diff options
Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-buffer.cc')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-buffer.cc | 424 |
1 files changed, 196 insertions, 228 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-buffer.cc b/src/3rdparty/harfbuzz-ng/src/hb-buffer.cc index 6131c86177..8cad6ab8e6 100644 --- a/src/3rdparty/harfbuzz-ng/src/hb-buffer.cc +++ b/src/3rdparty/harfbuzz-ng/src/hb-buffer.cc @@ -37,8 +37,9 @@ * @short_description: Input and output buffers * @include: hb.h * - * Buffers serve dual role in HarfBuzz; they hold the input characters that are - * passed to hb_shape(), and after shaping they hold the output glyphs. + * Buffers serve a dual role in HarfBuzz; before shaping, they hold + * the input characters that are passed to hb_shape(), and after + * shaping they hold the output glyphs. **/ @@ -50,7 +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 **/ @@ -217,9 +218,6 @@ hb_buffer_t::get_scratch_buffer (unsigned int *size) void hb_buffer_t::reset () { - if (unlikely (hb_object_is_immutable (this))) - return; - hb_unicode_funcs_destroy (unicode); unicode = hb_unicode_funcs_reference (hb_unicode_funcs_get_default ()); flags = HB_BUFFER_FLAG_DEFAULT; @@ -232,9 +230,6 @@ hb_buffer_t::reset () void hb_buffer_t::clear () { - if (unlikely (hb_object_is_immutable (this))) - return; - hb_segment_properties_t default_props = HB_SEGMENT_PROPERTIES_DEFAULT; props = default_props; scratch_flags = HB_BUFFER_SCRATCH_FLAG_DEFAULT; @@ -289,9 +284,6 @@ hb_buffer_t::add_info (const hb_glyph_info_t &glyph_info) void hb_buffer_t::remove_output () { - if (unlikely (hb_object_is_immutable (this))) - return; - have_output = false; have_positions = false; @@ -302,9 +294,6 @@ hb_buffer_t::remove_output () void hb_buffer_t::clear_output () { - if (unlikely (hb_object_is_immutable (this))) - return; - have_output = true; have_positions = false; @@ -315,9 +304,6 @@ hb_buffer_t::clear_output () void hb_buffer_t::clear_positions () { - if (unlikely (hb_object_is_immutable (this))) - return; - have_output = false; have_positions = true; @@ -332,15 +318,19 @@ hb_buffer_t::swap_buffers () { if (unlikely (!successful)) return; + assert (idx <= len); + if (unlikely (!next_glyphs (len - idx))) return; + assert (have_output); have_output = false; if (out_info != info) { - hb_glyph_info_t *tmp_string; - tmp_string = info; + hb_glyph_info_t *tmp; + tmp = info; info = out_info; - out_info = tmp_string; + out_info = tmp; + pos = (hb_glyph_position_t *) out_info; } @@ -352,31 +342,6 @@ hb_buffer_t::swap_buffers () 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; - - assert (idx + num_in <= len); - - 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; -} - bool hb_buffer_t::move_to (unsigned int i) { @@ -438,13 +403,6 @@ hb_buffer_t::set_masks (hb_mask_t value, 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) @@ -455,27 +413,13 @@ void hb_buffer_t::reverse_range (unsigned int start, unsigned int end) { - unsigned int i, j; - if (end - start < 2) 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; - } + hb_array_t<hb_glyph_info_t> (info, len).reverse (start, end); if (have_positions) { - 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_array_t<hb_glyph_position_t> (pos, len).reverse (start, end); } } @@ -612,7 +556,7 @@ done: void hb_buffer_t::unsafe_to_break_impl (unsigned int start, unsigned int end) { - unsigned int cluster = (unsigned int) -1; + unsigned int cluster = UINT_MAX; cluster = _unsafe_to_break_find_min_cluster (info, start, end, cluster); _unsafe_to_break_set_mask (info, start, end, cluster); } @@ -628,7 +572,7 @@ hb_buffer_t::unsafe_to_break_from_outbuffer (unsigned int start, unsigned int en assert (start <= out_len); assert (idx <= end); - unsigned int cluster = (unsigned int) -1; + unsigned int cluster = UINT_MAX; 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); @@ -638,8 +582,7 @@ hb_buffer_t::unsafe_to_break_from_outbuffer (unsigned int start, unsigned int en void hb_buffer_t::guess_segment_properties () { - assert (content_type == HB_BUFFER_CONTENT_TYPE_UNICODE || - (!len && content_type == HB_BUFFER_CONTENT_TYPE_INVALID)); + assert_unicode (); /* If script is set to INVALID, guess from buffer contents */ if (props.script == HB_SCRIPT_INVALID) { @@ -727,21 +670,21 @@ hb_buffer_create () /** * hb_buffer_get_empty: * + * Fetches an empty #hb_buffer_t. * - * - * Return value: (transfer full): + * Return value: (transfer full): The empty buffer * * Since: 0.9.2 **/ hb_buffer_t * hb_buffer_get_empty () { - return const_cast<hb_buffer_t *> (&Null(hb_buffer_t)); + return const_cast<hb_buffer_t *> (&Null (hb_buffer_t)); } /** * hb_buffer_reference: (skip) - * @buffer: an #hb_buffer_t. + * @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. @@ -759,7 +702,7 @@ hb_buffer_reference (hb_buffer_t *buffer) /** * hb_buffer_destroy: (skip) - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * * Deallocate the @buffer. * Decreases the reference count on @buffer by one. If the result is zero, then @@ -786,15 +729,15 @@ hb_buffer_destroy (hb_buffer_t *buffer) /** * hb_buffer_set_user_data: (skip) - * @buffer: an #hb_buffer_t. - * @key: - * @data: - * @destroy: - * @replace: + * @buffer: An #hb_buffer_t + * @key: The user-data key + * @data: A pointer to the user data + * @destroy: (nullable): A callback to call when @data is not needed anymore + * @replace: Whether to replace an existing data with the same key * + * Attaches a user-data key/data pair to the specified buffer. * - * - * Return value: + * Return value: %true if success, %false otherwise * * Since: 0.9.2 **/ @@ -810,12 +753,13 @@ hb_buffer_set_user_data (hb_buffer_t *buffer, /** * hb_buffer_get_user_data: (skip) - * @buffer: an #hb_buffer_t. - * @key: + * @buffer: An #hb_buffer_t + * @key: The user-data key to query * + * Fetches the user data associated with the specified key, + * attached to the specified buffer. * - * - * Return value: + * Return value: (transfer none): A pointer to the user data * * Since: 0.9.2 **/ @@ -829,11 +773,11 @@ hb_buffer_get_user_data (hb_buffer_t *buffer, /** * hb_buffer_set_content_type: - * @buffer: an #hb_buffer_t. - * @content_type: the type of buffer contents to set + * @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). + * Sets the type of @buffer contents. Buffers are either empty, contain + * characters (before shaping), or contain glyphs (the result of shaping). * * Since: 0.9.5 **/ @@ -846,12 +790,13 @@ hb_buffer_set_content_type (hb_buffer_t *buffer, /** * hb_buffer_get_content_type: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * - * see hb_buffer_set_content_type(). + * Fetches the type of @buffer contents. Buffers are either empty, contain + * characters (before shaping), or contain glyphs (the result of shaping). * * Return value: - * The type of @buffer contents. + * The type of @buffer contents * * Since: 0.9.5 **/ @@ -864,10 +809,11 @@ hb_buffer_get_content_type (hb_buffer_t *buffer) /** * hb_buffer_set_unicode_funcs: - * @buffer: an #hb_buffer_t. - * @unicode_funcs: - * + * @buffer: An #hb_buffer_t + * @unicode_funcs: The Unicode-functions structure * + * Sets the Unicode-functions structure of a buffer to + * @unicode_funcs. * * Since: 0.9.2 **/ @@ -888,11 +834,11 @@ hb_buffer_set_unicode_funcs (hb_buffer_t *buffer, /** * hb_buffer_get_unicode_funcs: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * + * Fetches the Unicode-functions structure of a buffer. * - * - * Return value: + * Return value: The Unicode-functions structure * * Since: 0.9.2 **/ @@ -904,7 +850,7 @@ hb_buffer_get_unicode_funcs (hb_buffer_t *buffer) /** * hb_buffer_set_direction: - * @buffer: an #hb_buffer_t. + * @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 @@ -930,7 +876,7 @@ hb_buffer_set_direction (hb_buffer_t *buffer, /** * hb_buffer_get_direction: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * * See hb_buffer_set_direction() * @@ -947,8 +893,8 @@ hb_buffer_get_direction (hb_buffer_t *buffer) /** * hb_buffer_set_script: - * @buffer: an #hb_buffer_t. - * @script: an #hb_script_t to set. + * @buffer: An #hb_buffer_t + * @script: An #hb_script_t to set. * * Sets the script of @buffer to @script. * @@ -958,7 +904,7 @@ hb_buffer_get_direction (hb_buffer_t *buffer) * * 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. + * corresponding script from an ISO 15924 script tag. * * Since: 0.9.2 **/ @@ -974,12 +920,12 @@ hb_buffer_set_script (hb_buffer_t *buffer, /** * hb_buffer_get_script: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * - * See hb_buffer_set_script(). + * Fetches the script of @buffer. * * Return value: - * The #hb_script_t of the @buffer. + * The #hb_script_t of the @buffer * * Since: 0.9.2 **/ @@ -991,8 +937,8 @@ hb_buffer_get_script (hb_buffer_t *buffer) /** * hb_buffer_set_language: - * @buffer: an #hb_buffer_t. - * @language: an hb_language_t to set. + * @buffer: An #hb_buffer_t + * @language: An hb_language_t to set * * Sets the language of @buffer to @language. * @@ -1001,7 +947,7 @@ hb_buffer_get_script (hb_buffer_t *buffer) * 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 BCP 47 language tags to + * Use hb_language_from_string() to convert from BCP 47 language tags to * #hb_language_t. * * Since: 0.9.2 @@ -1018,7 +964,7 @@ hb_buffer_set_language (hb_buffer_t *buffer, /** * hb_buffer_get_language: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * * See hb_buffer_set_language(). * @@ -1035,8 +981,8 @@ hb_buffer_get_language (hb_buffer_t *buffer) /** * hb_buffer_set_segment_properties: - * @buffer: an #hb_buffer_t. - * @props: an #hb_segment_properties_t to use. + * @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 @@ -1056,8 +1002,8 @@ hb_buffer_set_segment_properties (hb_buffer_t *buffer, /** * hb_buffer_get_segment_properties: - * @buffer: an #hb_buffer_t. - * @props: (out): the output #hb_segment_properties_t. + * @buffer: An #hb_buffer_t + * @props: (out): The output #hb_segment_properties_t * * Sets @props to the #hb_segment_properties_t of @buffer. * @@ -1073,8 +1019,8 @@ hb_buffer_get_segment_properties (hb_buffer_t *buffer, /** * hb_buffer_set_flags: - * @buffer: an #hb_buffer_t. - * @flags: the buffer flags to set. + * @buffer: An #hb_buffer_t + * @flags: The buffer flags to set * * Sets @buffer flags to @flags. See #hb_buffer_flags_t. * @@ -1092,12 +1038,12 @@ hb_buffer_set_flags (hb_buffer_t *buffer, /** * hb_buffer_get_flags: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * - * See hb_buffer_set_flags(). + * Fetches the #hb_buffer_flags_t of @buffer. * * Return value: - * The @buffer flags. + * The @buffer flags * * Since: 0.9.7 **/ @@ -1109,16 +1055,18 @@ hb_buffer_get_flags (hb_buffer_t *buffer) /** * hb_buffer_set_cluster_level: - * @buffer: an #hb_buffer_t. - * @cluster_level: - * + * @buffer: An #hb_buffer_t + * @cluster_level: The cluster level to set on the buffer * + * Sets the cluster level of a buffer. The #hb_buffer_cluster_level_t + * dictates one aspect of how HarfBuzz will treat non-base characters + * during shaping. * * Since: 0.9.42 **/ void -hb_buffer_set_cluster_level (hb_buffer_t *buffer, - hb_buffer_cluster_level_t cluster_level) +hb_buffer_set_cluster_level (hb_buffer_t *buffer, + hb_buffer_cluster_level_t cluster_level) { if (unlikely (hb_object_is_immutable (buffer))) return; @@ -1128,11 +1076,13 @@ hb_buffer_set_cluster_level (hb_buffer_t *buffer, /** * hb_buffer_get_cluster_level: - * @buffer: an #hb_buffer_t. - * + * @buffer: An #hb_buffer_t * + * Fetches the cluster level of a buffer. The #hb_buffer_cluster_level_t + * dictates one aspect of how HarfBuzz will treat non-base characters + * during shaping. * - * Return value: + * Return value: The cluster level of @buffer * * Since: 0.9.42 **/ @@ -1145,13 +1095,13 @@ hb_buffer_get_cluster_level (hb_buffer_t *buffer) /** * hb_buffer_set_replacement_codepoint: - * @buffer: an #hb_buffer_t. + * @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. + * Default is #HB_BUFFER_REPLACEMENT_CODEPOINT_DEFAULT. * * Since: 0.9.31 **/ @@ -1167,12 +1117,13 @@ hb_buffer_set_replacement_codepoint (hb_buffer_t *buffer, /** * hb_buffer_get_replacement_codepoint: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * - * See hb_buffer_set_replacement_codepoint(). + * Fetches the #hb_codepoint_t that replaces invalid entries for a given encoding + * when adding text to @buffer. * * Return value: - * The @buffer replacement #hb_codepoint_t. + * The @buffer replacement #hb_codepoint_t * * Since: 0.9.31 **/ @@ -1185,7 +1136,7 @@ hb_buffer_get_replacement_codepoint (hb_buffer_t *buffer) /** * hb_buffer_set_invisible_glyph: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * @invisible: the invisible #hb_codepoint_t * * Sets the #hb_codepoint_t that replaces invisible characters in @@ -1207,12 +1158,12 @@ hb_buffer_set_invisible_glyph (hb_buffer_t *buffer, /** * hb_buffer_get_invisible_glyph: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * * See hb_buffer_set_invisible_glyph(). * * Return value: - * The @buffer invisible #hb_codepoint_t. + * The @buffer invisible #hb_codepoint_t * * Since: 2.0.0 **/ @@ -1225,7 +1176,7 @@ hb_buffer_get_invisible_glyph (hb_buffer_t *buffer) /** * hb_buffer_reset: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * * Resets the buffer to its initial status, as if it was just newly created * with hb_buffer_create(). @@ -1235,12 +1186,15 @@ hb_buffer_get_invisible_glyph (hb_buffer_t *buffer) void hb_buffer_reset (hb_buffer_t *buffer) { + if (unlikely (hb_object_is_immutable (buffer))) + return; + buffer->reset (); } /** * hb_buffer_clear_contents: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * * Similar to hb_buffer_reset(), but does not clear the Unicode functions and * the replacement code point. @@ -1250,18 +1204,21 @@ hb_buffer_reset (hb_buffer_t *buffer) void hb_buffer_clear_contents (hb_buffer_t *buffer) { + if (unlikely (hb_object_is_immutable (buffer))) + return; + buffer->clear (); } /** * hb_buffer_pre_allocate: - * @buffer: an #hb_buffer_t. - * @size: number of items to 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. + * %true if @buffer memory allocation succeeded, %false otherwise * * Since: 0.9.2 **/ @@ -1273,7 +1230,7 @@ hb_buffer_pre_allocate (hb_buffer_t *buffer, unsigned int size) /** * hb_buffer_allocation_successful: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * * Check if allocating memory for the buffer succeeded. * @@ -1290,9 +1247,9 @@ hb_buffer_allocation_successful (hb_buffer_t *buffer) /** * hb_buffer_add: - * @buffer: an #hb_buffer_t. - * @codepoint: a Unicode code point. - * @cluster: the cluster value of @codepoint. + * @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 @@ -1316,8 +1273,8 @@ hb_buffer_add (hb_buffer_t *buffer, /** * hb_buffer_set_length: - * @buffer: an #hb_buffer_t. - * @length: the new length of @buffer. + * @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. @@ -1334,7 +1291,7 @@ hb_buffer_set_length (hb_buffer_t *buffer, if (unlikely (hb_object_is_immutable (buffer))) return length == 0; - if (!buffer->ensure (length)) + if (unlikely (!buffer->ensure (length))) return false; /* Wipe the new space */ @@ -1358,7 +1315,7 @@ hb_buffer_set_length (hb_buffer_t *buffer, /** * hb_buffer_get_length: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * * Returns the number of items in the buffer. * @@ -1376,8 +1333,8 @@ hb_buffer_get_length (hb_buffer_t *buffer) /** * hb_buffer_get_glyph_infos: - * @buffer: an #hb_buffer_t. - * @length: (out): output array length. + * @buffer: An #hb_buffer_t + * @length: (out): The output-array length. * * Returns @buffer glyph information array. Returned pointer * is valid as long as @buffer contents are not modified. @@ -1400,8 +1357,8 @@ hb_buffer_get_glyph_infos (hb_buffer_t *buffer, /** * hb_buffer_get_glyph_positions: - * @buffer: an #hb_buffer_t. - * @length: (out): output length. + * @buffer: An #hb_buffer_t + * @length: (out): The output length * * Returns @buffer glyph position array. Returned pointer * is valid as long as @buffer contents are not modified. @@ -1426,13 +1383,32 @@ hb_buffer_get_glyph_positions (hb_buffer_t *buffer, } /** + * hb_buffer_has_positions: + * @buffer: an #hb_buffer_t. + * + * Returns whether @buffer has glyph position data. + * A buffer gains position data when hb_buffer_get_glyph_positions() is called on it, + * and cleared of position data when hb_buffer_clear_contents() is called. + * + * Return value: + * %true if the @buffer has position array, %false otherwise. + * + * Since: 2.7.3 + **/ +HB_EXTERN hb_bool_t +hb_buffer_has_positions (hb_buffer_t *buffer) +{ + return buffer->have_positions; +} + +/** * hb_glyph_info_get_glyph_flags: - * @info: a #hb_glyph_info_t. + * @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. + * The #hb_glyph_flags_t encoded within @info * * Since: 1.5.0 **/ @@ -1444,7 +1420,7 @@ hb_glyph_flags_t /** * hb_buffer_reverse: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * * Reverses buffer contents. * @@ -1458,11 +1434,11 @@ hb_buffer_reverse (hb_buffer_t *buffer) /** * hb_buffer_reverse_range: - * @buffer: an #hb_buffer_t. - * @start: start index. - * @end: end index. + * @buffer: An #hb_buffer_t + * @start: start index + * @end: end index * - * Reverses buffer contents between start to end. + * Reverses buffer contents between @start and @end. * * Since: 0.9.41 **/ @@ -1475,7 +1451,7 @@ hb_buffer_reverse_range (hb_buffer_t *buffer, /** * hb_buffer_reverse_clusters: - * @buffer: an #hb_buffer_t. + * @buffer: An #hb_buffer_t * * Reverses buffer clusters. That is, the buffer contents are * reversed, then each cluster (consecutive items having the @@ -1491,24 +1467,24 @@ hb_buffer_reverse_clusters (hb_buffer_t *buffer) /** * hb_buffer_guess_segment_properties: - * @buffer: an #hb_buffer_t. + * @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. + * #HB_BUFFER_CONTENT_TYPE_UNICODE. * - * If buffer script is not set (ie. is %HB_SCRIPT_INVALID), it + * 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. + * 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), + * 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. + * 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), + * 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. @@ -1534,8 +1510,7 @@ hb_buffer_add_utf (hb_buffer_t *buffer, 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)); + buffer->assert_unicode (); if (unlikely (hb_object_is_immutable (buffer))) return; @@ -1546,7 +1521,10 @@ hb_buffer_add_utf (hb_buffer_t *buffer, if (item_length == -1) item_length = text_length - item_offset; - buffer->ensure (buffer->len + item_length * sizeof (T) / 4); + if (unlikely (item_length < 0 || + item_length > INT_MAX / 8 || + !buffer->ensure (buffer->len + item_length * sizeof (T) / 4))) + return; /* If buffer is empty and pre-context provided, install it. * This check is written this way, to make sure people can @@ -1594,12 +1572,12 @@ hb_buffer_add_utf (hb_buffer_t *buffer, /** * hb_buffer_add_utf8: - * @buffer: an #hb_buffer_t. - * @text: (array length=text_length) (element-type uint8_t): an array of UTF-8 + * @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 + * @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(). @@ -1621,12 +1599,12 @@ 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. - * @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). + * @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(). * @@ -1647,12 +1625,12 @@ 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. - * @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). + * @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(). * @@ -1673,13 +1651,13 @@ hb_buffer_add_utf32 (hb_buffer_t *buffer, /** * hb_buffer_add_latin1: - * @buffer: an #hb_buffer_t. + * @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. + * 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). + * 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. @@ -1735,10 +1713,10 @@ hb_buffer_add_codepoints (hb_buffer_t *buffer, /** * hb_buffer_append: - * @buffer: an #hb_buffer_t. - * @source: source #hb_buffer_t. + * @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. + * @end: end index into source buffer to copy. Use @HB_FEATURE_GLOBAL_END to copy to end of buffer. * * Append (part of) contents of another buffer to this buffer. * @@ -1763,11 +1741,6 @@ hb_buffer_append (hb_buffer_t *buffer, 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; @@ -1779,6 +1752,11 @@ hb_buffer_append (hb_buffer_t *buffer, if (unlikely (!buffer->successful)) return; + if (!orig_len) + buffer->content_type = source->content_type; + if (!buffer->have_positions && source->have_positions) + buffer->clear_positions (); + 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])); @@ -1842,7 +1820,7 @@ normalize_glyphs_cluster (hb_buffer_t *buffer, /** * hb_buffer_normalize_glyphs: - * @buffer: an #hb_buffer_t. + * @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. @@ -1855,23 +1833,13 @@ void hb_buffer_normalize_glyphs (hb_buffer_t *buffer) { assert (buffer->have_positions); - 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); + buffer->assert_glyphs (); - unsigned int count = buffer->len; - if (unlikely (!count)) return; - hb_glyph_info_t *info = buffer->info; + bool backward = HB_DIRECTION_IS_BACKWARD (buffer->props.direction); - 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); + foreach_cluster (buffer, start, end) + normalize_glyphs_cluster (buffer, start, end, backward); } void @@ -1907,8 +1875,8 @@ hb_buffer_t::sort (unsigned int start, unsigned int end, int(*compar)(const hb_g * @dottedcircle_glyph: glyph id of U+25CC DOTTED CIRCLE, or (hb_codepont_t) -1. * @position_fuzz: allowed absolute difference in position values. * - * 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 + * 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 @@ -1998,12 +1966,12 @@ hb_buffer_diff (hb_buffer_t *buffer, #ifndef HB_NO_BUFFER_MESSAGE /** * hb_buffer_set_message_func: - * @buffer: an #hb_buffer_t. - * @func: (closure user_data) (destroy destroy) (scope notified): - * @user_data: - * @destroy: - * + * @buffer: An #hb_buffer_t + * @func: (closure user_data) (destroy destroy) (scope notified): Callback function + * @user_data: (nullable): Data to pass to @func + * @destroy: (nullable): The function to call when @user_data is not needed anymore * + * Sets the implementation function for #hb_buffer_message_func_t. * * Since: 1.1.3 **/ |