469 lines
13 KiB
C++
469 lines
13 KiB
C++
/*
|
|
* Copyright © 2012,2013 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 "hb-buffer-private.hh"
|
|
|
|
|
|
static const char *serialize_formats[] = {
|
|
"text",
|
|
"json",
|
|
NULL
|
|
};
|
|
|
|
/**
|
|
* hb_buffer_serialize_list_formats:
|
|
*
|
|
* Returns a list of supported buffer serialization formats.
|
|
*
|
|
* Return value: (transfer none):
|
|
* A string array of buffer serialization formats. Should not be freed.
|
|
*
|
|
* Since: 0.9.7
|
|
**/
|
|
const char **
|
|
hb_buffer_serialize_list_formats (void)
|
|
{
|
|
return serialize_formats;
|
|
}
|
|
|
|
/**
|
|
* hb_buffer_serialize_format_from_string:
|
|
* @str: (array length=len) (element-type uint8_t): a string to parse
|
|
* @len: length of @str, or -1 if string is %NULL terminated
|
|
*
|
|
* Parses a string into an #hb_buffer_serialize_format_t. Does not check if
|
|
* @str is a valid buffer serialization format, use
|
|
* hb_buffer_serialize_list_formats() to get the list of supported formats.
|
|
*
|
|
* Return value:
|
|
* The parsed #hb_buffer_serialize_format_t.
|
|
*
|
|
* Since: 0.9.7
|
|
**/
|
|
hb_buffer_serialize_format_t
|
|
hb_buffer_serialize_format_from_string (const char *str, int len)
|
|
{
|
|
/* Upper-case it. */
|
|
return (hb_buffer_serialize_format_t) (hb_tag_from_string (str, len) & ~0x20202020u);
|
|
}
|
|
|
|
/**
|
|
* hb_buffer_serialize_format_to_string:
|
|
* @format: an #hb_buffer_serialize_format_t to convert.
|
|
*
|
|
* Converts @format to the string corresponding it, or %NULL if it is not a valid
|
|
* #hb_buffer_serialize_format_t.
|
|
*
|
|
* Return value: (transfer none):
|
|
* A %NULL terminated string corresponding to @format. Should not be freed.
|
|
*
|
|
* Since: 0.9.7
|
|
**/
|
|
const char *
|
|
hb_buffer_serialize_format_to_string (hb_buffer_serialize_format_t format)
|
|
{
|
|
switch (format)
|
|
{
|
|
case HB_BUFFER_SERIALIZE_FORMAT_TEXT: return serialize_formats[0];
|
|
case HB_BUFFER_SERIALIZE_FORMAT_JSON: return serialize_formats[1];
|
|
default:
|
|
case HB_BUFFER_SERIALIZE_FORMAT_INVALID: return NULL;
|
|
}
|
|
}
|
|
|
|
static unsigned int
|
|
_hb_buffer_serialize_glyphs_json (hb_buffer_t *buffer,
|
|
unsigned int start,
|
|
unsigned int end,
|
|
char *buf,
|
|
unsigned int buf_size,
|
|
unsigned int *buf_consumed,
|
|
hb_font_t *font,
|
|
hb_buffer_serialize_flags_t flags)
|
|
{
|
|
hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, NULL);
|
|
hb_glyph_position_t *pos = (flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS) ?
|
|
NULL : hb_buffer_get_glyph_positions (buffer, NULL);
|
|
|
|
*buf_consumed = 0;
|
|
for (unsigned int i = start; i < end; i++)
|
|
{
|
|
char b[1024];
|
|
char *p = b;
|
|
|
|
/* In the following code, we know b is large enough that no overflow can happen. */
|
|
|
|
#define APPEND(s) HB_STMT_START { strcpy (p, s); p += strlen (s); } HB_STMT_END
|
|
|
|
if (i)
|
|
*p++ = ',';
|
|
|
|
*p++ = '{';
|
|
|
|
APPEND ("\"g\":");
|
|
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES))
|
|
{
|
|
char g[128];
|
|
hb_font_glyph_to_string (font, info[i].codepoint, g, sizeof (g));
|
|
*p++ = '"';
|
|
for (char *q = g; *q; q++) {
|
|
if (*q == '"')
|
|
*p++ = '\\';
|
|
*p++ = *q;
|
|
}
|
|
*p++ = '"';
|
|
}
|
|
else
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));
|
|
|
|
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"cl\":%u", info[i].cluster));
|
|
}
|
|
|
|
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS))
|
|
{
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"dx\":%d,\"dy\":%d",
|
|
pos[i].x_offset, pos[i].y_offset));
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"ax\":%d,\"ay\":%d",
|
|
pos[i].x_advance, pos[i].y_advance));
|
|
}
|
|
|
|
if (flags & HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS)
|
|
{
|
|
if (info[i].mask &HB_GLYPH_FLAG_DEFINED)
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"fl\":%u", info[i].mask &HB_GLYPH_FLAG_DEFINED));
|
|
}
|
|
|
|
if (flags & HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS)
|
|
{
|
|
hb_glyph_extents_t extents;
|
|
hb_font_get_glyph_extents(font, info[i].codepoint, &extents);
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"xb\":%d,\"yb\":%d",
|
|
extents.x_bearing, extents.y_bearing));
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"w\":%d,\"h\":%d",
|
|
extents.width, extents.height));
|
|
}
|
|
|
|
*p++ = '}';
|
|
|
|
unsigned int l = p - b;
|
|
if (buf_size > l)
|
|
{
|
|
memcpy (buf, b, l);
|
|
buf += l;
|
|
buf_size -= l;
|
|
*buf_consumed += l;
|
|
*buf = '\0';
|
|
} else
|
|
return i - start;
|
|
}
|
|
|
|
return end - start;
|
|
}
|
|
|
|
static unsigned int
|
|
_hb_buffer_serialize_glyphs_text (hb_buffer_t *buffer,
|
|
unsigned int start,
|
|
unsigned int end,
|
|
char *buf,
|
|
unsigned int buf_size,
|
|
unsigned int *buf_consumed,
|
|
hb_font_t *font,
|
|
hb_buffer_serialize_flags_t flags)
|
|
{
|
|
hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, NULL);
|
|
hb_glyph_position_t *pos = (flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS) ?
|
|
NULL : hb_buffer_get_glyph_positions (buffer, NULL);
|
|
|
|
*buf_consumed = 0;
|
|
for (unsigned int i = start; i < end; i++)
|
|
{
|
|
char b[1024];
|
|
char *p = b;
|
|
|
|
/* In the following code, we know b is large enough that no overflow can happen. */
|
|
|
|
if (i)
|
|
*p++ = '|';
|
|
|
|
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES))
|
|
{
|
|
hb_font_glyph_to_string (font, info[i].codepoint, p, 128);
|
|
p += strlen (p);
|
|
}
|
|
else
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));
|
|
|
|
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "=%u", info[i].cluster));
|
|
}
|
|
|
|
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS))
|
|
{
|
|
if (pos[i].x_offset || pos[i].y_offset)
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "@%d,%d", pos[i].x_offset, pos[i].y_offset));
|
|
|
|
*p++ = '+';
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%d", pos[i].x_advance));
|
|
if (pos[i].y_advance)
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",%d", pos[i].y_advance));
|
|
}
|
|
|
|
if (flags & HB_BUFFER_SERIALIZE_FLAG_GLYPH_FLAGS)
|
|
{
|
|
if (info[i].mask &HB_GLYPH_FLAG_DEFINED)
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "#%X", info[i].mask &HB_GLYPH_FLAG_DEFINED));
|
|
}
|
|
|
|
if (flags & HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS)
|
|
{
|
|
hb_glyph_extents_t extents;
|
|
hb_font_get_glyph_extents(font, info[i].codepoint, &extents);
|
|
p += MAX (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "<%d,%d,%d,%d>", extents.x_bearing, extents.y_bearing, extents.width, extents.height));
|
|
}
|
|
|
|
unsigned int l = p - b;
|
|
if (buf_size > l)
|
|
{
|
|
memcpy (buf, b, l);
|
|
buf += l;
|
|
buf_size -= l;
|
|
*buf_consumed += l;
|
|
*buf = '\0';
|
|
} else
|
|
return i - start;
|
|
}
|
|
|
|
return end - start;
|
|
}
|
|
|
|
/**
|
|
* hb_buffer_serialize_glyphs:
|
|
* @buffer: an #hb_buffer_t buffer.
|
|
* @start: the first item in @buffer to serialize.
|
|
* @end: the last item in @buffer to serialize.
|
|
* @buf: (out) (array length=buf_size) (element-type uint8_t): output string to
|
|
* write serialized buffer into.
|
|
* @buf_size: the size of @buf.
|
|
* @buf_consumed: (out) (allow-none): if not %NULL, will be set to the number of byes written into @buf.
|
|
* @font: (allow-none): the #hb_font_t used to shape this buffer, needed to
|
|
* read glyph names and extents. If %NULL, and empty font will be used.
|
|
* @format: the #hb_buffer_serialize_format_t to use for formatting the output.
|
|
* @flags: the #hb_buffer_serialize_flags_t that control what glyph properties
|
|
* to serialize.
|
|
*
|
|
* Serializes @buffer into a textual representation of its glyph content,
|
|
* useful for showing the contents of the buffer, for example during debugging.
|
|
* There are currently two supported serialization formats:
|
|
*
|
|
* ## text
|
|
* A human-readable, plain text format.
|
|
* The serialized glyphs will look something like:
|
|
*
|
|
* ```
|
|
* [uni0651=0@518,0+0|uni0628=0+1897]
|
|
* ```
|
|
* - The serialized glyphs are delimited with `[` and `]`.
|
|
* - Glyphs are separated with `|`
|
|
* - Each glyph starts with glyph name, or glyph index if
|
|
* #HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES flag is set. Then,
|
|
* - If #HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set, `=` then #hb_glyph_info_t.cluster.
|
|
* - If #HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS is not set, the #hb_glyph_position_t in the format:
|
|
* - If both #hb_glyph_position_t.x_offset and #hb_glyph_position_t.y_offset are not 0, `@x_offset,y_offset`. Then,
|
|
* - `+x_advance`, then `,y_advance` if #hb_glyph_position_t.y_advance is not 0. Then,
|
|
* - If #HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS is set, the
|
|
* #hb_glyph_extents_t in the format
|
|
* `<x_bearing,y_bearing,width,height>`
|
|
*
|
|
* ## json
|
|
* TODO.
|
|
*
|
|
* Return value:
|
|
* The number of serialized items.
|
|
*
|
|
* Since: 0.9.7
|
|
**/
|
|
unsigned int
|
|
hb_buffer_serialize_glyphs (hb_buffer_t *buffer,
|
|
unsigned int start,
|
|
unsigned int end,
|
|
char *buf,
|
|
unsigned int buf_size,
|
|
unsigned int *buf_consumed,
|
|
hb_font_t *font,
|
|
hb_buffer_serialize_format_t format,
|
|
hb_buffer_serialize_flags_t flags)
|
|
{
|
|
assert (start <= end && end <= buffer->len);
|
|
|
|
unsigned int sconsumed;
|
|
if (!buf_consumed)
|
|
buf_consumed = &sconsumed;
|
|
*buf_consumed = 0;
|
|
if (buf_size)
|
|
*buf = '\0';
|
|
|
|
assert ((!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID) ||
|
|
buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS);
|
|
|
|
if (!buffer->have_positions)
|
|
flags |= HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS;
|
|
|
|
if (unlikely (start == end))
|
|
return 0;
|
|
|
|
if (!font)
|
|
font = hb_font_get_empty ();
|
|
|
|
switch (format)
|
|
{
|
|
case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
|
|
return _hb_buffer_serialize_glyphs_text (buffer, start, end,
|
|
buf, buf_size, buf_consumed,
|
|
font, flags);
|
|
|
|
case HB_BUFFER_SERIALIZE_FORMAT_JSON:
|
|
return _hb_buffer_serialize_glyphs_json (buffer, start, end,
|
|
buf, buf_size, buf_consumed,
|
|
font, flags);
|
|
|
|
default:
|
|
case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
|
|
return 0;
|
|
|
|
}
|
|
}
|
|
|
|
|
|
static hb_bool_t
|
|
parse_uint (const char *pp, const char *end, uint32_t *pv)
|
|
{
|
|
char buf[32];
|
|
unsigned int len = MIN (ARRAY_LENGTH (buf) - 1, (unsigned int) (end - pp));
|
|
strncpy (buf, pp, len);
|
|
buf[len] = '\0';
|
|
|
|
char *p = buf;
|
|
char *pend = p;
|
|
uint32_t v;
|
|
|
|
errno = 0;
|
|
v = strtol (p, &pend, 10);
|
|
if (errno || p == pend || pend - p != end - pp)
|
|
return false;
|
|
|
|
*pv = v;
|
|
return true;
|
|
}
|
|
|
|
static hb_bool_t
|
|
parse_int (const char *pp, const char *end, int32_t *pv)
|
|
{
|
|
char buf[32];
|
|
unsigned int len = MIN (ARRAY_LENGTH (buf) - 1, (unsigned int) (end - pp));
|
|
strncpy (buf, pp, len);
|
|
buf[len] = '\0';
|
|
|
|
char *p = buf;
|
|
char *pend = p;
|
|
int32_t v;
|
|
|
|
errno = 0;
|
|
v = strtol (p, &pend, 10);
|
|
if (errno || p == pend || pend - p != end - pp)
|
|
return false;
|
|
|
|
*pv = v;
|
|
return true;
|
|
}
|
|
|
|
#include "hb-buffer-deserialize-json.hh"
|
|
#include "hb-buffer-deserialize-text.hh"
|
|
|
|
/**
|
|
* hb_buffer_deserialize_glyphs:
|
|
* @buffer: an #hb_buffer_t buffer.
|
|
* @buf: (array length=buf_len):
|
|
* @buf_len:
|
|
* @end_ptr: (out):
|
|
* @font:
|
|
* @format:
|
|
*
|
|
*
|
|
*
|
|
* Return value:
|
|
*
|
|
* Since: 0.9.7
|
|
**/
|
|
hb_bool_t
|
|
hb_buffer_deserialize_glyphs (hb_buffer_t *buffer,
|
|
const char *buf,
|
|
int buf_len, /* -1 means nul-terminated */
|
|
const char **end_ptr, /* May be NULL */
|
|
hb_font_t *font, /* May be NULL */
|
|
hb_buffer_serialize_format_t format)
|
|
{
|
|
const char *end;
|
|
if (!end_ptr)
|
|
end_ptr = &end;
|
|
*end_ptr = buf;
|
|
|
|
assert ((!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID) ||
|
|
buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS);
|
|
|
|
if (buf_len == -1)
|
|
buf_len = strlen (buf);
|
|
|
|
if (!buf_len)
|
|
{
|
|
*end_ptr = buf;
|
|
return false;
|
|
}
|
|
|
|
hb_buffer_set_content_type (buffer, HB_BUFFER_CONTENT_TYPE_GLYPHS);
|
|
|
|
if (!font)
|
|
font = hb_font_get_empty ();
|
|
|
|
switch (format)
|
|
{
|
|
case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
|
|
return _hb_buffer_deserialize_glyphs_text (buffer,
|
|
buf, buf_len, end_ptr,
|
|
font);
|
|
|
|
case HB_BUFFER_SERIALIZE_FORMAT_JSON:
|
|
return _hb_buffer_deserialize_glyphs_json (buffer,
|
|
buf, buf_len, end_ptr,
|
|
font);
|
|
|
|
default:
|
|
case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
|
|
return false;
|
|
|
|
}
|
|
}
|