1 files changed, 172 insertions, 0 deletions
diff --git a/gfx/ots/src/glat.h b/gfx/ots/src/glat.h
new file mode 100644
index 000000000..04c9c1cce
--- /dev/null
+++ b/gfx/ots/src/glat.h
@@ -0,0 +1,172 @@
+// 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) { 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_