Add rounded edges to cards

main.py

@@ -11,7 +11,7 @@ def main():
     special_cards = ['W', 'N']
 
     for color in colors:
-        for i in range(1, 4):
+        for i in range(1, 3):
             draw_card_face(color, i)
 
     for sign in special_cards:
@@ -25,6 +25,8 @@ def draw_card_face(color, symbol):
         img = draw_symbol(img, symbol, color, 90, 130)
         img = draw_symbol(img, symbol, color, int(img.width - 100), 130)
         img = draw_rune(img, color)
+        
+        draw_mask(img, color)
         save_img(img, color, symbol)
 
 def draw_symbol(img, symbol, color, x, y):
@@ -46,6 +48,23 @@ def draw_rune(img, color):
                      top=int((img.height - rune.height) / 2))
     return img
 
+def draw_mask(img, color):
+    # Mask with a pink outline. This pink outline is this replaced 
+    # with a transparency layer before being returned
+    with Image(width=img.width, height=img.height, background=Color("#c300ff")) as mask:
+        with Drawing() as ctx:
+            ctx.fill_color = Color("black")
+            ctx.rectangle(left=0,
+                        top=0,
+                        width=mask.width,
+                        height=mask.height,
+                        radius=mask.width * 0.075)
+            ctx(mask)
+    
+        img.composite_channel('all_channels', mask, 'screen')
+        img.opaque_paint(target=Color("#c300ff"), fill=Color("transparent"), fuzz=0.30*img.quantum_range)
+    return img
+    
 def save_img(img, color, symbol):
     img.save(filename='output/card-{}-{}.png'.format(color, symbol))