889 lines
30 KiB
C++
889 lines
30 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: wx/graphics.h
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// Purpose: graphics context header
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// Author: Stefan Csomor
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// Modified by:
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// Created:
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// Copyright: (c) Stefan Csomor
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_GRAPHICS_H_
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#define _WX_GRAPHICS_H_
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#include "wx/defs.h"
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#if wxUSE_GRAPHICS_CONTEXT
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#include "wx/geometry.h"
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#include "wx/dynarray.h"
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#include "wx/dc.h"
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#include "wx/image.h"
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#include "wx/vector.h"
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enum wxAntialiasMode
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{
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wxANTIALIAS_NONE, // should be 0
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wxANTIALIAS_DEFAULT
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};
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enum wxInterpolationQuality
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{
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// default interpolation
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wxINTERPOLATION_DEFAULT,
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// no interpolation
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wxINTERPOLATION_NONE,
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// fast interpolation, suited for interactivity
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wxINTERPOLATION_FAST,
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// better quality
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wxINTERPOLATION_GOOD,
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// best quality, not suited for interactivity
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wxINTERPOLATION_BEST
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};
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enum wxCompositionMode
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{
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// R = Result, S = Source, D = Destination, premultiplied with alpha
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// Ra, Sa, Da their alpha components
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// classic Porter-Duff compositions
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// http://keithp.com/~keithp/porterduff/p253-porter.pdf
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wxCOMPOSITION_INVALID = -1, /* indicates invalid/unsupported mode */
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wxCOMPOSITION_CLEAR, /* R = 0 */
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wxCOMPOSITION_SOURCE, /* R = S */
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wxCOMPOSITION_OVER, /* R = S + D*(1 - Sa) */
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wxCOMPOSITION_IN, /* R = S*Da */
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wxCOMPOSITION_OUT, /* R = S*(1 - Da) */
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wxCOMPOSITION_ATOP, /* R = S*Da + D*(1 - Sa) */
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wxCOMPOSITION_DEST, /* R = D, essentially a noop */
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wxCOMPOSITION_DEST_OVER, /* R = S*(1 - Da) + D */
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wxCOMPOSITION_DEST_IN, /* R = D*Sa */
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wxCOMPOSITION_DEST_OUT, /* R = D*(1 - Sa) */
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wxCOMPOSITION_DEST_ATOP, /* R = S*(1 - Da) + D*Sa */
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wxCOMPOSITION_XOR, /* R = S*(1 - Da) + D*(1 - Sa) */
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// mathematical compositions
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wxCOMPOSITION_ADD /* R = S + D */
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};
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class WXDLLIMPEXP_FWD_CORE wxWindowDC;
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class WXDLLIMPEXP_FWD_CORE wxMemoryDC;
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#if wxUSE_PRINTING_ARCHITECTURE
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class WXDLLIMPEXP_FWD_CORE wxPrinterDC;
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#endif
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#ifdef __WXMSW__
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#if wxUSE_ENH_METAFILE
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class WXDLLIMPEXP_FWD_CORE wxEnhMetaFileDC;
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#endif
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#endif
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class WXDLLIMPEXP_FWD_CORE wxGraphicsContext;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsPath;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsMatrix;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsFigure;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsRenderer;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsPen;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsBrush;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsFont;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsBitmap;
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/*
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* notes about the graphics context apis
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*
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* angles : are measured in radians, 0.0 being in direction of positiv x axis, PI/2 being
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* in direction of positive y axis.
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*/
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// Base class of all objects used for drawing in the new graphics API, the always point back to their
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// originating rendering engine, there is no dynamic unloading of a renderer currently allowed,
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// these references are not counted
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//
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// The data used by objects like graphics pens etc is ref counted, in order to avoid unnecessary expensive
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// duplication. Any operation on a shared instance that results in a modified state, uncouples this
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// instance from the other instances that were shared - using copy on write semantics
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//
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class WXDLLIMPEXP_FWD_CORE wxGraphicsObjectRefData;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsBitmapData;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsMatrixData;
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class WXDLLIMPEXP_FWD_CORE wxGraphicsPathData;
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class WXDLLIMPEXP_CORE wxGraphicsObject : public wxObject
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{
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public:
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wxGraphicsObject();
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wxGraphicsObject( wxGraphicsRenderer* renderer );
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virtual ~wxGraphicsObject();
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bool IsNull() const;
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// returns the renderer that was used to create this instance, or NULL if it has not been initialized yet
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wxGraphicsRenderer* GetRenderer() const;
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wxGraphicsObjectRefData* GetGraphicsData() const;
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protected:
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virtual wxObjectRefData* CreateRefData() const;
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virtual wxObjectRefData* CloneRefData(const wxObjectRefData* data) const;
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DECLARE_DYNAMIC_CLASS(wxGraphicsObject)
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};
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class WXDLLIMPEXP_CORE wxGraphicsPen : public wxGraphicsObject
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{
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public:
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wxGraphicsPen() {}
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virtual ~wxGraphicsPen() {}
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private:
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DECLARE_DYNAMIC_CLASS(wxGraphicsPen)
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};
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extern WXDLLIMPEXP_DATA_CORE(wxGraphicsPen) wxNullGraphicsPen;
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class WXDLLIMPEXP_CORE wxGraphicsBrush : public wxGraphicsObject
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{
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public:
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wxGraphicsBrush() {}
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virtual ~wxGraphicsBrush() {}
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private:
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DECLARE_DYNAMIC_CLASS(wxGraphicsBrush)
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};
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extern WXDLLIMPEXP_DATA_CORE(wxGraphicsBrush) wxNullGraphicsBrush;
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class WXDLLIMPEXP_CORE wxGraphicsFont : public wxGraphicsObject
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{
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public:
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wxGraphicsFont() {}
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virtual ~wxGraphicsFont() {}
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private:
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DECLARE_DYNAMIC_CLASS(wxGraphicsFont)
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};
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extern WXDLLIMPEXP_DATA_CORE(wxGraphicsFont) wxNullGraphicsFont;
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class WXDLLIMPEXP_CORE wxGraphicsBitmap : public wxGraphicsObject
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{
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public:
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wxGraphicsBitmap() {}
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virtual ~wxGraphicsBitmap() {}
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// Convert bitmap to wxImage: this is more efficient than converting to
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// wxBitmap first and then to wxImage and also works without X server
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// connection under Unix that wxBitmap requires.
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#if wxUSE_IMAGE
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wxImage ConvertToImage() const;
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#endif // wxUSE_IMAGE
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void* GetNativeBitmap() const;
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const wxGraphicsBitmapData* GetBitmapData() const
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{ return (const wxGraphicsBitmapData*) GetRefData(); }
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wxGraphicsBitmapData* GetBitmapData()
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{ return (wxGraphicsBitmapData*) GetRefData(); }
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private:
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DECLARE_DYNAMIC_CLASS(wxGraphicsBitmap)
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};
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extern WXDLLIMPEXP_DATA_CORE(wxGraphicsBitmap) wxNullGraphicsBitmap;
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class WXDLLIMPEXP_CORE wxGraphicsMatrix : public wxGraphicsObject
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{
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public:
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wxGraphicsMatrix() {}
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virtual ~wxGraphicsMatrix() {}
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// concatenates the matrix
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virtual void Concat( const wxGraphicsMatrix *t );
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void Concat( const wxGraphicsMatrix &t ) { Concat( &t ); }
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// sets the matrix to the respective values
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virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
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wxDouble tx=0.0, wxDouble ty=0.0);
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// gets the component valuess of the matrix
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virtual void Get(wxDouble* a=NULL, wxDouble* b=NULL, wxDouble* c=NULL,
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wxDouble* d=NULL, wxDouble* tx=NULL, wxDouble* ty=NULL) const;
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// makes this the inverse matrix
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virtual void Invert();
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// returns true if the elements of the transformation matrix are equal ?
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virtual bool IsEqual( const wxGraphicsMatrix* t) const;
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bool IsEqual( const wxGraphicsMatrix& t) const { return IsEqual( &t ); }
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// return true if this is the identity matrix
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virtual bool IsIdentity() const;
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//
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// transformation
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//
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// add the translation to this matrix
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virtual void Translate( wxDouble dx , wxDouble dy );
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// add the scale to this matrix
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virtual void Scale( wxDouble xScale , wxDouble yScale );
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// add the rotation to this matrix (radians)
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virtual void Rotate( wxDouble angle );
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//
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// apply the transforms
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//
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// applies that matrix to the point
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virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
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// applies the matrix except for translations
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virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
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// returns the native representation
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virtual void * GetNativeMatrix() const;
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const wxGraphicsMatrixData* GetMatrixData() const
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{ return (const wxGraphicsMatrixData*) GetRefData(); }
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wxGraphicsMatrixData* GetMatrixData()
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{ return (wxGraphicsMatrixData*) GetRefData(); }
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private:
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DECLARE_DYNAMIC_CLASS(wxGraphicsMatrix)
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};
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extern WXDLLIMPEXP_DATA_CORE(wxGraphicsMatrix) wxNullGraphicsMatrix;
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class WXDLLIMPEXP_CORE wxGraphicsPath : public wxGraphicsObject
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{
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public:
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wxGraphicsPath() {}
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virtual ~wxGraphicsPath() {}
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//
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// These are the path primitives from which everything else can be constructed
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//
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// begins a new subpath at (x,y)
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virtual void MoveToPoint( wxDouble x, wxDouble y );
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void MoveToPoint( const wxPoint2DDouble& p);
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// adds a straight line from the current point to (x,y)
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virtual void AddLineToPoint( wxDouble x, wxDouble y );
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void AddLineToPoint( const wxPoint2DDouble& p);
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// adds a cubic Bezier curve from the current point, using two control points and an end point
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virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y );
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void AddCurveToPoint( const wxPoint2DDouble& c1, const wxPoint2DDouble& c2, const wxPoint2DDouble& e);
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// adds another path
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virtual void AddPath( const wxGraphicsPath& path );
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// closes the current sub-path
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virtual void CloseSubpath();
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// gets the last point of the current path, (0,0) if not yet set
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virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
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wxPoint2DDouble GetCurrentPoint() const;
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// adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
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virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise );
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void AddArc( const wxPoint2DDouble& c, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise);
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//
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// These are convenience functions which - if not available natively will be assembled
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// using the primitives from above
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//
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// adds a quadratic Bezier curve from the current point, using a control point and an end point
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virtual void AddQuadCurveToPoint( wxDouble cx, wxDouble cy, wxDouble x, wxDouble y );
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// appends a rectangle as a new closed subpath
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virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
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// appends an ellipsis as a new closed subpath fitting the passed rectangle
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virtual void AddCircle( wxDouble x, wxDouble y, wxDouble r );
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// appends 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)
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virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r );
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// appends an ellipse
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virtual void AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
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// appends a rounded rectangle
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virtual void AddRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);
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// returns the native path
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virtual void * GetNativePath() const;
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// give the native path returned by GetNativePath() back (there might be some deallocations necessary)
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virtual void UnGetNativePath(void *p)const;
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// transforms each point of this path by the matrix
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virtual void Transform( const wxGraphicsMatrix& matrix );
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// gets the bounding box enclosing all points (possibly including control points)
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virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h)const;
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wxRect2DDouble GetBox()const;
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virtual bool Contains( wxDouble x, wxDouble y, wxPolygonFillMode fillStyle = wxODDEVEN_RULE)const;
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bool Contains( const wxPoint2DDouble& c, wxPolygonFillMode fillStyle = wxODDEVEN_RULE)const;
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const wxGraphicsPathData* GetPathData() const
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{ return (const wxGraphicsPathData*) GetRefData(); }
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wxGraphicsPathData* GetPathData()
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{ return (wxGraphicsPathData*) GetRefData(); }
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private:
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DECLARE_DYNAMIC_CLASS(wxGraphicsPath)
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};
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extern WXDLLIMPEXP_DATA_CORE(wxGraphicsPath) wxNullGraphicsPath;
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// Describes a single gradient stop.
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class wxGraphicsGradientStop
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{
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public:
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wxGraphicsGradientStop(wxColour col = wxTransparentColour,
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float pos = 0.)
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: m_col(col),
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m_pos(pos)
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{
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}
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// default copy ctor, assignment operator and dtor are ok
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const wxColour& GetColour() const { return m_col; }
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void SetColour(const wxColour& col) { m_col = col; }
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float GetPosition() const { return m_pos; }
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void SetPosition(float pos)
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{
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wxASSERT_MSG( pos >= 0 && pos <= 1, "invalid gradient stop position" );
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m_pos = pos;
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}
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private:
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// The colour of this gradient band.
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wxColour m_col;
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// Its starting position: 0 is the beginning and 1 is the end.
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float m_pos;
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};
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// A collection of gradient stops ordered by their positions (from lowest to
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// highest). The first stop (index 0, position 0.0) is always the starting
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// colour and the last one (index GetCount() - 1, position 1.0) is the end
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// colour.
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class WXDLLIMPEXP_CORE wxGraphicsGradientStops
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{
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public:
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wxGraphicsGradientStops(wxColour startCol = wxTransparentColour,
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wxColour endCol = wxTransparentColour)
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{
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// we can't use Add() here as it relies on having start/end stops as
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// first/last array elements so do it manually
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m_stops.push_back(wxGraphicsGradientStop(startCol, 0.f));
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m_stops.push_back(wxGraphicsGradientStop(endCol, 1.f));
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}
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// default copy ctor, assignment operator and dtor are ok for this class
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// Add a stop in correct order.
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void Add(const wxGraphicsGradientStop& stop);
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void Add(wxColour col, float pos) { Add(wxGraphicsGradientStop(col, pos)); }
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// Get the number of stops.
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size_t GetCount() const { return m_stops.size(); }
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// Return the stop at the given index (which must be valid).
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wxGraphicsGradientStop Item(unsigned n) const { return m_stops.at(n); }
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// Get/set start and end colours.
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void SetStartColour(wxColour col)
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{ m_stops[0].SetColour(col); }
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wxColour GetStartColour() const
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{ return m_stops[0].GetColour(); }
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void SetEndColour(wxColour col)
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{ m_stops[m_stops.size() - 1].SetColour(col); }
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wxColour GetEndColour() const
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{ return m_stops[m_stops.size() - 1].GetColour(); }
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private:
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// All the stops stored in ascending order of positions.
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wxVector<wxGraphicsGradientStop> m_stops;
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};
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class WXDLLIMPEXP_CORE wxGraphicsContext : public wxGraphicsObject
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{
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public:
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wxGraphicsContext(wxGraphicsRenderer* renderer);
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virtual ~wxGraphicsContext();
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static wxGraphicsContext* Create( const wxWindowDC& dc);
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static wxGraphicsContext * Create( const wxMemoryDC& dc);
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#if wxUSE_PRINTING_ARCHITECTURE
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static wxGraphicsContext * Create( const wxPrinterDC& dc);
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#endif
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#ifdef __WXMSW__
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#if wxUSE_ENH_METAFILE
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static wxGraphicsContext * Create( const wxEnhMetaFileDC& dc);
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#endif
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#endif
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static wxGraphicsContext* CreateFromNative( void * context );
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static wxGraphicsContext* CreateFromNativeWindow( void * window );
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static wxGraphicsContext* Create( wxWindow* window );
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#if wxUSE_IMAGE
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// Create a context for drawing onto a wxImage. The image life time must be
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// greater than that of the context itself as when the context is destroyed
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// it will copy its contents to the specified image.
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static wxGraphicsContext* Create(wxImage& image);
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#endif // wxUSE_IMAGE
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// create a context that can be used for measuring texts only, no drawing allowed
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static wxGraphicsContext * Create();
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// begin a new document (relevant only for printing / pdf etc) if there is a progress dialog, message will be shown
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virtual bool StartDoc( const wxString& message );
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// done with that document (relevant only for printing / pdf etc)
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virtual void EndDoc();
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// opens a new page (relevant only for printing / pdf etc) with the given size in points
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// (if both are null the default page size will be used)
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virtual void StartPage( wxDouble width = 0, wxDouble height = 0 );
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// ends the current page (relevant only for printing / pdf etc)
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virtual void EndPage();
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// make sure that the current content of this context is immediately visible
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virtual void Flush();
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wxGraphicsPath CreatePath() const;
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virtual wxGraphicsPen CreatePen(const wxPen& pen) const;
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virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) const;
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// sets the brush to a linear gradient, starting at (x1,y1) and ending at
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// (x2,y2) with the given boundary colours or the specified stops
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wxGraphicsBrush
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CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
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wxDouble x2, wxDouble y2,
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const wxColour& c1, const wxColour& c2) const;
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wxGraphicsBrush
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CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
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wxDouble x2, wxDouble y2,
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const wxGraphicsGradientStops& stops) const;
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// sets the brush to a radial gradient originating at (xo,yc) and ending
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// on a circle around (xc,yc) with the given radius; the colours may be
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// specified by just the two extremes or the full array of gradient stops
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wxGraphicsBrush
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CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
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wxDouble xc, wxDouble yc, wxDouble radius,
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const wxColour& oColor, const wxColour& cColor) const;
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wxGraphicsBrush
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CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
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wxDouble xc, wxDouble yc, wxDouble radius,
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const wxGraphicsGradientStops& stops) const;
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// creates a font
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virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) const;
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virtual wxGraphicsFont CreateFont(double sizeInPixels,
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const wxString& facename,
|
|
int flags = wxFONTFLAG_DEFAULT,
|
|
const wxColour& col = *wxBLACK) const;
|
|
|
|
// create a native bitmap representation
|
|
virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap ) const;
|
|
#if wxUSE_IMAGE
|
|
wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image) const;
|
|
#endif // wxUSE_IMAGE
|
|
|
|
// create a native bitmap representation
|
|
virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) const;
|
|
|
|
// create a 'native' matrix corresponding to these values
|
|
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) const;
|
|
|
|
wxGraphicsMatrix CreateMatrix( const wxAffineMatrix2DBase& mat ) const
|
|
{
|
|
wxMatrix2D mat2D;
|
|
wxPoint2DDouble tr;
|
|
mat.Get(&mat2D, &tr);
|
|
|
|
return CreateMatrix(mat2D.m_11, mat2D.m_12, mat2D.m_21, mat2D.m_22,
|
|
tr.m_x, tr.m_y);
|
|
}
|
|
|
|
// push the current state of the context, ie the transformation matrix on a stack
|
|
virtual void PushState() = 0;
|
|
|
|
// pops a stored state from the stack
|
|
virtual void PopState() = 0;
|
|
|
|
// clips drawings to the region intersected with the current clipping region
|
|
virtual void Clip( const wxRegion ®ion ) = 0;
|
|
|
|
// clips drawings to the rect intersected with the current clipping region
|
|
virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
|
|
|
|
// resets the clipping to original extent
|
|
virtual void ResetClip() = 0;
|
|
|
|
// returns the native context
|
|
virtual void * GetNativeContext() = 0;
|
|
|
|
// returns the current shape antialiasing mode
|
|
virtual wxAntialiasMode GetAntialiasMode() const { return m_antialias; }
|
|
|
|
// sets the antialiasing mode, returns true if it supported
|
|
virtual bool SetAntialiasMode(wxAntialiasMode antialias) = 0;
|
|
|
|
// returns the current interpolation quality
|
|
virtual wxInterpolationQuality GetInterpolationQuality() const { return m_interpolation; }
|
|
|
|
// sets the interpolation quality, returns true if it supported
|
|
virtual bool SetInterpolationQuality(wxInterpolationQuality interpolation) = 0;
|
|
|
|
// returns the current compositing operator
|
|
virtual wxCompositionMode GetCompositionMode() const { return m_composition; }
|
|
|
|
// sets the compositing operator, returns true if it supported
|
|
virtual bool SetCompositionMode(wxCompositionMode op) = 0;
|
|
|
|
// returns the size of the graphics context in device coordinates
|
|
void GetSize(wxDouble* width, wxDouble* height) const
|
|
{
|
|
if ( width )
|
|
*width = m_width;
|
|
if ( height )
|
|
*height = m_height;
|
|
}
|
|
|
|
// returns the resolution of the graphics context in device points per inch
|
|
virtual void GetDPI( wxDouble* dpiX, wxDouble* dpiY);
|
|
|
|
#if 0
|
|
// sets the current alpha on this context
|
|
virtual void SetAlpha( wxDouble alpha );
|
|
|
|
// returns the alpha on this context
|
|
virtual wxDouble GetAlpha() const;
|
|
#endif
|
|
|
|
// all rendering is done into a fully transparent temporary context
|
|
virtual void BeginLayer(wxDouble opacity) = 0;
|
|
|
|
// composites back the drawings into the context with the opacity given at
|
|
// the BeginLayer call
|
|
virtual void EndLayer() = 0;
|
|
|
|
//
|
|
// transformation : changes the current transformation matrix CTM of the context
|
|
//
|
|
|
|
// translate
|
|
virtual void Translate( wxDouble dx , wxDouble dy ) = 0;
|
|
|
|
// scale
|
|
virtual void Scale( wxDouble xScale , wxDouble yScale ) = 0;
|
|
|
|
// rotate (radians)
|
|
virtual void Rotate( wxDouble angle ) = 0;
|
|
|
|
// concatenates this transform with the current transform of this context
|
|
virtual void ConcatTransform( const wxGraphicsMatrix& matrix ) = 0;
|
|
|
|
// sets the transform of this context
|
|
virtual void SetTransform( const wxGraphicsMatrix& matrix ) = 0;
|
|
|
|
// gets the matrix of this context
|
|
virtual wxGraphicsMatrix GetTransform() const = 0;
|
|
//
|
|
// setting the paint
|
|
//
|
|
|
|
// sets the pen
|
|
virtual void SetPen( const wxGraphicsPen& pen );
|
|
|
|
void SetPen( const wxPen& pen );
|
|
|
|
// sets the brush for filling
|
|
virtual void SetBrush( const wxGraphicsBrush& brush );
|
|
|
|
void SetBrush( const wxBrush& brush );
|
|
|
|
// sets the font
|
|
virtual void SetFont( const wxGraphicsFont& font );
|
|
|
|
void SetFont( const wxFont& font, const wxColour& colour );
|
|
|
|
|
|
// strokes along a path with the current pen
|
|
virtual void StrokePath( const wxGraphicsPath& path ) = 0;
|
|
|
|
// fills a path with the current brush
|
|
virtual void FillPath( const wxGraphicsPath& path, wxPolygonFillMode fillStyle = wxODDEVEN_RULE ) = 0;
|
|
|
|
// draws a path by first filling and then stroking
|
|
virtual void DrawPath( const wxGraphicsPath& path, wxPolygonFillMode fillStyle = wxODDEVEN_RULE );
|
|
|
|
//
|
|
// text
|
|
//
|
|
|
|
void DrawText( const wxString &str, wxDouble x, wxDouble y )
|
|
{ DoDrawText(str, x, y); }
|
|
|
|
void DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle )
|
|
{ DoDrawRotatedText(str, x, y, angle); }
|
|
|
|
void DrawText( const wxString &str, wxDouble x, wxDouble y,
|
|
const wxGraphicsBrush& backgroundBrush )
|
|
{ DoDrawFilledText(str, x, y, backgroundBrush); }
|
|
|
|
void DrawText( const wxString &str, wxDouble x, wxDouble y,
|
|
wxDouble angle, const wxGraphicsBrush& backgroundBrush )
|
|
{ DoDrawRotatedFilledText(str, x, y, angle, backgroundBrush); }
|
|
|
|
|
|
virtual void GetTextExtent( const wxString &text, wxDouble *width, wxDouble *height,
|
|
wxDouble *descent = NULL, wxDouble *externalLeading = NULL ) const = 0;
|
|
|
|
virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const = 0;
|
|
|
|
//
|
|
// image support
|
|
//
|
|
|
|
virtual void DrawBitmap( const wxGraphicsBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
|
|
|
|
virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
|
|
|
|
virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
|
|
|
|
//
|
|
// convenience methods
|
|
//
|
|
|
|
// strokes a single line
|
|
virtual void StrokeLine( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2);
|
|
|
|
// stroke lines connecting each of the points
|
|
virtual void StrokeLines( size_t n, const wxPoint2DDouble *points);
|
|
|
|
// stroke disconnected lines from begin to end points
|
|
virtual void StrokeLines( size_t n, const wxPoint2DDouble *beginPoints, const wxPoint2DDouble *endPoints);
|
|
|
|
// draws a polygon
|
|
virtual void DrawLines( size_t n, const wxPoint2DDouble *points, wxPolygonFillMode fillStyle = wxODDEVEN_RULE );
|
|
|
|
// draws a rectangle
|
|
virtual void DrawRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
|
|
|
|
// draws an ellipse
|
|
virtual void DrawEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
|
|
|
|
// draws a rounded rectangle
|
|
virtual void DrawRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);
|
|
|
|
// wrappers using wxPoint2DDouble TODO
|
|
|
|
// helper to determine if a 0.5 offset should be applied for the drawing operation
|
|
virtual bool ShouldOffset() const { return false; }
|
|
|
|
// indicates whether the context should try to offset for pixel boundaries, this only makes sense on
|
|
// bitmap devices like screen, by default this is turned off
|
|
virtual void EnableOffset(bool enable = true);
|
|
|
|
void DisableOffset() { EnableOffset(false); }
|
|
bool OffsetEnabled() { return m_enableOffset; }
|
|
|
|
protected:
|
|
// These fields must be initialized in the derived class ctors.
|
|
wxDouble m_width,
|
|
m_height;
|
|
|
|
wxGraphicsPen m_pen;
|
|
wxGraphicsBrush m_brush;
|
|
wxGraphicsFont m_font;
|
|
wxAntialiasMode m_antialias;
|
|
wxCompositionMode m_composition;
|
|
wxInterpolationQuality m_interpolation;
|
|
bool m_enableOffset;
|
|
|
|
protected:
|
|
// implementations of overloaded public functions: we use different names
|
|
// for them to avoid the virtual function hiding problems in the derived
|
|
// classes
|
|
virtual void DoDrawText(const wxString& str, wxDouble x, wxDouble y) = 0;
|
|
virtual void DoDrawRotatedText(const wxString& str, wxDouble x, wxDouble y,
|
|
wxDouble angle);
|
|
virtual void DoDrawFilledText(const wxString& str, wxDouble x, wxDouble y,
|
|
const wxGraphicsBrush& backgroundBrush);
|
|
virtual void DoDrawRotatedFilledText(const wxString& str,
|
|
wxDouble x, wxDouble y,
|
|
wxDouble angle,
|
|
const wxGraphicsBrush& backgroundBrush);
|
|
|
|
wxDECLARE_NO_COPY_CLASS(wxGraphicsContext);
|
|
DECLARE_ABSTRACT_CLASS(wxGraphicsContext)
|
|
};
|
|
|
|
#if 0
|
|
|
|
//
|
|
// A graphics figure allows to cache path, pen etc creations, also will be a basis for layering/grouping elements
|
|
//
|
|
|
|
class WXDLLIMPEXP_CORE wxGraphicsFigure : public wxGraphicsObject
|
|
{
|
|
public:
|
|
wxGraphicsFigure(wxGraphicsRenderer* renderer);
|
|
|
|
virtual ~wxGraphicsFigure();
|
|
|
|
void SetPath( wxGraphicsMatrix* matrix );
|
|
|
|
void SetMatrix( wxGraphicsPath* path);
|
|
|
|
// draws this object on the context
|
|
virtual void Draw( wxGraphicsContext* cg );
|
|
|
|
// returns the path of this object
|
|
wxGraphicsPath* GetPath() { return m_path; }
|
|
|
|
// returns the transformation matrix of this object, may be null if there is no transformation necessary
|
|
wxGraphicsMatrix* GetMatrix() { return m_matrix; }
|
|
|
|
private:
|
|
wxGraphicsMatrix* m_matrix;
|
|
wxGraphicsPath* m_path;
|
|
|
|
DECLARE_DYNAMIC_CLASS(wxGraphicsFigure)
|
|
};
|
|
|
|
#endif
|
|
|
|
//
|
|
// The graphics renderer is the instance corresponding to the rendering engine used, eg there is ONE core graphics renderer
|
|
// instance on OSX. This instance is pointed back to by all objects created by it. Therefore you can create eg additional
|
|
// paths at any point from a given matrix etc.
|
|
//
|
|
|
|
class WXDLLIMPEXP_CORE wxGraphicsRenderer : public wxObject
|
|
{
|
|
public:
|
|
wxGraphicsRenderer() {}
|
|
|
|
virtual ~wxGraphicsRenderer() {}
|
|
|
|
static wxGraphicsRenderer* GetDefaultRenderer();
|
|
|
|
static wxGraphicsRenderer* GetCairoRenderer();
|
|
// Context
|
|
|
|
virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc) = 0;
|
|
virtual wxGraphicsContext * CreateContext( const wxMemoryDC& dc) = 0;
|
|
#if wxUSE_PRINTING_ARCHITECTURE
|
|
virtual wxGraphicsContext * CreateContext( const wxPrinterDC& dc) = 0;
|
|
#endif
|
|
#ifdef __WXMSW__
|
|
#if wxUSE_ENH_METAFILE
|
|
virtual wxGraphicsContext * CreateContext( const wxEnhMetaFileDC& dc) = 0;
|
|
#endif
|
|
#endif
|
|
|
|
virtual wxGraphicsContext * CreateContextFromNativeContext( void * context ) = 0;
|
|
|
|
virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window ) = 0;
|
|
|
|
virtual wxGraphicsContext * CreateContext( wxWindow* window ) = 0;
|
|
|
|
#if wxUSE_IMAGE
|
|
virtual wxGraphicsContext * CreateContextFromImage(wxImage& image) = 0;
|
|
#endif // wxUSE_IMAGE
|
|
|
|
// create a context that can be used for measuring texts only, no drawing allowed
|
|
virtual wxGraphicsContext * CreateMeasuringContext() = 0;
|
|
|
|
// Path
|
|
|
|
virtual wxGraphicsPath CreatePath() = 0;
|
|
|
|
// 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) = 0;
|
|
|
|
// Paints
|
|
|
|
virtual wxGraphicsPen CreatePen(const wxPen& pen) = 0;
|
|
|
|
virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) = 0;
|
|
|
|
// Gradient brush creation functions may not honour all the stops specified
|
|
// stops and use just its boundary colours (this is currently the case
|
|
// under OS X)
|
|
virtual wxGraphicsBrush
|
|
CreateLinearGradientBrush(wxDouble x1, wxDouble y1,
|
|
wxDouble x2, wxDouble y2,
|
|
const wxGraphicsGradientStops& stops) = 0;
|
|
|
|
virtual wxGraphicsBrush
|
|
CreateRadialGradientBrush(wxDouble xo, wxDouble yo,
|
|
wxDouble xc, wxDouble yc,
|
|
wxDouble radius,
|
|
const wxGraphicsGradientStops& stops) = 0;
|
|
|
|
// sets the font
|
|
virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) = 0;
|
|
virtual wxGraphicsFont CreateFont(double sizeInPixels,
|
|
const wxString& facename,
|
|
int flags = wxFONTFLAG_DEFAULT,
|
|
const wxColour& col = *wxBLACK) = 0;
|
|
|
|
// create a native bitmap representation
|
|
virtual wxGraphicsBitmap CreateBitmap( const wxBitmap &bitmap ) = 0;
|
|
#if wxUSE_IMAGE
|
|
virtual wxGraphicsBitmap CreateBitmapFromImage(const wxImage& image) = 0;
|
|
virtual wxImage CreateImageFromBitmap(const wxGraphicsBitmap& bmp) = 0;
|
|
#endif // wxUSE_IMAGE
|
|
|
|
// create a graphics bitmap from a native bitmap
|
|
virtual wxGraphicsBitmap CreateBitmapFromNativeBitmap( void* bitmap ) = 0;
|
|
|
|
// create a subimage from a native image representation
|
|
virtual wxGraphicsBitmap CreateSubBitmap( const wxGraphicsBitmap &bitmap, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
|
|
|
|
private:
|
|
wxDECLARE_NO_COPY_CLASS(wxGraphicsRenderer);
|
|
DECLARE_ABSTRACT_CLASS(wxGraphicsRenderer)
|
|
};
|
|
|
|
|
|
#if wxUSE_IMAGE
|
|
inline
|
|
wxImage wxGraphicsBitmap::ConvertToImage() const
|
|
{
|
|
wxGraphicsRenderer* renderer = GetRenderer();
|
|
return renderer ? renderer->CreateImageFromBitmap(*this) : wxNullImage;
|
|
}
|
|
#endif // wxUSE_IMAGE
|
|
|
|
#endif // wxUSE_GRAPHICS_CONTEXT
|
|
|
|
#endif // _WX_GRAPHICS_H_
|