The Tor Browser / file comparison
comparison: image/src/DecodeStrategy.h
image/src/DecodeStrategy.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:08f7b0707253 |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 /** @file | |
| 8 * An enumeration used by RasterImage and Decoder to specify which 'strategy' to | |
| 9 * use for image decoding - synchronous or asynchronous. | |
| 10 */ | |
| 11 | |
| 12 #ifndef mozilla_imagelib_DecodeStrategy_h_ | |
| 13 #define mozilla_imagelib_DecodeStrategy_h_ | |
| 14 | |
| 15 namespace mozilla { | |
| 16 namespace image { | |
| 17 | |
| 18 enum DecodeStrategy { | |
| 19 // DECODE_SYNC requests a synchronous decode, which will continue decoding | |
| 20 // frames as long as it has more source data. It returns to the caller only | |
| 21 // once decoding is complete (or until it needs more source data before | |
| 22 // continuing). Because DECODE_SYNC can involve allocating new imgFrames, it | |
| 23 // can only be run on the main thread. | |
| 24 DECODE_SYNC, | |
| 25 | |
| 26 // DECODE_ASYNC requests an asynchronous decode, which will continue decoding | |
| 27 // until it either finishes a frame or runs out of source data. Because | |
| 28 // DECODE_ASYNC does not allocate new imgFrames, it can be safely run off the | |
| 29 // main thread. (And hence workers in the decode pool always use it.) | |
| 30 DECODE_ASYNC | |
| 31 }; | |
| 32 | |
| 33 } // namespace image | |
| 34 } // namespace mozilla | |
| 35 | |
| 36 #endif |
