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| 1 /* | 1 /* |
| 2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
| 5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
| 6 */ | 6 */ |
| 7 | 7 |
| 8 #include "SkFrontBufferedStream.h" | 8 #include "SkFrontBufferedStream.h" |
| 9 #include "SkStream.h" | 9 #include "SkStream.h" |
| 10 #include "SkTemplates.h" | 10 #include "SkTemplates.h" |
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| 62 // data, and size is greater than 0. | 62 // data, and size is greater than 0. |
| 63 size_t readDirectlyFromStream(char* dst, size_t size); | 63 size_t readDirectlyFromStream(char* dst, size_t size); |
| 64 | 64 |
| 65 typedef SkStream INHERITED; | 65 typedef SkStream INHERITED; |
| 66 }; | 66 }; |
| 67 | 67 |
| 68 SkStreamRewindable* SkFrontBufferedStream::Create(SkStream* stream, size_t buffe
rSize) { | 68 SkStreamRewindable* SkFrontBufferedStream::Create(SkStream* stream, size_t buffe
rSize) { |
| 69 if (NULL == stream) { | 69 if (NULL == stream) { |
| 70 return NULL; | 70 return NULL; |
| 71 } | 71 } |
| 72 return SkNEW_ARGS(FrontBufferedStream, (stream, bufferSize)); | 72 return new FrontBufferedStream(stream, bufferSize); |
| 73 } | 73 } |
| 74 | 74 |
| 75 FrontBufferedStream::FrontBufferedStream(SkStream* stream, size_t bufferSize) | 75 FrontBufferedStream::FrontBufferedStream(SkStream* stream, size_t bufferSize) |
| 76 : fStream(stream) | 76 : fStream(stream) |
| 77 , fHasLength(stream->hasPosition() && stream->hasLength()) | 77 , fHasLength(stream->hasPosition() && stream->hasLength()) |
| 78 , fLength(stream->getLength() - stream->getPosition()) | 78 , fLength(stream->getLength() - stream->getPosition()) |
| 79 , fOffset(0) | 79 , fOffset(0) |
| 80 , fBufferedSoFar(0) | 80 , fBufferedSoFar(0) |
| 81 , fBufferSize(bufferSize) | 81 , fBufferSize(bufferSize) |
| 82 , fBuffer(bufferSize) {} | 82 , fBuffer(bufferSize) {} |
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| 205 } | 205 } |
| 206 | 206 |
| 207 if (size > 0 && !fStream->isAtEnd()) { | 207 if (size > 0 && !fStream->isAtEnd()) { |
| 208 SkDEBUGCODE(const size_t bytesReadDirectly =) this->readDirectlyFromStre
am(dst, size); | 208 SkDEBUGCODE(const size_t bytesReadDirectly =) this->readDirectlyFromStre
am(dst, size); |
| 209 SkDEBUGCODE(size -= bytesReadDirectly;) | 209 SkDEBUGCODE(size -= bytesReadDirectly;) |
| 210 SkASSERT(size + (fOffset - start) == totalSize); | 210 SkASSERT(size + (fOffset - start) == totalSize); |
| 211 } | 211 } |
| 212 | 212 |
| 213 return fOffset - start; | 213 return fOffset - start; |
| 214 } | 214 } |
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