import io
from reportlab.lib.pagesizes import A4
a4_width, a4_height = A4
+points_per_cm = 10 * 72 / 25.4
+cut_depth = 1.95 * points_per_cm
+cut_width = 1.05 * points_per_cm
+middle_point_depth = 0.4 * points_per_cm
parser = argparse.ArgumentParser(description="build print-ready book PDF")
-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", 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("-i", "--input_file", action="append", required=True, help="input PDF file")
+parser.add_argument("-o", "--output_file", required=True, help="output PDF file")
+parser.add_argument("-p", "--page_range", action="append", help="page range, e.g., '3-end'")
+parser.add_argument("-c", "--crop_range", action="append", help="cm crops left, bottom, right, top – e.g., '10,10,10,10'; prefix with ':'-delimited page range to limit effect")
+parser.add_argument("-t", "--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 in mm (default 4.3)")
+parser.add_argument("-n", "--nup4", action='store_true', help="puts 4 input pages onto 1 output page")
+parser.add_argument("-a", "--analyze", action="store_true", help="in --nup4, print lines identifying spine, page borders")
+parser.add_argument("-m", "--margin", type=float, default=0.43, help="print margin for --nup4 in cm (default 0.43)")
+parser.add_argument("-s", "--spine", type=float, default=1, help="on --nup4, cm width of margin hidden in spine (default 1)")
args = parser.parse_args()
if args.page_range and len(args.page_range) > i:
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]
+ new_page_num = 0
+ for old_page_num in range(start_page, end_page):
+ new_page_num += 1
+ page = reader.pages[new_page_num]
pages_to_add += [page]
- print("read in %s page number %d" % (input_file, page_num+1))
+ print("-i, -p: read in %s page number %d as new page %d" % (input_file, new_page_num+1, new_page_num))
# rotate page canvas
if args.rotate:
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))
+ print("-r: rotating (by 90°) page", rotate)
# normalize all pages to portrait A4
for page in pages_to_add:
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(',')]
+ crop_left, crop_bottom, crop_right, crop_top = [float(x) * points_per_cm for x in crops.split(',')]
+ if args.symmetry:
+ print("-c, -t: to pages %d to %d applying crops: left %dcm, bottom %dcm, right %dcm, top %dcm (but alternating left and right crop between even and odd pages)" % (start_page + 1, end_page, crop_left, crop_bottom, crop_right, crop_top))
+ else:
+ print("-c: to pages %d to %d applying crops: left %dcm, bottom %dcm, right %dcm, top %dcm" % (start_page + 1, end_page, crop_left, crop_bottom, crop_right, crop_top))
cropped_width = a4_width - crop_left - crop_right
cropped_height = a4_height - crop_bottom - crop_top
zoom = 1
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)
+ if args.symmetry and page_num % 2:
+ crops_at_page[page_num] = (crop_right, crop_bottom, crop_left, crop_top)
+ else:
+ crops_at_page[page_num] = (crop_left, crop_bottom, crop_right, crop_top)
zoom_at_page[page_num] = zoom
writer = pypdf.PdfWriter()
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().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
odd_page = not odd_page
else:
- points_per_mm = 2.83465
n_pages_per_axis = 2
- spine_limit = 10
- printable_margin = args.margin * points_per_mm
+ spine_limit = args.spine * points_per_cm
+ printable_margin = args.margin * points_per_cm
printable_scale = (a4_width - 2*printable_margin)/a4_width
half_width = a4_width / n_pages_per_axis
half_height = a4_height / n_pages_per_axis
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:
- page.add_transformation(pypdf.Transformation().translate(tx=-crop_left))
- else:
- page.add_transformation(pypdf.Transformation().translate(tx=-crop_right))
+ page.add_transformation(pypdf.Transformation().translate(tx=-crop_left))
elif i == 1 or i == 3:
- if args.symmetry:
- page.add_transformation(pypdf.Transformation().translate(tx=(a4_width / zoom - (a4_width - crop_left))))
- else:
- page.add_transformation(pypdf.Transformation().translate(tx=(a4_width / zoom - (a4_width - crop_right))))
+ page.add_transformation(pypdf.Transformation().translate(tx=(a4_width / zoom - (a4_width - crop_right))))
page.add_transformation(pypdf.Transformation().scale(zoom * bonus_shrink_factor, zoom * bonus_shrink_factor))
if i == 2 or i == 3:
page.add_transformation(pypdf.Transformation().translate(ty=-2*printable_margin/printable_scale))
c.line(x_right_spine_limit, a4_height, x_right_spine_limit, 0)
if front_page:
c.setLineWidth(0.2)
- cut_depth = 19.5 * points_per_mm
- cut_width = 10.5 * points_per_mm
- middle_point_depth = 4 * points_per_mm
start_up_left_left_x = x_left_spine_limit - 0.5 * cut_width
start_up_left_right_x = x_left_spine_limit + 0.5 * cut_width
writer.add_page(new_page)
i = 0
front_page = not front_page
+
+# write and close
for file in opened_files:
file.close()
-
with open(args.output_file, 'wb') as output_file:
writer.write(output_file)
projects / misc / blobdiff