HarfBuzz text shaping engine
http://harfbuzz.github.io/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
96 lines
2.6 KiB
96 lines
2.6 KiB
/* |
|
* 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 |
|
*/ |
|
|
|
#include "options.hh" |
|
|
|
#ifndef HB_SHAPE_CONSUMER_HH |
|
#define HB_SHAPE_CONSUMER_HH |
|
|
|
|
|
template <typename output_t> |
|
struct shape_consumer_t |
|
{ |
|
shape_consumer_t (option_parser_t *parser) |
|
: failed (false), |
|
shaper (parser), |
|
output (parser), |
|
font (NULL), |
|
buffer (NULL) {} |
|
|
|
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--) |
|
{ |
|
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)) |
|
{ |
|
failed = true; |
|
hb_buffer_set_length (buffer, 0); |
|
output.shape_failed (buffer, text, text_len, shaper.utf8_clusters); |
|
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 = NULL; |
|
hb_buffer_destroy (buffer); |
|
buffer = NULL; |
|
} |
|
|
|
public: |
|
bool failed; |
|
|
|
protected: |
|
shape_options_t shaper; |
|
output_t output; |
|
|
|
hb_font_t *font; |
|
hb_buffer_t *buffer; |
|
}; |
|
|
|
|
|
#endif
|
|
|