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 <math.h> 18 #include <stdlib.h> 19 20 #include "filters.h" 21 22 void JNIFUNCF(ImageFilterShadows, nativeApplyFilter, jobject bitmap, jint width, jint height, float scale){ 23 double shadowFilterMap[] = { 24 -0.00591, 0.0001, 25 1.16488, 0.01668, 26 -0.18027, -0.06791, 27 -0.12625, 0.09001, 28 0.15065, -0.03897 29 }; 30 31 char* destination = 0; 32 AndroidBitmap_lockPixels(env, bitmap, (void**) &destination); 33 unsigned char * rgb = (unsigned char * )destination; 34 int i; 35 double s = (scale>=0)?scale:scale/5; 36 int len = width * height * 4; 37 38 double *poly = (double *) malloc(5*sizeof(double)); 39 for (i = 0; i < 5; i++) { 40 poly[i] = fastevalPoly(shadowFilterMap+i*2,2 , s); 41 } 42 43 unsigned short * hsv = (unsigned short *)malloc(3*sizeof(short)); 44 45 for (i = 0; i < len; i+=4) 46 { 47 rgb2hsv(rgb,i,hsv,0); 48 49 double v = (fastevalPoly(poly,5,hsv[0]/4080.)*4080); 50 if (v>4080) v = 4080; 51 hsv[0] = (unsigned short) ((v>0)?v:0); 52 53 hsv2rgb(hsv,0, rgb,i); 54 } 55 56 free(poly); 57 free(hsv); 58 AndroidBitmap_unlockPixels(env, bitmap); 59 } 60
