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configure.py: sanitize restrictive policies of IM on some distributions.

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Some distros banned GS for Imagemigick conversions.
In effect eps->png conversion is broken and this can't
be fixed locally by the user.

Our workaround is to allow eps->pdf->png conversion from
different tools when IM bans the conversion.

https://www.mail-archive.com/lyx-devel@lists.lyx.org/msg217834.html
This commit is contained in:
Pavel Sanda 2022-08-12 01:03:09 +02:00
parent 9686fe0c79
commit bd0510b08f
1 changed files with 21 additions and 4 deletions
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25
lib/configure.py
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@ -1087,13 +1087,15 @@ def checkConverterEntries():
# Only define a converter from pdf6 for graphics
checkProg('a PDF to EPS converter', ['pdftops -eps -f 1 -l 1 $$i $$o'],
rc_entry = [ r'\converter pdf6 eps "%%" ""' ])
# Define a converter from pdf6 to png for Macs where pdftops is missing.
# sips:Define a converter from pdf6 to png for Macs where pdftops is missing.
# The converter utility sips allows to force the dimensions of the resulting
# png image. The value of 800 pixel for the width is arbitrary and not
# related to the current screen resolution or width.
# There is no converter parameter for this information.
#
#pdftoppm: Some systems ban IM eps->png conversion. We will offer eps->pdf->png route instead.
checkProg('a PDF to PNG converter',
['sips --resampleWidth 800 --setProperty format png $$i --out $$o'],
['sips --resampleWidth 800 --setProperty format png $$i --out $$o' , 'pdftoppm -r 72 -png -singlefile $$i > $$o'],
rc_entry = [ r'\converter pdf6 png "%%" ""' ])
# Create one converter for a PDF produced using TeX fonts and one for a
# PDF produced using non-TeX fonts. This does not produce non-unique
@ -1190,8 +1192,23 @@ def checkConverterEntries():
checkProg('an EPS -> PDF converter', ['epstopdf'],
rc_entry = [ r'\converter eps pdf6 "epstopdf --outfile=$$o $$i" ""'])
#
checkProg('an EPS -> PNG converter', ['magick $$i[0] $$o', 'convert $$i[0] $$o'],
rc_entry = [ r'\converter eps png "%%" ""'])
# Due to more restrictive policies, it is possible that (image)magick
# does not allow conversions from eps to png.
# So before setting the converter test it it on a mock file
_, cmd = checkProg('an EPS -> PNG converter', ['magick', 'convert'])
if cmd:
writeToFile('mock.eps', r'%!PS')
try:
subprocess.check_call([cmd, "mock.eps", "mock.png"])
removeFiles(['mock.eps', 'mock.png'])
rc_entry = r'\converter eps png "%s $$i[0] $$o" ""'
addToRC(rc_entry % cmd)
except:
removeFiles(['mock.eps'])
#needs empty record otherwise default converter will be issued
rc_entry = r'\converter eps png "" ""'
addToRC(rc_entry)
logger.info('ImageMagick seems to ban conversions from EPS. Disabling direct EPS->PNG.')
#
# no agr -> pdf6 converter, since the pdf library used by gracebat is not
# free software and therefore not compiled in in many installations.