harfbuzz/util/hb-shape.cc

168 lines
5.4 KiB
C++

/*
* Copyright © 2010 Behdad Esfahbod
* 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 "batch.hh"
#include "font-options.hh"
#include "main-font-text.hh"
#include "output-options.hh"
#include "shape-consumer.hh"
#include "shape-format.hh"
#include "text-options.hh"
const unsigned DEFAULT_FONT_SIZE = FONT_SIZE_UPEM;
const unsigned SUBPIXEL_BITS = 0;
struct output_buffer_t : output_options_t<>
{
void add_options (option_parser_t *parser)
{
parser->set_summary ("Shape text with given font.");
output_options_t::add_options (parser, hb_buffer_serialize_list_formats ());
format.add_options (parser);
}
void init (hb_buffer_t *buffer, const font_options_t *font_opts)
{
gs = g_string_new (nullptr);
line_no = 0;
font = hb_font_reference (font_opts->font);
if (!output_format)
serialize_format = HB_BUFFER_SERIALIZE_FORMAT_TEXT;
else
serialize_format = hb_buffer_serialize_format_from_string (output_format, -1);
/* An empty "output_format" parameter basically skips output generating.
* Useful for benchmarking. */
if ((!output_format || *output_format) &&
!hb_buffer_serialize_format_to_string (serialize_format))
{
if (explicit_output_format)
fail (false, "Unknown output format `%s'; supported formats are: %s",
output_format,
g_strjoinv ("/", const_cast<char**> (hb_buffer_serialize_list_formats ())));
else
/* Just default to TEXT if not explicitly requested and the
* file extension is not recognized. */
serialize_format = HB_BUFFER_SERIALIZE_FORMAT_TEXT;
}
unsigned int flags = HB_BUFFER_SERIALIZE_FLAG_DEFAULT;
if (!format.show_glyph_names)
flags |= HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES;
if (!format.show_clusters)
flags |= HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS;
if (!format.show_positions)
flags |= HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS;
if (!format.show_advances)
flags |= HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES;
if (format.show_extents)
flags |= HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS;
if (format.show_flags)
flags |= HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS;
serialize_flags = (hb_buffer_serialize_flags_t) flags;
if (format.trace)
hb_buffer_set_message_func (buffer, message_func, this, nullptr);
}
void new_line () { line_no++; }
void consume_text (hb_buffer_t *buffer,
const char *text,
unsigned int text_len,
hb_bool_t utf8_clusters)
{
g_string_set_size (gs, 0);
format.serialize_buffer_of_text (buffer, line_no, text, text_len, font, gs);
fprintf (out_fp, "%s", gs->str);
}
void error (const char *message)
{
g_string_set_size (gs, 0);
format.serialize_message (line_no, "error", message, gs);
fprintf (out_fp, "%s", gs->str);
}
void consume_glyphs (hb_buffer_t *buffer,
const char *text,
unsigned int text_len,
hb_bool_t utf8_clusters)
{
g_string_set_size (gs, 0);
format.serialize_buffer_of_glyphs (buffer, line_no, text, text_len, font,
serialize_format, serialize_flags, gs);
fprintf (out_fp, "%s", gs->str);
}
void finish (hb_buffer_t *buffer, const font_options_t *font_opts)
{
hb_buffer_set_message_func (buffer, nullptr, nullptr, nullptr);
hb_font_destroy (font);
g_string_free (gs, true);
gs = nullptr;
font = nullptr;
}
static hb_bool_t
message_func (hb_buffer_t *buffer,
hb_font_t *font,
const char *message,
void *user_data)
{
output_buffer_t *that = (output_buffer_t *) user_data;
that->trace (buffer, font, message);
return true;
}
void
trace (hb_buffer_t *buffer,
hb_font_t *font,
const char *message)
{
g_string_set_size (gs, 0);
format.serialize_line_no (line_no, gs);
g_string_append_printf (gs, "trace: %s buffer: ", message);
format.serialize (buffer, font, serialize_format, serialize_flags, gs);
g_string_append_c (gs, '\n');
fprintf (out_fp, "%s", gs->str);
}
protected:
shape_format_options_t format;
GString *gs = nullptr;
unsigned int line_no = 0;
hb_font_t *font = nullptr;
hb_buffer_serialize_format_t serialize_format = HB_BUFFER_SERIALIZE_FORMAT_INVALID;
hb_buffer_serialize_flags_t serialize_flags = HB_BUFFER_SERIALIZE_FLAG_DEFAULT;
};
int
main (int argc, char **argv)
{
using main_t = main_font_text_t<shape_consumer_t<output_buffer_t>, font_options_t, shape_text_options_t>;
return batch_main<main_t> (argc, argv);
}