commit 10e29c3e3947f3fd61c6de75bfab4fe7f5496a8e
Author: Peter J. Holzer <hjp@hjp.at>
Date:   Wed Feb 15 14:24:50 2023 +0100

    Create visual representation of viewport sizes from usradm audit log

diff --git a/screen-sizes b/screen-sizes
new file mode 100755
index 0000000..bd3fea8
--- /dev/null
+++ b/screen-sizes
@@ -0,0 +1,73 @@
+#!/home/hjp/venv/screen-sizes/bin/python
+import json
+import sys
+
+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"])
+
+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] += 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
+
+origin_x = origin_y = 150
+img = PIL.Image.new('L', (width+origin_x, height+origin_y))
+max_val = len(sizes)
+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))
+for x in range(width):
+    img.putpixel((x+origin_x, -int(dist_w[x] * 100 / max_val) + origin_y), 255)
+for y in range(height):
+    img.putpixel((-int(dist_h[y] * 100 / max_val) + origin_x, y + origin_y), 255)
+
+draw = PIL.ImageDraw.Draw(img)
+font = PIL.ImageFont.truetype("/usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf", 16)
+txt_img = PIL.Image.new('L', (50, 20))
+txt_draw = PIL.ImageDraw.Draw(txt_img)
+
+for x in widths:
+    draw.line(((x + origin_x, -100 + origin_y), (x + origin_x, origin_y)), 128)
+    txt_draw.rectangle(((0, 0), (49, 19)), fill=0)
+    txt_draw.text((50, 10), str(x), 255, font, "rm")
+    rot_txt_img = txt_img.rotate(-90, expand=True);
+    img.paste(rot_txt_img, (x-10 + origin_x, -150 + origin_y))
+
+for y in heights:
+    draw.line(((-100 + origin_x, y + origin_y), (origin_x, y + origin_y)), 128)
+    draw.text((-100 + origin_x, y + origin_y), str(y), 255, font, "rm")
+
+img.save("output.png")