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Keep a list of currently open pages for each document. Attempting to
load a page that is already loaded will return the same instance again.
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The signer object now has an extra method that informs the caller of
the maximum size the digest might be. This is used to allocate space for
the digest within the file and to size some of the buffers used in the
code.
The openssl-based inplementation of the signer object has been updated to
perform a test digest generation so as to find the size needed. We
believe that the digest size is indendent of the hashed data.
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This was used to prevent infinite cycles in the Type3 font CharProcs,
but the previous commits forbids all cycles in order to prevent memory
leaks due to cyclic reference counts.
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pdf_get_inheritable also looks in trailer/Root/AcroForm for missing keys,
but this behavior is not supported by anything in the specification.
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Use separate functions to keep the code simpler.
Use memmem to simplify and optimize search for 'endstream' token.
Do not look for 'endobj' since that could cause a false positives in
compressed object streams that have duff lengths.
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The intent is for a user to iterate over the annotations on a page calling
pdf_update_annot for each one. If this function returns true, then the
annotation has changed since the last time it was called, and the user
needs to re-render.
pdf_update_page is a simple loop over the annotations on a page, for use
if you only care about page level granularity.
Users should no longer look at or change the pdf_annot.has_new_ap field.
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Alter pdf_can_be_saved_incrementally to return false when a hybrid xref
file has been opened. This doesn't enforce the behaviour, but will ensure
it for apps that determine their behaviour via this test function.
Once changes have been saved to such a file, it is no longer hybrid and so
further saving steps can use incremental updates.
This change was made because we were previously unable to sign hybrid xref
documents in a way that was satisfactory to Adobe Reader. Adobe Reader
reorganises hybrid xref files, thus invalidating any signature.
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Always look for the "endstream" marker after a PDF stream to see
if we've hit the end. Allow for "endobj" to cope with producers
that omit endstream entirely.
Avoid slowing down legal files by only checking for the end marker
after the specified length has been read.
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The pdf_update_signature_appearance function must be called directly by
the signing code when it signs the document; as only the signing code has
all the text that needs to be written into the appearance.
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Create a matrix that transforms a page with resolution and rotation,
and grid fits the resulting bounding box.
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Several things irk me about passing values as const pointers:
* They can be NULL, which is not a valid value.
* They require explicit temporary variables for storage.
* They don't compose easily in a legible manner, requiring
weird pointer passing semantics where the variable being assigned
is hidden as an argument in the innermost function call.
* We can't change the value through the pointer, requiring yet more
local variables to hold copies of the input value.
In the device interface where we pass a matrix to a function, we often
find ourselves making a local copy of the matrix so we can concatenate
other transforms to it. This copying is a lot of unnecessary busywork
that I hope to eventually avoid by laying the groundwork with this
commit.
This is a rather large API change, so I apologize for the inconvenience,
but I hope the end result and gain in legibility will be worth the pain.
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Updates the input point coordinates, and also returns a quad with
appropriate UI handles.
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Since the function no longer returns ownership of the string, use the
common naming convention.
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Removes the need to alloc/free text strings in the API, allowing
for simple functions like pdf_dict_get_text_string.
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We do not support rich text content; remove the properties rather than
leave them untouched and out of sync with the simple contents and styles.
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Now handles more annotation types, and does not use the pdf-write device.
Handles many of the usual annotation properties, such as border width,
color, interior color, line ending styles.
* Ink
* Highlight, Underline, Strike-Out, Squiggly
* Line (with arrow-heads)
* Polygon
* PolyLine
* Square
* Circle
* Caret
* Text (needs better icons)
* FileAttachment (needs better icons)
* Sound (needs better icons)
* Stamp
* FreeText
Partially complete:
* Widget (treats everything like a plain text field)
Not done, but on the to-do list:
* /BS style (solid/dashed/bevel/inset/underline)
* /BS dash pattern
Not done and not on the list:
* Movie
* Screen
* Printer's Mark
* Trap Network
* Watermark
* /Border corner radii (ignored by acrobat)
* /BE cloudy border effect
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The Noto symbol font has been split into two. The second symbol font only
contains a subset of the emojis, so reinstate the real emoji font and add
both symbol fonts to the fallback chain.
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Remove the mutiff document type.
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Return TTC subfont index from fz_lookup_noto_font.
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Also support Vertical WMode.
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