Current

v 0.0.2
Current imposition routine

• Standard imposition, $2^n$ leaves : Generation algorithm is implemented
• 6, 12 leaves : Supported as pefixed setting

Further Plan

For perpendicular and parallel creasing patterns of paper, its right order layout algorithm will be implemneted.
Thus, all kinds of sections folding types will be supported if they are possible, physically.

Review of previous studies

Determining such works are proved as NP-Hard problem if we started from creasing pattern of the paper.
Without loss of generality, we will start from fold sequence. It is not only enough for representing all types of section folding, at least equivalent, moreover, this makes us to avoid such NP-Hard probelm in implmentation and to focus on real layout algorithm development.

Resources

• Y Jia, J Mitani, R Uehara, 2020, Valid orderings of layers when simple-folding a map, Journal of Inofrmation Processing.
• Erik D. Demaine, Joseph O'Rourke, Geometric Folding Algorthms: Linkages, Origami, Polyhedra, Cambridge University Press, 2007.
• Lang, Robert J, Twists, tilings, and tessellations : mathematical methods for geometric origami

Version 0.0.1 has a progress bar routine in GUI mode but it is deprecated after 0.0.2, since there was lots of changes in structure.
New progress routines is needed for better user experience but, it does not need to be same with previous one.

Improved version will be more represent the full routines of Project and can visually show step by step progress of manuscript.
It will show pipe filter activation, deactivation and selected filters in setting.

Collection mark is supported to identifying sections in collection.
If one section is composed of multiple inserted sub sections, the primary section, wihch is visible section from back, section is the only one get collection mark.
However, inserted sections must have an order identifiers not to be confused other subsections in gathering process.

TODO

• Add sub collection marks for each inserted sections.
  • Design indicator shape.

Default language is English now but, maybe it will be wise to save all texts in UI as seperate resources to add translation.

Processing works of document require various settings for each steps of work.
Save and load requirements setting could prevent tedious typing works for users.

Jobs:

• Choose requirements file format
• Routine001: Converts to UI variables and displaying
• Routine002: Converts UI settings to requirements settings
• Routines003: Parsing requirements arguments to CLI

Duplex printer

The duplex printer printing contents on both side per each page.
It depends on printing devices but, the duplex printing does not perfectly fit.
Considering rotation during printing, rotatting even pages with $180^{\circ}$ angle is commonly supported.
However, addtional transformations, translation and rotation are required for perfect fitting of printing.
In addition, new printing mark is needed for measuing geometrical inbalance of front and back contents.

Done

• New duplex measuring marker routine is implemented in PrintingMark class.
• New converter class Duplex is implemented.

Remains

• UIs need to be updated for using new features
• Documentation of Duplex routine

Current Imposition routines is aming to be used in bookbinding or pamplet printing.
However, repeated imposition is widely used in printing, for example, business card prinitng.

Features

• Modifying gaps in x and y direction each.
• Fit to frame or expand whole pages to cover repeated contents
• Find full cover layout calculation.

It will be implemented with Template class

Needed features

• Manuscript expanding: 1/ 2 pages to the given number of pages
• Header, Footer text add:
  • Page numbering: Each pages, only odd, or even, count all but note only odd or even ...
  • Indicating header-header, footer footer, header/footer alternatively per each 2 pags.
  • Align contents, if overlapped with numbering how can we set orders?

Requiring features: Text width calculation for the given string in pdf.

Done

Basic interface design is done

    Note Mode : On/Off
    Note Pages: Total number of Note <- Must be a multiple of 4
    Page numbering: 
      None, 
      {[Header, Footer], [HF, FH]}, 
      [Both, ODD(n), ODD(y), EVEN(n), EVEN(y)], 
      {[L ,R ,C], [LR, LL, LC, RR, RL ,RC, CC, CR, CL]}
    Header: None, [Both, Odd, Even], [Align], size, repeat by
    Footer: None, [Both, Odd, Even], [Align], size, repeat by

Remains

All

Optimizing Signature composition and rearrangement routines

See program The Signature Optimizer
developed by Carl McTague.

Its details are written at How to Optimize Codex

Text width measuring

In writing texts in template pdf file, its precise dimension is required before applying to real pdf page.
Overlapping objects on result pdf could not be desired result for all situations.
Now its routine is only required by Note utils but further routines would require this feature.

Previous works

Using Pillow's text string method is popular on stackoverflow and the other sites.

• Help me

I implmented prototype version and tested it but pts and point conversion has an issue.

• How to get width of a truetype font character in 1200ths of an inch with python - dawid's answer.

from PIL import Image, ImageDraw, ImageFont
def get_text_dim(string, font_file: str, size):
    im_width = len(string) * size
    im_height = size
    bg_color = (0, 0, 0)

    # Generate string as image
    im = Image.new("RGB", (im_width, im_height), bg_color)
    draw = ImageDraw.Draw(im)
    font_PIL = ImageFont.truetype(font_file, size)
    draw.text((0, 0), string, font=font_PIL, fill=(255, 255, 255))
    bbox = im.getbbox()  # left, upper, right, and lower pixel coordinate

    width = bbox[2] + bbox[0]
    height = bbox[3] + int(bbox[1] / 2)
    return width, height

Others

• https://stackoverflow.com/questions/43828955/measuring-width-of-text-python-pil
• https://stackoverflow.com/questions/64660531/is-there-a-precise-way-to-measure-text-size-in-a-specific-font-in-python-3-7

Done

• Basic font routines are implemented:
  • Load system fonts
  • points <-> pixel conversion for general setting.

Remains

• Fonts routine wapper class implement compatible with fonttools library.
• Measuring dpi for reportlab pdfgen routine.
• Write width measuring based on reportlab routines.

From PyPDF2 to borb

Settings for converting are very large, so it is imposible for users to type all the setting by typing on console terminal.
Including
Yaml file will be applicable for srtting format.

Features

• GUI: Export, import settings.
• CUI: Add export setting in state and importing setting routine add.