1/*
2 * Copyright (C) 2013 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.RectF;
20import android.util.JsonReader;
21import android.util.JsonWriter;
22
23import com.android.gallery3d.R;
24import com.android.gallery3d.filtershow.editors.EditorCrop;
25
26import java.io.IOException;
27
28public class FilterCropRepresentation extends FilterRepresentation {
29    public static final String SERIALIZATION_NAME = "CROP";
30    public static final String[] BOUNDS = {
31            "C0", "C1", "C2", "C3"
32    };
33    private static final String TAG = FilterCropRepresentation.class.getSimpleName();
34
35    RectF mCrop = getNil();
36
37    public FilterCropRepresentation(RectF crop) {
38        super(SERIALIZATION_NAME);
39        setSerializationName(SERIALIZATION_NAME);
40        setShowParameterValue(true);
41        setFilterClass(FilterCropRepresentation.class);
42        setFilterType(FilterRepresentation.TYPE_GEOMETRY);
43        setSupportsPartialRendering(true);
44        setTextId(R.string.crop);
45        setEditorId(EditorCrop.ID);
46        setCrop(crop);
47    }
48
49    public FilterCropRepresentation(FilterCropRepresentation m) {
50        this(m.mCrop);
51        setName(m.getName());
52    }
53
54    public FilterCropRepresentation() {
55        this(sNilRect);
56    }
57
58    public void set(FilterCropRepresentation r) {
59        mCrop.set(r.mCrop);
60    }
61
62    @Override
63    public boolean equals(FilterRepresentation rep) {
64        if (!(rep instanceof FilterCropRepresentation)) {
65            return false;
66        }
67        FilterCropRepresentation crop = (FilterCropRepresentation) rep;
68        if (mCrop.bottom != crop.mCrop.bottom
69            || mCrop.left != crop.mCrop.left
70            || mCrop.right != crop.mCrop.right
71            || mCrop.top != crop.mCrop.top) {
72            return false;
73        }
74        return true;
75    }
76
77    public RectF getCrop() {
78        return new RectF(mCrop);
79    }
80
81    public void getCrop(RectF r) {
82        r.set(mCrop);
83    }
84
85    public void setCrop(RectF crop) {
86        if (crop == null) {
87            throw new IllegalArgumentException("Argument to setCrop is null");
88        }
89        mCrop.set(crop);
90    }
91
92    /**
93     * Takes a crop rect contained by [0, 0, 1, 1] and scales it by the height
94     * and width of the image rect.
95     */
96    public static void findScaledCrop(RectF crop, int bitmapWidth, int bitmapHeight) {
97        crop.left *= bitmapWidth;
98        crop.top *= bitmapHeight;
99        crop.right *= bitmapWidth;
100        crop.bottom *= bitmapHeight;
101    }
102
103    /**
104     * Takes crop rect and normalizes it by scaling down by the height and width
105     * of the image rect.
106     */
107    public static void findNormalizedCrop(RectF crop, int bitmapWidth, int bitmapHeight) {
108        crop.left /= bitmapWidth;
109        crop.top /= bitmapHeight;
110        crop.right /= bitmapWidth;
111        crop.bottom /= bitmapHeight;
112    }
113
114    @Override
115    public boolean allowsSingleInstanceOnly() {
116        return true;
117    }
118
119    @Override
120    public FilterRepresentation copy() {
121        return new FilterCropRepresentation(this);
122    }
123
124    @Override
125    protected void copyAllParameters(FilterRepresentation representation) {
126        if (!(representation instanceof FilterCropRepresentation)) {
127            throw new IllegalArgumentException("calling copyAllParameters with incompatible types!");
128        }
129        super.copyAllParameters(representation);
130        representation.useParametersFrom(this);
131    }
132
133    @Override
134    public void useParametersFrom(FilterRepresentation a) {
135        if (!(a instanceof FilterCropRepresentation)) {
136            throw new IllegalArgumentException("calling useParametersFrom with incompatible types!");
137        }
138        setCrop(((FilterCropRepresentation) a).mCrop);
139    }
140
141    private static final RectF sNilRect = new RectF(0, 0, 1, 1);
142
143    @Override
144    public boolean isNil() {
145        return mCrop.equals(sNilRect);
146    }
147
148    public static RectF getNil() {
149        return new RectF(sNilRect);
150    }
151
152    @Override
153    public void serializeRepresentation(JsonWriter writer) throws IOException {
154        writer.beginObject();
155        writer.name(BOUNDS[0]).value(mCrop.left);
156        writer.name(BOUNDS[1]).value(mCrop.top);
157        writer.name(BOUNDS[2]).value(mCrop.right);
158        writer.name(BOUNDS[3]).value(mCrop.bottom);
159        writer.endObject();
160    }
161
162    @Override
163    public void deSerializeRepresentation(JsonReader reader) throws IOException {
164        reader.beginObject();
165        while (reader.hasNext()) {
166            String name = reader.nextName();
167            if (BOUNDS[0].equals(name)) {
168                mCrop.left = (float) reader.nextDouble();
169            } else if (BOUNDS[1].equals(name)) {
170                mCrop.top = (float) reader.nextDouble();
171            } else if (BOUNDS[2].equals(name)) {
172                mCrop.right = (float) reader.nextDouble();
173            } else if (BOUNDS[3].equals(name)) {
174                mCrop.bottom = (float) reader.nextDouble();
175            } else {
176                reader.skipValue();
177            }
178        }
179        reader.endObject();
180    }
181}
182