markup: process Documents inklist annotations

markup/img.py

@@ -110,3 +110,22 @@ def write_debug_image(workdir, page_num, prods, scribbles):
 
     img.save(path)
     set_file_perms(path)
+
+
+def write_inklist(obj, path):
+    """Draw an image of the inklist."""
+    pagew = int(11*72)
+    pageh = int(8.5*72)
+
+    img = Image.new('RGBA', (pagew, pageh), (0, 0, 0, 0))
+    draw = ImageDraw.Draw(img, 'RGBA')
+
+    for segment in obj['InkList']:
+        draw.line(segment, 'black', 3)
+
+    # account for the difference in coordinate systems
+    # between pdf and images.
+    img = img.transpose(Image.FLIP_TOP_BOTTOM)
+
+    img.save(path)
+    set_file_perms(path)