Replaced Ok() occurrences with IsOk() throughout trunk.

[wxWidgets.git] / src / common / dcgraph.cpp

diff --git a/src/common/dcgraph.cpp b/src/common/dcgraph.cpp
index 54ecf302cbe44925d89ae0e992646e09af19fdc6..f91a78fd6fc400048af6dea1bf4c86312c44cfd0 100644 (file)
--- a/src/common/dcgraph.cpp
+++ b/src/common/dcgraph.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
 /////////////////////////////////////////////////////////////////////////////

-// Name:        src/common/graphcmn.cpp
+// Name:        src/common/dcgraph.cpp

 // Purpose:     graphics context methods common to all platforms
 // Author:      Stefan Csomor
 // Modified by:
 // Purpose:     graphics context methods common to all platforms
 // Author:      Stefan Csomor
 // Modified by:


@@ -19,6 +19,7 @@
 #if wxUSE_GRAPHICS_CONTEXT
 
 #include "wx/graphics.h"
 #if wxUSE_GRAPHICS_CONTEXT
 
 #include "wx/graphics.h"

+#include "wx/dcgraph.h"

 
 #ifndef WX_PRECOMP
     #include "wx/icon.h"
 
 #ifndef WX_PRECOMP
     #include "wx/icon.h"


@@ -27,9 +28,16 @@
     #include "wx/region.h"
 #endif
 
     #include "wx/region.h"
 #endif
 

-#ifdef __WXMAC__
-#include "wx/mac/private.h"
+#include "wx/dcclient.h"
+
+#ifdef __WXOSX_OR_COCOA__
+#ifdef __WXOSX_IPHONE__
+    #include <CoreGraphics/CoreGraphics.h>
+#else
+    #include <ApplicationServices/ApplicationServices.h>

 #endif
 #endif

+#endif
+

 //-----------------------------------------------------------------------------
 // constants
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------
 // constants
 //-----------------------------------------------------------------------------


@@ -45,22 +53,100 @@ static inline double DegToRad(double deg)
     return (deg * M_PI) / 180.0;
 }
 
     return (deg * M_PI) / 180.0;
 }
 

+static bool TranslateRasterOp(wxRasterOperationMode function, wxCompositionMode *op)
+{
+    switch ( function )
+    {
+        case wxCOPY: // src
+            // since we are supporting alpha, _OVER is closer to the intention than _SOURCE
+            // since the latter would overwrite even when alpha is not set to opaque
+            *op = wxCOMPOSITION_OVER; 
+            break;
+        case wxOR:         // src OR dst
+            *op = wxCOMPOSITION_ADD;
+            break;
+        case wxNO_OP:      // dst
+            *op = wxCOMPOSITION_DEST; // ignore the source
+            break;
+        case wxCLEAR:      // 0
+            *op = wxCOMPOSITION_CLEAR;// clear dst
+            break;
+        case wxXOR:        // src XOR dst
+            *op = wxCOMPOSITION_XOR;
+            break;
+
+        case wxAND:        // src AND dst
+        case wxAND_INVERT: // (NOT src) AND dst
+        case wxAND_REVERSE:// src AND (NOT dst)
+        case wxEQUIV:      // (NOT src) XOR dst
+        case wxINVERT:     // NOT dst
+        case wxNAND:       // (NOT src) OR (NOT dst)
+        case wxNOR:        // (NOT src) AND (NOT dst)
+        case wxOR_INVERT:  // (NOT src) OR dst
+        case wxOR_REVERSE: // src OR (NOT dst)
+        case wxSET:        // 1
+        case wxSRC_INVERT: // NOT src
+        default:
+            return false;
+    }
+    return true;
+}
+

 //-----------------------------------------------------------------------------
 // wxDC bridge class
 //-----------------------------------------------------------------------------
 
 //-----------------------------------------------------------------------------
 // wxDC bridge class
 //-----------------------------------------------------------------------------
 

-#ifdef __WXMAC__
-IMPLEMENT_DYNAMIC_CLASS(wxGCDC, wxDCBase)
-#else

 IMPLEMENT_DYNAMIC_CLASS(wxGCDC, wxDC)
 IMPLEMENT_DYNAMIC_CLASS(wxGCDC, wxDC)

+
+wxGCDC::wxGCDC(const wxWindowDC& dc) :
+  wxDC( new wxGCDCImpl( this, dc ) )
+{
+}
+
+wxGCDC::wxGCDC( const wxMemoryDC& dc) :
+  wxDC( new wxGCDCImpl( this, dc ) )
+{
+}
+
+#if wxUSE_PRINTING_ARCHITECTURE
+wxGCDC::wxGCDC( const wxPrinterDC& dc) :
+  wxDC( new wxGCDCImpl( this, dc ) )
+{
+}

 #endif
 
 #endif
 

-wxGCDC::wxGCDC()
+wxGCDC::wxGCDC() :
+  wxDC( new wxGCDCImpl( this ) )

 {
 {

-    Init();
+}
+
+wxGCDC::~wxGCDC()
+{
+}
+
+wxGraphicsContext* wxGCDC::GetGraphicsContext()
+{
+    if (!m_pimpl) return NULL;
+    wxGCDCImpl *gc_impl = (wxGCDCImpl*) m_pimpl;
+    return gc_impl->GetGraphicsContext();

 }
 
 void wxGCDC::SetGraphicsContext( wxGraphicsContext* ctx )
 }
 
 void wxGCDC::SetGraphicsContext( wxGraphicsContext* ctx )

+{
+    if (!m_pimpl) return;
+    wxGCDCImpl *gc_impl = (wxGCDCImpl*) m_pimpl;
+    gc_impl->SetGraphicsContext( ctx );
+}
+
+IMPLEMENT_ABSTRACT_CLASS(wxGCDCImpl, wxDCImpl)
+
+wxGCDCImpl::wxGCDCImpl( wxDC *owner ) :
+   wxDCImpl( owner )
+{
+    Init();
+}
+
+void wxGCDCImpl::SetGraphicsContext( wxGraphicsContext* ctx )

 {
     delete m_graphicContext;
     m_graphicContext = ctx;
 {
     delete m_graphicContext;
     m_graphicContext = ctx;


@@ -76,21 +162,39 @@ void wxGCDC::SetGraphicsContext( wxGraphicsContext* ctx )
     }
 }
 
     }
 }
 

-wxGCDC::wxGCDC(const wxWindowDC& dc)
+wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxWindowDC& dc ) :
+   wxDCImpl( owner )

 {
     Init();
     SetGraphicsContext( wxGraphicsContext::Create(dc) );
 {
     Init();
     SetGraphicsContext( wxGraphicsContext::Create(dc) );

+    m_window = dc.GetWindow();
+}
+
+wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxMemoryDC& dc ) :
+   wxDCImpl( owner )
+{
+    Init();
+    wxGraphicsContext* context;
+#if wxUSE_CAIRO
+    wxGraphicsRenderer* renderer = wxGraphicsRenderer::GetCairoRenderer();
+    context = renderer->CreateContext(dc);
+#else
+    context = wxGraphicsContext::Create(dc);
+#endif
+
+    SetGraphicsContext( context );

 }
 
 }
 

-#ifdef __WXMSW__
-wxGCDC::wxGCDC(const wxMemoryDC& dc)
+#if wxUSE_PRINTING_ARCHITECTURE
+wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxPrinterDC& dc ) :
+   wxDCImpl( owner )

 {
     Init();
     SetGraphicsContext( wxGraphicsContext::Create(dc) );
 }
 {
     Init();
     SetGraphicsContext( wxGraphicsContext::Create(dc) );
 }

-#endif    
+#endif

 
 

-void wxGCDC::Init()
+void wxGCDCImpl::Init()

 {
     m_ok = false;
     m_colour = true;
 {
     m_ok = false;
     m_colour = true;


@@ -101,39 +205,50 @@ void wxGCDC::Init()
     m_font = *wxNORMAL_FONT;
     m_brush = *wxWHITE_BRUSH;
 
     m_font = *wxNORMAL_FONT;
     m_brush = *wxWHITE_BRUSH;
 

-    m_graphicContext = NULL;
+    m_graphicContext = wxGraphicsContext::Create();

     m_logicalFunctionSupported = true;
 }
 
 
     m_logicalFunctionSupported = true;
 }
 
 

-wxGCDC::~wxGCDC()
+wxGCDCImpl::~wxGCDCImpl()

 {
     delete m_graphicContext;
 }
 
 {
     delete m_graphicContext;
 }
 

-void wxGCDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool WXUNUSED(useMask) )
+void wxGCDCImpl::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y,
+                               bool useMask )

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid DC") );
-    wxCHECK_RET( bmp.Ok(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid bitmap") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid DC") );
+    wxCHECK_RET( bmp.IsOk(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid bitmap") );

 
 

+    int w = bmp.GetWidth();
+    int h = bmp.GetHeight();

     if ( bmp.GetDepth() == 1 )
     {
         m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
         m_graphicContext->SetBrush( wxBrush( m_textBackgroundColour , wxSOLID ) );
     if ( bmp.GetDepth() == 1 )
     {
         m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
         m_graphicContext->SetBrush( wxBrush( m_textBackgroundColour , wxSOLID ) );

-        m_graphicContext->DrawRectangle( x , y , bmp.GetWidth() , bmp.GetHeight() );        
+        m_graphicContext->DrawRectangle( x, y, w, h );

         m_graphicContext->SetBrush( wxBrush( m_textForegroundColour , wxSOLID ) );
         m_graphicContext->SetBrush( wxBrush( m_textForegroundColour , wxSOLID ) );

-        m_graphicContext->DrawBitmap( bmp, x , y , bmp.GetWidth() , bmp.GetHeight() );
+        m_graphicContext->DrawBitmap( bmp, x, y, w, h );

         m_graphicContext->SetBrush( m_graphicContext->CreateBrush(m_brush));
         m_graphicContext->SetPen( m_graphicContext->CreatePen(m_pen));
     }
         m_graphicContext->SetBrush( m_graphicContext->CreateBrush(m_brush));
         m_graphicContext->SetPen( m_graphicContext->CreatePen(m_pen));
     }

-    else
-        m_graphicContext->DrawBitmap( bmp, x , y , bmp.GetWidth() , bmp.GetHeight() );
+    else // not a monochrome bitmap, handle it normally
+    {
+        // make a copy in case we need to remove its mask, if we don't modify
+        // it the copy is cheap as bitmaps are reference-counted
+        wxBitmap bmpCopy(bmp);
+        if ( !useMask && bmp.GetMask() )
+            bmpCopy.SetMask(NULL);
+
+        m_graphicContext->DrawBitmap( bmpCopy, x, y, w, h );
+    }

 }
 
 }
 

-void wxGCDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
+void wxGCDCImpl::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawIcon - invalid DC") );
-    wxCHECK_RET( icon.Ok(), wxT("wxGCDC(cg)::DoDrawIcon - invalid icon") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawIcon - invalid DC") );
+    wxCHECK_RET( icon.IsOk(), wxT("wxGCDC(cg)::DoDrawIcon - invalid icon") );

 
     wxCoord w = icon.GetWidth();
     wxCoord h = icon.GetHeight();
 
     wxCoord w = icon.GetWidth();
     wxCoord h = icon.GetHeight();


@@ -141,33 +256,31 @@ void wxGCDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
     m_graphicContext->DrawIcon( icon , x, y, w, h );
 }
 
     m_graphicContext->DrawIcon( icon , x, y, w, h );
 }
 

-bool wxGCDC::StartDoc( const wxString& WXUNUSED(message) ) 
+bool wxGCDCImpl::StartDoc( const wxString& WXUNUSED(message) )

 {
 {

-    return false;
+    return true;

 }
 
 }
 

-void wxGCDC::EndDoc() 
+void wxGCDCImpl::EndDoc()

 {
 }
 
 {
 }
 

-void wxGCDC::StartPage()
+void wxGCDCImpl::StartPage()

 {
 }
 
 {
 }
 

-void wxGCDC::EndPage() 
+void wxGCDCImpl::EndPage()

 {
 }
 {
 }

-    
-void wxGCDC::Flush()
+
+void wxGCDCImpl::Flush()

 {
 {

-#ifdef __WXMAC__
-    CGContextFlush( (CGContextRef) m_graphicContext->GetNativeContext() );
-#endif
+    m_graphicContext->Flush();

 }
 
 }
 

-void wxGCDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
+void wxGCDCImpl::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoSetClippingRegion - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoSetClippingRegion - invalid DC") );

 
     m_graphicContext->Clip( x, y, w, h );
     if ( m_clipping )
 
     m_graphicContext->Clip( x, y, w, h );
     if ( m_clipping )


@@ -188,10 +301,10 @@ void wxGCDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
     }
 }
 
     }
 }
 

-void wxGCDC::DoSetClippingRegionAsRegion( const wxRegion &region )
+void wxGCDCImpl::DoSetDeviceClippingRegion( const wxRegion &region )

 {
     // region is in device coordinates
 {
     // region is in device coordinates

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoSetClippingRegionAsRegion - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoSetDeviceClippingRegion - invalid DC") );

 
     if (region.Empty())
     {
 
     if (region.Empty())
     {


@@ -224,35 +337,35 @@ void wxGCDC::DoSetClippingRegionAsRegion( const wxRegion &region )
     }
 }
 
     }
 }
 

-void wxGCDC::DestroyClippingRegion()
+void wxGCDCImpl::DestroyClippingRegion()

 {
     m_graphicContext->ResetClip();
     // currently the clip eg of a window extends to the area between the scrollbars
 {
     m_graphicContext->ResetClip();
     // currently the clip eg of a window extends to the area between the scrollbars

-    // so we must explicitely make sure it only covers the area we want it to draw
+    // so we must explicitly make sure it only covers the area we want it to draw

     int width, height ;
     int width, height ;

-    GetSize( &width , &height ) ;
+    GetOwner()->GetSize( &width , &height ) ;

     m_graphicContext->Clip( DeviceToLogicalX(0) , DeviceToLogicalY(0) , DeviceToLogicalXRel(width), DeviceToLogicalYRel(height) );
     m_graphicContext->Clip( DeviceToLogicalX(0) , DeviceToLogicalY(0) , DeviceToLogicalXRel(width), DeviceToLogicalYRel(height) );

-    
+

     m_graphicContext->SetPen( m_pen );
     m_graphicContext->SetBrush( m_brush );
 
     m_clipping = false;
 }
 
     m_graphicContext->SetPen( m_pen );
     m_graphicContext->SetBrush( m_brush );
 
     m_clipping = false;
 }
 

-void wxGCDC::DoGetSizeMM( int* width, int* height ) const
+void wxGCDCImpl::DoGetSizeMM( int* width, int* height ) const

 {
     int w = 0, h = 0;
 
 {
     int w = 0, h = 0;
 

-    GetSize( &w, &h );
+    GetOwner()->GetSize( &w, &h );

     if (width)
         *width = long( double(w) / (m_scaleX * m_mm_to_pix_x) );
     if (height)
         *height = long( double(h) / (m_scaleY * m_mm_to_pix_y) );
 }
 
     if (width)
         *width = long( double(w) / (m_scaleX * m_mm_to_pix_x) );
     if (height)
         *height = long( double(h) / (m_scaleY * m_mm_to_pix_y) );
 }
 

-void wxGCDC::SetTextForeground( const wxColour &col )
+void wxGCDCImpl::SetTextForeground( const wxColour &col )

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::SetTextForeground - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::SetTextForeground - invalid DC") );

 
     if ( col != m_textForegroundColour )
     {
 
     if ( col != m_textForegroundColour )
     {


@@ -261,14 +374,14 @@ void wxGCDC::SetTextForeground( const wxColour &col )
     }
 }
 
     }
 }
 

-void wxGCDC::SetTextBackground( const wxColour &col )
+void wxGCDCImpl::SetTextBackground( const wxColour &col )

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::SetTextBackground - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::SetTextBackground - invalid DC") );

 
     m_textBackgroundColour = col;
 }
 
 
     m_textBackgroundColour = col;
 }
 

-void wxGCDC::SetMapMode( int mode )
+void wxGCDCImpl::SetMapMode( wxMappingMode mode )

 {
     switch (mode)
     {
 {
     switch (mode)
     {


@@ -297,95 +410,58 @@ void wxGCDC::SetMapMode( int mode )
     ComputeScaleAndOrigin();
 }
 
     ComputeScaleAndOrigin();
 }
 

-void wxGCDC::SetUserScale( double x, double y )
-{
-    // allow negative ? -> no
-
-    m_userScaleX = x;
-    m_userScaleY = y;
-    ComputeScaleAndOrigin();
-}
-
-void wxGCDC::SetLogicalScale( double x, double y )
-{
-    // allow negative ?
-    m_logicalScaleX = x;
-    m_logicalScaleY = y;
-    ComputeScaleAndOrigin();
-}
-
-void wxGCDC::SetLogicalOrigin( wxCoord x, wxCoord y )
-{
-    m_logicalOriginX = x * m_signX;   // is this still correct ?
-    m_logicalOriginY = y * m_signY;
-    ComputeScaleAndOrigin();
-}
-
-void wxGCDC::SetDeviceOrigin( wxCoord x, wxCoord y )
-{
-    m_deviceOriginX = x;
-    m_deviceOriginY = y;
-    ComputeScaleAndOrigin();
-}
-
-void wxGCDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
-{
-    m_signX = (xLeftRight ?  1 : -1);
-    m_signY = (yBottomUp ? -1 :  1);
-    ComputeScaleAndOrigin();
-}
-
-wxSize wxGCDC::GetPPI() const
+wxSize wxGCDCImpl::GetPPI() const

 {
     return wxSize(72, 72);
 }
 
 {
     return wxSize(72, 72);
 }
 

-int wxGCDC::GetDepth() const
+int wxGCDCImpl::GetDepth() const

 {
     return 32;
 }
 
 {
     return 32;
 }
 

-void wxGCDC::ComputeScaleAndOrigin()
+void wxGCDCImpl::ComputeScaleAndOrigin()

 {
 {

-    m_scaleX = m_logicalScaleX * m_userScaleX;
-    m_scaleY = m_logicalScaleY * m_userScaleY;
+    wxDCImpl::ComputeScaleAndOrigin();

 
     if ( m_graphicContext )
     {
         m_matrixCurrent = m_graphicContext->CreateMatrix();
 
     if ( m_graphicContext )
     {
         m_matrixCurrent = m_graphicContext->CreateMatrix();

-        m_matrixCurrent.Translate( m_deviceOriginX, m_deviceOriginY );
-        m_matrixCurrent.Scale( m_scaleX, m_scaleY );
+

         // the logical origin sets the origin to have new coordinates
         // the logical origin sets the origin to have new coordinates

-        m_matrixCurrent.Translate( -m_logicalOriginX, -m_logicalOriginY );
+        m_matrixCurrent.Translate( m_deviceOriginX - m_logicalOriginX * m_signX * m_scaleX,
+                                   m_deviceOriginY-m_logicalOriginY * m_signY * m_scaleY);
+
+        m_matrixCurrent.Scale( m_scaleX * m_signX, m_scaleY * m_signY );

 
         m_graphicContext->SetTransform( m_matrixOriginal );
         m_graphicContext->ConcatTransform( m_matrixCurrent );
     }
 }
 
 
         m_graphicContext->SetTransform( m_matrixOriginal );
         m_graphicContext->ConcatTransform( m_matrixCurrent );
     }
 }
 

-void wxGCDC::SetPalette( const wxPalette& WXUNUSED(palette) )
+void wxGCDCImpl::SetPalette( const wxPalette& WXUNUSED(palette) )

 {
 
 }
 
 {
 
 }
 

-void wxGCDC::SetBackgroundMode( int mode )
+void wxGCDCImpl::SetBackgroundMode( int mode )

 {
     m_backgroundMode = mode;
 }
 
 {
     m_backgroundMode = mode;
 }
 

-void wxGCDC::SetFont( const wxFont &font )
+void wxGCDCImpl::SetFont( const wxFont &font )

 {
     m_font = font;
     if ( m_graphicContext )
     {
         wxFont f = font;
 {
     m_font = font;
     if ( m_graphicContext )
     {
         wxFont f = font;

-        if ( f.Ok() )
+        if ( f.IsOk() )

             f.SetPointSize( /*LogicalToDeviceYRel*/(font.GetPointSize()));
         m_graphicContext->SetFont( f, m_textForegroundColour );
     }
 }
 
             f.SetPointSize( /*LogicalToDeviceYRel*/(font.GetPointSize()));
         m_graphicContext->SetFont( f, m_textForegroundColour );
     }
 }
 

-void wxGCDC::SetPen( const wxPen &pen )
+void wxGCDCImpl::SetPen( const wxPen &pen )

 {
     if ( m_pen == pen )
         return;
 {
     if ( m_pen == pen )
         return;


@@ -397,7 +473,7 @@ void wxGCDC::SetPen( const wxPen &pen )
     }
 }
 
     }
 }
 

-void wxGCDC::SetBrush( const wxBrush &brush )
+void wxGCDCImpl::SetBrush( const wxBrush &brush )

 {
     if (m_brush == brush)
         return;
 {
     if (m_brush == brush)
         return;


@@ -408,44 +484,51 @@ void wxGCDC::SetBrush( const wxBrush &brush )
         m_graphicContext->SetBrush( m_brush );
     }
 }
         m_graphicContext->SetBrush( m_brush );
     }
 }

- 
-void wxGCDC::SetBackground( const wxBrush &brush )
+
+void wxGCDCImpl::SetBackground( const wxBrush &brush )

 {
     if (m_backgroundBrush == brush)
         return;
 
     m_backgroundBrush = brush;
 {
     if (m_backgroundBrush == brush)
         return;
 
     m_backgroundBrush = brush;

-    if (!m_backgroundBrush.Ok())
+    if (!m_backgroundBrush.IsOk())

         return;
 }
 
         return;
 }
 

-void wxGCDC::SetLogicalFunction( int function )
+void wxGCDCImpl::SetLogicalFunction( wxRasterOperationMode function )

 {
     if (m_logicalFunction == function)
         return;
 
     m_logicalFunction = function;
 {
     if (m_logicalFunction == function)
         return;
 
     m_logicalFunction = function;

-    if ( m_graphicContext->SetLogicalFunction( function ) )
-        m_logicalFunctionSupported=true;
+
+    wxCompositionMode mode;
+    m_logicalFunctionSupported = TranslateRasterOp( function, &mode);
+    if (m_logicalFunctionSupported)
+        m_logicalFunctionSupported = m_graphicContext->SetCompositionMode(mode);
+
+    if ( function == wxXOR )
+        m_graphicContext->SetAntialiasMode(wxANTIALIAS_NONE);

     else
     else

-        m_logicalFunctionSupported=false;
+        m_graphicContext->SetAntialiasMode(wxANTIALIAS_DEFAULT);

 }
 
 }
 

-bool wxGCDC::DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
-                         const wxColour& WXUNUSED(col), int WXUNUSED(style))
+bool wxGCDCImpl::DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
+                             const wxColour& WXUNUSED(col),
+                             wxFloodFillStyle WXUNUSED(style))

 {
     return false;
 }
 
 {
     return false;
 }
 

-bool wxGCDC::DoGetPixel( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxColour *WXUNUSED(col) ) const
+bool wxGCDCImpl::DoGetPixel( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxColour *WXUNUSED(col) ) const

 {
     //  wxCHECK_MSG( 0 , false, wxT("wxGCDC(cg)::DoGetPixel - not implemented") );
     return false;
 }
 
 {
     //  wxCHECK_MSG( 0 , false, wxT("wxGCDC(cg)::DoGetPixel - not implemented") );
     return false;
 }
 

-void wxGCDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
+void wxGCDCImpl::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawLine - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLine - invalid DC") );

 
     if ( !m_logicalFunctionSupported )
         return;
 
     if ( !m_logicalFunctionSupported )
         return;


@@ -456,16 +539,16 @@ void wxGCDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
     CalcBoundingBox(x2, y2);
 }
 
     CalcBoundingBox(x2, y2);
 }
 

-void wxGCDC::DoCrossHair( wxCoord x, wxCoord y )
+void wxGCDCImpl::DoCrossHair( wxCoord x, wxCoord y )

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoCrossHair - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoCrossHair - invalid DC") );

 
     if ( !m_logicalFunctionSupported )
         return;
 
     int w = 0, h = 0;
 
 
     if ( !m_logicalFunctionSupported )
         return;
 
     int w = 0, h = 0;
 

-    GetSize( &w, &h );
+    GetOwner()->GetSize( &w, &h );

 
     m_graphicContext->StrokeLine(0,y,w,y);
     m_graphicContext->StrokeLine(x,0,x,h);
 
     m_graphicContext->StrokeLine(0,y,w,y);
     m_graphicContext->StrokeLine(x,0,x,h);


@@ -474,11 +557,11 @@ void wxGCDC::DoCrossHair( wxCoord x, wxCoord y )
     CalcBoundingBox(0+w, 0+h);
 }
 
     CalcBoundingBox(0+w, 0+h);
 }
 

-void wxGCDC::DoDrawArc( wxCoord x1, wxCoord y1,
+void wxGCDCImpl::DoDrawArc( wxCoord x1, wxCoord y1,

                         wxCoord x2, wxCoord y2,
                         wxCoord xc, wxCoord yc )
 {
                         wxCoord x2, wxCoord y2,
                         wxCoord xc, wxCoord yc )
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawArc - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawArc - invalid DC") );

 
     if ( !m_logicalFunctionSupported )
         return;
 
     if ( !m_logicalFunctionSupported )
         return;


@@ -520,10 +603,10 @@ void wxGCDC::DoDrawArc( wxCoord x1, wxCoord y1,
     m_graphicContext->DrawPath(path);
 }
 
     m_graphicContext->DrawPath(path);
 }
 

-void wxGCDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
+void wxGCDCImpl::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,

                                 double sa, double ea )
 {
                                 double sa, double ea )
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawEllipticArc - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawEllipticArc - invalid DC") );

 
     if ( !m_logicalFunctionSupported )
         return;
 
     if ( !m_logicalFunctionSupported )
         return;


@@ -539,37 +622,35 @@ void wxGCDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
     {
         wxGraphicsPath path = m_graphicContext->CreatePath();
         path.MoveToPoint( 0, 0 );
     {
         wxGraphicsPath path = m_graphicContext->CreatePath();
         path.MoveToPoint( 0, 0 );

-        path.AddLineToPoint( h / 2.0 * cos(DegToRad(sa)) , h / 2.0 * sin(DegToRad(-sa)) );
-        path.AddLineToPoint( h / 2.0 * cos(DegToRad(ea)) , h / 2.0 * sin(DegToRad(-ea)) );
+        path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );

         path.AddLineToPoint( 0, 0 );
         m_graphicContext->FillPath( path );
 
         path = m_graphicContext->CreatePath();
         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
         path.AddLineToPoint( 0, 0 );
         m_graphicContext->FillPath( path );
 
         path = m_graphicContext->CreatePath();
         path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );

-        m_graphicContext->FillPath( path );

         m_graphicContext->StrokePath( path );
     }
     else
     {
         wxGraphicsPath path = m_graphicContext->CreatePath();
         m_graphicContext->StrokePath( path );
     }
     else
     {
         wxGraphicsPath path = m_graphicContext->CreatePath();

-    path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
-    m_graphicContext->DrawPath( path );
+        path.AddArc( 0, 0, h/2.0 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
+        m_graphicContext->DrawPath( path );

     }
 
     m_graphicContext->PopState();
 }
 
     }
 
     m_graphicContext->PopState();
 }
 

-void wxGCDC::DoDrawPoint( wxCoord x, wxCoord y )
+void wxGCDCImpl::DoDrawPoint( wxCoord x, wxCoord y )

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawPoint - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawPoint - invalid DC") );

 
     DoDrawLine( x , y , x + 1 , y + 1 );
 }
 
 
     DoDrawLine( x , y , x + 1 , y + 1 );
 }
 

-void wxGCDC::DoDrawLines(int n, wxPoint points[],
+void wxGCDCImpl::DoDrawLines(int n, wxPoint points[],

                          wxCoord xoffset, wxCoord yoffset)
 {
                          wxCoord xoffset, wxCoord yoffset)
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawLines - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLines - invalid DC") );

 
     if ( !m_logicalFunctionSupported )
         return;
 
     if ( !m_logicalFunctionSupported )
         return;


@@ -586,9 +667,9 @@ void wxGCDC::DoDrawLines(int n, wxPoint points[],
 }
 
 #if wxUSE_SPLINES
 }
 
 #if wxUSE_SPLINES

-void wxGCDC::DoDrawSpline(const wxPointList *points)
+void wxGCDCImpl::DoDrawSpline(const wxPointList *points)

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawSpline - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawSpline - invalid DC") );

 
     if ( !m_logicalFunctionSupported )
         return;
 
     if ( !m_logicalFunctionSupported )
         return;


@@ -596,7 +677,7 @@ void wxGCDC::DoDrawSpline(const wxPointList *points)
     wxGraphicsPath path = m_graphicContext->CreatePath();
 
     wxPointList::compatibility_iterator node = points->GetFirst();
     wxGraphicsPath path = m_graphicContext->CreatePath();
 
     wxPointList::compatibility_iterator node = points->GetFirst();

-    if (node == wxPointList::compatibility_iterator())
+    if ( !node )

         // empty list
         return;
 
         // empty list
         return;
 


@@ -615,13 +696,13 @@ void wxGCDC::DoDrawSpline(const wxPointList *points)
 
     path.MoveToPoint( x1 , y1 );
     path.AddLineToPoint( cx1 , cy1 );
 
     path.MoveToPoint( x1 , y1 );
     path.AddLineToPoint( cx1 , cy1 );

-#if !wxUSE_STL
+#if !wxUSE_STD_CONTAINERS

 
     while ((node = node->GetNext()) != NULL)
 #else
 
     while ((node = node->GetNext()))
 
     while ((node = node->GetNext()) != NULL)
 #else
 
     while ((node = node->GetNext()))

-#endif // !wxUSE_STL
+#endif // !wxUSE_STD_CONTAINERS

 
     {
         p = node->GetData();
 
     {
         p = node->GetData();


@@ -644,11 +725,11 @@ void wxGCDC::DoDrawSpline(const wxPointList *points)
 }
 #endif // wxUSE_SPLINES
 
 }
 #endif // wxUSE_SPLINES
 

-void wxGCDC::DoDrawPolygon( int n, wxPoint points[],
-                            wxCoord xoffset, wxCoord yoffset,
-                            int fillStyle )
+void wxGCDCImpl::DoDrawPolygon( int n, wxPoint points[],
+                                wxCoord xoffset, wxCoord yoffset,
+                                wxPolygonFillMode fillStyle )

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawPolygon - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawPolygon - invalid DC") );

 
     if ( n <= 0 || (m_brush.GetStyle() == wxTRANSPARENT && m_pen.GetStyle() == wxTRANSPARENT ) )
         return;
 
     if ( n <= 0 || (m_brush.GetStyle() == wxTRANSPARENT && m_pen.GetStyle() == wxTRANSPARENT ) )
         return;


@@ -672,12 +753,12 @@ void wxGCDC::DoDrawPolygon( int n, wxPoint points[],
     delete[] pointsD;
 }
 
     delete[] pointsD;
 }
 

-void wxGCDC::DoDrawPolyPolygon(int n,
+void wxGCDCImpl::DoDrawPolyPolygon(int n,

                                int count[],
                                wxPoint points[],
                                wxCoord xoffset,
                                wxCoord yoffset,
                                int count[],
                                wxPoint points[],
                                wxCoord xoffset,
                                wxCoord yoffset,

-                               int fillStyle)
+                               wxPolygonFillMode fillStyle)

 {
     wxASSERT(n > 1);
     wxGraphicsPath path = m_graphicContext->CreatePath();
 {
     wxASSERT(n > 1);
     wxGraphicsPath path = m_graphicContext->CreatePath();


@@ -701,9 +782,9 @@ void wxGCDC::DoDrawPolyPolygon(int n,
     m_graphicContext->DrawPath( path , fillStyle);
 }
 
     m_graphicContext->DrawPath( path , fillStyle);
 }
 

-void wxGCDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
+void wxGCDCImpl::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord w, wxCoord h)

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRectangle - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRectangle - invalid DC") );

 
     if ( !m_logicalFunctionSupported )
         return;
 
     if ( !m_logicalFunctionSupported )
         return;


@@ -722,11 +803,11 @@ void wxGCDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
     m_graphicContext->DrawRectangle(x,y,w,h);
 }
 
     m_graphicContext->DrawRectangle(x,y,w,h);
 }
 

-void wxGCDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y,
+void wxGCDCImpl::DoDrawRoundedRectangle(wxCoord x, wxCoord y,

                                     wxCoord w, wxCoord h,
                                     double radius)
 {
                                     wxCoord w, wxCoord h,
                                     double radius)
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRoundedRectangle - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRoundedRectangle - invalid DC") );

 
     if ( !m_logicalFunctionSupported )
         return;
 
     if ( !m_logicalFunctionSupported )
         return;


@@ -748,9 +829,9 @@ void wxGCDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y,
     m_graphicContext->DrawRoundedRectangle( x,y,w,h,radius);
 }
 
     m_graphicContext->DrawRoundedRectangle( x,y,w,h,radius);
 }
 

-void wxGCDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
+void wxGCDCImpl::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord w, wxCoord h)

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawEllipse - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawEllipse - invalid DC") );

 
     if ( !m_logicalFunctionSupported )
         return;
 
     if ( !m_logicalFunctionSupported )
         return;


@@ -765,14 +846,15 @@ void wxGCDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
     m_graphicContext->DrawEllipse(x,y,w,h);
 }
 
     m_graphicContext->DrawEllipse(x,y,w,h);
 }
 

-bool wxGCDC::CanDrawBitmap() const
+bool wxGCDCImpl::CanDrawBitmap() const

 {
     return true;
 }
 
 {
     return true;
 }
 

-bool wxGCDC::DoBlit(
+bool wxGCDCImpl::DoBlit(

     wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
     wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,

-    wxDC *source, wxCoord xsrc, wxCoord ysrc, int logical_func , bool useMask,
+    wxDC *source, wxCoord xsrc, wxCoord ysrc,
+    wxRasterOperationMode logical_func , bool useMask,

     wxCoord xsrcMask, wxCoord ysrcMask )
 {
     return DoStretchBlit( xdest, ydest, width, height,
     wxCoord xsrcMask, wxCoord ysrcMask )
 {
     return DoStretchBlit( xdest, ydest, width, height,


@@ -780,70 +862,90 @@ bool wxGCDC::DoBlit(
         xsrcMask,ysrcMask );
 }
 
         xsrcMask,ysrcMask );
 }
 

-bool wxGCDC::DoStretchBlit(
+bool wxGCDCImpl::DoStretchBlit(

     wxCoord xdest, wxCoord ydest, wxCoord dstWidth, wxCoord dstHeight,
     wxDC *source, wxCoord xsrc, wxCoord ysrc, wxCoord srcWidth, wxCoord srcHeight,
     wxCoord xdest, wxCoord ydest, wxCoord dstWidth, wxCoord dstHeight,
     wxDC *source, wxCoord xsrc, wxCoord ysrc, wxCoord srcWidth, wxCoord srcHeight,

-    int logical_func , bool WXUNUSED(useMask),
+    wxRasterOperationMode logical_func , bool useMask,

     wxCoord xsrcMask, wxCoord ysrcMask )
 {
     wxCoord xsrcMask, wxCoord ysrcMask )
 {

-    wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid DC") );
-    wxCHECK_MSG( source->Ok(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid source DC") );
+    wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid DC") );
+    wxCHECK_MSG( source->IsOk(), false, wxT("wxGCDC(cg)::DoStretchBlit - invalid source DC") );

 
     if ( logical_func == wxNO_OP )
         return true;
 
     if ( logical_func == wxNO_OP )
         return true;

-    else if ( !m_graphicContext->SetLogicalFunction( logical_func ) )
-    
+
+    wxCompositionMode mode;
+    if ( !TranslateRasterOp(logical_func, &mode) )

     {
     {

-        wxFAIL_MSG( wxT("Blitting is only supported with wxCOPY logical operation.") );
+        wxFAIL_MSG( wxT("Blitting is not supported with this logical operation.") );

         return false;
     }
 
         return false;
     }
 

-    if (xsrcMask == -1 && ysrcMask == -1)
+    bool retval = true;
+
+    wxCompositionMode formerMode = m_graphicContext->GetCompositionMode();
+    if (m_graphicContext->SetCompositionMode(mode))

     {
     {

-        xsrcMask = xsrc;
-        ysrcMask = ysrc;
-    }
+        wxAntialiasMode formerAa = m_graphicContext->GetAntialiasMode();
+        if (mode == wxCOMPOSITION_XOR)
+        {
+            m_graphicContext->SetAntialiasMode(wxANTIALIAS_NONE);
+        }

 
 

-    wxRect subrect(source->LogicalToDeviceX(xsrc),
-                   source->LogicalToDeviceY(ysrc),
-                   source->LogicalToDeviceXRel(srcWidth),
-                   source->LogicalToDeviceYRel(srcHeight));
+        if (xsrcMask == -1 && ysrcMask == -1)
+        {
+            xsrcMask = xsrc;
+            ysrcMask = ysrc;
+        }

 
 

-    // if needed clip the subrect down to the size of the source DC
-    wxCoord sw, sh;
-    source->GetSize(&sw, &sh);
-    sw = source->LogicalToDeviceXRel(sw);
-    sh = source->LogicalToDeviceYRel(sh);
-    if (subrect.x + subrect.width > sw)
-        subrect.width = sw - subrect.x;
-    if (subrect.y + subrect.height > sh)
-        subrect.height = sh - subrect.y;
+        wxRect subrect(source->LogicalToDeviceX(xsrc),
+                       source->LogicalToDeviceY(ysrc),
+                       source->LogicalToDeviceXRel(srcWidth),
+                       source->LogicalToDeviceYRel(srcHeight));

 
 

-    wxBitmap blit = source->GetAsBitmap( &subrect );
+        // if needed clip the subrect down to the size of the source DC
+        wxCoord sw, sh;
+        source->GetSize(&sw, &sh);
+        sw = source->LogicalToDeviceXRel(sw);
+        sh = source->LogicalToDeviceYRel(sh);
+        if (subrect.x + subrect.width > sw)
+            subrect.width = sw - subrect.x;
+        if (subrect.y + subrect.height > sh)
+            subrect.height = sh - subrect.y;

 
 

-    if ( blit.Ok() )
-    {
-        m_graphicContext->DrawBitmap( blit, xdest, ydest,
-                                      dstWidth, dstHeight);
-    }
-    else
-    {
-        wxFAIL_MSG( wxT("Cannot Blit. Unable to get contents of DC as bitmap.") );
-        return false;
-    }
+        wxBitmap blit = source->GetAsBitmap( &subrect );

 
 

-    // reset logical function
-    m_graphicContext->SetLogicalFunction( m_logicalFunction );
+        if ( blit.IsOk() )
+        {
+            if ( !useMask && blit.GetMask() )
+                blit.SetMask(NULL);

 
 

-    return true;
+            m_graphicContext->DrawBitmap( blit, xdest, ydest,
+                                          dstWidth, dstHeight);
+        }
+        else
+        {
+            wxFAIL_MSG( wxT("Cannot Blit. Unable to get contents of DC as bitmap.") );
+            retval = false;
+        }
+
+        if (mode == wxCOMPOSITION_XOR)
+        {
+            m_graphicContext->SetAntialiasMode(formerAa);
+        }
+    }
+    // reset composition
+    m_graphicContext->SetCompositionMode(formerMode);
+
+    return retval;

 }
 
 }
 

-void wxGCDC::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
+void wxGCDCImpl::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,

                                double angle)
 {
                                double angle)
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );

 
 

-    if ( str.length() == 0 )
+    if ( str.empty() )

         return;
     if ( !m_logicalFunctionSupported )
         return;
         return;
     if ( !m_logicalFunctionSupported )
         return;


@@ -854,11 +956,23 @@ void wxGCDC::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
         m_graphicContext->DrawText( str, x ,y , DegToRad(angle ), m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 }
 
         m_graphicContext->DrawText( str, x ,y , DegToRad(angle ), m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 }
 

-void wxGCDC::DoDrawText(const wxString& str, wxCoord x, wxCoord y)
+void wxGCDCImpl::DoDrawText(const wxString& str, wxCoord x, wxCoord y)

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
+    // For compatibility with other ports (notably wxGTK) and because it's
+    // genuinely useful, we allow passing multiline strings to DrawText().
+    // However there is no native OSX function to draw them directly so we
+    // instead reuse the generic DrawLabel() method to render them. Of course,
+    // DrawLabel() itself will call back to us but with single line strings
+    // only so there won't be any infinite recursion here.
+    if ( str.find('\n') != wxString::npos )
+    {
+        GetOwner()->DrawLabel(str, wxRect(x, y, 0, 0));
+        return;
+    }

 
 

-    if ( str.length() == 0 )
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawText - invalid DC") );
+
+    if ( str.empty() )

         return;
 
     if ( !m_logicalFunctionSupported )
         return;
 
     if ( !m_logicalFunctionSupported )


@@ -870,18 +984,18 @@ void wxGCDC::DoDrawText(const wxString& str, wxCoord x, wxCoord y)
         m_graphicContext->DrawText( str, x ,y , m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 }
 
         m_graphicContext->DrawText( str, x ,y , m_graphicContext->CreateBrush( wxBrush(m_textBackgroundColour,wxSOLID) ) );
 }
 

-bool wxGCDC::CanGetTextExtent() const
+bool wxGCDCImpl::CanGetTextExtent() const

 {
 {

-    wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::CanGetTextExtent - invalid DC") );
+    wxCHECK_MSG( IsOk(), false, wxT("wxGCDC(cg)::CanGetTextExtent - invalid DC") );

 
     return true;
 }
 
 
     return true;
 }
 

-void wxGCDC::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
+void wxGCDCImpl::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,

                               wxCoord *descent, wxCoord *externalLeading ,
                               const wxFont *theFont ) const
 {
                               wxCoord *descent, wxCoord *externalLeading ,
                               const wxFont *theFont ) const
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );
+    wxCHECK_RET( m_graphicContext, wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );

 
     if ( theFont )
     {
 
     if ( theFont )
     {


@@ -907,9 +1021,9 @@ void wxGCDC::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *heig
     }
 }
 
     }
 }
 

-bool wxGCDC::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
+bool wxGCDCImpl::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const

 {
 {

-    wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::DoGetPartialTextExtents - invalid DC") );
+    wxCHECK_MSG( m_graphicContext, false, wxT("wxGCDC(cg)::DoGetPartialTextExtents - invalid DC") );

     widths.Clear();
     widths.Add(0,text.Length());
     if ( text.IsEmpty() )
     widths.Clear();
     widths.Add(0,text.Length());
     if ( text.IsEmpty() )


@@ -924,7 +1038,7 @@ bool wxGCDC::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) c
     return true;
 }
 
     return true;
 }
 

-wxCoord wxGCDC::GetCharWidth(void) const
+wxCoord wxGCDCImpl::GetCharWidth(void) const

 {
     wxCoord width;
     DoGetTextExtent( wxT("g") , &width , NULL , NULL , NULL , NULL );
 {
     wxCoord width;
     DoGetTextExtent( wxT("g") , &width , NULL , NULL , NULL , NULL );


@@ -932,7 +1046,7 @@ wxCoord wxGCDC::GetCharWidth(void) const
     return width;
 }
 
     return width;
 }
 

-wxCoord wxGCDC::GetCharHeight(void) const
+wxCoord wxGCDCImpl::GetCharHeight(void) const

 {
     wxCoord height;
     DoGetTextExtent( wxT("g") , NULL , &height , NULL , NULL , NULL );
 {
     wxCoord height;
     DoGetTextExtent( wxT("g") , NULL , &height , NULL , NULL , NULL );


@@ -940,25 +1054,33 @@ wxCoord wxGCDC::GetCharHeight(void) const
     return height;
 }
 
     return height;
 }
 

-void wxGCDC::Clear(void)
+void wxGCDCImpl::Clear(void)

 {
 {

-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::Clear - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::Clear - invalid DC") );

     // TODO better implementation / incorporate size info into wxGCDC or context
     m_graphicContext->SetBrush( m_backgroundBrush );
     wxPen p = *wxTRANSPARENT_PEN;
     m_graphicContext->SetPen( p );
     // TODO better implementation / incorporate size info into wxGCDC or context
     m_graphicContext->SetBrush( m_backgroundBrush );
     wxPen p = *wxTRANSPARENT_PEN;
     m_graphicContext->SetPen( p );

+    wxCompositionMode formerMode = m_graphicContext->GetCompositionMode();
+    m_graphicContext->SetCompositionMode(wxCOMPOSITION_SOURCE);

     DoDrawRectangle( 0, 0, 32000 , 32000 );
     DoDrawRectangle( 0, 0, 32000 , 32000 );

+    m_graphicContext->SetCompositionMode(formerMode);

     m_graphicContext->SetPen( m_pen );
     m_graphicContext->SetBrush( m_brush );
 }
 
     m_graphicContext->SetPen( m_pen );
     m_graphicContext->SetBrush( m_brush );
 }
 

-void wxGCDC::DoGetSize(int *width, int *height) const
+void wxGCDCImpl::DoGetSize(int *width, int *height) const

 {
 {

-    *width = 10000;
-    *height = 10000;
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoGetSize - invalid DC") );
+    wxDouble w,h;
+    m_graphicContext->GetSize( &w, &h );
+    if ( height )
+        *height = (int) (h+0.5);
+    if ( width )
+        *width = (int) (w+0.5);

 }
 
 }
 

-void wxGCDC::DoGradientFillLinear(const wxRect& rect,
+void wxGCDCImpl::DoGradientFillLinear(const wxRect& rect,

                                   const wxColour& initialColour,
                                   const wxColour& destColour,
                                   wxDirection nDirection )
                                   const wxColour& initialColour,
                                   const wxColour& destColour,
                                   wxDirection nDirection )


@@ -1001,7 +1123,7 @@ void wxGCDC::DoGradientFillLinear(const wxRect& rect,
     m_graphicContext->SetPen(m_pen);
 }
 
     m_graphicContext->SetPen(m_pen);
 }
 

-void wxGCDC::DoGradientFillConcentric(const wxRect& rect,
+void wxGCDCImpl::DoGradientFillConcentric(const wxRect& rect,

                                       const wxColour& initialColour,
                                       const wxColour& destColour,
                                       const wxPoint& circleCenter)
                                       const wxColour& initialColour,
                                       const wxColour& destColour,
                                       const wxPoint& circleCenter)


@@ -1029,10 +1151,10 @@ void wxGCDC::DoGradientFillConcentric(const wxRect& rect,
     m_graphicContext->SetPen(m_pen);
 }
 
     m_graphicContext->SetPen(m_pen);
 }
 

-void wxGCDC::DoDrawCheckMark(wxCoord x, wxCoord y,
+void wxGCDCImpl::DoDrawCheckMark(wxCoord x, wxCoord y,

                              wxCoord width, wxCoord height)
 {
                              wxCoord width, wxCoord height)
 {

-    wxDCBase::DoDrawCheckMark(x,y,width,height);
+    wxDCImpl::DoDrawCheckMark(x,y,width,height);

 }
 
 #endif // wxUSE_GRAPHICS_CONTEXT
 }
 
 #endif // wxUSE_GRAPHICS_CONTEXT