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ref: 701cd045b36f9be1b0b8cfb74d9c191cb5813e98
parent: 751d7a25244d2b62352b57e298c409a8a419bcb2
author: Simon Tatham <anakin@pobox.com>
date: Wed May 11 09:03:17 EDT 2005

Completion flashes were occasionally failing to be cleaned up if a
subsequent move animation began during them. Tracked this to
overenthusiastic use of clip() and fixed it.

[originally from svn r5766]

--- a/twiddle.c
+++ b/twiddle.c
@@ -693,6 +693,16 @@
     int coords[8];
     char str[40];
 
+    /*
+     * If we've been passed a rotation region but we're drawing a
+     * tile which is outside it, we must draw it normally. This can
+     * occur if we're cleaning up after a completion flash while a
+     * new move is also being made.
+     */
+    if (rot && (x < rot->cx || y < rot->cy ||
+                x >= rot->cx+rot->cw || y > rot->cy+rot->ch))
+        rot = NULL;
+
     if (rot)
 	clip(fe, rot->cx, rot->cy, rot->cw, rot->ch);