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1 /* | 1 /* |
2 * Copyright 2006 The Android Open Source Project | 2 * Copyright 2006 The Android Open Source Project |
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 #ifndef SkStream_DEFINED | 8 #ifndef SkStream_DEFINED |
9 #define SkStream_DEFINED | 9 #define SkStream_DEFINED |
10 | 10 |
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174 class SK_API SkStreamMemory : public SkStreamAsset { | 174 class SK_API SkStreamMemory : public SkStreamAsset { |
175 public: | 175 public: |
176 SkStreamMemory* duplicate() const override = 0; | 176 SkStreamMemory* duplicate() const override = 0; |
177 SkStreamMemory* fork() const override = 0; | 177 SkStreamMemory* fork() const override = 0; |
178 | 178 |
179 const void* getMemoryBase() override = 0; | 179 const void* getMemoryBase() override = 0; |
180 }; | 180 }; |
181 | 181 |
182 class SK_API SkWStream : SkNoncopyable { | 182 class SK_API SkWStream : SkNoncopyable { |
183 public: | 183 public: |
184 SK_DECLARE_INST_COUNT(SkWStream) | |
185 | |
186 virtual ~SkWStream(); | 184 virtual ~SkWStream(); |
187 | 185 |
188 /** Called to write bytes to a SkWStream. Returns true on success | 186 /** Called to write bytes to a SkWStream. Returns true on success |
189 @param buffer the address of at least size bytes to be written to the st
ream | 187 @param buffer the address of at least size bytes to be written to the st
ream |
190 @param size The number of bytes in buffer to write to the stream | 188 @param size The number of bytes in buffer to write to the stream |
191 @return true on success | 189 @return true on success |
192 */ | 190 */ |
193 virtual bool write(const void* buffer, size_t size) = 0; | 191 virtual bool write(const void* buffer, size_t size) = 0; |
194 virtual void newline(); | 192 virtual void newline(); |
195 virtual void flush(); | 193 virtual void flush(); |
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224 ////////////////////////////////////////////////////////////////////////////////
//////// | 222 ////////////////////////////////////////////////////////////////////////////////
//////// |
225 | 223 |
226 #include "SkString.h" | 224 #include "SkString.h" |
227 #include <stdio.h> | 225 #include <stdio.h> |
228 | 226 |
229 struct SkFILE; | 227 struct SkFILE; |
230 | 228 |
231 /** A stream that wraps a C FILE* file stream. */ | 229 /** A stream that wraps a C FILE* file stream. */ |
232 class SK_API SkFILEStream : public SkStreamAsset { | 230 class SK_API SkFILEStream : public SkStreamAsset { |
233 public: | 231 public: |
234 SK_DECLARE_INST_COUNT(SkFILEStream) | |
235 | |
236 /** Initialize the stream by calling sk_fopen on the specified path. | 232 /** Initialize the stream by calling sk_fopen on the specified path. |
237 * This internal stream will be closed in the destructor. | 233 * This internal stream will be closed in the destructor. |
238 */ | 234 */ |
239 explicit SkFILEStream(const char path[] = NULL); | 235 explicit SkFILEStream(const char path[] = NULL); |
240 | 236 |
241 enum Ownership { | 237 enum Ownership { |
242 kCallerPasses_Ownership, | 238 kCallerPasses_Ownership, |
243 kCallerRetains_Ownership | 239 kCallerRetains_Ownership |
244 }; | 240 }; |
245 /** Initialize the stream with an existing C file stream. | 241 /** Initialize the stream with an existing C file stream. |
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279 SkString fName; | 275 SkString fName; |
280 Ownership fOwnership; | 276 Ownership fOwnership; |
281 // fData is lazilly initialized when needed. | 277 // fData is lazilly initialized when needed. |
282 mutable SkAutoTUnref<SkData> fData; | 278 mutable SkAutoTUnref<SkData> fData; |
283 | 279 |
284 typedef SkStreamAsset INHERITED; | 280 typedef SkStreamAsset INHERITED; |
285 }; | 281 }; |
286 | 282 |
287 class SK_API SkMemoryStream : public SkStreamMemory { | 283 class SK_API SkMemoryStream : public SkStreamMemory { |
288 public: | 284 public: |
289 SK_DECLARE_INST_COUNT(SkMemoryStream) | |
290 | |
291 SkMemoryStream(); | 285 SkMemoryStream(); |
292 | 286 |
293 /** We allocate (and free) the memory. Write to it via getMemoryBase() */ | 287 /** We allocate (and free) the memory. Write to it via getMemoryBase() */ |
294 SkMemoryStream(size_t length); | 288 SkMemoryStream(size_t length); |
295 | 289 |
296 /** If copyData is true, the stream makes a private copy of the data. */ | 290 /** If copyData is true, the stream makes a private copy of the data. */ |
297 SkMemoryStream(const void* data, size_t length, bool copyData = false); | 291 SkMemoryStream(const void* data, size_t length, bool copyData = false); |
298 | 292 |
299 /** Use the specified data as the memory for this stream. | 293 /** Use the specified data as the memory for this stream. |
300 * The stream will call ref() on the data (assuming it is not NULL). | 294 * The stream will call ref() on the data (assuming it is not NULL). |
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351 SkData* fData; | 345 SkData* fData; |
352 size_t fOffset; | 346 size_t fOffset; |
353 | 347 |
354 typedef SkStreamMemory INHERITED; | 348 typedef SkStreamMemory INHERITED; |
355 }; | 349 }; |
356 | 350 |
357 ////////////////////////////////////////////////////////////////////////////////
///////////// | 351 ////////////////////////////////////////////////////////////////////////////////
///////////// |
358 | 352 |
359 class SK_API SkFILEWStream : public SkWStream { | 353 class SK_API SkFILEWStream : public SkWStream { |
360 public: | 354 public: |
361 SK_DECLARE_INST_COUNT(SkFILEWStream) | |
362 | |
363 SkFILEWStream(const char path[]); | 355 SkFILEWStream(const char path[]); |
364 virtual ~SkFILEWStream(); | 356 virtual ~SkFILEWStream(); |
365 | 357 |
366 /** Returns true if the current path could be opened. | 358 /** Returns true if the current path could be opened. |
367 */ | 359 */ |
368 bool isValid() const { return fFILE != NULL; } | 360 bool isValid() const { return fFILE != NULL; } |
369 | 361 |
370 bool write(const void* buffer, size_t size) override; | 362 bool write(const void* buffer, size_t size) override; |
371 void flush() override; | 363 void flush() override; |
372 size_t bytesWritten() const override; | 364 size_t bytesWritten() const override; |
373 | 365 |
374 private: | 366 private: |
375 SkFILE* fFILE; | 367 SkFILE* fFILE; |
376 | 368 |
377 typedef SkWStream INHERITED; | 369 typedef SkWStream INHERITED; |
378 }; | 370 }; |
379 | 371 |
380 class SkMemoryWStream : public SkWStream { | 372 class SkMemoryWStream : public SkWStream { |
381 public: | 373 public: |
382 SK_DECLARE_INST_COUNT(SkMemoryWStream) | |
383 | |
384 SkMemoryWStream(void* buffer, size_t size); | 374 SkMemoryWStream(void* buffer, size_t size); |
385 bool write(const void* buffer, size_t size) override; | 375 bool write(const void* buffer, size_t size) override; |
386 size_t bytesWritten() const override { return fBytesWritten; } | 376 size_t bytesWritten() const override { return fBytesWritten; } |
387 | 377 |
388 private: | 378 private: |
389 char* fBuffer; | 379 char* fBuffer; |
390 size_t fMaxLength; | 380 size_t fMaxLength; |
391 size_t fBytesWritten; | 381 size_t fBytesWritten; |
392 | 382 |
393 typedef SkWStream INHERITED; | 383 typedef SkWStream INHERITED; |
394 }; | 384 }; |
395 | 385 |
396 class SK_API SkDynamicMemoryWStream : public SkWStream { | 386 class SK_API SkDynamicMemoryWStream : public SkWStream { |
397 public: | 387 public: |
398 SK_DECLARE_INST_COUNT(SkDynamicMemoryWStream) | |
399 | |
400 SkDynamicMemoryWStream(); | 388 SkDynamicMemoryWStream(); |
401 virtual ~SkDynamicMemoryWStream(); | 389 virtual ~SkDynamicMemoryWStream(); |
402 | 390 |
403 bool write(const void* buffer, size_t size) override; | 391 bool write(const void* buffer, size_t size) override; |
404 size_t bytesWritten() const override { return fBytesWritten; } | 392 size_t bytesWritten() const override { return fBytesWritten; } |
405 // random access write | 393 // random access write |
406 // modifies stream and returns true if offset + size is less than or equal t
o getOffset() | 394 // modifies stream and returns true if offset + size is less than or equal t
o getOffset() |
407 bool write(const void* buffer, size_t offset, size_t size); | 395 bool write(const void* buffer, size_t offset, size_t size); |
408 bool read(void* buffer, size_t offset, size_t size); | 396 bool read(void* buffer, size_t offset, size_t size); |
409 size_t getOffset() const { return fBytesWritten; } | 397 size_t getOffset() const { return fBytesWritten; } |
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437 friend class SkBlockMemoryStream; | 425 friend class SkBlockMemoryStream; |
438 friend class SkBlockMemoryRefCnt; | 426 friend class SkBlockMemoryRefCnt; |
439 | 427 |
440 typedef SkWStream INHERITED; | 428 typedef SkWStream INHERITED; |
441 }; | 429 }; |
442 | 430 |
443 | 431 |
444 class SK_API SkDebugWStream : public SkWStream { | 432 class SK_API SkDebugWStream : public SkWStream { |
445 public: | 433 public: |
446 SkDebugWStream() : fBytesWritten(0) {} | 434 SkDebugWStream() : fBytesWritten(0) {} |
447 SK_DECLARE_INST_COUNT(SkDebugWStream) | |
448 | 435 |
449 // overrides | 436 // overrides |
450 bool write(const void* buffer, size_t size) override; | 437 bool write(const void* buffer, size_t size) override; |
451 void newline() override; | 438 void newline() override; |
452 size_t bytesWritten() const override { return fBytesWritten; } | 439 size_t bytesWritten() const override { return fBytesWritten; } |
453 | 440 |
454 private: | 441 private: |
455 size_t fBytesWritten; | 442 size_t fBytesWritten; |
456 typedef SkWStream INHERITED; | 443 typedef SkWStream INHERITED; |
457 }; | 444 }; |
458 | 445 |
459 // for now | 446 // for now |
460 typedef SkFILEStream SkURLStream; | 447 typedef SkFILEStream SkURLStream; |
461 | 448 |
462 #endif | 449 #endif |
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