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The ARM optimised code relied on the size of the weights structure
which was changed by the addition of a new member as part of the
patch scaling changes. Fix the code here, and add a note to the
structure in the hopes that this will avoid such breakages happening
in future.
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When scaling a bitmap, currently we always scale the entire bitmap,
even if we only need a small section of the result.
This patch changes the code to take an optional 'clip' bbox, and
only scales as many pixels as are required to generate the required
output region.
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This reverts commit 08e84b18e5c1dbe8f3d32dd0aeb4b4c43debce9f.
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When scaling a bitmap, currently we always scale the entire bitmap,
even if we only need a small section of the result.
This patch changes the code to take an optional 'clip' bbox, and
only scales as much of the input as as required for this output
region.
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Also: use 'cannot' instead of 'failed to' in error messages.
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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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Extract the grid fitting code from the scaling code and the affine image
drawing code into it's own separate function. This reduces code
duplication. It also allows us to make better allowance for rounding
errors.
Add a voodoo offset in the draw_affine.c code for painting interpolated
images. This gives us the best possible match between all the different
combinations of scaled/unscaled and interpolated/uninterpolated images.
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draw_simple_scale.c is a cut down version of draw_scale.c, that only
uses filter functions that return values strictly in the 0 to 1 range.
Because of that, we can use bytes rather than ints as intermediate
storage, and have no clipping to do.
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