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The implementation does not need to be in the public API.
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Move the definition of fz_font to be in a private header file
rather than in the public API. Add accessors for specific
parts of the structure and use them as appropriate.
The font flags, and the harfbuzz records remain public.
This means that only 3 files now need access to the font
implementation (font.c, pdf-font.c and pdf-type3.c). This
may be able to be improved further in future.
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Since the removal of the begin_page device function, structured
text extraction has been unable to correctly establish the
mediabox for extracted pages.
Update the fz_new_stext_page call to take this mediabox
information. This is an API change, but hopefully most people
are calling fz_new_stext_page_from_page or
fz_new_stext_page_from_display_list which are updated here to
cope.
Update all the apps/tools to behave properly.
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Closing a device or writer may throw exceptions, but much of the
foreign language bindings (JNI and JS) depend on drop to never throw
an exception (exceptions in finalizers are bad).
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Normal glyphs and inital glyphs in ligatures have their start/stop (p
and q) set before determining whether to append to an existing span or
insert a space. For non-initial glyphs the start/stop were never set
which introduced uninitialized values into the span data structure.
Now, all glyphs have their start/stop set and then if it is a
non-initial glyph in a ligature the append and space detection is
ignored. This means that no values are uninitialized.
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Garbage collected languages need a way to signal that they are done
with a device other than freeing it.
Call it implicitly on fz_drop_device; so take care not to call it again
in case it has been explicitly called already.
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To be moved into a new document writer interface later.
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Image objects are immutable and opaque once constructed.
Therefore there is no need for the const keyword.
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It's an opaque immutable structure, that we don't expect to ever want
to change after creation. Therefore the const keyword is not useful,
and is only line noise.
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Make the import follow mupdf style (better, if not perfect).
Use ucdn where possible to avoid duplicating tables.
Shrink the types, make them explicit (e.g. use fz_bidi_level rather
than int) and make tables const.
Use 32-bit integers for text.
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In general, we should use 'const fz_blah' in device calls whenever
the callee should not alter the fz_blah.
Push this through. This shows up various places where we fz_keep
and fz_drop these const things.
I've updated the fz_keep and fz_drops with appropriate casts
to remove the consts. We may need to do the union dance to avoid
the consts for some compilers, but will only do that if required.
I think this is nicer overall, even allowing for the const<->no const
problems.
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We can now group all clipped text into one fz_text object and simplify
the device interface.
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Less risk of confusion with the text type used in the device interface.
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MuPDF (the win32/linux viewer) leaks a span_soup each time it
is run, even if (seemingly to the user) no text extraction
operations are done.
This is because the view does a text extraction pass silently,
during which 'begin_page' is called for both page contents and
annotation contents. This causes a leak of a span_soup.
Change the implementation to allocate the span_soup just in time
instead.
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When advancing a glyph in vertical mode, it should advance down the page.
The origin of the glyph as supplied is bottom left, not top right - allow
for this in calculations. Previously glyphs were not being collated into
spans because of this.
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In vertical motion mode, when calculating bboxes we should use
horizontal rather vertical displacements from the 'axis of
movement'.
In horizontal mode, we displace by 'ascender' and 'descender'.
Those concepts don't rotate with the motion mode, so repurpose
those fields to hold bbox.x0 and bbox.x1 in vertical mode.
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We were not filling in the matrix and bbox fields for images
collected as part of the text extraction device. Fixed here.
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Thanks to malc for pointing out the problem.
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Purge several embedded contexts:
Remove embedded context in fz_output.
Remove embedded context in fz_stream.
Remove embedded context in fz_device.
Remove fz_rebind_stream (since it is no longer necessary).
Remove embedded context in svg_device.
Remove embedded context in XML parser.
Add ctx argument to fz_document functions.
Remove embedded context in fz_document.
Remove embedded context in pdf_document.
Remove embedded context in pdf_obj.
Make fz_page independent of fz_document in the interface.
We shouldn't need to pass the document to all functions handling a page.
If a page is tied to the source document, it's redundant; otherwise it's
just pointless.
Fix reference counting oddity in fz_new_image_from_pixmap.
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Rename fz_close to fz_drop_stream.
Rename fz_close_archive to fz_drop_archive.
Rename fz_close_output to fz_drop_output.
Rename fz_free_* to fz_drop_*.
Rename pdf_free_* to pdf_drop_*.
Rename xps_free_* to xps_drop_*.
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