::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
2552                                            wxDouble xc, wxDouble yc, wxDouble r,
2553                                            const wxGraphicsGradientStops& stops)
2554 {
2555     wxGraphicsBrush p;
2556     ENSURE_LOADED_OR_RETURN(p);
2557     wxCairoBrushData* d = new wxCairoBrushData( this );
2558     d->CreateRadialGradientBrush(xo, yo, xc, yc, r, stops);
2559     p.SetRefData(d);
2560     return p;
2561 }
2562
2563 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
2564 {
2565     wxGraphicsFont p;
2566     ENSURE_LOADED_OR_RETURN(p);
2567     if ( font.IsOk() )
2568     {
2569         p.SetRefData(new wxCairoFontData( this , font, col ));
2570     }
2571     return p;
2572 }
2573
2574 wxGraphicsFont
2575 wxCairoRenderer::CreateFont(double sizeInPixels,
2576                             const wxString& facename,
2577                             int flags,
2578                             const wxColour& col)
2579 {
2580     wxGraphicsFont font;
2581     ENSURE_LOADED_OR_RETURN(font);
2582     font.SetRefData(new wxCairoFontData(this, sizeInPixels, facename, flags, col));
2583     return font;
2584 }
2585
2586 wxGraphicsBitmap wxCairoRenderer::CreateBitmap( const wxBitmap& bmp )
2587 {
2588     wxGraphicsBitmap p;
2589     ENSURE_LOADED_OR_RETURN(p);
2590     if ( bmp.IsOk() )
2591     {
2592         p.SetRefData(new wxCairoBitmapData( this , bmp ));
2593     }
2594     return p;
2595 }
2596
2597 #if wxUSE_IMAGE
2598
2599 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromImage(const wxImage& image)
2600 {
2601     wxGraphicsBitmap bmp;
2602
2603     ENSURE_LOADED_OR_RETURN(bmp);
2604
2605     if ( image.IsOk() )
2606     {
2607         bmp.SetRefData(new wxCairoBitmapData(this, image));
2608     }
2609
2610     return bmp;
2611 }
2612
2613 wxImage wxCairoRenderer::CreateImageFromBitmap(const wxGraphicsBitmap& bmp)
2614 {
2615     wxImage image;
2616     ENSURE_LOADED_OR_RETURN(image);
2617
2618     const wxCairoBitmapData* const
2619         data = static_cast<wxCairoBitmapData*>(bmp.GetGraphicsData());
2620     if (data)
2621         image = data->ConvertToImage();
2622
2623     return image;
2624 }
2625
2626 #endif // wxUSE_IMAGE
2627
2628
2629 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromNativeBitmap( void* bitmap )
2630 {
2631     wxGraphicsBitmap p;
2632     ENSURE_LOADED_OR_RETURN(p);
2633     if ( bitmap != NULL )
2634     {
2635         p.SetRefData(new wxCairoBitmapData( this , (cairo_surface_t*) bitmap ));
2636     }
2637     return p;
2638 }
2639
2640 wxGraphicsBitmap
2641 wxCairoRenderer::CreateSubBitmap(const wxGraphicsBitmap& WXUNUSED(bitmap),
2642                                  wxDouble WXUNUSED(x),
2643                                  wxDouble WXUNUSED(y),
2644                                  wxDouble WXUNUSED(w),
2645                                  wxDouble WXUNUSED(h))
2646 {
2647     wxGraphicsBitmap p;
2648     wxFAIL_MSG("wxCairoRenderer::CreateSubBitmap is not implemented.");
2649     return p;
2650 }
2651
2652 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2653 {
2654     return &gs_cairoGraphicsRenderer;
2655 }
2656
2657 #else // !wxUSE_CAIRO
2658
2659 wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer()
2660 {
2661     return NULL;
2662 }
2663
2664 #endif  // wxUSE_CAIRO/!wxUSE_CAIRO
2665
2666 // MSW and OS X have their own native default renderers, but the other ports
2667 // use Cairo by default
2668 #if !(defined(__WXMSW__) || defined(__WXOSX__))
2669 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
2670 {
2671     return GetCairoRenderer();
2672 }
2673 #endif // !(__WXMSW__ || __WXOSX__)
2674
2675 #endif // wxUSE_GRAPHICS_CONTEXT