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;
22 import android.graphics.Color;
25 public class ImageFilterBwFilter extends SimpleImageFilter {
27 public ImageFilterBwFilter() {
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;
43 native protected void nativeApplyFilter(Bitmap bitmap, int w, int h, int r, int g, int b);
46 public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) {
47 if (getParameters() == null) {
50 int w = bitmap.getWidth();
51 int h = bitmap.getHeight();
52 float[] hsv = new float[] {
53 180 + getParameters().getValue(), 1, 1
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);