zenilib: zenilib/jni/external/freetype2/src/gxvalid/gxvmort0.c Source File

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gxvmort0.c
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1 /***************************************************************************/
2 /* */
3 /* gxvmort0.c */
4 /* */
5 /* TrueTypeGX/AAT mort table validation */
6 /* body for type0 (Indic Script Rearrangement) subtable. */
7 /* */
8 /* Copyright 2005 by suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
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 /* */
21 /* gxvalid is derived from both gxlayout module and otvalid module. */
22 /* Development of gxlayout is supported by the Information-technology */
23 /* Promotion Agency(IPA), Japan. */
24 /* */
25 /***************************************************************************/
26
27
28 #include "gxvmort.h"
29
30
31 /*************************************************************************/
32 /* */
33 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
34 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
35 /* messages during execution. */
36 /* */
37 #undef FT_COMPONENT
38 #define FT_COMPONENT trace_gxvmort
39
40
41 static const char* GXV_Mort_IndicScript_Msg[] =
42 {
43 "no change",
44 "Ax => xA",
45 "xD => Dx",
46 "AxD => DxA",
47 "ABx => xAB",
48 "ABx => xBA",
49 "xCD => CDx",
50 "xCD => DCx",
51 "AxCD => CDxA",
52 "AxCD => DCxA",
53 "ABxD => DxAB",
54 "ABxD => DxBA",
55 "ABxCD => CDxAB",
56 "ABxCD => CDxBA",
57 "ABxCD => DCxAB",
58 "ABxCD => DCxBA",
59
60 };
61
62
63 static void
64 gxv_mort_subtable_type0_entry_validate(
65 FT_Byte state,
66 FT_UShort flags,
67 GXV_StateTable_GlyphOffsetCPtr glyphOffset_p,
68 FT_Bytes table,
69 FT_Bytes limit,
70 GXV_Validator valid )
71 {
72 FT_UShort markFirst;
73 FT_UShort dontAdvance;
74 FT_UShort markLast;
75 FT_UShort reserved;
76 FT_UShort verb = 0;
77
78 FT_UNUSED( state );
79 FT_UNUSED( table );
80 FT_UNUSED( limit );
81
82 FT_UNUSED( GXV_Mort_IndicScript_Msg[verb] ); /* for the non-debugging */
83 FT_UNUSED( glyphOffset_p ); /* case */
84
85
86 markFirst = (FT_UShort)( ( flags >> 15 ) & 1 );
87 dontAdvance = (FT_UShort)( ( flags >> 14 ) & 1 );
88 markLast = (FT_UShort)( ( flags >> 13 ) & 1 );
89
90 reserved = (FT_UShort)( flags & 0x1FF0 );
91 verb = (FT_UShort)( flags & 0x000F );
92
93 GXV_TRACE(( " IndicScript MorphRule for glyphOffset 0x%04x",
94 glyphOffset_p->u ));
95 GXV_TRACE(( " markFirst=%01d", markFirst ));
96 GXV_TRACE(( " dontAdvance=%01d", dontAdvance ));
97 GXV_TRACE(( " markLast=%01d", markLast ));
98 GXV_TRACE(( " %02d", verb ));
99 GXV_TRACE(( " %s\n", GXV_Mort_IndicScript_Msg[verb] ));
100
101 if ( markFirst > 0 && markLast > 0 )
102 {
103 GXV_TRACE(( " [odd] a glyph is marked as the first and last"
104 " in Indic rearrangement\n" ));
105 GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
106 }
107
108 if ( markFirst > 0 && dontAdvance > 0 )
109 {
110 GXV_TRACE(( " [odd] the first glyph is marked as dontAdvance"
111 " in Indic rearrangement\n" ));
112 GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
113 }
114
115 if ( 0 < reserved )
116 {
117 GXV_TRACE(( " non-zero bits found in reserved range\n" ));
118 GXV_SET_ERR_IF_PARANOID( FT_INVALID_DATA );
119 }
120 else
121 GXV_TRACE(( "\n" ));
122 }
123
124
125 FT_LOCAL_DEF( void )
126 gxv_mort_subtable_type0_validate( FT_Bytes table,
127 FT_Bytes limit,
128 GXV_Validator valid )
129 {
130 FT_Bytes p = table;
131
132
133 GXV_NAME_ENTER(
134 "mort chain subtable type0 (Indic-Script Rearrangement)" );
135
136 GXV_LIMIT_CHECK( GXV_STATETABLE_HEADER_SIZE );
137
138 valid->statetable.optdata = NULL;
139 valid->statetable.optdata_load_func = NULL;
140 valid->statetable.subtable_setup_func = NULL;
141 valid->statetable.entry_glyphoffset_fmt = GXV_GLYPHOFFSET_NONE;
142 valid->statetable.entry_validate_func =
143 gxv_mort_subtable_type0_entry_validate;
144
145 gxv_StateTable_validate( p, limit, valid );
146
147 GXV_EXIT;
148 }
149
150
151 /* END */
table
GLenum GLsizei GLenum GLenum const GLvoid * table
Definition: glew.h:4422
gxv_mort_subtable_type0_entry_validate
static void gxv_mort_subtable_type0_entry_validate(FT_Byte state, FT_UShort flags, GXV_StateTable_GlyphOffsetCPtr glyphOffset_p, FT_Bytes table, FT_Bytes limit, GXV_Validator valid)
Definition: gxvmort0.c:64
NULL
#define NULL
Definition: ftobjs.h:61
GXV_NAME_ENTER
#define GXV_NAME_ENTER(name)
Definition: gxvcommn.h:301
GXV_TRACE
#define GXV_TRACE(s)
Definition: gxvcommn.h:304
GXV_StateTable_GlyphOffsetDesc_::u
FT_UShort u
Definition: gxvcommn.h:145
GXV_StateTable_GlyphOffsetDesc_
Definition: gxvcommn.h:142
gxvmort.h
GXV_SET_ERR_IF_PARANOID
#define GXV_SET_ERR_IF_PARANOID(err)
Definition: gxvcommn.h:66
FT_Byte
unsigned char FT_Byte
Definition: fttypes.h:150
GXV_GLYPHOFFSET_NONE
Definition: gxvcommn.h:122
GXV_EXIT
#define GXV_EXIT
Definition: gxvcommn.h:302
FT_LOCAL_DEF
#define FT_LOCAL_DEF(x)
Definition: ftconfig.h:467
p
GLfloat GLfloat p
Definition: glew.h:14938
limit
GLint limit
Definition: glew.h:11829
gxv_mort_subtable_type0_validate
gxv_mort_subtable_type0_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator valid)
Definition: gxvmort0.c:126
FT_Bytes
const FT_Byte * FT_Bytes
Definition: fttypes.h:161
GXV_Mort_IndicScript_Msg
static const char * GXV_Mort_IndicScript_Msg[]
Definition: gxvmort0.c:41
GXV_STATETABLE_HEADER_SIZE
#define GXV_STATETABLE_HEADER_SIZE
Definition: gxvcommn.h:520
flags
GLenum GLsizei GLsizei GLsizei GLsizei GLbitfield flags
Definition: glew.h:2767
FT_INVALID_DATA
#define FT_INVALID_DATA
Definition: ftvalid.h:141
FT_UShort
unsigned short FT_UShort
Definition: fttypes.h:205
gxv_StateTable_validate
gxv_StateTable_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator valid)
Definition: gxvcommn.c:1214
FT_UNUSED
#define FT_UNUSED(arg)
Definition: ftconfig.h:101
GXV_ValidatorRec_
Definition: gxvcommn.h:237
GXV_LIMIT_CHECK
#define GXV_LIMIT_CHECK(_count)
Definition: gxvcommn.h:272