Visualization Library 2.0.0-b5

A lightweight C++ OpenGL middleware for 2D/3D graphics

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afindic.c
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1 /***************************************************************************/
2 /* */
3 /* afindic.c */
4 /* */
5 /* Auto-fitter hinting routines for Indic scripts (body). */
6 /* */
7 /* Copyright 2007, 2011-2013 by */
8 /* Rahul Bhalerao <rahul.bhalerao@redhat.com>, <b.rahul.pm@gmail.com>. */
9 /* */
10 /* This file is part of the FreeType project, and may only be used, */
11 /* modified, and distributed under the terms of the FreeType project */
12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
13 /* this file you indicate that you have read the license and */
14 /* understand and accept it fully. */
15 /* */
16 /***************************************************************************/
17 
18 
19 #include "aftypes.h"
20 #include "aflatin.h"
21 
22 
23 #ifdef AF_CONFIG_OPTION_INDIC
24 
25 #include "afindic.h"
26 #include "aferrors.h"
27 #include "afcjk.h"
28 
29 
30 #ifdef AF_CONFIG_OPTION_USE_WARPER
31 #include "afwarp.h"
32 #endif
33 
34 
35  static FT_Error
36  af_indic_metrics_init( AF_CJKMetrics metrics,
37  FT_Face face )
38  {
39  /* skip blue zone init in CJK routines */
40  FT_CharMap oldmap = face->charmap;
41 
42 
43  metrics->units_per_em = face->units_per_EM;
44 
45  if ( FT_Select_Charmap( face, FT_ENCODING_UNICODE ) )
46  face->charmap = NULL;
47  else
48  {
49  af_cjk_metrics_init_widths( metrics, face );
50 #if 0
51  /* either need indic specific blue_chars[] or just skip blue zones */
52  af_cjk_metrics_init_blues( metrics, face, af_cjk_blue_chars );
53 #endif
54  af_cjk_metrics_check_digits( metrics, face );
55  }
56 
57  FT_Set_Charmap( face, oldmap );
58 
59  return FT_Err_Ok;
60  }
61 
62 
63  static void
64  af_indic_metrics_scale( AF_CJKMetrics metrics,
65  AF_Scaler scaler )
66  {
67  /* use CJK routines */
68  af_cjk_metrics_scale( metrics, scaler );
69  }
70 
71 
72  static FT_Error
73  af_indic_hints_init( AF_GlyphHints hints,
74  AF_CJKMetrics metrics )
75  {
76  /* use CJK routines */
77  return af_cjk_hints_init( hints, metrics );
78  }
79 
80 
81  static FT_Error
82  af_indic_hints_apply( AF_GlyphHints hints,
83  FT_Outline* outline,
84  AF_CJKMetrics metrics )
85  {
86  /* use CJK routines */
87  return af_cjk_hints_apply( hints, outline, metrics );
88  }
89 
90 
91  /*************************************************************************/
92  /*************************************************************************/
93  /***** *****/
94  /***** I N D I C S C R I P T C L A S S *****/
95  /***** *****/
96  /*************************************************************************/
97  /*************************************************************************/
98 
99 
100  static const AF_Script_UniRangeRec af_indic_uniranges[] =
101  {
102 #if 0
103  AF_UNIRANGE_REC( 0x0100UL, 0xFFFFUL ), /* why this? */
104 #endif
105  AF_UNIRANGE_REC( 0x0900UL, 0x0DFFUL), /* Indic Range */
106  AF_UNIRANGE_REC( 0x0F00UL, 0x0FFFUL), /* Tibetan */
107  AF_UNIRANGE_REC( 0x1900UL, 0x194FUL), /* Limbu */
108  AF_UNIRANGE_REC( 0x1B80UL, 0x1BBFUL), /* Sundanese */
109  AF_UNIRANGE_REC( 0x1C80UL, 0x1CDFUL), /* Meetei Mayak */
110  AF_UNIRANGE_REC( 0xA800UL, 0xA82FUL), /* Syloti Nagri */
111  AF_UNIRANGE_REC( 0x11800UL, 0x118DFUL), /* Sharada */
112  AF_UNIRANGE_REC( 0UL, 0UL)
113  };
114 
115 
116  AF_DEFINE_SCRIPT_CLASS( af_indic_script_class,
118  af_indic_uniranges,
119  'o', /* XXX */
120 
121  sizeof ( AF_CJKMetricsRec ),
122 
123  (AF_Script_InitMetricsFunc) af_indic_metrics_init,
124  (AF_Script_ScaleMetricsFunc)af_indic_metrics_scale,
126 
127  (AF_Script_InitHintsFunc) af_indic_hints_init,
128  (AF_Script_ApplyHintsFunc) af_indic_hints_apply
129  )
130 
131 #else /* !AF_CONFIG_OPTION_INDIC */
132 
133  static const AF_Script_UniRangeRec af_indic_uniranges[] =
134  {
135  { 0, 0 }
136  };
137 
138 
139  AF_DEFINE_SCRIPT_CLASS( af_indic_script_class,
141  af_indic_uniranges,
142  0,
143 
144  sizeof ( AF_CJKMetricsRec ),
145 
149 
152  )
153 
154 #endif /* !AF_CONFIG_OPTION_INDIC */
155 
156 
157 /* END */
FT_UShort units_per_EM
Definition: freetype.h:945
int FT_Error
Definition: fttypes.h:296
FT_UInt units_per_em
Definition: afcjk.h:100
FT_CharMap charmap
Definition: freetype.h:958
#define NULL
Definition: ftobjs.h:61
void(* AF_Script_DoneMetricsFunc)(AF_ScriptMetrics metrics)
Definition: aftypes.h:274
#define AF_UNIRANGE_REC(a, b)
Definition: aftypes.h:294
return FT_Err_Ok
Definition: ftbbox.c:645
FT_Error(* AF_Script_InitHintsFunc)(AF_GlyphHints hints, AF_ScriptMetrics metrics)
Definition: aftypes.h:278
GLenum GLuint GLint GLenum face
#define AF_DEFINE_SCRIPT_CLASS(script_class, script_, ranges, def_char, m_size, m_init, m_scale, m_done, h_init, h_apply)
Definition: aftypes.h:323
FT_Select_Charmap(FT_Face face, FT_Encoding encoding)
Definition: ftobjs.c:3066
void(* AF_Script_ApplyHintsFunc)(AF_GlyphHints hints, FT_Outline *outline, AF_ScriptMetrics metrics)
Definition: aftypes.h:282
FT_Set_Charmap(FT_Face face, FT_CharMap charmap)
Definition: ftobjs.c:3117
FT_Error(* AF_Script_InitMetricsFunc)(AF_ScriptMetrics metrics, FT_Face face)
Definition: aftypes.h:266
GLsizei GLenum const GLvoid GLuint GLsizei GLfloat * metrics
void(* AF_Script_ScaleMetricsFunc)(AF_ScriptMetrics metrics, AF_Scaler scaler)
Definition: aftypes.h:270