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mirror of https://github.com/qpdf/qpdf.git synced 2024-11-16 17:45:09 +00:00
Commit Graph

19 Commits

Author SHA1 Message Date
Jay Berkenbilt
4f3b89991b placeFormXObject: allow control of shrink/expand (fixes #409) 2020-04-03 21:39:17 -04:00
Jay Berkenbilt
5806e5c60c QPDFPageObjectHelper::placeFormXObject: use std::string const& (fixes #374) 2020-04-03 12:17:57 -04:00
Jay Berkenbilt
dac65a21fb Look in form XObjects when removing unreferenced resources (fixes #373)
If a page contains a form XObject, also filter the form XObject and
remove its unreferenced resources.
2020-03-31 17:39:20 -04:00
Jay Berkenbilt
278710fbe8 Refactor QPDFPageObjectHelper::removeUnreferencedResources()
Refactor removeUnreferencedResources to prepare for filtering form
XObjects.
2020-03-31 17:39:20 -04:00
Jay Berkenbilt
bbc2f8ffae Bug fix: handle ColorSpace lookup for inline images (fixes #392)
If the value of /CS in the inline image dictionary was is key in the
page's /Resource -> /ColorSpace dictionary, properly resolve it by
referencing the proper colorspace, and not just the name, in the
external image dictionary.
2020-01-26 15:29:10 -05:00
Jay Berkenbilt
5508f74603 Allow /P in encryption dictionary to be positive (fixes #382)
Even though this is disallowed by the spec, files like this have been
encountered in the wild.
2019-11-09 12:33:15 -05:00
Jay Berkenbilt
d71f05ca07 Fix sign and conversion warnings (major)
This makes all integer type conversions that have potential data loss
explicit with calls that do range checks and raise an exception. After
this commit, qpdf builds with no warnings when -Wsign-conversion
-Wconversion is used with gcc or clang or when -W3 -Wd4800 is used
with MSVC. This significantly reduces the likelihood of potential
crashes from bogus integer values.

There are some parts of the code that take int when they should take
size_t or an offset. Such places would make qpdf not support files
with more than 2^31 of something that usually wouldn't be so large. In
the event that such a file shows up and is valid, at least qpdf would
raise an error in the right spot so the issue could be legitimately
addressed rather than failing in some weird way because of a silent
overflow condition.
2019-06-21 13:17:21 -04:00
Jay Berkenbilt
fec5bb124c Spell check 2019-01-31 21:41:29 -05:00
Jay Berkenbilt
eb49e07c0a Make inline image token exactly contain the image data
Do not include the trailing EI, and handle cases where EI is not
preceded by a delimiter. Such cases have been seen in the wild.
2019-01-31 20:28:44 -05:00
Jay Berkenbilt
5211bcb5ea Externalize inline images (fixes #278) 2019-01-31 10:38:13 -05:00
Jay Berkenbilt
623f5b664e Convert pages to form XObjects
Support conversion of pages to form XObjects and placement of form
XObjects on pages.
2019-01-27 07:50:30 -05:00
Jay Berkenbilt
009767d97a Handle inheritable page attributes
Add getAttribute for handling inheritable page attributes, and fix
getPageImages and annotation flattening code to use it.
2019-01-25 22:30:05 -05:00
Jay Berkenbilt
5cfcd4f361 Additional checks for unreferenced resources
Explicitly abandon removal of unreferenced resources if there are any
lexical errors in the page's contents. This case always generated a
warning, but it now also prevents removal of unreferenced resources,
this strongly decreasing the likelihood of data loss.
2019-01-17 11:43:56 -05:00
Jay Berkenbilt
4bc434000c Copy subdictionaries when removing resources (fixes #276)
When removing unreferenced resources, the code was copying the overall
resource dictionaries but not the subdictionaries being modified. This
was a "typo" in the code -- the comment clearly stated the need to do
this, but the code replaced the dictionary with itself rather than
with a shallow copy of itself.
2019-01-17 09:40:05 -05:00
Jay Berkenbilt
654c0e8caf Allow adding the same page more than once in --pages (fixes #272) 2019-01-12 10:01:47 -05:00
Jay Berkenbilt
c71dc6888c Don't prune resource dictionaries on errors or by request
If we are unable to filter a page's content streams, don't attempt to
remove objects from the page's resource dictionary. Also provide a
command line option to suppress resource removal in case we ever need
this as a workaround for some bug or broken PDF files.
2018-06-22 10:45:31 -04:00
Jay Berkenbilt
6c89d4b35b When splitting files, remove unreferenced objects (fixes #203) 2018-06-21 21:03:30 -04:00
Jay Berkenbilt
0b05111db8 Implement helper class for interactive forms 2018-06-21 15:57:13 -04:00
Jay Berkenbilt
2e7ee23bf6 Add QPDFPageDocumentHelper and QPDFPageObjectHelper
This is the beginning of higher-level API support using helper
classes. The goal is to be able to add more helpers without continuing
to pollute QPDF's and QPDFObjectHandle's public interfaces.
2018-06-21 15:57:13 -04:00