1 files changed, 80 insertions, 0 deletions
diff --git a/src/resources/generate-fonts.py b/src/resources/generate-fonts.py
new file mode 100755
index 00000000..20408166
--- /dev/null
+++ b/src/resources/generate-fonts.py
@@ -0,0 +1,80 @@
+#!/usr/bin/env python
+
+import io
+import sys
+import json
+import shutil
+import typing
+import os.path
+import argparse
+import subprocess
+
+class Source(object):
+    def __init__(self, d):
+        self.file = d['file']
+        if not os.path.exists(self.file):
+            self.file = os.path.join(os.path.dirname(sys.argv[0]), self.file)
+        self.range = d.get('range')
+        self.symbols = d.get('symbols')
+
+
+def gen_lvconv_line(lv_font_conv: str, dest: str, size: int, bpp: int, format: str, sources: typing.List[Source], compress:bool=False):
+    if format != "lvgl" and format != "bin":
+        format = "bin" if dest.lower().endswith(".bin") else "lvgl"
+
+    args = [lv_font_conv, '--size', str(size), '--output', dest, '--bpp', str(bpp), '--format', format]
+    if not compress:
+        args.append('--no-compress')
+    for source in sources:
+        args.extend(['--font', source.file])
+        if source.range:
+            args.extend(['--range', source.range])
+        if source.symbols:
+            args.extend(['--symbols', source.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('-f', '--font', type=str, action='append', help='Choose specific fonts to generate (default: all)', default=[])
+    ap.add_argument('--lv-font-conv', type=str, help='Path to "lv_font_conf" executable', default="lv_font_conv")
+    args = ap.parse_args()
+
+    if not shutil.which(args.lv_font_conv):
+        sys.exit(f"Missing lv_font_conv. Make sure it's findable (in PATH) or specify it manually")
+    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 accessible (permissions?).')
+    with open(args.config, 'r') as fd:
+        data = json.load(fd)
+
+    fonts_to_run = set(data.keys())
+
+    if args.font:
+        enabled_fonts = set()
+        for font in args.font:
+            enabled_fonts.add(font[:-2] if font.endswith('.c') else font)
+        d = enabled_fonts.difference(fonts_to_run)
+        if d:
+            print(f'Warning: requested font{"s" if len(d)>1 else ""} missing: {" ".join(d)}')
+        fonts_to_run = fonts_to_run.intersection(enabled_fonts)
+
+    for name in fonts_to_run:
+        font = data[name]
+        sources = font.pop('sources')
+        patches = font.pop('patches') if 'patches' in font else  []
+        font['sources'] = [Source(thing) for thing in sources]
+        extension = 'c' if font['format'] != 'bin' else 'bin'
+        font.pop('target_path')
+        line = gen_lvconv_line(args.lv_font_conv, f'{name}.{extension}', **font)
+        subprocess.check_call(line)
+        if patches:
+            for patch in patches:
+                subprocess.check_call(['/usr/bin/env', 'patch', name+'.'+extension, patch])
+
+
+
+if __name__ == '__main__':
+    main()