Fix pinned dependencies

v11.3.2 release notes (2)
Since we never tagged it, fix other things.
2020-11-03 04:12:47 -08:00 · 2020-11-03 02:03:25 -08:00 · 2020-11-03 01:45:06 -08:00 · 2020-11-03 01:44:35 -08:00 · 2020-11-03 01:34:28 -08:00 · 2020-11-03 01:30:31 -08:00
93 changed files with 2903 additions and 2279 deletions
@@ -0,0 +1,28 @@
+---
+name: General issues
+about: Installation, packages, dependencies, "nothing works", test suite failures...
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+What's the problem?
+
+**To Reproduce**
+Steps to reproduce the behavior.
+
+**Expected behavior**
+What did you expected to happen?
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**System (please complete the following information):**
+ - OS:
+ - Python version: 
+ - OCRmyPDF version:
+
+**Additional context**
+Add any other context about the problem here.
@@ -1,6 +1,6 @@
 ---
-name: Bug report
-about: Create a report to help us improve
+name: Problem with a specific input file
+about: Something went wrong while trying to OCR a specific file
 title: ''
 labels: ''
 assignees: ''
@@ -20,13 +20,13 @@ ocrmypdf  ...arguments... input.pdf output.pdf
 Run with verbosity or higher `-v1` to see more detailed logging. This information may be helpful.

 **Example file**
-Include an input PDF or image that demonstrates your issue.
+If your issue is a problem that affects only certain files, and we will require an input file (PDF or image) that demonstrates your issue.

-Please provide an input file with no personal or confidential information. At your option you may `GPG-encrypt the file <https://github.com/jbarlow83/OCRmyPDF/wiki>` for OCRmyPDF's author only.
+Please provide an input file with no personal or confidential information. At your option you may [GPG-encrypt the file](https://github.com/jbarlow83/OCRmyPDF/wiki) for OCRmyPDF's author only.

 Links to files hosted elsewhere are perfectly acceptable. You could also look in ``tests/resources`` and see if any of those files reproduce your issue.

-(Exceptions: Issues with installation, command line argument parsing, test suite failures.Issues without example files usually cannot be resolved.)
+*(Issues without example files usually cannot be resolved. It's like reporting an issue against a web browser without providing a URL.)*

 **Expected behavior**
 A clear and concise description of what you expected to happen.
@@ -2,7 +2,7 @@
 name: Feature request
 about: Suggest an idea for this project
 title: ''
-labels: enhancement
+labels: ''
 assignees: ''

 ---
@@ -13,5 +13,8 @@ A clear and concise description of what the problem is. Ex. I'm always frustrate
 **Describe the solution you'd like**
 A clear and concise description of what you want to happen.

+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
 **Additional context**
 Add any other context or screenshots about the feature request here.
@@ -1,33 +0,0 @@
-**Describe the issue**
-A clear and concise description of what the issue is.
-
-**To Reproduce**
-What command line were you trying to run?
-
-```bash
-ocrmypdf  ...arguments... input.pdf output.pdf
-```
-
-**Example file**
-Please include an example *input* PDF (or image). The input file is more helpful.
-
-Please check any or all that apply about the test file:
-
- [ ] This is the input file
- [ ] The file contains no personal or confidential information
- [ ] I am the copyright holder for this file
- [ ] I permit this file to be included in the OCRmyPDF test suite under the CC-BY-SA 4.0 license
- [ ] I am not the copyright holder, but this file is available under a free software license
-
-Files that are not free for inclusion in this project are quite welcome, but we like to collect free files for our test suite when possible. Please do *not* submit files with confidential information. At your option you may encrypt files for OCRmyPDF's author only.
-
-**Expected behavior**
-A clear and concise description of what you expected to happen. Include screenshots if applicable.
-
-**System:**
-
- OS: [e.g. Linux, macOS]
- OCRmyPDF Version: [e.g. v7.4.0]
-
-**Additional context**
-Add any other context about the problem here.
@@ -7,6 +7,7 @@
 !.gitignore
 !.pre-commit-config.yaml
 !.readthedocs.yml
+!.github/

 # Dev scratch
 *.ipynb
@@ -1,6 +1,6 @@
 repos:
  - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v2.4.0
+    rev: v3.1.0
    hooks:
      - id: check-case-conflict
      - id: check-merge-conflict
@@ -8,16 +8,16 @@ repos:
      - id: check-yaml
      - id: debug-statements
  - repo: https://github.com/asottile/seed-isort-config
-    rev: v1.9.3
+    rev: v2.2.0
    hooks:
      - id: seed-isort-config
  - repo: https://github.com/pre-commit/mirrors-isort
-    rev: v4.3.21 # pick the isort version you'd like to use from https://github.com/pre-commit/mirrors-isort/releases
+    rev: v5.0.5 # pick the isort version you'd like to use from https://github.com/pre-commit/mirrors-isort/releases
    hooks:
      - id: isort
  - repo: https://github.com/psf/black
-    rev: stable
+    rev: 19.10b0
    hooks:
      - id: black
-        language_version: python3.7
+        language_version: python
        exclude: ^src/ocrmypdf/lib/_leptonica.py
@@ -3,15 +3,10 @@
 [![Build Status][azure]](https://dev.azure.com/jim0585/ocrmypdf/_build/latest?definitionId=2&branchName=master) [![PyPI version][pypi]](https://pypi.org/project/ocrmypdf/) ![Homebrew version][homebrew] ![ReadTheDocs][docs] ![Python versions][pyversions]

 [azure]: https://dev.azure.com/jim0585/ocrmypdf/_apis/build/status/jbarlow83.OCRmyPDF?branchName=master
-
 [travis]: https://travis-ci.org/jbarlow83/OCRmyPDF.svg?branch=master "Travis build status"
-
 [pypi]: https://img.shields.io/pypi/v/ocrmypdf.svg "PyPI version"
-
 [homebrew]: https://img.shields.io/homebrew/v/ocrmypdf.svg "Homebrew version"
-
 [docs]: https://readthedocs.org/projects/ocrmypdf/badge/?version=latest "RTD"
-
 [pyversions]: https://img.shields.io/pypi/pyversions/ocrmypdf "Supported Python versions"

 OCRmyPDF adds an OCR text layer to scanned PDF files, allowing them to be searched or copy-pasted.
@@ -30,8 +25,7 @@ ocrmypdf                      # it's a scriptable command line program

 [See the release notes for details on the latest changes](https://ocrmypdf.readthedocs.io/en/latest/release_notes.html).

-Main features
-------------
+## Main features

 - Generates a searchable [PDF/A](https://en.wikipedia.org/?title=PDF/A) file from a regular PDF
 - Places OCR text accurately below the image to ease copy / paste
@@ -47,8 +41,7 @@ Main features

 For details: please consult the [documentation](https://ocrmypdf.readthedocs.io/en/latest/).

-Motivation
----------
+## Motivation

 I searched the web for a free command line tool to OCR PDF files: I found many, but none of them were really satisfying:

@@ -62,8 +55,7 @@ I searched the web for a free command line tool to OCR PDF files: I found many,

 ...so I decided to develop my own tool.

-Installation
------------
+## Installation

 Linux, Windows, macOS and FreeBSD are supported. Docker images are also available.

@@ -87,8 +79,7 @@ brew install ocrmypdf

 For everyone else, [see our documentation](https://ocrmypdf.readthedocs.io/en/latest/installation.html) for installation steps.

-Languages
---------
+## Languages

 OCRmyPDF uses Tesseract for OCR, and relies on its language packs. For Linux users, you can often find packages that provide language packs:

@@ -101,12 +92,14 @@ apt-get install tesseract-ocr-chi-sim  # Example: Install Chinese Simplified lan

 # Arch Linux users
 pacman -S tesseract-data-eng tesseract-data-deu # Example: Install the English and German language packs
+
+# brew macOS users
+brew install tesseract-lang
 ```

 You can then pass the `-l LANG` argument to OCRmyPDF to give a hint as to what languages it should search for. Multiple languages can be requested.

-Documentation and support
-------------------------
+## Documentation and support

 Once OCRmyPDF is installed, the built-in help which explains the command syntax and options can be accessed via:

@@ -118,35 +111,35 @@ Our [documentation is served on Read the Docs](https://ocrmypdf.readthedocs.io/e

 Please report issues on our [GitHub issues](https://github.com/jbarlow83/OCRmyPDF/issues) page, and follow the issue template for quick response.

-Requirements
------------
+## Requirements

 In addition to the required Python version (3.6+), OCRmyPDF requires external program installations of Ghostscript, Tesseract OCR, QPDF, and Leptonica. OCRmyPDF is pure Python, but uses CFFI to portably generate library bindings. OCRmyPDF works on pretty much everything: Linux, macOS, Windows and FreeBSD.

-Press & Media
-------------
+## Press & Media

 - [Going paperless with OCRmyPDF](https://medium.com/@ikirichenko/going-paperless-with-ocrmypdf-e2f36143f46a)
 - [Converting a scanned document into a compressed searchable PDF with redactions](https://medium.com/@treyharris/converting-a-scanned-document-into-a-compressed-searchable-pdf-with-redactions-63f61c34fe4c)
 - [c't 1-2014, page 59](https://heise.de/-2279695): Detailed presentation of OCRmyPDF v1.0 in the leading German IT magazine c't
 - [heise Open Source, 09/2014: Texterkennung mit OCRmyPDF](https://heise.de/-2356670)
 - [heise Durchsuchbare PDF-Dokumente mit OCRmyPDF erstellen](https://www.heise.de/ratgeber/Durchsuchbare-PDF-Dokumente-mit-OCRmyPDF-erstellen-4607592.html)
+- [Excellent Utilities: OCRmyPDF](https://www.linuxlinks.com/excellent-utilities-ocrmypdf-add-ocr-text-layer-scanned-pdfs/)

-Business enquiries
------------------
+## Business enquiries

 OCRmyPDF would not be the software that it is today without companies and users choosing to provide support for feature development and consulting enquiries. We are happy to discuss all enquiries, whether for extending the existing feature set, or integrating OCRmyPDF into a larger system.

-License
-------
+## License

-The OCRmyPDF software is licensed under the GNU GPLv3. Certain files are covered by other licenses, as noted in their source files.
+The OCRmyPDF software is licensed under the Mozilla Public License 2.0
+(MPL-2.0). This license permits integration of OCRmyPDF with other code,
+included commercial and closed source, but asks you to publish source-level
+modifications you make to OCRmyPDF.

-The license for each test file varies, and is noted in tests/resources/README.rst. The documentation is licensed under Creative Commons Attribution-ShareAlike 4.0 (CC-BY-SA 4.0).
+Some components of OCRmyPDF have other licenses, as noted in those files and the
+``debian/copyright`` file. Most files in ``misc/`` use the MIT license, and the
+documentation and test files are generally licensed under Creative Commons
+ShareAlike 4.0 (CC-BY-SA 4.0).

-OCRmyPDF versions prior to 6.0 were distributed under the MIT License.
-
-Disclaimer
----------
+## Disclaimer

 The software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -149,12 +149,6 @@ stages:
      - job: "macOS_Mojave"
        pool:
          vmImage: "macos-10.14"
-        strategy:
-          matrix:
-            Python37:
-              python.version: "3.7"
-            # Python38:
-            #   python.version: "3.8"
        steps:
          # https://github.com/actions/virtual-environments/issues/664
          # - task: UsePythonVersion@0
@@ -162,7 +156,10 @@ stages:
          #     versionSpec: "$(python.version)"
          - bash: |
              brew update
-              brew unlink python@2
+              brew upgrade python
+              echo "Using `python3 --version`"
+            displayName: "Update brew and Python"
+          - bash: |
              brew install \
                exempi \
                ghostscript \
@@ -170,9 +167,7 @@ stages:
                leptonica \
                openjpeg \
                pngquant \
-                python \
-                tesseract \
-                unpaper
+                tesseract
            displayName: "Install system packages"
          - bash: |
              pip3 install --upgrade pip
@@ -2,35 +2,70 @@ Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: OCRmyPDF
 Upstream-Contact: James R. Barlow <barlow.jim@gmail.com>
 Source: https://github.com/jbarlow83/OCRmyPDF
-Files-Excluded: tests/resources/milk.pdf

 Files: *
 Copyright:
- (C) 2013-2017 The OCRmyPDF Authors
- (C) 2013-2016, 2015-2017 2016, 2017, 2017-2018, 2018 James R. Barlow
-License: GPL-3+
+ (C) 2013-2015 Julien Pfefferkorn
+ (C) 2015-2020 James R. Barlow
+ (C) 2019 Martin Wind
+License: MPL-2.0
+
+Files: misc/*
+Copyright:
+ (C) 2020 James R. Barlow
+License: Expat
+
+Files: misc/completion/ocrmypdf.bash
+Copyright:
+ (C) 2019 Frank Pille
+ (C) 2020 Alex Willner
+License: Expat
+
+Files: misc/completion/ocrmypdf.fish
+Copyright:
+ (C) 2020 James R. Barlow
+License: Expat
+
+Files: misc/batch.py
+Copyright:
+ (C) 2016 findingorder: https://github.com/findingorder
+License: Expat
+
+Files: misc/synology.py
+Copyright:
+ (C) github.com/Enantiomerie
+License: Expat
+
+Files: misc/watcher.py
+Copyright:
+ (C) 2019 Ian Alexander: https://github.com/ianalexander
+ (C) 2020 James R. Barlow
+License: Expat
+
+Files: misc/webservice.py
+Copyright: (C) 2019 James R. Barlow
+License: AGPL-3+

 Files: docs tests/resources/*
 Copyright: (C) 2013-2018 James R. Barlow
 License: CC-BY-SA-4.0

+Files: docs/images/bitmap_vs_svg.svg
+Copyright: (C) 2006 Yug
+License: CC-BY-SA-2.5
+
 Files: src/ocrmypdf/hocrtransform.py
 Copyright: (C) 2010 Jonathan Brinley <jonathanbrinley@gmail.com>
 (C) 2013-14 Julien Pfefferkorn
 (C) 2015-16 James R. Barlow
 License: Expat

-Files: src/ocrmypdf/pdfa.py
-Copyright: (C) 2015 James R. Barlow
- (C) 1986-2017 The authors of GhostScript
-License: GPL-3+
-
 Files: src/ocrmypdf/_unicodefun.py
 Copyright: (C) 2014 Armin Ronacher
 (C) 2017 James R. Barlow
 License: BSD-3-clause

-Files: tests/spoof/*
+Files: tests/plugins/*
 Copyright: (C) 2016, 2017, 2016-2018 James R. Barlow
 License: Expat

@@ -79,15 +114,20 @@ Copyright: held by the contributors to the Wikipedia article "Optical character
 (epson.pdf generated from Wikipedia article as of 2016-09-14)
 License: CC-BY-SA-3.0

-Files: tests/resources/typewriter.png tests/resources/2400dpi.pdf tests/resources/3small.pdf
+Files: tests/resources/typewriter.png tests/resources/2400dpi.pdf
 Copyright: (C) 2005 Ellywa
 License: GFDL-1.2+ or CC-BY-SA-1.0 or CC-BY-SA-2.0 or CC-BY-SA-2.5 or CC-BY-SA-3.0
+Comment:
+ Obtained from: https://commons.wikimedia.org/wiki/File:Triumph.typewriter_text_Linzensoep.gif

 Files: tests/resources/overlay.pdf
 Copyright: (C) 2017 Max Anderson
 License: Expat

-Files: tests/resources/baiona*.png tests/resources/3small.pdf
+Files:
+ tests/resources/baiona*.png
+ tests/resources/baiona*.jpg
+ tests/resources/link.pdf
 Copyright: (C) 2014 Euskaldunaa
 License: CC-BY-SA-4.0

@@ -95,6 +135,13 @@ Files: tests/resources/vector.pdf
 Copyright: (C) 2018 Catscratch
 License: Expat

+Files: tests/resources/3small.pdf
+Copyright: (C) 2014 Euskaldunaa
+ (C) 2017 James R. Barlow
+ (C) 2005 Ellywa
+License: CC-BY-SA-4.0 and (GFDL-1.2+ or CC-BY-SA-1.0 or CC-BY-SA-2.0 or CC-BY-SA-2.5 or CC-BY-SA-3.0)
+Comment: concatenation of baiona_gray.png, crom.png and typewriter.png/2400dpi.pdf
+
 Files: src/ocrmypdf/data/sRGB.icc
 Copyright:  Kai-Uwe Behrmann <www.behrmann.name>
            Marti Maria <www.littlecms.com>
@@ -107,6 +154,13 @@ Files: debian/*
 Copyright: (C) 2016 Sean Whitton <spwhitton@spwhitton.name>
 License: GPL-3+

+License: MPL-2.0
+ This Source Code Form is subject to the terms of the Mozilla Public
+ License, v. 2.0.
+ .
+ On Debian systems the full text of the MPL-2.0 can be found in
+ /usr/share/common-licenses/MPL-2.0.
+
 License: GPL-3+
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -124,6 +178,669 @@ License: GPL-3+
 On Debian systems, the complete text of the GNU General
 Public License version 3 can be found in "/usr/share/common-licenses/GPL-3".

+License: AGPL-3+
+                     GNU AFFERO GENERAL PUBLIC LICENSE
+                        Version 3, 19 November 2007
+ .
+  Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+  Everyone is permitted to copy and distribute verbatim copies
+  of this license document, but changing it is not allowed.
+ .
+                             Preamble
+ .
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+ software and other kinds of works, specifically designed to ensure
+ cooperation with the community in the case of network server software.
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+   The licenses for most software and other practical works are designed
+ to take away your freedom to share and change the works.  By contrast,
+ our General Public Licenses are intended to guarantee your freedom to
+ share and change all versions of a program--to make sure it remains free
+ software for all its users.
+ .
+   When we speak of free software, we are referring to freedom, not
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+ have the freedom to distribute copies of free software (and charge for
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+ .
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+
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@@ -51,6 +51,10 @@ Forking a child process to call ``ocrmypdf.ocr()`` is suggested. That
 way your application will survive and remain interactive even if
 OCRmyPDF does not.

+Programs that call ``ocrmypdf.ocr()`` should also install a SIGBUS signal
+handler (except on Windows), to raise an exception if access to a memory
+mapped file fails. OCRmyPDF may use memory mapping.
+
 .. warning::

    On Windows, the script that calls ``ocrmypdf.ocr()`` must be protected
@@ -106,7 +110,3 @@ Reference
    :undoc-members:

 .. autofunction:: ocrmypdf.configure_logging
-
-.. automodule:: ocrmypdf.exceptions
-    :members:
-    :undoc-members:
@@ -0,0 +1,43 @@
+=============
+API Reference
+=============
+
+This page summarizes the rest of the public API. Generally speaking this
+should mainly of interest to plugin developers.
+
+ocrmypdf.exceptions
+===================
+
+.. automodule:: ocrmypdf.exceptions
+    :members:
+    :undoc-members:
+
+ocrmypdf.helpers
+================
+
+.. automodule:: ocrmypdf.helpers
+    :members:
+
+ocrmypdf.hocrtransform
+======================
+
+.. automodule:: ocrmypdf.hocrtransform
+    :members:
+
+ocrmypdf.pdfa
+=============
+
+.. automodule:: ocrmypdf.pdfa
+    :members:
+
+ocrmypdf.quality
+================
+
+.. automodule:: ocrmypdf.quality
+    :members:
+
+ocrmypdf.subprocess
+===================
+
+.. automodule:: ocrmypdf.subprocess
+    :members:
@@ -127,7 +127,7 @@ Users may need to customize the script to meet their requirements.
    "OCR_ON_SUCCESS_DELETE", "This will delete the input file if the exit code is 0 (OK)"
    "OCR_OUTPUT_DIRECTORY_YEAR_MONTH", "This will place files in the output in ``{output}/{year}/{month}/{filename}``"
    "OCR_DESKEW", "Apply deskew to crooked input PDFs"
-    "OCR_JSON_SETTINGS", "A JSON string specifying any other arguments for ``ocrmypdf.ocr``"
+    "OCR_JSON_SETTINGS", "A JSON string specifying any other arguments for ``ocrmypdf.ocr``, e.g. ``'OCR_JSON_SETTINGS={"rotate_pages": true}'``.
    "OCR_POLL_NEW_FILE_SECONDS", "Polling interval"
    "OCR_LOGLEVEL", "Level of log messages to report"

@@ -1,5 +1,4 @@
 #!/usr/bin/env python3
-# -*- coding: utf-8 -*-
 #
 # ocrmypdf documentation build configuration file, created by
 # sphinx-quickstart on Sun Sep  4 14:29:43 2016.
@@ -21,6 +20,8 @@
 # import sys
 # sys.path.insert(0, os.path.abspath('.'))

+"""isort:skip_file"""
+
 # -- General configuration ------------------------------------------------

 # If your documentation needs a minimal Sphinx version, state it here.
@@ -32,6 +33,8 @@
 # ones.
 extensions = ['sphinx.ext.napoleon']

+napoleon_use_rtype = False
+
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']

@@ -51,7 +54,7 @@ master_doc = 'index'
 # General information about the project.
 project = 'ocrmypdf'
 copyright = (
-    '2019, James R. Barlow. Licensed under Creative Commons Attribution-ShareAlike 4.0.'
+    '2020, James R. Barlow. Licensed under Creative Commons Attribution-ShareAlike 4.0.'
 )
 author = 'James R. Barlow'

@@ -90,6 +93,7 @@ from pkg_resources import get_distribution, DistributionNotFound
 release = get_distribution('ocrmypdf').version
 version = '.'.join(release.split('.')[:2])

+
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
 #
@@ -174,7 +178,7 @@ html_theme_options = {'display_version': False}
 # The name of an image file (relative to this directory) to place at the top
 # of the sidebar.
 #
-# html_logo = None
+# html_logo = "images/logo.svg"  # looks bad

 # The name of an image file (relative to this directory) to use as a favicon of
 # the docs.  This file should be a Windows icon file (.ico) being 16x16 or 32x32
@@ -32,7 +32,8 @@ If you are proposing a change that will require a new Python dependency, we
 prefer dependencies that are already packaged by Debian or Red Hat. This makes
 life much easier for our downstream package maintainers.

-Python dependencies must also be GPLv3 compatible.
+Python dependencies must also be license-compatible. GPLv3 or AGPLv3 are likely
+incompatible with the project's license, but LGPLv3 is compatible.

 New non-Python dependencies
 ===========================
@@ -55,3 +56,12 @@ of that platform.

 Packager maintainers, please ensure that the command line completion scripts in
 ``misc/`` are installed.
+
+Copyright and license
+=====================
+
+For contributions over 10 lines of code, please include your name to list of
+copyright holders for that file. The core program is licensed under MPL-2.0,
+test files and documentation under CC-BY-SA 4.0, and miscellaneous files under
+MIT. Please contribute code only that you wrote and you have the permission to
+contribute or license to us.
@@ -163,8 +163,7 @@ complete. This may entail setting a long timeout; this interface is more
 useful for internal HTTP API calls.

 Unlike the rest of OCRmyPDF, this web service is licensed under the
-Affero GPLv3 (AGPLv3) since Ghostscript, a dependency of OCRmyPDF, is
-also licensed in this way.
+Affero GPLv3 (AGPLv3) since Ghostscript is also licensed in this way.

 In addition to the above, please read our
 :ref:`general remarks on using OCRmyPDF as a service <ocr-service>`.
@@ -36,6 +36,7 @@ image processing and OCR to existing PDFs.

   api
   plugins
+   apiref
   contributing

 Indices and tables
@@ -8,20 +8,26 @@ Installing OCRmyPDF
 |latest|

 The easiest way to install OCRmyPDF is to follow the steps for your operating
-system/platform, although sometimes this version may be out of date. This
-installation guide provides information allowing you to compare the current
-version to the one provided by your platform.
+system/platform. This version may be out of date, however.

-If you want to use the latest version of OCRmyPDF and all of its optional
-dependencies, the easiest way to get that is install the Homebrew package. Homebrew
-is best known as a macOS package manger, but also works for
-`Linux and Windows Subsystem for Linux <https://docs.brew.sh/Homebrew-on-Linux>`__.
-After Homebrew is installed, simply run ``brew install ocrmypdf``.
+These platforms have one-liner installs:

-You can also use the more detailed procedures here to manually install OCRmyPDF
-from source or with the ``pip`` package manager for binary wheels. The reason
-for these varied steps is that OCRmyPDF requires third-party executables that are
-not part of Python.
+-----------------------------+-------------------------------+
+| Debian, Ubuntu              | ``apt install ocrmypdf``      |
+-----------------------------+-------------------------------+
+| Windows Subsystem for Linux | ``apt install ocrmypdf``      |
+-----------------------------+-------------------------------+
+| Fedora                      | ``dnf install ocrmypdf``      |
+-----------------------------+-------------------------------+
+| macOS                       | ``brew install ocrmypdf``     |
+-----------------------------+-------------------------------+
+| LinuxBrew                   | ``brew install ocrmypdf``     |
+-----------------------------+-------------------------------+
+| FreeBSD                     | ``pkg install py37-ocrmypdf`` |
+-----------------------------+-------------------------------+
+
+More detailed procedures are outlined below. If you want to do a manual
+install, or install a more recent version than your platform provides, read on.

 .. contents:: Platform-specific steps
    :depth: 2
@@ -58,7 +64,7 @@ Debian and Ubuntu 18.04 or newer
 | |ubu-1804| |ubu-2004|                         |
 +-----------------------------------------------+

-Users of Debian 9 ("stretch") or later or Ubuntu 18.04 or later, including users
+Users of Debian 9 ("stretch") or later, or Ubuntu 18.04 or later, including users
 of Windows Subsystem for Linux, may simply

 .. code-block:: bash
@@ -87,11 +93,11 @@ For full details on version availability for your platform, check the
 Fedora 29 or newer
 ------------------

-.. |fedora-29| image:: https://repology.org/badge/version-for-repo/fedora_29/ocrmypdf.svg
-    :alt: Fedora 29
+.. |fedora-31| image:: https://repology.org/badge/version-for-repo/fedora_31/ocrmypdf.svg
+    :alt: Fedora 31

-.. |fedora-30| image:: https://repology.org/badge/version-for-repo/fedora_30/ocrmypdf.svg
-    :alt: Fedora 30
+.. |fedora-32| image:: https://repology.org/badge/version-for-repo/fedora_32/ocrmypdf.svg
+    :alt: Fedora 32

 .. |fedora-rawhide| image:: https://repology.org/badge/version-for-repo/fedora_rawhide/ocrmypdf.svg
    :alt: Fedore Rawhide
@@ -101,7 +107,7 @@ Fedora 29 or newer
 +-----------------------------------------------+
 | |latest|                                      |
 +-----------------------------------------------+
-| |fedora-29| |fedora-30| |fedora-rawhide|      |
+| |fedora-31| |fedora-32| |fedora-rawhide|      |
 +-----------------------------------------------+

 Users of Fedora 29 or later may simply
@@ -162,7 +168,7 @@ To install for the current user only:
    pip3 install --user ocrmypdf

 Ubuntu 18.04 LTS
-------------------------------------------------
+----------------

 Ubuntu 18.04 includes ocrmypdf 6.1.2 - you can install that with ``apt``, but
 it is quite old now. To install a more recent version, uninstall the old version
@@ -184,7 +190,8 @@ of ocrmypdf, and install the following dependencies:
        python3-reportlab \
        qpdf \
        tesseract-ocr \
-        zlib1g
+        zlib1g \
+        unpaper

 We will need a newer version of ``pip`` then was available for Ubuntu 18.04:

@@ -265,68 +272,6 @@ environment variable contains ``$HOME/.local/bin``.

 To add JBIG2 encoding, see :ref:`jbig2`.

-Ubuntu 14.04 LTS
----------------
-
-Installing on Ubuntu 14.04 LTS (trusty) is more difficult than some
-other options, because of its age. Several backports are required. For
-explanations of some steps of this procedure, see the similar steps for
-Ubuntu 16.04.
-
-Install system dependencies:
-
-.. code-block:: bash
-
-    sudo apt-get update
-    sudo apt-get install \
-        software-properties-common python-software-properties \
-        zlib1g-dev \
-        libexempi3 \
-        libjpeg-dev \
-        libffi-dev \
-        pngquant \
-        qpdf
-
-We will need backports of Ghostscript 9.16, libav-11 (for unpaper 6.1),
-Tesseract 4.00 (alpha), and Python 3.6. This will replace Ghostscript
-and Tesseract 3.x on your system. Python 3.6 will be installed alongside
-the system Python 3.4.
-
-If you prefer to not modify your system in this matter, consider using a
-Docker container.
-
-.. code-block:: bash
-
-    sudo add-apt-repository ppa:vshn/ghostscript -y
-    sudo add-apt-repository ppa:heyarje/libav-11 -y
-    sudo add-apt-repository ppa:alex-p/tesseract-ocr -y
-    sudo add-apt-repository ppa:jonathonf/python-3.6 -y
-
-    sudo apt-get update
-
-    sudo apt-get install \
-        python3.6-dev \
-        ghostscript \
-        tesseract-ocr \
-        tesseract-ocr-eng \
-        libavformat56 libavcodec56 libavutil54 \
-        wget
-
-Now we need to install ``pip`` and let it install ocrmypdf:
-
-.. code-block:: bash
-
-    curl https://bootstrap.pypa.io/ez_setup.py -o - | python3.6 && python3.6 -m easy_install pip
-    pip3.6 install ocrmypdf
-
-The optional dependency ``unpaper`` is only available at 0.4.2 in Ubuntu 14.04,
-and no backports are available. Previously the author maintained a backported
-.deb package for unpaper 6.1, but since Ubuntu 14.04 is now end of life, this is
-not supported. As such, ``unpaper`` is not available on Ubuntu 14.04 or must by
-compiled by hand.
-
-To add JBIG2 encoding, see :ref:`jbig2`.
-
 Arch Linux (AUR)
 ----------------

@@ -407,6 +352,43 @@ To install OCRmyPDF for Alpine Linux:

    apk add ocrmypdf

+Mageia 7
+--------
+
+Install the following dependencies:
+
+.. code-block:: bash
+
+    # As root user
+    urpmi.update -a
+    urpmi \
+        ghostscript \
+        icc-profiles-openicc \
+        jbig2dec \
+        lib64leptonica5 \
+        pngquant \
+        python3-pip \
+        python3-cffi \
+        python3-distutils-extra \
+        python3-pkg-resources \
+        python3-reportlab \
+        qpdf \
+        tesseract \
+        tesseract-osd \
+        tesseract-eng \
+        tesseract-fra
+
+To install ocrmypdf for the system:
+
+    # As root user
+    pip3 install ocrmypdf
+    ldconfig
+
+Or, to install for the current user only:
+
+    export PATH=$HOME/.local/bin:$PATH
+    pip3 install --user ocrmypdf
+
 Other Linux packages
 --------------------

@@ -507,40 +489,15 @@ The command line program should now be available:

    ocrmypdf --help

-Installing on FreeBSD
-=====================
-
-.. image:: https://repology.org/badge/version-for-repo/freebsd/python:ocrmypdf.svg
-    :alt: FreeBSD
-    :target: https://repology.org/project/python:ocrmypdf/versions
-
-FreeBSD 11.3, 12.0, 12.1-RELEASE and 13.0-CURRENT are supported. Other
-versions likely work but have not been tested.
-
-.. code-block:: bash
-
-    pkg install py37-ocrmypdf
-
-To install a more recent version, you could attempt to first install the system
-version with ``pkg``, then use ``pip install --user ocrmypdf``.
-
-Installing the Docker image
-===========================
-
-For some users, installing the Docker image will be easier than
-installing all of OCRmyPDF's dependencies.
-
-See `OCRmyPDF Docker Image <docker>`__ for more information.
-
 Installing on Windows
 =====================

-.. warning::
+Native Windows
+--------------

-    Native Windows support is new. Consider it "beta" software. Some
-    functionality is missing or may be more difficult to enable. If you need a
-    production-ready solution, use Windows Subsystem for Linux or a Docker
-    image.
+.. note::
+
+    It is easier to install OCRmyPDF on Windows Subsystem for Linux.

 .. note::

@@ -548,7 +505,7 @@ Installing on Windows

 You must install the following for Windows:

-* Python 3.7 (64-bit)
+* Python 3.7 (64-bit) or later
 * Tesseract 4.0 or later
 * Ghostscript 9.50 or later

@@ -577,8 +534,8 @@ You may then use pip to install ocrmypdf:

 * ``pip install ocrmypdf``

-Installing on Windows Subsystem for Linux
-=========================================
+Windows Subsystem for Linux
+---------------------------

 #. Install Ubuntu 18.04 for Windows Subsystem for Linux, if not already installed.
 #. Follow the procedure to install :ref:`OCRmyPDF on Ubuntu 18.04 <ubuntu-lts-latest>`.
@@ -597,14 +554,8 @@ Then confirm that the expected version from PyPI (|latest|) is installed:
 You can then run OCRmyPDF in the Windows command prompt or Powershell, prefixing
 ``wsl``, and call it from Windows programs or batch files.

-Docker
-^^^^^^
-
-You can also :ref:`Install the Docker <docker-install>` container on Windows. Ensure that
-your command prompt can run the docker "hello world" container.
-
-Installing on Cygwin64 under Windows
-====================================
+Cygwin64
+--------

 First install the the following prerequisite Cygwin packages using ``setup-x86_64.exe``::

@@ -650,6 +601,37 @@ The optional dependency "unpaper" that is currently not available under Cygwin.
 Without it, certain options such as ``--clean`` will produce an error message.
 However, the OCR-to-text-layer functionality is available.

+Docker
+------
+
+You can also :ref:`Install the Docker <docker-install>` container on Windows. Ensure that
+your command prompt can run the docker "hello world" container.
+
+Installing on FreeBSD
+=====================
+
+.. image:: https://repology.org/badge/version-for-repo/freebsd/python:ocrmypdf.svg
+    :alt: FreeBSD
+    :target: https://repology.org/project/python:ocrmypdf/versions
+
+FreeBSD 11.3, 12.0, 12.1-RELEASE and 13.0-CURRENT are supported. Other
+versions likely work but have not been tested.
+
+.. code-block:: bash
+
+    pkg install py37-ocrmypdf
+
+To install a more recent version, you could attempt to first install the system
+version with ``pkg``, then use ``pip install --user ocrmypdf``.
+
+Installing the Docker image
+===========================
+
+For some users, installing the Docker image will be easier than
+installing all of OCRmyPDF's dependencies.
+
+See `OCRmyPDF Docker Image <docker>`__ for more information.
+
 Installing with Python pip
 ==========================

@@ -684,6 +666,13 @@ instead use this for a system wide installation:

    pip3 install ocrmypdf

+.. note::
+
+    AArch64 (ARM64) users: this process will be difficult because most
+    Python packages are not available as binary wheels for your platform.
+    You're probably better off using a platform install on Debian, Ubuntu,
+    or Fedora.
+
 Requirements for pip and HEAD install
 -------------------------------------

@@ -186,6 +186,11 @@ Ghostscript also imposes some limitations:
 -  Ghostscript's PDF/A conversion removes any XMP metadata that is not
   one of the standard XMP metadata namespaces for PDFs. In particular,
   PRISM Metdata is removed.
+-  Ghostscript's PDF/A conversion seems to remove or deactivate
+   hyperlinks and other active content.
+
+You can use ``--output-type pdf`` to disable PDF/A conversion and produce
+a standard, non-archival PDF.

 Regarding OCRmyPDF itself:

@@ -64,7 +64,7 @@ malicious user could upload a chosen PDF. In particular, it is not
 necessarily secure against PDF malware or PDFs that cause denial of
 service. OCRmyPDF relies on Ghostscript, and therefore, if deployed
 online one should be prepared to comply with Ghostscript's Affero GPL
-license, OCRmyPDF's GPL license, and any other licenses.
+license, and any other licenses.

 Setting aside these concerns, a side effect of OCRmyPDF is it may
 incidentally sanitize PDFs that contain certain types of malware. It
@@ -2,6 +2,11 @@
 Plugins
 =======

+    The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL
+    NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED",  "MAY", and
+    "OPTIONAL" in this document are to be interpreted as described in
+    RFC 2119.
+
 You can use plugins to customize the behavior of OCRmyPDF at certain points of
 interest.

@@ -11,39 +16,34 @@ Currently, it is possible to:
 - override the decision for whether or not to perform OCR on a particular file
 - modify the image is about to be sent for OCR
 - modify the page image before it is converted to PDF
+- replace the Tesseract OCR with another OCR engine that has similar behavior
+- replace Ghostscript with another PDF to image converter (rasterizer) or
+  PDF/A generator

 OCRmyPDF plugins are based on the Python ``pluggy`` package and conform to its
 conventions. Note that: plugins installed with as setuptools entrypoints are
 not checked currently, because OCRmyPDF assumes you may not want to enable
-plugins for all files. Also, plugins must be functions, not classes.
-
-How plugins are imported
-========================
-
-Plugins are imported on demand, by the OCRmyPDF worker process that needs to use
-them. As such, plugins cannot share state with other plugins, cannot rely on
-their module's or the interpreter's global state, and should expect asynchronous
-copies of themselves to be running. Plugins can write intermediate files to the
-folder specified in ``options.work_folder``.
-
-Plugins should work whether executed in threads or processes.
+plugins for all files.

 Script plugins
 ==============

 Script plugins may be called from the command line, by specifying the name of a file.
+Script plugins may be convenient for informal or "one-off" plugins, when a certain
+batch of files needs a special processing step for example.

 .. code-block:: bash

-    ocrmypdf --plugin example_plugin.py input.pdf output.pdf
+    ocrmypdf --plugin ocrmypdf_example_plugin.py input.pdf output.pdf

-Multiple plugins may be called by issuing the ``--plugin`` argument multiple times.
+Multiple plugins may be installed by issuing the ``--plugin`` argument multiple times.

 Packaged plugins
 ================

 Installed plugins may be installed into the same virtual environment as OCRmyPDF
 is installed into. They may be invoked using Python standard module naming.
+If you are intending to distribute a plugin, please package it.

 .. code-block:: bash

@@ -59,10 +59,45 @@ as packaged plugins, and these modules should begin with the name ``ocrmypdf_``
 similar to ``pytest`` packages such as ``pytest-cov`` (the package) and
 ``pytest_cov`` (the module).

+.. note::
+
+    We strongly recommend plugin authors name their plugins with the prefix
+    ``ocrmypdf-`` (for the package name on PyPI) and ``ocrmypdf_`` (for the
+    module), just like pytest plugins.
+
+Plugin requirements
+===================
+
+OCRmyPDF generally uses multiple worker processes. When a new worker is started,
+Python will import all plugins again, including all plugins that were imported earlier.
+This means that the global state of a plugin in one worker will not be shared with
+other workers. As such, plugin hook implementations should be stateless, relying
+only on their inputs. Hook implementations may use their input parameters to
+to obtain a reference to shared state prepared by another hook implementation.
+Plugins must expect that other instances of the plugin will be running
+simultaneously.
+
+The ``context`` object that is passed to many hooks can be used to share information
+about a file being worked on. Plugins must write private, plugin-specific data to
+a subfolder named ``{options.work_folder}/ocrmypdf-plugin-name``. Plugins MAY
+read and write files in ``options.work_folder``, but should be aware that their
+semantics are subject to change.
+
+OCRmyPDF will delete ``options.work_folder`` when it has finished OCRing
+a file, unless invoked with ``--keep-temporary-files``.
+
+The documentation for some plugin hooks contain a detailed description of the
+execution context in which they will be called.
+
+Plugins should be prepared to work whether executed in worker threads or worker
+processes. Generally, OCRmyPDF uses processes, but has a semi-hidden threaded
+argument that simplifies debugging.
+
+
 Plugin hooks
 ============

-A plugin may provide the following hooks. Hooks should be decorated with
+A plugin may provide the following hooks. Hooks must be decorated with
 ``ocrmypdf.hookimpl``, for example:

 .. code-block:: python
@@ -73,8 +108,58 @@ A plugin may provide the following hooks. Hooks should be decorated with
    def add_options(parser):
        pass

-The following is a complete list of hooks that may be installed and when
+The following is a complete list of hooks that are available, and when
 they are called.

-.. automodule:: ocrmypdf.pluginspec
+.. _firstresult:
+
+**Note on firstresult hooks**
+
+If multiple plugins install implementations for this hook, they will be called in
+the reverse of the order in which they are installed (i.e., last plugin wins).
+When each hook implementation is called in order, the first implementation that
+returns a value other than ``None`` will "win" and prevent execution of all other
+hooks. As such, you cannot "chain" a series of plugin filters together in this
+way. Instead, a single hook implementation should be responsible for any such
+chaining operations.
+
+Custom command line arguments
+-----------------------------
+
+.. autofunction:: ocrmypdf.pluginspec.add_options
+
+.. autofunction:: ocrmypdf.pluginspec.check_options
+
+Applying special behavior before processing
+-------------------------------------------
+
+.. autofunction:: ocrmypdf.pluginspec.validate
+
+PDF page to image
+-----------------
+
+.. autofunction:: ocrmypdf.pluginspec.rasterize_pdf_page
+
+Modifying intermediate images
+-----------------------------
+
+.. autofunction:: ocrmypdf.pluginspec.filter_ocr_image
+
+.. autofunction:: ocrmypdf.pluginspec.filter_page_image
+
+OCR engine
+----------
+
+.. autofunction:: ocrmypdf.pluginspec.get_ocr_engine
+
+.. autoclass:: ocrmypdf.pluginspec.OcrEngine
    :members:
+
+    .. automethod:: __str__
+
+.. autoclass:: ocrmypdf.pluginspec.OrientationConfidence
+
+PDF/A production
+----------------
+
+.. autofunction:: ocrmypdf.pluginspec.generate_pdfa
@@ -12,9 +12,160 @@ may be unreliable. Use the API to depend on precise behavior.
 The public API may be useful in scripts that launch OCRmyPDF processes or that
 wish to use some of its features for working with PDFs.

-Note that it is licensed under GPLv3, so scripts that
-``import ocrmypdf`` and are released publicly should probably also be
-licensed under GPLv3.
+v11.3.2
+=======
+
+-  Explicitly require pikepdf 2.0.0 or newer when running on Python 3.9. (There are
+   concerns about the stability of pybind11 2.5.x with Python 3.9, which is used in
+   pikepdf 1.x.)
+-  Fixed another issue related to page rotation.
+-  Fixed an issue where image marked as image masks were not properly considered
+   as optimization candidates.
+-  On some systems, unpaper seems to be unable to process the PNGs we offer it
+   as input. We now convert the input to PNM format, which unpaper always accepts.
+   Fixes #665 and #667.
+-  DPI sent to unpaper is now rounded to a more reasonable number of decimal digits.
+-  Debug and error messages from unpaper were being suppressed.
+-  Some documentation tweaks.
+
+v11.3.1
+=======
+
+-  Declare support for new versions: pdfminer.six 20201018 and pikepdf 2.x
+-  Fix warning related to ``--pdfa-image-compression`` that appears at the wrong
+   time.
+
+v11.3.0
+=======
+
+-  The "OCR" step is describing as "Image processing" in the output messages when
+   OCR is disabled, to better explain the application's behavior.
+-  Debug logs are now only created when run as a command line, and not when OCR
+   is performed for an API call. It is the calling application's responsibility
+   to set up logging.
+-  For PDFs with a low number of pages, we gathered information about the input PDF
+   in a thread rather than process (when there are more pages). When run as a
+   thread, we did not close the file handle to the working PDF, leaking one file
+   handle per call of ``ocrmypdf.ocr``.
+-  Fixed an issue where debug messages send by child worker processes did not match
+   the log settings of parent process, causing messages to be dropped. This affected
+   macOS and Windows only where the parent process is not forked.
+-  Fixed the hookspec of rasterize_pdf_page to remove default parameters that
+   were not handled in an expected way by pluggy.
+-  Fixed another issue with automatic page rotation (#658) due to the issue above.
+
+v11.2.1
+=======
+
+-  Fixed an issue where optimization of a 1-bit image with a color palette or
+   associated ICC that was optimized to JBIG2 could have its colors inverted.
+
+v11.2.0
+=======
+
+-  Fixed an issue with optimizing PNG-type images that had soft masks or image masks.
+   This is a regression introduced in (or about) v11.1.0.
+-  Improved type checking of the ``plugins`` parameter for the ``ocrmypdf.ocr``
+   API call.
+
+v11.1.2
+=======
+
+-  Fixed hOCR renderer writing the text in roughly reverse order. This should not
+   affect reasonably smart PDF readers that properly locate the position of all
+   text, but may confuse those that rely on the order of objects in the content
+   stream. (#642)
+
+v11.1.1
+=======
+
+-  We now avoid using named temporary files when using pngquant allowing containerized
+   pngquant installs to be used.
+-  Clarified an error message.
+-  Highest number of 1's in a release ever!
+
+v11.1.0
+=======
+
+-  Fixed page rotation issues: #634, #589.
+-  Fixed some cases where optimization created an invalid image such as a
+   1-bit "RGB" image: #629, #620.
+-  Page numbers are now displayed in debug logs when pages are being grafted.
+-  ocrmypdf.optimize.rewrite_png and ocrmypdf.optimize.rewrite_png_as_g4 were
+   marked deprecated. Strictly speaking these should have been internal APIs,
+   but they were never hidden.
+-  As a precaution, pikepdf mmap-based file access has been disabled due to a
+   rare race condition that causes a crash when certain objects are deallocated.
+   The problem is likely in pikepdf's dependency pybind11.
+-  Extended the example plugin to demonstrate conversion to mono.
+
+v11.0.2
+=======
+
+-  Fixed issue #612, TypeError exception. Fixed by eliminating unnecessary repair of
+   input PDF metadata in memory.
+
+v11.0.1
+=======
+
+-  Blacklist pdfminer.six 20200720, which has a regression fixed in 20200726.
+-  Approve img2pdf 0.4 as it passes tests.
+-  Clarify that the GPL-3 portion of pdfa.py was removed with the changes in v11.0.0;
+   the debian/copyright file did not properly annotate this change.
+
+v11.0.0
+=======
+
+-  Project license changed to Mozilla Public License 2.0. Some miscellaneous
+   code is now under MIT license and non-code content/media remains under
+   CC-BY-SA 4.0. License changed with approval of all people who were found
+   to have contributed to GPLv3 licensed sections of the project. (#600)
+-  Because the license changed, this is being treated as a major version number
+   change; however, there are no known breaking changes in functional behavior
+   or API compared to v10.x.
+
+v10.3.3
+=======
+
+-  Fixed a "KeyError: 'dpi'" error message when using ``--threshold`` on an image.
+   (#607)
+
+v10.3.2
+=======
+
+-  Fixed a case where we reported "no reason" for a file size increase, when we
+   could determine the reason.
+-  Enabled support for pdfminer.six 20200726.
+
+v10.3.1
+=======
+
+-  Fixed a number of test suite failures with pdfminer.six older than veresion 20200402.
+-  Enabled support for pdfminer.six 20200720.
+
+v10.3.0
+=======
+
+-  Fixed an issue where we would consider images that were already JBIG2-encoded
+   for optimization, potentially producing a less optimized image than the original.
+   We do not believe this issue would ever cause an image to loss fidelity.
+-  Where available, pikepdf memory mapping is now used. This improves performance.
+-  When Leptonica 1.79+ is installed, use its new error handling API to avoid
+   a "messy" redirection of stderr which was necessary to capture its error
+   messages.
+-  For older versions of Leptonica, added a new thread level lock. This fixes a
+   possible race condition in handling error conditions in Leptonica (although
+   there is no evidence it ever caused issues in practice).
+-  Documentation improvements and more type hinting.
+
+v10.2.1
+=======
+
+-  Disabled calculation of text box order with pdfminer. We never needed this result
+   and it is expensive to calculate on files with complex pre-existing text.
+-  Fixed plugin manager to accept ``Path(plugin)`` as a path to a plugin.
+-  Fixed some typing errors.
+-  Documentation improvements.

 v10.2.0
 =======
@@ -332,7 +483,7 @@ v9.0.0

 -  Added a high level API for applications that want to integrate OCRmyPDF.
   Special thanks to Martin Wind (@mawi1988) whose made significant contributions
-   to this effort. OCRmyPDF is GPLv3-licensed.
+   to this effort.
 -  Added progress bars for long-running steps. ■■■■■■■□□
 -  We now create linearized ("fast web view") PDFs by default. The new parameter
   ``--fast-web-view`` provides control over when this feature is applied.
@@ -959,8 +1110,8 @@ v6.1.0
 v6.0.0
 ======

-  The software license has been changed to GPLv3. Test resource files
-   and some individual sources may have other licenses.
+-  The software license has been changed to GPLv3 [it has since changed again].
+   Test resource files and some individual sources may have other licenses.
 -  OCRmyPDF now depends on
   `PyMuPDF <https://pymupdf.readthedocs.io/en/latest/installation/>`__.
   Including PyMuPDF is the primary reason for the change to GPLv3.
@@ -1,5 +1,23 @@
 #!/usr/bin/env python3
-# Original version by DeliciousPickle@github; modified
+# Copyright 2016 findingorder: https://github.com/findingorder
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.

 # This script must be edited to meet your needs.

@@ -1,5 +1,26 @@
 # ocrmypdf completion                                     -*- shell-script -*-

+# Copyright 2019 Frank Pille
+# Copyright 2020 Alex Willner
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
 set -o errexit

 _ocrmypdf()
@@ -1,3 +1,23 @@
+# Copyright 2020 James R. Barlow
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
 complete -c ocrmypdf -x -n '__fish_is_first_arg' -l version
 complete -c ocrmypdf -x -n '__fish_is_first_arg' -s h -s "?" -l help

@@ -1,17 +1,41 @@
 # © 2020 James R Barlow: https://github.com/jbarlow83
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
 #
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
 #
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+"""
+An example of an OCRmyPDF plugin.
+
+This plugin adds two new command line arguments
+    --grayscale-ocr: converts the image to grayscale before performing OCR on it
+        (This is occasionally useful for images whose color confounds OCR. It only
+        affects the image shown to OCR. The image is not saved.)
+    --mono-page: converts pages all pages in the output file to black and white
+
+To use this from the command line:
+    ocrmypdf --plugin path/to/example_plugin.py --mono-page input.pdf output.pdf
+
+To use this as an API:
+    import ocrmypdf
+    ocrmypdf.ocr('input.pdf', 'output.pdf',
+        plugins=['path/to/example_plugin.py'], mono_page=True
+    )
+"""

 import logging

@@ -25,6 +49,7 @@ log = logging.getLogger(__name__)
@hookimpl
 def add_options(parser):
    parser.add_argument('--grayscale-ocr', action='store_true')
+    parser.add_argument('--mono-page', action='store_true')


@hookimpl
@@ -47,7 +72,13 @@ def filter_ocr_image(page, image):

@hookimpl
 def filter_page_image(page, image_filename):
-    output = image_filename.with_suffix('.jpg')
-    with Image.open(image_filename) as im:
-        im.save(output)
-    return output
+    if page.options.mono_page:
+        with Image.open(image_filename) as im:
+            im = im.convert('1')
+            im.save(image_filename)
+        return image_filename
+    else:
+        output = image_filename.with_suffix('.jpg')
+        with Image.open(image_filename) as im:
+            im.save(output)
+        return output
@@ -1,5 +1,23 @@
 #!/bin/env python3
-# Contributed by github.com/Enantiomerie
+# Copyright 2017 github.com/Enantiomerie
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.

 # This script must be edited to meet your needs.

@@ -1,18 +1,23 @@
 # Copyright (C) 2019 Ian Alexander: https://github.com/ianalexander
 # Copyright (C) 2020 James R Barlow: https://github.com/jbarlow83
 #
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
 #
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
 #
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.

 import json
 import logging
@@ -10,8 +10,7 @@ build-backend = "setuptools.build_meta"

 [tool.black]
 line-length = 88
-target-version = ["py36",
-"py37", "py38"]
+target-version = ["py36", "py37", "py38"]
 skip-string-normalization = true
 include = '\.pyi?$'
 exclude = '''
@@ -1,12 +1,12 @@
 # requirements.txt can be used to replicate the developer's build environment
 # setup.py lists a separate set of requirements that are looser to simplify
 # installation
-cffi == 1.14.0
+cffi == 1.14.3
 coloredlogs == 14.0  # technically optional
-img2pdf == 0.3.6
-pdfminer.six == 20200517
-pikepdf == 1.15.1
+img2pdf == 0.4.0
+pdfminer.six == 20201018
+pikepdf == 2.0.0
 pluggy == 0.13.1
-Pillow == 7.1.2
-reportlab == 3.5.42
-tqdm == 4.46.1
+Pillow == 8.0.1
+reportlab == 3.5.55
+tqdm == 4.51.0
@@ -2,20 +2,10 @@
 # -*- coding: utf-8 -*-
 # © 2015 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 from __future__ import print_function, unicode_literals

@@ -54,12 +44,13 @@ setup(
        "Programming Language :: Python :: 3.6",
        "Programming Language :: Python :: 3.7",
        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
        "Development Status :: 5 - Production/Stable",
        "Environment :: Console",
        "Intended Audience :: End Users/Desktop",
        "Intended Audience :: Science/Research",
        "Intended Audience :: System Administrators",
-        "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
+        "License :: OSI Approved :: Mozilla Public License 2.0 (MPL 2.0)",
        "Operating System :: MacOS :: MacOS X",
        "Operating System :: Microsoft :: Windows :: Windows 10",
        "Operating System :: POSIX",
@@ -72,7 +63,6 @@ setup(
    python_requires=' >= 3.6',
    setup_requires=[  # can be removed whenever we can drop pip 9 support
        'cffi >= 1.9.1',  # to build the leptonica module
-        'pytest-runner',  # to enable python setup.py test
        'setuptools_scm',  # so that version will work
        'setuptools_scm_git_archive',  # enable version from github tarballs
    ],
@@ -81,11 +71,12 @@ setup(
    install_requires=[
        'cffi >= 1.9.1',  # must be a setup and install requirement
        'coloredlogs >= 14.0',  # strictly optional
-        'img2pdf >= 0.3.0, < 0.4',  # pure Python, so track HEAD closely
-        'pdfminer.six >= 20191110, <= 20200517',
-        'pikepdf >= 1.14.0, < 2',
+        'img2pdf >= 0.3.0, < 0.5',  # pure Python, so track HEAD closely
+        'pdfminer.six >= 20191110, != 20200720, <= 20201018',
+        "pikepdf >= 1.14.0, < 3 ; python_version < '3.9'",
+        "pikepdf >= 2.0.0 ; python_version >= '3.9'",
        'Pillow >= 7.0.0',
-        'pluggy >= 0.13.0',
+        'pluggy >= 0.13.0, < 1.0',
        'reportlab >= 3.3.0',  # oldest released version with sane image handling
        'tqdm >= 4',
    ],
@@ -1,19 +1,8 @@
 # © 2017 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.


 from pluggy import HookimplMarker as _HookimplMarker
@@ -1,23 +1,14 @@
 #!/usr/bin/env python3
 # © 2015-19 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 import os
+import signal
 import sys
 from multiprocessing import set_start_method

@@ -26,11 +17,20 @@ from ocrmypdf._plugin_manager import get_parser_options_plugins
 from ocrmypdf._sync import run_pipeline
 from ocrmypdf._validation import check_closed_streams, check_options
 from ocrmypdf.api import Verbosity, configure_logging
-from ocrmypdf.exceptions import BadArgsError, ExitCode, MissingDependencyError
+from ocrmypdf.exceptions import (
+    BadArgsError,
+    ExitCode,
+    InputFileError,
+    MissingDependencyError,
+)

 log = logging.getLogger('ocrmypdf')


+def sigbus(*args):
+    raise InputFileError("Lost access to the input file")
+
+
 def run(args=None):
    _parser, options, plugin_manager = get_parser_options_plugins(args=args)

@@ -62,6 +62,9 @@ def run(args=None):
        log.error(e)
        return ExitCode.missing_dependency

+    if hasattr(signal, 'SIGBUS'):
+        signal.signal(signal.SIGBUS, sigbus)
+
    result = run_pipeline(options=options, plugin_manager=plugin_manager)
    return result

@@ -1,19 +1,9 @@
 # © 2020 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 import logging.handlers
@@ -28,6 +18,8 @@ from typing import Callable, Iterable, Optional

 from tqdm import tqdm

+from ocrmypdf.exceptions import InputFileError
+

 def log_listener(queue):
    """Listen to the worker processes and forward the messages to logging
@@ -53,15 +45,24 @@ def log_listener(queue):
            traceback.print_exc(file=sys.stderr)


-def process_init(queue, user_init):
+def process_sigbus(*args):
+    raise InputFileError("A worker process lost access to an input file")
+
+
+def process_init(queue, user_init, loglevel):
    """Initialize a process pool worker"""

    # Ignore SIGINT (our parent process will kill us gracefully)
    signal.signal(signal.SIGINT, signal.SIG_IGN)

+    # Install SIGBUS handler (so our parent process can abort somewhat gracefully)
+    if hasattr(signal, 'SIGBUS'):
+        signal.signal(signal.SIGBUS, process_sigbus)
+
    # Reconfigure the root logger for this process to send all messages to a queue
    h = logging.handlers.QueueHandler(queue)
    root = logging.getLogger()
+    root.setLevel(loglevel)
    root.handlers = []
    root.addHandler(h)

@@ -69,7 +70,10 @@ def process_init(queue, user_init):
        user_init()


-def thread_init(_queue, user_init):
+def thread_init(_queue, user_init, _loglevel):
+    # As a thread, block SIGBUS so the main thread deals with it...
+    if hasattr(signal, 'SIGBUS'):
+        signal.pthread_sigmask(signal.SIG_BLOCK, {signal.SIGBUS})
    if user_init:
        user_init()

@@ -84,7 +88,7 @@ def exec_progress_pool(
    task_arguments: Optional[Iterable] = None,
    task_finished: Optional[Callable] = None,
 ):
-    log_queue = multiprocessing.Queue(-1)
+    log_queue: multiprocessing.Queue = multiprocessing.Queue(-1)
    listener = threading.Thread(target=log_listener, args=(log_queue,))

    if use_threads:
@@ -99,7 +103,7 @@ def exec_progress_pool(
        pool = pool_class(
            processes=max_workers,
            initializer=initializer,
-            initargs=(log_queue, task_initializer),
+            initargs=(log_queue, task_initializer, logging.getLogger("").level),
        )
        try:
            results = pool.imap_unordered(task, task_arguments)
@@ -1,18 +1,8 @@
 # © 2020 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 """Manage third party executables"""
@@ -1,19 +1,9 @@
 # © 2017 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 """Interface to Ghostscript executable"""

@@ -25,6 +15,7 @@ from os import fspath
 from pathlib import Path
 from shutil import which
 from subprocess import PIPE, CalledProcessError
+from typing import Optional, cast

 from PIL import Image

@@ -34,12 +25,12 @@ from ocrmypdf.subprocess import get_version, run

 log = logging.getLogger(__name__)

-GS = 'gs'
+_gswin = None
 if os.name == 'nt':
-    GS = which('gswin64c')
-    if not GS:
-        GS = which('gswin32c')
-        if not GS:
+    _gswin = which('gswin64c')
+    if not _gswin:
+        _gswin = which('gswin32c')
+        if not _gswin:
            raise MissingDependencyError(
                """
                ---------------------------------------------------------------------
@@ -52,7 +43,10 @@ if os.name == 'nt':
                ---------------------------------------------------------------------
                """
            )
-    GS = Path(GS).stem
+    _gswin = Path(_gswin).stem
+
+GS = _gswin if _gswin else 'gs'
+del _gswin


 def version():
@@ -77,7 +71,7 @@ def jpeg_passthrough_available() -> bool:


 def _gs_error_reported(stream) -> bool:
-    return re.search(r'error', stream, flags=re.IGNORECASE)
+    return True if re.search(r'error', stream, flags=re.IGNORECASE) else False


 def rasterize_pdf(
@@ -87,8 +81,8 @@ def rasterize_pdf(
    raster_device: str,
    raster_dpi: Resolution,
    pageno: int = 1,
-    page_dpi: Resolution = None,
-    rotation: int = None,
+    page_dpi: Optional[Resolution] = None,
+    rotation: Optional[int] = None,
    filter_vector: bool = False,
 ):
    """Rasterize one page of a PDF at resolution raster_dpi in canvas units."""
@@ -128,8 +122,6 @@ def rasterize_pdf(
        stderr = p.stderr.decode(errors='replace')
        if _gs_error_reported(stderr):
            log.error(stderr)
-        elif stderr:
-            log.debug(stderr)

    with Image.open(BytesIO(p.stdout)) as im:
        if rotation is not None:
@@ -1,19 +1,9 @@
 # © 2018 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 """Interface to jbig2 executable"""

@@ -1,22 +1,17 @@
 # © 2018 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 """Interface to pngquant executable"""

+from contextlib import contextmanager
+from io import BytesIO
+from os import fspath
+from pathlib import Path
+from subprocess import PIPE
 from tempfile import NamedTemporaryFile

 from PIL import Image
@@ -37,32 +32,32 @@ def available():
    return True


-def quantize(input_file, output_file, quality_min, quality_max):
-    if input_file.endswith('.jpg'):
-        with Image.open(input_file) as im, NamedTemporaryFile(suffix='.png') as tmp:
-            im.save(tmp)
-            args = [
-                'pngquant',
-                '--force',
-                '--skip-if-larger',
-                '--output',
-                output_file,
-                '--quality',
-                f'{quality_min}-{quality_max}',
-                '--',
-                tmp.name,
-            ]
-            run(args)
+@contextmanager
+def input_as_png(input_file: Path):
+    if not input_file.name.endswith('.png'):
+        with Image.open(input_file) as im:
+            bio = BytesIO()
+            im.save(bio, format='png')
+            bio.seek(0)
+            yield bio
    else:
+        with open(input_file, 'rb') as f:
+            yield f
+
+
+def quantize(input_file: Path, output_file: Path, quality_min: int, quality_max: int):
+    with input_as_png(input_file) as input_stream:
        args = [
            'pngquant',
            '--force',
            '--skip-if-larger',
-            '--output',
-            output_file,
            '--quality',
            f'{quality_min}-{quality_max}',
-            '--',
-            input_file,
+            '--',  # pngquant: stop processing arguments
+            '-',  # pngquant: stream input and output
        ]
-        run(args)
+        result = run(args, stdin=input_stream, stdout=PIPE, stderr=PIPE, check=False)
+
+    if result.returncode == 0:
+        # input_file could be the same as output_file, so we defer the write
+        output_file.write_bytes(result.stdout)
@@ -1,19 +1,9 @@
 # © 2017 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 """Interface to Tesseract executable"""

@@ -123,7 +113,7 @@ def get_languages():
    return set(lang.strip() for lang in rest)


-def tess_base_args(langs: List[str], engine_mode) -> List[str]:
+def tess_base_args(langs: List[str], engine_mode: int) -> List[str]:
    args = ['tesseract']
    if langs:
        args.extend(['-l', '+'.join(langs)])
@@ -132,7 +122,7 @@ def tess_base_args(langs: List[str], engine_mode) -> List[str]:
    return args


-def get_orientation(input_file: Path, engine_mode, timeout: float):
+def get_orientation(input_file: Path, engine_mode: int, timeout: float):
    args_tesseract = tess_base_args(['osd'], engine_mode) + [
        '--psm',
        '0',
@@ -229,9 +219,9 @@ def generate_hocr(
    input_file: Path,
    output_hocr: Path,
    output_text: Path,
-    languages: list,
-    engine_mode,
-    tessconfig: list,
+    languages: List[str],
+    engine_mode: int,
+    tessconfig: List[str],
    timeout: float,
    pagesegmode: int,
    user_words,
@@ -290,7 +280,7 @@ def generate_pdf(
    output_pdf: Path,
    output_text: Path,
    languages: List[str],
-    engine_mode,
+    engine_mode: int,
    tessconfig: List[str],
    timeout: float,
    pagesegmode: int,
@@ -1,19 +1,9 @@
 # © 2015 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 # unpaper documentation:
 # https://github.com/Flameeyes/unpaper/blob/master/doc/basic-concepts.md
@@ -65,21 +55,21 @@ def _setup_unpaper_io(tmpdir: Path, input_file: Path) -> Tuple[Path, Path]:
                "Failed to convert image to a supported format."
            ) from e

-        if im_modified or input_file.suffix != '.png':
-            input_png = tmpdir / 'input.png'
-            im.save(input_png, format='PNG', compress_level=1)
+        if im_modified or input_file.suffix != '.pnm':
+            input_pnm = tmpdir / 'input.pnm'
+            im.save(input_pnm, format='PPM')
        else:
            # No changes, PNG input, just use the file we already have
-            input_png = input_file
+            input_pnm = input_file
        output_pnm = tmpdir / f'output{suffix}'
-    return input_png, output_pnm
+    return input_pnm, output_pnm


 def run(input_file, output_file, dpi, mode_args):
-    args_unpaper = ['unpaper', '-v', '--dpi', str(dpi)] + mode_args
+    args_unpaper = ['unpaper', '-v', '--dpi', str(round(dpi, 6))] + mode_args

    with TemporaryDirectory() as tmpdir:
-        input_png, output_pnm = _setup_unpaper_io(Path(tmpdir), input_file)
+        input_pnm, output_pnm = _setup_unpaper_io(Path(tmpdir), input_file)

        # To prevent any shenanigans from accepting arbitrary parameters in
        # --unpaper-args, we:
@@ -88,36 +78,31 @@ def run(input_file, output_file, dpi, mode_args):
        # 3) append absolute paths for the input and output file
        # This should ensure that a user cannot clobber some other file with
        # their unpaper arguments (whether intentionally or otherwise)
-        args_unpaper.extend([os.fspath(input_png), os.fspath(output_pnm)])
+        args_unpaper.extend([os.fspath(input_pnm), os.fspath(output_pnm)])
+        external_run(
+            args_unpaper,
+            close_fds=True,
+            check=True,
+            universal_newlines=True,
+            stderr=STDOUT,  # unpaper writes logging output to stdout and stderr
+            stdout=PIPE,  # and cannot send file output to stdout
+            cwd=tmpdir,
+            logs_errors_to_stdout=True,
+        )
        try:
-            proc = external_run(
-                args_unpaper,
-                check=True,
-                close_fds=True,
-                universal_newlines=True,
-                stderr=STDOUT,  # unpaper writes logging output to stdout and stderr
-                cwd=tmpdir,  # and cannot send file output to stdout
-                stdout=PIPE,
-            )
-        except CalledProcessError as e:
-            log.debug(e.stderr)
-            raise e from e
-        else:
-            log.debug(proc.stderr)
-            try:
-                with Image.open(output_pnm) as imout:
-                    imout.save(output_file, dpi=(dpi, dpi))
-            except (FileNotFoundError, OSError):
-                raise SubprocessOutputError(
-                    "unpaper: failed to produce the expected output file. "
-                    + " Called with: "
-                    + str(args_unpaper)
-                ) from None
+            with Image.open(output_pnm) as imout:
+                imout.save(output_file, dpi=(dpi, dpi))
+        except (FileNotFoundError, OSError):
+            raise SubprocessOutputError(
+                "unpaper: failed to produce the expected output file. "
+                + " Called with: "
+                + str(args_unpaper)
+            ) from None


 def validate_custom_args(args: str):
    unpaper_args = shlex.split(args)
-    if any('/' in arg for arg in unpaper_args):
+    if any(('/' in arg or arg == '.' or arg == '..') for arg in unpaper_args):
        raise ValueError('No filenames allowed in --unpaper-args')
    return unpaper_args

@@ -1,19 +1,9 @@
 # © 2018 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 from contextlib import suppress
@@ -135,34 +125,38 @@ class OcrGrafter:
                del self.pdf_base.pages[-1]
            emplaced_page = True

+        # Calculate if the text is misaligned compared to the content
        if emplaced_page:
            content_rotation = autorotate_correction
        text_rotation = autorotate_correction
        text_misaligned = (text_rotation - content_rotation) % 360
        log.debug(
-            f"Rotations for page {pageno}: [text, auto, misalign, content] = "
-            f"{text_rotation}, {autorotate_correction}, "
-            f"{text_misaligned}, {content_rotation}"
+            f"Text rotation: (text, autorotate, content) -> text misalignment = "
+            f"({text_rotation}, {autorotate_correction}, {content_rotation}) -> {text_misaligned}"
        )

        if textpdf and self.font:
-            # Graft the text layer onto this page, whether new or old
+            # Graft the text layer onto this page, whether new or old, possibly
+            # rotating the text layer by the amount is misaligned.
            strip_old = self.context.options.redo_ocr
            self._graft_text_layer(
                page_num=pageno + 1,
                textpdf=textpdf,
                font=self.font,
                font_key=self.font_key,
-                rotation=text_misaligned,
+                text_rotation=text_misaligned,
                procset=self.procset,
                strip_old_text=strip_old,
            )

-        # Correct the rotation if applicable
-        self.pdf_base.pages[pageno].Rotate = (
-            content_rotation - autorotate_correction
-        ) % 360
-
+        # Correct the overall page rotation if needed, now that the text and content
+        # are aligned
+        page_rotation = (content_rotation - autorotate_correction) % 360
+        self.pdf_base.pages[pageno].Rotate = page_rotation
+        log.debug(
+            f"Page rotation: (content, auto) -> page = "
+            f"({content_rotation}, {autorotate_correction}) -> {page_rotation}"
+        )
        if self.emplacements % MAX_REPLACE_PAGES == 0:
            self.save_and_reload()

@@ -236,7 +230,7 @@ class OcrGrafter:
        font: pikepdf.Object,
        font_key: pikepdf.Object,
        procset: pikepdf.Object,
-        rotation: int,
+        text_rotation: int,
        strip_old_text: bool,
    ):
        """Insert the text layer from text page 0 on to pdf_base at page_num"""
@@ -266,13 +260,13 @@ class OcrGrafter:
            corner = pikepdf.PdfMatrix().translated(mediabox[0], mediabox[1])
            # -rotation because the input is a clockwise angle and this formula
            # uses CCW
-            rotation = -rotation % 360
-            rotate = pikepdf.PdfMatrix().rotated(rotation)
+            text_rotation = -text_rotation % 360
+            rotate = pikepdf.PdfMatrix().rotated(text_rotation)

            # Because of rounding of DPI, we might get a text layer that is not
            # identically sized to the target page. Scale to adjust. Normally this
            # is within 0.998.
-            if rotation in (90, 270):
+            if text_rotation in (90, 270):
                wt, ht = ht, wt
            scale_x = wp / wt
            scale_y = hp / ht
@@ -1,19 +1,9 @@
 # © 2018 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import os
 import shutil
@@ -1,19 +1,9 @@
 # © 2020 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 import sys
@@ -1,19 +1,9 @@
 # © 2016 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 import os
@@ -342,8 +332,10 @@ def rasterize_preview(input_file: Path, page_context: PageContext):
        output_file=output_file,
        raster_device='jpeggray',
        raster_dpi=canvas_dpi,
-        page_dpi=page_dpi,
        pageno=page_context.pageinfo.pageno + 1,
+        page_dpi=page_dpi,
+        rotation=0,
+        filter_vector=False,
    )
    return output_file

@@ -443,7 +435,7 @@ def rasterize(

    device = colorspaces[device_idx]

-    log.debug(f"Rasterize with {device}")
+    log.debug(f"Rasterize with {device}, rotation {correction}")

    # Produce the page image with square resolution or else deskew and OCR
    # will not work properly.
@@ -530,7 +522,9 @@ def create_ocr_image(image: Path, page_context: PageContext):
        if options.threshold:
            pix = leptonica.Pix.frompil(im)
            pix = pix.masked_threshold_on_background_norm()
-            im = pix.topil()
+            im_pix = pix.topil()
+            im_pix.info['dpi'] = im.info['dpi']
+            im = im_pix

        del draw

@@ -761,7 +755,9 @@ def metadata_fixup(working_file: Path, context: PdfContext):
            # Reverse this, because PDF/A TechNote 0003:Metadata in PDF/A-1
            # and the XMP Spec do not make this recommendation.
            if meta.get('dc:title') == 'Untitled':
-                with original.open_metadata() as original_meta:
+                with original.open_metadata(
+                    set_pikepdf_as_editor=False, update_docinfo=False
+                ) as original_meta:
                    if 'dc:title' not in original_meta:
                        del meta['dc:title']

@@ -1,19 +1,9 @@
 # © 2020 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import argparse
 import importlib
@@ -21,7 +11,7 @@ import importlib.util
 import sys
 from functools import partial
 from pathlib import Path
-from typing import Callable, List, Tuple
+from typing import Callable, List, Tuple, Union

 import pluggy

@@ -64,18 +54,22 @@ class OcrmypdfPluginManager(pluggy.PluginManager):
        )


-def _setup_plugins(pm: pluggy.PluginManager, plugins: List[str], builtins: bool = True):
+def _setup_plugins(
+    pm: pluggy.PluginManager, plugins: List[Union[str, Path]], builtins: bool = True
+):
    pm.add_hookspecs(pluginspec)

+    all_plugins: List[Union[str, Path]] = []
    if builtins:
-        all_plugins = [
-            'ocrmypdf.builtin_plugins.ghostscript',
-            'ocrmypdf.builtin_plugins.tesseract_ocr',
-        ] + plugins
-    else:
-        all_plugins = plugins
+        all_plugins.extend(
+            [
+                'ocrmypdf.builtin_plugins.ghostscript',
+                'ocrmypdf.builtin_plugins.tesseract_ocr',
+            ]
+        )
+    all_plugins.extend(plugins)
    for name in all_plugins:
-        if name.endswith('.py'):
+        if isinstance(name, Path) or name.endswith('.py'):
            # Import by filename
            module_name = Path(name).stem
            spec = importlib.util.spec_from_file_location(module_name, name)
@@ -1,19 +1,9 @@
 # © 2016 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 import logging.handlers
@@ -25,11 +15,13 @@ from pathlib import Path
 from tempfile import mkdtemp
 from typing import List, NamedTuple, Optional, Tuple

+import pikepdf
 import PIL

 from ocrmypdf._concurrent import exec_progress_pool
 from ocrmypdf._graft import OcrGrafter
 from ocrmypdf._jobcontext import PageContext, PdfContext, cleanup_working_files
+from ocrmypdf._logging import PageNumberFilter
 from ocrmypdf._pipeline import (
    convert_to_pdfa,
    copy_final,
@@ -62,7 +54,12 @@ from ocrmypdf._validation import (
    report_output_file_size,
 )
 from ocrmypdf.exceptions import ExitCode, ExitCodeException
-from ocrmypdf.helpers import available_cpu_count, check_pdf, samefile
+from ocrmypdf.helpers import (
+    available_cpu_count,
+    check_pdf,
+    pikepdf_enable_mmap,
+    samefile,
+)
 from ocrmypdf.pdfa import file_claims_pdfa

 log = logging.getLogger(__name__)
@@ -212,9 +209,10 @@ def exec_page_sync(page_context: PageContext):
    if options.pdf_renderer == 'hocr':
        (hocr_out, text_out) = ocr_engine_hocr(ocr_image_out, page_context)
        ocr_out = render_hocr_page(hocr_out, page_context)
-
-    if options.pdf_renderer == 'sandwich':
+    elif options.pdf_renderer == 'sandwich':
        (ocr_out, text_out) = ocr_engine_textonly_pdf(ocr_image_out, page_context)
+    else:
+        raise NotImplementedError(f"pdf_renderer {options.pdf_renderer}")

    return PageResult(
        pageno=page_context.pageno,
@@ -240,13 +238,15 @@ def worker_init(max_pixels: int):
    # the parent process, so ensure workers get it set. Not needed when running
    # threaded, but harmless to set again.
    PIL.Image.MAX_IMAGE_PIXELS = max_pixels
+    pikepdf_enable_mmap()


 def exec_concurrent(context: PdfContext):
    """Execute the pipeline concurrently"""

    # Run exec_page_sync on every page context
-    max_workers = min(len(context.pdfinfo), context.options.jobs)
+    options = context.options
+    max_workers = min(len(context.pdfinfo), options.jobs)
    if max_workers > 1:
        log.info("Start processing %d pages concurrently", max_workers)

@@ -254,25 +254,29 @@ def exec_concurrent(context: PdfContext):
    ocrgraft = OcrGrafter(context)

    def update_page(result: PageResult, pbar):
-        sidecars[result.pageno] = result.text
-        pbar.update()
-        ocrgraft.graft_page(
-            pageno=result.pageno,
-            image=result.pdf_page_from_image,
-            textpdf=result.ocr,
-            autorotate_correction=result.orientation_correction,
-        )
-        pbar.update()
+        try:
+            tls.pageno = result.pageno + 1
+            sidecars[result.pageno] = result.text
+            pbar.update()
+            ocrgraft.graft_page(
+                pageno=result.pageno,
+                image=result.pdf_page_from_image,
+                textpdf=result.ocr,
+                autorotate_correction=result.orientation_correction,
+            )
+            pbar.update()
+        finally:
+            tls.pageno = None

    exec_progress_pool(
-        use_threads=context.options.use_threads,
+        use_threads=options.use_threads,
        max_workers=max_workers,
        tqdm_kwargs=dict(
            total=(2 * len(context.pdfinfo)),
-            desc='OCR',
+            desc='OCR' if options.tesseract_timeout > 0 else 'Image processing',
            unit='page',
            unit_scale=0.5,
-            disable=not context.options.progress_bar,
+            disable=not options.progress_bar,
        ),
        task_initializer=partial(worker_init, PIL.Image.MAX_IMAGE_PIXELS),
        task=exec_page_sync,
@@ -281,19 +285,20 @@ def exec_concurrent(context: PdfContext):
    )

    # Output sidecar text
-    if context.options.sidecar:
+    if options.sidecar:
        text = merge_sidecars(sidecars, context)
        # Copy text file to destination
-        copy_final(text, context.options.sidecar, context)
+        copy_final(text, options.sidecar, context)

    # Merge layers to one single pdf
    pdf = ocrgraft.finalize()

    # PDF/A and metadata
+    log.info("Postprocessing...")
    pdf = post_process(pdf, context)

    # Copy PDF file to destination
-    copy_final(pdf, context.options.output_file, context)
+    copy_final(pdf, options.output_file, context)


 class NeverRaise(Exception):
@@ -302,13 +307,21 @@ class NeverRaise(Exception):
    pass  # pylint: disable=unnecessary-pass


-def configure_debug_logging(log_filename, prefix=''):
+def configure_debug_logging(log_filename, prefix: str = ''):
+    """
+    Create a debug log file at a specified location.
+
+    Arguments:
+        log_filename: Where to the put the log file.
+        prefix: The logging domain prefix that should be sent to the log.
+    """
    log_file_handler = logging.FileHandler(log_filename, delay=True)
    log_file_handler.setLevel(logging.DEBUG)
    formatter = logging.Formatter(
        '[%(asctime)s] - %(name)s - %(levelname)7s -%(pageno)s %(message)s'
    )
    log_file_handler.setFormatter(formatter)
+    log_file_handler.addFilter(PageNumberFilter())
    logging.getLogger(prefix).addHandler(log_file_handler)
    return log_file_handler

@@ -324,11 +337,16 @@ def run_pipeline(options, *, plugin_manager, api=False):

    work_folder = Path(mkdtemp(prefix="com.github.ocrmypdf."))
    debug_log_handler = None
-    if (options.keep_temporary_files or options.verbose >= 1) and not os.environ.get(
-        'PYTEST_CURRENT_TEST', ''
+    if (
+        (options.keep_temporary_files or options.verbose >= 1)
+        and not os.environ.get('PYTEST_CURRENT_TEST', '')
+        and not api
    ):
+        # Debug log for command line interface only with verbose output
        debug_log_handler = configure_debug_logging(Path(work_folder) / "debug.log")

+    pikepdf_enable_mmap()
+
    try:
        check_requested_output_file(options)
        start_input_file, original_filename = create_input_file(options, work_folder)
@@ -1,20 +1,9 @@
 #!/usr/bin/env python3
 # © 2015-17 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.


 import locale
@@ -224,12 +213,12 @@ def check_options_optimizing(options):


 def check_options_advanced(options):
-    if options.pdfa_image_compression != 'auto' and options.output_type.startswith(
+    if options.pdfa_image_compression != 'auto' and not options.output_type.startswith(
        'pdfa'
    ):
        log.warning(
-            "--pdfa-image-compression argument has no effect when "
-            "--output-type is not 'pdfa', 'pdfa-1', or 'pdfa-2'"
+            "--pdfa-image-compression argument only applies when "
+            "--output-type is one of 'pdfa', 'pdfa-1', or 'pdfa-2'"
        )


@@ -319,17 +308,6 @@ def check_closed_streams(options):  # pragma: no cover
    return True


-def log_page_orientations(pdfinfo):
-    direction = {0: 'n', 90: 'e', 180: 's', 270: 'w'}
-    orientations = []
-    for n, page in enumerate(pdfinfo):
-        angle = page.rotation or 0
-        if angle != 0:
-            orientations.append('{0}{1}'.format(n + 1, direction.get(angle, '')))
-    if orientations:
-        log.info('Page orientations detected: %s', ' '.join(orientations))
-
-
 def create_input_file(options, work_folder: Path) -> Tuple[Path, str]:
    if options.input_file == '-':
        # stdin
@@ -416,6 +394,10 @@ def report_output_file_size(options, input_file, output_file):
                    f"The optional dependency '{name}' was not found, so some image "
                    f"optimizations could not be attempted."
                )
+    if options.output_type.startswith('pdfa'):
+        reasons.append("PDF/A conversion was enabled. (Try `--output-type pdf`.)")
+    if options.plugins:
+        reasons.append("Plugins were used.")

    if reasons:
        explanation = "Possible reasons for this include:\n" + '\n'.join(reasons) + "\n"
@@ -1,19 +1,8 @@
 # © 2017 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.


 import pkg_resources
@@ -1,33 +1,24 @@
 # © 2019 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 import os
 import sys
-from argparse import ArgumentParser
 from enum import IntEnum
 from pathlib import Path
-from typing import BinaryIO, Iterable, Union
+from typing import AnyStr, BinaryIO, Iterable, Optional, Union
+from warnings import warn

 from ocrmypdf._logging import PageNumberFilter, TqdmConsole
 from ocrmypdf._plugin_manager import get_plugin_manager
 from ocrmypdf._sync import run_pipeline
 from ocrmypdf._validation import check_options
-from ocrmypdf.cli import get_parser
+from ocrmypdf.cli import ArgumentParser, get_parser
+from ocrmypdf.helpers import is_iterable_notstr

 try:
    import coloredlogs
@@ -35,7 +26,8 @@ except ModuleNotFoundError:
    coloredlogs = None


-PathOrIO = Union[BinaryIO, os.PathLike, str, bytes]
+StrPath = Union[os.PathLike, AnyStr]
+PathOrIO = Union[BinaryIO, StrPath]


 class Verbosity(IntEnum):
@@ -54,16 +46,28 @@ def configure_logging(
 ):
    """Set up logging.

-    Library users may wish to use this function if they want their log output to be
-    similar to ocrmypdf command line interface. If not used, the external application
-    should configure logging on its own.
+    Before calling :func:`ocrmypdf.ocr()`, you can use this function to
+    configure logging, if you want ocrmypdf's output to look like the ocrmypdf
+    command line interface. It will register log handlers, log filters, and
+    formatters, configure color logging to standard error, and adjust the log
+    levels of third party libraries. Details of this are fine-tuned and subject
+    to change. The ``verbosity`` argument is equivalent to the argument
+    ``--verbose`` and applies those settings.

-    ocrmypdf will perform all of its logging under the ``"ocrmypdf"`` logging namespace.
-    In addition, ocrmypdf imports pdfminer, which logs under ``"pdfminer"``. A library
-    user may wish to configure both; note that pdfminer is extremely chatty at the log
-    level ``logging.INFO``.
+    If this function is not called, ocrmypdf will not configure logging, and it
+    is up to the caller of ``ocrmypdf.ocr()`` to set up logging as it wishes using
+    the Python standard library's logging module. If this function is called,
+    the caller may of course make further adjustments to logging.

-    Library users may perform additional configuration afterwards.
+    Regardless of whether this function is called, ocrmypdf will perform all of
+    its logging under the ``"ocrmypdf"`` logging namespace. In addition,
+    ocrmypdf imports pdfminer, which logs under ``"pdfminer"``. A library user
+    may wish to configure both; note that pdfminer is extremely chatty at the
+    log level ``logging.INFO``.
+
+    This function does not set up the ``debug.log`` log file that the command
+    line interface does at certain verbosity levels. Applications should configure
+    their own debug logging.

    Args:
        verbosity (Verbosity): Verbosity level.
@@ -153,7 +157,7 @@ def create_options(
                cmdline.append(f"--{cmd_style_arg}")
            continue

-        if isinstance(val, Iterable) and not isinstance(val, str):
+        if is_iterable_notstr(val):
            for elem in val:
                cmdline.append(f"--{cmd_style_arg}")
                cmdline.append(elem)
@@ -199,7 +203,7 @@ def ocr(  # pylint: disable=unused-argument
    language: Iterable[str] = None,
    image_dpi: int = None,
    output_type=None,
-    sidecar: os.PathLike = None,
+    sidecar: Optional[StrPath] = None,
    jobs: int = None,
    use_threads: bool = None,
    title: str = None,
@@ -236,7 +240,7 @@ def ocr(  # pylint: disable=unused-argument
    user_words: os.PathLike = None,
    user_patterns: os.PathLike = None,
    fast_web_view: float = None,
-    plugins: Iterable[str] = None,
+    plugins: Iterable[StrPath] = None,
    keep_temporary_files: bool = None,
    progress_bar: bool = None,
    **kwargs,
@@ -258,7 +262,7 @@ def ocr(  # pylint: disable=unused-argument
            read.
        output_file: If a :class:`pathlib.Path`, ``str`` or ``bytes``, this is
            interpreted as file system path to the output file. If the object
-            appears to be a writable stream (with methods such as ``.read()`` and
+            appears to be a writable stream (with methods such as ``.write()`` and
            ``.seek()``), the output will be written to this stream. If
            ``output_file`` is ``"-"``, the output will be written to ``sys.stdout``
            (provided that standard output does not seem to be a terminal device).
@@ -290,6 +294,8 @@ def ocr(  # pylint: disable=unused-argument
    """
    if not plugins:
        plugins = []
+    elif isinstance(plugins, (str, Path)):
+        plugins = [plugins]
    else:
        plugins = list(plugins)

@@ -302,6 +308,9 @@ def ocr(  # pylint: disable=unused-argument
    }
    create_options_kwargs.update(kwargs)

+    if 'verbose' in kwargs:
+        warn("ocrmypdf.ocr(verbose=) is ignored. Use ocrmypdf.configure_logging().")
+
    options = create_options(**create_options_kwargs)
    check_options(options, _plugin_manager)
    return run_pipeline(options=options, plugin_manager=_plugin_manager, api=True)
@@ -1,16 +1,5 @@
 # © 2020 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
@@ -1,19 +1,9 @@
 # © 2020 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging

@@ -49,13 +39,11 @@ def check_options(options):
    if gs_version < '9.20' and options.output_type != 'pdf' and not is_latin:
        # https://bugs.ghostscript.com/show_bug.cgi?id=696874
        # Ghostscript < 9.20 fails to encode multibyte characters properly
-        msg = (
-            "The installed version of Ghostscript does not work correctly "
-            "with the OCR languages you specified. Use --output-type pdf or "
+        log.warning(
+            f"The installed version of Ghostscript ({gs_version}) does not work "
+            "correctly with the OCR languages you specified. Use --output-type pdf or "
            "upgrade to Ghostscript 9.20 or later to avoid this issue."
        )
-        msg += f"Found Ghostscript {gs_version}"
-        log.warning(msg)

    if options.output_type == 'pdfa':
        options.output_type = 'pdfa-2'
@@ -73,9 +61,9 @@ def rasterize_pdf_page(
    raster_device,
    raster_dpi,
    pageno,
-    page_dpi=None,
-    rotation=None,
-    filter_vector=False,
+    page_dpi,
+    rotation,
+    filter_vector,
 ):
    ghostscript.rasterize_pdf(
        input_file,
@@ -1,19 +1,9 @@
 # © 2020 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 import os
@@ -131,9 +121,7 @@ def validate(pdfinfo, options):
        os.environ['OMP_THREAD_LIMIT'] = str(tess_threads)
    else:
        tess_threads = int(os.environ['OMP_THREAD_LIMIT'])
-
-    if tess_threads > 1:
-        log.info("Using Tesseract OpenMP thread limit %d", tess_threads)
+    log.debug("Using Tesseract OpenMP thread limit %d", tess_threads)


 class TesseractOcrEngine(OcrEngine):
@@ -1,19 +1,9 @@
 # © 2015-19 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import argparse

@@ -83,8 +73,8 @@ image, and then creates a PDF from the OCR information.
 """,
        epilog="""\
 OCRmyPDF attempts to keep the output file at about the same size.  If a file
-contains losslessly compressed images, and output file will be losslessly
-compressed as well.
+contains losslessly compressed images, and images in the output file will be
+losslessly compressed as well.

 PDF is a page description file that attempts to preserve a layout exactly.
 A PDF can contain vector objects (such as text or lines) and raster objects
@@ -103,9 +93,8 @@ all objects on the page and produce an image-only PDF as output.

 If you are concerned about long-term archiving of PDFs, use the default option
 --output-type pdfa which converts the PDF to a standardized PDF/A-2b.  This
-converts images to sRGB colorspace, removes some features from the PDF such
-as Javascript or forms. If you want to minimize the number of changes made to
-your PDF, use --output-type pdf.
+removes some features from the PDF such as Javascript or forms. If you want to
+minimize the number of changes made to your PDF, use --output-type pdf.

 If OCRmyPDF is given an image file as input, it will attempt to convert the
 image to a PDF before processing.  For more control over the conversion of
@@ -113,8 +102,7 @@ images to PDF, use the Python package img2pdf or other image to PDF software.

 For example, this command uses img2pdf to convert all .png files beginning
 with the 'page' prefix to a PDF, fitting each image on A4-sized paper, and
-sending the result to OCRmyPDF through a pipe.  img2pdf is a dependency of
-ocrmypdf so it is already installed.
+sending the result to OCRmyPDF through a pipe.

    img2pdf --pagesize A4 page*.png | ocrmypdf - myfile.pdf

@@ -462,7 +450,12 @@ Online documentation is located at:
        dest='plugins',
        action='append',
        default=[],
-        help="Name of plugin to import.",
+        help="Name of plugin to import. Argument may be issued multiple times to "
+        "import multiple plugins. Plugins may be specified as module names in "
+        "Python syntax, provided they are installed in the same Python (virtual) "
+        "environment as ocrmypdf; or you may give the path to the Python file that "
+        "contains the plugin. Plugins must conform to the specification in the "
+        "OCRmyPDF documentation.",
    )

    debugging = parser.add_argument_group(
@@ -1,19 +1,8 @@
 # © 2016 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.


 from enum import IntEnum
@@ -1,19 +1,9 @@
 # © 2016 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 import multiprocessing
@@ -35,6 +25,8 @@ log = logging.getLogger(__name__)


 class Resolution(namedtuple('Resolution', ('x', 'y'))):
+    """The number of pixels per inch in each 2D direction."""
+
    __slots__ = ()

    def round(self, ndigits: int):
@@ -113,6 +105,7 @@ def samefile(f1: os.PathLike, f2: os.PathLike):


 def is_iterable_notstr(thing: Any) -> bool:
+    """Is this is an iterable type, other than a string?"""
    return isinstance(thing, Iterable) and not isinstance(thing, str)


@@ -127,6 +120,7 @@ def page_number(input_file: os.PathLike) -> int:


 def available_cpu_count() -> int:
+    """Returns number of CPUs in the system."""
    try:
        return multiprocessing.cpu_count()
    except NotImplementedError:
@@ -173,6 +167,10 @@ def is_file_writable(test_file: os.PathLike) -> bool:


 def check_pdf(input_file: Path) -> bool:
+    """Check if a PDF complies with the PDF specification.
+
+    Checks for proper formatting and proper linearization.
+    """
    pdf = None
    try:
        pdf = pikepdf.open(input_file)
@@ -210,9 +208,22 @@ T = TypeVar('T')


 def clamp(n: T, smallest: T, largest: T) -> T:
+    """Clamps the value of n to between smallest and largest."""
    return max(smallest, min(n, largest))


+def pikepdf_enable_mmap():
+    # try:
+    #     if pikepdf._qpdf.set_access_default_mmap(True):
+    #         log.debug("pikepdf mmap enabled")
+    # except AttributeError:
+    #     log.debug("pikepdf mmap not available")
+    # We found a race condition probably related to pybind issue #2252 that can
+    # cause a crash. For now, disable pikepdf mmap to be on the safe side.
+    log.debug("pikepdf mmap disabled")
+    return
+
+
 def deprecated(func):
    """Warn that function is deprecated"""

@@ -35,7 +35,7 @@ from collections import namedtuple
 from itertools import chain
 from math import atan, cos, sin
 from pathlib import Path
-from typing import Union
+from typing import Optional, Tuple, Union
 from xml.etree import ElementTree

 from reportlab.lib.colors import black, cyan, magenta, red
@@ -133,7 +133,7 @@ class HocrTransform:
        return out

    @classmethod
-    def baseline(cls, element):
+    def baseline(cls, element) -> Tuple[float, float]:
        """
        Returns a tuple containing the baseline slope and intercept.
        """
@@ -143,7 +143,7 @@ class HocrTransform:
                return float(matches.group(1)), int(matches.group(2))
        return (0.0, 0.0)

-    def pt_from_pixel(self, pxl):
+    def pt_from_pixel(self, pxl) -> Rect:
        """
        Returns the quantity in PDF units (pt) given quantity in pixels
        """
@@ -156,28 +156,31 @@ class HocrTransform:
        return xpath

    @classmethod
-    def replace_unsupported_chars(cls, s: str):
+    def replace_unsupported_chars(cls, s: str) -> str:
        """
        Given an input string, returns the corresponding string that:
-        - is available in the helvetica facetype
-        - does not contain any ligature (to allow easy search in the PDF file)
+        * is available in the Helvetica facetype
+        * does not contain any ligature (to allow easy search in the PDF file)
        """
        return s.translate(cls.ligatures)

    def topdown_position(self, element):
        pxl_line_coords = self.element_coordinates(element)
        line_box = self.pt_from_pixel(pxl_line_coords)
-        return -line_box.y2
+        # Coordinates here are still in the hocr coordinate system, so 0 on the y axis
+        # is the top of the page and increasing values of y will move towards the
+        # bottom of the page.
+        return line_box.y2

    def to_pdf(
        self,
        out_filename: Path,
-        image_filename: Path = None,
+        image_filename: Optional[Path] = None,
        show_bounding_boxes: bool = False,
        fontname: str = "Helvetica",
        invisible_text: bool = False,
        interword_spaces: bool = False,
-    ):
+    ) -> None:
        """
        Creates a PDF file with an image superimposed on top of the text.
        Text is positioned according to the bounding box of the lines in
@@ -185,6 +188,20 @@ class HocrTransform:
        The image need not be identical to the image used to create the hOCR
        file.
        It can have a lower resolution, different color mode, etc.
+
+        Arguments:
+            out_filename: Path of PDF to write.
+            image_filename: Image to use for this file. If omitted, the OCR text
+                is shown.
+            show_bounding_boxes: Show bounding boxes around various text regions,
+                for debugging.
+            fontname: Name of font to use.
+            invisible_text: If True, text is rendered invisible so that is
+                selectable but never drawn. If False, text is visible and may
+                be seen if the image is skipped or deleted in Acrobat.
+            interword_spaces: If True, insert spaces between words rather than
+                drawing each word without spaces. Generally this improves text
+                extraction.
        """
        # create the PDF file
        # page size in points (1/72 in.)
@@ -3,20 +3,10 @@
 #
 # © 2013-16: jbarlow83 from Github (https://github.com/jbarlow83)
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
 #
 # Python FFI wrapper for Leptonica library

@@ -24,7 +14,9 @@ import argparse
 import logging
 import os
 import sys
+import threading
 import warnings
+from collections import deque
 from collections.abc import Sequence
 from contextlib import suppress
 from ctypes.util import find_library
@@ -66,6 +58,24 @@ if not _libpath:
        ---------------------------------------------------------------------
        """
    )
+if os.name == 'nt':  
+    # On Windows, recent versions of libpng require zlib. We have to make sure 
+    # the zlib version being loaded is the same one that libpng was built with. 
+    # This tries to import zlib from Tesseract's installation folder, falling back
+    # to find_library() if liblept is being loaded from somewhere else.
+    # Loading zlib from other places could cause a version mismatch
+    _zlib_path = os.path.join(os.path.dirname(_libpath), 'zlib1.dll')
+    if not os.path.exists(_zlib_path):
+        _zlib_path = find_library('zlib')
+    try:
+        zlib = ffi.dlopen(_zlib_path)
+    except ffi.error as e:
+        raise MissingDependencyError(
+            """
+            Could not load the zlib library. It could be that Tesseract is not installed properly,
+            we can't find the installation on your system PATH environment variable.
+            """
+        ) from e
 try:
    lept = ffi.dlopen(_libpath)
    lept.setMsgSeverity(lept.L_SEVERITY_WARNING)
@@ -75,7 +85,7 @@ except ffi.error as e:
    ) from e


-class _LeptonicaErrorTrap:
+class _LeptonicaErrorTrap_Redirect:
    """
    Context manager to trap errors reported by Leptonica.

@@ -90,19 +100,21 @@ class _LeptonicaErrorTrap:

    """

+    leptonica_lock = threading.Lock()
+
    def __init__(self):
        self.tmpfile = None
        self.copy_of_stderr = -1
        self.no_stderr = False

    def __enter__(self):
-
        self.tmpfile = TemporaryFile()

        # Save the old stderr, and redirect stderr to temporary file
-        with suppress(AttributeError):
-            sys.stderr.flush()
+        self.leptonica_lock.acquire()
        try:
+            with suppress(AttributeError):
+                sys.stderr.flush()
            self.copy_of_stderr = os.dup(sys.stderr.fileno())
            os.dup2(self.tmpfile.fileno(), sys.stderr.fileno(), inheritable=False)
        except AttributeError:
@@ -114,7 +126,10 @@ class _LeptonicaErrorTrap:
            os.dup2(self.tmpfile.fileno(), 2, inheritable=False)
        except UnsupportedOperation:
            self.copy_of_stderr = None
-        return
+        except Exception:
+            self.leptonica_lock.release()
+            raise
+        return self

    def __exit__(self, exc_type, exc_value, traceback):
        # Restore old stderr
@@ -131,6 +146,8 @@ class _LeptonicaErrorTrap:
        self.tmpfile.seek(0)  # Cursor will be at end, so move back to beginning
        leptonica_output = self.tmpfile.read().decode(errors='replace')
        self.tmpfile.close()
+        self.leptonica_lock.release()
+
        # If there are Python errors, record them
        if exc_type:
            logger.warning(leptonica_output)
@@ -148,6 +165,62 @@ class _LeptonicaErrorTrap:
        return False


+tls = threading.local()
+tls.trap = None
+
+
+@ffi.callback("void(char *)")
+def _stderr_handler(cstr):
+    msg = ffi.string(cstr).decode(errors='replace')
+    if msg.startswith("Error"):
+        logger.error(msg)
+    elif msg.startswith("Warning"):
+        logger.warning(msg)
+    else:
+        logger.debug(msg)
+    if tls.trap is not None:
+        tls.trap.append(msg)
+    return
+
+
+class _LeptonicaErrorTrap_Queue:
+    def __init__(self):
+        self.queue = deque()
+
+    def __enter__(self):
+        self.queue.clear()
+        tls.trap = self.queue
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        tls.trap = None
+        output = ''.join(self.queue)
+        self.queue.clear()
+
+        # If there are Python errors, record them
+        if exc_type:
+            logger.warning(output)
+
+        if 'Error' in output:
+            if 'image file not found' in output:
+                raise FileNotFoundError()
+            if 'pixWrite: stream not opened' in output:
+                raise LeptonicaIOError()
+            if 'index not valid' in output:
+                raise IndexError()
+            raise LeptonicaError(output)
+        return False
+
+
+try:
+    lept.leptSetStderrHandler(_stderr_handler)
+except ffi.error:
+    # Pre-1.79 Leptonica does not have leptSetStderrHandler
+    _LeptonicaErrorTrap = _LeptonicaErrorTrap_Redirect
+else:
+    # 1.79 have this new symbol
+    _LeptonicaErrorTrap = _LeptonicaErrorTrap_Queue
+
+
 class LeptonicaError(Exception):
    pass

@@ -856,6 +929,8 @@ def get_leptonica_version():
    Caveat: Leptonica expects the caller to free this memory.  We don't,
    since that would involve binding to libc to access libc.free(),
    a pointless effort to reclaim 100 bytes of memory.
+
+    Reminder that this returns "leptonica-1.xx" or "leptonica-1.yy.0".
    """
    return ffi.string(lept.getLeptonicaVersion()).decode()

@@ -1,18 +1,8 @@
 # © 2017 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 """Bindings to external libraries"""
@@ -1,20 +1,10 @@
 #!/usr/bin/env python3
 # © 2017 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 from pathlib import Path

@@ -509,6 +499,8 @@ void selDestroy ( SEL **psel );
 l_int32
 setMsgSeverity(l_int32 newsev);

+void
+leptSetStderrHandler(void (*handler)(const char *));
 """
 )

@@ -1,30 +1,36 @@
 # © 2018 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 import sys
 import tempfile
 from collections import defaultdict
 from functools import partial
+from io import BytesIO
 from os import fspath
 from pathlib import Path
+from typing import (
+    Any,
+    Callable,
+    Dict,
+    Iterator,
+    List,
+    MutableSet,
+    NamedTuple,
+    NewType,
+    Optional,
+    Sequence,
+    Tuple,
+    Union,
+)

+import img2pdf
 import pikepdf
-from pikepdf import Dictionary, Name
+from pikepdf import Dictionary, Name, Object, Pdf, PdfImage
 from PIL import Image
 from tqdm import tqdm

@@ -33,7 +39,7 @@ from ocrmypdf._concurrent import exec_progress_pool
 from ocrmypdf._exec import jbig2enc, pngquant
 from ocrmypdf._jobcontext import PdfContext
 from ocrmypdf.exceptions import OutputFileAccessError
-from ocrmypdf.helpers import safe_symlink
+from ocrmypdf.helpers import deprecated, safe_symlink

 log = logging.getLogger(__name__)

@@ -41,49 +47,64 @@ DEFAULT_JPEG_QUALITY = 75
 DEFAULT_PNG_QUALITY = 70


-def img_name(root, xref, ext):
-    return fspath(root / f'{xref:08d}{ext}')
+Xref = NewType('Xref', int)


-def png_name(root, xref):
+class XrefExt(NamedTuple):
+    xref: Xref
+    ext: str
+
+
+def img_name(root: Path, xref: Xref, ext: str) -> Path:
+    return root / f'{xref:08d}{ext}'
+
+
+def png_name(root: Path, xref: Xref) -> Path:
    return img_name(root, xref, '.png')


-def jpg_name(root, xref):
+def jpg_name(root: Path, xref: Xref) -> Path:
    return img_name(root, xref, '.jpg')


-def tif_name(root, xref):
+def tif_name(root: Path, xref: Xref) -> Path:
    return img_name(root, xref, '.tif')


-def extract_image_filter(pike, root, image, xref):
+def extract_image_filter(
+    pike: Pdf, root: Path, image: Object, xref: Xref
+) -> Optional[Tuple[PdfImage, Tuple[Name, Object]]]:
    if image.Subtype != Name.Image:
        return None
    if image.Length < 100:
-        log.debug("Skipping small image, xref %s", xref)
+        log.debug(f"Skipping small image, xref {xref}")
        return None

-    pim = pikepdf.PdfImage(image)
+    pim = PdfImage(image)

    if len(pim.filter_decodeparms) > 1:
-        log.debug("Skipping multiply filtered, xref %s", xref)
+        log.debug(f"Skipping multiply filtered image, xref {xref}")
        return None
    filtdp = pim.filter_decodeparms[0]

    if pim.bits_per_component > 8:
+        log.debug(f"Skipping wide gamut image, xref {xref}")
        return None  # Don't mess with wide gamut images

    if filtdp[0] == Name.JPXDecode:
+        log.debug(f"Skipping JPEG2000 iamge, xref {xref}")
        return None  # Don't do JPEG2000

    if Name.Decode in image:
+        log.debug(f"Skipping image with Decode table, xref {xref}")
        return None  # Don't mess with custom Decode tables

    return pim, filtdp


-def extract_image_jbig2(*, pike, root, image, xref, options):
+def extract_image_jbig2(
+    *, pike: pikepdf.Pdf, root: Path, image: Object, xref: Xref, options
+) -> Optional[XrefExt]:
    result = extract_image_filter(pike, root, image, xref)
    if result is None:
        return None
@@ -91,21 +112,38 @@ def extract_image_jbig2(*, pike, root, image, xref, options):

    if (
        pim.bits_per_component == 1
-        and filtdp != Name.JBIG2Decode
+        and filtdp[0] != Name.JBIG2Decode
        and jbig2enc.available()
    ):
-        try:
-            imgname = Path(root / f'{xref:08d}')
-            with imgname.open('wb') as f:
-                ext = pim.extract_to(stream=f)
-            imgname.rename(imgname.with_suffix(ext))
-        except pikepdf.UnsupportedImageTypeError:
-            return None
-        return xref, ext
+        # Save any colorspace associated with the image, so that we
+        # will export a pure 1-bit PNG with no palette or ICC profile.
+        # Showing the palette or ICC to jbig2enc will cause it to perform
+        # colorspace transform to 1bpp, which will conflict the palette or
+        # ICC if it exists.
+        colorspace = pim.obj.get(pikepdf.Name.ColorSpace, None)
+        if colorspace is not None or pim.image_mask:
+            try:
+                # Set to DeviceGray temporarily; we already in 1 bpc.
+                pim.obj.ColorSpace = pikepdf.Name.DeviceGray
+                imgname = root / f'{xref:08d}'
+                with imgname.open('wb') as f:
+                    ext = pim.extract_to(stream=f)
+                imgname.rename(imgname.with_suffix(ext))
+            except pikepdf.UnsupportedImageTypeError:
+                return None
+            finally:
+                # Restore image colorspace after temporarily setting it to DeviceGray
+                if colorspace is not None:
+                    pim.obj.ColorSpace = colorspace
+                else:
+                    del pim.obj.ColorSpace
+            return XrefExt(xref, ext)
    return None


-def extract_image_generic(*, pike, root, image, xref, options):
+def extract_image_generic(
+    *, pike: Pdf, root: Path, image: PdfImage, xref: Xref, options
+) -> Optional[XrefExt]:
    result = extract_image_filter(pike, root, image, xref)
    if result is None:
        return None
@@ -138,13 +176,13 @@ def extract_image_generic(*, pike, root, image, xref, options):
        #     with Image.open(stream) as im:
        #         im.save(jpg_name(root, xref), icc_profile=iccbytes)
        try:
-            imgname = Path(root / f'{xref:08d}')
+            imgname = root / f'{xref:08d}'
            with imgname.open('wb') as f:
                ext = pim.extract_to(stream=f)
            imgname.rename(imgname.with_suffix(ext))
        except pikepdf.UnsupportedImageTypeError:
            return None
-        return xref, ext
+        return XrefExt(xref, ext)
    elif (
        pim.indexed
        and pim.colorspace in pim.SIMPLE_COLORSPACES
@@ -153,12 +191,12 @@ def extract_image_generic(*, pike, root, image, xref, options):
        # Try to improve on indexed images - these are far from low hanging
        # fruit in most cases
        pim.as_pil_image().save(png_name(root, xref))
-        return xref, '.png'
+        return XrefExt(xref, '.png')
    elif not pim.indexed and pim.colorspace in pim.SIMPLE_COLORSPACES:
        # An optimization opportunity here, not currently taken, is directly
        # generating a PNG from compressed data
        pim.as_pil_image().save(png_name(root, xref))
-        return xref, '.png'
+        return XrefExt(xref, '.png')
    elif (
        not pim.indexed
        and pim.colorspace == Name.ICCBased
@@ -169,12 +207,14 @@ def extract_image_generic(*, pike, root, image, xref, options):
        # paying any attention to the ICC profile, provided we're not doing
        # lossy JBIG2
        pim.as_pil_image().save(png_name(root, xref))
-        return xref, '.png'
+        return XrefExt(xref, '.png')

    return None


-def extract_images(pike, root, options, extract_fn):
+def extract_images(
+    pike: Pdf, root: Path, options, extract_fn: Callable[..., Optional[XrefExt]],
+) -> Iterator[Tuple[int, XrefExt]]:
    """Extract image using extract_fn

    Enumerate images on each page, lookup their xref/ID number in the PDF.
@@ -190,8 +230,8 @@ def extract_images(pike, root, options, extract_fn):
    extension. extract_fn must also extract the file it finds interesting.
    """

-    include_xrefs = set()
-    exclude_xrefs = set()
+    include_xrefs: MutableSet[Xref] = set()
+    exclude_xrefs: MutableSet[Xref] = set()
    pageno_for_xref = {}
    errors = 0
    for pageno, page in enumerate(pike.pages):
@@ -202,12 +242,14 @@ def extract_images(pike, root, options, extract_fn):
        for _imname, image in dict(xobjs).items():
            if image.objgen[1] != 0:
                continue  # Ignore images in an incremental PDF
-            xref = image.objgen[0]
+            xref = Xref(image.objgen[0])
            if hasattr(image, 'SMask'):
                # Ignore soft masks
-                smask_xref = image.SMask.objgen[0]
+                smask_xref = Xref(image.SMask.objgen[0])
                exclude_xrefs.add(smask_xref)
+                log.debug(f"Skipping image {smask_xref} because it is an SMask")
            include_xrefs.add(xref)
+            log.debug(f"Treating {xref} as an optimization candidate")
            if xref not in pageno_for_xref:
                pageno_for_xref[xref] = pageno

@@ -224,31 +266,33 @@ def extract_images(pike, root, options, extract_fn):
        else:
            if result:
                _, ext = result
-                yield pageno_for_xref[xref], xref, ext
+                yield pageno_for_xref[xref], XrefExt(xref, ext)


-def extract_images_generic(pike, root, options):
+def extract_images_generic(
+    pike: Pdf, root: Path, options
+) -> Tuple[List[Xref], List[Xref]]:
    """Extract any >=2bpp image we think we can improve"""

    jpegs = []
    pngs = []
-    for _, xref, ext in extract_images(pike, root, options, extract_image_generic):
-        log.debug('xref = %s ext = %s', xref, ext)
-        if ext == '.png':
-            pngs.append(xref)
-        elif ext == '.jpg':
-            jpegs.append(xref)
+    for _, xref_ext in extract_images(pike, root, options, extract_image_generic):
+        log.debug('%s', xref_ext)
+        if xref_ext.ext == '.png':
+            pngs.append(xref_ext.xref)
+        elif xref_ext.ext == '.jpg':
+            jpegs.append(xref_ext.xref)
    log.debug("Optimizable images: JPEGs: %s PNGs: %s", len(jpegs), len(pngs))
    return jpegs, pngs


-def extract_images_jbig2(pike, root, options):
+def extract_images_jbig2(pike: Pdf, root: Path, options) -> Dict[int, List[XrefExt]]:
    """Extract any bitonal image that we think we can improve as JBIG2"""

    jbig2_groups = defaultdict(list)
-    for pageno, xref, ext in extract_images(pike, root, options, extract_image_jbig2):
+    for pageno, xref_ext in extract_images(pike, root, options, extract_image_jbig2):
        group = pageno // options.jbig2_page_group_size
-        jbig2_groups[group].append((xref, ext))
+        jbig2_groups[group].append(xref_ext)

    # Elide empty groups
    jbig2_groups = {
@@ -258,10 +302,12 @@ def extract_images_jbig2(pike, root, options):
    return jbig2_groups


-def _produce_jbig2_images(jbig2_groups, root, options):
+def _produce_jbig2_images(
+    jbig2_groups: Dict[int, List[XrefExt]], root: Path, options
+) -> None:
    """Produce JBIG2 images from their groups"""

-    def jbig2_group_args(root, groups):
+    def jbig2_group_args(root: Path, groups: Dict[int, List[XrefExt]]):
        for group, xref_exts in groups.items():
            prefix = f'group{group:08d}'
            yield dict(
@@ -270,7 +316,7 @@ def _produce_jbig2_images(jbig2_groups, root, options):
                out_prefix=prefix,
            )

-    def jbig2_single_args(root, groups):
+    def jbig2_single_args(root, groups: Dict[int, List[XrefExt]]):
        for group, xref_exts in groups.items():
            prefix = f'group{group:08d}'
            # Second loop is to ensure multiple images per page are unpacked
@@ -306,7 +352,9 @@ def _produce_jbig2_images(jbig2_groups, root, options):
    )


-def convert_to_jbig2(pike, jbig2_groups, root, options):
+def convert_to_jbig2(
+    pike: Pdf, jbig2_groups: Dict[int, List[XrefExt]], root: Path, options
+) -> None:
    """Convert images to JBIG2 and insert into PDF.

    When the JBIG2 page group size is > 1 we do several JBIG2 images at once
@@ -344,19 +392,19 @@ def convert_to_jbig2(pike, jbig2_groups, root, options):
            )


-def transcode_jpegs(pike, jpegs, root, options):
+def transcode_jpegs(pike: Pdf, jpegs: Sequence[Xref], root: Path, options) -> None:
    for xref in tqdm(
        jpegs, desc="JPEGs", unit='image', disable=not options.progress_bar
    ):
-        in_jpg = Path(jpg_name(root, xref))
+        in_jpg = jpg_name(root, xref)
        opt_jpg = in_jpg.with_suffix('.opt.jpg')

        # This produces a debug warning from PIL
        # DEBUG:PIL.Image:Error closing: 'NoneType' object has no attribute
        # 'close'.  Seems to be mostly harmless
        # https://github.com/python-pillow/Pillow/issues/1144
-        with Image.open(fspath(in_jpg)) as im:
-            im.save(fspath(opt_jpg), optimize=True, quality=options.jpeg_quality)
+        with Image.open(in_jpg) as im:
+            im.save(opt_jpg, optimize=True, quality=options.jpeg_quality)

        if opt_jpg.stat().st_size > in_jpg.stat().st_size:
            log.debug("xref %s, jpeg, made larger - skip", xref)
@@ -367,8 +415,55 @@ def transcode_jpegs(pike, jpegs, root, options):
        im_obj.write(compdata.read(), filter=Name.DCTDecode)


-def transcode_pngs(pike, images, image_name_fn, root, options):
-    modified = set()
+def _transcode_png(pike: Pdf, filename: Path, xref: Xref) -> bool:
+    output = filename.with_suffix('.png.pdf')
+    with output.open('wb') as f:
+        img2pdf.convert(fspath(filename), outputstream=f)
+
+    with pikepdf.open(output) as pdf_image:
+        foreign_image = next(pdf_image.pages[0].images.values())
+        local_image = pike.copy_foreign(foreign_image)
+
+        im_obj = pike.get_object(xref, 0)
+        im_obj.write(
+            local_image.read_raw_bytes(),
+            filter=local_image.Filter,
+            decode_parms=local_image.DecodeParms,
+        )
+
+        # Don't copy keys from the new image...
+        del_keys = set(im_obj.keys()) - set(local_image.keys())
+        # ...except for the keep_fields, which are essential to displaying
+        # the image correctly and preserving its metadata. (/Decode arrays
+        # and /SMaskInData are implicitly discarded prior to this point.)
+        keep_fields = {
+            '/ID',
+            '/Intent',
+            '/Interpolate',
+            '/Mask',
+            '/Metadata',
+            '/OC',
+            '/OPI',
+            '/SMask',
+            '/StructParent',
+        }
+        del_keys -= keep_fields
+        for key in local_image.keys():
+            if key != Name.Length and str(key) not in keep_fields:
+                im_obj[key] = local_image[key]
+        for key in del_keys:
+            del im_obj[key]
+    return True
+
+
+def transcode_pngs(
+    pike: Pdf,
+    images: Sequence[Xref],
+    image_name_fn: Callable[[Path, Xref], Path],
+    root: Path,
+    options,
+) -> None:
+    modified: MutableSet[Xref] = set()
    if options.optimize >= 2:
        png_quality = (
            max(10, options.png_quality - 10),
@@ -403,35 +498,12 @@ def transcode_pngs(pike, images, image_name_fn, root, options):
        )

    for xref in modified:
-        im_obj = pike.get_object(xref, 0)
-        try:
-            pix = leptonica.Pix.open(png_name(root, xref))
-            if pix.mode == '1':
-                compdata = pix.generate_pdf_ci_data(leptonica.lept.L_G4_ENCODE, 0)
-            else:
-                compdata = leptonica.CompressedData.open(png_name(root, xref))
-        except leptonica.LeptonicaError as e:
-            # Most likely this means file not found, i.e. quantize did not
-            # produce an improved version
-            log.error(e)
-            continue
-
-        # If re-coded image is larger don't use it - we test here because
-        # pngquant knows the size of the temporary output file but not the actual
-        # object in the PDF
-        if len(compdata) > int(im_obj.stream_dict.Length):
-            log.debug(
-                f"pngquant: pngquant did not improve over original image "
-                f"{len(compdata)} > {int(im_obj.stream_dict.Length)}"
-            )
-            continue
-        if compdata.type == leptonica.lept.L_FLATE_ENCODE:
-            rewrite_png(pike, im_obj, compdata)
-        elif compdata.type == leptonica.lept.L_G4_ENCODE:
-            rewrite_png_as_g4(pike, im_obj, compdata)
+        filename = png_name(root, xref)
+        _transcode_png(pike, filename, xref)


-def rewrite_png_as_g4(pike, im_obj, compdata):
+@deprecated
+def rewrite_png_as_g4(pike: Pdf, im_obj: Object, compdata) -> None:
    im_obj.BitsPerComponent = 1
    im_obj.Width = compdata.w
    im_obj.Height = compdata.h
@@ -451,7 +523,8 @@ def rewrite_png_as_g4(pike, im_obj, compdata):
    return


-def rewrite_png(pike, im_obj, compdata):
+@deprecated
+def rewrite_png(pike: Pdf, im_obj: Object, compdata) -> None:
    # When a PNG is inserted into a PDF, we more or less copy the IDAT section from
    # the PDF and transfer the rest of the PNG headers to PDF image metadata.
    # One thing we have to do is tell the PDF reader whether a predictor was used
@@ -504,7 +577,7 @@ def rewrite_png(pike, im_obj, compdata):
    im_obj.write(compdata.read(), filter=Name.FlateDecode, decode_parms=dparms)


-def optimize(input_file, output_file, context, save_settings):
+def optimize(input_file: Path, output_file: Path, context, save_settings) -> None:
    options = context.options
    if options.optimize == 0:
        safe_symlink(input_file, output_file)
@@ -518,7 +591,7 @@ def optimize(input_file, output_file, context, save_settings):
        options.jbig2_page_group_size = 10 if options.jbig2_lossy else 1

    with pikepdf.Pdf.open(input_file) as pike:
-        root = Path(output_file).parent / 'images'
+        root = output_file.parent / 'images'
        root.mkdir(exist_ok=True)

        jpegs, pngs = extract_images_generic(pike, root, options)
@@ -531,12 +604,12 @@ def optimize(input_file, output_file, context, save_settings):
        jbig2_groups = extract_images_jbig2(pike, root, options)
        convert_to_jbig2(pike, jbig2_groups, root, options)

-        target_file = Path(output_file).with_suffix('.opt.pdf')
+        target_file = output_file.with_suffix('.opt.pdf')
        pike.remove_unreferenced_resources()
        pike.save(target_file, **save_settings)

-    input_size = Path(input_file).stat().st_size
-    output_size = Path(target_file).stat().st_size
+    input_size = input_file.stat().st_size
+    output_size = target_file.stat().st_size
    if output_size == 0:
        raise OutputFileAccessError(
            f"Output file not created after optimizing. We probably ran "
@@ -544,7 +617,7 @@ def optimize(input_file, output_file, context, save_settings):
        )
    ratio = input_size / output_size
    savings = 1 - output_size / input_size
-    log.info(f"Optimize ratio: {ratio:.2f} savings: {(100 * savings):.1f}%")
+    log.info(f"Optimize ratio: {ratio:.2f} savings: {(savings):.1%}")

    if savings < 0:
        log.info("Image optimization did not improve the file - discarded")
@@ -557,8 +630,8 @@ def optimize(input_file, output_file, context, save_settings):


 def main(infile, outfile, level, jobs=1):
-    from tempfile import TemporaryDirectory  # pylint: disable=import-outside-toplevel
    from shutil import copy  # pylint: disable=import-outside-toplevel
+    from tempfile import TemporaryDirectory  # pylint: disable=import-outside-toplevel

    class OptimizeOptions:
        """Emulate ocrmypdf's options"""
@@ -576,6 +649,7 @@ def main(infile, outfile, level, jobs=1):
            self.quiet = True
            self.progress_bar = False

+    infile = Path(infile)
    options = OptimizeOptions(
        input_file=infile,
        jobs=jobs,
@@ -1,39 +1,17 @@
-# © 2015 James R. Barlow: github.com/jbarlow83
+# © 2020 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 """
-Generate a PDFMARK file for Ghostscript >= 9.14, for PDF/A conversion
-
-pdfmark is an extension to the Postscript language that describes some PDF
-features like bookmarks and annotations. It was originally specified Adobe
-Distiller, for Postscript to PDF conversion:
-https://www.adobe.com/content/dam/acom/en/devnet/acrobat/pdfs/pdfmark_reference.pdf
-
-Ghostscript uses pdfmark for PDF to PDF/A conversion as well. To use Ghostscript
-to create a PDF/A, we need to create a pdfmark file with the necessary metadata.
-
-This takes care of the many version-specific bugs and pecularities in
-Ghostscript's handling of pdfmark.
-
+Utilities for PDF/A production and confirmation with Ghostspcript.
 """

 import base64
 from pathlib import Path
-from string import Template
+from typing import Dict, Iterator, Union

 import pikepdf
 import pkg_resources
@@ -43,58 +21,88 @@ ICC_PROFILE_RELPATH = 'data/sRGB.icc'
 SRGB_ICC_PROFILE = pkg_resources.resource_filename('ocrmypdf', ICC_PROFILE_RELPATH)


-# This is a template written in PostScript which is needed to create PDF/A
-# files, from the Ghostscript documentation. Lines beginning with % are
-# comments. Python substitution variables have a '$' prefix.
-pdfa_def_template = u"""%!
-% Define an ICC profile :
-/ICCProfile $icc_profile
-def
+def _postscript_objdef(
+    alias: str,
+    dictionary: Dict[str, str],
+    *,
+    stream_name: str = None,
+    stream_data: bytes = None,
+) -> Iterator[str]:
+    assert (stream_name is None) == (stream_data is None)

-[/_objdef {icc_PDFA} /type /stream /OBJ pdfmark
-[{icc_PDFA} << /N 3 >> /PUT pdfmark
-[{icc_PDFA} ICCProfile /PUT pdfmark
+    objtype = '/stream' if stream_name else '/dict'

-% Define the output intent dictionary :
+    if stream_name:
+        a85_data = base64.a85encode(stream_data, adobe=True).decode('ascii')
+        yield f'{stream_name} ' + a85_data
+        yield 'def'

-[/_objdef {OutputIntent_PDFA} /type /dict /OBJ pdfmark
-[{OutputIntent_PDFA} <<
-  /Type /OutputIntent             % Must be so (the standard requires).
-  /S /GTS_PDFA1                   % Must be so (the standard requires).
-  /DestOutputProfile {icc_PDFA}            % Must be so (see above).
-  /OutputConditionIdentifier ($icc_identifier)
->> /PUT pdfmark
-[{Catalog} <</OutputIntents [ {OutputIntent_PDFA} ]>> /PUT pdfmark
-"""
+    if alias != '{Catalog}':  # Catalog needs no definition
+        yield f'[/_objdef {alias} /type {objtype} /OBJ pdfmark'
+
+    yield f'[{alias} <<'
+    for key, val in dictionary.items():
+        yield f'  {key} {val}'
+    yield '>> /PUT pdfmark'
+
+    if stream_name:
+        yield f'[{alias} {stream_name[1:]} /PUT pdfmark'


-def generate_pdfa_ps(target_filename, icc='sRGB'):
-    """Create a Postscript pdfmark file for Ghostscript PDF/A conversion
+def _make_postscript(icc_name: str, icc_data: bytes, colors: int) -> Iterator[str]:
+    yield '%!'
+    yield from _postscript_objdef(
+        '{icc_PDFA}',  # Not an f-string
+        {'/N': str(colors)},
+        stream_name='/ICCProfile',
+        stream_data=icc_data,
+    )
+    yield ''
+    yield from _postscript_objdef(
+        '{OutputIntent_PDFA}',
+        {
+            '/Type': '/OutputIntent',
+            '/S': '/GTS_PDFA1',
+            '/DestOutputProfile': '{icc_PDFA}',
+            '/OutputConditionIdentifier': f'({icc_name})',  # Only f-string
+        },
+    )
+    yield ''
+    yield from _postscript_objdef(
+        '{Catalog}', {'/OutputIntents': '[ {OutputIntent_PDFA} ]'}
+    )

-    A pdfmark file is a small Postscript program that provides some information
-    Ghostscript needs to perform PDF/A conversion. The only information we put
-    in specifies that we want the file to be a PDF/A, and we want to Ghostscript
-    to convert objects to the sRGB colorspace if it runs into any object that
-    it decides must be converted.

-    See the Adobe pdfmark Reference for details:
-    https://www.adobe.com/content/dam/acom/en/devnet/acrobat/pdfs/pdfmark_reference.pdf
+def generate_pdfa_ps(target_filename: Path, icc: str = 'sRGB'):
+    """Create a Postscript PDFMARK file for Ghostscript PDF/A conversion

-    :param target_filename: filename to save
-    :param icc: ICC identifier such as 'sRGB'
+    pdfmark is an extension to the Postscript language that describes some PDF
+    features like bookmarks and annotations. It was originally specified Adobe
+    Distiller, for Postscript to PDF conversion.
+
+    Ghostscript uses pdfmark for PDF to PDF/A conversion as well. To use Ghostscript
+    to create a PDF/A, we need to create a pdfmark file with the necessary metadata.
+
+    This function takes care of the many version-specific bugs and pecularities in
+    Ghostscript's handling of pdfmark.
+
+    The only information we put in specifies that we want the file to be a
+    PDF/A, and we want to Ghostscript to convert objects to the sRGB colorspace
+    if it runs into any object that it decides must be converted.
+
+    Arguments:
+        target_filename: filename to save
+        icc: ICC identifier such as 'sRGB'
+    References:
+        Adobe PDFMARK Reference: https://www.adobe.com/content/dam/acom/en/devnet/acrobat/pdfs/pdfmark_reference.pdf
    """
    if icc == 'sRGB':
        icc_profile = SRGB_ICC_PROFILE
    else:
        raise NotImplementedError("Only supporting sRGB")

-    # Read the ICC profile, encode as ASCII85 and convert to a string which we
-    # will insert in the .ps file
    bytes_icc_profile = Path(icc_profile).read_bytes()
-    icc_profile = base64.a85encode(bytes_icc_profile, adobe=True).decode('ascii')
-
-    t = Template(pdfa_def_template)
-    ps = t.substitute(icc_profile=icc_profile, icc_identifier=icc)
+    ps = '\n'.join(_make_postscript(icc, bytes_icc_profile, 3))

    # We should have encoded everything to pure ASCII by this point, and
    # to be safe, only allow ASCII in PostScript
@@ -102,7 +110,7 @@ def generate_pdfa_ps(target_filename, icc='sRGB'):
    return target_filename


-def file_claims_pdfa(filename):
+def file_claims_pdfa(filename: Path):
    """Determines if the file claims to be PDF/A compliant

    This only checks if the XMP metadata contains a PDF/A marker. It does not
@@ -119,7 +127,7 @@ def file_claims_pdfa(filename):
            }
        valid_part_conforms = {'1A', '1B', '2A', '2B', '2U', '3A', '3B', '3U'}
        conformance = f'PDF/A-{pdfmeta.pdfa_status}'
-        pdfa_dict = {}
+        pdfa_dict: Dict[str, Union[str, bool]] = {}
        if pdfmeta.pdfa_status in valid_part_conforms:
            pdfa_dict['pass'] = True
            pdfa_dict['output'] = 'pdfa'
@@ -1,19 +1,9 @@
 #!/usr/bin/env python3
 # © 2015 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 from ocrmypdf.pdfinfo.info import Colorspace, Encoding, PdfInfo
@@ -1,20 +1,10 @@
 #!/usr/bin/env python3
 # © 2015 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 import re
@@ -25,7 +15,7 @@ from functools import partial
 from math import hypot, isclose
 from os import PathLike
 from pathlib import Path
-from typing import Any, Dict, List
+from typing import Any, Dict, List, Optional, Union
 from warnings import warn

 import pikepdf
@@ -33,7 +23,7 @@ from pikepdf import PdfMatrix

 from ocrmypdf._concurrent import exec_progress_pool
 from ocrmypdf.exceptions import EncryptedPdfError
-from ocrmypdf.helpers import Resolution, available_cpu_count
+from ocrmypdf.helpers import Resolution, available_cpu_count, pikepdf_enable_mmap
 from ocrmypdf.pdfinfo.layout import get_page_analysis, get_text_boxes

 logger = logging.getLogger()
@@ -91,7 +81,7 @@ UNIT_SQUARE = (1.0, 0.0, 0.0, 1.0, 0.0, 0.0)
 def _is_unit_square(shorthand):
    values = map(float, shorthand)
    pairwise = zip(values, UNIT_SQUARE)
-    return all([isclose(a, b, rel_tol=1e-3) for a, b in pairwise])
+    return all(isclose(a, b, rel_tol=1e-3) for a, b in pairwise)


 XobjectSettings = namedtuple('XobjectSettings', ['name', 'shorthand', 'stack_depth'])
@@ -237,7 +227,7 @@ def _get_dpi(ctm_shorthand, image_size):
    width-axis vector v0 (1, 0), height-axis vector vh (0, 1) with the matrix,
    which gives the dimensions of the image in PDF units. From there we can
    compare to actual image dimensions. PDF uses
-    row vector * matrix_tranposed unlike the traditional
+    row vector * matrix_transposed unlike the traditional
    matrix * column vector.

    The offset, width and height vectors can be combined in a matrix and
@@ -523,7 +513,7 @@ def _process_content_streams(*, pdf, container, shorthand=None):
    yield from _find_form_xobject_images(pdf, container, contentsinfo)


-def _page_has_text(text_blocks, page_width, page_height):
+def _page_has_text(text_blocks, page_width, page_height) -> bool:
    """Smarter text detection that ignores text in margins"""

    pw, ph = float(page_width), float(page_height)
@@ -567,7 +557,7 @@ def simplify_textboxes(miner, textbox_getter):


 def _pdf_get_pageinfo(
-    pdf, pageno: int, infile: PathLike, check_pages, detailed_analysis
+    pdf, pageno: int, infile: PathLike, check_pages, detailed_analysis: bool
 ):
    pageinfo: Dict[str, Any] = {}
    pageinfo['pageno'] = pageno
@@ -639,6 +629,10 @@ worker_pdf = None

 def _pdf_pageinfo_sync_init(infile):
    global worker_pdf  # pylint: disable=global-statement
+    pikepdf_enable_mmap()
+    # If this function is called as a thread initializer, we need a messy hack
+    # to close worker_pdf. If called as a process, it will be released when the
+    # process is terminated.
    worker_pdf = pikepdf.open(infile)


@@ -652,6 +646,7 @@ def _pdf_pageinfo_sync(args):
 def _pdf_pageinfo_concurrent(
    pdf, infile, progbar, max_workers, check_pages, detailed_analysis=False
 ):
+    global worker_pdf  # pylint: disable=global-statement
    pages = [None] * len(pdf.pages)

    def update_pageinfo(result, pbar):
@@ -672,17 +667,23 @@ def _pdf_pageinfo_concurrent(
        # a separate process.
        use_threads = True

-    exec_progress_pool(
-        use_threads=use_threads,
-        max_workers=n_workers,
-        tqdm_kwargs=dict(
-            total=total, desc="Scanning contents", unit='page', disable=not progbar
-        ),
-        task_initializer=partial(_pdf_pageinfo_sync_init, infile),
-        task=_pdf_pageinfo_sync,
-        task_arguments=contexts,
-        task_finished=update_pageinfo,
-    )
+    try:
+        exec_progress_pool(
+            use_threads=use_threads,
+            max_workers=n_workers,
+            tqdm_kwargs=dict(
+                total=total, desc="Scanning contents", unit='page', disable=not progbar
+            ),
+            task_initializer=partial(_pdf_pageinfo_sync_init, infile),
+            task=_pdf_pageinfo_sync,
+            task_arguments=contexts,
+            task_finished=update_pageinfo,
+        )
+    finally:
+        if worker_pdf and use_threads:
+            assert n_workers == 1, "Should have only one worker when threaded"
+            # This is messy, but if we ran in thread, close worker_pdf
+            worker_pdf.close()
    return pages


@@ -696,41 +697,41 @@ class PageInfo:
        )

    @property
-    def pageno(self):
+    def pageno(self) -> int:
        return self._pageno

    @property
-    def has_text(self):
+    def has_text(self) -> bool:
        return self._pageinfo['has_text']

    @property
-    def has_corrupt_text(self):
+    def has_corrupt_text(self) -> bool:
        if not self._detailed_analysis:
            raise NotImplementedError('Did not do detailed analysis')
        return any(tbox.is_corrupt for tbox in self._pageinfo['textboxes'])

    @property
-    def has_vector(self):
+    def has_vector(self) -> bool:
        return self._pageinfo['has_vector']

    @property
-    def width_inches(self):
+    def width_inches(self) -> Decimal:
        return self._pageinfo['width_inches']

    @property
-    def height_inches(self):
+    def height_inches(self) -> Decimal:
        return self._pageinfo['height_inches']

    @property
-    def width_pixels(self):
+    def width_pixels(self) -> int:
        return int(round(float(self.width_inches) * self.dpi.x))

    @property
-    def height_pixels(self):
+    def height_pixels(self) -> int:
        return int(round(float(self.height_inches) * self.dpi.y))

    @property
-    def rotation(self):
+    def rotation(self) -> int:
        return self._pageinfo.get('rotate', None)

    @rotation.setter
@@ -744,7 +745,9 @@ class PageInfo:
    def images(self):
        return self._pageinfo['images']

-    def get_textareas(self, visible=None, corrupt=None):
+    def get_textareas(
+        self, visible: Optional[bool] = None, corrupt: Optional[bool] = None
+    ):
        def predicate(obj, want_visible, want_corrupt):
            result = True
            if want_visible is not None:
@@ -767,15 +770,15 @@ class PageInfo:
        )

    @property
-    def dpi(self):
+    def dpi(self) -> Resolution:
        return self._pageinfo.get('dpi', Resolution(0.0, 0.0))

    @property
-    def userunit(self):
+    def userunit(self) -> Decimal:
        return self._pageinfo.get('userunit', None)

    @property
-    def min_version(self):
+    def min_version(self) -> str:
        if self.userunit is not None:
            return '1.6'
        else:
@@ -795,9 +798,9 @@ class PdfInfo:
    def __init__(
        self,
        infile,
-        detailed_analysis=False,
-        progbar=False,
-        max_workers=None,
+        detailed_analysis: bool = False,
+        progbar: bool = False,
+        max_workers: int = None,
        check_pages=None,
    ):
        self._infile = infile
@@ -815,12 +818,12 @@ class PdfInfo:
                check_pages=check_pages,
                detailed_analysis=detailed_analysis,
            )
-            self._needs_rendering = pdf.root.get('/NeedsRendering', False)
+            self._needs_rendering = pdf.Root.get('/NeedsRendering', False)
            self._has_acroform = False
-            if '/AcroForm' in pdf.root:
-                if len(pdf.root.AcroForm.get('/Fields', [])) > 0:
+            if '/AcroForm' in pdf.Root:
+                if len(pdf.Root.AcroForm.get('/Fields', [])) > 0:
                    self._has_acroform = True
-                elif '/XFA' in pdf.root.AcroForm:
+                elif '/XFA' in pdf.Root.AcroForm:
                    self._has_acroform = True

    @property
@@ -828,29 +831,29 @@ class PdfInfo:
        return self._pages

    @property
-    def min_version(self):
+    def min_version(self) -> str:
        # The minimum PDF is the maximum version that any particular page needs
        return max(page.min_version for page in self.pages)

    @property
-    def has_userunit(self):
+    def has_userunit(self) -> bool:
        return any(page.userunit != 1.0 for page in self.pages)

    @property
-    def has_acroform(self):
+    def has_acroform(self) -> bool:
        return self._has_acroform

    @property
-    def filename(self):
+    def filename(self) -> Union[str, Path]:
        if not isinstance(self._infile, (str, Path)):
            raise NotImplementedError("can't get filename from stream")
        return self._infile

    @property
-    def needs_rendering(self):
+    def needs_rendering(self) -> bool:
        return self._needs_rendering

-    def __getitem__(self, item):
+    def __getitem__(self, item) -> PageInfo:
        return self._pages[item]

    def __len__(self):
@@ -1,19 +1,9 @@
 # © 2018 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import re
 from math import copysign
@@ -220,8 +210,16 @@ class TextPositionTracker(PDFLayoutAnalyzer):

 def get_page_analysis(infile, pageno, pscript5_mode):
    rman = pdfminer.pdfinterp.PDFResourceManager(caching=True)
+    if pdfminer.__version__ < '20200402':
+        # Workaround for https://github.com/pdfminer/pdfminer.six/issues/395
+        disable_boxes_flow = 2
+    else:
+        disable_boxes_flow = None
    dev = TextPositionTracker(
-        rman, laparams=LAParams(all_texts=True, detect_vertical=True)
+        rman,
+        laparams=LAParams(
+            all_texts=True, detect_vertical=True, boxes_flow=disable_boxes_flow
+        ),
    )
    interp = pdfminer.pdfinterp.PDFPageInterpreter(rman, dev)

@@ -1,19 +1,9 @@
 # © 2020 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 from abc import ABC, abstractmethod, abstractstaticmethod
 from argparse import ArgumentParser, Namespace
@@ -22,11 +12,12 @@ from pathlib import Path
 from typing import TYPE_CHECKING, AbstractSet, List, Optional

 import pluggy
-from PIL import Image

 from ocrmypdf.helpers import Resolution

 if TYPE_CHECKING:
+    from PIL import Image
+
    from ocrmypdf._jobcontext import PageContext
    from ocrmypdf.pdfinfo import PdfInfo

@@ -98,9 +89,9 @@ def rasterize_pdf_page(
    raster_device: str,
    raster_dpi: Resolution,
    pageno: int,
-    page_dpi: Optional[Resolution] = None,
-    rotation: Optional[int] = None,
-    filter_vector: bool = False,
+    page_dpi: Optional[Resolution],
+    rotation: Optional[int],
+    filter_vector: bool,
 ) -> Path:
    """Rasterize one page of a PDF at resolution raster_dpi in canvas units.

@@ -118,23 +109,39 @@ def rasterize_pdf_page(
        rotation: Cardinal angle, clockwise, to rotate page
        filter_vector: If True, remove vector graphics objects
    Returns:
-        output_file
+        Path: output_file if successful
    Note:
        This hook will be called from child processes. Modifying global state
        will not affect the main process or other child processes.
+    Note:
+        This is a :ref:`firstresult hook<firstresult>`.
    """


@hookspec(firstresult=True)
-def filter_ocr_image(page: 'PageContext', image: Image) -> Image:
+def filter_ocr_image(page: 'PageContext', image: 'Image') -> 'Image':
    """Called to filter the image before it is sent to OCR.

    This is the image that OCR sees, not what the user sees when they view the
-    PDF.
+    PDF. If ``redo_ocr`` is enabled, portions of the image will be masked so
+    they are not shown to OCR. The main use of this hook is expected to be hiding
+    content from OCR.
+
+    The input image may be color, grayscale, or monochrome, and the
+    output image may differ. The pixel width and height of the
+    output image must be identical to the input image, or misalignment between
+    the OCR text layer and visual position of the text will occur. Likewise,
+    the output must be a faithful representation of the input, or alignment
+    errors may occurs.
+
+    Tesseract OCR only deals with monochrome images, and internally converts
+    non-monochrome images to OCR.

    Note:
        This hook will be called from child processes. Modifying global state
        will not affect the main process or other child processes.
+    Note:
+        This is a :ref:`firstresult hook<firstresult>`.
    """


@@ -147,32 +154,78 @@ def filter_page_image(page: 'PageContext', image_filename: Path) -> Path:
    produced for a given page, this function will not be called. This is not
    the image that will be shown to OCR.

-    ocrmypdf will create the PDF page based on the image format used. If you
+    If the function does not want to modify the image, it should return
+    ``image_filename``. The hook may overwrite ``image_filename`` with a new file.
+
+    The output image should preserve the same physical unit dimensions, that is
+    (width * dpi_x, height * dpi_y). That is, if the image is resized, the DPI
+    must be adjusted by the reciprocal. If this is not preserved, the PDF page
+    will be resized and the OCR layer misaligned. OCRmyPDF does not nothing
+    to enforce these constraints; it is up to the plugin to do sensible things.
+
+    OCRmyPDF will create the PDF page based on the image format used. If you
    convert the image to a JPEG, the output page will be created as a JPEG, etc.
-    Note that the ocrmypdf image optimization stage may ultimately chose a
+    If you change the colorspace, that change will be kept. Note that the
+    OCRmyPDF image optimization stage, if enabled, may ultimately chose a
    different format.

+    If the return value is a file that does not exist, ``FileNotFoundError``
+    will occur. The return value should be a path to a file in the same folder
+    as ``image_filename``.
+
+    Implementation detail: If the value returned is falsy, OCRmyPDF will ignore
+    the return value and assume the input file was unmodified. This is deprecated.
+    To leave the image unmodified, ``image_filename`` should be returned.
+
    Note:
        This hook will be called from child processes. Modifying global state
        will not affect the main process or other child processes.
+    Note:
+        This is a :ref:`firstresult hook<firstresult>`.
    """


 OrientationConfidence = namedtuple('OrientationConfidence', ('angle', 'confidence'))
+"""Expresses an OCR engine's confidence in page rotation.
+
+Attributes:
+    angle (int): The clockwise angle (0, 90, 180, 270) that the page should be
+        rotated. 0 means no rotation.
+    confidence (float): How confident the OCR engine is that this the correct
+        rotation. 0 is not confident, 15 is very confident. Arbitrary units.
+"""


 class OcrEngine(ABC):
+    """A class representing an OCR engine with capabilities similar to Tesseract OCR.
+
+    This could be used to create a plugin for another OCR engine instead of
+    Tesseract OCR.
+    """
+
    @abstractstaticmethod
    def version() -> str:
        """Returns the version of the OCR engine."""

    @abstractstaticmethod
    def creator_tag(options: Namespace) -> str:
-        """Returns the creator tag to identify this software's role in creating the PDF."""
+        """Returns the creator tag to identify this software's role in creating the PDF.
+
+        This tag will be inserted in the XMP metadata and DocumentInfo dictionary
+        as appropriate. Ideally you should include the name of the OCR engine and its
+        version. The text should not contain line breaks. This is to help developers
+        like yourself identify the software that produced this file.
+
+        OCRmyPDF will always prepend its name to this value.
+        """

    @abstractmethod
    def __str__(self):
-        """Returns name of OCR engine and version."""
+        """Returns name of OCR engine and version.
+
+        This is used when OCRmyPDF wants to mention the name of the OCR engine
+        to the user, usually in an error message.
+        """

    @abstractstaticmethod
    def languages(options: Namespace) -> AbstractSet[str]:
@@ -213,6 +266,9 @@ def get_ocr_engine() -> OcrEngine:
    The OcrEngine may be instantiated multiple times, by both the main process
    and child process. As such, it must be obtain store any state in ``options``
    or some common location.
+
+    Note:
+        This is a :ref:`firstresult hook<firstresult>`.
    """


@@ -248,5 +304,8 @@ def generate_pdfa(
        pdfa_part: The desired PDF/A compliance level, such as ``'2B'``.

    Returns:
-        output_file: If successful, the hook should return ``output_file``.
+        Path: If successful, the hook should return ``output_file``.
+
+    Note:
+        This is a :ref:`firstresult hook<firstresult>`.
    """
@@ -1,37 +1,27 @@
 # © 2020 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+
+"""Utilities to measure OCR quality"""
+

 import re
 from typing import Iterable

-"""Utilities to measure OCR quality"""
-

 class OcrQualityDictionary:
    """Manages a dictionary for simple OCR quality checks."""

-    def __init__(self, *, wordlist: Iterable[str] = []):
+    def __init__(self, *, wordlist: Iterable[str]):
        """Construct a dictionary from a list of words.

        Words for which capitalization is important should be capitalized in the
        dictionary. Words that contain spaces or other punctuation will never match.
        """
-        self.dictionary = set()
-        self.dictionary.update(w for w in wordlist)
+        self.dictionary = set(wordlist)

    def measure_words_matched(self, ocr_text: str) -> float:
        """Check how many unique words in the OCR text match a dictionary.
@@ -1,19 +1,9 @@
 # © 2020 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 """Wrappers to manage subprocess calls"""

@@ -35,19 +25,21 @@ from ocrmypdf.exceptions import MissingDependencyError
 log = logging.getLogger(__name__)


-def run(args, *, env=None, **kwargs):
-    """Wrapper around subprocess.run()
+def run(args, *, env=None, logs_errors_to_stdout=False, **kwargs):
+    """Wrapper around :py:func:`subprocess.run`

-    The main purpose of this wrapper is to log subprocess output.
+    The main purpose of this wrapper is to log subprocess output in an orderly
+    fashion that indentifies the responsible subprocess. An additional
+    task is that this function goes to greater lengths to find possible Windows
+    locations of our dependencies when they are not on the system PATH.

-    Secondly we have to account for behavioral differences in Windows in particular.
-    Creating symbolic links in Windows requires administrator privileges and
-    may not work if for some reason we're using a FAT file system or the temporary
-    folder is on a different drive from the working folder. The test suite
-    works around this by creating shim Python scripts that perform the same function
-    as a symbolic link, but those shims require support on this side, to ensure
-    we call them with Python.
+    Arguments should be identical to ``subprocess.run``, except for following:

+    Arguments:
+        logs_errors_to_stdout: If True, indicates that the process writes its error
+            messages to stdout rather than stderr, so stdout should be logged
+            if there is an error. If False, stderr is logged. Could be used with
+            stderr=STDOUT, stdout=PIPE for example.
    """
    if not env:
        env = os.environ
@@ -59,25 +51,29 @@ def run(args, *, env=None, **kwargs):
        args = _fix_windows_args(program, args, env)

    log.debug("Running: %s", args)
-    process_log = log.getChild('subprocess.' + os.path.basename(program))
+    process_log = log.getChild(os.path.basename(program))
    if sys.version_info < (3, 7) and os.name == 'nt':
        # Can't use close_fds=True on Windows with Python 3.6 or older
        # https://bugs.python.org/issue19575, etc.
        kwargs['close_fds'] = False

    stderr = None
+    stderr_name = 'stderr' if not logs_errors_to_stdout else 'stdout'
    try:
        proc = subprocess_run(args, env=env, **kwargs)
    except CalledProcessError as e:
-        stderr = getattr(e, 'stderr', None)
+        stderr = getattr(e, stderr_name, None)
        raise
    else:
-        stderr = getattr(proc, 'stderr', None)
+        stderr = getattr(proc, stderr_name, None)
    finally:
        if process_log.isEnabledFor(logging.DEBUG) and stderr:
            with suppress(AttributeError, UnicodeDecodeError):
                stderr = stderr.decode('utf-8', 'replace')
-            process_log.debug("stderr = %s", stderr)
+            if logs_errors_to_stdout:
+                process_log.debug("stdout/stderr = %s", stderr)
+            else:
+                process_log.debug("stderr = %s", stderr)
    return proc


@@ -106,8 +102,18 @@ def _fix_windows_args(program, args, env):


@lru_cache(maxsize=None)
-def get_version(program, *, version_arg='--version', regex=r'(\d+(\.\d+)*)', env=None):
-    """Get the version of the specified program"""
+def get_version(
+    program: str, *, version_arg: str = '--version', regex=r'(\d+(\.\d+)*)', env=None
+):
+    """Get the version of the specified program
+
+    Arguments:
+        program: The program to version check.
+        version_arg: The argument needed to ask for its version, e.g. ``--version``.
+        regex: A regular expression to parse the program's output and obtain the
+            version.
+        env: Custom ``os.environ`` in which to run program.
+    """
    args_prog = [program, version_arg]
    try:
        proc = run(
@@ -1,19 +1,9 @@
 # © 2017 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import os
 import platform
@@ -1,40 +0,0 @@
-# © 2019 James R. Barlow: github.com/jbarlow83
-#
-# Permission is hereby granted, free of charge, to any person obtaining a
-# copy of this software and associated documentation files (the
-# "Software"), to deal in the Software without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Software, and to
-# permit persons to whom the Software is furnished to do so, subject to
-# the following conditions:
-#
-# The above copyright notice and this permission notice shall be included
-# in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-"""Find Ghostscript executable"""
-
-
-import os
-import shutil
-
-
-def real_ghostscript(argv):
-    if os.name != 'nt':
-        gs = shutil.which('gs')
-        gs_args = [gs] + argv[1:]
-        os.execv(gs_args[0], gs_args)
-    else:
-        gs = shutil.which('gswin64c')
-        if not gs:
-            gs = shutil.which('gswin32c')
-        os.execv(gs, argv[1:])
-
-    return  # Not reachable
@@ -1,19 +1,9 @@
 # © 2019 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging

@@ -1,19 +1,9 @@
 # © 2019 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 from io import BytesIO, StringIO
@@ -1,19 +1,9 @@
 # © 2018 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import pytest

@@ -1,19 +1,9 @@
 # © 2019 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 from subprocess import PIPE, run

@@ -1,19 +1,9 @@
 # © 2019 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 from decimal import Decimal
@@ -1,19 +1,9 @@
 # © 2019 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 from unittest.mock import patch

@@ -1,19 +1,9 @@
 # © 2019 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 import multiprocessing
@@ -22,7 +12,7 @@ from unittest.mock import MagicMock

 import pytest

-import ocrmypdf.helpers as helpers
+from ocrmypdf import helpers as helpers
 from ocrmypdf.subprocess import shim_paths_with_program_files


@@ -1,19 +1,9 @@
 # © 2015 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import re
 from io import StringIO
@@ -1,19 +1,9 @@
 # © 2019 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 from unittest.mock import patch

@@ -1,42 +1,29 @@
 # © 2018 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.


-import os
 from os import fspath
 from pickle import dumps, loads
-from unittest.mock import patch

 import pytest
 from PIL import Image, ImageChops

-import ocrmypdf.leptonica as lept
+from ocrmypdf import leptonica as lp


 def test_colormap_backgroundnorm(resources):
    # Issue #262 - unclear how to reproduce exactly, so just ensure leptonica
    # can handle that case
-    pix = lept.Pix.open(resources / 'baiona_colormapped.png')
+    pix = lp.Pix.open(resources / 'baiona_colormapped.png')
    pix.background_norm()


@pytest.fixture
 def crom_pix(resources):
-    pix = lept.Pix.open(resources / 'crom.png')
+    pix = lp.Pix.open(resources / 'crom.png')
    im = Image.open(resources / 'crom.png')
    yield pix, im
    im.close()
@@ -64,17 +51,17 @@ def test_pix_otsu(crom_pix):


@pytest.mark.skipif(
-    lept.get_leptonica_version() < 'leptonica-1.76',
+    lp.get_leptonica_version() < 'leptonica-1.76',
    reason="needs new leptonica for API change",
 )
 def test_crop(resources):
-    pix = lept.Pix.open(resources / 'linn.png')
+    pix = lp.Pix.open(resources / 'linn.png')
    foreground = pix.crop_to_foreground()
    assert foreground.width < pix.width


 def test_clean_bg(resources):
-    pix = lept.Pix.open(resources / 'congress.jpg')
+    pix = lp.Pix.open(resources / 'congress.jpg')
    imbg = pix.clean_background_to_white()


@@ -96,4 +83,14 @@ def test_leptonica_compile(tmp_path):

 def test_file_not_found():
    with pytest.raises(FileNotFoundError):
-        lept.Pix.open("does_not_exist1")
+        lp.Pix.open("does_not_exist1")
+
+
+@pytest.mark.skipif(
+    lp.get_leptonica_version() < 'leptonica-1.79.0',
+    reason="test not reliable on all platforms for old leptonica",
+)
+def test_error_trap():
+    with pytest.raises(lp.LeptonicaError, match=r"Error in pixReadMem"):
+        with lp._LeptonicaErrorTrap():
+            lp.Pix(lp.lept.pixReadMem(lp.ffi.NULL, 0))
@@ -1,19 +1,9 @@
 # © 2015-19 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import os
 import shutil
@@ -256,7 +246,7 @@ def test_missing_docinfo(resources, outpdf):
        'eng',
        '--skip-text',
        '--plugin',
-        'tests/plugins/tesseract_noop.py',
+        Path('tests/plugins/tesseract_noop.py'),
    )
    assert result == ExitCode.ok

@@ -877,3 +867,17 @@ def test_image_dpi_not_image(caplog, resources, outpdf):
        'tests/plugins/tesseract_noop.py',
    )
    assert '--image-dpi is being ignored' in caplog.text
+
+
+def test_image_dpi_threshold(resources, outpdf):
+    check_ocrmypdf(
+        resources / 'typewriter.png',
+        outpdf,
+        '--threshold',
+        '--image-dpi=170',
+        '--output-type=pdf',
+        '--optimize=0',
+        '--plugin',
+        'tests/plugins/tesseract_noop.py',
+    )
+    assert outpdf.exists()
@@ -1,19 +1,8 @@
 # © 2018 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.


 import datetime
@@ -313,8 +302,8 @@ def test_kodak_toc(resources, outpdf):

    p = pikepdf.open(outpdf)

-    if pikepdf.Name.First in p.root.Outlines:
-        assert isinstance(p.root.Outlines.First, pikepdf.Dictionary)
+    if pikepdf.Name.First in p.Root.Outlines:
+        assert isinstance(p.Root.Outlines.First, pikepdf.Dictionary)


 def test_metadata_fixup_warning(resources, outdir, caplog):
@@ -1,19 +1,9 @@
 # © 2018 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 from os import fspath
 from pathlib import Path
@@ -1,19 +1,9 @@
 # © 2019 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import pytest

@@ -1,19 +1,9 @@
 # © 2015 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import pickle
 from math import isclose
@@ -1,19 +1,9 @@
 # © 2019 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 from math import isclose

@@ -1,23 +1,13 @@
 # © 2020 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import pytest

-import ocrmypdf.quality as qual
+from ocrmypdf import quality as qual


 def test_quality_measurement():
@@ -1,19 +1,9 @@
 # © 2018 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 from io import BytesIO
 from os import fspath
@@ -25,6 +15,7 @@ from PIL import Image

 from ocrmypdf import leptonica
 from ocrmypdf._exec import ghostscript, tesseract
+from ocrmypdf._plugin_manager import get_plugin_manager
 from ocrmypdf.helpers import Resolution
 from ocrmypdf.pdfinfo import PdfInfo

@@ -266,3 +257,33 @@ def test_tesseract_orientation(resources, tmp_path):
    tesseract.get_orientation(  # Test results of this are unreliable
        tmp_path / '000001.png', engine_mode='3', timeout=10
    )
+
+
+def test_rasterize_rotates(resources, tmp_path):
+    pm = get_plugin_manager([])
+
+    img = tmp_path / 'img90.png'
+    pm.hook.rasterize_pdf_page(
+        input_file=resources / 'graph.pdf',
+        output_file=img,
+        raster_device='pngmono',
+        raster_dpi=Resolution(20, 20),
+        page_dpi=Resolution(20, 20),
+        pageno=1,
+        rotation=90,
+        filter_vector=False,
+    )
+    assert Image.open(img).size == (123, 151), "Image not rotated"
+
+    img = tmp_path / 'img180.png'
+    pm.hook.rasterize_pdf_page(
+        input_file=resources / 'graph.pdf',
+        output_file=img,
+        raster_device='pngmono',
+        raster_dpi=Resolution(20, 20),
+        page_dpi=Resolution(20, 20),
+        pageno=1,
+        rotation=180,
+        filter_vector=False,
+    )
+    assert Image.open(img).size == (151, 123), "Image not rotated"
@@ -1,19 +1,9 @@
 # © 2019 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import os
 import sys
@@ -1,19 +1,9 @@
 # © 2017 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 import os
@@ -1,19 +1,9 @@
 # © 2015-17 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 from os import fspath
 from unittest.mock import patch
@@ -1,19 +1,9 @@
 # © 2017 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 from math import isclose

@@ -1,19 +1,9 @@
 # © 2019 James R. Barlow: github.com/jbarlow83
 #
-# This file is part of OCRmyPDF.
-#
-# OCRmyPDF is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# OCRmyPDF is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with OCRmyPDF.  If not, see <http://www.gnu.org/licenses/>.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+

 import logging
 from unittest.mock import patch
@@ -21,7 +11,7 @@ from unittest.mock import patch
 import pikepdf
 import pytest

-import ocrmypdf._validation as vd
+from ocrmypdf import _validation as vd
 from ocrmypdf._plugin_manager import get_plugin_manager
 from ocrmypdf.api import create_options
 from ocrmypdf.cli import get_parser
@@ -65,7 +55,7 @@ def test_old_ghostscript(caplog):
        vd._check_options(
            *make_opts_pm(language='chi_sim', output_type='pdfa'), {'chi_sim'}
        )
-        assert 'Ghostscript does not work correctly' in caplog.text
+        assert 'does not work correctly' in caplog.text

    with patch('ocrmypdf._exec.ghostscript.version', return_value='9.18'), patch(
        'ocrmypdf._exec.tesseract.has_textonly_pdf', return_value=True
@@ -141,15 +131,15 @@ def test_report_file_size(tmp_path, caplog):
    pdf = pikepdf.new()
    pdf.save(in_)
    pdf.save(out)
-    opts = make_opts()
+    opts = make_opts(output_type='pdf')
    vd.report_output_file_size(opts, in_, out)
    assert caplog.text == ''
    caplog.clear()

    waste_of_space = b'Dummy' * 5000
-    pdf.root.Dummy = waste_of_space
+    pdf.Root.Dummy = waste_of_space
    pdf.save(in_)
-    pdf.root.Dummy2 = waste_of_space + waste_of_space
+    pdf.Root.Dummy2 = waste_of_space + waste_of_space
    pdf.save(out)

    with patch('ocrmypdf._validation.jbig2enc.available', return_value=True), patch(
@@ -166,7 +156,7 @@ def test_report_file_size(tmp_path, caplog):
        assert 'optional dependency' in caplog.text
    caplog.clear()

-    opts = make_opts(in_, out, optimize=0)
+    opts = make_opts(in_, out, optimize=0, output_type='pdf')
    vd.report_output_file_size(opts, in_, out)
    assert 'disabled' in caplog.text
    caplog.clear()
Author	SHA1	Message	Date
James R. Barlow	14a85f9473	Fix pinned dependencies	2020-11-03 04:12:47 -08:00
James R. Barlow	d22a1b3367	v11.3.2 release notes (2) Since we never tagged it, fix other things.	2020-11-03 02:03:25 -08:00
James R. Barlow	b913e5dfef	ghostscript: don't repeat log in debug Subprocess already does this for us.	2020-11-03 01:45:06 -08:00
James R. Barlow	dd8a5a4c72	Fix log domain names ocrmypdf.subprocess.subprocess.ghostscript -> ocrmypdf.subprocess.ghostscript	2020-11-03 01:44:35 -08:00
James R. Barlow	36e9a54f02	Remove extraneous page rotation This was added in commit `b5ccbfd` but seems to have been ill-advised.	2020-11-03 01:34:28 -08:00
James R. Barlow	3707af3b74	Change pdf.root to pdf.Root	2020-11-03 01:30:31 -08:00
James R. Barlow	ced7ad9164	unpaper: round off DPI	2020-11-03 01:14:57 -08:00
James R. Barlow	54bbbfdeb3	Fix UnboundLocalError when considering ImageMasks for optimization Uncovered by test file in issue 667, although unrelated to that issue.	2020-11-03 01:08:14 -08:00
James R. Barlow	7f73a6ed1e	Some Python 3.9 fixes	2020-11-03 00:45:47 -08:00
James R. Barlow	dce206d3dc	Fix pre-commit for Py3.9	2020-11-03 00:20:25 -08:00
James R. Barlow	9304c856cf	Merge branch 'master' of github.com:jbarlow83/OCRmyPDF	2020-11-02 02:47:36 -08:00
James R. Barlow	e5df98cbdf	v11.3.2 release notes	2020-11-02 02:43:32 -08:00
James R. Barlow	19bf3aeb00	api: improve typing	2020-11-02 02:33:34 -08:00
James R. Barlow	e86be0031c	unpaper: fix process output handling With the ocrmypdf.subprocess wrapper, logging the output here is redundant and loses the page number context.	2020-11-02 01:07:41 -08:00
James R. Barlow	6425977998	unpaper: use pnm instead of png Some users reported problems with PNG recently; try PNM. Fixes #665 Fixes #667	2020-11-02 01:05:56 -08:00
James R. Barlow	d57df2d980	subprocess: support programs that write their messages to stdout	2020-11-02 01:00:59 -08:00
James R. Barlow	664d0c7969	Document configure_debug_logging	2020-11-02 00:59:00 -08:00
James R. Barlow	a354663ee1	Fix typo in API documentation	2020-11-02 00:58:28 -08:00
Graham MilnandGitHub	b21b048ec4	Add macOS brew language support (#615 ) Note `brew` command for installing additional languages on macOS.	2020-10-30 01:09:06 -07:00
James R. Barlow	709c65b41a	v11.3.1 release notes	2020-10-27 23:11:11 -07:00
James R. Barlow	67f99c5bb7	Endorse pdfminer.six 20201018	2020-10-27 23:09:45 -07:00
James R. Barlow	d55e673d9c	Fix warning about --pdfa-image-compression argument at wrong times Closes #663	2020-10-27 23:09:45 -07:00
James R. Barlow	21b90d2d14	Endorse pikepdf 2.x	2020-10-27 23:09:45 -07:00
Edward BettsandGitHub	2def7e3392	Use % for percentage in string format (#643 )	2020-10-27 23:09:14 -07:00
James R. Barlow	b0dcaa7512	v11.3.0 release notes	2020-10-24 03:19:32 -07:00
James R. Barlow	e8285b1d10	Add test to confirm rasterize_pdf_page rotates correct	2020-10-24 03:10:59 -07:00
James R. Barlow	5ba56adb53	Fix page rotation issue (again) Commit `1327ab3` introduced a fix for a regression, which was reported in #581, #634. It appears that the actual cause of this issue was default parameters to rasterize_pdf_page in pluggy not working as expected, causing a default rotation=0 even when a rotation was needed. As such the OCR image was generated with the wrong orientation, causing the initial regression and fix in commit `1327ab3`. Now that the real problem is identified, it's apparent that the logic prior to `1327ab3` was found and we can revert to `1327ab3` since it fixes all known cases including #658. This reverts `1327ab3` except for retaining improves to rotation output.	2020-10-24 02:45:21 -07:00
James R. Barlow	ca735278e0	setup: Version pluggy better	2020-10-24 02:35:41 -07:00
James R. Barlow	b5ccbfdf25	Fix hookspec of rasterize_pdf_page to remove default parameters	2020-10-24 02:35:18 -07:00
James R. Barlow	8c35d6e6e4	Fix debug log messages being suppressed from child processes	2020-10-22 02:20:06 -07:00
James R. Barlow	d1e0c81eda	Ensure worker_pdf is closed after gathering info in a thread This is hacky, uses global state, but it does improve the situation for now.	2020-10-22 00:38:24 -07:00
James R. Barlow	10c8e4f8b4	Only create debug.log when running from command line When used as a library ocrmypdf shouldn't make policy decisions, like where to put a log file. Unsurprisingly, creating it causes problems for library users because we deleted the temporary folder which held the log file and made no effort to move it to a new location. Also update the documentation to better described how an application should handle this. Closes #657	2020-10-20 01:29:36 -07:00
James R. Barlow	6be2242c21	Describe "OCR" step as "Image processing" when --tesseract-timeout=0 Fixes #647	2020-10-08 01:03:42 -07:00
James R. Barlow	204c9d6ae1	Fix inverted colors during JBIG2 optimization on paletted images Fixes #640	2020-10-07 04:08:50 -07:00
James R. Barlow	6eb393590b	v11.2.0 release notes Change v11.1.3 to v11.2.0 since it contains functional changes.	2020-10-06 03:24:31 -07:00
James R. Barlow	07c6654057	v11.1.3 release notes	2020-10-06 03:22:48 -07:00
James R. Barlow	4e15eb8d14	Fix image optimization discarding image masks and soft masks associated with PNGs Fixes #648	2020-10-06 03:20:54 -07:00
James R. Barlow	8b01ab8ad2	Better type checking on ocrmypdf.ocr(plugins=...)	2020-10-05 15:02:34 -07:00
James R. Barlow	e0a522ad50	Document the example plugin	2020-10-05 15:01:44 -07:00
James R. Barlow	a1a8788c5a	Merge branch 'master' of github.com:jbarlow83/OCRmyPDF	2020-09-29 02:46:27 -07:00
James R. Barlow	cccdc178c3	v11.1.2 release notes	2020-09-29 02:46:18 -07:00
James R. Barlow	4eacb3454f	hOCR: write text in correct order Fixes #642	2020-09-29 02:45:11 -07:00
Jimit DholakiaandGitHub	82b8b41e80	docs: Add 'unpaper' optional dependency for Ubuntu 18.04 (#639 )	2020-09-25 11:54:31 -07:00
James R. Barlow	581c5020ab	v11.1.1 release notes	2020-09-25 00:28:38 -07:00
James R. Barlow	3ef8872a1e	pngquant driver: refactor, use streams instead of temporary files	2020-09-25 00:18:02 -07:00
James R. Barlow	28eec73eed	Tighten unpaper-args validation to exclude . and .. Just in case	2020-09-25 00:18:02 -07:00
James R. Barlow	bfe4a5b329	Tidy a log message	2020-09-25 00:17:57 -07:00
James R. Barlow	29097837d6	Release notes typo	2020-09-19 00:49:36 -07:00
James R. Barlow	a40361db3c	Remove unpaper from macOS build Homebrew seems to be having issues with its deps?	2020-09-17 03:38:48 -07:00
James R. Barlow	8b29e3cbab	Merge commit '9a6cd95e5fe2826d40861229aaa0431b76e302e7'	2020-09-17 03:34:35 -07:00
James R. Barlow	b170be120b	v11.1.0 release notes	2020-09-17 03:21:06 -07:00
Suyash BeheraandGitHub	9a6cd95e5f	load zlib before liblept on windows (#633 ) fixes #631	2020-09-17 03:14:42 -07:00
James R. Barlow	d464d3122e	Use img2pdf to create optimized PNG images Fixes #629, #620	2020-09-17 03:11:26 -07:00
James R. Barlow	1327ab37d4	Fix page rotation regression Fixes #634, #581	2020-09-17 02:57:00 -07:00
James R. Barlow	67553fc5c6	Display page numbers in log messages when grafting	2020-09-17 01:20:50 -07:00
James R. Barlow	306a903854	Remove unused function log_page_orientations	2020-09-17 01:20:02 -07:00
James R. Barlow	b93cf51c0f	Disable pikepdf mmap Infrequently we can reproduce this error: terminating with uncaught exception of type std::runtime_error: pybind11_object_dealloc(): Tried to deallocate unregistered instance! The error is probably related to pybind11 issue #2252 and a bunch of other related issues. Until that is resolved in pybind11 and pikepdf we will disable the pikepdf mmap interface.	2020-09-16 23:48:55 -07:00
James R. Barlow	6b994221c6	Remove Python 3.7 from build since homebrew removed it	2020-09-16 23:44:18 -07:00
James R. Barlow	8b5b02e0d8	Expand documentation of filter_page_image	2020-09-14 14:36:17 -07:00
James R. Barlow	624df9bb23	Extend example plugin with example of mono conversion	2020-09-14 14:35:50 -07:00
James R. Barlow	fa06ea3600	v11.0.2 release notes	2020-09-08 02:38:57 -07:00
James R. Barlow	31994258fb	metadata fixup: don't try to update original PDF's metadata with docinfo	2020-09-08 02:35:16 -07:00
James R. Barlow	1f15ecbca5	Add "Postprocessing" message as a hint for long Ghostscript runs	2020-09-08 02:34:10 -07:00
James R. Barlow	bcf5657e5c	Reorganize issue templates	2020-08-26 17:11:52 -07:00
jbarlow83andGitHub	2ae028bf38	Update issue templates	2020-08-26 17:03:09 -07:00
James R. Barlow	b51a5887e5	v11.0.1 release notes	2020-08-17 23:25:31 -07:00
James R. Barlow	fc523e837c	Clarify that the GPL-3 portion of pdfa.py was removed Removal was in `8c90f7c97`. pdfa.py now has no special licensing and falls unders the "Files: *" clause of debian/copyright.	2020-08-17 23:23:31 -07:00
James R. Barlow	caeba76a61	Approve img2pdf 0.4 as it passes tests	2020-08-14 01:34:04 -07:00
James R. Barlow	cd35216f21	setup: blacklist pdfminer.six 20200720 NotAllowedError is going to removed https://github.com/pdfminer/pdfminer.six/commit/99f0c09869370d74eb6a27234284b894c33414f4	2020-08-12 13:10:08 -07:00
James R. Barlow	e6a7b58863	Merge branch 'de-gpl'	2020-08-12 12:20:38 -07:00
James R. Barlow	56184a762f	Issue template:Give stronger hints about sample input files	2020-08-12 12:12:37 -07:00
James R. Barlow	07ab98f5af	docs: mention that Ghostscript PDF/A can swallow hyperlinks Addresses #605	2020-08-12 12:12:00 -07:00
James R. Barlow	04fb1892b4	Don't ask for sample files anymore	2020-08-12 11:40:42 -07:00
James R. Barlow	173ce2f215	v10.3.3 release notes	2020-08-07 02:23:21 -07:00
James R. Barlow	9b641055e1	Fix KeyError: 'dpi' when using --threshold on image to PDF Fixes #607	2020-08-07 02:21:02 -07:00
James R. Barlow	4fa28d7e74	v10.3.2 release notes	2020-08-05 01:36:56 -07:00
James R. Barlow	bed74501fc	Fix test breakage in validation Broken in commit 4cc0dc	2020-08-05 01:35:26 -07:00
James R. Barlow	8c90f7c972	Replace GPLv3-derived PDF/A template with PostScript generator	2020-08-05 01:30:45 -07:00
James R. Barlow	aa0ec40102	Change license of all GPLv3 files to MPL-2.0 https://github.com/jbarlow83/OCRmyPDF/issues/600	2020-08-05 00:44:42 -07:00
James R. Barlow	12c567ee10	Copyright cleanup: relicense example_plugin.py The author is relicensing this file to MIT.	2020-08-05 00:15:33 -07:00
James R. Barlow	d39778ce3a	Clarify copyright status of misc/batch.py, synology.py At the time these files were contributed there was no discussion of the license that the authors wanted to use, but the project was MIT licensed at the time. As such, these files deemed to be MIT licensed. https://github.com/jbarlow83/OCRmyPDF/issues/600	2020-08-05 00:12:44 -07:00
James R. Barlow	e824cdbc4e	Change license of misc/watcher.py to MIT The authors of this file all agreed to relicense it under the MIT license. https://github.com/jbarlow83/OCRmyPDF/issues/600	2020-08-04 23:57:41 -07:00
James R. Barlow	1d91c09963	Clarify license status of misc/completion/* files These files were contributed when the project license was GPLv3. On discussion, all known authors of these files agreed to place them under MIT license. See https://github.com/jbarlow83/OCRmyPDF/issues/600	2020-08-04 23:53:56 -07:00
James R. Barlow	e821ca46d5	Approve pdfminer.six 20200726	2020-08-03 16:04:16 -07:00
James R. Barlow	a29e4952fb	Document use of mmap	2020-08-03 16:03:54 -07:00
James R. Barlow	4cc0dc6b4a	Additional size increase reasons	2020-08-03 16:03:29 -07:00
James R. Barlow	7263702de9	Remove gs.py (spoofers entirely removed) and update copyright	2020-07-29 16:31:47 -07:00
James R. Barlow	0287d91874	v10.3.1 release notes	2020-07-26 21:53:08 -07:00
James R. Barlow	436af55050	Approve pdfminer.six 20200720	2020-07-26 21:51:49 -07:00
James R. Barlow	d6128e6937	Fix support for older versions of pdfminer.six (boxes_flow error)	2020-07-26 21:51:25 -07:00
James R. Barlow	642437e804	Merge branch 'master' of github.com:jbarlow83/OCRmyPDF	2020-07-22 00:34:33 -07:00
James R. Barlow	4ce802fdb2	v10.3.0 release notes	2020-07-22 00:34:27 -07:00
James R. Barlow	a672422b0b	Enable pikepdf mmap in other contexts	2020-07-22 00:20:07 -07:00
James R. Barlow	addc2cbad0	Enable pikepdf mmap and set up signal handlers	2020-07-22 00:19:50 -07:00
James R. Barlow	5f45f77b4e	docs: plugins update	2020-07-21 23:53:30 -07:00
James R. Barlow	93f9bffb37	Merge branch 'feature/leptonica-179'	2020-07-20 21:23:53 -07:00
James R. Barlow	44149ad319	Disable test_error_trap for Leptonica < 1.79 Old error trap seems unreliable in the first place so difficult to set up a test.	2020-07-20 21:12:00 -07:00
fcatusandGitHub	d80d963cea	pdfinfo: Replace list comp with gen expr'n	2020-07-20 02:21:58 -07:00
James R. Barlow	4da33b8050	Update debian/copyright from Debian, with fixes	2020-07-19 03:50:43 -07:00
James R. Barlow	5cbbff8472	For Leptonica 1.79+ use leptSetStderrHandler Lock free and considerably less dangerous to stderr messages.	2020-07-19 03:40:33 -07:00
James R. Barlow	fa6e47c277	Merge branch 'feature/optimize-cleanup'	2020-07-19 01:53:11 -07:00
James R. Barlow	4ea9cffebd	Add locking to Leptonica error trap To protect another thread from interfering with our redirection of stderr.	2020-07-19 01:51:58 -07:00
James R. Barlow	ae68edefc5	pipelines: fix Python 3.7/3.8 on macOS	2020-07-19 01:51:58 -07:00
James R. Barlow	1558e068f1	docs: explain firstresult hook behavior	2020-07-16 00:01:59 -07:00
James R. Barlow	d2a9c413f8	docs: install notes for ARM64	2020-07-14 01:25:16 -07:00
James R. Barlow	a510b21b20	optimize: add typing for Xref, remove fspath()'s	2020-07-09 14:06:41 -07:00
James R. Barlow	e33ba07aa4	Update pre-commit settings	2020-07-08 23:45:53 -07:00
James R. Barlow	373f27832b	optimize: improve typing of xref_exts	2020-07-07 22:41:29 -07:00
James R. Barlow	b20a6e4c5d	optimize: add type hints	2020-07-07 22:18:50 -07:00
James R. Barlow	49734d5456	optimize: fix incorrect to prevent re-optimizing JBIG2s	2020-07-07 21:52:11 -07:00
James R. Barlow	26a415c5dd	docs: Note usage of OCR_JSON_SETTINGS for watcher	2020-07-07 21:26:57 -07:00
James R. Barlow	60be64a5f1	Fix debug.log missing pageno handler	2020-07-04 03:59:38 -07:00
James R. Barlow	190294634c	docs: edit plugins	2020-07-03 16:16:01 -07:00
James R. Barlow	1722cb579d	v10.2.1 release notes	2020-07-01 03:26:57 -07:00
James R. Barlow	dc42beb6a8	More typing improvements Typing fixes bugs.	2020-06-30 15:02:30 -07:00
James R. Barlow	378f543619	TextPositionTracker: set boxes_flow=None We don't care about the order of lines in our analysis, and this is an expensive calculation in pdfminer.	2020-06-30 04:20:58 -07:00
James R. Barlow	62924ee280	Improve API documentation	2020-06-30 04:20:14 -07:00
James R. Barlow	86a73191b0	Plugin manager: accept Path(plugin)	2020-06-30 04:17:30 -07:00
James R. Barlow	86875997b8	Fix more mypy errors	2020-06-29 02:17:14 -07:00
James R. Barlow	b939584c7a	quality: fixing typing issues	2020-06-29 01:45:45 -07:00
James R. Barlow	bbd174071d	readme: markdown cleanup	2020-06-29 01:45:27 -07:00
James R. Barlow	e5b6fe1317	pyproject.toml: weird line wrapping?	2020-06-29 01:45:12 -07:00
James R. Barlow	f15d9049eb	install: add Mageia Closes #586. Thanks to @yannick56	2020-06-26 23:28:26 -07:00
James R. Barlow	7630c93e5b	install: drop Ubuntu 14.04 steps Bit rot must have set in.	2020-06-26 23:27:42 -07:00
James R. Barlow	638d68aa8a	docs: move Windows ahead of FreeBSD	2020-06-26 22:49:34 -07:00
James R. Barlow	a92dde058a	docs: promote one liner installs, reorg Windows	2020-06-26 22:47:44 -07:00
James R. Barlow	580f2ebb4b	Python 3.9beta is now known to work (Fedora)	2020-06-26 00:06:58 -07:00
James R. Barlow	01cae7a584	docs: Update Fedora versions	2020-06-23 02:08:24 -07:00