ReactOS 0.4.15-dev-7677-g8209aa5
gxvmort5.c
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1/***************************************************************************/
2/* */
3/* gxvmort5.c */
4/* */
5/* TrueTypeGX/AAT mort 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 "gxvmort.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_gxvmort
40
41
42 /*
43 * mort subtable type5 (Contextual Glyph Insertion)
44 * has the format of StateTable with insertion-glyph-list,
45 * but without name. The offset is given by glyphOffset in
46 * entryTable. There is no table location declaration
47 * like xxxTable.
48 */
49
51 {
55
56#define GXV_MORT_SUBTABLE_TYPE5_HEADER_SIZE GXV_STATETABLE_HEADER_SIZE
57
61
64
65
66 FT_LOCAL_DEF( void )
68 FT_UShort classTable,
69 FT_UShort stateArray,
70 FT_UShort entryTable,
71 FT_UShort* classTable_length_p,
72 FT_UShort* stateArray_length_p,
73 FT_UShort* entryTable_length_p,
74 GXV_Validator gxvalid )
75 {
77 (GXV_mort_subtable_type5_StateOptRecData)gxvalid->statetable.optdata;
78
79
81 classTable,
82 stateArray,
83 entryTable,
84 classTable_length_p,
85 stateArray_length_p,
86 entryTable_length_p,
87 gxvalid );
88
89 optdata->classTable = classTable;
90 optdata->stateArray = stateArray;
91 optdata->entryTable = entryTable;
92
93 optdata->classTable_length_p = classTable_length_p;
94 optdata->stateArray_length_p = stateArray_length_p;
95 optdata->entryTable_length_p = entryTable_length_p;
96 }
97
98
99 static void
104 GXV_Validator gxvalid )
105 {
106 /*
107 * We don't know the range of insertion-glyph-list.
108 * Set range by whole of state table.
109 */
111
114
115 if ( optdata->classTable < offset &&
116 offset < optdata->classTable + *(optdata->classTable_length_p) )
117 GXV_TRACE(( " offset runs into ClassTable" ));
118 if ( optdata->stateArray < offset &&
119 offset < optdata->stateArray + *(optdata->stateArray_length_p) )
120 GXV_TRACE(( " offset runs into StateArray" ));
121 if ( optdata->entryTable < offset &&
122 offset < optdata->entryTable + *(optdata->entryTable_length_p) )
123 GXV_TRACE(( " offset runs into EntryTable" ));
124
125#ifndef GXV_LOAD_TRACE_VARS
126 GXV_LIMIT_CHECK( count * 2 );
127#else
128 while ( p < table + offset + ( count * 2 ) )
129 {
130 FT_UShort insert_glyphID;
131
132
133 GXV_LIMIT_CHECK( 2 );
134 insert_glyphID = FT_NEXT_USHORT( p );
135 GXV_TRACE(( " 0x%04x", insert_glyphID ));
136 }
137 GXV_TRACE(( "\n" ));
138#endif
139 }
140
141
142 static void
149 GXV_Validator gxvalid )
150 {
151#ifdef GXV_LOAD_UNUSED_VARS
152 FT_Bool setMark;
153 FT_Bool dontAdvance;
154 FT_Bool currentIsKashidaLike;
155 FT_Bool markedIsKashidaLike;
156 FT_Bool currentInsertBefore;
157 FT_Bool markedInsertBefore;
158#endif
159 FT_Byte currentInsertCount;
160 FT_Byte markedInsertCount;
161 FT_UShort currentInsertList;
162 FT_UShort markedInsertList;
163
164 FT_UNUSED( state );
165
166
167#ifdef GXV_LOAD_UNUSED_VARS
168 setMark = FT_BOOL( ( flags >> 15 ) & 1 );
169 dontAdvance = FT_BOOL( ( flags >> 14 ) & 1 );
170 currentIsKashidaLike = FT_BOOL( ( flags >> 13 ) & 1 );
171 markedIsKashidaLike = FT_BOOL( ( flags >> 12 ) & 1 );
172 currentInsertBefore = FT_BOOL( ( flags >> 11 ) & 1 );
173 markedInsertBefore = FT_BOOL( ( flags >> 10 ) & 1 );
174#endif
175
176 currentInsertCount = (FT_Byte)( ( flags >> 5 ) & 0x1F );
177 markedInsertCount = (FT_Byte)( flags & 0x001F );
178
179 currentInsertList = (FT_UShort)( glyphOffset->ul >> 16 );
180 markedInsertList = (FT_UShort)( glyphOffset->ul );
181
182 if ( 0 != currentInsertList && 0 != currentInsertCount )
183 {
185 currentInsertCount,
186 table,
187 limit,
188 gxvalid );
189 }
190
191 if ( 0 != markedInsertList && 0 != markedInsertCount )
192 {
194 markedInsertCount,
195 table,
196 limit,
197 gxvalid );
198 }
199 }
200
201
202 FT_LOCAL_DEF( void )
205 GXV_Validator gxvalid )
206 {
207 FT_Bytes p = table;
208
211
212
213 GXV_NAME_ENTER( "mort chain subtable type5 (Glyph Insertion)" );
214
216
217 gxvalid->statetable.optdata =
218 et;
219 gxvalid->statetable.optdata_load_func =
220 NULL;
221 gxvalid->statetable.subtable_setup_func =
223 gxvalid->statetable.entry_glyphoffset_fmt =
225 gxvalid->statetable.entry_validate_func =
227
228 gxv_StateTable_validate( p, limit, gxvalid );
229
230 GXV_EXIT;
231 }
232
233
234/* END */
static int state
Definition: maze.c:121
#define NULL
Definition: types.h:112
#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
FT_BEGIN_HEADER typedef unsigned char FT_Bool
Definition: fttypes.h:108
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
GLintptr offset
Definition: glext.h:5920
gxv_StateTable_subtable_setup(FT_UShort table_size, FT_UShort classTable, FT_UShort stateArray, FT_UShort entryTable, FT_UShort *classTable_length_p, FT_UShort *stateArray_length_p, FT_UShort *entryTable_length_p, GXV_Validator gxvalid)
Definition: gxvcommn.c:1182
gxv_StateTable_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvcommn.c:1208
#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_mort_subtable_type5_StateOptRec_ * GXV_mort_subtable_type5_StateOptRecData
#define GXV_MORT_SUBTABLE_TYPE5_HEADER_SIZE
Definition: gxvmort5.c:56
gxv_mort_subtable_type5_subtable_setup(FT_UShort table_size, FT_UShort classTable, FT_UShort stateArray, FT_UShort entryTable, FT_UShort *classTable_length_p, FT_UShort *stateArray_length_p, FT_UShort *entryTable_length_p, GXV_Validator gxvalid)
Definition: gxvmort5.c:67
gxv_mort_subtable_type5_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmort5.c:203
static void gxv_mort_subtable_type5_entry_validate(FT_Byte state, FT_UShort flags, GXV_StateTable_GlyphOffsetCPtr glyphOffset, FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmort5.c:143
static void gxv_mort_subtable_type5_InsertList_validate(FT_UShort offset, FT_UShort count, FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmort5.c:100
struct GXV_mort_subtable_type5_StateOptRec_ GXV_mort_subtable_type5_StateOptRec
if(dx< 0)
Definition: linetemp.h:194
LOCAL int table_size
Definition: write.c:65
GXV_StateTable_ValidatorRec statetable
Definition: gxvcommn.h:254