Added crop_surface() function.

pg.py

@@ -4,6 +4,7 @@ import pygame
 from tools import text
 from typing import Union, Callable
 
+
 pygame.init()
 
 log = text.Log()
@@ -225,6 +226,18 @@ def set_rot_point(img, pos):
     return img2, (w, h)
 
 
+def crop_surface(surface: pygame.Surface, position: tuple, size: tuple):
+    new_surface = pygame.Surface(size, flags=pygame.SRCALPHA)
+
+    x, y = position
+    x = -x
+    y = -y
+
+    new_surface.blit(surface, (x, y))
+
+    return new_surface
+
+
 def bt_from_ca(ca, function):  # bt_from_ca = button from collide able
     return Button(function, ca)