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1 | /* |
2 | Copyright 2006 Jerry Huxtable |
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 | |
17 | /** |
18 | * A filter which acts as a superclass for filters which need to have the whole image in memory |
19 | * to do their stuff. |
20 | */ |
21 | static abstract class WholeImageFilter extends AbstractBufferedImageOp implements IF1<BufferedImage> {
|
22 | |
23 | /** |
24 | * The output image bounds. |
25 | */ |
26 | protected Rectangle transformedSpace; |
27 | |
28 | /** |
29 | * The input image bounds. |
30 | */ |
31 | protected Rectangle originalSpace; |
32 | |
33 | /** |
34 | * Construct a WholeImageFilter. |
35 | */ |
36 | public WholeImageFilter() {
|
37 | } |
38 | |
39 | public BufferedImage get(BufferedImage src) {
|
40 | ret filter(src, null); |
41 | } |
42 | |
43 | public BufferedImage filter( BufferedImage src, BufferedImage dst ) {
|
44 | int width = src.getWidth(); |
45 | int height = src.getHeight(); |
46 | int type = src.getType(); |
47 | WritableRaster srcRaster = src.getRaster(); |
48 | |
49 | originalSpace = new Rectangle(0, 0, width, height); |
50 | transformedSpace = new Rectangle(0, 0, width, height); |
51 | transformSpace(transformedSpace); |
52 | |
53 | if ( dst == null ) {
|
54 | ColorModel dstCM = src.getColorModel(); |
55 | dst = new BufferedImage(dstCM, dstCM.createCompatibleWritableRaster(transformedSpace.width, transformedSpace.height), dstCM.isAlphaPremultiplied(), null); |
56 | } |
57 | WritableRaster dstRaster = dst.getRaster(); |
58 | |
59 | int[] inPixels = getRGB( src, 0, 0, width, height, null ); |
60 | inPixels = filterPixels( width, height, inPixels, transformedSpace ); |
61 | setRGB( dst, 0, 0, transformedSpace.width, transformedSpace.height, inPixels ); |
62 | |
63 | return dst; |
64 | } |
65 | |
66 | /** |
67 | * Calculate output bounds for given input bounds. |
68 | * @param rect input and output rectangle |
69 | */ |
70 | protected void transformSpace(Rectangle rect) {
|
71 | } |
72 | |
73 | /** |
74 | * Actually filter the pixels. |
75 | * @param width the image width |
76 | * @param height the image height |
77 | * @param inPixels the image pixels |
78 | * @param transformedSpace the output bounds |
79 | * @return the output pixels |
80 | */ |
81 | protected abstract int[] filterPixels( int width, int height, int[] inPixels, Rectangle transformedSpace ); |
82 | } |
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| Snippet ID: | #1024653 |
| Snippet name: | WholeImageFilter |
| Eternal ID of this version: | #1024653/3 |
| Text MD5: | 0de5d2c846a339688afb242d52a8b79d |
| Transpilation MD5: | b0ccba240d28bf66676ffffafc581f17 |
| Author: | stefan |
| Category: | javax / imaging |
| Type: | JavaX fragment (include) |
| Public (visible to everyone): | Yes |
| Archived (hidden from active list): | No |
| Created/modified: | 2019-08-24 14:26:52 |
| Source code size: | 2665 bytes / 82 lines |
| Pitched / IR pitched: | No / No |
| Views / Downloads: | 235 / 626 |
| Version history: | 2 change(s) |
| Referenced in: | [show references] |