add font support

utils/romfont_to_pyfont.py

@@ -0,0 +1,88 @@
+#!/usr/bin/env python
+"""
+Convert fonts from the font-bin directory of spacerace's
+https://github.com/spacerace/romfont repo.
+
+Reads all romfont bin files from the specified -input-directory (-i) and writes
+python font files to the specified -output-directory (-o).  Optionally limiting
+characters included to -first-char (-f) thru -last-char (-l).
+
+Example:
+
+    font_from_romfont -i font-bin -o pyfont -f 32 -l 127
+
+requires argparse
+"""
+import os
+import re
+import argparse
+
+def convert_font(file_in, file_out, width, height, first=0x0, last=0xff, font_type="rom"):
+    chunk_size = height
+    with open(file_in, "rb") as bin_file:
+        bin_file.seek(first * height)
+        current = first
+        with open(file_out, 'wt') as font_file:
+            print(f'"""converted from {file_in} """', file=font_file)
+            print(f"FONT_TYPE = {font_type}", file=font_file)
+            print(f'WIDTH = {width}', file=font_file)
+            print(f'HEIGHT = {height}', file=font_file)
+            print(f'FIRST = 0x{first:02x}', file=font_file)
+            print(f'LAST = 0x{last:02x}', file=font_file)
+            print('_FONT =\\\n', sep='', end='', file=font_file)
+            for chunk in iter(lambda: bin_file.read(chunk_size), b''):
+                print('b\'', sep='', end='', file=font_file)
+                for data in chunk:
+                    print(f'\\x{data:02x}', end='', file=font_file)
+                print('\'\\', file=font_file)
+                current += 1
+                if current > last:
+                    break
+
+            print('', file=font_file)
+            print('FONT = memoryview(_FONT)', file=font_file)
+
+def auto_int(x):
+    return int(x, 0)
+
+def main():
+    parser = argparse.ArgumentParser(
+        description='Convert Romfont.bin font files in input to python in font_directory.')
+    parser.add_argument('input', help='file or directory containing binary font file(s).')
+    parser.add_argument('output', help='file or directory to contain python font file(s).')
+    parser.add_argument('-f', '--first-char', type=auto_int, default=0x20)
+    parser.add_argument('-l', '--last-char', type=auto_int, default=0x7f)
+    args = parser.parse_args()
+
+    file_re = re.compile(r'^(.*)(\d+)x(\d+)\.bin$')
+
+    is_dir = os.path.isdir(args.input)
+    bin_files = os.listdir(args.input) if is_dir else [args.input]
+    for bin_file_name in bin_files:
+        match = file_re.match(bin_file_name)
+        if match:
+            font_width = int(match.group(2))
+            font_height = int(match.group(3))
+
+            if is_dir:
+                bin_file_name = args.input+'/'+bin_file_name
+
+            if is_dir:
+                font_file_name = (
+                    args.font_directory + '/' +
+                    match.group(1).rstrip('_').lower()+
+                    f'_{font_width}x{font_height}.py')
+            else:
+                font_file_name = args.output
+
+            print("converting", bin_file_name, 'to', font_file_name)
+
+            convert_font(
+                bin_file_name,
+                font_file_name,
+                font_width,
+                font_height,
+                args.first_char,
+                args.last_char)
+
+main()