lib/tafont.c

   1 /* tafont.c */
   2
   3 /*
   4  * Copyright (C) 2011-2013 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 {
  57   /* in case of error it is expected that unallocated pointers */
  58   /* are NULL (and counters are zero) */
  59
  60   if (!font)
  61     return;
  62
  63   if (font->loader)
  64     ta_loader_done(font);
  65
  66   if (font->tables)
  67   {
  68     FT_ULong i;
  69
  70
  71     for (i = 0; i < font->num_tables; i++)
  72     {
  73       free(font->tables[i].buf);
  74       if (font->tables[i].data)
  75       {
  76         if (font->tables[i].tag == TTAG_glyf)
  77         {
  78           glyf_Data* data = (glyf_Data*)font->tables[i].data;
  79           FT_UShort j;
  80
  81
  82           for (j = 0; j < data->num_glyphs; j++)
  83           {
  84             free(data->glyphs[j].buf);
  85             free(data->glyphs[j].ins_buf);
  86             free(data->glyphs[j].components);
  87             free(data->glyphs[j].pointsums);
  88           }
  89           free(data->glyphs);
  90           free(data);
  91         }
  92       }
  93     }
  94     free(font->tables);
  95   }
  96
  97   if (font->sfnts)
  98   {
  99     FT_Long i;
 100
 101
 102     for (i = 0; i < font->num_sfnts; i++)
 103     {
 104       FT_Done_Face(font->sfnts[i].face);
 105       free(font->sfnts[i].table_infos);
 106     }
 107     free(font->sfnts);
 108   }
 109
 110   number_set_free(font->x_height_snapping_exceptions);
 111
 112   FT_Done_FreeType(font->lib);
 113   if (!in_buf)
 114     free(font->in_buf);
 115   if (!out_bufp)
 116     free(font->out_buf);
 117   free(font);
 118 }
 119
 120 /* end of tafont.c */