parser.add_argument("-i", "--input", dest="input_file", action="append", required=True, help="input PDF file")
parser.add_argument("-o", "--output", dest="output_file", required=True, help="output PDF file")
parser.add_argument("-p", "--pages", dest="page_range", action="append", help="page range, e.g., '3-end'")
-parser.add_argument("-c", "--crop", dest="crop_range", help="crops left, bottom, right, top – e.g., '10,10,10,10'")
+parser.add_argument("-c", "--crop", dest="crop_range", action="append", help="crops left, bottom, right, top – e.g., '10,10,10,10'; prefix with ':'-delimited page range to limit effect")
parser.add_argument("-n", "--nup4", dest="nup4", action='store_true', help="puts 4 input pages onto 1 output page")
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("-r", "--rotate", dest="rotate", type=int, action="append", help="rotate page of number by 90° (usable multiple times on same page!)")
-parser.add_argument("-m", "--margin", type=float, default=4.3, help="print margin (default 4.3)")
+parser.add_argument("-m", "--margin", type=float, default=4.3, help="print margin in mm (default 4.3)")
args = parser.parse_args()
# select pages from input files
+def parse_page_range(range_string, pages):
+ start_page = 0
+ end_page = len(pages)
+ if range_string:
+ start, end = range_string.split('-')
+ if not (len(start) == 0 or start == "start"):
+ start_page = int(start) - 1
+ if not (len(end) == 0 or end == "end"):
+ end_page = int(end)
+ return start_page, end_page
pages_to_add = []
opened_files = []
for i, input_file in enumerate(args.input_file):
file = open(input_file, 'rb')
opened_files += [file]
reader = pypdf.PdfReader(file)
- start_page = 0
- end_page = len(reader.pages)
+ range_string = None
if args.page_range and len(args.page_range) > i:
- start, end = args.page_range[i].split('-')
- if not (len(start) == 0 or start == "start"):
- start_page = int(start) - 1
- if not (len(end) == 0 or end == "end"):
- end_page = int(end)
+ range_string = args.page_range[i]
+ start_page, end_page = parse_page_range(range_string, reader.pages)
for page_num in range(start_page, end_page):
page = reader.pages[page_num]
pages_to_add += [page]
page.mediabox.right = a4_width
page.cropbox = page.mediabox
-# determine page crop
-crop_left, crop_bottom, crop_right, crop_top = 0, 0, 0, 0
+# determine page crops, zooms
+crops_at_page = [(0,0,0,0)]*len(pages_to_add)
+zoom_at_page = [1]*len(pages_to_add)
if args.crop_range:
- crop_left, crop_bottom, crop_right, crop_top = [float(x) for x in args.crop_range.split(',')]
-cropped_width = a4_width - crop_left - crop_right
-cropped_height = a4_height - crop_bottom - crop_top
-zoom = 1
-if args.crop_range:
- zoom_horizontal = a4_width / (a4_width - crop_left - crop_right)
- zoom_vertical = a4_height / (a4_height - crop_bottom - crop_top)
- if (zoom_horizontal > 1 and zoom_vertical < 1) or (zoom_horizontal < 1 and zoom_vertical > 1):
- print("Error: opposing zooms.")
- exit(1)
- elif zoom_horizontal + zoom_vertical > 2:
- zoom = min(zoom_horizontal, zoom_vertical)
- else:
- zoom = max(zoom_horizontal, zoom_vertical)
+ for crop_range in args.crop_range:
+ initial_split = crop_range.split(':')
+ if len(initial_split) > 1:
+ page_range = initial_split[0]
+ crops = initial_split[1]
+ else:
+ page_range = None
+ crops = initial_split[0]
+ start_page, end_page = parse_page_range(page_range, pages_to_add)
+ crop_left, crop_bottom, crop_right, crop_top = [float(x) for x in crops.split(',')]
+ cropped_width = a4_width - crop_left - crop_right
+ cropped_height = a4_height - crop_bottom - crop_top
+ zoom = 1
+ zoom_horizontal = a4_width / (a4_width - crop_left - crop_right)
+ zoom_vertical = a4_height / (a4_height - crop_bottom - crop_top)
+ if (zoom_horizontal > 1 and zoom_vertical < 1) or (zoom_horizontal < 1 and zoom_vertical > 1):
+ print("Error: opposing zooms.")
+ exit(1)
+ elif zoom_horizontal + zoom_vertical > 2:
+ zoom = min(zoom_horizontal, zoom_vertical)
+ else:
+ zoom = max(zoom_horizontal, zoom_vertical)
+ for page_num in range(start_page, end_page):
+ crops_at_page[page_num] = (crop_left, crop_bottom, crop_right, crop_top)
+ zoom_at_page[page_num] = zoom
writer = pypdf.PdfWriter()
if not args.nup4:
odd_page = True
- for page in pages_to_add:
+ for i, page in enumerate(pages_to_add):
+ crop_left, crop_bottom, crop_right, crop_top = crops_at_page[i]
+ zoom = zoom_at_page[i]
if args.symmetry and odd_page:
page.add_transformation(pypdf.Transformation().translate(tx=-crop_right, ty=-crop_bottom))
else:
page.add_transformation(pypdf.Transformation().translate(tx=-crop_left, ty=-crop_bottom))
page.add_transformation(pypdf.Transformation().scale(zoom, zoom))
+ cropped_width = a4_width - crop_left - crop_right
+ cropped_height = a4_height - crop_bottom - crop_top
page.mediabox.right = cropped_width * zoom
page.mediabox.top = cropped_height * zoom
writer.add_page(page)
odd_page = not odd_page
+
else:
- n_pages_per_axis = 2
points_per_mm = 2.83465
+ n_pages_per_axis = 2
+ spine_limit = 10
printable_margin = args.margin * points_per_mm
printable_scale = (a4_width - 2*printable_margin)/a4_width
- spine_limit = 10 * points_per_mm
half_width = a4_width / n_pages_per_axis
half_height = a4_height / n_pages_per_axis
section_scale_factor = 1 / n_pages_per_axis
spine_part_of_page = (spine_limit / half_width) / printable_scale
bonus_shrink_factor = 1 - spine_part_of_page
new_page_order = []
+ new_i_order = []
eight_pack = []
mod_to_8 = len(pages_to_add) % 8
if mod_to_8 > 0:
new_page = pypdf.PageObject.create_blank_page(width=a4_width, height=a4_height)
pages_to_add += [new_page]
i = 0
+ n_eights = 0
for page in pages_to_add:
if i == 0:
eight_pack = []
i += 1
if i == 8:
i = 0
+ new_i_order += [8 * n_eights + 3,
+ 8 * n_eights + 0,
+ 8 * n_eights + 7,
+ 8 * n_eights + 4,
+ 8 * n_eights + 1,
+ 8 * n_eights + 2,
+ 8 * n_eights + 5,
+ 8 * n_eights + 6]
+ n_eights += 1
new_page_order += [eight_pack[3]] # page front, upper left
new_page_order += [eight_pack[0]] # page front, upper right
new_page_order += [eight_pack[7]] # page front, lower left
i = 0
page_count = 0
front_page = True
- for page in new_page_order:
+ for j, page in enumerate(new_page_order):
if i == 0:
new_page = pypdf.PageObject.create_blank_page(width=a4_width, height=a4_height)
# in-section transformations: align pages on top, left-hand pages to left, right-hand to right
+ new_i = new_i_order[j]
+ crop_left, crop_bottom, crop_right, crop_top = crops_at_page[new_i]
+ zoom = zoom_at_page[new_i]
page.add_transformation(pypdf.Transformation().translate(ty=(a4_height / zoom - (a4_height - crop_top))))
if i == 0 or i == 2:
if args.symmetry: