lib/tattfa.c

   1 /* tattfa.c */
   2
   3 /*
   4  * Copyright (C) 2014 by Werner Lemberg.
   5  *
   6  * This file is part of the ttfautohint library, and may only be used,
   7  * modified, and distributed under the terms given in `COPYING'.  By
   8  * continuing to use, modify, or distribute this file you indicate that you
   9  * have read `COPYING' and understand and accept it fully.
  10  *
  11  * The file `COPYING' mentioned in the previous paragraph is distributed
  12  * with the ttfautohint library.
  13  */
  14
  15
  16 #include "ta.h"
  17
  18
  19 FT_Error
  20 TA_table_build_TTFA(FT_Byte** TTFA,
  21                     FT_ULong* TTFA_len,
  22                     FONT* font)
  23 {
  24   FT_Byte* buf;
  25   FT_UInt buf_len;
  26
  27   FT_UInt len;
  28   FT_Byte* buf_new;
  29   FT_Byte* p;
  30
  31
  32   buf = (FT_Byte*)TA_font_dump_parameters(font, 0);
  33   if (!buf)
  34     return FT_Err_Out_Of_Memory;
  35   buf_len = strlen((char*)buf);
  36
  37   /* buffer length must be a multiple of four */
  38   len = (buf_len + 3) & ~3;
  39   buf_new = (FT_Byte*)realloc(buf, len);
  40   if (!buf_new)
  41   {
  42     free(buf);
  43     return FT_Err_Out_Of_Memory;
  44   }
  45   buf = buf_new;
  46
  47   /* pad end of buffer with zeros */
  48   p = buf + buf_len;
  49   switch (buf_len % 4)
  50   {
  51   case 1:
  52     *(p++) = 0x00;
  53   case 2:
  54     *(p++) = 0x00;
  55   case 3:
  56     *(p++) = 0x00;
  57   default:
  58     break;
  59   }
  60
  61   *TTFA = buf;
  62   *TTFA_len = buf_len;
  63
  64   return TA_Err_Ok;
  65 }
  66
  67
  68 /* end of tattfa.c */