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;
20import com.android.gallery3d.filtershow.editors.BasicEditor;
21
22import android.graphics.Bitmap;
23
24public class ImageFilterHue extends SimpleImageFilter {
25    private static final String SERIALIZATION_NAME = "HUE";
26    private ColorSpaceMatrix cmatrix = null;
27
28    public ImageFilterHue() {
29        mName = "Hue";
30        cmatrix = new ColorSpaceMatrix();
31    }
32
33    public FilterRepresentation getDefaultRepresentation() {
34        FilterBasicRepresentation representation =
35                (FilterBasicRepresentation) super.getDefaultRepresentation();
36        representation.setName("Hue");
37        representation.setSerializationName(SERIALIZATION_NAME);
38        representation.setFilterClass(ImageFilterHue.class);
39        representation.setMinimum(-180);
40        representation.setMaximum(180);
41        representation.setTextId(R.string.hue);
42        representation.setEditorId(BasicEditor.ID);
43        representation.setSupportsPartialRendering(true);
44        return representation;
45    }
46
47    native protected void nativeApplyFilter(Bitmap bitmap, int w, int h, float []matrix);
48
49    @Override
50    public Bitmap apply(Bitmap bitmap, float scaleFactor, int quality) {
51        if (getParameters() == null) {
52            return bitmap;
53        }
54        int w = bitmap.getWidth();
55        int h = bitmap.getHeight();
56        float value = getParameters().getValue();
57        cmatrix.identity();
58        cmatrix.setHue(value);
59
60        nativeApplyFilter(bitmap, w, h, cmatrix.getMatrix());
61
62        return bitmap;
63    }
64}
65