we add a try/catch to the direct object finder's tryget method so it returns false rather than throwing.
if we have an acro-form reference in the catalog but no corresponding object in the document we instead scan all objects in the document to find form fields and reconstruct the acro-form dictionary.
if the %pdf version header comment is offset from the start of the file the cross reference offsets will also be wrong by that amount. this change updates the cross reference location logic to use the offset from the located version header.
if the font descriptor uses the fromsubtype flag the actual type of the font can differ from that specified in the font dictionary. in this case a truetype font actually contains a type1c, compact font format, font. in this case we fall back to using the type1 parser.
also handles a closesubpath command appearing without any path construction operators.
an %%eof for a pdf file may appear further back than the last 1024 bytes. this change doubles the search range. it also handles an empty differences array being defined for a font encoding.
we also remove the old approach to dependency injection from the code since we are now favouring static classes where possible.
the 3 font types mentioned are moved to the new fonts project, any referenced types are moved to the core project. most truetype classes are made public #8.
to make the project more useful and expose more usable classes we're rearchitecting in the following way. code used to read fonts from external file formats like truetype, adobe font metrics (afm) and adobe type 1 fonts are moving to a new project which doesn't reference most of the pdf logic. the shared logic is moving to a new flat-structured project called core. this is a sort-of onion type architecture, with core being the... core, fonts being the next layer of the onion, pdfpig itself the next. this will then support additional libraries/projects as outer layers of the onion as well as releasing standalone version of the font library as pdfbox does with fontbox.
previously the only way to test if a password was correct was to supply a single password and throw if the value was incorrect. this was slow. now parsing options supports a list of passwords as well as a single password option (which is equivalent to a list with a single item). these passwords are all tested at the same time and an exception is only thrown once all passwords are tested.
* cid cff fonts have multiple sub-fonts and multiple private dictionaries, in addition to a top level font and private dictionary. this fix uses the specific sub-dictionary when getting local subroutines on a per-glyph basis.
* chinese, japanese or korean fonts can use a ucs-2 encoding cmap for retrieving unicode values.
* add support for the additional glyph list for unicode values in true type fonts. adds nonmarkingreturn mapping to carriage return.
* makes font parsing classes static where there's no reason for them to be per-instance.
support both xobject and inline images. adds unsupported filters so that exceptions are only thrown when accessing lazily evaluated image.bytes property rather than when opening the page.
treat all warnings as errors.
package license url is deprecated in favour of package license expression but nuget doesn't seem to support expressions properly for published packages yet so we'll keep the deprecated url for the time being. having both url and expression causes the build to fail.
small obvious performance improvements for file header passing and getting the encoding information using the existing reverse name to code map.
handle "unionsq" and other tricky glyph names. log missing glyphs. ignore flexpoints in type 1 subroutines. improve system font performance and substitution. handle truetype fonts using standard 14 fonts.
temporary 'safe' untested implementation of seac for type 1 charstrings.
make structure public
bump version of package and project to 0.0.3 (it had accidentally increased to 0.0.5)
