Bug 200145 – Subpixel fringes around TextIndicator snapshots at non-integral scale factors

• Component: New Bugs
• Status: RESOLVED FIXED

[Tim Horton]

Subpixel fringes around TextIndicator snapshots at non-integral scale factors

[Tim Horton]

Created attachment 374923 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 374923 [details]
Patch

Clearing flags on attachment: 374923

Committed r247846: <https://trac.webkit.org/changeset/247846>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/53568050>

[Russell Epstein]

It appears that this patch (r247846) broke the following API Test:

TestWebKitAPI.DragAndDropTests.ModernWebArchiveType

Error:

ASSERTION FAILED: !data.contentImageWithHighlight || data.contentImageScaleFactor == snapshotScaleFactor
    ./page/TextIndicator.cpp(172) : bool WebCore::takeSnapshots(WebCore::TextIndicatorData &, WebCore::Frame &, WebCore::IntRect, const Vector<WebCore::FloatRect> &)
    1   0x1833bdca9 WTFCrash
    2   0x187f826fb WTFCrashWithInfo(int, char const*, char const*, int)
    3   0x18b0c192c WebCore::takeSnapshots(WebCore::TextIndicatorData&, WebCore::Frame&, WebCore::IntRect, WTF::Vector<WebCore::FloatRect, 0ul, WTF::CrashOnOverflow, 16ul> const&)
    4   0x18b0bcd8d WebCore::initializeIndicator(WebCore::TextIndicatorData&, WebCore::Frame&, WebCore::Range const&, WebCore::FloatSize, bool)
    5   0x18b0bc442 WebCore::TextIndicator::createWithRange(WebCore::Range const&, unsigned short, WebCore::TextIndicatorPresentationTransition, WebCore::FloatSize)
    6   0x103c77e81 WebKit::WebPage::computeAndSendEditDragSnapshot()
    7   0x103c779cf WebKit::WebPage::didConcludeEditDrag()
    8   0x103bee809 WebKit::WebDragClient::didConcludeEditDrag()
    9   0x18af7b424 WebCore::DragController::performDragOperation(WebCore::DragData const&)
    10  0x104022aaa WebKit::WebPage::performDragControllerAction(WebKit::DragControllerAction, WebCore::DragData const&, WebKit::SandboxExtension::Handle&&, WebKit::SandboxExtension::HandleArray&&)
    11  0x1040f0538 void IPC::callMemberFunctionImpl<WebKit::WebPage, void (WebKit::WebPage::*)(WebKit::DragControllerAction, WebCore::DragData const&, WebKit::SandboxExtension::Handle&&, WebKit::SandboxExtension::HandleArray&&), std::__1::tuple<WebKit::DragControllerAction, WebCore::DragData, WebKit::SandboxExtension::Handle, WebKit::SandboxExtension::HandleArray>, 0ul, 1ul, 2ul, 3ul>(WebKit::WebPage*, void (WebKit::WebPage::*)(WebKit::DragControllerAction, WebCore::DragData const&, WebKit::SandboxExtension::Handle&&, WebKit::SandboxExtension::HandleArray&&), std::__1::tuple<WebKit::DragControllerAction, WebCore::DragData, WebKit::SandboxExtension::Handle, WebKit::SandboxExtension::HandleArray>&&, std::__1::integer_sequence<unsigned long, 0ul, 1ul, 2ul, 3ul>)
    12  0x1040ed730 void IPC::callMemberFunction<WebKit::WebPage, void (WebKit::WebPage::*)(WebKit::DragControllerAction, WebCore::DragData const&, WebKit::SandboxExtension::Handle&&, WebKit::SandboxExtension::HandleArray&&), std::__1::tuple<WebKit::DragControllerAction, WebCore::DragData, WebKit::SandboxExtension::Handle, WebKit::SandboxExtension::HandleArray>, std::__1::integer_sequence<unsigned long, 0ul, 1ul, 2ul, 3ul> >(std::__1::tuple<WebKit::DragControllerAction, WebCore::DragData, WebKit::SandboxExtension::Handle, WebKit::SandboxExtension::HandleArray>&&, WebKit::WebPage*, void (WebKit::WebPage::*)(WebKit::DragControllerAction, WebCore::DragData const&, WebKit::SandboxExtension::Handle&&, WebKit::SandboxExtension::HandleArray&&))
    13  0x10408928b void IPC::handleMessage<Messages::WebPage::PerformDragControllerAction, WebKit::WebPage, void (WebKit::WebPage::*)(WebKit::DragControllerAction, WebCore::DragData const&, WebKit::SandboxExtension::Handle&&, WebKit::SandboxExtension::HandleArray&&)>(IPC::Decoder&, WebKit::WebPage*, void (WebKit::WebPage::*)(WebKit::DragControllerAction, WebCore::DragData const&, WebKit::SandboxExtension::Handle&&, WebKit::SandboxExtension::HandleArray&&))
    14  0x10407950e WebKit::WebPage::didReceiveWebPageMessage(IPC::Connection&, IPC::Decoder&)
    15  0x104025988 WebKit::WebPage::didReceiveMessage(IPC::Connection&, IPC::Decoder&)
    16  0x102e9a7c9 IPC::MessageReceiverMap::dispatchMessage(IPC::Connection&, IPC::Decoder&)
    17  0x103c0fa2d WebKit::WebProcess::didReceiveMessage(IPC::Connection&, IPC::Decoder&)
    18  0x102e2dcf9 IPC::Connection::dispatchMessage(IPC::Decoder&)
    19  0x102e26a7b IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)
    20  0x102e2e803 IPC::Connection::dispatchOneIncomingMessage()
    21  0x102e4cd9b IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)::$_11::operator()()
    22  0x102e4ccb9 WTF::Detail::CallableWrapper<IPC::Connection::enqueueIncomingMessage(std::__1::unique_ptr<IPC::Decoder, std::__1::default_delete<IPC::Decoder> >)::$_11, void>::call()
    23  0x1833eaaea WTF::Function<void ()>::operator()() const
    24  0x1834558e3 WTF::RunLoop::performWork()
    25  0x183456cce WTF::RunLoop::performWork(void*)
    26  0x10c742be1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__
    27  0x10c742463 __CFRunLoopDoSources0
    28  0x10c73cb1f __CFRunLoopRun
    29  0x10c73c302 CFRunLoopRunSpecific
    30  0x102888044 -[NSRunLoop(NSRunLoop) runMode:beforeDate:]
    31  0x1028881e4 -[NSRunLoop(NSRunLoop) run]
    ERROR: Failed to load accessibility bundle at /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/Library/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRootSystem/Library/AccessibilityBundles/WebProcessLoader.axbundle: (null)
    /Volumes/Data/slave/ios-simulator-12-debug/build/Source/WebKit/WebProcess/cocoa/WebProcessCocoa.mm(331) : void WebKit::registerWithAccessibility()
TestWebKitAPI.DragAndDropTests.ModernWebArchiveType Timeout

[Ryan Haddad]

https://trac.webkit.org/changeset/248028/webkit was landed to address the test failure.