issue a warning when _image_skew_coordinate is set for backends that do not support an affine transform of images

leejjoon · leejjoon · commit 48ff965f4277 · 2010-02-08T16:54:31.000Z
svn path=/trunk/matplotlib/; revision=8119
diff --git a/lib/matplotlib/image.py b/lib/matplotlib/image.py
@@ -305,6 +305,9 @@ def draw(self, renderer, *args, **kwargs):
         if self._check_unsampled_image(renderer):
             self._draw_unsampled_image(renderer, gc)
         else:
+            if self._image_skew_coordinate is not None:
+                warnings.warn("Image will not be shown correctly with this backend.")
+
             im = self.make_image(renderer.get_image_magnification())
             if im is None:
                 return
