check that the version of __sync_sub_and_fetch that returns a value is supported...

[wxWidgets.git] / include / wx / graphics.h

diff --git a/include/wx/graphics.h b/include/wx/graphics.h
old mode 100755 (executable)
new mode 100644 (file)
index 0ef6bb5..4390621
--- a/include/wx/graphics.h
+++ b/include/wx/graphics.h
@@ -17,15 +17,16 @@
 #include "wx/geometry.h"
 #include "wx/dynarray.h"
 
 #include "wx/geometry.h"
 #include "wx/dynarray.h"
 

-class WXDLLIMPEXP_CORE wxWindowDC;
-class WXDLLIMPEXP_CORE wxGraphicsContext;
-class WXDLLIMPEXP_CORE wxGraphicsPath;
-class WXDLLIMPEXP_CORE wxGraphicsMatrix;
-class WXDLLIMPEXP_CORE wxGraphicsFigure;
-class WXDLLIMPEXP_CORE wxGraphicsRenderer;
-class WXDLLIMPEXP_CORE wxGraphicsPen;
-class WXDLLIMPEXP_CORE wxGraphicsBrush;
-class WXDLLIMPEXP_CORE wxGraphicsFont;
+class WXDLLIMPEXP_FWD_CORE wxWindowDC;
+class WXDLLIMPEXP_FWD_CORE wxMemoryDC;
+class WXDLLIMPEXP_FWD_CORE wxGraphicsContext;
+class WXDLLIMPEXP_FWD_CORE wxGraphicsPath;
+class WXDLLIMPEXP_FWD_CORE wxGraphicsMatrix;
+class WXDLLIMPEXP_FWD_CORE wxGraphicsFigure;
+class WXDLLIMPEXP_FWD_CORE wxGraphicsRenderer;
+class WXDLLIMPEXP_FWD_CORE wxGraphicsPen;
+class WXDLLIMPEXP_FWD_CORE wxGraphicsBrush;
+class WXDLLIMPEXP_FWD_CORE wxGraphicsFont;

 
 /*
  * notes about the graphics context apis
 
 /*
  * notes about the graphics context apis


@@ -72,7 +73,7 @@ protected :
     virtual wxObjectRefData* CreateRefData() const;
     virtual wxObjectRefData* CloneRefData(const wxObjectRefData* data) const;
 
     virtual wxObjectRefData* CreateRefData() const;
     virtual wxObjectRefData* CloneRefData(const wxObjectRefData* data) const;
 

-    DECLARE_DYNAMIC_CLASS(wxGraphicsObject);
+    DECLARE_DYNAMIC_CLASS(wxGraphicsObject)

 } ;
 
 class WXDLLIMPEXP_CORE wxGraphicsPen : public wxGraphicsObject
 } ;
 
 class WXDLLIMPEXP_CORE wxGraphicsPen : public wxGraphicsObject


@@ -109,13 +110,132 @@ private :
 extern WXDLLEXPORT_DATA(wxGraphicsFont) wxNullGraphicsFont;
 
 
 extern WXDLLEXPORT_DATA(wxGraphicsFont) wxNullGraphicsFont;
 
 

-class WXDLLIMPEXP_CORE wxGraphicsPath : public wxGraphicsObject
+class WXDLLIMPEXP_CORE wxGraphicsMatrixData : public wxGraphicsObjectRefData

 {
 public :
 {
 public :

-    wxGraphicsPath(wxGraphicsRenderer* renderer) : wxGraphicsObject(renderer) {}
-    virtual ~wxGraphicsPath() {}
-    
-    virtual wxGraphicsPath *Clone() const = 0;
+    wxGraphicsMatrixData( wxGraphicsRenderer* renderer) : 
+       wxGraphicsObjectRefData(renderer) {}
+
+       virtual ~wxGraphicsMatrixData() {}
+
+       // concatenates the matrix
+       virtual void Concat( const wxGraphicsMatrixData *t ) = 0;
+
+       // sets the matrix to the respective values
+       virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0, 
+           wxDouble tx=0.0, wxDouble ty=0.0) = 0;
+
+       // gets the component valuess of the matrix
+       virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
+                        wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const = 0;
+       
+       // makes this the inverse matrix
+       virtual void Invert() = 0;
+
+       // returns true if the elements of the transformation matrix are equal ?
+       virtual bool IsEqual( const wxGraphicsMatrixData* t) const  = 0;
+
+       // return true if this is the identity matrix
+       virtual bool IsIdentity() const = 0;
+
+       //
+       // transformation
+       //
+
+       // add the translation to this matrix
+       virtual void Translate( wxDouble dx , wxDouble dy ) = 0;
+
+       // add the scale to this matrix
+       virtual void Scale( wxDouble xScale , wxDouble yScale ) = 0;
+
+       // add the rotation to this matrix (radians)
+       virtual void Rotate( wxDouble angle ) = 0;  
+
+       //
+       // apply the transforms
+       //
+
+       // applies that matrix to the point
+       virtual void TransformPoint( wxDouble *x, wxDouble *y ) const = 0;
+
+       // applies the matrix except for translations
+       virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const =0;
+
+       // returns the native representation
+       virtual void * GetNativeMatrix() const = 0;
+} ;
+
+class WXDLLIMPEXP_CORE wxGraphicsMatrix : public wxGraphicsObject
+{
+public :
+    wxGraphicsMatrix() {}
+
+    virtual ~wxGraphicsMatrix() {}
+
+    // concatenates the matrix
+    virtual void Concat( const wxGraphicsMatrix *t );
+    void Concat( const wxGraphicsMatrix &t ) { Concat( &t ); }
+
+    // sets the matrix to the respective values
+    virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0, 
+        wxDouble tx=0.0, wxDouble ty=0.0);
+
+    // gets the component valuess of the matrix
+    virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL,  wxDouble* c=NULL,
+                     wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
+       
+    // makes this the inverse matrix
+    virtual void Invert();
+
+    // returns true if the elements of the transformation matrix are equal ?
+    virtual bool IsEqual( const wxGraphicsMatrix* t) const;
+    bool IsEqual( const wxGraphicsMatrix& t) const { return IsEqual( &t ); }
+
+    // return true if this is the identity matrix
+    virtual bool IsIdentity() const;
+
+    //
+    // transformation
+    //
+
+    // add the translation to this matrix
+    virtual void Translate( wxDouble dx , wxDouble dy );
+
+    // add the scale to this matrix
+    virtual void Scale( wxDouble xScale , wxDouble yScale );
+
+    // add the rotation to this matrix (radians)
+    virtual void Rotate( wxDouble angle );  
+
+    //
+    // apply the transforms
+    //
+
+    // applies that matrix to the point
+    virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
+
+    // applies the matrix except for translations
+    virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
+
+    // returns the native representation
+    virtual void * GetNativeMatrix() const;
+
+    const wxGraphicsMatrixData* GetMatrixData() const 
+    { return (const wxGraphicsMatrixData*) GetRefData(); }
+    wxGraphicsMatrixData* GetMatrixData() 
+    { return (wxGraphicsMatrixData*) GetRefData(); }
+
+private :
+    DECLARE_DYNAMIC_CLASS(wxGraphicsMatrix)
+} ;
+
+extern WXDLLEXPORT_DATA(wxGraphicsMatrix) wxNullGraphicsMatrix;
+
+class WXDLLIMPEXP_CORE wxGraphicsPathData : public wxGraphicsObjectRefData
+{
+public :
+    wxGraphicsPathData(wxGraphicsRenderer* renderer) : wxGraphicsObjectRefData(renderer) {}
+    virtual ~wxGraphicsPathData() {}

 
     //
     // These are the path primitives from which everything else can be constructed
 
     //
     // These are the path primitives from which everything else can be constructed


@@ -123,29 +243,24 @@ public :
 
     // begins a new subpath at (x,y)
     virtual void MoveToPoint( wxDouble x, wxDouble y ) = 0;
 
     // begins a new subpath at (x,y)
     virtual void MoveToPoint( wxDouble x, wxDouble y ) = 0;

-    void MoveToPoint( const wxPoint2DDouble& p);

 
     // adds a straight line from the current point to (x,y) 
     virtual void AddLineToPoint( wxDouble x, wxDouble y ) = 0;
 
     // adds a straight line from the current point to (x,y) 
     virtual void AddLineToPoint( wxDouble x, wxDouble y ) = 0;

-    void AddLineToPoint( const wxPoint2DDouble& p);

 
     // adds a cubic Bezier curve from the current point, using two control points and an end point
     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y ) = 0;
 
     // adds a cubic Bezier curve from the current point, using two control points and an end point
     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y ) = 0;

-    void AddCurveToPoint( const wxPoint2DDouble& c1, const wxPoint2DDouble& c2, const wxPoint2DDouble& e);
-    
+

     // adds another path
     // adds another path

-    virtual void AddPath( const wxGraphicsPath* path ) =0;
+    virtual void AddPath( const wxGraphicsPathData* path ) =0;

 
     // closes the current sub-path
     virtual void CloseSubpath() = 0;
 
     // gets the last point of the current path, (0,0) if not yet set
 
     // closes the current sub-path
     virtual void CloseSubpath() = 0;
 
     // gets the last point of the current path, (0,0) if not yet set

-    virtual void GetCurrentPoint( wxDouble& x, wxDouble&y) = 0;
-    wxPoint2DDouble GetCurrentPoint();
+    virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const = 0;

 
     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) = 0;
 
     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) = 0;

-    void AddArc( const wxPoint2DDouble& c, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise);

 
     //
     // These are convenience functions which - if not available natively will be assembled 
 
     //
     // These are convenience functions which - if not available natively will be assembled 


@@ -163,7 +278,7 @@ public :
 
     // 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)
     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r ) ;
 
     // 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)
     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r ) ;

-    
+

     // appends an ellipse
     virtual void AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
 
     // appends an ellipse
     virtual void AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
 


@@ -172,85 +287,106 @@ public :
 
     // returns the native path
     virtual void * GetNativePath() const = 0;
 
     // returns the native path
     virtual void * GetNativePath() const = 0;

-    
+

     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)

-    virtual void UnGetNativePath(void *p) = 0;
-    
+    virtual void UnGetNativePath(void *p) const= 0;
+

     // transforms each point of this path by the matrix
     // transforms each point of this path by the matrix

-    virtual void Transform( wxGraphicsMatrix* matrix ) =0;
-    
+    virtual void Transform( const wxGraphicsMatrixData* matrix ) =0;
+

     // gets the bounding box enclosing all points (possibly including control points)
     // gets the bounding box enclosing all points (possibly including control points)

-    virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) =0;
-    wxRect2DDouble GetBox();
-    
-    virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxWINDING_RULE) =0;
-    bool Contains( const wxPoint2DDouble& c, int fillStyle = wxWINDING_RULE);
-    
-    DECLARE_NO_COPY_CLASS(wxGraphicsPath)
-    DECLARE_ABSTRACT_CLASS(wxGraphicsPath)
+    virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const=0;
+
+    virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxODDEVEN_RULE) const=0;

 };
 
 };
 

-class WXDLLIMPEXP_CORE wxGraphicsMatrix : public wxGraphicsObject
+class WXDLLIMPEXP_CORE wxGraphicsPath : public wxGraphicsObject

 {
 public :
 {
 public :

-    wxGraphicsMatrix(wxGraphicsRenderer* renderer) : wxGraphicsObject(renderer) {}
-    
-    virtual ~wxGraphicsMatrix() {}
+    wxGraphicsPath()  {}
+    virtual ~wxGraphicsPath() {}

     
     

-    virtual wxGraphicsMatrix *Clone() const = 0;
+    //
+    // These are the path primitives from which everything else can be constructed
+    //

 
 

-    // concatenates the matrix
-    virtual void Concat( const wxGraphicsMatrix *t ) = 0;
-    void Concat( const wxGraphicsMatrix &t ) { Concat( &t ); }
-    
-    // copies the passed in matrix
-    virtual void Copy( const wxGraphicsMatrix *t )  = 0;
-    void Copy( const wxGraphicsMatrix &t ) { Copy( &t ); }
+    // begins a new subpath at (x,y)
+    virtual void MoveToPoint( wxDouble x, wxDouble y );
+    void MoveToPoint( const wxPoint2DDouble& p);

 
 

-    // sets the matrix to the respective values
-    virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0, 
-        wxDouble tx=0.0, wxDouble ty=0.0) = 0;
+    // adds a straight line from the current point to (x,y) 
+    virtual void AddLineToPoint( wxDouble x, wxDouble y );
+    void AddLineToPoint( const wxPoint2DDouble& p);

 
 

-    // makes this the inverse matrix
-    virtual void Invert() = 0;
-    
-    // returns true if the elements of the transformation matrix are equal ?
-    virtual bool IsEqual( const wxGraphicsMatrix* t) const  = 0;
-    bool IsEqual( const wxGraphicsMatrix& t) const { return IsEqual( &t ); }
-    
-    // return true if this is the identity matrix
-    virtual bool IsIdentity()  = 0;
+    // adds a cubic Bezier curve from the current point, using two control points and an end point
+    virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y ) ;
+    void AddCurveToPoint( const wxPoint2DDouble& c1, const wxPoint2DDouble& c2, const wxPoint2DDouble& e);

     
     

+    // adds another path
+    virtual void AddPath( const wxGraphicsPath& path );
+
+    // closes the current sub-path
+    virtual void CloseSubpath() ;
+
+    // gets the last point of the current path, (0,0) if not yet set
+    virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
+    wxPoint2DDouble GetCurrentPoint() const;
+
+    // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
+    virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
+    void AddArc( const wxPoint2DDouble& c, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise);
+

     //
     //

-    // transformation
+    // These are convenience functions which - if not available natively will be assembled 
+    // using the primitives from above

     //
     //

+
+    // adds a quadratic Bezier curve from the current point, using a control point and an end point
+    virtual void AddQuadCurveToPoint( wxDouble cx, wxDouble cy, wxDouble x, wxDouble y );
+
+    // appends a rectangle as a new closed subpath 
+    virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
+
+    // appends an ellipsis as a new closed subpath fitting the passed rectangle
+    virtual void AddCircle( wxDouble x, wxDouble y, wxDouble r );
+
+    // 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)
+    virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r ) ;

     
     

-    // add the translation to this matrix
-    virtual void Translate( wxDouble dx , wxDouble dy ) = 0;
+    // appends an ellipse
+    virtual void AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);

 
 

-    // add the scale to this matrix
-    virtual void Scale( wxDouble xScale , wxDouble yScale ) = 0;
+    // appends a rounded rectangle
+    virtual void AddRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);

 
 

-    // add the rotation to this matrix (radians)
-    virtual void Rotate( wxDouble angle ) = 0;  
+    // returns the native path
+    virtual void * GetNativePath() const;

     
     

-    //
-    // apply the transforms
-    //
+    // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
+    virtual void UnGetNativePath(void *p)const;

     
     

-    // applies that matrix to the point
-    virtual void TransformPoint( wxDouble *x, wxDouble *y ) = 0;
+    // transforms each point of this path by the matrix
+    virtual void Transform( const wxGraphicsMatrix& matrix );

     
     

-    // applies the matrix except for translations
-    virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) =0;
+    // gets the bounding box enclosing all points (possibly including control points)
+    virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h)const;
+    wxRect2DDouble GetBox()const;

     
     

-    // returns the native representation
-    virtual void * GetNativeMatrix() const = 0;
+    virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxODDEVEN_RULE)const;
+    bool Contains( const wxPoint2DDouble& c, int fillStyle = wxODDEVEN_RULE)const;

     
     

-    DECLARE_NO_COPY_CLASS(wxGraphicsMatrix)
-    DECLARE_ABSTRACT_CLASS(wxGraphicsMatrix)
+    const wxGraphicsPathData* GetPathData() const 
+    { return (const wxGraphicsPathData*) GetRefData(); }
+    wxGraphicsPathData* GetPathData() 
+    { return (wxGraphicsPathData*) GetRefData(); }
+
+private :
+    DECLARE_DYNAMIC_CLASS(wxGraphicsPath)

 } ;
 
 } ;
 

+extern WXDLLEXPORT_DATA(wxGraphicsPath) wxNullGraphicsPath;
+
+

 class WXDLLIMPEXP_CORE wxGraphicsContext : public wxGraphicsObject
 {
 public:
 class WXDLLIMPEXP_CORE wxGraphicsContext : public wxGraphicsObject
 {
 public:


@@ -259,34 +395,54 @@ public:
     virtual ~wxGraphicsContext();
     
     static wxGraphicsContext* Create( const wxWindowDC& dc) ;
     virtual ~wxGraphicsContext();
     
     static wxGraphicsContext* Create( const wxWindowDC& dc) ;

-    
+    static wxGraphicsContext * Create( const wxMemoryDC& dc) ;
+

     static wxGraphicsContext* CreateFromNative( void * context ) ;
 
     static wxGraphicsContext* CreateFromNativeWindow( void * window ) ;
 
     static wxGraphicsContext* Create( wxWindow* window ) ;
 
     static wxGraphicsContext* CreateFromNative( void * context ) ;
 
     static wxGraphicsContext* CreateFromNativeWindow( void * window ) ;
 
     static wxGraphicsContext* Create( wxWindow* window ) ;
 

-    wxGraphicsPath * CreatePath();
+    // create a context that can be used for measuring texts only, no drawing allowed
+    static wxGraphicsContext * Create();
+
+    // begin a new document (relevant only for printing / pdf etc) if there is a progress dialog, message will be shown
+    virtual bool StartDoc( const wxString& message ) ;
+    
+    // done with that document (relevant only for printing / pdf etc) 
+    virtual void EndDoc();
+
+    // opens a new page  (relevant only for printing / pdf etc) with the given size in points 
+    // (if both are null the default page size will be used)
+    virtual void StartPage( wxDouble width = 0, wxDouble height = 0 );
+    
+    // ends the current page  (relevant only for printing / pdf etc) 
+    virtual void EndPage();
+    
+    // make sure that the current content of this context is immediately visible
+    virtual void Flush();
+
+    wxGraphicsPath CreatePath() const;

     
     

-    virtual wxGraphicsPen CreatePen(const wxPen& pen);
+    virtual wxGraphicsPen CreatePen(const wxPen& pen) const;

     
     

-    virtual wxGraphicsBrush CreateBrush(const wxBrush& brush );
+    virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) const;

     
     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, 
     
     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, 

-        const wxColour&c1, const wxColour&c2);
+        const wxColour&c1, const wxColour&c2) const;

 
     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc) 
     // with radius r and color cColor
     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 
     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc) 
     // with radius r and color cColor
     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,

-        const wxColour &oColor, const wxColour &cColor);
+        const wxColour &oColor, const wxColour &cColor) const;

 
     // sets the font
 
     // sets the font

-    virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK );
+    virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) const;

 
     // create a 'native' matrix corresponding to these values
 
     // create a 'native' matrix corresponding to these values

-    virtual wxGraphicsMatrix* CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0, 
-        wxDouble tx=0.0, wxDouble ty=0.0);
+    virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0, 
+        wxDouble tx=0.0, wxDouble ty=0.0) const;

     
     // push the current state of the context, ie the transformation matrix on a stack
     virtual void PushState() = 0;
     
     // push the current state of the context, ie the transformation matrix on a stack
     virtual void PushState() = 0;


@@ -294,10 +450,10 @@ public:
     // pops a stored state from the stack
     virtual void PopState() = 0;
 
     // pops a stored state from the stack
     virtual void PopState() = 0;
 

-    // clips drawings to the region, combined to current clipping region
+    // clips drawings to the region intersected with the current clipping region

     virtual void Clip( const wxRegion &region ) = 0;
 
     virtual void Clip( const wxRegion &region ) = 0;
 

-    // clips drawings to the rect
+    // clips drawings to the rect intersected with the current clipping region

     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
     
     // resets the clipping to original extent
     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
     
     // resets the clipping to original extent


@@ -306,6 +462,25 @@ public:
     // returns the native context
     virtual void * GetNativeContext() = 0;
 
     // returns the native context
     virtual void * GetNativeContext() = 0;
 

+    // returns the current logical function
+    virtual int GetLogicalFunction() const { return m_logicalFunction; }
+    
+    // sets the current logical function, returns true if it supported
+    virtual bool SetLogicalFunction(int function) ;
+
+    // returns the size of the graphics context in device coordinates
+    virtual void GetSize( wxDouble* width, wxDouble* height);
+
+    // returns the resolution of the graphics context in device points per inch
+    virtual void GetDPI( wxDouble* dpiX, wxDouble* dpiY);
+    
+#if 0
+    // sets the current alpha on this context
+    virtual void SetAlpha( wxDouble alpha );
+    
+    // returns the alpha on this context
+    virtual wxDouble GetAlpha() const;
+#endif

     //
     // transformation : changes the current transformation matrix CTM of the context
     //
     //
     // transformation : changes the current transformation matrix CTM of the context
     //


@@ -320,13 +495,13 @@ public:
     virtual void Rotate( wxDouble angle ) = 0;
     
     // concatenates this transform with the current transform of this context
     virtual void Rotate( wxDouble angle ) = 0;
     
     // concatenates this transform with the current transform of this context

-    virtual void ConcatTransform( const wxGraphicsMatrix* matrix ) = 0;
+    virtual void ConcatTransform( const wxGraphicsMatrix& matrix ) = 0;

 
     // sets the transform of this context
 
     // sets the transform of this context

-    virtual void SetTransform( const wxGraphicsMatrix* matrix ) = 0;
+    virtual void SetTransform( const wxGraphicsMatrix& matrix ) = 0;

 
     // gets the matrix of this context
 
     // gets the matrix of this context

-    virtual void GetTransform( wxGraphicsMatrix* matrix ) = 0;
+    virtual wxGraphicsMatrix GetTransform() const = 0;

     //
     // setting the paint
     //
     //
     // setting the paint
     //


@@ -348,13 +523,13 @@ public:
 
     
     // strokes along a path with the current pen
 
     
     // strokes along a path with the current pen

-    virtual void StrokePath( const wxGraphicsPath *path ) = 0;
+    virtual void StrokePath( const wxGraphicsPath& path ) = 0;

 
     // fills a path with the current brush
 
     // fills a path with the current brush

-    virtual void FillPath( const wxGraphicsPath *path, int fillStyle = wxWINDING_RULE ) = 0;
+    virtual void FillPath( const wxGraphicsPath& path, int fillStyle = wxODDEVEN_RULE ) = 0;

 
     // draws a path by first filling and then stroking
 
     // draws a path by first filling and then stroking

-    virtual void DrawPath( const wxGraphicsPath *path, int fillStyle = wxWINDING_RULE );
+    virtual void DrawPath( const wxGraphicsPath& path, int fillStyle = wxODDEVEN_RULE );

     
     //
     // text
     
     //
     // text


@@ -364,6 +539,10 @@ public:
 
     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle );
 
 
     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle );
 

+    virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, const wxGraphicsBrush& backgroundBrush ) ;
+
+    virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle, const wxGraphicsBrush& backgroundBrush );
+

     virtual void GetTextExtent( const wxString &text, wxDouble *width, wxDouble *height,
         wxDouble *descent, wxDouble *externalLeading ) const  = 0;
 
     virtual void GetTextExtent( const wxString &text, wxDouble *width, wxDouble *height,
         wxDouble *descent, wxDouble *externalLeading ) const  = 0;
 


@@ -391,7 +570,7 @@ public:
     virtual void StrokeLines( size_t n, const wxPoint2DDouble *beginPoints, const wxPoint2DDouble *endPoints);
 
     // draws a polygon
     virtual void StrokeLines( size_t n, const wxPoint2DDouble *beginPoints, const wxPoint2DDouble *endPoints);
 
     // draws a polygon

-    virtual void DrawLines( size_t n, const wxPoint2DDouble *points, int fillStyle = wxWINDING_RULE );
+    virtual void DrawLines( size_t n, const wxPoint2DDouble *points, int fillStyle = wxODDEVEN_RULE );

 
     // draws a polygon
     virtual void DrawRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
 
     // draws a polygon
     virtual void DrawRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h);


@@ -412,6 +591,7 @@ protected :
     wxGraphicsPen m_pen;
     wxGraphicsBrush m_brush;
     wxGraphicsFont m_font;
     wxGraphicsPen m_pen;
     wxGraphicsBrush m_brush;
     wxGraphicsFont m_font;

+    int m_logicalFunction;

 
 private :
     DECLARE_NO_COPY_CLASS(wxGraphicsContext)
 
 private :
     DECLARE_NO_COPY_CLASS(wxGraphicsContext)


@@ -471,6 +651,7 @@ public :
     // Context
 
     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc) = 0 ;
     // Context
 
     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc) = 0 ;

+    virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc) = 0 ;

     
     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context ) = 0;
 
     
     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context ) = 0;
 


@@ -478,13 +659,16 @@ public :
 
     virtual wxGraphicsContext * CreateContext( wxWindow* window ) = 0;
 
 
     virtual wxGraphicsContext * CreateContext( wxWindow* window ) = 0;
 

+    // create a context that can be used for measuring texts only, no drawing allowed
+    virtual wxGraphicsContext * CreateMeasuringContext() = 0;
+

     // Path
     
     // Path
     

-    virtual wxGraphicsPath * CreatePath() = 0;
+    virtual wxGraphicsPath CreatePath() = 0;

 
     // Matrix
     
 
     // Matrix
     

-    virtual wxGraphicsMatrix * CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0, 
+    virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0, 

         wxDouble tx=0.0, wxDouble ty=0.0) = 0;
         
     // Paints
         wxDouble tx=0.0, wxDouble ty=0.0) = 0;
         
     // Paints