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Code Releases Wiki Activity

HarfBuzz: Update to upstream version 2.7.4

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This commit is contained in:
bruvzg
2020-12-23 23:28:02 +02:00
parent ef4e625918
commit 86006ce476
62 changed files with 6733 additions and 3230 deletions
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519
thirdparty/harfbuzz/src/hb-buffer-serialize.cc vendored
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@@ -91,26 +91,26 @@ hb_buffer_serialize_format_to_string (hb_buffer_serialize_format_t format)
{
switch ((unsigned) format)
{
case HB_BUFFER_SERIALIZE_FORMAT_TEXT: return serialize_formats[0];
case HB_BUFFER_SERIALIZE_FORMAT_JSON: return serialize_formats[1];
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 nullptr;
case HB_BUFFER_SERIALIZE_FORMAT_INVALID: return nullptr;
}
}
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)
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, nullptr);
hb_glyph_position_t *pos = (flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS) ?
nullptr : hb_buffer_get_glyph_positions (buffer, nullptr);
nullptr : hb_buffer_get_glyph_positions (buffer, nullptr);
*buf_consumed = 0;
hb_position_t x = 0, y = 0;
@@ -125,6 +125,8 @@ _hb_buffer_serialize_glyphs_json (hb_buffer_t *buffer,
if (i)
*p++ = ',';
else
*p++ = '[';
*p++ = '{';
@@ -134,8 +136,9 @@ _hb_buffer_serialize_glyphs_json (hb_buffer_t *buffer,
char g[128];
hb_font_glyph_to_string (font, info[i].codepoint, g, sizeof (g));
*p++ = '"';
for (char *q = g; *q; q++) {
if (*q == '"')
for (char *q = g; *q; q++)
{
if (unlikely (*q == '"' || *q == '\\'))
*p++ = '\\';
*p++ = *q;
}
@@ -151,16 +154,16 @@ _hb_buffer_serialize_glyphs_json (hb_buffer_t *buffer,
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS))
{
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"dx\":%d,\"dy\":%d",
x+pos[i].x_offset, y+pos[i].y_offset));
x+pos[i].x_offset, y+pos[i].y_offset));
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES))
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"ax\":%d,\"ay\":%d",
pos[i].x_advance, pos[i].y_advance));
p += hb_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 += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"fl\":%u", info[i].mask & HB_GLYPH_FLAG_DEFINED));
p += hb_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)
@@ -168,12 +171,14 @@ _hb_buffer_serialize_glyphs_json (hb_buffer_t *buffer,
hb_glyph_extents_t extents;
hb_font_get_glyph_extents(font, info[i].codepoint, &extents);
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"xb\":%d,\"yb\":%d",
extents.x_bearing, extents.y_bearing));
extents.x_bearing, extents.y_bearing));
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"w\":%d,\"h\":%d",
extents.width, extents.height));
extents.width, extents.height));
}
*p++ = '}';
if (i == end-1)
*p++ = ']';
unsigned int l = p - b;
if (buf_size > l)
@@ -196,19 +201,72 @@ _hb_buffer_serialize_glyphs_json (hb_buffer_t *buffer,
return end - start;
}
static unsigned int
_hb_buffer_serialize_unicode_json (hb_buffer_t *buffer,
unsigned int start,
unsigned int end,
char *buf,
unsigned int buf_size,
unsigned int *buf_consumed,
hb_buffer_serialize_flags_t flags)
{
hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, nullptr);
*buf_consumed = 0;
for (unsigned int i = start; i < end; i++)
{
char b[1024];
char *p = b;
if (i)
*p++ = ',';
else
*p++ = '[';
*p++ = '{';
APPEND ("\"u\":");
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%u", info[i].codepoint));
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",\"cl\":%u", info[i].cluster));
}
*p++ = '}';
if (i == end-1)
*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)
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, nullptr);
hb_glyph_position_t *pos = (flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS) ?
nullptr : hb_buffer_get_glyph_positions (buffer, nullptr);
nullptr : hb_buffer_get_glyph_positions (buffer, nullptr);
*buf_consumed = 0;
hb_position_t x = 0, y = 0;
@@ -221,9 +279,12 @@ _hb_buffer_serialize_glyphs_text (hb_buffer_t *buffer,
if (i)
*p++ = '|';
else
*p++ = '[';
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES))
{
/* TODO Escape delimiters we use. */
hb_font_glyph_to_string (font, info[i].codepoint, p, 128);
p += strlen (p);
}
@@ -237,21 +298,21 @@ _hb_buffer_serialize_glyphs_text (hb_buffer_t *buffer,
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS))
{
if (x+pos[i].x_offset || y+pos[i].y_offset)
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "@%d,%d", x+pos[i].x_offset, y+pos[i].y_offset));
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "@%d,%d", x+pos[i].x_offset, y+pos[i].y_offset));
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES))
{
*p++ = '+';
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%d", pos[i].x_advance));
if (pos[i].y_advance)
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), ",%d", pos[i].y_advance));
*p++ = '+';
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "%d", pos[i].x_advance));
if (pos[i].y_advance)
p += hb_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 += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "#%X", info[i].mask &HB_GLYPH_FLAG_DEFINED));
p += hb_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)
@@ -261,6 +322,10 @@ _hb_buffer_serialize_glyphs_text (hb_buffer_t *buffer,
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "<%d,%d,%d,%d>", extents.x_bearing, extents.y_bearing, extents.width, extents.height));
}
if (i == end-1) {
*p++ = ']';
}
unsigned int l = p - b;
if (buf_size > l)
{
@@ -282,6 +347,51 @@ _hb_buffer_serialize_glyphs_text (hb_buffer_t *buffer,
return end - start;
}
static unsigned int
_hb_buffer_serialize_unicode_text (hb_buffer_t *buffer,
unsigned int start,
unsigned int end,
char *buf,
unsigned int buf_size,
unsigned int *buf_consumed,
hb_buffer_serialize_flags_t flags)
{
hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, nullptr);
*buf_consumed = 0;
for (unsigned int i = start; i < end; i++)
{
char b[1024];
char *p = b;
if (i)
*p++ = '|';
else
*p++ = '<';
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "U+%04X", info[i].codepoint));
if (!(flags & HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS)) {
p += hb_max (0, snprintf (p, ARRAY_LENGTH (b) - (p - b), "=%u", info[i].cluster));
}
if (i == end-1)
*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;
}
/**
* hb_buffer_serialize_glyphs:
* @buffer: an #hb_buffer_t buffer.
@@ -308,6 +418,7 @@ _hb_buffer_serialize_glyphs_text (hb_buffer_t *buffer,
* ```
* [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
@@ -316,12 +427,28 @@ _hb_buffer_serialize_glyphs_text (hb_buffer_t *buffer,
* - 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
* `&lt;x_bearing,y_bearing,width,height&gt;`
* - 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.
* A machine-readable, structured format.
* The serialized glyphs will look something like:
*
* ```
* [{"g":"uni0651","cl":0,"dx":518,"dy":0,"ax":0,"ay":0},
* {"g":"uni0628","cl":0,"dx":0,"dy":0,"ax":1897,"ay":0}]
* ```
*
* Each glyph is a JSON object, with the following properties:
* - `g`: the glyph name or glyph index if
* #HB_BUFFER_SERIALIZE_FLAG_NO_GLYPH_NAMES flag is set.
* - `cl`: #hb_glyph_info_t.cluster if
* #HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set.
* - `dx`,`dy`,`ax`,`ay`: #hb_glyph_position_t.x_offset, #hb_glyph_position_t.y_offset,
* #hb_glyph_position_t.x_advance and #hb_glyph_position_t.y_advance
* respectively, if #HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS is not set.
* - `xb`,`yb`,`w`,`h`: #hb_glyph_extents_t.x_bearing, #hb_glyph_extents_t.y_bearing,
* #hb_glyph_extents_t.width and #hb_glyph_extents_t.height respectively if
* #HB_BUFFER_SERIALIZE_FLAG_GLYPH_EXTENTS is set.
*
* Return value:
* The number of serialized items.
@@ -330,16 +457,17 @@ _hb_buffer_serialize_glyphs_text (hb_buffer_t *buffer,
**/
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)
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);
end = hb_clamp (end, start, buffer->len);
start = hb_min (start, end);
unsigned int sconsumed;
if (!buf_consumed)
@@ -348,8 +476,7 @@ hb_buffer_serialize_glyphs (hb_buffer_t *buffer,
if (buf_size)
*buf = '\0';
assert ((!buffer->len && (buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID)) ||
(buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS));
buffer->assert_glyphs ();
if (!buffer->have_positions)
flags |= HB_BUFFER_SERIALIZE_FLAG_NO_POSITIONS;
@@ -364,13 +491,13 @@ hb_buffer_serialize_glyphs (hb_buffer_t *buffer,
{
case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
return _hb_buffer_serialize_glyphs_text (buffer, start, end,
buf, buf_size, buf_consumed,
font, flags);
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);
buf, buf_size, buf_consumed,
font, flags);
default:
case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
@@ -379,6 +506,182 @@ hb_buffer_serialize_glyphs (hb_buffer_t *buffer,
}
}
/**
* hb_buffer_serialize_unicode:
* @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.
* @format: the #hb_buffer_serialize_format_t to use for formatting the output.
*
* Serializes @buffer into a textual representation of its content,
* when the buffer contains Unicode codepoints (i.e., before shaping). This is
* 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 codepoints will look something like:
*
* ```
*  <U+0651=0|U+0628=1>
* ```
*
* - Glyphs are separated with `|`
* - Unicode codepoints are expressed as zero-padded four (or more)
* digit hexadecimal numbers preceded by `U+`
* - If #HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set, the cluster
* will be indicated with a `=` then #hb_glyph_info_t.cluster.
*
* ## json
* A machine-readable, structured format.
* The serialized codepoints will be a list of objects with the following
* properties:
* - `u`: the Unicode codepoint as a decimal integer
* - `cl`: #hb_glyph_info_t.cluster if
* #HB_BUFFER_SERIALIZE_FLAG_NO_CLUSTERS is not set.
*
* For example:
*
* ```
* [{u:1617,cl:0},{u:1576,cl:1}]
* ```
*
* Return value:
* The number of serialized items.
*
* Since: 2.7.3
**/
unsigned int
hb_buffer_serialize_unicode (hb_buffer_t *buffer,
unsigned int start,
unsigned int end,
char *buf,
unsigned int buf_size,
unsigned int *buf_consumed,
hb_buffer_serialize_format_t format,
hb_buffer_serialize_flags_t flags)
{
end = hb_clamp (end, start, buffer->len);
start = hb_min (start, end);
unsigned int sconsumed;
if (!buf_consumed)
buf_consumed = &sconsumed;
*buf_consumed = 0;
if (buf_size)
*buf = '\0';
buffer->assert_unicode ();
if (unlikely (start == end))
return 0;
switch (format)
{
case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
return _hb_buffer_serialize_unicode_text (buffer, start, end,
buf, buf_size, buf_consumed, flags);
case HB_BUFFER_SERIALIZE_FORMAT_JSON:
return _hb_buffer_serialize_unicode_json (buffer, start, end,
buf, buf_size, buf_consumed, flags);
default:
case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
return 0;
}
}
static unsigned int
_hb_buffer_serialize_invalid (hb_buffer_t *buffer,
unsigned int start,
unsigned int end,
char *buf,
unsigned int buf_size,
unsigned int *buf_consumed,
hb_buffer_serialize_format_t format,
hb_buffer_serialize_flags_t flags)
{
assert (!buffer->len);
unsigned int sconsumed;
if (!buf_consumed)
buf_consumed = &sconsumed;
if (buf_size < 3)
return 0;
if (format == HB_BUFFER_SERIALIZE_FORMAT_JSON) {
*buf++ = '[';
*buf++ = ']';
*buf = '\0';
} else if (format == HB_BUFFER_SERIALIZE_FORMAT_TEXT) {
*buf++ = '!';
*buf++ = '!';
*buf = '\0';
}
*buf_consumed = 2;
return 0;
}
/**
* hb_buffer_serialize:
* @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 content, whether
* Unicode codepoints or glyph identifiers and positioning information. This is
* useful for showing the contents of the buffer, for example during debugging.
* See the documentation of hb_buffer_serialize_unicode() and
* hb_buffer_serialize_glyphs() for a description of the output format.
*
* Return value:
* The number of serialized items.
*
* Since: 2.7.3
**/
unsigned int
hb_buffer_serialize (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)
{
switch (buffer->content_type)
{
case HB_BUFFER_CONTENT_TYPE_GLYPHS:
return hb_buffer_serialize_glyphs (buffer, start, end, buf, buf_size,
buf_consumed, font, format, flags);
case HB_BUFFER_CONTENT_TYPE_UNICODE:
return hb_buffer_serialize_unicode (buffer, start, end, buf, buf_size,
buf_consumed, format, flags);
case HB_BUFFER_CONTENT_TYPE_INVALID:
default:
return _hb_buffer_serialize_invalid (buffer, start, end, buf, buf_size,
buf_consumed, format, flags);
}
}
static bool
parse_int (const char *pp, const char *end, int32_t *pv)
{
@@ -403,6 +706,18 @@ parse_uint (const char *pp, const char *end, uint32_t *pv)
return true;
}
static bool
parse_hex (const char *pp, const char *end, uint32_t *pv)
{
unsigned int v;
const char *p = pp;
if (unlikely (!hb_parse_uint (&p, end, &v, true/* whole buffer */, 16)))
return false;
*pv = v;
return true;
}
#include "hb-buffer-deserialize-json.hh"
#include "hb-buffer-deserialize-text.hh"
@@ -423,19 +738,25 @@ parse_uint (const char *pp, const char *end, uint32_t *pv)
**/
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 *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));
buffer->assert_glyphs ();
if (unlikely (hb_object_is_immutable (buffer)))
{
if (end_ptr)
*end_ptr = buf;
return false;
}
if (buf_len == -1)
buf_len = strlen (buf);
@@ -454,14 +775,82 @@ hb_buffer_deserialize_glyphs (hb_buffer_t *buffer,
switch (format)
{
case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
return _hb_buffer_deserialize_glyphs_text (buffer,
buf, buf_len, end_ptr,
font);
return _hb_buffer_deserialize_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);
return _hb_buffer_deserialize_json (buffer,
buf, buf_len, end_ptr,
font);
default:
case HB_BUFFER_SERIALIZE_FORMAT_INVALID:
return false;
}
}
/**
* hb_buffer_deserialize_unicode:
* @buffer: an #hb_buffer_t buffer.
* @buf: (array length=buf_len):
* @buf_len:
* @end_ptr: (out):
* @format:
*
*
*
* Return value:
*
* Since: 2.7.3
**/
hb_bool_t
hb_buffer_deserialize_unicode (hb_buffer_t *buffer,
const char *buf,
int buf_len, /* -1 means nul-terminated */
const char **end_ptr, /* May be NULL */
hb_buffer_serialize_format_t format)
{
const char *end;
if (!end_ptr)
end_ptr = &end;
*end_ptr = buf;
buffer->assert_unicode ();
if (unlikely (hb_object_is_immutable (buffer)))
{
if (end_ptr)
*end_ptr = buf;
return false;
}
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_UNICODE);
hb_font_t* font = hb_font_get_empty ();
switch (format)
{
case HB_BUFFER_SERIALIZE_FORMAT_TEXT:
return _hb_buffer_deserialize_text (buffer,
buf, buf_len, end_ptr,
font);
case HB_BUFFER_SERIALIZE_FORMAT_JSON:
return _hb_buffer_deserialize_json (buffer,
buf, buf_len, end_ptr,
font);
default:
case HB_BUFFER_SERIALIZE_FORMAT_INVALID: