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authorPeter Breitenlohner <peb@mppmu.mpg.de>2014-01-31 09:16:15 +0000
committerPeter Breitenlohner <peb@mppmu.mpg.de>2014-01-31 09:16:15 +0000
commit0aa2304636143cf73b6718e82646736aa7dc5f10 (patch)
tree5096a2d5f16670c8001f7ab7c35118e8ea7d6c94 /Build/source/libs/harfbuzz/harfbuzz-0.9.25/src/hb-buffer.cc
parent413cdef969440005d01da2c407b2c700db4592ff (diff)
harfbuzz 0.9.26
git-svn-id: svn://tug.org/texlive/trunk@32830 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-0.9.25/src/hb-buffer.cc')
-rw-r--r--Build/source/libs/harfbuzz/harfbuzz-0.9.25/src/hb-buffer.cc1501
1 files changed, 0 insertions, 1501 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-0.9.25/src/hb-buffer.cc b/Build/source/libs/harfbuzz/harfbuzz-0.9.25/src/hb-buffer.cc
deleted file mode 100644
index d6c6fcb8e6e..00000000000
--- a/Build/source/libs/harfbuzz/harfbuzz-0.9.25/src/hb-buffer.cc
+++ /dev/null
@@ -1,1501 +0,0 @@
-/*
- * Copyright © 1998-2004 David Turner and Werner Lemberg
- * Copyright © 2004,2007,2009,2010 Red Hat, Inc.
- * 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.
- *
- * Red Hat Author(s): Owen Taylor, Behdad Esfahbod
- * Google Author(s): Behdad Esfahbod
- */
-
-#include "hb-buffer-private.hh"
-#include "hb-utf-private.hh"
-
-
-#ifndef HB_DEBUG_BUFFER
-#define HB_DEBUG_BUFFER (HB_DEBUG+0)
-#endif
-
-
-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;
-
-}
-
-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);
-}
-
-
-
-/* Here is how the buffer works internally:
- *
- * There are two info pointers: info and out_info. They always have
- * the same allocated size, but different lengths.
- *
- * As an optimization, both info and out_info may point to the
- * same piece of memory, which is owned by info. This remains the
- * case as long as out_len doesn't exceed i at any time.
- * In that case, swap_buffers() is no-op and the glyph operations operate
- * mostly in-place.
- *
- * As soon as out_info gets longer than info, out_info is moved over
- * to an alternate buffer (which we reuse the pos buffer for!), and its
- * current contents (out_len entries) are copied to the new place.
- * This should all remain transparent to the user. swap_buffers() then
- * switches info and out_info.
- */
-
-
-
-/* Internal API */
-
-bool
-hb_buffer_t::enlarge (unsigned int size)
-{
- if (unlikely (in_error))
- return false;
-
- unsigned int new_allocated = allocated;
- hb_glyph_position_t *new_pos = NULL;
- hb_glyph_info_t *new_info = NULL;
- bool separate_out = out_info != info;
-
- if (unlikely (_hb_unsigned_int_mul_overflows (size, sizeof (info[0]))))
- goto done;
-
- while (size >= new_allocated)
- new_allocated += (new_allocated >> 1) + 32;
-
- ASSERT_STATIC (sizeof (info[0]) == sizeof (pos[0]));
- if (unlikely (_hb_unsigned_int_mul_overflows (new_allocated, sizeof (info[0]))))
- goto done;
-
- new_pos = (hb_glyph_position_t *) realloc (pos, new_allocated * sizeof (pos[0]));
- new_info = (hb_glyph_info_t *) realloc (info, new_allocated * sizeof (info[0]));
-
-done:
- if (unlikely (!new_pos || !new_info))
- in_error = true;
-
- if (likely (new_pos))
- pos = new_pos;
-
- if (likely (new_info))
- info = new_info;
-
- out_info = separate_out ? (hb_glyph_info_t *) pos : info;
- if (likely (!in_error))
- allocated = new_allocated;
-
- return likely (!in_error);
-}
-
-bool
-hb_buffer_t::make_room_for (unsigned int num_in,
- unsigned int num_out)
-{
- if (unlikely (!ensure (out_len + num_out))) return false;
-
- if (out_info == info &&
- out_len + num_out > idx + num_in)
- {
- assert (have_output);
-
- out_info = (hb_glyph_info_t *) pos;
- memcpy (out_info, info, out_len * sizeof (out_info[0]));
- }
-
- return true;
-}
-
-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]));
- len += count;
- idx += count;
-
- return true;
-}
-
-hb_buffer_t::scratch_buffer_t *
-hb_buffer_t::get_scratch_buffer (unsigned int *size)
-{
- have_output = false;
- have_positions = false;
-
- out_len = 0;
- out_info = info;
-
- assert ((uintptr_t) pos % sizeof (scratch_buffer_t) == 0);
- *size = allocated * sizeof (pos[0]) / sizeof (scratch_buffer_t);
- return (scratch_buffer_t *) (void *) pos;
-}
-
-
-
-/* HarfBuzz-Internal API */
-
-void
-hb_buffer_t::reset (void)
-{
- if (unlikely (hb_object_is_inert (this)))
- return;
-
- hb_unicode_funcs_destroy (unicode);
- unicode = hb_unicode_funcs_get_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;
- flags = HB_BUFFER_FLAG_DEFAULT;
-
- content_type = HB_BUFFER_CONTENT_TYPE_INVALID;
- in_error = false;
- have_output = false;
- have_positions = false;
-
- idx = 0;
- len = 0;
- out_len = 0;
- 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);
-}
-
-void
-hb_buffer_t::add (hb_codepoint_t codepoint,
- unsigned int cluster)
-{
- hb_glyph_info_t *glyph;
-
- if (unlikely (!ensure (len + 1))) return;
-
- glyph = &info[len];
-
- memset (glyph, 0, sizeof (*glyph));
- glyph->codepoint = codepoint;
- glyph->mask = 1;
- 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)))
- return;
-
- have_output = true;
- have_positions = false;
-
- out_len = 0;
- out_info = info;
-}
-
-void
-hb_buffer_t::clear_positions (void)
-{
- if (unlikely (hb_object_is_inert (this)))
- return;
-
- have_output = false;
- have_positions = true;
-
- out_len = 0;
- out_info = info;
-
- memset (pos, 0, sizeof (pos[0]) * len);
-}
-
-void
-hb_buffer_t::swap_buffers (void)
-{
- if (unlikely (in_error)) return;
-
- assert (have_output);
- have_output = false;
-
- if (out_info != info)
- {
- hb_glyph_info_t *tmp_string;
- tmp_string = info;
- info = out_info;
- out_info = tmp_string;
- pos = (hb_glyph_position_t *) out_info;
- }
-
- unsigned int tmp;
- tmp = len;
- len = out_len;
- out_len = tmp;
-
- idx = 0;
-}
-
-
-void
-hb_buffer_t::replace_glyphs (unsigned int num_in,
- unsigned int num_out,
- const uint32_t *glyph_data)
-{
- if (unlikely (!make_room_for (num_in, num_out))) return;
-
- merge_clusters (idx, idx + num_in);
-
- hb_glyph_info_t orig_info = info[idx];
- hb_glyph_info_t *pinfo = &out_info[out_len];
- for (unsigned int i = 0; i < num_out; i++)
- {
- *pinfo = orig_info;
- pinfo->codepoint = glyph_data[i];
- pinfo++;
- }
-
- idx += num_in;
- out_len += num_out;
-}
-
-void
-hb_buffer_t::output_glyph (hb_codepoint_t glyph_index)
-{
- if (unlikely (!make_room_for (0, 1))) return;
-
- out_info[out_len] = info[idx];
- out_info[out_len].codepoint = glyph_index;
-
- out_len++;
-}
-
-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_info[out_len] = info[idx];
-
- out_len++;
-}
-
-bool
-hb_buffer_t::move_to (unsigned int i)
-{
- if (!have_output)
- {
- assert (i <= len);
- idx = i;
- return true;
- }
-
- 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;
-
- 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)
-{
- if (unlikely (out_info != info || out_len != idx)) {
- if (unlikely (!make_room_for (1, 1))) return;
- out_info[out_len] = info[idx];
- }
- out_info[out_len].codepoint = glyph_index;
-
- idx++;
- out_len++;
-}
-
-
-void
-hb_buffer_t::set_masks (hb_mask_t value,
- hb_mask_t mask,
- unsigned int cluster_start,
- unsigned int cluster_end)
-{
- hb_mask_t not_mask = ~mask;
- value &= mask;
-
- if (!mask)
- return;
-
- if (cluster_start == 0 && cluster_end == (unsigned int)-1) {
- unsigned int count = len;
- for (unsigned int i = 0; i < count; i++)
- info[i].mask = (info[i].mask & not_mask) | value;
- return;
- }
-
- unsigned int count = len;
- for (unsigned int i = 0; i < count; i++)
- if (cluster_start <= info[i].cluster && info[i].cluster < cluster_end)
- info[i].mask = (info[i].mask & not_mask) | value;
-}
-
-void
-hb_buffer_t::reverse_range (unsigned int start,
- unsigned int end)
-{
- unsigned int i, j;
-
- if (start == end - 1)
- return;
-
- for (i = start, j = end - 1; i < j; i++, j--) {
- hb_glyph_info_t t;
-
- t = info[i];
- info[i] = info[j];
- info[j] = t;
- }
-
- if (pos) {
- for (i = start, j = end - 1; i < j; i++, j--) {
- hb_glyph_position_t t;
-
- t = pos[i];
- pos[i] = pos[j];
- pos[j] = t;
- }
- }
-}
-
-void
-hb_buffer_t::reverse (void)
-{
- if (unlikely (!len))
- return;
-
- reverse_range (0, len);
-}
-
-void
-hb_buffer_t::reverse_clusters (void)
-{
- unsigned int i, start, count, last_cluster;
-
- if (unlikely (!len))
- return;
-
- reverse ();
-
- count = len;
- start = 0;
- last_cluster = info[0].cluster;
- for (i = 1; i < count; i++) {
- if (last_cluster != info[i].cluster) {
- reverse_range (start, i);
- start = i;
- last_cluster = info[i].cluster;
- }
- }
- reverse_range (start, i);
-}
-
-void
-hb_buffer_t::merge_clusters (unsigned int start,
- unsigned int end)
-{
- if (unlikely (end - start < 2))
- return;
-
- unsigned int cluster = info[start].cluster;
-
- for (unsigned int i = start + 1; i < end; i++)
- cluster = MIN (cluster, info[i].cluster);
-
- /* Extend end */
- while (end < len && info[end - 1].cluster == info[end].cluster)
- end++;
-
- /* Extend start */
- while (idx < start && info[start - 1].cluster == info[start].cluster)
- start--;
-
- /* 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 = start; i < end; i++)
- info[i].cluster = cluster;
-}
-void
-hb_buffer_t::merge_out_clusters (unsigned int start,
- unsigned int end)
-{
- 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);
-
- /* Extend start */
- while (start && out_info[start - 1].cluster == out_info[start].cluster)
- start--;
-
- /* Extend end */
- while (end < out_len && out_info[end - 1].cluster == out_info[end].cluster)
- end++;
-
- /* 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 = start; i < end; i++)
- out_info[i].cluster = 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++) {
- hb_script_t script = unicode->script (info[i].codepoint);
- if (likely (script != HB_SCRIPT_COMMON &&
- script != HB_SCRIPT_INHERITED &&
- script != HB_SCRIPT_UNKNOWN)) {
- props.script = script;
- break;
- }
- }
- }
-
- /* 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 language is not set, use default language from locale */
- if (props.language == HB_LANGUAGE_INVALID) {
- /* TODO get_default_for_script? using $LANGUAGE */
- props.language = hb_language_get_default ();
- }
-}
-
-
-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_ENABLED (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_ENABLED (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::assert_var (unsigned int byte_i, unsigned int count, const char *owner)
-{
- if (DEBUG_ENABLED (BUFFER))
- dump_var_allocation (this);
-
- DEBUG_MSG (BUFFER, this,
- "Asserting 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));
- }
-}
-
-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)
- *
- *
- *
- * Return value: (transfer full)
- *
- * Since: 1.0
- **/
-hb_buffer_t *
-hb_buffer_create (void)
-{
- hb_buffer_t *buffer;
-
- if (!(buffer = hb_object_create<hb_buffer_t> ()))
- return hb_buffer_get_empty ();
-
- buffer->reset ();
-
- return buffer;
-}
-
-/**
- * hb_buffer_get_empty:
- *
- *
- *
- * Return value: (transfer full):
- *
- * Since: 1.0
- **/
-hb_buffer_t *
-hb_buffer_get_empty (void)
-{
- static const hb_buffer_t _hb_buffer_nil = {
- HB_OBJECT_HEADER_STATIC,
-
- const_cast<hb_unicode_funcs_t *> (&_hb_unicode_funcs_nil),
- HB_SEGMENT_PROPERTIES_DEFAULT,
- HB_BUFFER_FLAG_DEFAULT,
-
- HB_BUFFER_CONTENT_TYPE_INVALID,
- true, /* in_error */
- 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: a buffer.
- *
- *
- *
- * Return value: (transfer full):
- *
- * Since: 1.0
- **/
-hb_buffer_t *
-hb_buffer_reference (hb_buffer_t *buffer)
-{
- return hb_object_reference (buffer);
-}
-
-/**
- * hb_buffer_destroy: (skip)
- * @buffer: a buffer.
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_destroy (hb_buffer_t *buffer)
-{
- if (!hb_object_destroy (buffer)) return;
-
- hb_unicode_funcs_destroy (buffer->unicode);
-
- free (buffer->info);
- free (buffer->pos);
-
- free (buffer);
-}
-
-/**
- * hb_buffer_set_user_data: (skip)
- * @buffer: a buffer.
- * @key:
- * @data:
- * @destroy:
- * @replace:
- *
- *
- *
- * Return value:
- *
- * Since: 1.0
- **/
-hb_bool_t
-hb_buffer_set_user_data (hb_buffer_t *buffer,
- hb_user_data_key_t *key,
- void * data,
- hb_destroy_func_t destroy,
- hb_bool_t replace)
-{
- return hb_object_set_user_data (buffer, key, data, destroy, replace);
-}
-
-/**
- * hb_buffer_get_user_data: (skip)
- * @buffer: a buffer.
- * @key:
- *
- *
- *
- * Return value:
- *
- * Since: 1.0
- **/
-void *
-hb_buffer_get_user_data (hb_buffer_t *buffer,
- hb_user_data_key_t *key)
-{
- return hb_object_get_user_data (buffer, key);
-}
-
-
-/**
- * hb_buffer_set_content_type:
- * @buffer: a buffer.
- * @content_type:
- *
- *
- *
- * Since: 1.0
- **/
-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: a buffer.
- *
- *
- *
- * Return value:
- *
- * Since: 1.0
- **/
-hb_buffer_content_type_t
-hb_buffer_get_content_type (hb_buffer_t *buffer)
-{
- return buffer->content_type;
-}
-
-
-/**
- * hb_buffer_set_unicode_funcs:
- * @buffer: a buffer.
- * @unicode_funcs:
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_set_unicode_funcs (hb_buffer_t *buffer,
- hb_unicode_funcs_t *unicode_funcs)
-{
- if (unlikely (hb_object_is_inert (buffer)))
- return;
-
- if (!unicode_funcs)
- unicode_funcs = hb_unicode_funcs_get_default ();
-
-
- hb_unicode_funcs_reference (unicode_funcs);
- hb_unicode_funcs_destroy (buffer->unicode);
- buffer->unicode = unicode_funcs;
-}
-
-/**
- * hb_buffer_get_unicode_funcs:
- * @buffer: a buffer.
- *
- *
- *
- * Return value:
- *
- * Since: 1.0
- **/
-hb_unicode_funcs_t *
-hb_buffer_get_unicode_funcs (hb_buffer_t *buffer)
-{
- return buffer->unicode;
-}
-
-/**
- * hb_buffer_set_direction:
- * @buffer: a buffer.
- * @direction:
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_set_direction (hb_buffer_t *buffer,
- hb_direction_t direction)
-
-{
- if (unlikely (hb_object_is_inert (buffer)))
- return;
-
- buffer->props.direction = direction;
-}
-
-/**
- * hb_buffer_get_direction:
- * @buffer: a buffer.
- *
- *
- *
- * Return value:
- *
- * Since: 1.0
- **/
-hb_direction_t
-hb_buffer_get_direction (hb_buffer_t *buffer)
-{
- return buffer->props.direction;
-}
-
-/**
- * hb_buffer_set_script:
- * @buffer: a buffer.
- * @script:
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_set_script (hb_buffer_t *buffer,
- hb_script_t script)
-{
- if (unlikely (hb_object_is_inert (buffer)))
- return;
-
- buffer->props.script = script;
-}
-
-/**
- * hb_buffer_get_script:
- * @buffer: a buffer.
- *
- *
- *
- * Return value:
- *
- * Since: 1.0
- **/
-hb_script_t
-hb_buffer_get_script (hb_buffer_t *buffer)
-{
- return buffer->props.script;
-}
-
-/**
- * hb_buffer_set_language:
- * @buffer: a buffer.
- * @language:
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_set_language (hb_buffer_t *buffer,
- hb_language_t language)
-{
- if (unlikely (hb_object_is_inert (buffer)))
- return;
-
- buffer->props.language = language;
-}
-
-/**
- * hb_buffer_get_language:
- * @buffer: a buffer.
- *
- *
- *
- * Return value:
- *
- * Since: 1.0
- **/
-hb_language_t
-hb_buffer_get_language (hb_buffer_t *buffer)
-{
- return buffer->props.language;
-}
-
-/**
- * hb_buffer_set_segment_properties:
- * @buffer: a buffer.
- * @props:
- *
- *
- *
- * Since: 1.0
- **/
-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: a buffer.
- * @props:
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_get_segment_properties (hb_buffer_t *buffer,
- hb_segment_properties_t *props)
-{
- *props = buffer->props;
-}
-
-
-/**
- * hb_buffer_set_flags:
- * @buffer: a buffer.
- * @flags:
- *
- *
- *
- * Since: 1.0
- **/
-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: a buffer.
- *
- *
- *
- * Return value:
- *
- * Since: 1.0
- **/
-hb_buffer_flags_t
-hb_buffer_get_flags (hb_buffer_t *buffer)
-{
- return buffer->flags;
-}
-
-
-/**
- * hb_buffer_reset:
- * @buffer: a buffer.
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_reset (hb_buffer_t *buffer)
-{
- buffer->reset ();
-}
-
-/**
- * hb_buffer_clear_contents:
- * @buffer: a buffer.
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_clear_contents (hb_buffer_t *buffer)
-{
- buffer->clear ();
-}
-
-/**
- * hb_buffer_pre_allocate:
- * @buffer: a buffer.
- * @size:
- *
- *
- *
- * Return value:
- *
- * Since: 1.0
- **/
-hb_bool_t
-hb_buffer_pre_allocate (hb_buffer_t *buffer, unsigned int size)
-{
- return buffer->ensure (size);
-}
-
-/**
- * hb_buffer_allocation_successful:
- * @buffer: a buffer.
- *
- *
- *
- * Return value:
- *
- * Since: 1.0
- **/
-hb_bool_t
-hb_buffer_allocation_successful (hb_buffer_t *buffer)
-{
- return !buffer->in_error;
-}
-
-/**
- * hb_buffer_add:
- * @buffer: a buffer.
- * @codepoint:
- * @cluster:
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_add (hb_buffer_t *buffer,
- hb_codepoint_t codepoint,
- unsigned int cluster)
-{
- buffer->add (codepoint, cluster);
- buffer->clear_context (1);
-}
-
-/**
- * hb_buffer_set_length:
- * @buffer: a buffer.
- * @length:
- *
- *
- *
- * Return value:
- *
- * Since: 1.0
- **/
-hb_bool_t
-hb_buffer_set_length (hb_buffer_t *buffer,
- unsigned int length)
-{
- if (unlikely (hb_object_is_inert (buffer)))
- return length == 0;
-
- if (!buffer->ensure (length))
- return false;
-
- /* Wipe the new space */
- if (length > buffer->len) {
- memset (buffer->info + buffer->len, 0, sizeof (buffer->info[0]) * (length - buffer->len));
- if (buffer->have_positions)
- memset (buffer->pos + buffer->len, 0, sizeof (buffer->pos[0]) * (length - buffer->len));
- }
-
- 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: a buffer.
- *
- * Returns the number of items in the buffer.
- *
- * Return value: buffer length.
- *
- * Since: 1.0
- **/
-unsigned int
-hb_buffer_get_length (hb_buffer_t *buffer)
-{
- return buffer->len;
-}
-
-/**
- * hb_buffer_get_glyph_infos:
- * @buffer: a buffer.
- * @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): buffer glyph information array.
- *
- * Since: 1.0
- **/
-hb_glyph_info_t *
-hb_buffer_get_glyph_infos (hb_buffer_t *buffer,
- unsigned int *length)
-{
- if (length)
- *length = buffer->len;
-
- return (hb_glyph_info_t *) buffer->info;
-}
-
-/**
- * hb_buffer_get_glyph_positions:
- * @buffer: a buffer.
- * @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): buffer glyph position array.
- *
- * Since: 1.0
- **/
-hb_glyph_position_t *
-hb_buffer_get_glyph_positions (hb_buffer_t *buffer,
- unsigned int *length)
-{
- if (!buffer->have_positions)
- buffer->clear_positions ();
-
- if (length)
- *length = buffer->len;
-
- return (hb_glyph_position_t *) buffer->pos;
-}
-
-/**
- * hb_buffer_reverse:
- * @buffer: a buffer.
- *
- * Reverses buffer contents.
- *
- * Since: 1.0
- **/
-void
-hb_buffer_reverse (hb_buffer_t *buffer)
-{
- buffer->reverse ();
-}
-
-/**
- * hb_buffer_reverse_clusters:
- * @buffer: a buffer.
- *
- * Reverses buffer clusters. That is, the buffer contents are
- * reversed, then each cluster (consecutive items having the
- * same cluster number) are reversed again.
- *
- * Since: 1.0
- **/
-void
-hb_buffer_reverse_clusters (hb_buffer_t *buffer)
-{
- buffer->reverse_clusters ();
-}
-
-/**
- * hb_buffer_guess_segment_properties:
- * @buffer: a buffer.
- *
- * 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().
- *
- * 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: 1.0
- **/
-void
-hb_buffer_guess_segment_properties (hb_buffer_t *buffer)
-{
- buffer->guess_segment_properties ();
-}
-
-template <typename T>
-static inline void
-hb_buffer_add_utf (hb_buffer_t *buffer,
- const T *text,
- int text_length,
- unsigned int item_offset,
- int item_length)
-{
- 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 = hb_utf_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 = hb_utf_prev (prev, start, &u);
- 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 = hb_utf_next (next, end, &u);
- 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 = hb_utf_next (next, end, &u);
- buffer->context[1][buffer->context_len[1]++] = u;
- }
-
- buffer->content_type = HB_BUFFER_CONTENT_TYPE_UNICODE;
-}
-
-/**
- * hb_buffer_add_utf8:
- * @buffer: a buffer.
- * @text: (array length=text_length):
- * @text_length:
- * @item_offset:
- * @item_length:
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_add_utf8 (hb_buffer_t *buffer,
- const char *text,
- int text_length,
- unsigned int item_offset,
- int item_length)
-{
- hb_buffer_add_utf (buffer, (const uint8_t *) text, text_length, item_offset, item_length);
-}
-
-/**
- * hb_buffer_add_utf16:
- * @buffer: a buffer.
- * @text: (array length=text_length):
- * @text_length:
- * @item_offset:
- * @item_length:
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_add_utf16 (hb_buffer_t *buffer,
- const uint16_t *text,
- int text_length,
- unsigned int item_offset,
- int item_length)
-{
- hb_buffer_add_utf (buffer, text, text_length, item_offset, item_length);
-}
-
-/**
- * hb_buffer_add_utf32:
- * @buffer: a buffer.
- * @text: (array length=text_length):
- * @text_length:
- * @item_offset:
- * @item_length:
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_add_utf32 (hb_buffer_t *buffer,
- const uint32_t *text,
- int text_length,
- unsigned int item_offset,
- int item_length)
-{
- hb_buffer_add_utf (buffer, text, text_length, item_offset, item_length);
-}
-
-
-static int
-compare_info_codepoint (const hb_glyph_info_t *pa,
- const hb_glyph_info_t *pb)
-{
- return (int) pb->codepoint - (int) pa->codepoint;
-}
-
-static inline void
-normalize_glyphs_cluster (hb_buffer_t *buffer,
- unsigned int start,
- unsigned int end,
- bool backward)
-{
- hb_glyph_position_t *pos = buffer->pos;
-
- /* Total cluster advance */
- hb_position_t total_x_advance = 0, total_y_advance = 0;
- for (unsigned int i = start; i < end; i++)
- {
- total_x_advance += pos[i].x_advance;
- total_y_advance += pos[i].y_advance;
- }
-
- hb_position_t x_advance = 0, y_advance = 0;
- for (unsigned int i = start; i < end; i++)
- {
- pos[i].x_offset += x_advance;
- pos[i].y_offset += y_advance;
-
- x_advance += pos[i].x_advance;
- y_advance += pos[i].y_advance;
-
- pos[i].x_advance = 0;
- pos[i].y_advance = 0;
- }
-
- if (backward)
- {
- /* Transfer all cluster advance to the last glyph. */
- 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);
- } else {
- /* Transfer all cluster advance to the first glyph. */
- pos[start].x_advance += total_x_advance;
- pos[start].y_advance += total_y_advance;
- for (unsigned int i = start + 1; i < end; i++) {
- 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_buffer_normalize_glyphs:
- * @buffer: a buffer.
- *
- *
- *
- * Since: 1.0
- **/
-void
-hb_buffer_normalize_glyphs (hb_buffer_t *buffer)
-{
- assert (buffer->have_positions);
- assert (buffer->content_type == HB_BUFFER_CONTENT_TYPE_GLYPHS);
-
- bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction);
-
- unsigned int count = buffer->len;
- if (unlikely (!count)) return;
- hb_glyph_info_t *info = buffer->info;
-
- unsigned int start = 0;
- unsigned int end;
- for (end = start + 1; end < count; end++)
- if (info[start].cluster != info[end].cluster) {
- normalize_glyphs_cluster (buffer, start, end, backward);
- start = end;
- }
- normalize_glyphs_cluster (buffer, start, end, backward);
-}