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See Bug 688655 for analysis of what we SHOULD be doing. The code changes
to do this are actually quite small.
Essentially, when we join we only draw the 'top' (or 'outer') join in a
join dependent way. The 'under' join was always joined as a bevel before
as this was easy. This produces bad effects when the lines have a
significant angle between them and a large linewidth.
The correct (i.e. matching Acrobat and others) way to work is to
join the bottom of the line via the centre point. The sole exception
to this is when drawing under beziers, as we don't want to make our
approximation-by-lines obvious.
All fixed in this patch.
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Attempt to separate public API from internal functions.
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Modified version of Sumatras patch. Thanks for this.
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XPS differs from PS/PDF/etc in the way it handles miters; rather than
simply converting a miter that's overly long to a bevel, it truncates
it at the miter limit. As such it needs to be handled correctly.
For clarity, expose new enumerated types for linejoins and linecaps,
and use these throughout code.
When we upgrade our freetype, we can move to using proper xps mitering
in that too.
Add new fz_matrix_max_expansion function to return a safer expansion
value that works in the case where we scale up in one direction and
down in another.
In the xps path drawing code, avoid generating unnecessary linetos.
Thanks to Zeniko for spotting these and providing implementations.
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Take on a modified version of Zenikos patch; only take the quick
exit if the whole dash length is small, or if the dash_length
scaled up by the maximum possible scale in the ctm is less than
1/2 a pixel.
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They test for NULL and make the code look nicer.
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The run-together words are dead! Long live the underscores!
The postscript inspired naming convention of using all run-together
words has served us well, but it is now time for more readable code.
In this commit I have also added the sed script, rename.sed, that I used
to convert the source. Use it on your patches and application code.
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