cairo implementation

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41599 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2006-10-03 16:47:17 +00:00 · 2006-10-03 16:47:17 +00:00 · 184fc6c87d
commit 184fc6c87d
parent dc8883366b
1 changed files with 868 additions and 0 deletions
--- a/src/generic/graphicc.cpp
+++ b/src/generic/graphicc.cpp
@ -0,0 +1,868 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        src/generic/graphicc.cpp
+// Purpose:     cairo device context class
+// Author:      Stefan Csomor
+// Modified by:
+// Created:     01/02/97
+// RCS-ID:      $Id$
+// Copyright:   (c) Stefan Csomor
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#include "wx/wxprec.h"
+
+#include "wx/dc.h"
+
+// For compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+#pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+#include "wx/image.h"
+#include "wx/window.h"
+#include "wx/dc.h"
+#include "wx/utils.h"
+#include "wx/dialog.h"
+#include "wx/app.h"
+#include "wx/bitmap.h"
+#include "wx/dcmemory.h"
+#include "wx/log.h"
+#include "wx/icon.h"
+#include "wx/dcprint.h"
+#include "wx/module.h"
+#endif
+
+#include "wx/graphics.h"
+
+#include <vector>
+
+using namespace std;
+
+//-----------------------------------------------------------------------------
+// constants
+//-----------------------------------------------------------------------------
+
+const double RAD2DEG = 180.0 / M_PI;
+
+//-----------------------------------------------------------------------------
+// Local functions
+//-----------------------------------------------------------------------------
+
+static inline double dmin(double a, double b)
+{
+    return a < b ? a : b;
+}
+static inline double dmax(double a, double b)
+{
+    return a > b ? a : b;
+}
+
+static inline double DegToRad(double deg)
+{
+    return (deg * M_PI) / 180.0;
+}
+static inline double RadToDeg(double deg)
+{
+    return (deg * 180.0) / M_PI;
+}
+
+//-----------------------------------------------------------------------------
+// device context implementation
+//
+// more and more of the dc functionality should be implemented by calling
+// the appropricate wxCairoContext, but we will have to do that step by step
+// also coordinate conversions should be moved to native matrix ops
+//-----------------------------------------------------------------------------
+
+// we always stock two context states, one at entry, to be able to preserve the
+// state we were called with, the other one after changing to HI Graphics orientation
+// (this one is used for getting back clippings etc)
+
+//-----------------------------------------------------------------------------
+// wxGraphicsPath implementation
+//-----------------------------------------------------------------------------
+
+// TODO remove this dependency (gdiplus needs the macros)
+
+#ifndef max
+#define max(a,b)            (((a) > (b)) ? (a) : (b))
+#endif
+
+#ifndef min
+#define min(a,b)            (((a) < (b)) ? (a) : (b))
+#endif
+
+#include <cairo.h>
+#include <gtk/gtk.h>
+
+class WXDLLEXPORT wxCairoPath : public wxGraphicsPath
+{
+    DECLARE_NO_COPY_CLASS(wxCairoPath)
+public :
+    wxCairoPath();
+    ~wxCairoPath();
+
+
+    //
+    // These are the path primitives from which everything else can be constructed
+    //
+
+    // begins a new subpath at (x,y)
+    virtual void MoveToPoint( wxDouble x, wxDouble y );
+
+    // adds a straight line from the current point to (x,y)
+    virtual void AddLineToPoint( wxDouble x, wxDouble y );
+
+    // adds a cubic Bezier curve from the current point, using two control points and an end point
+    virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
+
+
+    // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
+    virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
+
+    // gets the last point of the current path, (0,0) if not yet set
+    virtual void GetCurrentPoint( wxDouble& x, wxDouble&y) ;
+
+    // closes the current sub-path
+    virtual void CloseSubpath();
+
+    //
+    // These are convenience functions which - if not available natively will be assembled
+    // using the primitives from above
+    //
+
+    /*
+
+    // 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
+    virtual void AddEllipsis( 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 )  ;
+    */
+
+    cairo_path_t* GetPath() const;
+private :
+    cairo_t* m_pathContext;
+};
+
+wxCairoPath::wxCairoPath()
+{
+    cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1);
+    m_pathContext = cairo_create(surface);
+    cairo_surface_destroy (surface);
+}
+
+wxCairoPath::~wxCairoPath()
+{
+    cairo_destroy(m_pathContext);
+}
+
+cairo_path_t* wxCairoPath::GetPath() const
+{
+    return cairo_copy_path(m_pathContext) ;
+}
+
+//
+// The Primitives
+//
+
+void wxCairoPath::MoveToPoint( wxDouble x , wxDouble y )
+{
+    cairo_move_to(m_pathContext,x,y);
+}
+
+void wxCairoPath::AddLineToPoint( wxDouble x , wxDouble y )
+{
+    cairo_line_to(m_pathContext,x,y);
+}
+
+void wxCairoPath::CloseSubpath()
+{
+    cairo_close_path(m_pathContext);
+}
+
+void wxCairoPath::AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y )
+{
+    cairo_curve_to(m_pathContext,cx1,cy1,cx2,cy2,x,y);
+}
+
+// gets the last point of the current path, (0,0) if not yet set
+void wxCairoPath::GetCurrentPoint( wxDouble& x, wxDouble&y)
+{
+    double dx,dy;
+    cairo_get_current_point(m_pathContext,&dx,&dy);
+    x = dx;
+    y = dy;
+}
+
+void wxCairoPath::AddArc( wxDouble x, wxDouble y, wxDouble r, double startAngle, double endAngle, bool clockwise )
+{
+    // as clockwise means positive in our system (y pointing downwards) 
+    // TODO make this interpretation dependent of the
+    // real device trans
+    if ( clockwise||(endAngle-startAngle)>=2*M_PI)
+        cairo_arc(m_pathContext,x,y,r,startAngle,endAngle);
+    else
+        cairo_arc_negative(m_pathContext,x,y,r,startAngle,endAngle);
+}
+
+/*
+void wxCairoPath::AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
+{
+    m_path->AddRectangle(RectF(x,y,w,h));
+}
+*/
+//
+//
+//
+/*
+// closes the current subpath
+void wxCairoPath::AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r ) 
+{
+//    CGPathAddArcToPoint( m_path, NULL , x1, y1, x2, y2, r); 
+}
+ 
+*/
+
+class WXDLLEXPORT wxCairoContext : public wxGraphicsContext
+{
+    DECLARE_NO_COPY_CLASS(wxCairoContext)
+
+public:
+    wxCairoContext( const wxWindowDC& dc );
+    wxCairoContext();
+    virtual ~wxCairoContext();
+
+    virtual void Clip( const wxRegion &region );
+    virtual void StrokePath( const wxGraphicsPath *p );
+    virtual void FillPath( const wxGraphicsPath *p , int fillStyle = wxWINDING_RULE );
+
+    virtual wxGraphicsPath* CreatePath();
+    virtual void SetPen( const wxPen &pen );
+    virtual void SetBrush( const wxBrush &brush );
+    virtual void SetLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2) ;
+    virtual void SetRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
+                                         const wxColour &oColor, const wxColour &cColor);
+
+    virtual void Translate( wxDouble dx , wxDouble dy );
+    virtual void Scale( wxDouble xScale , wxDouble yScale );
+    virtual void Rotate( wxDouble angle );
+
+    virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
+    virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h );
+    virtual void PushState();
+    virtual void PopState();
+
+    virtual void SetFont( const wxFont &font );
+    virtual void SetTextColor( const wxColour &col );
+    virtual void DrawText( const wxString &str, wxDouble x, wxDouble y);
+    virtual void GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
+                                wxDouble *descent, wxDouble *externalLeading ) const;
+    virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const;
+
+private:
+    cairo_t* m_context;
+    bool m_penTransparent;
+    bool m_brushTransparent;
+
+    wxPen m_pen;
+    wxBrush m_brush;
+    cairo_pattern_t* m_brushPattern;
+    wxColour m_textColour;
+};
+
+
+
+
+//-----------------------------------------------------------------------------
+// wxCairoContext implementation
+//-----------------------------------------------------------------------------
+
+wxCairoContext::wxCairoContext( const wxWindowDC& dc  )
+{
+    m_context = gdk_cairo_create( dc.m_window ) ;
+    PushState();
+    PushState();
+    m_penTransparent = true;
+    m_brushTransparent = true;
+    m_brushPattern = NULL ;
+}
+
+wxCairoContext::~wxCairoContext()
+{
+    if ( m_context )
+    {
+        PopState();
+        PopState();
+        cairo_destroy(m_context);
+        if ( m_brushPattern )
+            cairo_pattern_destroy(m_brushPattern);
+    }
+}
+
+
+void wxCairoContext::Clip( const wxRegion &region )
+{
+    //    ClipCGContextToRegion ( m_context, &bounds , (RgnHandle) dc->m_macCurrentClipRgn );
+}
+
+void wxCairoContext::StrokePath( const wxGraphicsPath *p )
+{
+    if ( m_penTransparent )
+        return;
+
+    const wxCairoPath* path = dynamic_cast< const wxCairoPath*>( p );
+    cairo_path_t* cp = path->GetPath() ;
+    cairo_append_path(m_context,cp);
+
+    // setup pen
+
+    // TODO: * m_dc->m_scaleX
+    double penWidth = m_pen.GetWidth();
+    if (penWidth <= 0.0)
+        penWidth = 0.1;
+
+    cairo_set_line_width(m_context,penWidth);
+    cairo_set_source_rgba(m_context,m_pen.GetColour().Red()/255.0,
+                          m_pen.GetColour().Green()/255.0, m_pen.GetColour().Blue()/255.0,m_pen.GetColour().Alpha()/255.0);
+
+    cairo_line_cap_t cap;
+    switch ( m_pen.GetCap() )
+    {
+    case wxCAP_ROUND :
+        cap = CAIRO_LINE_CAP_ROUND;
+        break;
+
+    case wxCAP_PROJECTING :
+        cap = CAIRO_LINE_CAP_SQUARE;
+        break;
+
+    case wxCAP_BUTT :
+        cap = CAIRO_LINE_CAP_BUTT;
+        break;
+
+    default :
+        cap = CAIRO_LINE_CAP_BUTT;
+        break;
+    }
+    cairo_set_line_cap(m_context,cap);
+
+    cairo_line_join_t join;
+    switch ( m_pen.GetJoin() )
+    {
+    case wxJOIN_BEVEL :
+        join = CAIRO_LINE_JOIN_BEVEL;
+        break;
+
+    case wxJOIN_MITER :
+        join = CAIRO_LINE_JOIN_MITER;
+        break;
+
+    case wxJOIN_ROUND :
+        join = CAIRO_LINE_JOIN_ROUND;
+        break;
+
+    default :
+        join = CAIRO_LINE_JOIN_MITER;
+        break;
+    }
+    cairo_set_line_join(m_context,join);
+
+    int num_dashes = 0;
+    const double * dashes = NULL;
+    double offset = 0.0;
+
+    const double dashUnit = penWidth < 1.0 ? 1.0 : penWidth;
+
+    double *userLengths = NULL;
+    const double dotted[] =
+        {
+            dashUnit , dashUnit + 2.0
+        };
+    const double short_dashed[] =
+        {
+            9.0 , 6.0
+        };
+    const double dashed[] =
+        {
+            19.0 , 9.0
+        };
+    const double dotted_dashed[] =
+        {
+            9.0 , 6.0 , 3.0 , 3.0
+        };
+
+    switch ( m_pen.GetStyle() )
+    {
+    case wxSOLID :
+        break;
+
+    case wxDOT :
+        dashes = dotted ;
+        num_dashes = WXSIZEOF(dotted)
+                     ;
+        break;
+
+    case wxLONG_DASH :
+        dashes = dotted ;
+        num_dashes = WXSIZEOF(dashed);
+        break;
+
+    case wxSHORT_DASH :
+        dashes = dotted ;
+        num_dashes = WXSIZEOF(short_dashed);
+        break;
+
+    case wxDOT_DASH :
+        dashes = dotted ;
+        num_dashes = WXSIZEOF(dotted_dashed);
+        break;
+
+    case wxUSER_DASH :
+        {
+            wxDash *wxdashes ;
+            num_dashes = m_pen.GetDashes( &wxdashes ) ;
+            if ((wxdashes != NULL) && (num_dashes > 0))
+            {
+                userLengths = new double[num_dashes] ;
+                for ( int i = 0 ; i < num_dashes ; ++i )
+                {
+                    userLengths[i] = wxdashes[i] * dashUnit ;
+
+                    if ( i % 2 == 1 && userLengths[i] < dashUnit + 2.0 )
+                        userLengths[i] = dashUnit + 2.0 ;
+                    else if ( i % 2 == 0 && userLengths[i] < dashUnit )
+                        userLengths[i] = dashUnit ;
+                }
+            }
+            dashes = userLengths ;
+        }
+        break;
+    case wxSTIPPLE :
+        {
+            /*
+                        wxBitmap* bmp = pen.GetStipple();
+                        if ( bmp && bmp->Ok() )
+                        {
+                            wxDELETE( m_penImage );
+                            wxDELETE( m_penBrush );
+                            m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
+                            m_penBrush = new TextureBrush(m_penImage);
+                            m_pen->SetBrush( m_penBrush );
+                        }
+            */
+        }
+        break;
+    default :
+        if ( m_pen.GetStyle() >= wxFIRST_HATCH && m_pen.GetStyle() <= wxLAST_HATCH )
+        {
+            /*
+                        wxDELETE( m_penBrush );
+                        HatchStyle style = HatchStyleHorizontal;
+                        switch( pen.GetStyle() )
+                        {
+                        case wxBDIAGONAL_HATCH :
+                            style = HatchStyleBackwardDiagonal;
+                            break ;
+                        case wxCROSSDIAG_HATCH :
+                            style = HatchStyleDiagonalCross;
+                            break ;
+                        case wxFDIAGONAL_HATCH :
+                            style = HatchStyleForwardDiagonal;
+                            break ;
+                        case wxCROSS_HATCH :
+                            style = HatchStyleCross;
+                            break ;
+                        case wxHORIZONTAL_HATCH :
+                            style = HatchStyleHorizontal;
+                            break ;
+                        case wxVERTICAL_HATCH :
+                            style = HatchStyleVertical;
+                            break ;
+             
+                        }
+                        m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
+                            pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
+                        m_pen->SetBrush( m_penBrush )
+            */
+        }
+        break;
+    }
+
+    cairo_set_dash(m_context,(double*)dashes,num_dashes,offset);
+    if ( userLengths )
+        delete[] userLengths;
+    cairo_stroke(m_context);
+    cairo_path_destroy(cp);
+}
+
+void wxCairoContext::FillPath( const wxGraphicsPath *p , int fillStyle )
+{
+    if ( !m_brushTransparent )
+    {
+        const wxCairoPath* path = dynamic_cast< const wxCairoPath*>( p );
+        cairo_path_t* cp = path->GetPath() ;
+        cairo_append_path(m_context,cp);
+
+        if ( m_brushPattern )
+        {
+            cairo_set_source(m_context,m_brushPattern);
+        }
+        else
+        {
+            cairo_set_source_rgba(m_context,m_brush.GetColour().Red()/255.0,
+                                  m_brush.GetColour().Green()/255.0,
+                                  m_brush.GetColour().Blue()/255.0,
+                                  m_brush.GetColour().Alpha()/255.0);
+        }
+
+        cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING);
+        cairo_fill(m_context);
+        cairo_path_destroy(cp);
+    }
+}
+
+wxGraphicsPath* wxCairoContext::CreatePath()
+{
+    return new wxCairoPath();
+}
+
+void wxCairoContext::Rotate( wxDouble angle )
+{
+    cairo_rotate(m_context,angle);
+}
+
+void wxCairoContext::Translate( wxDouble dx , wxDouble dy )
+{
+    cairo_translate(m_context,dx,dy);
+}
+
+void wxCairoContext::Scale( wxDouble xScale , wxDouble yScale )
+{
+    cairo_scale(m_context,xScale,yScale);
+    /*
+        PointF penWidth( m_pen->GetWidth(), 0);
+        Matrix matrix ;
+        if ( !m_penTransparent )
+        {
+                m_context->GetTransform(&matrix);
+                matrix.TransformVectors(&penWidth);
+        }
+        m_context->ScaleTransform(xScale,yScale);
+        if ( !m_penTransparent )
+        {
+            m_context->GetTransform(&matrix);
+            matrix.Invert();
+            matrix.TransformVectors(&penWidth) ;
+            m_pen->SetWidth( sqrt( penWidth.X*penWidth.X  + penWidth.Y*penWidth.Y));
+        }
+    */
+}
+
+void wxCairoContext::PushState()
+{
+    cairo_save(m_context);
+}
+
+void wxCairoContext::PopState()
+{
+    cairo_restore(m_context);
+}
+
+void wxCairoContext::SetTextColor( const wxColour &col )
+{
+    m_textColour = col;
+}
+
+void wxCairoContext::SetPen( const wxPen &pen )
+{
+    m_pen = pen ;
+    m_penTransparent = pen.GetStyle() == wxTRANSPARENT;
+    if ( m_penTransparent )
+        return;
+
+    /*
+     
+        case wxSTIPPLE :
+            {
+                wxBitmap* bmp = pen.GetStipple();
+                if ( bmp && bmp->Ok() )
+                {
+                    wxDELETE( m_penImage );
+                    wxDELETE( m_penBrush );
+                    m_penImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
+                    m_penBrush = new TextureBrush(m_penImage);
+                    m_pen->SetBrush( m_penBrush );
+                }
+     
+            }
+            break;
+        default :
+            if ( pen.GetStyle() >= wxFIRST_HATCH && pen.GetStyle() <= wxLAST_HATCH )
+            {
+                wxDELETE( m_penBrush );
+                HatchStyle style = HatchStyleHorizontal;
+                switch( pen.GetStyle() )
+                {
+                case wxBDIAGONAL_HATCH :
+                    style = HatchStyleBackwardDiagonal;
+                    break ;
+                case wxCROSSDIAG_HATCH :
+                    style = HatchStyleDiagonalCross;
+                    break ;
+                case wxFDIAGONAL_HATCH :
+                    style = HatchStyleForwardDiagonal;
+                    break ;
+                case wxCROSS_HATCH :
+                    style = HatchStyleCross;
+                    break ;
+                case wxHORIZONTAL_HATCH :
+                    style = HatchStyleHorizontal;
+                    break ;
+                case wxVERTICAL_HATCH :
+                    style = HatchStyleVertical;
+                    break ;
+     
+                }
+                m_penBrush = new HatchBrush(style,Color( pen.GetColour().Alpha() , pen.GetColour().Red() ,
+                    pen.GetColour().Green() , pen.GetColour().Blue() ), Color.Transparent );
+                m_pen->SetBrush( m_penBrush );
+            }
+            break;
+        } 
+        if ( dashStyle != DashStyleSolid )
+            m_pen->SetDashStyle(dashStyle);
+    */
+}
+
+void wxCairoContext::SetBrush( const wxBrush &brush )
+{
+    m_brush = brush;
+    if (m_brushPattern)
+    {
+        cairo_pattern_destroy(m_brushPattern);
+        m_brushPattern = NULL;
+    }
+    m_brushTransparent = brush.GetStyle() == wxTRANSPARENT;
+
+    if ( m_brushTransparent )
+        return;
+    /*
+        wxDELETE(m_brush);
+     
+        if ( brush.GetStyle() == wxSOLID)
+        {
+            m_brush = new SolidBrush( Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
+                brush.GetColour().Green() , brush.GetColour().Blue() ) );
+        }
+        else if ( brush.IsHatch() )
+        {
+            HatchStyle style = HatchStyleHorizontal;
+            switch( brush.GetStyle() )
+            {
+            case wxBDIAGONAL_HATCH :
+                style = HatchStyleBackwardDiagonal;
+                break ;
+            case wxCROSSDIAG_HATCH :
+                style = HatchStyleDiagonalCross;
+                break ;
+            case wxFDIAGONAL_HATCH :
+                style = HatchStyleForwardDiagonal;
+                break ;
+            case wxCROSS_HATCH :
+                style = HatchStyleCross;
+                break ;
+            case wxHORIZONTAL_HATCH :
+                style = HatchStyleHorizontal;
+                break ;
+            case wxVERTICAL_HATCH :
+                style = HatchStyleVertical;
+                break ;
+     
+            }
+            m_brush = new HatchBrush(style,Color( brush.GetColour().Alpha() , brush.GetColour().Red() ,
+                brush.GetColour().Green() , brush.GetColour().Blue() ), Color.Transparent );
+        }
+        else 
+        {
+            wxBitmap* bmp = brush.GetStipple();
+            if ( bmp && bmp->Ok() )
+            {
+                wxDELETE( m_brushImage );
+                m_brushImage = Bitmap::FromHBITMAP((HBITMAP)bmp->GetHBITMAP(),(HPALETTE)bmp->GetPalette()->GetHPALETTE());
+                m_brush = new TextureBrush(m_brushImage);
+            }
+        }
+    */
+}
+
+void wxCairoContext::SetLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2)
+{
+    if ( m_brushPattern )
+    {
+        cairo_pattern_destroy(m_brushPattern);
+        m_brushPattern=NULL;
+    }
+    
+    m_brushTransparent = false;
+    m_brushPattern = cairo_pattern_create_linear(x1,y1,x2,y2);
+    cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,c1.Red()/255.0,
+                          c1.Green()/255.0, c1.Blue()/255.0,c1.Alpha()/255.0);
+    cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,c2.Red()/255.0,
+                          c2.Green()/255.0, c2.Blue()/255.0,c2.Alpha()/255.0);
+    wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
+}
+
+void wxCairoContext::SetRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
+        const wxColour &oColor, const wxColour &cColor)
+{
+   if ( m_brushPattern )
+    {
+        cairo_pattern_destroy(m_brushPattern);
+        m_brushPattern=NULL;
+    }
+    
+    m_brushTransparent = false;
+    m_brushPattern = cairo_pattern_create_radial(xo,yo,0.0,xc,yc,radius);
+    cairo_pattern_add_color_stop_rgba(m_brushPattern,0.0,oColor.Red()/255.0,
+                          oColor.Green()/255.0, oColor.Blue()/255.0,oColor.Alpha()/255.0);
+    cairo_pattern_add_color_stop_rgba(m_brushPattern,1.0,cColor.Red()/255.0,
+                          cColor.Green()/255.0, cColor.Blue()/255.0,cColor.Alpha()/255.0);
+    wxASSERT_MSG(cairo_pattern_status(m_brushPattern) == CAIRO_STATUS_SUCCESS, wxT("Couldn't create cairo pattern"));
+ }
+
+void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
+{
+    /*
+        Bitmap* image = Bitmap::FromHBITMAP((HBITMAP)bmp.GetHBITMAP(),(HPALETTE)bmp.GetPalette()->GetHPALETTE());
+        m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
+        delete image ;
+    */
+}
+
+void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h )
+{
+    /*
+        Bitmap* image = Bitmap::FromHICON((HICON)icon.GetHICON());
+        m_context->DrawImage(image,(REAL) x,(REAL) y,(REAL) w,(REAL) h) ;
+        delete image ;
+    */
+}
+
+
+void wxCairoContext::DrawText( const wxString &str, wxDouble x, wxDouble y )
+{
+    if ( str.IsEmpty())
+        return ;
+    cairo_move_to(m_context,x,y);
+    const wxWX2MBbuf buf(str.mb_str(wxConvUTF8));
+
+    cairo_set_source_rgba(m_context,m_textColour.Red()/255.0,
+                          m_textColour.Green()/255.0, m_textColour.Blue()/255.0,m_textColour.Alpha()/255.0);
+    cairo_show_text(m_context,buf);
+
+    // TODO m_backgroundMode == wxSOLID
+}
+
+void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height,
+                                    wxDouble *descent, wxDouble *externalLeading ) const
+{
+    /*
+        wxWCharBuffer s = str.wc_str( *wxConvUI );
+        FontFamily ffamily ;
+        
+        m_font->GetFamily(&ffamily) ;
+     
+        REAL factorY = m_context->GetDpiY() / 72.0 ;
+     
+        REAL rDescent = ffamily.GetCellDescent(FontStyleRegular) *
+            m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
+        REAL rAscent = ffamily.GetCellAscent(FontStyleRegular) *
+            m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
+        REAL rHeight = ffamily.GetLineSpacing(FontStyleRegular) *
+            m_font->GetSize() / ffamily.GetEmHeight(FontStyleRegular);
+     
+        if ( height )
+            *height = rHeight * factorY + 0.5 ;
+        if ( descent )
+            *descent = rDescent * factorY + 0.5 ;
+        if ( externalLeading )
+            *externalLeading = (rHeight - rAscent - rDescent) * factorY + 0.5 ;
+        // measuring empty strings is not guaranteed, so do it by hand
+        if ( str.IsEmpty()) 
+        {
+            if ( width )
+                *width = 0 ;
+        }
+        else
+        {
+            // MeasureString does return a rectangle that is way too large, so it is
+            // not usable here
+            RectF layoutRect(0,0, 100000.0f, 100000.0f);
+            StringFormat strFormat;
+            CharacterRange strRange(0,wcslen(s));
+            strFormat.SetMeasurableCharacterRanges(1,&strRange);
+            Region region ;
+            m_context->MeasureCharacterRanges(s, -1 , m_font,layoutRect, &strFormat,1,&region) ;
+            RectF bbox ;
+            region.GetBounds(&bbox,m_context);
+            if ( width )
+                *width = bbox.GetRight()-bbox.GetLeft()+0.5;
+        }
+    */
+}
+
+void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const
+{
+    widths.Empty();
+    widths.Add(0, text.length());
+
+    if (text.empty())
+        return;
+    /*
+        wxWCharBuffer ws = text.wc_str( *wxConvUI );
+        size_t len = wcslen( ws ) ;
+        wxASSERT_MSG(text.length() == len , wxT("GetPartialTextExtents not yet implemented for multichar situations"));
+     
+        RectF layoutRect(0,0, 100000.0f, 100000.0f);
+        StringFormat strFormat;
+     
+        CharacterRange* ranges = new CharacterRange[len] ;
+        Region* regions = new Region[len];
+        for( int i = 0 ; i < len ; ++i)
+        {
+            ranges[i].First = i ;
+            ranges[i].Length = 1 ;
+        }
+        strFormat.SetMeasurableCharacterRanges(len,ranges);
+        m_context->MeasureCharacterRanges(ws, -1 , m_font,layoutRect, &strFormat,1,regions) ;
+     
+        RectF bbox ;
+        for ( int i = 0 ; i < len ; ++i)
+        {
+            regions[i].GetBounds(&bbox,m_context);
+            widths[i] = bbox.GetRight()-bbox.GetLeft();
+        }
+    */
+}
+
+void wxCairoContext::SetFont( const wxFont &font )
+{
+    cairo_select_font_face(m_context,font.GetFaceName().mb_str(wxConvUTF8),
+                           font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL,
+                           font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL);
+
+    cairo_set_font_size(m_context,font.GetPointSize());
+    // TODO UNDERLINE
+    // TODO FIX SIZE
+}
+
+wxGraphicsContext* wxGraphicsContext::Create( const wxWindowDC& dc )
+{
+    return new wxCairoContext(dc);
+}