From ac9b96c076f1d62f34fbc9182d1aca46d2f0b75a Mon Sep 17 00:00:00 2001
From: "fbarchard@google.com"
 <fbarchard@google.com@16f28f9a-4ce2-e073-06de-1de4eb20be90>
Date: Fri, 3 Jan 2014 00:51:12 +0000
Subject: [PATCH] Work around for 1 pixel destination BUG=302 TEST=*1x1*
 R=tpsiaki@google.com

Review URL: https://webrtc-codereview.appspot.com/6519004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@943 16f28f9a-4ce2-e073-06de-1de4eb20be90
---
 source/scale_common.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/source/scale_common.cc b/source/scale_common.cc
index 6cc5ff8cb..5c760b964 100644
--- a/source/scale_common.cc
+++ b/source/scale_common.cc
@@ -634,6 +634,13 @@ void ScaleSlope(int src_width, int src_height,
   assert(src_height != 0);
   assert(dst_width > 0);
   assert(dst_height > 0);
+  // Check for 1 pixel and avoid FixedDiv overflow.
+  if (dst_width == 1) {
+    dst_width = src_width;
+  }
+  if (dst_height == 1) {
+    dst_height = src_height;
+  }
   if (filtering == kFilterBox) {
     // Scale step for point sampling duplicates all pixels equally.
     *dx = FixedDiv(Abs(src_width), dst_width);