Add fonts preview generator

Author: mathoudebine

res/fonts/font-preview.py

@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+# turing-smart-screen-python - a Python system monitor and library for USB-C displays like Turing Smart Screen or XuanFang
+# https://github.com/mathoudebine/turing-smart-screen-python/
+
+# Copyright (C) 2021-2023  Matthieu Houdebine (mathoudebine)
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+# This file generate PNG previews for available fonts
+
+import os
+import sys
+
+MIN_PYTHON = (3, 9)
+if sys.version_info < MIN_PYTHON:
+    print("[ERROR] Python %s.%s or later is required." % MIN_PYTHON)
+    try:
+        sys.exit(0)
+    except:
+        os._exit(0)
+
+from PIL import Image, ImageDraw, ImageFont
+import math
+from pathlib import Path
+
+FONTS_DIR = str(Path(__file__).parent.resolve()) + "/"
+
+
+def generate_preview(font_dir: str, font_filename: str, text: str, font_size: int = 40,
+                     font_color: tuple[int, int, int] = (0, 0, 0),
+                     background_color: tuple[int, int, int] = (255, 255, 255)):
+    font = os.path.join(font_dir, font_filename)
+
+    ttfont = ImageFont.truetype(font, font_size)
+    text_image = Image.new(
+        'RGB',
+        (1000, 1000),
+        background_color
+    )
+    d = ImageDraw.Draw(text_image)
+    left, top, right, bottom = d.textbbox((0, 0), text, font=ttfont)
+
+    # textbbox may return float values, which is not good for the bitmap operations below.
+    # Let's extend the bounding box to the next whole pixel in all directions
+    left, top = math.floor(left), math.floor(top)
+    right, bottom = math.ceil(right), math.ceil(bottom)
+
+    d.text((0, 0), text, font=ttfont, fill=font_color)
+
+    text_image = text_image.crop(box=(left, top, right, bottom))
+
+    text_image.save(os.path.join(font_dir, font_filename[:-4] + "_preview.png"), "PNG")
+
+
+TEXT = ("50%  9876M  Core i5-4321\n"
+        "ABCDEFGHIJKLMNOPQRSTUVWXYZ\n"
+        "abcdefghijklmnopqrstuvwxyz\n"
+        "0123456789 %;,:?!/-_()[]{}<>=+*#$")
+
+fonts = []
+for dir in os.listdir(FONTS_DIR):
+    font_dir = os.path.join(FONTS_DIR, dir)
+    if os.path.isdir(font_dir):
+        for font in os.listdir(font_dir):
+            font_file = os.path.join(font_dir, font)
+            if os.path.isfile(font_file) and font_file.endswith(".ttf"):
+                print(f"Found font {dir}/{font}")
+                generate_preview(font_dir, font, "40%", font_size=60)