2 * Copyright (C) 2012 The Android Open Source Project
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 package com.android.gallery3d.filtershow.filters;
19 import com.android.gallery3d.R;
21 import android.graphics.Bitmap;
23 public class ImageFilterContrast extends SimpleImageFilter {
24 private static final String SERIALIZATION_NAME = "CONTRAST";
26 public ImageFilterContrast() {
30 public FilterRepresentation getDefaultRepresentation() {
31 FilterBasicRepresentation representation =
32 (FilterBasicRepresentation) super.getDefaultRepresentation();
33 representation.setName("Contrast");
34 representation.setSerializationName(SERIALIZATION_NAME);
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;
45 native protected void nativeApplyFilter(Bitmap bitmap, int w, int h, float strength);
48 public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) {
49 if (getParameters() == null) {
52 int w = bitmap.getWidth();
53 int h = bitmap.getHeight();
54 float value = getParameters().getValue();
55 nativeApplyFilter(bitmap, w, h, value);