From e4f998bbf493636cf93554fbb2a3d90186e65b5f Mon Sep 17 00:00:00 2001
From: John Hoford <hoford@google.com>
Date: Wed, 20 Feb 2013 17:50:42 -0800
Subject: add highlight filter

Change-Id: I2e59e09fbc80172b9dfe27b3ce8ff2f1e24c5872
---
 jni/filters/contrast.c | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'jni/filters/contrast.c')

diff --git a/jni/filters/contrast.c b/jni/filters/contrast.c
index 6c1b976cf..b04e9364e 100644
--- a/jni/filters/contrast.c
+++ b/jni/filters/contrast.c
@@ -27,6 +27,15 @@ unsigned char clamp(int c)
     return  (unsigned char) c;
 }
 
+int clampMax(int c,int max)
+{
+    c &= ~(c >> 31);
+    c -= max;
+    c &= (c >> 31);
+    c += max;
+    return  c;
+}
+
 void JNIFUNCF(ImageFilterContrast, nativeApplyFilter, jobject bitmap, jint width, jint height, jfloat bright)
 {
     char* destination = 0;
-- 
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