/*
* Copyright © 1998-2004 David Turner and Werner Lemberg
* Copyright © 2004,2007,2009,2010 Red Hat, Inc.
- * Copyright © 2011 Google, Inc.
+ * Copyright © 2011,2012 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
*/
#include "hb-buffer-private.hh"
+#include "hb-utf-private.hh"
-#include <string.h>
+/**
+ * SECTION: hb-buffer
+ * @title: Buffers
+ * @short_description: Input and output buffers
+ * @include: hb.h
+ *
+ * Buffers serve dual role in HarfBuzz; they hold the input characters that are
+ * passed hb_shape(), and after shaping they hold the output glyphs.
+ **/
+
+/**
+ * hb_segment_properties_equal:
+ * @a: first #hb_segment_properties_t to compare.
+ * @b: second #hb_segment_properties_t to compare.
+ *
+ * Checks the equality of two #hb_segment_properties_t's.
+ *
+ * Return value:
+ * %true if all properties of @a equal those of @b, false otherwise.
+ *
+ * Since: 0.9.7
+ **/
+hb_bool_t
+hb_segment_properties_equal (const hb_segment_properties_t *a,
+ const hb_segment_properties_t *b)
+{
+ return a->direction == b->direction &&
+ a->script == b->script &&
+ a->language == b->language &&
+ a->reserved1 == b->reserved1 &&
+ a->reserved2 == b->reserved2;
+
+}
+
+/**
+ * hb_segment_properties_hash:
+ * @p: #hb_segment_properties_t to hash.
+ *
+ * Creates a hash representing @p.
+ *
+ * Return value:
+ * A hash of @p.
+ *
+ * Since: 0.9.7
+ **/
+unsigned int
+hb_segment_properties_hash (const hb_segment_properties_t *p)
+{
+ return (unsigned int) p->direction ^
+ (unsigned int) p->script ^
+ (intptr_t) (p->language);
+}
-#ifndef HB_DEBUG_BUFFER
-#define HB_DEBUG_BUFFER (HB_DEBUG+0)
-#endif
/* Here is how the buffer works internally:
*
bool
hb_buffer_t::enlarge (unsigned int size)
{
- if (unlikely (in_error))
+ if (unlikely (!successful))
return false;
+ if (unlikely (size > max_len))
+ {
+ successful = false;
+ return false;
+ }
unsigned int new_allocated = allocated;
- hb_glyph_position_t *new_pos = NULL;
- hb_glyph_info_t *new_info = NULL;
+ hb_glyph_position_t *new_pos = nullptr;
+ hb_glyph_info_t *new_info = nullptr;
bool separate_out = out_info != info;
if (unlikely (_hb_unsigned_int_mul_overflows (size, sizeof (info[0]))))
goto done;
- while (size > new_allocated)
+ while (size >= new_allocated)
new_allocated += (new_allocated >> 1) + 32;
- ASSERT_STATIC (sizeof (info[0]) == sizeof (pos[0]));
+ static_assert ((sizeof (info[0]) == sizeof (pos[0])), "");
if (unlikely (_hb_unsigned_int_mul_overflows (new_allocated, sizeof (info[0]))))
goto done;
done:
if (unlikely (!new_pos || !new_info))
- in_error = true;
+ successful = false;
if (likely (new_pos))
pos = new_pos;
info = new_info;
out_info = separate_out ? (hb_glyph_info_t *) pos : info;
- if (likely (!in_error))
+ if (likely (successful))
allocated = new_allocated;
- return likely (!in_error);
+ return likely (successful);
}
bool
return true;
}
-void *
+bool
+hb_buffer_t::shift_forward (unsigned int count)
+{
+ assert (have_output);
+ if (unlikely (!ensure (len + count))) return false;
+
+ memmove (info + idx + count, info + idx, (len - idx) * sizeof (info[0]));
+ if (idx + count > len)
+ {
+ /* Under memory failure we might expose this area. At least
+ * clean it up. Oh well... */
+ memset (info + len, 0, (idx + count - len) * sizeof (info[0]));
+ }
+ len += count;
+ idx += count;
+
+ return true;
+}
+
+hb_buffer_t::scratch_buffer_t *
hb_buffer_t::get_scratch_buffer (unsigned int *size)
{
have_output = false;
out_len = 0;
out_info = info;
- *size = allocated * sizeof (pos[0]);
- return pos;
+ assert ((uintptr_t) pos % sizeof (scratch_buffer_t) == 0);
+ *size = allocated * sizeof (pos[0]) / sizeof (scratch_buffer_t);
+ return (scratch_buffer_t *) (void *) pos;
}
hb_unicode_funcs_destroy (unicode);
unicode = hb_unicode_funcs_get_default ();
+ flags = HB_BUFFER_FLAG_DEFAULT;
+ replacement = HB_BUFFER_REPLACEMENT_CODEPOINT_DEFAULT;
- hb_segment_properties_t default_props = _HB_BUFFER_PROPS_DEFAULT;
+ clear ();
+}
+
+void
+hb_buffer_t::clear (void)
+{
+ if (unlikely (hb_object_is_inert (this)))
+ return;
+
+ hb_segment_properties_t default_props = HB_SEGMENT_PROPERTIES_DEFAULT;
props = default_props;
+ scratch_flags = HB_BUFFER_SCRATCH_FLAG_DEFAULT;
- in_error = false;
+ content_type = HB_BUFFER_CONTENT_TYPE_INVALID;
+ successful = true;
have_output = false;
have_positions = false;
out_info = info;
serial = 0;
- memset (allocated_var_bytes, 0, sizeof allocated_var_bytes);
- memset (allocated_var_owner, 0, sizeof allocated_var_owner);
+
+ memset (context, 0, sizeof context);
+ memset (context_len, 0, sizeof context_len);
+
+ deallocate_var_all ();
}
void
hb_buffer_t::add (hb_codepoint_t codepoint,
- hb_mask_t mask,
unsigned int cluster)
{
hb_glyph_info_t *glyph;
memset (glyph, 0, sizeof (*glyph));
glyph->codepoint = codepoint;
- glyph->mask = mask;
+ glyph->mask = 0;
glyph->cluster = cluster;
len++;
}
void
+hb_buffer_t::add_info (const hb_glyph_info_t &glyph_info)
+{
+ if (unlikely (!ensure (len + 1))) return;
+
+ info[len] = glyph_info;
+
+ len++;
+}
+
+
+void
+hb_buffer_t::remove_output (void)
+{
+ if (unlikely (hb_object_is_inert (this)))
+ return;
+
+ have_output = false;
+ have_positions = false;
+
+ out_len = 0;
+ out_info = info;
+}
+
+void
hb_buffer_t::clear_output (void)
{
if (unlikely (hb_object_is_inert (this)))
void
hb_buffer_t::swap_buffers (void)
{
- if (unlikely (in_error)) return;
+ if (unlikely (!successful)) return;
assert (have_output);
have_output = false;
}
void
+hb_buffer_t::output_info (const hb_glyph_info_t &glyph_info)
+{
+ if (unlikely (!make_room_for (0, 1))) return;
+
+ out_info[out_len] = glyph_info;
+
+ out_len++;
+}
+
+void
hb_buffer_t::copy_glyph (void)
{
if (unlikely (!make_room_for (0, 1))) return;
out_len++;
}
+bool
+hb_buffer_t::move_to (unsigned int i)
+{
+ if (!have_output)
+ {
+ assert (i <= len);
+ idx = i;
+ return true;
+ }
+ if (unlikely (!successful))
+ return false;
+
+ assert (i <= out_len + (len - idx));
+
+ if (out_len < i)
+ {
+ unsigned int count = i - out_len;
+ if (unlikely (!make_room_for (count, count))) return false;
+
+ memmove (out_info + out_len, info + idx, count * sizeof (out_info[0]));
+ idx += count;
+ out_len += count;
+ }
+ else if (out_len > i)
+ {
+ /* Tricky part: rewinding... */
+ unsigned int count = out_len - i;
+
+ /* This will blow in our face if memory allocation fails later
+ * in this same lookup... */
+ if (unlikely (idx < count && !shift_forward (count + 32))) return false;
+
+ assert (idx >= count);
+
+ idx -= count;
+ out_len -= count;
+ memmove (info + idx, out_info + out_len, count * sizeof (out_info[0]));
+ }
+
+ return true;
+}
+
void
hb_buffer_t::replace_glyph (hb_codepoint_t glyph_index)
{
out_len++;
}
-void
-hb_buffer_t::next_glyph (void)
-{
- if (have_output)
- {
- if (unlikely (out_info != info || out_len != idx)) {
- if (unlikely (!make_room_for (1, 1))) return;
- out_info[out_len] = info[idx];
- }
- out_len++;
- }
-
- idx++;
-}
-
void
hb_buffer_t::set_masks (hb_mask_t value,
{
unsigned int i, j;
- if (start == end - 1)
+ if (end - start < 2)
return;
for (i = start, j = end - 1; i < j; i++, j--) {
info[j] = t;
}
- if (pos) {
+ if (have_positions) {
for (i = start, j = end - 1; i < j; i++, j--) {
hb_glyph_position_t t;
}
void
-hb_buffer_t::merge_clusters (unsigned int start,
- unsigned int end)
+hb_buffer_t::merge_clusters_impl (unsigned int start,
+ unsigned int end)
{
- if (unlikely (end - start < 2))
+ if (cluster_level == HB_BUFFER_CLUSTER_LEVEL_CHARACTERS)
+ {
+ unsafe_to_break (start, end);
return;
+ }
unsigned int cluster = info[start].cluster;
for (unsigned int i = start + 1; i < end; i++)
- cluster = MIN (cluster, info[i].cluster);
+ cluster = MIN<unsigned int> (cluster, info[i].cluster);
/* Extend end */
while (end < len && info[end - 1].cluster == info[end].cluster)
/* If we hit the start of buffer, continue in out-buffer. */
if (idx == start)
- for (unsigned i = out_len; i && out_info[i - 1].cluster == info[start].cluster; i--)
- out_info[i - 1].cluster = cluster;
+ for (unsigned int i = out_len; i && out_info[i - 1].cluster == info[start].cluster; i--)
+ set_cluster (out_info[i - 1], cluster);
for (unsigned int i = start; i < end; i++)
- info[i].cluster = cluster;
+ set_cluster (info[i], cluster);
}
void
hb_buffer_t::merge_out_clusters (unsigned int start,
unsigned int end)
{
+ if (cluster_level == HB_BUFFER_CLUSTER_LEVEL_CHARACTERS)
+ return;
+
if (unlikely (end - start < 2))
return;
unsigned int cluster = out_info[start].cluster;
for (unsigned int i = start + 1; i < end; i++)
- cluster = MIN (cluster, out_info[i].cluster);
+ cluster = MIN<unsigned int> (cluster, out_info[i].cluster);
/* Extend start */
while (start && out_info[start - 1].cluster == out_info[start].cluster)
/* If we hit the end of out-buffer, continue in buffer. */
if (end == out_len)
- for (unsigned i = idx; i < len && info[i].cluster == out_info[end - 1].cluster; i++)
- info[i].cluster = cluster;
+ for (unsigned int i = idx; i < len && info[i].cluster == out_info[end - 1].cluster; i++)
+ set_cluster (info[i], cluster);
for (unsigned int i = start; i < end; i++)
- out_info[i].cluster = cluster;
+ set_cluster (out_info[i], cluster);
+}
+void
+hb_buffer_t::delete_glyph ()
+{
+ /* The logic here is duplicated in hb_ot_hide_default_ignorables(). */
+
+ unsigned int cluster = info[idx].cluster;
+ if (idx + 1 < len && cluster == info[idx + 1].cluster)
+ {
+ /* Cluster survives; do nothing. */
+ goto done;
+ }
+
+ if (out_len)
+ {
+ /* Merge cluster backward. */
+ if (cluster < out_info[out_len - 1].cluster)
+ {
+ unsigned int mask = info[idx].mask;
+ unsigned int old_cluster = out_info[out_len - 1].cluster;
+ for (unsigned i = out_len; i && out_info[i - 1].cluster == old_cluster; i--)
+ set_cluster (out_info[i - 1], cluster, mask);
+ }
+ goto done;
+ }
+
+ if (idx + 1 < len)
+ {
+ /* Merge cluster forward. */
+ merge_clusters (idx, idx + 2);
+ goto done;
+ }
+
+done:
+ skip_glyph ();
}
void
-hb_buffer_t::guess_properties (void)
+hb_buffer_t::unsafe_to_break_impl (unsigned int start, unsigned int end)
{
+ unsigned int cluster = (unsigned int) -1;
+ cluster = _unsafe_to_break_find_min_cluster (info, start, end, cluster);
+ _unsafe_to_break_set_mask (info, start, end, cluster);
+}
+void
+hb_buffer_t::unsafe_to_break_from_outbuffer (unsigned int start, unsigned int end)
+{
+ if (!have_output)
+ {
+ unsafe_to_break_impl (start, end);
+ return;
+ }
+
+ assert (start <= out_len);
+ assert (idx <= end);
+
+ unsigned int cluster = (unsigned int) -1;
+ cluster = _unsafe_to_break_find_min_cluster (out_info, start, out_len, cluster);
+ cluster = _unsafe_to_break_find_min_cluster (info, idx, end, cluster);
+ _unsafe_to_break_set_mask (out_info, start, out_len, cluster);
+ _unsafe_to_break_set_mask (info, idx, end, cluster);
+}
+
+void
+hb_buffer_t::guess_segment_properties (void)
+{
+ assert (content_type == HB_BUFFER_CONTENT_TYPE_UNICODE ||
+ (!len && content_type == HB_BUFFER_CONTENT_TYPE_INVALID));
+
/* If script is set to INVALID, guess from buffer contents */
if (props.script == HB_SCRIPT_INVALID) {
for (unsigned int i = 0; i < len; i++) {
/* If direction is set to INVALID, guess from script */
if (props.direction == HB_DIRECTION_INVALID) {
props.direction = hb_script_get_horizontal_direction (props.script);
+ if (props.direction == HB_DIRECTION_INVALID)
+ props.direction = HB_DIRECTION_LTR;
}
/* If language is not set, use default language from locale */
}
-static inline void
-dump_var_allocation (const hb_buffer_t *buffer)
-{
- char buf[80];
- for (unsigned int i = 0; i < 8; i++)
- buf[i] = '0' + buffer->allocated_var_bytes[7 - i];
- buf[8] = '\0';
- DEBUG_MSG (BUFFER, buffer,
- "Current var allocation: %s",
- buf);
-}
-
-void hb_buffer_t::allocate_var (unsigned int byte_i, unsigned int count, const char *owner)
-{
- assert (byte_i < 8 && byte_i + count <= 8);
-
- if (DEBUG (BUFFER))
- dump_var_allocation (this);
- DEBUG_MSG (BUFFER, this,
- "Allocating var bytes %d..%d for %s",
- byte_i, byte_i + count - 1, owner);
-
- for (unsigned int i = byte_i; i < byte_i + count; i++) {
- assert (!allocated_var_bytes[i]);
- allocated_var_bytes[i]++;
- allocated_var_owner[i] = owner;
- }
-}
-
-void hb_buffer_t::deallocate_var (unsigned int byte_i, unsigned int count, const char *owner)
-{
- if (DEBUG (BUFFER))
- dump_var_allocation (this);
-
- DEBUG_MSG (BUFFER, this,
- "Deallocating var bytes %d..%d for %s",
- byte_i, byte_i + count - 1, owner);
-
- assert (byte_i < 8 && byte_i + count <= 8);
- for (unsigned int i = byte_i; i < byte_i + count; i++) {
- assert (allocated_var_bytes[i]);
- assert (0 == strcmp (allocated_var_owner[i], owner));
- allocated_var_bytes[i]--;
- }
-}
-
-void hb_buffer_t::deallocate_var_all (void)
-{
- memset (allocated_var_bytes, 0, sizeof (allocated_var_bytes));
- memset (allocated_var_owner, 0, sizeof (allocated_var_owner));
-}
-
/* Public API */
+/**
+ * hb_buffer_create: (Xconstructor)
+ *
+ * Creates a new #hb_buffer_t with all properties to defaults.
+ *
+ * Return value: (transfer full):
+ * A newly allocated #hb_buffer_t with a reference count of 1. The initial
+ * reference count should be released with hb_buffer_destroy() when you are done
+ * using the #hb_buffer_t. This function never returns %NULL. If memory cannot
+ * be allocated, a special #hb_buffer_t object will be returned on which
+ * hb_buffer_allocation_successful() returns %false.
+ *
+ * Since: 0.9.2
+ **/
hb_buffer_t *
-hb_buffer_create ()
+hb_buffer_create (void)
{
hb_buffer_t *buffer;
if (!(buffer = hb_object_create<hb_buffer_t> ()))
return hb_buffer_get_empty ();
+ buffer->max_len = HB_BUFFER_MAX_LEN_DEFAULT;
+ buffer->max_ops = HB_BUFFER_MAX_OPS_DEFAULT;
+
buffer->reset ();
return buffer;
}
+/**
+ * hb_buffer_get_empty:
+ *
+ *
+ *
+ * Return value: (transfer full):
+ *
+ * Since: 0.9.2
+ **/
hb_buffer_t *
hb_buffer_get_empty (void)
{
HB_OBJECT_HEADER_STATIC,
const_cast<hb_unicode_funcs_t *> (&_hb_unicode_funcs_nil),
- _HB_BUFFER_PROPS_DEFAULT,
-
- true, /* in_error */
+ HB_BUFFER_FLAG_DEFAULT,
+ HB_BUFFER_CLUSTER_LEVEL_DEFAULT,
+ HB_BUFFER_REPLACEMENT_CODEPOINT_DEFAULT,
+ HB_BUFFER_SCRATCH_FLAG_DEFAULT,
+ HB_BUFFER_MAX_LEN_DEFAULT,
+ HB_BUFFER_MAX_OPS_DEFAULT,
+
+ HB_BUFFER_CONTENT_TYPE_INVALID,
+ HB_SEGMENT_PROPERTIES_DEFAULT,
+ false, /* successful */
true, /* have_output */
true /* have_positions */
+
+ /* Zero is good enough for everything else. */
};
return const_cast<hb_buffer_t *> (&_hb_buffer_nil);
}
+/**
+ * hb_buffer_reference: (skip)
+ * @buffer: an #hb_buffer_t.
+ *
+ * Increases the reference count on @buffer by one. This prevents @buffer from
+ * being destroyed until a matching call to hb_buffer_destroy() is made.
+ *
+ * Return value: (transfer full):
+ * The referenced #hb_buffer_t.
+ *
+ * Since: 0.9.2
+ **/
hb_buffer_t *
hb_buffer_reference (hb_buffer_t *buffer)
{
return hb_object_reference (buffer);
}
+/**
+ * hb_buffer_destroy: (skip)
+ * @buffer: an #hb_buffer_t.
+ *
+ * Deallocate the @buffer.
+ * Decreases the reference count on @buffer by one. If the result is zero, then
+ * @buffer and all associated resources are freed. See hb_buffer_reference().
+ *
+ * Since: 0.9.2
+ **/
void
hb_buffer_destroy (hb_buffer_t *buffer)
{
free (buffer->info);
free (buffer->pos);
+ if (buffer->message_destroy)
+ buffer->message_destroy (buffer->message_data);
free (buffer);
}
+/**
+ * hb_buffer_set_user_data: (skip)
+ * @buffer: an #hb_buffer_t.
+ * @key:
+ * @data:
+ * @destroy:
+ * @replace:
+ *
+ *
+ *
+ * Return value:
+ *
+ * Since: 0.9.2
+ **/
hb_bool_t
hb_buffer_set_user_data (hb_buffer_t *buffer,
hb_user_data_key_t *key,
return hb_object_set_user_data (buffer, key, data, destroy, replace);
}
+/**
+ * hb_buffer_get_user_data: (skip)
+ * @buffer: an #hb_buffer_t.
+ * @key:
+ *
+ *
+ *
+ * Return value:
+ *
+ * Since: 0.9.2
+ **/
void *
hb_buffer_get_user_data (hb_buffer_t *buffer,
hb_user_data_key_t *key)
}
+/**
+ * hb_buffer_set_content_type:
+ * @buffer: an #hb_buffer_t.
+ * @content_type: the type of buffer contents to set
+ *
+ * Sets the type of @buffer contents, buffers are either empty, contain
+ * characters (before shaping) or glyphs (the result of shaping).
+ *
+ * Since: 0.9.5
+ **/
+void
+hb_buffer_set_content_type (hb_buffer_t *buffer,
+ hb_buffer_content_type_t content_type)
+{
+ buffer->content_type = content_type;
+}
+
+/**
+ * hb_buffer_get_content_type:
+ * @buffer: an #hb_buffer_t.
+ *
+ * see hb_buffer_set_content_type().
+ *
+ * Return value:
+ * The type of @buffer contents.
+ *
+ * Since: 0.9.5
+ **/
+hb_buffer_content_type_t
+hb_buffer_get_content_type (hb_buffer_t *buffer)
+{
+ return buffer->content_type;
+}
+
+
+/**
+ * hb_buffer_set_unicode_funcs:
+ * @buffer: an #hb_buffer_t.
+ * @unicode_funcs:
+ *
+ *
+ *
+ * Since: 0.9.2
+ **/
void
hb_buffer_set_unicode_funcs (hb_buffer_t *buffer,
- hb_unicode_funcs_t *unicode)
+ hb_unicode_funcs_t *unicode_funcs)
{
if (unlikely (hb_object_is_inert (buffer)))
return;
- if (!unicode)
- unicode = hb_unicode_funcs_get_default ();
+ if (!unicode_funcs)
+ unicode_funcs = hb_unicode_funcs_get_default ();
- hb_unicode_funcs_reference (unicode);
+ hb_unicode_funcs_reference (unicode_funcs);
hb_unicode_funcs_destroy (buffer->unicode);
- buffer->unicode = unicode;
+ buffer->unicode = unicode_funcs;
}
+/**
+ * hb_buffer_get_unicode_funcs:
+ * @buffer: an #hb_buffer_t.
+ *
+ *
+ *
+ * Return value:
+ *
+ * Since: 0.9.2
+ **/
hb_unicode_funcs_t *
hb_buffer_get_unicode_funcs (hb_buffer_t *buffer)
{
return buffer->unicode;
}
+/**
+ * hb_buffer_set_direction:
+ * @buffer: an #hb_buffer_t.
+ * @direction: the #hb_direction_t of the @buffer
+ *
+ * Set the text flow direction of the buffer. No shaping can happen without
+ * setting @buffer direction, and it controls the visual direction for the
+ * output glyphs; for RTL direction the glyphs will be reversed. Many layout
+ * features depend on the proper setting of the direction, for example,
+ * reversing RTL text before shaping, then shaping with LTR direction is not
+ * the same as keeping the text in logical order and shaping with RTL
+ * direction.
+ *
+ * Since: 0.9.2
+ **/
void
hb_buffer_set_direction (hb_buffer_t *buffer,
hb_direction_t direction)
buffer->props.direction = direction;
}
+/**
+ * hb_buffer_get_direction:
+ * @buffer: an #hb_buffer_t.
+ *
+ * See hb_buffer_set_direction()
+ *
+ * Return value:
+ * The direction of the @buffer.
+ *
+ * Since: 0.9.2
+ **/
hb_direction_t
hb_buffer_get_direction (hb_buffer_t *buffer)
{
return buffer->props.direction;
}
+/**
+ * hb_buffer_set_script:
+ * @buffer: an #hb_buffer_t.
+ * @script: an #hb_script_t to set.
+ *
+ * Sets the script of @buffer to @script.
+ *
+ * Script is crucial for choosing the proper shaping behaviour for scripts that
+ * require it (e.g. Arabic) and the which OpenType features defined in the font
+ * to be applied.
+ *
+ * You can pass one of the predefined #hb_script_t values, or use
+ * hb_script_from_string() or hb_script_from_iso15924_tag() to get the
+ * corresponding script from an ISO 15924 script tag.
+ *
+ * Since: 0.9.2
+ **/
void
hb_buffer_set_script (hb_buffer_t *buffer,
hb_script_t script)
buffer->props.script = script;
}
+/**
+ * hb_buffer_get_script:
+ * @buffer: an #hb_buffer_t.
+ *
+ * See hb_buffer_set_script().
+ *
+ * Return value:
+ * The #hb_script_t of the @buffer.
+ *
+ * Since: 0.9.2
+ **/
hb_script_t
hb_buffer_get_script (hb_buffer_t *buffer)
{
return buffer->props.script;
}
+/**
+ * hb_buffer_set_language:
+ * @buffer: an #hb_buffer_t.
+ * @language: an hb_language_t to set.
+ *
+ * Sets the language of @buffer to @language.
+ *
+ * Languages are crucial for selecting which OpenType feature to apply to the
+ * buffer which can result in applying language-specific behaviour. Languages
+ * are orthogonal to the scripts, and though they are related, they are
+ * different concepts and should not be confused with each other.
+ *
+ * Use hb_language_from_string() to convert from ISO 639 language codes to
+ * #hb_language_t.
+ *
+ * Since: 0.9.2
+ **/
void
hb_buffer_set_language (hb_buffer_t *buffer,
hb_language_t language)
buffer->props.language = language;
}
+/**
+ * hb_buffer_get_language:
+ * @buffer: an #hb_buffer_t.
+ *
+ * See hb_buffer_set_language().
+ *
+ * Return value: (transfer none):
+ * The #hb_language_t of the buffer. Must not be freed by the caller.
+ *
+ * Since: 0.9.2
+ **/
hb_language_t
hb_buffer_get_language (hb_buffer_t *buffer)
{
return buffer->props.language;
}
+/**
+ * hb_buffer_set_segment_properties:
+ * @buffer: an #hb_buffer_t.
+ * @props: an #hb_segment_properties_t to use.
+ *
+ * Sets the segment properties of the buffer, a shortcut for calling
+ * hb_buffer_set_direction(), hb_buffer_set_script() and
+ * hb_buffer_set_language() individually.
+ *
+ * Since: 0.9.7
+ **/
+void
+hb_buffer_set_segment_properties (hb_buffer_t *buffer,
+ const hb_segment_properties_t *props)
+{
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
+
+ buffer->props = *props;
+}
+
+/**
+ * hb_buffer_get_segment_properties:
+ * @buffer: an #hb_buffer_t.
+ * @props: (out): the output #hb_segment_properties_t.
+ *
+ * Sets @props to the #hb_segment_properties_t of @buffer.
+ *
+ * Since: 0.9.7
+ **/
+void
+hb_buffer_get_segment_properties (hb_buffer_t *buffer,
+ hb_segment_properties_t *props)
+{
+ *props = buffer->props;
+}
+
+/**
+ * hb_buffer_set_flags:
+ * @buffer: an #hb_buffer_t.
+ * @flags: the buffer flags to set.
+ *
+ * Sets @buffer flags to @flags. See #hb_buffer_flags_t.
+ *
+ * Since: 0.9.7
+ **/
+void
+hb_buffer_set_flags (hb_buffer_t *buffer,
+ hb_buffer_flags_t flags)
+{
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
+
+ buffer->flags = flags;
+}
+
+/**
+ * hb_buffer_get_flags:
+ * @buffer: an #hb_buffer_t.
+ *
+ * See hb_buffer_set_flags().
+ *
+ * Return value:
+ * The @buffer flags.
+ *
+ * Since: 0.9.7
+ **/
+hb_buffer_flags_t
+hb_buffer_get_flags (hb_buffer_t *buffer)
+{
+ return buffer->flags;
+}
+
+/**
+ * hb_buffer_set_cluster_level:
+ * @buffer: an #hb_buffer_t.
+ * @cluster_level:
+ *
+ *
+ *
+ * Since: 0.9.42
+ **/
+void
+hb_buffer_set_cluster_level (hb_buffer_t *buffer,
+ hb_buffer_cluster_level_t cluster_level)
+{
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
+
+ buffer->cluster_level = cluster_level;
+}
+
+/**
+ * hb_buffer_get_cluster_level:
+ * @buffer: an #hb_buffer_t.
+ *
+ *
+ *
+ * Return value:
+ *
+ * Since: 0.9.42
+ **/
+hb_buffer_cluster_level_t
+hb_buffer_get_cluster_level (hb_buffer_t *buffer)
+{
+ return buffer->cluster_level;
+}
+
+
+/**
+ * hb_buffer_set_replacement_codepoint:
+ * @buffer: an #hb_buffer_t.
+ * @replacement: the replacement #hb_codepoint_t
+ *
+ * Sets the #hb_codepoint_t that replaces invalid entries for a given encoding
+ * when adding text to @buffer.
+ *
+ * Default is %HB_BUFFER_REPLACEMENT_CODEPOINT_DEFAULT.
+ *
+ * Since: 0.9.31
+ **/
+void
+hb_buffer_set_replacement_codepoint (hb_buffer_t *buffer,
+ hb_codepoint_t replacement)
+{
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
+
+ buffer->replacement = replacement;
+}
+
+/**
+ * hb_buffer_get_replacement_codepoint:
+ * @buffer: an #hb_buffer_t.
+ *
+ * See hb_buffer_set_replacement_codepoint().
+ *
+ * Return value:
+ * The @buffer replacement #hb_codepoint_t.
+ *
+ * Since: 0.9.31
+ **/
+hb_codepoint_t
+hb_buffer_get_replacement_codepoint (hb_buffer_t *buffer)
+{
+ return buffer->replacement;
+}
+
+
+/**
+ * hb_buffer_reset:
+ * @buffer: an #hb_buffer_t.
+ *
+ * Resets the buffer to its initial status, as if it was just newly created
+ * with hb_buffer_create().
+ *
+ * Since: 0.9.2
+ **/
void
hb_buffer_reset (hb_buffer_t *buffer)
{
buffer->reset ();
}
+/**
+ * hb_buffer_clear_contents:
+ * @buffer: an #hb_buffer_t.
+ *
+ * Similar to hb_buffer_reset(), but does not clear the Unicode functions and
+ * the replacement code point.
+ *
+ * Since: 0.9.11
+ **/
+void
+hb_buffer_clear_contents (hb_buffer_t *buffer)
+{
+ buffer->clear ();
+}
+
+/**
+ * hb_buffer_pre_allocate:
+ * @buffer: an #hb_buffer_t.
+ * @size: number of items to pre allocate.
+ *
+ * Pre allocates memory for @buffer to fit at least @size number of items.
+ *
+ * Return value:
+ * %true if @buffer memory allocation succeeded, %false otherwise.
+ *
+ * Since: 0.9.2
+ **/
hb_bool_t
hb_buffer_pre_allocate (hb_buffer_t *buffer, unsigned int size)
{
return buffer->ensure (size);
}
+/**
+ * hb_buffer_allocation_successful:
+ * @buffer: an #hb_buffer_t.
+ *
+ * Check if allocating memory for the buffer succeeded.
+ *
+ * Return value:
+ * %true if @buffer memory allocation succeeded, %false otherwise.
+ *
+ * Since: 0.9.2
+ **/
hb_bool_t
hb_buffer_allocation_successful (hb_buffer_t *buffer)
{
- return !buffer->in_error;
+ return buffer->successful;
}
+/**
+ * hb_buffer_add:
+ * @buffer: an #hb_buffer_t.
+ * @codepoint: a Unicode code point.
+ * @cluster: the cluster value of @codepoint.
+ *
+ * Appends a character with the Unicode value of @codepoint to @buffer, and
+ * gives it the initial cluster value of @cluster. Clusters can be any thing
+ * the client wants, they are usually used to refer to the index of the
+ * character in the input text stream and are output in
+ * #hb_glyph_info_t.cluster field.
+ *
+ * This function does not check the validity of @codepoint, it is up to the
+ * caller to ensure it is a valid Unicode code point.
+ *
+ * Since: 0.9.7
+ **/
void
hb_buffer_add (hb_buffer_t *buffer,
hb_codepoint_t codepoint,
- hb_mask_t mask,
unsigned int cluster)
{
- buffer->add (codepoint, mask, cluster);
+ buffer->add (codepoint, cluster);
+ buffer->clear_context (1);
}
+/**
+ * hb_buffer_set_length:
+ * @buffer: an #hb_buffer_t.
+ * @length: the new length of @buffer.
+ *
+ * Similar to hb_buffer_pre_allocate(), but clears any new items added at the
+ * end.
+ *
+ * Return value:
+ * %true if @buffer memory allocation succeeded, %false otherwise.
+ *
+ * Since: 0.9.2
+ **/
hb_bool_t
hb_buffer_set_length (hb_buffer_t *buffer,
unsigned int length)
}
buffer->len = length;
+
+ if (!length)
+ {
+ buffer->content_type = HB_BUFFER_CONTENT_TYPE_INVALID;
+ buffer->clear_context (0);
+ }
+ buffer->clear_context (1);
+
return true;
}
+/**
+ * hb_buffer_get_length:
+ * @buffer: an #hb_buffer_t.
+ *
+ * Returns the number of items in the buffer.
+ *
+ * Return value:
+ * The @buffer length.
+ * The value valid as long as buffer has not been modified.
+ *
+ * Since: 0.9.2
+ **/
unsigned int
hb_buffer_get_length (hb_buffer_t *buffer)
{
return buffer->len;
}
-/* Return value valid as long as buffer not modified */
+/**
+ * hb_buffer_get_glyph_infos:
+ * @buffer: an #hb_buffer_t.
+ * @length: (out): output array length.
+ *
+ * Returns @buffer glyph information array. Returned pointer
+ * is valid as long as @buffer contents are not modified.
+ *
+ * Return value: (transfer none) (array length=length):
+ * The @buffer glyph information array.
+ * The value valid as long as buffer has not been modified.
+ *
+ * Since: 0.9.2
+ **/
hb_glyph_info_t *
hb_buffer_get_glyph_infos (hb_buffer_t *buffer,
unsigned int *length)
return (hb_glyph_info_t *) buffer->info;
}
-/* Return value valid as long as buffer not modified */
+/**
+ * hb_buffer_get_glyph_positions:
+ * @buffer: an #hb_buffer_t.
+ * @length: (out): output length.
+ *
+ * Returns @buffer glyph position array. Returned pointer
+ * is valid as long as @buffer contents are not modified.
+ *
+ * Return value: (transfer none) (array length=length):
+ * The @buffer glyph position array.
+ * The value valid as long as buffer has not been modified.
+ *
+ * Since: 0.9.2
+ **/
hb_glyph_position_t *
hb_buffer_get_glyph_positions (hb_buffer_t *buffer,
unsigned int *length)
return (hb_glyph_position_t *) buffer->pos;
}
+/**
+ * hb_glyph_info_get_glyph_flags:
+ * @info: a #hb_glyph_info_t.
+ *
+ * Returns glyph flags encoded within a #hb_glyph_info_t.
+ *
+ * Return value:
+ * The #hb_glyph_flags_t encoded within @info.
+ *
+ * Since: 1.5.0
+ **/
+hb_glyph_flags_t
+(hb_glyph_info_get_glyph_flags) (const hb_glyph_info_t *info)
+{
+ return hb_glyph_info_get_glyph_flags (info);
+}
+
+/**
+ * hb_buffer_reverse:
+ * @buffer: an #hb_buffer_t.
+ *
+ * Reverses buffer contents.
+ *
+ * Since: 0.9.2
+ **/
void
hb_buffer_reverse (hb_buffer_t *buffer)
{
buffer->reverse ();
}
+/**
+ * hb_buffer_reverse_range:
+ * @buffer: an #hb_buffer_t.
+ * @start: start index.
+ * @end: end index.
+ *
+ * Reverses buffer contents between start to end.
+ *
+ * Since: 0.9.41
+ **/
+void
+hb_buffer_reverse_range (hb_buffer_t *buffer,
+ unsigned int start, unsigned int end)
+{
+ buffer->reverse_range (start, end);
+}
+
+/**
+ * hb_buffer_reverse_clusters:
+ * @buffer: an #hb_buffer_t.
+ *
+ * Reverses buffer clusters. That is, the buffer contents are
+ * reversed, then each cluster (consecutive items having the
+ * same cluster number) are reversed again.
+ *
+ * Since: 0.9.2
+ **/
void
hb_buffer_reverse_clusters (hb_buffer_t *buffer)
{
buffer->reverse_clusters ();
}
+/**
+ * hb_buffer_guess_segment_properties:
+ * @buffer: an #hb_buffer_t.
+ *
+ * Sets unset buffer segment properties based on buffer Unicode
+ * contents. If buffer is not empty, it must have content type
+ * %HB_BUFFER_CONTENT_TYPE_UNICODE.
+ *
+ * If buffer script is not set (ie. is %HB_SCRIPT_INVALID), it
+ * will be set to the Unicode script of the first character in
+ * the buffer that has a script other than %HB_SCRIPT_COMMON,
+ * %HB_SCRIPT_INHERITED, and %HB_SCRIPT_UNKNOWN.
+ *
+ * Next, if buffer direction is not set (ie. is %HB_DIRECTION_INVALID),
+ * it will be set to the natural horizontal direction of the
+ * buffer script as returned by hb_script_get_horizontal_direction().
+ * If hb_script_get_horizontal_direction() returns %HB_DIRECTION_INVALID,
+ * then %HB_DIRECTION_LTR is used.
+ *
+ * Finally, if buffer language is not set (ie. is %HB_LANGUAGE_INVALID),
+ * it will be set to the process's default language as returned by
+ * hb_language_get_default(). This may change in the future by
+ * taking buffer script into consideration when choosing a language.
+ *
+ * Since: 0.9.7
+ **/
void
-hb_buffer_guess_properties (hb_buffer_t *buffer)
-{
- buffer->guess_properties ();
-}
-
-#define ADD_UTF(T) \
- HB_STMT_START { \
- if (text_length == -1) { \
- text_length = 0; \
- const T *p = (const T *) text; \
- while (*p) { \
- text_length++; \
- p++; \
- } \
- } \
- if (item_length == -1) \
- item_length = text_length - item_offset; \
- buffer->ensure (buffer->len + item_length * sizeof (T) / 4); \
- const T *next = (const T *) text + item_offset; \
- const T *end = next + item_length; \
- while (next < end) { \
- hb_codepoint_t u; \
- const T *old_next = next; \
- next = UTF_NEXT (next, end, u); \
- hb_buffer_add (buffer, u, 1, old_next - (const T *) text); \
- } \
- } HB_STMT_END
-
-
-#define UTF8_COMPUTE(Char, Mask, Len) \
- if (Char < 128) { Len = 1; Mask = 0x7f; } \
- else if ((Char & 0xe0) == 0xc0) { Len = 2; Mask = 0x1f; } \
- else if ((Char & 0xf0) == 0xe0) { Len = 3; Mask = 0x0f; } \
- else if ((Char & 0xf8) == 0xf0) { Len = 4; Mask = 0x07; } \
- else Len = 0;
-
-static inline const uint8_t *
-hb_utf8_next (const uint8_t *text,
- const uint8_t *end,
- hb_codepoint_t *unicode)
-{
- uint8_t c = *text;
- unsigned int mask, len;
-
- /* TODO check for overlong sequences? */
-
- UTF8_COMPUTE (c, mask, len);
- if (unlikely (!len || (unsigned int) (end - text) < len)) {
- *unicode = -1;
- return text + 1;
- } else {
- hb_codepoint_t result;
- unsigned int i;
- result = c & mask;
- for (i = 1; i < len; i++)
- {
- if (unlikely ((text[i] & 0xc0) != 0x80))
- {
- *unicode = -1;
- return text + 1;
- }
- result <<= 6;
- result |= (text[i] & 0x3f);
- }
- *unicode = result;
- return text + len;
+hb_buffer_guess_segment_properties (hb_buffer_t *buffer)
+{
+ buffer->guess_segment_properties ();
+}
+
+template <typename utf_t>
+static inline void
+hb_buffer_add_utf (hb_buffer_t *buffer,
+ const typename utf_t::codepoint_t *text,
+ int text_length,
+ unsigned int item_offset,
+ int item_length)
+{
+ typedef typename utf_t::codepoint_t T;
+ const hb_codepoint_t replacement = buffer->replacement;
+
+ assert (buffer->content_type == HB_BUFFER_CONTENT_TYPE_UNICODE ||
+ (!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID));
+
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
+
+ if (text_length == -1)
+ text_length = utf_t::strlen (text);
+
+ if (item_length == -1)
+ item_length = text_length - item_offset;
+
+ buffer->ensure (buffer->len + item_length * sizeof (T) / 4);
+
+ /* If buffer is empty and pre-context provided, install it.
+ * This check is written this way, to make sure people can
+ * provide pre-context in one add_utf() call, then provide
+ * text in a follow-up call. See:
+ *
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=801410#c13
+ */
+ if (!buffer->len && item_offset > 0)
+ {
+ /* Add pre-context */
+ buffer->clear_context (0);
+ const T *prev = text + item_offset;
+ const T *start = text;
+ while (start < prev && buffer->context_len[0] < buffer->CONTEXT_LENGTH)
+ {
+ hb_codepoint_t u;
+ prev = utf_t::prev (prev, start, &u, replacement);
+ buffer->context[0][buffer->context_len[0]++] = u;
+ }
+ }
+
+ const T *next = text + item_offset;
+ const T *end = next + item_length;
+ while (next < end)
+ {
+ hb_codepoint_t u;
+ const T *old_next = next;
+ next = utf_t::next (next, end, &u, replacement);
+ buffer->add (u, old_next - (const T *) text);
}
+
+ /* Add post-context */
+ buffer->clear_context (1);
+ end = text + text_length;
+ while (next < end && buffer->context_len[1] < buffer->CONTEXT_LENGTH)
+ {
+ hb_codepoint_t u;
+ next = utf_t::next (next, end, &u, replacement);
+ buffer->context[1][buffer->context_len[1]++] = u;
+ }
+
+ buffer->content_type = HB_BUFFER_CONTENT_TYPE_UNICODE;
}
+/**
+ * hb_buffer_add_utf8:
+ * @buffer: an #hb_buffer_t.
+ * @text: (array length=text_length) (element-type uint8_t): an array of UTF-8
+ * characters to append.
+ * @text_length: the length of the @text, or -1 if it is %NULL terminated.
+ * @item_offset: the offset of the first character to add to the @buffer.
+ * @item_length: the number of characters to add to the @buffer, or -1 for the
+ * end of @text (assuming it is %NULL terminated).
+ *
+ * See hb_buffer_add_codepoints().
+ *
+ * Replaces invalid UTF-8 characters with the @buffer replacement code point,
+ * see hb_buffer_set_replacement_codepoint().
+ *
+ * Since: 0.9.2
+ **/
void
hb_buffer_add_utf8 (hb_buffer_t *buffer,
const char *text,
unsigned int item_offset,
int item_length)
{
-#define UTF_NEXT(S, E, U) hb_utf8_next (S, E, &(U))
- ADD_UTF (uint8_t);
-#undef UTF_NEXT
-}
-
-static inline const uint16_t *
-hb_utf16_next (const uint16_t *text,
- const uint16_t *end,
- hb_codepoint_t *unicode)
-{
- uint16_t c = *text++;
-
- if (unlikely (c >= 0xd800 && c < 0xdc00)) {
- /* high surrogate */
- uint16_t l;
- if (text < end && ((l = *text), likely (l >= 0xdc00 && l < 0xe000))) {
- /* low surrogate */
- *unicode = ((hb_codepoint_t) ((c) - 0xd800) * 0x400 + (l) - 0xdc00 + 0x10000);
- text++;
- } else
- *unicode = -1;
- } else
- *unicode = c;
-
- return text;
+ hb_buffer_add_utf<hb_utf8_t> (buffer, (const uint8_t *) text, text_length, item_offset, item_length);
}
+/**
+ * hb_buffer_add_utf16:
+ * @buffer: an #hb_buffer_t.
+ * @text: (array length=text_length): an array of UTF-16 characters to append.
+ * @text_length: the length of the @text, or -1 if it is %NULL terminated.
+ * @item_offset: the offset of the first character to add to the @buffer.
+ * @item_length: the number of characters to add to the @buffer, or -1 for the
+ * end of @text (assuming it is %NULL terminated).
+ *
+ * See hb_buffer_add_codepoints().
+ *
+ * Replaces invalid UTF-16 characters with the @buffer replacement code point,
+ * see hb_buffer_set_replacement_codepoint().
+ *
+ * Since: 0.9.2
+ **/
void
hb_buffer_add_utf16 (hb_buffer_t *buffer,
const uint16_t *text,
int text_length,
unsigned int item_offset,
- int item_length)
+ int item_length)
{
-#define UTF_NEXT(S, E, U) hb_utf16_next (S, E, &(U))
- ADD_UTF (uint16_t);
-#undef UTF_NEXT
+ hb_buffer_add_utf<hb_utf16_t> (buffer, text, text_length, item_offset, item_length);
}
+/**
+ * hb_buffer_add_utf32:
+ * @buffer: an #hb_buffer_t.
+ * @text: (array length=text_length): an array of UTF-32 characters to append.
+ * @text_length: the length of the @text, or -1 if it is %NULL terminated.
+ * @item_offset: the offset of the first character to add to the @buffer.
+ * @item_length: the number of characters to add to the @buffer, or -1 for the
+ * end of @text (assuming it is %NULL terminated).
+ *
+ * See hb_buffer_add_codepoints().
+ *
+ * Replaces invalid UTF-32 characters with the @buffer replacement code point,
+ * see hb_buffer_set_replacement_codepoint().
+ *
+ * Since: 0.9.2
+ **/
void
hb_buffer_add_utf32 (hb_buffer_t *buffer,
const uint32_t *text,
unsigned int item_offset,
int item_length)
{
-#define UTF_NEXT(S, E, U) ((U) = *(S), (S)+1)
- ADD_UTF (uint32_t);
-#undef UTF_NEXT
+ hb_buffer_add_utf<hb_utf32_t<> > (buffer, text, text_length, item_offset, item_length);
+}
+
+/**
+ * hb_buffer_add_latin1:
+ * @buffer: an #hb_buffer_t.
+ * @text: (array length=text_length) (element-type uint8_t): an array of UTF-8
+ * characters to append.
+ * @text_length: the length of the @text, or -1 if it is %NULL terminated.
+ * @item_offset: the offset of the first character to add to the @buffer.
+ * @item_length: the number of characters to add to the @buffer, or -1 for the
+ * end of @text (assuming it is %NULL terminated).
+ *
+ * Similar to hb_buffer_add_codepoints(), but allows only access to first 256
+ * Unicode code points that can fit in 8-bit strings.
+ *
+ * <note>Has nothing to do with non-Unicode Latin-1 encoding.</note>
+ *
+ * Since: 0.9.39
+ **/
+void
+hb_buffer_add_latin1 (hb_buffer_t *buffer,
+ const uint8_t *text,
+ int text_length,
+ unsigned int item_offset,
+ int item_length)
+{
+ hb_buffer_add_utf<hb_latin1_t> (buffer, text, text_length, item_offset, item_length);
+}
+
+/**
+ * hb_buffer_add_codepoints:
+ * @buffer: a #hb_buffer_t to append characters to.
+ * @text: (array length=text_length): an array of Unicode code points to append.
+ * @text_length: the length of the @text, or -1 if it is %NULL terminated.
+ * @item_offset: the offset of the first code point to add to the @buffer.
+ * @item_length: the number of code points to add to the @buffer, or -1 for the
+ * end of @text (assuming it is %NULL terminated).
+ *
+ * Appends characters from @text array to @buffer. The @item_offset is the
+ * position of the first character from @text that will be appended, and
+ * @item_length is the number of character. When shaping part of a larger text
+ * (e.g. a run of text from a paragraph), instead of passing just the substring
+ * corresponding to the run, it is preferable to pass the whole
+ * paragraph and specify the run start and length as @item_offset and
+ * @item_length, respectively, to give HarfBuzz the full context to be able,
+ * for example, to do cross-run Arabic shaping or properly handle combining
+ * marks at stat of run.
+ *
+ * This function does not check the validity of @text, it is up to the caller
+ * to ensure it contains a valid Unicode code points.
+ *
+ * Since: 0.9.31
+ **/
+void
+hb_buffer_add_codepoints (hb_buffer_t *buffer,
+ const hb_codepoint_t *text,
+ int text_length,
+ unsigned int item_offset,
+ int item_length)
+{
+ hb_buffer_add_utf<hb_utf32_t<false> > (buffer, text, text_length, item_offset, item_length);
+}
+
+
+/**
+ * hb_buffer_append:
+ * @buffer: an #hb_buffer_t.
+ * @source: source #hb_buffer_t.
+ * @start: start index into source buffer to copy. Use 0 to copy from start of buffer.
+ * @end: end index into source buffer to copy. Use (unsigned int) -1 to copy to end of buffer.
+ *
+ * Append (part of) contents of another buffer to this buffer.
+ *
+ * Since: 1.5.0
+ **/
+HB_EXTERN void
+hb_buffer_append (hb_buffer_t *buffer,
+ hb_buffer_t *source,
+ unsigned int start,
+ unsigned int end)
+{
+ assert (!buffer->have_output && !source->have_output);
+ assert (buffer->have_positions == source->have_positions ||
+ !buffer->len || !source->len);
+ assert (buffer->content_type == source->content_type ||
+ !buffer->len || !source->len);
+
+ if (end > source->len)
+ end = source->len;
+ if (start > end)
+ start = end;
+ if (start == end)
+ return;
+
+ if (!buffer->len)
+ buffer->content_type = source->content_type;
+ if (!buffer->have_positions && source->have_positions)
+ buffer->clear_positions ();
+
+ if (buffer->len + (end - start) < buffer->len) /* Overflows. */
+ {
+ buffer->successful = false;
+ return;
+ }
+
+ unsigned int orig_len = buffer->len;
+ hb_buffer_set_length (buffer, buffer->len + (end - start));
+ if (unlikely (!buffer->successful))
+ return;
+
+ memcpy (buffer->info + orig_len, source->info + start, (end - start) * sizeof (buffer->info[0]));
+ if (buffer->have_positions)
+ memcpy (buffer->pos + orig_len, source->pos + start, (end - start) * sizeof (buffer->pos[0]));
}
pos[end - 1].x_advance = total_x_advance;
pos[end - 1].y_advance = total_y_advance;
- hb_bubble_sort (buffer->info + start, end - start - 1, compare_info_codepoint, buffer->pos + start);
+ hb_stable_sort (buffer->info + start, end - start - 1, compare_info_codepoint, buffer->pos + start);
} else {
/* Transfer all cluster advance to the first glyph. */
pos[start].x_advance += total_x_advance;
pos[i].x_offset -= total_x_advance;
pos[i].y_offset -= total_y_advance;
}
- hb_bubble_sort (buffer->info + start + 1, end - start - 1, compare_info_codepoint, buffer->pos + start + 1);
+ hb_stable_sort (buffer->info + start + 1, end - start - 1, compare_info_codepoint, buffer->pos + start + 1);
}
}
+/**
+ * hb_buffer_normalize_glyphs:
+ * @buffer: an #hb_buffer_t.
+ *
+ * Reorders a glyph buffer to have canonical in-cluster glyph order / position.
+ * The resulting clusters should behave identical to pre-reordering clusters.
+ *
+ * <note>This has nothing to do with Unicode normalization.</note>
+ *
+ * Since: 0.9.2
+ **/
void
hb_buffer_normalize_glyphs (hb_buffer_t *buffer)
{
assert (buffer->have_positions);
- /* XXX assert (buffer->have_glyphs); */
+ assert (buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS ||
+ (!buffer->len && buffer->content_type == HB_BUFFER_CONTENT_TYPE_INVALID));
bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
}
normalize_glyphs_cluster (buffer, start, end, backward);
}
+
+void
+hb_buffer_t::sort (unsigned int start, unsigned int end, int(*compar)(const hb_glyph_info_t *, const hb_glyph_info_t *))
+{
+ assert (!have_positions);
+ for (unsigned int i = start + 1; i < end; i++)
+ {
+ unsigned int j = i;
+ while (j > start && compar (&info[j - 1], &info[i]) > 0)
+ j--;
+ if (i == j)
+ continue;
+ /* Move item i to occupy place for item j, shift what's in between. */
+ merge_clusters (j, i + 1);
+ {
+ hb_glyph_info_t t = info[i];
+ memmove (&info[j + 1], &info[j], (i - j) * sizeof (hb_glyph_info_t));
+ info[j] = t;
+ }
+ }
+}
+
+
+/*
+ * Comparing buffers.
+ */
+
+/**
+ * hb_buffer_diff:
+ *
+ * If dottedcircle_glyph is (hb_codepoint_t) -1 then %HB_BUFFER_DIFF_FLAG_DOTTED_CIRCLE_PRESENT
+ * and %HB_BUFFER_DIFF_FLAG_NOTDEF_PRESENT are never returned. This should be used by most
+ * callers if just comparing two buffers is needed.
+ *
+ * Since: 1.5.0
+ **/
+hb_buffer_diff_flags_t
+hb_buffer_diff (hb_buffer_t *buffer,
+ hb_buffer_t *reference,
+ hb_codepoint_t dottedcircle_glyph,
+ unsigned int position_fuzz)
+{
+ if (buffer->content_type != reference->content_type && buffer->len && reference->len)
+ return HB_BUFFER_DIFF_FLAG_CONTENT_TYPE_MISMATCH;
+
+ hb_buffer_diff_flags_t result = HB_BUFFER_DIFF_FLAG_EQUAL;
+ bool contains = dottedcircle_glyph != (hb_codepoint_t) -1;
+
+ unsigned int count = reference->len;
+
+ if (buffer->len != count)
+ {
+ /*
+ * we can't compare glyph-by-glyph, but we do want to know if there
+ * are .notdef or dottedcircle glyphs present in the reference buffer
+ */
+ const hb_glyph_info_t *info = reference->info;
+ unsigned int i;
+ for (i = 0; i < count; i++)
+ {
+ if (contains && info[i].codepoint == dottedcircle_glyph)
+ result |= HB_BUFFER_DIFF_FLAG_DOTTED_CIRCLE_PRESENT;
+ if (contains && info[i].codepoint == 0)
+ result |= HB_BUFFER_DIFF_FLAG_NOTDEF_PRESENT;
+ }
+ result |= HB_BUFFER_DIFF_FLAG_LENGTH_MISMATCH;
+ return hb_buffer_diff_flags_t (result);
+ }
+
+ if (!count)
+ return hb_buffer_diff_flags_t (result);
+
+ const hb_glyph_info_t *buf_info = buffer->info;
+ const hb_glyph_info_t *ref_info = reference->info;
+ for (unsigned int i = 0; i < count; i++)
+ {
+ if (buf_info->codepoint != ref_info->codepoint)
+ result |= HB_BUFFER_DIFF_FLAG_CODEPOINT_MISMATCH;
+ if (buf_info->cluster != ref_info->cluster)
+ result |= HB_BUFFER_DIFF_FLAG_CLUSTER_MISMATCH;
+ if ((buf_info->mask & ~ref_info->mask & HB_GLYPH_FLAG_DEFINED))
+ result |= HB_BUFFER_DIFF_FLAG_GLYPH_FLAGS_MISMATCH;
+ if (contains && ref_info->codepoint == dottedcircle_glyph)
+ result |= HB_BUFFER_DIFF_FLAG_DOTTED_CIRCLE_PRESENT;
+ if (contains && ref_info->codepoint == 0)
+ result |= HB_BUFFER_DIFF_FLAG_NOTDEF_PRESENT;
+ buf_info++;
+ ref_info++;
+ }
+
+ if (buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS)
+ {
+ assert (buffer->have_positions);
+ const hb_glyph_position_t *buf_pos = buffer->pos;
+ const hb_glyph_position_t *ref_pos = reference->pos;
+ for (unsigned int i = 0; i < count; i++)
+ {
+ if ((unsigned int) abs (buf_pos->x_advance - ref_pos->x_advance) > position_fuzz ||
+ (unsigned int) abs (buf_pos->y_advance - ref_pos->y_advance) > position_fuzz ||
+ (unsigned int) abs (buf_pos->x_offset - ref_pos->x_offset) > position_fuzz ||
+ (unsigned int) abs (buf_pos->y_offset - ref_pos->y_offset) > position_fuzz)
+ {
+ result |= HB_BUFFER_DIFF_FLAG_POSITION_MISMATCH;
+ break;
+ }
+ buf_pos++;
+ ref_pos++;
+ }
+ }
+
+ return result;
+}
+
+
+/*
+ * Debugging.
+ */
+
+/**
+ * hb_buffer_set_message_func:
+ * @buffer: an #hb_buffer_t.
+ * @func: (closure user_data) (destroy destroy) (scope notified):
+ * @user_data:
+ * @destroy:
+ *
+ *
+ *
+ * Since: 1.1.3
+ **/
+void
+hb_buffer_set_message_func (hb_buffer_t *buffer,
+ hb_buffer_message_func_t func,
+ void *user_data, hb_destroy_func_t destroy)
+{
+ if (buffer->message_destroy)
+ buffer->message_destroy (buffer->message_data);
+
+ if (func) {
+ buffer->message_func = func;
+ buffer->message_data = user_data;
+ buffer->message_destroy = destroy;
+ } else {
+ buffer->message_func = nullptr;
+ buffer->message_data = nullptr;
+ buffer->message_destroy = nullptr;
+ }
+}
+
+bool
+hb_buffer_t::message_impl (hb_font_t *font, const char *fmt, va_list ap)
+{
+ char buf[100];
+ vsnprintf (buf, sizeof (buf), fmt, ap);
+ return (bool) this->message_func (this, font, buf, this->message_data);
+}
projects / platform / upstream / harfbuzz.git / blobdiff