Add woff2 to src/third_party

third_party/woff2/src/glyph.h

+// Copyright 2013 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// Data model and I/O for glyph data within sfnt format files for the purpose of
+// performing the preprocessing step of the WOFF 2.0 conversion.
+
+#ifndef WOFF2_GLYPH_H_
+#define WOFF2_GLYPH_H_
+
+#include <stddef.h>
+#include <inttypes.h>
+#include <vector>
+
+namespace woff2 {
+
+// Represents a parsed simple or composite glyph. The composite glyph data and
+// instructions are un-parsed and we keep only pointers to the raw data,
+// therefore the glyph is valid only so long the data from which it was parsed
+// is around.
+class Glyph {
+ public:
+  Glyph() : instructions_size(0), composite_data_size(0) {}
+
+  // Bounding box.
+  int16_t x_min;
+  int16_t x_max;
+  int16_t y_min;
+  int16_t y_max;
+
+  // Instructions.
+  uint16_t instructions_size;
+  const uint8_t* instructions_data;
+
+  // Data model for simple glyphs.
+  struct Point {
+    int x;
+    int y;
+    bool on_curve;
+  };
+  std::vector<std::vector<Point> > contours;
+
+  // Data for composite glyphs.
+  const uint8_t* composite_data;
+  uint32_t composite_data_size;
+  bool have_instructions;
+};
+
+// Parses the glyph from the given data. Returns false on parsing failure or
+// buffer overflow. The glyph is valid only so long the input data pointer is
+// valid.
+bool ReadGlyph(const uint8_t* data, size_t len, Glyph* glyph);
+
+// Stores the glyph into the specified dst buffer. The *dst_size is the buffer
+// size on entry and is set to the actual (unpadded) stored size on exit.
+// Returns false on buffer overflow.
+bool StoreGlyph(const Glyph& glyph, uint8_t* dst, size_t* dst_size);
+
+} // namespace woff2
+
+#endif  // WOFF2_GLYPH_H_