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