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plakativ/plakativ.py

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# Plakativ allows to create posters bigger than the page size one's own printer
# is able to print on by enlarging the input PDF, cutting it into smaller
# pieces and putting each of them onto a paper size that can be printed
# normally. The result can then be glued together into a bigger poster.
#
# Copyright (C) 2019 Johannes 'josch' Schauer
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License version 3 as published by the
# Free Software Foundation.
from collections import OrderedDict
import math
import fitz
import sys
import argparse
import os.path
import platform
from enum import Enum
from io import BytesIO
import logging
have_img2pdf = True
try:
import img2pdf
except ImportError:
have_img2pdf = False
have_tkinter = True
try:
import tkinter
import tkinter.filedialog
import tkinter.messagebox
except ImportError:
have_tkinter = False
class dummy:
def __init__(self, *args, **kwargs):
raise Exception("this functionality needs tkinter")
tkinter = type("", (), {})()
tkinter.Frame = dummy
tkinter.Menubutton = dummy
tkinter.LabelFrame = dummy
VERSION = "0.3"
PAGE_SIZES = OrderedDict(
[
("custom", (None, None)),
("A0 (841 mm × 1189 mm)", (841, 1189)),
("A1 (594 mm × 841 mm)", (594, 841)),
("A2 (420 mm × 594 mm)", (420, 594)),
("A3 (297 mm × 420 mm)", (297, 420)),
("A4 (210 mm × 297 mm)", (210, 297)),
("A5 (148 mm × 210 mm)", (148, 210)),
("Letter (8.5 in × 11 in)", (215.9, 279.4)),
("Legal (8.5 in × 14 in)", (215.9, 355.6)),
("Tabloid (11 in × 17 in)", (279.4, 431.8)),
]
)
papersizes = {
"letter": "8.5inx11in",
"a0": "841mmx1189mm",
"a1": "594mmx841mm",
"a2": "420mmx594mm",
"a3": "297mmx420mm",
"a4": "210mmx297mm",
"a5": "148mmx210mm",
"a6": "105mmx148mm",
"legal": "8.5inx14in",
"tabloid": "11inx17in",
}
papernames = {
"letter": "Letter",
"a0": "A0",
"a1": "A1",
"a2": "A2",
"a3": "A3",
"a4": "A4",
"a5": "A5",
"a6": "A6",
"legal": "Legal",
"tabloid": "Tabloid",
}
Unit = Enum("Unit", "pt cm mm inch")
def mm_to_pt(length):
return (72.0 * length) / 25.4
def cm_to_mm(length):
return length * 10.0
def in_to_mm(length):
return length / 25.4
def pt_to_mm(length):
return (25.4 * length) / 72.0
class PlakativException(Exception):
pass
class PageNrOutOfRangeException(PlakativException):
pass
class LayoutNotComputedException(PlakativException):
pass
def simple_cover(n, m, x, y):
pages_x_portrait = math.ceil(n / x)
pages_y_portrait = math.ceil(m / y)
pages_x_landscape = math.ceil(n / y)
pages_y_landscape = math.ceil(m / x)
if pages_x_portrait * pages_y_portrait <= pages_x_landscape * pages_y_landscape:
pages_x = pages_x_portrait
pages_y = pages_y_portrait
portrait = True
size = pages_x * x, pages_y * y
else:
pages_x = pages_x_landscape
pages_y = pages_y_landscape
portrait = False
size = pages_x * y, pages_y * x
config = list()
for py in range(pages_y):
for px in range(pages_x):
if portrait:
posx = px * x
posy = py * y
else:
posx = px * y
posy = py * x
config.append((posx, posy, portrait))
return config, size
# the function complex_cover() is based on a heuristic proposed by
# stackoverflow user m69 https://stackoverflow.com/users/4907604/m69 as a reply
# to this question https://stackoverflow.com/questions/39306507
#
# In addition to computing the number of required rectangles it also returns
# the position of the rectangles.
#
# In contrast to the solution by m69 this algorithm mandates at least one page
# in each corner of the result. This means that the minimum solution size is
# four. The advantage is, that the layout computed by this algorithm will
# always be completely be inside the poster without leaving the poster area.
# This in turn will make assembling the poster easier.
#
# This heuristic is not optimal. We always use a regular simple cover for the
# hole in the center (if it exists) but there are situations where the hole in
# the center should be covered by a complex cover instead. We do not consider
# this improvement because:
# - it's required very seldom
# - it makes the resulting layout more complicated to glue together
# - there is no proof that the improved version is optimal either
# - we save some cpu cycles
def complex_cover(n, m, x, y):
# each tuple-entry represents one of the corners of the poster
# upper-left, upper-right, lower-right, lower-left
portrait = (
(True, True, True, False),
(True, True, False, False),
(True, False, True, False),
(True, False, False, True),
(True, False, False, False),
)
X = lambda r, d: x if portrait[r][d] else y
Y = lambda r, d: y if portrait[r][d] else x
if x == y:
# if page sizes are square, only one rotation has to be checked
num_rotations = 1
elif n == m:
# if the poster size is a square, rotation 4 and 5 (which are itself
# just rotations of rotations 2 and 1, respectively) do not need to be
# checked
num_rotations = 3
else:
num_rotations = 5
minimum = math.ceil((n * m) / (x * y))
config, _ = simple_cover(n, m, x, y)
cover = len(config)
if cover == minimum:
return config
for r in range(num_rotations):
# w0 -> width of upper left corner pages
for w0 in range(1, math.ceil(n / X(r, 0))):
# w1 -> width of upper right corner pages
w1 = math.ceil((n - w0 * X(r, 0)) / X(r, 1))
if w1 < 0:
w1 = 0
# h0 -> height of upper left corner pages
for h0 in range(1, math.ceil(m / Y(r, 0))):
# h3 -> height of lower left corner pages
h3 = math.ceil((m - h0 * Y(r, 0)) / Y(r, 3))
if h3 < 0:
h3 = 0
# w2 -> width of lower right corner pages
for w2 in range(1, math.ceil(n / X(r, 2))):
# w3 -> width of lower left corner pages
w3 = math.ceil((n - w2 * X(r, 2)) / X(r, 3))
if w3 < 0:
w3 = 0
# h2 -> height of lower right corner pages
for h2 in range(1, math.ceil(m / Y(r, 2))):
# h1 -> height of upper right corner pages
h1 = math.ceil((m - h2 * Y(r, 2)) / Y(r, 1))
if h1 < 0:
h1 = 0
newconfig = list()
# upper-left (w0,h0)
for i in range(w0):
for j in range(h0):
newconfig.append(
(i * X(r, 0), j * Y(r, 0), portrait[r][0])
)
# upper-right (w1,h1)
for i in range(w1):
for j in range(h1):
newconfig.append(
(
n - w1 * X(r, 1) + i * X(r, 1),
j * Y(r, 1),
portrait[r][1],
)
)
# lower-right (w2,h2)
for i in range(w2):
for j in range(h2):
newconfig.append(
(
n - w2 * X(r, 2) + i * X(r, 2),
m - h2 * Y(r, 2) + j * Y(r, 2),
portrait[r][2],
)
)
# lower-left (w3,h3)
for i in range(w3):
for j in range(h3):
newconfig.append(
(
i * X(r, 3),
m - h3 * Y(r, 3) + j * Y(r, 3),
portrait[r][3],
)
)
# if neither rectangle 0 overlaps with rectangle 2 nor
# does rectangle 1 overlap with rectangle 3 in the center,
# then a center cover has to be added
X4 = n - w0 * X(r, 0) - w2 * X(r, 2)
Y4 = m - h1 * Y(r, 1) - h3 * Y(r, 3)
simple_config = []
if X4 > 0 and Y4 > 0:
simple_config, (sx, sy) = simple_cover(X4, Y4, x, y)
# shift the results such that they are in the center
for (cx, cy, p) in simple_config:
newconfig.append(
(
w0 * X(r, 0) + (X4 - sx) / 2 + cx,
h1 * Y(r, 1) + (Y4 - sy) / 2 + cy,
p,
)
)
else:
X4 = n - w1 * X(r, 1) - w3 * X(r, 3)
Y4 = m - h0 * Y(r, 0) - h2 * Y(r, 2)
if X4 > 0 and Y4 > 0:
simple_config, (sx, sy) = simple_cover(X4, Y4, x, y)
# shift the results such that they are in the center
for (cx, cy, p) in simple_config:
newconfig.append(
(
w3 * X(r, 3) + (X4 - sx) / 2 + cx,
h0 * Y(r, 0) + (Y4 - sy) / 2 + cy,
p,
)
)
total = len(newconfig)
# shortcut to cut computation short in case a
# solution with the minimal possible number of
# pages is found
if total == minimum:
return newconfig
if total < cover:
cover = total
config = newconfig
return config
class Plakativ:
def __init__(self, doc=None, pagenr=0):
self.doc = doc
if self.doc is None:
# either we didn't have img2pdf or opening the input with img2pdf
# failed
if hasattr(infile, "read"):
self.doc = fitz.open(stream=infile, filetype="application/pdf")
else:
self.doc = fitz.open(filename=infile)
self.pagenr = pagenr
# set page number -- first page is 0
def set_input_pagenr(self, pagenr):
if pagenr < 0 or pagenr >= len(self.doc):
raise PageNrOutOfRangeException(
"%d is not between 0 and %d (inclusive)" % (pagenr, len(self.doc))
)
self.pagenr = pagenr
def get_input_pagenums(self):
return len(self.doc)
def get_input_page_size(self):
width = self.doc[self.pagenr].getDisplayList().rect.width
height = self.doc[self.pagenr].getDisplayList().rect.height
return (width, height)
def get_image(self, zoom):
mat_0 = fitz.Matrix(zoom, zoom)
pix = (
self.doc[self.pagenr].getDisplayList().getPixmap(matrix=mat_0, alpha=False)
)
# the getImageData() function was only introduced in pymupdf 1.14.5
if hasattr(pix, "getImageData"):
return pix.getImageData("ppm")
else:
# this is essentially the same thing that the getImageData()
# function does
return pix._getImageData(2) # 2 stands for pgm/ppm/pbm
def compute_layout(
self,
mode,
postersize=None,
mult=None,
npages=None,
pagesize=(210, 297),
border=(0, 0, 0, 0),
strategy="simple",
):
border_top, border_right, border_bottom, border_left = border
self.layout = {
"output_pagesize": pagesize,
"border_top": border_top,
"border_right": border_right,
"border_bottom": border_bottom,
"border_left": border_left,
}
printable_width = self.layout["output_pagesize"][0] - (
border_left + border_right
)
printable_height = self.layout["output_pagesize"][1] - (
border_top + border_bottom
)
inpage_width = pt_to_mm(self.doc[self.pagenr].getDisplayList().rect.width)
inpage_height = pt_to_mm(self.doc[self.pagenr].getDisplayList().rect.height)
if mode in ["size", "mult"]:
if mode == "size":
# fit the input page size into the selected postersize
width_portrait = postersize[0]
height_portrait = (width_portrait * inpage_height) / inpage_width
if height_portrait > postersize[1]:
height_portrait = postersize[1]
width_portrait = (height_portrait * inpage_width) / inpage_height
area_portrait = width_portrait * height_portrait
width_landscape = postersize[1]
height_landscape = (width_landscape * inpage_height) / inpage_width
if height_landscape > postersize[0]:
height_landscape = postersize[0]
width_landscape = (height_landscape * inpage_width) / inpage_height
area_landscape = width_landscape * height_landscape
if area_portrait > area_landscape:
poster_width, poster_height = width_portrait, height_portrait
else:
poster_width, poster_height = width_landscape, height_landscape
elif mode == "mult":
area = inpage_width * inpage_height * mult
poster_width = math.sqrt(area * inpage_width / inpage_height)
poster_height = math.sqrt(area * inpage_height / inpage_width)
else:
raise Exception("unsupported mode: %s" % mode)
elif mode == "npages":
# stupid bruteforce algorithm to determine the largest printable
# postersize with N pages
best_area = 0
best = None
for x in range(1, npages + 1):
for y in range(1, npages + 1):
if x * y > npages:
continue
width_portrait = x * printable_width
height_portrait = y * printable_height
poster_width = width_portrait
poster_height = (poster_width * inpage_height) / inpage_width
if poster_height > height_portrait:
poster_height = height_portrait
poster_width = (poster_height * inpage_width) / inpage_height
area_portrait = poster_width * poster_height
if area_portrait > best_area:
best_area = area_portrait
best = (poster_width, poster_height)
width_landscape = x * printable_height
height_landscape = y * printable_width
poster_width = width_landscape
poster_height = (poster_width * inpage_height) / inpage_width
if poster_height > height_landscape:
poster_height = height_landscape
poster_width = (poster_height * inpage_width) / inpage_height
area_landscape = poster_width * poster_height
if area_landscape > best_area:
best_area = area_landscape
best = (poster_width, poster_height)
poster_width, poster_height = best
if strategy == "complex":
# bisect poster sizes until we find the largest size that can
# be printed given the available number of pages
# we already know the maximum size for a solution utilizing the
# simple cover algorithm, so this will be the minimum known
# poster size
min_area_mult = (poster_width * poster_height) / (
inpage_width * inpage_height
)
# to avoid floating point errors later
min_area_mult *= 0.9999
min_area_npages = len(
complex_cover(
poster_width, poster_height, printable_width, printable_height
)
)
# the maximum possible size is a poster of the area created by
# multiplying the individual page areas by the maximum number
# of pages available
max_area_mult = (npages * printable_width * printable_height) / (
inpage_width * inpage_height
)
max_area_npages = len(
complex_cover(
math.sqrt(max_area_mult) * inpage_width,
math.sqrt(max_area_mult) * inpage_height,
printable_width,
printable_height,
)
)
while True:
if abs(min_area_mult - max_area_mult) < 0.001:
break
new_area_mult = (min_area_mult + max_area_mult) / 2
new_area_npages = len(
complex_cover(
math.sqrt(new_area_mult) * inpage_width,
math.sqrt(new_area_mult) * inpage_height,
printable_width,
printable_height,
)
)
if new_area_npages > npages:
max_area_mult = new_area_mult
else:
min_area_mult = new_area_mult
poster_width = inpage_width * math.sqrt(min_area_mult)
poster_height = inpage_height * math.sqrt(min_area_mult)
else:
raise Exception("unsupported mode: %s" % mode)
pages_x_portrait = math.ceil(poster_width / printable_width)
pages_y_portrait = math.ceil(poster_height / printable_height)
pages_x_landscape = math.ceil(poster_width / printable_height)
pages_y_landscape = math.ceil(poster_height / printable_width)
portrait = True
if pages_x_portrait * pages_y_portrait > pages_x_landscape * pages_y_landscape:
portrait = False
if portrait:
pages_x = pages_x_portrait
pages_y = pages_y_portrait
else:
pages_x = pages_x_landscape
pages_y = pages_y_landscape
# size of the bounding box of all pages after they have been glued together
if portrait:
self.layout["overallsize"] = (
pages_x * printable_width + (border_right + border_left),
pages_y * printable_height + (border_top + border_bottom),
)
else:
self.layout["overallsize"] = (
pages_x * printable_height + (border_top + border_bottom),
pages_y * printable_width + (border_right + border_left),
)
# position of the poster relative to upper left corner of layout["overallsize"]
if portrait:
self.layout["posterpos"] = (
border_left + (pages_x * printable_width - poster_width) / 2,
border_top + (pages_y * printable_height - poster_height) / 2,
)
else:
self.layout["posterpos"] = (
border_bottom + (pages_x * printable_height - poster_width) / 2,
border_right + (pages_y * printable_width - poster_height) / 2,
)
# positions are relative to self.layout["posterpos"]
self.layout["positions"] = []
for y in range(pages_y):
for x in range(pages_x):
if portrait:
posx = (
x * printable_width
- (pages_x * printable_width - poster_width) / 2
)
posy = (
y * printable_height
- (pages_y * printable_height - poster_height) / 2
)
else:
posx = (
x * printable_height
- (pages_x * printable_height - poster_width) / 2
)
posy = (
y * printable_width
- (pages_y * printable_width - poster_height) / 2
)
self.layout["positions"].append((posx, posy, portrait))
if strategy == "complex":
positions_complex = complex_cover(
poster_width, poster_height, printable_width, printable_height
)
if len(positions_complex) < len(self.layout["positions"]):
self.layout["positions"] = positions_complex
# figure out the borders around the final poster by analyzing
# the computed positions and storing the largest border size in
# each dimension
poster_top = poster_right = poster_bottom = poster_left = 0
for (posx, posy, p) in self.layout["positions"]:
if p:
top = posy - border_top
if top < 0 and -top > poster_top:
poster_top = -top
right = posx + printable_width + border_right - poster_width
if right > 0 and right > poster_right:
poster_right = right
bottom = posy + printable_height + border_bottom - poster_height
if bottom > 0 and bottom > poster_bottom:
poster_bottom = bottom
left = posx - border_left
if left < 0 and -left > poster_left:
poster_left = -left
else:
top = posy - border_left
if top < 0 and -top > poster_top:
poster_top = -top
right = posx + printable_height + border_top - poster_width
if right > 0 and right > poster_right:
poster_right = right
bottom = posy + printable_width + border_right - poster_height
if bottom > 0 and bottom > poster_bottom:
poster_bottom = bottom
left = posx - border_bottom
if left < 0 and -left > poster_left:
poster_left = -left
self.layout["overallsize"] = (
poster_width + poster_left + poster_right,
poster_height + poster_top + poster_bottom,
)
self.layout["posterpos"] = (poster_left, poster_top)
# size of output poster is always proportional to size of input page
self.layout["postersize"] = poster_width, poster_height
if mode == "size":
mult = (poster_width * poster_height) / (inpage_width * inpage_height)
npages = len(self.layout["positions"])
elif mode == "mult":
postersize = poster_width, poster_height
npages = len(self.layout["positions"])
elif mode == "npages":
postersize = poster_width, poster_height
mult = (poster_width * poster_height) / (inpage_width * inpage_height)
else:
raise Exception("unsupported mode: %s" % mode)
return postersize, mult, npages
def render(self, outfile, cover=False, guides=False, numbers=False, border=False):
if not hasattr(self, "layout"):
raise LayoutNotComputedException()
inpage_width = pt_to_mm(self.doc[self.pagenr].getDisplayList().rect.width)
outdoc = fitz.open()
if cover:
# factor to convert from output poster dimensions (given in mm) into
# pdf dimensions (given in pt)
zoom_1 = min(
mm_to_pt(
self.layout["output_pagesize"][0]
- 2 * max(self.layout["border_left"], self.layout["border_right"])
)
/ (self.layout["overallsize"][0]),
mm_to_pt(
self.layout["output_pagesize"][1]
- 2 * max(self.layout["border_top"], self.layout["border_bottom"])
)
/ (self.layout["overallsize"][1]),
)
page = outdoc.newPage(
-1, # insert after last page
width=mm_to_pt(self.layout["output_pagesize"][0]),
height=mm_to_pt(self.layout["output_pagesize"][1]),
)
for i, (x, y, portrait) in enumerate(self.layout["positions"]):
x0 = (x + self.layout["posterpos"][0]) * zoom_1 + (
mm_to_pt(self.layout["output_pagesize"][0])
- zoom_1 * self.layout["overallsize"][0]
) / 2
y0 = (y + self.layout["posterpos"][1]) * zoom_1 + (
mm_to_pt(self.layout["output_pagesize"][1])
- zoom_1 * self.layout["overallsize"][1]
) / 2
if portrait:
page_width = self.layout["output_pagesize"][0] * zoom_1
page_height = self.layout["output_pagesize"][1] * zoom_1
top = self.layout["border_top"] * zoom_1
right = self.layout["border_right"] * zoom_1
bottom = self.layout["border_bottom"] * zoom_1
left = self.layout["border_left"] * zoom_1
else:
# page is rotated 90 degrees clockwise
page_width = self.layout["output_pagesize"][1] * zoom_1
page_height = self.layout["output_pagesize"][0] * zoom_1
top = self.layout["border_left"] * zoom_1
right = self.layout["border_top"] * zoom_1
bottom = self.layout["border_right"] * zoom_1
left = self.layout["border_bottom"] * zoom_1
# inner rectangle
shape = page.newShape()
shape.drawRect(
fitz.Rect(
x0,
y0,
x0 + page_width - left - right,
y0 + page_height - top - bottom,
)
)
shape.finish(color=(0, 0, 1))
# outer rectangle
shape.drawRect(
fitz.Rect(
x0 - left,
y0 - top,
x0 - left + page_width,
y0 - top + page_height,
)
)
shape.finish(color=(1, 0, 0))
shape.insertTextbox(
fitz.Rect(
x0 + 5,
y0 + 5,
x0 + page_width - left - right - 5,
y0 + page_height - top - bottom - 5,
),
"%d" % (i + 1),
fontsize=20,
color=(0, 0, 0),
)
shape.commit()
for i, (x, y, portrait) in enumerate(self.layout["positions"]):
if portrait:
page_width = mm_to_pt(self.layout["output_pagesize"][0])
page_height = mm_to_pt(self.layout["output_pagesize"][1])
else:
page_width = mm_to_pt(self.layout["output_pagesize"][1])
page_height = mm_to_pt(self.layout["output_pagesize"][0])
page = outdoc.newPage(
-1, width=page_width, height=page_height # insert after last page
)
if portrait:
target_x = x - self.layout["border_left"]
target_y = y - self.layout["border_top"]
target_width = self.layout["output_pagesize"][0]
target_height = self.layout["output_pagesize"][1]
else:
target_x = x - self.layout["border_bottom"]
target_y = y - self.layout["border_left"]
target_width = self.layout["output_pagesize"][1]
target_height = self.layout["output_pagesize"][0]
target_xoffset = 0
target_yoffset = 0
if target_x < 0:
target_xoffset = -target_x
target_width += target_x
target_x = 0
if target_y < 0:
target_yoffset = -target_y
target_height += target_y
target_y = 0
if target_x + target_width > self.layout["postersize"][0]:
target_width = self.layout["postersize"][0] - target_x
if target_y + target_height > self.layout["postersize"][1]:
target_height = self.layout["postersize"][1] - target_y
targetrect = fitz.Rect(
mm_to_pt(target_xoffset),
mm_to_pt(target_yoffset),
mm_to_pt(target_xoffset + target_width),
mm_to_pt(target_yoffset + target_height),
)
factor = inpage_width / self.layout["postersize"][0]
sourcerect = fitz.Rect(
mm_to_pt(factor * target_x),
mm_to_pt(factor * target_y),
mm_to_pt(factor * (target_x + target_width)),
mm_to_pt(factor * (target_y + target_height)),
)
page.showPDFpage(
targetrect, # fill the whole page
self.doc, # input document
self.pagenr, # input page number
clip=sourcerect, # part of the input page to use
)
shape = page.newShape()
if guides:
if portrait:
shape.drawRect(
fitz.Rect(
mm_to_pt(self.layout["border_left"]),
mm_to_pt(self.layout["border_top"]),
page_width - mm_to_pt(self.layout["border_right"]),
page_height - mm_to_pt(self.layout["border_bottom"]),
)
)
else:
shape.drawRect(
fitz.Rect(
mm_to_pt(self.layout["border_bottom"]),
mm_to_pt(self.layout["border_left"]),
page_width - mm_to_pt(self.layout["border_top"]),
page_height - mm_to_pt(self.layout["border_right"]),
)
)
shape.finish(width=0.2, color=(0.5, 0.5, 0.5), dashes="[5 6 1 6] 0")
if numbers:
if portrait:
shape.insertTextbox(
fitz.Rect(
mm_to_pt(self.layout["border_left"]) + 5,
mm_to_pt(self.layout["border_top"]) + 5,
page_width - mm_to_pt(self.layout["border_right"]) - 5,
page_height - mm_to_pt(self.layout["border_bottom"]) - 5,
),
"%d" % (i + 1),
fontsize=8,
color=(0.5, 0.5, 0.5),
)
else:
shape.insertTextbox(
fitz.Rect(
mm_to_pt(self.layout["border_bottom"]) + 5,
mm_to_pt(self.layout["border_left"]) + 5,
page_width - mm_to_pt(self.layout["border_top"]) - 5,
page_height - mm_to_pt(self.layout["border_right"]) - 5,
),
"%d" % (i + 1),
fontsize=8,
color=(0.5, 0.5, 0.5),
)
if border:
if portrait:
shape.drawRect(
fitz.Rect(
mm_to_pt(self.layout["border_left"] - x),
mm_to_pt(self.layout["border_top"] - y),
mm_to_pt(
self.layout["border_left"]
- x
+ self.layout["postersize"][0]
),
mm_to_pt(
self.layout["border_top"]
- y
+ self.layout["postersize"][1]
),
)
)
else:
shape.drawRect(
fitz.Rect(
mm_to_pt(self.layout["border_bottom"] - x),
mm_to_pt(self.layout["border_left"] - y),
mm_to_pt(
self.layout["border_bottom"]
- x
+ self.layout["postersize"][0]
),
mm_to_pt(
self.layout["border_left"]
- y
+ self.layout["postersize"][1]
),
)
)
shape.finish(width=0.2, color=(0.5, 0.5, 0.5), dashes="[1 1] 0")
shape.commit()
if hasattr(outfile, "write"):
# outfile is an object with a write() method
outfile.write(outdoc.write(garbage=4, deflate=True))
else:
# outfile is used as a filename
outdoc.save(outfile, garbage=4, deflate=True)
# from Python 3.7 Lib/idlelib/configdialog.py
# Copyright 2015-2017 Terry Jan Reedy
# Python License
class VerticalScrolledFrame(tkinter.Frame):
"""A pure Tkinter vertically scrollable frame.
* Use the 'interior' attribute to place widgets inside the scrollable frame
* Construct and pack/place/grid normally
* This frame only allows vertical scrolling
"""
def __init__(self, parent, *args, **kw):
tkinter.Frame.__init__(self, parent, *args, **kw)
# Create a canvas object and a vertical scrollbar for scrolling it.
vscrollbar = tkinter.Scrollbar(self, orient=tkinter.VERTICAL)
vscrollbar.pack(fill=tkinter.Y, side=tkinter.RIGHT, expand=tkinter.FALSE)
canvas = tkinter.Canvas(
self,
borderwidth=0,
highlightthickness=0,
yscrollcommand=vscrollbar.set,
width=240,
)
canvas.pack(side=tkinter.LEFT, fill=tkinter.BOTH, expand=tkinter.TRUE)
vscrollbar.config(command=canvas.yview)
# Reset the view.
canvas.xview_moveto(0)
canvas.yview_moveto(0)
# Create a frame inside the canvas which will be scrolled with it.
self.interior = interior = tkinter.Frame(canvas)
interior_id = canvas.create_window(0, 0, window=interior, anchor=tkinter.NW)
# Track changes to the canvas and frame width and sync them,
# also updating the scrollbar.
def _configure_interior(event):
# Update the scrollbars to match the size of the inner frame.
size = (interior.winfo_reqwidth(), interior.winfo_reqheight())
canvas.config(scrollregion="0 0 %s %s" % size)
interior.bind("<Configure>", _configure_interior)
def _configure_canvas(event):
if interior.winfo_reqwidth() != canvas.winfo_width():
# Update the inner frame's width to fill the canvas.
canvas.itemconfigure(interior_id, width=canvas.winfo_width())
canvas.bind("<Configure>", _configure_canvas)
return
# From Python 3.7 Lib/tkinter/__init__.py
# Copyright 2000 Fredrik Lundh
# Python License
#
# add support for 'state' and 'name' kwargs
# add support for updating list of options
class OptionMenu(tkinter.Menubutton):
"""OptionMenu which allows the user to select a value from a menu."""
def __init__(self, master, variable, value, *values, **kwargs):
"""Construct an optionmenu widget with the parent MASTER, with
the resource textvariable set to VARIABLE, the initially selected
value VALUE, the other menu values VALUES and an additional
keyword argument command."""
kw = {
"borderwidth": 2,
"textvariable": variable,
"indicatoron": 1,
"relief": tkinter.RAISED,
"anchor": "c",
"highlightthickness": 2,
}
if "state" in kwargs:
kw["state"] = kwargs["state"]
del kwargs["state"]
if "name" in kwargs:
kw["name"] = kwargs["name"]
del kwargs["name"]
tkinter.Widget.__init__(self, master, "menubutton", kw)
self.widgetName = "tk_optionMenu"
self.callback = kwargs.get("command")
self.variable = variable
if "command" in kwargs:
del kwargs["command"]
if kwargs:
raise tkinter.TclError("unknown option -" + list(kwargs.keys())[0])
self.set_values([value] + list(values))
def __getitem__(self, name):
if name == "menu":
return self.__menu
return tkinter.Widget.__getitem__(self, name)
def set_values(self, values):
menu = self.__menu = tkinter.Menu(self, name="menu", tearoff=0)
self.menuname = menu._w
for v in values:
menu.add_command(
label=v, command=tkinter._setit(self.variable, v, self.callback)
)
self["menu"] = menu
def destroy(self):
"""Destroy this widget and the associated menu."""
tkinter.Menubutton.destroy(self)
self.__menu = None
class Application(tkinter.Frame):
def __init__(self, master=None):
super().__init__(master)
self.master = master
self.master.title("plakativ")
self.pack(fill=tkinter.BOTH, expand=tkinter.TRUE)
self.canvas = tkinter.Canvas(self, bg="black")
self.canvas.pack(fill=tkinter.BOTH, side=tkinter.LEFT, expand=tkinter.TRUE)
self.canvas_size = self.canvas.winfo_width(), self.canvas.winfo_height()
self.canvas.bind("<Configure>", self.on_resize)
frame_right = tkinter.Frame(self)
frame_right.pack(side=tkinter.TOP, expand=tkinter.TRUE, fill=tkinter.Y)
top_frame = tkinter.Frame(frame_right)
top_frame.pack(fill=tkinter.X)
tkinter.Button(top_frame, text="Open PDF", command=self.on_open_button).pack(
side=tkinter.LEFT, expand=tkinter.TRUE, fill=tkinter.X
)
tkinter.Button(top_frame, text="Help", state=tkinter.DISABLED).pack(
side=tkinter.RIGHT, expand=tkinter.TRUE, fill=tkinter.X
)
frame1 = VerticalScrolledFrame(frame_right)
frame1.pack(side=tkinter.TOP, expand=tkinter.TRUE, fill=tkinter.Y)
self.input = InputWidget(frame1.interior)
self.input.pack(fill=tkinter.X)
self.input.set(1, (0, 0))
if hasattr(self, "plakativ"):
self.input.callback = self.on_input
self.pagesize = PageSizeWidget(frame1.interior)
self.pagesize.pack(fill=tkinter.X)
self.pagesize.set(False, (210, 297))
if hasattr(self, "plakativ"):
self.pagesize.callback = self.on_pagesize
self.bordersize = BorderSizeWidget(frame1.interior)
self.bordersize.pack(fill=tkinter.X)
self.bordersize.set(15.0, 15.0, 15.0, 15.0)
if hasattr(self, "plakativ"):
self.bordersize.callback = self.on_bordersize
self.postersize = PostersizeWidget(frame1.interior)
self.postersize.pack(fill=tkinter.X)
self.postersize.set("size", (False, (594, 841)), 1.0, 1)
if hasattr(self, "plakativ"):
self.postersize.callback = self.on_postersize
self.layouter = LayouterWidget(frame1.interior)
self.layouter.pack(fill=tkinter.X)
self.layouter.set("simple")
if hasattr(self, "plakativ"):
self.layouter.callback = self.on_layouter
self.outopts = OutOptsWidget(frame1.interior)
self.outopts.pack(fill=tkinter.X)
option_group = tkinter.LabelFrame(frame1.interior, text="Program options")
option_group.pack(fill=tkinter.X)
tkinter.Label(option_group, text="Unit:", state=tkinter.DISABLED).grid(
row=0, column=0, sticky=tkinter.W
)
unit = tkinter.StringVar()
unit.set("mm")
OptionMenu(option_group, unit, ["mm"], state=tkinter.DISABLED).grid(
row=0, column=1, sticky=tkinter.W
)
tkinter.Label(option_group, text="Language:", state=tkinter.DISABLED).grid(
row=1, column=0, sticky=tkinter.W
)
language = tkinter.StringVar()
language.set("English")
OptionMenu(option_group, language, ["English"], state=tkinter.DISABLED).grid(
row=1, column=1, sticky=tkinter.W
)
bottom_frame = tkinter.Frame(frame_right)
bottom_frame.pack(fill=tkinter.X)
self.save_button = tkinter.Button(
bottom_frame,
text="Save PDF",
command=self.on_save_button,
state=tkinter.DISABLED,
)
self.save_button.pack(side=tkinter.LEFT, expand=tkinter.TRUE, fill=tkinter.X)
quit_button = tkinter.Button(
bottom_frame, text="Exit", command=self.master.destroy
)
quit_button.pack(side=tkinter.RIGHT, expand=tkinter.TRUE, fill=tkinter.X)
def on_input(self, value):
_, pagesize = self.pagesize.value
pagenum, _ = value
mode, (custom_size, size), mult, npages = self.postersize.value
bordersize = self.bordersize.value
strategy = self.layouter.value
self.plakativ.set_input_pagenr(pagenum - 1)
size, mult, npages = self.plakativ.compute_layout(
mode, size, mult, npages, pagesize, bordersize, strategy
)
self.postersize.set(mode, (custom_size, size), mult, npages)
self.draw()
width, height = self.plakativ.get_input_page_size()
return "%.02f" % pt_to_mm(width), "%.02f" % pt_to_mm(height)
def on_pagesize(self, value):
_, pagesize = value
pagenum, _ = self.input.value
mode, (custom_size, size), mult, npages = self.postersize.value
bordersize = self.bordersize.value
strategy = self.layouter.value
self.plakativ.set_input_pagenr(pagenum - 1)
size, mult, npages = self.plakativ.compute_layout(
mode, size, mult, npages, pagesize, bordersize, strategy
)
self.postersize.set(mode, (custom_size, size), mult, npages)
self.draw()
def on_bordersize(self, value):
_, pagesize = self.pagesize.value
pagenum, _ = self.input.value
mode, (custom_size, size), mult, npages = self.postersize.value
strategy = self.layouter.value
self.plakativ.set_input_pagenr(pagenum - 1)
size, mult, npages = self.plakativ.compute_layout(
mode, size, mult, npages, pagesize, value, strategy
)
self.postersize.set(mode, (custom_size, size), mult, npages)
self.draw()
def on_postersize(self, value):
mode, (custom_size, size), mult, npages = value
pagenum, _ = self.input.value
_, pagesize = self.pagesize.value
border = self.bordersize.value
strategy = self.layouter.value
self.plakativ.set_input_pagenr(pagenum - 1)
size, mult, npages = self.plakativ.compute_layout(
mode, size, mult, npages, pagesize, border, strategy
)
self.draw()
return (mode, (custom_size, size), mult, npages)
def on_layouter(self, value):
_, pagesize = self.pagesize.value
pagenum, _ = self.input.value
mode, (custom_size, size), mult, npages = self.postersize.value
border = self.bordersize.value
self.plakativ.set_input_pagenr(pagenum - 1)
size, mult, npages = self.plakativ.compute_layout(
mode, size, mult, npages, pagesize, border, value
)
self.postersize.set(mode, (custom_size, size), mult, npages)
self.draw()
def on_resize(self, event):
self.canvas_size = (event.width, event.height)
self.draw()
def draw(self):
# clean canvas
self.canvas.delete(tkinter.ALL)
if not hasattr(self, "plakativ"):
self.canvas.create_text(
self.canvas_size[0] / 2,
self.canvas_size[1] / 2,
text='Click on the "Open PDF" button in the upper right.',
fill="white",
)
return
canvas_padding = 10
width, height = self.plakativ.get_input_page_size()
# factor to convert from input page dimensions (given in pt) into
# canvas dimensions (given in pixels)
zoom_0 = min(
self.canvas_size[0]
/ width
* self.plakativ.layout["postersize"][0]
/ (self.plakativ.layout["overallsize"][0] + canvas_padding),
self.canvas_size[1]
/ height
* self.plakativ.layout["postersize"][1]
/ (self.plakativ.layout["overallsize"][1] + canvas_padding),
)
img = self.plakativ.get_image(zoom_0)
tkimg = tkinter.PhotoImage(data=img)
# factor to convert from output poster dimensions (given in mm) into
# canvas dimensions (given in pixels)
zoom_1 = min(
self.canvas_size[0]
/ (self.plakativ.layout["overallsize"][0] + canvas_padding),
self.canvas_size[1]
/ (self.plakativ.layout["overallsize"][1] + canvas_padding),
)
# draw image on canvas
self.canvas.create_image(
(self.canvas_size[0] - zoom_1 * self.plakativ.layout["overallsize"][0]) / 2
+ zoom_1 * self.plakativ.layout["posterpos"][0],
(self.canvas_size[1] - zoom_1 * self.plakativ.layout["overallsize"][1]) / 2
+ zoom_1 * self.plakativ.layout["posterpos"][1],
anchor=tkinter.NW,
image=tkimg,
)
self.canvas.image = tkimg
# self.canvas.create_text(
# self.canvas_size[0] / 2,
# self.canvas_size[1] / 2,
# text="%d" % len(self.plakativ.layout["positions"]),
# fill="grey",
# font=("TkDefaultFont", 40),
# anchor=tkinter.CENTER,
# )
# draw rectangles
# TODO: also draw numbers indicating the page number
for (x, y, portrait) in self.plakativ.layout["positions"]:
x0 = (x + self.plakativ.layout["posterpos"][0]) * zoom_1 + (
self.canvas_size[0] - zoom_1 * self.plakativ.layout["overallsize"][0]
) / 2
y0 = (y + self.plakativ.layout["posterpos"][1]) * zoom_1 + (
self.canvas_size[1] - zoom_1 * self.plakativ.layout["overallsize"][1]
) / 2
if portrait:
page_width = self.plakativ.layout["output_pagesize"][0] * zoom_1
page_height = self.plakativ.layout["output_pagesize"][1] * zoom_1
top = self.plakativ.layout["border_top"] * zoom_1
right = self.plakativ.layout["border_right"] * zoom_1
bottom = self.plakativ.layout["border_bottom"] * zoom_1
left = self.plakativ.layout["border_left"] * zoom_1
else:
# page is rotated 90 degrees clockwise
page_width = self.plakativ.layout["output_pagesize"][1] * zoom_1
page_height = self.plakativ.layout["output_pagesize"][0] * zoom_1
top = self.plakativ.layout["border_left"] * zoom_1
right = self.plakativ.layout["border_top"] * zoom_1
bottom = self.plakativ.layout["border_right"] * zoom_1
left = self.plakativ.layout["border_bottom"] * zoom_1
# inner rectangle
self.canvas.create_rectangle(
x0,
y0,
x0 + page_width - left - right,
y0 + page_height - top - bottom,
outline="blue",
)
# outer rectangle
self.canvas.create_rectangle(
x0 - left,
y0 - top,
x0 - left + page_width,
y0 - top + page_height,
outline="red",
)
# filename = "out_%03d.ps" % len(self.plakativ.layout["positions"])
# self.canvas.postscript(file=filename)
# print("saved ", filename)
def on_open_button(self):
if have_img2pdf:
filetypes = [
("all supported", "*.pdf *.png *.jpg *.jpeg *.gif *.tiff *.tif"),
("pdf documents", "*.pdf"),
("png images", "*.png"),
("jpg images", "*.jpg *.jpeg"),
("gif images", "*.gif"),
("tiff images", "*.tiff *.tif"),
("all files", "*"),
]
else:
filetypes = [
("pdf documents", "*.pdf"),
("all files", "*"),
]
filename = tkinter.filedialog.askopenfilename(
parent=self.master,
title="Open either a PDF or a raster image",
filetypes=filetypes
# initialdir="/home/josch/git/plakativ",
# initialfile="test.pdf",
)
if filename == ():
return
self.open_file(filename)
def open_file(self, filename):
self.filename = filename
doc = None
if have_img2pdf:
# if we have img2pdf available we can encapsulate a raster image
# into a PDF container
data = None
try:
data = img2pdf.convert(self.filename)
except img2pdf.AlphaChannelError:
remove_alpha = tkinter.messagebox.askyesno(
title="Removing Alpha Channel",
message="PDF does not support alpha channels. Should the "
"alpha channel be removed? The resulting PDF might not be "
"lossless anymore.",
)
# remove alpha channel
if remove_alpha:
from PIL import Image
img = Image.open(self.filename).convert("RGBA")
background = Image.new("RGBA", img.size, (255, 255, 255))
img = Image.alpha_composite(background, img)
with BytesIO() as output:
img.convert("RGB").save(output, format="PNG")
output.seek(0)
data = img2pdf.convert(output)
else:
return
except img2pdf.ImageOpenError:
# img2pdf cannot handle this
pass
if data is not None:
stream = BytesIO()
stream.write(data)
doc = fitz.open(stream=stream, filetype="application/pdf")
if doc is None:
# either we didn't have img2pdf or opening the input with img2pdf
# failed
doc = fitz.open(filename=self.filename)
self.plakativ = Plakativ(doc)
# compute the splitting with the current values
mode, (custom_size, size), mult, npages = self.postersize.value
_, pagesize = self.pagesize.value
border = self.bordersize.value
strategy = self.layouter.value
size, mult, npages = self.plakativ.compute_layout(
mode, size, mult, npages, pagesize, border, strategy
)
# update input widget
width, height = self.plakativ.get_input_page_size()
self.input.set(1, ("%.02f" % pt_to_mm(width), "%.02f" % pt_to_mm(height)))
self.input.nametowidget("spinbox_pagenum").configure(
to=self.plakativ.get_input_pagenums()
)
self.input.nametowidget("label_of_pagenum").configure(
text="of %d" % self.plakativ.get_input_pagenums()
)
# update postersize widget
self.postersize.set(mode, (custom_size, size), mult, npages)
# draw preview in canvas
self.draw()
# enable save button
self.save_button.configure(state=tkinter.NORMAL)
# set callback function
self.input.callback = self.on_input
self.pagesize.callback = self.on_pagesize
self.bordersize.callback = self.on_bordersize
self.postersize.callback = self.on_postersize
self.layouter.callback = self.on_layouter
def on_save_button(self):
base, ext = os.path.splitext(os.path.basename(self.filename))
filename = tkinter.filedialog.asksaveasfilename(
parent=self.master,
title="Save as PDF",
defaultextension=".pdf",
filetypes=[("pdf documents", "*.pdf"), ("all files", "*")],
initialdir=os.path.dirname(self.filename),
initialfile=base + "_poster" + ext,
)
if filename == "":
return
self.plakativ.render(
filename,
cover=self.outopts.variables["cover"].get(),
guides=self.outopts.variables["guides"].get(),
numbers=self.outopts.variables["numbers"].get(),
border=self.outopts.variables["border"].get(),
)
class LayouterWidget(tkinter.LabelFrame):
def __init__(self, parent, *args, **kw):
tkinter.LabelFrame.__init__(self, parent, text="Layouter", *args, **kw)
self.callback = None
self.variables = {"strategy": tkinter.StringVar()}
def callback(varname, idx, op):
assert op == "w"
self.on_strategy(self.variables["strategy"].get())
self.variables["strategy"].trace("w", callback)
layouter1 = tkinter.Radiobutton(
self, text="Simple", variable=self.variables["strategy"], value="simple"
)
layouter1.pack(anchor=tkinter.W)
layouter3 = tkinter.Radiobutton(
self, text="Complex", variable=self.variables["strategy"], value="complex"
)
layouter3.pack(anchor=tkinter.W)
def on_strategy(self, value):
if getattr(self, "value", None) is None:
return
strategy = self.value
self.set(value)
def set(self, strategy):
# before setting self.value, check if the effective value is different
# from before or otherwise we do not need to execute the callback in
# the end
state_changed = True
if getattr(self, "value", None) is not None:
state_changed = self.value != strategy
# execute callback if necessary
if state_changed and self.callback is not None:
pagesize = self.callback(strategy)
self.value = strategy
if self.variables["strategy"].get() != strategy:
self.variables["strategy"].set(strategy)
class OutOptsWidget(tkinter.LabelFrame):
def __init__(self, parent, *args, **kw):
tkinter.LabelFrame.__init__(self, parent, text="Output options", *args, **kw)
self.variables = {
"guides": tkinter.IntVar(),
"border": tkinter.IntVar(),
"numbers": tkinter.IntVar(),
"cover": tkinter.IntVar(),
}
tkinter.Checkbutton(
self, text="Print cutting guides", variable=self.variables["guides"]
).pack(anchor=tkinter.W)
tkinter.Checkbutton(
self, text="Print poster border", variable=self.variables["border"]
).pack(anchor=tkinter.W)
tkinter.Checkbutton(
self, text="Print page number", variable=self.variables["numbers"]
).pack(anchor=tkinter.W)
tkinter.Checkbutton(
self, text="Print layout cover page", variable=self.variables["cover"]
).pack(anchor=tkinter.W)
class InputWidget(tkinter.LabelFrame):
def __init__(self, parent, *args, **kw):
tkinter.LabelFrame.__init__(self, parent, text="Input properties", *args, **kw)
self.callback = None
self.variables = {
"pagenum": tkinter.IntVar(),
"width": tkinter.StringVar(),
"height": tkinter.StringVar(),
}
def callback(varname, idx, op):
assert op == "w"
self.on_pagenum(self.variables["pagenum"].get())
self.variables["pagenum"].trace("w", callback)
tkinter.Label(self, text="Use page").grid(row=0, column=0, sticky=tkinter.W)
tkinter.Spinbox(
self,
increment=1,
from_=1,
to=100,
width=3,
name="spinbox_pagenum",
textvariable=self.variables["pagenum"],
).grid(row=0, column=1, sticky=tkinter.W)
tkinter.Label(self, text="of 1", name="label_of_pagenum").grid(
row=0, column=2, sticky=tkinter.W
)
tkinter.Label(self, text="Width:").grid(row=1, column=0, sticky=tkinter.W)
tkinter.Label(self, textvariable=self.variables["width"]).grid(
row=1, column=1, sticky=tkinter.W
)
tkinter.Label(self, text="mm", name="size_label_width_mm").grid(
row=1, column=2, sticky=tkinter.W
)
tkinter.Label(self, text="Height:").grid(row=2, column=0, sticky=tkinter.W)
tkinter.Label(self, textvariable=self.variables["height"]).grid(
row=2, column=1, sticky=tkinter.W
)
tkinter.Label(self, text="mm", name="size_label_height_mm").grid(
row=2, column=2, sticky=tkinter.W
)
def on_pagenum(self, value):
if getattr(self, "value", None) is None:
return
_, size = self.value
self.set(value, size)
def set(self, pagenum, pagesize):
# before setting self.value, check if the effective value is different
# from before or otherwise we do not need to execute the callback in
# the end
state_changed = True
if getattr(self, "value", None) is not None:
state_changed = self.value != (pagenum, pagesize)
# execute callback if necessary
if state_changed and self.callback is not None:
pagesize = self.callback((pagenum, pagesize))
self.value = (pagenum, pagesize)
width, height = pagesize
if self.variables["pagenum"].get() != pagenum:
self.variables["pagenum"].set(pagenum)
if self.variables["width"].get() != width:
self.variables["width"].set(width)
if self.variables["height"].get() != height:
self.variables["height"].set(height)
class PageSizeWidget(tkinter.LabelFrame):
def __init__(self, parent, *args, **kw):
tkinter.LabelFrame.__init__(
self, parent, text="Size of output pages", *args, **kw
)
self.callback = None
self.variables = {
"dropdown": tkinter.StringVar(),
"width": tkinter.DoubleVar(),
"height": tkinter.DoubleVar(),
}
for k, v in self.variables.items():
# need to pass k and v as function arguments so that their value
# does not get overwritten each loop iteration
def callback(varname, idx, op, k_copy=k, v_copy=v):
assert op == "w"
getattr(self, "on_" + k_copy)(v_copy.get())
v.trace("w", callback)
OptionMenu(self, self.variables["dropdown"], *PAGE_SIZES.keys()).grid(
row=1, column=0, columnspan=3, sticky=tkinter.W
)
tkinter.Label(
self, text="Width:", state=tkinter.DISABLED, name="size_label_width"
).grid(row=2, column=0, sticky=tkinter.W)
tkinter.Spinbox(
self,
format="%.2f",
increment=0.01,
from_=0,
to=100,
width=5,
state=tkinter.DISABLED,
name="spinbox_width",
textvariable=self.variables["width"],
).grid(row=2, column=1, sticky=tkinter.W)
tkinter.Label(
self, text="mm", state=tkinter.DISABLED, name="size_label_width_mm"
).grid(row=2, column=2, sticky=tkinter.W)
tkinter.Label(
self, text="Height:", state=tkinter.DISABLED, name="size_label_height"
).grid(row=3, column=0, sticky=tkinter.W)
tkinter.Spinbox(
self,
format="%.2f",
increment=0.01,
from_=0,
to=100,
width=5,
state=tkinter.DISABLED,
name="spinbox_height",
textvariable=self.variables["height"],
).grid(row=3, column=1, sticky=tkinter.W)
tkinter.Label(
self, text="mm", state=tkinter.DISABLED, name="size_label_height_mm"
).grid(row=3, column=2, sticky=tkinter.W)
def on_dropdown(self, value):
custom_size, size = self.value
if value == "custom":
custom_size = True
else:
custom_size = False
size = PAGE_SIZES[value]
self.set(custom_size, size)
def on_width(self, value):
if getattr(self, "value", None) is None:
return
custom_size, (_, height) = self.value
self.set(custom_size, (value, height))
def on_height(self, value):
if getattr(self, "value", None) is None:
return
custom_size, (width, _) = self.value
self.set(custom_size, (width, value))
def set(self, custom_size, pagesize):
# before setting self.value, check if the effective value is different
# from before or otherwise we do not need to execute the callback in
# the end
state_changed = True
if getattr(self, "value", None) is not None:
state_changed = self.value != (custom_size, pagesize)
# execute callback if necessary
if state_changed and self.callback is not None:
self.callback((custom_size, pagesize))
self.value = (custom_size, pagesize)
width, height = pagesize
if custom_size:
self.nametowidget("size_label_width").configure(state=tkinter.NORMAL)
self.nametowidget("spinbox_width").configure(state=tkinter.NORMAL)
self.nametowidget("size_label_width_mm").configure(state=tkinter.NORMAL)
self.nametowidget("size_label_height").configure(state=tkinter.NORMAL)
self.nametowidget("spinbox_height").configure(state=tkinter.NORMAL)
self.nametowidget("size_label_height_mm").configure(state=tkinter.NORMAL)
else:
self.nametowidget("size_label_width").configure(state=tkinter.DISABLED)
self.nametowidget("spinbox_width").configure(state=tkinter.DISABLED)
self.nametowidget("size_label_width_mm").configure(state=tkinter.DISABLED)
self.nametowidget("size_label_height").configure(state=tkinter.DISABLED)
self.nametowidget("spinbox_height").configure(state=tkinter.DISABLED)
self.nametowidget("size_label_height_mm").configure(state=tkinter.DISABLED)
# only set variables that changed to not trigger multiple variable tracers
if custom_size:
if self.variables["dropdown"].get() != "custom":
self.variables["dropdown"].set("custom")
else:
val = dict(zip(PAGE_SIZES.values(), PAGE_SIZES.keys()))[(width, height)]
if self.variables["dropdown"].get() != val:
self.variables["dropdown"].set(val)
if self.variables["width"].get() != width:
self.variables["width"].set(width)
if self.variables["height"].get() != height:
self.variables["height"].set(height)
class BorderSizeWidget(tkinter.LabelFrame):
def __init__(self, parent, *args, **kw):
tkinter.LabelFrame.__init__(
self, parent, text="Output Borders/Overlap", *args, **kw
)
self.callback = None
self.variables = dict()
for i, (n, label) in enumerate(
[
("top", "Top:"),
("right", "Right:"),
("bottom", "Bottom:"),
("left", "Left:"),
]
):
self.variables[n] = tkinter.DoubleVar()
# need to pass k and v as function arguments so that their value
# does not get overwritten each loop iteration
def callback(varname, idx, op, k_copy=n, v_copy=self.variables[n]):
assert op == "w"
getattr(self, "on_" + k_copy)(v_copy.get())
self.variables[n].trace("w", callback)
tkinter.Label(self, text=label).grid(row=i, column=0, sticky=tkinter.W)
tkinter.Spinbox(
self,
format="%.2f",
increment=1.0,
from_=0,
to=100,
width=5,
textvariable=self.variables[n],
).grid(row=i, column=1)
tkinter.Label(self, text="mm").grid(row=i, column=2)
def on_top(self, value):
if getattr(self, "value", None) is None:
return
_, right, bottom, left = self.value
self.set(value, right, bottom, left)
def on_right(self, value):
if getattr(self, "value", None) is None:
return
top, _, bottom, left = self.value
self.set(top, value, bottom, left)
def on_bottom(self, value):
if getattr(self, "value", None) is None:
return
top, right, _, left = self.value
self.set(top, right, value, left)
def on_left(self, value):
if getattr(self, "value", None) is None:
return
top, right, bottom, _ = self.value
self.set(top, right, bottom, value)
def set(self, top, right, bottom, left):
# before setting self.value, check if the effective value is different
# from before or otherwise we do not need to execute the callback in
# the end
state_changed = True
if getattr(self, "value", None) is not None:
state_changed = self.value != (top, right, bottom, left)
# execute callback if necessary
if state_changed and self.callback is not None:
self.callback((top, right, bottom, left))
self.value = top, right, bottom, left
# only set variables that changed to not trigger multiple variable tracers
if self.variables["top"].get() != top:
self.variables["top"].set(top)
if self.variables["right"].get() != right:
self.variables["right"].set(right)
if self.variables["bottom"].get() != bottom:
self.variables["bottom"].set(bottom)
if self.variables["left"].get() != left:
self.variables["left"].set(left)
class PostersizeWidget(tkinter.LabelFrame):
def __init__(self, parent, *args, **kw):
tkinter.LabelFrame.__init__(self, parent, text="Poster Size", *args, **kw)
self.callback = None
self.variables = {
"radio": tkinter.StringVar(),
"dropdown": tkinter.StringVar(),
"width": tkinter.DoubleVar(),
"height": tkinter.DoubleVar(),
"multiplier": tkinter.DoubleVar(),
"pages": tkinter.IntVar(),
}
for k, v in self.variables.items():
# need to pass k and v as function arguments so that their value
# does not get overwritten each loop iteration
def callback(varname, idx, op, k_copy=k, v_copy=v):
assert op == "w"
getattr(self, "on_" + k_copy)(v_copy.get())
v.trace("w", callback)
tkinter.Radiobutton(
self,
text="Fit into width/height",
variable=self.variables["radio"],
value="size",
state=tkinter.DISABLED,
name="size_radio",
).grid(row=0, column=0, columnspan=3, sticky=tkinter.W)
OptionMenu(
self,
self.variables["dropdown"],
*PAGE_SIZES.keys(),
# state=tkinter.DISABLED,
name="size_dropdown",
).grid(row=1, column=0, columnspan=3, sticky=tkinter.W, padx=(27, 0))
tkinter.Label(
self, text="Width:", state=tkinter.DISABLED, name="size_label_width"
).grid(row=2, column=0, sticky=tkinter.W, padx=(27, 0))
tkinter.Spinbox(
self,
format="%.2f",
increment=0.1,
from_=0,
to=10000,
width=5,
textvariable=self.variables["width"],
state=tkinter.DISABLED,
name="size_spinbox_width",
).grid(row=2, column=1, sticky=tkinter.W)
tkinter.Label(
self, text="mm", state=tkinter.DISABLED, name="size_label_width_mm"
).grid(row=2, column=2, sticky=tkinter.W)
tkinter.Label(
self, text="Height:", state=tkinter.DISABLED, name="size_label_height"
).grid(row=3, column=0, sticky=tkinter.W, padx=(27, 0))
tkinter.Spinbox(
self,
format="%.2f",
increment=0.1,
from_=0,
to=10000,
width=5,
textvariable=self.variables["height"],
state=tkinter.DISABLED,
name="size_spinbox_height",
).grid(row=3, column=1, sticky=tkinter.W)
tkinter.Label(
self, text="mm", state=tkinter.DISABLED, name="size_label_height_mm"
).grid(row=3, column=2, sticky=tkinter.W)
tkinter.Radiobutton(
self,
text="Factor of input page area",
variable=self.variables["radio"],
value="mult",
state=tkinter.DISABLED,
name="mult_radio",
).grid(row=4, column=0, columnspan=3, sticky=tkinter.W)
tkinter.Label(
self,
text="Multipler:",
state=tkinter.DISABLED,
name="mult_label_multiplier",
).grid(row=5, column=0, sticky=tkinter.W, padx=(27, 0))
tkinter.Spinbox(
self,
format="%.2f",
increment=0.01,
from_=0,
to=10000,
width=6,
textvariable=self.variables["multiplier"],
state=tkinter.DISABLED,
name="mult_spinbox_multiplier",
).grid(row=5, column=1, sticky=tkinter.W)
tkinter.Label(
self, text="%", state=tkinter.DISABLED, name="mult_label_perc"
).grid(row=5, column=2, sticky=tkinter.W)
tkinter.Radiobutton(
self,
text="Fit into X output pages",
variable=self.variables["radio"],
value="npages",
state=tkinter.DISABLED,
name="npages_radio",
).grid(row=6, column=0, columnspan=3, sticky=tkinter.W)
tkinter.Label(
self, text="# of pages:", state=tkinter.DISABLED, name="npages_label"
).grid(row=7, column=0, sticky=tkinter.W, padx=(27, 0))
tkinter.Spinbox(
self,
increment=1,
from_=1,
to=10000,
width=6,
textvariable=self.variables["pages"],
state=tkinter.DISABLED,
name="npages_spinbox",
).grid(row=7, column=1, sticky=tkinter.W)
def on_radio(self, value):
_, size, mult, npages = self.value
self.set(value, size, mult, npages)
def on_dropdown(self, value):
mode, (custom_size, size), mult, npages = self.value
if value == "custom":
custom_size = True
else:
custom_size = False
size = PAGE_SIZES[value]
self.set(mode, (custom_size, size), mult, npages)
def on_width(self, value):
if getattr(self, "value", None) is None:
return
mode, (custom_size, (_, height)), mult, npages = self.value
self.set(mode, (custom_size, (value, height)), mult, npages)
def on_height(self, value):
if getattr(self, "value", None) is None:
return
mode, (custom_size, (width, _)), mult, npages = self.value
self.set(mode, (custom_size, (width, value)), mult, npages)
def on_multiplier(self, value):
if getattr(self, "value", None) is None:
return
mode, size, _, npages = self.value
self.set(mode, size, value, npages)
def on_pages(self, value):
if getattr(self, "value", None) is None:
return
mode, size, mult, _ = self.value
self.set(mode, size, mult, value)
def set(self, mode, size, mult, npages):
# before setting self.value, check if the effective value is different
# from before or otherwise we do not need to execute the callback in
# the end
state_changed = True
if getattr(self, "value", None) is not None:
if mode == self.value[0] == "size":
state_changed = self.value[1][1] != size[1]
elif mode == self.value[0] == "mult":
state_changed = self.value[2] != mult
elif mode == self.value[0] == "npages":
state_changed = self.value[3] != npages
# execute callback if necessary
if state_changed and self.callback is not None:
mode, size, mult, npages = self.callback((mode, size, mult, npages))
self.value = (mode, size, mult, npages)
custom_size, (width, height) = size
# cycle through all widgets and set the state accordingly
for k, v in self.children.items():
if k.endswith("_radio"):
v.configure(state=tkinter.NORMAL)
continue
if not k.startswith(mode + "_"):
v.configure(state=tkinter.DISABLED)
continue
if k in ["size_dropdown", "size_radio"]:
v.configure(state=tkinter.NORMAL)
continue
if mode != "size":
v.configure(state=tkinter.NORMAL)
continue
if custom_size:
v.configure(state=tkinter.NORMAL)
continue
v.configure(state=tkinter.DISABLED)
# only set variables that changed to not trigger multiple variable tracers
if custom_size or mode != "size":
if self.variables["dropdown"].get() != "custom":
self.variables["dropdown"].set("custom")
else:
val = dict(zip(PAGE_SIZES.values(), PAGE_SIZES.keys()))[(width, height)]
if self.variables["dropdown"].get() != val:
self.variables["dropdown"].set(val)
if self.variables["radio"].get() != mode:
self.variables["radio"].set(mode)
if self.variables["width"].get() != width:
self.variables["width"].set(width)
if self.variables["height"].get() != height:
self.variables["height"].set(height)
if self.variables["multiplier"].get() != mult:
self.variables["multiplier"].set(mult)
if self.variables["pages"].get() != npages:
self.variables["pages"].set(npages)
def compute_layout(
infile,
outfile,
mode,
size=None,
mult=None,
npages=None,
pagenr=0,
pagesize=(210, 297),
border=(0, 0, 0, 0),
strategy="simple",
remove_alpha=False,
cover=False,
guides=False,
numbers=False,
poster_border=False,
):
doc = None
if hasattr(infile, "read"):
# we have to slurp in the whole file because we potentially read it
# in multiple times in case img2pdf is installed
# also, mupdf needs to be able to seek(), so we need to slurp it in
# anyways
infile = BytesIO(infile.read())
if have_img2pdf:
# if we have img2pdf available we can encapsulate a raster image
# into a PDF container
data = None
try:
# FIXME: img2pdf should not use the root logger so that instead we
# can run logging.getLogger('img2pdf').setLevel(logging.CRITICAL)
logging.getLogger().setLevel(logging.CRITICAL)
data = img2pdf.convert(infile)
except img2pdf.AlphaChannelError:
if remove_alpha:
# remove alpha channel
from PIL import Image
img = Image.open(infile).convert("RGBA")
background = Image.new("RGBA", img.size, (255, 255, 255))
img = Image.alpha_composite(background, img)
with BytesIO() as output:
img.convert("RGB").save(output, format="PNG")
output.seek(0)
data = img2pdf.convert(output)
else:
print(
"""
Plakativ is lossless by default. To automatically remove the alpha channel from
the input and place the image on a white background, use the --remove-alpha
option""",
file=sys.stderr,
)
exit(1)
except img2pdf.ImageOpenError:
# img2pdf cannot handle this
pass
if data is not None:
stream = BytesIO()
stream.write(data)
doc = fitz.open(stream=stream, filetype="application/pdf")
if doc is None:
# either we didn't have img2pdf or opening the input with img2pdf
# failed
if hasattr(infile, "read"):
doc = fitz.open(stream=infile, filetype="application/pdf")
else:
doc = fitz.open(filename=infile)
plakativ = Plakativ(doc, pagenr)
plakativ.compute_layout(mode, size, mult, npages, pagesize, border, strategy)
plakativ.render(outfile, cover, guides, numbers, poster_border)
def gui(filename=None):
if not have_tkinter:
raise Exception("the GUI requires tkinter")
root = tkinter.Tk()
app = Application(master=root)
if filename is not None:
app.open_file(filename)
app.mainloop()
def parse_num(num, name):
if num == "":
raise argparse.ArgumentTypeError("%s is empty" % name)
unit = None
if num.endswith("pt"):
unit = Unit.pt
elif num.endswith("cm"):
unit = Unit.cm
elif num.endswith("mm"):
unit = Unit.mm
elif num.endswith("in"):
unit = Unit.inch
else:
try:
num = float(num)
except ValueError:
msg = (
"%s is not a floating point number and doesn't have a "
"valid unit: %s" % (name, num)
)
raise argparse.ArgumentTypeError(msg)
if unit is None:
unit = Unit.pt
else:
num = num[:-2]
try:
num = float(num)
except ValueError:
msg = "%s is not a floating point number: %s" % (name, num)
raise argparse.ArgumentTypeError(msg)
if num < 0:
msg = "%s must not be negative: %s" % (name, num)
raise argparse.ArgumentTypeError(msg)
if unit == Unit.cm:
num = cm_to_mm(num)
elif unit == Unit.pt:
num = pt_to_mm(num)
elif unit == Unit.inch:
num = in_to_mm(num)
return num
def parse_borderarg(string):
if ":" in string:
vals = string.split(":")
if len(vals) in [0, 1]:
raise argparse.ArgumentTypeError("logic error")
elif len(vals) == 2:
t = b = parse_num(vals[0], "top/bottom border")
r = l = parse_num(vals[1], "right/left border")
elif len(vals) == 3:
t = parse_num(vals[0], "top border")
r = l = parse_num(vals[1], "right/left border")
b = parse_num(vals[2], "bottom border")
elif len(vals) == 4:
t = parse_num(vals[0], "top border")
r = parse_num(vals[1], "right border")
b = parse_num(vals[2], "bottom border")
l = parse_num(vals[3], "left border")
else:
raise argparse.ArgumentTypeError(
"border option can not have more than four values"
)
else:
if string == "":
raise argparse.ArgumentTypeError("border option cannot be empty")
val = parse_num(string, "border")
t, r, b, l = val, val, val, val
return t, r, b, l
def parse_pagesize_rectarg(string):
if papersizes.get(string.lower()):
string = papersizes[string.lower()]
if "x" not in string:
# if there is no separating "x" in the string, then the string is
# interpreted as the width
w = parse_num(string, "width")
h = None
else:
w, h = string.split("x", 1)
w = parse_num(w, "width")
h = parse_num(h, "height")
if w is None and h is None:
raise argparse.ArgumentTypeError("at least one dimension must be specified")
return w, h
def main():
if len(sys.argv) == 1 and platform.system() != "Windows":
print("""
You called plakativ without arguments. At least one of the options --size,
--factor or --maxpages is required for running plakativ on the command line.
But maybe you meant to run the plakativ GUI instead? On platforms other than
Windows, the default is to run the command line interface. To run the graphical
user interface, run plakativ with the --gui option instead.
""", file=sys.stderr)
rendered_papersizes = ""
for k, v in sorted(papersizes.items()):
rendered_papersizes += " %-8s %s\n" % (papernames[k], v)
parser = argparse.ArgumentParser(
formatter_class=argparse.RawDescriptionHelpFormatter,
description="""\
Create large posters by printing and gluing together smaller pages.
This program is for situations when you want to create a large poster or banner
but do not have a printer that supports large sheets of paper. Plakativ allows
one to enlarge and split a PDF across multiple pages, creating another PDF with
pages of the desired printable size. After printing, the pages can be cut and
glued together to form a larger poster. Features:
- lossless operation
- no pixel artifacts when upscaling if PDF contains vector graphics
- GUI with preview functionality
- complex layouter to save paper
- optimize by number of pages, output poster size or multiple of input area
- support for raster images as input if img2pdf is available
Options:
""",
epilog="""\
Poster size:
There are three ways to set the size of the final poster. The desired method
is selected using the mutually exclusive options --size, --factor and
--maxpages. The --size option allows one to specify a width and height into
which the input will be fitted, swapping width and height as necessary, to
create the largest possible poster with those dimensions while keeping the
aspect ratio of the input. The --factor option scales the area of the input
by the given multiplier. If the input is a DIN A4 page, then a factor of 2
will create a DIN A3 poster. The --maxpages option allows one to specify a
maximum number of pages one is willing to print out and creates the largest
possible poster that can possibly be created with the given number of pages.
For example, printing a DIN A1 poster on DIN A4 pages with a border of 15 mm
will require 15 pages with the simple layouter engine. With --maxpages=15 a
slightly larger poster will be generated but will make better use of the
available number of pages of paper. Using the complex layouter, an even
bigger poster can be generated with just 15 pages of paper by changing the
orientation of some of them.
Paper sizes:
You can specify the short hand paper size names shown in the first column in
the table below as arguments to the --pagesize and --imgsize options. The
width and height they are mapping to is shown in the second column. Giving
the value in the second column has the same effect as giving the short hand
in the first column. The values are case insensitive.
%s
Borders, cutting and gluing:
The border on each page set using the --border option has two purposes.
Firstly, the border is useful for printers that do not support borderless
printing. Secondly, the border is the area where the individual pages overlap
and can be glued together. Before gluing, cut away the border area where the
printer was unable to print on. As long as you stay within the distance set
by the --border option, you don't need precision tools to do the cutting but
can cut freehand using a pair of scissors. You only need to cut the borders
from those edges that will end up being glued onto another piece of paper.
By keeping even the area at the border your printer could not print on from
the paper at the bottom you maintain a larger area for the glue.
Examples:
To run the tkinter GUI execute either:
$ plakativ-gui
$ plakativ --gui
To use plakativ without GUI from the command line you can run:
$ plakativ --size A1 --output=poster.pdf input.pdf
This will create a file poster.pdf with multiple DIN A4 pages which, after
being cut and glued together will form a DIN A1 poster of the content on the
first page of input.pdf.
If img2pdf is available as a Python module, then plakativ can also use raster
images as input. Since img2pdf refuses to work on images with an alpha channel,
you can instruct plakativ to remove the alpha channel for you with the
--remove-alpha flag:
$ plakativ --size A1 --output=poster.pdf --remove-alpha input.png
Written by Johannes 'josch' Schauer <josch@mister-muffin.de>
Report bugs at https://gitlab.mister-muffin.de/josch/plakativ/issues
"""
% rendered_papersizes,
)
parser.add_argument(
"-v",
"--verbose",
action="store_true",
help="Makes the program operate in verbose mode, printing messages on "
"standard error.",
)
parser.add_argument(
"-V",
"--version",
action="version",
version="%(prog)s " + VERSION,
help="Prints version information and exits.",
)
gui_group = parser.add_mutually_exclusive_group(required=False)
gui_group.add_argument(
"--gui",
dest="gui",
action="store_true",
help="run tkinter gui (default on Windows)",
)
gui_group.add_argument(
"--nogui",
dest="gui",
action="store_false",
help="don't run tkinter gui (default elsewhere)",
)
if platform.system() == "Windows":
parser.set_defaults(gui=True)
else:
parser.set_defaults(gui=False)
mode_group = parser.add_mutually_exclusive_group(required=False)
mode_group.add_argument(
"--size",
metavar="LxL",
dest="mode",
type=parse_pagesize_rectarg,
help="Poster width/height either as width times height or one of the "
"known paper sizes (see below). Cannot be used together with --factor "
"or --maxpages.",
)
mode_group.add_argument(
"--factor",
metavar="MULT",
dest="mode",
type=float,
help="Poster size as multiple of input page area. Cannot be used "
"together with --size or --maxpages.",
)
mode_group.add_argument(
"--maxpages",
metavar="NUM",
dest="mode",
type=int,
help="Maximum possible poster size with the given number of pages. "
"Cannot be used together with --size or --factor.",
)
parser.add_argument("-o", "--output", help="output filename (default: stdout)")
parser.add_argument("input", nargs="?", help="input filename (default: stdin)")
parser.add_argument(
"--pagenum",
type=int,
default=1,
help="Page number of input PDF to turn into a poster (default: 1)",
)
parser.add_argument(
"--pagesize",
metavar="LxL",
type=parse_pagesize_rectarg,
default=(210, 297),
help="Width and height of the output pages or one of the known paper "
"sizes (see below). This is the paper size that you are printing on "
"with your printer (default: A4)",
)
parser.add_argument(
"--border",
metavar="L[:L[:L[:L]]]",
type=parse_borderarg,
default=(15, 15, 15, 15),
help="The borders on each output page for gluing. This specifies how "
"much the pages overlap each other. If your printer cannot print "
"borderless, then this value should also be larger than the border up "
"to which your printer is able to print. One value sets the border on "
"all four sides. Multiple values are separated by a colon. With two "
"values, the first value sets top and bottom border and the second "
"value sets left and right border. With three values, the first value "
"sets the top border, the second value the left and right border and "
"the third value the bottom border. Four values set top, right, "
"bottom and left borders in that order.",
)
parser.add_argument(
"--layouter",
choices=["simple", "complex"],
default="simple",
help="The algorithm arranging the individual pages making the poster. "
"The simple layout has all pages in the same orientation. The complex "
"layout is able to sometimes require less pages for the same poster "
"size and is allowed to rotate pages.",
)
parser.add_argument(
"--remove-alpha",
action="store_true",
help="When the input is a raster image instead of a PDF document, "
"plakativ can remove the alpha channel for you. The resulting PDF "
"poster might not be lossless anymore.",
)
parser.add_argument(
"--cover-page",
action="store_true",
help="Add a cover page as the first page which shows the resulting "
"layout. This is especially interesting for the complex layouter "
"unless you like puzzles.",
)
parser.add_argument(
"--cutting-guides",
action="store_true",
help="Print light-gray dashed lines that surround the visible part "
"of each page and can help with easier cutting and gluing of the "
"pages. This is generally only needed if the poster does not contain "
"enough detail for accurate gluing.",
)
parser.add_argument(
"--page-numbers",
action="store_true",
help="Print a small number of each page to uniquely identify each "
"sheet. This is especially useful in combination with --cover-page "
"because the numbers on the cover page correspond to the page numbers.",
)
parser.add_argument(
"--poster-border",
action="store_true",
help="If the poster itself has a white background and it is important "
"that the final result has precisely the desired poster size, then "
"this option will print a light-gray dashed border around the whole "
"poster, so that it can be accurately cut to the correct overall size.",
)
args = parser.parse_args()
if args.gui:
gui(args.input)
sys.exit(0)
if not args.input or args.input == "-":
args.input = sys.stdin.buffer
if not args.output or args.output == "-":
args.output = sys.stdout.buffer
if isinstance(args.mode, tuple):
mode = "size"
elif isinstance(args.mode, float):
mode = "mult"
elif isinstance(args.mode, int):
mode = "npages"
else:
print(
"Error: must supply one of --size, --factor or --maxpages\n",
file=sys.stderr,
)
parser.print_usage(sys.stderr)
sys.exit(1)
compute_layout(
args.input,
args.output,
mode,
pagenr=args.pagenum - 1, # zero based
pagesize=args.pagesize,
border=args.border,
strategy=args.layouter,
**{mode: args.mode},
remove_alpha=args.remove_alpha,
cover=args.cover_page,
guides=args.cutting_guides,
numbers=args.page_numbers,
poster_border=args.poster_border,
)
if __name__ == "__main__":
main()
__all__ = ["Plakativ", "compute_layout", "simple_cover", "complex_cover"]
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