///////////////////////////////////////////////////////////////////////////// // Name: src/generic/graphicc.cpp // Purpose: cairo device context class // Author: Stefan Csomor // Modified by: // Created: 2006-10-03 // RCS-ID: $Id: graphicc.cpp 66928 2011-02-16 23:31:13Z JS $ // Copyright: (c) 2006 Stefan Csomor // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// #include "wx/wxprec.h" #ifdef __BORLANDC__ #pragma hdrstop #endif #if wxUSE_GRAPHICS_CONTEXT #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 #ifdef __WXGTK__ #include "wx/gtk/win_gtk.h" #endif #include "wx/graphics.h" #include "wx/rawbmp.h" #if wxUSE_CAIRO //----------------------------------------------------------------------------- // 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 #ifdef __WXMSW__ #include #endif #ifdef __WXGTK__ #include #endif class WXDLLIMPEXP_CORE wxCairoPathData : public wxGraphicsPathData { public : wxCairoPathData(wxGraphicsRenderer* renderer, cairo_t* path = NULL); ~wxCairoPathData(); virtual wxGraphicsObjectRefData *Clone() const; // // 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) const; // adds another path virtual void AddPath( const wxGraphicsPathData* path ); // 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 ) ; */ // returns the native path virtual void * GetNativePath() const ; // give the native path returned by GetNativePath() back (there might be some deallocations necessary) virtual void UnGetNativePath(void *p) const; // transforms each point of this path by the matrix 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 *h) const; virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxWINDING_RULE) const; private : cairo_t* m_pathContext; }; class WXDLLIMPEXP_CORE wxCairoMatrixData : public wxGraphicsMatrixData { public : wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix = NULL ) ; virtual ~wxCairoMatrixData() ; virtual wxGraphicsObjectRefData *Clone() const ; // concatenates the matrix virtual void Concat( const wxGraphicsMatrixData *t ); // sets the matrix to the respective values virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0, wxDouble tx=0.0, wxDouble ty=0.0); // gets the component valuess of the matrix virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL, wxDouble* c=NULL, wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const; // makes this the inverse matrix virtual void Invert(); // returns true if the elements of the transformation matrix are equal ? virtual bool IsEqual( const wxGraphicsMatrixData* t) const ; // return true if this is the identity matrix virtual bool IsIdentity() const; // // transformation // // add the translation to this matrix virtual void Translate( wxDouble dx , wxDouble dy ); // add the scale to this matrix virtual void Scale( wxDouble xScale , wxDouble yScale ); // add the rotation to this matrix (radians) virtual void Rotate( wxDouble angle ); // // apply the transforms // // applies that matrix to the point virtual void TransformPoint( wxDouble *x, wxDouble *y ) const; // applies the matrix except for translations virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const; // returns the native representation virtual void * GetNativeMatrix() const; private: cairo_matrix_t m_matrix ; } ; class WXDLLIMPEXP_CORE wxCairoPenData : public wxGraphicsObjectRefData { public: wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen ); ~wxCairoPenData(); void Init(); virtual void Apply( wxGraphicsContext* context ); virtual wxDouble GetWidth() { return m_width; } private : double m_width; double m_red; double m_green; double m_blue; double m_alpha; cairo_line_cap_t m_cap; cairo_line_join_t m_join; int m_count; const double *m_lengths; double *m_userLengths; wxPen m_pen; }; class WXDLLIMPEXP_CORE wxCairoBrushData : public wxGraphicsObjectRefData { public: wxCairoBrushData( wxGraphicsRenderer* renderer ); wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush ); ~wxCairoBrushData (); 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 ); protected: virtual void Init(); private : double m_red; double m_green; double m_blue; double m_alpha; cairo_pattern_t* m_brushPattern; }; class wxCairoFontData : public wxGraphicsObjectRefData { public: wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col ); ~wxCairoFontData(); virtual void Apply( wxGraphicsContext* context ); private : wxCharBuffer m_fontName; double m_size; cairo_font_slant_t m_slant; cairo_font_weight_t m_weight; double m_red; double m_green; double m_blue; double m_alpha; }; class wxCairoBitmapData : public wxGraphicsObjectRefData { public: wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp ); ~wxCairoBitmapData(); virtual cairo_surface_t* GetCairoSurface() { return m_surface; } virtual cairo_pattern_t* GetCairoPattern() { return m_pattern; } virtual wxSize GetSize() { return wxSize(m_width, m_height); } private : cairo_surface_t* m_surface; cairo_pattern_t* m_pattern; int m_width; int m_height; unsigned char* m_buffer; }; class WXDLLIMPEXP_CORE wxCairoContext : public wxGraphicsContext { DECLARE_NO_COPY_CLASS(wxCairoContext) public: wxCairoContext( wxGraphicsRenderer* renderer, const wxWindowDC& dc ); #ifdef __WXMSW__ wxCairoContext( wxGraphicsRenderer* renderer, HDC context ); #endif #ifdef __WXGTK__ wxCairoContext( wxGraphicsRenderer* renderer, GdkDrawable *drawable ); #endif wxCairoContext( wxGraphicsRenderer* renderer, cairo_t *context ); wxCairoContext( wxGraphicsRenderer* renderer, wxWindow *window); wxCairoContext(); virtual ~wxCairoContext(); virtual void Clip( const wxRegion ®ion ); // clips drawings to the rect virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h ); // resets the clipping to original extent virtual void ResetClip(); virtual void * GetNativeContext(); virtual void StrokePath( const wxGraphicsPath& p ); virtual void FillPath( const wxGraphicsPath& p , int fillStyle = wxWINDING_RULE ); virtual void Translate( wxDouble dx , wxDouble dy ); virtual void Scale( wxDouble xScale , wxDouble yScale ); virtual void Rotate( wxDouble angle ); // concatenates this transform with the current transform of this context virtual void ConcatTransform( const wxGraphicsMatrix& matrix ); // sets the transform of this context virtual void SetTransform( const wxGraphicsMatrix& matrix ); // gets the matrix of this context virtual wxGraphicsMatrix GetTransform() const; void DrawGraphicsBitmapInternal( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h ); 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 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; #ifdef __WXMSW__ cairo_surface_t* m_mswSurface; #endif }; //----------------------------------------------------------------------------- // wxCairoPenData implementation //----------------------------------------------------------------------------- wxCairoPenData::~wxCairoPenData() { delete[] m_userLengths; } void wxCairoPenData::Init() { m_lengths = NULL; m_userLengths = NULL; m_width = 0; m_count = 0; } wxCairoPenData::wxCairoPenData( wxGraphicsRenderer* renderer, const wxPen &pen ) : wxGraphicsObjectRefData(renderer) { Init(); m_pen = pen; m_width = m_pen.GetWidth(); if (m_width <= 0.0) m_width = 0.1; m_red = m_pen.GetColour().Red()/255.0; m_green = m_pen.GetColour().Green()/255.0; m_blue = m_pen.GetColour().Blue()/255.0; m_alpha = m_pen.GetColour().Alpha()/255.0; switch ( m_pen.GetCap() ) { case wxCAP_ROUND : m_cap = CAIRO_LINE_CAP_ROUND; break; case wxCAP_PROJECTING : m_cap = CAIRO_LINE_CAP_SQUARE; break; case wxCAP_BUTT : m_cap = CAIRO_LINE_CAP_BUTT; break; default : m_cap = CAIRO_LINE_CAP_BUTT; break; } switch ( m_pen.GetJoin() ) { case wxJOIN_BEVEL : m_join = CAIRO_LINE_JOIN_BEVEL; break; case wxJOIN_MITER : m_join = CAIRO_LINE_JOIN_MITER; break; case wxJOIN_ROUND : m_join = CAIRO_LINE_JOIN_ROUND; break; default : m_join = CAIRO_LINE_JOIN_MITER; break; } const double dashUnit = m_width < 1.0 ? 1.0 : m_width; const double dotted[] = { dashUnit , dashUnit + 2.0 }; static const double short_dashed[] = { 9.0 , 6.0 }; static const double dashed[] = { 19.0 , 9.0 }; static const double dotted_dashed[] = { 9.0 , 6.0 , 3.0 , 3.0 }; switch ( m_pen.GetStyle() ) { case wxSOLID : break; case wxDOT : m_count = WXSIZEOF(dotted); m_userLengths = new double[ m_count ] ; memcpy( m_userLengths, dotted, sizeof(dotted) ); m_lengths = m_userLengths; break; case wxLONG_DASH : m_lengths = dotted ; m_count = WXSIZEOF(dashed); break; case wxSHORT_DASH : m_lengths = dotted ; m_count = WXSIZEOF(short_dashed); break; case wxDOT_DASH : m_lengths = dotted ; m_count = WXSIZEOF(dotted_dashed); break; case wxUSER_DASH : { wxDash *wxdashes ; m_count = m_pen.GetDashes( &wxdashes ) ; if ((wxdashes != NULL) && (m_count > 0)) { m_userLengths = new double[m_count] ; for ( int i = 0 ; i < m_count ; ++i ) { m_userLengths[i] = wxdashes[i] * dashUnit ; if ( i % 2 == 1 && m_userLengths[i] < dashUnit + 2.0 ) m_userLengths[i] = dashUnit + 2.0 ; else if ( i % 2 == 0 && m_userLengths[i] < dashUnit ) m_userLengths[i] = dashUnit ; } } m_lengths = m_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; } } void wxCairoPenData::Apply( wxGraphicsContext* context ) { cairo_t * ctext = (cairo_t*) context->GetNativeContext(); cairo_set_line_width(ctext,m_width); cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha); cairo_set_line_cap(ctext,m_cap); cairo_set_line_join(ctext,m_join); cairo_set_dash(ctext,(double*)m_lengths,m_count,0.0); } //----------------------------------------------------------------------------- // wxCairoBrushData implementation //----------------------------------------------------------------------------- wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer ) : wxGraphicsObjectRefData( renderer ) { Init(); } wxCairoBrushData::wxCairoBrushData( wxGraphicsRenderer* renderer, const wxBrush &brush ) : wxGraphicsObjectRefData(renderer) { Init(); m_red = brush.GetColour().Red()/255.0; m_green = brush.GetColour().Green()/255.0; m_blue = brush.GetColour().Blue()/255.0; m_alpha = brush.GetColour().Alpha()/255.0; /* 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); } } */ } wxCairoBrushData::~wxCairoBrushData () { if (m_brushPattern) cairo_pattern_destroy(m_brushPattern); } void wxCairoBrushData::Apply( wxGraphicsContext* context ) { cairo_t * ctext = (cairo_t*) context->GetNativeContext(); if ( m_brushPattern ) { cairo_set_source(ctext,m_brushPattern); } else { cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha); } } void wxCairoBrushData::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2 ) { 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 wxCairoBrushData::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius, const wxColour &oColor, const wxColour &cColor ) { 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 wxCairoBrushData::Init() { m_brushPattern = NULL; } //----------------------------------------------------------------------------- // wxCairoFontData implementation //----------------------------------------------------------------------------- wxCairoFontData::wxCairoFontData( wxGraphicsRenderer* renderer, const wxFont &font, const wxColour& col ) : wxGraphicsObjectRefData(renderer) { m_red = col.Red()/255.0; m_green = col.Green()/255.0; m_blue = col.Blue()/255.0; m_alpha = col.Alpha()/255.0; m_size = font.GetPointSize(); m_fontName = font.GetFaceName().mb_str(wxConvUTF8); m_slant = font.GetStyle() == wxFONTSTYLE_ITALIC ? CAIRO_FONT_SLANT_ITALIC:CAIRO_FONT_SLANT_NORMAL; m_weight = font.GetWeight() == wxFONTWEIGHT_BOLD ? CAIRO_FONT_WEIGHT_BOLD:CAIRO_FONT_WEIGHT_NORMAL; } wxCairoFontData::~wxCairoFontData() { } void wxCairoFontData::Apply( wxGraphicsContext* context ) { cairo_t * ctext = (cairo_t*) context->GetNativeContext(); cairo_set_source_rgba(ctext,m_red,m_green, m_blue,m_alpha); cairo_select_font_face(ctext,m_fontName,m_slant,m_weight); cairo_set_font_size(ctext,m_size); // TODO UNDERLINE // TODO FIX SIZE } //----------------------------------------------------------------------------- // wxCairoPathData implementation //----------------------------------------------------------------------------- wxCairoPathData::wxCairoPathData( wxGraphicsRenderer* renderer, cairo_t* pathcontext) : wxGraphicsPathData(renderer) { if (pathcontext) { m_pathContext = pathcontext; } else { cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1); m_pathContext = cairo_create(surface); cairo_surface_destroy (surface); } } wxCairoPathData::~wxCairoPathData() { cairo_destroy(m_pathContext); } wxGraphicsObjectRefData *wxCairoPathData::Clone() const { cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,1,1); cairo_t* pathcontext = cairo_create(surface); cairo_surface_destroy (surface); cairo_path_t* path = cairo_copy_path(m_pathContext); cairo_append_path(pathcontext, path); cairo_path_destroy(path); return new wxCairoPathData( GetRenderer() ,pathcontext); } void* wxCairoPathData::GetNativePath() const { return cairo_copy_path(m_pathContext) ; } void wxCairoPathData::UnGetNativePath(void *p) const { cairo_path_destroy((cairo_path_t*)p); } // // The Primitives // void wxCairoPathData::MoveToPoint( wxDouble x , wxDouble y ) { cairo_move_to(m_pathContext,x,y); } void wxCairoPathData::AddLineToPoint( wxDouble x , wxDouble y ) { cairo_line_to(m_pathContext,x,y); } void wxCairoPathData::AddPath( const wxGraphicsPathData* path ) { cairo_path_t* p = (cairo_path_t*)path->GetNativePath(); cairo_append_path(m_pathContext, p); UnGetNativePath(p); } void wxCairoPathData::CloseSubpath() { cairo_close_path(m_pathContext); } void wxCairoPathData::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 wxCairoPathData::GetCurrentPoint( wxDouble* x, wxDouble* y) const { double dx,dy; cairo_get_current_point(m_pathContext,&dx,&dy); if (x) *x = dx; if (y) *y = dy; } void wxCairoPathData::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); } // transforms each point of this path by the matrix void wxCairoPathData::Transform( const wxGraphicsMatrixData* matrix ) { // as we don't have a true path object, we have to apply the inverse // matrix to the context cairo_matrix_t m = *((cairo_matrix_t*) matrix->GetNativeMatrix()); cairo_matrix_invert( &m ); cairo_transform(m_pathContext,&m); } // gets the bounding box enclosing all points (possibly including control points) void wxCairoPathData::GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const { double x1,y1,x2,y2; cairo_stroke_extents( m_pathContext, &x1, &y1, &x2, &y2 ); if ( x2 < x1 ) { *x = x2; *w = x1-x2; } else { *x = x1; *w = x2-x1; } if( y2 < y1 ) { *y = y2; *h = y1-y2; } else { *y = y1; *h = y2-y1; } } bool wxCairoPathData::Contains( wxDouble x, wxDouble y, int fillStyle ) const { return cairo_in_stroke( m_pathContext, x, y) != 0; } //----------------------------------------------------------------------------- // wxCairoMatrixData implementation //----------------------------------------------------------------------------- wxCairoMatrixData::wxCairoMatrixData(wxGraphicsRenderer* renderer, const cairo_matrix_t* matrix ) : wxGraphicsMatrixData(renderer) { if ( matrix ) m_matrix = *matrix; } wxCairoMatrixData::~wxCairoMatrixData() { // nothing to do } wxGraphicsObjectRefData *wxCairoMatrixData::Clone() const { return new wxCairoMatrixData(GetRenderer(),&m_matrix); } // concatenates the matrix void wxCairoMatrixData::Concat( const wxGraphicsMatrixData *t ) { cairo_matrix_multiply( &m_matrix, &m_matrix, (cairo_matrix_t*) t->GetNativeMatrix()); } // sets the matrix to the respective values void wxCairoMatrixData::Set(wxDouble a, wxDouble b, wxDouble c, wxDouble d, wxDouble tx, wxDouble ty) { cairo_matrix_init( &m_matrix, a, b, c, d, tx, ty); } // gets the component valuess of the matrix void wxCairoMatrixData::Get(wxDouble* a, wxDouble* b, wxDouble* c, wxDouble* d, wxDouble* tx, wxDouble* ty) const { if (a) *a = m_matrix.xx; if (b) *b = m_matrix.yx; if (c) *c = m_matrix.xy; if (d) *d = m_matrix.yy; if (tx) *tx= m_matrix.x0; if (ty) *ty= m_matrix.y0; } // makes this the inverse matrix void wxCairoMatrixData::Invert() { cairo_matrix_invert( &m_matrix ); } // returns true if the elements of the transformation matrix are equal ? bool wxCairoMatrixData::IsEqual( const wxGraphicsMatrixData* t) const { const cairo_matrix_t* tm = (cairo_matrix_t*) t->GetNativeMatrix(); return ( m_matrix.xx == tm->xx && m_matrix.yx == tm->yx && m_matrix.xy == tm->xy && m_matrix.yy == tm->yy && m_matrix.x0 == tm->x0 && m_matrix.y0 == tm->y0 ) ; } // return true if this is the identity matrix bool wxCairoMatrixData::IsIdentity() const { return ( m_matrix.xx == 1 && m_matrix.yy == 1 && m_matrix.yx == 0 && m_matrix.xy == 0 && m_matrix.x0 == 0 && m_matrix.y0 == 0); } // // transformation // // add the translation to this matrix void wxCairoMatrixData::Translate( wxDouble dx , wxDouble dy ) { cairo_matrix_translate( &m_matrix, dx, dy) ; } // add the scale to this matrix void wxCairoMatrixData::Scale( wxDouble xScale , wxDouble yScale ) { cairo_matrix_scale( &m_matrix, xScale, yScale) ; } // add the rotation to this matrix (radians) void wxCairoMatrixData::Rotate( wxDouble angle ) { cairo_matrix_rotate( &m_matrix, angle) ; } // // apply the transforms // // applies that matrix to the point void wxCairoMatrixData::TransformPoint( wxDouble *x, wxDouble *y ) const { double lx = *x, ly = *y ; cairo_matrix_transform_point( &m_matrix, &lx, &ly); *x = lx; *y = ly; } // applies the matrix except for translations void wxCairoMatrixData::TransformDistance( wxDouble *dx, wxDouble *dy ) const { double lx = *dx, ly = *dy ; cairo_matrix_transform_distance( &m_matrix, &lx, &ly); *dx = lx; *dy = ly; } // returns the native representation void * wxCairoMatrixData::GetNativeMatrix() const { return (void*) &m_matrix; } //----------------------------------------------------------------------------- // wxCairoBitmap implementation //----------------------------------------------------------------------------- wxCairoBitmapData::wxCairoBitmapData( wxGraphicsRenderer* renderer, const wxBitmap& bmp ) : wxGraphicsObjectRefData( renderer ) { wxCHECK_RET( bmp.IsOk(), wxT("Invalid bitmap in wxCairoContext::DrawBitmap")); int bw = m_width = bmp.GetWidth(); int bh = m_height = bmp.GetHeight(); wxBitmap bmpSource = bmp; // we need a non-const instance m_buffer = new unsigned char[bw*bh*4]; wxUint32* data = (wxUint32*)m_buffer; // Create a surface object and copy the bitmap pixel data to it. if the // image has alpha (or a mask represented as alpha) then we'll use a // different format and iterator than if it doesn't... if (bmpSource.HasAlpha() || bmpSource.GetMask()) { m_surface = cairo_image_surface_create_for_data( m_buffer, CAIRO_FORMAT_ARGB32, bw, bh, bw*4); wxAlphaPixelData pixData(bmpSource, wxPoint(0,0), wxSize(bw, bh)); wxCHECK_RET( pixData, wxT("Failed to gain raw access to bitmap data.")); wxAlphaPixelData::Iterator p(pixData); for (int y=0; ym_wxwindow; // Some controls don't have m_wxwindow - like wxStaticBox, but the user // code should still be able to create wxClientDCs for them, so we will // use the parent window here then. if ( !widget ) { window = window->GetParent(); widget = window->m_wxwindow; } wxASSERT_MSG( widget, wxT("wxCairoContext needs a widget") ); GtkPizza *pizza = GTK_PIZZA( widget ); GdkDrawable* drawable = pizza->bin_window; m_context = gdk_cairo_create( drawable ) ; #endif #ifdef __WXMSW__ m_mswSurface = cairo_win32_surface_create((HDC)window->GetHandle()); m_context = cairo_create(m_mswSurface); #endif PushState(); PushState(); } wxCairoContext::~wxCairoContext() { if ( m_context ) { PopState(); PopState(); cairo_destroy(m_context); } #ifdef __WXMSW__ if ( m_mswSurface ) cairo_surface_destroy(m_mswSurface); #endif } void wxCairoContext::Clip( const wxRegion& region ) { // Create a path with all the rectangles in the region wxGraphicsPath path = GetRenderer()->CreatePath(); wxRegionIterator ri(region); while (ri) { path.AddRectangle(ri.GetX(), ri.GetY(), ri.GetW(), ri.GetH()); ri++; } // Put it in the context cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ; cairo_append_path(m_context, cp); // clip to that path cairo_clip(m_context); path.UnGetNativePath(cp); } void wxCairoContext::Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) { // Create a path with this rectangle wxGraphicsPath path = GetRenderer()->CreatePath(); path.AddRectangle(x,y,w,h); // Put it in the context cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ; cairo_append_path(m_context, cp); // clip to that path cairo_clip(m_context); path.UnGetNativePath(cp); } void wxCairoContext::ResetClip() { cairo_reset_clip(m_context); } void wxCairoContext::StrokePath( const wxGraphicsPath& path ) { if ( !m_pen.IsNull() ) { cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ; cairo_append_path(m_context,cp); ((wxCairoPenData*)m_pen.GetRefData())->Apply(this); cairo_stroke(m_context); path.UnGetNativePath(cp); } } void wxCairoContext::FillPath( const wxGraphicsPath& path , int fillStyle ) { if ( !m_brush.IsNull() ) { cairo_path_t* cp = (cairo_path_t*) path.GetNativePath() ; cairo_append_path(m_context,cp); ((wxCairoBrushData*)m_brush.GetRefData())->Apply(this); cairo_set_fill_rule(m_context,fillStyle==wxODDEVEN_RULE ? CAIRO_FILL_RULE_EVEN_ODD : CAIRO_FILL_RULE_WINDING); cairo_fill(m_context); path.UnGetNativePath(cp); } } 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); } // concatenates this transform with the current transform of this context void wxCairoContext::ConcatTransform( const wxGraphicsMatrix& matrix ) { cairo_transform(m_context,(const cairo_matrix_t *) matrix.GetNativeMatrix()); } // sets the transform of this context void wxCairoContext::SetTransform( const wxGraphicsMatrix& matrix ) { cairo_set_matrix(m_context,(const cairo_matrix_t*) matrix.GetNativeMatrix()); } // gets the matrix of this context wxGraphicsMatrix wxCairoContext::GetTransform() const { wxGraphicsMatrix matrix = CreateMatrix(); cairo_get_matrix(m_context,(cairo_matrix_t*) matrix.GetNativeMatrix()); return matrix; } void wxCairoContext::PushState() { cairo_save(m_context); } void wxCairoContext::PopState() { cairo_restore(m_context); } void wxGraphicsContext::DrawGraphicsBitmap(const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h) { static_cast(this)->DrawGraphicsBitmapInternal(bmp, x, y, w, h); } void wxCairoContext::DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) { wxGraphicsBitmap bitmap = GetRenderer()->CreateBitmap(bmp); DrawGraphicsBitmapInternal(bitmap, x, y, w, h); } void wxCairoContext::DrawGraphicsBitmapInternal(const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) { wxCairoBitmapData* data = static_cast(bmp.GetRefData()); cairo_pattern_t* pattern = data->GetCairoPattern(); wxSize size = data->GetSize(); PushState(); // prepare to draw the image cairo_translate(m_context, x, y); // In case we're scaling the image by using a width and height different // than the bitmap's size create a pattern transformation on the surface and // draw the transformed pattern. wxDouble scaleX = w / size.GetWidth(); wxDouble scaleY = h / size.GetHeight(); cairo_scale(m_context, scaleX, scaleY); cairo_set_source(m_context, pattern); // use the original size here since the context is scaled already... cairo_rectangle(m_context, 0, 0, size.GetWidth(), size.GetHeight()); // fill the rectangle using the pattern cairo_fill(m_context); // clean up PopState(); } void wxCairoContext::DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) { // An icon is a bitmap on wxGTK, so do this the easy way. When we want to // start using the Cairo backend on other platforms then we may need to // fiddle with this... DrawBitmap(icon, x, y, w, h); } void wxCairoContext::DrawText( const wxString &str, wxDouble x, wxDouble y ) { wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::DrawText - no valid font set") ); if ( str.empty()) return; ((wxCairoFontData*)m_font.GetRefData())->Apply(this); // Cairo's x,y for drawing text is at the baseline, so we need to adjust // the position we move to by the ascent. cairo_font_extents_t fe; cairo_font_extents(m_context, &fe); cairo_move_to(m_context, x, y+fe.ascent); const wxWX2MBbuf buf(str.mb_str(wxConvUTF8)); cairo_show_text(m_context,buf); } void wxCairoContext::GetTextExtent( const wxString &str, wxDouble *width, wxDouble *height, wxDouble *descent, wxDouble *externalLeading ) const { wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetTextExtent - no valid font set") ); if ( str.empty()) return; ((wxCairoFontData*)m_font.GetRefData())->Apply((wxCairoContext*)this); if (width) { const wxWX2MBbuf buf(str.mb_str(wxConvUTF8)); cairo_text_extents_t te; cairo_text_extents(m_context, buf, &te); *width = te.width; } if (height || descent || externalLeading) { cairo_font_extents_t fe; cairo_font_extents(m_context, &fe); if (height) *height = fe.height; if ( descent ) *descent = fe.descent; if ( externalLeading ) *externalLeading = wxMax(0, fe.height - (fe.ascent + fe.descent)); } } void wxCairoContext::GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const { widths.Empty(); widths.Add(0, text.length()); wxCHECK_RET( !m_font.IsNull(), wxT("wxCairoContext::GetPartialTextExtents - no valid font set") ); if (text.empty()) return; // TODO } void * wxCairoContext::GetNativeContext() { return m_context; } //----------------------------------------------------------------------------- // wxCairoRenderer declaration //----------------------------------------------------------------------------- class WXDLLIMPEXP_CORE wxCairoRenderer : public wxGraphicsRenderer { public : wxCairoRenderer() {} virtual ~wxCairoRenderer() {} // Context virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc); #ifdef __WXMSW__ virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc); #endif virtual wxGraphicsContext * CreateContextFromNativeContext( void * context ); virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window ); virtual wxGraphicsContext * CreateContext( wxWindow* window ); virtual wxGraphicsContext * CreateMeasuringContext(); // Path virtual wxGraphicsPath CreatePath(); // Matrix virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0, wxDouble tx=0.0, wxDouble ty=0.0); virtual wxGraphicsPen CreatePen(const wxPen& pen) ; 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) ; // 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) ; // sets the font virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) ; wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap ) ; private : DECLARE_DYNAMIC_CLASS_NO_COPY(wxCairoRenderer) } ; //----------------------------------------------------------------------------- // wxCairoRenderer implementation //----------------------------------------------------------------------------- IMPLEMENT_DYNAMIC_CLASS(wxCairoRenderer,wxGraphicsRenderer) static wxCairoRenderer gs_cairoGraphicsRenderer; #ifdef __WXGTK__ wxGraphicsRenderer* wxGraphicsRenderer::GetDefaultRenderer() { return &gs_cairoGraphicsRenderer; } #endif wxGraphicsContext * wxCairoRenderer::CreateContext( const wxWindowDC& dc) { return new wxCairoContext(this,dc); } #ifdef __WXMSW__ wxGraphicsContext * wxCairoRenderer::CreateContext( const wxMemoryDC& dc) { return NULL; } #endif wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeContext( void * context ) { #if __WXMSW__ return new wxCairoContext(this,(HDC)context); #endif #if __WXGTK__ return new wxCairoContext(this,(cairo_t*)context); #endif } wxGraphicsContext * wxCairoRenderer::CreateContextFromNativeWindow( void * window ) { #ifdef __WXGTK__ return new wxCairoContext(this,(GdkDrawable*)window); #else return NULL; #endif } wxGraphicsContext * wxCairoRenderer::CreateMeasuringContext() { #ifdef __WXGTK__ return CreateContextFromNativeWindow(gdk_get_default_root_window()); #endif return NULL; // TODO } wxGraphicsContext * wxCairoRenderer::CreateContext( wxWindow* window ) { return new wxCairoContext(this, window ); } // Path wxGraphicsPath wxCairoRenderer::CreatePath() { wxGraphicsPath path; path.SetRefData( new wxCairoPathData(this) ); return path; } // Matrix wxGraphicsMatrix wxCairoRenderer::CreateMatrix( wxDouble a, wxDouble b, wxDouble c, wxDouble d, wxDouble tx, wxDouble ty) { wxGraphicsMatrix m; wxCairoMatrixData* data = new wxCairoMatrixData( this ); data->Set( a,b,c,d,tx,ty ) ; m.SetRefData(data); return m; } wxGraphicsPen wxCairoRenderer::CreatePen(const wxPen& pen) { if ( !pen.Ok() || pen.GetStyle() == wxTRANSPARENT ) return wxNullGraphicsPen; else { wxGraphicsPen p; p.SetRefData(new wxCairoPenData( this, pen )); return p; } } wxGraphicsBrush wxCairoRenderer::CreateBrush(const wxBrush& brush ) { if ( !brush.Ok() || brush.GetStyle() == wxTRANSPARENT ) return wxNullGraphicsBrush; else { wxGraphicsBrush p; p.SetRefData(new wxCairoBrushData( this, brush )); return p; } } // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2 wxGraphicsBrush wxCairoRenderer::CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2, const wxColour&c1, const wxColour&c2) { wxGraphicsBrush p; wxCairoBrushData* d = new wxCairoBrushData( this ); d->CreateLinearGradientBrush(x1, y1, x2, y2, c1, c2); 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 wxCairoRenderer::CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius, const wxColour &oColor, const wxColour &cColor) { wxGraphicsBrush p; wxCairoBrushData* d = new wxCairoBrushData( this ); d->CreateRadialGradientBrush(xo,yo,xc,yc,radius,oColor,cColor); p.SetRefData(d); return p; } // sets the font wxGraphicsFont wxCairoRenderer::CreateFont( const wxFont &font , const wxColour &col ) { if ( font.Ok() ) { wxGraphicsFont p; p.SetRefData(new wxCairoFontData( this , font, col )); return p; } else return wxNullGraphicsFont; } wxGraphicsBitmap wxGraphicsRenderer::CreateBitmap( const wxBitmap& bmp ) { if ( bmp.Ok() ) { wxGraphicsBitmap p; p.SetRefData(new wxCairoBitmapData( this , bmp )); return p; } else return wxNullGraphicsBitmap; } #endif // wxUSE_CAIRO wxGraphicsRenderer* wxGraphicsRenderer::GetCairoRenderer() { #if wxUSE_CAIRO return &gs_cairoGraphicsRenderer; #else return NULL; #endif } #endif // wxUSE_GRAPHICS_CONTEXT