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comparison: gfx/skia/trunk/include/utils/SkFrontBufferedStream.h
gfx/skia/trunk/include/utils/SkFrontBufferedStream.h
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| -1:000000000000 | 0:9bcf299cd4d7 |
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| 1 /* | |
| 2 * Copyright 2013 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #include "SkTypes.h" | |
| 9 | |
| 10 class SkStream; | |
| 11 class SkStreamRewindable; | |
| 12 | |
| 13 /** | |
| 14 * Specialized stream that buffers the first X bytes of a stream, | |
| 15 * where X is passed in by the user. Note that unlike some buffered | |
| 16 * stream APIs, once more bytes than can fit in the buffer are read, | |
| 17 * no more buffering is done. This stream is designed for a use case | |
| 18 * where the caller knows that rewind will only be called from within | |
| 19 * X bytes (inclusive), and the wrapped stream is not necessarily | |
| 20 * able to rewind at all. | |
| 21 */ | |
| 22 class SkFrontBufferedStream { | |
| 23 public: | |
| 24 /** | |
| 25 * Creates a new stream that wraps and buffers an SkStream. | |
| 26 * @param stream SkStream to buffer. If stream is NULL, NULL is | |
| 27 * returned. When this call succeeds (i.e. returns non NULL), | |
| 28 * SkFrontBufferedStream is expected to be the only owner of | |
| 29 * stream, so it should be unreffed and no longer used directly. | |
| 30 * @param minBufferSize Minimum size of buffer required. | |
| 31 * @return An SkStream that can buffer at least minBufferSize, or | |
| 32 * NULL on failure. | |
| 33 */ | |
| 34 static SkStreamRewindable* Create(SkStream* stream, size_t minBufferSize); | |
| 35 }; |
