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