David Morrissey | f06b6c0 | 2015-01-12 21:04:09 +0000 | [diff] [blame] | 1 | package com.davemorrissey.labs.subscaleview.decoder; |
| 2 | |
| 3 | import android.content.ContentResolver; |
| 4 | import android.content.Context; |
| 5 | import android.content.pm.PackageManager; |
| 6 | import android.content.res.Resources; |
| 7 | import android.graphics.Bitmap; |
| 8 | import android.graphics.BitmapFactory; |
| 9 | import android.net.Uri; |
David Morrissey | da5fff7 | 2017-12-03 09:38:16 +0000 | [diff] [blame] | 10 | import android.support.annotation.Keep; |
David Morrissey | f06b6c0 | 2015-01-12 21:04:09 +0000 | [diff] [blame] | 11 | import android.text.TextUtils; |
| 12 | |
David Morrissey | bd263d8 | 2017-11-26 08:37:31 +0000 | [diff] [blame] | 13 | import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView; |
| 14 | |
David Morrissey | fc7ce78 | 2015-10-13 09:08:50 +0100 | [diff] [blame] | 15 | import java.io.InputStream; |
David Morrissey | f06b6c0 | 2015-01-12 21:04:09 +0000 | [diff] [blame] | 16 | import java.util.List; |
| 17 | |
| 18 | /** |
| 19 | * Default implementation of {@link com.davemorrissey.labs.subscaleview.decoder.ImageDecoder} |
| 20 | * using Android's {@link android.graphics.BitmapFactory}, based on the Skia library. This |
| 21 | * works well in most circumstances and has reasonable performance, however it has some problems |
| 22 | * with grayscale, indexed and CMYK images. |
| 23 | */ |
| 24 | public class SkiaImageDecoder implements ImageDecoder { |
| 25 | |
| 26 | private static final String FILE_PREFIX = "file://"; |
| 27 | private static final String ASSET_PREFIX = FILE_PREFIX + "/android_asset/"; |
| 28 | private static final String RESOURCE_PREFIX = ContentResolver.SCHEME_ANDROID_RESOURCE + "://"; |
| 29 | |
Khabensky Denis | c95f6e2 | 2017-10-10 12:57:13 +0300 | [diff] [blame] | 30 | private final Bitmap.Config bitmapConfig; |
| 31 | |
David Morrissey | da5fff7 | 2017-12-03 09:38:16 +0000 | [diff] [blame] | 32 | @Keep |
| 33 | @SuppressWarnings("unused") |
Khabensky Denis | c95f6e2 | 2017-10-10 12:57:13 +0300 | [diff] [blame] | 34 | public SkiaImageDecoder() { |
| 35 | this(null); |
| 36 | } |
| 37 | |
David Morrissey | 4856a41 | 2017-12-12 07:54:58 +0000 | [diff] [blame] | 38 | @SuppressWarnings({"WeakerAccess", "SameParameterValue"}) |
Khabensky Denis | c95f6e2 | 2017-10-10 12:57:13 +0300 | [diff] [blame] | 39 | public SkiaImageDecoder(Bitmap.Config bitmapConfig) { |
David Morrissey | bd263d8 | 2017-11-26 08:37:31 +0000 | [diff] [blame] | 40 | Bitmap.Config globalBitmapConfig = SubsamplingScaleImageView.getPreferredBitmapConfig(); |
| 41 | if (bitmapConfig != null) { |
Khabensky Denis | c95f6e2 | 2017-10-10 12:57:13 +0300 | [diff] [blame] | 42 | this.bitmapConfig = bitmapConfig; |
David Morrissey | bd263d8 | 2017-11-26 08:37:31 +0000 | [diff] [blame] | 43 | } else if (globalBitmapConfig != null) { |
| 44 | this.bitmapConfig = globalBitmapConfig; |
| 45 | } else { |
| 46 | this.bitmapConfig = Bitmap.Config.RGB_565; |
David Morrissey | aca4271 | 2017-11-22 19:47:20 +0000 | [diff] [blame] | 47 | } |
Khabensky Denis | c95f6e2 | 2017-10-10 12:57:13 +0300 | [diff] [blame] | 48 | } |
| 49 | |
David Morrissey | f06b6c0 | 2015-01-12 21:04:09 +0000 | [diff] [blame] | 50 | @Override |
| 51 | public Bitmap decode(Context context, Uri uri) throws Exception { |
| 52 | String uriString = uri.toString(); |
| 53 | BitmapFactory.Options options = new BitmapFactory.Options(); |
David Morrissey | c431b2a | 2015-06-14 17:55:11 +0100 | [diff] [blame] | 54 | Bitmap bitmap; |
Khabensky Denis | c95f6e2 | 2017-10-10 12:57:13 +0300 | [diff] [blame] | 55 | options.inPreferredConfig = bitmapConfig; |
David Morrissey | f06b6c0 | 2015-01-12 21:04:09 +0000 | [diff] [blame] | 56 | if (uriString.startsWith(RESOURCE_PREFIX)) { |
| 57 | Resources res; |
| 58 | String packageName = uri.getAuthority(); |
| 59 | if (context.getPackageName().equals(packageName)) { |
| 60 | res = context.getResources(); |
| 61 | } else { |
| 62 | PackageManager pm = context.getPackageManager(); |
| 63 | res = pm.getResourcesForApplication(packageName); |
| 64 | } |
| 65 | |
| 66 | int id = 0; |
| 67 | List<String> segments = uri.getPathSegments(); |
| 68 | int size = segments.size(); |
| 69 | if (size == 2 && segments.get(0).equals("drawable")) { |
| 70 | String resName = segments.get(1); |
| 71 | id = res.getIdentifier(resName, "drawable", packageName); |
| 72 | } else if (size == 1 && TextUtils.isDigitsOnly(segments.get(0))) { |
| 73 | try { |
| 74 | id = Integer.parseInt(segments.get(0)); |
| 75 | } catch (NumberFormatException ignored) { |
| 76 | } |
| 77 | } |
| 78 | |
David Morrissey | c431b2a | 2015-06-14 17:55:11 +0100 | [diff] [blame] | 79 | bitmap = BitmapFactory.decodeResource(context.getResources(), id, options); |
David Morrissey | f06b6c0 | 2015-01-12 21:04:09 +0000 | [diff] [blame] | 80 | } else if (uriString.startsWith(ASSET_PREFIX)) { |
| 81 | String assetName = uriString.substring(ASSET_PREFIX.length()); |
David Morrissey | c431b2a | 2015-06-14 17:55:11 +0100 | [diff] [blame] | 82 | bitmap = BitmapFactory.decodeStream(context.getAssets().open(assetName), null, options); |
David Morrissey | f06b6c0 | 2015-01-12 21:04:09 +0000 | [diff] [blame] | 83 | } else if (uriString.startsWith(FILE_PREFIX)) { |
David Morrissey | c431b2a | 2015-06-14 17:55:11 +0100 | [diff] [blame] | 84 | bitmap = BitmapFactory.decodeFile(uriString.substring(FILE_PREFIX.length()), options); |
David Morrissey | f06b6c0 | 2015-01-12 21:04:09 +0000 | [diff] [blame] | 85 | } else { |
David Morrissey | fc7ce78 | 2015-10-13 09:08:50 +0100 | [diff] [blame] | 86 | InputStream inputStream = null; |
| 87 | try { |
| 88 | ContentResolver contentResolver = context.getContentResolver(); |
| 89 | inputStream = contentResolver.openInputStream(uri); |
| 90 | bitmap = BitmapFactory.decodeStream(inputStream, null, options); |
| 91 | } finally { |
| 92 | if (inputStream != null) { |
David Morrissey | da5fff7 | 2017-12-03 09:38:16 +0000 | [diff] [blame] | 93 | try { inputStream.close(); } catch (Exception e) { /* Ignore */ } |
David Morrissey | fc7ce78 | 2015-10-13 09:08:50 +0100 | [diff] [blame] | 94 | } |
| 95 | } |
David Morrissey | f06b6c0 | 2015-01-12 21:04:09 +0000 | [diff] [blame] | 96 | } |
David Morrissey | c431b2a | 2015-06-14 17:55:11 +0100 | [diff] [blame] | 97 | if (bitmap == null) { |
| 98 | throw new RuntimeException("Skia image region decoder returned null bitmap - image format may not be supported"); |
| 99 | } |
| 100 | return bitmap; |
David Morrissey | f06b6c0 | 2015-01-12 21:04:09 +0000 | [diff] [blame] | 101 | } |
| 102 | } |