The Tor Browser / file comparison
comparison: mobile/android/base/favicons/decoders/LoadFaviconResult.java
mobile/android/base/favicons/decoders/LoadFaviconResult.java
- branch
- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
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| -1:000000000000 | 0:9664f31f8590 |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 package org.mozilla.gecko.favicons.decoders; | |
| 6 | |
| 7 import android.graphics.Bitmap; | |
| 8 import android.util.Log; | |
| 9 | |
| 10 import java.io.ByteArrayOutputStream; | |
| 11 import java.util.Iterator; | |
| 12 | |
| 13 /** | |
| 14 * Class representing the result of loading a favicon. | |
| 15 * This operation will produce either a collection of favicons, a single favicon, or no favicon. | |
| 16 * It is necessary to model single favicons differently to a collection of one favicon (An entity | |
| 17 * that may not exist with this scheme) since the in-database representation of these things differ. | |
| 18 * (In particular, collections of favicons are stored in encoded ICO format, whereas single icons are | |
| 19 * stored as decoded bitmap blobs.) | |
| 20 */ | |
| 21 public class LoadFaviconResult { | |
| 22 private static final String LOGTAG = "LoadFaviconResult"; | |
| 23 | |
| 24 byte[] faviconBytes; | |
| 25 int offset; | |
| 26 int length; | |
| 27 | |
| 28 boolean isICO; | |
| 29 Iterator<Bitmap> bitmapsDecoded; | |
| 30 | |
| 31 public Iterator<Bitmap> getBitmaps() { | |
| 32 return bitmapsDecoded; | |
| 33 } | |
| 34 | |
| 35 /** | |
| 36 * Return a representation of this result suitable for storing in the database. | |
| 37 * | |
| 38 * @return A byte array containing the bytes from which this result was decoded, | |
| 39 * or null if re-encoding failed. | |
| 40 */ | |
| 41 public byte[] getBytesForDatabaseStorage() { | |
| 42 // Begin by normalising the buffer. | |
| 43 if (offset != 0 || length != faviconBytes.length) { | |
| 44 final byte[] normalised = new byte[length]; | |
| 45 System.arraycopy(faviconBytes, offset, normalised, 0, length); | |
| 46 offset = 0; | |
| 47 faviconBytes = normalised; | |
| 48 } | |
| 49 | |
| 50 // For results containing multiple images, we store the result verbatim. (But cutting the | |
| 51 // buffer to size first). | |
| 52 // We may instead want to consider re-encoding the entire ICO as a collection of efficiently | |
| 53 // encoded PNGs. This may not be worth the CPU time (Indeed, the encoding of single-image | |
| 54 // favicons may also not be worth the time/space tradeoff.). | |
| 55 if (isICO) { | |
| 56 return faviconBytes; | |
| 57 } | |
| 58 | |
| 59 // For results containing a single image, we re-encode the | |
| 60 // result as a PNG in an effort to save space. | |
| 61 final Bitmap favicon = ((FaviconDecoder.SingleBitmapIterator) bitmapsDecoded).peek(); | |
| 62 final ByteArrayOutputStream stream = new ByteArrayOutputStream(); | |
| 63 | |
| 64 try { | |
| 65 if (favicon.compress(Bitmap.CompressFormat.PNG, 100, stream)) { | |
| 66 return stream.toByteArray(); | |
| 67 } | |
| 68 } catch (OutOfMemoryError e) { | |
| 69 Log.w(LOGTAG, "Out of memory re-compressing favicon."); | |
| 70 } | |
| 71 | |
| 72 Log.w(LOGTAG, "Favicon re-compression failed."); | |
| 73 return null; | |
| 74 } | |
| 75 | |
| 76 } |
