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// Copyright (c) 2009-2017 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_GLAT_H_
#define OTS_GLAT_H_
#include <vector>
#include "ots.h"
#include "graphite.h"
namespace ots {
// -----------------------------------------------------------------------------
// OpenTypeGLAT_Basic Interface
// -----------------------------------------------------------------------------
class OpenTypeGLAT_Basic : public Table {
public:
explicit OpenTypeGLAT_Basic(Font* font, uint32_t tag)
: Table(font, tag, tag) { }
virtual bool Parse(const uint8_t* data, size_t length) = 0;
virtual bool Serialize(OTSStream* out) = 0;
};
// -----------------------------------------------------------------------------
// OpenTypeGLAT_v1
// -----------------------------------------------------------------------------
class OpenTypeGLAT_v1 : public OpenTypeGLAT_Basic {
public:
explicit OpenTypeGLAT_v1(Font* font, uint32_t tag)
: OpenTypeGLAT_Basic(font, tag) { }
bool Parse(const uint8_t* data, size_t length);
bool Serialize(OTSStream* out);
private:
struct GlatEntry : public TablePart<OpenTypeGLAT_v1> {
explicit GlatEntry(OpenTypeGLAT_v1* parent)
: TablePart<OpenTypeGLAT_v1>(parent) { }
bool ParsePart(Buffer& table);
bool SerializePart(OTSStream* out) const;
uint8_t attNum;
uint8_t num;
std::vector<int16_t> attributes;
};
uint32_t version;
std::vector<GlatEntry> entries;
};
// -----------------------------------------------------------------------------
// OpenTypeGLAT_v2
// -----------------------------------------------------------------------------
class OpenTypeGLAT_v2 : public OpenTypeGLAT_Basic {
public:
explicit OpenTypeGLAT_v2(Font* font, uint32_t tag)
: OpenTypeGLAT_Basic(font, tag) { }
bool Parse(const uint8_t* data, size_t length);
bool Serialize(OTSStream* out);
private:
struct GlatEntry : public TablePart<OpenTypeGLAT_v2> {
explicit GlatEntry(OpenTypeGLAT_v2* parent)
: TablePart<OpenTypeGLAT_v2>(parent) { }
bool ParsePart(Buffer& table);
bool SerializePart(OTSStream* out) const;
int16_t attNum;
int16_t num;
std::vector<int16_t> attributes;
};
uint32_t version;
std::vector<GlatEntry> entries;
};
// -----------------------------------------------------------------------------
// OpenTypeGLAT_v3
// -----------------------------------------------------------------------------
class OpenTypeGLAT_v3 : public OpenTypeGLAT_Basic {
public:
explicit OpenTypeGLAT_v3(Font* font, uint32_t tag)
: OpenTypeGLAT_Basic(font, tag) { }
bool Parse(const uint8_t* data, size_t length) {
return this->Parse(data, length, false);
}
bool Serialize(OTSStream* out);
private:
bool Parse(const uint8_t* data, size_t length, bool prevent_decompression);
struct GlyphAttrs : public TablePart<OpenTypeGLAT_v3> {
explicit GlyphAttrs(OpenTypeGLAT_v3* parent)
: TablePart<OpenTypeGLAT_v3>(parent), octabox(parent) { }
bool ParsePart(Buffer& table OTS_UNUSED) { return false; }
bool ParsePart(Buffer& table, const size_t size);
bool SerializePart(OTSStream* out) const;
struct OctaboxMetrics : public TablePart<OpenTypeGLAT_v3> {
explicit OctaboxMetrics(OpenTypeGLAT_v3* parent)
: TablePart<OpenTypeGLAT_v3>(parent) { }
bool ParsePart(Buffer& table);
bool SerializePart(OTSStream* out) const;
struct SubboxEntry : public TablePart<OpenTypeGLAT_v3> {
explicit SubboxEntry(OpenTypeGLAT_v3* parent)
: TablePart<OpenTypeGLAT_v3>(parent) { }
bool ParsePart(Buffer& table);
bool SerializePart(OTSStream* out) const;
uint8_t left;
uint8_t right;
uint8_t bottom;
uint8_t top;
uint8_t diag_pos_min;
uint8_t diag_pos_max;
uint8_t diag_neg_min;
uint8_t diag_neg_max;
};
uint16_t subbox_bitmap;
uint8_t diag_neg_min;
uint8_t diag_neg_max;
uint8_t diag_pos_min;
uint8_t diag_pos_max;
std::vector<SubboxEntry> subboxes;
};
struct GlatEntry : public TablePart<OpenTypeGLAT_v3> {
explicit GlatEntry(OpenTypeGLAT_v3* parent)
: TablePart<OpenTypeGLAT_v3>(parent) { }
bool ParsePart(Buffer& table);
bool SerializePart(OTSStream* out) const;
int16_t attNum;
int16_t num;
std::vector<int16_t> attributes;
};
OctaboxMetrics octabox;
std::vector<GlatEntry> entries;
};
uint32_t version;
uint32_t compHead; // compression header
static const uint32_t SCHEME = 0xF8000000;
static const uint32_t FULL_SIZE = 0x07FFFFFF;
static const uint32_t RESERVED = 0x07FFFFFE;
static const uint32_t OCTABOXES = 0x00000001;
std::vector<GlyphAttrs> entries;
};
// -----------------------------------------------------------------------------
// OpenTypeGLAT
// -----------------------------------------------------------------------------
class OpenTypeGLAT : public Table {
public:
explicit OpenTypeGLAT(Font* font, uint32_t tag)
: Table(font, tag, tag), font(font), tag(tag) { }
OpenTypeGLAT(const OpenTypeGLAT& other) = delete;
OpenTypeGLAT& operator=(const OpenTypeGLAT& other) = delete;
~OpenTypeGLAT() { delete handler; }
bool Parse(const uint8_t* data, size_t length);
bool Serialize(OTSStream* out);
private:
Font* font;
uint32_t tag;
OpenTypeGLAT_Basic* handler = nullptr;
};
} // namespace ots
#endif // OTS_GLAT_H_
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