156 lines
3.5 KiB
C++
156 lines
3.5 KiB
C++
// Copyright (c) 2018 The OTS Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef OTS_STAT_H_
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#define OTS_STAT_H_
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#include <vector>
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#include "ots.h"
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namespace ots {
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// -----------------------------------------------------------------------------
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// OpenTypeSTAT Interface
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// -----------------------------------------------------------------------------
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class OpenTypeSTAT : public Table {
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public:
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explicit OpenTypeSTAT(Font* font, uint32_t tag)
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: Table(font, tag, tag) { }
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bool Parse(const uint8_t* data, size_t length);
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bool Serialize(OTSStream* out);
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private:
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bool ValidateNameId(uint16_t nameid, bool allowPredefined = true);
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uint16_t majorVersion;
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uint16_t minorVersion;
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uint16_t designAxisSize;
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uint16_t designAxisCount;
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uint32_t designAxesOffset;
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uint16_t axisValueCount;
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uint32_t offsetToAxisValueOffsets;
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uint16_t elidedFallbackNameID;
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struct AxisRecord {
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uint32_t axisTag;
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uint16_t axisNameID;
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uint16_t axisOrdering;
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};
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std::vector<AxisRecord> designAxes;
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typedef int32_t Fixed; /* 16.16 fixed-point value */
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struct AxisValueFormat1 {
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uint16_t axisIndex;
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uint16_t flags;
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uint16_t valueNameID;
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Fixed value;
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static size_t Length() {
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return 3 * sizeof(uint16_t) + sizeof(Fixed);
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}
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};
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struct AxisValueFormat2 {
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uint16_t axisIndex;
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uint16_t flags;
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uint16_t valueNameID;
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Fixed nominalValue;
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Fixed rangeMinValue;
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Fixed rangeMaxValue;
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static size_t Length() {
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return 3 * sizeof(uint16_t) + 3 * sizeof(Fixed);
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}
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};
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struct AxisValueFormat3 {
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uint16_t axisIndex;
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uint16_t flags;
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uint16_t valueNameID;
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Fixed value;
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Fixed linkedValue;
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static size_t Length() {
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return 3 * sizeof(uint16_t) + 2 * sizeof(Fixed);
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}
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};
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struct AxisValueFormat4 {
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uint16_t axisCount;
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uint16_t flags;
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uint16_t valueNameID;
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struct AxisValue {
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uint16_t axisIndex;
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Fixed value;
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};
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std::vector<AxisValue> axisValues;
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size_t Length() const {
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return 3 * sizeof(uint16_t) + axisValues.size() * (sizeof(uint16_t) + sizeof(Fixed));
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}
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};
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struct AxisValueRecord {
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uint16_t format;
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union {
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AxisValueFormat1 format1;
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AxisValueFormat2 format2;
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AxisValueFormat3 format3;
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AxisValueFormat4 format4;
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};
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explicit AxisValueRecord(uint16_t format_)
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: format(format_)
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{
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if (format == 4) {
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new (&this->format4) AxisValueFormat4();
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}
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}
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AxisValueRecord(const AxisValueRecord& other_)
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: format(other_.format)
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{
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switch (format) {
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case 1:
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format1 = other_.format1;
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break;
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case 2:
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format2 = other_.format2;
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break;
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case 3:
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format3 = other_.format3;
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break;
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case 4:
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new (&this->format4) AxisValueFormat4();
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format4 = other_.format4;
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break;
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}
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}
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~AxisValueRecord() {
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if (format == 4) {
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this->format4.~AxisValueFormat4();
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}
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}
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uint32_t Length() const {
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switch (format) {
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case 1:
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return sizeof(uint16_t) + format1.Length();
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case 2:
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return sizeof(uint16_t) + format2.Length();
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case 3:
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return sizeof(uint16_t) + format3.Length();
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case 4:
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return sizeof(uint16_t) + format4.Length();
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default:
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// can't happen
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return 0;
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}
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}
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};
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std::vector<AxisValueRecord> axisValues;
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};
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} // namespace ots
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#endif // OTS_STAT_H_
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