Matthias Clasen
2 years ago
committed by
Behdad Esfahbod
parent
b8193357c1
commit
f89fa6dcfe
4 changed files with 592 additions and 558 deletions
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/*
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* Copyright © 2011,2012 Google, Inc. |
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* |
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* This is part of HarfBuzz, a text shaping library. |
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* |
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* Permission is hereby granted, without written agreement and without |
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* license or royalty fees, to use, copy, modify, and distribute this |
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* software and its documentation for any purpose, provided that the |
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* above copyright notice and the following two paragraphs appear in |
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* all copies of this software. |
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* |
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR |
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES |
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN |
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH |
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* DAMAGE. |
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* |
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, |
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO |
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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* |
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* Google Author(s): Behdad Esfahbod |
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*/ |
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#ifndef OT_NAME_NAME_HH |
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#define OT_NAME_NAME_HH |
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#include "../../hb-open-type.hh" |
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#include "../../hb-ot-name-language.hh" |
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#include "../../hb-aat-layout.hh" |
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#include "../../hb-utf.hh" |
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namespace OT { |
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template <typename in_utf_t, typename out_utf_t> |
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inline unsigned int |
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hb_ot_name_convert_utf (hb_bytes_t bytes, |
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unsigned int *text_size /* IN/OUT */, |
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typename out_utf_t::codepoint_t *text /* OUT */) |
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{ |
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unsigned int src_len = bytes.length / sizeof (typename in_utf_t::codepoint_t); |
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const typename in_utf_t::codepoint_t *src = (const typename in_utf_t::codepoint_t *) bytes.arrayZ; |
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const typename in_utf_t::codepoint_t *src_end = src + src_len; |
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typename out_utf_t::codepoint_t *dst = text; |
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hb_codepoint_t unicode; |
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const hb_codepoint_t replacement = HB_BUFFER_REPLACEMENT_CODEPOINT_DEFAULT; |
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if (text_size && *text_size) |
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{ |
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(*text_size)--; /* Save room for NUL-termination. */ |
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const typename out_utf_t::codepoint_t *dst_end = text + *text_size; |
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while (src < src_end && dst < dst_end) |
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{ |
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const typename in_utf_t::codepoint_t *src_next = in_utf_t::next (src, src_end, &unicode, replacement); |
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typename out_utf_t::codepoint_t *dst_next = out_utf_t::encode (dst, dst_end, unicode); |
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if (dst_next == dst) |
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break; /* Out-of-room. */ |
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dst = dst_next; |
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src = src_next; |
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} |
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*text_size = dst - text; |
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*dst = 0; /* NUL-terminate. */ |
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} |
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/* Accumulate length of rest. */ |
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unsigned int dst_len = dst - text; |
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while (src < src_end) |
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{ |
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src = in_utf_t::next (src, src_end, &unicode, replacement); |
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dst_len += out_utf_t::encode_len (unicode); |
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} |
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return dst_len; |
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} |
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#define entry_score var.u16[0] |
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#define entry_index var.u16[1] |
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/*
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* name -- Naming |
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* https://docs.microsoft.com/en-us/typography/opentype/spec/name
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*/ |
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#define HB_OT_TAG_name HB_TAG('n','a','m','e') |
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#define UNSUPPORTED 42 |
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struct NameRecord |
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{ |
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hb_language_t language (hb_face_t *face) const |
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{ |
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#ifndef HB_NO_OT_NAME_LANGUAGE |
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unsigned int p = platformID; |
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unsigned int l = languageID; |
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if (p == 3) |
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return _hb_ot_name_language_for_ms_code (l); |
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if (p == 1) |
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return _hb_ot_name_language_for_mac_code (l); |
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#ifndef HB_NO_OT_NAME_LANGUAGE_AAT |
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if (p == 0) |
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return face->table.ltag->get_language (l); |
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#endif |
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#endif |
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return HB_LANGUAGE_INVALID; |
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} |
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uint16_t score () const |
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{ |
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/* Same order as in cmap::find_best_subtable(). */ |
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unsigned int p = platformID; |
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unsigned int e = encodingID; |
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/* 32-bit. */ |
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if (p == 3 && e == 10) return 0; |
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if (p == 0 && e == 6) return 1; |
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if (p == 0 && e == 4) return 2; |
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/* 16-bit. */ |
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if (p == 3 && e == 1) return 3; |
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if (p == 0 && e == 3) return 4; |
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if (p == 0 && e == 2) return 5; |
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if (p == 0 && e == 1) return 6; |
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if (p == 0 && e == 0) return 7; |
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/* Symbol. */ |
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if (p == 3 && e == 0) return 8; |
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/* We treat all Mac Latin names as ASCII only. */ |
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if (p == 1 && e == 0) return 10; /* 10 is magic number :| */ |
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return UNSUPPORTED; |
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} |
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NameRecord* copy (hb_serialize_context_t *c, const void *base |
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#ifdef HB_EXPERIMENTAL_API |
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, const hb_hashmap_t<hb_ot_name_record_ids_t, hb_bytes_t> *name_table_overrides |
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#endif |
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) const |
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{ |
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TRACE_SERIALIZE (this); |
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HB_UNUSED auto snap = c->snapshot (); |
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auto *out = c->embed (this); |
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if (unlikely (!out)) return_trace (nullptr); |
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#ifdef HB_EXPERIMENTAL_API |
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hb_ot_name_record_ids_t record_ids (platformID, encodingID, languageID, nameID); |
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hb_bytes_t* name_bytes; |
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if (name_table_overrides->has (record_ids, &name_bytes)) { |
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hb_bytes_t encoded_bytes = *name_bytes; |
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char *name_str_utf16_be = nullptr; |
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if (platformID != 1) |
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{ |
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unsigned text_size = hb_ot_name_convert_utf<hb_utf8_t, hb_utf16_be_t> (*name_bytes, nullptr, nullptr); |
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text_size++; // needs to consider NULL terminator for use in hb_ot_name_convert_utf()
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unsigned byte_len = text_size * hb_utf16_be_t::codepoint_t::static_size; |
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name_str_utf16_be = (char *) hb_calloc (byte_len, 1); |
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if (!name_str_utf16_be) |
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{ |
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c->revert (snap); |
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return_trace (nullptr); |
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} |
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hb_ot_name_convert_utf<hb_utf8_t, hb_utf16_be_t> (*name_bytes, &text_size, |
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(hb_utf16_be_t::codepoint_t *) name_str_utf16_be); |
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unsigned encoded_byte_len = text_size * hb_utf16_be_t::codepoint_t::static_size; |
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if (!encoded_byte_len || !c->check_assign (out->length, encoded_byte_len, HB_SERIALIZE_ERROR_INT_OVERFLOW)) { |
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c->revert (snap); |
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hb_free (name_str_utf16_be); |
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return_trace (nullptr); |
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} |
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encoded_bytes = hb_bytes_t (name_str_utf16_be, encoded_byte_len); |
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} |
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else |
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{ |
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// mac platform, copy the UTF-8 string(all ascii characters) as is
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if (!c->check_assign (out->length, encoded_bytes.length, HB_SERIALIZE_ERROR_INT_OVERFLOW)) { |
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c->revert (snap); |
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return_trace (nullptr); |
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} |
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} |
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out->offset = 0; |
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c->push (); |
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encoded_bytes.copy (c); |
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c->add_link (out->offset, c->pop_pack (), hb_serialize_context_t::Tail, 0); |
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hb_free (name_str_utf16_be); |
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} |
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else |
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#endif |
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{ |
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out->offset.serialize_copy (c, offset, base, 0, hb_serialize_context_t::Tail, length); |
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} |
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return_trace (out); |
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} |
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bool isUnicode () const |
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{ |
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unsigned int p = platformID; |
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unsigned int e = encodingID; |
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return (p == 0 || |
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(p == 3 && (e == 0 || e == 1 || e == 10))); |
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} |
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static int cmp (const void *pa, const void *pb) |
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{ |
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const NameRecord *a = (const NameRecord *)pa; |
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const NameRecord *b = (const NameRecord *)pb; |
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if (a->platformID != b->platformID) |
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return a->platformID - b->platformID; |
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if (a->encodingID != b->encodingID) |
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return a->encodingID - b->encodingID; |
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if (a->languageID != b->languageID) |
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return a->languageID - b->languageID; |
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if (a->nameID != b->nameID) |
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return a->nameID - b->nameID; |
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if (a->length != b->length) |
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return a->length - b->length; |
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return 0; |
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} |
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bool sanitize (hb_sanitize_context_t *c, const void *base) const |
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{ |
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TRACE_SANITIZE (this); |
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return_trace (c->check_struct (this) && offset.sanitize (c, base, length)); |
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} |
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HBUINT16 platformID; /* Platform ID. */ |
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HBUINT16 encodingID; /* Platform-specific encoding ID. */ |
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HBUINT16 languageID; /* Language ID. */ |
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HBUINT16 nameID; /* Name ID. */ |
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HBUINT16 length; /* String length (in bytes). */ |
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NNOffset16To<UnsizedArrayOf<HBUINT8>> |
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offset; /* String offset from start of storage area (in bytes). */ |
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public: |
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DEFINE_SIZE_STATIC (12); |
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}; |
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static int |
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_hb_ot_name_entry_cmp_key (const void *pa, const void *pb, bool exact) |
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{ |
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const hb_ot_name_entry_t *a = (const hb_ot_name_entry_t *) pa; |
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const hb_ot_name_entry_t *b = (const hb_ot_name_entry_t *) pb; |
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/* Compare by name_id, then language. */ |
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if (a->name_id != b->name_id) |
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return a->name_id - b->name_id; |
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if (a->language == b->language) return 0; |
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if (!a->language) return -1; |
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if (!b->language) return +1; |
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const char *astr = hb_language_to_string (a->language); |
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const char *bstr = hb_language_to_string (b->language); |
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signed c = strcmp (astr, bstr); |
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// 'a' is the user request, and 'b' is string in the font.
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// If eg. user asks for "en-us" and font has "en", approve.
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if (!exact && c && |
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hb_language_matches (b->language, a->language)) |
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return 0; |
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return c; |
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} |
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static int |
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_hb_ot_name_entry_cmp (const void *pa, const void *pb) |
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{ |
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/* Compare by name_id, then language, then score, then index. */ |
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int v = _hb_ot_name_entry_cmp_key (pa, pb, true); |
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if (v) |
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return v; |
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const hb_ot_name_entry_t *a = (const hb_ot_name_entry_t *) pa; |
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const hb_ot_name_entry_t *b = (const hb_ot_name_entry_t *) pb; |
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if (a->entry_score != b->entry_score) |
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return a->entry_score - b->entry_score; |
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if (a->entry_index != b->entry_index) |
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return a->entry_index - b->entry_index; |
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return 0; |
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} |
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struct name |
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{ |
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static constexpr hb_tag_t tableTag = HB_OT_TAG_name; |
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unsigned int get_size () const |
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{ return min_size + count * nameRecordZ.item_size; } |
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template <typename Iterator, |
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hb_requires (hb_is_source_of (Iterator, const NameRecord &))> |
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bool serialize (hb_serialize_context_t *c, |
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Iterator it, |
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const void *src_string_pool |
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#ifdef HB_EXPERIMENTAL_API |
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, const hb_vector_t<hb_ot_name_record_ids_t>& insert_name_records |
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, const hb_hashmap_t<hb_ot_name_record_ids_t, hb_bytes_t> *name_table_overrides |
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#endif |
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) |
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{ |
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TRACE_SERIALIZE (this); |
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if (unlikely (!c->extend_min ((*this)))) return_trace (false); |
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unsigned total_count = it.len () |
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#ifdef HB_EXPERIMENTAL_API |
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+ insert_name_records.length |
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#endif |
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; |
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this->format = 0; |
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if (!c->check_assign (this->count, total_count, HB_SERIALIZE_ERROR_INT_OVERFLOW)) |
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return false; |
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NameRecord *name_records = (NameRecord *) hb_calloc (total_count, NameRecord::static_size); |
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if (unlikely (!name_records)) return_trace (false); |
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hb_array_t<NameRecord> records (name_records, total_count); |
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for (const NameRecord& record : it) |
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{ |
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hb_memcpy (name_records, &record, NameRecord::static_size); |
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name_records++; |
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} |
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#ifdef HB_EXPERIMENTAL_API |
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for (unsigned i = 0; i < insert_name_records.length; i++) |
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{ |
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const hb_ot_name_record_ids_t& ids = insert_name_records[i]; |
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NameRecord record; |
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record.platformID = ids.platform_id; |
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record.encodingID = ids.encoding_id; |
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record.languageID = ids.language_id; |
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record.nameID = ids.name_id; |
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record.length = 0; // handled in NameRecord copy()
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record.offset = 0; |
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memcpy (name_records, &record, NameRecord::static_size); |
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name_records++; |
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} |
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#endif |
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records.qsort (); |
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c->copy_all (records, |
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src_string_pool |
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#ifdef HB_EXPERIMENTAL_API |
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, name_table_overrides |
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#endif |
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); |
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hb_free (records.arrayZ); |
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if (unlikely (c->ran_out_of_room ())) return_trace (false); |
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this->stringOffset = c->length (); |
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return_trace (true); |
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} |
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bool subset (hb_subset_context_t *c) const |
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{ |
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TRACE_SUBSET (this); |
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name *name_prime = c->serializer->start_embed<name> (); |
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if (unlikely (!name_prime)) return_trace (false); |
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#ifdef HB_EXPERIMENTAL_API |
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const hb_hashmap_t<hb_ot_name_record_ids_t, hb_bytes_t> *name_table_overrides = |
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&c->plan->name_table_overrides; |
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#endif |
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auto it = |
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+ nameRecordZ.as_array (count) |
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| hb_filter (c->plan->name_ids, &NameRecord::nameID) |
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| hb_filter (c->plan->name_languages, &NameRecord::languageID) |
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| hb_filter ([&] (const NameRecord& namerecord) { |
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return |
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(c->plan->flags & HB_SUBSET_FLAGS_NAME_LEGACY) |
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|| namerecord.isUnicode (); |
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}) |
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#ifdef HB_EXPERIMENTAL_API |
||||||
|
| hb_filter ([&] (const NameRecord& namerecord) { |
||||||
|
if (name_table_overrides->is_empty ()) |
||||||
|
return true; |
||||||
|
hb_ot_name_record_ids_t rec_ids (namerecord.platformID, |
||||||
|
namerecord.encodingID, |
||||||
|
namerecord.languageID, |
||||||
|
namerecord.nameID); |
||||||
|
|
||||||
|
hb_bytes_t *p; |
||||||
|
if (name_table_overrides->has (rec_ids, &p) && |
||||||
|
(*p).length == 0) |
||||||
|
return false; |
||||||
|
return true; |
||||||
|
}) |
||||||
|
#endif |
||||||
|
; |
||||||
|
|
||||||
|
#ifdef HB_EXPERIMENTAL_API |
||||||
|
hb_hashmap_t<hb_ot_name_record_ids_t, unsigned> retained_name_record_ids; |
||||||
|
for (const NameRecord& rec : it) |
||||||
|
{ |
||||||
|
hb_ot_name_record_ids_t rec_ids (rec.platformID, |
||||||
|
rec.encodingID, |
||||||
|
rec.languageID, |
||||||
|
rec.nameID); |
||||||
|
retained_name_record_ids.set (rec_ids, 1); |
||||||
|
} |
||||||
|
|
||||||
|
hb_vector_t<hb_ot_name_record_ids_t> insert_name_records; |
||||||
|
if (!name_table_overrides->is_empty ()) |
||||||
|
{ |
||||||
|
if (unlikely (!insert_name_records.alloc (name_table_overrides->get_population (), true))) |
||||||
|
return_trace (false); |
||||||
|
for (const auto& record_ids : name_table_overrides->keys ()) |
||||||
|
{ |
||||||
|
if (name_table_overrides->get (record_ids).length == 0) |
||||||
|
continue; |
||||||
|
if (retained_name_record_ids.has (record_ids)) |
||||||
|
continue; |
||||||
|
insert_name_records.push (record_ids); |
||||||
|
} |
||||||
|
} |
||||||
|
#endif |
||||||
|
|
||||||
|
return (name_prime->serialize (c->serializer, it, |
||||||
|
std::addressof (this + stringOffset) |
||||||
|
#ifdef HB_EXPERIMENTAL_API |
||||||
|
, insert_name_records |
||||||
|
, name_table_overrides |
||||||
|
#endif |
||||||
|
)); |
||||||
|
} |
||||||
|
|
||||||
|
bool sanitize_records (hb_sanitize_context_t *c) const |
||||||
|
{ |
||||||
|
TRACE_SANITIZE (this); |
||||||
|
const void *string_pool = (this+stringOffset).arrayZ; |
||||||
|
return_trace (nameRecordZ.sanitize (c, count, string_pool)); |
||||||
|
} |
||||||
|
|
||||||
|
bool sanitize (hb_sanitize_context_t *c) const |
||||||
|
{ |
||||||
|
TRACE_SANITIZE (this); |
||||||
|
return_trace (c->check_struct (this) && |
||||||
|
likely (format == 0 || format == 1) && |
||||||
|
c->check_array (nameRecordZ.arrayZ, count) && |
||||||
|
c->check_range (this, stringOffset) && |
||||||
|
sanitize_records (c)); |
||||||
|
} |
||||||
|
|
||||||
|
struct accelerator_t |
||||||
|
{ |
||||||
|
accelerator_t (hb_face_t *face) |
||||||
|
{ |
||||||
|
this->table = hb_sanitize_context_t ().reference_table<name> (face); |
||||||
|
assert (this->table.get_length () >= this->table->stringOffset); |
||||||
|
this->pool = (const char *) (const void *) (this->table+this->table->stringOffset); |
||||||
|
this->pool_len = this->table.get_length () - this->table->stringOffset; |
||||||
|
const hb_array_t<const NameRecord> all_names (this->table->nameRecordZ.arrayZ, |
||||||
|
this->table->count); |
||||||
|
|
||||||
|
this->names.alloc (all_names.length, true); |
||||||
|
|
||||||
|
for (unsigned int i = 0; i < all_names.length; i++) |
||||||
|
{ |
||||||
|
hb_ot_name_entry_t *entry = this->names.push (); |
||||||
|
|
||||||
|
entry->name_id = all_names[i].nameID; |
||||||
|
entry->language = all_names[i].language (face); |
||||||
|
entry->entry_score = all_names[i].score (); |
||||||
|
entry->entry_index = i; |
||||||
|
} |
||||||
|
|
||||||
|
this->names.qsort (_hb_ot_name_entry_cmp); |
||||||
|
/* Walk and pick best only for each name_id,language pair,
|
||||||
|
* while dropping unsupported encodings. */ |
||||||
|
unsigned int j = 0; |
||||||
|
for (unsigned int i = 0; i < this->names.length; i++) |
||||||
|
{ |
||||||
|
if (this->names[i].entry_score == UNSUPPORTED || |
||||||
|
this->names[i].language == HB_LANGUAGE_INVALID) |
||||||
|
continue; |
||||||
|
if (i && |
||||||
|
this->names[i - 1].name_id == this->names[i].name_id && |
||||||
|
this->names[i - 1].language == this->names[i].language) |
||||||
|
continue; |
||||||
|
this->names[j++] = this->names[i]; |
||||||
|
} |
||||||
|
this->names.resize (j); |
||||||
|
} |
||||||
|
~accelerator_t () |
||||||
|
{ |
||||||
|
this->table.destroy (); |
||||||
|
} |
||||||
|
|
||||||
|
int get_index (hb_ot_name_id_t name_id, |
||||||
|
hb_language_t language, |
||||||
|
unsigned int *width=nullptr) const |
||||||
|
{ |
||||||
|
const hb_ot_name_entry_t key = {name_id, {0}, language}; |
||||||
|
const hb_ot_name_entry_t *entry = hb_bsearch (key, (const hb_ot_name_entry_t *) this->names, |
||||||
|
this->names.length, |
||||||
|
sizeof (hb_ot_name_entry_t), |
||||||
|
_hb_ot_name_entry_cmp_key, |
||||||
|
true); |
||||||
|
|
||||||
|
if (!entry) |
||||||
|
{ |
||||||
|
entry = hb_bsearch (key, (const hb_ot_name_entry_t *) this->names, |
||||||
|
this->names.length, |
||||||
|
sizeof (hb_ot_name_entry_t), |
||||||
|
_hb_ot_name_entry_cmp_key, |
||||||
|
false); |
||||||
|
} |
||||||
|
|
||||||
|
if (!entry) |
||||||
|
return -1; |
||||||
|
|
||||||
|
if (width) |
||||||
|
*width = entry->entry_score < 10 ? 2 : 1; |
||||||
|
|
||||||
|
return entry->entry_index; |
||||||
|
} |
||||||
|
|
||||||
|
hb_bytes_t get_name (unsigned int idx) const |
||||||
|
{ |
||||||
|
const hb_array_t<const NameRecord> all_names (table->nameRecordZ.arrayZ, table->count); |
||||||
|
const NameRecord &record = all_names[idx]; |
||||||
|
const hb_bytes_t string_pool (pool, pool_len); |
||||||
|
return string_pool.sub_array (record.offset, record.length); |
||||||
|
} |
||||||
|
|
||||||
|
private: |
||||||
|
const char *pool; |
||||||
|
unsigned int pool_len; |
||||||
|
public: |
||||||
|
hb_blob_ptr_t<name> table; |
||||||
|
hb_vector_t<hb_ot_name_entry_t> names; |
||||||
|
}; |
||||||
|
|
||||||
|
public: |
||||||
|
/* We only implement format 0 for now. */ |
||||||
|
HBUINT16 format; /* Format selector (=0/1). */ |
||||||
|
HBUINT16 count; /* Number of name records. */ |
||||||
|
NNOffset16To<UnsizedArrayOf<HBUINT8>> |
||||||
|
stringOffset; /* Offset to start of string storage (from start of table). */ |
||||||
|
UnsizedArrayOf<NameRecord> |
||||||
|
nameRecordZ; /* The name records where count is the number of records. */ |
||||||
|
public: |
||||||
|
DEFINE_SIZE_ARRAY (6, nameRecordZ); |
||||||
|
}; |
||||||
|
|
||||||
|
#undef entry_index |
||||||
|
#undef entry_score |
||||||
|
|
||||||
|
struct name_accelerator_t : name::accelerator_t { |
||||||
|
name_accelerator_t (hb_face_t *face) : name::accelerator_t (face) {} |
||||||
|
}; |
||||||
|
|
||||||
|
} /* namespace OT */ |
||||||
|
|
||||||
|
|
||||||
|
#endif /* OT_NAME_NAME_HH */ |
||||||
Loading…
Reference in new issue