Add NumPy shape attribute for pictures

tivars/PIL/common.py

@@ -102,12 +102,7 @@ def encode(self, bufsize):
         """
 
         img = self._T()
-        shape = img.height, img.width
-
-        if img.pixel_type != int:
-            shape += 3,
-
-        img.load_array(np.asarray(self.im).reshape(shape).tolist())
+        img.load_array(np.asarray(self.im).reshape(img.np_shape).tolist())
         data = img.export().bytes()
 
         return len(data), 0, data

tivars/types/picture.py

@@ -177,6 +177,11 @@ class PictureEntry(SizedEntry):
     The type of a single pixel
     """
 
+    np_shape = (height, width, 3)
+    """
+    The shape of this image as a NumPy array
+    """
+
     has_color = True
     """
     Whether this picture has color
@@ -233,10 +238,11 @@ class TIMonoPicture(PictureEntry):
 
     data_width = width // 8
     data_height = height
-    data_offset = 0
 
     pil_mode = "L"
     pixel_type = int
+    np_shape = (height, width)
+
     has_color = False
 
     _type_id = 0x07
@@ -288,6 +294,7 @@ class TIPicture(PictureEntry, register=True):
 
     pil_mode = "RGB"
     pixel_type = RGB
+    np_shape = (height, width, 3)
 
     _type_id = 0x07
 
@@ -353,6 +360,7 @@ class TIImage(PictureEntry, register=True):
 
     pil_mode = "RGB"
     pixel_type = RGB
+    np_shape = (height, width, 3)
 
     leading_bytes = b'\x81'