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This has knock on effects in the store.
fix
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Update the test device so it can be used 'wrapping' another
device.
In particular, it can be used to wrap the display list device
so that we can evaluate 'color or not' while building the
display list rather than having to rerun the display list
afterwards.
Also, give improved control over whether we test every pixel
of images/shadings.
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PAM output was broken in the absence of alpha. Fixed now.
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fz_pixmaps now have an explicit stride value. By default no change
from before, but code all copes with extra gaps at the end of the
line.
The alpha data in fz_pixmaps is no longer compulsory.
mudraw: use rgb not rgba (ppmraw), cmyk not cmyka (pkmraw).
Update halftone code to not expect alpha plane.
Update PNG writing to cope with alpha less input.
Also hide repeated params within the png output context.
ARM code needs updating.
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Add some paranoid checks to pdf_graft_object to prevent user
errors from crashing mupdf.
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Remove unnecessary extra indirect object; pdf_add_object returns
an indirect reference already, so we don't need to duplicate it.
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Use comma-separated list of flags and key/value pairs, for
example: "linearize,resolution=72,colorspace=gray"
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This makes it possible to redirect standard out and standard error output
streams to output streams of your liking.
This means that now you can, in gdb, type:
(gdb) call pdf_print_obj(ctx, fz_stdout(ctx), obj, 0)
(gdb) call fflush(0)
or when dealing with an unresolved indirect reference:
(gdb) call pdf_print_obj(ctx, fz_stdout(ctx), pdf_resolve_indirect(ctx, ref), 0)
(gdb) call fflush(0)
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Calculations need to be done differently.
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There was a race condition on bgprint.pagenum that could cause
the bgprint worker to close down early, leaving the main thread
waiting for notification of its closedown.
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Add -P flag to mudraw to do 'parallel' rendering. We shift rendering
onto a background thread, so that the main thread can continue
interpreting page n+1 while page n is being rendered.
To do this, we extract the core of the drawpage routine into
'dodrawpage', and either call it directly (in the normal case)
or from a bgprint worker thread (in the parallel case).
The threading construction exactly parallels that of the threaded
band rendering. We have a semaphore to start the render process,
a semaphore to indicate when the process has stopped, and the
thread itself.
The most complex thing here is the rejigging of the printfs
required to ensure that we still get the timings displayed in a
sane way.
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Apparently neither OSX nor iOS support unnnamed semaphores,
so steal the gs versions and use them instead.
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Update the core fz_get_pixmap_from_image code to allow fetching
a subarea of a pixmap. We pass in the required subarea, together
with the transformation matrix for the whole image.
On return, we have a pixmap at least as big as was requested,
and the transformation matrix is updated to map the supplied
area to the correct place on the screen.
The draw device is updated to use this as required. Everywhere
else passes NULLs in, and so gets unchanged behaviour.
The standard 'get_pixmap' function has been updated to decode
just the required areas of the bitmaps.
This means that banded rendering of pages will decode just the
image subareas that are required for each band, limiting the
memory use. The downside to this is that each band will redecode
the image again to extract just the section we want.
The image subareas are put into the fz_store in the same way
as full images. Currently image areas in the store are only
matched when they match exactly; subareas are not identified
as being able to use existing images.
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The handling of not-decompressing images/fonts was geared towards
pdfclean usage; but now that we can create new PDF files, it makes
more sense to ask for images and fonts to be compressed, rather than
asking for them not to be decompressed with quirky interaction with
the 'expand' and 'deflate' flags.
If -f or -i are set, we will never decompress images, and we will
compress them if they are uncompressed.
If -d is set, we will first decompress all streams (module -f or -i).
If -z is set, we will then compress all uncompressed streams.
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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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When we clone the context, we copy the AA levels from the
base context into the cloned context. This means that we
must set the AA levels in the base context BEFORE cloning
if we want them to be the same everywhere (or set them
explicitly in all contexts).
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It's a lot of extra typing to prefix everything with "mupdf.".
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Resources are defined before they are used; so it's only logical to
have the resource dictionary before the content buffer in the argument
list.
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Only supports CBZ writing for now.
Also add a zip file writer.
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This commit adds a page merging tool. The tool demonstrates the
use of object grafting. The object grafting function recursively
goes through the object to add all referenced objects. A map is
maintained to ensure that objects that have already been copied are
not copied again.
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If used, PDF objects are cleared at the end of each page, and
the store size is set to 1 byte, avoiding the caching of images.
This trades repeated decoding of images/reading of file objects
for memory usage. The purpose of this is to enable measurements to
be made on the minimum possible memory level.
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And use the same enum for both the internal bidi code and the layout code.
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Also remove redundant assignments.
Fixes http://bugs.ghostscript.com/show_bug.cgi?id=695968
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