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TTF.h
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1 // @(#)root/graf:$Id$
2 // Author: Olivier Couet 01/10/02
3 // Author: Fons Rademakers 21/11/98
4 
5 /*************************************************************************
6  * Copyright (C) 1995-2000, Rene Brun and Fons Rademakers. *
7  * All rights reserved. *
8  * *
9  * For the licensing terms see $ROOTSYS/LICENSE. *
10  * For the list of contributors see $ROOTSYS/README/CREDITS. *
11  *************************************************************************/
12 
13 #ifndef ROOT_TTF
14 #define ROOT_TTF
15 
16 
17 #include "Rtypes.h"
18 
19 /// @cond DOXYGEN_IGNORE
20 // Forward declare for the headers:
21 // # include <ft2build.h>
22 // # include FT_FREETYPE_H
23 // # include FT_GLYPH_H
24 extern "C" {
25  struct FT_LibraryRec_;
26  struct FT_FaceRec_;
27  struct FT_CharMapRec_;
28  struct FT_GlyphRec_;
29  struct FT_Matrix_;
30  struct FT_Bitmap_;
31  typedef struct FT_LibraryRec_* FT_Library;
32  typedef struct FT_FaceRec_* FT_Face;
33  typedef struct FT_CharMapRec_* FT_CharMap;
34  typedef struct FT_GlyphRec_* FT_Glyph;
35  typedef struct FT_Matrix_ FT_Matrix;
36  typedef struct FT_Bitmap_ FT_Bitmap; // Forward declared for TGX11TTF.h's benefit
37  typedef signed long FT_Pos;
38  #ifndef FT_FREETYPE_H
39  struct FT_Vector_ { FT_Pos x, y; };
40  struct FT_BBox_ { FT_Pos xMin, yMin, xMax, yMax; };
41  #endif
42  typedef struct FT_Vector_ FT_Vector;
43  typedef struct FT_BBox_ FT_BBox;
44 }
45 /// @endcond
46 
47 
48 class TGX11TTF;
49 class TGWin32;
50 class TMathTextRenderer;
51 
52 
53 class TTF {
54 
55 friend class TGX11TTF;
56 friend class TGWin32;
57 friend class TMathTextRenderer;
58 
59 public:
60 
61 /** \class TTGlyph
62 TTF helper class containing glyphs description.
63 */
64 
65  class TTGlyph {
66  public:
67  UInt_t fIndex; ///< glyph index in face
68  FT_Vector fPos; ///< position of glyph origin
69  FT_Glyph fImage; ///< glyph image
70  };
71 
72 protected:
73  enum { kTTMaxFonts = 32, kMaxGlyphs = 1024 };
74 
75  static Int_t fgAscent; ///< string ascent, used to compute Y alignment
76  static FT_BBox fgCBox; ///< string control box
77  static FT_CharMap fgCharMap[kTTMaxFonts]; ///< font character map
78  static Int_t fgCurFontIdx; ///< current font index
79  static Int_t fgSymbItaFontIdx; ///< Symbol italic font index
80  static Int_t fgFontCount; ///< number of fonts loaded
81  static char *fgFontName[kTTMaxFonts]; ///< font name
82  static FT_Face fgFace[kTTMaxFonts]; ///< font face
83  static TTF::TTGlyph fgGlyphs[kMaxGlyphs]; ///< glyphs
84  static Bool_t fgHinting; ///< use hinting (true by default)
85  static Bool_t fgInit; ///< true if the Init has been called
86  static Bool_t fgKerning; ///< use kerning (true by default)
87  static FT_Library fgLibrary; ///< FreeType font library
88  static Int_t fgNumGlyphs; ///< number of glyphs in the string
89  static FT_Matrix *fgRotMatrix; ///< rotation matrix
90  static Bool_t fgSmoothing; ///< use anti-aliasing (true when >8 planes, false otherwise)
91  static Int_t fgTBlankW; ///< trailing blanks width
92  static Int_t fgWidth; ///< string width, used to compute X alignment
93 
94 public:
95  static Short_t CharToUnicode(UInt_t code);
96  static void LayoutGlyphs();
97  static void PrepareString(const char *string);
98  static void PrepareString(const wchar_t *string);
99  static void SetRotationMatrix(Float_t angle);
100 
101 public:
102  TTF() { }
103  virtual ~TTF();
104 
105  static void Init();
106  static void Cleanup();
107  static Int_t GetAscent();
108  static const FT_BBox &GetBox();
109  static TTGlyph *GetGlyphs();
110  static Bool_t GetHinting();
111  static Bool_t GetKerning();
112  static Int_t GetNumGlyphs();
113  static FT_Matrix *GetRotMatrix();
114  static Bool_t GetSmoothing();
115  static Int_t GetWidth();
116  static void SetHinting(Bool_t state);
117  static void SetKerning(Bool_t state);
118  static void SetSmoothing(Bool_t state);
119  static void GetTextExtent(UInt_t &w, UInt_t &h, char *text);
120  static void GetTextExtent(UInt_t &w, UInt_t &h, wchar_t *text);
121  static void GetTextAdvance(UInt_t &a, char *text);
122  static void SetTextFont(Font_t fontnumber);
123  static Int_t SetTextFont(const char *fontname, Int_t italic=0);
124  static void SetTextSize(Float_t textsize);
125  static Bool_t IsInitialized();
126  static void Version(Int_t &major, Int_t &minor, Int_t &patch);
127 
128  ClassDef(TTF,0) //Interface to TTF font handling
129 };
130 
131 #endif