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 27 public ImageFilterBwFilter() { 28 mName = "BW Filter"; 29 } 30 31 public FilterRepresentation getDefaultRepresentation() { 32 FilterBasicRepresentation representation = (FilterBasicRepresentation) super.getDefaultRepresentation(); 33 representation.setName("BW Filter"); 34 representation.setFilterClass(ImageFilterBwFilter.class); 35 representation.setMaximum(180); 36 representation.setMinimum(-180); 37 representation.setTextId(R.string.bwfilter); 38 representation.setButtonId(R.id.bwfilterButton); 39 representation.setSupportsPartialRendering(true); 40 return representation; 41 } 42 43 native protected void nativeApplyFilter(Bitmap bitmap, int w, int h, int r, int g, int b); 44 45 @Override 46 public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) { 47 if (getParameters() == null) { 48 return bitmap; 49 } 50 int w = bitmap.getWidth(); 51 int h = bitmap.getHeight(); 52 float[] hsv = new float[] { 53 180 + getParameters().getValue(), 1, 1 54 }; 55 int rgb = Color.HSVToColor(hsv); 56 int r = 0xFF & (rgb >> 16); 57 int g = 0xFF & (rgb >> 8); 58 int b = 0xFF & (rgb >> 0); 59 nativeApplyFilter(bitmap, w, h, r, g, b); 60 return bitmap; 61 } 62 } 63
