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/* Copyright 2014 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* A commandline tool for dumping info about a woff2 file. */
#include <string>
#include "file.h"
#include "./woff2_common.h"
#include "./buffer.h"
#include "./font.h"
#include "./table_tags.h"
#include "./variable_length.h"
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);
}
int main(int argc, char **argv) {
if (argc != 2) {
fprintf(stderr, "One argument, the input filename, must be provided.\n");
return 1;
}
std::string filename(argv[1]);
std::string outfilename = filename.substr(0, filename.find_last_of(".")) + ".woff2";
fprintf(stdout, "Processing %s => %s\n",
filename.c_str(), outfilename.c_str());
std::string input = woff2::GetFileContent(filename);
woff2::Buffer file(reinterpret_cast<const uint8_t*>(input.data()),
input.size());
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;
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);
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;
printf("%5d %6zu 0x%02x %s %10d", i, offset, flags,
PrintTag(tag).c_str(), origLength);
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");
}
// 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);
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);
}
}
}
printf("TableDirectory ends at +%zu\n", file.offset());
return 0;
}
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