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 23 public class ImageFilterContrast extends SimpleImageFilter { 24 private static final String SERIALIZATION_NAME = "CONTRAST"; 25 26 public ImageFilterContrast() { 27 mName = "Contrast"; 28 } 29 30 public FilterRepresentation getDefaultRepresentation() { 31 FilterBasicRepresentation representation = 32 (FilterBasicRepresentation) super.getDefaultRepresentation(); 33 representation.setName("Contrast"); 34 representation.setSerializationName(SERIALIZATION_NAME); 35 36 representation.setFilterClass(ImageFilterContrast.class); 37 representation.setTextId(R.string.contrast); 38 representation.setMinimum(-100); 39 representation.setMaximum(100); 40 representation.setDefaultValue(0); 41 representation.setSupportsPartialRendering(true); 42 return representation; 43 } 44 45 native protected void nativeApplyFilter(Bitmap bitmap, int w, int h, float strength); 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 value = getParameters().getValue(); 55 nativeApplyFilter(bitmap, w, h, value); 56 return bitmap; 57 } 58 } 59
