ImageFilterHue.java revision 4b1e6fbdf437b7a25fb3eb18a2ed43c9ab4eccc8 
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 =
34                (FilterBasicRepresentation) super.getDefaultRepresentation();
35        representation.setName("Hue");
36        representation.setFilterClass(ImageFilterHue.class);
37        representation.setMinimum(-180);
38        representation.setMaximum(180);
39        representation.setTextId(R.string.hue);
40        representation.setButtonId(R.id.hueButton);
41        representation.setEditorId(BasicEditor.ID);
42        return representation;
43    }
44
45    native protected void nativeApplyFilter(Bitmap bitmap, int w, int h, float []matrix);
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 value = getParameters().getValue();
55        cmatrix.identity();
56        cmatrix.setHue(value);
57
58        nativeApplyFilter(bitmap, w, h, cmatrix.getMatrix());
59
60        return bitmap;
61    }
62}
63