ReactOS 0.4.15-dev-8135-g1bc6c90
psblues.h
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1/***************************************************************************/
2/* */
3/* psblues.h */
4/* */
5/* Adobe's code for handling Blue Zones (specification). */
6/* */
7/* Copyright 2009-2013 Adobe Systems Incorporated. */
8/* */
9/* This software, and all works of authorship, whether in source or */
10/* object code form as indicated by the copyright notice(s) included */
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35/* */
36/***************************************************************************/
37
38
39 /*
40 * A `CF2_Blues' object stores the blue zones (horizontal alignment
41 * zones) of a font. These are specified in the CFF private dictionary
42 * by `BlueValues', `OtherBlues', `FamilyBlues', and `FamilyOtherBlues'.
43 * Each zone is defined by a top and bottom edge in character space.
44 * Further, each zone is either a top zone or a bottom zone, as recorded
45 * by `bottomZone'.
46 *
47 * The maximum number of `BlueValues' and `FamilyBlues' is 7 each.
48 * However, these are combined to produce a total of 7 zones.
49 * Similarly, the maximum number of `OtherBlues' and `FamilyOtherBlues'
50 * is 5 and these are combined to produce an additional 5 zones.
51 *
52 * Blue zones are used to `capture' hints and force them to a common
53 * alignment point. This alignment is recorded in device space in
54 * `dsFlatEdge'. Except for this value, a `CF2_Blues' object could be
55 * constructed independently of scaling. Construction may occur once
56 * the matrix is known. Other features implemented in the Capture
57 * method are overshoot suppression, overshoot enforcement, and Blue
58 * Boost.
59 *
60 * Capture is determined by `BlueValues' and `OtherBlues', but the
61 * alignment point may be adjusted to the scaled flat edge of
62 * `FamilyBlues' or `FamilyOtherBlues'. No alignment is done to the
63 * curved edge of a zone.
64 *
65 */
66
67
68#ifndef PSBLUES_H_
69#define PSBLUES_H_
70
71
72#include "psglue.h"
73
74
76
77
78 /*
79 * `CF2_Hint' is shared by `cf2hints.h' and
80 * `cf2blues.h', but `cf2blues.h' depends on
81 * `cf2hints.h', so define it here. Note: The typedef is in
82 * `cf2glue.h'.
83 *
84 */
85 enum
86 {
87 CF2_GhostBottom = 0x1, /* a single bottom edge */
88 CF2_GhostTop = 0x2, /* a single top edge */
89 CF2_PairBottom = 0x4, /* the bottom edge of a stem hint */
90 CF2_PairTop = 0x8, /* the top edge of a stem hint */
91 CF2_Locked = 0x10, /* this edge has been aligned */
92 /* by a blue zone */
93 CF2_Synthetic = 0x20 /* this edge was synthesized */
94 };
95
96
97 /*
98 * Default value for OS/2 typoAscender/Descender when their difference
99 * is not equal to `unitsPerEm'. The default is based on -250 and 1100
100 * in `CF2_Blues', assuming 1000 units per em here.
101 *
102 */
103 enum
104 {
107 };
108
109
110 /*
111 * Constant used for hint adjustment and for synthetic em box hint
112 * placement.
113 */
114#define CF2_MIN_COUNTER cf2_doubleToFixed( 0.5 )
115
116
117 /* shared typedef is in cf2glue.h */
119 {
120 CF2_UInt flags; /* attributes of the edge */
121 size_t index; /* index in original stem hint array */
122 /* (if not synthetic) */
126 };
127
128
129 typedef struct CF2_BlueRec_
130 {
133 CF2_Fixed csFlatEdge; /* may be from either local or Family zones */
134 CF2_Fixed dsFlatEdge; /* top edge of bottom zone or bottom edge */
135 /* of top zone (rounded) */
137
139
140
141 /* max total blue zones is 12 */
142 enum
143 {
146 };
147
148
149 typedef struct CF2_BluesRec_
150 {
155
159
161
164
166
168
169
170 FT_LOCAL( void )
172 CF2_Font font );
174 cf2_blues_capture( const CF2_Blues blues,
175 CF2_Hint bottomHintEdge,
176 CF2_Hint topHintEdge );
177
178
180
181
182#endif /* PSBLUES_H_ */
183
184
185/* END */
#define FT_LOCAL(x)
Definition: ftconfig.h:387
#define FT_END_HEADER
Definition: ftheader.h:54
#define FT_BEGIN_HEADER
Definition: ftheader.h:36
FT_BEGIN_HEADER typedef unsigned char FT_Bool
Definition: fttypes.h:108
#define CF2_UInt
Definition: pstypes.h:64
Definition: mk_font.cpp:20
cf2_blues_capture(const CF2_Blues blues, CF2_Hint bottomHintEdge, CF2_Hint topHintEdge)
Definition: psblues.c:465
@ CF2_Synthetic
Definition: psblues.h:93
@ CF2_PairTop
Definition: psblues.h:90
@ CF2_PairBottom
Definition: psblues.h:89
@ CF2_GhostTop
Definition: psblues.h:88
@ CF2_GhostBottom
Definition: psblues.h:87
@ CF2_Locked
Definition: psblues.h:91
struct CF2_BluesRec_ * CF2_Blues
struct CF2_BluesRec_ CF2_BluesRec
@ CF2_ICF_Bottom
Definition: psblues.h:106
@ CF2_ICF_Top
Definition: psblues.h:105
struct CF2_BlueRec_ CF2_BlueRec
@ CF2_MAX_BLUES
Definition: psblues.h:144
@ CF2_MAX_OTHERBLUES
Definition: psblues.h:145
cf2_blues_init(CF2_Blues blues, CF2_Font font)
Definition: psblues.c:66
#define cf2_intToFixed(i)
Definition: psfixed.h:60
#define CF2_Fixed
Definition: psfixed.h:48
CF2_Fixed dsFlatEdge
Definition: psblues.h:134
CF2_Fixed csBottomEdge
Definition: psblues.h:131
FT_Bool bottomZone
Definition: psblues.h:136
CF2_Fixed csFlatEdge
Definition: psblues.h:133
CF2_Fixed csTopEdge
Definition: psblues.h:132
CF2_Fixed blueFuzz
Definition: psblues.h:158
CF2_Fixed blueShift
Definition: psblues.h:157
FT_Bool suppressOvershoot
Definition: psblues.h:153
CF2_Fixed blueScale
Definition: psblues.h:156
CF2_BlueRec zone[CF2_MAX_BLUES+CF2_MAX_OTHERBLUES]
Definition: psblues.h:165
CF2_Fixed boost
Definition: psblues.h:160
CF2_UInt count
Definition: psblues.h:152
FT_Bool doEmBoxHints
Definition: psblues.h:154
CF2_HintRec emBoxTopEdge
Definition: psblues.h:162
CF2_HintRec emBoxBottomEdge
Definition: psblues.h:163
CF2_Fixed scale
Definition: psblues.h:151
CF2_Fixed scale
Definition: psblues.h:125
size_t index
Definition: psblues.h:121
CF2_Fixed csCoord
Definition: psblues.h:123
CF2_UInt flags
Definition: psblues.h:120
CF2_Fixed dsCoord
Definition: psblues.h:124