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