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 package com.android.gallery3d.filtershow.filters; 18 19 import com.android.gallery3d.R; 20 21 import android.graphics.Bitmap; 22 import android.graphics.Color; 23 24 25 public class ImageFilterBwFilter extends SimpleImageFilter { 26 private static final String SERIALIZATION_NAME = "BWFILTER"; 27 28 public ImageFilterBwFilter() { 29 mName = "BW Filter"; 30 } 31 32 public FilterRepresentation getDefaultRepresentation() { 33 FilterBasicRepresentation representation = (FilterBasicRepresentation) super.getDefaultRepresentation(); 34 representation.setName("BW Filter"); 35 representation.setSerializationName(SERIALIZATION_NAME); 36 37 representation.setFilterClass(ImageFilterBwFilter.class); 38 representation.setMaximum(180); 39 representation.setMinimum(-180); 40 representation.setTextId(R.string.bwfilter); 41 representation.setSupportsPartialRendering(true); 42 return representation; 43 } 44 45 native protected void nativeApplyFilter(Bitmap bitmap, int w, int h, int r, int g, int b); 46 47 @Override 48 public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) { 49 if (getParameters() == null) { 50 return bitmap; 51 } 52 int w = bitmap.getWidth(); 53 int h = bitmap.getHeight(); 54 float[] hsv = new float[] { 55 180 + getParameters().getValue(), 1, 1 56 }; 57 int rgb = Color.HSVToColor(hsv); 58 int r = 0xFF & (rgb >> 16); 59 int g = 0xFF & (rgb >> 8); 60 int b = 0xFF & (rgb >> 0); 61 nativeApplyFilter(bitmap, w, h, r, g, b); 62 return bitmap; 63 } 64 } 65
