Fix severe slowness with very high image magnification.

mdboom · mdboom · commit 1c7a63c77536 · 2010-06-22T19:30:57.000Z
svn path=/trunk/matplotlib/; revision=8456
diff --git a/src/_image.cpp b/src/_image.cpp
@@ -353,6 +353,7 @@ Image::resize(const Py::Tuple& args, const Py::Dict& kwargs) {
   agg::rasterizer_scanline_aa<> ras;
   agg::scanline_u8 sl;
 
+  ras.clip_box(0, 0, numcols, numrows);
 
   //srcMatrix *= resizingMatrix;
   //imageMatrix *= resizingMatrix;
