1 files changed, 70 insertions, 0 deletions
diff --git a/src/displayapp/fonts/generate.py b/src/displayapp/fonts/generate.py
new file mode 100644
index 00000000..fea0123b
--- /dev/null
+++ b/src/displayapp/fonts/generate.py
@@ -0,0 +1,70 @@
+#!/usr/bin/env python
+
+import io
+import sys
+import json
+import typing
+import os.path
+import argparse
+import subprocess
+
+class FontArg(object):
+    def __init__(self, d):
+        self.font = d['font']
+        self.range = d.get('range')
+        self.symbols = d.get('symbols')
+
+
+def gen_lvconv_line(dest: str, size: int, bpp: int, fonts: typing.List[FontArg], compress:bool=False):
+    args = ['lv_font_conv', '--size', str(size), '--output', dest, '--bpp', str(bpp), '--format', 'lvgl']
+    if not compress:
+        args.append('--no-compress')
+    for font in fonts:
+        args.extend(['--font', font.font])
+        if font.range:
+            args.extend(['--range', font.range])
+        if font.symbols:
+            args.extend(['--symbols', font.symbols])
+
+    return args
+
+def main():
+    ap = argparse.ArgumentParser(description='auto generate lvGL font files from fonts')
+    ap.add_argument('config', type=str, help='config file to use')
+    ap.add_argument('-e', '--enable', type=str, action='append', help='optional feature to enable in font generation', default=[], metavar='features', dest='features')
+    ap.add_argument('-f', '--font', type=str, action='append', help='Choose specific fonts to generate (default: all)', default=[])
+    args = ap.parse_args()
+
+    if not os.path.exists(args.config):
+        sys.exit(f'Error: the config file {args.config} does not exist.')
+    if not os.access(args.config, os.R_OK):
+        sys.exit(f'Error: the config file {args.config} is not accessable (permissions?).')
+    with open(args.config, 'r') as fd:
+        data = json.load(fd)
+
+    for enabled_feature in args.features:
+        if enabled_feature not in data['features']:
+            sys.exit(f'Error: the requested feature {enabled_feature} does not exist in {args.config}.')
+
+    for (name,font) in data['fonts'].items():
+        if args.font and name not in args.font:
+            continue
+        sources = font.pop('sources')
+        if 'patches' in font:
+            patches = font.pop('patches')
+        else:
+            patches = None
+        for enabled_feature in args.features:
+            if name in data['features'][enabled_feature]:
+                sources.extend(data['features'][enabled_feature][name])
+        font['fonts'] = [FontArg(thing) for thing in sources]
+        line = gen_lvconv_line(f'{name}.c', **font)
+        subprocess.check_call(line)
+        if patches:
+            for patch in patches:
+                subprocess.check_call(patch)
+
+
+
+if __name__ == '__main__':
+    main()