#!/usr/bin/env python3 # Copyright (C) 2019 Max Regan # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. import font import argparse import string def emit_license(output): output.write( """/* * Copyright (C) 2019 Max Regan * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ """) def emit_include(output, header_dir): if header_dir: if header_dir[-1] == '/': header_dir = header_dir[:-1] header = header_dir + "/font.h" else: header = "font.h" output.write(f"#include \"{header}\"\n\n") def ceildiv(num, den): return (num + (den - 1)) // den def to_c_name(name): return name.replace("-","_") def emit_bmp(output, font_name, char, glyph, bmp): width_bytes = ceildiv(bmp.width, 8) output.write(f"// Bitmap for '{char}'\n") name = to_c_name(f"{font_name}_{ord(char)}") output.write(f"static const uint8_t {name}_bitmap[] = {{\n") byte = 0 for y in range(bmp.height): output.write(" ") for x in range(bmp.width): bit_idx = 7 - (x % 8) bit = bmp.pixels[y * bmp.width + x] byte |= bit << bit_idx if bit_idx == 0 or x == bmp.width - 1: output.write('0x{:02x}, '.format(byte)) byte = 0 output.write("\n") output.write("};\n\n") output.write(f"// Glyph data for '{char}'\n") output.write(f"static const struct glyph {name}_glyph = {{\n") output.write(f" .width = {bmp.width},\n") output.write(f" .width_bytes = {width_bytes},\n") output.write(f" .height = {bmp.height},\n") output.write(f" .top = {glyph.top},\n") output.write(f" .left = {glyph.left},\n") output.write(f" .bitmap = {name}_bitmap,\n") output.write("};\n\n") def emit_font(output, ff, font_name, charset, height, width): c_font_name = to_c_name(font_name) output.write(f"const struct font {c_font_name} = {{\n") output.write(f" .name = \"{font_name}\",\n") output.write(f" .height = {height},\n") output.write(f" .width = {width},\n") output.write(f" .glyphs = {{\n") for i in range(128): if chr(i) in charset: name = to_c_name(f"{font_name}_{i}_glyph") output.write(f" [{i}] = &{name},\n") else: output.write(f" [{i}] = NULL,\n") output.write(f" }}\n") output.write("};\n\n") def gen_c_font_file(ttf, output, charset, width=None, size=None, header_dir=None, font_name=None): ff = font.FixedFont(ttf, width=width, height=size) if font_name is None: font_name = ff.face.postscript_name.decode('ASCII') emit_license(output) emit_include(output, header_dir) max_advance = None max_height = None for char in charset: bmp = ff.render_character(char) glyph = ff.glyph_for_character(char) emit_bmp(output, font_name, char, glyph, bmp) advance = glyph.advance_width if not max_advance or advance > max_advance: max_advance = advance height = glyph.top if not max_height or height > max_height: max_height = height emit_font(output, ff, font_name, charset, max_height, max_advance) def gen_h_font_file(ttf, output, header_dir=None, font_name=None): if font_name is None: font_name = ff.face.postscript_name.decode('ASCII') c_font_name = to_c_name(font_name) define_name = f"_FONT_{c_font_name.upper()}_H_" emit_license(output) output.write("\n") output.write(f"#ifndef {define_name}\n") output.write(f"#define {define_name}\n") output.write("\n") emit_include(output, header_dir) output.write(f"extern const struct font {c_font_name};\n") output.write("\n") output.write("#endif") def main(): parser = argparse.ArgumentParser(description="Fixed-width TrueType C code generator") parser.add_argument(dest="filetype", help="The filetype to produce", action="store", type=str, choices=["c","h"]) parser.add_argument(dest="ttf", help="TrueType font file", action="store", type=str) parser.add_argument(dest="output", help="Output file", action="store", type=argparse.FileType('w')) parser.add_argument("--chars", "-c", help="Character set. Defaults to all printable ASCII", action="store", type=str, default="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 -=_+{}[]:\";'<>,.?/~!@#$%^&*()|\\") parser.add_argument("--header-dir", help="Directory of the font.h header", action="store", type=str) parser.add_argument("--name", help="Font name to use in the generated code", action="store", type=str) group = parser.add_mutually_exclusive_group(required=True) group.add_argument("--size", "-s", help="Font pitch", action="store", type=int) group.add_argument("--width", "-w", help="Font width", action="store", type=int) args = parser.parse_args() args.chars = list(set(args.chars)) args.chars.sort() if args.filetype == "c": gen_c_font_file(args.ttf, args.output, args.chars, width=args.width, size=args.size, header_dir=args.header_dir, font_name=args.name) elif args.filetype == "h": gen_h_font_file(args.ttf, args.output, header_dir=args.header_dir, font_name=args.name) if __name__ == "__main__": main()