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-rw-r--r--modules/woff2/src/woff2_info.cc144
1 files changed, 144 insertions, 0 deletions
diff --git a/modules/woff2/src/woff2_info.cc b/modules/woff2/src/woff2_info.cc
new file mode 100644
index 000000000..2b51adcb6
--- /dev/null
+++ b/modules/woff2/src/woff2_info.cc
@@ -0,0 +1,144 @@
+/* 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) {
+ using std::string;
+
+ if (argc != 2) {
+ fprintf(stderr, "One argument, the input filename, must be provided.\n");
+ return 1;
+ }
+
+ 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);
+
+ 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;
+}