include/wx/graphics.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/graphics.h
   3 // Purpose:     graphics context header
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:
   7 // Copyright:   (c) Stefan Csomor
   8 // RCS-ID:      $Id$
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_GRAPHICS_H_
  13 #define _WX_GRAPHICS_H_
  14
  15 #if wxUSE_GRAPHICS_CONTEXT
  16
  17 #include "wx/geometry.h"
  18 #include "wx/dynarray.h"
  19
  20 class WXDLLIMPEXP_CORE wxWindowDC;
  21 class WXDLLIMPEXP_CORE wxMemoryDC;
  22 class WXDLLIMPEXP_CORE wxGraphicsContext;
  23 class WXDLLIMPEXP_CORE wxGraphicsPath;
  24 class WXDLLIMPEXP_CORE wxGraphicsMatrix;
  25 class WXDLLIMPEXP_CORE wxGraphicsFigure;
  26 class WXDLLIMPEXP_CORE wxGraphicsRenderer;
  27 class WXDLLIMPEXP_CORE wxGraphicsPen;
  28 class WXDLLIMPEXP_CORE wxGraphicsBrush;
  29 class WXDLLIMPEXP_CORE wxGraphicsFont;
  30
  31 /*
  32  * notes about the graphics context apis
  33  *
  34  * angles : are measured in radians, 0.0 being in direction of positiv x axis, PI/2 being
  35  * in direction of positive y axis.
  36  */
  37
  38 // Base class of all objects used for drawing in the new graphics API, the always point back to their
  39 // originating rendering engine, there is no dynamic unloading of a renderer currently allowed,
  40 // these references are not counted
  41
  42 //
  43 // The data used by objects like graphics pens etc is ref counted, in order to avoid unnecessary expensive
  44 // duplication. Any operation on a shared instance that results in a modified state, uncouples this
  45 // instance from the other instances that were shared - using copy on write semantics
  46 //
  47
  48 class WXDLLIMPEXP_CORE wxGraphicsObjectRefData : public wxObjectRefData
  49 {
  50 public :
  51     wxGraphicsObjectRefData( wxGraphicsRenderer* renderer );
  52     wxGraphicsObjectRefData( const wxGraphicsObjectRefData* data );
  53     wxGraphicsRenderer* GetRenderer() const ;
  54     virtual wxGraphicsObjectRefData* Clone() const ;
  55
  56 protected :
  57     wxGraphicsRenderer* m_renderer;
  58 } ;
  59
  60 class WXDLLIMPEXP_CORE wxGraphicsObject : public wxObject
  61 {
  62 public :
  63     wxGraphicsObject() ;
  64     wxGraphicsObject( wxGraphicsRenderer* renderer ) ;
  65     virtual ~wxGraphicsObject() ;
  66
  67     bool IsNull() const ;
  68
  69     // returns the renderer that was used to create this instance, or NULL if it has not been initialized yet
  70     wxGraphicsRenderer* GetRenderer() const ;
  71     wxGraphicsObjectRefData* GetGraphicsData() const ;
  72 protected :
  73     virtual wxObjectRefData* CreateRefData() const;
  74     virtual wxObjectRefData* CloneRefData(const wxObjectRefData* data) const;
  75
  76     DECLARE_DYNAMIC_CLASS(wxGraphicsObject);
  77 } ;
  78
  79 class WXDLLIMPEXP_CORE wxGraphicsPen : public wxGraphicsObject
  80 {
  81 public :
  82     wxGraphicsPen() {}
  83     virtual ~wxGraphicsPen() {}
  84 private :
  85     DECLARE_DYNAMIC_CLASS(wxGraphicsPen)
  86 } ;
  87
  88 extern WXDLLEXPORT_DATA(wxGraphicsPen) wxNullGraphicsPen;
  89
  90 class WXDLLIMPEXP_CORE wxGraphicsBrush : public wxGraphicsObject
  91 {
  92 public :
  93     wxGraphicsBrush() {}
  94     virtual ~wxGraphicsBrush() {}
  95 private :
  96     DECLARE_DYNAMIC_CLASS(wxGraphicsBrush)
  97 } ;
  98
  99 extern WXDLLEXPORT_DATA(wxGraphicsBrush) wxNullGraphicsBrush;
 100
 101 class WXDLLIMPEXP_CORE wxGraphicsFont : public wxGraphicsObject
 102 {
 103 public :
 104     wxGraphicsFont() {}
 105     virtual ~wxGraphicsFont() {}
 106 private :
 107     DECLARE_DYNAMIC_CLASS(wxGraphicsFont)
 108 } ;
 109
 110 extern WXDLLEXPORT_DATA(wxGraphicsFont) wxNullGraphicsFont;
 111
 112
 113 class WXDLLIMPEXP_CORE wxGraphicsMatrixData : public wxGraphicsObjectRefData
 114 {
 115 public :
 116     wxGraphicsMatrixData( wxGraphicsRenderer* renderer) :
 117        wxGraphicsObjectRefData(renderer) {}
 118
 119        virtual ~wxGraphicsMatrixData() {}
 120
 121        // concatenates the matrix
 122        virtual void Concat( const wxGraphicsMatrixData *t ) = 0;
 123
 124        // sets the matrix to the respective values
 125        virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 126            wxDouble tx=0.0, wxDouble ty=0.0) = 0;
 127
 128        // makes this the inverse matrix
 129        virtual void Invert() = 0;
 130
 131        // returns true if the elements of the transformation matrix are equal ?
 132        virtual bool IsEqual( const wxGraphicsMatrixData* t) const  = 0;
 133
 134        // return true if this is the identity matrix
 135        virtual bool IsIdentity() const = 0;
 136
 137        //
 138        // transformation
 139        //
 140
 141        // add the translation to this matrix
 142        virtual void Translate( wxDouble dx , wxDouble dy ) = 0;
 143
 144        // add the scale to this matrix
 145        virtual void Scale( wxDouble xScale , wxDouble yScale ) = 0;
 146
 147        // add the rotation to this matrix (radians)
 148        virtual void Rotate( wxDouble angle ) = 0;
 149
 150        //
 151        // apply the transforms
 152        //
 153
 154        // applies that matrix to the point
 155        virtual void TransformPoint( wxDouble *x, wxDouble *y ) const = 0;
 156
 157        // applies the matrix except for translations
 158        virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const =0;
 159
 160        // returns the native representation
 161        virtual void * GetNativeMatrix() const = 0;
 162 } ;
 163
 164 class WXDLLIMPEXP_CORE wxGraphicsMatrix : public wxGraphicsObject
 165 {
 166 public :
 167     wxGraphicsMatrix() {}
 168
 169     virtual ~wxGraphicsMatrix() {}
 170
 171     // concatenates the matrix
 172     virtual void Concat( const wxGraphicsMatrix *t );
 173     void Concat( const wxGraphicsMatrix &t ) { Concat( &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     // makes this the inverse matrix
 180     virtual void Invert();
 181
 182     // returns true if the elements of the transformation matrix are equal ?
 183     virtual bool IsEqual( const wxGraphicsMatrix* t) const;
 184     bool IsEqual( const wxGraphicsMatrix& t) const { return IsEqual( &t ); }
 185
 186     // return true if this is the identity matrix
 187     virtual bool IsIdentity() const;
 188
 189     //
 190     // transformation
 191     //
 192
 193     // add the translation to this matrix
 194     virtual void Translate( wxDouble dx , wxDouble dy );
 195
 196     // add the scale to this matrix
 197     virtual void Scale( wxDouble xScale , wxDouble yScale );
 198
 199     // add the rotation to this matrix (radians)
 200     virtual void Rotate( wxDouble angle );
 201
 202     //
 203     // apply the transforms
 204     //
 205
 206     // applies that matrix to the point
 207     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 208
 209     // applies the matrix except for translations
 210     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 211
 212     // returns the native representation
 213     virtual void * GetNativeMatrix() const;
 214
 215     const wxGraphicsMatrixData* GetMatrixData() const
 216     { return (const wxGraphicsMatrixData*) GetRefData(); }
 217     wxGraphicsMatrixData* GetMatrixData()
 218     { return (wxGraphicsMatrixData*) GetRefData(); }
 219
 220 private :
 221     DECLARE_DYNAMIC_CLASS(wxGraphicsMatrix)
 222 } ;
 223
 224 extern WXDLLEXPORT_DATA(wxGraphicsMatrix) wxNullGraphicsMatrix;
 225
 226 class WXDLLIMPEXP_CORE wxGraphicsPathData : public wxGraphicsObjectRefData
 227 {
 228 public :
 229     wxGraphicsPathData(wxGraphicsRenderer* renderer) : wxGraphicsObjectRefData(renderer) {}
 230     virtual ~wxGraphicsPathData() {}
 231
 232     //
 233     // These are the path primitives from which everything else can be constructed
 234     //
 235
 236     // begins a new subpath at (x,y)
 237     virtual void MoveToPoint( wxDouble x, wxDouble y ) = 0;
 238
 239     // adds a straight line from the current point to (x,y)
 240     virtual void AddLineToPoint( wxDouble x, wxDouble y ) = 0;
 241
 242     // adds a cubic Bezier curve from the current point, using two control points and an end point
 243     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y ) = 0;
 244
 245     // adds another path
 246     virtual void AddPath( const wxGraphicsPathData* path ) =0;
 247
 248     // closes the current sub-path
 249     virtual void CloseSubpath() = 0;
 250
 251     // gets the last point of the current path, (0,0) if not yet set
 252     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const = 0;
 253
 254     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 255     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) = 0;
 256
 257     //
 258     // These are convenience functions which - if not available natively will be assembled
 259     // using the primitives from above
 260     //
 261
 262     // adds a quadratic Bezier curve from the current point, using a control point and an end point
 263     virtual void AddQuadCurveToPoint( wxDouble cx, wxDouble cy, wxDouble x, wxDouble y );
 264
 265     // appends a rectangle as a new closed subpath
 266     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 267
 268     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 269     virtual void AddCircle( wxDouble x, wxDouble y, wxDouble r );
 270
 271     // appends 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)
 272     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r ) ;
 273
 274     // appends an ellipse
 275     virtual void AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
 276
 277     // appends a rounded rectangle
 278     virtual void AddRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);
 279
 280     // returns the native path
 281     virtual void * GetNativePath() const = 0;
 282
 283     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 284     virtual void UnGetNativePath(void *p) const= 0;
 285
 286     // transforms each point of this path by the matrix
 287     virtual void Transform( const wxGraphicsMatrixData* matrix ) =0;
 288
 289     // gets the bounding box enclosing all points (possibly including control points)
 290     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const=0;
 291
 292     virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxODDEVEN_RULE) const=0;
 293 };
 294
 295 class WXDLLIMPEXP_CORE wxGraphicsPath : public wxGraphicsObject
 296 {
 297 public :
 298     wxGraphicsPath()  {}
 299     virtual ~wxGraphicsPath() {}
 300
 301     //
 302     // These are the path primitives from which everything else can be constructed
 303     //
 304
 305     // begins a new subpath at (x,y)
 306     virtual void MoveToPoint( wxDouble x, wxDouble y );
 307     void MoveToPoint( const wxPoint2DDouble& p);
 308
 309     // adds a straight line from the current point to (x,y)
 310     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 311     void AddLineToPoint( const wxPoint2DDouble& p);
 312
 313     // adds a cubic Bezier curve from the current point, using two control points and an end point
 314     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y ) ;
 315     void AddCurveToPoint( const wxPoint2DDouble& c1, const wxPoint2DDouble& c2, const wxPoint2DDouble& e);
 316
 317     // adds another path
 318     virtual void AddPath( const wxGraphicsPath& path );
 319
 320     // closes the current sub-path
 321     virtual void CloseSubpath() ;
 322
 323     // gets the last point of the current path, (0,0) if not yet set
 324     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 325     wxPoint2DDouble GetCurrentPoint() const;
 326
 327     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 328     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 329     void AddArc( const wxPoint2DDouble& c, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise);
 330
 331     //
 332     // These are convenience functions which - if not available natively will be assembled
 333     // using the primitives from above
 334     //
 335
 336     // adds a quadratic Bezier curve from the current point, using a control point and an end point
 337     virtual void AddQuadCurveToPoint( wxDouble cx, wxDouble cy, wxDouble x, wxDouble y );
 338
 339     // appends a rectangle as a new closed subpath
 340     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 341
 342     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 343     virtual void AddCircle( wxDouble x, wxDouble y, wxDouble r );
 344
 345     // appends 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)
 346     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r ) ;
 347
 348     // appends an ellipse
 349     virtual void AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
 350
 351     // appends a rounded rectangle
 352     virtual void AddRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);
 353
 354     // returns the native path
 355     virtual void * GetNativePath() const;
 356
 357     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 358     virtual void UnGetNativePath(void *p)const;
 359
 360     // transforms each point of this path by the matrix
 361     virtual void Transform( const wxGraphicsMatrix& matrix );
 362
 363     // gets the bounding box enclosing all points (possibly including control points)
 364     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h)const;
 365     wxRect2DDouble GetBox()const;
 366
 367     virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxODDEVEN_RULE)const;
 368     bool Contains( const wxPoint2DDouble& c, int fillStyle = wxODDEVEN_RULE)const;
 369
 370     const wxGraphicsPathData* GetPathData() const
 371     { return (const wxGraphicsPathData*) GetRefData(); }
 372     wxGraphicsPathData* GetPathData()
 373     { return (wxGraphicsPathData*) GetRefData(); }
 374
 375 private :
 376     DECLARE_DYNAMIC_CLASS(wxGraphicsPath)
 377 } ;
 378
 379 extern WXDLLEXPORT_DATA(wxGraphicsPath) wxNullGraphicsPath;
 380
 381
 382 class WXDLLIMPEXP_CORE wxGraphicsContext : public wxGraphicsObject
 383 {
 384 public:
 385     wxGraphicsContext(wxGraphicsRenderer* renderer);
 386
 387     virtual ~wxGraphicsContext();
 388
 389     static wxGraphicsContext* Create( const wxWindowDC& dc) ;
 390
 391 #ifdef __WXMSW__
 392     static wxGraphicsContext * Create( const wxMemoryDC& dc) ;
 393 #endif
 394
 395     static wxGraphicsContext* CreateFromNative( void * context ) ;
 396
 397     static wxGraphicsContext* CreateFromNativeWindow( void * window ) ;
 398
 399     static wxGraphicsContext* Create( wxWindow* window ) ;
 400
 401     // create a context that can be used for measuring texts only, no drawing allowed
 402     static wxGraphicsContext * Create();
 403
 404     wxGraphicsPath CreatePath() const;
 405
 406     virtual wxGraphicsPen CreatePen(const wxPen& pen) const;
 407
 408     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) const;
 409
 410     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
 411     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 412         const wxColour&c1, const wxColour&c2) const;
 413
 414     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
 415     // with radius r and color cColor
 416     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 417         const wxColour &oColor, const wxColour &cColor) const;
 418
 419     // sets the font
 420     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) const;
 421
 422     // create a 'native' matrix corresponding to these values
 423     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 424         wxDouble tx=0.0, wxDouble ty=0.0) const;
 425
 426     // push the current state of the context, ie the transformation matrix on a stack
 427     virtual void PushState() = 0;
 428
 429     // pops a stored state from the stack
 430     virtual void PopState() = 0;
 431
 432     // clips drawings to the region, combined to current clipping region
 433     virtual void Clip( const wxRegion &region ) = 0;
 434
 435     // clips drawings to the rect
 436     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
 437
 438     // resets the clipping to original extent
 439     virtual void ResetClip() = 0 ;
 440
 441     // returns the native context
 442     virtual void * GetNativeContext() = 0;
 443
 444     // returns the current logical function
 445     virtual int GetLogicalFunction() const { return m_logicalFunction; }
 446
 447     // sets the current logical function, returns true if it supported
 448     virtual bool SetLogicalFunction(int function) ;
 449
 450     //
 451     // transformation : changes the current transformation matrix CTM of the context
 452     //
 453
 454     // translate
 455     virtual void Translate( wxDouble dx , wxDouble dy ) = 0;
 456
 457     // scale
 458     virtual void Scale( wxDouble xScale , wxDouble yScale ) = 0;
 459
 460     // rotate (radians)
 461     virtual void Rotate( wxDouble angle ) = 0;
 462
 463     // concatenates this transform with the current transform of this context
 464     virtual void ConcatTransform( const wxGraphicsMatrix& matrix ) = 0;
 465
 466     // sets the transform of this context
 467     virtual void SetTransform( const wxGraphicsMatrix& matrix ) = 0;
 468
 469     // gets the matrix of this context
 470     virtual wxGraphicsMatrix GetTransform() const = 0;
 471     //
 472     // setting the paint
 473     //
 474
 475     // sets the pen
 476     virtual void SetPen( const wxGraphicsPen& pen );
 477
 478     void SetPen( const wxPen& pen );
 479
 480     // sets the brush for filling
 481     virtual void SetBrush( const wxGraphicsBrush& brush );
 482
 483     void SetBrush( const wxBrush& brush );
 484
 485     // sets the font
 486     virtual void SetFont( const wxGraphicsFont& font );
 487
 488     void SetFont( const wxFont& font, const wxColour& colour );
 489
 490
 491     // strokes along a path with the current pen
 492     virtual void StrokePath( const wxGraphicsPath& path ) = 0;
 493
 494     // fills a path with the current brush
 495     virtual void FillPath( const wxGraphicsPath& path, int fillStyle = wxODDEVEN_RULE ) = 0;
 496
 497     // draws a path by first filling and then stroking
 498     virtual void DrawPath( const wxGraphicsPath& path, int fillStyle = wxODDEVEN_RULE );
 499
 500     //
 501     // text
 502     //
 503
 504     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y ) = 0;
 505
 506     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle );
 507
 508     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, const wxGraphicsBrush& backgroundBrush ) ;
 509
 510     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle, const wxGraphicsBrush& backgroundBrush );
 511
 512     virtual void GetTextExtent( const wxString &text, wxDouble *width, wxDouble *height,
 513         wxDouble *descent, wxDouble *externalLeading ) const  = 0;
 514
 515     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const = 0;
 516
 517     //
 518     // image support
 519     //
 520
 521     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
 522
 523     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
 524
 525     //
 526     // convenience methods
 527     //
 528
 529     // strokes a single line
 530     virtual void StrokeLine( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2);
 531
 532     // stroke lines connecting each of the points
 533     virtual void StrokeLines( size_t n, const wxPoint2DDouble *points);
 534
 535     // stroke disconnected lines from begin to end points
 536     virtual void StrokeLines( size_t n, const wxPoint2DDouble *beginPoints, const wxPoint2DDouble *endPoints);
 537
 538     // draws a polygon
 539     virtual void DrawLines( size_t n, const wxPoint2DDouble *points, int fillStyle = wxODDEVEN_RULE );
 540
 541     // draws a polygon
 542     virtual void DrawRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
 543
 544     // draws an ellipse
 545     virtual void DrawEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
 546
 547     // draws a rounded rectangle
 548     virtual void DrawRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);
 549
 550      // wrappers using wxPoint2DDouble TODO
 551
 552     // helper to determine if a 0.5 offset should be applied for the drawing operation
 553     virtual bool ShouldOffset() const { return false; }
 554
 555 protected :
 556
 557     wxGraphicsPen m_pen;
 558     wxGraphicsBrush m_brush;
 559     wxGraphicsFont m_font;
 560     int m_logicalFunction;
 561
 562 private :
 563     DECLARE_NO_COPY_CLASS(wxGraphicsContext)
 564     DECLARE_ABSTRACT_CLASS(wxGraphicsContext)
 565 };
 566
 567 #if 0
 568
 569 //
 570 // A graphics figure allows to cache path, pen etc creations, also will be a basis for layering/grouping elements
 571 //
 572
 573 class WXDLLIMPEXP_CORE wxGraphicsFigure : public wxGraphicsObject
 574 {
 575 public :
 576     wxGraphicsFigure(wxGraphicsRenderer* renderer) ;
 577
 578     virtual ~wxGraphicsFigure() ;
 579
 580     void SetPath( wxGraphicsMatrix* matrix );
 581
 582     void SetMatrix( wxGraphicsPath* path);
 583
 584     // draws this object on the context
 585     virtual void Draw( wxGraphicsContext* cg );
 586
 587     // returns the path of this object
 588     wxGraphicsPath* GetPath() { return m_path; }
 589
 590     // returns the transformation matrix of this object, may be null if there is no transformation necessary
 591     wxGraphicsMatrix* GetMatrix() { return m_matrix; }
 592
 593 private :
 594     wxGraphicsMatrix* m_matrix;
 595     wxGraphicsPath* m_path;
 596
 597     DECLARE_DYNAMIC_CLASS(wxGraphicsFigure)
 598 } ;
 599
 600 #endif
 601
 602 //
 603 // The graphics renderer is the instance corresponding to the rendering engine used, eg there is ONE core graphics renderer
 604 // instance on OSX. This instance is pointed back to by all objects created by it. Therefore you can create eg additional
 605 // paths at any point from a given matrix etc.
 606 //
 607
 608 class WXDLLIMPEXP_CORE wxGraphicsRenderer : public wxObject
 609 {
 610 public :
 611     wxGraphicsRenderer() {}
 612
 613     virtual ~wxGraphicsRenderer() {}
 614
 615     static wxGraphicsRenderer* GetDefaultRenderer();
 616
 617     // Context
 618
 619     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc) = 0 ;
 620 #ifdef __WXMSW__
 621     virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc) = 0 ;
 622 #endif
 623     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context ) = 0;
 624
 625     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window ) = 0;
 626
 627     virtual wxGraphicsContext * CreateContext( wxWindow* window ) = 0;
 628
 629     // create a context that can be used for measuring texts only, no drawing allowed
 630     virtual wxGraphicsContext * CreateMeasuringContext() = 0;
 631
 632     // Path
 633
 634     virtual wxGraphicsPath CreatePath() = 0;
 635
 636     // Matrix
 637
 638     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 639         wxDouble tx=0.0, wxDouble ty=0.0) = 0;
 640
 641     // Paints
 642
 643     virtual wxGraphicsPen CreatePen(const wxPen& pen) = 0 ;
 644
 645     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) = 0 ;
 646
 647     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
 648     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 649         const wxColour&c1, const wxColour&c2) = 0;
 650
 651     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
 652     // with radius r and color cColor
 653     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 654         const wxColour &oColor, const wxColour &cColor) = 0;
 655
 656    // sets the font
 657     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) = 0;
 658
 659 private :
 660     DECLARE_NO_COPY_CLASS(wxGraphicsRenderer)
 661     DECLARE_ABSTRACT_CLASS(wxGraphicsRenderer)
 662 } ;
 663
 664 #endif
 665
 666 #endif // _WX_GRAPHICS_H_