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/* Copyright 2013 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* 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 <inttypes.h>
#include <stddef.h>
#include <cstdint>
#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),
overlap_simple_flag_set(false),
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;
// Flags.
bool overlap_simple_flag_set;
// 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_
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