/*
- * Copyright (C) 1998-2004 David Turner and Werner Lemberg
- * Copyright (C) 2004,2007,2009,2010 Red Hat, Inc.
+ * Copyright © 1998-2004 David Turner and Werner Lemberg
+ * Copyright © 2004,2007,2009,2010 Red Hat, Inc.
+ * Copyright © 2011 Google, Inc.
*
- * This is part of HarfBuzz, a text shaping library.
+ * 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
* 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 <string.h>
-HB_BEGIN_DECLS
-static hb_buffer_t _hb_buffer_nil = {
- HB_REFERENCE_COUNT_INVALID, /* ref_count */
+#ifndef HB_DEBUG_BUFFER
+#define HB_DEBUG_BUFFER (HB_DEBUG+0)
+#endif
- &_hb_unicode_funcs_nil /* unicode */
-};
+#define _HB_BUFFER_UNICODE_FUNCS_DEFAULT (const_cast<hb_unicode_funcs_t *> (&_hb_unicode_funcs_default))
+#define _HB_BUFFER_PROPS_DEFAULT { HB_DIRECTION_INVALID, HB_SCRIPT_INVALID, HB_LANGUAGE_INVALID }
/* Here is how the buffer works internally:
*
*
* 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 len at any time.
- * In that case, swap() is no-op and the glyph operations operate
+ * 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() then
+ * This should all remain transparent to the user. swap_buffers() then
* switches info and out_info.
*/
-static hb_bool_t
-_hb_buffer_enlarge (hb_buffer_t *buffer, unsigned int size)
+
+/* Internal API */
+
+bool
+hb_buffer_t::enlarge (unsigned int size)
{
- if (unlikely (buffer->in_error))
- return FALSE;
+ if (unlikely (in_error))
+ return false;
- unsigned int new_allocated = buffer->allocated;
- hb_internal_glyph_position_t *new_pos;
- hb_internal_glyph_info_t *new_info;
- bool separate_out;
+ 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;
- separate_out = buffer->out_info != buffer->info;
+ if (unlikely (_hb_unsigned_int_mul_overflows (size, sizeof (info[0]))))
+ goto done;
while (size > new_allocated)
- new_allocated += (new_allocated >> 1) + 8;
+ 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_internal_glyph_position_t *) realloc (buffer->pos, new_allocated * sizeof (buffer->pos[0]));
- new_info = (hb_internal_glyph_info_t *) realloc (buffer->info, new_allocated * sizeof (buffer->info[0]));
+ 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))
- buffer->in_error = TRUE;
+ in_error = true;
if (likely (new_pos))
- buffer->pos = new_pos;
+ pos = new_pos;
if (likely (new_info))
- buffer->info = new_info;
+ info = new_info;
- buffer->out_info = separate_out ? (hb_internal_glyph_info_t *) buffer->pos : buffer->info;
- if (likely (!buffer->in_error))
- buffer->allocated = new_allocated;
-
- return likely (!buffer->in_error);
-}
+ out_info = separate_out ? (hb_glyph_info_t *) pos : info;
+ if (likely (!in_error))
+ allocated = new_allocated;
-static inline hb_bool_t
-_hb_buffer_ensure (hb_buffer_t *buffer, unsigned int size)
-{
- return likely (size <= buffer->allocated) ? TRUE : _hb_buffer_enlarge (buffer, size);
+ return likely (!in_error);
}
-static inline hb_bool_t
-_hb_buffer_ensure_separate (hb_buffer_t *buffer, unsigned int size)
+bool
+hb_buffer_t::make_room_for (unsigned int num_in,
+ unsigned int num_out)
{
- if (unlikely (!_hb_buffer_ensure (buffer, size))) return FALSE;
+ if (unlikely (!ensure (out_len + num_out))) return false;
- if (buffer->out_info == buffer->info)
+ if (out_info == info &&
+ out_len + num_out > idx + num_in)
{
- assert (buffer->have_output);
+ assert (have_output);
- buffer->out_info = (hb_internal_glyph_info_t *) buffer->pos;
- memcpy (buffer->out_info, buffer->info, buffer->out_len * sizeof (buffer->out_info[0]));
+ out_info = (hb_glyph_info_t *) pos;
+ memcpy (out_info, info, out_len * sizeof (out_info[0]));
}
- return TRUE;
+ return true;
}
+void *
+hb_buffer_t::get_scratch_buffer (unsigned int *size)
+{
+ have_output = false;
+ have_positions = false;
+ out_len = 0;
+ *size = allocated * sizeof (pos[0]);
+ return pos;
+}
-/* Public API */
-hb_buffer_t *
-hb_buffer_create (unsigned int pre_alloc_size)
+/* HarfBuzz-Internal API */
+
+void
+hb_buffer_t::reset (void)
{
- hb_buffer_t *buffer;
+ if (unlikely (hb_object_is_inert (this)))
+ return;
- if (!HB_OBJECT_DO_CREATE (hb_buffer_t, buffer))
- return &_hb_buffer_nil;
+ hb_unicode_funcs_destroy (unicode);
+ unicode = _HB_BUFFER_UNICODE_FUNCS_DEFAULT;
- if (pre_alloc_size)
- _hb_buffer_ensure (buffer, pre_alloc_size);
+ hb_segment_properties_t default_props = _HB_BUFFER_PROPS_DEFAULT;
+ props = default_props;
- buffer->unicode = &_hb_unicode_funcs_nil;
+ in_error = false;
+ have_output = false;
+ have_positions = false;
- return buffer;
+ idx = 0;
+ len = 0;
+ out_len = 0;
+
+ serial = 0;
+ memset (allocated_var_bytes, 0, sizeof allocated_var_bytes);
+ memset (allocated_var_owner, 0, sizeof allocated_var_owner);
+
+ out_info = info;
}
-hb_buffer_t *
-hb_buffer_reference (hb_buffer_t *buffer)
+void
+hb_buffer_t::add (hb_codepoint_t codepoint,
+ hb_mask_t mask,
+ unsigned int cluster)
{
- HB_OBJECT_DO_REFERENCE (buffer);
+ hb_glyph_info_t *glyph;
+
+ if (unlikely (!ensure (len + 1))) return;
+
+ glyph = &info[len];
+
+ memset (glyph, 0, sizeof (*glyph));
+ glyph->codepoint = codepoint;
+ glyph->mask = mask;
+ glyph->cluster = cluster;
+
+ len++;
}
-unsigned int
-hb_buffer_get_reference_count (hb_buffer_t *buffer)
+void
+hb_buffer_t::clear_output (void)
{
- HB_OBJECT_DO_GET_REFERENCE_COUNT (buffer);
+ if (unlikely (hb_object_is_inert (this)))
+ return;
+
+ have_output = true;
+ have_positions = false;
+
+ out_len = 0;
+ out_info = info;
}
void
-hb_buffer_destroy (hb_buffer_t *buffer)
+hb_buffer_t::clear_positions (void)
{
- HB_OBJECT_DO_DESTROY (buffer);
-
- hb_unicode_funcs_destroy (buffer->unicode);
+ if (unlikely (hb_object_is_inert (this)))
+ return;
- free (buffer->info);
- free (buffer->pos);
+ have_output = false;
+ have_positions = true;
- free (buffer);
+ memset (pos, 0, sizeof (pos[0]) * len);
}
-
void
-hb_buffer_set_unicode_funcs (hb_buffer_t *buffer,
- hb_unicode_funcs_t *unicode)
+hb_buffer_t::swap_buffers (void)
{
- if (!unicode)
- unicode = &_hb_unicode_funcs_nil;
+ if (unlikely (in_error)) return;
- hb_unicode_funcs_reference (unicode);
- hb_unicode_funcs_destroy (buffer->unicode);
- buffer->unicode = unicode;
+ 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;
}
-hb_unicode_funcs_t *
-hb_buffer_get_unicode_funcs (hb_buffer_t *buffer)
+void
+hb_buffer_t::replace_glyphs_be16 (unsigned int num_in,
+ unsigned int num_out,
+ const uint16_t *glyph_data_be)
{
- return buffer->unicode;
+ if (!make_room_for (num_in, num_out)) return;
+
+ hb_glyph_info_t orig_info = info[idx];
+ for (unsigned int i = 1; i < num_in; i++)
+ {
+ hb_glyph_info_t *inf = &info[idx + i];
+ orig_info.cluster = MIN (orig_info.cluster, inf->cluster);
+ }
+
+ hb_glyph_info_t *pinfo = &out_info[out_len];
+ for (unsigned int i = 0; i < num_out; i++)
+ {
+ *pinfo = orig_info;
+ pinfo->codepoint = hb_be_uint16 (glyph_data_be[i]);
+ pinfo++;
+ }
+
+ idx += num_in;
+ out_len += num_out;
}
void
-hb_buffer_set_direction (hb_buffer_t *buffer,
- hb_direction_t direction)
-
+hb_buffer_t::replace_glyphs (unsigned int num_in,
+ unsigned int num_out,
+ const uint32_t *glyph_data)
{
- buffer->props.direction = direction;
+ if (!make_room_for (num_in, num_out)) return;
+
+ hb_glyph_info_t orig_info = info[idx];
+ for (unsigned int i = 1; i < num_in; i++)
+ {
+ hb_glyph_info_t *inf = &info[idx + i];
+ orig_info.cluster = MIN (orig_info.cluster, inf->cluster);
+ }
+
+ 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;
}
-hb_direction_t
-hb_buffer_get_direction (hb_buffer_t *buffer)
+void
+hb_buffer_t::output_glyph (hb_codepoint_t glyph_index)
{
- return buffer->props.direction;
+ if (!make_room_for (0, 1)) return;
+
+ out_info[out_len] = info[idx];
+ out_info[out_len].codepoint = glyph_index;
+
+ out_len++;
}
void
-hb_buffer_set_script (hb_buffer_t *buffer,
- hb_script_t script)
+hb_buffer_t::copy_glyph (void)
{
- buffer->props.script = script;
+ if (!make_room_for (0, 1)) return;
+
+ out_info[out_len] = info[idx];
+
+ out_len++;
}
-hb_script_t
-hb_buffer_get_script (hb_buffer_t *buffer)
+void
+hb_buffer_t::replace_glyph (hb_codepoint_t glyph_index)
{
- return buffer->props.script;
+ if (!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_set_language (hb_buffer_t *buffer,
- hb_language_t language)
+hb_buffer_t::next_glyph (void)
{
- buffer->props.language = language;
+ if (have_output)
+ {
+ if (out_info != info)
+ {
+ if (unlikely (!ensure (out_len + 1))) return;
+ out_info[out_len] = info[idx];
+ }
+ else if (out_len != idx)
+ out_info[out_len] = info[idx];
+
+ out_len++;
+ }
+
+ idx++;
}
-hb_language_t
-hb_buffer_get_language (hb_buffer_t *buffer)
+void
+hb_buffer_t::set_masks (hb_mask_t value,
+ hb_mask_t mask,
+ unsigned int cluster_start,
+ unsigned int cluster_end)
{
- return buffer->props.language;
-}
+ 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_clear (hb_buffer_t *buffer)
+hb_buffer_t::reverse_range (unsigned int start,
+ unsigned int end)
{
- buffer->have_output = FALSE;
- buffer->have_positions = FALSE;
- buffer->in_error = FALSE;
- buffer->len = 0;
- buffer->out_len = 0;
- buffer->i = 0;
- buffer->out_info = buffer->info;
- buffer->max_lig_id = 0;
+ 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;
+ }
+ }
}
-hb_bool_t
-hb_buffer_ensure (hb_buffer_t *buffer, unsigned int size)
+void
+hb_buffer_t::reverse (void)
{
- return _hb_buffer_ensure (buffer, size);
+ if (unlikely (!len))
+ return;
+
+ reverse_range (0, len);
}
void
-hb_buffer_add_glyph (hb_buffer_t *buffer,
- hb_codepoint_t codepoint,
- hb_mask_t mask,
- unsigned int cluster)
+hb_buffer_t::reverse_clusters (void)
{
- hb_internal_glyph_info_t *glyph;
+ unsigned int i, start, count, last_cluster;
- if (unlikely (!_hb_buffer_ensure (buffer, buffer->len + 1))) return;
+ if (unlikely (!len))
+ return;
- glyph = &buffer->info[buffer->len];
- glyph->codepoint = codepoint;
- glyph->mask = mask;
- glyph->cluster = cluster;
- glyph->component = 0;
- glyph->lig_id = 0;
- glyph->gproperty = HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN;
+ reverse ();
- buffer->len++;
+ 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_clear_positions (hb_buffer_t *buffer)
+hb_buffer_t::merge_clusters (unsigned int start,
+ unsigned int end)
{
- _hb_buffer_clear_output (buffer);
- buffer->have_output = FALSE;
- buffer->have_positions = TRUE;
+ unsigned int cluster = this->info[start].cluster;
- if (unlikely (!buffer->pos))
- {
- buffer->pos = (hb_internal_glyph_position_t *) calloc (buffer->allocated, sizeof (buffer->pos[0]));
- return;
+ for (unsigned int i = start + 1; i < end; i++)
+ cluster = MIN (cluster, this->info[i].cluster);
+ for (unsigned int i = start; i < end; i++)
+ this->info[i].cluster = cluster;
+}
+void
+hb_buffer_t::merge_out_clusters (unsigned int start,
+ unsigned int end)
+{
+ unsigned int cluster = this->out_info[start].cluster;
+
+ for (unsigned int i = start + 1; i < end; i++)
+ cluster = MIN (cluster, this->out_info[i].cluster);
+ for (unsigned int i = start; i < end; i++)
+ this->out_info[i].cluster = cluster;
+}
+
+void
+hb_buffer_t::guess_properties (void)
+{
+ /* 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 = hb_unicode_script (unicode, info[i].codepoint);
+ if (likely (script != HB_SCRIPT_COMMON &&
+ script != HB_SCRIPT_INHERITED &&
+ script != HB_SCRIPT_UNKNOWN)) {
+ props.script = script;
+ break;
+ }
+ }
}
- memset (buffer->pos, 0, sizeof (buffer->pos[0]) * buffer->len);
+ /* 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 ();
+ }
}
-/* HarfBuzz-Internal API */
-void
-_hb_buffer_clear_output (hb_buffer_t *buffer)
+static inline void
+dump_var_allocation (const hb_buffer_t *buffer)
{
- buffer->have_output = TRUE;
- buffer->have_positions = FALSE;
- buffer->out_len = 0;
- buffer->out_info = buffer->info;
+ 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_swap (hb_buffer_t *buffer)
+void hb_buffer_t::allocate_var (unsigned int byte_i, unsigned int count, const char *owner)
{
- unsigned int tmp;
+ 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;
+ }
+}
- assert (buffer->have_output);
+void hb_buffer_t::deallocate_var (unsigned int byte_i, unsigned int count, const char *owner)
+{
+ if (DEBUG (BUFFER))
+ dump_var_allocation (this);
- if (unlikely (buffer->in_error)) return;
+ DEBUG_MSG (BUFFER, this,
+ "Deallocating var bytes %d..%d for %s",
+ byte_i, byte_i + count - 1, owner);
- if (buffer->out_info != buffer->info)
- {
- hb_internal_glyph_info_t *tmp_string;
- tmp_string = buffer->info;
- buffer->info = buffer->out_info;
- buffer->out_info = tmp_string;
- buffer->pos = (hb_internal_glyph_position_t *) buffer->out_info;
+ 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_t *
+hb_buffer_create ()
+{
+ hb_buffer_t *buffer;
+
+ if (!(buffer = hb_object_create<hb_buffer_t> ()))
+ return hb_buffer_get_empty ();
- tmp = buffer->len;
- buffer->len = buffer->out_len;
- buffer->out_len = tmp;
+ buffer->reset ();
- buffer->i = 0;
+ return buffer;
}
-/* The following function copies `num_out' elements from `glyph_data'
- to `buffer->out_info', advancing the in array pointer in the structure
- by `num_in' elements, and the out array pointer by `num_out' elements.
- Finally, it sets the `length' field of `out' equal to
- `pos' of the `out' structure.
+hb_buffer_t *
+hb_buffer_get_empty (void)
+{
+ static const hb_buffer_t _hb_buffer_nil = {
+ HB_OBJECT_HEADER_STATIC,
- If `component' is 0xFFFF, the component value from buffer->i
- will copied `num_out' times, otherwise `component' itself will
- be used to fill the `component' fields.
+ _HB_BUFFER_UNICODE_FUNCS_DEFAULT,
+ _HB_BUFFER_PROPS_DEFAULT,
- If `lig_id' is 0xFFFF, the lig_id value from buffer->i
- will copied `num_out' times, otherwise `lig_id' itself will
- be used to fill the `lig_id' fields.
+ true, /* in_error */
+ true, /* have_output */
+ true /* have_positions */
+ };
- The mask for all replacement glyphs are taken
- from the glyph at position `buffer->i'.
+ return const_cast<hb_buffer_t *> (&_hb_buffer_nil);
+}
- The cluster value for the glyph at position buffer->i is used
- for all replacement glyphs */
+hb_buffer_t *
+hb_buffer_reference (hb_buffer_t *buffer)
+{
+ return hb_object_reference (buffer);
+}
void
-_hb_buffer_add_output_glyphs (hb_buffer_t *buffer,
- unsigned int num_in,
- unsigned int num_out,
- const hb_codepoint_t *glyph_data,
- unsigned short component,
- unsigned short lig_id)
-{
- unsigned int i;
- unsigned int mask;
- unsigned int cluster;
-
- if (buffer->out_info != buffer->info ||
- buffer->out_len + num_out > buffer->i + num_in)
- {
- if (unlikely (!_hb_buffer_ensure_separate (buffer, buffer->out_len + num_out)))
- return;
- }
+hb_buffer_destroy (hb_buffer_t *buffer)
+{
+ if (!hb_object_destroy (buffer)) return;
- mask = buffer->info[buffer->i].mask;
- cluster = buffer->info[buffer->i].cluster;
- if (component == 0xFFFF)
- component = buffer->info[buffer->i].component;
- if (lig_id == 0xFFFF)
- lig_id = buffer->info[buffer->i].lig_id;
+ hb_unicode_funcs_destroy (buffer->unicode);
- for (i = 0; i < num_out; i++)
- {
- hb_internal_glyph_info_t *info = &buffer->out_info[buffer->out_len + i];
- info->codepoint = glyph_data[i];
- info->mask = mask;
- info->cluster = cluster;
- info->component = component;
- info->lig_id = lig_id;
- info->gproperty = HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN;
- }
+ free (buffer->info);
+ free (buffer->pos);
+
+ free (buffer);
+}
+
+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);
+}
- buffer->i += num_in;
- buffer->out_len += num_out;
+void *
+hb_buffer_get_user_data (hb_buffer_t *buffer,
+ hb_user_data_key_t *key)
+{
+ return hb_object_get_user_data (buffer, key);
}
+
void
-_hb_buffer_add_output_glyphs_be16 (hb_buffer_t *buffer,
- unsigned int num_in,
- unsigned int num_out,
- const uint16_t *glyph_data_be,
- unsigned short component,
- unsigned short lig_id)
-{
- unsigned int i;
- unsigned int mask;
- unsigned int cluster;
-
- if (buffer->out_info != buffer->info ||
- buffer->out_len + num_out > buffer->i + num_in)
- {
- if (unlikely (!_hb_buffer_ensure_separate (buffer, buffer->out_len + num_out)))
- return;
- }
+hb_buffer_set_unicode_funcs (hb_buffer_t *buffer,
+ hb_unicode_funcs_t *unicode)
+{
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
- mask = buffer->info[buffer->i].mask;
- cluster = buffer->info[buffer->i].cluster;
- if (component == 0xFFFF)
- component = buffer->info[buffer->i].component;
- if (lig_id == 0xFFFF)
- lig_id = buffer->info[buffer->i].lig_id;
+ if (!unicode)
+ unicode = _HB_BUFFER_UNICODE_FUNCS_DEFAULT;
- for (i = 0; i < num_out; i++)
- {
- hb_internal_glyph_info_t *info = &buffer->out_info[buffer->out_len + i];
- info->codepoint = hb_be_uint16 (glyph_data_be[i]);
- info->mask = mask;
- info->cluster = cluster;
- info->component = component;
- info->lig_id = lig_id;
- info->gproperty = HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN;
- }
+ hb_unicode_funcs_reference (unicode);
+ hb_unicode_funcs_destroy (buffer->unicode);
+ buffer->unicode = unicode;
+}
- buffer->i += num_in;
- buffer->out_len += num_out;
+hb_unicode_funcs_t *
+hb_buffer_get_unicode_funcs (hb_buffer_t *buffer)
+{
+ return buffer->unicode;
}
void
-_hb_buffer_add_output_glyph (hb_buffer_t *buffer,
- hb_codepoint_t glyph_index,
- unsigned short component,
- unsigned short lig_id)
-{
- hb_internal_glyph_info_t *info;
+hb_buffer_set_direction (hb_buffer_t *buffer,
+ hb_direction_t direction)
- if (buffer->out_info != buffer->info)
- {
- if (unlikely (!_hb_buffer_ensure (buffer, buffer->out_len + 1))) return;
- buffer->out_info[buffer->out_len] = buffer->info[buffer->i];
- }
- else if (buffer->out_len != buffer->i)
- buffer->out_info[buffer->out_len] = buffer->info[buffer->i];
+{
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
- info = &buffer->out_info[buffer->out_len];
- info->codepoint = glyph_index;
- if (component != 0xFFFF)
- info->component = component;
- if (lig_id != 0xFFFF)
- info->lig_id = lig_id;
- info->gproperty = HB_BUFFER_GLYPH_PROPERTIES_UNKNOWN;
+ buffer->props.direction = direction;
+}
- buffer->i++;
- buffer->out_len++;
+hb_direction_t
+hb_buffer_get_direction (hb_buffer_t *buffer)
+{
+ return buffer->props.direction;
}
void
-_hb_buffer_next_glyph (hb_buffer_t *buffer)
+hb_buffer_set_script (hb_buffer_t *buffer,
+ hb_script_t script)
{
- if (buffer->have_output)
- {
- if (buffer->out_info != buffer->info)
- {
- if (unlikely (!_hb_buffer_ensure (buffer, buffer->out_len + 1))) return;
- buffer->out_info[buffer->out_len] = buffer->info[buffer->i];
- }
- else if (buffer->out_len != buffer->i)
- buffer->out_info[buffer->out_len] = buffer->info[buffer->i];
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
- buffer->out_len++;
- }
+ buffer->props.script = script;
+}
- buffer->i++;
+hb_script_t
+hb_buffer_get_script (hb_buffer_t *buffer)
+{
+ return buffer->props.script;
}
void
-_hb_buffer_reset_masks (hb_buffer_t *buffer,
- hb_mask_t mask)
+hb_buffer_set_language (hb_buffer_t *buffer,
+ hb_language_t language)
{
- unsigned int count = buffer->len;
- for (unsigned int i = 0; i < count; i++)
- buffer->info[i].mask = 1;
+ if (unlikely (hb_object_is_inert (buffer)))
+ return;
+
+ buffer->props.language = language;
}
+hb_language_t
+hb_buffer_get_language (hb_buffer_t *buffer)
+{
+ return buffer->props.language;
+}
+
+
void
-_hb_buffer_add_masks (hb_buffer_t *buffer,
- hb_mask_t value,
- hb_mask_t mask,
- unsigned int cluster_start,
- unsigned int cluster_end)
+hb_buffer_reset (hb_buffer_t *buffer)
{
- hb_mask_t not_mask = ~mask;
+ buffer->reset ();
+}
- if (cluster_start == 0 && cluster_end == (unsigned int)-1) {
- unsigned int count = buffer->len;
- for (unsigned int i = 0; i < count; i++)
- buffer->info[i].mask = (buffer->info[i].mask & not_mask) | value;
- return;
- }
+hb_bool_t
+hb_buffer_pre_allocate (hb_buffer_t *buffer, unsigned int size)
+{
+ return buffer->ensure (size);
+}
- /* XXX can't bsearch since .cluster may not be sorted. */
- /* Binary search to find the start position and go from there. */
- unsigned int min = 0, max = buffer->len;
- while (min < max)
- {
- unsigned int mid = min + ((max - min) / 2);
- if (buffer->info[mid].cluster < cluster_start)
- min = mid + 1;
- else
- max = mid;
- }
- unsigned int count = buffer->len;
- for (unsigned int i = min; i < count && buffer->info[i].cluster < cluster_end; i++)
- buffer->info[i].mask = (buffer->info[i].mask & not_mask) | value;
+hb_bool_t
+hb_buffer_allocation_successful (hb_buffer_t *buffer)
+{
+ return !buffer->in_error;
+}
+
+void
+hb_buffer_add (hb_buffer_t *buffer,
+ hb_codepoint_t codepoint,
+ hb_mask_t mask,
+ unsigned int cluster)
+{
+ buffer->add (codepoint, mask, cluster);
}
+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;
-/* Public API again */
+ /* 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;
+ return true;
+}
unsigned int
hb_buffer_get_length (hb_buffer_t *buffer)
/* Return value valid as long as buffer not modified */
hb_glyph_info_t *
-hb_buffer_get_glyph_infos (hb_buffer_t *buffer)
+hb_buffer_get_glyph_infos (hb_buffer_t *buffer,
+ unsigned int *length)
{
+ if (length)
+ *length = buffer->len;
+
return (hb_glyph_info_t *) buffer->info;
}
/* Return value valid as long as buffer not modified */
hb_glyph_position_t *
-hb_buffer_get_glyph_positions (hb_buffer_t *buffer)
+hb_buffer_get_glyph_positions (hb_buffer_t *buffer,
+ unsigned int *length)
{
if (!buffer->have_positions)
- hb_buffer_clear_positions (buffer);
-
- return (hb_glyph_position_t *) buffer->pos;
-}
-
-
-static void
-reverse_range (hb_buffer_t *buffer,
- unsigned int start,
- unsigned int end)
-{
- unsigned int i, j;
-
- for (i = start, j = end - 1; i < j; i++, j--) {
- hb_internal_glyph_info_t t;
-
- t = buffer->info[i];
- buffer->info[i] = buffer->info[j];
- buffer->info[j] = t;
- }
+ buffer->clear_positions ();
- if (buffer->pos) {
- for (i = 0, j = end - 1; i < j; i++, j--) {
- hb_internal_glyph_position_t t;
+ if (length)
+ *length = buffer->len;
- t = buffer->pos[i];
- buffer->pos[i] = buffer->pos[j];
- buffer->pos[j] = t;
- }
- }
+ return (hb_glyph_position_t *) buffer->pos;
}
void
hb_buffer_reverse (hb_buffer_t *buffer)
{
- if (unlikely (!buffer->len))
- return;
-
- reverse_range (buffer, 0, buffer->len);
+ buffer->reverse ();
}
void
hb_buffer_reverse_clusters (hb_buffer_t *buffer)
{
- unsigned int i, start, count, last_cluster;
-
- if (unlikely (!buffer->len))
- return;
-
- hb_buffer_reverse (buffer);
-
- count = buffer->len;
- start = 0;
- last_cluster = buffer->info[0].cluster;
- for (i = 1; i < count; i++) {
- if (last_cluster != buffer->info[i].cluster) {
- reverse_range (buffer, start, i);
- start = i;
- last_cluster = buffer->info[i].cluster;
- }
- }
- reverse_range (buffer, start, i);
+ buffer->reverse_clusters ();
}
+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_glyph (buffer, u, 1, old_next - (const T *) text); \
+ hb_buffer_add (buffer, u, 1, old_next - (const T *) text); \
} \
} HB_STMT_END
uint8_t c = *text;
unsigned int mask, len;
- /* TODO check for overlong sequences? also: optimize? */
+ /* TODO check for overlong sequences? */
UTF8_COMPUTE (c, mask, len);
if (unlikely (!len || (unsigned int) (end - text) < len)) {
void
hb_buffer_add_utf8 (hb_buffer_t *buffer,
const char *text,
- unsigned int text_length HB_UNUSED,
+ int text_length,
unsigned int item_offset,
- unsigned int item_length)
+ int item_length)
{
#define UTF_NEXT(S, E, U) hb_utf8_next (S, E, &(U))
ADD_UTF (uint8_t);
if (unlikely (c >= 0xd800 && c < 0xdc00)) {
/* high surrogate */
uint16_t l;
- if (text < end && ((l = *text), unlikely (l >= 0xdc00 && l < 0xe000))) {
+ if (text < end && ((l = *text), likely (l >= 0xdc00 && l < 0xe000))) {
/* low surrogate */
*unicode = ((hb_codepoint_t) ((c) - 0xd800) * 0x400 + (l) - 0xdc00 + 0x10000);
text++;
void
hb_buffer_add_utf16 (hb_buffer_t *buffer,
const uint16_t *text,
- unsigned int text_length HB_UNUSED,
+ int text_length,
unsigned int item_offset,
- unsigned int item_length)
+ int item_length)
{
#define UTF_NEXT(S, E, U) hb_utf16_next (S, E, &(U))
ADD_UTF (uint16_t);
void
hb_buffer_add_utf32 (hb_buffer_t *buffer,
const uint32_t *text,
- unsigned int text_length HB_UNUSED,
+ int text_length,
unsigned int item_offset,
- unsigned int item_length)
+ int item_length)
{
#define UTF_NEXT(S, E, U) ((U) = *(S), (S)+1)
ADD_UTF (uint32_t);
}
-HB_END_DECLS
projects / framework / uifw / harfbuzz.git / blobdiff