From: Christian Heller <c.heller@plomlompom.de>
Date: Wed, 20 Sep 2023 21:21:43 +0000 (+0200)
Subject: To DIY bookmaker add rotation handling.
X-Git-Url: https://plomlompom.com/repos/%7B%7B%20web_path%20%7D%7D/decks/%7B%7Bdb.prefix%7D%7D/static/blog?a=commitdiff_plain;h=62bedf672e025c1e8cca6dd04ce75bcbe25fbe26;p=misc

To DIY bookmaker add rotation handling.
---

diff --git a/bookmaker.py b/bookmaker.py
index 342050e..e6c8d2a 100755
--- a/bookmaker.py
+++ b/bookmaker.py
@@ -14,6 +14,7 @@ parser.add_argument("-n", "--nup4", dest="nup4", action='store_true', help="puts
 parser.add_argument("-a", "--analyze", dest="analyze", action="store_true", help="print lines identifying spine, page borders")
 parser.add_argument("-t", "--symmetry", dest="symmetry", action="store_true", help="alternate horizontal crops between odd and even pages")
 parser.add_argument("-s", "--second", dest="second", help="append second file as input to append")
+parser.add_argument("-r", "--rotate", dest="rotate", help="rotate page of number by 90°")
 args = parser.parse_args()
 
 with open(args.input_file, 'rb') as file:
@@ -44,8 +45,17 @@ with open(args.input_file, 'rb') as file:
             print("read second PDF's page number", page_num)
             page_num += 1
 
-    # normalize all pages to A4
+    # rotate page canvas
+    if args.rotate:
+        page = pages_to_add[int(args.rotate) - 1]
+        page.add_transformation(pypdf.Transformation().translate(tx=-a4_width/2, ty=-a4_height/2))
+        page.add_transformation(pypdf.Transformation().rotate(-90))
+        page.add_transformation(pypdf.Transformation().translate(tx=a4_width/2, ty=a4_height/2))
+
+    # normalize all pages to portrait A4
     for page in pages_to_add:
+        if "/Rotate" in page:
+            page.rotate(360 - page["/Rotate"])
         page.mediabox.left = 0
         page.mediabox.bottom = 0
         page.mediabox.top = a4_height