feat: tty and ttf, you'd think somethn starting with tt would be fun to do...

1 files changed, 41 insertions, 0 deletions

diff --git a/tools/genfonts.py b/tools/genfonts.py
new file mode 100644
index 0000000..e5afb7e
--- /dev/null
+++ b/tools/genfonts.py
@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+# this just turns the linxu console fonts which are C arrays into psf1 fonts
+# that i can load on disk since half of my psf1 fonts are stolen from there.
+#
+# usage: genfonts.py <font_8x16.c> <out.psf> [height]
+
+import re
+import sys
+
+
+def parse_c(path):
+    text = open(path).read()
+    cut = text.index("}, {")
+    body = text[cut + 4 :]
+    body = re.sub(r"/\*.*?\*/", "", body, flags=re.S)
+    bytes_ = [int(m, 16) for m in re.findall(r"0x([0-9a-fA-F]{2})", body)]
+    return bytes_
+
+def write_psf1(rows, height, out):
+    count = len(rows) // height
+    if count < 256:
+        rows = rows + [0] * (height * (256 - count))
+        count = 256
+    if count not in (256, 512):
+        rows = rows[: height * 256]
+        count = 256
+    mode = 0x00 if count == 256 else 0x01  # bit0 set => 512 glyphs
+    header = bytes([0x36, 0x04, mode, height])
+    with open(out, "wb") as f:
+        f.write(header)
+        f.write(bytes(rows[: height * count]))
+
+def main():
+    src, out = sys.argv[1], sys.argv[2]
+    height = int(sys.argv[3]) if len(sys.argv) > 3 else int(re.search(r"8x(\d+)", src).group(1))
+    rows = parse_c(src)
+    write_psf1(rows, height, out)
+    print(f"{out}: psf1 8x{height}, {len(rows) // height} glyphs in")
+
+if __name__ == "__main__":
+    main()