Typing: improve kivy type stubs (#2681)

typings/kivy/graphics/__init__.pyi

@@ -0,0 +1,28 @@
+from .texture import FillType_Drawable, FillType_Vec, Texture
+
+
+class FillType_Shape(FillType_Drawable):
+    texture: Texture
+
+    def __init__(self,
+                 *,
+                 texture: Texture = ...,
+                 pos: FillType_Vec = ...,
+                 size: FillType_Vec = ...) -> None: ...
+
+
+class Ellipse(FillType_Shape):
+    pass
+
+
+class Color:
+    def __init__(self, r: float, g: float, b: float, a: float) -> None: ...
+
+
+class Rectangle(FillType_Shape):
+    def __init__(self,
+                 *,
+                 source: str = ...,
+                 texture: Texture = ...,
+                 pos: FillType_Vec = ...,
+                 size: FillType_Vec = ...) -> None: ...