52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
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// Utility functions for exporting to C source code files.
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#pragma once
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#include <string>
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#include <vector>
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#include <iostream>
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#include <functional>
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#include "datafile.hh"
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namespace mcufont {
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// Convert a file name to a valid C identifier
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std::string filename_to_identifier(std::string name);
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// Write a vector of integers as line-wrapped hex/integer data for initializing const array.
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void wordwrap_vector(std::ostream &out, const std::vector<unsigned> &data,
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const std::string &prefix, size_t width = 2);
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// Write a vector of integers as a C constant array of given datatype.
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void write_const_table(std::ostream &out, const std::vector<unsigned> &data,
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const std::string &datatype, const std::string &tablename,
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size_t width = 2);
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// Get minimum tracking width of font
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int get_min_x_advance(const DataFile &datafile);
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// Get maximum tracking width of font
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int get_max_x_advance(const DataFile &datafile);
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// Select the character to use as a fallback.
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int select_fallback_char(const DataFile &datafile);
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// Structure to represent one consecutive range of characters.
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struct char_range_t
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{
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uint16_t first_char;
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uint16_t char_count;
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std::vector<int> glyph_indices;
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char_range_t(): first_char(0), char_count(0) {}
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};
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// Decide how to best divide the characters in the font into ranges.
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// Limitations are:
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// - Gaps longer than minimum_gap should result in separate ranges.
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// - Each range can have encoded data size of at most maximum_size.
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std::vector<char_range_t> compute_char_ranges(const DataFile &datafile,
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std::function<size_t(size_t)> get_encoded_glyph_size,
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size_t maximum_size,
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size_t minimum_gap);
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}
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