Blame util/hb-shape.cc

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/*
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 * Copyright © 2010  Behdad Esfahbod
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 * Copyright © 2011,2012  Google, Inc.
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 *
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 *  This is part of HarfBuzz, a text shaping library.
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 *
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 * Permission is hereby granted, without written agreement and without
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 * license or royalty fees, to use, copy, modify, and distribute this
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 * software and its documentation for any purpose, provided that the
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 * above copyright notice and the following two paragraphs appear in
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 * all copies of this software.
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 *
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 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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 * DAMAGE.
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 *
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 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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 * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
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 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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 *
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 * Google Author(s): Behdad Esfahbod
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 */
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#include "main-font-text.hh"
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#include "shape-consumer.hh"
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struct output_buffer_t
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{
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  output_buffer_t (option_parser_t *parser)
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		  : options (parser, hb_buffer_serialize_list_formats ()),
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		    format (parser),
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		    gs (NULL),
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		    line_no (0),
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		    font (NULL),
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		    output_format (HB_BUFFER_SERIALIZE_FORMAT_INVALID),
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		    format_flags (HB_BUFFER_SERIALIZE_FLAG_DEFAULT) {}
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  void init (hb_buffer_t *buffer, const font_options_t *font_opts)
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  {
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    options.get_file_handle ();
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    gs = g_string_new (NULL);
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    line_no = 0;
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    font = hb_font_reference (font_opts->get_font ());
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    if (!options.output_format)
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      output_format = HB_BUFFER_SERIALIZE_FORMAT_TEXT;
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    else
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      output_format = hb_buffer_serialize_format_from_string (options.output_format, -1);
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    /* An empty "output_format" parameter basically skips output generating.
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     * Useful for benchmarking. */
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    if ((!options.output_format || *options.output_format) &&
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	!hb_buffer_serialize_format_to_string (output_format))
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    {
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      if (options.explicit_output_format)
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	fail (false, "Unknown output format `%s'; supported formats are: %s",
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	      options.output_format,
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	      g_strjoinv ("/", const_cast<char**> (options.supported_formats)));
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      else
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	/* Just default to TEXT if not explicitly requested and the
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	 * file extension is not recognized. */
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	output_format = HB_BUFFER_SERIALIZE_FORMAT_TEXT;
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    }
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    unsigned int flags = HB_BUFFER_SERIALIZE_FLAG_DEFAULT;
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    if (!format.show_glyph_names)
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      flags |= HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES;
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    if (!format.show_clusters)
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      flags |= HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS;
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    if (!format.show_positions)
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      flags |= HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS;
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    if (format.show_extents)
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      flags |= HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS;
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    format_flags = (hb_buffer_serialize_flags_t) flags;
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    if (format.trace)
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      hb_buffer_set_message_func (buffer, message_func, this, NULL);
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  }
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  void new_line (void)
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  {
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    line_no++;
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  }
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  void consume_text (hb_buffer_t  *buffer,
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		     const char   *text,
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		     unsigned int  text_len,
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		     hb_bool_t     utf8_clusters)
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  {
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    g_string_set_size (gs, 0);
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    format.serialize_buffer_of_text (buffer, line_no, text, text_len, font, gs);
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    fprintf (options.fp, "%s", gs->str);
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  }
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  void shape_failed (hb_buffer_t  *buffer,
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		     const char   *text,
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		     unsigned int  text_len,
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		     hb_bool_t     utf8_clusters)
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  {
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    g_string_set_size (gs, 0);
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    format.serialize_message (line_no, "msg: all shapers failed", gs);
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    fprintf (options.fp, "%s", gs->str);
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  }
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  void consume_glyphs (hb_buffer_t  *buffer,
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		       const char   *text,
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		       unsigned int  text_len,
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		       hb_bool_t     utf8_clusters)
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  {
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    g_string_set_size (gs, 0);
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    format.serialize_buffer_of_glyphs (buffer, line_no, text, text_len, font,
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				       output_format, format_flags, gs);
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    fprintf (options.fp, "%s", gs->str);
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  }
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  void finish (hb_buffer_t *buffer, const font_options_t *font_opts)
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  {
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    hb_buffer_set_message_func (buffer, NULL, NULL, NULL);
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    hb_font_destroy (font);
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    g_string_free (gs, true);
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    gs = NULL;
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    font = NULL;
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  }
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  static hb_bool_t
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  message_func (hb_buffer_t *buffer,
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		hb_font_t *font,
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		const char *message,
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		void *user_data)
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  {
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    output_buffer_t *that = (output_buffer_t *) user_data;
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    that->message (buffer, font, message);
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    return true;
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  }
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  void
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  message (hb_buffer_t *buffer,
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	   hb_font_t *font,
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	   const char *message)
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  {
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    g_string_set_size (gs, 0);
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    format.serialize_line_no (line_no, gs);
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    g_string_append_printf (gs, "HB: %s	buffer: ", message);
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    format.serialize_glyphs (buffer, font, output_format, format_flags, gs);
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    g_string_append_c (gs, '\n');
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    fprintf (options.fp, "%s", gs->str);
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  }
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  protected:
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  output_options_t options;
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  format_options_t format;
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  GString *gs;
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  unsigned int line_no;
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  hb_font_t *font;
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  hb_buffer_serialize_format_t output_format;
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  hb_buffer_serialize_flags_t format_flags;
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};
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int
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main (int argc, char **argv)
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{
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  main_font_text_t<shape_consumer_t<output_buffer_t>, FONT_SIZE_UPEM, 0> driver;
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  return driver.main (argc, argv);
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}