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(ImageFilter, nativeApplyGradientFilter, jobject bitmap, jint width, jint height, 20 jintArray redGradient, jintArray greenGradient, jintArray blueGradient) 21 { 22 char* destination = 0; 23 jint* redGradientArray = 0; 24 jint* greenGradientArray = 0; 25 jint* blueGradientArray = 0; 26 if (redGradient) 27 redGradientArray = (*env)->GetIntArrayElements(env, redGradient, NULL); 28 if (greenGradient) 29 greenGradientArray = (*env)->GetIntArrayElements(env, greenGradient, NULL); 30 if (blueGradient) 31 blueGradientArray = (*env)->GetIntArrayElements(env, blueGradient, NULL); 32 33 AndroidBitmap_lockPixels(env, bitmap, (void**) &destination); 34 int i; 35 int len = width * height * 4; 36 for (i = 0; i < len; i+=4) 37 { 38 if (redGradient) 39 { 40 int r = destination[RED]; 41 r = redGradientArray[r]; 42 destination[RED] = r; 43 } 44 if (greenGradient) 45 { 46 int g = destination[GREEN]; 47 g = greenGradientArray[g]; 48 destination[GREEN] = g; 49 } 50 if (blueGradient) 51 { 52 int b = destination[BLUE]; 53 b = blueGradientArray[b]; 54 destination[BLUE] = b; 55 } 56 } 57 if (redGradient) 58 (*env)->ReleaseIntArrayElements(env, redGradient, redGradientArray, 0); 59 if (greenGradient) 60 (*env)->ReleaseIntArrayElements(env, greenGradient, greenGradientArray, 0); 61 if (blueGradient) 62 (*env)->ReleaseIntArrayElements(env, blueGradient, blueGradientArray, 0); 63 AndroidBitmap_unlockPixels(env, bitmap); 64 } 65 66
