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