1 files changed, 64 insertions, 0 deletions
diff --git a/modules/woff2/src/woff2_common.h b/modules/woff2/src/woff2_common.h
new file mode 100644
index 0000000000..51fd4a7bf8
--- /dev/null
+++ b/modules/woff2/src/woff2_common.h
@@ -0,0 +1,64 @@
+/* Copyright 2014 Google Inc. All Rights Reserved.
+
+   Distributed under MIT license.
+   See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+/* Common definition for WOFF2 encoding/decoding */
+
+#ifndef WOFF2_WOFF2_COMMON_H_
+#define WOFF2_WOFF2_COMMON_H_
+
+#include <stddef.h>
+#include <inttypes.h>
+
+#include <string>
+
+namespace woff2 {
+
+static const uint32_t kWoff2Signature = 0x774f4632;  // "wOF2"
+
+// Leave the first byte open to store flag_byte
+const unsigned int kWoff2FlagsTransform = 1 << 8;
+
+// TrueType Collection ID string: 'ttcf'
+static const uint32_t kTtcFontFlavor = 0x74746366;
+
+static const size_t kSfntHeaderSize = 12;
+static const size_t kSfntEntrySize = 16;
+
+struct Point {
+  int x;
+  int y;
+  bool on_curve;
+};
+
+struct Table {
+  uint32_t tag;
+  uint32_t flags;
+  uint32_t src_offset;
+  uint32_t src_length;
+
+  uint32_t transform_length;
+
+  uint32_t dst_offset;
+  uint32_t dst_length;
+  const uint8_t* dst_data;
+
+  bool operator<(const Table& other) const {
+    return tag < other.tag;
+  }
+};
+
+
+// Size of the collection header. 0 if version indicates this isn't a
+// collection. Ref http://www.microsoft.com/typography/otspec/otff.htm,
+// True Type Collections
+size_t CollectionHeaderSize(uint32_t header_version, uint32_t num_fonts);
+
+// Compute checksum over size bytes of buf
+uint32_t ComputeULongSum(const uint8_t* buf, size_t size);
+
+} // namespace woff2
+
+#endif  // WOFF2_WOFF2_COMMON_H_