X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=bookmaker.py;h=d9bf685c0967a492d941b15e25bcd9af6a720751;hb=5206a79c96848191646c6c73d3af82dceb947fe0;hp=2211b848460d83aabc41f9bd89209e4c2b63be49;hpb=62a5f685da1cbfc256b712d6c0b1222cf19ec1ea;p=misc diff --git a/bookmaker.py b/bookmaker.py index 2211b84..d9bf685 100755 --- a/bookmaker.py +++ b/bookmaker.py @@ -8,18 +8,18 @@ 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_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("-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("-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() @@ -36,6 +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] @@ -44,10 +45,20 @@ 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)) + +# if necessary, pad pages to multiple of 8 +if args.nup4: + mod_to_8 = len(pages_to_add) % 8 + if mod_to_8 > 0: + print("-n: number of input pages %d not multiple of 8, padding to that" % len(pages_to_add)) + for _ in range(8 - mod_to_8): + new_page = pypdf.PageObject.create_blank_page(width=a4_width, height=a4_height) + pages_to_add += [new_page] # rotate page canvas if args.rotate: @@ -56,6 +67,7 @@ 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: @@ -67,7 +79,7 @@ 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: @@ -80,7 +92,15 @@ 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) * points_per_cm for x in crops.split(',')] + crop_left_cm, crop_bottom_cm, crop_right_cm, crop_top_cm = [float(x) for x in crops.split(',')] + crop_left = crop_left_cm * points_per_cm + crop_bottom = crop_bottom_cm * points_per_cm + crop_right = crop_right_cm * points_per_cm + crop_top = crop_top_cm * points_per_cm + if args.symmetry: + print("-c, -t: to pages %d to %d applying crops: left %.2fcm, bottom %.2fcm, right %.2fcm, top %.2fcm (but alternating left and right crop between even and odd pages)" % (start_page + 1, end_page, crop_left_cm, crop_bottom_cm, crop_right_cm, crop_top_cm)) + else: + print("-c: to pages %d to %d applying crops: left %.2fcm, bottom %.2fcm, right %.2fcm, top %.2fcm" % (start_page + 1, end_page, crop_left_cm, crop_bottom_cm, crop_right_cm, crop_top_cm)) cropped_width = a4_width - crop_left - crop_right cropped_height = a4_height - crop_bottom - crop_top zoom = 1 @@ -94,19 +114,21 @@ 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 @@ -114,10 +136,14 @@ if not args.nup4: page.mediabox.top = cropped_height * zoom writer.add_page(page) odd_page = not odd_page + print("built page number %d (of %d)" % (i+1, len(pages_to_add))) else: + print("-n: building 4-input-pages-per-output-page book") + print("-m: applying printable-area margin of %.2fcm" % args.margin) + if args.analyze: + print("-a: drawing page borders, spine limits") n_pages_per_axis = 2 - 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 @@ -128,11 +154,6 @@ else: new_page_order = [] new_i_order = [] eight_pack = [] - mod_to_8 = len(pages_to_add) % 8 - if mod_to_8 > 0: - for _ in range(8 - mod_to_8): - 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: @@ -172,15 +193,9 @@ 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)) @@ -208,7 +223,7 @@ else: page.add_transformation(pypdf.Transformation().scale(section_scale_factor, section_scale_factor)) new_page.merge_page(page) page_count += 1 - print("merged page number", page_count) + print("merged page number %d (of %d)" % (page_count, len(pages_to_add))) i += 1 if i > 3: from reportlab.pdfgen import canvas @@ -266,8 +281,9 @@ 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)