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_SHAPE_CONSUMER_HH
30#define HB_SHAPE_CONSUMER_HH
31
32
33template <typename output_t>
34struct shape_consumer_t
35{
36  shape_consumer_t (option_parser_t *parser)
37		  : shaper (parser),
38		    output (parser) {}
39
40  void init (const font_options_t *font_opts)
41  {
42    font = hb_font_reference (font_opts->get_font ());
43    output.init (font_opts);
44    failed = false;
45  }
46  void consume_line (hb_buffer_t  *buffer,
47		     const char   *text,
48		     unsigned int  text_len,
49		     const char   *text_before,
50		     const char   *text_after)
51  {
52    output.new_line ();
53
54    shaper.populate_buffer (buffer, text, text_len, text_before, text_after);
55    output.consume_text (buffer, text, text_len, shaper.utf8_clusters);
56
57    if (!shaper.shape (font, buffer)) {
58      failed = true;
59      hb_buffer_set_length (buffer, 0);
60      output.shape_failed (buffer, text, text_len, shaper.utf8_clusters);
61      return;
62    }
63
64    output.consume_glyphs (buffer, text, text_len, shaper.utf8_clusters);
65  }
66  void finish (const font_options_t *font_opts)
67  {
68    output.finish (font_opts);
69    hb_font_destroy (font);
70    font = NULL;
71  }
72
73  public:
74  bool failed;
75
76  protected:
77  shape_options_t shaper;
78  output_t output;
79
80  hb_font_t *font;
81};
82
83
84#endif
85