added lib/extract_emoji.py

lib/extract_emoji.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+#vim: fileencoding=utf-8
+
+"""
+
+At the moment, Pillow library does not support colorful emojis,
+that is why emojis must be extracted to external files first,
+and then they must be handled as usual graphical objects
+and not as text.
+
+The files are extracted using Imagemagick.
+
+Usage:
+
+    ve/bi/python lib/extract_emoji.py
+"""
+
+import subprocess
+
+EMOJIS = [
+    "✨",
+    "☁️",
+    "🌫",
+    "🌧",
+    "🌧",
+    "❄️",
+    "❄️",
+    "🌦",
+    "🌦",
+    "🌧",
+    "🌧",
+    "🌨",
+    "🌨",
+    "⛅️",
+    "☀️",
+    "🌩",
+    "⛈",
+    "⛈",
+    "☁️",
+    "🌑", "🌒", "🌓", "🌔", "🌕", "🌖", "🌗", "🌘"
+]
+
+def extract_emojis_to_directory(dirname):
+    """
+    Extract emoji from an emoji font, to separate files.
+    """
+
+    emoji_font = "Noto Color Emoji"
+    emoji_size = 30
+
+    for emoji in EMOJIS:
+        filename = "%s/%s.png" % (dirname, emoji)
+        convert_string = [
+            "convert", "-background", "black", "-size", "%sx%s" % (emoji_size, emoji_size),
+            "-set", "colorspace", "sRGB",
+            "pango:<span font=\"%s\" size=\"20000\">%s</span>" % (emoji_font, emoji),
+            filename
+        ]
+        subprocess.Popen(convert_string)
+
+if __name__ == '__main__':
+    extract_emojis_to_directory("share/emoji")