102 lines
2.7 KiB
C++
102 lines
2.7 KiB
C++
/*
|
|
* 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 "hb-private.hh"
|
|
#include "options.hh"
|
|
|
|
|
|
template <typename output_t>
|
|
struct shape_consumer_t
|
|
{
|
|
shape_consumer_t (option_parser_t *parser)
|
|
: failed (false),
|
|
shaper (parser),
|
|
output (parser),
|
|
font (nullptr),
|
|
buffer (nullptr) {}
|
|
|
|
void init (hb_buffer_t *buffer_,
|
|
const font_options_t *font_opts)
|
|
{
|
|
font = hb_font_reference (font_opts->get_font ());
|
|
failed = false;
|
|
buffer = hb_buffer_reference (buffer_);
|
|
|
|
output.init (buffer, font_opts);
|
|
}
|
|
void consume_line (const char *text,
|
|
unsigned int text_len,
|
|
const char *text_before,
|
|
const char *text_after)
|
|
{
|
|
output.new_line ();
|
|
|
|
for (unsigned int n = shaper.num_iterations; n; n--)
|
|
{
|
|
const char *error = nullptr;
|
|
|
|
shaper.populate_buffer (buffer, text, text_len, text_before, text_after);
|
|
if (n == 1)
|
|
output.consume_text (buffer, text, text_len, shaper.utf8_clusters);
|
|
if (!shaper.shape (font, buffer, &error))
|
|
{
|
|
failed = true;
|
|
output.error (error);
|
|
if (hb_buffer_get_content_type (buffer) == HB_BUFFER_CONTENT_TYPE_GLYPHS)
|
|
break;
|
|
else
|
|
return;
|
|
}
|
|
}
|
|
|
|
output.consume_glyphs (buffer, text, text_len, shaper.utf8_clusters);
|
|
}
|
|
void finish (const font_options_t *font_opts)
|
|
{
|
|
output.finish (buffer, font_opts);
|
|
hb_font_destroy (font);
|
|
font = nullptr;
|
|
hb_buffer_destroy (buffer);
|
|
buffer = nullptr;
|
|
}
|
|
|
|
public:
|
|
bool failed;
|
|
|
|
protected:
|
|
shape_options_t shaper;
|
|
output_t output;
|
|
|
|
hb_font_t *font;
|
|
hb_buffer_t *buffer;
|
|
};
|
|
|
|
|
|
#endif
|