| /* |
| * 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. |
| */ |
| |
| #include "filters.h" |
| |
| void JNIFUNCF(ImageFilterExposure, nativeApplyFilter, jobject bitmap, jint width, jint height, jfloat bright) |
| { |
| char* destination = 0; |
| AndroidBitmap_lockPixels(env, bitmap, (void**) &destination); |
| unsigned char * rgb = (unsigned char * )destination; |
| int i; |
| int len = width * height * 4; |
| |
| int m = (255-bright); |
| |
| for (i = 0; i < len; i+=4) |
| { |
| rgb[RED] = clamp((255*(rgb[RED]))/m); |
| rgb[GREEN] = clamp((255*(rgb[GREEN]))/m); |
| rgb[BLUE] = clamp((255*(rgb[BLUE]))/m); |
| } |
| AndroidBitmap_unlockPixels(env, bitmap); |
| } |
| |