| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // Some native low-level image processing functions. |
| |
| |
| #ifndef ANDROID_FILTERFW_JNI_IMGPROCUTIL_H |
| #define ANDROID_FILTERFW_JNI_IMGPROCUTIL_H |
| |
| inline int getIntensityFast(int R, int G, int B) { |
| return (R + R + R + B + G + G + G + G) >> 3; // see http://stackoverflow.com/a/596241 |
| } |
| |
| inline int clamp(int min, int val, int max) { |
| return val < min ? min : (val > max ? max : val); |
| // Note that for performance reasons, this function does *not* check if min < max! |
| } |
| |
| #endif // ANDROID_FILTERFW_JNI_IMGPROCUTIL_H |