ImageFilterHue.java revision 856acb652fad51d650723a890cac08c536363fcd 
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 ColorSpaceMatrix cmatrix = null;
26
27    public ImageFilterHue() {
28        mName = "Hue";
29        cmatrix = new ColorSpaceMatrix();
30    }
31
32    public FilterRepresentation getDefaultRepresentation() {
33        FilterBasicRepresentation representation = (FilterBasicRepresentation) super.getDefaultRepresentation();
34        representation.setName("Hue");
35        representation.setFilterClass(ImageFilterHue.class);
36        representation.setMinimum(-180);
37        representation.setMaximum(180);
38        return representation;
39    }
40
41    @Override
42    public int getButtonId() {
43        return R.id.hueButton;
44    }
45
46    @Override
47    public int getTextId() {
48        return R.string.hue;
49    }
50
51    @Override
52    public int getEditingViewId() {
53        return BasicEditor.ID;
54    }
55
56    native protected void nativeApplyFilter(Bitmap bitmap, int w, int h, float []matrix);
57
58    @Override
59    public Bitmap apply(Bitmap bitmap, float scaleFactor, boolean highQuality) {
60        if (getParameters() == null) {
61            return bitmap;
62        }
63        int w = bitmap.getWidth();
64        int h = bitmap.getHeight();
65        float value = getParameters().getValue();
66        cmatrix.identity();
67        cmatrix.setHue(value);
68
69        nativeApplyFilter(bitmap, w, h, cmatrix.getMatrix());
70
71        return bitmap;
72    }
73}
74