1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/*
* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.awt.image;
import java.awt.Dimension;
import java.awt.Image;
import java.awt.Graphics;
import java.awt.geom.Dimension2D;
import java.awt.image.BufferedImage;
import java.awt.image.ImageObserver;
import java.util.Arrays;
import java.util.List;
import java.util.function.Function;
import java.util.function.BiFunction;
import java.util.stream.Collectors;
public class MultiResolutionBufferedImage extends BufferedImage
implements MultiResolutionImage {
private final BiFunction<Integer, Integer, Image> mapper;
private final Dimension2D[] sizes;
private int availableInfo;
public MultiResolutionBufferedImage(Image baseImage,
BiFunction<Integer, Integer, Image> mapper) {
this(baseImage, new Dimension[]{new Dimension(
baseImage.getWidth(null), baseImage.getHeight(null))
}, mapper);
}
public MultiResolutionBufferedImage(Image baseImage,
Dimension2D[] sizes, BiFunction<Integer, Integer, Image> mapper) {
super(baseImage.getWidth(null), baseImage.getHeight(null),
BufferedImage.TYPE_INT_ARGB_PRE);
this.sizes = sizes;
this.mapper = mapper;
this.availableInfo = getInfo(baseImage);
Graphics g = getGraphics();
g.drawImage(baseImage, 0, 0, null);
g.dispose();
}
@Override
public Image getResolutionVariant(int width, int height) {
int baseWidth = getWidth();
int baseHeight = getHeight();
if (baseWidth == width && baseHeight == height) {
return this;
}
ImageCache cache = ImageCache.getInstance();
ImageCacheKey key = new ImageCacheKey(this, width, height);
Image resolutionVariant = cache.getImage(key);
if (resolutionVariant == null) {
resolutionVariant = mapper.apply(width, height);
cache.setImage(key, resolutionVariant);
preload(resolutionVariant, availableInfo);
}
return resolutionVariant;
}
@Override
public List<Image> getResolutionVariants() {
return Arrays.stream(sizes).map((Function<Dimension2D, Image>) size
-> getResolutionVariant((int) size.getWidth(),
(int) size.getHeight())).collect(Collectors.toList());
}
public MultiResolutionBufferedImage map(Function<Image, Image> mapper) {
return new MultiResolutionBufferedImage(mapper.apply(this), sizes,
(width, height) ->
mapper.apply(getResolutionVariant(width, height)));
}
@Override
public int getWidth(ImageObserver observer) {
availableInfo |= ImageObserver.WIDTH;
return super.getWidth(observer);
}
@Override
public int getHeight(ImageObserver observer) {
availableInfo |= ImageObserver.HEIGHT;
return super.getHeight(observer);
}
@Override
public Object getProperty(String name, ImageObserver observer) {
availableInfo |= ImageObserver.PROPERTIES;
return super.getProperty(name, observer);
}
private static int getInfo(Image image) {
if (image instanceof ToolkitImage) {
return ((ToolkitImage) image).getImageRep().check(
(img, infoflags, x, y, w, h) -> false);
}
return 0;
}
private static void preload(Image image, int availableInfo) {
if (availableInfo != 0 && image instanceof ToolkitImage) {
((ToolkitImage) image).preload(new ImageObserver() {
int flags = availableInfo;
@Override
public boolean imageUpdate(Image img, int infoflags,
int x, int y, int width, int height) {
flags &= ~infoflags;
return (flags != 0) && ((infoflags
& (ImageObserver.ERROR | ImageObserver.ABORT)) == 0);
}
});
}
}
private static class ImageCacheKey implements ImageCache.PixelsKey {
private final int pixelCount;
private final int hash;
private final int w;
private final int h;
private final Image baseImage;
ImageCacheKey(final Image baseImage,
final int w, final int h) {
this.baseImage = baseImage;
this.w = w;
this.h = h;
this.pixelCount = w * h;
hash = hash();
}
@Override
public int getPixelCount() {
return pixelCount;
}
private int hash() {
int hash = baseImage.hashCode();
hash = 31 * hash + w;
hash = 31 * hash + h;
return hash;
}
@Override
public int hashCode() {
return hash;
}
@Override
public boolean equals(Object obj) {
if (obj instanceof ImageCacheKey) {
ImageCacheKey key = (ImageCacheKey) obj;
return baseImage == key.baseImage && w == key.w && h == key.h;
}
return false;
}
}
}
|
