1 files changed, 52 insertions, 0 deletions
diff --git a/tools/mcufontencoder/src/exporttools.hh b/tools/mcufontencoder/src/exporttools.hh
new file mode 100644
index 00000000..383d3b11
--- /dev/null
+++ b/tools/mcufontencoder/src/exporttools.hh
@@ -0,0 +1,52 @@
+// 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);
+
+}
+\ No newline at end of file