image/src/DecodeStrategy.h@6474c204b198 (annotated)
image/src/DecodeStrategy.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
| michael@0 | 2 | * |
| michael@0 | 3 | * This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | /** @file |
| michael@0 | 8 | * An enumeration used by RasterImage and Decoder to specify which 'strategy' to |
| michael@0 | 9 | * use for image decoding - synchronous or asynchronous. |
| michael@0 | 10 | */ |
| michael@0 | 11 | |
| michael@0 | 12 | #ifndef mozilla_imagelib_DecodeStrategy_h_ |
| michael@0 | 13 | #define mozilla_imagelib_DecodeStrategy_h_ |
| michael@0 | 14 | |
| michael@0 | 15 | namespace mozilla { |
| michael@0 | 16 | namespace image { |
| michael@0 | 17 | |
| michael@0 | 18 | enum DecodeStrategy { |
| michael@0 | 19 | // DECODE_SYNC requests a synchronous decode, which will continue decoding |
| michael@0 | 20 | // frames as long as it has more source data. It returns to the caller only |
| michael@0 | 21 | // once decoding is complete (or until it needs more source data before |
| michael@0 | 22 | // continuing). Because DECODE_SYNC can involve allocating new imgFrames, it |
| michael@0 | 23 | // can only be run on the main thread. |
| michael@0 | 24 | DECODE_SYNC, |
| michael@0 | 25 | |
| michael@0 | 26 | // DECODE_ASYNC requests an asynchronous decode, which will continue decoding |
| michael@0 | 27 | // until it either finishes a frame or runs out of source data. Because |
| michael@0 | 28 | // DECODE_ASYNC does not allocate new imgFrames, it can be safely run off the |
| michael@0 | 29 | // main thread. (And hence workers in the decode pool always use it.) |
| michael@0 | 30 | DECODE_ASYNC |
| michael@0 | 31 | }; |
| michael@0 | 32 | |
| michael@0 | 33 | } // namespace image |
| michael@0 | 34 | } // namespace mozilla |
| michael@0 | 35 | |
| michael@0 | 36 | #endif |
