diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-buffer.cc')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-buffer.cc | 255 |
1 files changed, 190 insertions, 65 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-buffer.cc b/src/3rdparty/harfbuzz-ng/src/hb-buffer.cc index 6a9ee3ccc8..f557ceee56 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-buffer.cc +++ b/src/3rdparty/harfbuzz-ng/src/hb-buffer.cc @@ -51,7 +51,7 @@ * Checks the equality of two #hb_segment_properties_t's. * * Return value: - * %true if all properties of @a equal those of @b, %false otherwise. + * `true` if all properties of @a equal those of @b, `false` otherwise. * * Since: 0.9.7 **/ @@ -81,8 +81,8 @@ hb_segment_properties_equal (const hb_segment_properties_t *a, unsigned int hb_segment_properties_hash (const hb_segment_properties_t *p) { - return (unsigned int) p->direction ^ - (unsigned int) p->script ^ + return ((unsigned int) p->direction * 31 + + (unsigned int) p->script) * 31 + (intptr_t) (p->language); } @@ -172,12 +172,13 @@ hb_buffer_t::enlarge (unsigned int size) while (size >= new_allocated) new_allocated += (new_allocated >> 1) + 32; - static_assert ((sizeof (info[0]) == sizeof (pos[0])), ""); - if (unlikely (hb_unsigned_mul_overflows (new_allocated, sizeof (info[0])))) + unsigned new_bytes; + if (unlikely (hb_unsigned_mul_overflows (new_allocated, sizeof (info[0]), &new_bytes))) goto done; - new_pos = (hb_glyph_position_t *) hb_realloc (pos, new_allocated * sizeof (pos[0])); - new_info = (hb_glyph_info_t *) hb_realloc (info, new_allocated * sizeof (info[0])); + static_assert (sizeof (info[0]) == sizeof (pos[0]), ""); + new_pos = (hb_glyph_position_t *) hb_realloc (pos, new_bytes); + new_info = (hb_glyph_info_t *) hb_realloc (info, new_bytes); done: if (unlikely (!new_pos || !new_info)) @@ -208,7 +209,7 @@ hb_buffer_t::make_room_for (unsigned int num_in, assert (have_output); out_info = (hb_glyph_info_t *) pos; - memcpy (out_info, info, out_len * sizeof (out_info[0])); + hb_memcpy (out_info, info, out_len * sizeof (out_info[0])); } return true; @@ -229,7 +230,7 @@ hb_buffer_t::shift_forward (unsigned int count) * Ideally, we should at least set Default_Ignorable bits on * these, as well as consistent cluster values. But the former * is layering violation... */ - memset (info + len, 0, (idx + count - len) * sizeof (info[0])); + hb_memset (info + len, 0, (idx + count - len) * sizeof (info[0])); } len += count; idx += count; @@ -289,6 +290,7 @@ hb_buffer_t::clear () props = default_props; successful = true; + shaping_failed = false; have_output = false; have_positions = false; @@ -297,8 +299,8 @@ hb_buffer_t::clear () out_len = 0; out_info = info; - memset (context, 0, sizeof context); - memset (context_len, 0, sizeof context_len); + hb_memset (context, 0, sizeof context); + hb_memset (context_len, 0, sizeof context_len); deallocate_var_all (); serial = 0; @@ -310,16 +312,16 @@ hb_buffer_t::enter () { deallocate_var_all (); serial = 0; + shaping_failed = false; scratch_flags = HB_BUFFER_SCRATCH_FLAG_DEFAULT; - if (likely (!hb_unsigned_mul_overflows (len, HB_BUFFER_MAX_LEN_FACTOR))) + unsigned mul; + if (likely (!hb_unsigned_mul_overflows (len, HB_BUFFER_MAX_LEN_FACTOR, &mul))) { - max_len = hb_max (len * HB_BUFFER_MAX_LEN_FACTOR, - (unsigned) HB_BUFFER_MAX_LEN_MIN); + max_len = hb_max (mul, (unsigned) HB_BUFFER_MAX_LEN_MIN); } - if (likely (!hb_unsigned_mul_overflows (len, HB_BUFFER_MAX_OPS_FACTOR))) + if (likely (!hb_unsigned_mul_overflows (len, HB_BUFFER_MAX_OPS_FACTOR, &mul))) { - max_ops = hb_max (len * HB_BUFFER_MAX_OPS_FACTOR, - (unsigned) HB_BUFFER_MAX_OPS_MIN); + max_ops = hb_max (mul, (unsigned) HB_BUFFER_MAX_OPS_MIN); } } void @@ -329,6 +331,7 @@ hb_buffer_t::leave () max_ops = HB_BUFFER_MAX_OPS_DEFAULT; deallocate_var_all (); serial = 0; + // Intentionally not reseting shaping_failed, such that it can be inspected. } @@ -342,7 +345,7 @@ hb_buffer_t::add (hb_codepoint_t codepoint, glyph = &info[len]; - memset (glyph, 0, sizeof (*glyph)); + hb_memset (glyph, 0, sizeof (*glyph)); glyph->codepoint = codepoint; glyph->mask = 0; glyph->cluster = cluster; @@ -384,9 +387,11 @@ hb_buffer_t::clear_positions () hb_memset (pos, 0, sizeof (pos[0]) * len); } -void +bool hb_buffer_t::sync () { + bool ret = false; + assert (have_output); assert (idx <= len); @@ -400,12 +405,39 @@ hb_buffer_t::sync () info = out_info; } len = out_len; + ret = true; reset: have_output = false; out_len = 0; out_info = info; idx = 0; + + return ret; +} + +int +hb_buffer_t::sync_so_far () +{ + bool had_output = have_output; + unsigned out_i = out_len; + unsigned i = idx; + unsigned old_idx = idx; + + if (sync ()) + idx = out_i; + else + idx = i; + + if (had_output) + { + have_output = true; + out_len = idx; + } + + assert (idx <= len); + + return idx - old_idx; } bool @@ -490,15 +522,17 @@ hb_buffer_t::merge_clusters_impl (unsigned int start, cluster = hb_min (cluster, info[i].cluster); /* Extend end */ - while (end < len && info[end - 1].cluster == info[end].cluster) - end++; + if (cluster != info[end - 1].cluster) + 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 (cluster != info[start].cluster) + 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) + if (idx == start && info[start].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); @@ -542,7 +576,8 @@ 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) + if ((idx + 1 < len && cluster == info[idx + 1].cluster) || + (out_len && cluster == out_info[out_len - 1].cluster)) { /* Cluster survives; do nothing. */ goto done; @@ -573,6 +608,53 @@ done: } void +hb_buffer_t::delete_glyphs_inplace (bool (*filter) (const hb_glyph_info_t *info)) +{ + /* Merge clusters and delete filtered glyphs. + * NOTE! We can't use out-buffer as we have positioning data. */ + unsigned int j = 0; + unsigned int count = len; + for (unsigned int i = 0; i < count; i++) + { + if (filter (&info[i])) + { + /* Merge clusters. + * Same logic as delete_glyph(), but for in-place removal. */ + + unsigned int cluster = info[i].cluster; + if (i + 1 < count && cluster == info[i + 1].cluster) + continue; /* Cluster survives; do nothing. */ + + if (j) + { + /* Merge cluster backward. */ + if (cluster < info[j - 1].cluster) + { + unsigned int mask = info[i].mask; + unsigned int old_cluster = info[j - 1].cluster; + for (unsigned k = j; k && info[k - 1].cluster == old_cluster; k--) + set_cluster (info[k - 1], cluster, mask); + } + continue; + } + + if (i + 1 < count) + merge_clusters (i, i + 2); /* Merge cluster forward. */ + + continue; + } + + if (j != i) + { + info[j] = info[i]; + pos[j] = pos[i]; + } + j++; + } + len = j; +} + +void hb_buffer_t::guess_segment_properties () { assert_unicode (); @@ -623,6 +705,7 @@ DEFINE_NULL_INSTANCE (hb_buffer_t) = HB_SEGMENT_PROPERTIES_DEFAULT, false, /* successful */ + true, /* shaping_failed */ false, /* have_output */ true /* have_positions */ @@ -631,16 +714,16 @@ DEFINE_NULL_INSTANCE (hb_buffer_t) = /** - * hb_buffer_create: (Xconstructor) + * hb_buffer_create: * * 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 + * 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. + * hb_buffer_allocation_successful() returns `false`. * * Since: 0.9.2 **/ @@ -770,7 +853,7 @@ hb_buffer_destroy (hb_buffer_t *buffer) * * Attaches a user-data key/data pair to the specified buffer. * - * Return value: %true if success, %false otherwise + * Return value: `true` if success, `false` otherwise * * Since: 0.9.2 **/ @@ -797,7 +880,7 @@ hb_buffer_set_user_data (hb_buffer_t *buffer, * Since: 0.9.2 **/ void * -hb_buffer_get_user_data (hb_buffer_t *buffer, +hb_buffer_get_user_data (const hb_buffer_t *buffer, hb_user_data_key_t *key) { return hb_object_get_user_data (buffer, key); @@ -812,6 +895,32 @@ hb_buffer_get_user_data (hb_buffer_t *buffer, * Sets the type of @buffer contents. Buffers are either empty, contain * characters (before shaping), or contain glyphs (the result of shaping). * + * You rarely need to call this function, since a number of other + * functions transition the content type for you. Namely: + * + * - A newly created buffer starts with content type + * %HB_BUFFER_CONTENT_TYPE_INVALID. Calling hb_buffer_reset(), + * hb_buffer_clear_contents(), as well as calling hb_buffer_set_length() + * with an argument of zero all set the buffer content type to invalid + * as well. + * + * - Calling hb_buffer_add_utf8(), hb_buffer_add_utf16(), + * hb_buffer_add_utf32(), hb_buffer_add_codepoints() and + * hb_buffer_add_latin1() expect that buffer is either empty and + * have a content type of invalid, or that buffer content type is + * %HB_BUFFER_CONTENT_TYPE_UNICODE, and they also set the content + * type to Unicode if they added anything to an empty buffer. + * + * - Finally hb_shape() and hb_shape_full() expect that the buffer + * is either empty and have content type of invalid, or that buffer + * content type is %HB_BUFFER_CONTENT_TYPE_UNICODE, and upon + * success they set the buffer content type to + * %HB_BUFFER_CONTENT_TYPE_GLYPHS. + * + * The above transitions are designed such that one can use a buffer + * in a loop of "reset : add-text : shape" without needing to ever + * modify the content type manually. + * * Since: 0.9.5 **/ void @@ -834,7 +943,7 @@ hb_buffer_set_content_type (hb_buffer_t *buffer, * Since: 0.9.5 **/ hb_buffer_content_type_t -hb_buffer_get_content_type (hb_buffer_t *buffer) +hb_buffer_get_content_type (const hb_buffer_t *buffer) { return buffer->content_type; } @@ -876,7 +985,7 @@ hb_buffer_set_unicode_funcs (hb_buffer_t *buffer, * Since: 0.9.2 **/ hb_unicode_funcs_t * -hb_buffer_get_unicode_funcs (hb_buffer_t *buffer) +hb_buffer_get_unicode_funcs (const hb_buffer_t *buffer) { return buffer->unicode; } @@ -899,7 +1008,6 @@ hb_buffer_get_unicode_funcs (hb_buffer_t *buffer) void hb_buffer_set_direction (hb_buffer_t *buffer, hb_direction_t direction) - { if (unlikely (hb_object_is_immutable (buffer))) return; @@ -919,7 +1027,7 @@ hb_buffer_set_direction (hb_buffer_t *buffer, * Since: 0.9.2 **/ hb_direction_t -hb_buffer_get_direction (hb_buffer_t *buffer) +hb_buffer_get_direction (const hb_buffer_t *buffer) { return buffer->props.direction; } @@ -963,7 +1071,7 @@ hb_buffer_set_script (hb_buffer_t *buffer, * Since: 0.9.2 **/ hb_script_t -hb_buffer_get_script (hb_buffer_t *buffer) +hb_buffer_get_script (const hb_buffer_t *buffer) { return buffer->props.script; } @@ -1007,7 +1115,7 @@ hb_buffer_set_language (hb_buffer_t *buffer, * Since: 0.9.2 **/ hb_language_t -hb_buffer_get_language (hb_buffer_t *buffer) +hb_buffer_get_language (const hb_buffer_t *buffer) { return buffer->props.language; } @@ -1043,7 +1151,7 @@ hb_buffer_set_segment_properties (hb_buffer_t *buffer, * Since: 0.9.7 **/ void -hb_buffer_get_segment_properties (hb_buffer_t *buffer, +hb_buffer_get_segment_properties (const hb_buffer_t *buffer, hb_segment_properties_t *props) { *props = buffer->props; @@ -1081,7 +1189,7 @@ hb_buffer_set_flags (hb_buffer_t *buffer, * Since: 0.9.7 **/ hb_buffer_flags_t -hb_buffer_get_flags (hb_buffer_t *buffer) +hb_buffer_get_flags (const hb_buffer_t *buffer) { return buffer->flags; } @@ -1120,7 +1228,7 @@ hb_buffer_set_cluster_level (hb_buffer_t *buffer, * Since: 0.9.42 **/ hb_buffer_cluster_level_t -hb_buffer_get_cluster_level (hb_buffer_t *buffer) +hb_buffer_get_cluster_level (const hb_buffer_t *buffer) { return buffer->cluster_level; } @@ -1161,7 +1269,7 @@ hb_buffer_set_replacement_codepoint (hb_buffer_t *buffer, * Since: 0.9.31 **/ hb_codepoint_t -hb_buffer_get_replacement_codepoint (hb_buffer_t *buffer) +hb_buffer_get_replacement_codepoint (const hb_buffer_t *buffer) { return buffer->replacement; } @@ -1201,7 +1309,7 @@ hb_buffer_set_invisible_glyph (hb_buffer_t *buffer, * Since: 2.0.0 **/ hb_codepoint_t -hb_buffer_get_invisible_glyph (hb_buffer_t *buffer) +hb_buffer_get_invisible_glyph (const hb_buffer_t *buffer) { return buffer->invisible; } @@ -1241,7 +1349,7 @@ hb_buffer_set_not_found_glyph (hb_buffer_t *buffer, * Since: 3.1.0 **/ hb_codepoint_t -hb_buffer_get_not_found_glyph (hb_buffer_t *buffer) +hb_buffer_get_not_found_glyph (const hb_buffer_t *buffer) { return buffer->not_found; } @@ -1273,7 +1381,7 @@ hb_buffer_clear_contents (hb_buffer_t *buffer) * Pre allocates memory for @buffer to fit at least @size number of items. * * Return value: - * %true if @buffer memory allocation succeeded, %false otherwise + * `true` if @buffer memory allocation succeeded, `false` otherwise * * Since: 0.9.2 **/ @@ -1290,7 +1398,7 @@ hb_buffer_pre_allocate (hb_buffer_t *buffer, unsigned int size) * Check if allocating memory for the buffer succeeded. * * Return value: - * %true if @buffer memory allocation succeeded, %false otherwise. + * `true` if @buffer memory allocation succeeded, `false` otherwise. * * Since: 0.9.2 **/ @@ -1335,7 +1443,7 @@ hb_buffer_add (hb_buffer_t *buffer, * end. * * Return value: - * %true if @buffer memory allocation succeeded, %false otherwise. + * `true` if @buffer memory allocation succeeded, `false` otherwise. * * Since: 0.9.2 **/ @@ -1351,9 +1459,9 @@ hb_buffer_set_length (hb_buffer_t *buffer, /* Wipe the new space */ if (length > buffer->len) { - memset (buffer->info + buffer->len, 0, sizeof (buffer->info[0]) * (length - buffer->len)); + hb_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)); + hb_memset (buffer->pos + buffer->len, 0, sizeof (buffer->pos[0]) * (length - buffer->len)); } buffer->len = length; @@ -1381,7 +1489,7 @@ hb_buffer_set_length (hb_buffer_t *buffer, * Since: 0.9.2 **/ unsigned int -hb_buffer_get_length (hb_buffer_t *buffer) +hb_buffer_get_length (const hb_buffer_t *buffer) { return buffer->len; } @@ -1421,7 +1529,7 @@ hb_buffer_get_glyph_infos (hb_buffer_t *buffer, * If buffer did not have positions before, the positions will be * initialized to zeros, unless this function is called from * within a buffer message callback (see hb_buffer_set_message_func()), - * in which case %NULL is returned. + * in which case `NULL` is returned. * * Return value: (transfer none) (array length=length): * The @buffer glyph position array. @@ -1456,7 +1564,7 @@ hb_buffer_get_glyph_positions (hb_buffer_t *buffer, * and cleared of position data when hb_buffer_clear_contents() is called. * * Return value: - * %true if the @buffer has position array, %false otherwise. + * `true` if the @buffer has position array, `false` otherwise. * * Since: 2.7.3 **/ @@ -1640,10 +1748,10 @@ hb_buffer_add_utf (hb_buffer_t *buffer, * @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. + * @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). + * end of @text (assuming it is `NULL` terminated). * * See hb_buffer_add_codepoints(). * @@ -1666,10 +1774,10 @@ hb_buffer_add_utf8 (hb_buffer_t *buffer, * 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 + * @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) + * end of @text (assuming it is `NULL` terminated) * * See hb_buffer_add_codepoints(). * @@ -1692,10 +1800,10 @@ hb_buffer_add_utf16 (hb_buffer_t *buffer, * 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 + * @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) + * end of @text (assuming it is `NULL` terminated) * * See hb_buffer_add_codepoints(). * @@ -1719,10 +1827,10 @@ hb_buffer_add_utf32 (hb_buffer_t *buffer, * @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 + * @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) + * 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. @@ -1745,10 +1853,10 @@ hb_buffer_add_latin1 (hb_buffer_t *buffer, * 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. + * @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). + * 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 @@ -1761,7 +1869,9 @@ hb_buffer_add_latin1 (hb_buffer_t *buffer, * 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. + * to ensure it contains a valid Unicode scalar values. In contrast, + * hb_buffer_add_utf32() can be used that takes similar input but performs + * sanity-check on the input. * * Since: 0.9.31 **/ @@ -1824,9 +1934,9 @@ hb_buffer_append (hb_buffer_t *buffer, hb_segment_properties_overlay (&buffer->props, &source->props); - memcpy (buffer->info + orig_len, source->info + start, (end - start) * sizeof (buffer->info[0])); + hb_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])); + hb_memcpy (buffer->pos + orig_len, source->pos + start, (end - start) * sizeof (buffer->pos[0])); if (source->content_type == HB_BUFFER_CONTENT_TYPE_UNICODE) { @@ -2014,7 +2124,7 @@ hb_buffer_diff (hb_buffer_t *buffer, 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)) + 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; @@ -2069,6 +2179,13 @@ hb_buffer_set_message_func (hb_buffer_t *buffer, hb_buffer_message_func_t func, void *user_data, hb_destroy_func_t destroy) { + if (unlikely (hb_object_is_immutable (buffer))) + { + if (destroy) + destroy (user_data); + return; + } + if (buffer->message_destroy) buffer->message_destroy (buffer->message_data); @@ -2085,8 +2202,16 @@ hb_buffer_set_message_func (hb_buffer_t *buffer, bool hb_buffer_t::message_impl (hb_font_t *font, const char *fmt, va_list ap) { + assert (!have_output || (out_info == info && out_len == idx)); + + message_depth++; + char buf[100]; vsnprintf (buf, sizeof (buf), fmt, ap); - return (bool) this->message_func (this, font, buf, this->message_data); + bool ret = (bool) this->message_func (this, font, buf, this->message_data); + + message_depth--; + + return ret; } #endif |