ImageFilterHue.java revision a9f280f938b5fd5891c5cfe0999f8f1d4945d7a1 
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 android.graphics.Bitmap;
20
21public class ImageFilterHue extends ImageFilter {
22    private ColorSpaceMatrix cmatrix = null;
23
24    public ImageFilterHue() {
25        mName = "Hue";
26        cmatrix = new ColorSpaceMatrix();
27        mMaxParameter = 180;
28        mMinParameter = -180;
29    }
30
31    @Override
32    public ImageFilter clone() throws CloneNotSupportedException {
33        ImageFilterHue filter = (ImageFilterHue) super.clone();
34        filter.cmatrix = new ColorSpaceMatrix(cmatrix);
35        return filter;
36    }
37
38    native protected void nativeApplyFilter(Bitmap bitmap, int w, int h, float []matrix);
39
40    @Override
41    public Bitmap apply(Bitmap bitmap, float scaleFactor, boolean highQuality) {
42        int w = bitmap.getWidth();
43        int h = bitmap.getHeight();
44        float p = mParameter;
45        float value = p;
46        cmatrix.identity();
47        cmatrix.setHue(value);
48
49        nativeApplyFilter(bitmap, w, h, cmatrix.getMatrix());
50
51        return bitmap;
52    }
53}
54