3417 |
24 Jun 15 |
nicklas |
1 |
package net.sf.basedb.thumbnails.impl; |
3417 |
24 Jun 15 |
nicklas |
2 |
|
3417 |
24 Jun 15 |
nicklas |
3 |
import java.awt.image.BufferedImage; |
3417 |
24 Jun 15 |
nicklas |
4 |
import java.io.IOException; |
3417 |
24 Jun 15 |
nicklas |
5 |
import java.io.InputStream; |
3417 |
24 Jun 15 |
nicklas |
6 |
import java.util.List; |
3417 |
24 Jun 15 |
nicklas |
7 |
|
3417 |
24 Jun 15 |
nicklas |
8 |
import org.apache.pdfbox.pdmodel.PDDocument; |
3417 |
24 Jun 15 |
nicklas |
9 |
import org.apache.pdfbox.pdmodel.PDPage; |
6043 |
11 Nov 20 |
nicklas |
10 |
import org.imgscalr.Scalr; |
6043 |
11 Nov 20 |
nicklas |
11 |
import org.imgscalr.Scalr.Rotation; |
3417 |
24 Jun 15 |
nicklas |
12 |
|
6053 |
13 Nov 20 |
nicklas |
13 |
import net.sf.basedb.thumbnails.Crop; |
3417 |
24 Jun 15 |
nicklas |
14 |
import net.sf.basedb.thumbnails.ImageLoader; |
5351 |
10 Apr 19 |
nicklas |
15 |
import net.sf.basedb.thumbnails.ThumbnailSize; |
5351 |
10 Apr 19 |
nicklas |
16 |
import net.sf.basedb.thumbnails.Thumbnails; |
3417 |
24 Jun 15 |
nicklas |
17 |
import net.sf.basedb.util.FileUtil; |
3417 |
24 Jun 15 |
nicklas |
18 |
|
3417 |
24 Jun 15 |
nicklas |
19 |
/** |
3417 |
24 Jun 15 |
nicklas |
Image loader implementation that expects a PDF file and |
5351 |
10 Apr 19 |
nicklas |
convertes the first page to an image. Thumbnails are scaled |
5351 |
10 Apr 19 |
nicklas |
and returned as JPG images. |
3417 |
24 Jun 15 |
nicklas |
23 |
|
3417 |
24 Jun 15 |
nicklas |
@author nicklas |
3417 |
24 Jun 15 |
nicklas |
@since 1.0 |
3417 |
24 Jun 15 |
nicklas |
26 |
*/ |
3417 |
24 Jun 15 |
nicklas |
27 |
public class PdfImageLoader |
3417 |
24 Jun 15 |
nicklas |
28 |
implements ImageLoader |
3417 |
24 Jun 15 |
nicklas |
29 |
{ |
5351 |
10 Apr 19 |
nicklas |
30 |
|
5351 |
10 Apr 19 |
nicklas |
31 |
private BufferedImage image; |
3417 |
24 Jun 15 |
nicklas |
32 |
|
3417 |
24 Jun 15 |
nicklas |
33 |
public PdfImageLoader() |
3417 |
24 Jun 15 |
nicklas |
34 |
{} |
5351 |
10 Apr 19 |
nicklas |
35 |
|
5351 |
10 Apr 19 |
nicklas |
36 |
@Override |
5351 |
10 Apr 19 |
nicklas |
37 |
public String getThumbMimeType() |
5351 |
10 Apr 19 |
nicklas |
38 |
{ |
5351 |
10 Apr 19 |
nicklas |
39 |
return "image/jpg"; |
5351 |
10 Apr 19 |
nicklas |
40 |
} |
3417 |
24 Jun 15 |
nicklas |
41 |
|
5351 |
10 Apr 19 |
nicklas |
42 |
@Override |
5351 |
10 Apr 19 |
nicklas |
43 |
public String getThumbExtension() |
5351 |
10 Apr 19 |
nicklas |
44 |
{ |
5351 |
10 Apr 19 |
nicklas |
45 |
return "jpg"; |
5351 |
10 Apr 19 |
nicklas |
46 |
} |
5351 |
10 Apr 19 |
nicklas |
47 |
|
5351 |
10 Apr 19 |
nicklas |
48 |
|
3417 |
24 Jun 15 |
nicklas |
49 |
@SuppressWarnings("unchecked") |
3417 |
24 Jun 15 |
nicklas |
50 |
@Override |
6046 |
11 Nov 20 |
nicklas |
51 |
public void loadImage(InputStream in, int imageIndex) |
3417 |
24 Jun 15 |
nicklas |
52 |
throws IOException |
3417 |
24 Jun 15 |
nicklas |
53 |
{ |
3417 |
24 Jun 15 |
nicklas |
54 |
PDDocument pdf = null; |
3417 |
24 Jun 15 |
nicklas |
55 |
try |
3417 |
24 Jun 15 |
nicklas |
56 |
{ |
3417 |
24 Jun 15 |
nicklas |
57 |
pdf = PDDocument.load(in); |
3417 |
24 Jun 15 |
nicklas |
58 |
List<PDPage> pages = (List<PDPage>)pdf.getDocumentCatalog().getAllPages(); |
6046 |
11 Nov 20 |
nicklas |
59 |
if (imageIndex < 0) |
6046 |
11 Nov 20 |
nicklas |
60 |
{ |
6046 |
11 Nov 20 |
nicklas |
61 |
imageIndex = 0; |
6046 |
11 Nov 20 |
nicklas |
62 |
} |
6046 |
11 Nov 20 |
nicklas |
63 |
else if (imageIndex >= pages.size()) |
6046 |
11 Nov 20 |
nicklas |
64 |
{ |
6046 |
11 Nov 20 |
nicklas |
65 |
imageIndex = pages.size() - 1; |
6046 |
11 Nov 20 |
nicklas |
66 |
} |
6046 |
11 Nov 20 |
nicklas |
67 |
image = pages.get(imageIndex).convertToImage(BufferedImage.TYPE_INT_RGB, 300); |
3417 |
24 Jun 15 |
nicklas |
68 |
} |
3417 |
24 Jun 15 |
nicklas |
69 |
finally |
3417 |
24 Jun 15 |
nicklas |
70 |
{ |
3417 |
24 Jun 15 |
nicklas |
71 |
FileUtil.close(pdf); |
3417 |
24 Jun 15 |
nicklas |
72 |
} |
3417 |
24 Jun 15 |
nicklas |
73 |
} |
5351 |
10 Apr 19 |
nicklas |
74 |
|
5351 |
10 Apr 19 |
nicklas |
75 |
@Override |
6053 |
13 Nov 20 |
nicklas |
76 |
public byte[] getThumbImage(ThumbnailSize size, Rotation rotation, Crop crop) |
5351 |
10 Apr 19 |
nicklas |
77 |
throws IOException |
5351 |
10 Apr 19 |
nicklas |
78 |
{ |
6053 |
13 Nov 20 |
nicklas |
79 |
BufferedImage tmp = crop == null ? image : crop.crop(image); |
6053 |
13 Nov 20 |
nicklas |
80 |
BufferedImage thumb = Thumbnails.scaleImage(tmp, size); |
6043 |
11 Nov 20 |
nicklas |
81 |
if (rotation != null) thumb = Scalr.rotate(thumb, rotation); |
5351 |
10 Apr 19 |
nicklas |
82 |
byte[] jpg = Thumbnails.toJpg(thumb, size.MEMORY); |
5351 |
10 Apr 19 |
nicklas |
83 |
return jpg; |
5351 |
10 Apr 19 |
nicklas |
84 |
} |
3417 |
24 Jun 15 |
nicklas |
85 |
} |