+ return crops_at_page, zoom_at_page
+
+def build_single_pages_output(writer, pages_to_add, crops_at_page, zoom_at_page):
+ 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]
+ 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
+ print(f"built page number {i+1} (of {len(pages_to_add)})")
+
+def resort_pages_for_nup4(pages_to_add):
+ new_page_order = []
+ new_i_order = []
+ eight_pack = []
+ i = 0
+ n_eights = 0
+ for page in pages_to_add:
+ if i == 0:
+ eight_pack = []
+ eight_pack += [page]
+ i += 1
+ if i == 8:
+ i = 0
+ for n in PAGE_ORDER_FOR_NUP4:
+ new_i_order += [8 * n_eights + n]
+ new_page_order += [eight_pack[n]]
+ n_eights += 1
+ return new_page_order, new_i_order
+
+def nup4_inner_page_transform(page, crops, zoom, bonus_shrink_factor, printable_margin, printable_scale, nup4_position):
+ crop_left, crop_bottom, crop_right, crop_top = crops
+ page.add_transformation(pypdf.Transformation().translate(ty=(A4_HEIGHT / zoom - (A4_HEIGHT - crop_top))))
+ if nup4_position == 0 or nup4_position == 2:
+ page.add_transformation(pypdf.Transformation().translate(tx=-crop_left))
+ elif nup4_position == 1 or nup4_position == 3:
+ 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 nup4_position == 2 or nup4_position == 3:
+ page.add_transformation(pypdf.Transformation().translate(ty=-2*printable_margin/printable_scale))
+
+def nup4_outer_page_transform(page, bonus_shrink_factor, nup4_position):
+ page.add_transformation(pypdf.Transformation().translate(ty=(1-bonus_shrink_factor)*A4_HEIGHT))
+ if nup4_position == 0 or nup4_position == 1:
+ y_section = A4_HEIGHT
+ page.mediabox.bottom = A4_HALF_HEIGHT
+ page.mediabox.top = A4_HEIGHT
+ if nup4_position == 2 or nup4_position == 3:
+ y_section = 0
+ page.mediabox.bottom = 0
+ page.mediabox.top = A4_HALF_HEIGHT
+ if nup4_position == 0 or nup4_position == 2:
+ x_section = 0
+ page.mediabox.left = 0
+ page.mediabox.right = A4_HALF_WIDTH
+ if nup4_position == 1 or nup4_position == 3:
+ page.add_transformation(pypdf.Transformation().translate(tx=(1-bonus_shrink_factor)*A4_WIDTH))
+ x_section = A4_WIDTH
+ page.mediabox.left = A4_HALF_WIDTH
+ page.mediabox.right = A4_WIDTH
+ page.add_transformation(pypdf.Transformation().translate(tx=x_section, ty=y_section))
+ page.add_transformation(pypdf.Transformation().scale(QUARTER_SCALE_FACTOR, QUARTER_SCALE_FACTOR))
+
+def ornate_nup4(writer, args_analyze, is_front_page, new_page, printable_margin, printable_scale, bonus_shrink_factor, canvas_class):
+ if args_analyze:
+ # borders
+ packet = io.BytesIO()
+ c = canvas_class(packet, pagesize=A4)
+ c.setLineWidth(0.1)
+ c.line(0, A4_HEIGHT, A4_WIDTH, A4_HEIGHT)
+ c.line(0, A4_HALF_HEIGHT, A4_WIDTH, A4_HALF_HEIGHT)
+ c.line(0, 0, A4_WIDTH, 0)
+ c.line(0, A4_HEIGHT, 0, 0)
+ c.line(A4_HALF_WIDTH, A4_HEIGHT, A4_HALF_WIDTH, 0)
+ c.line(A4_WIDTH, A4_HEIGHT, A4_WIDTH, 0)
+ c.save()
+ new_pdf = pypdf.PdfReader(packet)
+ new_page.merge_page(new_pdf.pages[0])
+ printable_offset_x = printable_margin
+ printable_offset_y = printable_margin * A4_HEIGHT / A4_WIDTH
+ new_page.add_transformation(pypdf.Transformation().scale(printable_scale, printable_scale))
+ new_page.add_transformation(pypdf.Transformation().translate(tx=printable_offset_x, ty=printable_offset_y))
+ x_left_spine_limit = A4_HALF_WIDTH * bonus_shrink_factor
+ x_right_spine_limit = A4_WIDTH - x_left_spine_limit
+ if args_analyze or is_front_page:
+ packet = io.BytesIO()
+ c = canvas_class(packet, pagesize=A4)
+ if args_analyze:
+ # spine lines
+ c.setLineWidth(0.1)
+ c.line(x_left_spine_limit, A4_HEIGHT, x_left_spine_limit, 0)
+ c.line(x_right_spine_limit, A4_HEIGHT, x_right_spine_limit, 0)
+ if is_front_page:
+ c.setLineWidth(0.2)
+ draw_cut(c, x_left_spine_limit, (1))
+ draw_cut(c, x_right_spine_limit, (-1))
+ if args_analyze or is_front_page:
+ c.save()
+ new_pdf = pypdf.PdfReader(packet)
+ new_page.merge_page(new_pdf.pages[0])
+
+def draw_cut(canvas, x_spine_limit, direction):
+ outer_start_x = x_spine_limit - 0.5 * CUT_WIDTH * direction
+ inner_start_x = x_spine_limit + 0.5 * CUT_WIDTH * direction
+ middle_point_y = A4_HALF_HEIGHT + MIDDLE_POINT_DEPTH * direction
+ end_point_y = A4_HALF_HEIGHT + CUT_DEPTH * direction
+ canvas.line(inner_start_x, A4_HALF_HEIGHT, x_spine_limit, end_point_y)
+ canvas.line(x_spine_limit, end_point_y, x_spine_limit, middle_point_y)
+ canvas.line(x_spine_limit, middle_point_y, outer_start_x, A4_HALF_HEIGHT)