diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-subset-input.cc')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-subset-input.cc | 141 |
1 files changed, 130 insertions, 11 deletions
diff --git a/thirdparty/harfbuzz/src/hb-subset-input.cc b/thirdparty/harfbuzz/src/hb-subset-input.cc index fd250104bb..42434ae0ef 100644 --- a/thirdparty/harfbuzz/src/hb-subset-input.cc +++ b/thirdparty/harfbuzz/src/hb-subset-input.cc @@ -26,7 +26,7 @@ #include "hb-subset.hh" #include "hb-set.hh" - +#include "hb-utf.hh" /** * hb_subset_input_create_or_fail: * @@ -49,8 +49,15 @@ hb_subset_input_create_or_fail (void) set = hb_set_create (); input->axes_location = hb_hashmap_create<hb_tag_t, float> (); +#ifdef HB_EXPERIMENTAL_API + input->name_table_overrides = hb_hashmap_create<hb_ot_name_record_ids_t, hb_bytes_t> (); +#endif - if (!input->axes_location || input->in_error ()) + if (!input->axes_location || +#ifdef HB_EXPERIMENTAL_API + !input->name_table_overrides || +#endif + input->in_error ()) { hb_subset_input_destroy (input); return nullptr; @@ -248,6 +255,15 @@ hb_subset_input_destroy (hb_subset_input_t *input) hb_hashmap_destroy (input->axes_location); +#ifdef HB_EXPERIMENTAL_API + if (input->name_table_overrides) + { + for (auto _ : *input->name_table_overrides) + _.second.fini (); + } + hb_hashmap_destroy (input->name_table_overrides); +#endif + hb_free (input); } @@ -379,7 +395,6 @@ hb_subset_input_get_user_data (const hb_subset_input_t *input, return hb_object_get_user_data (input, key); } -#ifdef HB_EXPERIMENTAL_API #ifndef HB_NO_VAR /** * hb_subset_input_pin_axis_to_default: (skip) @@ -388,9 +403,12 @@ hb_subset_input_get_user_data (const hb_subset_input_t *input, * * Pin an axis to its default location in the given subset input object. * + * Currently only works for fonts with 'glyf' tables. CFF and CFF2 is not + * yet supported. Additionally all axes in a font must be pinned. + * * Return value: `true` if success, `false` otherwise * - * Since: EXPERIMENTAL + * Since: 6.0.0 **/ HB_EXTERN hb_bool_t hb_subset_input_pin_axis_to_default (hb_subset_input_t *input, @@ -412,9 +430,12 @@ hb_subset_input_pin_axis_to_default (hb_subset_input_t *input, * * Pin an axis to a fixed location in the given subset input object. * + * Currently only works for fonts with 'glyf' tables. CFF and CFF2 is not + * yet supported. Additionally all axes in a font must be pinned. + * * Return value: `true` if success, `false` otherwise * - * Since: EXPERIMENTAL + * Since: 6.0.0 **/ HB_EXTERN hb_bool_t hb_subset_input_pin_axis_location (hb_subset_input_t *input, @@ -430,28 +451,41 @@ hb_subset_input_pin_axis_location (hb_subset_input_t *input, return input->axes_location->set (axis_tag, val); } #endif -#endif -#ifdef HB_EXPERIMENTAL_API /** - * hb_subset_preprocess - * @input: a #hb_face_t object. + * hb_subset_preprocess: + * @source: a #hb_face_t object. * * Preprocesses the face and attaches data that will be needed by the * subsetter. Future subsetting operations can then use the precomputed data * to speed up the subsetting operation. * - * Since: EXPERIMENTAL + * See [subset-preprocessing](https://github.com/harfbuzz/harfbuzz/blob/main/docs/subset-preprocessing.md) + * for more information. + * + * Note: the preprocessed face may contain sub-blobs that reference the memory + * backing the source #hb_face_t. Therefore in the case that this memory is not + * owned by the source face you will need to ensure that memory lives + * as long as the returned #hb_face_t. + * + * Returns: a new #hb_face_t. + * + * Since: 6.0.0 **/ HB_EXTERN hb_face_t * hb_subset_preprocess (hb_face_t *source) { hb_subset_input_t* input = hb_subset_input_create_or_fail (); + if (!input) + return source; hb_set_clear (hb_subset_input_set(input, HB_SUBSET_SETS_UNICODE)); hb_set_invert (hb_subset_input_set(input, HB_SUBSET_SETS_UNICODE)); + hb_set_clear (hb_subset_input_set(input, HB_SUBSET_SETS_GLYPH_INDEX)); + hb_set_invert (hb_subset_input_set(input, HB_SUBSET_SETS_GLYPH_INDEX)); + hb_set_clear (hb_subset_input_set(input, HB_SUBSET_SETS_LAYOUT_FEATURE_TAG)); hb_set_invert (hb_subset_input_set(input, @@ -467,15 +501,100 @@ hb_subset_preprocess (hb_face_t *source) hb_set_invert (hb_subset_input_set(input, HB_SUBSET_SETS_NAME_ID)); + hb_set_clear (hb_subset_input_set(input, + HB_SUBSET_SETS_NAME_LANG_ID)); + hb_set_invert (hb_subset_input_set(input, + HB_SUBSET_SETS_NAME_LANG_ID)); + hb_subset_input_set_flags(input, HB_SUBSET_FLAGS_NOTDEF_OUTLINE | HB_SUBSET_FLAGS_GLYPH_NAMES | - HB_SUBSET_FLAGS_RETAIN_GIDS); + HB_SUBSET_FLAGS_RETAIN_GIDS | + HB_SUBSET_FLAGS_NO_PRUNE_UNICODE_RANGES); input->attach_accelerator_data = true; + // Always use long loca in the preprocessed version. This allows + // us to store the glyph bytes unpadded which allows the future subset + // operation to run faster by skipping the trim padding step. + input->force_long_loca = true; + hb_face_t* new_source = hb_subset_or_fail (source, input); hb_subset_input_destroy (input); + if (!new_source) { + DEBUG_MSG (SUBSET, nullptr, "Preprocessing failed due to subset failure."); + return source; + } + return new_source; } + +#ifdef HB_EXPERIMENTAL_API +/** + * hb_subset_input_override_name_table: + * @input: a #hb_subset_input_t object. + * @name_id: name_id of a nameRecord + * @platform_id: platform ID of a nameRecord + * @encoding_id: encoding ID of a nameRecord + * @language_id: language ID of a nameRecord + * @name_str: pointer to name string new value or null to indicate should remove + * @str_len: the size of @name_str, or -1 if it is `NULL`-terminated + * + * Override the name string of the NameRecord identified by name_id, + * platform_id, encoding_id and language_id. If a record with that name_id + * doesn't exist, create it and insert to the name table. + * + * Note: for mac platform, we only support name_str with all ascii characters, + * name_str with non-ascii characters will be ignored. + * + * Since: EXPERIMENTAL + **/ +HB_EXTERN hb_bool_t +hb_subset_input_override_name_table (hb_subset_input_t *input, + hb_ot_name_id_t name_id, + unsigned platform_id, + unsigned encoding_id, + unsigned language_id, + const char *name_str, + int str_len /* -1 means nul-terminated */) +{ + if (!name_str) + { + str_len = 0; + } + else if (str_len == -1) + { + str_len = strlen (name_str); + } + + hb_bytes_t name_bytes (nullptr, 0); + if (str_len) + { + if (platform_id == 1) + { + const uint8_t *src = reinterpret_cast<const uint8_t*> (name_str); + const uint8_t *src_end = src + str_len; + + hb_codepoint_t unicode; + const hb_codepoint_t replacement = HB_BUFFER_REPLACEMENT_CODEPOINT_DEFAULT; + while (src < src_end) + { + src = hb_utf8_t::next (src, src_end, &unicode, replacement); + if (unicode >= 0x0080u) + { + printf ("Non-ascii character detected, ignored...This API supports acsii characters only for mac platform\n"); + return false; + } + } + } + char *override_name = (char *) hb_malloc (str_len); + if (unlikely (!override_name)) return false; + + hb_memcpy (override_name, name_str, str_len); + name_bytes = hb_bytes_t (override_name, str_len); + } + input->name_table_overrides->set (hb_ot_name_record_ids_t (platform_id, encoding_id, language_id, name_id), name_bytes); + return true; +} + #endif |