| 1 | package be.nikiroo.utils.android; |
| 2 | |
| 3 | import android.graphics.Bitmap; |
| 4 | import android.graphics.Bitmap.Config; |
| 5 | import android.graphics.BitmapFactory; |
| 6 | |
| 7 | import java.io.File; |
| 8 | import java.io.FileOutputStream; |
| 9 | import java.io.IOException; |
| 10 | import java.io.InputStream; |
| 11 | import java.util.stream.Stream; |
| 12 | |
| 13 | import javax.imageio.ImageIO; |
| 14 | |
| 15 | import be.nikiroo.utils.Image; |
| 16 | import be.nikiroo.utils.ImageUtils; |
| 17 | import be.nikiroo.utils.StringUtils; |
| 18 | |
| 19 | /** |
| 20 | * This class offer some utilities based around images and uses the Android |
| 21 | * framework. |
| 22 | * |
| 23 | * @author niki |
| 24 | */ |
| 25 | public class ImageUtilsAndroid extends ImageUtils { |
| 26 | @Override |
| 27 | protected boolean check() { |
| 28 | // If we can get the class, it means we have access to it |
| 29 | Config.ALPHA_8; |
| 30 | return true; |
| 31 | } |
| 32 | |
| 33 | @Override |
| 34 | public void saveAsImage(Image img, File target, String format) |
| 35 | throws IOException { |
| 36 | FileOutputStream fos = new FileOutputStream(target); |
| 37 | try { |
| 38 | Bitmap image = fromImage(img); |
| 39 | |
| 40 | boolean ok = false; |
| 41 | try { |
| 42 | ok = image.compress( |
| 43 | Bitmap.CompressFormat.valueOf(format.toUpperCase()), |
| 44 | 90, fos); |
| 45 | } catch (Exception e) { |
| 46 | ok = false; |
| 47 | } |
| 48 | |
| 49 | // Some formats are not reliable |
| 50 | // Second change: PNG |
| 51 | if (!ok && !format.equals("png")) { |
| 52 | ok = image.compress(Bitmap.CompressFormat.PNG, 90, fos); |
| 53 | } |
| 54 | |
| 55 | if (!ok) { |
| 56 | throw new IOException( |
| 57 | "Cannot find a writer for this image and format: " |
| 58 | + format); |
| 59 | } |
| 60 | } catch (IOException e) { |
| 61 | throw new IOException("Cannot write image to " + target, e); |
| 62 | } finally { |
| 63 | fos.close(); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Convert the given {@link Image} into a {@link Bitmap} object. |
| 69 | * |
| 70 | * @param img |
| 71 | * the {@link Image} |
| 72 | * @return the {@link Image} object |
| 73 | * @throws IOException |
| 74 | * in case of IO error |
| 75 | */ |
| 76 | static public Bitmap fromImage(Image img) throws IOException { |
| 77 | InputStream stream = img.newInputStream(); |
| 78 | try { |
| 79 | Bitmap image = BitmapFactory.decodeStream(stream); |
| 80 | if (image == null) { |
| 81 | String ssize = StringUtils.formatNumber(img.getSize()); |
| 82 | throw new IOException( |
| 83 | "Failed to convert input to image, size was: " + ssize); |
| 84 | } |
| 85 | } finally { |
| 86 | stream.close(); |
| 87 | } |
| 88 | |
| 89 | return image; |
| 90 | } |
| 91 | } |