48 lines
1.2 KiB
Python
48 lines
1.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
|
|
import sys
|
|
import ctypes
|
|
from ctypes.util import find_library
|
|
|
|
import ghostscript
|
|
|
|
|
|
def installed_posix():
|
|
library = find_library("gs")
|
|
return library is not None
|
|
|
|
|
|
def installed_windows():
|
|
library = find_library(
|
|
"".join(("gsdll", str(ctypes.sizeof(ctypes.c_voidp) * 8), ".dll"))
|
|
)
|
|
return library is not None
|
|
|
|
|
|
class GhostscriptBackend(object):
|
|
def installed(self):
|
|
if sys.platform in ["linux", "darwin"]:
|
|
return installed_posix()
|
|
elif sys.platform == "win32":
|
|
return installed_windows()
|
|
else:
|
|
return installed_posix()
|
|
|
|
def convert(self, pdf_path, png_path, resolution=300):
|
|
if not self.installed():
|
|
raise OSError(
|
|
"Ghostscript is not installed. Please install it using the instructions"
|
|
"here: https://camelot-py.readthedocs.io/en/master/user/install-deps.html"
|
|
)
|
|
|
|
gs_command = [
|
|
"gs",
|
|
"-q",
|
|
"-sDEVICE=png16m",
|
|
"-o",
|
|
png_path,
|
|
f"-r{resolution}",
|
|
pdf_path,
|
|
]
|
|
ghostscript.Ghostscript(*gs_command)
|