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Side by Side Diff: Source/core/platform/image-decoders/gif/GIFImageDecoder.cpp

Issue 23068027: Animated WebP: Optimize decoding in case of seeking (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@add_noblend_image
Patch Set: Fix assert fail on debug Created 7 years, 3 months ago
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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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290 return; 290 return;
291 } 291 }
292 292
293 const size_t oldSize = m_frameBufferCache.size(); 293 const size_t oldSize = m_frameBufferCache.size();
294 m_frameBufferCache.resize(m_reader->imagesCount()); 294 m_frameBufferCache.resize(m_reader->imagesCount());
295 295
296 for (size_t i = oldSize; i < m_reader->imagesCount(); ++i) { 296 for (size_t i = oldSize; i < m_reader->imagesCount(); ++i) {
297 ImageFrame& buffer = m_frameBufferCache[i]; 297 ImageFrame& buffer = m_frameBufferCache[i];
298 const GIFFrameContext* frameContext = m_reader->frameContext(i); 298 const GIFFrameContext* frameContext = m_reader->frameContext(i);
299 buffer.setPremultiplyAlpha(m_premultiplyAlpha); 299 buffer.setPremultiplyAlpha(m_premultiplyAlpha);
300 buffer.setRequiredPreviousFrameIndex(findRequiredPreviousFrame(i)); 300 buffer.setRequiredPreviousFrameIndex(findRequiredPreviousFrame(i, false) );
301 buffer.setDuration(frameContext->delayTime()); 301 buffer.setDuration(frameContext->delayTime());
302 buffer.setDisposalMethod(frameContext->disposalMethod()); 302 buffer.setDisposalMethod(frameContext->disposalMethod());
303 303
304 // Initialize the frame rect in our buffer. 304 // Initialize the frame rect in our buffer.
305 IntRect frameRect = frameContext->frameRect(); 305 IntRect frameRect = frameContext->frameRect();
306 306
307 // Make sure the frameRect doesn't extend outside the buffer. 307 // Make sure the frameRect doesn't extend outside the buffer.
308 if (frameRect.maxX() > size().width()) 308 if (frameRect.maxX() > size().width())
309 frameRect.setWidth(size().width() - frameRect.x()); 309 frameRect.setWidth(size().width() - frameRect.x());
310 if (frameRect.maxY() > size().height()) 310 if (frameRect.maxY() > size().height())
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376 376
377 // Update our status to be partially complete. 377 // Update our status to be partially complete.
378 buffer->setStatus(ImageFrame::FramePartial); 378 buffer->setStatus(ImageFrame::FramePartial);
379 379
380 // Reset the alpha pixel tracker for this frame. 380 // Reset the alpha pixel tracker for this frame.
381 m_currentBufferSawAlpha = false; 381 m_currentBufferSawAlpha = false;
382 return true; 382 return true;
383 } 383 }
384 384
385 } // namespace WebCore 385 } // namespace WebCore
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