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1 /* | 1 /* |
2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. | 2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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349 { | 349 { |
350 // Initialize the frame rect in our buffer. | 350 // Initialize the frame rect in our buffer. |
351 ImageFrame* const buffer = &m_frameBufferCache[frameIndex]; | 351 ImageFrame* const buffer = &m_frameBufferCache[frameIndex]; |
352 | 352 |
353 size_t requiredPreviousFrameIndex = buffer->requiredPreviousFrameIndex(); | 353 size_t requiredPreviousFrameIndex = buffer->requiredPreviousFrameIndex(); |
354 if (requiredPreviousFrameIndex == kNotFound) { | 354 if (requiredPreviousFrameIndex == kNotFound) { |
355 // This frame doesn't rely on any previous data. | 355 // This frame doesn't rely on any previous data. |
356 if (!buffer->setSizeAndColorProfile(size().width(), size().height(), Ima
geFrame::ICCProfile())) | 356 if (!buffer->setSizeAndColorProfile(size().width(), size().height(), Ima
geFrame::ICCProfile())) |
357 return setFailed(); | 357 return setFailed(); |
358 } else { | 358 } else { |
359 const ImageFrame* prevBuffer = &m_frameBufferCache[requiredPreviousFrame
Index]; | 359 ImageFrame* prevBuffer = &m_frameBufferCache[requiredPreviousFrameIndex]
; |
360 ASSERT(prevBuffer->getStatus() == ImageFrame::FrameComplete); | 360 ASSERT(prevBuffer->getStatus() == ImageFrame::FrameComplete); |
361 | 361 |
362 // Preserve the last frame as the starting state for this frame. | 362 // We try to reuse |prevBuffer| as starting state to avoid copying. |
363 if (!buffer->copyBitmapData(*prevBuffer)) | 363 // For DisposeOverwritePrevious, the next frame will also use |
| 364 // |prevBuffer| as its starting state, so we can't take over its image |
| 365 // data using takeBitmapDataIfWritable. Copy the data instead. |
| 366 if ((buffer->getDisposalMethod() == ImageFrame::DisposeOverwritePrevious
|| !buffer->takeBitmapDataIfWritable(prevBuffer)) && !buffer->copyBitmapData(*p
revBuffer)) |
364 return setFailed(); | 367 return setFailed(); |
365 | 368 |
366 if (prevBuffer->getDisposalMethod() == ImageFrame::DisposeOverwriteBgcol
or) { | 369 if (prevBuffer->getDisposalMethod() == ImageFrame::DisposeOverwriteBgcol
or) { |
367 // We want to clear the previous frame to transparent, without | 370 // We want to clear the previous frame to transparent, without |
368 // affecting pixels in the image outside of the frame. | 371 // affecting pixels in the image outside of the frame. |
369 const IntRect& prevRect = prevBuffer->originalFrameRect(); | 372 const IntRect& prevRect = prevBuffer->originalFrameRect(); |
370 ASSERT(!prevRect.contains(IntRect(IntPoint(), size()))); | 373 ASSERT(!prevRect.contains(IntRect(IntPoint(), size()))); |
371 buffer->zeroFillFrameRect(prevRect); | 374 buffer->zeroFillFrameRect(prevRect); |
372 } | 375 } |
373 } | 376 } |
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417 m_purgeAggressively = true; | 420 m_purgeAggressively = true; |
418 return; | 421 return; |
419 } | 422 } |
420 | 423 |
421 const uint64_t totalMemoryUsage = frameMemoryUsage * index; | 424 const uint64_t totalMemoryUsage = frameMemoryUsage * index; |
422 if (totalMemoryUsage > m_maxDecodedBytes) { | 425 if (totalMemoryUsage > m_maxDecodedBytes) { |
423 m_purgeAggressively = true; | 426 m_purgeAggressively = true; |
424 } | 427 } |
425 } | 428 } |
426 } // namespace blink | 429 } // namespace blink |
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