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      1 /*
      2  * Copyright  2011,2012  Google, Inc.
      3  *
      4  *  This is part of HarfBuzz, a text shaping library.
      5  *
      6  * Permission is hereby granted, without written agreement and without
      7  * license or royalty fees, to use, copy, modify, and distribute this
      8  * software and its documentation for any purpose, provided that the
      9  * above copyright notice and the following two paragraphs appear in
     10  * all copies of this software.
     11  *
     12  * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
     13  * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
     14  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
     15  * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
     16  * DAMAGE.
     17  *
     18  * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
     19  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
     20  * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
     21  * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
     22  * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
     23  *
     24  * Google Author(s): Behdad Esfahbod
     25  */
     26 
     27 #include "options.hh"
     28 
     29 #ifndef HB_MAIN_FONT_TEXT_HH
     30 #define HB_MAIN_FONT_TEXT_HH
     31 
     32 /* main() body for utilities taking font and processing text.*/
     33 
     34 static char *
     35 locale_to_utf8 (char *s)
     36 {
     37   char *t;
     38   GError *error = NULL;
     39 
     40   t = g_locale_to_utf8 (s, -1, NULL, NULL, &error);
     41   if (!t)
     42   {
     43      fail (true, "Failed converting text to UTF-8");
     44   }
     45 
     46   return t;
     47 }
     48 
     49 static hb_bool_t
     50 message_func (hb_buffer_t *buffer,
     51 	      hb_font_t *font,
     52 	      const char *message,
     53 	      void *user_data)
     54 {
     55   fprintf (stderr, "HB: %s\n", message);
     56   char buf[4096];
     57   hb_buffer_serialize_glyphs (buffer, 0, hb_buffer_get_length (buffer),
     58 			      buf, sizeof (buf), NULL,
     59 			      font,
     60 			      HB_BUFFER_SERIALIZE_FORMAT_TEXT,
     61 			      HB_BUFFER_SERIALIZE_FLAG_DEFAULT);
     62   printf ("HB: buffer [%s]\n", buf);
     63   return true;
     64 }
     65 
     66 template <typename consumer_t, int default_font_size, int subpixel_bits>
     67 struct main_font_text_t
     68 {
     69   main_font_text_t (void)
     70 		  : options ("[FONT-FILE] [TEXT]"),
     71 		    font_opts (&options, default_font_size, subpixel_bits),
     72 		    input (&options),
     73 		    consumer (&options) {}
     74 
     75   int
     76   main (int argc, char **argv)
     77   {
     78     options.parse (&argc, &argv);
     79 
     80     argc--, argv++;
     81     if (argc && !font_opts.font_file) font_opts.font_file = locale_to_utf8 (argv[0]), argc--, argv++;
     82     if (argc && !input.text && !input.text_file) input.text = locale_to_utf8 (argv[0]), argc--, argv++;
     83     if (argc)
     84       fail (true, "Too many arguments on the command line");
     85     if (!font_opts.font_file)
     86       options.usage ();
     87     if (!input.text && !input.text_file)
     88       input.text_file = g_strdup ("-");
     89 
     90     consumer.init (&font_opts);
     91 
     92     hb_buffer_t *buffer = hb_buffer_create ();
     93     if (debug)
     94       hb_buffer_set_message_func (buffer, message_func, NULL, NULL);
     95     unsigned int text_len;
     96     const char *text;
     97     while ((text = input.get_line (&text_len)))
     98       consumer.consume_line (buffer, text, text_len, input.text_before, input.text_after);
     99     hb_buffer_destroy (buffer);
    100 
    101     consumer.finish (&font_opts);
    102 
    103     return consumer.failed ? 1 : 0;
    104   }
    105 
    106   protected:
    107   option_parser_t options;
    108   font_options_t font_opts;
    109   text_options_t input;
    110   consumer_t consumer;
    111 };
    112 
    113 #endif
    114 
    115