1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17// Some native low-level image processing functions.
18
19
20#ifndef ANDROID_FILTERFW_JNI_IMGPROCUTIL_H
21#define ANDROID_FILTERFW_JNI_IMGPROCUTIL_H
22
23inline int getIntensityFast(int R, int G, int B) {
24    return (R + R + R + B + G + G + G + G) >> 3;  // see http://stackoverflow.com/a/596241
25}
26
27inline int clamp(int min, int val, int max) {
28    return val < min ? min : (val > max ? max : val);
29        // Note that for performance reasons, this function does *not* check if min < max!
30}
31
32#endif // ANDROID_FILTERFW_JNI_IMGPROCUTIL_H
33