mobile/android/base/favicons/decoders/LoadFaviconResult.java@b8a032363ba2 (annotated)
mobile/android/base/favicons/decoders/LoadFaviconResult.java
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | package org.mozilla.gecko.favicons.decoders; |
| michael@0 | 6 | |
| michael@0 | 7 | import android.graphics.Bitmap; |
| michael@0 | 8 | import android.util.Log; |
| michael@0 | 9 | |
| michael@0 | 10 | import java.io.ByteArrayOutputStream; |
| michael@0 | 11 | import java.util.Iterator; |
| michael@0 | 12 | |
| michael@0 | 13 | /** |
| michael@0 | 14 | * Class representing the result of loading a favicon. |
| michael@0 | 15 | * This operation will produce either a collection of favicons, a single favicon, or no favicon. |
| michael@0 | 16 | * It is necessary to model single favicons differently to a collection of one favicon (An entity |
| michael@0 | 17 | * that may not exist with this scheme) since the in-database representation of these things differ. |
| michael@0 | 18 | * (In particular, collections of favicons are stored in encoded ICO format, whereas single icons are |
| michael@0 | 19 | * stored as decoded bitmap blobs.) |
| michael@0 | 20 | */ |
| michael@0 | 21 | public class LoadFaviconResult { |
| michael@0 | 22 | private static final String LOGTAG = "LoadFaviconResult"; |
| michael@0 | 23 | |
| michael@0 | 24 | byte[] faviconBytes; |
| michael@0 | 25 | int offset; |
| michael@0 | 26 | int length; |
| michael@0 | 27 | |
| michael@0 | 28 | boolean isICO; |
| michael@0 | 29 | Iterator<Bitmap> bitmapsDecoded; |
| michael@0 | 30 | |
| michael@0 | 31 | public Iterator<Bitmap> getBitmaps() { |
| michael@0 | 32 | return bitmapsDecoded; |
| michael@0 | 33 | } |
| michael@0 | 34 | |
| michael@0 | 35 | /** |
| michael@0 | 36 | * Return a representation of this result suitable for storing in the database. |
| michael@0 | 37 | * |
| michael@0 | 38 | * @return A byte array containing the bytes from which this result was decoded, |
| michael@0 | 39 | * or null if re-encoding failed. |
| michael@0 | 40 | */ |
| michael@0 | 41 | public byte[] getBytesForDatabaseStorage() { |
| michael@0 | 42 | // Begin by normalising the buffer. |
| michael@0 | 43 | if (offset != 0 || length != faviconBytes.length) { |
| michael@0 | 44 | final byte[] normalised = new byte[length]; |
| michael@0 | 45 | System.arraycopy(faviconBytes, offset, normalised, 0, length); |
| michael@0 | 46 | offset = 0; |
| michael@0 | 47 | faviconBytes = normalised; |
| michael@0 | 48 | } |
| michael@0 | 49 | |
| michael@0 | 50 | // For results containing multiple images, we store the result verbatim. (But cutting the |
| michael@0 | 51 | // buffer to size first). |
| michael@0 | 52 | // We may instead want to consider re-encoding the entire ICO as a collection of efficiently |
| michael@0 | 53 | // encoded PNGs. This may not be worth the CPU time (Indeed, the encoding of single-image |
| michael@0 | 54 | // favicons may also not be worth the time/space tradeoff.). |
| michael@0 | 55 | if (isICO) { |
| michael@0 | 56 | return faviconBytes; |
| michael@0 | 57 | } |
| michael@0 | 58 | |
| michael@0 | 59 | // For results containing a single image, we re-encode the |
| michael@0 | 60 | // result as a PNG in an effort to save space. |
| michael@0 | 61 | final Bitmap favicon = ((FaviconDecoder.SingleBitmapIterator) bitmapsDecoded).peek(); |
| michael@0 | 62 | final ByteArrayOutputStream stream = new ByteArrayOutputStream(); |
| michael@0 | 63 | |
| michael@0 | 64 | try { |
| michael@0 | 65 | if (favicon.compress(Bitmap.CompressFormat.PNG, 100, stream)) { |
| michael@0 | 66 | return stream.toByteArray(); |
| michael@0 | 67 | } |
| michael@0 | 68 | } catch (OutOfMemoryError e) { |
| michael@0 | 69 | Log.w(LOGTAG, "Out of memory re-compressing favicon."); |
| michael@0 | 70 | } |
| michael@0 | 71 | |
| michael@0 | 72 | Log.w(LOGTAG, "Favicon re-compression failed."); |
| michael@0 | 73 | return null; |
| michael@0 | 74 | } |
| michael@0 | 75 | |
| michael@0 | 76 | } |
