Live resizing a window typically causes a ton of image repaints. For images not at 1:1 scale, we should rescale at low quality until resizing ends. This'll avoid unnecessary work, especially on high-DPI devices where upscaled images are common.
<rdar://problem/13555154>
Created attachment 196115 [details] Patch idea Initial stab. Seems to work pretty well on my rMBP, thoughts welcome.
Comment on attachment 196115 [details] Patch idea I ran into an issue where GIF animations can cause the ImageQualityController to punt the HQ repaint indefinitely. Retracting patch for now.
Created attachment 196468 [details] Proposed patch Use a separate flag in ImageQualityController to determine whether we're in the "live window resize optimization" mode.
Attachment 196468 [details] did not pass style-queue: Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebCore/ChangeLog', u'Source/WebCore/rendering/RenderBoxModelObject.cpp']" exit_code: 1 Source/WebCore/rendering/RenderBoxModelObject.cpp:187: An else if statement should be written as an if statement when the prior "if" concludes with a return, break, continue or goto statement. [readability/control_flow] [4] Total errors found: 1 in 2 files If any of these errors are false positives, please file a bug against check-webkit-style.
Comment on attachment 196468 [details] Proposed patch r=me
Comment on attachment 196468 [details] Proposed patch View in context: https://bugs.webkit.org/attachment.cgi?id=196468&action=review > Source/WebCore/rendering/RenderBoxModelObject.cpp:192 > + return true; > + } else if (m_liveResizeOptimizationIsActive) { No need for else after return.
Committed r147638: <http://trac.webkit.org/changeset/147638>