X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/401889f079da7619db7aa637fd8a25951bab625d..ccc040255c07064f2ed96f1a345d21860b202cb6:/src/msw/graphics.cpp

diff --git a/src/msw/graphics.cpp b/src/msw/graphics.cpp
index c1c7df147c..f447d1566e 100644
--- a/src/msw/graphics.cpp
+++ b/src/msw/graphics.cpp
@@ -78,6 +78,31 @@ inline Color wxColourToColor(const wxColour& col)
     return Color(col.Alpha(), col.Red(), col.Green(), col.Blue());
 }
 
+// Do not use this pointer directly, it's only used by
+// GetDrawTextStringFormat() and the cleanup code in wxGDIPlusRendererModule.
+StringFormat* gs_drawTextStringFormat = NULL;
+
+// Get the string format used for the text drawing and measuring functions:
+// notice that it must be the same one for all of them, otherwise the drawn
+// text might be of different size than what measuring it returned.
+inline StringFormat* GetDrawTextStringFormat()
+{
+    if ( !gs_drawTextStringFormat )
+    {
+        gs_drawTextStringFormat = new StringFormat(StringFormat::GenericTypographic());
+
+        // This doesn't make any difference for DrawText() actually but we want
+        // this behaviour when measuring text.
+        gs_drawTextStringFormat->SetFormatFlags
+        (
+            gs_drawTextStringFormat->GetFormatFlags()
+                | StringFormatFlagsMeasureTrailingSpaces
+        );
+    }
+
+    return gs_drawTextStringFormat;
+}
+
 } // anonymous namespace
 
 //-----------------------------------------------------------------------------
@@ -272,7 +297,7 @@ private:
     GraphicsPath* m_brushPath;
 };
 
-class WXDLLIMPEXP_CORE wxGDIPlusBitmapData : public wxGraphicsObjectRefData
+class WXDLLIMPEXP_CORE wxGDIPlusBitmapData : public wxGraphicsBitmapData
 {
 public:
     wxGDIPlusBitmapData( wxGraphicsRenderer* renderer, Bitmap* bitmap );
@@ -280,6 +305,11 @@ public:
     ~wxGDIPlusBitmapData ();
 
     virtual Bitmap* GetGDIPlusBitmap() { return m_bitmap; }
+    virtual void* GetNativeBitmap() const { return m_bitmap; }
+
+#if wxUSE_IMAGE
+    wxImage ConvertToImage() const;
+#endif // wxUSE_IMAGE
 
 private :
     Bitmap* m_bitmap;
@@ -290,14 +320,27 @@ class wxGDIPlusFontData : public wxGraphicsObjectRefData
 {
 public:
     wxGDIPlusFontData( wxGraphicsRenderer* renderer,
-                       const wxGDIPlusContext* gc,
                        const wxFont &font,
                        const wxColour& col );
+    wxGDIPlusFontData(wxGraphicsRenderer* renderer,
+                      const wxString& name,
+                      REAL sizeInPixels,
+                      int style,
+                      const wxColour& col);
     ~wxGDIPlusFontData();
 
     virtual Brush* GetGDIPlusBrush() { return m_textBrush; }
     virtual Font* GetGDIPlusFont() { return m_font; }
+
 private :
+    // Common part of all ctors, flags here is a combination of values of
+    // FontStyle GDI+ enum.
+    void Init(const wxString& name,
+              REAL size,
+              int style,
+              const wxColour& col,
+              Unit fontUnit);
+
     Brush* m_textBrush;
     Font* m_font;
 };
@@ -309,7 +352,7 @@ public:
     wxGDIPlusContext( wxGraphicsRenderer* renderer, HDC hdc, wxDouble width, wxDouble height );
     wxGDIPlusContext( wxGraphicsRenderer* renderer, HWND hwnd );
     wxGDIPlusContext( wxGraphicsRenderer* renderer, Graphics* gr);
-    wxGDIPlusContext();
+    wxGDIPlusContext(wxGraphicsRenderer* renderer);
 
     virtual ~wxGDIPlusContext();
 
@@ -330,6 +373,13 @@ public:
     // stroke lines connecting each of the points
     virtual void StrokeLines( size_t n, const wxPoint2DDouble *points);
 
+    // We don't have any specific implementation for this one in wxMSW but
+    // override it just to avoid warnings about hiding the base class virtual.
+    virtual void StrokeLines( size_t n, const wxPoint2DDouble *beginPoints, const wxPoint2DDouble *endPoints)
+    {
+        wxGraphicsContext::StrokeLines(n, beginPoints, endPoints);
+    }
+
     // draws a polygon
     virtual void DrawLines( size_t n, const wxPoint2DDouble *points, wxPolygonFillMode fillStyle = wxODDEVEN_RULE );
 
@@ -362,9 +412,6 @@ public:
     virtual void PushState();
     virtual void PopState();
 
-    // sets the font of this context
-    virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) const;
-
     virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
         wxDouble *descent, wxDouble *externalLeading ) const;
     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
@@ -377,30 +424,57 @@ protected:
 
     wxDouble m_fontScaleRatio;
 
-private:
-    void    Init();
-    void    SetDefaults();
+    // Used from ctors (including those in the derived classes) and takes
+    // ownership of the graphics pointer that must be non-NULL.
+    void Init(Graphics* graphics, int width, int height);
 
-    virtual void DoDrawText(const wxString& str, wxDouble x, wxDouble y)
-        { DoDrawFilledText(str, x, y, wxNullGraphicsBrush); }
-    virtual void DoDrawFilledText(const wxString& str, wxDouble x, wxDouble y,
-                                  const wxGraphicsBrush& backgroundBrush);
+private:
+    virtual void DoDrawText(const wxString& str, wxDouble x, wxDouble y);
 
     Graphics* m_context;
     wxStack<GraphicsState> m_stateStack;
     GraphicsState m_state1;
     GraphicsState m_state2;
 
-    DECLARE_DYNAMIC_CLASS_NO_COPY(wxGDIPlusContext)
+    wxDECLARE_NO_COPY_CLASS(wxGDIPlusContext);
 };
 
-class wxGDIPlusMeasuringContext : public wxGDIPlusContext
+#if wxUSE_IMAGE
+
+class wxGDIPlusImageContext : public wxGDIPlusContext
 {
 public:
-    wxGDIPlusMeasuringContext( wxGraphicsRenderer* renderer ) : wxGDIPlusContext( renderer , m_hdc = GetDC(NULL), 1000, 1000 )
+    wxGDIPlusImageContext(wxGraphicsRenderer* renderer, wxImage& image) :
+        wxGDIPlusContext(renderer),
+        m_image(image),
+        m_bitmap(renderer, image)
+    {
+        Init
+        (
+            new Graphics(m_bitmap.GetGDIPlusBitmap()),
+            image.GetWidth(),
+            image.GetHeight()
+        );
+    }
+
+    virtual ~wxGDIPlusImageContext()
     {
+        m_image = m_bitmap.ConvertToImage();
     }
-    wxGDIPlusMeasuringContext()
+
+private:
+    wxImage& m_image;
+    wxGDIPlusBitmapData m_bitmap;
+
+    wxDECLARE_NO_COPY_CLASS(wxGDIPlusImageContext);
+};
+
+#endif // wxUSE_IMAGE
+
+class wxGDIPlusMeasuringContext : public wxGDIPlusContext
+{
+public:
+    wxGDIPlusMeasuringContext( wxGraphicsRenderer* renderer ) : wxGDIPlusContext( renderer , m_hdc = GetDC(NULL), 1000, 1000 )
     {
     }
 
@@ -411,7 +485,6 @@ public:
 
 private:
     HDC m_hdc ;
-    DECLARE_DYNAMIC_CLASS_NO_COPY(wxGDIPlusMeasuringContext)
 } ;
 
 class wxGDIPlusPrintingContext : public wxGDIPlusContext
@@ -463,6 +536,10 @@ public :
 
     virtual wxGraphicsContext * CreateContext( wxWindow* window );
 
+#if wxUSE_IMAGE
+    virtual wxGraphicsContext * CreateContextFromImage(wxImage& image);
+#endif // wxUSE_IMAGE
+
     virtual wxGraphicsContext * CreateMeasuringContext();
 
     // Path
@@ -492,16 +569,18 @@ public :
 
     // 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
 
-    // stub: should not be called directly
-    virtual wxGraphicsFont CreateFont( const wxFont& WXUNUSED(font),
-                                       const wxColour& WXUNUSED(col) )
-        { wxFAIL; return wxNullGraphicsFont; }
+    virtual wxGraphicsFont CreateFont( const wxFont& font,
+                                       const wxColour& col);
 
-    // this is used to really create the font
-    wxGraphicsFont CreateGDIPlusFont( const wxGDIPlusContext* gc,
-                                      const wxFont &font,
-                                      const wxColour &col );
+    virtual wxGraphicsFont CreateFont(double size,
+                                      const wxString& facename,
+                                      int flags = wxFONTFLAG_DEFAULT,
+                                      const wxColour& col = *wxBLACK);
 
     // create a graphics bitmap from a native bitmap
     virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap );
@@ -843,13 +922,23 @@ wxGDIPlusBrushData::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 // wxGDIPlusFont implementation
 //-----------------------------------------------------------------------------
 
+void
+wxGDIPlusFontData::Init(const wxString& name,
+                        REAL size,
+                        int style,
+                        const wxColour& col,
+                        Unit fontUnit)
+{
+    m_font = new Font(name.wc_str(), size, style, fontUnit);
+
+    m_textBrush = new SolidBrush(wxColourToColor(col));
+}
+
 wxGDIPlusFontData::wxGDIPlusFontData( wxGraphicsRenderer* renderer,
-                                      const wxGDIPlusContext* gc,
                                       const wxFont &font,
                                       const wxColour& col )
     : wxGraphicsObjectRefData( renderer )
 {
-    wxWCharBuffer s = font.GetFaceName().wc_str( *wxConvUI );
     int style = FontStyleRegular;
     if ( font.GetStyle() == wxFONTSTYLE_ITALIC )
         style |= FontStyleItalic;
@@ -858,25 +947,17 @@ wxGDIPlusFontData::wxGDIPlusFontData( wxGraphicsRenderer* renderer,
     if ( font.GetWeight() == wxFONTWEIGHT_BOLD )
         style |= FontStyleBold;
 
-    Graphics* context = gc->GetGraphics();
-
-    Unit fontUnit = context->GetPageUnit();
-    // if fontUnit is UnitDisplay, then specify UnitPixel, otherwise
-    // you'll get a "InvalidParameter" from GDI+
-    if ( fontUnit == UnitDisplay )
-        fontUnit = UnitPixel;
-
-    REAL points = font.GetPointSize();
-
-    // This scaling is needed when we use unit other than the
-    // default UnitPoint. It works for both display and printing.
-    REAL size = points * (100.0 / 72.0);
-
-    // NB: font unit should match context's unit. We can use UnitPixel,
-    //     as that is what the print context should use.
-    m_font = new Font( s, size, style, fontUnit );
+    Init(font.GetFaceName(), font.GetPointSize(), style, col, UnitPoint);
+}
 
-    m_textBrush = new SolidBrush(wxColourToColor(col));
+wxGDIPlusFontData::wxGDIPlusFontData(wxGraphicsRenderer* renderer,
+                                     const wxString& name,
+                                     REAL sizeInPixels,
+                                     int style,
+                                     const wxColour& col) :
+    wxGraphicsObjectRefData(renderer)
+{
+    Init(name, sizeInPixels, style, col, UnitPixel);
 }
 
 wxGDIPlusFontData::~wxGDIPlusFontData()
@@ -895,13 +976,13 @@ wxGDIPlusFontData::~wxGDIPlusFontData()
 //-----------------------------------------------------------------------------
 
 wxGDIPlusBitmapData::wxGDIPlusBitmapData( wxGraphicsRenderer* renderer, Bitmap* bitmap ) :
-    wxGraphicsObjectRefData( renderer ), m_bitmap( bitmap )
+    wxGraphicsBitmapData( renderer ), m_bitmap( bitmap )
 {
     m_helper = NULL;
 }
 
 wxGDIPlusBitmapData::wxGDIPlusBitmapData( wxGraphicsRenderer* renderer,
-                        const wxBitmap &bmp) : wxGraphicsObjectRefData( renderer )
+                        const wxBitmap &bmp) : wxGraphicsBitmapData( renderer )
 {
     m_bitmap = NULL;
     m_helper = NULL;
@@ -1000,6 +1081,28 @@ wxGDIPlusBitmapData::wxGDIPlusBitmapData( wxGraphicsRenderer* renderer,
         m_bitmap = image;
 }
 
+#if wxUSE_IMAGE
+
+wxImage wxGDIPlusBitmapData::ConvertToImage() const
+{
+    // We could use Bitmap::LockBits() and convert to wxImage directly but
+    // passing by wxBitmap is easier. It would be nice to measure performance
+    // of the two methods but for this the second one would need to be written
+    // first...
+    HBITMAP hbmp;
+    if ( m_bitmap->GetHBITMAP(Color(0xffffffff), &hbmp) != Gdiplus::Ok )
+        return wxNullImage;
+
+    wxBitmap bmp;
+    bmp.SetWidth(m_bitmap->GetWidth());
+    bmp.SetHeight(m_bitmap->GetHeight());
+    bmp.SetHBITMAP(hbmp);
+    bmp.SetDepth(IsAlphaPixelFormat(m_bitmap->GetPixelFormat()) ? 32 : 24);
+    return bmp.ConvertToImage();
+}
+
+#endif // wxUSE_IMAGE
+
 wxGDIPlusBitmapData::~wxGDIPlusBitmapData()
 {
     delete m_bitmap;
@@ -1247,9 +1350,6 @@ void * wxGDIPlusMatrixData::GetNativeMatrix() const
 // wxGDIPlusContext implementation
 //-----------------------------------------------------------------------------
 
-IMPLEMENT_DYNAMIC_CLASS(wxGDIPlusContext,wxGraphicsContext)
-IMPLEMENT_DYNAMIC_CLASS(wxGDIPlusMeasuringContext,wxGDIPlusContext)
-
 class wxGDIPlusOffsetHelper
 {
 public :
@@ -1273,69 +1373,54 @@ public :
 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, HDC hdc, wxDouble width, wxDouble height   )
     : wxGraphicsContext(renderer)
 {
-    Init();
-    m_context = new Graphics( hdc);
-    m_width = width;
-    m_height = height;
-    SetDefaults();
+    Init(new Graphics(hdc), width, height);
 }
 
 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, const wxDC& dc )
     : wxGraphicsContext(renderer)
 {
-    Init();
-
     wxMSWDCImpl *msw = wxDynamicCast( dc.GetImpl() , wxMSWDCImpl );
     HDC hdc = (HDC) msw->GetHDC();
-
-    m_context = new Graphics(hdc);
     wxSize sz = dc.GetSize();
-    m_width = sz.x;
-    m_height = sz.y;
 
-    SetDefaults();
+    Init(new Graphics(hdc), sz.x, sz.y);
 }
 
 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, HWND hwnd  )
     : wxGraphicsContext(renderer)
 {
-    Init();
-    m_enableOffset = true;
-    m_context = new Graphics( hwnd);
     RECT rect = wxGetWindowRect(hwnd);
-    m_width = rect.right - rect.left;
-    m_height = rect.bottom - rect.top;
-    SetDefaults();
+    Init(new Graphics(hwnd), rect.right - rect.left, rect.bottom - rect.top);
+    m_enableOffset = true;
 }
 
 wxGDIPlusContext::wxGDIPlusContext( wxGraphicsRenderer* renderer, Graphics* gr  )
     : wxGraphicsContext(renderer)
 {
-    Init();
-    m_context = gr;
-    SetDefaults();
+    Init(gr, 0, 0);
 }
 
-wxGDIPlusContext::wxGDIPlusContext() : wxGraphicsContext(NULL)
+wxGDIPlusContext::wxGDIPlusContext(wxGraphicsRenderer* renderer)
+    : wxGraphicsContext(renderer)
 {
-    Init();
+    // Derived class must call Init() later but just set m_context to NULL for
+    // safety to avoid crashing in our dtor if Init() ends up not being called.
+    m_context = NULL;
 }
 
-void wxGDIPlusContext::Init()
+void wxGDIPlusContext::Init(Graphics* graphics, int width, int height)
 {
-    m_context = NULL;
+    m_context = graphics;
     m_state1 = 0;
-    m_state2= 0;
-    m_height = 0;
-    m_width = 0;
+    m_state2 = 0;
+    m_width = width;
+    m_height = height;
     m_fontScaleRatio = 1.0;
-}
 
-void wxGDIPlusContext::SetDefaults()
-{
     m_context->SetTextRenderingHint(TextRenderingHintSystemDefault);
     m_context->SetPixelOffsetMode(PixelOffsetModeHalf);
     m_context->SetSmoothingMode(SmoothingModeHighQuality);
+    m_context->SetInterpolationMode(InterpolationModeHighQuality);
     m_state1 = m_context->Save();
     m_state2 = m_context->Save();
 }
@@ -1481,10 +1566,44 @@ bool wxGDIPlusContext::SetAntialiasMode(wxAntialiasMode antialias)
     return true;
 }
 
-bool wxGDIPlusContext::SetInterpolationQuality(wxInterpolationQuality WXUNUSED(interpolation))
+bool wxGDIPlusContext::SetInterpolationQuality(wxInterpolationQuality interpolation)
 {
-    // placeholder
-    return false;
+    if (m_interpolation == interpolation)
+        return true;
+
+    InterpolationMode interpolationMode = InterpolationModeDefault;
+    switch (interpolation)
+    {
+        case wxINTERPOLATION_DEFAULT:
+            interpolationMode = InterpolationModeDefault;
+            break;
+
+        case wxINTERPOLATION_NONE:
+            interpolationMode = InterpolationModeNearestNeighbor;
+            break;
+
+        case wxINTERPOLATION_FAST:
+            interpolationMode = InterpolationModeLowQuality;
+            break;
+
+        case wxINTERPOLATION_GOOD:
+            interpolationMode = InterpolationModeHighQuality;
+            break;
+
+        case wxINTERPOLATION_BEST:
+            interpolationMode = InterpolationModeHighQualityBicubic;
+            break;
+
+        default:
+            return false;
+    }
+
+    if ( m_context->SetInterpolationMode(interpolationMode) != Gdiplus::Ok )
+        return false;
+
+    m_interpolation = interpolation;
+
+    return true;
 }
 
 bool wxGDIPlusContext::SetCompositionMode(wxCompositionMode op)
@@ -1644,17 +1763,8 @@ void wxGDIPlusContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxD
     DeleteObject(iconInfo.hbmMask);
 }
 
-wxGraphicsFont wxGDIPlusContext::CreateFont( const wxFont &font,
-                                             const wxColour &col ) const
-{
-    wxGDIPlusRenderer* renderer =
-        static_cast<wxGDIPlusRenderer*>(GetRenderer());
-    return renderer->CreateGDIPlusFont(this, font, col);
-}
-
-void wxGDIPlusContext::DoDrawFilledText(const wxString& str,
-                                        wxDouble x, wxDouble y,
-                                        const wxGraphicsBrush& brush)
+void wxGDIPlusContext::DoDrawText(const wxString& str,
+                                        wxDouble x, wxDouble y )
 {
    if (m_composition == wxCOMPOSITION_DEST)
         return;
@@ -1667,18 +1777,15 @@ void wxGDIPlusContext::DoDrawFilledText(const wxString& str,
 
     wxGDIPlusFontData * const
         fontData = (wxGDIPlusFontData *)m_font.GetRefData();
-    wxGDIPlusBrushData * const
-        brushData = (wxGDIPlusBrushData *)brush.GetRefData();
-
+ 
     m_context->DrawString
                (
                     str.wc_str(*wxConvUI),  // string to draw, always Unicode
                     -1,                     // length: string is NUL-terminated
                     fontData->GetGDIPlusFont(),
                     PointF(x, y),
-                    StringFormat::GenericTypographic(),
-                    brushData ? brushData->GetGDIPlusBrush()
-                              : fontData->GetGDIPlusBrush()
+                    GetDrawTextStringFormat(),
+                    fontData->GetGDIPlusBrush()
                );
 }
 
@@ -1695,12 +1802,14 @@ void wxGDIPlusContext::GetTextExtent( const wxString &str, wxDouble *width, wxDo
 
     REAL factorY = m_fontScaleRatio;
 
-    REAL rDescent = ffamily.GetCellDescent(FontStyleRegular) *
-        f->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
-    REAL rAscent = ffamily.GetCellAscent(FontStyleRegular) *
-        f->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
-    REAL rHeight = ffamily.GetLineSpacing(FontStyleRegular) *
-        f->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
+    // Notice that we must use the real font style or the results would be
+    // incorrect for italic/bold fonts.
+    const INT style = f->GetStyle();
+    const REAL size = f->GetSize();
+    const REAL emHeight = ffamily.GetEmHeight(style);
+    REAL rDescent = ffamily.GetCellDescent(style) * size / emHeight;
+    REAL rAscent = ffamily.GetCellAscent(style) * size / emHeight;
+    REAL rHeight = ffamily.GetLineSpacing(style) * size / emHeight;
 
     if ( height )
         *height = rHeight * factorY;
@@ -1717,11 +1826,9 @@ void wxGDIPlusContext::GetTextExtent( const wxString &str, wxDouble *width, wxDo
     else
     {
         RectF layoutRect(0,0, 100000.0f, 100000.0f);
-        StringFormat strFormat( StringFormat::GenericTypographic() );
-        strFormat.SetFormatFlags( StringFormatFlagsMeasureTrailingSpaces | strFormat.GetFormatFlags() );
 
         RectF bounds ;
-        m_context->MeasureString((const wchar_t *) s , wcslen(s) , f, layoutRect, &strFormat, &bounds ) ;
+        m_context->MeasureString((const wchar_t *) s , wcslen(s) , f, layoutRect, GetDrawTextStringFormat(), &bounds ) ;
         if ( width )
             *width = bounds.Width;
         if ( height )
@@ -1745,7 +1852,7 @@ void wxGDIPlusContext::GetPartialTextExtents(const wxString& text, wxArrayDouble
     wxASSERT_MSG(text.length() == len , wxT("GetPartialTextExtents not yet implemented for multichar situations"));
 
     RectF layoutRect(0,0, 100000.0f, 100000.0f);
-    StringFormat strFormat( StringFormat::GenericTypographic() );
+    StringFormat strFormat( GetDrawTextStringFormat() );
 
     size_t startPosition = 0;
     size_t remainder = len;
@@ -1763,7 +1870,6 @@ void wxGDIPlusContext::GetPartialTextExtents(const wxString& text, wxArrayDouble
             ranges[i].Length = startPosition+i+1 ;
         }
         strFormat.SetMeasurableCharacterRanges(span,ranges);
-        strFormat.SetFormatFlags( StringFormatFlagsMeasureTrailingSpaces | strFormat.GetFormatFlags() );
         m_context->MeasureCharacterRanges(ws, -1 , f,layoutRect, &strFormat,span,regions) ;
 
         RectF bbox ;
@@ -1906,7 +2012,7 @@ void wxGDIPlusRenderer::Unload()
     if ( m_gditoken )
     {
         GdiplusShutdown(m_gditoken);
-        m_gditoken = NULL;
+        m_gditoken = 0;
     }
     m_loaded = -1; // next Load() will try again
 }
@@ -1945,6 +2051,17 @@ wxGraphicsContext * wxGDIPlusRenderer::CreateContext( const wxMemoryDC& dc)
     return context;
 }
 
+#if wxUSE_IMAGE
+wxGraphicsContext * wxGDIPlusRenderer::CreateContextFromImage(wxImage& image)
+{
+    ENSURE_LOADED_OR_RETURN(NULL);
+    wxGDIPlusContext* context = new wxGDIPlusImageContext(this, image);
+    context->EnableOffset(true);
+    return context;
+}
+
+#endif // wxUSE_IMAGE
+
 wxGraphicsContext * wxGDIPlusRenderer::CreateMeasuringContext()
 {
     ENSURE_LOADED_OR_RETURN(NULL);
@@ -2049,21 +2166,45 @@ wxGDIPlusRenderer::CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
 }
 
 wxGraphicsFont
-wxGDIPlusRenderer::CreateGDIPlusFont( const wxGDIPlusContext* gc,
-                                      const wxFont &font,
-                                      const wxColour &col )
+wxGDIPlusRenderer::CreateFont( const wxFont &font,
+                               const wxColour &col )
 {
     ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
     if ( font.IsOk() )
     {
         wxGraphicsFont p;
-        p.SetRefData(new wxGDIPlusFontData( this, gc, font, col ));
+        p.SetRefData(new wxGDIPlusFontData( this, font, col ));
         return p;
     }
     else
         return wxNullGraphicsFont;
 }
 
+wxGraphicsFont
+wxGDIPlusRenderer::CreateFont(double size,
+                              const wxString& facename,
+                              int flags,
+                              const wxColour& col)
+{
+    ENSURE_LOADED_OR_RETURN(wxNullGraphicsFont);
+
+    // Convert wxFont flags to GDI+ style:
+    int style = FontStyleRegular;
+    if ( flags & wxFONTFLAG_ITALIC )
+        style |= FontStyleItalic;
+    if ( flags & wxFONTFLAG_UNDERLINED )
+        style |= FontStyleUnderline;
+    if ( flags & wxFONTFLAG_BOLD )
+        style |= FontStyleBold;
+    if ( flags & wxFONTFLAG_STRIKETHROUGH )
+        style |= FontStyleStrikeout;
+
+
+    wxGraphicsFont f;
+    f.SetRefData(new wxGDIPlusFontData(this, facename, size, style, col));
+    return f;
+}
+
 wxGraphicsBitmap wxGDIPlusRenderer::CreateBitmap( const wxBitmap &bitmap )
 {
     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
@@ -2077,6 +2218,40 @@ wxGraphicsBitmap wxGDIPlusRenderer::CreateBitmap( const wxBitmap &bitmap )
         return wxNullGraphicsBitmap;
 }
 
+#if wxUSE_IMAGE
+
+wxGraphicsBitmap wxGDIPlusRenderer::CreateBitmapFromImage(const wxImage& image)
+{
+    ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
+    if ( image.IsOk() )
+    {
+        // Notice that we rely on conversion from wxImage to wxBitmap here but
+        // we could probably do it more efficiently by converting from wxImage
+        // to GDI+ Bitmap directly, i.e. copying wxImage pixels to the buffer
+        // returned by Bitmap::LockBits(). However this would require writing
+        // code specific for this task while like this we can reuse existing
+        // code (see also wxGDIPlusBitmapData::ConvertToImage()).
+        wxGraphicsBitmap gb;
+        gb.SetRefData(new wxGDIPlusBitmapData(this, image));
+        return gb;
+    }
+    else
+        return wxNullGraphicsBitmap;
+}
+
+
+wxImage wxGDIPlusRenderer::CreateImageFromBitmap(const wxGraphicsBitmap& bmp)
+{
+    ENSURE_LOADED_OR_RETURN(wxNullImage);
+    const wxGDIPlusBitmapData* const
+        data = static_cast<wxGDIPlusBitmapData*>(bmp.GetGraphicsData());
+
+    return data ? data->ConvertToImage() : wxNullImage;
+}
+
+#endif // wxUSE_IMAGE
+
+
 wxGraphicsBitmap wxGDIPlusRenderer::CreateBitmapFromNativeBitmap( void *bitmap )
 {
     ENSURE_LOADED_OR_RETURN(wxNullGraphicsBitmap);
@@ -2109,7 +2284,12 @@ class wxGDIPlusRendererModule : public wxModule
 {
 public:
     virtual bool OnInit() { return true; }
-    virtual void OnExit() { gs_GDIPlusRenderer.Unload(); }
+    virtual void OnExit()
+    {
+        wxDELETE(gs_drawTextStringFormat);
+
+        gs_GDIPlusRenderer.Unload();
+    }
 
 private:
     DECLARE_DYNAMIC_CLASS(wxGDIPlusRendererModule)
@@ -2127,6 +2307,14 @@ WXHDC wxGCDC::AcquireHDC()
     if ( !gc )
         return NULL;
 
+#if wxUSE_CAIRO
+    // we can't get the HDC if it is not a GDI+ context
+    wxGraphicsRenderer* r1 = gc->GetRenderer();
+    wxGraphicsRenderer* r2 = wxGraphicsRenderer::GetCairoRenderer();
+    if (r1 == r2)
+        return NULL;
+#endif
+
     Graphics * const g = static_cast<Graphics *>(gc->GetNativeContext());
     return g ? g->GetHDC() : NULL;
 }
@@ -2139,6 +2327,14 @@ void wxGCDC::ReleaseHDC(WXHDC hdc)
     wxGraphicsContext * const gc = GetGraphicsContext();
     wxCHECK_RET( gc, "can't release HDC because there is no wxGraphicsContext" );
 
+#if wxUSE_CAIRO
+    // we can't get the HDC if it is not a GDI+ context
+    wxGraphicsRenderer* r1 = gc->GetRenderer();
+    wxGraphicsRenderer* r2 = wxGraphicsRenderer::GetCairoRenderer();
+    if (r1 == r2)
+        return;
+#endif
+
     Graphics * const g = static_cast<Graphics *>(gc->GetNativeContext());
     wxCHECK_RET( g, "can't release HDC because there is no Graphics" );