Add svgrender.py.

svgrender.py

@@ -0,0 +1,97 @@
+'''
+svgrender
+=========
+
+Calls the Inkscape command line to render svg files to png. A link to inkscape
+should be on your PATH.
+
+> svgrender svg_file scales <flags>
+
+scales:
+    One or more integers. Each integer will be the size of one output file.
+
+--destination:
+    A path to a directory where the png files should be saved. By default,
+    they go to the same folder as the svg file.
+
+--y:
+    By default, the scales control the width of the output image.
+    Pass this if you want the scales to control the height.
+
+--basename-only:
+    By default, the png filenames will have suffixes like _{scale}.
+    Pass this if you want the png to have the same name as the svg file.
+    Naturally, this only works if you're only using a single scale.
+'''
+import argparse
+import glob
+import os
+import sys
+
+from voussoirkit import betterhelp
+from voussoirkit import pathclass
+from voussoirkit import winwhich
+
+def svgrender(filepath, scales, destination, scale_suffix=True, axis='x'):
+    if isinstance(scales, int):
+        scales = [scales]
+    elif isinstance(scales, (list, tuple)):
+        pass
+    else:
+        raise TypeError(scales)
+
+    svg_path = pathclass.Path(filepath)
+    svg_path.assert_is_file()
+    if destination is None:
+        destination = svg_path.parent
+    else:
+        destination = pathclass.Path(destination)
+        destination.assert_is_directory()
+
+    if axis == 'x':
+        axis = '--export-width={s}'
+    else:
+        axis = '--export-height={s}'
+
+    for scalar in scales:
+        png_name = svg_path.replace_extension('').basename
+        if scale_suffix:
+            png_name += '_%d' % scalar
+        png_path = destination.with_child(png_name).add_extension('png')
+        dimension = axis.format(s=scalar)
+        print(png_path.absolute_path)
+
+        inkscape = winwhich.which('inkscape')
+        command = inkscape + ' "{svg}" --export-png="{png}" {dimension} --export-area-page'
+        command = command.format(svg=svg_path.absolute_path, png=png_path.absolute_path, dimension=dimension)
+        #print(command)
+        status = os.system(command)
+        if status:
+            print('Uh oh...')
+
+def svgrender_argparse(args):
+    svg_paths = glob.glob(args.svg_filepath)
+    scales = [int(x) for x in args.scales]
+    for svg_path in svg_paths:
+        svgrender(
+            svg_path,
+            scales,
+            destination=args.destination,
+            scale_suffix=args.scale_suffix,
+            axis='y' if args.y else 'x',
+        )
+
+def main(argv):
+    parser = argparse.ArgumentParser(description=__doc__)
+
+    parser.add_argument('svg_filepath')
+    parser.add_argument('scales', nargs='+')
+    parser.add_argument('--destination', nargs='?', default=None)
+    parser.add_argument('--y', dest='y', action='store_true')
+    parser.add_argument('--basename_only', '--basename-only', dest='scale_suffix', action='store_false')
+    parser.set_defaults(func=svgrender_argparse)
+
+    return betterhelp.single_main(argv, parser, __doc__)
+
+if __name__ == '__main__':
+    main(sys.argv[1:])