X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b4ff8b3e4e8e906806bafbb1acfd7248b89c5994..47e175a24f862aa8b7ca7dd4a2bb5957991e7f2d:/src/osx/carbon/graphics.cpp

diff --git a/src/osx/carbon/graphics.cpp b/src/osx/carbon/graphics.cpp
index 4a1e139f31..c42ffba7f7 100644
--- a/src/osx/carbon/graphics.cpp
+++ b/src/osx/carbon/graphics.cpp
@@ -1,5 +1,5 @@
 /////////////////////////////////////////////////////////////////////////////
-// Name:        src/osx/carbon/dccg.cpp
+// Name:        src/osx/carbon/graphics.cpp
 // Purpose:     wxDC class
 // Author:      Stefan Csomor
 // Modified by:
@@ -98,7 +98,7 @@ typedef enum CGCompositeOperation {
    kCGCompositeOperationDestinationAtop = 9,
    kCGCompositeOperationXOR             = 10,
    kCGCompositeOperationPlusDarker      = 11,
-// NS only, unsupported by CG : Highlight 
+// NS only, unsupported by CG : Highlight
    kCGCompositeOperationPlusLighter     = 12
 } CGCompositeOperation ;
 
@@ -113,11 +113,9 @@ extern "C"
 // constants
 //-----------------------------------------------------------------------------
 
-#if !defined( __DARWIN__ ) || defined(__MWERKS__)
 #ifndef M_PI
 const double M_PI = 3.14159265358979;
 #endif
-#endif
 
 static const double RAD2DEG = 180.0 / M_PI;
 
@@ -149,26 +147,13 @@ OSStatus wxMacDrawCGImage(
 
 CGColorRef wxMacCreateCGColor( const wxColour& col )
 {
-    CGColorRef retval = 0;
-#ifdef __WXMAC__
-    retval = col.CreateCGColor();
-#else
-// TODO add conversion NSColor - CGColorRef (obj-c)
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5
-    if ( CGColorCreateGenericRGB )
-        retval = CGColorCreateGenericRGB( col.Red() / 255.0 , col.Green() / 255.0, col.Blue() / 255.0, col.Alpha() / 255.0 );
-    else
-#endif
-    {
-        CGFloat components[4] = { col.Red() / 255.0, col.Green() / 255.0, col.Blue()  / 255.0, col.Alpha() / 255.0 } ;
-        retval = CGColorCreate( wxMacGetGenericRGBColorSpace() , components ) ;
-    }
+    CGColorRef retval = col.CreateCGColor();
 
-#endif
+    wxASSERT(retval != NULL);
     return retval;
 }
 
-#if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5 && wxOSX_USE_CORE_TEXT
+#if wxOSX_USE_CORE_TEXT
 
 CTFontRef wxMacCreateCTFont( const wxFont& font )
 {
@@ -225,7 +210,7 @@ class ImagePattern : public wxMacCoreGraphicsPattern
 public :
     ImagePattern( const wxBitmap* bmp , const CGAffineTransform& transform )
     {
-        wxASSERT( bmp && bmp->Ok() );
+        wxASSERT( bmp && bmp->IsOk() );
 #ifdef __WXMAC__
         Init( (CGImageRef) bmp->CreateCGImage() , transform );
 #endif
@@ -453,32 +438,32 @@ wxMacCoreGraphicsPenData::wxMacCoreGraphicsPenData( wxGraphicsRenderer* renderer
 
     switch ( pen.GetStyle() )
     {
-        case wxSOLID :
+        case wxPENSTYLE_SOLID:
             break;
 
-        case wxDOT :
+        case wxPENSTYLE_DOT:
             m_count = WXSIZEOF(dotted);
             m_userLengths = new CGFloat[ m_count ] ;
             memcpy( m_userLengths, dotted, sizeof(dotted) );
             m_lengths = m_userLengths;
             break;
 
-        case wxLONG_DASH :
+        case wxPENSTYLE_LONG_DASH:
             m_count = WXSIZEOF(dashed);
             m_lengths = dashed;
             break;
 
-        case wxSHORT_DASH :
+        case wxPENSTYLE_SHORT_DASH:
             m_count = WXSIZEOF(short_dashed);
             m_lengths = short_dashed;
             break;
 
-        case wxDOT_DASH :
+        case wxPENSTYLE_DOT_DASH:
             m_count = WXSIZEOF(dotted_dashed);
             m_lengths = dotted_dashed;
             break;
 
-        case wxUSER_DASH :
+        case wxPENSTYLE_USER_DASH:
             wxDash *dashes;
             m_count = pen.GetDashes( &dashes );
             if ((dashes != NULL) && (m_count > 0))
@@ -497,10 +482,10 @@ wxMacCoreGraphicsPenData::wxMacCoreGraphicsPenData( wxGraphicsRenderer* renderer
             m_lengths = m_userLengths;
             break;
 
-        case wxSTIPPLE :
+        case wxPENSTYLE_STIPPLE:
             {
                 wxBitmap* bmp = pen.GetStipple();
-                if ( bmp && bmp->Ok() )
+                if ( bmp && bmp->IsOk() )
                 {
                     m_colorSpace.reset( CGColorSpaceCreatePattern( NULL ) );
                     m_pattern.reset( (CGPatternRef) *( new ImagePattern( bmp , CGAffineTransformMakeScale( 1,-1 ) ) ) );
@@ -573,20 +558,6 @@ void wxMacCoreGraphicsPenData::Apply( wxGraphicsContext* context )
 // Brush
 //
 
-static const char *gs_stripedback_xpm[] = {
-/* columns rows colors chars-per-pixel */
-"4 4 2 1",
-". c #F0F0F0",
-"X c #ECECEC",
-/* pixels */
-"....",
-"....",
-"XXXX",
-"XXXX"
-};
-
-wxBitmap gs_stripedback_bmp( wxImage( (const char* const* ) gs_stripedback_xpm  ), -1 ) ;
-
 // make sure we all use one class for all conversions from wx to native colour
 
 class wxMacCoreGraphicsColour
@@ -661,7 +632,7 @@ wxMacCoreGraphicsColour::wxMacCoreGraphicsColour( const wxBrush &brush )
     {
         // now brush is a bitmap
         wxBitmap* bmp = brush.GetStipple();
-        if ( bmp && bmp->Ok() )
+        if ( bmp && bmp->IsOk() )
         {
             m_isPattern = true;
             m_patternColorComponents = new CGFloat[1] ;
@@ -680,15 +651,18 @@ public:
     ~wxMacCoreGraphicsBrushData ();
 
     virtual void Apply( wxGraphicsContext* context );
-    void CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
-        const wxColour&c1, const wxColour&c2 );
-    void CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
-    const wxColour &oColor, const wxColour &cColor );
+    void CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
+                                   wxDouble x2, wxDouble y2,
+                                   const wxGraphicsGradientStops& stops);
+    void CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
+                                   wxDouble xc, wxDouble yc, wxDouble radius,
+                                   const wxGraphicsGradientStops& stops);
 
     virtual bool IsShading() { return m_isShading; }
     CGShadingRef GetShading() { return m_shading; }
 protected:
-    CGFunctionRef CreateGradientFunction( const wxColour& c1, const wxColour& c2 );
+    CGFunctionRef CreateGradientFunction(const wxGraphicsGradientStops& stops);
+
     static void CalculateShadingValues (void *info, const CGFloat *in, CGFloat *out);
     virtual void Init();
 
@@ -697,7 +671,42 @@ protected:
     bool m_isShading;
     CGFunctionRef m_gradientFunction;
     CGShadingRef m_shading;
-    CGFloat *m_gradientComponents;
+
+    // information about a single gradient component
+    struct GradientComponent
+    {
+        CGFloat pos;
+        CGFloat red;
+        CGFloat green;
+        CGFloat blue;
+        CGFloat alpha;
+    };
+
+    // and information about all of them
+    struct GradientComponents
+    {
+        GradientComponents()
+        {
+            count = 0;
+            comps = NULL;
+        }
+
+        void Init(unsigned count_)
+        {
+            count = count_;
+            comps = new GradientComponent[count];
+        }
+
+        ~GradientComponents()
+        {
+            delete [] comps;
+        }
+
+        unsigned count;
+        GradientComponent *comps;
+    };
+
+    GradientComponents m_gradientComponents;
 };
 
 wxMacCoreGraphicsBrushData::wxMacCoreGraphicsBrushData( wxGraphicsRenderer* renderer) : wxGraphicsObjectRefData( renderer )
@@ -705,19 +714,24 @@ wxMacCoreGraphicsBrushData::wxMacCoreGraphicsBrushData( wxGraphicsRenderer* rend
     Init();
 }
 
-void wxMacCoreGraphicsBrushData::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
-        const wxColour&c1, const wxColour&c2 )
+void
+wxMacCoreGraphicsBrushData::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
+                                                      wxDouble x2, wxDouble y2,
+                                                      const wxGraphicsGradientStops& stops)
 {
-    m_gradientFunction = CreateGradientFunction( c1, c2 );
+    m_gradientFunction = CreateGradientFunction(stops);
     m_shading = CGShadingCreateAxial( wxMacGetGenericRGBColorSpace(), CGPointMake((CGFloat) x1, (CGFloat) y1),
                                         CGPointMake((CGFloat) x2,(CGFloat) y2), m_gradientFunction, true, true ) ;
     m_isShading = true ;
 }
 
-void wxMacCoreGraphicsBrushData::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
-    const wxColour &oColor, const wxColour &cColor )
+void
+wxMacCoreGraphicsBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
+                                                      wxDouble xc, wxDouble yc,
+                                                      wxDouble radius,
+                                                      const wxGraphicsGradientStops& stops)
 {
-    m_gradientFunction = CreateGradientFunction( oColor, cColor );
+    m_gradientFunction = CreateGradientFunction(stops);
     m_shading = CGShadingCreateRadial( wxMacGetGenericRGBColorSpace(), CGPointMake((CGFloat) xo,(CGFloat) yo), 0,
                                         CGPointMake((CGFloat) xc,(CGFloat) yc), (CGFloat) radius, m_gradientFunction, true, true ) ;
     m_isShading = true ;
@@ -737,15 +751,12 @@ wxMacCoreGraphicsBrushData::~wxMacCoreGraphicsBrushData()
 
     if( m_gradientFunction )
         CGFunctionRelease(m_gradientFunction);
-
-    delete[] m_gradientComponents;
 }
 
 void wxMacCoreGraphicsBrushData::Init()
 {
     m_gradientFunction = NULL;
     m_shading = NULL;
-    m_gradientComponents = NULL;
     m_isShading = false;
 }
 
@@ -765,30 +776,70 @@ void wxMacCoreGraphicsBrushData::Apply( wxGraphicsContext* context )
 
 void wxMacCoreGraphicsBrushData::CalculateShadingValues (void *info, const CGFloat *in, CGFloat *out)
 {
-    CGFloat* colors = (CGFloat*) info ;
+    const GradientComponents& stops = *(GradientComponents*) info ;
+
     CGFloat f = *in;
-    for( int i = 0 ; i < 4 ; ++i )
+    if (f <= 0.0)
+    {
+        // Start
+        out[0] = stops.comps[0].red;
+        out[1] = stops.comps[0].green;
+        out[2] = stops.comps[0].blue;
+        out[3] = stops.comps[0].alpha;
+    }
+    else if (f >= 1.0)
     {
-        out[i] = colors[i] + ( colors[4+i] - colors[i] ) * f;
+        // end
+        out[0] = stops.comps[stops.count - 1].red;
+        out[1] = stops.comps[stops.count - 1].green;
+        out[2] = stops.comps[stops.count - 1].blue;
+        out[3] = stops.comps[stops.count - 1].alpha;
+    }
+    else
+    {
+        // Find first component with position greater than f
+        unsigned i;
+        for ( i = 0; i < stops.count; i++ )
+        {
+            if (stops.comps[i].pos > f)
+                break;
+        }
+
+        // Interpolated between stops
+        CGFloat diff = (f - stops.comps[i-1].pos);
+        CGFloat range = (stops.comps[i].pos - stops.comps[i-1].pos);
+        CGFloat fact = diff / range;
+
+        out[0] = stops.comps[i - 1].red + (stops.comps[i].red - stops.comps[i - 1].red) * fact;
+        out[1] = stops.comps[i - 1].green + (stops.comps[i].green - stops.comps[i - 1].green) * fact;
+        out[2] = stops.comps[i - 1].blue + (stops.comps[i].blue - stops.comps[i - 1].blue) * fact;
+        out[3] = stops.comps[i - 1].alpha + (stops.comps[i].alpha - stops.comps[i - 1].alpha) * fact;
     }
 }
 
-CGFunctionRef wxMacCoreGraphicsBrushData::CreateGradientFunction( const wxColour& c1, const wxColour& c2 )
+CGFunctionRef
+wxMacCoreGraphicsBrushData::CreateGradientFunction(const wxGraphicsGradientStops& stops)
 {
+
     static const CGFunctionCallbacks callbacks = { 0, &CalculateShadingValues, NULL };
     static const CGFloat input_value_range [2] = { 0, 1 };
     static const CGFloat output_value_ranges [8] = { 0, 1, 0, 1, 0, 1, 0, 1 };
-    m_gradientComponents = new CGFloat[8] ;
-    m_gradientComponents[0] = (CGFloat) (c1.Red() / 255.0);
-    m_gradientComponents[1] = (CGFloat) (c1.Green() / 255.0);
-    m_gradientComponents[2] = (CGFloat) (c1.Blue() / 255.0);
-    m_gradientComponents[3] = (CGFloat) (c1.Alpha() / 255.0);
-    m_gradientComponents[4] = (CGFloat) (c2.Red() / 255.0);
-    m_gradientComponents[5] = (CGFloat) (c2.Green() / 255.0);
-    m_gradientComponents[6] = (CGFloat) (c2.Blue() / 255.0);
-    m_gradientComponents[7] = (CGFloat) (c2.Alpha() / 255.0);
-
-    return CGFunctionCreate ( m_gradientComponents,  1,
+
+    m_gradientComponents.Init(stops.GetCount());
+    for ( unsigned i = 0; i < m_gradientComponents.count; i++ )
+    {
+        const wxGraphicsGradientStop stop = stops.Item(i);
+
+        m_gradientComponents.comps[i].pos = stop.GetPosition();
+
+        const wxColour col = stop.GetColour();
+        m_gradientComponents.comps[i].red = (CGFloat) (col.Red() / 255.0);
+        m_gradientComponents.comps[i].green = (CGFloat) (col.Green() / 255.0);
+        m_gradientComponents.comps[i].blue = (CGFloat) (col.Blue() / 255.0);
+        m_gradientComponents.comps[i].alpha = (CGFloat) (col.Alpha() / 255.0);
+    }
+
+    return CGFunctionCreate ( &m_gradientComponents,  1,
                             input_value_range,
                             4,
                             output_value_ranges,
@@ -869,19 +920,19 @@ wxMacCoreGraphicsFontData::wxMacCoreGraphicsFontData(wxGraphicsRenderer* rendere
             kATSUSizeTag ,
             kATSUColorTag ,
     };
-    ByteCount atsuSizes[sizeof(atsuTags) / sizeof(ATSUAttributeTag)] =
+    ByteCount atsuSizes[WXSIZEOF(atsuTags)] =
     {
             sizeof( Fixed ) ,
             sizeof( RGBColor ) ,
     };
-    ATSUAttributeValuePtr atsuValues[sizeof(atsuTags) / sizeof(ATSUAttributeTag)] =
+    ATSUAttributeValuePtr atsuValues[WXSIZEOF(atsuTags)] =
     {
             &atsuSize ,
             &atsuColor ,
     };
 
     status = ::ATSUSetAttributes(
-        m_macATSUIStyle, sizeof(atsuTags) / sizeof(ATSUAttributeTag) ,
+        m_macATSUIStyle, WXSIZEOF(atsuTags),
         atsuTags, atsuSizes, atsuValues);
 
     wxASSERT_MSG( status == noErr , wxT("couldn't modify ATSU style") );
@@ -904,20 +955,29 @@ wxMacCoreGraphicsFontData::~wxMacCoreGraphicsFontData()
 #endif
 }
 
-class wxMacCoreGraphicsBitmapData : public wxGraphicsObjectRefData
+class wxMacCoreGraphicsBitmapData : public wxGraphicsBitmapData
 {
 public:
     wxMacCoreGraphicsBitmapData( wxGraphicsRenderer* renderer, CGImageRef bitmap, bool monochrome );
     ~wxMacCoreGraphicsBitmapData();
 
     virtual CGImageRef GetBitmap() { return m_bitmap; }
+    virtual void* GetNativeBitmap() const { return m_bitmap; }
     bool IsMonochrome() { return m_monochrome; }
+
+#if wxUSE_IMAGE
+    wxImage ConvertToImage() const
+    {
+        return wxBitmap(m_bitmap).ConvertToImage();
+    }
+#endif // wxUSE_IMAGE
+
 private :
     CGImageRef m_bitmap;
     bool m_monochrome;
 };
 
-wxMacCoreGraphicsBitmapData::wxMacCoreGraphicsBitmapData( wxGraphicsRenderer* renderer, CGImageRef bitmap, bool monochrome ) : wxGraphicsObjectRefData( renderer ),
+wxMacCoreGraphicsBitmapData::wxMacCoreGraphicsBitmapData( wxGraphicsRenderer* renderer, CGImageRef bitmap, bool monochrome ) : wxGraphicsBitmapData( renderer ),
     m_bitmap(bitmap), m_monochrome(monochrome)
 {
 }
@@ -927,6 +987,7 @@ wxMacCoreGraphicsBitmapData::~wxMacCoreGraphicsBitmapData()
     CGImageRelease( m_bitmap );
 }
 
+
 //
 // Graphics Matrix
 //
@@ -1016,7 +1077,7 @@ wxGraphicsObjectRefData *wxMacCoreGraphicsMatrixData::Clone() const
 // concatenates the matrix
 void wxMacCoreGraphicsMatrixData::Concat( const wxGraphicsMatrixData *t )
 {
-    m_matrix = CGAffineTransformConcat(m_matrix, *((CGAffineTransform*) t->GetNativeMatrix()) );
+    m_matrix = CGAffineTransformConcat(*((CGAffineTransform*) t->GetNativeMatrix()), m_matrix );
 }
 
 // sets the matrix to the respective values
@@ -1152,9 +1213,12 @@ public :
     // appends a rectangle as a new closed subpath
     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 
-    // appends an ellipsis as a new closed subpath fitting the passed rectangle
+    // appends a circle as a new closed subpath
     virtual void AddCircle( wxDouble x, wxDouble y, wxDouble r );
 
+    // appends an ellipsis as a new closed subpath fitting the passed rectangle
+    virtual void AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
+
     // draws a an arc to two tangents connecting (current) to (x1,y1) and (x1,y1) to (x2,y2), also a straight line from (current) to (x1,y1)
     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r );
 
@@ -1171,7 +1235,7 @@ public :
     virtual void Transform( const wxGraphicsMatrixData* matrix );
 
     // gets the bounding box enclosing all points (possibly including control points)
-    virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *y) const;
+    virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const;
 
     virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxODDEVEN_RULE) const;
 private :
@@ -1231,7 +1295,12 @@ void wxMacCoreGraphicsPathData::AddRectangle( wxDouble x, wxDouble y, wxDouble w
 
 void wxMacCoreGraphicsPathData::AddCircle( wxDouble x, wxDouble y , wxDouble r )
 {
-    CGPathAddArc( m_path , NULL , (CGFloat) x , (CGFloat) y , (CGFloat) r , (CGFloat) 0.0 , (CGFloat) (2 * M_PI) , true );
+    CGPathAddEllipseInRect( m_path, NULL, CGRectMake(x-r,y-r,2*r,2*r));
+}
+
+void wxMacCoreGraphicsPathData::AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
+{
+    CGPathAddEllipseInRect( m_path, NULL, CGRectMake(x,y,w,h));
 }
 
 // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
@@ -1310,15 +1379,10 @@ public:
 
     wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer);
 
-    wxMacCoreGraphicsContext();
-
     ~wxMacCoreGraphicsContext();
 
     void Init();
 
-    // returns the size of the graphics context in device coordinates
-    virtual void GetSize( wxDouble* width, wxDouble* height);
-
     virtual void StartPage( wxDouble width, wxDouble height );
 
     virtual void EndPage();
@@ -1344,12 +1408,14 @@ public:
 
     virtual bool SetAntialiasMode(wxAntialiasMode antialias);
 
+    virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation);
+    
     virtual bool SetCompositionMode(wxCompositionMode op);
 
     virtual void BeginLayer(wxDouble opacity);
 
     virtual void EndLayer();
-    
+
     //
     // transformation
     //
@@ -1386,6 +1452,9 @@ public:
 
     virtual bool ShouldOffset() const
     {
+        if ( !m_enableOffset )
+            return false;
+        
         int penwidth = 0 ;
         if ( !m_pen.IsNull() )
         {
@@ -1413,13 +1482,19 @@ public:
     virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 
     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
+    
+    // fast convenience methods
+    
+    
+    virtual void DrawRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h ); 
 
     void SetNativeContext( CGContextRef cg );
 
-    DECLARE_DYNAMIC_CLASS_NO_COPY(wxMacCoreGraphicsContext)
+    wxDECLARE_NO_COPY_CLASS(wxMacCoreGraphicsContext);
 
 private:
     bool EnsureIsValid();
+    void CheckInvariants() const;
 
     virtual void DoDrawText( const wxString &str, wxDouble x, wxDouble y );
     virtual void DoDrawRotatedText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle );
@@ -1432,8 +1507,6 @@ private:
 #endif
     bool m_contextSynthesized;
     CGAffineTransform m_windowTransform;
-    wxDouble m_width;
-    wxDouble m_height;
     bool m_invisible;
 
 #if wxOSX_USE_COCOA_OR_CARBON
@@ -1457,8 +1530,6 @@ private:
 // wxMacCoreGraphicsContext implementation
 //-----------------------------------------------------------------------------
 
-IMPLEMENT_DYNAMIC_CLASS(wxMacCoreGraphicsContext, wxGraphicsContext)
-
 class wxQuartzOffsetHelper
 {
 public :
@@ -1467,14 +1538,23 @@ public :
         m_cg = cg;
         m_offset = offset;
         if ( m_offset )
-            CGContextTranslateCTM( m_cg, (CGFloat) 0.5, (CGFloat) 0.5 );
+        {
+            m_userOffset = CGContextConvertSizeToUserSpace( m_cg, CGSizeMake( 0.5 , 0.5 ) );
+            CGContextTranslateCTM( m_cg, m_userOffset.width , m_userOffset.height );
+        }
+        else
+        {
+            m_userOffset = CGSizeMake(0.0, 0.0);
+        }
+
     }
     ~wxQuartzOffsetHelper( )
     {
         if ( m_offset )
-            CGContextTranslateCTM( m_cg, (CGFloat) -0.5, (CGFloat) -0.5 );
+            CGContextTranslateCTM( m_cg, -m_userOffset.width , -m_userOffset.height );
     }
 public :
+    CGSize m_userOffset;
     CGContextRef m_cg;
     bool m_offset;
 } ;
@@ -1492,6 +1572,8 @@ void wxMacCoreGraphicsContext::Init()
     m_view = NULL;
 #endif
     m_invisible = false;
+    m_antialias = wxANTIALIAS_DEFAULT;
+    m_interpolation = wxINTERPOLATION_DEFAULT;
 }
 
 wxMacCoreGraphicsContext::wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer, CGContextRef cgcontext, wxDouble width, wxDouble height ) : wxGraphicsContext(renderer)
@@ -1507,6 +1589,7 @@ wxMacCoreGraphicsContext::wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer
 {
     Init();
     m_windowRef = window;
+    m_enableOffset = true;
 }
 #endif
 
@@ -1514,6 +1597,7 @@ wxMacCoreGraphicsContext::wxMacCoreGraphicsContext( wxGraphicsRenderer* renderer
 {
     Init();
 
+    m_enableOffset = true;
     wxSize sz = window->GetSize();
     m_width = sz.x;
     m_height = sz.y;
@@ -1550,24 +1634,19 @@ wxMacCoreGraphicsContext::wxMacCoreGraphicsContext(wxGraphicsRenderer* renderer)
     Init();
 }
 
-wxMacCoreGraphicsContext::wxMacCoreGraphicsContext() : wxGraphicsContext(NULL)
-{
-    Init();
-    wxLogDebug(wxT("Illegal Constructor called"));
-}
-
 wxMacCoreGraphicsContext::~wxMacCoreGraphicsContext()
 {
     SetNativeContext(NULL);
 }
 
-void wxMacCoreGraphicsContext::GetSize( wxDouble* width, wxDouble* height)
+
+void wxMacCoreGraphicsContext::CheckInvariants() const
 {
-    *width = m_width;
-    *height = m_height;
+    // check invariants here for debugging ...
 }
 
 
+
 void wxMacCoreGraphicsContext::StartPage( wxDouble width, wxDouble height )
 {
     CGRect r;
@@ -1593,16 +1672,18 @@ void wxMacCoreGraphicsContext::Flush()
 
 bool wxMacCoreGraphicsContext::EnsureIsValid()
 {
+    CheckInvariants();
+    
     if ( !m_cgContext )
     {
         if (m_invisible)
             return false;
-            
+
 #if wxOSX_USE_COCOA
         if ( wxOSXLockFocus(m_view) )
         {
             m_cgContext = wxOSXGetContextFromCurrentContext();
-            wxASSERT_MSG( m_cgContext != NULL, _T("Unable to retrieve drawing context from View"));
+            wxASSERT_MSG( m_cgContext != NULL, wxT("Unable to retrieve drawing context from View"));
         }
         else
         {
@@ -1625,16 +1706,11 @@ bool wxMacCoreGraphicsContext::EnsureIsValid()
 #endif
         if ( m_cgContext )
         {
-            CGContextConcatCTM( m_cgContext, m_windowTransform );
             CGContextSaveGState( m_cgContext );
-            m_contextSynthesized = true;
 #if wxOSX_USE_COCOA_OR_CARBON
             if ( m_clipRgn.get() )
             {
-                // 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))
                 {
@@ -1648,8 +1724,11 @@ bool wxMacCoreGraphicsContext::EnsureIsValid()
                 }
             }
 #endif
+            CGContextConcatCTM( m_cgContext, m_windowTransform );
+            CGContextSetTextMatrix( m_cgContext, CGAffineTransformIdentity );
+            m_contextSynthesized = true;
             CGContextSaveGState( m_cgContext );
-            
+
 #if 0 // turn on for debugging of clientdc
             static float color = 0.5 ;
             static int channel = 0 ;
@@ -1668,19 +1747,21 @@ bool wxMacCoreGraphicsContext::EnsureIsValid()
 #endif
         }
     }
+    CheckInvariants();
+
     return m_cgContext != NULL;
 }
 
 bool wxMacCoreGraphicsContext::SetAntialiasMode(wxAntialiasMode antialias)
 {
-    if (EnsureIsValid()==false)
+    if (!EnsureIsValid())
         return true;
 
     if (m_antialias == antialias)
         return true;
-    
+
     m_antialias = antialias;
-    
+
     bool antialiasMode;
     switch (antialias)
     {
@@ -1694,67 +1775,106 @@ bool wxMacCoreGraphicsContext::SetAntialiasMode(wxAntialiasMode antialias)
             return false;
     }
     CGContextSetShouldAntialias(m_cgContext, antialiasMode);
+    CheckInvariants();
+    return true;
+}
+
+bool wxMacCoreGraphicsContext::SetInterpolationQuality(wxInterpolationQuality interpolation)
+{
+    if (!EnsureIsValid())
+        return true;
+    
+    if (m_interpolation == interpolation)
+        return true;
+
+    m_interpolation = interpolation;
+    CGInterpolationQuality quality;
+    
+    switch (interpolation) 
+    {
+        case wxINTERPOLATION_DEFAULT:
+            quality = kCGInterpolationDefault;
+            break;
+        case wxINTERPOLATION_NONE:
+            quality = kCGInterpolationNone;
+            break;
+        case wxINTERPOLATION_FAST:
+            quality = kCGInterpolationLow;
+            break;
+        case wxINTERPOLATION_GOOD:
+#if wxOSX_USE_COCOA_OR_CARBON
+            quality = UMAGetSystemVersion() < 0x1060 ? kCGInterpolationHigh : (CGInterpolationQuality) 4 /*kCGInterpolationMedium only on 10.6*/;
+#else
+            quality = kCGInterpolationMedium;
+#endif
+            break;
+        case wxINTERPOLATION_BEST:
+            quality = kCGInterpolationHigh;
+            break;
+        default:
+            return false;
+    }
+    CGContextSetInterpolationQuality(m_cgContext, quality);
+    CheckInvariants();
     return true;
 }
 
 bool wxMacCoreGraphicsContext::SetCompositionMode(wxCompositionMode op)
 {
-    if (EnsureIsValid()==false)
+    if (!EnsureIsValid())
         return true;
 
     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 )
+
+    // TODO REMOVE if we don't need it because of bugs in 10.5
+#if 0
     {
         CGCompositeOperation cop = kCGCompositeOperationSourceOver;
         CGBlendMode mode = kCGBlendModeNormal;
         switch( op )
         {
         case wxCOMPOSITION_CLEAR:
-            cop = kCGCompositeOperationClear; 
+            cop = kCGCompositeOperationClear;
             break;
         case wxCOMPOSITION_SOURCE:
-            cop = kCGCompositeOperationCopy; 
+            cop = kCGCompositeOperationCopy;
             break;
         case wxCOMPOSITION_OVER:
-            mode = kCGBlendModeNormal; 
+            mode = kCGBlendModeNormal;
             break;
         case wxCOMPOSITION_IN:
-            cop = kCGCompositeOperationSourceIn; 
+            cop = kCGCompositeOperationSourceIn;
             break;
         case wxCOMPOSITION_OUT:
-            cop = kCGCompositeOperationSourceOut; 
+            cop = kCGCompositeOperationSourceOut;
             break;
         case wxCOMPOSITION_ATOP:
-            cop = kCGCompositeOperationSourceAtop; 
+            cop = kCGCompositeOperationSourceAtop;
             break;
         case wxCOMPOSITION_DEST_OVER:
-            cop = kCGCompositeOperationDestinationOver; 
+            cop = kCGCompositeOperationDestinationOver;
             break;
         case wxCOMPOSITION_DEST_IN:
-            cop = kCGCompositeOperationDestinationIn; 
+            cop = kCGCompositeOperationDestinationIn;
             break;
         case wxCOMPOSITION_DEST_OUT:
-            cop = kCGCompositeOperationDestinationOut; 
+            cop = kCGCompositeOperationDestinationOut;
             break;
         case wxCOMPOSITION_DEST_ATOP:
-           cop = kCGCompositeOperationDestinationAtop; 
+           cop = kCGCompositeOperationDestinationAtop;
             break;
         case wxCOMPOSITION_XOR:
-            cop = kCGCompositeOperationXOR; 
+            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;
         }
@@ -1764,46 +1884,44 @@ bool wxMacCoreGraphicsContext::SetCompositionMode(wxCompositionMode op)
             CGContextSetBlendMode(m_cgContext, mode);
     }
 #endif
-#if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_5
-    else
     {
         CGBlendMode mode = kCGBlendModeNormal;
         switch( op )
         {
         case wxCOMPOSITION_CLEAR:
-            mode = kCGBlendModeClear; 
+            mode = kCGBlendModeClear;
             break;
         case wxCOMPOSITION_SOURCE:
-            mode = kCGBlendModeCopy; 
+            mode = kCGBlendModeCopy;
             break;
         case wxCOMPOSITION_OVER:
-            mode = kCGBlendModeNormal; 
+            mode = kCGBlendModeNormal;
             break;
         case wxCOMPOSITION_IN:
-            mode = kCGBlendModeSourceIn; 
+            mode = kCGBlendModeSourceIn;
             break;
         case wxCOMPOSITION_OUT:
-            mode = kCGBlendModeSourceOut; 
+            mode = kCGBlendModeSourceOut;
             break;
         case wxCOMPOSITION_ATOP:
-            mode = kCGBlendModeSourceAtop; 
+            mode = kCGBlendModeSourceAtop;
             break;
         case wxCOMPOSITION_DEST_OVER:
-            mode = kCGBlendModeDestinationOver; 
+            mode = kCGBlendModeDestinationOver;
             break;
         case wxCOMPOSITION_DEST_IN:
-            mode = kCGBlendModeDestinationIn; 
+            mode = kCGBlendModeDestinationIn;
             break;
         case wxCOMPOSITION_DEST_OUT:
-            mode = kCGBlendModeDestinationOut; 
+            mode = kCGBlendModeDestinationOut;
             break;
         case wxCOMPOSITION_DEST_ATOP:
-           mode = kCGBlendModeDestinationAtop; 
+           mode = kCGBlendModeDestinationAtop;
             break;
         case wxCOMPOSITION_XOR:
-            mode = kCGBlendModeXOR; 
+            mode = kCGBlendModeExclusion; // Not kCGBlendModeXOR!
             break;
-            
+
         case wxCOMPOSITION_ADD:
             mode = kCGBlendModePlusLighter ;
             break;
@@ -1812,25 +1930,31 @@ bool wxMacCoreGraphicsContext::SetCompositionMode(wxCompositionMode op)
         }
         CGContextSetBlendMode(m_cgContext, mode);
     }
-#endif
+
+    CheckInvariants();
     return true;
 }
 
 void wxMacCoreGraphicsContext::BeginLayer(wxDouble opacity)
 {
+    CheckInvariants();
     CGContextSaveGState(m_cgContext);
     CGContextSetAlpha(m_cgContext, (CGFloat) opacity);
     CGContextBeginTransparencyLayer(m_cgContext, 0);
+    CheckInvariants();
 }
 
 void wxMacCoreGraphicsContext::EndLayer()
 {
+    CheckInvariants();
     CGContextEndTransparencyLayer(m_cgContext);
     CGContextRestoreGState(m_cgContext);
+    CheckInvariants();
 }
 
 void wxMacCoreGraphicsContext::Clip( const wxRegion &region )
 {
+    CheckInvariants();
 #if wxOSX_USE_COCOA_OR_CARBON
     if( m_cgContext )
     {
@@ -1861,11 +1985,13 @@ void wxMacCoreGraphicsContext::Clip( const wxRegion &region )
     // allow usage as measuring context
     // wxASSERT_MSG( m_cgContext != NULL, "Needs a valid context for clipping" );
 #endif
+    CheckInvariants();    
 }
 
 // clips drawings to the rect
 void wxMacCoreGraphicsContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 {
+    CheckInvariants();
     CGRect r = CGRectMake( (CGFloat) x , (CGFloat) y , (CGFloat) w , (CGFloat) h );
     if ( m_cgContext )
     {
@@ -1877,12 +2003,14 @@ void wxMacCoreGraphicsContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDoubl
         // the clipping itself must be stored as device coordinates, otherwise
         // we cannot apply it back correctly
         r.origin= CGPointApplyAffineTransform( r.origin, m_windowTransform );
+        r.size= CGSizeApplyAffineTransform(r.size, m_windowTransform);
         m_clipRgn.reset(HIShapeCreateWithRect(&r));
 #else
     // allow usage as measuring context
     // wxFAIL_MSG( "Needs a valid context for clipping" );
 #endif
     }
+    CheckInvariants();    
 }
 
     // resets the clipping to original extent
@@ -1909,6 +2037,7 @@ void wxMacCoreGraphicsContext::ResetClip()
     // wxFAIL_MSG( "Needs a valid context for clipping" );
 #endif
     }
+    CheckInvariants();    
 }
 
 void wxMacCoreGraphicsContext::StrokePath( const wxGraphicsPath &path )
@@ -1916,9 +2045,9 @@ void wxMacCoreGraphicsContext::StrokePath( const wxGraphicsPath &path )
     if ( m_pen.IsNull() )
         return ;
 
-    if (EnsureIsValid()==false)
+    if (!EnsureIsValid())
         return;
-        
+
     if (m_composition == wxCOMPOSITION_DEST)
         return;
 
@@ -1927,13 +2056,15 @@ void wxMacCoreGraphicsContext::StrokePath( const wxGraphicsPath &path )
     ((wxMacCoreGraphicsPenData*)m_pen.GetRefData())->Apply(this);
     CGContextAddPath( m_cgContext , (CGPathRef) path.GetNativePath() );
     CGContextStrokePath( m_cgContext );
+    
+    CheckInvariants();
 }
 
 void wxMacCoreGraphicsContext::DrawPath( const wxGraphicsPath &path , wxPolygonFillMode fillStyle )
 {
-    if (EnsureIsValid()==false)
+    if (!EnsureIsValid())
         return;
-        
+
     if (m_composition == wxCOMPOSITION_DEST)
         return;
 
@@ -1980,6 +2111,8 @@ void wxMacCoreGraphicsContext::DrawPath( const wxGraphicsPath &path , wxPolygonF
 
     CGContextAddPath( m_cgContext , (CGPathRef) path.GetNativePath() );
     CGContextDrawPath( m_cgContext , mode );
+    
+    CheckInvariants();
 }
 
 void wxMacCoreGraphicsContext::FillPath( const wxGraphicsPath &path , wxPolygonFillMode fillStyle )
@@ -1987,9 +2120,9 @@ void wxMacCoreGraphicsContext::FillPath( const wxGraphicsPath &path , wxPolygonF
     if ( m_brush.IsNull() )
         return;
 
-    if (EnsureIsValid()==false)
+    if (!EnsureIsValid())
         return;
-        
+
     if (m_composition == wxCOMPOSITION_DEST)
         return;
 
@@ -2010,6 +2143,8 @@ void wxMacCoreGraphicsContext::FillPath( const wxGraphicsPath &path , wxPolygonF
         else
             CGContextFillPath( m_cgContext );
     }
+    
+    CheckInvariants();
 }
 
 void wxMacCoreGraphicsContext::SetNativeContext( CGContextRef cg )
@@ -2019,13 +2154,11 @@ void wxMacCoreGraphicsContext::SetNativeContext( CGContextRef cg )
 
     if ( m_cgContext )
     {
+        CheckInvariants();
         CGContextRestoreGState( m_cgContext );
         CGContextRestoreGState( m_cgContext );
         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);
 #endif
@@ -2088,19 +2221,19 @@ void wxMacCoreGraphicsContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDo
 
 void wxMacCoreGraphicsContext::DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 {
-    if (EnsureIsValid()==false)
+    if (!EnsureIsValid())
         return;
 
     if (m_composition == wxCOMPOSITION_DEST)
         return;
-        
+
 #ifdef __WXMAC__
-    wxMacCoreGraphicsBitmapData* refdata  =static_cast<wxMacCoreGraphicsBitmapData*>(bmp.GetRefData());
+    wxMacCoreGraphicsBitmapData* refdata = static_cast<wxMacCoreGraphicsBitmapData*>(bmp.GetRefData());
     CGImageRef image = refdata->GetBitmap();
     CGRect r = CGRectMake( (CGFloat) x , (CGFloat) y , (CGFloat) w , (CGFloat) h );
     if ( refdata->IsMonochrome() == 1 )
     {
-        // is is a mask, the '1' in the mask tell where to draw the current brush
+        // is a mask, the '1' in the mask tell where to draw the current brush
         if (  !m_brush.IsNull() )
         {
             if ( ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
@@ -2126,40 +2259,44 @@ void wxMacCoreGraphicsContext::DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble
         wxMacDrawCGImage( m_cgContext , &r , image );
     }
 #endif
+    
+    CheckInvariants();
 }
 
 void wxMacCoreGraphicsContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
 {
-    if (EnsureIsValid()==false)
+    if (!EnsureIsValid())
         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 );
 #if wxOSX_USE_COCOA_OR_CARBON
+    CGRect r = CGRectMake( (CGFloat) 0.0 , (CGFloat) 0.0 , (CGFloat) w , (CGFloat) h );
     PlotIconRefInContext( m_cgContext , &r , kAlignNone , kTransformNone ,
         NULL , kPlotIconRefNormalFlags , icon.GetHICON() );
 #endif
     CGContextRestoreGState( m_cgContext );
+    
+    CheckInvariants();
 }
 
 void wxMacCoreGraphicsContext::PushState()
 {
-    if (EnsureIsValid()==false)
+    if (!EnsureIsValid())
         return;
-        
+
     CGContextSaveGState( m_cgContext );
 }
 
 void wxMacCoreGraphicsContext::PopState()
 {
-    if (EnsureIsValid()==false)
+    if (!EnsureIsValid())
         return;
-        
+
     CGContextRestoreGState( m_cgContext );
 }
 
@@ -2167,23 +2304,28 @@ void wxMacCoreGraphicsContext::DoDrawText( const wxString &str, wxDouble x, wxDo
 {
     wxCHECK_RET( !m_font.IsNull(), wxT("wxMacCoreGraphicsContext::DrawText - no valid font set") );
 
-    if (EnsureIsValid()==false)
+    if (!EnsureIsValid())
         return;
-        
+
     if (m_composition == wxCOMPOSITION_DEST)
         return;
 
 #if wxOSX_USE_CORE_TEXT
-    if ( UMAGetSystemVersion() >= 0x1050 )
     {
         wxMacCoreGraphicsFontData* fref = (wxMacCoreGraphicsFontData*)m_font.GetRefData();
         wxCFStringRef text(str, wxLocale::GetSystemEncoding() );
         CTFontRef font = fref->OSXGetCTFont();
         CGColorRef col = wxMacCreateCGColor( fref->GetColour() );
+#if 0
+        // right now there's no way to get continuous underlines, only words, so we emulate it
         CTUnderlineStyle ustyle = fref->GetUnderlined() ? kCTUnderlineStyleSingle : kCTUnderlineStyleNone ;
         wxCFRef<CFNumberRef> underlined( CFNumberCreate(NULL, kCFNumberSInt32Type, &ustyle) );
          CFStringRef keys[] = { kCTFontAttributeName , kCTForegroundColorAttributeName, kCTUnderlineStyleAttributeName };
         CFTypeRef values[] = { font, col, underlined };
+#else
+        CFStringRef keys[] = { kCTFontAttributeName , kCTForegroundColorAttributeName };
+        CFTypeRef values[] = { font, col };
+#endif
         wxCFRef<CFDictionaryRef> attributes( CFDictionaryCreate(kCFAllocatorDefault, (const void**) &keys, (const void**) &values,
                                                         WXSIZEOF( keys ), &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks) );
         wxCFRef<CFAttributedStringRef> attrtext( CFAttributedStringCreate(kCFAllocatorDefault, text, attributes) );
@@ -2192,12 +2334,30 @@ void wxMacCoreGraphicsContext::DoDrawText( const wxString &str, wxDouble x, wxDo
         y += CTFontGetAscent(font);
 
         CGContextSaveGState(m_cgContext);
+        CGAffineTransform textMatrix = CGContextGetTextMatrix(m_cgContext);
+        
         CGContextTranslateCTM(m_cgContext, (CGFloat) x, (CGFloat) y);
         CGContextScaleCTM(m_cgContext, 1, -1);
-        CGContextSetTextPosition(m_cgContext, 0, 0);
+        CGContextSetTextMatrix(m_cgContext, CGAffineTransformIdentity);
+        
         CTLineDraw( line, m_cgContext );
+        
+        if ( fref->GetUnderlined() ) {
+            //AKT: draw horizontal line 1 pixel thick and with 1 pixel gap under baseline
+            CGFloat width = CTLineGetTypographicBounds(line, NULL, NULL, NULL);
+
+            CGPoint points[] = { {0.0, -2.0},  {width, -2.0} };
+            
+            CGContextSetStrokeColorWithColor(m_cgContext, col);
+            CGContextSetShouldAntialias(m_cgContext, false);
+            CGContextSetLineWidth(m_cgContext, 1.0);
+            CGContextStrokeLineSegments(m_cgContext, points, 2);
+        }
+        
         CGContextRestoreGState(m_cgContext);
-        CFRelease( col );
+        CGContextSetTextMatrix(m_cgContext, textMatrix);
+        CGColorRelease( col );
+        CheckInvariants();
         return;
     }
 #endif
@@ -2222,6 +2382,8 @@ void wxMacCoreGraphicsContext::DoDrawText( const wxString &str, wxDouble x, wxDo
     CGContextRestoreGState(m_cgContext);
     CFRelease( col );
 #endif
+    
+    CheckInvariants();
 }
 
 void wxMacCoreGraphicsContext::DoDrawRotatedText(const wxString &str,
@@ -2230,14 +2392,13 @@ void wxMacCoreGraphicsContext::DoDrawRotatedText(const wxString &str,
 {
     wxCHECK_RET( !m_font.IsNull(), wxT("wxMacCoreGraphicsContext::DrawText - no valid font set") );
 
-    if (EnsureIsValid()==false)
+    if (!EnsureIsValid())
         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
         wxGraphicsContext::DoDrawRotatedText( str, x, y, angle );
@@ -2268,15 +2429,15 @@ void wxMacCoreGraphicsContext::DoDrawRotatedText(const wxString &str,
             {
                 kATSULineRotationTag ,
             };
-            ByteCount atsuSizes[sizeof(atsuTags) / sizeof(ATSUAttributeTag)] =
+            ByteCount atsuSizes[WXSIZEOF(atsuTags)] =
             {
                 sizeof( Fixed ) ,
             };
-            ATSUAttributeValuePtr    atsuValues[sizeof(atsuTags) / sizeof(ATSUAttributeTag)] =
+            ATSUAttributeValuePtr    atsuValues[WXSIZEOF(atsuTags)] =
             {
                 &atsuAngle ,
             };
-            status = ::ATSUSetLayoutControls(atsuLayout , sizeof(atsuTags) / sizeof(ATSUAttributeTag),
+            status = ::ATSUSetLayoutControls(atsuLayout , WXSIZEOF(atsuTags),
                                              atsuTags, atsuSizes, atsuValues );
         }
 
@@ -2285,15 +2446,15 @@ void wxMacCoreGraphicsContext::DoDrawRotatedText(const wxString &str,
             {
                 kATSUCGContextTag ,
             };
-            ByteCount atsuSizes[sizeof(atsuTags) / sizeof(ATSUAttributeTag)] =
+            ByteCount atsuSizes[WXSIZEOF(atsuTags)] =
             {
                 sizeof( CGContextRef ) ,
             };
-            ATSUAttributeValuePtr    atsuValues[sizeof(atsuTags) / sizeof(ATSUAttributeTag)] =
+            ATSUAttributeValuePtr    atsuValues[WXSIZEOF(atsuTags)] =
             {
                 &m_cgContext ,
             };
-            status = ::ATSUSetLayoutControls(atsuLayout , sizeof(atsuTags) / sizeof(ATSUAttributeTag),
+            status = ::ATSUSetLayoutControls(atsuLayout , WXSIZEOF(atsuTags),
                                              atsuTags, atsuSizes, atsuValues );
         }
 
@@ -2306,8 +2467,8 @@ void wxMacCoreGraphicsContext::DoDrawRotatedText(const wxString &str,
         wxASSERT_MSG( status == noErr , wxT("couldn't measure the rotated text") );
 
         Rect rect;
-        x += (int)(sin(angle) * FixedToInt(ascent));
-        y += (int)(cos(angle) * FixedToInt(ascent));
+        x += (int)(sin(angle) * FixedToFloat(ascent));
+        y += (int)(cos(angle) * FixedToFloat(ascent));
 
         status = ::ATSUMeasureTextImage( atsuLayout, kATSUFromTextBeginning, kATSUToTextEnd,
                                         IntToFixed(x) , IntToFixed(y) , &rect );
@@ -2324,6 +2485,7 @@ void wxMacCoreGraphicsContext::DoDrawRotatedText(const wxString &str,
         CGContextRestoreGState(m_cgContext);
 
         ::ATSUDisposeTextLayout(atsuLayout);
+        CheckInvariants();
 
         return;
     }
@@ -2332,6 +2494,8 @@ void wxMacCoreGraphicsContext::DoDrawRotatedText(const wxString &str,
     // default implementation takes care of rotation and calls non rotated DrawText afterwards
     wxGraphicsContext::DoDrawRotatedText( str, x, y, angle );
 #endif
+    
+    CheckInvariants();
 }
 
 void wxMacCoreGraphicsContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
@@ -2352,7 +2516,6 @@ void wxMacCoreGraphicsContext::GetTextExtent( const wxString &str, wxDouble *wid
         return;
 
 #if wxOSX_USE_CORE_TEXT
-    if ( UMAGetSystemVersion() >= 0x1050 )
     {
         wxMacCoreGraphicsFontData* fref = (wxMacCoreGraphicsFontData*)m_font.GetRefData();
         CTFontRef font = fref->OSXGetCTFont();
@@ -2365,10 +2528,8 @@ void wxMacCoreGraphicsContext::GetTextExtent( const wxString &str, wxDouble *wid
         wxCFRef<CFAttributedStringRef> attrtext( CFAttributedStringCreate(kCFAllocatorDefault, text, attributes) );
         wxCFRef<CTLineRef> line( CTLineCreateWithAttributedString(attrtext) );
 
-        double w;
-        CGFloat a, d, l;
-
-        w = CTLineGetTypographicBounds(line, &a, &d, &l) ;
+        CGFloat a, d, l, w;
+        w = CTLineGetTypographicBounds(line, &a, &d, &l);
 
         if ( height )
             *height = a+d+l;
@@ -2405,13 +2566,13 @@ void wxMacCoreGraphicsContext::GetTextExtent( const wxString &str, wxDouble *wid
                                             &textBefore , &textAfter, &textAscent , &textDescent );
 
         if ( height )
-            *height = FixedToInt(textAscent + textDescent);
+            *height = FixedToFloat(textAscent + textDescent);
         if ( descent )
-            *descent = FixedToInt(textDescent);
+            *descent = FixedToFloat(textDescent);
         if ( externalLeading )
             *externalLeading = 0;
         if ( width )
-            *width = FixedToInt(textAfter - textBefore);
+            *width = FixedToFloat(textAfter - textBefore);
 
         ::ATSUDisposeTextLayout(atsuLayout);
 
@@ -2428,13 +2589,15 @@ void wxMacCoreGraphicsContext::GetTextExtent( const wxString &str, wxDouble *wid
         *height = sz.height;
         /*
     if ( descent )
-        *descent = FixedToInt(textDescent);
+        *descent = FixedToFloat(textDescent);
     if ( externalLeading )
         *externalLeading = 0;
         */
     if ( width )
         *width = sz.width;
 #endif
+    
+    CheckInvariants();    
 }
 
 void wxMacCoreGraphicsContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
@@ -2463,7 +2626,7 @@ void wxMacCoreGraphicsContext::GetPartialTextExtents(const wxString& text, wxArr
         int chars = text.length();
         for ( int pos = 0; pos < (int)chars; pos ++ )
         {
-            widths[pos] = CTLineGetOffsetForStringIndex( line, pos+1 , NULL )+0.5;
+            widths[pos] = CTLineGetOffsetForStringIndex( line, pos+1 , NULL );
         }
 
         return;
@@ -2499,7 +2662,7 @@ void wxMacCoreGraphicsContext::GetPartialTextExtents(const wxString& text, wxArr
             if (result != noErr || actualNumberOfBounds != 1 )
                 return;
 
-            widths[pos] = FixedToInt( glyphBounds.upperRight.x - glyphBounds.upperLeft.x );
+            widths[pos] = FixedToFloat( glyphBounds.upperRight.x - glyphBounds.upperLeft.x );
             //unsigned char uch = s[i];
         }
 #else
@@ -2519,7 +2682,7 @@ void wxMacCoreGraphicsContext::GetPartialTextExtents(const wxString& text, wxArr
         {
             for ( int pos = 1; pos < (int)glyphCount ; pos ++ )
             {
-                widths[pos-1] = FixedToInt( layoutRecords[pos].realPos );
+                widths[pos-1] = FixedToFloat( layoutRecords[pos].realPos );
             }
         }
 
@@ -2533,6 +2696,8 @@ void wxMacCoreGraphicsContext::GetPartialTextExtents(const wxString& text, wxArr
 #if wxOSX_USE_IPHONE
     // TODO core graphics text implementation here
 #endif
+    
+    CheckInvariants();
 }
 
 void * wxMacCoreGraphicsContext::GetNativeContext()
@@ -2540,18 +2705,50 @@ void * wxMacCoreGraphicsContext::GetNativeContext()
     return m_cgContext;
 }
 
+
+void wxMacCoreGraphicsContext::DrawRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
+{
+    if (!EnsureIsValid())
+        return;
+
+    if (m_composition == wxCOMPOSITION_DEST) 
+        return; 
+
+    // when using shading, we have to go back to drawing paths 
+    if ( !m_brush.IsNull() && ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->IsShading() )
+    {
+        wxGraphicsContext::DrawRectangle( x,y,w,h );
+        return;
+    }
+
+    CGRect rect = CGRectMake( (CGFloat) x , (CGFloat) y , (CGFloat) w , (CGFloat) h );
+    if ( !m_brush.IsNull() )
+    {
+        ((wxMacCoreGraphicsBrushData*)m_brush.GetRefData())->Apply(this);
+        CGContextFillRect(m_cgContext, rect);
+    }
+    
+    wxQuartzOffsetHelper helper( m_cgContext , ShouldOffset() );
+    if ( !m_pen.IsNull() )
+    {
+        ((wxMacCoreGraphicsPenData*)m_pen.GetRefData())->Apply(this);
+        CGContextStrokeRect(m_cgContext, rect);
+    }
+}
+
 // concatenates this transform with the current transform of this context
 void wxMacCoreGraphicsContext::ConcatTransform( const wxGraphicsMatrix& matrix )
 {
     if ( m_cgContext )
         CGContextConcatCTM( m_cgContext, *(CGAffineTransform*) matrix.GetNativeMatrix());
     else
-        m_windowTransform = CGAffineTransformConcat(m_windowTransform, *(CGAffineTransform*) matrix.GetNativeMatrix());
+        m_windowTransform = CGAffineTransformConcat(*(CGAffineTransform*) matrix.GetNativeMatrix(), m_windowTransform);
 }
 
 // sets the transform of this context
 void wxMacCoreGraphicsContext::SetTransform( const wxGraphicsMatrix& matrix )
 {
+    CheckInvariants();
     if ( m_cgContext )
     {
         CGAffineTransform transform = CGContextGetCTM( m_cgContext );
@@ -2563,6 +2760,7 @@ void wxMacCoreGraphicsContext::SetTransform( const wxGraphicsMatrix& matrix )
     {
         m_windowTransform = *(CGAffineTransform*) matrix.GetNativeMatrix();
     }
+    CheckInvariants();
 }
 
 // gets the matrix of this context
@@ -2574,6 +2772,49 @@ wxGraphicsMatrix wxMacCoreGraphicsContext::GetTransform() const
     return m;
 }
 
+
+#if wxUSE_IMAGE
+
+// ----------------------------------------------------------------------------
+// wxMacCoreGraphicsImageContext
+// ----------------------------------------------------------------------------
+
+// This is a GC that can be used to draw on wxImage. In this implementation we
+// simply draw on a wxBitmap using wxMemoryDC and then convert it to wxImage in
+// the end so it's not especially interesting and exists mainly for
+// compatibility with the other platforms.
+class wxMacCoreGraphicsImageContext : public wxMacCoreGraphicsContext
+{
+public:
+    wxMacCoreGraphicsImageContext(wxGraphicsRenderer* renderer,
+                                  wxImage& image) :
+        wxMacCoreGraphicsContext(renderer),
+        m_image(image),
+        m_bitmap(image),
+        m_memDC(m_bitmap)
+    {
+        SetNativeContext
+        (
+            (CGContextRef)(m_memDC.GetGraphicsContext()->GetNativeContext())
+        );
+        m_width = image.GetWidth();
+        m_height = image.GetHeight();
+    }
+
+    virtual ~wxMacCoreGraphicsImageContext()
+    {
+        m_memDC.SelectObject(wxNullBitmap);
+        m_image = m_bitmap.ConvertToImage();
+    }
+
+private:
+    wxImage& m_image;
+    wxBitmap m_bitmap;
+    wxMemoryDC m_memDC;
+};
+
+#endif // wxUSE_IMAGE
+
 //
 // Renderer
 //
@@ -2603,6 +2844,10 @@ public :
 
     virtual wxGraphicsContext * CreateContext( wxWindow* window );
 
+#if wxUSE_IMAGE
+    virtual wxGraphicsContext * CreateContextFromImage(wxImage& image);
+#endif // wxUSE_IMAGE
+
     virtual wxGraphicsContext * CreateMeasuringContext();
 
     // Path
@@ -2619,21 +2864,35 @@ public :
 
     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) ;
 
-    // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
-    virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
-        const wxColour&c1, const wxColour&c2) ;
+    virtual wxGraphicsBrush
+    CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
+                              wxDouble x2, wxDouble y2,
+                              const wxGraphicsGradientStops& stops);
 
-    // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
-    // with radius r and color cColor
-    virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
-        const wxColour &oColor, const wxColour &cColor) ;
+    virtual wxGraphicsBrush
+    CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
+                              wxDouble xc, wxDouble yc,
+                              wxDouble radius,
+                              const wxGraphicsGradientStops& stops);
 
    // sets the font
     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ;
+    virtual wxGraphicsFont CreateFont(double sizeInPixels,
+                                      const wxString& facename,
+                                      int flags = wxFONTFLAG_DEFAULT,
+                                      const wxColour& col = *wxBLACK);
 
     // create a native bitmap representation
     virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap ) ;
 
+#if wxUSE_IMAGE
+    virtual wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image);
+    virtual wxImage CreateImageFromBitmap(const wxGraphicsBitmap& bmp);
+#endif // wxUSE_IMAGE
+
+    // create a graphics bitmap from a native bitmap
+    virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
+
     // create a native bitmap representation
     virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h  ) ;
 private :
@@ -2667,8 +2926,12 @@ wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContext( const wxWindowDC&
         if (win_impl->GetWindow())
             cgctx =  (CGContextRef)(win_impl->GetWindow()->MacGetCGContextRef());
 
-        if (cgctx != 0)
-            return new wxMacCoreGraphicsContext( this, cgctx, (wxDouble) w, (wxDouble) h );
+        // having a cgctx being NULL is fine (will be created on demand)
+        // this is the case for all wxWindowDCs except wxPaintDC
+        wxMacCoreGraphicsContext *context = 
+            new wxMacCoreGraphicsContext( this, cgctx, (wxDouble) w, (wxDouble) h );
+        context->EnableOffset(true);
+        return context;
     }
     return NULL;
 }
@@ -2682,8 +2945,10 @@ wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContext( const wxMemoryDC&
     {
         int w, h;
         mem_impl->GetSize( &w, &h );
-        return new wxMacCoreGraphicsContext( this,
+        wxMacCoreGraphicsContext* context = new wxMacCoreGraphicsContext( this,
             (CGContextRef)(mem_impl->GetGraphicsContext()->GetNativeContext()), (wxDouble) w, (wxDouble) h );
+        context->EnableOffset(true);
+        return context;
     }
 #endif
     return NULL;
@@ -2715,7 +2980,9 @@ wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContextFromNativeContext( v
 wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateContextFromNativeWindow( void * window )
 {
 #if wxOSX_USE_CARBON
-    return new wxMacCoreGraphicsContext(this,(WindowRef)window);
+    wxMacCoreGraphicsContext* context = new wxMacCoreGraphicsContext(this,(WindowRef)window);
+    context->EnableOffset(true);
+    return context;
 #else
     wxUnusedVar(window);
     return NULL;
@@ -2732,6 +2999,16 @@ wxGraphicsContext * wxMacCoreGraphicsRenderer::CreateMeasuringContext()
     return new wxMacCoreGraphicsContext(this);
 }
 
+#if wxUSE_IMAGE
+
+wxGraphicsContext*
+wxMacCoreGraphicsRenderer::CreateContextFromImage(wxImage& image)
+{
+    return new wxMacCoreGraphicsImageContext(this, image);
+}
+
+#endif // wxUSE_IMAGE
+
 // Path
 
 wxGraphicsPath wxMacCoreGraphicsRenderer::CreatePath()
@@ -2756,7 +3033,7 @@ wxGraphicsMatrix wxMacCoreGraphicsRenderer::CreateMatrix( wxDouble a, wxDouble b
 
 wxGraphicsPen wxMacCoreGraphicsRenderer::CreatePen(const wxPen& pen)
 {
-    if ( !pen.Ok() || pen.GetStyle() == wxTRANSPARENT )
+    if ( !pen.IsOk() || pen.GetStyle() == wxTRANSPARENT )
         return wxNullGraphicsPen;
     else
     {
@@ -2768,7 +3045,7 @@ wxGraphicsPen wxMacCoreGraphicsRenderer::CreatePen(const wxPen& pen)
 
 wxGraphicsBrush wxMacCoreGraphicsRenderer::CreateBrush(const wxBrush& brush )
 {
-    if ( !brush.Ok() || brush.GetStyle() == wxTRANSPARENT )
+    if ( !brush.IsOk() || brush.GetStyle() == wxTRANSPARENT )
         return wxNullGraphicsBrush;
     else
     {
@@ -2780,12 +3057,44 @@ wxGraphicsBrush wxMacCoreGraphicsRenderer::CreateBrush(const wxBrush& brush )
 
 wxGraphicsBitmap wxMacCoreGraphicsRenderer::CreateBitmap( const wxBitmap& bmp )
 {
-    if ( bmp.Ok() )
+    if ( bmp.IsOk() )
     {
         wxGraphicsBitmap p;
-#ifdef __WXMAC__
         p.SetRefData(new wxMacCoreGraphicsBitmapData( this , bmp.CreateCGImage(), bmp.GetDepth() == 1 ) );
-#endif
+        return p;
+    }
+    else
+        return wxNullGraphicsBitmap;
+}
+
+#if wxUSE_IMAGE
+
+wxGraphicsBitmap
+wxMacCoreGraphicsRenderer::CreateBitmapFromImage(const wxImage& image)
+{
+    // We don't have any direct way to convert wxImage to CGImage so pass by
+    // wxBitmap. This makes this function pretty useless in this implementation
+    // but it allows to have the same API as with Cairo backend where we can
+    // convert wxImage to a Cairo surface directly, bypassing wxBitmap.
+    return CreateBitmap(wxBitmap(image));
+}
+
+wxImage wxMacCoreGraphicsRenderer::CreateImageFromBitmap(const wxGraphicsBitmap& bmp)
+{
+    wxMacCoreGraphicsBitmapData* const
+        data = static_cast<wxMacCoreGraphicsBitmapData*>(bmp.GetRefData());
+
+    return data ? data->ConvertToImage() : wxNullImage;
+}
+
+#endif // wxUSE_IMAGE
+
+wxGraphicsBitmap wxMacCoreGraphicsRenderer::CreateBitmapFromNativeBitmap( void* bitmap )
+{
+    if ( bitmap != NULL )
+    {
+        wxGraphicsBitmap p;
+        p.SetRefData(new wxMacCoreGraphicsBitmapData( this , (CGImageRef) bitmap, false ));
         return p;
     }
     else
@@ -2807,33 +3116,34 @@ wxGraphicsBitmap wxMacCoreGraphicsRenderer::CreateSubBitmap( const wxGraphicsBit
         return wxNullGraphicsBitmap;
 }
 
-// sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
-wxGraphicsBrush wxMacCoreGraphicsRenderer::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
-    const wxColour&c1, const wxColour&c2)
+wxGraphicsBrush
+wxMacCoreGraphicsRenderer::CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
+                                                     wxDouble x2, wxDouble y2,
+                                                     const wxGraphicsGradientStops& stops)
 {
     wxGraphicsBrush p;
     wxMacCoreGraphicsBrushData* d = new wxMacCoreGraphicsBrushData( this );
-    d->CreateLinearGradientBrush(x1, y1, x2, y2, c1, c2);
+    d->CreateLinearGradientBrush(x1, y1, x2, y2, stops);
     p.SetRefData(d);
     return p;
 }
 
-// sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
-// with radius r and color cColor
-wxGraphicsBrush wxMacCoreGraphicsRenderer::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
-    const wxColour &oColor, const wxColour &cColor)
+wxGraphicsBrush
+wxMacCoreGraphicsRenderer::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
+                                                     wxDouble xc, wxDouble yc,
+                                                     wxDouble radius,
+                                                     const wxGraphicsGradientStops& stops)
 {
     wxGraphicsBrush p;
     wxMacCoreGraphicsBrushData* d = new wxMacCoreGraphicsBrushData( this );
-    d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,oColor,cColor);
+    d->CreateRadialGradientBrush(xo, yo, xc, yc, radius, stops);
     p.SetRefData(d);
     return p;
 }
 
-// sets the font
 wxGraphicsFont wxMacCoreGraphicsRenderer::CreateFont( const wxFont &font , const wxColour &col )
 {
-    if ( font.Ok() )
+    if ( font.IsOk() )
     {
         wxGraphicsFont p;
         p.SetRefData(new wxMacCoreGraphicsFontData( this , font, col ));
@@ -2843,6 +3153,32 @@ wxGraphicsFont wxMacCoreGraphicsRenderer::CreateFont( const wxFont &font , const
         return wxNullGraphicsFont;
 }
 
+wxGraphicsFont
+wxMacCoreGraphicsRenderer::CreateFont(double sizeInPixels,
+                                      const wxString& facename,
+                                      int flags,
+                                      const wxColour& col)
+{
+    // This implementation is not ideal as we don't support fractional font
+    // sizes right now, but it's the simplest one.
+    //
+    // Notice that under Mac we always use 72 DPI so the font size in pixels is
+    // the same as the font size in points and we can pass it directly to wxFont
+    // ctor.
+    wxFont font(wxRound(sizeInPixels),
+                wxFONTFAMILY_DEFAULT,
+                flags & wxFONTFLAG_ITALIC ? wxFONTSTYLE_ITALIC
+                                          : wxFONTSTYLE_NORMAL,
+                flags & wxFONTFLAG_BOLD ? wxFONTWEIGHT_BOLD
+                                        : wxFONTWEIGHT_NORMAL,
+                (flags & wxFONTFLAG_UNDERLINED) != 0,
+                facename);
+
+    wxGraphicsFont f;
+    f.SetRefData(new wxMacCoreGraphicsFontData(this, font, col));
+    return f;
+}
+
 //
 // CoreGraphics Helper Methods
 //