ImageFilterCurves.java revision 856acb652fad51d650723a890cac08c536363fcd 
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 boolean hasDefaultRepresentation() {
32        return true;
33    }
34
35    @Override
36    public FilterRepresentation getDefaultRepresentation() {
37        FilterCurvesRepresentation representation = new FilterCurvesRepresentation();
38        representation.setName("Draw");
39        representation.setFilterClass(ImageFilterCurves.class);
40        return representation;
41    }
42
43    @Override
44    public void useRepresentation(FilterRepresentation representation) {
45        FilterCurvesRepresentation parameters = (FilterCurvesRepresentation) representation;
46        mParameters = parameters;
47    }
48
49    public ImageFilterCurves() {
50        mName = "Curves";
51        reset();
52    }
53
54    @Override
55    public int getButtonId() {
56        return R.id.curvesButtonRGB;
57    }
58
59    @Override
60    public int getTextId() {
61        return R.string.curvesRGB;
62    }
63
64    @Override
65    public int getOverlayBitmaps() {
66        return R.drawable.filtershow_button_colors_curve;
67    }
68
69    @Override
70    public int getEditingViewId() {
71        return R.id.imageCurves;
72    }
73
74    @Override
75    public boolean showParameterValue() {
76        return false;
77    }
78
79    public void populateArray(int[] array, int curveIndex) {
80        Spline spline = mParameters.getSpline(curveIndex);
81        if (spline == null) {
82            return;
83        }
84        float[] curve = spline.getAppliedCurve();
85        for (int i = 0; i < 256; i++) {
86            array[i] = (int) (curve[i] * 255);
87        }
88    }
89
90    @Override
91    public Bitmap apply(Bitmap bitmap, float scaleFactor, boolean highQuality) {
92        if (!mParameters.getSpline(Spline.RGB).isOriginal()) {
93            int[] rgbGradient = new int[256];
94            populateArray(rgbGradient, Spline.RGB);
95            nativeApplyGradientFilter(bitmap, bitmap.getWidth(), bitmap.getHeight(),
96                    rgbGradient, rgbGradient, rgbGradient);
97        }
98
99        int[] redGradient = null;
100        if (!mParameters.getSpline(Spline.RED).isOriginal()) {
101            redGradient = new int[256];
102            populateArray(redGradient, Spline.RED);
103        }
104        int[] greenGradient = null;
105        if (!mParameters.getSpline(Spline.GREEN).isOriginal()) {
106            greenGradient = new int[256];
107            populateArray(greenGradient, Spline.GREEN);
108        }
109        int[] blueGradient = null;
110        if (!mParameters.getSpline(Spline.BLUE).isOriginal()) {
111            blueGradient = new int[256];
112            populateArray(blueGradient, Spline.BLUE);
113        }
114
115        nativeApplyGradientFilter(bitmap, bitmap.getWidth(), bitmap.getHeight(),
116                redGradient, greenGradient, blueGradient);
117        return bitmap;
118    }
119
120    public void setSpline(Spline spline, int splineIndex) {
121        mParameters.setSpline(splineIndex, new Spline(spline));
122    }
123
124    public Spline getSpline(int splineIndex) {
125        return mParameters.getSpline(splineIndex);
126    }
127
128    public void reset() {
129        Spline spline = new Spline();
130
131        spline.addPoint(0.0f, 1.0f);
132        spline.addPoint(1.0f, 0.0f);
133
134        for (int i = 0; i < 4; i++) {
135            mParameters.setSpline(i, new Spline(spline));
136        }
137    }
138
139    public void useFilter(ImageFilter a) {
140        ImageFilterCurves c = (ImageFilterCurves) a;
141        for (int i = 0; i < 4; i++) {
142            if (c.mParameters.getSpline(i) != null) {
143                setSpline(c.mParameters.getSpline(i), i);
144            }
145        }
146    }
147}
148