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gxvmorx.c
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1 /***************************************************************************/
2 /* */
3 /* gxvmorx.c */
4 /* */
5 /* TrueTypeGX/AAT morx table validation (body). */
6 /* */
7 /* Copyright 2005-2018 by */
8 /* 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 "gxvmorx.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_gxvmorx
39 
40 
41  static void
44  FT_UShort nSubtables,
45  GXV_Validator gxvalid )
46  {
47  FT_Bytes p = table;
48 
49  GXV_Validate_Func fmt_funcs_table[] =
50  {
54  NULL, /* 3 */
57 
58  };
59 
60  FT_UShort i;
61 
62 
63  GXV_NAME_ENTER( "subtables in a chain" );
64 
65  for ( i = 0; i < nSubtables; i++ )
66  {
68 
70  FT_ULong coverage;
71 #ifdef GXV_LOAD_UNUSED_VARS
72  FT_ULong subFeatureFlags;
73 #endif
74  FT_ULong type;
75  FT_ULong rest;
76 
77 
78  GXV_LIMIT_CHECK( 4 + 4 + 4 );
79  length = FT_NEXT_ULONG( p );
80  coverage = FT_NEXT_ULONG( p );
81 #ifdef GXV_LOAD_UNUSED_VARS
82  subFeatureFlags = FT_NEXT_ULONG( p );
83 #else
84  p += 4;
85 #endif
86 
87  GXV_TRACE(( "validating chain subtable %d/%d (%d bytes)\n",
88  i + 1, nSubtables, length ));
89 
90  type = coverage & 0x0007;
91  rest = length - ( 4 + 4 + 4 );
92  GXV_LIMIT_CHECK( rest );
93 
94  /* morx coverage consists of mort_coverage & 16bit padding */
95  gxv_mort_coverage_validate( (FT_UShort)( ( coverage >> 16 ) | coverage ),
96  gxvalid );
97  if ( type > 5 )
99 
100  func = fmt_funcs_table[type];
101  if ( !func )
102  GXV_TRACE(( "morx type %d is reserved\n", type ));
103 
104  func( p, p + rest, gxvalid );
105 
106  /* TODO: subFeatureFlags should be unique in a table? */
107  p += rest;
108  }
109 
110  gxvalid->subtable_length = (FT_ULong)( p - table );
111 
112  GXV_EXIT;
113  }
114 
115 
116  static void
118  FT_Bytes limit,
119  GXV_Validator gxvalid )
120  {
121  FT_Bytes p = table;
122 #ifdef GXV_LOAD_UNUSED_VARS
123  FT_ULong defaultFlags;
124 #endif
125  FT_ULong chainLength;
126  FT_ULong nFeatureFlags;
127  FT_ULong nSubtables;
128 
129 
130  GXV_NAME_ENTER( "morx chain header" );
131 
132  GXV_LIMIT_CHECK( 4 + 4 + 4 + 4 );
133 #ifdef GXV_LOAD_UNUSED_VARS
134  defaultFlags = FT_NEXT_ULONG( p );
135 #else
136  p += 4;
137 #endif
138  chainLength = FT_NEXT_ULONG( p );
139  nFeatureFlags = FT_NEXT_ULONG( p );
140  nSubtables = FT_NEXT_ULONG( p );
141 
142  /* feature-array of morx is same with that of mort */
143  gxv_mort_featurearray_validate( p, limit, nFeatureFlags, gxvalid );
144  p += gxvalid->subtable_length;
145 
146  if ( nSubtables >= 0x10000L )
148 
149  gxv_morx_subtables_validate( p, table + chainLength,
150  (FT_UShort)nSubtables, gxvalid );
151 
152  gxvalid->subtable_length = chainLength;
153 
154  /* TODO: defaultFlags should be compared with the flags in tables */
155 
156  GXV_EXIT;
157  }
158 
159 
160  FT_LOCAL_DEF( void )
162  FT_Face face,
163  FT_Validator ftvalid )
164  {
165  GXV_ValidatorRec gxvalidrec;
166  GXV_Validator gxvalid = &gxvalidrec;
167  FT_Bytes p = table;
168  FT_Bytes limit = 0;
170  FT_ULong nChains;
171  FT_ULong i;
172 
173 
174  gxvalid->root = ftvalid;
175  gxvalid->face = face;
176 
177  FT_TRACE3(( "validating `morx' table\n" ));
178  GXV_INIT;
179 
180  GXV_LIMIT_CHECK( 4 + 4 );
181  version = FT_NEXT_ULONG( p );
182  nChains = FT_NEXT_ULONG( p );
183 
184  if ( version != 0x00020000UL )
186 
187  for ( i = 0; i < nChains; i++ )
188  {
189  GXV_TRACE(( "validating chain %d/%d\n", i + 1, nChains ));
191  gxv_morx_chain_validate( p, limit, gxvalid );
192  p += gxvalid->subtable_length;
193  }
194 
195  FT_TRACE4(( "\n" ));
196  }
197 
198 
199 /* END */
GLenum func
Definition: glext.h:6028
unsigned long FT_ULong
Definition: fttypes.h:253
static void gxv_morx_chain_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmorx.c:117
gxv_morx_subtable_type2_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmorx2.c:296
#define FT_INVALID_FORMAT
Definition: ftvalid.h:142
#define GXV_NAME_ENTER(name)
Definition: gxvcommn.h:301
#define GXV_TRACE(s)
Definition: gxvcommn.h:304
gxv_morx_subtable_type1_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmorx1.c:241
GLuint GLuint GLsizei GLenum type
Definition: gl.h:1545
GLenum GLsizei GLenum GLenum const GLvoid * table
Definition: glext.h:5644
void(* GXV_Validate_Func)(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvcommn.h:82
WORD face[3]
Definition: mesh.c:4747
GLint limit
Definition: glext.h:10326
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
#define FT_TRACE4(varformat)
Definition: ftdebug.h:161
smooth NULL
Definition: ftsmooth.c:416
static const WCHAR version[]
Definition: asmname.c:66
#define GXV_EXIT
Definition: gxvcommn.h:302
#define FT_LOCAL_DEF(x)
Definition: ftconfig.h:388
static void gxv_morx_subtables_validate(FT_Bytes table, FT_Bytes limit, FT_UShort nSubtables, GXV_Validator gxvalid)
Definition: gxvmorx.c:42
FT_Validator root
Definition: gxvcommn.h:239
gxv_mort_coverage_validate(FT_UShort coverage, GXV_Validator gxvalid)
Definition: gxvmort.c:122
GLenum GLuint GLenum GLsizei length
Definition: glext.h:5579
typedefFT_BEGIN_HEADER struct FT_ValidatorRec_ volatile * FT_Validator
Definition: ftvalid.h:42
#define GXV_32BIT_ALIGNMENT_VALIDATE(a)
Definition: gxvcommn.h:317
const FT_Byte * FT_Bytes
Definition: fttypes.h:165
#define FT_TRACE3(varformat)
Definition: ftdebug.h:160
#define FT_NEXT_ULONG(buffer)
Definition: ftstream.h:238
gxv_mort_featurearray_validate(FT_Bytes table, FT_Bytes limit, FT_ULong nFeatureFlags, GXV_Validator gxvalid)
Definition: gxvmort.c:90
#define FT_INVALID_DATA
Definition: ftvalid.h:150
FT_ULong subtable_length
Definition: gxvcommn.h:244
gxv_morx_subtable_type4_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmorx4.c:43
GLfloat GLfloat p
Definition: glext.h:8902
unsigned short FT_UShort
Definition: fttypes.h:209
#define GXV_INIT
Definition: gxvcommn.h:300
gxv_morx_subtable_type5_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmorx5.c:195
GLenum GLuint GLint GLenum face
Definition: glext.h:7025
#define GXV_LIMIT_CHECK(_count)
Definition: gxvcommn.h:272
gxv_morx_validate(FT_Bytes table, FT_Face face, FT_Validator ftvalid)
Definition: gxvmorx.c:161
gxv_morx_subtable_type0_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmorx0.c:87