ReactOS  0.4.15-dev-1197-g8081ba9
gxvmort5.c
Go to the documentation of this file.
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
102  FT_Bytes table,
103  FT_Bytes limit,
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  */
110  FT_Bytes p = table + offset;
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
144  FT_Byte state,
146  GXV_StateTable_GlyphOffsetCPtr glyphOffset,
147  FT_Bytes table,
148  FT_Bytes limit,
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 )
204  FT_Bytes limit,
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 */
gxv_StateTable_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvcommn.c:1208
gxv_mort_subtable_type5_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmort5.c:203
#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
#define GXV_MORT_SUBTABLE_TYPE5_HEADER_SIZE
Definition: gxvmort5.c:56
GLintptr offset
Definition: glext.h:5920
GLenum GLsizei GLenum GLenum const GLvoid * table
Definition: glext.h:5644
struct GXV_mort_subtable_type5_StateOptRec_ GXV_mort_subtable_type5_StateOptRec
GLint limit
Definition: glext.h:10326
FT_BEGIN_HEADER typedef unsigned char FT_Bool
Definition: fttypes.h:108
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
unsigned char FT_Byte
Definition: fttypes.h:154
smooth NULL
Definition: ftsmooth.c:416
#define GXV_EXIT
Definition: gxvcommn.h:302
#define FT_LOCAL_DEF(x)
Definition: ftconfig.h:388
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
if(!(yy_init))
Definition: macro.lex.yy.c:714
const FT_Byte * FT_Bytes
Definition: fttypes.h:165
GXV_StateTable_ValidatorRec statetable
Definition: gxvcommn.h:254
GLbitfield flags
Definition: glext.h:7161
static int state
Definition: maze.c:121
#define FT_BOOL(x)
Definition: fttypes.h:578
#define FT_NEXT_USHORT(buffer)
Definition: ftstream.h:226
struct GXV_mort_subtable_type5_StateOptRec_ * GXV_mort_subtable_type5_StateOptRecData
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_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
GLfloat GLfloat p
Definition: glext.h:8902
unsigned short FT_UShort
Definition: fttypes.h:209
#define FT_UNUSED(arg)
Definition: ftconfig.h:101
#define GXV_LIMIT_CHECK(_count)
Definition: gxvcommn.h:272
LOCAL int table_size
Definition: write.c:65