1227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks/*
2227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks * Copyright (C) 2012 The Android Open Source Project
3227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks *
4227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks * Licensed under the Apache License, Version 2.0 (the "License");
5227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks * you may not use this file except in compliance with the License.
6227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks * You may obtain a copy of the License at
7227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks *
8227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks *      http://www.apache.org/licenses/LICENSE-2.0
9227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks *
10227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks * Unless required by applicable law or agreed to in writing, software
11227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks * distributed under the License is distributed on an "AS IS" BASIS,
12227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks * See the License for the specific language governing permissions and
14227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks * limitations under the License.
15227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks */
16227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks
17227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks// Some native low-level image processing functions.
18227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks
19227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks
20227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks#ifndef ANDROID_FILTERFW_JNI_IMGPROCUTIL_H
21227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks#define ANDROID_FILTERFW_JNI_IMGPROCUTIL_H
22227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks
23227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricksinline int getIntensityFast(int R, int G, int B) {
24227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks    return (R + R + R + B + G + G + G + G) >> 3;  // see http://stackoverflow.com/a/596241
25227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks}
26227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks
27227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricksinline int clamp(int min, int val, int max) {
28227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks    return val < min ? min : (val > max ? max : val);
29227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks        // Note that for performance reasons, this function does *not* check if min < max!
30227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks}
31227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks
32227b47625d7482b5b47ad0e4c70ce0a246236adeBenjamin Hendricks#endif // ANDROID_FILTERFW_JNI_IMGPROCUTIL_H
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