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Make explicit that copyForeignObject can be used on page objects and will copy them properly but not update the pages tree.
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When linearizing a file or getting the list of all pages in a file, detect if the pages tree contains a duplicated page object and, if so, shallow copy it. This makes it possible to have a one to one mapping of page positions to page objects.
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Download external libraries from an isolated branch in github to avoid dependencies on external download locations, which cause sporadic CI build failures.
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Support conversion of pages to form XObjects and placement of form XObjects on pages.
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Add getAttribute for handling inheritable page attributes, and fix getPageImages and annotation flattening code to use it.
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If we end up using our fallback font size when generating appearances for text fields, reflect that in the Tf operator used in the appearance stream.
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When generating appearance streams for variable text annotations, properly handle the cases of there being no appearance dictionary, no appearance stream, or an appearance stream with no BMC..EMC marker.
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With the exception of form field annotations when /NeedAppearances is true, remove annotations that don't have appearance streams when flattening. There is no reason to keep these when flattening since they are invisible. This may include unchecked checkboxes, unshown popup windows, etc.
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mingw doesn't like it when you don't inline empty virtual destructors.
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Allow fine control over how passwords are encoded for writing, and allow password for reading to be given as a hexademical encoded string. Allow suppression of password recovery as a means to ensure that the password you specify is actually the right one.
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Push calls to processFile and processInputSource into separate functions in preparation for password recovery changes
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Setting encryption permissions for R >= 3 set permission bits in groups corresponding to menu options in Acrobat 5. The new API allows the bits to be set individually.
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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.