ImageFilterCurves.java revision 116fc29a3f893813b95d7f55799d2947e09e512a 
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
21import com.android.gallery3d.R;
22import com.android.gallery3d.filtershow.ui.Spline;
23
24public class ImageFilterCurves extends ImageFilter {
25
26    private static final String LOGTAG = "ImageFilterCurves";
27    private final Spline[] mSplines = new Spline[4];
28
29    public ImageFilterCurves() {
30        mName = "Curves";
31        reset();
32    }
33
34    @Override
35    public int getButtonId() {
36        return R.id.curvesButtonRGB;
37    }
38
39    @Override
40    public int getTextId() {
41        return R.string.curvesRGB;
42    }
43
44    @Override
45    public int getOverlayBitmaps() {
46        return R.drawable.filtershow_button_colors_curve;
47    }
48
49    @Override
50    public ImageFilter clone() throws CloneNotSupportedException {
51        ImageFilterCurves filter = (ImageFilterCurves) super.clone();
52        for (int i = 0; i < 4; i++) {
53            if (mSplines[i] != null) {
54                filter.setSpline(mSplines[i], i);
55            }
56        }
57        return filter;
58    }
59
60    @Override
61    public boolean isNil() {
62        for (int i = 0; i < 4; i++) {
63            if (mSplines[i] != null && !mSplines[i].isOriginal()) {
64                return false;
65            }
66        }
67        return true;
68    }
69
70    @Override
71    public boolean same(ImageFilter filter) {
72        boolean isCurveFilter = super.same(filter);
73        if (!isCurveFilter) {
74            return false;
75        }
76        ImageFilterCurves curve = (ImageFilterCurves) filter;
77        for (int i = 0; i < 4; i++) {
78            if (mSplines[i] != curve.mSplines[i]) {
79                return false;
80            }
81        }
82        return true;
83    }
84
85    public void populateArray(int[] array, int curveIndex) {
86        Spline spline = mSplines[curveIndex];
87        if (spline == null) {
88            return;
89        }
90        float[] curve = spline.getAppliedCurve();
91        for (int i = 0; i < 256; i++) {
92            array[i] = (int) (curve[i] * 255);
93        }
94    }
95
96    @Override
97    public Bitmap apply(Bitmap bitmap, float scaleFactor, boolean highQuality) {
98        if (!mSplines[Spline.RGB].isOriginal()) {
99            int[] rgbGradient = new int[256];
100            populateArray(rgbGradient, Spline.RGB);
101            nativeApplyGradientFilter(bitmap, bitmap.getWidth(), bitmap.getHeight(),
102                    rgbGradient, rgbGradient, rgbGradient);
103        }
104
105        int[] redGradient = null;
106        if (!mSplines[Spline.RED].isOriginal()) {
107            redGradient = new int[256];
108            populateArray(redGradient, Spline.RED);
109        }
110        int[] greenGradient = null;
111        if (!mSplines[Spline.GREEN].isOriginal()) {
112            greenGradient = new int[256];
113            populateArray(greenGradient, Spline.GREEN);
114        }
115        int[] blueGradient = null;
116        if (!mSplines[Spline.BLUE].isOriginal()) {
117            blueGradient = new int[256];
118            populateArray(blueGradient, Spline.BLUE);
119        }
120
121        nativeApplyGradientFilter(bitmap, bitmap.getWidth(), bitmap.getHeight(),
122                redGradient, greenGradient, blueGradient);
123        return bitmap;
124    }
125
126    public void setSpline(Spline spline, int splineIndex) {
127        mSplines[splineIndex] = new Spline(spline);
128    }
129
130    public Spline getSpline(int splineIndex) {
131        return mSplines[splineIndex];
132    }
133
134    public void reset() {
135        Spline spline = new Spline();
136
137        spline.addPoint(0.0f, 1.0f);
138        spline.addPoint(1.0f, 0.0f);
139
140        for (int i = 0; i < 4; i++) {
141            mSplines[i] = new Spline(spline);
142        }
143    }
144}
145