ReactOS 0.4.15-dev-5669-g09dde2c
afglobal.h
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1/***************************************************************************/
2/* */
3/* afglobal.h */
4/* */
5/* Auto-fitter routines to compute global hinting values */
6/* (specification). */
7/* */
8/* Copyright 2003-2018 by */
9/* David Turner, Robert Wilhelm, and Werner Lemberg. */
10/* */
11/* This file is part of the FreeType project, and may only be used, */
12/* modified, and distributed under the terms of the FreeType project */
13/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
14/* this file you indicate that you have read the license and */
15/* understand and accept it fully. */
16/* */
17/***************************************************************************/
18
19
20#ifndef AFGLOBAL_H_
21#define AFGLOBAL_H_
22
23
24#include "aftypes.h"
25#include "afmodule.h"
26#include "afshaper.h"
27
28
30
31
34
35
36#undef SCRIPT
37#define SCRIPT( s, S, d, h, H, ss ) \
38 AF_DECLARE_SCRIPT_CLASS( af_ ## s ## _script_class )
39
40#include "afscript.h"
41
44
45
46#undef STYLE
47#define STYLE( s, S, d, ws, sc, ss, c ) \
48 AF_DECLARE_STYLE_CLASS( af_ ## s ## _style_class )
49
50#include "afstyles.h"
51
54
55
56#ifdef FT_DEBUG_LEVEL_TRACE
57 FT_LOCAL_ARRAY( char* )
58 af_style_names[];
59#endif
60
61
62 /*
63 * Default values and flags for both autofitter globals (found in
64 * AF_ModuleRec) and face globals (in AF_FaceGlobalsRec).
65 */
66
67 /* index of fallback style in `af_style_classes' */
68#ifdef AF_CONFIG_OPTION_CJK
69#define AF_STYLE_FALLBACK AF_STYLE_HANI_DFLT
70#else
71#define AF_STYLE_FALLBACK AF_STYLE_NONE_DFLT
72#endif
73 /* default script for OpenType; ignored if HarfBuzz isn't used */
74#define AF_SCRIPT_DEFAULT AF_SCRIPT_LATN
75
76 /* a bit mask for AF_DIGIT and AF_NONBASE */
77#define AF_STYLE_MASK 0x3FFF
78 /* an uncovered glyph */
79#define AF_STYLE_UNASSIGNED AF_STYLE_MASK
80
81 /* if this flag is set, we have an ASCII digit */
82#define AF_DIGIT 0x8000U
83 /* if this flag is set, we have a non-base character */
84#define AF_NONBASE 0x4000U
85
86 /* `increase-x-height' property */
87#define AF_PROP_INCREASE_X_HEIGHT_MIN 6
88#define AF_PROP_INCREASE_X_HEIGHT_MAX 0
89
90
91 /************************************************************************/
92 /************************************************************************/
93 /***** *****/
94 /***** F A C E G L O B A L S *****/
95 /***** *****/
96 /************************************************************************/
97 /************************************************************************/
98
99
100 /*
101 * Note that glyph_styles[] maps each glyph to an index into the
102 * `af_style_classes' array.
103 *
104 */
105 typedef struct AF_FaceGlobalsRec_
106 {
108 FT_Long glyph_count; /* same as face->num_glyphs */
110
111#ifdef FT_CONFIG_OPTION_USE_HARFBUZZ
112 hb_font_t* hb_font;
113 hb_buffer_t* hb_buf; /* for feature comparison */
114#endif
115
116 /* per-face auto-hinter properties */
118
120
121 /* Compute darkening amount once per size. Use this to check whether */
122 /* darken_{x,y} needs to be recomputed. */
124 /* Copy from e.g. AF_LatinMetrics.axis[AF_DIMENSION_HORZ] */
125 /* to compute the darkening amount. */
127 /* Copy from e.g. AF_LatinMetrics.axis[AF_DIMENSION_VERT] */
128 /* to compute the darkening amount. */
130 /* The actual amount to darken a glyph along the X axis. */
132 /* The actual amount to darken a glyph along the Y axis. */
134 /* Amount to scale down by to keep emboldened points */
135 /* on the Y-axis in pre-computed blue zones. */
137 AF_Module module; /* to access global properties */
138
140
141
142 /*
143 * model the global hints data for a given face, decomposed into
144 * style-specific items
145 */
146
149 AF_FaceGlobals *aglobals,
151
154 FT_UInt gindex,
156 AF_StyleMetrics *ametrics );
157
158 FT_LOCAL( void )
160
163 FT_UInt gindex );
164
165 /* */
166
167
169
170#endif /* AFGLOBAL_H_ */
171
172
173/* END */
af_face_globals_is_digit(AF_FaceGlobals globals, FT_UInt gindex)
Definition: afglobal.c:493
af_face_globals_new(FT_Face face, AF_FaceGlobals *aglobals, AF_Module module)
Definition: afglobal.c:336
af_script_classes[]
Definition: afglobal.h:43
af_face_globals_free(AF_FaceGlobals globals)
Definition: afglobal.c:387
af_style_classes[]
Definition: afglobal.h:53
af_face_globals_get_metrics(AF_FaceGlobals globals, FT_UInt gindex, FT_UInt options, AF_StyleMetrics *ametrics)
Definition: afglobal.c:425
FT_BEGIN_HEADER af_writing_system_classes[]
Definition: afglobal.h:33
struct AF_FaceGlobalsRec_ AF_FaceGlobalsRec
FT_BEGIN_HEADER struct AF_ModuleRec_ * AF_Module
@ AF_STYLE_MAX
Definition: aftypes.h:440
#define FT_LOCAL_DEF(x)
Definition: ftconfig.h:388
#define FT_LOCAL(x)
Definition: ftconfig.h:387
#define FT_LOCAL_ARRAY(x)
Definition: ftconfig.h:393
#define FT_END_HEADER
Definition: ftheader.h:54
#define FT_BEGIN_HEADER
Definition: ftheader.h:36
FT_BEGIN_HEADER typedef signed long FT_Pos
Definition: ftimage.h:58
FT_BEGIN_HEADER typedef unsigned char FT_Bool
Definition: fttypes.h:108
signed long FT_Fixed
Definition: fttypes.h:288
int FT_Error
Definition: fttypes.h:300
signed long FT_Long
Definition: fttypes.h:242
unsigned short FT_UShort
Definition: fttypes.h:209
unsigned int FT_UInt
Definition: fttypes.h:231
GLenum GLuint GLint GLenum face
Definition: glext.h:7025
GLsizei GLenum const GLvoid GLuint GLsizei GLfloat * metrics
Definition: glext.h:11745
FT_UShort * glyph_styles
Definition: afglobal.h:109
AF_Module module
Definition: afglobal.h:137
FT_Long glyph_count
Definition: afglobal.h:108
FT_UShort stem_darkening_for_ppem
Definition: afglobal.h:123
FT_Pos standard_horizontal_width
Definition: afglobal.h:129
FT_Pos standard_vertical_width
Definition: afglobal.h:126
FT_UInt increase_x_height
Definition: afglobal.h:117
FT_Fixed scale_down_factor
Definition: afglobal.h:136