lib/tafont.c

   1 /* tafont.c */
   2
   3 /*
   4  * Copyright (C) 2011-2016 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,
  38                              font->in_buf,
  39                              (FT_Long)font->in_len,
  40                              -1,
  41                              &f);
  42   if (error)
  43     return error;
  44   font->num_sfnts = f->num_faces;
  45   FT_Done_Face(f);
  46
  47   /* it is a TTC if we have more than a single subfont */
  48   font->sfnts = (SFNT*)calloc(1, (size_t)font->num_sfnts * sizeof (SFNT));
  49   if (!font->sfnts)
  50     return FT_Err_Out_Of_Memory;
  51
  52   return TA_Err_Ok;
  53 }
  54
  55
  56 void
  57 TA_font_unload(FONT* font,
  58                const char* in_buf,
  59                char** out_bufp,
  60                const char* control_buf)
  61 {
  62   /* in case of error it is expected that unallocated pointers */
  63   /* are NULL (and counters are zero) */
  64
  65   if (!font)
  66     return;
  67
  68   if (font->loader)
  69     ta_loader_done(font);
  70
  71   if (font->tables)
  72   {
  73     FT_ULong i;
  74
  75
  76     for (i = 0; i < font->num_tables; i++)
  77     {
  78       free(font->tables[i].buf);
  79       if (font->tables[i].data)
  80       {
  81         if (font->tables[i].tag == TTAG_glyf)
  82         {
  83           glyf_Data* data = (glyf_Data*)font->tables[i].data;
  84           FT_UShort j;
  85
  86
  87           for (j = 0; j < data->num_glyphs; j++)
  88           {
  89             free(data->glyphs[j].buf);
  90             free(data->glyphs[j].ins_buf);
  91             free(data->glyphs[j].ins_extra_buf);
  92             free(data->glyphs[j].components);
  93             free(data->glyphs[j].pointsums);
  94           }
  95           free(data->glyphs);
  96           free(data);
  97         }
  98       }
  99     }
 100     free(font->tables);
 101   }
 102
 103   if (font->sfnts)
 104   {
 105     FT_Long i;
 106
 107
 108     for (i = 0; i < font->num_sfnts; i++)
 109     {
 110       FT_Done_Face(font->sfnts[i].face);
 111       free(font->sfnts[i].table_infos);
 112     }
 113     free(font->sfnts);
 114   }
 115
 116   number_set_free(font->x_height_snapping_exceptions);
 117
 118   FT_Done_FreeType(font->lib);
 119
 120   /* in case the user provided file handles, */
 121   /* free the allocated buffers for the file contents */
 122   if (!in_buf)
 123     free(font->in_buf);
 124   if (!out_bufp)
 125     free(font->out_buf);
 126   if (!control_buf)
 127     free(font->control_buf);
 128   free(font);
 129 }
 130
 131 /* end of tafont.c */