diff options
Diffstat (limited to 'Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset.cc')
-rw-r--r-- | Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset.cc | 259 |
1 files changed, 79 insertions, 180 deletions
diff --git a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset.cc b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset.cc index 411c6b861c7..b714f291a88 100644 --- a/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset.cc +++ b/Build/source/libs/harfbuzz/harfbuzz-src/src/hb-subset.cc @@ -24,14 +24,13 @@ * Google Author(s): Garret Rieger, Rod Sheeter, Behdad Esfahbod */ -#include "hb-private.hh" -#include "hb-open-type-private.hh" +#include "hb.hh" +#include "hb-open-type.hh" +#include "hb-subset.hh" #include "hb-subset-glyf.hh" -#include "hb-subset-private.hh" -#include "hb-subset-plan.hh" -#include "hb-open-file-private.hh" +#include "hb-open-file.hh" #include "hb-ot-cmap-table.hh" #include "hb-ot-glyf-table.hh" #include "hb-ot-hdmx-table.hh" @@ -41,42 +40,26 @@ #include "hb-ot-maxp-table.hh" #include "hb-ot-os2-table.hh" #include "hb-ot-post-table.hh" +#include "hb-ot-layout-gsub-table.hh" +#include "hb-ot-layout-gpos-table.hh" -struct hb_subset_profile_t { - hb_object_header_t header; - ASSERT_POD (); -}; - -/** - * hb_subset_profile_create: - * - * Return value: New profile with default settings. - * - * Since: 1.8.0 - **/ -hb_subset_profile_t * -hb_subset_profile_create () +static unsigned int +_plan_estimate_subset_table_size (hb_subset_plan_t *plan, + unsigned int table_len) { - return hb_object_create<hb_subset_profile_t>(); -} + unsigned int src_glyphs = plan->source->get_num_glyphs (); + unsigned int dst_glyphs = plan->glyphset->get_population (); -/** - * hb_subset_profile_destroy: - * - * Since: 1.8.0 - **/ -void -hb_subset_profile_destroy (hb_subset_profile_t *profile) -{ - if (!hb_object_destroy (profile)) return; + if (unlikely (!src_glyphs)) + return 512 + table_len; - free (profile); + return 512 + (unsigned int) (table_len * sqrt ((double) dst_glyphs / src_glyphs)); } template<typename TableType> static bool -_subset (hb_subset_plan_t *plan) +_subset2 (hb_subset_plan_t *plan) { hb_blob_t *source_blob = hb_sanitize_context_t ().reference_table<TableType> (plan->source); const TableType *table = source_blob->as<TableType> (); @@ -85,145 +68,69 @@ _subset (hb_subset_plan_t *plan) hb_bool_t result = false; if (source_blob->data) { - result = table->subset(plan); - } else { - DEBUG_MSG(SUBSET, nullptr, "OT::%c%c%c%c::subset sanitize failed on source table.", HB_UNTAG(tag)); + hb_auto_t<hb_vector_t<char> > buf; + unsigned int buf_size = _plan_estimate_subset_table_size (plan, source_blob->length); + DEBUG_MSG(SUBSET, nullptr, "OT::%c%c%c%c initial estimated table size: %u bytes.", HB_UNTAG(tag), buf_size); + if (unlikely (!buf.alloc (buf_size))) + { + DEBUG_MSG(SUBSET, nullptr, "OT::%c%c%c%c failed to allocate %u bytes.", HB_UNTAG(tag), buf_size); + return false; + } + retry: + hb_serialize_context_t serializer (buf.arrayZ, buf_size); + hb_subset_context_t c (plan, &serializer); + result = table->subset (&c); + if (serializer.ran_out_of_room) + { + buf_size += (buf_size >> 1) + 32; + DEBUG_MSG(SUBSET, nullptr, "OT::%c%c%c%c ran out of room; reallocating to %u bytes.", HB_UNTAG(tag), buf_size); + if (unlikely (!buf.alloc (buf_size))) + { + DEBUG_MSG(SUBSET, nullptr, "OT::%c%c%c%c failed to reallocate %u bytes.", HB_UNTAG(tag), buf_size); + return false; + } + goto retry; + } + if (result) + { + hb_blob_t *dest_blob = serializer.copy_blob (); + DEBUG_MSG(SUBSET, nullptr, "OT::%c%c%c%c final subset table size: %u bytes.", HB_UNTAG(tag), dest_blob->length); + result = c.plan->add_table (tag, dest_blob); + hb_blob_destroy (dest_blob); + } + else + { + DEBUG_MSG(SUBSET, nullptr, "OT::%c%c%c%c::subset table subsetted to empty.", HB_UNTAG(tag)); + result = true; + } } + else + DEBUG_MSG(SUBSET, nullptr, "OT::%c%c%c%c::subset sanitize failed on source table.", HB_UNTAG(tag)); hb_blob_destroy (source_blob); DEBUG_MSG(SUBSET, nullptr, "OT::%c%c%c%c::subset %s", HB_UNTAG(tag), result ? "success" : "FAILED!"); return result; } - -/* - * A face that has add_table(). - */ - -struct hb_subset_face_data_t -{ - struct table_entry_t - { - inline int cmp (const hb_tag_t *t) const - { - if (*t < tag) return -1; - if (*t > tag) return -1; - return 0; - } - - hb_tag_t tag; - hb_blob_t *blob; - }; - - hb_vector_t<table_entry_t, 32> tables; -}; - -static hb_subset_face_data_t * -_hb_subset_face_data_create (void) -{ - hb_subset_face_data_t *data = (hb_subset_face_data_t *) calloc (1, sizeof (hb_subset_face_data_t)); - if (unlikely (!data)) - return nullptr; - - data->tables.init (); - - return data; -} - -static void -_hb_subset_face_data_destroy (void *user_data) -{ - hb_subset_face_data_t *data = (hb_subset_face_data_t *) user_data; - - for (unsigned int i = 0; i < data->tables.len; i++) - hb_blob_destroy (data->tables[i].blob); - - data->tables.fini (); - - free (data); -} - -static hb_blob_t * -_hb_subset_face_data_reference_blob (hb_subset_face_data_t *data) -{ - - unsigned int table_count = data->tables.len; - unsigned int face_length = table_count * 16 + 12; - - for (unsigned int i = 0; i < table_count; i++) - face_length += hb_ceil_to_4 (hb_blob_get_length (data->tables.arrayZ[i].blob)); - - char *buf = (char *) malloc (face_length); - if (unlikely (!buf)) - return nullptr; - - hb_serialize_context_t c (buf, face_length); - OT::OpenTypeFontFile *f = c.start_serialize<OT::OpenTypeFontFile> (); - - bool is_cff = data->tables.lsearch (HB_TAG ('C','F','F',' ')) || data->tables.lsearch (HB_TAG ('C','F','F','2')); - hb_tag_t sfnt_tag = is_cff ? OT::OpenTypeFontFile::CFFTag : OT::OpenTypeFontFile::TrueTypeTag; - - Supplier<hb_tag_t> tags_supplier (&data->tables[0].tag, table_count, sizeof (data->tables[0])); - Supplier<hb_blob_t *> blobs_supplier (&data->tables[0].blob, table_count, sizeof (data->tables[0])); - bool ret = f->serialize_single (&c, - sfnt_tag, - tags_supplier, - blobs_supplier, - table_count); - - c.end_serialize (); - - if (unlikely (!ret)) - { - free (buf); - return nullptr; - } - - return hb_blob_create (buf, face_length, HB_MEMORY_MODE_WRITABLE, buf, free); -} - -static hb_blob_t * -_hb_subset_face_reference_table (hb_face_t *face, hb_tag_t tag, void *user_data) +template<typename TableType> +static bool +_subset (hb_subset_plan_t *plan) { - hb_subset_face_data_t *data = (hb_subset_face_data_t *) user_data; - - if (!tag) - return _hb_subset_face_data_reference_blob (data); - - hb_subset_face_data_t::table_entry_t *entry = data->tables.lsearch (tag); - if (entry) - return hb_blob_reference (entry->blob); - - return nullptr; -} + hb_blob_t *source_blob = hb_sanitize_context_t ().reference_table<TableType> (plan->source); + const TableType *table = source_blob->as<TableType> (); -/* TODO: Move this to hb-face.h and rename to hb_face_builder_create() - * with hb_face_builder_add_table(). */ -hb_face_t * -hb_subset_face_create (void) -{ - hb_subset_face_data_t *data = _hb_subset_face_data_create (); - if (unlikely (!data)) return hb_face_get_empty (); + hb_tag_t tag = TableType::tableTag; + hb_bool_t result = false; + if (source_blob->data) + result = table->subset (plan); + else + DEBUG_MSG(SUBSET, nullptr, "OT::%c%c%c%c::subset sanitize failed on source table.", HB_UNTAG(tag)); - return hb_face_create_for_tables (_hb_subset_face_reference_table, - data, - _hb_subset_face_data_destroy); + hb_blob_destroy (source_blob); + DEBUG_MSG(SUBSET, nullptr, "OT::%c%c%c%c::subset %s", HB_UNTAG(tag), result ? "success" : "FAILED!"); + return result; } -hb_bool_t -hb_subset_face_add_table (hb_face_t *face, hb_tag_t tag, hb_blob_t *blob) -{ - if (unlikely (face->destroy != (hb_destroy_func_t) _hb_subset_face_data_destroy)) - return false; - - hb_subset_face_data_t *data = (hb_subset_face_data_t *) face->user_data; - hb_subset_face_data_t::table_entry_t *entry = data->tables.push (); - - entry->tag = tag; - entry->blob = hb_blob_reference (blob); - - return true; -} static bool _subset_table (hb_subset_plan_t *plan, @@ -270,6 +177,14 @@ _subset_table (hb_subset_plan_t *plan, case HB_OT_TAG_post: result = _subset<const OT::post> (plan); break; + + case HB_OT_TAG_GSUB: + //result = _subset2<const OT::GSUB> (plan); + break; + case HB_OT_TAG_GPOS: + //result = _subset2<const OT::GPOS> (plan); + break; + default: hb_blob_t *source_table = hb_face_reference_table(plan->source, tag); if (likely (source_table)) @@ -298,7 +213,7 @@ _should_drop_table(hb_subset_plan_t *plan, hb_tag_t tag) case HB_TAG ('G', 'D', 'E', 'F'): /* temporary */ case HB_TAG ('G', 'P', 'O', 'S'): /* temporary */ case HB_TAG ('G', 'S', 'U', 'B'): /* temporary */ - return plan->drop_ot_layout; + return plan->drop_layout; // Drop these tables below by default, list pulled // from fontTools: case HB_TAG ('B', 'A', 'S', 'E'): @@ -327,19 +242,17 @@ _should_drop_table(hb_subset_plan_t *plan, hb_tag_t tag) /** * hb_subset: * @source: font face data to be subset. - * @profile: profile to use for the subsetting. * @input: input to use for the subsetting. * - * Subsets a font according to provided profile and input. + * Subsets a font according to provided input. **/ hb_face_t * hb_subset (hb_face_t *source, - hb_subset_profile_t *profile, hb_subset_input_t *input) { - if (unlikely (!profile || !input || !source)) return hb_face_get_empty(); + if (unlikely (!input || !source)) return hb_face_get_empty(); - hb_subset_plan_t *plan = hb_subset_plan_create (source, profile, input); + hb_subset_plan_t *plan = hb_subset_plan_create (source, input); hb_tag_t table_tags[32]; unsigned int offset = 0, count; @@ -358,23 +271,9 @@ hb_subset (hb_face_t *source, success = success && _subset_table (plan, tag); } offset += count; - } while (count == ARRAY_LENGTH (table_tags)); + } while (success && count == ARRAY_LENGTH (table_tags)); hb_face_t *result = success ? hb_face_reference(plan->dest) : hb_face_get_empty(); hb_subset_plan_destroy (plan); return result; } - -/** - * hb_subset_get_all_codepoints: - * @source: font face data to load. - * @out: set to add the all codepoints covered by font face, source. - */ -void -hb_subset_get_all_codepoints (hb_face_t *source, hb_set_t *out) -{ - OT::cmap::accelerator_t cmap; - cmap.init (source); - cmap.get_all_codepoints (out); - cmap.fini(); -} |