1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
/* ftglue.c: Glue code for compiling the OpenType code from
* FreeType 1 using only the public API of FreeType 2
*
* By David Turner, The FreeType Project (www.freetype.org)
*
* This code is explicitely put in the public domain
*
* See ftglue.h for more information.
*/
#include "ftglue.h"
#if 0
#include <stdio.h>
#define LOG(x) ftglue_log x
static void
ftglue_log( const char* format, ... )
{
va_list ap;
va_start( ap, format );
vfprintf( stderr, format, ap );
va_end( ap );
}
#else
#define LOG(x) do {} while (0)
#endif
/* only used internally */
static FT_Pointer
ftglue_qalloc( FT_Memory memory,
FT_ULong size,
FT_Error *perror )
{
FT_Error error = 0;
FT_Pointer block = NULL;
if ( size > 0 )
{
block = memory->alloc( memory, size );
if ( !block )
error = FT_Err_Out_Of_Memory;
}
*perror = error;
return block;
}
#undef QALLOC /* just in case */
#define QALLOC(ptr,size) ( (ptr) = ftglue_qalloc( memory, (size), &error ), error != 0 )
#define FREE(_ptr) \
do { \
if ( (_ptr) ) \
{ \
ftglue_free( memory, _ptr ); \
_ptr = NULL; \
} \
} while (0)
static void
ftglue_free( FT_Memory memory,
FT_Pointer block )
{
if ( block )
memory->free( memory, block );
}
FTGLUE_APIDEF( FT_Long )
ftglue_stream_pos( FT_Stream stream )
{
LOG(( "ftglue:stream:pos() -> %ld\n", stream->pos ));
return stream->pos;
}
FTGLUE_APIDEF( FT_Error )
ftglue_stream_seek( FT_Stream stream,
FT_Long pos )
{
FT_Error error = 0;
if ( stream->read )
{
if ( stream->read( stream, pos, 0, 0 ) )
error = FT_Err_Invalid_Stream_Operation;
}
else if ( pos < 0 || (FT_ULong) pos > stream->size )
error = FT_Err_Invalid_Stream_Operation;
if ( !error )
stream->pos = pos;
LOG(( "ftglue:stream:seek(%ld) -> %d\n", pos, error ));
return error;
}
FTGLUE_APIDEF( FT_Error )
ftglue_stream_frame_enter( FT_Stream stream,
FT_ULong count )
{
FT_Error error = FT_Err_Ok;
FT_ULong read_bytes;
if ( stream->read )
{
/* allocate the frame in memory */
FT_Memory memory = stream->memory;
if ( QALLOC( stream->base, count ) )
goto Exit;
/* read it */
read_bytes = stream->read( stream, stream->pos,
stream->base, count );
if ( read_bytes < count )
{
FREE( stream->base );
error = FT_Err_Invalid_Stream_Operation;
}
stream->cursor = stream->base;
stream->limit = stream->cursor + count;
stream->pos += read_bytes;
}
else
{
/* check current and new position */
if ( stream->pos >= stream->size ||
stream->pos + count > stream->size )
{
error = FT_Err_Invalid_Stream_Operation;
goto Exit;
}
/* set cursor */
stream->cursor = stream->base + stream->pos;
stream->limit = stream->cursor + count;
stream->pos += count;
}
Exit:
LOG(( "ftglue:stream:frame_enter(%ld) -> %d\n", count, error ));
return error;
}
FTGLUE_APIDEF( void )
ftglue_stream_frame_exit( FT_Stream stream )
{
if ( stream->read )
{
FT_Memory memory = stream->memory;
FREE( stream->base );
}
stream->cursor = 0;
stream->limit = 0;
LOG(( "ftglue:stream:frame_exit()\n" ));
}
FTGLUE_APIDEF( FT_Error )
ftglue_face_goto_table( FT_Face face,
FT_ULong the_tag,
FT_Stream stream )
{
FT_Error error;
LOG(( "ftglue_face_goto_table( %p, %c%c%c%c, %p )\n",
face,
(int)((the_tag >> 24) & 0xFF),
(int)((the_tag >> 16) & 0xFF),
(int)((the_tag >> 8) & 0xFF),
(int)(the_tag & 0xFF),
stream ));
if ( !FT_IS_SFNT(face) )
{
LOG(( "not a SFNT face !!\n" ));
error = FT_Err_Invalid_Face_Handle;
}
else
{
/* parse the directory table directly, without using
* FreeType's built-in data structures
*/
FT_ULong offset = 0, sig;
FT_UInt count, nn;
if ( FILE_Seek( 0 ) || ACCESS_Frame( 4 ) )
goto Exit;
sig = GET_Tag4();
FORGET_Frame();
if ( sig == FT_MAKE_TAG( 't', 't', 'c', 'f' ) )
{
/* deal with TrueType collections */
LOG(( ">> This is a TrueType Collection\n" ));
if ( FILE_Seek( 12 + face->face_index*4 ) ||
ACCESS_Frame( 4 ) )
goto Exit;
offset = GET_ULong();
FORGET_Frame();
}
LOG(( "TrueType offset = %ld\n", offset ));
if ( FILE_Seek( offset+4 ) ||
ACCESS_Frame( 2 ) )
goto Exit;
count = GET_UShort();
FORGET_Frame();
if ( FILE_Seek( offset+12 ) ||
ACCESS_Frame( count*16 ) )
goto Exit;
for ( nn = 0; nn < count; nn++ )
{
FT_ULong tag = GET_ULong();
FT_ULong checksum = GET_ULong();
FT_ULong start = GET_ULong();
FT_ULong size = GET_ULong();
FT_UNUSED(checksum);
FT_UNUSED(size);
if ( tag == the_tag )
{
LOG(( "TrueType table (start: %ld) (size: %ld)\n", start, size ));
error = ftglue_stream_seek( stream, start );
goto FoundIt;
}
}
error = FT_Err_Table_Missing;
FoundIt:
FORGET_Frame();
}
Exit:
LOG(( "TrueType error=%d\n", error ));
return error;
}
#undef QALLOC
#define __ftglue__
#include "fcaliastail.h"
#undef __ftglue__
|
