lib/tafont.c

   1 /* tafont.c */
   2
   3 /*
   4  * Copyright (C) 2011-2014 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_font_init(FONT* font)
  21 {
  22   FT_Error error;
  23   FT_Face f;
  24   FT_Int major, minor, patch;
  25
  26
  27   error = FT_Init_FreeType(&font->lib);
  28   if (error)
  29     return error;
  30
  31   /* assure correct FreeType version to avoid using the wrong DLL */
  32   FT_Library_Version(font->lib, &major, &minor, &patch);
  33   if (((major*1000 + minor)*1000 + patch) < 2004005)
  34     return TA_Err_Invalid_FreeType_Version;
  35
  36   /* get number of faces (i.e. subfonts) */
  37   error = FT_New_Memory_Face(font->lib, font->in_buf, font->in_len, -1, &f);
  38   if (error)
  39     return error;
  40   font->num_sfnts = f->num_faces;
  41   FT_Done_Face(f);
  42
  43   /* it is a TTC if we have more than a single subfont */
  44   font->sfnts = (SFNT*)calloc(1, font->num_sfnts * sizeof (SFNT));
  45   if (!font->sfnts)
  46     return FT_Err_Out_Of_Memory;
  47
  48   return TA_Err_Ok;
  49 }
  50
  51
  52 void
  53 TA_font_unload(FONT* font,
  54                const char* in_buf,
  55                char** out_bufp,
  56                const char* control_buf)
  57 {
  58   /* in case of error it is expected that unallocated pointers */
  59   /* are NULL (and counters are zero) */
  60
  61   if (!font)
  62     return;
  63
  64   if (font->loader)
  65     ta_loader_done(font);
  66
  67   if (font->tables)
  68   {
  69     FT_ULong i;
  70
  71
  72     for (i = 0; i < font->num_tables; i++)
  73     {
  74       free(font->tables[i].buf);
  75       if (font->tables[i].data)
  76       {
  77         if (font->tables[i].tag == TTAG_glyf)
  78         {
  79           glyf_Data* data = (glyf_Data*)font->tables[i].data;
  80           FT_UShort j;
  81
  82
  83           for (j = 0; j < data->num_glyphs; j++)
  84           {
  85             free(data->glyphs[j].buf);
  86             free(data->glyphs[j].ins_buf);
  87             free(data->glyphs[j].components);
  88             free(data->glyphs[j].pointsums);
  89           }
  90           free(data->glyphs);
  91           free(data);
  92         }
  93       }
  94     }
  95     free(font->tables);
  96   }
  97
  98   if (font->sfnts)
  99   {
 100     FT_Long i;
 101
 102
 103     for (i = 0; i < font->num_sfnts; i++)
 104     {
 105       FT_Done_Face(font->sfnts[i].face);
 106       free(font->sfnts[i].table_infos);
 107     }
 108     free(font->sfnts);
 109   }
 110
 111   number_set_free(font->x_height_snapping_exceptions);
 112
 113   FT_Done_FreeType(font->lib);
 114
 115   /* in case the user provided file handles, */
 116   /* free the allocated buffers for the file contents */
 117   if (!in_buf)
 118     free(font->in_buf);
 119   if (!out_bufp)
 120     free(font->out_buf);
 121   if (!control_buf)
 122     free(font->control_buf);
 123   free(font);
 124 }
 125
 126 /* end of tafont.c */