def convert(self, outfn=None, **params):
if outfn is not None and File(fn=outfn).fn != self.fn:
self.write(fn=outfn)
else:
outfn = self.fn
res = Image(fn=outfn).mogrify(**params)
return outfn + ': ' + res
def insert(self,
text=None,
data=None,
prefix="",
suffix="",
ext='.txt',
duplicate=False):
"""insert the given queue entry into the queue.
text = the text of the queue entry (REQUIRED)
prefix = a prefix for each queue entry filename (default '')
suffix = a suffix for each queue entry filename (before extension, default '')
ext = the extension of the queue entry filename (default '.json')
"""
# only insert the entry if there is no other entry containing the same data
# -- no need to duplicate an existing entry.
if duplicate == False:
qfns = self.list()
for qfn in qfns:
try:
with open(qfn, 'rb') as f:
qft = f.read().decode('utf-8')
if qft == text:
return qfn
except:
# queue managed to get to the file before we read it -- no need to keep reading,
# since they are processed in the same order by self.list()
break
qfn = os.path.join(
self.path,
"%s%s-%.5f%s%s" % (prefix, time.strftime("%Y%m%d.%H%M%S"),
random.random(), suffix, ext))
if text is not None:
qf = Text(fn=qfn, text=text)
elif data is not None:
qf = File(fn=qfn, data=data)
qf.write()
return qfn
def gswrite(self,
fn=None,
device='jpeg',
res=600,
alpha=4,
quality=90,
gs=None):
"use ghostscript to create output file(s) from the PDF"
gs = (gs or self.gs or os.environ.get('gs') or 'gs')
# count the number of pages
if fn is None:
fn = os.path.splitext(self.fn)[0] + DEVICE_EXTENSIONS[device]
fn = File(fn=fn).fn # normalize path
if not os.path.exists(os.path.dirname(fn)):
os.makedirs(os.path.dirname(fn))
log.debug("PDF.gswrite():\n\tself.fn = %s\n\tout fn = %s" %
(self.fn, fn))
if os.path.splitext(self.fn)[-1].lower() == '.pdf':
cmd = [
gs, '-q', '-dNODISPLAY', '-c',
"(%s) (r) file runpdfbegin pdfpagecount = quit" % self.fn
]
log.debug(cmd)
out = subprocess.check_output(cmd).decode('utf-8').strip()
if out == '': out = '1'
pages = int(out)
log.debug("%d page(s)" % pages)
else:
pages = 1
if pages > 1:
# add a counter to the filename, which tells gs to create a file for every page in the input
fb, ext = os.path.splitext(fn)
n = len(re.split('.', str(pages))) - 1
counter = "-%%0%dd" % n
fn = fb + counter + ext
# remove any existing output filenames that match the pattern
for existingfn in glob(fb + '*' + ext):
log.debug("REMOVING %s" % existingfn)
os.remove(existingfn)
callargs = [
gs, '-q', '-dSAFER', '-dBATCH', '-dNOPAUSE', '-dUseCropBox',
'-sDEVICE=%s' % device,
'-r%d' % res
]
if device == 'jpeg':
callargs += ['-dJPEGQ=%d' % quality]
if 'png' in device or 'jpeg' in device or 'tiff' in device:
callargs += [
'-dTextAlphaBits=%d' % alpha,
'-dGraphicsAlphaBits=%d' % alpha
]
callargs += ['-sOutputFile=%s' % fn, self.fn]
try:
log.debug(callargs)
subprocess.check_output(callargs)
except subprocess.CalledProcessError as e:
log.error(callargs)
log.error(str(e.output, 'utf-8'))
fns = sorted(glob(re.sub(r'%\d+d', '*', fn)))
log.debug('\n\t' + '\n\t'.join(fns))
return fns
