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-rw-r--r--Build/source/texk/dvisvgm/dvisvgm-src/libs/woff2/src/font.cc400
1 files changed, 0 insertions, 400 deletions
diff --git a/Build/source/texk/dvisvgm/dvisvgm-src/libs/woff2/src/font.cc b/Build/source/texk/dvisvgm/dvisvgm-src/libs/woff2/src/font.cc
deleted file mode 100644
index 1361f8c5dcc..00000000000
--- a/Build/source/texk/dvisvgm/dvisvgm-src/libs/woff2/src/font.cc
+++ /dev/null
@@ -1,400 +0,0 @@
-/* Copyright 2013 Google Inc. All Rights Reserved.
-
- Distributed under MIT license.
- See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
-*/
-
-/* Font management utilities */
-
-#include "./font.h"
-
-#include <algorithm>
-
-#include "./buffer.h"
-#include "./port.h"
-#include "./store_bytes.h"
-#include "./table_tags.h"
-#include "./woff2_common.h"
-
-namespace woff2 {
-
-Font::Table* Font::FindTable(uint32_t tag) {
- std::map<uint32_t, Font::Table>::iterator it = tables.find(tag);
- return it == tables.end() ? 0 : &it->second;
-}
-
-const Font::Table* Font::FindTable(uint32_t tag) const {
- std::map<uint32_t, Font::Table>::const_iterator it = tables.find(tag);
- return it == tables.end() ? 0 : &it->second;
-}
-
-std::vector<uint32_t> Font::OutputOrderedTags() const {
- std::vector<uint32_t> output_order;
-
- for (const auto& i : tables) {
- const Font::Table& table = i.second;
- // This is a transformed table, we will write it together with the
- // original version.
- if (table.tag & 0x80808080) {
- continue;
- }
- output_order.push_back(table.tag);
- }
-
- // Alphabetize then put loca immediately after glyf
- auto glyf_loc = std::find(output_order.begin(), output_order.end(),
- kGlyfTableTag);
- auto loca_loc = std::find(output_order.begin(), output_order.end(),
- kLocaTableTag);
- if (glyf_loc != output_order.end() && loca_loc != output_order.end()) {
- output_order.erase(loca_loc);
- output_order.insert(std::find(output_order.begin(), output_order.end(),
- kGlyfTableTag) + 1, kLocaTableTag);
- }
-
- return output_order;
-}
-
-bool ReadTrueTypeFont(Buffer* file, const uint8_t* data, size_t len,
- Font* font) {
- // We don't care about the search_range, entry_selector and range_shift
- // fields, they will always be computed upon writing the font.
- if (!file->ReadU16(&font->num_tables) ||
- !file->Skip(6)) {
- return FONT_COMPRESSION_FAILURE();
- }
-
- std::map<uint32_t, uint32_t> intervals;
- for (uint16_t i = 0; i < font->num_tables; ++i) {
- Font::Table table;
- table.flag_byte = 0;
- table.reuse_of = NULL;
- if (!file->ReadU32(&table.tag) ||
- !file->ReadU32(&table.checksum) ||
- !file->ReadU32(&table.offset) ||
- !file->ReadU32(&table.length)) {
- return FONT_COMPRESSION_FAILURE();
- }
- if ((table.offset & 3) != 0 ||
- table.length > len ||
- len - table.length < table.offset) {
- return FONT_COMPRESSION_FAILURE();
- }
- intervals[table.offset] = table.length;
- table.data = data + table.offset;
- if (font->tables.find(table.tag) != font->tables.end()) {
- return FONT_COMPRESSION_FAILURE();
- }
- font->tables[table.tag] = table;
- }
-
- // Check that tables are non-overlapping.
- uint32_t last_offset = 12UL + 16UL * font->num_tables;
- for (const auto& i : intervals) {
- if (i.first < last_offset || i.first + i.second < i.first) {
- return FONT_COMPRESSION_FAILURE();
- }
- last_offset = i.first + i.second;
- }
-
- // Sanity check key tables
- const Font::Table* head_table = font->FindTable(kHeadTableTag);
- if (head_table != NULL && head_table->length < 52) {
- return FONT_COMPRESSION_FAILURE();
- }
-
- return true;
-}
-
-bool ReadCollectionFont(Buffer* file, const uint8_t* data, size_t len,
- Font* font,
- std::map<uint32_t, Font::Table*>* all_tables) {
- if (!file->ReadU32(&font->flavor)) {
- return FONT_COMPRESSION_FAILURE();
- }
- if (!ReadTrueTypeFont(file, data, len, font)) {
- return FONT_COMPRESSION_FAILURE();
- }
-
- for (auto& entry : font->tables) {
- Font::Table& table = entry.second;
-
- if (all_tables->find(table.offset) == all_tables->end()) {
- (*all_tables)[table.offset] = font->FindTable(table.tag);
- } else {
- table.reuse_of = (*all_tables)[table.offset];
- if (table.tag != table.reuse_of->tag) {
- return FONT_COMPRESSION_FAILURE();
- }
- }
-
- }
- return true;
-}
-
-bool ReadTrueTypeCollection(Buffer* file, const uint8_t* data, size_t len,
- FontCollection* font_collection) {
- uint32_t num_fonts;
-
- if (!file->ReadU32(&font_collection->header_version) ||
- !file->ReadU32(&num_fonts)) {
- return FONT_COMPRESSION_FAILURE();
- }
-
- std::vector<uint32_t> offsets;
- for (size_t i = 0; i < num_fonts; i++) {
- uint32_t offset;
- if (!file->ReadU32(&offset)) {
- return FONT_COMPRESSION_FAILURE();
- }
- offsets.push_back(offset);
- }
-
- font_collection->fonts.resize(offsets.size());
- std::vector<Font>::iterator font_it = font_collection->fonts.begin();
-
- std::map<uint32_t, Font::Table*> all_tables;
- for (const auto offset : offsets) {
- file->set_offset(offset);
- Font& font = *font_it++;
- if (!ReadCollectionFont(file, data, len, &font, &all_tables)) {
- return FONT_COMPRESSION_FAILURE();
- }
- }
-
- return true;
-}
-
-bool ReadFont(const uint8_t* data, size_t len, Font* font) {
- Buffer file(data, len);
-
- if (!file.ReadU32(&font->flavor)) {
- return FONT_COMPRESSION_FAILURE();
- }
-
- if (font->flavor == kTtcFontFlavor) {
- return FONT_COMPRESSION_FAILURE();
- }
- return ReadTrueTypeFont(&file, data, len, font);
-}
-
-bool ReadFontCollection(const uint8_t* data, size_t len,
- FontCollection* font_collection) {
- Buffer file(data, len);
-
- if (!file.ReadU32(&font_collection->flavor)) {
- return FONT_COMPRESSION_FAILURE();
- }
-
- if (font_collection->flavor != kTtcFontFlavor) {
- font_collection->fonts.resize(1);
- Font& font = font_collection->fonts[0];
- font.flavor = font_collection->flavor;
- return ReadTrueTypeFont(&file, data, len, &font);
- }
- return ReadTrueTypeCollection(&file, data, len, font_collection);
-}
-
-size_t FontFileSize(const Font& font) {
- size_t max_offset = 12ULL + 16ULL * font.num_tables;
- for (const auto& i : font.tables) {
- const Font::Table& table = i.second;
- size_t padding_size = (4 - (table.length & 3)) & 3;
- size_t end_offset = (padding_size + table.offset) + table.length;
- max_offset = std::max(max_offset, end_offset);
- }
- return max_offset;
-}
-
-size_t FontCollectionFileSize(const FontCollection& font_collection) {
- size_t max_offset = 0;
- for (auto& font : font_collection.fonts) {
- // font file size actually just finds max offset
- max_offset = std::max(max_offset, FontFileSize(font));
- }
- return max_offset;
-}
-
-bool WriteFont(const Font& font, uint8_t* dst, size_t dst_size) {
- size_t offset = 0;
- return WriteFont(font, &offset, dst, dst_size);
-}
-
-bool WriteTableRecord(const Font::Table* table, size_t* offset, uint8_t* dst,
- size_t dst_size) {
- if (dst_size < *offset + kSfntEntrySize) {
- return FONT_COMPRESSION_FAILURE();
- }
- if (table->IsReused()) {
- table = table->reuse_of;
- }
- StoreU32(table->tag, offset, dst);
- StoreU32(table->checksum, offset, dst);
- StoreU32(table->offset, offset, dst);
- StoreU32(table->length, offset, dst);
- return true;
-}
-
-bool WriteTable(const Font::Table& table, size_t* offset, uint8_t* dst,
- size_t dst_size) {
- if (!WriteTableRecord(&table, offset, dst, dst_size)) {
- return false;
- }
-
- // Write the actual table data if it's the first time we've seen it
- if (!table.IsReused()) {
- if (table.offset + table.length < table.offset ||
- dst_size < table.offset + table.length) {
- return FONT_COMPRESSION_FAILURE();
- }
- memcpy(dst + table.offset, table.data, table.length);
- size_t padding_size = (4 - (table.length & 3)) & 3;
- if (table.offset + table.length + padding_size < padding_size ||
- dst_size < table.offset + table.length + padding_size) {
- return FONT_COMPRESSION_FAILURE();
- }
- memset(dst + table.offset + table.length, 0, padding_size);
- }
- return true;
-}
-
-bool WriteFont(const Font& font, size_t* offset, uint8_t* dst,
- size_t dst_size) {
- if (dst_size < 12ULL + 16ULL * font.num_tables) {
- return FONT_COMPRESSION_FAILURE();
- }
- StoreU32(font.flavor, offset, dst);
- Store16(font.num_tables, offset, dst);
- uint16_t max_pow2 = font.num_tables ? Log2Floor(font.num_tables) : 0;
- uint16_t search_range = max_pow2 ? 1 << (max_pow2 + 4) : 0;
- uint16_t range_shift = (font.num_tables << 4) - search_range;
- Store16(search_range, offset, dst);
- Store16(max_pow2, offset, dst);
- Store16(range_shift, offset, dst);
-
- for (const auto& i : font.tables) {
- if (!WriteTable(i.second, offset, dst, dst_size)) {
- return false;
- }
- }
-
- return true;
-}
-
-bool WriteFontCollection(const FontCollection& font_collection, uint8_t* dst,
- size_t dst_size) {
- size_t offset = 0;
-
- // It's simpler if this just a simple sfnt
- if (font_collection.flavor != kTtcFontFlavor) {
- return WriteFont(font_collection.fonts[0], &offset, dst, dst_size);
- }
-
- // Write TTC header
- StoreU32(kTtcFontFlavor, &offset, dst);
- StoreU32(font_collection.header_version, &offset, dst);
- StoreU32(font_collection.fonts.size(), &offset, dst);
-
- // Offset Table, zeroed for now
- size_t offset_table = offset; // where to write offsets later
- for (size_t i = 0; i < font_collection.fonts.size(); i++) {
- StoreU32(0, &offset, dst);
- }
-
- if (font_collection.header_version == 0x00020000) {
- StoreU32(0, &offset, dst); // ulDsigTag
- StoreU32(0, &offset, dst); // ulDsigLength
- StoreU32(0, &offset, dst); // ulDsigOffset
- }
-
- // Write fonts and their offsets.
- for (size_t i = 0; i < font_collection.fonts.size(); i++) {
- const auto& font = font_collection.fonts[i];
- StoreU32(offset, &offset_table, dst);
- if (!WriteFont(font, &offset, dst, dst_size)) {
- return false;
- }
- }
-
- return true;
-}
-
-int NumGlyphs(const Font& font) {
- const Font::Table* head_table = font.FindTable(kHeadTableTag);
- const Font::Table* loca_table = font.FindTable(kLocaTableTag);
- if (head_table == NULL || loca_table == NULL || head_table->length < 52) {
- return 0;
- }
- int index_fmt = IndexFormat(font);
- uint32_t loca_record_size = (index_fmt == 0 ? 2 : 4);
- if (loca_table->length < loca_record_size) {
- return 0;
- }
- return (loca_table->length / loca_record_size) - 1;
-}
-
-int IndexFormat(const Font& font) {
- const Font::Table* head_table = font.FindTable(kHeadTableTag);
- if (head_table == NULL) {
- return 0;
- }
- return head_table->data[51];
-}
-
-bool Font::Table::IsReused() const {
- return this->reuse_of != NULL;
-}
-
-bool GetGlyphData(const Font& font, int glyph_index,
- const uint8_t** glyph_data, size_t* glyph_size) {
- if (glyph_index < 0) {
- return FONT_COMPRESSION_FAILURE();
- }
- const Font::Table* head_table = font.FindTable(kHeadTableTag);
- const Font::Table* loca_table = font.FindTable(kLocaTableTag);
- const Font::Table* glyf_table = font.FindTable(kGlyfTableTag);
- if (head_table == NULL || loca_table == NULL || glyf_table == NULL ||
- head_table->length < 52) {
- return FONT_COMPRESSION_FAILURE();
- }
-
- int index_fmt = IndexFormat(font);
-
- Buffer loca_buf(loca_table->data, loca_table->length);
- if (index_fmt == 0) {
- uint16_t offset1, offset2;
- if (!loca_buf.Skip(2 * glyph_index) ||
- !loca_buf.ReadU16(&offset1) ||
- !loca_buf.ReadU16(&offset2) ||
- offset2 < offset1 ||
- 2 * offset2 > glyf_table->length) {
- return FONT_COMPRESSION_FAILURE();
- }
- *glyph_data = glyf_table->data + 2 * offset1;
- *glyph_size = 2 * (offset2 - offset1);
- } else {
- uint32_t offset1, offset2;
- if (!loca_buf.Skip(4 * glyph_index) ||
- !loca_buf.ReadU32(&offset1) ||
- !loca_buf.ReadU32(&offset2) ||
- offset2 < offset1 ||
- offset2 > glyf_table->length) {
- return FONT_COMPRESSION_FAILURE();
- }
- *glyph_data = glyf_table->data + offset1;
- *glyph_size = offset2 - offset1;
- }
- return true;
-}
-
-bool RemoveDigitalSignature(Font* font) {
- std::map<uint32_t, Font::Table>::iterator it =
- font->tables.find(kDsigTableTag);
- if (it != font->tables.end()) {
- font->tables.erase(it);
- font->num_tables = font->tables.size();
- }
- return true;
-}
-
-} // namespace woff2