Autodetect whether pgf can use \includegraphics[interpolate]. #15150
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This is done by reusing the same LatexManager instance as the one used
for measuring text extents.
As an aside, this exposes an awkwardness in the implementation of
LatexManager -- after an error occurs, the instance needs to be
discarded (ideally, the instance would auto-create a new subprocess).
This is why _get_image_inclusion_command manually discards the cached
instance in such a case.
For recent setups where \includegraphics[interpolate=true] is available,
the cost of this PR is essentially just an additional
\usepackage{graphicx} executed once; for older setups, an additional
instantiation of a latex subprocess (only once).
This can't be tested on CI because Travis' version of latex is too old,
but can be manually tested by inspecting a resulting pgf output, and
possibly changing `interpolate=true` by a nonexistent option (e.g.
`foobar` and checking that there's fallback to \pgfimage in that case.
tacaswell
approved these changes
Aug 28, 2019
|
Ubuntu Bionic seems to be available on Travis now. Is there still reason to support those very old TeX distributions where \includegraphics fails? |
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Either way works for me, if you can make travis pass with includegraphics. |
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I would also be 👍 on documenting the minimum versions of latex required for PGF, skipping the test if we can detect a too-old latex so long as at least 1 CI runs the test. |
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On a bit more consideration, the complexity to support both old and new versions of latex is not great so we might as well. I have a slight preference for this PR over #10973. |
pwuertz
approved these changes
Sep 4, 2019
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Closes #10963 (see discussion there); replaces #10973.
This is done by reusing the same LatexManager instance as the one used
for measuring text extents.
As an aside, this exposes an awkwardness in the implementation of
LatexManager -- after an error occurs, the instance needs to be
discarded (ideally, the instance would auto-create a new subprocess).
This is why _get_image_inclusion_command manually discards the cached
instance in such a case.
For recent setups where \includegraphics[interpolate=true] is available,
the cost of this PR is essentially just an additional
\usepackage{graphicx} executed once; for older setups, an additional
instantiation of a latex subprocess (only once).
This can't be tested on CI because Travis' version of latex is too old,
but can be manually tested by inspecting a resulting pgf output, and
possibly changing
interpolate=trueby a nonexistent option (e.g.foobarand checking that there's fallback to \pgfimage in that case.PR Summary
PR Checklist