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
17package com.android.gallery3d.filtershow.filters;
18
19import com.android.gallery3d.R;
20
21import android.graphics.Bitmap;
22import android.graphics.Color;
23
24
25public 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