ReactOS 0.4.15-dev-8102-g108db8f
gxvmort4.c
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1/***************************************************************************/
2/* */
3/* gxvmort4.c */
4/* */
5/* TrueTypeGX/AAT mort table validation */
6/* body for type4 (Non-Contextual Glyph Substitution) 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 static void
44 GXV_LookupValueCPtr value_p,
45 GXV_Validator gxvalid )
46 {
47 FT_UNUSED( glyph );
48
49 gxv_glyphid_validate( value_p->u, gxvalid );
50 }
51
52 /*
53 +===============+ --------+
54 | lookup header | |
55 +===============+ |
56 | BinSrchHeader | |
57 +===============+ |
58 | lastGlyph[0] | |
59 +---------------+ |
60 | firstGlyph[0] | | head of lookup table
61 +---------------+ | +
62 | offset[0] | -> | offset [byte]
63 +===============+ | +
64 | lastGlyph[1] | | (glyphID - firstGlyph) * 2 [byte]
65 +---------------+ |
66 | firstGlyph[1] | |
67 +---------------+ |
68 | offset[1] | |
69 +===============+ |
70 |
71 .... |
72 |
73 16bit value array |
74 +===============+ |
75 | value | <-------+
76 ....
77 */
78
81 FT_UShort relative_gindex,
82 GXV_LookupValueCPtr base_value_p,
83 FT_Bytes lookuptbl_limit,
84 GXV_Validator gxvalid )
85 {
86 FT_Bytes p;
90
91 /* XXX: check range? */
92 offset = (FT_UShort)( base_value_p->u +
93 relative_gindex * sizeof ( FT_UShort ) );
94
95 p = gxvalid->lookuptbl_head + offset;
96 limit = lookuptbl_limit;
97
98 GXV_LIMIT_CHECK( 2 );
99 value.u = FT_NEXT_USHORT( p );
100
101 return value;
102 }
103
104
105 FT_LOCAL_DEF( void )
108 GXV_Validator gxvalid )
109 {
110 FT_Bytes p = table;
111
112
113 GXV_NAME_ENTER( "mort chain subtable type4 "
114 "(Non-Contextual Glyph Substitution)" );
115
116 gxvalid->lookupval_sign = GXV_LOOKUPVALUE_UNSIGNED;
117 gxvalid->lookupval_func = gxv_mort_subtable_type4_lookupval_validate;
118 gxvalid->lookupfmt4_trans = gxv_mort_subtable_type4_lookupfmt4_transit;
119
120 gxv_LookupTable_validate( p, limit, gxvalid );
121
122 GXV_EXIT;
123 }
124
125
126/* END */
#define FT_LOCAL_DEF(x)
Definition: ftconfig.h:388
#define FT_UNUSED(arg)
Definition: ftconfig.h:101
#define FT_NEXT_USHORT(buffer)
Definition: ftstream.h:226
unsigned short FT_UShort
Definition: fttypes.h:209
const FT_Byte * FT_Bytes
Definition: fttypes.h:165
GLint limit
Definition: glext.h:10326
GLfloat GLfloat p
Definition: glext.h:8902
GLintptr offset
Definition: glext.h:5920
gxv_LookupTable_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvcommn.c:755
gxv_glyphid_validate(FT_UShort gid, GXV_Validator gxvalid)
Definition: gxvcommn.c:813
#define GXV_NAME_ENTER(name)
Definition: gxvcommn.h:301
@ GXV_LOOKUPVALUE_UNSIGNED
Definition: gxvcommn.h:100
#define GXV_EXIT
Definition: gxvcommn.h:302
#define GXV_LIMIT_CHECK(_count)
Definition: gxvcommn.h:272
gxv_mort_subtable_type4_validate(FT_Bytes table, FT_Bytes limit, GXV_Validator gxvalid)
Definition: gxvmort4.c:106
static GXV_LookupValueDesc gxv_mort_subtable_type4_lookupfmt4_transit(FT_UShort relative_gindex, GXV_LookupValueCPtr base_value_p, FT_Bytes lookuptbl_limit, GXV_Validator gxvalid)
Definition: gxvmort4.c:80
static void gxv_mort_subtable_type4_lookupval_validate(FT_UShort glyph, GXV_LookupValueCPtr value_p, GXV_Validator gxvalid)
Definition: gxvmort4.c:43
FT_Bytes lookuptbl_head
Definition: gxvcommn.h:249
Definition: pdh_main.c:94
ActualNumberDriverObjects * sizeof(PDRIVER_OBJECT)) PDRIVER_OBJECT *DriverObjectList