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// Copyright 2014 Google Inc. All Rights Reserved. | ||
// | ||
// Licensed under the Apache License, Version 2.0 (the "License"); | ||
// you may not use this file except in compliance with the License. | ||
// You may obtain a copy of the License at | ||
// | ||
// http://www.apache.org/licenses/LICENSE-2.0 | ||
// | ||
// Unless required by applicable law or agreed to in writing, software | ||
// distributed under the License is distributed on an "AS IS" BASIS, | ||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
// See the License for the specific language governing permissions and | ||
// limitations under the License. | ||
// | ||
// A commandline tool for dumping info about a woff2 file. | ||
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#include <string> | ||
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#include "file.h" | ||
#include "./woff2_common.h" | ||
#include "./buffer.h" | ||
#include "./font.h" | ||
#include "./table_tags.h" | ||
#include "./variable_length.h" | ||
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std::string PrintTag(int tag) { | ||
if (tag & 0x80808080) { | ||
return std::string("_xfm"); // print _xfm for xform tables (else garbage) | ||
} | ||
char printable[] = { | ||
static_cast<char>((tag >> 24) & 0xFF), | ||
static_cast<char>((tag >> 16) & 0xFF), | ||
static_cast<char>((tag >> 8) & 0xFF), | ||
static_cast<char>(tag & 0xFF) | ||
}; | ||
return std::string(printable, 4); | ||
} | ||
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int main(int argc, char **argv) { | ||
using std::string; | ||
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if (argc != 2) { | ||
fprintf(stderr, "One argument, the input filename, must be provided.\n"); | ||
return 1; | ||
} | ||
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string filename(argv[1]); | ||
string outfilename = filename.substr(0, filename.find_last_of(".")) + ".woff2"; | ||
fprintf(stdout, "Processing %s => %s\n", | ||
filename.c_str(), outfilename.c_str()); | ||
string input = woff2::GetFileContent(filename); | ||
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woff2::Buffer file(reinterpret_cast<const uint8_t*>(input.data()), | ||
input.size()); | ||
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printf("WOFF2Header\n"); | ||
uint32_t signature, flavor, length, totalSfntSize, totalCompressedSize; | ||
uint32_t metaOffset, metaLength, metaOrigLength, privOffset, privLength; | ||
uint16_t num_tables, reserved, major, minor; | ||
if (!file.ReadU32(&signature)) return 1; | ||
if (!file.ReadU32(&flavor)) return 1; | ||
if (!file.ReadU32(&length)) return 1; | ||
if (!file.ReadU16(&num_tables)) return 1; | ||
if (!file.ReadU16(&reserved)) return 1; | ||
if (!file.ReadU32(&totalSfntSize)) return 1; | ||
if (!file.ReadU32(&totalCompressedSize)) return 1; | ||
if (!file.ReadU16(&major)) return 1; | ||
if (!file.ReadU16(&minor)) return 1; | ||
if (!file.ReadU32(&metaOffset)) return 1; | ||
if (!file.ReadU32(&metaLength)) return 1; | ||
if (!file.ReadU32(&metaOrigLength)) return 1; | ||
if (!file.ReadU32(&privOffset)) return 1; | ||
if (!file.ReadU32(&privLength)) return 1; | ||
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if (signature != 0x774F4632) { | ||
printf("Invalid signature: %08x\n", signature); | ||
return 1; | ||
} | ||
printf("signature 0x%08x\n", signature); | ||
printf("flavor 0x%08x\n", flavor); | ||
printf("length %d\n", length); | ||
printf("numTables %d\n", num_tables); | ||
printf("reserved %d\n", reserved); | ||
printf("totalSfntSize %d\n", totalSfntSize); | ||
printf("totalCompressedSize %d\n", totalCompressedSize); | ||
printf("majorVersion %d\n", major); | ||
printf("minorVersion %d\n", minor); | ||
printf("metaOffset %d\n", metaOffset); | ||
printf("metaLength %d\n", metaLength); | ||
printf("metaOrigLength %d\n", metaOrigLength); | ||
printf("privOffset %d\n", privOffset); | ||
printf("privLength %d\n", privLength); | ||
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std::vector<uint32_t> table_tags; | ||
printf("TableDirectory starts at +%zu\n", file.offset()); | ||
printf("Entry offset flags tag origLength txLength\n"); | ||
for (auto i = 0; i < num_tables; i++) { | ||
size_t offset = file.offset(); | ||
uint8_t flags; | ||
uint32_t tag, origLength, transformLength; | ||
if (!file.ReadU8(&flags)) return 1; | ||
if ((flags & 0x3f) == 0x3f) { | ||
if (!file.ReadU32(&tag)) return 1; | ||
} else { | ||
tag = woff2::kKnownTags[flags & 0x3f]; | ||
} | ||
table_tags.push_back(tag); | ||
if (!ReadBase128(&file, &origLength)) return 1; | ||
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printf("%5d %6zu 0x%02x %s %10d", i, offset, flags, | ||
PrintTag(tag).c_str(), origLength); | ||
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uint8_t xform_version = (flags >> 6) & 0x3; | ||
if (tag == woff2::kGlyfTableTag || tag == woff2::kLocaTableTag) { | ||
if (xform_version == 0) { | ||
if (!ReadBase128(&file, &transformLength)) return 1; | ||
printf(" %8d", transformLength); | ||
} | ||
} else if (xform_version > 0) { | ||
if (!ReadBase128(&file, &transformLength)) return 1; | ||
printf(" %8d", transformLength); | ||
} | ||
printf("\n"); | ||
} | ||
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// Collection header | ||
if (flavor == woff2::kTtcFontFlavor) { | ||
uint32_t version, numFonts; | ||
if (!file.ReadU32(&version)) return 1; | ||
if (!woff2::Read255UShort(&file, &numFonts)) return 1; | ||
printf("CollectionHeader 0x%08x %d fonts\n", version, numFonts); | ||
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for (auto i = 0; i < numFonts; i++) { | ||
uint32_t numTables, flavor; | ||
if (!woff2::Read255UShort(&file, &numTables)) return 1; | ||
if (!file.ReadU32(&flavor)) return 1; | ||
printf("CollectionFontEntry %d flavor 0x%08x %d tables\n", i, flavor, | ||
numTables); | ||
for (auto j = 0; j < numTables; j++) { | ||
uint32_t table_idx; | ||
if (!woff2::Read255UShort(&file, &table_idx)) return 1; | ||
if (table_idx >= table_tags.size()) return 1; | ||
printf(" %d %s (idx %d)\n", j, | ||
PrintTag(table_tags[table_idx]).c_str(), table_idx); | ||
} | ||
} | ||
} | ||
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printf("TableDirectory ends at +%zu\n", file.offset()); | ||
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return 0; | ||
} |