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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.
//
// 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_
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