First public commit.

lenser/amiga/convert/mono.py

@@ -0,0 +1,22 @@
+"""Amiga monochrome: 320x200, 16 grey levels (the Amiga has true 16 greys)."""
+from __future__ import annotations
+
+from ...convert.base import Conversion
+from . import _common
+
+WIDTH, HEIGHT = 320, 200
+PIXEL_ASPECT = 1.0
+NCOL = 16
+
+
+def convert(img_rgb, palette_name="amiga", dither_mode="floyd",
+            intensive=False, base_color=None):
+    planes, colors, preview, err = _common.flat_encode(
+        img_rgb, NCOL, dither_mode, mono=True, base_color=base_color)
+    return Conversion(
+        mode="mono", width=WIDTH, height=HEIGHT, pixel_aspect=PIXEL_ASPECT,
+        index_image=None,
+        data={"planes": planes, "colors": colors, "nplanes": 4, "ham": False},
+        data_addr=0, viewer="amiga", preview_rgb=preview, error=err,
+        meta={"palette": "amiga", "dither": dither_mode},
+    )