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