Initial commit of font compression code into public project.

cpp/woff2-decompress.cc

@@ -0,0 +1,61 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// A very simple commandline tool for decompressing woff2 format files
+// (given as argc[1]), writing the decompressed version to stdout.
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <cstdio>
+#include <cstdlib>
+
+#include "opentype-sanitiser.h"
+#include "woff2.h"
+
+namespace {
+
+int Usage(const char *argv0) {
+  std::fprintf(stderr, "Usage: %s woff2_file > dest_ttf_file\n", argv0);
+  return 1;
+}
+
+}  // namespace
+
+int main(int argc, char **argv) {
+  if (argc != 2) return Usage(argv[0]);
+  if (::isatty(1)) return Usage(argv[0]);
+
+  const int fd = ::open(argv[1], O_RDONLY);
+  if (fd < 0) {
+    ::perror("open");
+    return 1;
+  }
+
+  struct stat st;
+  ::fstat(fd, &st);
+
+  uint8_t *data = new uint8_t[st.st_size];
+  if (::read(fd, data, st.st_size) != st.st_size) {
+    ::perror("read");
+    return 1;
+  }
+  ::close(fd);
+
+  size_t decompressed_size = ots::ComputeWOFF2FinalSize(data, st.st_size);
+  if (decompressed_size == 0) {
+    std::fprintf(stderr, "Error computing decompressed file size!\n");
+    return 1;
+  }
+  uint8_t *buf = new uint8_t[decompressed_size];
+  const bool result = ots::ConvertWOFF2ToTTF(buf, decompressed_size,
+    data, st.st_size);
+
+  if (!result) {
+    std::fprintf(stderr, "Failed to decompress file!\n");
+  }
+  fwrite(buf, 1, decompressed_size, stdout);
+  return !result;
+}