wine/gecko
0
0
Fork 0
mirror of https://gitlab.winehq.org/wine/wine-gecko.git synced 2024-09-13 09:24:08 -07:00
Code Issues Packages Projects Releases Wiki Activity

Bug 975033 - If the displayport is too big, it's better to pretend it's not there at all. r=tn

Browse Source
This commit is contained in:
Kartikaya Gupta 2014-02-27 08:42:40 -05:00
parent 4e8b35038d
commit 4e68d36d9d
1 changed files with 25 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

25
layout/generic/nsGfxScrollFrame.cpp
View File

@ -2350,6 +2350,28 @@ ClipListsExceptCaret(nsDisplayListCollection* aLists,
::ClipItemsExceptCaret(aLists->Content(), aBuilder, aClipFrame, aClip);
}
static bool
DisplayportExceedsMaxTextureSize(nsPresContext* aPresContext, const nsRect& aDisplayPort)
{
#ifdef MOZ_WIDGET_GONK
// On B2G we actively run into max texture size limits because the displayport-sizing code
// in the AsyncPanZoomController code is slightly busted (bug 957668 will fix it properly).
// We sometimes end up requesting displayports for which the corresponding layer will be
// larger than the max GL texture size (which we assume to be 4096 here).
// If we run into this case, we should just not use the displayport at all and fall back to
// just making a ScrollInfoLayer so that we use the APZC's synchronous scrolling fallback
// mechanism.
// Note also that if we don't do this here, it is quite likely that the parent B2G process
// will kill this child process to prevent OOMs (see the patch that landed as part of bug
// 965945 for details).
gfxSize resolution = aPresContext->PresShell()->GetCumulativeResolution();
return (aPresContext->AppUnitsToDevPixels(aDisplayPort.width) * resolution.width > 4096) ||
(aPresContext->AppUnitsToDevPixels(aDisplayPort.height) * resolution.height > 4096);
#else
return false;
#endif
}
void
ScrollFrameHelper::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
@ -2420,6 +2442,9 @@ ScrollFrameHelper::BuildDisplayList(nsDisplayListBuilder* aBuilder,
bool usingDisplayport =
nsLayoutUtils::GetDisplayPort(mOuter->GetContent(), &displayPort) &&
!aBuilder->IsForEventDelivery();
if (usingDisplayport && DisplayportExceedsMaxTextureSize(mOuter->PresContext(), displayPort)) {
usingDisplayport = false;
}
if (usingDisplayport) {
dirtyRect = displayPort;
}