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wxWidgets/include/wx/fontutil.h
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wxWidgets/include/wx/fontutil.h
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/////////////////////////////////////////////////////////////////////////////
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// Name: wx/fontutil.h
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// Purpose: font-related helper functions
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 05.11.99
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// RCS-ID: $Id: fontutil.h 49563 2007-10-31 20:46:21Z VZ $
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// Copyright: (c) wxWidgets team
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// General note: this header is private to wxWidgets and is not supposed to be
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// included by user code. The functions declared here are implemented in
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// msw/fontutil.cpp for Windows, unix/fontutil.cpp for GTK/Motif &c.
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#ifndef _WX_FONTUTIL_H_
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#define _WX_FONTUTIL_H_
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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#include "wx/font.h" // for wxFont and wxFontEncoding
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#if defined(__WXMSW__)
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#include "wx/msw/wrapwin.h"
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#endif
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class WXDLLIMPEXP_FWD_BASE wxArrayString;
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struct WXDLLIMPEXP_FWD_CORE wxNativeEncodingInfo;
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#if defined(_WX_X_FONTLIKE)
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// the symbolic names for the XLFD fields (with examples for their value)
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//
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// NB: we suppose that the font always starts with the empty token (font name
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// registry field) as we never use nor generate it anyhow
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enum wxXLFDField
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{
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wxXLFD_FOUNDRY, // adobe
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wxXLFD_FAMILY, // courier, times, ...
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wxXLFD_WEIGHT, // black, bold, demibold, medium, regular, light
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wxXLFD_SLANT, // r/i/o (roman/italique/oblique)
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wxXLFD_SETWIDTH, // condensed, expanded, ...
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wxXLFD_ADDSTYLE, // whatever - usually nothing
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wxXLFD_PIXELSIZE, // size in pixels
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wxXLFD_POINTSIZE, // size in points
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wxXLFD_RESX, // 72, 75, 100, ...
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wxXLFD_RESY,
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wxXLFD_SPACING, // m/p/c (monospaced/proportional/character cell)
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wxXLFD_AVGWIDTH, // average width in 1/10 pixels
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wxXLFD_REGISTRY, // iso8859, rawin, koi8, ...
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wxXLFD_ENCODING, // 1, r, r, ...
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wxXLFD_MAX
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};
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#endif // _WX_X_FONTLIKE
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// ----------------------------------------------------------------------------
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// types
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// ----------------------------------------------------------------------------
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// wxNativeFontInfo is platform-specific font representation: this struct
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// should be considered as opaque font description only used by the native
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// functions, the user code can only get the objects of this type from
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// somewhere and pass it somewhere else (possibly save them somewhere using
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// ToString() and restore them using FromString())
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class WXDLLEXPORT wxNativeFontInfo
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{
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public:
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#if wxUSE_PANGO
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PangoFontDescription *description;
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#elif defined(_WX_X_FONTLIKE)
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// the members can't be accessed directly as we only parse the
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// xFontName on demand
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private:
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// the components of the XLFD
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wxString fontElements[wxXLFD_MAX];
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// the full XLFD
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wxString xFontName;
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// true until SetXFontName() is called
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bool m_isDefault;
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// return true if we have already initialized fontElements
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inline bool HasElements() const;
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public:
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// init the elements from an XLFD, return true if ok
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bool FromXFontName(const wxString& xFontName);
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// return false if we were never initialized with a valid XLFD
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bool IsDefault() const { return m_isDefault; }
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// return the XLFD (using the fontElements if necessary)
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wxString GetXFontName() const;
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// get the given XFLD component
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wxString GetXFontComponent(wxXLFDField field) const;
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// change the font component
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void SetXFontComponent(wxXLFDField field, const wxString& value);
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// set the XFLD
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void SetXFontName(const wxString& xFontName);
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#elif defined(__WXMSW__)
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LOGFONT lf;
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#elif defined(__WXPM__)
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// OS/2 native structures that define a font
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FATTRS fa;
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FONTMETRICS fm;
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FACENAMEDESC fn;
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#else // other platforms
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//
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// This is a generic implementation that should work on all ports
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// without specific support by the port.
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//
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#define wxNO_NATIVE_FONTINFO
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int pointSize;
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wxFontFamily family;
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wxFontStyle style;
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wxFontWeight weight;
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bool underlined;
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wxString faceName;
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wxFontEncoding encoding;
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#endif // platforms
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// default ctor (default copy ctor is ok)
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wxNativeFontInfo() { Init(); }
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#if wxUSE_PANGO
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private:
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void Init(const wxNativeFontInfo& info);
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void Free();
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public:
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wxNativeFontInfo(const wxNativeFontInfo& info) { Init(info); }
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~wxNativeFontInfo() { Free(); }
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wxNativeFontInfo& operator=(const wxNativeFontInfo& info)
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{
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Free();
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Init(info);
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return *this;
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}
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#endif // wxUSE_PANGO
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// reset to the default state
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void Init();
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// init with the parameters of the given font
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void InitFromFont(const wxFont& font)
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{
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// translate all font parameters
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SetStyle((wxFontStyle)font.GetStyle());
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SetWeight((wxFontWeight)font.GetWeight());
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SetUnderlined(font.GetUnderlined());
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#if defined(__WXMSW__)
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if ( font.IsUsingSizeInPixels() )
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SetPixelSize(font.GetPixelSize());
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else
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SetPointSize(font.GetPointSize());
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#else
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SetPointSize(font.GetPointSize());
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#endif
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// set the family/facename
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SetFamily((wxFontFamily)font.GetFamily());
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const wxString& facename = font.GetFaceName();
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if ( !facename.empty() )
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{
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SetFaceName(facename);
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}
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// deal with encoding now (it may override the font family and facename
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// so do it after setting them)
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SetEncoding(font.GetEncoding());
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}
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// accessors and modifiers for the font elements
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int GetPointSize() const;
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wxSize GetPixelSize() const;
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wxFontStyle GetStyle() const;
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wxFontWeight GetWeight() const;
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bool GetUnderlined() const;
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wxString GetFaceName() const;
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wxFontFamily GetFamily() const;
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wxFontEncoding GetEncoding() const;
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void SetPointSize(int pointsize);
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void SetPixelSize(const wxSize& pixelSize);
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void SetStyle(wxFontStyle style);
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void SetWeight(wxFontWeight weight);
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void SetUnderlined(bool underlined);
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bool SetFaceName(const wxString& facename);
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void SetFamily(wxFontFamily family);
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void SetEncoding(wxFontEncoding encoding);
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// sets the first facename in the given array which is found
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// to be valid. If no valid facename is given, sets the
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// first valid facename returned by wxFontEnumerator::GetFacenames().
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// Does not return a bool since it cannot fail.
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void SetFaceName(const wxArrayString &facenames);
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// it is important to be able to serialize wxNativeFontInfo objects to be
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// able to store them (in config file, for example)
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bool FromString(const wxString& s);
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wxString ToString() const;
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// we also want to present the native font descriptions to the user in some
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// human-readable form (it is not platform independent neither, but can
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// hopefully be understood by the user)
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bool FromUserString(const wxString& s);
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wxString ToUserString() const;
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};
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// ----------------------------------------------------------------------------
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// font-related functions (common)
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// ----------------------------------------------------------------------------
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// translate a wxFontEncoding into native encoding parameter (defined above),
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// returning true if an (exact) macth could be found, false otherwise (without
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// attempting any substitutions)
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extern bool wxGetNativeFontEncoding(wxFontEncoding encoding,
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wxNativeEncodingInfo *info);
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// test for the existence of the font described by this facename/encoding,
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// return true if such font(s) exist, false otherwise
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extern bool wxTestFontEncoding(const wxNativeEncodingInfo& info);
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// ----------------------------------------------------------------------------
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// font-related functions (X and GTK)
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// ----------------------------------------------------------------------------
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#ifdef _WX_X_FONTLIKE
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#include "wx/unix/fontutil.h"
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#endif // X || GDK
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#endif // _WX_FONTUTIL_H_
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