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/*
* Copyright © 2011,2012 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and its documentation for any purpose, provided that the
* above copyright notice and the following two paragraphs appear in
* all copies of this software.
*
* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* Google Author(s): Behdad Esfahbod
*/
#ifndef HB_SHAPE_CONSUMER_HH
#define HB_SHAPE_CONSUMER_HH
#include "font-options.hh"
#include "shape-options.hh"
#include "text-options.hh"
template <typename output_t>
struct shape_consumer_t : shape_options_t
{
void add_options (option_parser_t *parser)
{
shape_options_t::add_options (parser);
output.add_options (parser);
}
template <typename app_t>
void init (const app_t *app)
{
failed = false;
buffer = hb_buffer_create ();
output.init (buffer, app);
}
template <typename app_t>
bool consume_line (app_t &app)
{
unsigned int text_len;
const char *text;
if (!(text = app.get_line (&text_len)))
return false;
output.new_line ();
for (unsigned int n = num_iterations; n; n--)
{
populate_buffer (buffer, text, text_len, app.text_before, app.text_after, app.font);
if (n == 1)
output.consume_text (buffer, text, text_len, utf8_clusters);
const char *error = nullptr;
if (!shape (app.font, buffer, &error))
{
failed = true;
output.error (error);
return true;
}
}
if (glyphs)
output.consume_glyphs (buffer, nullptr, 0, false);
else
output.consume_glyphs (buffer, text, text_len, utf8_clusters);
return true;
}
template <typename app_t>
void finish (const app_t *app)
{
output.finish (buffer, app);
hb_buffer_destroy (buffer);
buffer = nullptr;
}
public:
bool failed = false;
protected:
output_t output;
hb_buffer_t *buffer = nullptr;
};
#endif
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