File: ttload.c

package info (click to toggle)
ghostscript 8.71~dfsg2-9+squeeze1
  • links: PTS, VCS
  • area: main
  • in suites: squeeze
  • size: 79,896 kB
  • ctags: 80,654
  • sloc: ansic: 501,432; sh: 25,689; python: 4,853; cpp: 3,633; perl: 3,597; tcl: 1,480; makefile: 1,187; lisp: 407; asm: 284; xml: 263; awk: 66; csh: 17; yacc: 15
file content (229 lines) | stat: -rw-r--r-- 6,577 bytes parent folder | download | duplicates (3)
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
/* Copyright (C) 2001-2006 Artifex Software, Inc.
   All Rights Reserved.
  
   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied, modified
   or distributed except as expressly authorized under the terms of that
   license.  Refer to licensing information at http://www.artifex.com/
   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/

/* $Id: ttload.c 8022 2007-06-05 22:23:38Z giles $ */

/* Changes after FreeType: cut out the TrueType instruction interpreter. */

/*******************************************************************
 *
 *  ttload.c                                                    1.0
 *
 *    TrueType Tables Loader.                          
 *
 *  Copyright 1996-1998 by
 *  David Turner, Robert Wilhelm, and Werner Lemberg.
 *
 *  This file is part of the FreeType project, and may only be used
 *  modified and distributed under the terms of the FreeType project
 *  license, LICENSE.TXT.  By continuing to use, modify, or distribute
 *  this file you indicate that you have read the license and
 *  understand and accept it fully.
 *
 ******************************************************************/

#include "ttmisc.h"

#include "ttfoutl.h"
#include "tttypes.h"
#include "ttcalc.h"
#include "ttobjs.h"
#include "ttload.h"
#include "ttfinp.h"

#ifdef DEBUG
#  define DebugTrace( font, fmt )  (void)(!font->DebugPrint ? 0 : font->DebugPrint(font, fmt))
#  define DebugTrace1( font, fmt, x)  (void)(!font->DebugPrint ? 0 : font->DebugPrint(font, fmt, x))
#else
#  define DebugTrace( font, fmt )
#  define DebugTrace1( font, fmt, x)
#endif

/*******************************************************************
 *
 *  Function    :  Load_TrueType_MaxProfile
 *
 *  Description :  Loads the maxp table into face table.
 *
 *  Input  :  face     face table to look for
 *
 *  Output :  Error code.
 *
 ******************************************************************/

  TT_Error  Load_TrueType_MaxProfile( PFace  face )
  {
    ttfReader *r = face->r;
    ttfFont *font = face->font;
    PMaxProfile  maxProfile = &face->maxProfile;

    r->Seek(r, font->t_maxp.nPos);

    DebugTrace(font, "MaxProfile " );

    /* read frame data into face table */
    maxProfile->version               = GET_ULong();

    maxProfile->numGlyphs             = GET_UShort();

    maxProfile->maxPoints             = GET_UShort();
    maxProfile->maxContours           = GET_UShort();
    maxProfile->maxCompositePoints    = GET_UShort();
    maxProfile->maxCompositeContours  = GET_UShort();

    maxProfile->maxZones              = GET_UShort();
    maxProfile->maxTwilightPoints     = GET_UShort();

    maxProfile->maxStorage            = GET_UShort();
    maxProfile->maxFunctionDefs       = GET_UShort();
    maxProfile->maxInstructionDefs    = GET_UShort();
    maxProfile->maxStackElements      = GET_UShort();
    maxProfile->maxSizeOfInstructions = GET_UShort();
    maxProfile->maxComponentElements  = GET_UShort();
    maxProfile->maxComponentDepth     = GET_UShort();

    face->numGlyphs     = maxProfile->numGlyphs;

    face->maxPoints     = MAX( maxProfile->maxCompositePoints, 
                               maxProfile->maxPoints );
    face->maxContours   = MAX( maxProfile->maxCompositeContours,
                               maxProfile->maxContours );
    face->maxComponents = maxProfile->maxComponentElements +
                          maxProfile->maxComponentDepth;

    DebugTrace(font, "loaded\n");
  
    return TT_Err_Ok;
  }

/*******************************************************************
 *
 *  Function    :  Load_TrueType_CVT
 *
 *  Description :  Loads cvt table into resident table.
 *
 *  Input  :  face     face table to look for
 *
 *  Output :  Error code.
 *
 ******************************************************************/

  TT_Error  Load_TrueType_CVT( PFace  face )
  {
    long  n;
    Int  limit;

    ttfReader *r = face->r;
    ttfFont *font = face->font;
    ttfMemory *mem = font->tti->ttf_memory;
    r->Seek(r, font->t_cvt_.nPos);


    face->cvt=NULL;

    DebugTrace(font, "CVT ");

    face->cvtSize = font->t_cvt_.nLen / 2;

#   if 0
    if(face->cvtSize < 300)
      face->cvtSize = 300; /* Work around DynaLab bug in DingBat1. */
#   endif

    if(face->cvtSize > 0) {  /* allow fonts with a CVT table */
	face->cvt = mem->alloc_bytes(mem, face->cvtSize * sizeof(Short), "Load_TrueType_CVT");
	if (!face->cvt)
	    return TT_Err_Out_Of_Memory;
    }


    limit = face->cvtSize;

    for ( n = 0; n < limit && !r->Eof(r); n++ )
      face->cvt[n] = GET_Short();

    DebugTrace(font, "loaded\n");

    return TT_Err_Ok;
  }


/*******************************************************************
 *
 *  Function    :  Load_TrueType_Programs
 *
 *  Description :  Loads the font (fpgm) and cvt programs into the
 *                 face table.
 *
 *  Input  :  face
 *
 *  Output :  Error code.
 *
 ******************************************************************/

  TT_Error  Load_TrueType_Programs( PFace  face )
  {
    ttfReader *r = face->r;
    ttfFont *font = face->font;
    ttfMemory *mem = font->tti->ttf_memory;

    face->fontProgram = NULL;
    face->cvtProgram = NULL;


    DebugTrace(font, "Font program ");

    /* The font program is optional */
    if(!font->t_fpgm.nPos)
    {
      face->fontProgram = (Byte*)NULL;
      face->fontPgmSize = 0;

      DebugTrace(font, "is absent.\n");
    }
    else
    {
      face->fontPgmSize = font->t_fpgm.nLen;
      r->Seek(r, font->t_fpgm.nPos);
      face->fontProgram = mem->alloc_bytes(mem, face->fontPgmSize, "Load_TrueType_Programs");

      if (!face->fontProgram)
        return TT_Err_Out_Of_Memory;
      r->Read(r, face->fontProgram,face->fontPgmSize );
      DebugTrace1(font, "loaded, %12d bytes\n", face->fontPgmSize);
    }

    DebugTrace(font, "Prep program ");

    if (!font->t_prep.nPos)
    {
      face->cvtProgram = (Byte*)NULL;
      face->cvtPgmSize = 0;

      DebugTrace(font, "is missing!\n");
    }
    else
    { face->cvtPgmSize=font->t_prep.nLen;
      r->Seek(r, font->t_prep.nPos);
      face->cvtProgram = mem->alloc_bytes(mem, face->cvtPgmSize, "Load_TrueType_Programs");
      if (!face->cvtProgram)
        return TT_Err_Out_Of_Memory;
      r->Read(r, face->cvtProgram,face->cvtPgmSize );
      DebugTrace1(font, "loaded, %12d bytes\n", face->cvtPgmSize );
    }

    return TT_Err_Ok;
  }