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Previously, signature verification worked only for file-based documents
and the file path had to be passed into the verification function.
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This goes well with the 'mutool clean -d' decompression option to debug
content streams, without doing the sanitize optimization pass.
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Also clarify that a copy of author/contents is returned, and that
the caller must free them.
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This mirrors the existing PDFObject.asByteString().
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Previously when metadata was not found mupdf still tried
to return a string to the caller, but the string was uninitialized.
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This way the MuPDF library itself only uses fz_snprintf for
consistent formatting.
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This affects the given character bboxes.
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If nothing else, this avoids warnings on VS2005.
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Also, fix mudraw messages about what types can be banded.
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Any pixmap writers that can handle data with an alpha plane
should accept that data in premultiplied form, and write it out
appropriately for the file format.
This avoids the need to unpremultiply data in mudraw, and solves
the issue we were seeing where we want the png writer to be able
to cope with premultiplied data (such as for the debug blending
routines) and unpremultiplied data (such as that given after
mudraw has unpremultiplied the data).
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Closing flushes output and may throw exceptions.
Dropping frees the state and never throws exceptions.
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Don't mess with conditional compilation with LARGEFILE -- always expose
64-bit file offsets in our public API.
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First, we add an fz_page_overprint function to detect if a
page uses overprint. Only PDF implements this currently (other
formats all return false). PDF looks for '/OP true' in any
ExtGState entry.
We make Mutool check this. If it finds it, and spot rendering
is not completely disabled, then it ensures that the separation
object passed to the pixmap into which we draw is non NULL. This
causes the draw device to do overprint simulation.
We ensure that mutool draw defaults to having the spot rendering
mode default to simulation in builds that support it.
Finally, we ensure that if an output intent is set by the document,
and spot rendering is not completely disabled, then we ensure the
seps object is non NULL so that we render to a group in the
specified output intent, and THEN convert down to the required
colorspace for the output.
This should make us match acrobats behaviour.
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Running Ghent_V5.0/GWG010_CMYK_OP_x3.pdf to PNG produces
'X' marks, where Acrobat does not. This is expected if
overprint similation is turned off, but not if it is
enabled.
The file does not define a colorspace for the initial page,
uses no transparency, and has no spots defined. Accordingly,
when we clone the page fz_separation object, we end up with
no object at all. The draw device therefore doesn't even
attempt to do overprint simulation.
We fix this by ensuring that we always have a non-NULL
separation object. Possibly we should make fz_page_separations
return a non-NULL, but empty object?
Even with this change, running to PNG still does not give the
required rendering. This is because PNGs use RGB, rather than
CMYK, and overprint is disabled for non-subtractive spaces.
We therefore adjust the code in push_group_for_separations
that decides whether it can avoid pushing an extra group.
If the basic pixmap is RGB, then we never skip the extra
group.
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This is a first cut to get us to demo-ability. There will
likely be a few changes as we do a bit more testing with different
scenarios with Gray, RGB, CMYK combos of destination, proof and
output intent ICC profiles.
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Both bandwriter and document_writer interfaces cope with multi
page docs.
Update mudraw to output pclm format too.
Incorporates fixes from Tor.
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Avoid double freeing the device colorspaces.
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The code only worked for string literals, not garbage collected or
short strings.
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Fix color PCL writing bugs introduced when making alpha channels
in pixmaps optional.
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Option parsing is not implemented yet.
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* Use pool allocator and linked lists for all levels.
* Remove separate fz_stext_sheet struct.
* Remove unused 'script' style.
* Remove 'span' level items.
* Detect visual/logical RTL layouts.
* Detect indented paragraphs.
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Improve HTML output using absolute positioning, and add XHTML output
for simpler semantic html output.
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If drawing to psd we now render with spots.
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PSD writer now outputs spot colors. Ensure subtractive
colorspaces are stored with proper polarity. The CMYK
and spot components need to be 255-X in the PSD format
Store PSD format resources using correct Pascal style strings.
Photoshop will fail to open if the the ICC profile resource
name is not in proper format.
(Incorporates fixes from Michael).
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Update separations interface further to cope with whether spots
should be rendered separately, or as composite colors.
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Also force softmasks to be isolated groups.
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Also fix a typo causing the help message not to be shown
when threading is enabled.
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