-
Add getAttribute for handling inheritable page attributes, and fix getPageImages and annotation flattening code to use it.
-
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.
-
Instead of directly putting the contents of the annotation appearance streams into the page's content stream, add commands to render the form xobjects directly. This is a more robust way to do it than the original solution as it works properly with patterns and avoids problems with resource name clashes between the pages and the form xobjects.
-
Flatten annotations by integrating their appearance streams into the content stream of the containing page. In the case of form fields, only flatten if /NeedAppearance is false (or equivalently absent). If flattening form fields, also remove /AcroForm from the document catalog.
-
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.