[Webkit-unassigned] [Bug 182277] New: BitmapImage::drawPattern() may not draw a complete frame even after all the data is received
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Mon Jan 29 20:46:00 PST 2018
https://bugs.webkit.org/show_bug.cgi?id=182277
Bug ID: 182277
Summary: BitmapImage::drawPattern() may not draw a complete
frame even after all the data is received
Product: WebKit
Version: WebKit Nightly Build
Hardware: Unspecified
OS: Unspecified
Status: NEW
Severity: Normal
Priority: P2
Component: Images
Assignee: webkit-unassigned at lists.webkit.org
Reporter: sabouhallawa at apple.com
This may happen if the same image is not drawn synchronously through BitmapImage::draw(). The member BitmapImage::m_currentFrameDecodingStatus was added to control when a decoded frame can be destroyed. For asynchronous image decoding, we may want to keep the incomplete decoded frame till the more complete frame finishes decoding so we have something to paint. For synchronous image drawing, we know we have to destroy the incomplete decoded frame because we are going to generate a new one.
The BitmapImage::drawPattern() asks for a decoded frame if it is not cached and then draws it by calling GraphicsContext::drawPattern(). We need to destroy the incomplete decoded frames before trying to draw it as a pattern.
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