First public commit.

lenser/atari/convert/__init__.py

@@ -0,0 +1,31 @@
+"""Atari conversion dispatch."""
+
+from __future__ import annotations
+
+from ... import imageprep
+from .. import palette as apal
+from . import gr15
+
+_MODULES = {"gr15": gr15}
+for _name in ("gr9", "gr8", "gr15dli", "mono"):
+    try:
+        _mod = __import__(f"lenser.atari.convert.{_name}", fromlist=[_name])
+        _MODULES[_name] = _mod
+    except Exception:
+        pass
+
+MODES = list(_MODULES.keys())
+
+
+def convert_image(path_or_img, mode="gr15", palette_name="ntsc",
+                  dither_mode="floyd", intensive=False,
+                  prep_opt: imageprep.PrepOptions | None = None, base_color=None):
+    prep_opt = prep_opt or imageprep.PrepOptions()
+    module = _MODULES[mode]
+    border_rgb = apal.get_palette(palette_name)[0]
+    img_rgb = imageprep.prepare(
+        path_or_img, module.WIDTH, module.HEIGHT, module.PIXEL_ASPECT,
+        prep_opt, border_rgb=border_rgb,
+    )
+    return module.convert(img_rgb, palette_name, dither_mode, intensive,
+                          base_color=base_color)