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 #include "filters.h" 18 19 void JNIFUNCF(ImageFilterNegative, nativeApplyFilter, jobject bitmap, jint width, jint height) 20 { 21 char* destination = 0; 22 AndroidBitmap_lockPixels(env, bitmap, (void**) &destination); 23 24 int tot_len = height * width * 4; 25 int i; 26 char * dst = destination; 27 for (i = 0; i < tot_len; i+=4) { 28 dst[RED] = 255 - dst[RED]; 29 dst[GREEN] = 255 - dst[GREEN]; 30 dst[BLUE] = 255 - dst[BLUE]; 31 } 32 AndroidBitmap_unlockPixels(env, bitmap); 33 } 34
