ReactOS 0.4.15-dev-7674-gc0b4db1
gxvmort.c
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1/***************************************************************************/
2/* */
3/* gxvmort.c */
4/* */
5/* TrueTypeGX/AAT mort 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 "gxvmort.h"
29#include "gxvfeat.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 static void
44 GXV_Validator gxvalid )
45 {
46 if ( f->featureType >= gxv_feat_registry_length )
47 {
48 GXV_TRACE(( "featureType %d is out of registered range, "
49 "setting %d is unchecked\n",
50 f->featureType, f->featureSetting ));
52 }
53 else if ( !gxv_feat_registry[f->featureType].existence )
54 {
55 GXV_TRACE(( "featureType %d is within registered area "
56 "but undefined, setting %d is unchecked\n",
57 f->featureType, f->featureSetting ));
59 }
60 else
61 {
62 FT_Byte nSettings_max;
63
64
65 /* nSettings in gxvfeat.c is halved for exclusive on/off settings */
66 nSettings_max = gxv_feat_registry[f->featureType].nSettings;
67 if ( gxv_feat_registry[f->featureType].exclusive )
68 nSettings_max = (FT_Byte)( 2 * nSettings_max );
69
70 GXV_TRACE(( "featureType %d is registered", f->featureType ));
71 GXV_TRACE(( "setting %d", f->featureSetting ));
72
73 if ( f->featureSetting > nSettings_max )
74 {
75 GXV_TRACE(( "out of defined range %d", nSettings_max ));
77 }
78 GXV_TRACE(( "\n" ));
79 }
80
81 /* TODO: enableFlags must be unique value in specified chain? */
82 }
83
84
85 /*
86 * nFeatureFlags is typed to FT_ULong to accept that in
87 * mort (typed FT_UShort) and morx (typed FT_ULong).
88 */
89 FT_LOCAL_DEF( void )
92 FT_ULong nFeatureFlags,
93 GXV_Validator gxvalid )
94 {
96 FT_ULong i;
97
99
100
101 GXV_NAME_ENTER( "mort feature list" );
102 for ( i = 0; i < nFeatureFlags; i++ )
103 {
104 GXV_LIMIT_CHECK( 2 + 2 + 4 + 4 );
105 f.featureType = FT_NEXT_USHORT( p );
106 f.featureSetting = FT_NEXT_USHORT( p );
107 f.enableFlags = FT_NEXT_ULONG( p );
108 f.disableFlags = FT_NEXT_ULONG( p );
109
110 gxv_mort_feature_validate( &f, gxvalid );
111 }
112
113 if ( !IS_GXV_MORT_FEATURE_OFF( f ) )
115
116 gxvalid->subtable_length = (FT_ULong)( p - table );
117 GXV_EXIT;
118 }
119
120
121 FT_LOCAL_DEF( void )
123 GXV_Validator gxvalid )
124 {
125 FT_UNUSED( gxvalid );
126
127#ifdef FT_DEBUG_LEVEL_TRACE
128 if ( coverage & 0x8000U )
129 GXV_TRACE(( " this subtable is for vertical text only\n" ));
130 else
131 GXV_TRACE(( " this subtable is for horizontal text only\n" ));
132
133 if ( coverage & 0x4000 )
134 GXV_TRACE(( " this subtable is applied to glyph array "
135 "in descending order\n" ));
136 else
137 GXV_TRACE(( " this subtable is applied to glyph array "
138 "in ascending order\n" ));
139
140 if ( coverage & 0x2000 )
141 GXV_TRACE(( " this subtable is forcibly applied to "
142 "vertical/horizontal text\n" ));
143
144 if ( coverage & 0x1FF8 )
145 GXV_TRACE(( " coverage has non-zero bits in reserved area\n" ));
146#endif
147 }
148
149
150 static void
153 FT_UShort nSubtables,
154 GXV_Validator gxvalid )
155 {
156 FT_Bytes p = table;
157
158 GXV_Validate_Func fmt_funcs_table[] =
159 {
163 NULL, /* 3 */
166
167 };
168
169 FT_UShort i;
170
171
172 GXV_NAME_ENTER( "subtables in a chain" );
173
174 for ( i = 0; i < nSubtables; i++ )
175 {
177
179 FT_UShort coverage;
180#ifdef GXV_LOAD_UNUSED_VARS
181 FT_ULong subFeatureFlags;
182#endif
184 FT_UInt rest;
185
186
187 GXV_LIMIT_CHECK( 2 + 2 + 4 );
189 coverage = FT_NEXT_USHORT( p );
190#ifdef GXV_LOAD_UNUSED_VARS
191 subFeatureFlags = FT_NEXT_ULONG( p );
192#else
193 p += 4;
194#endif
195
196 GXV_TRACE(( "validating chain subtable %d/%d (%d bytes)\n",
197 i + 1, nSubtables, length ));
198 type = coverage & 0x0007;
199 rest = length - ( 2 + 2 + 4 );
200
201 GXV_LIMIT_CHECK( rest );
202 gxv_mort_coverage_validate( coverage, gxvalid );
203
204 if ( type > 5 )
206
207 func = fmt_funcs_table[type];
208 if ( !func )
209 GXV_TRACE(( "morx type %d is reserved\n", type ));
210
211 func( p, p + rest, gxvalid );
212
213 p += rest;
214 /* TODO: validate subFeatureFlags */
215 }
216
217 gxvalid->subtable_length = (FT_ULong)( p - table );
218
219 GXV_EXIT;
220 }
221
222
223 static void
226 GXV_Validator gxvalid )
227 {
228 FT_Bytes p = table;
229#ifdef GXV_LOAD_UNUSED_VARS
230 FT_ULong defaultFlags;
231#endif
232 FT_ULong chainLength;
233 FT_UShort nFeatureFlags;
234 FT_UShort nSubtables;
235
236
237 GXV_NAME_ENTER( "mort chain header" );
238
239 GXV_LIMIT_CHECK( 4 + 4 + 2 + 2 );
240#ifdef GXV_LOAD_UNUSED_VARS
241 defaultFlags = FT_NEXT_ULONG( p );
242#else
243 p += 4;
244#endif
245 chainLength = FT_NEXT_ULONG( p );
246 nFeatureFlags = FT_NEXT_USHORT( p );
247 nSubtables = FT_NEXT_USHORT( p );
248
249 gxv_mort_featurearray_validate( p, table + chainLength,
250 nFeatureFlags, gxvalid );
251 p += gxvalid->subtable_length;
252 gxv_mort_subtables_validate( p, table + chainLength, nSubtables, gxvalid );
253 gxvalid->subtable_length = chainLength;
254
255 /* TODO: validate defaultFlags */
256 GXV_EXIT;
257 }
258
259
260 FT_LOCAL_DEF( void )
263 FT_Validator ftvalid )
264 {
265 GXV_ValidatorRec gxvalidrec;
266 GXV_Validator gxvalid = &gxvalidrec;
267 FT_Bytes p = table;
268 FT_Bytes limit = 0;
270 FT_ULong nChains;
271 FT_ULong i;
272
273
274 gxvalid->root = ftvalid;
275 gxvalid->face = face;
276 limit = gxvalid->root->limit;
277
278 FT_TRACE3(( "validating `mort' table\n" ));
279 GXV_INIT;
280
281 GXV_LIMIT_CHECK( 4 + 4 );
283 nChains = FT_NEXT_ULONG( p );
284
285 if (version != 0x00010000UL)
287
288 for ( i = 0; i < nChains; i++ )
289 {
290 GXV_TRACE(( "validating chain %d/%d\n", i + 1, nChains ));
292 gxv_mort_chain_validate( p, limit, gxvalid );
293 p += gxvalid->subtable_length;
294 }
295
296 FT_TRACE4(( "\n" ));
297 }
298
299
300/* END */
#define NULL
Definition: types.h:112
WORD face[3]
Definition: mesh.c:4747
static const WCHAR version[]
Definition: asmname.c:66
#define FT_LOCAL_DEF(x)
Definition: ftconfig.h:388
#define FT_UNUSED(arg)
Definition: ftconfig.h:101
#define FT_TRACE3(varformat)
Definition: ftdebug.h:160
#define FT_TRACE4(varformat)
Definition: ftdebug.h:161
#define FT_NEXT_USHORT(buffer)
Definition: ftstream.h:226
#define FT_NEXT_ULONG(buffer)
Definition: ftstream.h:238
unsigned long FT_ULong
Definition: fttypes.h:253
unsigned char FT_Byte
Definition: fttypes.h:154
unsigned short FT_UShort
Definition: fttypes.h:209
unsigned int FT_UInt
Definition: fttypes.h:231
const FT_Byte * FT_Bytes
Definition: fttypes.h:165
#define FT_INVALID_FORMAT
Definition: ftvalid.h:142
#define FT_INVALID_DATA
Definition: ftvalid.h:150
typedefFT_BEGIN_HEADER struct FT_ValidatorRec_ volatile * FT_Validator
Definition: ftvalid.h:42
GLuint GLuint GLsizei GLenum type
Definition: gl.h:1545
GLenum func
Definition: glext.h:6028
GLenum GLuint GLint GLenum face
Definition: glext.h:7025
GLfloat f
Definition: glext.h:7540
GLint limit
Definition: glext.h:10326
GLuint GLsizei GLsizei * length
Definition: glext.h:6040
GLfloat GLfloat p
Definition: glext.h:8902
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
void(* GXV_Validate_Func)(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvcommn.h:82
#define GXV_32BIT_ALIGNMENT_VALIDATE(a)
Definition: gxvcommn.h:317
#define GXV_NAME_ENTER(name)
Definition: gxvcommn.h:301
#define GXV_SET_ERR_IF_PARANOID(err)
Definition: gxvcommn.h:66
#define GXV_TRACE(s)
Definition: gxvcommn.h:304
#define GXV_INIT
Definition: gxvcommn.h:300
#define GXV_EXIT
Definition: gxvcommn.h:302
#define GXV_LIMIT_CHECK(_count)
Definition: gxvcommn.h:272
static GX_Feature_RegistryRec gxv_feat_registry[]
Definition: gxvfeat.h:60
#define gxv_feat_registry_length
Definition: gxvfeat.h:55
static void gxv_mort_feature_validate(GXV_mort_feature f, GXV_Validator gxvalid)
Definition: gxvmort.c:43
gxv_mort_coverage_validate(FT_UShort coverage, GXV_Validator gxvalid)
Definition: gxvmort.c:122
static void gxv_mort_subtables_validate(FT_Bytes table, FT_Bytes limit, FT_UShort nSubtables, GXV_Validator gxvalid)
Definition: gxvmort.c:151
gxv_mort_validate(FT_Bytes table, FT_Face face, FT_Validator ftvalid)
Definition: gxvmort.c:261
gxv_mort_featurearray_validate(FT_Bytes table, FT_Bytes limit, FT_ULong nFeatureFlags, GXV_Validator gxvalid)
Definition: gxvmort.c:90
static void gxv_mort_chain_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmort.c:224
gxv_mort_subtable_type1_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmort1.c:225
gxv_mort_subtable_type0_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmort0.c:127
#define GXV_MORT_FEATURE_OFF
Definition: gxvmort.h:46
gxv_mort_subtable_type4_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmort4.c:106
gxv_mort_subtable_type2_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmort2.c:277
gxv_mort_subtable_type5_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmort5.c:203
#define IS_GXV_MORT_FEATURE_OFF(f)
Definition: gxvmort.h:48
FT_Validator root
Definition: gxvcommn.h:239
FT_ULong subtable_length
Definition: gxvcommn.h:244