ImageFilterCurves.java revision 6900cad45d240c9a54b92991538b6a33652e766c 
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;
20import android.util.Log;
21
22import com.android.gallery3d.R;
23import com.android.gallery3d.filtershow.ui.Spline;
24
25public class ImageFilterCurves extends ImageFilter {
26
27    private static final String LOGTAG = "ImageFilterCurves";
28    FilterCurvesRepresentation mParameters = new FilterCurvesRepresentation();
29
30    @Override
31    public FilterRepresentation getDefaultRepresentation() {
32        return new FilterCurvesRepresentation();
33    }
34
35    @Override
36    public void useRepresentation(FilterRepresentation representation) {
37        FilterCurvesRepresentation parameters = (FilterCurvesRepresentation) representation;
38        mParameters = parameters;
39    }
40
41    public ImageFilterCurves() {
42        mName = "Curves";
43        reset();
44    }
45
46    public void populateArray(int[] array, int curveIndex) {
47        Spline spline = mParameters.getSpline(curveIndex);
48        if (spline == null) {
49            return;
50        }
51        float[] curve = spline.getAppliedCurve();
52        for (int i = 0; i < 256; i++) {
53            array[i] = (int) (curve[i] * 255);
54        }
55    }
56
57    @Override
58    public Bitmap apply(Bitmap bitmap, float scaleFactor, boolean highQuality) {
59        if (!mParameters.getSpline(Spline.RGB).isOriginal()) {
60            int[] rgbGradient = new int[256];
61            populateArray(rgbGradient, Spline.RGB);
62            nativeApplyGradientFilter(bitmap, bitmap.getWidth(), bitmap.getHeight(),
63                    rgbGradient, rgbGradient, rgbGradient);
64        }
65
66        int[] redGradient = null;
67        if (!mParameters.getSpline(Spline.RED).isOriginal()) {
68            redGradient = new int[256];
69            populateArray(redGradient, Spline.RED);
70        }
71        int[] greenGradient = null;
72        if (!mParameters.getSpline(Spline.GREEN).isOriginal()) {
73            greenGradient = new int[256];
74            populateArray(greenGradient, Spline.GREEN);
75        }
76        int[] blueGradient = null;
77        if (!mParameters.getSpline(Spline.BLUE).isOriginal()) {
78            blueGradient = new int[256];
79            populateArray(blueGradient, Spline.BLUE);
80        }
81
82        nativeApplyGradientFilter(bitmap, bitmap.getWidth(), bitmap.getHeight(),
83                redGradient, greenGradient, blueGradient);
84        return bitmap;
85    }
86
87    public void setSpline(Spline spline, int splineIndex) {
88        mParameters.setSpline(splineIndex, new Spline(spline));
89    }
90
91    public Spline getSpline(int splineIndex) {
92        return mParameters.getSpline(splineIndex);
93    }
94
95    public void reset() {
96        Spline spline = new Spline();
97
98        spline.addPoint(0.0f, 1.0f);
99        spline.addPoint(1.0f, 0.0f);
100
101        for (int i = 0; i < 4; i++) {
102            mParameters.setSpline(i, new Spline(spline));
103        }
104    }
105
106    public void useFilter(ImageFilter a) {
107        ImageFilterCurves c = (ImageFilterCurves) a;
108        for (int i = 0; i < 4; i++) {
109            if (c.mParameters.getSpline(i) != null) {
110                setSpline(c.mParameters.getSpline(i), i);
111            }
112        }
113    }
114}
115