ReactOS 0.4.15-dev-8127-g6338913
gxvopbd.c
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1/***************************************************************************/
2/* */
3/* gxvopbd.c */
4/* */
5/* TrueTypeGX/AAT opbd 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_gxvopbd
40
41
42 /*************************************************************************/
43 /*************************************************************************/
44 /***** *****/
45 /***** Data and Types *****/
46 /***** *****/
47 /*************************************************************************/
48 /*************************************************************************/
49
50 typedef struct GXV_opbd_DataRec_
51 {
54
56
57
58#define GXV_OPBD_DATA( FIELD ) GXV_TABLE_DATA( opbd, FIELD )
59
60
61 /*************************************************************************/
62 /*************************************************************************/
63 /***** *****/
64 /***** UTILITY FUNCTIONS *****/
65 /***** *****/
66 /*************************************************************************/
67 /*************************************************************************/
68
69 static void
71 GXV_LookupValueCPtr value_p,
72 GXV_Validator gxvalid )
73 {
74 /* offset in LookupTable is measured from the head of opbd table */
75 FT_Bytes p = gxvalid->root->base + value_p->u;
76 FT_Bytes limit = gxvalid->root->limit;
77 FT_Short delta_value;
78 int i;
79
80
81 if ( value_p->u < GXV_OPBD_DATA( valueOffset_min ) )
82 GXV_OPBD_DATA( valueOffset_min ) = value_p->u;
83
84 for ( i = 0; i < 4; i++ )
85 {
86 GXV_LIMIT_CHECK( 2 );
87 delta_value = FT_NEXT_SHORT( p );
88
89 if ( GXV_OPBD_DATA( format ) ) /* format 1, value is ctrl pt. */
90 {
91 if ( delta_value == -1 )
92 continue;
93
94 gxv_ctlPoint_validate( glyph, (FT_UShort)delta_value, gxvalid );
95 }
96 else /* format 0, value is distance */
97 continue;
98 }
99 }
100
101
102 /*
103 opbd ---------------------+
104 |
105 +===============+ |
106 | lookup header | |
107 +===============+ |
108 | BinSrchHeader | |
109 +===============+ |
110 | lastGlyph[0] | |
111 +---------------+ |
112 | firstGlyph[0] | | head of opbd sfnt table
113 +---------------+ | +
114 | offset[0] | -> | offset [byte]
115 +===============+ | +
116 | lastGlyph[1] | | (glyphID - firstGlyph) * 4 * sizeof(FT_Short) [byte]
117 +---------------+ |
118 | firstGlyph[1] | |
119 +---------------+ |
120 | offset[1] | |
121 +===============+ |
122 |
123 .... |
124 |
125 48bit value array |
126 +===============+ |
127 | value | <-------+
128 | |
129 | |
130 | |
131 +---------------+
132 .... */
133
136 GXV_LookupValueCPtr base_value_p,
137 FT_Bytes lookuptbl_limit,
138 GXV_Validator gxvalid )
139 {
141
142 FT_UNUSED( lookuptbl_limit );
143 FT_UNUSED( gxvalid );
144
145 /* XXX: check range? */
146 value.u = (FT_UShort)( base_value_p->u +
147 relative_gindex * 4 * sizeof ( FT_Short ) );
148
149 return value;
150 }
151
152
153 /*************************************************************************/
154 /*************************************************************************/
155 /***** *****/
156 /***** opbd TABLE *****/
157 /***** *****/
158 /*************************************************************************/
159 /*************************************************************************/
160
161 FT_LOCAL_DEF( void )
164 FT_Validator ftvalid )
165 {
166 GXV_ValidatorRec gxvalidrec;
167 GXV_Validator gxvalid = &gxvalidrec;
168 GXV_opbd_DataRec opbdrec;
169 GXV_opbd_Data opbd = &opbdrec;
170 FT_Bytes p = table;
171 FT_Bytes limit = 0;
172
174
175
176 gxvalid->root = ftvalid;
177 gxvalid->table_data = opbd;
178 gxvalid->face = face;
179
180 FT_TRACE3(( "validating `opbd' table\n" ));
181 GXV_INIT;
182 GXV_OPBD_DATA( valueOffset_min ) = 0xFFFFU;
183
184
185 GXV_LIMIT_CHECK( 4 + 2 );
188
189
190 /* only 0x00010000 is defined (1996) */
191 GXV_TRACE(( "(version=0x%08x)\n", version ));
192 if ( 0x00010000UL != version )
194
195 /* only values 0 and 1 are defined (1996) */
196 GXV_TRACE(( "(format=0x%04x)\n", GXV_OPBD_DATA( format ) ));
197 if ( 0x0001 < GXV_OPBD_DATA( format ) )
199
203
204 gxv_LookupTable_validate( p, limit, gxvalid );
205 p += gxvalid->subtable_length;
206
207 if ( p > table + GXV_OPBD_DATA( valueOffset_min ) )
208 {
209 GXV_TRACE((
210 "found overlap between LookupTable and opbd_value array\n" ));
212 }
213
214 FT_TRACE4(( "\n" ));
215 }
216
217
218/* END */
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_SHORT(buffer)
Definition: ftstream.h:223
#define FT_NEXT_ULONG(buffer)
Definition: ftstream.h:238
unsigned long FT_ULong
Definition: fttypes.h:253
unsigned short FT_UShort
Definition: fttypes.h:209
signed short FT_Short
Definition: fttypes.h:198
const FT_Byte * FT_Bytes
Definition: fttypes.h:165
#define FT_INVALID_FORMAT
Definition: ftvalid.h:142
#define FT_INVALID_OFFSET
Definition: ftvalid.h:138
typedefFT_BEGIN_HEADER struct FT_ValidatorRec_ volatile * FT_Validator
Definition: ftvalid.h:42
GLint GLint GLsizei GLsizei GLsizei GLint GLenum format
Definition: gl.h:1546
GLenum GLuint GLint GLenum face
Definition: glext.h:7025
GLint limit
Definition: glext.h:10326
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
gxv_ctlPoint_validate(FT_UShort gid, FT_UShort ctl_point, GXV_Validator gxvalid)
Definition: gxvcommn.c:846
gxv_LookupTable_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvcommn.c:755
@ GXV_LOOKUPVALUE_UNSIGNED
Definition: gxvcommn.h:100
#define GXV_TRACE(s)
Definition: gxvcommn.h:304
#define GXV_INIT
Definition: gxvcommn.h:300
#define GXV_LIMIT_CHECK(_count)
Definition: gxvcommn.h:272
gxv_opbd_validate(FT_Bytes table, FT_Face face, FT_Validator ftvalid)
Definition: gxvopbd.c:162
struct GXV_opbd_DataRec_ * GXV_opbd_Data
struct GXV_opbd_DataRec_ GXV_opbd_DataRec
static GXV_LookupValueDesc gxv_opbd_LookupFmt4_transit(FT_UShort relative_gindex, GXV_LookupValueCPtr base_value_p, FT_Bytes lookuptbl_limit, GXV_Validator gxvalid)
Definition: gxvopbd.c:135
static void gxv_opbd_LookupValue_validate(FT_UShort glyph, GXV_LookupValueCPtr value_p, GXV_Validator gxvalid)
Definition: gxvopbd.c:70
#define GXV_OPBD_DATA(FIELD)
Definition: gxvopbd.c:58
GXV_Lookup_Fmt4_Transit_Func lookupfmt4_trans
Definition: gxvcommn.h:248
FT_Validator root
Definition: gxvcommn.h:239
void * table_data
Definition: gxvcommn.h:242
FT_ULong subtable_length
Definition: gxvcommn.h:244
GXV_Lookup_Value_Validate_Func lookupval_func
Definition: gxvcommn.h:247
GXV_LookupValue_SignSpec lookupval_sign
Definition: gxvcommn.h:246
FT_UShort format
Definition: gxvopbd.c:52
FT_UShort valueOffset_min
Definition: gxvopbd.c:53
Definition: pdh_main.c:94
ActualNumberDriverObjects * sizeof(PDRIVER_OBJECT)) PDRIVER_OBJECT *DriverObjectList