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Fix hang by using temp file and command line args instead of stdin

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This commit is contained in:
wiredfool 2014-01-21 23:18:24 -08:00
parent 8ce2faa8c9
commit a549e77bd8
1 changed files with 24 additions and 19 deletions
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43
PIL/EpsImagePlugin.py
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@ -67,16 +67,29 @@ def Ghostscript(tile, size, fp, scale=1):
import tempfile, os, subprocess import tempfile, os, subprocess
file = tempfile.mktemp() outfile = tempfile.mktemp()
infile = tempfile.mktemp()
with open(infile, 'wb') as f:
fp.seek(offset)
while length >0:
s = fp.read(100*1024)
if not s:
break
length = length - len(s)
f.write(s)
# Build ghostscript command # Build ghostscript command
command = ["gs", command = ["gs",
"-q", # quite mode "-q", # quiet mode
"-g%dx%d" % size, # set output geometry (pixels) "-g%dx%d" % size, # set output geometry (pixels)
"-r%d" % (72*scale), # set input DPI (dots per inch) "-r%d" % (72*scale), # set input DPI (dots per inch)
"-dNOPAUSE -dSAFER", # don't pause between pages, safe mode "-dNOPAUSE -dSAFER", # don't pause between pages, safe mode
"-sDEVICE=ppmraw", # ppm driver "-sDEVICE=ppmraw", # ppm driver
"-sOutputFile=%s" % file,# output file "-sOutputFile=%s" % outfile, # output file
"-c", "%d %d translate" % (-bbox[0], -bbox[1]),
# adjust for image origin
"-f", infile, # input file
] ]
if gs_windows_binary is not None: if gs_windows_binary is not None:
@ -87,23 +100,15 @@ def Ghostscript(tile, size, fp, scale=1):
# push data through ghostscript # push data through ghostscript
try: try:
gs = subprocess.Popen(command, stdin=subprocess.PIPE, stdout=subprocess.PIPE) gs = subprocess.Popen(command, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
# adjust for image origin
if bbox[0] != 0 or bbox[1] != 0:
gs.stdin.write(("%d %d translate\n" % (-bbox[0], -bbox[1])).encode('ascii'))
fp.seek(offset)
while length > 0:
s = fp.read(8192)
if not s:
break
length = length - len(s)
gs.stdin.write(s)
gs.stdin.close() gs.stdin.close()
status = gs.wait() status = gs.wait()
if status: if status:
raise IOError("gs failed (status %d)" % status) raise IOError("gs failed (status %d)" % status)
im = Image.core.open_ppm(file) im = Image.core.open_ppm(outfile)
finally: finally:
try: os.unlink(file) try:
os.unlink(outfile)
os.unlink(infile)
except: pass except: pass
return im return im