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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  {
70  FT_Bytes p = table;
71 
74 
75 
76  GXV_LIMIT_CHECK( 4 );
77  optdata->insertionGlyphList = FT_NEXT_ULONG( p );
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 
108  gxv_set_length_by_ulong_offset( o, l, buff, 4, table_size, gxvalid );
109  }
110 
111 
112  static void
115  FT_Bytes table,
116  FT_Bytes limit,
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,
145  FT_Bytes table,
146  FT_Bytes limit,
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 )
196  FT_Bytes limit,
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 */
unsigned long FT_ULong
Definition: fttypes.h:253
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
#define GXV_NAME_ENTER(name)
Definition: gxvcommn.h:301
#define GXV_TRACE(s)
Definition: gxvcommn.h:304
GLuint GLuint GLsizei count
Definition: gl.h:1545
GLenum GLsizei GLenum GLenum const GLvoid * table
Definition: glext.h:5644
static void gxv_morx_subtable_type5_insertionGlyphList_load(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmorx5.c:66
GLint limit
Definition: glext.h:10326
FT_BEGIN_HEADER typedef unsigned char FT_Bool
Definition: fttypes.h:108
unsigned char FT_Byte
Definition: fttypes.h:154
struct GXV_morx_subtable_type5_StateOptRec_ * GXV_morx_subtable_type5_StateOptRecData
#define GXV_EXIT
Definition: gxvcommn.h:302
#define FT_LOCAL_DEF(x)
Definition: ftconfig.h:388
r l[0]
Definition: byte_order.h:167
const FT_Byte * FT_Bytes
Definition: fttypes.h:165
GLbitfield flags
Definition: glext.h:7161
#define GXV_MORX_SUBTABLE_TYPE5_HEADER_SIZE
Definition: gxvmorx5.c:61
struct GXV_morx_subtable_type5_StateOptRec_ GXV_morx_subtable_type5_StateOptRec
static int state
Definition: maze.c:121
gxv_morx_subtable_type5_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmorx5.c:195
#define FT_BOOL(x)
Definition: fttypes.h:578
#define FT_NEXT_USHORT(buffer)
Definition: ftstream.h:226
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
#define FT_NEXT_ULONG(buffer)
Definition: ftstream.h:238
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_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
GLfloat GLfloat p
Definition: glext.h:8902
unsigned short FT_UShort
Definition: fttypes.h:209
#define FT_UNUSED(arg)
Definition: ftconfig.h:101
static unsigned char buff[32768]
Definition: fatten.c:17
GXV_XStateTable_ValidatorRec xstatetable
Definition: gxvcommn.h:255
#define GXV_LIMIT_CHECK(_count)
Definition: gxvcommn.h:272
gxv_XStateTable_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvcommn.c:1554
LOCAL int table_size
Definition: write.c:65