Full color support, rework the directory structure
This commit is contained in:
189
firmware/Gen/fixedfont-to-c.py
Executable file
189
firmware/Gen/fixedfont-to-c.py
Executable file
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#!/usr/bin/env python3
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# Copyright (C) 2019 Max Regan
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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import font
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import argparse
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import string
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def emit_license(output):
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output.write(
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"""/*
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* Copyright (C) 2019 Max Regan
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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""")
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def emit_include(output, header_dir):
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if header_dir:
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if header_dir[-1] == '/':
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header_dir = header_dir[:-1]
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header = header_dir + "/font.h"
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else:
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header = "font.h"
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output.write(f"#include \"{header}\"\n\n")
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def ceildiv(num, den):
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return (num + (den - 1)) // den
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def to_c_name(name):
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return name.replace("-","_")
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def emit_bmp(output, font_name, char, glyph, bmp):
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width_bytes = ceildiv(bmp.width, 8)
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output.write(f"// Bitmap for '{char}'\n")
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name = to_c_name(f"{font_name}_{ord(char)}")
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output.write(f"static const uint8_t {name}_bitmap[] = {{\n")
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byte = 0
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for y in range(bmp.height):
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output.write(" ")
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for x in range(bmp.width):
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bit_idx = 7 - (x % 8)
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bit = bmp.pixels[y * bmp.width + x]
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byte |= bit << bit_idx
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if bit_idx == 0 or x == bmp.width - 1:
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output.write('0x{:02x}, '.format(byte))
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byte = 0
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output.write("\n")
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output.write("};\n\n")
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output.write(f"// Glyph data for '{char}'\n")
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output.write(f"static const struct glyph {name}_glyph = {{\n")
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output.write(f" .width = {bmp.width},\n")
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output.write(f" .width_bytes = {width_bytes},\n")
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output.write(f" .height = {bmp.height},\n")
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output.write(f" .top = {glyph.top},\n")
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output.write(f" .left = {glyph.left},\n")
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output.write(f" .bitmap = {name}_bitmap,\n")
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output.write("};\n\n")
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def emit_font(output, ff, font_name, charset, height, width):
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c_font_name = to_c_name(font_name)
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output.write(f"const struct font {c_font_name} = {{\n")
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output.write(f" .name = \"{font_name}\",\n")
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output.write(f" .height = {height},\n")
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output.write(f" .width = {width},\n")
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output.write(f" .glyphs = {{\n")
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for i in range(128):
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if chr(i) in charset:
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name = to_c_name(f"{font_name}_{i}_glyph")
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output.write(f" [{i}] = &{name},\n")
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else:
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output.write(f" [{i}] = NULL,\n")
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output.write(f" }}\n")
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output.write("};\n\n")
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def gen_c_font_file(ttf, output, charset, width=None, size=None, header_dir=None, font_name=None):
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ff = font.FixedFont(ttf, width=width, height=size)
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if font_name is None:
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font_name = ff.face.postscript_name.decode('ASCII')
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emit_license(output)
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emit_include(output, header_dir)
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max_advance = None
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max_height = None
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for char in charset:
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bmp = ff.render_character(char)
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glyph = ff.glyph_for_character(char)
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emit_bmp(output, font_name, char, glyph, bmp)
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advance = glyph.advance_width
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if not max_advance or advance > max_advance:
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max_advance = advance
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height = glyph.top
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if not max_height or height > max_height:
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max_height = height
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emit_font(output, ff, font_name, charset, max_height, max_advance)
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def gen_h_font_file(ttf, output, header_dir=None, font_name=None):
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if font_name is None:
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font_name = ff.face.postscript_name.decode('ASCII')
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c_font_name = to_c_name(font_name)
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define_name = f"_FONT_{c_font_name.upper()}_H_"
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emit_license(output)
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output.write("\n")
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output.write(f"#ifndef {define_name}\n")
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output.write(f"#define {define_name}\n")
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output.write("\n")
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emit_include(output, header_dir)
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output.write(f"extern const struct font {c_font_name};\n")
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output.write("\n")
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output.write("#endif")
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def main():
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parser = argparse.ArgumentParser(description="Fixed-width TrueType C code generator")
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parser.add_argument(dest="filetype", help="The filetype to produce", action="store", type=str, choices=["c","h"])
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parser.add_argument(dest="ttf", help="TrueType font file", action="store", type=str)
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parser.add_argument(dest="output", help="Output file", action="store", type=argparse.FileType('w'))
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parser.add_argument("--chars", "-c", help="Character set. Defaults to all printable ASCII", action="store", type=str,
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default="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 -=_+{}[]:\";'<>,.?/~!@#$%^&*()|\\")
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parser.add_argument("--header-dir", help="Directory of the font.h header", action="store", type=str)
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parser.add_argument("--name", help="Font name to use in the generated code", action="store", type=str)
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group = parser.add_mutually_exclusive_group(required=True)
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group.add_argument("--size", "-s", help="Font pitch", action="store", type=int)
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group.add_argument("--width", "-w", help="Font width", action="store", type=int)
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args = parser.parse_args()
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args.chars = list(set(args.chars))
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args.chars.sort()
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if args.filetype == "c":
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gen_c_font_file(args.ttf, args.output, args.chars, width=args.width,
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size=args.size, header_dir=args.header_dir, font_name=args.name)
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elif args.filetype == "h":
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gen_h_font_file(args.ttf, args.output, header_dir=args.header_dir, font_name=args.name)
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if __name__ == "__main__":
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main()
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