ReactOS 0.4.15-dev-7659-ga55345b
gxvmorx5.c
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1/***************************************************************************/
2/* */
3/* gxvmorx5.c */
4/* */
5/* TrueTypeGX/AAT morx table validation */
6/* body for type5 (Contextual Glyph Insertion) subtable. */
7/* */
8/* Copyright 2005-2018 by */
9/* suzuki toshiya, Masatake YAMATO, Red Hat K.K., */
10/* David Turner, Robert Wilhelm, and Werner Lemberg. */
11/* */
12/* This file is part of the FreeType project, and may only be used, */
13/* modified, and distributed under the terms of the FreeType project */
14/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
15/* this file you indicate that you have read the license and */
16/* understand and accept it fully. */
17/* */
18/***************************************************************************/
19
20/***************************************************************************/
21/* */
22/* gxvalid is derived from both gxlayout module and otvalid module. */
23/* Development of gxlayout is supported by the Information-technology */
24/* Promotion Agency(IPA), Japan. */
25/* */
26/***************************************************************************/
27
28
29#include "gxvmorx.h"
30
31
32 /*************************************************************************/
33 /* */
34 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
35 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
36 /* messages during execution. */
37 /* */
38#undef FT_COMPONENT
39#define FT_COMPONENT trace_gxvmorx
40
41
42 /*
43 * `morx' subtable type5 (Contextual Glyph Insertion)
44 * has format of a StateTable with insertion-glyph-list
45 * without name. However, the 32bit offset from the head
46 * of subtable to the i-g-l is given after `entryTable',
47 * without variable name specification (the existence of
48 * this offset to the table is different from mort type5).
49 */
50
51
53 {
56
59
60
61#define GXV_MORX_SUBTABLE_TYPE5_HEADER_SIZE \
62 ( GXV_STATETABLE_HEADER_SIZE + 4 )
63
64
65 static void
68 GXV_Validator gxvalid )
69 {
71
74
75
76 GXV_LIMIT_CHECK( 4 );
78 }
79
80
81 static void
83 FT_ULong classTable,
84 FT_ULong stateArray,
85 FT_ULong entryTable,
86 FT_ULong* classTable_length_p,
87 FT_ULong* stateArray_length_p,
88 FT_ULong* entryTable_length_p,
89 GXV_Validator gxvalid )
90 {
91 FT_ULong o[4];
92 FT_ULong* l[4];
93 FT_ULong buff[5];
94
97
98
99 o[0] = classTable;
100 o[1] = stateArray;
101 o[2] = entryTable;
102 o[3] = optdata->insertionGlyphList;
103 l[0] = classTable_length_p;
104 l[1] = stateArray_length_p;
105 l[2] = entryTable_length_p;
106 l[3] = &(optdata->insertionGlyphList_length);
107
109 }
110
111
112 static void
117 GXV_Validator gxvalid )
118 {
119 FT_Bytes p = table + table_index * 2;
120
121
122#ifndef GXV_LOAD_TRACE_VARS
123 GXV_LIMIT_CHECK( count * 2 );
124#else
125 while ( p < table + count * 2 + table_index * 2 )
126 {
127 FT_UShort insert_glyphID;
128
129
130 GXV_LIMIT_CHECK( 2 );
131 insert_glyphID = FT_NEXT_USHORT( p );
132 GXV_TRACE(( " 0x%04x", insert_glyphID ));
133 }
134
135 GXV_TRACE(( "\n" ));
136#endif
137 }
138
139
140 static void
144 GXV_StateTable_GlyphOffsetCPtr glyphOffset_p,
147 GXV_Validator gxvalid )
148 {
149#ifdef GXV_LOAD_UNUSED_VARS
150 FT_Bool setMark;
151 FT_Bool dontAdvance;
152 FT_Bool currentIsKashidaLike;
153 FT_Bool markedIsKashidaLike;
154 FT_Bool currentInsertBefore;
155 FT_Bool markedInsertBefore;
156#endif
157 FT_Byte currentInsertCount;
158 FT_Byte markedInsertCount;
159 FT_Byte currentInsertList;
160 FT_UShort markedInsertList;
161
162 FT_UNUSED( state );
163
164
165#ifdef GXV_LOAD_UNUSED_VARS
166 setMark = FT_BOOL( ( flags >> 15 ) & 1 );
167 dontAdvance = FT_BOOL( ( flags >> 14 ) & 1 );
168 currentIsKashidaLike = FT_BOOL( ( flags >> 13 ) & 1 );
169 markedIsKashidaLike = FT_BOOL( ( flags >> 12 ) & 1 );
170 currentInsertBefore = FT_BOOL( ( flags >> 11 ) & 1 );
171 markedInsertBefore = FT_BOOL( ( flags >> 10 ) & 1 );
172#endif
173
174 currentInsertCount = (FT_Byte)( ( flags >> 5 ) & 0x1F );
175 markedInsertCount = (FT_Byte)( flags & 0x001F );
176
177 currentInsertList = (FT_Byte) ( glyphOffset_p->ul >> 16 );
178 markedInsertList = (FT_UShort)( glyphOffset_p->ul );
179
180 if ( currentInsertList && 0 != currentInsertCount )
182 currentInsertCount,
183 table, limit,
184 gxvalid );
185
186 if ( markedInsertList && 0 != markedInsertCount )
188 markedInsertCount,
189 table, limit,
190 gxvalid );
191 }
192
193
194 FT_LOCAL_DEF( void )
197 GXV_Validator gxvalid )
198 {
199 FT_Bytes p = table;
200
203
204
205 GXV_NAME_ENTER( "morx chain subtable type5 (Glyph Insertion)" );
206
208
209 gxvalid->xstatetable.optdata =
210 et;
211 gxvalid->xstatetable.optdata_load_func =
213 gxvalid->xstatetable.subtable_setup_func =
215 gxvalid->xstatetable.entry_glyphoffset_fmt =
217 gxvalid->xstatetable.entry_validate_func =
219
220 gxv_XStateTable_validate( p, limit, gxvalid );
221
222 GXV_EXIT;
223 }
224
225
226/* END */
static int state
Definition: maze.c:121
r l[0]
Definition: byte_order.h:168
static unsigned char buff[32768]
Definition: fatten.c:17
#define FT_LOCAL_DEF(x)
Definition: ftconfig.h:388
#define FT_UNUSED(arg)
Definition: ftconfig.h:101
#define FT_NEXT_USHORT(buffer)
Definition: ftstream.h:226
#define FT_NEXT_ULONG(buffer)
Definition: ftstream.h:238
FT_BEGIN_HEADER typedef unsigned char FT_Bool
Definition: fttypes.h:108
unsigned long FT_ULong
Definition: fttypes.h:253
unsigned char FT_Byte
Definition: fttypes.h:154
unsigned short FT_UShort
Definition: fttypes.h:209
const FT_Byte * FT_Bytes
Definition: fttypes.h:165
#define FT_BOOL(x)
Definition: fttypes.h:578
GLuint GLuint GLsizei count
Definition: gl.h:1545
GLint limit
Definition: glext.h:10326
GLbitfield flags
Definition: glext.h:7161
GLfloat GLfloat p
Definition: glext.h:8902
gxv_set_length_by_ulong_offset(FT_ULong *offset, FT_ULong **length, FT_ULong *buff, FT_UInt nmemb, FT_ULong limit, GXV_Validator gxvalid)
Definition: gxvcommn.c:128
gxv_XStateTable_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvcommn.c:1554
#define GXV_NAME_ENTER(name)
Definition: gxvcommn.h:301
#define GXV_TRACE(s)
Definition: gxvcommn.h:304
@ GXV_GLYPHOFFSET_ULONG
Definition: gxvcommn.h:127
#define GXV_EXIT
Definition: gxvcommn.h:302
#define GXV_LIMIT_CHECK(_count)
Definition: gxvcommn.h:272
struct GXV_morx_subtable_type5_StateOptRec_ GXV_morx_subtable_type5_StateOptRec
static void gxv_morx_subtable_type5_InsertList_validate(FT_UShort table_index, FT_UShort count, FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmorx5.c:113
static void gxv_morx_subtable_type5_insertionGlyphList_load(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmorx5.c:66
#define GXV_MORX_SUBTABLE_TYPE5_HEADER_SIZE
Definition: gxvmorx5.c:61
gxv_morx_subtable_type5_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmorx5.c:195
static void gxv_morx_subtable_type5_subtable_setup(FT_ULong table_size, FT_ULong classTable, FT_ULong stateArray, FT_ULong entryTable, FT_ULong *classTable_length_p, FT_ULong *stateArray_length_p, FT_ULong *entryTable_length_p, GXV_Validator gxvalid)
Definition: gxvmorx5.c:82
static void gxv_morx_subtable_type5_entry_validate(FT_UShort state, FT_UShort flags, GXV_StateTable_GlyphOffsetCPtr glyphOffset_p, FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmorx5.c:141
struct GXV_morx_subtable_type5_StateOptRec_ * GXV_morx_subtable_type5_StateOptRecData
LOCAL int table_size
Definition: write.c:65
GXV_XStateTable_ValidatorRec xstatetable
Definition: gxvcommn.h:255