proper fix for sag.

Author: comfyanonymous

comfy_extras/nodes_sag.py

@@ -58,16 +58,23 @@ def create_blur_map(x0, attn, sigma=3.0, threshold=1.0):
     # Global Average Pool
     mask = attn.mean(1, keepdim=False).sum(1, keepdim=False) > threshold
 
-    f = float(lh) / float(lw)
-    fh = f ** 0.5
-    fw = (1/f) ** 0.5
-    S = mask.size(1) ** 0.5
-    w = int(0.5 + S * fw)
-    h = int(0.5 + S * fh)
+    total = mask.shape[-1]
+    x = round(math.sqrt((lh / lw) * total))
+    xx = None
+    for i in range(0, math.floor(math.sqrt(total) / 2)):
+        for j in [(x + i), max(1, x - i)]:
+            if total % j == 0:
+                xx = j
+                break
+        if xx is not None:
+            break
+
+    x = xx
+    y = total // x
 
     # Reshape
     mask = (
-        mask.reshape(b, h, w)
+        mask.reshape(b, x, y)
         .unsqueeze(1)
         .type(attn.dtype)
     )