revert r59246; the window parameter was there by purpose (i.e. for consistency with...

[wxWidgets.git] / src / osx / carbon / graphics.cpp

diff --git a/src/osx/carbon/graphics.cpp b/src/osx/carbon/graphics.cpp
index 2ae8e6388d27d30418bef18ef0c545dd9298da62..98ce41f0d8d54a139acb225bb1298f63a9bda85f 100644 (file)
--- a/src/osx/carbon/graphics.cpp
+++ b/src/osx/carbon/graphics.cpp
@@ -5,7 +5,7 @@
 // Modified by:
 // Created:     01/02/97
 // RCS-ID:      $Id$
 // Modified by:
 // Created:     01/02/97
 // RCS-ID:      $Id$

-// Copyright:   (c) Stefan Csomor
+// copyright:   (c) Stefan Csomor

 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 // Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 


@@ -39,12 +39,7 @@
     #include "wx/osx/dcprint.h"
     #include "wx/osx/dcclient.h"
     #include "wx/osx/dcmemory.h"
     #include "wx/osx/dcprint.h"
     #include "wx/osx/dcclient.h"
     #include "wx/osx/dcmemory.h"

-#if wxOSX_USE_CARBON
-#include "wx/osx/uma.h"
-#else
-#include "wx/osx/private.h"
-#endif
-
+    #include "wx/osx/private.h"

 #else
     #include "CoreServices/CoreServices.h"
     #include "ApplicationServices/ApplicationServices.h"
 #else
     #include "CoreServices/CoreServices.h"
     #include "ApplicationServices/ApplicationServices.h"


@@ -76,6 +71,42 @@ int UMAGetSystemVersion()
 
 #endif
 
 
 #endif
 

+#if wxOSX_USE_COCOA_OR_IPHONE
+extern CGContextRef wxOSXGetContextFromCurrentNSContext() ;
+extern bool wxOSXLockFocus( WXWidget view) ;
+extern void wxOSXUnlockFocus( WXWidget view) ;
+#endif
+
+#if 1 // MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5
+
+// TODO test whether this private API also works under 10.3
+
+// copying values from NSCompositingModes (see also webkit and cairo sources)
+
+typedef enum CGCompositeOperation {
+   kCGCompositeOperationClear           = 0,
+   kCGCompositeOperationCopy            = 1,
+   kCGCompositeOperationSourceOver      = 2,
+   kCGCompositeOperationSourceIn        = 3,
+   kCGCompositeOperationSourceOut       = 4,
+   kCGCompositeOperationSourceAtop      = 5,
+   kCGCompositeOperationDestinationOver = 6,
+   kCGCompositeOperationDestinationIn   = 7,
+   kCGCompositeOperationDestinationOut  = 8,
+   kCGCompositeOperationDestinationAtop = 9,
+   kCGCompositeOperationXOR             = 10,
+   kCGCompositeOperationPlusDarker      = 11,
+// NS only, unsupported by CG : Highlight 
+   kCGCompositeOperationPlusLighter     = 12
+} CGCompositeOperation ;
+
+extern "C"
+{
+   CG_EXTERN void CGContextSetCompositeOperation (CGContextRef context, int operation);
+} ;
+
+#endif
+

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


@@ -103,8 +134,13 @@ OSStatus wxMacDrawCGImage(
 #if wxOSX_USE_CARBON
     return HIViewDrawCGImage( inContext, inBounds, inImage );
 #else
 #if wxOSX_USE_CARBON
     return HIViewDrawCGImage( inContext, inBounds, inImage );
 #else

-    // todo flip
-    CGContextDrawImage(inContext, *inBounds, inImage );
+    CGContextSaveGState(inContext);
+    CGContextTranslateCTM(inContext, inBounds->origin.x, inBounds->origin.y + inBounds->size.height);
+    CGRect r = *inBounds;
+    r.origin.x = r.origin.y = 0;
+    CGContextScaleCTM(inContext, 1, -1);
+    CGContextDrawImage(inContext, r, inImage );
+    CGContextRestoreGState(inContext);

     return noErr;
 #endif
 }
     return noErr;
 #endif
 }


@@ -527,12 +563,7 @@ void wxMacCoreGraphicsPenData::Apply( wxGraphicsContext* context )
     }
     else
     {
     }
     else
     {

-        if ( context->GetLogicalFunction() == wxINVERT || context->GetLogicalFunction() == wxXOR )
-        {
-            CGContextSetRGBStrokeColor( cg , (CGFloat) 1.0,(CGFloat)  1.0 , (CGFloat) 1.0, (CGFloat) 1.0 );
-        }
-        else
-            CGContextSetStrokeColorWithColor( cg , m_color );
+        CGContextSetStrokeColorWithColor( cg , m_color );

     }
 }
 
     }
 }
 


@@ -685,7 +716,7 @@ void wxMacCoreGraphicsBrushData::CreateRadialGradientBrush( wxDouble xo, wxDoubl
     const wxColour &oColor, const wxColour &cColor )
 {
     m_gradientFunction = CreateGradientFunction( oColor, cColor );
     const wxColour &oColor, const wxColour &cColor )
 {
     m_gradientFunction = CreateGradientFunction( oColor, cColor );

-    m_shading = CGShadingCreateRadial( wxMacGetGenericRGBColorSpace(), CGPointMake((CGFloat) xo,(CGFloat) yo), 0, 
+    m_shading = CGShadingCreateRadial( wxMacGetGenericRGBColorSpace(), CGPointMake((CGFloat) xo,(CGFloat) yo), 0,

                                         CGPointMake((CGFloat) xc,(CGFloat) yc), (CGFloat) radius, m_gradientFunction, true, true ) ;
     m_isShading = true ;
 }
                                         CGPointMake((CGFloat) xc,(CGFloat) yc), (CGFloat) radius, m_gradientFunction, true, true ) ;
     m_isShading = true ;
 }


@@ -1140,7 +1171,7 @@ public :
     // gets the bounding box enclosing all points (possibly including control points)
     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *y) const;
 
     // gets the bounding box enclosing all points (possibly including control points)
     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *y) const;
 

-    virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxODDEVEN_RULE) const;
+    virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxODDEVEN_RULE) const;

 private :
     CGMutablePathRef m_path;
 };
 private :
     CGMutablePathRef m_path;
 };


@@ -1251,7 +1282,7 @@ void wxMacCoreGraphicsPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wx
     *h = bounds.size.height;
 }
 
     *h = bounds.size.height;
 }
 

-bool wxMacCoreGraphicsPathData::Contains( wxDouble x, wxDouble y, int fillStyle) const
+bool wxMacCoreGraphicsPathData::Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle) const

 {
     return CGPathContainsPoint( m_path, NULL, CGPointMake((CGFloat) x,(CGFloat) y), fillStyle == wxODDEVEN_RULE );
 }
 {
     return CGPathContainsPoint( m_path, NULL, CGPointMake((CGFloat) x,(CGFloat) y), fillStyle == wxODDEVEN_RULE );
 }


@@ -1309,7 +1340,14 @@ public:
 
     virtual void * GetNativeContext();
 
 
     virtual void * GetNativeContext();
 

-    bool SetLogicalFunction( int function );
+    virtual bool SetAntialiasMode(wxAntialiasMode antialias);
+
+    virtual bool SetCompositionMode(wxCompositionMode op);
+
+    virtual void BeginLayer(wxDouble opacity);
+
+    virtual void EndLayer();
+    

     //
     // transformation
     //
     //
     // transformation
     //


@@ -1339,10 +1377,10 @@ public:
     virtual void StrokePath( const wxGraphicsPath &path );
 
     // fills a path with the current brush
     virtual void StrokePath( const wxGraphicsPath &path );
 
     // fills a path with the current brush

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

 
     // 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 = wxODDEVEN_RULE );
+    virtual void DrawPath( const wxGraphicsPath &path, wxPolygonFillMode fillStyle = wxODDEVEN_RULE );

 
     virtual bool ShouldOffset() const
     {
 
     virtual bool ShouldOffset() const
     {


@@ -1359,10 +1397,6 @@ public:
     // text
     //
 
     // text
     //
 

-    virtual void DrawText( const wxString &str, wxDouble x, wxDouble y );
-
-    virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle );
-

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


@@ -1383,18 +1417,24 @@ public:
     DECLARE_DYNAMIC_CLASS_NO_COPY(wxMacCoreGraphicsContext)
 
 private:
     DECLARE_DYNAMIC_CLASS_NO_COPY(wxMacCoreGraphicsContext)
 
 private:

-    void EnsureIsValid();
+    bool EnsureIsValid();
+
+    virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
+    virtual void DoDrawRotatedText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle );

 
     CGContextRef m_cgContext;
 #if wxOSX_USE_CARBON
     WindowRef m_windowRef;
 
     CGContextRef m_cgContext;
 #if wxOSX_USE_CARBON
     WindowRef m_windowRef;

+#else
+    WXWidget m_view;

 #endif
 #endif

-    bool m_releaseContext;
+    bool m_contextSynthesized;

     CGAffineTransform m_windowTransform;
     wxDouble m_width;
     wxDouble m_height;
     CGAffineTransform m_windowTransform;
     wxDouble m_width;
     wxDouble m_height;

+    bool m_invisible;

 
 

-#if wxOSX_USE_CARBON
+#if wxOSX_USE_COCOA_OR_CARBON

     wxCFRef<HIShapeRef> m_clipRgn;
 #endif
 };
     wxCFRef<HIShapeRef> m_clipRgn;
 #endif
 };


@@ -1440,12 +1480,16 @@ public :
 void wxMacCoreGraphicsContext::Init()
 {
     m_cgContext = NULL;
 void wxMacCoreGraphicsContext::Init()
 {
     m_cgContext = NULL;

-    m_releaseContext = false;
+    m_contextSynthesized = false;
+    m_width = 0;
+    m_height = 0;

 #if wxOSX_USE_CARBON
     m_windowRef = NULL;
 #endif
 #if wxOSX_USE_CARBON
     m_windowRef = NULL;
 #endif

-    m_width = 0;
-    m_height = 0;
+#if wxOSX_USE_COCOA_OR_IPHONE
+    m_view = NULL;
+#endif
+    m_invisible = false;

 }
 
 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, CGContextRef cgcontext, wxDouble width, wxDouble height ) : wxGraphicsContext(renderer)
 }
 
 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, CGContextRef cgcontext, wxDouble width, wxDouble height ) : wxGraphicsContext(renderer)


@@ -1468,19 +1512,33 @@ wxMacCoreGraphicsContext::wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer
 {
     Init();
 
 {
     Init();
 

+    wxSize sz = window->GetSize();
+    m_width = sz.x;
+    m_height = sz.y;
+
+#if wxOSX_USE_COCOA_OR_IPHONE
+    m_view = window->GetHandle();
+
+    if ( !((wxWidgetCocoaImpl*) window->GetPeer())->IsFlipped() )
+    {
+        m_windowTransform = CGAffineTransformMakeTranslation( 0 , m_height );
+        m_windowTransform = CGAffineTransformScale( m_windowTransform , 1 , -1 );
+    }
+    else
+    {
+        m_windowTransform = CGAffineTransformIdentity;
+    }
+#else

     int originX , originY;
     originX = originY = 0;
     int originX , originY;
     originX = originY = 0;

-

     Rect bounds = { 0,0,0,0 };
     Rect bounds = { 0,0,0,0 };

-#if defined(__WXCOCOA__) || !wxOSX_USE_CARBON
-#else

     m_windowRef = (WindowRef) window->MacGetTopLevelWindowRef();
     window->MacWindowToRootWindow( &originX , &originY );
     GetWindowBounds( m_windowRef, kWindowContentRgn, &bounds );
     m_windowRef = (WindowRef) window->MacGetTopLevelWindowRef();
     window->MacWindowToRootWindow( &originX , &originY );
     GetWindowBounds( m_windowRef, kWindowContentRgn, &bounds );

-#endif

     m_windowTransform = CGAffineTransformMakeTranslation( 0 , bounds.bottom - bounds.top );
     m_windowTransform = CGAffineTransformScale( m_windowTransform , 1 , -1 );
     m_windowTransform = CGAffineTransformTranslate( m_windowTransform, originX, originY ) ;
     m_windowTransform = CGAffineTransformMakeTranslation( 0 , bounds.bottom - bounds.top );
     m_windowTransform = CGAffineTransformScale( m_windowTransform , 1 , -1 );
     m_windowTransform = CGAffineTransformTranslate( m_windowTransform, originX, originY ) ;

+#endif

 }
 
 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext(wxGraphicsRenderer* renderer) : wxGraphicsContext(renderer)
 }
 
 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext(wxGraphicsRenderer* renderer) : wxGraphicsContext(renderer)


@@ -1529,112 +1587,238 @@ void wxMacCoreGraphicsContext::Flush()
     CGContextFlush(m_cgContext);
 }
 
     CGContextFlush(m_cgContext);
 }
 

-void wxMacCoreGraphicsContext::EnsureIsValid()
+bool wxMacCoreGraphicsContext::EnsureIsValid()

 {
     if ( !m_cgContext )
     {
 {
     if ( !m_cgContext )
     {

-#if defined(__WXCOCOA__) || ! wxOSX_USE_CARBON
-        wxFAIL_MSG("Cannot create wxDCs lazily");
-#else
+        if (m_invisible)
+            return false;
+            
+#if wxOSX_USE_COCOA_OR_IPHONE
+        if ( wxOSXLockFocus(m_view) )
+        {
+            m_cgContext = wxOSXGetContextFromCurrentNSContext();
+            wxASSERT_MSG( m_cgContext != NULL, _T("Unable to retrieve drawing context from View"));
+        }
+        else
+        {
+            m_invisible = true;
+        }
+#endif
+#if wxOSX_USE_CARBON

         OSStatus status = QDBeginCGContext( GetWindowPort( m_windowRef ) , &m_cgContext );
         if ( status != noErr )
         {
             wxFAIL_MSG("Cannot nest wxDCs on the same window");
         }
         OSStatus status = QDBeginCGContext( GetWindowPort( m_windowRef ) , &m_cgContext );
         if ( status != noErr )
         {
             wxFAIL_MSG("Cannot nest wxDCs on the same window");
         }

-
-        CGContextConcatCTM( m_cgContext, m_windowTransform );
-        CGContextSaveGState( m_cgContext );
-        m_releaseContext = true;
-        if ( m_clipRgn.get() )
+#endif
+        if ( m_cgContext )

         {
         {

-            // the clip region is in device coordinates, so we convert this again to user coordinates
-            wxCFRef<HIMutableShapeRef> hishape( HIShapeCreateMutableCopy( m_clipRgn ) );
-            CGPoint transformedOrigin = CGPointApplyAffineTransform( CGPointZero,m_windowTransform);
-            HIShapeOffset( hishape, -transformedOrigin.x, -transformedOrigin.y );
-            // if the shape is empty, HIShapeReplacePathInCGContext doesn't work
-            if ( HIShapeIsEmpty(hishape))
+            CGContextConcatCTM( m_cgContext, m_windowTransform );
+            CGContextSaveGState( m_cgContext );
+            m_contextSynthesized = true;
+            if ( m_clipRgn.get() )

             {
             {

-                CGRect empty = CGRectMake( 0,0,0,0 );
-                CGContextClipToRect( m_cgContext, empty );
+                // the clip region is in device coordinates, so we convert this again to user coordinates
+                wxCFRef<HIMutableShapeRef> hishape( HIShapeCreateMutableCopy( m_clipRgn ) );
+                CGPoint transformedOrigin = CGPointApplyAffineTransform( CGPointZero,m_windowTransform);
+                HIShapeOffset( hishape, -transformedOrigin.x, -transformedOrigin.y );
+                // if the shape is empty, HIShapeReplacePathInCGContext doesn't work
+                if ( HIShapeIsEmpty(hishape))
+                {
+                    CGRect empty = CGRectMake( 0,0,0,0 );
+                    CGContextClipToRect( m_cgContext, empty );
+                }
+                else
+                {
+                    HIShapeReplacePathInCGContext( hishape, m_cgContext );
+                    CGContextClip( m_cgContext );
+                }

             }
             }

-            else
+            CGContextSaveGState( m_cgContext );
+            
+#if 0 // turn on for debugging of clientdc
+            static float color = 0.5 ;
+            static int channel = 0 ;
+            CGRect bounds = CGRectMake(-1000,-1000,2000,2000);
+            CGContextSetRGBFillColor( m_cgContext, channel == 0 ? color : 0.5 ,
+                channel == 1 ? color : 0.5 , channel == 2 ? color : 0.5 , 1 );
+            CGContextFillRect( m_cgContext, bounds );
+            color += 0.1 ;
+            if ( color > 0.9 )

             {
             {

-                HIShapeReplacePathInCGContext( hishape, m_cgContext );
-                CGContextClip( m_cgContext );
+                color = 0.5 ;
+                channel++ ;
+                if ( channel == 3 )
+                    channel = 0 ;

             }
             }

-        }
-        CGContextSaveGState( m_cgContext );

 #endif
 #endif

+        }

     }
     }

+    return m_cgContext != NULL;

 }
 
 }
 

-// TODO test whether the private CGContextSetCompositeOperation works under 10.3 (using NSCompositingModes)
-
-bool wxMacCoreGraphicsContext::SetLogicalFunction( int function )
+bool wxMacCoreGraphicsContext::SetAntialiasMode(wxAntialiasMode antialias)

 {
 {

-    if (m_logicalFunction == function)
+    if (EnsureIsValid()==false)

         return true;
 
         return true;
 

-    EnsureIsValid();
+    if (m_antialias == antialias)
+        return true;
+    
+    m_antialias = antialias;
+    
+    bool antialiasMode;
+    switch (antialias)
+    {
+        case wxANTIALIAS_DEFAULT:
+            antialiasMode = true;
+            break;
+        case wxANTIALIAS_NONE:
+            antialiasMode = false;
+            break;
+        default:
+            return false;
+    }
+    CGContextSetShouldAntialias(m_cgContext, antialiasMode);
+    return true;
+}

 
 

-    bool retval = false;
-    bool shouldAntiAlias = true;
-    CGBlendMode mode = kCGBlendModeNormal;
+bool wxMacCoreGraphicsContext::SetCompositionMode(wxCompositionMode op)
+{
+    if (EnsureIsValid()==false)
+        return true;

 
 

-#if defined(__WXMAC__) && ( wxOSX_USE_IPHONE || ( MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5 ) )
-#if wxOSX_USE_IPHONE
-    if ( 1 )
-#else
-    if ( UMAGetSystemVersion() >= 0x1050 )
-#endif
+    if ( m_composition == op )
+        return true;
+        
+    m_composition = op;
+    
+    if (m_composition == wxCOMPOSITION_DEST)
+        return true;
+        
+#if wxOSX_USE_COCOA_OR_CARBON
+    if ( UMAGetSystemVersion() < 0x1060 )

     {
     {

-        retval = true;
-        switch ( function )
+        CGCompositeOperation cop = kCGCompositeOperationSourceOver;
+        CGBlendMode mode = kCGBlendModeNormal;
+        switch( op )

         {
         {

-            // TODO find best corresponding porter duff modes
-            case wxCOPY :
-                mode = kCGBlendModeCopy;
-                break;
-            case wxCLEAR :
-                mode = kCGBlendModeClear;
-                break;
-            case wxXOR :
-                mode = kCGBlendModeXOR;
-                shouldAntiAlias = false;
-                break;
-            default :
-                retval = false;
-                break;
+        case wxCOMPOSITION_CLEAR:
+            cop = kCGCompositeOperationClear; 
+            break;
+        case wxCOMPOSITION_SOURCE:
+            cop = kCGCompositeOperationCopy; 
+            break;
+        case wxCOMPOSITION_OVER:
+            mode = kCGBlendModeNormal; 
+            break;
+        case wxCOMPOSITION_IN:
+            cop = kCGCompositeOperationSourceIn; 
+            break;
+        case wxCOMPOSITION_OUT:
+            cop = kCGCompositeOperationSourceOut; 
+            break;
+        case wxCOMPOSITION_ATOP:
+            cop = kCGCompositeOperationSourceAtop; 
+            break;
+        case wxCOMPOSITION_DEST_OVER:
+            cop = kCGCompositeOperationDestinationOver; 
+            break;
+        case wxCOMPOSITION_DEST_IN:
+            cop = kCGCompositeOperationDestinationIn; 
+            break;
+        case wxCOMPOSITION_DEST_OUT:
+            cop = kCGCompositeOperationDestinationOut; 
+            break;
+        case wxCOMPOSITION_DEST_ATOP:
+           cop = kCGCompositeOperationDestinationAtop; 
+            break;
+        case wxCOMPOSITION_XOR:
+            cop = kCGCompositeOperationXOR; 
+            break;
+#if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5
+        case wxCOMPOSITION_ADD:
+            mode = kCGBlendModePlusLighter ;
+            break;
+#endif
+        default:
+            return false;

         }
         }

+        if ( cop != kCGCompositeOperationSourceOver )
+            CGContextSetCompositeOperation(m_cgContext, cop);
+        else
+            CGContextSetBlendMode(m_cgContext, mode);

     }
     }

-    else

 #endif
 #endif

+#if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5
+    else

     {
     {

-        if ( function == wxCOPY )
-        {
-            retval = true;
-        }
-        else if ( function == wxINVERT || function == wxXOR )
+        CGBlendMode mode = kCGBlendModeNormal;
+        switch( op )

         {
         {

-            // change color to white
-            mode = kCGBlendModeExclusion;
-            shouldAntiAlias = false;
-            retval = true;
+        case wxCOMPOSITION_CLEAR:
+            mode = kCGBlendModeClear; 
+            break;
+        case wxCOMPOSITION_SOURCE:
+            mode = kCGBlendModeCopy; 
+            break;
+        case wxCOMPOSITION_OVER:
+            mode = kCGBlendModeNormal; 
+            break;
+        case wxCOMPOSITION_IN:
+            mode = kCGBlendModeSourceIn; 
+            break;
+        case wxCOMPOSITION_OUT:
+            mode = kCGBlendModeSourceOut; 
+            break;
+        case wxCOMPOSITION_ATOP:
+            mode = kCGBlendModeSourceAtop; 
+            break;
+        case wxCOMPOSITION_DEST_OVER:
+            mode = kCGBlendModeDestinationOver; 
+            break;
+        case wxCOMPOSITION_DEST_IN:
+            mode = kCGBlendModeDestinationIn; 
+            break;
+        case wxCOMPOSITION_DEST_OUT:
+            mode = kCGBlendModeDestinationOut; 
+            break;
+        case wxCOMPOSITION_DEST_ATOP:
+           mode = kCGBlendModeDestinationAtop; 
+            break;
+        case wxCOMPOSITION_XOR:
+            mode = kCGBlendModeXOR; 
+            break;
+            
+        case wxCOMPOSITION_ADD:
+            mode = kCGBlendModePlusLighter ;
+            break;
+        default:
+            return false;

         }
         }

+        CGContextSetBlendMode(m_cgContext, mode);

     }
     }

+#endif
+    return true;
+}

 
 

-    if (retval)
-    {
-        m_logicalFunction = function;
-        CGContextSetBlendMode( m_cgContext, mode );
-        CGContextSetShouldAntialias(m_cgContext, shouldAntiAlias);
-    }
-    return retval ;
+void wxMacCoreGraphicsContext::BeginLayer(wxDouble opacity)
+{
+    CGContextSaveGState(m_cgContext);
+    CGContextSetAlpha(m_cgContext, opacity);
+    CGContextBeginTransparencyLayer(m_cgContext, 0);
+}
+
+void wxMacCoreGraphicsContext::EndLayer()
+{
+    CGContextEndTransparencyLayer(m_cgContext);
+    CGContextRestoreGState(m_cgContext);

 }
 
 void wxMacCoreGraphicsContext::Clip( const wxRegion &region )
 {
 }
 
 void wxMacCoreGraphicsContext::Clip( const wxRegion &region )
 {

-#if wxOSX_USE_CARBON
+#if wxOSX_USE_COCOA_OR_CARBON

     if( m_cgContext )
     {
         wxCFRef<HIShapeRef> shape = wxCFRefFromGet(region.GetWXHRGN());
     if( m_cgContext )
     {
         wxCFRef<HIShapeRef> shape = wxCFRefFromGet(region.GetWXHRGN());


@@ -1676,7 +1860,7 @@ void wxMacCoreGraphicsContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDoubl
     }
     else
     {
     }
     else
     {

-#if wxOSX_USE_CARBON
+#if wxOSX_USE_COCOA_OR_CARBON

         // the clipping itself must be stored as device coordinates, otherwise
         // we cannot apply it back correctly
         r.origin= CGPointApplyAffineTransform( r.origin, m_windowTransform );
         // the clipping itself must be stored as device coordinates, otherwise
         // we cannot apply it back correctly
         r.origin= CGPointApplyAffineTransform( r.origin, m_windowTransform );


@@ -1705,7 +1889,7 @@ void wxMacCoreGraphicsContext::ResetClip()
     }
     else
     {
     }
     else
     {

-#if wxOSX_USE_CARBON
+#if wxOSX_USE_COCOA_OR_CARBON

         m_clipRgn.reset();
 #else
     // allow usage as measuring context
         m_clipRgn.reset();
 #else
     // allow usage as measuring context


@@ -1719,7 +1903,11 @@ void wxMacCoreGraphicsContext::StrokePath( const wxGraphicsPath &path )
     if ( m_pen.IsNull() )
         return ;
 
     if ( m_pen.IsNull() )
         return ;
 

-    EnsureIsValid();
+    if (EnsureIsValid()==false)
+        return;
+        
+    if (m_composition == wxCOMPOSITION_DEST)
+        return;

 
     wxQuartzOffsetHelper helper( m_cgContext , ShouldOffset() );
 
 
     wxQuartzOffsetHelper helper( m_cgContext , ShouldOffset() );
 


@@ -1728,8 +1916,14 @@ void wxMacCoreGraphicsContext::StrokePath( const wxGraphicsPath &path )
     CGContextStrokePath( m_cgContext );
 }
 
     CGContextStrokePath( m_cgContext );
 }
 

-void wxMacCoreGraphicsContext::DrawPath( const wxGraphicsPath &path , int fillStyle )
+void wxMacCoreGraphicsContext::DrawPath( const wxGraphicsPath &path , wxPolygonFillMode fillStyle )

 {
 {

+    if (EnsureIsValid()==false)
+        return;
+        
+    if (m_composition == wxCOMPOSITION_DEST)
+        return;
+

     if ( !m_brush.IsNull() && ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
     {
         // when using shading, we cannot draw pen and brush at the same time
     if ( !m_brush.IsNull() && ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
     {
         // when using shading, we cannot draw pen and brush at the same time


@@ -1764,8 +1958,6 @@ void wxMacCoreGraphicsContext::DrawPath( const wxGraphicsPath &path , int fillSt
         }
     }
 
         }
     }
 

-    EnsureIsValid();
-

     if ( !m_brush.IsNull() )
         ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->Apply(this);
     if ( !m_pen.IsNull() )
     if ( !m_brush.IsNull() )
         ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->Apply(this);
     if ( !m_pen.IsNull() )


@@ -1777,12 +1969,16 @@ void wxMacCoreGraphicsContext::DrawPath( const wxGraphicsPath &path , int fillSt
     CGContextDrawPath( m_cgContext , mode );
 }
 
     CGContextDrawPath( m_cgContext , mode );
 }
 

-void wxMacCoreGraphicsContext::FillPath( const wxGraphicsPath &path , int fillStyle )
+void wxMacCoreGraphicsContext::FillPath( const wxGraphicsPath &path , wxPolygonFillMode fillStyle )

 {
     if ( m_brush.IsNull() )
         return;
 
 {
     if ( m_brush.IsNull() )
         return;
 

-    EnsureIsValid();
+    if (EnsureIsValid()==false)
+        return;
+        
+    if (m_composition == wxCOMPOSITION_DEST)
+        return;

 
     if ( ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
     {
 
     if ( ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
     {


@@ -1810,20 +2006,24 @@ void wxMacCoreGraphicsContext::SetNativeContext( CGContextRef cg )
 
     if ( m_cgContext )
     {
 
     if ( m_cgContext )
     {

-        // TODO : when is this necessary - should we add a Flush() method ? CGContextSynchronize( m_cgContext );

         CGContextRestoreGState( m_cgContext );
         CGContextRestoreGState( m_cgContext );
         CGContextRestoreGState( m_cgContext );
         CGContextRestoreGState( m_cgContext );

-        if ( m_releaseContext )
+        if ( m_contextSynthesized )

         {
         {

+            // TODO: in case of performance problems, try issuing this not too 
+            // frequently (half of refresh rate)
+            CGContextFlush(m_cgContext);

 #if wxOSX_USE_CARBON
             QDEndCGContext( GetWindowPort( m_windowRef ) , &m_cgContext);
 #if wxOSX_USE_CARBON
             QDEndCGContext( GetWindowPort( m_windowRef ) , &m_cgContext);

+#endif
+#if wxOSX_USE_COCOA_OR_IPHONE
+            wxOSXUnlockFocus(m_view);

 #endif
         }
         else
             CGContextRelease(m_cgContext);
     }
 
 #endif
         }
         else
             CGContextRelease(m_cgContext);
     }
 

-

     m_cgContext = cg;
 
     // FIXME: This check is needed because currently we need to use a DC/GraphicsContext
     m_cgContext = cg;
 
     // FIXME: This check is needed because currently we need to use a DC/GraphicsContext


@@ -1839,7 +2039,7 @@ void wxMacCoreGraphicsContext::SetNativeContext( CGContextRef cg )
         CGContextSaveGState( m_cgContext );
         CGContextSetTextMatrix( m_cgContext, CGAffineTransformIdentity );
         CGContextSaveGState( m_cgContext );
         CGContextSaveGState( m_cgContext );
         CGContextSetTextMatrix( m_cgContext, CGAffineTransformIdentity );
         CGContextSaveGState( m_cgContext );

-        m_releaseContext = false;
+        m_contextSynthesized = false;

     }
 }
 
     }
 }
 


@@ -1875,7 +2075,12 @@ void wxMacCoreGraphicsContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDo
 
 void wxMacCoreGraphicsContext::DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 {
 
 void wxMacCoreGraphicsContext::DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 {

-    EnsureIsValid();
+    if (EnsureIsValid()==false)
+        return;
+
+    if (m_composition == wxCOMPOSITION_DEST)
+        return;
+        

 #ifdef __WXMAC__
     wxMacCoreGraphicsBitmapData* refdata  =static_cast<wxMacCoreGraphicsBitmapData*>(bmp.GetRefData());
     CGImageRef image = refdata->GetBitmap();
 #ifdef __WXMAC__
     wxMacCoreGraphicsBitmapData* refdata  =static_cast<wxMacCoreGraphicsBitmapData*>(bmp.GetRefData());
     CGImageRef image = refdata->GetBitmap();


@@ -1912,38 +2117,49 @@ void wxMacCoreGraphicsContext::DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble
 
 void wxMacCoreGraphicsContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 {
 
 void wxMacCoreGraphicsContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 {

-    EnsureIsValid();
+    if (EnsureIsValid()==false)
+        return;
+        
+    if (m_composition == wxCOMPOSITION_DEST)
+        return;

 
     CGRect r = CGRectMake( (CGFloat) 0.0 , (CGFloat) 0.0 , (CGFloat) w , (CGFloat) h );
     CGContextSaveGState( m_cgContext );
     CGContextTranslateCTM( m_cgContext,(CGFloat) x ,(CGFloat) (y + h) );
     CGContextScaleCTM( m_cgContext, 1, -1 );
 
     CGRect r = CGRectMake( (CGFloat) 0.0 , (CGFloat) 0.0 , (CGFloat) w , (CGFloat) h );
     CGContextSaveGState( m_cgContext );
     CGContextTranslateCTM( m_cgContext,(CGFloat) x ,(CGFloat) (y + h) );
     CGContextScaleCTM( m_cgContext, 1, -1 );

-#if wxOSX_USE_CARBON
+#if wxOSX_USE_COCOA_OR_CARBON

     PlotIconRefInContext( m_cgContext , &r , kAlignNone , kTransformNone ,
     PlotIconRefInContext( m_cgContext , &r , kAlignNone , kTransformNone ,

-        NULL , kPlotIconRefNormalFlags , MAC_WXHICON( icon.GetHICON() ) );
+        NULL , kPlotIconRefNormalFlags , icon.GetHICON() );

 #endif
     CGContextRestoreGState( m_cgContext );
 }
 
 void wxMacCoreGraphicsContext::PushState()
 {
 #endif
     CGContextRestoreGState( m_cgContext );
 }
 
 void wxMacCoreGraphicsContext::PushState()
 {

-    EnsureIsValid();
-
+    if (EnsureIsValid()==false)
+        return;
+        

     CGContextSaveGState( m_cgContext );
 }
 
 void wxMacCoreGraphicsContext::PopState()
 {
     CGContextSaveGState( m_cgContext );
 }
 
 void wxMacCoreGraphicsContext::PopState()
 {

-    EnsureIsValid();
-
+    if (EnsureIsValid()==false)
+        return;
+        

     CGContextRestoreGState( m_cgContext );
 }
 
     CGContextRestoreGState( m_cgContext );
 }
 

-void wxMacCoreGraphicsContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
+void wxMacCoreGraphicsContext::DoDrawText( const wxString &str, wxDouble x, wxDouble y )

 {
     wxCHECK_RET( !m_font.IsNull(), wxT("wxMacCoreGraphicsContext::DrawText - no valid font set") );
 
 {
     wxCHECK_RET( !m_font.IsNull(), wxT("wxMacCoreGraphicsContext::DrawText - no valid font set") );
 

-    EnsureIsValid();
+    if (EnsureIsValid()==false)
+        return;
+        
+    if (m_composition == wxCOMPOSITION_DEST)
+        return;
+

 #if wxOSX_USE_CORE_TEXT
     if ( UMAGetSystemVersion() >= 0x1050 )
     {
 #if wxOSX_USE_CORE_TEXT
     if ( UMAGetSystemVersion() >= 0x1050 )
     {


@@ -1984,7 +2200,7 @@ void wxMacCoreGraphicsContext::DrawText( const wxString &str, wxDouble x, wxDoub
     CGContextSaveGState(m_cgContext);
 
     CGColorRef col = wxMacCreateCGColor( fref->GetColour() );
     CGContextSaveGState(m_cgContext);
 
     CGColorRef col = wxMacCreateCGColor( fref->GetColour() );

-    CGContextSetTextDrawingMode (m_cgContext, kCGTextFill); 
+    CGContextSetTextDrawingMode (m_cgContext, kCGTextFill);

     CGContextSetFillColorWithColor( m_cgContext, col );
 
     wxCFStringRef text(str, wxLocale::GetSystemEncoding() );
     CGContextSetFillColorWithColor( m_cgContext, col );
 
     wxCFStringRef text(str, wxLocale::GetSystemEncoding() );


@@ -1995,16 +2211,23 @@ void wxMacCoreGraphicsContext::DrawText( const wxString &str, wxDouble x, wxDoub
 #endif
 }
 
 #endif
 }
 

-void wxMacCoreGraphicsContext::DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle )
+void wxMacCoreGraphicsContext::DoDrawRotatedText(const wxString &str,
+                                                 wxDouble x, wxDouble y,
+                                                 wxDouble angle)

 {
     wxCHECK_RET( !m_font.IsNull(), wxT("wxMacCoreGraphicsContext::DrawText - no valid font set") );
 
 {
     wxCHECK_RET( !m_font.IsNull(), wxT("wxMacCoreGraphicsContext::DrawText - no valid font set") );
 

-    EnsureIsValid();
+    if (EnsureIsValid()==false)
+        return;
+        
+    if (m_composition == wxCOMPOSITION_DEST)
+        return;
+

 #if wxOSX_USE_CORE_TEXT
     if ( UMAGetSystemVersion() >= 0x1050 )
     {
         // default implementation takes care of rotation and calls non rotated DrawText afterwards
 #if wxOSX_USE_CORE_TEXT
     if ( UMAGetSystemVersion() >= 0x1050 )
     {
         // default implementation takes care of rotation and calls non rotated DrawText afterwards

-        wxGraphicsContext::DrawText( str, x, y, angle );
+        wxGraphicsContext::DoDrawRotatedText( str, x, y, angle );

         return;
     }
 #endif
         return;
     }
 #endif


@@ -2094,7 +2317,7 @@ void wxMacCoreGraphicsContext::DrawText( const wxString &str, wxDouble x, wxDoub
 #endif
 #if wxOSX_USE_IPHONE
     // default implementation takes care of rotation and calls non rotated DrawText afterwards
 #endif
 #if wxOSX_USE_IPHONE
     // default implementation takes care of rotation and calls non rotated DrawText afterwards

-    wxGraphicsContext::DrawText( str, x, y, angle );
+    wxGraphicsContext::DoDrawRotatedText( str, x, y, angle );

 #endif
 }
 
 #endif
 }
 


@@ -2186,7 +2409,7 @@ void wxMacCoreGraphicsContext::GetTextExtent( const wxString &str, wxDouble *wid
 
     wxCFStringRef text(str, wxLocale::GetSystemEncoding() );
     CGSize sz = MeasureTextInContext( fref->GetUIFont() , text.AsNSString() );
 
     wxCFStringRef text(str, wxLocale::GetSystemEncoding() );
     CGSize sz = MeasureTextInContext( fref->GetUIFont() , text.AsNSString() );

-    
+

     if ( height )
         *height = sz.height;
         /*
     if ( height )
         *height = sz.height;
         /*


@@ -2268,7 +2491,7 @@ void wxMacCoreGraphicsContext::GetPartialTextExtents(const wxString& text, wxArr
 #else
         ATSLayoutRecord *layoutRecords = NULL;
         ItemCount glyphCount = 0;
 #else
         ATSLayoutRecord *layoutRecords = NULL;
         ItemCount glyphCount = 0;

-        
+

         // Get the glyph extents
         OSStatus err = ::ATSUDirectGetLayoutDataArrayPtrFromTextLayout(atsuLayout,
                                                                        0,
         // Get the glyph extents
         OSStatus err = ::ATSUDirectGetLayoutDataArrayPtrFromTextLayout(atsuLayout,
                                                                        0,


@@ -2277,7 +2500,7 @@ void wxMacCoreGraphicsContext::GetPartialTextExtents(const wxString& text, wxArr
                                                                        &layoutRecords,
                                                                        &glyphCount);
         wxASSERT(glyphCount == (text.length()+1));
                                                                        &layoutRecords,
                                                                        &glyphCount);
         wxASSERT(glyphCount == (text.length()+1));

-        
+

         if ( err == noErr && glyphCount == (text.length()+1))
         {
             for ( int pos = 1; pos < (int)glyphCount ; pos ++ )
         if ( err == noErr && glyphCount == (text.length()+1))
         {
             for ( int pos = 1; pos < (int)glyphCount ; pos ++ )


@@ -2285,7 +2508,7 @@ void wxMacCoreGraphicsContext::GetPartialTextExtents(const wxString& text, wxArr
                 widths[pos-1] = FixedToInt( layoutRecords[pos].realPos );
             }
         }
                 widths[pos-1] = FixedToInt( layoutRecords[pos].realPos );
             }
         }

-        
+

         ::ATSUDirectReleaseLayoutDataArrayPtr(NULL,
                                               kATSUDirectDataLayoutRecordATSLayoutRecordCurrent,
                                               (void **) &layoutRecords);
         ::ATSUDirectReleaseLayoutDataArrayPtr(NULL,
                                               kATSUDirectDataLayoutRecordATSLayoutRecordCurrent,
                                               (void **) &layoutRecords);


@@ -2416,10 +2639,6 @@ wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer()
     return &gs_MacCoreGraphicsRenderer;
 }
 
     return &gs_MacCoreGraphicsRenderer;
 }
 

-#if defined( __WXCOCOA__ ) || wxOSX_USE_COCOA
-extern CGContextRef wxMacGetContextFromCurrentNSContext() ;
-#endif
-

 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContext( const wxWindowDC& dc )
 {
     const wxDCImpl* impl = dc.GetImpl();
 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContext( const wxWindowDC& dc )
 {
     const wxDCImpl* impl = dc.GetImpl();


@@ -2429,12 +2648,13 @@ wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContext( const wxWindowDC&
         int w, h;
         win_impl->GetSize( &w, &h );
         CGContextRef cgctx = 0;
         int w, h;
         win_impl->GetSize( &w, &h );
         CGContextRef cgctx = 0;

-#ifdef __WXMAC__
-        cgctx =  (CGContextRef)(win_impl->GetWindow()->MacGetCGContextRef());
-#else
-        cgctx = wxMacGetContextFromCurrentNSContext() ;
-#endif
-        return new wxMacCoreGraphicsContext( this, cgctx, (wxDouble) w, (wxDouble) h );
+
+        wxASSERT_MSG(win_impl->GetWindow(), "Invalid wxWindow in wxMacCoreGraphicsRenderer::CreateContext");
+        if (win_impl->GetWindow())
+            cgctx =  (CGContextRef)(win_impl->GetWindow()->MacGetCGContextRef());
+
+        if (cgctx != 0)
+            return new wxMacCoreGraphicsContext( this, cgctx, (wxDouble) w, (wxDouble) h );

     }
     return NULL;
 }
     }
     return NULL;
 }