X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/068eb463a4a5ec031d559172897257f4743d570b..23318a5358be74727fb62854f623da84a4545bcd:/src/common/dcgraph.cpp

diff --git a/src/common/dcgraph.cpp b/src/common/dcgraph.cpp
index 6a8bfab989..2b9eb8c97a 100644
--- a/src/common/dcgraph.cpp
+++ b/src/common/dcgraph.cpp
@@ -19,6 +19,7 @@
 #if wxUSE_GRAPHICS_CONTEXT
 
 #include "wx/graphics.h"
+#include "wx/dcgraph.h"
 
 #ifndef WX_PRECOMP
     #include "wx/icon.h"
@@ -27,8 +28,14 @@
     #include "wx/region.h"
 #endif
 
-#ifndef wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
-    #define wxMAC_USE_CORE_GRAPHICS_BLEND_MODES 0
+#include "wx/dcclient.h"
+
+#ifdef __WXOSX_OR_COCOA__
+#ifdef __WXOSX_IPHONE__
+    #include <CoreGraphics/CoreGraphics.h>
+#else
+    #include <ApplicationServices/ApplicationServices.h>
+#endif
 #endif
 
 //-----------------------------------------------------------------------------
@@ -50,18 +57,57 @@ static inline double DegToRad(double deg)
 // wxDC bridge class
 //-----------------------------------------------------------------------------
 
-#ifdef __WXMAC__
-IMPLEMENT_DYNAMIC_CLASS(wxGCDC, wxDCBase)
-#else
 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
 
-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 )
+{
+    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;
@@ -77,13 +123,31 @@ void wxGCDC::SetGraphicsContext( wxGraphicsContext* ctx )
     }
 }
 
-wxGCDC::wxGCDC(const wxWindowDC& dc)
+wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxWindowDC& dc ) :
+   wxDCImpl( owner )
 {
     Init();
     SetGraphicsContext( wxGraphicsContext::Create(dc) );
+    m_window = dc.GetWindow();
 }
 
-void wxGCDC::Init()
+wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxMemoryDC& dc ) :
+   wxDCImpl( owner )
+{
+    Init();
+    SetGraphicsContext( wxGraphicsContext::Create(dc) );
+}
+
+#if wxUSE_PRINTING_ARCHITECTURE
+wxGCDCImpl::wxGCDCImpl( wxDC *owner, const wxPrinterDC& dc ) :
+   wxDCImpl( owner )
+{
+    Init();
+    SetGraphicsContext( wxGraphicsContext::Create(dc) );
+}
+#endif
+
+void wxGCDCImpl::Init()
 {
     m_ok = false;
     m_colour = true;
@@ -95,37 +159,49 @@ void wxGCDC::Init()
     m_brush = *wxWHITE_BRUSH;
 
     m_graphicContext = NULL;
+    m_logicalFunctionSupported = true;
 }
 
 
-wxGCDC::~wxGCDC()
+wxGCDCImpl::~wxGCDCImpl()
 {
     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 ) );
-        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->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));
     }
-    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();
@@ -133,9 +209,33 @@ void wxGCDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
     m_graphicContext->DrawIcon( icon , x, y, w, h );
 }
 
-void wxGCDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
+bool wxGCDCImpl::StartDoc( const wxString& WXUNUSED(message) )
+{
+    return true;
+}
+
+void wxGCDCImpl::EndDoc()
 {
-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoSetClippingRegion - invalid DC") );
+}
+
+void wxGCDCImpl::StartPage()
+{
+}
+
+void wxGCDCImpl::EndPage()
+{
+}
+
+void wxGCDCImpl::Flush()
+{
+#ifdef __WXOSX_OR_COCOA__
+    CGContextFlush( (CGContextRef) m_graphicContext->GetNativeContext() );
+#endif
+}
+
+void wxGCDCImpl::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
+{
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoSetClippingRegion - invalid DC") );
 
     m_graphicContext->Clip( x, y, w, h );
     if ( m_clipping )
@@ -156,20 +256,24 @@ void wxGCDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord w, wxCoord h )
     }
 }
 
-void wxGCDC::DoSetClippingRegionAsRegion( const wxRegion &region )
+void wxGCDCImpl::DoSetDeviceClippingRegion( const wxRegion &region )
 {
-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoSetClippingRegionAsRegion - invalid DC") );
+    // region is in device coordinates
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoSetDeviceClippingRegion - invalid DC") );
 
     if (region.Empty())
     {
-        DestroyClippingRegion();
+        //DestroyClippingRegion();
         return;
     }
 
+    wxRegion logRegion( region );
     wxCoord x, y, w, h;
-    region.GetBox( x, y, w, h );
 
-    m_graphicContext->Clip( region );
+    logRegion.Offset( DeviceToLogicalX(0), DeviceToLogicalY(0) );
+    logRegion.GetBox( x, y, w, h );
+
+    m_graphicContext->Clip( logRegion );
     if ( m_clipping )
     {
         m_clipX1 = wxMax( m_clipX1, x );
@@ -188,29 +292,35 @@ 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
+    // so we must explicitely make sure it only covers the area we want it to draw
+    int width, height ;
+    GetOwner()->GetSize( &width , &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;
 }
 
-void wxGCDC::DoGetSizeMM( int* width, int* height ) const
+void wxGCDCImpl::DoGetSizeMM( int* width, int* height ) const
 {
     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) );
 }
 
-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 )
     {
@@ -219,14 +329,14 @@ 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;
 }
 
-void wxGCDC::SetMapMode( int mode )
+void wxGCDCImpl::SetMapMode( int mode )
 {
     switch (mode)
     {
@@ -255,95 +365,58 @@ void wxGCDC::SetMapMode( int mode )
     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);
 }
 
-int wxGCDC::GetDepth() const
+int wxGCDCImpl::GetDepth() const
 {
     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();
-        m_matrixCurrent.Translate( m_deviceOriginX, m_deviceOriginY );
-        m_matrixCurrent.Scale( m_scaleX, m_scaleY );
+
         // 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 );
     }
 }
 
-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;
 }
 
-void wxGCDC::SetFont( const wxFont &font )
+void wxGCDCImpl::SetFont( const wxFont &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 );
     }
 }
 
-void wxGCDC::SetPen( const wxPen &pen )
+void wxGCDCImpl::SetPen( const wxPen &pen )
 {
     if ( m_pen == pen )
         return;
@@ -355,7 +428,7 @@ void wxGCDC::SetPen( const wxPen &pen )
     }
 }
 
-void wxGCDC::SetBrush( const wxBrush &brush )
+void wxGCDCImpl::SetBrush( const wxBrush &brush )
 {
     if (m_brush == brush)
         return;
@@ -367,56 +440,46 @@ void wxGCDC::SetBrush( const wxBrush &brush )
     }
 }
 
-void wxGCDC::SetBackground( const wxBrush &brush )
+void wxGCDCImpl::SetBackground( const wxBrush &brush )
 {
     if (m_backgroundBrush == brush)
         return;
 
     m_backgroundBrush = brush;
-    if (!m_backgroundBrush.Ok())
+    if (!m_backgroundBrush.IsOk())
         return;
 }
 
-void wxGCDC::SetLogicalFunction( int function )
+void wxGCDCImpl::SetLogicalFunction( int function )
 {
     if (m_logicalFunction == function)
         return;
 
     m_logicalFunction = function;
-#if wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
-
-    CGContextRef cgContext = ((wxCairoContext*)(m_graphicContext))->GetNativeContext();
-    if ( m_logicalFunction == wxCOPY )
-        CGContextSetBlendMode( cgContext, kCGBlendModeNormal );
-    else if ( m_logicalFunction == wxINVERT )
-        CGContextSetBlendMode( cgContext, kCGBlendModeExclusion );
+    if ( m_graphicContext->SetLogicalFunction( function ) )
+        m_logicalFunctionSupported=true;
     else
-        CGContextSetBlendMode( cgContext, kCGBlendModeNormal );
-#endif
-
+        m_logicalFunctionSupported=false;
 }
 
-bool wxGCDC::DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
+bool wxGCDCImpl::DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
                          const wxColour& WXUNUSED(col), int WXUNUSED(style))
 {
     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;
 }
 
-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") );
-
-#if !wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLine - invalid DC") );
 
-    if ( m_logicalFunction != wxCOPY )
+    if ( !m_logicalFunctionSupported )
         return;
-#endif
 
     m_graphicContext->StrokeLine(x1,y1,x2,y2);
 
@@ -424,16 +487,16 @@ void wxGCDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord 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_logicalFunction != wxCOPY )
+    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);
@@ -442,13 +505,13 @@ void wxGCDC::DoCrossHair( wxCoord x, wxCoord y )
     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 )
 {
-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawArc - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawArc - invalid DC") );
 
-    if ( m_logicalFunction != wxCOPY )
+    if ( !m_logicalFunctionSupported )
         return;
 
     double dx = x1 - xc;
@@ -480,55 +543,65 @@ void wxGCDC::DoDrawArc( wxCoord x1, wxCoord y1,
     wxGraphicsPath path = m_graphicContext->CreatePath();
     if ( fill && ((x1!=x2)||(y1!=y2)) )
         path.MoveToPoint( xc, yc );
-    path.AddArc( xc, yc , rad , DegToRad(sa) , DegToRad(ea), false );
+    // since these angles (ea,sa) are measured counter-clockwise, we invert them to
+    // get clockwise angles
+    path.AddArc( xc, yc , rad , DegToRad(-sa) , DegToRad(-ea), false );
     if ( fill && ((x1!=x2)||(y1!=y2)) )
         path.AddLineToPoint( xc, yc );
     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 )
 {
-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawEllipticArc - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawEllipticArc - invalid DC") );
 
-    if ( m_logicalFunction != wxCOPY )
+    if ( !m_logicalFunctionSupported )
         return;
 
-    bool fill = m_brush.GetStyle() != wxTRANSPARENT;
-
-    wxGraphicsPath path = m_graphicContext->CreatePath();
     m_graphicContext->PushState();
-    m_graphicContext->Translate(x+w/2,y+h/2);
+    m_graphicContext->Translate(x+w/2.0,y+h/2.0);
     wxDouble factor = ((wxDouble) w) / h;
     m_graphicContext->Scale( factor , 1.0);
-    if ( fill && (sa!=ea) )
-        path.MoveToPoint(0,0);
+
     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
     // get clockwise angles
-    path.AddArc( 0, 0, h/2 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
-    if ( fill && (sa!=ea) )
-        path.AddLineToPoint(0,0);
-    m_graphicContext->DrawPath( path );
+    if ( m_brush.GetStyle() != wxTRANSPARENT )
+    {
+        wxGraphicsPath path = m_graphicContext->CreatePath();
+        path.MoveToPoint( 0, 0 );
+        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->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 );
+    }
+
     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 );
 }
 
-void wxGCDC::DoDrawLines(int n, wxPoint points[],
+void wxGCDCImpl::DoDrawLines(int n, wxPoint points[],
                          wxCoord xoffset, wxCoord yoffset)
 {
-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawLines - invalid DC") );
-
-#if !wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawLines - invalid DC") );
 
-    if ( m_logicalFunction != wxCOPY )
+    if ( !m_logicalFunctionSupported )
         return;
-#endif
 
     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n];
     for( int i = 0; i < n; ++i)
@@ -542,27 +615,27 @@ void wxGCDC::DoDrawLines(int n, wxPoint points[],
 }
 
 #if wxUSE_SPLINES
-void wxGCDC::DoDrawSpline(wxList *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_logicalFunction != wxCOPY )
+    if ( !m_logicalFunctionSupported )
         return;
 
     wxGraphicsPath path = m_graphicContext->CreatePath();
 
-    wxList::compatibility_iterator node = points->GetFirst();
-    if (node == wxList::compatibility_iterator())
+    wxPointList::compatibility_iterator node = points->GetFirst();
+    if (node == wxPointList::compatibility_iterator())
         // empty list
         return;
 
-    wxPoint *p = (wxPoint *)node->GetData();
+    wxPoint *p = node->GetData();
 
     wxCoord x1 = p->x;
     wxCoord y1 = p->y;
 
     node = node->GetNext();
-    p = (wxPoint *)node->GetData();
+    p = node->GetData();
 
     wxCoord x2 = p->x;
     wxCoord y2 = p->y;
@@ -580,7 +653,7 @@ void wxGCDC::DoDrawSpline(wxList *points)
 #endif // !wxUSE_STL
 
     {
-        p = (wxPoint *)node->GetData();
+        p = node->GetData();
         x1 = x2;
         y1 = y2;
         x2 = p->x;
@@ -600,15 +673,15 @@ void wxGCDC::DoDrawSpline(wxList *points)
 }
 #endif // wxUSE_SPLINES
 
-void wxGCDC::DoDrawPolygon( int n, wxPoint points[],
+void wxGCDCImpl::DoDrawPolygon( int n, wxPoint points[],
                             wxCoord xoffset, wxCoord yoffset,
                             int 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 ( m_logicalFunction != wxCOPY )
+    if ( !m_logicalFunctionSupported )
         return;
 
     bool closeIt = false;
@@ -628,7 +701,7 @@ void wxGCDC::DoDrawPolygon( int n, wxPoint points[],
     delete[] pointsD;
 }
 
-void wxGCDC::DoDrawPolyPolygon(int n,
+void wxGCDCImpl::DoDrawPolyPolygon(int n,
                                int count[],
                                wxPoint points[],
                                wxCoord xoffset,
@@ -657,11 +730,11 @@ void wxGCDC::DoDrawPolyPolygon(int n,
     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_logicalFunction != wxCOPY )
+    if ( !m_logicalFunctionSupported )
         return;
 
     // CMB: draw nothing if transformed w or h is 0
@@ -678,13 +751,13 @@ void wxGCDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord w, wxCoord 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)
 {
-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRoundedRectangle - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRoundedRectangle - invalid DC") );
 
-    if ( m_logicalFunction != wxCOPY )
+    if ( !m_logicalFunctionSupported )
         return;
 
     if (radius < 0.0)
@@ -694,35 +767,60 @@ void wxGCDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y,
     if (w == 0 || h == 0)
         return;
 
+    if ( m_graphicContext->ShouldOffset() )
+    {
+        // if we are offsetting the entire rectangle is moved 0.5, so the
+        // border line gets off by 1
+        w -= 1;
+        h -= 1;
+    }
     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_logicalFunction != wxCOPY )
+    if ( !m_logicalFunctionSupported )
         return;
 
+    if ( m_graphicContext->ShouldOffset() )
+    {
+        // if we are offsetting the entire rectangle is moved 0.5, so the
+        // border line gets off by 1
+        w -= 1;
+        h -= 1;
+    }
     m_graphicContext->DrawEllipse(x,y,w,h);
 }
 
-bool wxGCDC::CanDrawBitmap() const
+bool wxGCDCImpl::CanDrawBitmap() const
 {
     return true;
 }
 
-bool wxGCDC::DoBlit(
+bool wxGCDCImpl::DoBlit(
     wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
-    wxDC *source, wxCoord xsrc, wxCoord ysrc, int logical_func , bool WXUNUSED(useMask),
+    wxDC *source, wxCoord xsrc, wxCoord ysrc, int logical_func , bool useMask,
+    wxCoord xsrcMask, wxCoord ysrcMask )
+{
+    return DoStretchBlit( xdest, ydest, width, height,
+        source, xsrc, ysrc, width, height, logical_func, useMask,
+        xsrcMask,ysrcMask );
+}
+
+bool wxGCDCImpl::DoStretchBlit(
+    wxCoord xdest, wxCoord ydest, wxCoord dstWidth, wxCoord dstHeight,
+    wxDC *source, wxCoord xsrc, wxCoord ysrc, wxCoord srcWidth, wxCoord srcHeight,
+    int logical_func , bool useMask,
     wxCoord xsrcMask, wxCoord ysrcMask )
 {
-    wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::DoBlit - invalid DC") );
-    wxCHECK_MSG( source->Ok(), false, wxT("wxGCDC(cg)::DoBlit - 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;
-    else if ( logical_func != wxCOPY )
+    else if ( !m_graphicContext->SetLogicalFunction( logical_func ) )
     {
         wxFAIL_MSG( wxT("Blitting is only supported with wxCOPY logical operation.") );
         return false;
@@ -734,14 +832,30 @@ bool wxGCDC::DoBlit(
         ysrcMask = ysrc;
     }
 
-    wxRect subrect(source-> LogicalToDeviceX(xsrc),source-> LogicalToDeviceY(ysrc),
-        source-> LogicalToDeviceXRel(width),source-> LogicalToDeviceYRel(height));
+    wxRect subrect(source->LogicalToDeviceX(xsrc),
+                   source->LogicalToDeviceY(ysrc),
+                   source->LogicalToDeviceXRel(srcWidth),
+                   source->LogicalToDeviceYRel(srcHeight));
+
+    // 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;
 
     wxBitmap blit = source->GetAsBitmap( &subrect );
 
-    if ( blit.Ok() )
+    if ( blit.IsOk() )
     {
-        m_graphicContext->DrawBitmap( blit, xdest , ydest , width , height );
+        if ( !useMask && blit.GetMask() )
+            blit.SetMask(NULL);
+
+        m_graphicContext->DrawBitmap( blit, xdest, ydest,
+                                      dstWidth, dstHeight);
     }
     else
     {
@@ -749,17 +863,20 @@ bool wxGCDC::DoBlit(
         return false;
     }
 
+    // reset logical function
+    m_graphicContext->SetLogicalFunction( m_logicalFunction );
+
     return true;
 }
 
-void wxGCDC::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
+void wxGCDCImpl::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
                                double angle)
 {
-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
 
     if ( str.length() == 0 )
         return;
-    if ( m_logicalFunction != wxCOPY )
+    if ( !m_logicalFunctionSupported )
         return;
 
     if ( m_backgroundMode == wxTRANSPARENT )
@@ -768,13 +885,14 @@ 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) ) );
 }
 
-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") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoDrawText - invalid DC") );
 
     if ( str.length() == 0 )
         return;
-    if ( m_logicalFunction != wxCOPY )
+
+    if ( !m_logicalFunctionSupported )
         return;
 
     if ( m_backgroundMode == wxTRANSPARENT )
@@ -783,18 +901,18 @@ void wxGCDC::DoDrawText(const wxString& str, wxCoord x, wxCoord y)
         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;
 }
 
-void wxGCDC::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
+void wxGCDCImpl::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
                               wxCoord *descent, wxCoord *externalLeading ,
-                              wxFont *theFont ) const
+                              const wxFont *theFont ) const
 {
-    wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );
+    wxCHECK_RET( IsOk(), wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );
 
     if ( theFont )
     {
@@ -806,13 +924,13 @@ void wxGCDC::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *heig
     m_graphicContext->GetTextExtent( str, &w, &h, &d, &e );
 
     if ( height )
-        *height = (wxCoord)h;
+        *height = (wxCoord)(h+0.5);
     if ( descent )
-        *descent = (wxCoord)d;
+        *descent = (wxCoord)(d+0.5);
     if ( externalLeading )
-        *externalLeading = (wxCoord)e;
+        *externalLeading = (wxCoord)(e+0.5);
     if ( width )
-        *width = (wxCoord)w;
+        *width = (wxCoord)(w+0.5);
 
     if ( theFont )
     {
@@ -820,9 +938,9 @@ 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( IsOk(), false, wxT("wxGCDC(cg)::DoGetPartialTextExtents - invalid DC") );
     widths.Clear();
     widths.Add(0,text.Length());
     if ( text.IsEmpty() )
@@ -837,7 +955,7 @@ bool wxGCDC::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) c
     return true;
 }
 
-wxCoord wxGCDC::GetCharWidth(void) const
+wxCoord wxGCDCImpl::GetCharWidth(void) const
 {
     wxCoord width;
     DoGetTextExtent( wxT("g") , &width , NULL , NULL , NULL , NULL );
@@ -845,7 +963,7 @@ wxCoord wxGCDC::GetCharWidth(void) const
     return width;
 }
 
-wxCoord wxGCDC::GetCharHeight(void) const
+wxCoord wxGCDCImpl::GetCharHeight(void) const
 {
     wxCoord height;
     DoGetTextExtent( wxT("g") , NULL , &height , NULL , NULL , NULL );
@@ -853,9 +971,9 @@ wxCoord wxGCDC::GetCharHeight(void) const
     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;
@@ -865,13 +983,18 @@ void wxGCDC::Clear(void)
     m_graphicContext->SetBrush( m_brush );
 }
 
-void wxGCDC::DoGetSize(int *width, int *height) const
+void wxGCDCImpl::DoGetSize(int *width, int *height) const
 {
-    *width = 1000;
-    *height = 1000;
+    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 )
@@ -914,7 +1037,7 @@ void wxGCDC::DoGradientFillLinear(const wxRect& rect,
     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)
@@ -942,10 +1065,10 @@ void wxGCDC::DoGradientFillConcentric(const wxRect& rect,
     m_graphicContext->SetPen(m_pen);
 }
 
-void wxGCDC::DoDrawCheckMark(wxCoord x, wxCoord y,
+void wxGCDCImpl::DoDrawCheckMark(wxCoord x, wxCoord y,
                              wxCoord width, wxCoord height)
 {
-    wxDCBase::DoDrawCheckMark(x,y,width,height);
+    wxDCImpl::DoDrawCheckMark(x,y,width,height);
 }
 
 #endif // wxUSE_GRAPHICS_CONTEXT