diff --git a/screen-sizes b/screen-sizes
index bd3fea8..197e092 100755
--- a/screen-sizes
+++ b/screen-sizes
@@ -1,4 +1,5 @@
 #!/home/hjp/venv/screen-sizes/bin/python
+import argparse
 import json
 import sys
 
@@ -6,46 +7,92 @@ import PIL.Image
 import PIL.ImageDraw
 import PIL.ImageFont
 
-sizes = []
-with open(sys.argv[1]) as fh:
-    for ln in fh:
-        audit_record = json.loads(ln[ln.find("{"):])
-        sizes.append(audit_record["data"]["device_info"]["viewport"])
+ap = argparse.ArgumentParser()
+ap.add_argument("--format", choices=("audit", "matomo"), required=True)
+ap.add_argument("file")
+args = ap.parse_args()
 
-widths = sorted(set(s["width"] for s in sizes))
-heights = sorted(set(s["height"] for s in sizes))
-width = widths[-1]
-height = heights[-1]
-print(width, height)
+if args.format == "audit":
+    sizes = []
+    with open(args.file) as fh:
+        for ln in fh:
+            audit_record = json.loads(ln[ln.find("{"):])
+            sizes.append(audit_record["data"]["device_info"]["viewport"])
 
-dist = [
-    [0] * width
-    for y in range(height)
-]
+    widths = sorted(set(s["width"] for s in sizes))
+    heights = sorted(set(s["height"] for s in sizes))
+    width = widths[-1]
+    height = heights[-1]
+    print(width, height)
 
-for i, s in enumerate(sizes):
-    w = s["width"]
-    h = s["height"]
-    print(i, w, h)
-    for y in range(h):
+    dist = [
+        [0] * width
+        for y in range(height)
+    ]
+
+    for i, s in enumerate(sizes):
+        w = s["width"]
+        h = s["height"]
+        print(i, w, h)
+        for y in range(h):
+            for x in range(w):
+                dist[y][x] += 1
+
+    dist_w = [0] * width
+    for i, s in enumerate(sizes):
+        w = s["width"]
         for x in range(w):
-            dist[y][x] += 1
+            dist_w[x] += 1
 
-dist_w = [0] * width
-for i, s in enumerate(sizes):
-    w = s["width"]
-    for x in range(w):
-        dist_w[x] += 1
+    dist_h = [0] * height
+    for i, s in enumerate(sizes):
+        h = s["height"]
+        for y in range(h):
+            dist_h[y] += 1
+elif args.format == "matomo":
+    sizes = []
+    with open(args.file) as fh:
+        data = json.load(fh)
+        for dp in data:
+            w, _, h = dp["label"].partition("x")
+            w = int(w)
+            h = int(h)
+            sizes.append({"width": w, "height": h, "count": dp["nb_visits"]})
+    widths = sorted(set(s["width"] for s in sizes))
+    heights = sorted(set(s["height"] for s in sizes))
+    width = widths[-1]
+    height = heights[-1]
+    print(width, height)
+
+    dist = [
+        [0] * width
+        for y in range(height)
+    ]
+
+    for i, s in enumerate(sizes):
+        w = s["width"]
+        h = s["height"]
+        print(i, w, h)
+        for y in range(h):
+            for x in range(w):
+                dist[y][x] += s["count"]
+
+    dist_w = [0] * width
+    for i, s in enumerate(sizes):
+        w = s["width"]
+        for x in range(w):
+            dist_w[x] += s["count"]
+
+    dist_h = [0] * height
+    for i, s in enumerate(sizes):
+        h = s["height"]
+        for y in range(h):
+            dist_h[y] += s["count"]
 
-dist_h = [0] * height
-for i, s in enumerate(sizes):
-    h = s["height"]
-    for y in range(h):
-        dist_h[y] += 1
 
 origin_x = origin_y = 150
 img = PIL.Image.new('L', (width+origin_x, height+origin_y))
-max_val = len(sizes)
+max_val = dist[0][0]
 for y in range(height):
     for x in range(width):
         img.putpixel((x+origin_x, y+origin_y), int(dist[y][x] * 255 / max_val))