From c60de26099532e8d8753ae39948de053c09a891d Mon Sep 17 00:00:00 2001
From: skal <pascal.massimino@gmail.com>
Date: Tue, 4 Mar 2014 00:00:40 +0100
Subject: [PATCH] ~3-4% faster lossless encoding

by re-arranging some code from SkipRepeatedPixel()

Change-Id: I6c1fd7cd9af22cd9be4234217ff67d7b94f44137
---
 src/dsp/lossless.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/src/dsp/lossless.c b/src/dsp/lossless.c
index 263f61e5..91f8e152 100644
--- a/src/dsp/lossless.c
+++ b/src/dsp/lossless.c
@@ -884,16 +884,18 @@ static WEBP_INLINE uint8_t TransformColorBlue(uint8_t green_to_blue,
 static WEBP_INLINE int SkipRepeatedPixels(const uint32_t* const argb,
                                           int ix, int xsize) {
   const uint32_t v = argb[ix];
-  if (ix >= xsize + 3) {
-    if (v == argb[ix - xsize] &&
-        argb[ix - 1] == argb[ix - xsize - 1] &&
-        argb[ix - 2] == argb[ix - xsize - 2] &&
-        argb[ix - 3] == argb[ix - xsize - 3]) {
+  if (ix >= 3) {
+    if (v == argb[ix - 3] && v == argb[ix - 2] && v == argb[ix - 1]) {
       return 1;
     }
-    return v == argb[ix - 3] && v == argb[ix - 2] && v == argb[ix - 1];
-  } else if (ix >= 3) {
-    return v == argb[ix - 3] && v == argb[ix - 2] && v == argb[ix - 1];
+    if (ix >= xsize + 3) {
+      if (v == argb[ix - xsize] &&
+          argb[ix - 3] == argb[ix - xsize - 3] &&
+          argb[ix - 2] == argb[ix - xsize - 2] &&
+          argb[ix - 1] == argb[ix - xsize - 1]) {
+        return 1;
+      }
+    }
   }
   return 0;
 }