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1 /* | 1 /* |
2 * Copyright 2015 Google Inc. | 2 * Copyright 2015 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 "SkRWBuffer.h" | 8 #include "SkRWBuffer.h" |
9 #include "SkStream.h" | 9 #include "SkStream.h" |
10 | 10 |
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222 void SkRWBuffer::validate() const { | 222 void SkRWBuffer::validate() const { |
223 if (fHead) { | 223 if (fHead) { |
224 fHead->validate(fTotalUsed, fTail); | 224 fHead->validate(fTotalUsed, fTail); |
225 } else { | 225 } else { |
226 SkASSERT(NULL == fTail); | 226 SkASSERT(NULL == fTail); |
227 SkASSERT(0 == fTotalUsed); | 227 SkASSERT(0 == fTotalUsed); |
228 } | 228 } |
229 } | 229 } |
230 #endif | 230 #endif |
231 | 231 |
232 SkROBuffer* SkRWBuffer::newRBufferSnapshot() const { | 232 SkROBuffer* SkRWBuffer::newRBufferSnapshot() const { return new SkROBuffer(fHead
, fTotalUsed); } |
233 return SkNEW_ARGS(SkROBuffer, (fHead, fTotalUsed)); | |
234 } | |
235 | 233 |
236 ////////////////////////////////////////////////////////////////////////////////
/////////////////// | 234 ////////////////////////////////////////////////////////////////////////////////
/////////////////// |
237 | 235 |
238 class SkROBufferStreamAsset : public SkStreamAsset { | 236 class SkROBufferStreamAsset : public SkStreamAsset { |
239 void validate() const { | 237 void validate() const { |
240 #ifdef SK_DEBUG | 238 #ifdef SK_DEBUG |
241 SkASSERT(fGlobalOffset <= fBuffer->size()); | 239 SkASSERT(fGlobalOffset <= fBuffer->size()); |
242 SkASSERT(fLocalOffset <= fIter.size()); | 240 SkASSERT(fLocalOffset <= fIter.size()); |
243 SkASSERT(fLocalOffset <= fGlobalOffset); | 241 SkASSERT(fLocalOffset <= fGlobalOffset); |
244 #endif | 242 #endif |
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298 } | 296 } |
299 fGlobalOffset += bytesRead; | 297 fGlobalOffset += bytesRead; |
300 SkASSERT(fGlobalOffset <= fBuffer->size()); | 298 SkASSERT(fGlobalOffset <= fBuffer->size()); |
301 return bytesRead; | 299 return bytesRead; |
302 } | 300 } |
303 | 301 |
304 bool isAtEnd() const override { | 302 bool isAtEnd() const override { |
305 return fBuffer->size() == fGlobalOffset; | 303 return fBuffer->size() == fGlobalOffset; |
306 } | 304 } |
307 | 305 |
308 SkStreamAsset* duplicate() const override { | 306 SkStreamAsset* duplicate() const override { return new SkROBufferStreamAsset
(fBuffer); } |
309 return SkNEW_ARGS(SkROBufferStreamAsset, (fBuffer)); | |
310 } | |
311 | 307 |
312 size_t getPosition() const override { | 308 size_t getPosition() const override { |
313 return fGlobalOffset; | 309 return fGlobalOffset; |
314 } | 310 } |
315 | 311 |
316 bool seek(size_t position) override { | 312 bool seek(size_t position) override { |
317 AUTO_VALIDATE | 313 AUTO_VALIDATE |
318 if (position < fGlobalOffset) { | 314 if (position < fGlobalOffset) { |
319 this->rewind(); | 315 this->rewind(); |
320 } | 316 } |
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342 | 338 |
343 private: | 339 private: |
344 const SkROBuffer* fBuffer; | 340 const SkROBuffer* fBuffer; |
345 SkROBuffer::Iter fIter; | 341 SkROBuffer::Iter fIter; |
346 size_t fLocalOffset; | 342 size_t fLocalOffset; |
347 size_t fGlobalOffset; | 343 size_t fGlobalOffset; |
348 }; | 344 }; |
349 | 345 |
350 SkStreamAsset* SkRWBuffer::newStreamSnapshot() const { | 346 SkStreamAsset* SkRWBuffer::newStreamSnapshot() const { |
351 SkAutoTUnref<SkROBuffer> buffer(this->newRBufferSnapshot()); | 347 SkAutoTUnref<SkROBuffer> buffer(this->newRBufferSnapshot()); |
352 return SkNEW_ARGS(SkROBufferStreamAsset, (buffer)); | 348 return new SkROBufferStreamAsset(buffer); |
353 } | 349 } |
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