/*
 * 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 <math.h>
#include "filters.h"

 void JNIFUNCF(ImageFilterShadows, nativeApplyFilter, jobject bitmap, jint width, jint height, jshortArray vlut)
 {
     char* destination = 0;
     AndroidBitmap_lockPixels(env, bitmap, (void**) &destination);
     unsigned char * rgb = (unsigned char * )destination;
     int i;
     int len = width * height * 4;
     short* lut = (*env)->GetShortArrayElements(env, vlut,0);
     unsigned short * hsv = (unsigned short *)malloc(3*sizeof(short));
     for (i = 0; i < len; i+=4)
     {
       rgb2hsv(rgb,i,hsv,0);
       hsv[0] = lut[hsv[0]];
       hsv2rgb(hsv,0, rgb,i);
     }

     (*env)->ReleaseShortArrayElements(env, vlut, lut, 0);
     free(hsv);
     AndroidBitmap_unlockPixels(env, bitmap);
 }