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Avoid unhandled exceptions. Thanks to Zeniko for this.
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In pdfshow, if we fail to parse an object, just skip it rather than
aborting. Thanks to Zeniko for the suggestion.
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The logic controlling whether to expand a trailer dictionary
or not was reversed. Fixed here. Thanks to Zeniko for pointing
this out.
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A new 'cookie' parameter is added to page rendering/interpretation
functions. Supply this as NULL to get existing behaviour.
If you supply a non-NULL cookie, then this is taken as a pointer to
a struct that can be used for simple, non-thread locked communication
between caller and library.
The entire struct should be memset to zero before entry, except for
specific flags (thus coping with future extensions to this struct).
The abort flag should be zero on entry. It will be checked periodically
by the library - if the caller sets it non-zero (via another thread)
then the current operation will be aborted. No guarantees are given as
to how often this will be checked, or how fast it will be responded to.
The progress_max field will be set to an integer (-1 for unknown)
representing the number of 'things' to do. The progress field will
count up from 0 to this number as time goes by. No guarantees are
made as to the accuracy of this information, but it should be
useful for offering some sort of progress bar etc. Note that
progress_max may increase during the job.
In general, callers should be careful to accept out of range or
invalid data in this structure as this is deliberately
accessed 'unlocked'.
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Add simple combined exe build for mupdf/muxps tools.
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In order for hyperlinks to work, we need to load the outlines after
the pages tree.
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Move 'kind' into the fz_link_dest structure (as this makes more sense).
Put an fz_link_dest rather than just a page number into the outlines
structure.
Correct parsing of actions and dests from pdf outlines.
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Move to a non-pdf specific type for links. PDF specific parsing is
done in pdf_annots.c as before, but the essential type (and handling
functions for that type) are in a new file fitz/base_link.c.
The new type is more expressive than before; specifically all the
possible PDF modes are expressable in it. Hopefully this should
allow XPS links to be represented too.
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Fixes for leaks (and SEGVs, division by zeros etc) seen when
Memsqueezing.
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Fix warnings/errors thrown up by the last few commits (which were
only tested on windows).
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When fz_malloc (etc) are about to fail, we try to scavenge memory
from the store and then retry. We repeatedly try to bin objects
from the store until the malloc succeeds, or until we have nothing
else to bin.
This means we no longer need the 'aging' of the store, so this is
removed.
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Change the fz_store to be limited to 256 Megs. Remove the soft limit
for pixmaps; the store will automatically throw old resources away
to stay below the limit.
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Firstly, we rename pdf_store to fz_store, reflecting the fact that
there are no pdf specific dependencies on it.
Next, we rework it so that all the objects that can be stored in
the store start with an fz_storable structure. This consists of
a reference count, and a function used to free the object when
the reference count reaches zero.
All the keep/drop functions are then reimplemented by calling
fz_keep_sharable/fz_drop_sharable. The 'drop' functions as supplied
by the callers are thus now 'free' functions, only called if
the reference count drops to 0.
The store changes to keep all the items in the store in the linked
list (which becomes a doubly linked one). We still make use of
the hashtable to index into this list quickly, but we now have
the objects in an LRU ordering within the list.
Every object is put into the store, with a size record; this is
an estimate of how much memory would be freed by freeing that
object.
The store is moved into the context and given a maximum size;
when new things are inserted into the store, care is taken to
ensure that we do not expand beyond this size. We evict any
stored items (that are not in use) starting from the least
recently used.
Finding an object in the store now takes a reference to it already.
LOCK and UNLOCK comments are used to indicate where locks need to
be taken and released to ensure thread safety.
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Update pdfclean with some new decompression options; -d changes it's
definition (though not it's behaviour) to mean "decompress all
streams".
New flags, -i and -f toggle the decompression of image and font streams
respectively.
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Also: use 'cannot' instead of 'failed to' in error messages.
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Remove use of 'die', in place of proper exception handling.
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At some point I'd mismerged some code for handling app->doctitle,
resulting in app->doctitle pointing to something that's not a heap
block. This caused an error when app->doctitle was freed at closedown.
Remove the offending code and all is well.
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In builds that support configurable layers of antialiasing, move
the variables that control this into the context. This makes it
possible to safely use different levels of antialiasing in different
threads.
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Take on a (cosmetically tweaked) version of Zenikos patch to allow
pdfclean to keep link destinations that are in preserved pages.
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Encryption bakes the object numbers into the strings/streams. This
means that our renumbering technique falls down; when we move an
object to its new position, then come to read it, we find that it
decrypts badly.
The fix here is (as suggested by Zeniko) to avoid renumbering
when encryption is in use.
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Mostly redoing the xps_context to xps_document change and adding
contexts to newly written code.
Conflicts:
apps/pdfapp.c
apps/pdfapp.h
apps/x11_main.c
apps/xpsdraw.c
draw/draw_device.c
draw/draw_scale.c
fitz/base_object.c
fitz/fitz.h
pdf/mupdf.h
pdf/pdf_interpret.c
pdf/pdf_outline.c
pdf/pdf_page.c
xps/muxps.h
xps/xps_doc.c
xps/xps_xml.c
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Signed-off-by: Sebastian Rasmussen <sebras@gmail.com>
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Based on a patch by Zhihao Yuan <lichray@gmail.com>.
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Based on a patch by Zhihao Yuan <lichray@gmail.com>.
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This was removed during a previous commit to make the editing easier.
Now added back in.
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This frees us from passing errors back everywhere, and hence enables us
to pass results back as return values.
Rather than having to explicitly check for errors everywhere and bubble
them, we now allow exception handling to do the work for us; the
downside to this is that we no longer emit as much debugging information
as we did before (though this could be put back in). For now, the
debugging information we have lost has been retained in comments
with 'RJW:' at the start.
This code needs fuller testing, but is being committed as a work in
progress.
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