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73 lines
1.8 KiB
Plaintext
73 lines
1.8 KiB
Plaintext
// 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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