Further performance optimizations

[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 a2d858d..f26ae66
--- a/include/wx/graphics.h
+++ b/include/wx/graphics.h
@@ -12,20 +12,24 @@
 #ifndef _WX_GRAPHICS_H_
 #define _WX_GRAPHICS_H_
 
 #ifndef _WX_GRAPHICS_H_
 #define _WX_GRAPHICS_H_
 

+#include "wx/defs.h"
+

 #if wxUSE_GRAPHICS_CONTEXT
 
 #include "wx/geometry.h"
 #include "wx/dynarray.h"
 
 #if wxUSE_GRAPHICS_CONTEXT
 
 #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;
+class WXDLLIMPEXP_FWD_CORE wxGraphicsBitmap;

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


@@ -37,92 +41,180 @@ class WXDLLIMPEXP_CORE wxGraphicsFont;
 // Base class of all objects used for drawing in the new graphics API, the always point back to their
 // originating rendering engine, there is no dynamic unloading of a renderer currently allowed, 
 // these references are not counted
 // Base class of all objects used for drawing in the new graphics API, the always point back to their
 // originating rendering engine, there is no dynamic unloading of a renderer currently allowed, 
 // these references are not counted

+
+//
+// The data used by objects like graphics pens etc is ref counted, in order to avoid unnecessary expensive
+// duplication. Any operation on a shared instance that results in a modified state, uncouples this
+// instance from the other instances that were shared - using copy on write semantics
+//

  
  

+class WXDLLIMPEXP_FWD_CORE wxGraphicsObjectRefData;
+class WXDLLIMPEXP_FWD_CORE wxGraphicsMatrixData;
+class WXDLLIMPEXP_FWD_CORE wxGraphicsPathData;
+

 class WXDLLIMPEXP_CORE wxGraphicsObject : public wxObject
 {
 public :
 class WXDLLIMPEXP_CORE wxGraphicsObject : public wxObject
 {
 public :

-    wxGraphicsObject( wxGraphicsRenderer* renderer = NULL ) : m_renderer(renderer) {}
+    wxGraphicsObject() ;
+    wxGraphicsObject( wxGraphicsRenderer* renderer ) ;
+    virtual ~wxGraphicsObject() ;

     
     

-    wxGraphicsObject( const wxGraphicsObject& obj ) : m_renderer(obj.GetRenderer()) {}
-    
-    virtual ~wxGraphicsObject() {}
-    
-    wxGraphicsRenderer* GetRenderer() const { return m_renderer ; }
+    bool IsNull() const ;
+
+    // returns the renderer that was used to create this instance, or NULL if it has not been initialized yet
+    wxGraphicsRenderer* GetRenderer() const ;
+    wxGraphicsObjectRefData* GetGraphicsData() const ;

 protected :
 protected :

-    wxGraphicsRenderer* m_renderer;
-    DECLARE_DYNAMIC_CLASS(wxGraphicsObject);
+    virtual wxObjectRefData* CreateRefData() const;
+    virtual wxObjectRefData* CloneRefData(const wxObjectRefData* data) const;
+
+    DECLARE_DYNAMIC_CLASS(wxGraphicsObject)

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

-    wxGraphicsPen(wxGraphicsRenderer* renderer) : wxGraphicsObject(renderer) {}
+    wxGraphicsPen() {}

     virtual ~wxGraphicsPen() {}
     virtual ~wxGraphicsPen() {}

-    virtual void Apply( wxGraphicsContext* context) = 0;
-    virtual wxDouble GetWidth() = 0;

 private :
 private :

-    DECLARE_NO_COPY_CLASS(wxGraphicsPen)
-    DECLARE_ABSTRACT_CLASS(wxGraphicsPen)
+    DECLARE_DYNAMIC_CLASS(wxGraphicsPen)

 } ;
 
 } ;
 

+extern WXDLLIMPEXP_DATA_CORE(wxGraphicsPen) wxNullGraphicsPen;
+

 class WXDLLIMPEXP_CORE wxGraphicsBrush : public wxGraphicsObject
 {
 public :
 class WXDLLIMPEXP_CORE wxGraphicsBrush : public wxGraphicsObject
 {
 public :

-    wxGraphicsBrush(wxGraphicsRenderer* renderer) : wxGraphicsObject(renderer) {}
+    wxGraphicsBrush() {}

     virtual ~wxGraphicsBrush() {}
     virtual ~wxGraphicsBrush() {}

-    virtual void Apply( wxGraphicsContext* context) = 0;

 private :
 private :

-    DECLARE_NO_COPY_CLASS(wxGraphicsBrush)
-    DECLARE_ABSTRACT_CLASS(wxGraphicsBrush)
+    DECLARE_DYNAMIC_CLASS(wxGraphicsBrush)

 } ;
 
 } ;
 

+extern WXDLLIMPEXP_DATA_CORE(wxGraphicsBrush) wxNullGraphicsBrush;
+

 class WXDLLIMPEXP_CORE wxGraphicsFont : public wxGraphicsObject
 {
 public :
 class WXDLLIMPEXP_CORE wxGraphicsFont : public wxGraphicsObject
 {
 public :

-    wxGraphicsFont(wxGraphicsRenderer* renderer) : wxGraphicsObject(renderer) {}
+    wxGraphicsFont() {}

     virtual ~wxGraphicsFont() {}
     virtual ~wxGraphicsFont() {}

-    virtual void Apply( wxGraphicsContext* context) = 0;

 private :
 private :

-    DECLARE_NO_COPY_CLASS(wxGraphicsFont)
-    DECLARE_ABSTRACT_CLASS(wxGraphicsFont)
+    DECLARE_DYNAMIC_CLASS(wxGraphicsFont)
+} ;
+
+extern WXDLLIMPEXP_DATA_CORE(wxGraphicsFont) wxNullGraphicsFont;
+
+class WXDLLIMPEXP_CORE wxGraphicsBitmap : public wxGraphicsObject
+{
+public :
+    wxGraphicsBitmap() {}
+    virtual ~wxGraphicsBitmap() {}
+private :
+    DECLARE_DYNAMIC_CLASS(wxGraphicsBitmap)
+} ;
+ 
+extern WXDLLIMPEXP_DATA_CORE(wxGraphicsBitmap) wxNullGraphicsBitmap;
+
+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 WXDLLIMPEXP_DATA_CORE(wxGraphicsMatrix) wxNullGraphicsMatrix;
+

 class WXDLLIMPEXP_CORE wxGraphicsPath : public wxGraphicsObject
 {
 public :
 class WXDLLIMPEXP_CORE wxGraphicsPath : public wxGraphicsObject
 {
 public :

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

     virtual ~wxGraphicsPath() {}
     
     virtual ~wxGraphicsPath() {}
     

-    virtual wxGraphicsPath *Clone() const = 0;
-

     //
     // These are the path primitives from which everything else can be constructed
     //
 
     // begins a new subpath at (x,y)
     //
     // These are the path primitives from which everything else can be constructed
     //
 
     // begins a new subpath at (x,y)

-    virtual void MoveToPoint( wxDouble x, wxDouble y ) = 0;
+    virtual void MoveToPoint( wxDouble x, wxDouble y );

     void MoveToPoint( const wxPoint2DDouble& p);
 
     // adds a straight line from the current point to (x,y) 
     void MoveToPoint( const wxPoint2DDouble& p);
 
     // adds a straight line from the current point to (x,y) 

-    virtual void AddLineToPoint( wxDouble x, wxDouble y ) = 0;
+    virtual void AddLineToPoint( wxDouble x, wxDouble y );

     void AddLineToPoint( const wxPoint2DDouble& p);
 
     // adds a cubic Bezier curve from the current point, using two control points and an end point
     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;
+    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
     void AddCurveToPoint( const wxPoint2DDouble& c1, const wxPoint2DDouble& c2, const wxPoint2DDouble& e);
     
     // adds another path

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

 
     // closes the current sub-path
 
     // closes the current sub-path

-    virtual void CloseSubpath() = 0;
+    virtual void CloseSubpath() ;

 
     // gets the last point of the current path, (0,0) if not yet set
 
     // 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;
+    wxPoint2DDouble GetCurrentPoint() const;

 
     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 
     // 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;
+    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);
 
     //
     void AddArc( const wxPoint2DDouble& c, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise);
 
     //


@@ -149,85 +241,32 @@ public :
     virtual void AddRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);
 
     // returns the native path
     virtual void AddRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);
 
     // returns the native path

-    virtual void * GetNativePath() const = 0;
+    virtual void * GetNativePath() const;

     
     // 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;

     
     // 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 wxGraphicsMatrix& matrix );

     
     // 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)
-};
-
-class WXDLLIMPEXP_CORE wxGraphicsMatrix : public wxGraphicsObject
-{
-public :
-    wxGraphicsMatrix(wxGraphicsRenderer* renderer) : wxGraphicsObject(renderer) {}
+    virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h)const;
+    wxRect2DDouble GetBox()const;

     
     

-    virtual ~wxGraphicsMatrix() {}
+    virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxODDEVEN_RULE)const;
+    bool Contains( const wxPoint2DDouble& c, int fillStyle = wxODDEVEN_RULE)const;

     
     

-    virtual wxGraphicsMatrix *Clone() const = 0;
+    const wxGraphicsPathData* GetPathData() const 
+    { return (const wxGraphicsPathData*) GetRefData(); }
+    wxGraphicsPathData* GetPathData() 
+    { return (wxGraphicsPathData*) GetRefData(); }

 
 

-    // 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 ); }
-
-    // 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;
-
-    // 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;
-    
-    //
-    // transformation
-    //
-    
-    // add the translation to this matrix
-    virtual void Translate( wxDouble dx , wxDouble dy ) = 0;
+private :
+    DECLARE_DYNAMIC_CLASS(wxGraphicsPath)
+} ;

 
 

-    // add the scale to this matrix
-    virtual void Scale( wxDouble xScale , wxDouble yScale ) = 0;
+extern WXDLLIMPEXP_DATA_CORE(wxGraphicsPath) wxNullGraphicsPath;

 
 

-    // 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 ) = 0;
-    
-    // applies the matrix except for translations
-    virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) =0;
-    
-    // returns the native representation
-    virtual void * GetNativeMatrix() const = 0;
-    
-    DECLARE_NO_COPY_CLASS(wxGraphicsMatrix)
-    DECLARE_ABSTRACT_CLASS(wxGraphicsMatrix)
-} ;

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


@@ -237,34 +276,60 @@ 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 );

     
     

-    virtual wxGraphicsPen* CreatePen(const wxPen& pen);
+    // ends the current page  (relevant only for printing / pdf etc) 
+    virtual void EndPage();

     
     

-    virtual wxGraphicsBrush* CreateBrush(const wxBrush& brush );
+    // make sure that the current content of this context is immediately visible
+    virtual void Flush();
+
+    wxGraphicsPath CreatePath() const;
+    
+    virtual wxGraphicsPen CreatePen(const wxPen& pen) const;
+    
+    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
     
     // 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);
+    virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, 
+        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
 
     // 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);
+    virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
+        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 bitmap representation
+    virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap ) const;
+    
+    // create a native bitmap representation
+    virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  ) 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;


@@ -272,10 +337,10 @@ 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


@@ -284,6 +349,25 @@ 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
     //


@@ -298,41 +382,41 @@ 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
     //
     
     // sets the pen
     //
     // setting the paint
     //
     
     // sets the pen

-    virtual void SetPen( wxGraphicsPen* pen , bool release = true );
+    virtual void SetPen( const wxGraphicsPen& pen );

     
     void SetPen( const wxPen& pen );
 
     // sets the brush for filling
     
     void SetPen( const wxPen& pen );
 
     // sets the brush for filling

-    virtual void SetBrush( wxGraphicsBrush* brush , bool release = true );
+    virtual void SetBrush( const wxGraphicsBrush& brush );

     
     void SetBrush( const wxBrush& brush );
 
     // sets the font
     
     void SetBrush( const wxBrush& brush );
 
     // sets the font

-    virtual void SetFont( wxGraphicsFont* font, bool release = true );
+    virtual void SetFont( const wxGraphicsFont& font );

     
     void SetFont( const wxFont& font, const wxColour& colour );
 
     
     // strokes along a path with the current pen
     
     void SetFont( const wxFont& font, const wxColour& colour );
 
     
     // 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


@@ -342,6 +426,10 @@ 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;
 


@@ -351,6 +439,8 @@ public:
     // image support
     //
 
     // image support
     //
 

+    virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
+

     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
 
     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
 
     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;


@@ -369,7 +459,7 @@ 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);


@@ -387,12 +477,10 @@ public:
 
 protected :
 
 
 protected :
 

-    wxGraphicsPen* m_pen;
-    bool m_releasePen;
-    wxGraphicsBrush* m_brush;
-    bool m_releaseBrush;
-    wxGraphicsFont* m_font;
-    bool m_releaseFont;
+    wxGraphicsPen m_pen;
+    wxGraphicsBrush m_brush;
+    wxGraphicsFont m_font;
+    int m_logicalFunction;

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


@@ -452,6 +540,7 @@ 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;
 


@@ -459,33 +548,41 @@ 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
     

-    virtual wxGraphicsPen* CreatePen(const wxPen& pen) = 0 ;
+    virtual wxGraphicsPen CreatePen(const wxPen& pen) = 0 ;

     
     

-    virtual wxGraphicsBrush* CreateBrush(const wxBrush& brush ) = 0 ;
+    virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) = 0 ;

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

         const wxColour&c1, const wxColour&c2) = 0;
 
     // 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
         const wxColour&c1, const wxColour&c2) = 0;
 
     // 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,
+    virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,

         const wxColour &oColor, const wxColour &cColor) = 0;
 
    // sets the font
         const wxColour &oColor, const wxColour &cColor) = 0;
 
    // sets the font

-    virtual wxGraphicsFont* CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) = 0;
+    virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) = 0;
+    
+    // create a native bitmap representation
+    virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap ) = 0;

     
     

+    // create a subimage from a native image representation
+    virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  ) = 0;

 private :
     DECLARE_NO_COPY_CLASS(wxGraphicsRenderer)
     DECLARE_ABSTRACT_CLASS(wxGraphicsRenderer)
 private :
     DECLARE_NO_COPY_CLASS(wxGraphicsRenderer)
     DECLARE_ABSTRACT_CLASS(wxGraphicsRenderer)