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72 lines
1.8 KiB
72 lines
1.8 KiB
// Copyright 2014 Google Inc. All Rights Reserved. |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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// |
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// Common definition for WOFF2 encoding/decoding |
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#ifndef WOFF2_WOFF2_COMMON_H_ |
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#define WOFF2_WOFF2_COMMON_H_ |
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#include <stddef.h> |
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#include <inttypes.h> |
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#include <string> |
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namespace woff2 { |
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static const uint32_t kWoff2Signature = 0x774f4632; // "wOF2" |
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const unsigned int kWoff2FlagsContinueStream = 1 << 4; |
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const unsigned int kWoff2FlagsTransform = 1 << 5; |
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// TrueType Collection ID string: 'ttcf' |
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static const uint32_t kTtcFontFlavor = 0x74746366; |
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static const size_t kSfntHeaderSize = 12; |
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static const size_t kSfntEntrySize = 16; |
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struct Point { |
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int x; |
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int y; |
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bool on_curve; |
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}; |
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struct Table { |
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uint32_t tag; |
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uint32_t flags; |
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uint32_t src_offset; |
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uint32_t src_length; |
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uint32_t transform_length; |
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uint32_t dst_offset; |
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uint32_t dst_length; |
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const uint8_t* dst_data; |
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bool operator<(const Table& other) const { |
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return tag < other.tag; |
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} |
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}; |
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// Size of the collection header. 0 if version indicates this isn't a |
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// collection. Ref http://www.microsoft.com/typography/otspec/otff.htm, |
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// True Type Collections |
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size_t CollectionHeaderSize(uint32_t header_version, uint32_t num_fonts); |
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// Compute checksum over size bytes of buf |
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uint32_t ComputeULongSum(const uint8_t* buf, size_t size); |
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} // namespace woff2 |
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#endif // WOFF2_WOFF2_COMMON_H_
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