Round image dimensions to actual next pixel.

QuLogic · QuLogic · commit 8b0df6a4c3b3 · 2016-11-16T23:20:42.000-05:00
I don't understand why there's a + 1 here, but it rounds up to the next-next pixel instead of the next pixel. This makes images extend past the end of the frame. Fixes #6773. Fixes #7350.
diff --git a/lib/matplotlib/image.py b/lib/matplotlib/image.py
@@ -341,10 +341,9 @@ def _make_image(self, A, in_bbox, out_bbox, clip_bbox, magnification=1.0,
         # means scaling the transform just slightly to account for the
         # extra subpixel.
         if (t.is_affine and round_to_pixel_border and
-            (out_width_base % 1.0 != 0.0 or
-             out_height_base % 1.0 != 0.0)):
-            out_width = int(ceil(out_width_base) + 1)
-            out_height = int(ceil(out_height_base) + 1)
+                (out_width_base % 1.0 != 0.0 or out_height_base % 1.0 != 0.0)):
+            out_width = int(ceil(out_width_base))
+            out_height = int(ceil(out_height_base))
             extra_width = (out_width - out_width_base) / out_width_base
             extra_height = (out_height - out_height_base) / out_height_base
             t += Affine2D().scale(
