Add pdftopng

camelot/parsers/lattice.py

@@ -208,17 +208,10 @@ class Lattice(BaseParser):
         return t
 
     def _generate_image(self):
-        from ..ext.ghostscript import Ghostscript
+        from pdftopng import pdftopng
 
         self.imagename = "".join([self.rootname, ".png"])
-        gs_call = "-q -sDEVICE=png16m -o {} -r{} {}".format(
-            self.imagename, self.resolution, self.filename
-        )
-        gs_call = gs_call.encode().split()
-        null = open(os.devnull, "wb")
-        with Ghostscript(*gs_call, stdout=null) as gs:
-            pass
-        null.close()
+        pdftopng.convert(pdf_path=self.filename, png_path=self.rootname)
 
     def _generate_table_bbox(self):
         def scale_areas(areas):

setup.py

@@ -24,7 +24,10 @@ requires = [
     "tabulate>=0.8.9",
 ]
 
-cv_requires = ["opencv-python>=3.4.2.17"]
+base_requires = [
+    'opencv-python>=3.4.2.17',
+    'pdftopng>=0.1.0'
+]
 
 plot_requires = [
     "matplotlib>=2.2.3",
@@ -40,44 +43,41 @@ dev_requires = [
     "sphinx-autobuild>=2021.3.14",
 ]
 
-all_requires = cv_requires + plot_requires
+all_requires = base_requires + plot_requires
 dev_requires = dev_requires + all_requires
 
 
 def setup_package():
-    metadata = dict(
-        name=about["__title__"],
-        version=about["__version__"],
-        description=about["__description__"],
-        long_description=readme,
-        long_description_content_type="text/markdown",
-        url=about["__url__"],
-        author=about["__author__"],
-        author_email=about["__author_email__"],
-        license=about["__license__"],
-        packages=find_packages(exclude=("tests",)),
-        install_requires=requires,
-        extras_require={
-            "all": all_requires,
-            "cv": cv_requires,
-            "dev": dev_requires,
-            "plot": plot_requires,
-        },
-        entry_points={
-            "console_scripts": [
-                "camelot = camelot.cli:cli",
-            ],
-        },
-        classifiers=[
-            # Trove classifiers
-            # Full list: https://pypi.python.org/pypi?%3Aaction=list_classifiers
-            "License :: OSI Approved :: MIT License",
-            "Programming Language :: Python :: 3.6",
-            "Programming Language :: Python :: 3.7",
-            "Programming Language :: Python :: 3.8",
-            "Programming Language :: Python :: 3.9",
-        ],
-    )
+    metadata = dict(name=about['__title__'],
+                    version=about['__version__'],
+                    description=about['__description__'],
+                    long_description=readme,
+                    long_description_content_type="text/markdown",
+                    url=about['__url__'],
+                    author=about['__author__'],
+                    author_email=about['__author_email__'],
+                    license=about['__license__'],
+                    packages=find_packages(exclude=('tests',)),
+                    install_requires=requires,
+                    extras_require={
+                        'all': all_requires,
+                        'base': base_requires,
+                        'dev': dev_requires,
+                        'plot': plot_requires
+                    },
+                    entry_points={
+                        'console_scripts': [
+                            'camelot = camelot.cli:cli',
+                        ],
+                    },
+                    classifiers=[
+                        # Trove classifiers
+                        # Full list: https://pypi.python.org/pypi?%3Aaction=list_classifiers
+                        'License :: OSI Approved :: MIT License',
+                        'Programming Language :: Python :: 3.6',
+                        'Programming Language :: Python :: 3.7',
+                        'Programming Language :: Python :: 3.8'
+                    ])
 
     try:
         from setuptools import setup