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The original version of the test-device could characterise pages
as being grayscale/color purely based on the colorspaces used.
This could easily be upset by grayscale images or shadings that
happened to be specified in non-grayscale colorspaces however.
We now look at the actual shading and image color values, and use
a threshold value to allow for some measure of rounding errors in
color values that are in practice grayscale.
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Currently only tests for the presence of non-grayscale color.
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It has no real reason to live in mudraw, and it does pull in the
javascript dependency via pdf-form.c.
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New routine to filter the content streams for pages, xobjects,
type3 charprocs, patterns etc. The filtered streams are guaranteed
to be properly matched with q/Q's, and to not have changed the top
level ctm. Additionally we remove (some) repeated settings of
colors etc. This filtering can be extended to be smarter later.
The idea of this is to both repair after editing, and to leave the
streams in a form that can be easily appended to.
This is preparatory to work on Bates numbering and Watermarking.
Currently the streams produced are uncompressed.
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When you use mutool clean to subset pages out of a PDF, we already
remove the Name tree entries for named locations that aren't in the
target file. We have henceforth failed to remove references to these
removed names though. This can cause errors (really warnings) on
reading the file back.
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Firstly, we remove the use of global variables; this is done by
introducing a 'globals' structure for each of these files and
passing it internally between functions.
Next, split the core of pdfclean_main into pdfclean_clean, and the
core of pdfinfo_main into pdfinfo_info.
The _main functions now do the argv processing. The new functions now
run entirely thread safely, so can be called from library functions.
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Windows doesn't like redirecting binary output, so add an explicit
filename argument.
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We define a document handler for each file type (2 in the case of PDF, one
to handle files with the ability to 'run' them, and one without).
We then register these handlers with the context at startup, and then
call fz_open_document... as usual. This enables people to select the
document types they want at will (and even to extend the library with more
document types should they wish).
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Some warnings we'd like to enable for MuPDF and still be able to
compile it with warnings as errors using MSVC (2008 to 2013):
* C4115: 'timeval' : named type definition in parentheses
* C4204: nonstandard extension used : non-constant aggregate initializer
* C4295: 'hex' : array is too small to include a terminating null character
* C4389: '==' : signed/unsigned mismatch
* C4702: unreachable code
* C4706: assignment within conditional expression
Also, globally disable C4701 which is frequently caused by MSVC not
being able to correctly figure out fz_try/fz_catch code flow.
And don't define isnan for VS2013 and later where that's no longer needed.
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Set the hint in mudraw when AA bits is set to 0.
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SumatraPDF's testsuite uses Targa images as output because they're
compressed while still far easier to compare than PNG and have better
tool support than PCL/PWG.
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The most complex part here is to ensure that we can output various
bitmaps in bands.
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This allows us to "mudraw -F ppm -o /dev/null" etc.
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Thanks to Pengsu Cheng for pointing out the problem.
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No more caching a flattened page tree in doc->page_objs/refs.
No more flattening of page resources, rotation and boxes.
Smart page number lookup by following Parent links.
Naive implementation of insert and delet page that doesn't rebalance the trees.
Requires existing page tree to hook into, cannot be used to create a page tree
from scratch.
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For historical reasons lots of the code uses "xref" when talking about
a pdf document. Now pdf_xref is a separate type this has become
confusing, so replace 'xref' with 'doc' for clarity.
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Remove the fz_context field to avoid the structure growing.
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Match our naming conventions.
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