ReactOS  0.4.13-dev-544-gede3fdd
gxvprop.c
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1 /***************************************************************************/
2 /* */
3 /* gxvprop.c */
4 /* */
5 /* TrueTypeGX/AAT prop table validation (body). */
6 /* */
7 /* Copyright 2004-2018 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 "gxvalid.h"
29 #include "gxvcommn.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_gxvprop
40 
41 
42  /*************************************************************************/
43  /*************************************************************************/
44  /***** *****/
45  /***** Data and Types *****/
46  /***** *****/
47  /*************************************************************************/
48  /*************************************************************************/
49 
50 #define GXV_PROP_HEADER_SIZE ( 4 + 2 + 2 )
51 #define GXV_PROP_SIZE_MIN GXV_PROP_HEADER_SIZE
52 
53  typedef struct GXV_prop_DataRec_
54  {
56 
58 
59 #define GXV_PROP_DATA( field ) GXV_TABLE_DATA( prop, field )
60 
61 #define GXV_PROP_FLOATER 0x8000U
62 #define GXV_PROP_USE_COMPLEMENTARY_BRACKET 0x1000U
63 #define GXV_PROP_COMPLEMENTARY_BRACKET_OFFSET 0x0F00U
64 #define GXV_PROP_ATTACHING_TO_RIGHT 0x0080U
65 #define GXV_PROP_RESERVED 0x0060U
66 #define GXV_PROP_DIRECTIONALITY_CLASS 0x001FU
67 
68 
69  /*************************************************************************/
70  /*************************************************************************/
71  /***** *****/
72  /***** UTILITY FUNCTIONS *****/
73  /***** *****/
74  /*************************************************************************/
75  /*************************************************************************/
76 
77  static void
79  GXV_Validator gxvalid )
80  {
81  FT_Face face;
83  FT_GlyphSlot glyph;
84 
85 
86  GXV_NAME_ENTER( "zero advance" );
87 
88  face = gxvalid->face;
89 
91  gid,
93  if ( error )
95 
96  glyph = face->glyph;
97 
98  if ( glyph->advance.x != (FT_Pos)0 ||
99  glyph->advance.y != (FT_Pos)0 )
100  {
101  GXV_TRACE(( " found non-zero advance in zero-advance glyph\n" ));
103  }
104 
105  GXV_EXIT;
106  }
107 
108 
109  /* Pass 0 as GLYPH to check the default property */
110  static void
112  FT_UShort glyph,
113  GXV_Validator gxvalid )
114  {
115  if ( glyph != 0 && ( property & GXV_PROP_FLOATER ) )
116  gxv_prop_zero_advance_validate( glyph, gxvalid );
117 
119  {
121  char complement;
122 
123 
125  if ( offset == 0 )
126  {
127  GXV_TRACE(( " found zero offset to property\n" ));
129  }
130 
131  complement = (char)( offset >> 8 );
132  if ( complement & 0x08 )
133  {
134  /* Top bit is set: negative */
135 
136  /* Calculate the absolute offset */
137  complement = (char)( ( complement & 0x07 ) + 1 );
138 
139  /* The gid for complement must be greater than 0 */
140  if ( glyph <= complement )
141  {
142  GXV_TRACE(( " found non-positive glyph complement\n" ));
144  }
145  }
146  else
147  {
148  /* The gid for complement must be the face. */
149  gxv_glyphid_validate( (FT_UShort)( glyph + complement ), gxvalid );
150  }
151  }
152  else
153  {
155  GXV_TRACE(( "glyph %d cannot have complementary bracketing\n",
156  glyph ));
157  }
158 
159  /* this is introduced in version 2.0 */
161  {
162  if ( GXV_PROP_DATA( version ) == 0x00010000UL )
163  {
164  GXV_TRACE(( " found older version (1.0) in new version table\n" ));
166  }
167  }
168 
169  if ( property & GXV_PROP_RESERVED )
170  {
171  GXV_TRACE(( " found non-zero bits in reserved bits\n" ));
173  }
174 
175  if ( ( property & GXV_PROP_DIRECTIONALITY_CLASS ) > 11 )
176  {
177  /* TODO: Too restricted. Use the validation level. */
178  if ( GXV_PROP_DATA( version ) == 0x00010000UL ||
179  GXV_PROP_DATA( version ) == 0x00020000UL )
180  {
181  GXV_TRACE(( " found too old version in directionality class\n" ));
183  }
184  }
185  }
186 
187 
188  static void
190  GXV_LookupValueCPtr value_p,
191  GXV_Validator gxvalid )
192  {
193  gxv_prop_property_validate( value_p->u, glyph, gxvalid );
194  }
195 
196 
197  /*
198  +===============+ --------+
199  | lookup header | |
200  +===============+ |
201  | BinSrchHeader | |
202  +===============+ |
203  | lastGlyph[0] | |
204  +---------------+ |
205  | firstGlyph[0] | | head of lookup table
206  +---------------+ | +
207  | offset[0] | -> | offset [byte]
208  +===============+ | +
209  | lastGlyph[1] | | (glyphID - firstGlyph) * 2 [byte]
210  +---------------+ |
211  | firstGlyph[1] | |
212  +---------------+ |
213  | offset[1] | |
214  +===============+ |
215  |
216  ... |
217  |
218  16bit value array |
219  +===============+ |
220  | value | <-------+
221  ...
222  */
223 
224  static GXV_LookupValueDesc
226  GXV_LookupValueCPtr base_value_p,
227  FT_Bytes lookuptbl_limit,
228  GXV_Validator gxvalid )
229  {
230  FT_Bytes p;
231  FT_Bytes limit;
234 
235  /* XXX: check range? */
236  offset = (FT_UShort)( base_value_p->u +
237  relative_gindex * sizeof ( FT_UShort ) );
238  p = gxvalid->lookuptbl_head + offset;
239  limit = lookuptbl_limit;
240 
241  GXV_LIMIT_CHECK ( 2 );
242  value.u = FT_NEXT_USHORT( p );
243 
244  return value;
245  }
246 
247 
248  /*************************************************************************/
249  /*************************************************************************/
250  /***** *****/
251  /***** prop TABLE *****/
252  /***** *****/
253  /*************************************************************************/
254  /*************************************************************************/
255 
256  FT_LOCAL_DEF( void )
258  FT_Face face,
259  FT_Validator ftvalid )
260  {
261  FT_Bytes p = table;
262  FT_Bytes limit = 0;
263  GXV_ValidatorRec gxvalidrec;
264  GXV_Validator gxvalid = &gxvalidrec;
265 
266  GXV_prop_DataRec proprec;
267  GXV_prop_Data prop = &proprec;
268 
271  FT_UShort defaultProp;
272 
273 
274  gxvalid->root = ftvalid;
275  gxvalid->table_data = prop;
276  gxvalid->face = face;
277 
278  FT_TRACE3(( "validating `prop' table\n" ));
279  GXV_INIT;
280 
281  GXV_LIMIT_CHECK( 4 + 2 + 2 );
282  version = FT_NEXT_LONG( p );
283  format = FT_NEXT_USHORT( p );
284  defaultProp = FT_NEXT_USHORT( p );
285 
286  GXV_TRACE(( " version 0x%08x\n", version ));
287  GXV_TRACE(( " format 0x%04x\n", format ));
288  GXV_TRACE(( " defaultProp 0x%04x\n", defaultProp ));
289 
290  /* only versions 1.0, 2.0, 3.0 are defined (1996) */
291  if ( version != 0x00010000UL &&
292  version != 0x00020000UL &&
293  version != 0x00030000UL )
294  {
295  GXV_TRACE(( " found unknown version\n" ));
297  }
298 
299 
300  /* only formats 0x0000, 0x0001 are defined (1996) */
301  if ( format > 1 )
302  {
303  GXV_TRACE(( " found unknown format\n" ));
305  }
306 
307  gxv_prop_property_validate( defaultProp, 0, gxvalid );
308 
309  if ( format == 0 )
310  {
311  FT_TRACE3(( "(format 0, no per-glyph properties, "
312  "remaining %d bytes are skipped)", limit - p ));
313  goto Exit;
314  }
315 
316  /* format == 1 */
318 
322 
323  gxv_LookupTable_validate( p, limit, gxvalid );
324 
325  Exit:
326  FT_TRACE4(( "\n" ));
327  }
328 
329 
330 /* END */
struct GXV_prop_DataRec_ * GXV_prop_Data
int FT_Error
Definition: fttypes.h:300
FT_Pos y
Definition: ftimage.h:77
FT_BEGIN_HEADER typedef signed long FT_Pos
Definition: ftimage.h:58
static void gxv_prop_property_validate(FT_UShort property, FT_UShort glyph, GXV_Validator gxvalid)
Definition: gxvprop.c:111
#define FT_NEXT_LONG(buffer)
Definition: ftstream.h:235
#define error(str)
Definition: mkdosfs.c:1605
ActualNumberDriverObjects * sizeof(PDRIVER_OBJECT)) PDRIVER_OBJECT *DriverObjectList
FT_Pos x
Definition: ftimage.h:76
#define FT_INVALID_FORMAT
Definition: ftvalid.h:142
#define GXV_NAME_ENTER(name)
Definition: gxvcommn.h:301
union value::@475 u
#define GXV_PROP_COMPLEMENTARY_BRACKET_OFFSET
Definition: gxvprop.c:63
#define GXV_TRACE(s)
Definition: gxvcommn.h:304
gxv_prop_validate(FT_Bytes table, FT_Face face, FT_Validator ftvalid)
Definition: gxvprop.c:257
#define GXV_PROP_USE_COMPLEMENTARY_BRACKET
Definition: gxvprop.c:62
static void gxv_prop_zero_advance_validate(FT_UShort gid, GXV_Validator gxvalid)
Definition: gxvprop.c:78
GLintptr offset
Definition: glext.h:5920
gxv_glyphid_validate(FT_UShort gid, GXV_Validator gxvalid)
Definition: gxvcommn.c:813
#define GXV_PROP_DATA(field)
Definition: gxvprop.c:59
GLenum GLsizei GLenum GLenum const GLvoid * table
Definition: glext.h:5644
WORD face[3]
Definition: mesh.c:4747
FT_Vector advance
Definition: freetype.h:1919
GLint GLint GLsizei GLsizei GLsizei GLint GLenum format
Definition: gl.h:1546
GXV_LookupValue_SignSpec lookupval_sign
Definition: gxvcommn.h:246
GLint limit
Definition: glext.h:10326
GXV_Lookup_Fmt4_Transit_Func lookupfmt4_trans
Definition: gxvcommn.h:248
#define GXV_PROP_FLOATER
Definition: gxvprop.c:61
GXV_Lookup_Value_Validate_Func lookupval_func
Definition: gxvcommn.h:247
gxv_LookupTable_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvcommn.c:755
FT_Load_Glyph(FT_Face face, FT_UInt glyph_index, FT_Int32 load_flags)
Definition: ftobjs.c:760
#define FT_TRACE4(varformat)
Definition: ftdebug.h:161
void * table_data
Definition: gxvcommn.h:242
struct GXV_prop_DataRec_ GXV_prop_DataRec
static const WCHAR version[]
Definition: asmname.c:64
unsigned char
Definition: typeof.h:29
#define GXV_EXIT
Definition: gxvcommn.h:302
#define FT_LOCAL_DEF(x)
Definition: ftconfig.h:388
FT_Bytes lookuptbl_head
Definition: gxvcommn.h:249
#define GXV_PROP_RESERVED
Definition: gxvprop.c:65
FT_Validator root
Definition: gxvcommn.h:239
FT_Fixed version
Definition: gxvprop.c:55
static void gxv_prop_LookupValue_validate(FT_UShort glyph, GXV_LookupValueCPtr value_p, GXV_Validator gxvalid)
Definition: gxvprop.c:189
static void Exit(void)
Definition: sock.c:1331
typedefFT_BEGIN_HEADER struct FT_ValidatorRec_ volatile * FT_Validator
Definition: ftvalid.h:42
#define GXV_PROP_DIRECTIONALITY_CLASS
Definition: gxvprop.c:66
const FT_Byte * FT_Bytes
Definition: fttypes.h:165
GLsizei const GLfloat * value
Definition: glext.h:6069
#define FT_NEXT_USHORT(buffer)
Definition: ftstream.h:226
#define FT_TRACE3(varformat)
Definition: ftdebug.h:160
#define FT_INVALID_OFFSET
Definition: ftvalid.h:138
signed long FT_Fixed
Definition: fttypes.h:288
static GXV_LookupValueDesc gxv_prop_LookupFmt4_transit(FT_UShort relative_gindex, GXV_LookupValueCPtr base_value_p, FT_Bytes lookuptbl_limit, GXV_Validator gxvalid)
Definition: gxvprop.c:225
#define FT_INVALID_DATA
Definition: ftvalid.h:150
#define FT_INVALID_GLYPH_ID
Definition: ftvalid.h:146
GLfloat GLfloat p
Definition: glext.h:8902
#define FT_LOAD_IGNORE_TRANSFORM
Definition: freetype.h:3019
unsigned short FT_UShort
Definition: fttypes.h:209
#define GXV_INIT
Definition: gxvcommn.h:300
GLenum GLuint GLint GLenum face
Definition: glext.h:7025
#define GXV_PROP_ATTACHING_TO_RIGHT
Definition: gxvprop.c:64
#define GXV_LIMIT_CHECK(_count)
Definition: gxvcommn.h:272