fix(visualizer): draw fill before line

signwriting/visualizer/test_visualize.py

@@ -19,6 +19,16 @@ def test_image_fsw(self):
         self.assertEqual(reference_image.size, image.size)
         assert_array_equal(np.array(image), np.array(reference_image))
 
+    def test_image_without_antialiasing(self):
+        fsw = "M528x526S1ce40506x474S1ce48472x474S22a04507x511S22a14480x510"
+        image = signwriting_to_image(fsw, antialiasing=False)
+
+        assets_path = Path(__file__).parent / "test_assets" / f"{fsw}.png"
+        reference_image = Image.open(assets_path)
+
+        self.assertEqual(reference_image.size, image.size)
+        assert_array_equal(np.array(image), np.array(reference_image))
+
     def test_image_invalid_fsw(self):
         fsw = "S20555"
         image = signwriting_to_image(fsw)

signwriting/visualizer/visualize.py

@@ -13,7 +13,8 @@ def get_font(font_name: str):
     return ImageFont.truetype(str(font_path), 30)
 
 
-def signwriting_to_image(fsw: str) -> Image:
+# pylint: disable=too-many-locals
+def signwriting_to_image(fsw: str, antialiasing=True) -> Image:
     sign = fsw_to_sign(fsw)
     if len(sign['symbols']) == 0:
         return Image.new('RGBA', (1, 1), (0, 0, 0, 0))
@@ -24,15 +25,16 @@ def signwriting_to_image(fsw: str) -> Image:
     max_x, max_y, = sign["box"]["position"]
     img = Image.new('RGBA', (max_x - min_x, max_y - min_y), (255, 255, 255, 0))
     draw = ImageDraw.Draw(img)
+    draw.fontmode = 'L' if antialiasing else '1'
 
-    line_font = get_font('SuttonSignWritingLine')
     fill_font = get_font('SuttonSignWritingFill')
+    line_font = get_font('SuttonSignWritingLine')
 
     for symbol in sign['symbols']:
         x, y = symbol["position"]
         x, y = x - min_x, y - min_y
         symbol_id = key2id(symbol["symbol"])
-        draw.text((x, y), symbol_line(symbol_id), font=line_font, fill=(0, 0, 0))
         draw.text((x, y), symbol_fill(symbol_id), font=fill_font, fill=(255, 255, 255))
+        draw.text((x, y), symbol_line(symbol_id), font=line_font, fill=(0, 0, 0))
 
     return img