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1 | package be.nikiroo.utils.android; |
2 | ||
3 | import android.graphics.Bitmap; | |
4 | import android.graphics.BitmapFactory; | |
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5 | |
6 | import java.io.File; | |
7 | import java.io.FileOutputStream; | |
8 | import java.io.IOException; | |
9 | ||
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10 | import javax.imageio.ImageIO; |
11 | ||
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12 | import be.nikiroo.utils.Image; |
13 | import be.nikiroo.utils.ImageUtils; | |
67bcea89 | 14 | import be.nikiroo.utils.StringUtils; |
e704a414 | 15 | |
e8aa5bf9 | 16 | /** |
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17 | * This class offer some utilities based around images and uses the Android |
18 | * framework. | |
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19 | * |
20 | * @author niki | |
21 | */ | |
22 | public class ImageUtilsAndroid extends ImageUtils { | |
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23 | @Override |
24 | protected boolean check() { | |
25 | // If we can get the class, it means we have access to it | |
26 | @SuppressWarnings("unused") | |
27 | Object test = Bitmap.class; | |
28 | return true; | |
29 | } | |
30 | ||
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31 | @Override |
32 | public void saveAsImage(Image img, File target, String format) | |
33 | throws IOException { | |
34 | FileOutputStream fos = new FileOutputStream(target); | |
35 | try { | |
36 | Bitmap image = fromImage(img); | |
37 | ||
38 | boolean ok = false; | |
39 | try { | |
40 | ok = image.compress( | |
41 | Bitmap.CompressFormat.valueOf(format.toUpperCase()), | |
42 | 90, fos); | |
43 | } catch (Exception e) { | |
44 | ok = false; | |
45 | } | |
46 | ||
47 | // Some formats are not reliable | |
48 | // Second change: PNG | |
49 | if (!ok && !format.equals("png")) { | |
50 | ok = image.compress(Bitmap.CompressFormat.PNG, 90, fos); | |
51 | } | |
52 | ||
53 | if (!ok) { | |
54 | throw new IOException( | |
55 | "Cannot find a writer for this image and format: " | |
56 | + format); | |
57 | } | |
58 | } catch (IOException e) { | |
59 | throw new IOException("Cannot write image to " + target, e); | |
60 | } finally { | |
61 | fos.close(); | |
62 | } | |
63 | } | |
64 | ||
65 | /** | |
66 | * Convert the given {@link Image} into a {@link Bitmap} object. | |
67 | * | |
68 | * @param img | |
69 | * the {@link Image} | |
70 | * @return the {@link Image} object | |
71 | * @throws IOException | |
72 | * in case of IO error | |
73 | */ | |
74 | static public Bitmap fromImage(Image img) throws IOException { | |
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75 | byte[] array = img.getData(); |
76 | int size = array.length; | |
10b6023d | 77 | // TODO: check if we can use a stream, too |
7b42695f | 78 | Bitmap image = BitmapFactory.decodeByteArray(array, 0, size); |
e8aa5bf9 | 79 | if (image == null) { |
67bcea89 | 80 | String ssize = StringUtils.formatNumber(size); |
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81 | throw new IOException( |
82 | "Failed to convert input to image, size was: " + ssize); | |
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83 | } |
84 | ||
85 | return image; | |
86 | } | |
87 | } |