]> git.saurik.com Git - wxWidgets.git/blob - src/generic/graphicc.cpp
projects / wxWidgets.git / blob
? search:


50965a5b998ac4ba99c7a93fcb8d9a7335d1cd17
[wxWidgets.git] / src / generic / graphicc.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/generic/graphicc.cpp
3 // Purpose: cairo device context class
4 // Author: Stefan Csomor
5 // Modified by:
6 // Created: 2006-10-03
7 // RCS-ID: $Id$
8 // Copyright: (c) 2006 Stefan Csomor
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 #include "wx/wxprec.h"
13
14 #ifdef __BORLANDC__
15 #pragma hdrstop
16 #endif
17
18 #if wxUSE_GRAPHICS_CONTEXT
19
20 #include "wx/graphics.h"
21
22 #ifndef WX_PRECOMP
23 #include "wx/bitmap.h"
24 #include "wx/icon.h"
25 #include "wx/dcclient.h"
26 #include "wx/dcmemory.h"
27 #include "wx/dcprint.h"
28 #endif
29
30 #include "wx/private/graphics.h"
31 #include "wx/rawbmp.h"
32 #include "wx/vector.h"
33
34 using namespace std;
35
36 //-----------------------------------------------------------------------------
37 // device context implementation
38 //
39 // more and more of the dc functionality should be implemented by calling
40 // the appropricate wxCairoContext, but we will have to do that step by step
41 // also coordinate conversions should be moved to native matrix ops
42 //-----------------------------------------------------------------------------
43
44 // we always stock two context states, one at entry, to be able to preserve the
45 // state we were called with, the other one after changing to HI Graphics orientation
46 // (this one is used for getting back clippings etc)
47
48 //-----------------------------------------------------------------------------
49 // wxGraphicsPath implementation
50 //-----------------------------------------------------------------------------
51
52 // TODO remove this dependency (gdiplus needs the macros)
53
54 #ifndef max
55 #define max(a,b) (((a) > (b)) ? (a) : (b))
56 #endif
57
58 #ifndef min
59 #define min(a,b) (((a) < (b)) ? (a) : (b))
60 #endif
61
62 #include <cairo.h>
63 #ifdef __WXGTK__
64 #include <gtk/gtk.h>
65 #include "wx/fontutil.h"
66 #include "wx/gtk/dc.h"
67 #endif
68
69 #ifdef __WXMSW__
70 #include <cairo-win32.h>
71 #endif
72
73 #ifdef __WXMAC__
74 #include "wx/osx/private.h"
75 #include <cairo-quartz.h>
76 #include <cairo-atsui.h>
77 #endif
78
79 class WXDLLIMPEXP_CORE wxCairoPathData : public wxGraphicsPathData
80 {
81 public :
82 wxCairoPathData(wxGraphicsRenderer* renderer, cairo_t* path = NULL);
83 ~wxCairoPathData();
84
85 virtual wxGraphicsObjectRefData *Clone() const;
86
87 //
88 // These are the path primitives from which everything else can be constructed
89 //
90
91 // begins a new subpath at (x,y)
92 virtual void MoveToPoint( wxDouble x, wxDouble y );
93
94 // adds a straight line from the current point to (x,y)
95 virtual void AddLineToPoint( wxDouble x, wxDouble y );
96
97 // adds a cubic Bezier curve from the current point, using two control points and an end point
98 virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
99
100
101 // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
102 virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
103
104 // gets the last point of the current path, (0,0) if not yet set
105 virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
106
107 // adds another path
108 virtual void AddPath( const wxGraphicsPathData* path );
109
110 // closes the current sub-path
111 virtual void CloseSubpath();
112
113 //
114 // These are convenience functions which - if not available natively will be assembled
115 // using the primitives from above
116 //
117
118 /*
119
120 // appends a rectangle as a new closed subpath
121 virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) ;
122 // appends an ellipsis as a new closed subpath fitting the passed rectangle
123 virtual void AddEllipsis( wxDouble x, wxDouble y, wxDouble w , wxDouble h ) ;
124
125 // draws a an arc to two tangents connecting (current) to (x1,y1) and (x1,y1) to (x2,y2), also a straight line from (current) to (x1,y1)
126 virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r ) ;
127 */
128
129 // returns the native path
130 virtual void * GetNativePath() const ;
131
132 // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
133 virtual void UnGetNativePath(void *p) const;
134
135 // transforms each point of this path by the matrix
136 virtual void Transform( const wxGraphicsMatrixData* matrix ) ;
137
138 // gets the bounding box enclosing all points (possibly including control points)
139 virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
140
141 virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxWINDING_RULE) const;
142
143 private :
144 cairo_t* m_pathContext;
145 };
146
147 class WXDLLIMPEXP_CORE wxCairoMatrixData : public wxGraphicsMatrixData
148 {
149 public :
150 wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix = NULL ) ;
151 virtual ~wxCairoMatrixData() ;
152
153 virtual wxGraphicsObjectRefData *Clone() const ;
154
155 // concatenates the matrix
156 virtual void Concat( const wxGraphicsMatrixData *t );
157
158 // sets the matrix to the respective values
159 virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
160 wxDouble tx=0.0, wxDouble ty=0.0);
161
162 // gets the component valuess of the matrix
163 virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL, wxDouble* c=NULL,
164 wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
165
166 // makes this the inverse matrix
167 virtual void Invert();
168
169 // returns true if the elements of the transformation matrix are equal ?
170 virtual bool IsEqual( const wxGraphicsMatrixData* t) const ;
171
172 // return true if this is the identity matrix
173 virtual bool IsIdentity() const;
174
175 //
176 // transformation
177 //
178
179 // add the translation to this matrix
180 virtual void Translate( wxDouble dx , wxDouble dy );
181
182 // add the scale to this matrix
183 virtual void Scale( wxDouble xScale , wxDouble yScale );
184
185 // add the rotation to this matrix (radians)
186 virtual void Rotate( wxDouble angle );
187
188 //
189 // apply the transforms
190 //
191
192 // applies that matrix to the point
193 virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
194
195 // applies the matrix except for translations
196 virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
197
198 // returns the native representation
199 virtual void * GetNativeMatrix() const;
200 private:
201 cairo_matrix_t m_matrix ;
202 } ;
203
204 class WXDLLIMPEXP_CORE wxCairoPenData : public wxGraphicsObjectRefData
205 {
206 public:
207 wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen );
208 ~wxCairoPenData();
209
210 void Init();
211
212 virtual void Apply( wxGraphicsContext* context );
213 virtual wxDouble GetWidth() { return m_width; }
214
215 private :
216 double m_width;
217
218 double m_red;
219 double m_green;
220 double m_blue;
221 double m_alpha;
222
223 cairo_line_cap_t m_cap;
224 cairo_line_join_t m_join;
225
226 int m_count;
227 const double *m_lengths;
228 double *m_userLengths;
229
230 wxPen m_pen;
231
232 wxDECLARE_NO_COPY_CLASS(wxCairoPenData);
233 };
234
235 class WXDLLIMPEXP_CORE wxCairoBrushData : public wxGraphicsObjectRefData
236 {
237 public:
238 wxCairoBrushData( wxGraphicsRenderer* renderer );
239 wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush );
240 ~wxCairoBrushData ();
241
242 virtual void Apply( wxGraphicsContext* context );
243 void CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
244 const wxColour&c1, const wxColour&c2 );
245 void CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
246 const wxColour &oColor, const wxColour &cColor );
247
248 protected:
249 virtual void Init();
250
251 private :
252 double m_red;
253 double m_green;
254 double m_blue;
255 double m_alpha;
256
257 cairo_pattern_t* m_brushPattern;
258 };
259
260 class wxCairoFontData : public wxGraphicsObjectRefData
261 {
262 public:
263 wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col );
264 ~wxCairoFontData();
265
266 virtual void Apply( wxGraphicsContext* context );
267 #ifdef __WXGTK__
268 const PangoFontDescription* GetFont() const { return m_font; }
269 bool GetUnderlined() const { return m_underlined; }
270 #endif
271 private :
272 double m_size;
273 bool m_underlined;
274 double m_red;
275 double m_green;
276 double m_blue;
277 double m_alpha;
278 #ifdef __WXMAC__
279 cairo_font_face_t *m_font;
280 #elif defined(__WXGTK__)
281 PangoFontDescription* m_font;
282 #else
283 wxCharBuffer m_fontName;
284 cairo_font_slant_t m_slant;
285 cairo_font_weight_t m_weight;
286 #endif
287 };
288
289 class wxCairoBitmapData : public wxGraphicsObjectRefData
290 {
291 public:
292 wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp );
293 wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap );
294 ~wxCairoBitmapData();
295
296 virtual cairo_surface_t* GetCairoSurface() { return m_surface; }
297 virtual cairo_pattern_t* GetCairoPattern() { return m_pattern; }
298 virtual wxSize GetSize() { return wxSize(m_width, m_height); }
299 private :
300 cairo_surface_t* m_surface;
301 cairo_pattern_t* m_pattern;
302 int m_width;
303 int m_height;
304 unsigned char* m_buffer;
305 };
306
307 class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext
308 {
309 public:
310 wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc );
311 wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc );
312 wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc );
313 #ifdef __WXGTK__
314 wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable );
315 #endif
316 wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context );
317 wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window);
318 wxCairoContext();
319 virtual ~wxCairoContext();
320
321 virtual bool ShouldOffset() const
322 {
323 int penwidth = 0 ;
324 if ( !m_pen.IsNull() )
325 {
326 penwidth = (int)((wxCairoPenData*)m_pen.GetRefData())->GetWidth();
327 if ( penwidth == 0 )
328 penwidth = 1;
329 }
330 return ( penwidth % 2 ) == 1;
331 }
332
333 virtual void Clip( const wxRegion &region );
334
335 // clips drawings to the rect
336 virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
337
338 // resets the clipping to original extent
339 virtual void ResetClip();
340
341 virtual void * GetNativeContext();
342
343 virtual bool SetAntialiasMode(wxAntialiasMode antialias);
344
345 virtual bool SetCompositionMode(wxCompositionMode op);
346
347 virtual void BeginLayer(wxDouble opacity);
348
349 virtual void EndLayer();
350
351 virtual void StrokePath( const wxGraphicsPath& p );
352 virtual void FillPath( const wxGraphicsPath& p , wxPolygonFillMode fillStyle = wxWINDING_RULE );
353
354 virtual void Translate( wxDouble dx , wxDouble dy );
355 virtual void Scale( wxDouble xScale , wxDouble yScale );
356 virtual void Rotate( wxDouble angle );
357
358 // concatenates this transform with the current transform of this context
359 virtual void ConcatTransform( const wxGraphicsMatrix& matrix );
360
361 // sets the transform of this context
362 virtual void SetTransform( const wxGraphicsMatrix& matrix );
363
364 // gets the matrix of this context
365 virtual wxGraphicsMatrix GetTransform() const;
366
367 virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
368 virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
369 virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
370 virtual void PushState();
371 virtual void PopState();
372
373 virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
374 wxDouble *descent, wxDouble *externalLeading ) const;
375 virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
376
377 protected:
378 virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
379
380 private:
381 void Init(cairo_t *context);
382
383 cairo_t* m_context;
384
385 wxVector<float> m_layerOpacities;
386
387 wxDECLARE_NO_COPY_CLASS(wxCairoContext);
388 };
389
390 //-----------------------------------------------------------------------------
391 // wxCairoPenData implementation
392 //-----------------------------------------------------------------------------
393
394 wxCairoPenData::~wxCairoPenData()
395 {
396 delete[] m_userLengths;
397 }
398
399 void wxCairoPenData::Init()
400 {
401 m_lengths = NULL;
402 m_userLengths = NULL;
403 m_width = 0;
404 m_count = 0;
405 }
406
407 wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen )
408 : wxGraphicsObjectRefData(renderer)
409 {
410 Init();
411 m_pen = pen;
412 m_width = m_pen.GetWidth();
413 if (m_width <= 0.0)
414 m_width = 0.1;
415
416 m_red = m_pen.GetColour().Red()/255.0;
417 m_green = m_pen.GetColour().Green()/255.0;
418 m_blue = m_pen.GetColour().Blue()/255.0;
419 m_alpha = m_pen.GetColour().Alpha()/255.0;
420
421 switch ( m_pen.GetCap() )
422 {
423 case wxCAP_ROUND :
424 m_cap = CAIRO_LINE_CAP_ROUND;
425 break;
426
427 case wxCAP_PROJECTING :
428 m_cap = CAIRO_LINE_CAP_SQUARE;
429 break;
430
431 case wxCAP_BUTT :
432 m_cap = CAIRO_LINE_CAP_BUTT;
433 break;
434
435 default :
436 m_cap = CAIRO_LINE_CAP_BUTT;
437 break;
438 }
439
440 switch ( m_pen.GetJoin() )
441 {
442 case wxJOIN_BEVEL :
443 m_join = CAIRO_LINE_JOIN_BEVEL;
444 break;
445
446 case wxJOIN_MITER :
447 m_join = CAIRO_LINE_JOIN_MITER;
448 break;
449
450 case wxJOIN_ROUND :
451 m_join = CAIRO_LINE_JOIN_ROUND;
452 break;
453
454 default :
455 m_join = CAIRO_LINE_JOIN_MITER;
456 break;
457 }
458
459 const double dashUnit = m_width < 1.0 ? 1.0 : m_width;
460 const double dotted[] =
461 {
462 dashUnit , dashUnit + 2.0
463 };
464 static const double short_dashed[] =
465 {
466 9.0 , 6.0
467 };
468 static const double dashed[] =
469 {
470 19.0 , 9.0
471 };
472 static const double dotted_dashed[] =
473 {
474 9.0 , 6.0 , 3.0 , 3.0
475 };
476
477 switch ( m_pen.GetStyle() )
478 {
479 case wxPENSTYLE_SOLID :
480 break;
481
482 case wxPENSTYLE_DOT :
483 m_count = WXSIZEOF(dotted);
484 m_userLengths = new double[ m_count ] ;
485 memcpy( m_userLengths, dotted, sizeof(dotted) );
486 m_lengths = m_userLengths;
487 break;
488
489 case wxPENSTYLE_LONG_DASH :
490 m_lengths = dashed ;
491 m_count = WXSIZEOF(dashed);
492 break;
493
494 case wxPENSTYLE_SHORT_DASH :
495 m_lengths = short_dashed ;
496 m_count = WXSIZEOF(short_dashed);
497 break;
498
499 case wxPENSTYLE_DOT_DASH :
500 m_lengths = dotted_dashed ;
501 m_count = WXSIZEOF(dotted_dashed);
502 break;
503
504 case wxPENSTYLE_USER_DASH :
505 {
506 wxDash *wxdashes ;
507 m_count = m_pen.GetDashes( &wxdashes ) ;
508 if ((wxdashes != NULL) && (m_count > 0))
509 {
510 m_userLengths = new double[m_count] ;
511 for ( int i = 0 ; i < m_count ; ++i )
512 {
513 m_userLengths[i] = wxdashes[i] * dashUnit ;
514
515 if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 )
516 m_userLengths[i] = dashUnit + 2.0 ;
517 else if ( i % 2 == 0 && m_userLengths[i] < dashUnit )
518 m_userLengths[i] = dashUnit ;
519 }
520 }
521 m_lengths = m_userLengths ;
522 }
523 break;
524 case wxPENSTYLE_STIPPLE :
525 {
526 /*
527 wxBitmap* bmp = pen.GetStipple();
528 if ( bmp && bmp->Ok() )
529 {
530 wxDELETE( m_penImage );
531 wxDELETE( m_penBrush );
532 m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
533 m_penBrush = new TextureBrush(m_penImage);
534 m_pen->SetBrush( m_penBrush );
535 }
536 */
537 }
538 break;
539 default :
540 if ( m_pen.GetStyle() >= wxPENSTYLE_FIRST_HATCH
541 && m_pen.GetStyle() <= wxPENSTYLE_LAST_HATCH )
542 {
543 /*
544 wxDELETE( m_penBrush );
545 HatchStyle style = HatchStyleHorizontal;
546 switch( pen.GetStyle() )
547 {
548 case wxPENSTYLE_BDIAGONAL_HATCH :
549 style = HatchStyleBackwardDiagonal;
550 break ;
551 case wxPENSTYLE_CROSSDIAG_HATCH :
552 style = HatchStyleDiagonalCross;
553 break ;
554 case wxPENSTYLE_FDIAGONAL_HATCH :
555 style = HatchStyleForwardDiagonal;
556 break ;
557 case wxPENSTYLE_CROSS_HATCH :
558 style = HatchStyleCross;
559 break ;
560 case wxPENSTYLE_HORIZONTAL_HATCH :
561 style = HatchStyleHorizontal;
562 break ;
563 case wxPENSTYLE_VERTICAL_HATCH :
564 style = HatchStyleVertical;
565 break ;
566
567 }
568 m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
569 pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
570 m_pen->SetBrush( m_penBrush )
571 */
572 }
573 break;
574 }
575 }
576
577 void wxCairoPenData::Apply( wxGraphicsContext* context )
578 {
579 cairo_t * ctext = (cairo_t*) context->GetNativeContext();
580 cairo_set_line_width(ctext,m_width);
581 cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
582 cairo_set_line_cap(ctext,m_cap);
583 cairo_set_line_join(ctext,m_join);
584 cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0);
585 }
586
587 //-----------------------------------------------------------------------------
588 // wxCairoBrushData implementation
589 //-----------------------------------------------------------------------------
590
591 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer )
592 : wxGraphicsObjectRefData( renderer )
593 {
594 Init();
595 }
596
597 wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush )
598 : wxGraphicsObjectRefData(renderer)
599 {
600 Init();
601
602 m_red = brush.GetColour().Red()/255.0;
603 m_green = brush.GetColour().Green()/255.0;
604 m_blue = brush.GetColour().Blue()/255.0;
605 m_alpha = brush.GetColour().Alpha()/255.0;
606 /*
607 if ( brush.GetStyle() == wxBRUSHSTYLE_SOLID)
608 {
609 m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
610 brush.GetColour().Green() , brush.GetColour().Blue() ) );
611 }
612 else if ( brush.IsHatch() )
613 {
614 HatchStyle style = HatchStyleHorizontal;
615 switch( brush.GetStyle() )
616 {
617 case wxBRUSHSTYLE_BDIAGONAL_HATCH :
618 style = HatchStyleBackwardDiagonal;
619 break ;
620 case wxBRUSHSTYLE_CROSSDIAG_HATCH :
621 style = HatchStyleDiagonalCross;
622 break ;
623 case wxBRUSHSTYLE_FDIAGONAL_HATCH :
624 style = HatchStyleForwardDiagonal;
625 break ;
626 case wxBRUSHSTYLE_CROSS_HATCH :
627 style = HatchStyleCross;
628 break ;
629 case wxBRUSHSTYLE_HORIZONTAL_HATCH :
630 style = HatchStyleHorizontal;
631 break ;
632 case wxBRUSHSTYLE_VERTICAL_HATCH :
633 style = HatchStyleVertical;
634 break ;
635
636 }
637 m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
638 brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
639 }
640 else
641 {
642 wxBitmap* bmp = brush.GetStipple();
643 if ( bmp && bmp->Ok() )
644 {
645 wxDELETE( m_brushImage );
646 m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
647 m_brush = new TextureBrush(m_brushImage);
648 }
649 }
650 */
651 }
652
653 wxCairoBrushData::~wxCairoBrushData ()
654 {
655 if (m_brushPattern)
656 cairo_pattern_destroy(m_brushPattern);
657 }
658
659 void wxCairoBrushData::Apply( wxGraphicsContext* context )
660 {
661 cairo_t * ctext = (cairo_t*) context->GetNativeContext();
662 if ( m_brushPattern )
663 {
664 cairo_set_source(ctext,m_brushPattern);
665 }
666 else
667 {
668 cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
669 }
670 }
671
672 void wxCairoBrushData::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
673 const wxColour&c1, const wxColour&c2 )
674 {
675 m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
676 cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,c1.Red()/255.0,
677 c1.Green()/255.0, c1.Blue()/255.0,c1.Alpha()/255.0);
678 cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,c2.Red()/255.0,
679 c2.Green()/255.0, c2.Blue()/255.0,c2.Alpha()/255.0);
680 wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
681 }
682
683 void wxCairoBrushData::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
684 const wxColour &oColor, const wxColour &cColor )
685 {
686 m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
687 cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,oColor.Red()/255.0,
688 oColor.Green()/255.0, oColor.Blue()/255.0,oColor.Alpha()/255.0);
689 cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,cColor.Red()/255.0,
690 cColor.Green()/255.0, cColor.Blue()/255.0,cColor.Alpha()/255.0);
691 wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
692 }
693
694 void wxCairoBrushData::Init()
695 {
696 m_brushPattern = NULL;
697 }
698
699 //-----------------------------------------------------------------------------
700 // wxCairoFontData implementation
701 //-----------------------------------------------------------------------------
702
703 wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font,
704 const wxColour& col ) : wxGraphicsObjectRefData(renderer)
705 {
706 m_red = col.Red()/255.0;
707 m_green = col.Green()/255.0;
708 m_blue = col.Blue()/255.0;
709 m_alpha = col.Alpha()/255.0;
710 m_size = font.GetPointSize();
711 m_underlined = font.GetUnderlined();
712
713 #ifdef __WXMAC__
714 m_font = cairo_quartz_font_face_create_for_cgfont( font.OSXGetCGFont() );
715 #elif defined(__WXGTK__)
716 m_font = pango_font_description_copy( font.GetNativeFontInfo()->description );
717 #else
718 m_fontName = font.GetFaceName().mb_str(wxConvUTF8);
719 m_slant = font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL;
720 m_weight = font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL;
721 #endif
722 }
723
724 wxCairoFontData::~wxCairoFontData()
725 {
726 #ifdef __WXMAC__
727 cairo_font_face_destroy( m_font );
728 #elif defined(__WXGTK__)
729 pango_font_description_free( m_font );
730 #else
731 #endif
732 }
733
734 void wxCairoFontData::Apply( wxGraphicsContext* context )
735 {
736 cairo_t * ctext = (cairo_t*) context->GetNativeContext();
737 cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha);
738 #ifdef __WXGTK__
739 // the rest is done using Pango layouts
740 #elif defined(__WXMAC__)
741 cairo_set_font_face(ctext, m_font);
742 cairo_set_font_size(ctext, m_size );
743 #else
744 cairo_select_font_face(ctext, m_fontName, m_slant, m_weights );
745 cairo_set_font_size(ctext, m_size );
746 #endif
747 }
748
749 //-----------------------------------------------------------------------------
750 // wxCairoPathData implementation
751 //-----------------------------------------------------------------------------
752
753 wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext)
754 : wxGraphicsPathData(renderer)
755 {
756 if (pathcontext)
757 {
758 m_pathContext = pathcontext;
759 }
760 else
761 {
762 cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
763 m_pathContext = cairo_create(surface);
764 cairo_surface_destroy (surface);
765 }
766 }
767
768 wxCairoPathData::~wxCairoPathData()
769 {
770 cairo_destroy(m_pathContext);
771 }
772
773 wxGraphicsObjectRefData *wxCairoPathData::Clone() const
774 {
775 cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
776 cairo_t* pathcontext = cairo_create(surface);
777 cairo_surface_destroy (surface);
778
779 cairo_path_t* path = cairo_copy_path(m_pathContext);
780 cairo_append_path(pathcontext, path);
781 cairo_path_destroy(path);
782 return new wxCairoPathData( GetRenderer() ,pathcontext);
783 }
784
785
786 void* wxCairoPathData::GetNativePath() const
787 {
788 return cairo_copy_path(m_pathContext) ;
789 }
790
791 void wxCairoPathData::UnGetNativePath(void *p) const
792 {
793 cairo_path_destroy((cairo_path_t*)p);
794 }
795
796 //
797 // The Primitives
798 //
799
800 void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y )
801 {
802 cairo_move_to(m_pathContext,x,y);
803 }
804
805 void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y )
806 {
807 cairo_line_to(m_pathContext,x,y);
808 }
809
810 void wxCairoPathData::AddPath( const wxGraphicsPathData* path )
811 {
812 cairo_path_t* p = (cairo_path_t*)path->GetNativePath();
813 cairo_append_path(m_pathContext, p);
814 UnGetNativePath(p);
815 }
816
817 void wxCairoPathData::CloseSubpath()
818 {
819 cairo_close_path(m_pathContext);
820 }
821
822 void wxCairoPathData::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
823 {
824 cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
825 }
826
827 // gets the last point of the current path, (0,0) if not yet set
828 void wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const
829 {
830 double dx,dy;
831 cairo_get_current_point(m_pathContext,&dx,&dy);
832 if (x)
833 *x = dx;
834 if (y)
835 *y = dy;
836 }
837
838 void wxCairoPathData::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
839 {
840 // as clockwise means positive in our system (y pointing downwards)
841 // TODO make this interpretation dependent of the
842 // real device trans
843 if ( clockwise||(endAngle-startAngle)>=2*M_PI)
844 cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
845 else
846 cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
847 }
848
849 // transforms each point of this path by the matrix
850 void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix )
851 {
852 // as we don't have a true path object, we have to apply the inverse
853 // matrix to the context
854 cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix());
855 cairo_matrix_invert( &m );
856 cairo_transform(m_pathContext,&m);
857 }
858
859 // gets the bounding box enclosing all points (possibly including control points)
860 void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const
861 {
862 double x1,y1,x2,y2;
863
864 cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 );
865 if ( x2 < x1 )
866 {
867 *x = x2;
868 *w = x1-x2;
869 }
870 else
871 {
872 *x = x1;
873 *w = x2-x1;
874 }
875
876 if( y2 < y1 )
877 {
878 *y = y2;
879 *h = y1-y2;
880 }
881 else
882 {
883 *y = y1;
884 *h = y2-y1;
885 }
886 }
887
888 bool wxCairoPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode WXUNUSED(fillStyle) ) const
889 {
890 return cairo_in_stroke( m_pathContext, x, y) != 0;
891 }
892
893 //-----------------------------------------------------------------------------
894 // wxCairoMatrixData implementation
895 //-----------------------------------------------------------------------------
896
897 wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix )
898 : wxGraphicsMatrixData(renderer)
899 {
900 if ( matrix )
901 m_matrix = *matrix;
902 }
903
904 wxCairoMatrixData::~wxCairoMatrixData()
905 {
906 // nothing to do
907 }
908
909 wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const
910 {
911 return new wxCairoMatrixData(GetRenderer(),&m_matrix);
912 }
913
914 // concatenates the matrix
915 void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t )
916 {
917 cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix());
918 }
919
920 // sets the matrix to the respective values
921 void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d,
922 wxDouble tx, wxDouble ty)
923 {
924 cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty);
925 }
926
927 // gets the component valuess of the matrix
928 void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b, wxDouble* c,
929 wxDouble* d, wxDouble* tx, wxDouble* ty) const
930 {
931 if (a) *a = m_matrix.xx;
932 if (b) *b = m_matrix.yx;
933 if (c) *c = m_matrix.xy;
934 if (d) *d = m_matrix.yy;
935 if (tx) *tx= m_matrix.x0;
936 if (ty) *ty= m_matrix.y0;
937 }
938
939 // makes this the inverse matrix
940 void wxCairoMatrixData::Invert()
941 {
942 cairo_matrix_invert( &m_matrix );
943 }
944
945 // returns true if the elements of the transformation matrix are equal ?
946 bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const
947 {
948 const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix();
949 return (
950 m_matrix.xx == tm->xx &&
951 m_matrix.yx == tm->yx &&
952 m_matrix.xy == tm->xy &&
953 m_matrix.yy == tm->yy &&
954 m_matrix.x0 == tm->x0 &&
955 m_matrix.y0 == tm->y0 ) ;
956 }
957
958 // return true if this is the identity matrix
959 bool wxCairoMatrixData::IsIdentity() const
960 {
961 return ( m_matrix.xx == 1 && m_matrix.yy == 1 &&
962 m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0);
963 }
964
965 //
966 // transformation
967 //
968
969 // add the translation to this matrix
970 void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy )
971 {
972 cairo_matrix_translate( &m_matrix, dx, dy) ;
973 }
974
975 // add the scale to this matrix
976 void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale )
977 {
978 cairo_matrix_scale( &m_matrix, xScale, yScale) ;
979 }
980
981 // add the rotation to this matrix (radians)
982 void wxCairoMatrixData::Rotate( wxDouble angle )
983 {
984 cairo_matrix_rotate( &m_matrix, angle) ;
985 }
986
987 //
988 // apply the transforms
989 //
990
991 // applies that matrix to the point
992 void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const
993 {
994 double lx = *x, ly = *y ;
995 cairo_matrix_transform_point( &m_matrix, &lx, &ly);
996 *x = lx;
997 *y = ly;
998 }
999
1000 // applies the matrix except for translations
1001 void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const
1002 {
1003 double lx = *dx, ly = *dy ;
1004 cairo_matrix_transform_distance( &m_matrix, &lx, &ly);
1005 *dx = lx;
1006 *dy = ly;
1007 }
1008
1009 // returns the native representation
1010 void * wxCairoMatrixData::GetNativeMatrix() const
1011 {
1012 return (void*) &m_matrix;
1013 }
1014
1015 // wxCairoBitmap implementation
1016 //-----------------------------------------------------------------------------
1017
1018 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, cairo_surface_t* bitmap ) :
1019 wxGraphicsObjectRefData( renderer )
1020 {
1021 m_surface = bitmap;
1022 m_pattern = cairo_pattern_create_for_surface(m_surface);
1023 }
1024
1025 wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp ) : wxGraphicsObjectRefData( renderer )
1026 {
1027 wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap"));
1028
1029 int bw = bmp.GetWidth();
1030 int bh = bmp.GetHeight();
1031 wxBitmap bmpSource = bmp; // we need a non-const instance
1032 m_buffer = new unsigned char[bw*bh*4];
1033 wxUint32* data = (wxUint32*)m_buffer;
1034
1035 // Create a surface object and copy the bitmap pixel data to it. if the
1036 // image has alpha (or a mask represented as alpha) then we'll use a
1037 // different format and iterator than if it doesn't...
1038 if (bmpSource.HasAlpha() || bmpSource.GetMask())
1039 {
1040 m_surface = cairo_image_surface_create_for_data(
1041 m_buffer, CAIRO_FORMAT_ARGB32, bw, bh, bw*4);
1042 wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1043 wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1044
1045 wxAlphaPixelData::Iterator p(pixData);
1046 for (int y=0; y<bh; y++)
1047 {
1048 wxAlphaPixelData::Iterator rowStart = p;
1049 for (int x=0; x<bw; x++)
1050 {
1051 // Each pixel in CAIRO_FORMAT_ARGB32 is a 32-bit quantity,
1052 // with alpha in the upper 8 bits, then red, then green, then
1053 // blue. The 32-bit quantities are stored native-endian.
1054 // Pre-multiplied alpha is used.
1055 unsigned char alpha = p.Alpha();
1056 if (alpha == 0)
1057 *data = 0;
1058 else
1059 *data = ( alpha << 24
1060 | (p.Red() * alpha/255) << 16
1061 | (p.Green() * alpha/255) << 8
1062 | (p.Blue() * alpha/255) );
1063 ++data;
1064 ++p;
1065 }
1066 p = rowStart;
1067 p.OffsetY(pixData, 1);
1068 }
1069 }
1070 else // no alpha
1071 {
1072 m_surface = cairo_image_surface_create_for_data(
1073 m_buffer, CAIRO_FORMAT_RGB24, bw, bh, bw*4);
1074 wxNativePixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh));
1075 wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data."));
1076
1077 wxNativePixelData::Iterator p(pixData);
1078 for (int y=0; y<bh; y++)
1079 {
1080 wxNativePixelData::Iterator rowStart = p;
1081 for (int x=0; x<bw; x++)
1082 {
1083 // Each pixel in CAIRO_FORMAT_RGB24 is a 32-bit quantity, with
1084 // the upper 8 bits unused. Red, Green, and Blue are stored in
1085 // the remaining 24 bits in that order. The 32-bit quantities
1086 // are stored native-endian.
1087 *data = ( p.Red() << 16 | p.Green() << 8 | p.Blue() );
1088 ++data;
1089 ++p;
1090 }
1091 p = rowStart;
1092 p.OffsetY(pixData, 1);
1093 }
1094 }
1095 m_pattern = cairo_pattern_create_for_surface(m_surface);
1096 }
1097
1098 wxCairoBitmapData::~wxCairoBitmapData()
1099 {
1100 if (m_pattern)
1101 cairo_pattern_destroy(m_pattern);
1102
1103 if (m_surface)
1104 cairo_surface_destroy(m_surface);
1105
1106 delete [] m_buffer;
1107 }
1108
1109
1110
1111 //-----------------------------------------------------------------------------
1112 // wxCairoContext implementation
1113 //-----------------------------------------------------------------------------
1114
1115 class wxCairoOffsetHelper
1116 {
1117 public :
1118 wxCairoOffsetHelper( cairo_t* ctx , bool offset )
1119 {
1120 m_ctx = ctx;
1121 m_offset = offset;
1122 if ( m_offset )
1123 cairo_translate( m_ctx, 0.5, 0.5 );
1124 }
1125 ~wxCairoOffsetHelper( )
1126 {
1127 if ( m_offset )
1128 cairo_translate( m_ctx, -0.5, -0.5 );
1129 }
1130 public :
1131 cairo_t* m_ctx;
1132 bool m_offset;
1133 } ;
1134
1135 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxPrinterDC& dc )
1136 : wxGraphicsContext(renderer)
1137 {
1138 #ifdef __WXGTK20__
1139 const wxDCImpl *impl = dc.GetImpl();
1140 Init( (cairo_t*) impl->GetCairoContext() );
1141
1142 wxPoint org = dc.GetDeviceOrigin();
1143 cairo_translate( m_context, org.x, org.y );
1144
1145 double sx,sy;
1146 dc.GetUserScale( &sx, &sy );
1147 cairo_scale( m_context, sx, sy );
1148
1149 org = dc.GetLogicalOrigin();
1150 cairo_translate( m_context, -org.x, -org.y );
1151 #endif
1152 }
1153
1154 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc )
1155 : wxGraphicsContext(renderer)
1156 {
1157 #ifdef __WXGTK20__
1158 wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1159 Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1160
1161 #if 0
1162 wxGraphicsMatrix matrix = CreateMatrix();
1163
1164 wxPoint org = dc.GetDeviceOrigin();
1165 matrix.Translate( org.x, org.y );
1166
1167 org = dc.GetLogicalOrigin();
1168 matrix.Translate( -org.x, -org.y );
1169
1170 double sx,sy;
1171 dc.GetUserScale( &sx, &sy );
1172 matrix.Scale( sx, sy );
1173
1174 ConcatTransform( matrix );
1175 #endif
1176 #endif
1177
1178 #ifdef __WXMAC__
1179 int width, height;
1180 dc.GetSize( &width, &height );
1181 CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1182 cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1183 Init( cairo_create( surface ) );
1184 cairo_surface_destroy( surface );
1185 #endif
1186 }
1187
1188 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, const wxMemoryDC& dc )
1189 : wxGraphicsContext(renderer)
1190 {
1191 #ifdef __WXGTK20__
1192 wxGTKDCImpl *impldc = (wxGTKDCImpl*) dc.GetImpl();
1193 Init( gdk_cairo_create( impldc->GetGDKWindow() ) );
1194
1195 #if 0
1196 wxGraphicsMatrix matrix = CreateMatrix();
1197
1198 wxPoint org = dc.GetDeviceOrigin();
1199 matrix.Translate( org.x, org.y );
1200
1201 org = dc.GetLogicalOrigin();
1202 matrix.Translate( -org.x, -org.y );
1203
1204 double sx,sy;
1205 dc.GetUserScale( &sx, &sy );
1206 matrix.Scale( sx, sy );
1207
1208 ConcatTransform( matrix );
1209 #endif
1210 #endif
1211
1212 #ifdef __WXMAC__
1213 int width, height;
1214 dc.GetSize( &width, &height );
1215 CGContextRef cgcontext = (CGContextRef)dc.GetWindow()->MacGetCGContextRef();
1216 cairo_surface_t* surface = cairo_quartz_surface_create_for_cg_context(cgcontext, width, height);
1217 Init( cairo_create( surface ) );
1218 cairo_surface_destroy( surface );
1219 #endif
1220 }
1221
1222 #ifdef __WXGTK20__
1223 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable )
1224 : wxGraphicsContext(renderer)
1225 {
1226 Init( gdk_cairo_create( drawable ) );
1227 }
1228 #endif
1229
1230 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context )
1231 : wxGraphicsContext(renderer)
1232 {
1233 Init( context );
1234 }
1235
1236 wxCairoContext::wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window)
1237 : wxGraphicsContext(renderer)
1238 {
1239 #ifdef __WXGTK__
1240 // something along these lines (copied from dcclient)
1241
1242 // Some controls don't have m_wxwindow - like wxStaticBox, but the user
1243 // code should still be able to create wxClientDCs for them, so we will
1244 // use the parent window here then.
1245 if (window->m_wxwindow == NULL)
1246 {
1247 window = window->GetParent();
1248 }
1249
1250 wxASSERT_MSG( window->m_wxwindow, wxT("wxCairoContext needs a widget") );
1251
1252 Init(gdk_cairo_create(window->GTKGetDrawingWindow()));
1253 #endif
1254 }
1255
1256 wxCairoContext::~wxCairoContext()
1257 {
1258 if ( m_context )
1259 {
1260 PopState();
1261 PopState();
1262 cairo_destroy(m_context);
1263 }
1264 }
1265
1266 void wxCairoContext::Init(cairo_t *context)
1267 {
1268 m_context = context ;
1269 PushState();
1270 PushState();
1271 }
1272
1273
1274 void wxCairoContext::Clip( const wxRegion& region )
1275 {
1276 // Create a path with all the rectangles in the region
1277 wxGraphicsPath path = GetRenderer()->CreatePath();
1278 wxRegionIterator ri(region);
1279 while (ri)
1280 {
1281 path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH());
1282 ++ri;
1283 }
1284
1285 // Put it in the context
1286 cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1287 cairo_append_path(m_context, cp);
1288
1289 // clip to that path
1290 cairo_clip(m_context);
1291 path.UnGetNativePath(cp);
1292 }
1293
1294 void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1295 {
1296 // Create a path with this rectangle
1297 wxGraphicsPath path = GetRenderer()->CreatePath();
1298 path.AddRectangle(x,y,w,h);
1299
1300 // Put it in the context
1301 cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1302 cairo_append_path(m_context, cp);
1303
1304 // clip to that path
1305 cairo_clip(m_context);
1306 path.UnGetNativePath(cp);
1307 }
1308
1309 void wxCairoContext::ResetClip()
1310 {
1311 cairo_reset_clip(m_context);
1312 }
1313
1314
1315 void wxCairoContext::StrokePath( const wxGraphicsPath& path )
1316 {
1317 if ( !m_pen.IsNull() )
1318 {
1319 wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1320 cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1321 cairo_append_path(m_context,cp);
1322 ((wxCairoPenData*)m_pen.GetRefData())->Apply(this);
1323 cairo_stroke(m_context);
1324 path.UnGetNativePath(cp);
1325 }
1326 }
1327
1328 void wxCairoContext::FillPath( const wxGraphicsPath& path , wxPolygonFillMode fillStyle )
1329 {
1330 if ( !m_brush.IsNull() )
1331 {
1332 wxCairoOffsetHelper helper( m_context, ShouldOffset() ) ;
1333 cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ;
1334 cairo_append_path(m_context,cp);
1335 ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this);
1336 cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
1337 cairo_fill(m_context);
1338 path.UnGetNativePath(cp);
1339 }
1340 }
1341
1342 void wxCairoContext::Rotate( wxDouble angle )
1343 {
1344 cairo_rotate(m_context,angle);
1345 }
1346
1347 void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
1348 {
1349 cairo_translate(m_context,dx,dy);
1350 }
1351
1352 void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
1353 {
1354 cairo_scale(m_context,xScale,yScale);
1355 }
1356
1357 // concatenates this transform with the current transform of this context
1358 void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix )
1359 {
1360 cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix());
1361 }
1362
1363 // sets the transform of this context
1364 void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix )
1365 {
1366 cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix());
1367 }
1368
1369 // gets the matrix of this context
1370 wxGraphicsMatrix wxCairoContext::GetTransform() const
1371 {
1372 wxGraphicsMatrix matrix = CreateMatrix();
1373 cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix());
1374 return matrix;
1375 }
1376
1377
1378
1379 void wxCairoContext::PushState()
1380 {
1381 cairo_save(m_context);
1382 }
1383
1384 void wxCairoContext::PopState()
1385 {
1386 cairo_restore(m_context);
1387 }
1388
1389 void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1390 {
1391 wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp);
1392 DrawBitmap(bitmap, x, y, w, h);
1393
1394 }
1395
1396 void wxCairoContext::DrawBitmap(const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1397 {
1398 PushState();
1399
1400 // In case we're scaling the image by using a width and height different
1401 // than the bitmap's size create a pattern transformation on the surface and
1402 // draw the transformed pattern.
1403 wxCairoBitmapData* data = static_cast<wxCairoBitmapData*>(bmp.GetRefData());
1404 cairo_pattern_t* pattern = data->GetCairoPattern();
1405 wxSize size = data->GetSize();
1406
1407 wxDouble scaleX = w / size.GetWidth();
1408 wxDouble scaleY = h / size.GetHeight();
1409 cairo_scale(m_context, scaleX, scaleY);
1410
1411 // prepare to draw the image
1412 cairo_translate(m_context, x, y);
1413 cairo_set_source(m_context, pattern);
1414 // use the original size here since the context is scaled already...
1415 cairo_rectangle(m_context, 0, 0, size.GetWidth(), size.GetHeight());
1416 // fill the rectangle using the pattern
1417 cairo_fill(m_context);
1418
1419 PopState();
1420 }
1421
1422 void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
1423 {
1424 // An icon is a bitmap on wxGTK, so do this the easy way. When we want to
1425 // start using the Cairo backend on other platforms then we may need to
1426 // fiddle with this...
1427 DrawBitmap(icon, x, y, w, h);
1428 }
1429
1430
1431 void wxCairoContext::DoDrawText(const wxString& str, wxDouble x, wxDouble y)
1432 {
1433 wxCHECK_RET( !m_font.IsNull(),
1434 wxT("wxCairoContext::DrawText - no valid font set") );
1435
1436 if ( str.empty())
1437 return;
1438
1439 const wxCharBuffer data = str.utf8_str();
1440 if ( !data )
1441 return;
1442
1443 ((wxCairoFontData*)m_font.GetRefData())->Apply(this);
1444
1445 #ifdef __WXGTK__
1446 size_t datalen = strlen(data);
1447
1448 PangoLayout *layout = pango_cairo_create_layout (m_context);
1449 wxCairoFontData* font_data = (wxCairoFontData*) m_font.GetRefData();
1450 pango_layout_set_font_description( layout, font_data->GetFont());
1451 pango_layout_set_text(layout, data, datalen);
1452
1453 if (font_data->GetUnderlined())
1454 {
1455 PangoAttrList *attrs = pango_attr_list_new();
1456 PangoAttribute *attr = pango_attr_underline_new(PANGO_UNDERLINE_SINGLE);
1457 pango_attr_list_insert(attrs, attr);
1458 pango_layout_set_attributes(layout, attrs);
1459 pango_attr_list_unref(attrs);
1460 }
1461
1462 cairo_move_to(m_context, x, y);
1463 pango_cairo_show_layout (m_context, layout);
1464
1465 g_object_unref (layout);
1466 #else
1467 // Cairo's x,y for drawing text is at the baseline, so we need to adjust
1468 // the position we move to by the ascent.
1469 cairo_font_extents_t fe;
1470 cairo_font_extents(m_context, &fe);
1471 cairo_move_to(m_context, x, y+fe.ascent);
1472
1473 cairo_show_text(m_context, data);
1474 #endif
1475 }
1476
1477 void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
1478 wxDouble *descent, wxDouble *externalLeading ) const
1479 {
1480 wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") );
1481
1482 if ( width )
1483 *width = 0;
1484 if ( height )
1485 *height = 0;
1486 if ( descent )
1487 *descent = 0;
1488 if ( externalLeading )
1489 *externalLeading = 0;
1490
1491 if ( str.empty())
1492 return;
1493
1494 #ifdef __WXGTK__
1495 int w, h;
1496
1497 PangoLayout *layout = pango_cairo_create_layout (m_context);
1498 pango_layout_set_font_description( layout, ((wxCairoFontData*)m_font.GetRefData())->GetFont());
1499 const wxCharBuffer data = str.utf8_str();
1500 if ( !data )
1501 {
1502 return;
1503 }
1504 pango_layout_set_text( layout, data, strlen(data) );
1505 pango_layout_get_pixel_size (layout, &w, &h);
1506 if ( width )
1507 *width = w;
1508 if ( height )
1509 *height = h;
1510 if (descent)
1511 {
1512 PangoLayoutIter *iter = pango_layout_get_iter(layout);
1513 int baseline = pango_layout_iter_get_baseline(iter);
1514 pango_layout_iter_free(iter);
1515 *descent = h - PANGO_PIXELS(baseline);
1516 }
1517 g_object_unref (layout);
1518 #else
1519 ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this);
1520
1521 if (width)
1522 {
1523 const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
1524 cairo_text_extents_t te;
1525 cairo_text_extents(m_context, buf, &te);
1526 *width = te.width;
1527 }
1528
1529 if (height || descent || externalLeading)
1530 {
1531 cairo_font_extents_t fe;
1532 cairo_font_extents(m_context, &fe);
1533
1534 // some backends have negative descents
1535
1536 if ( fe.descent < 0 )
1537 fe.descent = -fe.descent;
1538
1539 if ( fe.height < (fe.ascent + fe.descent ) )
1540 {
1541 // some backends are broken re height ... (eg currently ATSUI)
1542 fe.height = fe.ascent + fe.descent;
1543 }
1544
1545 if (height)
1546 *height = fe.height;
1547 if ( descent )
1548 *descent = fe.descent;
1549 if ( externalLeading )
1550 *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent));
1551 }
1552 #endif
1553 }
1554
1555 void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
1556 {
1557 widths.Empty();
1558 widths.Add(0, text.length());
1559
1560 wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") );
1561
1562 if (text.empty())
1563 return;
1564
1565 // TODO
1566 }
1567
1568 void * wxCairoContext::GetNativeContext()
1569 {
1570 return m_context;
1571 }
1572
1573 bool wxCairoContext::SetAntialiasMode(wxAntialiasMode antialias)
1574 {
1575 if (m_antialias == antialias)
1576 return true;
1577
1578 m_antialias = antialias;
1579
1580 cairo_antialias_t antialiasMode;
1581 switch (antialias)
1582 {
1583 case wxANTIALIAS_DEFAULT:
1584 antialiasMode = CAIRO_ANTIALIAS_DEFAULT;
1585 break;
1586 case wxANTIALIAS_NONE:
1587 antialiasMode = CAIRO_ANTIALIAS_NONE;
1588 break;
1589 default:
1590 return false;
1591 }
1592 cairo_set_antialias(m_context, antialiasMode);
1593 return true;
1594 }
1595
1596 bool wxCairoContext::SetCompositionMode(wxCompositionMode op)
1597 {
1598 if ( m_composition == op )
1599 return true;
1600
1601 m_composition = op;
1602 cairo_operator_t cop;
1603 switch (op)
1604 {
1605 case wxCOMPOSITION_CLEAR:
1606 cop = CAIRO_OPERATOR_CLEAR;
1607 break;
1608 case wxCOMPOSITION_SOURCE:
1609 cop = CAIRO_OPERATOR_SOURCE;
1610 break;
1611 case wxCOMPOSITION_OVER:
1612 cop = CAIRO_OPERATOR_OVER;
1613 break;
1614 case wxCOMPOSITION_IN:
1615 cop = CAIRO_OPERATOR_IN;
1616 break;
1617 case wxCOMPOSITION_OUT:
1618 cop = CAIRO_OPERATOR_OUT;
1619 break;
1620 case wxCOMPOSITION_ATOP:
1621 cop = CAIRO_OPERATOR_ATOP;
1622 break;
1623 case wxCOMPOSITION_DEST:
1624 cop = CAIRO_OPERATOR_DEST;
1625 break;
1626 case wxCOMPOSITION_DEST_OVER:
1627 cop = CAIRO_OPERATOR_DEST_OVER;
1628 break;
1629 case wxCOMPOSITION_DEST_IN:
1630 cop = CAIRO_OPERATOR_DEST_IN;
1631 break;
1632 case wxCOMPOSITION_DEST_OUT:
1633 cop = CAIRO_OPERATOR_DEST_OUT;
1634 break;
1635 case wxCOMPOSITION_DEST_ATOP:
1636 cop = CAIRO_OPERATOR_DEST_ATOP;
1637 break;
1638 case wxCOMPOSITION_XOR:
1639 cop = CAIRO_OPERATOR_XOR;
1640 break;
1641 case wxCOMPOSITION_ADD:
1642 cop = CAIRO_OPERATOR_ADD;
1643 break;
1644 default:
1645 return false;
1646 }
1647 cairo_set_operator(m_context, cop);
1648 return true;
1649 }
1650
1651 void wxCairoContext::BeginLayer(wxDouble opacity)
1652 {
1653 m_layerOpacities.push_back(opacity);
1654 cairo_push_group(m_context);
1655 }
1656
1657 void wxCairoContext::EndLayer()
1658 {
1659 float opacity = m_layerOpacities.back();
1660 m_layerOpacities.pop_back();
1661 cairo_pop_group_to_source(m_context);
1662 cairo_paint_with_alpha(m_context,opacity);
1663 }
1664
1665 //-----------------------------------------------------------------------------
1666 // wxCairoRenderer declaration
1667 //-----------------------------------------------------------------------------
1668
1669 class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer
1670 {
1671 public :
1672 wxCairoRenderer() {}
1673
1674 virtual ~wxCairoRenderer() {}
1675
1676 // Context
1677
1678 virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc);
1679 virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc);
1680 virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc);
1681
1682 virtual wxGraphicsContext * CreateContextFromNativeContext( void * context );
1683
1684 virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window );
1685
1686 virtual wxGraphicsContext * CreateContext( wxWindow* window );
1687
1688 virtual wxGraphicsContext * CreateMeasuringContext();
1689
1690 // Path
1691
1692 virtual wxGraphicsPath CreatePath();
1693
1694 // Matrix
1695
1696 virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
1697 wxDouble tx=0.0, wxDouble ty=0.0);
1698
1699
1700 virtual wxGraphicsPen CreatePen(const wxPen& pen) ;
1701
1702 virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
1703
1704 // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1705 virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1706 const wxColour&c1, const wxColour&c2) ;
1707
1708 // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1709 // with radius r and color cColor
1710 virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1711 const wxColour &oColor, const wxColour &cColor) ;
1712
1713 // sets the font
1714 virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
1715
1716 // create a native bitmap representation
1717 virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap );
1718
1719 // create a graphics bitmap from a native bitmap
1720 virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
1721
1722 // create a subimage from a native image representation
1723 virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
1724
1725 private :
1726 DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer)
1727 } ;
1728
1729 //-----------------------------------------------------------------------------
1730 // wxCairoRenderer implementation
1731 //-----------------------------------------------------------------------------
1732
1733 IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer)
1734
1735 static wxCairoRenderer gs_cairoGraphicsRenderer;
1736 // temporary hack to allow creating a cairo context on any platform
1737 extern wxGraphicsRenderer* gCairoRenderer;
1738 wxGraphicsRenderer* gCairoRenderer = &gs_cairoGraphicsRenderer;
1739
1740 #ifdef __WXGTK__
1741 wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
1742 {
1743 return &gs_cairoGraphicsRenderer;
1744 }
1745 #endif
1746
1747 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc)
1748 {
1749 return new wxCairoContext(this,dc);
1750 }
1751
1752 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc)
1753 {
1754 return new wxCairoContext(this,dc);
1755 }
1756
1757 wxGraphicsContext * wxCairoRenderer::CreateContext( const wxPrinterDC& dc)
1758 {
1759 #ifdef __WXGTK20__
1760 const wxDCImpl *impl = dc.GetImpl();
1761 cairo_t* context = (cairo_t*) impl->GetCairoContext();
1762 if (context)
1763 return new wxCairoContext(this,dc);
1764 else
1765 #endif
1766 return NULL;
1767 }
1768
1769 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context )
1770 {
1771 return new wxCairoContext(this,(cairo_t*)context);
1772 }
1773
1774
1775 wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window )
1776 {
1777 #ifdef __WXGTK__
1778 return new wxCairoContext(this,(GdkDrawable*)window);
1779 #else
1780 return NULL;
1781 #endif
1782 }
1783
1784 wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext()
1785 {
1786 #ifdef __WXGTK__
1787 return CreateContextFromNativeWindow(gdk_get_default_root_window());
1788 #endif
1789 return NULL;
1790 // TODO
1791 }
1792
1793 wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window )
1794 {
1795 return new wxCairoContext(this, window );
1796 }
1797
1798 // Path
1799
1800 wxGraphicsPath wxCairoRenderer::CreatePath()
1801 {
1802 wxGraphicsPath path;
1803 path.SetRefData( new wxCairoPathData(this) );
1804 return path;
1805 }
1806
1807
1808 // Matrix
1809
1810 wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d,
1811 wxDouble tx, wxDouble ty)
1812
1813 {
1814 wxGraphicsMatrix m;
1815 wxCairoMatrixData* data = new wxCairoMatrixData( this );
1816 data->Set( a,b,c,d,tx,ty ) ;
1817 m.SetRefData(data);
1818 return m;
1819 }
1820
1821 wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen)
1822 {
1823 if ( !pen.Ok() || pen.GetStyle() == wxPENSTYLE_TRANSPARENT )
1824 return wxNullGraphicsPen;
1825 else
1826 {
1827 wxGraphicsPen p;
1828 p.SetRefData(new wxCairoPenData( this, pen ));
1829 return p;
1830 }
1831 }
1832
1833 wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush )
1834 {
1835 if ( !brush.Ok() || brush.GetStyle() == wxBRUSHSTYLE_TRANSPARENT )
1836 return wxNullGraphicsBrush;
1837 else
1838 {
1839 wxGraphicsBrush p;
1840 p.SetRefData(new wxCairoBrushData( this, brush ));
1841 return p;
1842 }
1843 }
1844
1845 // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
1846 wxGraphicsBrush wxCairoRenderer::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
1847 const wxColour&c1, const wxColour&c2)
1848 {
1849 wxGraphicsBrush p;
1850 wxCairoBrushData* d = new wxCairoBrushData( this );
1851 d->CreateLinearGradientBrush(x1, y1, x2, y2, c1, c2);
1852 p.SetRefData(d);
1853 return p;
1854 }
1855
1856 // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
1857 // with radius r and color cColor
1858 wxGraphicsBrush wxCairoRenderer::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
1859 const wxColour &oColor, const wxColour &cColor)
1860 {
1861 wxGraphicsBrush p;
1862 wxCairoBrushData* d = new wxCairoBrushData( this );
1863 d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,oColor,cColor);
1864 p.SetRefData(d);
1865 return p;
1866 }
1867
1868 // sets the font
1869 wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col )
1870 {
1871 if ( font.Ok() )
1872 {
1873 wxGraphicsFont p;
1874 p.SetRefData(new wxCairoFontData( this , font, col ));
1875 return p;
1876 }
1877 else
1878 return wxNullGraphicsFont;
1879 }
1880
1881 wxGraphicsBitmap wxCairoRenderer::CreateBitmap( const wxBitmap& bmp )
1882 {
1883 if ( bmp.Ok() )
1884 {
1885 wxGraphicsBitmap p;
1886 p.SetRefData(new wxCairoBitmapData( this , bmp ));
1887 return p;
1888 }
1889 else
1890 return wxNullGraphicsBitmap;
1891 }
1892
1893 wxGraphicsBitmap wxCairoRenderer::CreateBitmapFromNativeBitmap( void* bitmap )
1894 {
1895 if ( bitmap != NULL )
1896 {
1897 wxGraphicsBitmap p;
1898 p.SetRefData(new wxCairoBitmapData( this , (cairo_surface_t*) bitmap ));
1899 return p;
1900 }
1901 else
1902 return wxNullGraphicsBitmap;
1903 }
1904
1905 wxGraphicsBitmap
1906 wxCairoRenderer::CreateSubBitmap(const wxGraphicsBitmap& WXUNUSED(bitmap),
1907 wxDouble WXUNUSED(x),
1908 wxDouble WXUNUSED(y),
1909 wxDouble WXUNUSED(w),
1910 wxDouble WXUNUSED(h))
1911 {
1912 wxFAIL_MSG("wxCairoRenderer::CreateSubBitmap is not implemented.");
1913 return wxNullGraphicsBitmap;
1914 }
1915
1916 #endif // wxUSE_GRAPHICS_CONTEXT
wxWidgets (Impactor)