Bestiary portraits in the high-res style: a painted pixel-art bust for every creature

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

art/generated/portraits/scripts/gen.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+# Generate bestiary portraits with fal-ai/nano-banana-pro/edit; the reference image is the
+# front and front three-quarter view of the creature's 64 px idle sheet, scaled up 6x.
+import base64, io, json, os, sys, urllib.request, concurrent.futures as cf
+from PIL import Image
+
+sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
+from portraits import CREATURES, prompt_for, sheet
+
+OUT = "/home/zink/Projects/dungeoncraft/art/generated/portraits"
+KEY = open(os.path.expanduser("~/.config/dungeoncraft/fal-key")).read().strip()
+EXTRA = os.environ.get("EXTRA", "")
+
+
+def ref_uri(cid):
+    im = Image.open(sheet(cid)).convert("RGBA")
+    h = im.height
+    two = im.crop((0, 0, 2 * h, h)).resize((12 * h, 6 * h), Image.NEAREST)
+    bg = Image.new("RGBA", two.size, (40, 36, 44, 255))
+    bg.alpha_composite(two)
+    buf = io.BytesIO()
+    bg.convert("RGB").save(buf, "PNG")
+    return "data:image/png;base64," + base64.b64encode(buf.getvalue()).decode()
+
+
+def gen(cid, suffix=""):
+    body = {"prompt": prompt_for(cid, EXTRA), "image_urls": [ref_uri(cid)], "aspect_ratio": "1:1",
+            "resolution": "1K", "num_images": 1, "output_format": "png"}
+    req = urllib.request.Request("https://fal.run/fal-ai/nano-banana-pro/edit", data=json.dumps(body).encode(),
+                                 headers={"Authorization": "Key " + KEY, "Content-Type": "application/json"})
+    try:
+        with urllib.request.urlopen(req, timeout=600) as r:
+            res = json.load(r)
+        with urllib.request.urlopen(res["images"][0]["url"], timeout=300) as r:
+            data = r.read()
+        path = f"{OUT}/{cid}-raw{suffix}.png"
+        open(path, "wb").write(data)
+        return cid, "ok " + path
+    except Exception as e:
+        msg = str(e)
+        if hasattr(e, "read"):
+            try:
+                msg += " " + e.read().decode()[:300]
+            except Exception:
+                pass
+        return cid, "ERROR " + msg
+
+
+if __name__ == "__main__":
+    ids = sys.argv[1:] or [c["id"] for c in CREATURES]
+    suffix = os.environ.get("SUFFIX", "")
+    with cf.ThreadPoolExecutor(4) as ex:
+        for cid, st in ex.map(lambda i: gen(i, suffix), ids):
+            print(cid, st, flush=True)