X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=bookmaker.py;h=3737edc6bebf019dc9ed2ba880f7f7208e09e854;hb=84b45203eace6e54962a2695f89a4193c644226d;hp=4a7ed31a6b572999e9d7d7dd6a5450d998541614;hpb=8551551339083bbba32b241e4aa53399f5051d01;p=misc diff --git a/bookmaker.py b/bookmaker.py index 4a7ed31..3737edc 100755 --- a/bookmaker.py +++ b/bookmaker.py @@ -4,17 +4,22 @@ import argparse 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 +spine_limit = 1 * 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("-s", "--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)") args = parser.parse_args() @@ -31,6 +36,7 @@ def parse_page_range(range_string, pages): return start_page, end_page pages_to_add = [] opened_files = [] +new_page_num = 0 for i, input_file in enumerate(args.input_file): file = open(input_file, 'rb') opened_files += [file] @@ -39,10 +45,11 @@ for i, input_file in enumerate(args.input_file): 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] + for old_page_num in range(start_page, end_page): + new_page_num += 1 + page = reader.pages[old_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, old_page_num+1, new_page_num)) # rotate page canvas if args.rotate: @@ -51,6 +58,7 @@ 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: @@ -62,7 +70,7 @@ for page in pages_to_add: page.mediabox.right = a4_width page.cropbox = page.mediabox -# determine page crops, zooms +# determine page crops, zooms, crop symmetry crops_at_page = [(0,0,0,0)]*len(pages_to_add) zoom_at_page = [1]*len(pages_to_add) if args.crop_range: @@ -75,7 +83,11 @@ if args.crop_range: 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 @@ -89,19 +101,21 @@ if args.crop_range: 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() if not args.nup4: + # single-page output + print("building 1-input-page-per-output-page book") odd_page = True 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 @@ -111,10 +125,9 @@ if not args.nup4: odd_page = not odd_page else: - points_per_mm = 2.83465 + print("-n: building 4-input-pages-per-output-page book") n_pages_per_axis = 2 - spine_limit = 10 - printable_margin = args.margin * points_per_mm + 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 @@ -168,15 +181,9 @@ else: 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)) @@ -238,9 +245,6 @@ else: 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 @@ -265,8 +269,9 @@ else: 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)