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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2006 The Android Open Source Project | 3 * Copyright 2006 The Android Open Source Project |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #ifndef SkImageDecoder_DEFINED | 10 #ifndef SkImageDecoder_DEFINED |
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342 * Pre-allocated memory. | 342 * Pre-allocated memory. |
343 */ | 343 */ |
344 void* fAddr; | 344 void* fAddr; |
345 | 345 |
346 /** | 346 /** |
347 * Rowbytes of the allocated memory. | 347 * Rowbytes of the allocated memory. |
348 */ | 348 */ |
349 size_t fRowBytes; | 349 size_t fRowBytes; |
350 }; | 350 }; |
351 | 351 |
352 /** | |
353 * Decode memory. | |
354 * @param info Output parameter. Returns info about the encoded image. | |
355 * @param target Contains the address of pixel memory to decode into | |
356 * (which must be large enough to hold the width in info) and | |
357 * the row bytes to use. If NULL, returns info and does not | |
358 * decode pixels. | |
359 * @return bool Whether the function succeeded. | |
360 * | |
361 * Sample usage: | |
362 * <code> | |
363 * // Determine the image's info: width/height/config | |
364 * SkImageInfo info; | |
365 * bool success = DecodeMemoryToTarget(src, size, &info, NULL); | |
366 * if (!success) return; | |
367 * // Allocate space for the result: | |
368 * SkBitmapFactory::Target target; | |
369 * target.fAddr = malloc/other allocation | |
370 * target.fRowBytes = ... | |
371 * // Now decode the actual pixels into target. &info is optional, | |
372 * // and could be NULL | |
373 * success = DecodeMemoryToTarget(src, size, &info, &target); | |
374 * </code> | |
375 */ | |
376 static bool DecodeMemoryToTarget(const void* buffer, size_t size, SkImageInf
o* info, | |
377 const Target* target); | |
378 | |
379 /** Decode the image stored in the specified SkStreamRewindable, and store t
he result | 352 /** Decode the image stored in the specified SkStreamRewindable, and store t
he result |
380 in bitmap. Return true for success or false on failure. | 353 in bitmap. Return true for success or false on failure. |
381 | 354 |
382 @param prefConfig If the PrefConfigTable is not set, prefer this config. | 355 @param prefConfig If the PrefConfigTable is not set, prefer this config. |
383 See NOTE ABOUT PREFERRED CONFIGS. | 356 See NOTE ABOUT PREFERRED CONFIGS. |
384 | 357 |
385 @param format On success, if format is non-null, it is set to the format | 358 @param format On success, if format is non-null, it is set to the format |
386 of the decoded stream. On failure it is ignored. | 359 of the decoded stream. On failure it is ignored. |
387 */ | 360 */ |
388 static bool DecodeStream(SkStreamRewindable* stream, SkBitmap* bitmap, | 361 static bool DecodeStream(SkStreamRewindable* stream, SkBitmap* bitmap, |
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561 DECLARE_DECODER_CREATOR(WBMPImageDecoder); | 534 DECLARE_DECODER_CREATOR(WBMPImageDecoder); |
562 DECLARE_DECODER_CREATOR(WEBPImageDecoder); | 535 DECLARE_DECODER_CREATOR(WEBPImageDecoder); |
563 | 536 |
564 | 537 |
565 // Typedefs to make registering decoder and formatter callbacks easier. | 538 // Typedefs to make registering decoder and formatter callbacks easier. |
566 // These have to be defined outside SkImageDecoder. :( | 539 // These have to be defined outside SkImageDecoder. :( |
567 typedef SkTRegistry<SkImageDecoder*(*)(SkStreamRewindable*)> SkImageDecod
er_DecodeReg; | 540 typedef SkTRegistry<SkImageDecoder*(*)(SkStreamRewindable*)> SkImageDecod
er_DecodeReg; |
568 typedef SkTRegistry<SkImageDecoder::Format(*)(SkStreamRewindable*)> SkImageDecod
er_FormatReg; | 541 typedef SkTRegistry<SkImageDecoder::Format(*)(SkStreamRewindable*)> SkImageDecod
er_FormatReg; |
569 | 542 |
570 #endif | 543 #endif |
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