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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 *
locale_to_utf8(char * s)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
message_func(hb_buffer_t * buffer,hb_font_t * font,const char * message,void * user_data)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 {
main_font_text_tmain_font_text_t69   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
mainmain_font_text_t76   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