mirror of
https://github.com/qpdf/qpdf.git
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Incorporate editorial changes from m-holger
This commit is contained in:
Jay Berkenbilt
parent
7dd5f31230
commit
f3d68aa5a0
@ -159,6 +159,9 @@ class Main:
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if long_text == '':
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raise Exception(f'missing long text for {topic}')
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long_text += '\n'
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if topic != '--help':
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# Help for --help itself has --help=... not
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# referring to specific options.
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for i in re.finditer(r'--help=([^\.\s]+)', long_text):
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self.referenced_topics.add(i.group(1))
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return True
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6
job.sums
6
job.sums
@ -1,5 +1,5 @@
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# Generated by generate_auto_job
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generate_auto_job 8efd9e2fa9d517ceb80404f1779f37de194df32a422f0beca30a2b47cc64d816
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generate_auto_job bc2f0e8cecebe8b11950cf37714a646fd5a1d294839b748d1c499353226dd642
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include/qpdf/auto_job_c_att.hh 7ad43bb374c1370ef32ebdcdcb7b73a61d281f7f4e3f12755585872ab30fb60e
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include/qpdf/auto_job_c_copy_att.hh 32275d03cdc69b703dd7e02ba0bbe15756e714e9ad185484773a6178dc09e1ee
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include/qpdf/auto_job_c_enc.hh 72e138c7b96ed5aacdce78c1dec04b1c20d361faec4f8faf52f64c1d6be99265
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@ -8,8 +8,8 @@ include/qpdf/auto_job_c_pages.hh 931840b329a36ca0e41401190e04537b47f2867671a6643
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include/qpdf/auto_job_c_uo.hh 0585b7de459fa479d9e51a45fa92de0ff6dee748efc9ec1cedd0dde6cee1ad50
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job.yml 1590fd16fd17ed40db9aa56b6713c844cfd61b3a6d0441a3ccd122b7371c68e9
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libqpdf/qpdf/auto_job_decl.hh 9f79396ec459f191be4c5fe34cf88c265cf47355a1a945fa39169d1c94cf04f6
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libqpdf/qpdf/auto_job_help.hh 524e8123152df496794954d16a556d5fee9c76ec6a7f5a6b8f9d2b59c1719e10
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libqpdf/qpdf/auto_job_help.hh 05cddfb81ed7fb58a8249b912890e560cb76bd51389d64eae6c662ca552c87d9
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libqpdf/qpdf/auto_job_init.hh 3b6323189480a7d782563c9d2b5bc29b8dcd19c6dcc89840b207e38cb503d3f1
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libqpdf/qpdf/auto_job_schema.hh 1c3b4b5488270f8d200ed345573e3a241f15baff6fb7e97ec3d044103b2546d9
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manual/_ext/qpdf.py e9ac9d6c70642a3d29281ee5ad92ae2422dee8be9306fb8a0bc9dba0ed5e28f3
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manual/cli.rst 06785f88a28703da0f6d81b6983ae6c09aa1dd8cd958fb5058d56177da431c6c
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manual/cli.rst 9aecd2905844fbda5cd528afd7fedef693ac0958bcb20e235f1c8e10a1896abe
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@ -54,8 +54,11 @@ ap.addOptionHelp("--completion-zsh", "completion", "enable zsh completion", R"(O
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ap.addHelpTopic("help", "information about qpdf", R"(Help options provide some information about qpdf itself. Help
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options are only valid as the first and only command-line argument.
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)");
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ap.addOptionHelp("--help", "help", "provide help", R"(Display help information. Run qpdf --help for information about
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how to get help on various topics.
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ap.addOptionHelp("--help", "help", "provide help", R"(--help[=--option|topic]
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--help: provide general information and a list of topics
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--help=--option: provide help on a specific option
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--help=topic: provide help on a topic
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)");
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ap.addOptionHelp("--version", "help", "show qpdf version", R"(Display the version of qpdf.
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)");
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@ -70,7 +73,7 @@ directly related to the operation it is performing.
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ap.addOptionHelp("--password", "general", "specify password", R"(--password=password
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Specify a password for an encrypted, password-protected file.
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Not needed for encrypted files with no password.
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Not needed for encrypted files without a password.
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)");
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ap.addOptionHelp("--password-file", "general", "read password from a file", R"(--password-file=filename
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@ -119,9 +122,9 @@ ap.addOptionHelp("--password-is-hex-key", "advanced-control", "provide hex-encod
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string rather than supplying a password. This is an expert
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option.
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)");
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ap.addOptionHelp("--suppress-password-recovery", "advanced-control", "don't try different password encodings", R"(Suppress qpdf's behavior of attempting different encodings of a
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password that contains non-ASCII Unicode characters if the first
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attempt doesn't succeed.
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ap.addOptionHelp("--suppress-password-recovery", "advanced-control", "don't try different password encodings", R"(Suppress qpdf's usual behavior of attempting different encodings
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of a password that contains non-ASCII Unicode characters if the
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first attempt doesn't succeed.
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)");
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ap.addOptionHelp("--password-mode", "advanced-control", "tweak how qpdf encodes passwords", R"(--password-mode=mode
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@ -159,12 +162,12 @@ If the file named in --copy-encryption requires a password, use
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this option to supply the password.
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)");
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ap.addOptionHelp("--qdf", "transformation", "enable viewing PDF code in a text editor", R"(Create a PDF file suitable for viewing in a text editor and even
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editing. This is to edit the PDF code, not the page contents.
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editing. This is for editing the PDF code, not the page contents.
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All streams that can be uncompressed are uncompressed, and
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content streams are normalized, among other changes. The
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companion tool "fix-qdf" can be used to repair hand-edited QDF
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files. QDF is a feature specific to the qpdf tool. There is a
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chapter about it in the manual.
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files. QDF is a feature specific to the qpdf tool. Please see
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the "QDF Mode" chapter in the manual.
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)");
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ap.addOptionHelp("--no-original-object-ids", "transformation", "omit original object IDs in qdf", R"(Omit comments in a QDF file indicating the object ID an object
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had in the original file.
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@ -256,8 +259,11 @@ default is 1,024. Use 0 for no minimum.
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)");
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ap.addOptionHelp("--min-version", "transformation", "set minimum PDF version", R"(--min-version=version
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Force the PDF version of the output to be at least the
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specified version.
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Force the PDF version of the output to be at least the specified
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version. The version number format is
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"major.minor[.extension-level]", which sets the version header
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to "major.minor" and the extension level, if specified, to
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"extension-level".
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)");
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ap.addOptionHelp("--force-version", "transformation", "set output PDF version", R"(--force-version=version
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189
manual/cli.rst
189
manual/cli.rst
@ -294,14 +294,17 @@ are only valid as the first and only command-line argument.
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Related Options
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~~~~~~~~~~~~~~~
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.. qpdf:option:: --help
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.. qpdf:option:: --help[=--option|topic]
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.. help: provide help
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Display help information. Run qpdf --help for information about
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how to get help on various topics.
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--help: provide general information and a list of topics
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--help=--option: provide help on a specific option
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--help=topic: provide help on a topic
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Display command-line invocation help.
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Display command-line invocation help. Use :samp:`--help={--option}`
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for help on a specific option and :samp:`--help={topic}` for help
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on a help topic and also provides a list of available help topics.
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.. qpdf:option:: --version
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@ -357,7 +360,7 @@ Related Options
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.. help: specify password
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Specify a password for an encrypted, password-protected file.
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Not needed for encrypted files with no password.
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Not needed for encrypted files without a password.
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Specifies a password for accessing encrypted, password-protected
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files. To read the password from a file or standard input, you can
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@ -385,7 +388,8 @@ Related Options
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password for accessing encrypted files. :samp:`{filename}` may be
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``-`` to read the password from standard input, but if you do that
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the password is echoed and there is no prompt, so use ``-`` with
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caution.
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caution. Note that leading and trailing spaces are not stripped
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from the password.
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.. qpdf:option:: --verbose
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@ -407,9 +411,9 @@ Related Options
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Indicate progress when writing files.
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Indicate progress while writing output files. Progress indication
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does not start until writing starts, so if complicated
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transformations are being applied before the write process begins,
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there may be a delay before progress indicators are seen.
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does not start until writing starts, so there may be a delay before
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progress indicators are seen if complicated transformations are
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being applied before the write process begins.
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.. qpdf:option:: --no-warn
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@ -435,23 +439,25 @@ Related Options
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information, such as the page contents. Does not use the file's
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name or attributes or the current time.
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Generate of a secure, random document ID using deterministic
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values. This prevents use of timestamp and output file name
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information in the ID generation. Instead, at some slight
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additional runtime cost, the ID field is generated to include a
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digest of the significant parts of the content of the output PDF
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file. This means that a given qpdf operation should generate the
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same ID each time it is run, which can be useful when caching
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results or for generation of some test data. Use of this flag is
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not compatible with creation of encrypted files.
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Note that there is *no guarantee* that different versions of qpdf
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will generate the same deterministic ID given the same generation
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code and input. While care is taken to avoid gratuitous changes,
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new versions of qpdf may include changes that affect the output.
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This option can be useful for testing. See also
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Generate a secure, random document ID using deterministic values.
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This prevents use of timestamp and output file name information in
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the ID generation. Instead, at some slight additional runtime cost,
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the ID field is generated to include a digest of the significant
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parts of the content of the output PDF file. This means that a
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given qpdf operation should generate the same ID each time it is
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run, which can be useful when caching results or for generation of
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some test data. Use of this flag is not compatible with creation of
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encrypted files. This option can be useful for testing. See also
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:qpdf:ref:`--static-id`.
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While qpdf will generate the same deterministic ID given the same
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output PDF, there is no guarantee that different versions of qpdf
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will generate exactly the same PDF output for the same input and
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options. While care is taken to avoid gratuitous changes to qpdf's
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PDF generation, new versions of qpdf may include changes or bug
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fixes that cause slightly different PDF code to be generated. Such
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changes are noted in the release notes.
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.. qpdf:option:: --allow-weak-crypto
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.. help: allow insecure cryptographic algorithms
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@ -561,9 +567,9 @@ Related Options
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.. help: don't try different password encodings
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Suppress qpdf's behavior of attempting different encodings of a
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password that contains non-ASCII Unicode characters if the first
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attempt doesn't succeed.
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Suppress qpdf's usual behavior of attempting different encodings
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of a password that contains non-ASCII Unicode characters if the
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first attempt doesn't succeed.
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Ordinarily, qpdf attempts to automatically compensate for passwords
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encoded with the wrong character encoding. This option suppresses
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@ -666,8 +672,8 @@ The options discussed in this section tell qpdf to apply
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transformations that change the structure of a PDF file without
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changing its content. Examples include creating linearized
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(web-optimized) files, adding or removing encryption, restructuring
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files for older viewers, and rewriting files for human inspection,
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among others. See also :ref:`modification-options`.
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files for older viewers, and rewriting files for human inspection. See
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also :ref:`modification-options`.
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Related Options
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~~~~~~~~~~~~~~~
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@ -692,10 +698,7 @@ Related Options
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Run qpdf --help=encryption for details.
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This flag starts encryption options, used to create encrypted
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files.
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Please see :ref:`encryption-options` for details about creating
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encrypted files.
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files. Please see :ref:`encryption-options` for details.
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.. qpdf:option:: --decrypt
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@ -720,19 +723,19 @@ Related Options
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preserving the input file's encryption. Use --encryption-file-password
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to specify the encryption file's password.
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Copy encryption parameters, including the user password, the owner
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password, and all security restrictions, from the specified file
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instead of preserving encryption details from the input file. This
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works even if only one of the user password or owner password is
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known. If the encryption file requires a password, use the
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:qpdf:ref:`--encryption-file-password` option to set it. Note that
|
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copying the encryption parameters from a file also copies the first
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half of ``/ID`` from the file since this is part of the encryption
|
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parameters. This option can be useful if you need to decrypt a file
|
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to make manual changes to it or to change it outside of qpdf, and
|
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then want to restore the original encryption on the file
|
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without having to manual specify all the individual settings. See
|
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also :qpdf:ref:`--decrypt`.
|
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Copy all encryption parameters, including the user password, the
|
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owner password, and all security restrictions, from the specified
|
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file instead of preserving the encryption details from the input
|
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file. This works even if only one of the user password or owner
|
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password is known. If the encryption file requires a password, use
|
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the :qpdf:ref:`--encryption-file-password` option to set it. Note
|
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that copying the encryption parameters from a file also copies the
|
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first half of ``/ID`` from the file since this is part of the
|
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encryption parameters. This option can be useful if you need to
|
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decrypt a file to make manual changes to it or to change it outside
|
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of qpdf, and then want to restore the original encryption on the
|
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file without having to manual specify all the individual settings.
|
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See also :qpdf:ref:`--decrypt`.
|
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|
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.. qpdf:option:: --encryption-file-password=password
|
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|
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@ -752,12 +755,12 @@ Related Options
|
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.. help: enable viewing PDF code in a text editor
|
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|
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Create a PDF file suitable for viewing in a text editor and even
|
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editing. This is to edit the PDF code, not the page contents.
|
||||
editing. This is for editing the PDF code, not the page contents.
|
||||
All streams that can be uncompressed are uncompressed, and
|
||||
content streams are normalized, among other changes. The
|
||||
companion tool "fix-qdf" can be used to repair hand-edited QDF
|
||||
files. QDF is a feature specific to the qpdf tool. There is a
|
||||
chapter about it in the manual.
|
||||
files. QDF is a feature specific to the qpdf tool. Please see
|
||||
the "QDF Mode" chapter in the manual.
|
||||
|
||||
Create a PDF file suitable for viewing and editing in a text
|
||||
editor. This is to edit the PDF code, not the page contents. To
|
||||
@ -766,13 +769,13 @@ Related Options
|
||||
and content streams are normalized, among other changes. The
|
||||
companion tool :command:`fix-qdf` can be used to repair hand-edited
|
||||
QDF files. QDF is a feature specific to the qpdf tool. For
|
||||
additional information about QDF mode, see :ref:`qdf`. Note that
|
||||
additional information, see :ref:`qdf`. Note that
|
||||
:qpdf:ref:`--linearize` disables QDF mode.
|
||||
|
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QDF mode has full support for object streams, but sometimes it's
|
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easier to locate a specific object if object streams are disabled.
|
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When trying to understand some PDF construct by inspecting an
|
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existing file, it can often be useful to combine :samp:`--qdf` with
|
||||
existing file, it can be useful to combine :samp:`--qdf` with
|
||||
:samp:`--object-streams=disable`.
|
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|
||||
This flag changes some of the defaults of other options: stream
|
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@ -788,10 +791,10 @@ Related Options
|
||||
|
||||
When normalizing content, if qpdf runs into any lexical errors, it
|
||||
will print a warning indicating that content may be damaged. If you
|
||||
want to create QDF files without content normalization, can you run
|
||||
with :samp:`--qdf --normalize-content=n`. You can also create a
|
||||
non-QDF file with uncompressed streams using
|
||||
:samp:`--stream-data=uncompress`. These will both uncompress all
|
||||
want to create QDF files without content normalization, specify
|
||||
:samp:`--qdf --normalize-content=n`. You can also create a non-QDF
|
||||
file with uncompressed streams using
|
||||
:samp:`--stream-data=uncompress`. Either option will uncompress all
|
||||
the streams but will not attempt to normalize content. Please note
|
||||
that if you are using content normalization or QDF mode for the
|
||||
purpose of manually inspecting files, you don't have to care about
|
||||
@ -872,15 +875,15 @@ Related Options
|
||||
These are left untouched regardless of the option. Future versions
|
||||
of qpdf may support additional filters.
|
||||
|
||||
Because the default value is ``generalized``, by default, when a stream
|
||||
is encoded using non-lossy filters that qpdf understands and is not
|
||||
already compressed using a good compression scheme, qpdf will
|
||||
uncompress the stream. If ``--compress-streams=y`` is also in
|
||||
effect, which is the default (see :qpdf:ref:`--compress-streams`),
|
||||
the overall effect is that qpdf will recompress streams with
|
||||
generalized filters using flate compression, effectively
|
||||
eliminating LZW and ASCII-based filters. This is usually desirable
|
||||
behavior but can be disabled with ``--decode-level=none``.
|
||||
Because the default value is ``generalized``, qpdf's default
|
||||
behavior is to uncompress any stream that is encoded using
|
||||
non-lossy filters that qpdf understands. If
|
||||
``--compress-streams=y`` is also in effect, which is the default
|
||||
(see :qpdf:ref:`--compress-streams`), the overall effect is that
|
||||
qpdf will recompress streams with generalized filters using flate
|
||||
compression, effectively eliminating LZW and ASCII-based filters.
|
||||
This is usually desirable behavior but can be disabled with
|
||||
``--decode-level=none``.
|
||||
|
||||
As a special case, streams already compressed with ``/FlateDecode``
|
||||
are not uncompressed and recompressed. You can change this behavior
|
||||
@ -956,7 +959,8 @@ Related Options
|
||||
already compressed streams, you should also specify
|
||||
:qpdf:ref:`--recompress-flate`. If your goal is to shrink the size
|
||||
of PDF files, you should also use
|
||||
:samp:`--object-streams=generate`.
|
||||
:samp:`--object-streams=generate`. If you omit this option, qpdf
|
||||
defers to the compression library's default behavior.
|
||||
|
||||
.. qpdf:option:: --normalize-content=[yn]
|
||||
|
||||
@ -1002,10 +1006,10 @@ Related Options
|
||||
- create object streams, and compress objects when possible
|
||||
|
||||
Object streams are PDF streams that contain other objects. Putting
|
||||
objects in object streams allows the PDF objects themselves to be
|
||||
objects into object streams allows the PDF objects themselves to be
|
||||
compressed, which can result in much smaller PDF files. Combining
|
||||
this option with :qpdf:ref:`--compression-level` and
|
||||
:qpdf:ref:`--recompress-flate` can often result in creation of
|
||||
:qpdf:ref:`--recompress-flate` can often result in the creation of
|
||||
smaller PDF files.
|
||||
|
||||
Object streams, also known as compressed objects, were introduced
|
||||
@ -1014,7 +1018,7 @@ Related Options
|
||||
used to transform files with object streams into files without object
|
||||
streams or vice versa.
|
||||
|
||||
In :samp:`preserve` mode, the relationship to objects and the
|
||||
In :samp:`preserve` mode, the relationship between objects and the
|
||||
streams that contain them is preserved from the original file. If
|
||||
the file has no object streams, qpdf will not add any. In
|
||||
:samp:`disable` mode, all objects are written as regular,
|
||||
@ -1040,7 +1044,7 @@ Related Options
|
||||
objects.
|
||||
|
||||
This flag is ignored for linearized files and has the effect of
|
||||
causing objects in the new file to be written in order by object ID
|
||||
causing objects in the new file to be written ordered by object ID
|
||||
from the original file. This does not mean that object numbers will
|
||||
be the same since qpdf may create stream lengths as direct or
|
||||
indirect differently from the original file, and the original file
|
||||
@ -1157,8 +1161,11 @@ Related Options
|
||||
|
||||
.. help: set minimum PDF version
|
||||
|
||||
Force the PDF version of the output to be at least the
|
||||
specified version.
|
||||
Force the PDF version of the output to be at least the specified
|
||||
version. The version number format is
|
||||
"major.minor[.extension-level]", which sets the version header
|
||||
to "major.minor" and the extension level, if specified, to
|
||||
"extension-level".
|
||||
|
||||
Force the PDF version of the output file to be at least
|
||||
:samp:`{version}`. In other words, if the input file has a lower
|
||||
@ -1169,12 +1176,13 @@ Related Options
|
||||
when adding features that require newer PDF readers.
|
||||
|
||||
The version number may be expressed in the form
|
||||
:samp:`{major.minor.extension-level}`, in which case the version is
|
||||
interpreted as :samp:`{major.minor}` at extension level
|
||||
:samp:`{extension-level}`. For example, version ``1.7.8``
|
||||
represents version 1.7 at extension level 8. Note that minimal
|
||||
syntax checking is done on the command line. :command:`qpdf` does
|
||||
not check whether the specified version is actually required.
|
||||
:samp:`{major}.{minor}[.{extension-level}]`. If
|
||||
:samp:`.{extension-level}`, is given, version is interpreted as
|
||||
:samp:`{major.minor}` at extension level :samp:`{extension-level}`.
|
||||
For example, version ``1.7.8`` represents version 1.7 at extension
|
||||
level 8. Note that minimal syntax checking is done on the command
|
||||
line. :command:`qpdf` does not check whether the specified version
|
||||
is actually required.
|
||||
|
||||
.. qpdf:option:: --force-version=version
|
||||
|
||||
@ -1192,22 +1200,22 @@ Related Options
|
||||
version to be lower than that of the input file will cause qpdf to
|
||||
disable certain features of the document. Specifically, 256-bit
|
||||
keys are disabled if the version is less than 1.7 with extension
|
||||
level 8 (except R5 is disabled if less than 1.7 with extension
|
||||
level 3), AES encryption is disabled if the version is less than
|
||||
1.6, cleartext metadata and object streams are disabled if less
|
||||
than 1.5, 128-bit encryption keys are disabled if less than 1.4,
|
||||
and all encryption is disabled if less than 1.3. Even with these
|
||||
precautions, qpdf won't be able to do things like eliminate use of
|
||||
newer image compression schemes, transparency groups, or other
|
||||
features that may have been added in more recent versions of PDF.
|
||||
level 8 (except the deprecated, unsupported "R5" format is allowed
|
||||
with extension levels 3 through 7), AES encryption is disabled if
|
||||
the version is less than 1.6, cleartext metadata and object streams
|
||||
are disabled if less than 1.5, 128-bit encryption keys are disabled
|
||||
if less than 1.4, and all encryption is disabled if less than 1.3.
|
||||
Even with these precautions, qpdf won't be able to do things like
|
||||
eliminate use of newer image compression schemes, transparency
|
||||
groups, or other features that may have been added in more recent
|
||||
versions of PDF.
|
||||
|
||||
As a general rule, with the exception of big structural things like
|
||||
the use of object streams or AES encryption, PDF viewers are
|
||||
supposed to ignore features in files that they don't support from
|
||||
newer versions. This means that forcing the version to a lower
|
||||
version may make it possible to open your PDF file with an older
|
||||
version, though bear in mind that some of the original document's
|
||||
functionality may be lost.
|
||||
supposed to ignore features they don't support. This means that
|
||||
forcing the version to a lower version may make it possible to open
|
||||
your PDF file with an older version, though bear in mind that some
|
||||
of the original document's functionality may be lost.
|
||||
|
||||
.. _page-ranges:
|
||||
|
||||
@ -1780,7 +1788,6 @@ encryption from the file entirely.
|
||||
Here is a summary of encryption options. Details are provided in the
|
||||
help for each option.
|
||||
|
||||
|
||||
.. list-table:: Options for 40-bit Encryption Only
|
||||
:widths: 30 70
|
||||
:header-rows: 0
|
||||
|
||||
@ -3,6 +3,8 @@
|
||||
QDF Mode
|
||||
========
|
||||
|
||||
.. Help text for --qdf refers to the name of this chapter.
|
||||
|
||||
In QDF mode, qpdf creates PDF files in what we call *QDF
|
||||
form*. A PDF file in QDF form, sometimes called a QDF
|
||||
file, is a completely valid PDF file that has ``%QDF-1.0`` as its third
|
||||
|
||||
Loading…
Reference in New Issue
Block a user