general ipc calls

cli/src/zshell/subcommands/wallpaper.py

@@ -1,6 +1,8 @@
 import subprocess
 import typer
 
+from typing import Annotated
+from PIL import Image, ImageFilter
 from pathlib import Path
 
 args = ["qs", "-c", "zshell"]
@@ -12,3 +14,27 @@ app = typer.Typer()
 def set(wallpaper: Path):
     subprocess.run(args + ["ipc"] + ["call"] +
                    ["wallpaper"] + ["set"] + [wallpaper], check=True)
+
+
+@app.command()
+def lockscreen(
+        input_image: Annotated[
+            Path,
+            typer.Option(),
+        ],
+        output_path: Annotated[
+            Path,
+            typer.Option(),
+        ],
+        blur_amount: int = 20
+):
+    img = Image.open(input_image)
+    size = img.size
+    if (size[0] < 3840 or size[1] < 2160):
+        img = img.resize((size[0] // 2, size[1] // 2), Image.NEAREST)
+    else:
+        img = img.resize((size[0] // 4, size[1] // 4), Image.NEAREST)
+
+    img = img.filter(ImageFilter.GaussianBlur(blur_amount))
+
+    img.save(output_path, "PNG")