ImageFilterCurves.java revision 1b1a79f1ccb6f847d017a72fa4c288b2195ffd99 
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    private Spline[] mSplines = new Spline[4];
29
30    public ImageFilterCurves() {
31        mName = "Curves";
32        reset();
33    }
34
35    @Override
36    public int getButtonId() {
37        return R.id.curvesButtonRGB;
38    }
39
40    @Override
41    public int getTextId() {
42        return R.string.curvesRGB;
43    }
44
45    @Override
46    public int getOverlayBitmaps() {
47        return R.drawable.filtershow_button_colors_curve;
48    }
49
50    @Override
51    public int getEditingViewId() {
52        return R.id.imageCurves;
53    }
54
55    @Override
56    public boolean showParameterValue() {
57        return false;
58    }
59
60    @Override
61    public boolean equals(ImageFilter filter) {
62        return same(filter);
63    }
64
65    @Override
66    public ImageFilter clone() throws CloneNotSupportedException {
67        ImageFilterCurves filter = (ImageFilterCurves) super.clone();
68        filter.mSplines = new Spline[4];
69        for (int i = 0; i < 4; i++) {
70            if (mSplines[i] != null) {
71                filter.setSpline(mSplines[i], i);
72            }
73        }
74        return filter;
75    }
76
77    @Override
78    public boolean isNil() {
79        for (int i = 0; i < 4; i++) {
80            if (mSplines[i] != null && !mSplines[i].isOriginal()) {
81                return false;
82            }
83        }
84        return true;
85    }
86
87    @Override
88    public boolean same(ImageFilter filter) {
89        boolean isCurveFilter = super.same(filter);
90        if (!isCurveFilter) {
91            return false;
92        }
93        ImageFilterCurves curve = (ImageFilterCurves) filter;
94        for (int i = 0; i < 4; i++) {
95            if (mSplines[i] != curve.mSplines[i]) {
96                return false;
97            }
98        }
99        return true;
100    }
101
102    public void populateArray(int[] array, int curveIndex) {
103        Spline spline = mSplines[curveIndex];
104        if (spline == null) {
105            return;
106        }
107        float[] curve = spline.getAppliedCurve();
108        for (int i = 0; i < 256; i++) {
109            array[i] = (int) (curve[i] * 255);
110        }
111    }
112
113    @Override
114    public Bitmap apply(Bitmap bitmap, float scaleFactor, boolean highQuality) {
115        if (!mSplines[Spline.RGB].isOriginal()) {
116            int[] rgbGradient = new int[256];
117            populateArray(rgbGradient, Spline.RGB);
118            nativeApplyGradientFilter(bitmap, bitmap.getWidth(), bitmap.getHeight(),
119                    rgbGradient, rgbGradient, rgbGradient);
120        }
121
122        int[] redGradient = null;
123        if (!mSplines[Spline.RED].isOriginal()) {
124            redGradient = new int[256];
125            populateArray(redGradient, Spline.RED);
126        }
127        int[] greenGradient = null;
128        if (!mSplines[Spline.GREEN].isOriginal()) {
129            greenGradient = new int[256];
130            populateArray(greenGradient, Spline.GREEN);
131        }
132        int[] blueGradient = null;
133        if (!mSplines[Spline.BLUE].isOriginal()) {
134            blueGradient = new int[256];
135            populateArray(blueGradient, Spline.BLUE);
136        }
137
138        nativeApplyGradientFilter(bitmap, bitmap.getWidth(), bitmap.getHeight(),
139                redGradient, greenGradient, blueGradient);
140        return bitmap;
141    }
142
143    public void setSpline(Spline spline, int splineIndex) {
144        mSplines[splineIndex] = new Spline(spline);
145    }
146
147    public Spline getSpline(int splineIndex) {
148        return mSplines[splineIndex];
149    }
150
151    @Override
152    public void reset() {
153        Spline spline = new Spline();
154
155        spline.addPoint(0.0f, 1.0f);
156        spline.addPoint(1.0f, 0.0f);
157
158        for (int i = 0; i < 4; i++) {
159            mSplines[i] = new Spline(spline);
160        }
161    }
162
163    @Override
164    public void useFilter(ImageFilter a) {
165        ImageFilterCurves c = (ImageFilterCurves) a;
166        for (int i = 0; i < 4; i++) {
167            if (c.mSplines[i] != null) {
168                setSpline(c.mSplines[i], i);
169            }
170        }
171    }
172}
173