From 53cf12d6d808c80c4ce240cbbf8d29344c8ce644 Mon Sep 17 00:00:00 2001 From: janekptacijarabaci Date: Thu, 12 Jul 2018 18:56:16 +0200 Subject: Bug 1346501. Don't mark every image as visible when a frame is created for it --- dom/base/nsImageLoadingContent.cpp | 29 +++++++++++++++++++---------- dom/base/nsImageLoadingContent.h | 7 ++++++- layout/svg/SVGFEImageFrame.cpp | 6 ++++++ layout/svg/nsSVGImageFrame.cpp | 6 ++++++ 4 files changed, 37 insertions(+), 11 deletions(-) diff --git a/dom/base/nsImageLoadingContent.cpp b/dom/base/nsImageLoadingContent.cpp index d25dd6319..b76bc533f 100644 --- a/dom/base/nsImageLoadingContent.cpp +++ b/dom/base/nsImageLoadingContent.cpp @@ -491,8 +491,8 @@ nsImageLoadingContent::FrameCreated(nsIFrame* aFrame) mFrameCreateCalled = true; - TrackImage(mCurrentRequest); - TrackImage(mPendingRequest); + TrackImage(mCurrentRequest, aFrame); + TrackImage(mPendingRequest, aFrame); // We need to make sure that our image request is registered, if it should // be registered. @@ -1486,7 +1486,8 @@ nsImageLoadingContent::OnVisibilityChange(Visibility aNewVisibility, } void -nsImageLoadingContent::TrackImage(imgIRequest* aImage) +nsImageLoadingContent::TrackImage(imgIRequest* aImage, + nsIFrame* aFrame /*= nullptr */) { if (!aImage) return; @@ -1499,13 +1500,21 @@ nsImageLoadingContent::TrackImage(imgIRequest* aImage) return; } - // We only want to track this request if we're visible. Ordinarily we check - // the visible count, but that requires a frame; in cases where - // GetOurPrimaryFrame() cannot obtain a frame (e.g. ), we assume - // we're visible if FrameCreated() was called. - nsIFrame* frame = GetOurPrimaryFrame(); - if ((frame && frame->GetVisibility() == Visibility::APPROXIMATELY_NONVISIBLE) || - (!frame && !mFrameCreateCalled)) { + if (!aFrame) { + aFrame = GetOurPrimaryFrame(); + } + + /* This line is deceptively simple. It hides a lot of subtlety. Before we + * create an nsImageFrame we call nsImageFrame::ShouldCreateImageFrameFor + * to determine if we should create an nsImageFrame or create a frame based + * on the display of the element (ie inline, block, etc). Inline, block, etc + * frames don't register for visibility tracking so they will return UNTRACKED + * from GetVisibility(). So this line is choosing to mark such images as + * visible. Once the image loads we will get an nsImageFrame and the proper + * visibility. This is a pitfall of tracking the visibility on the frames + * instead of the content node. + */ + if (!aFrame || aFrame->GetVisibility() == Visibility::APPROXIMATELY_NONVISIBLE) { return; } diff --git a/dom/base/nsImageLoadingContent.h b/dom/base/nsImageLoadingContent.h index 85db2bd2c..0764d425c 100644 --- a/dom/base/nsImageLoadingContent.h +++ b/dom/base/nsImageLoadingContent.h @@ -364,6 +364,11 @@ protected: * * No-op if aImage is null. * + * @param aFrame If called from FrameCreated the frame passed to FrameCreated. + * This is our frame, but at the time of the FrameCreated call + * our primary frame pointer hasn't been set yet, so this is + * only way to get our frame. + * * @param aNonvisibleAction A requested action if the frame has become * nonvisible. If Nothing(), no action is * requested. If DISCARD_IMAGES is specified, the @@ -371,7 +376,7 @@ protected: * associated with to discard their surfaces if * possible. */ - void TrackImage(imgIRequest* aImage); + void TrackImage(imgIRequest* aImage, nsIFrame* aFrame = nullptr); void UntrackImage(imgIRequest* aImage, const Maybe& aNonvisibleAction = Nothing()); diff --git a/layout/svg/SVGFEImageFrame.cpp b/layout/svg/SVGFEImageFrame.cpp index 185096a93..b1f98c421 100644 --- a/layout/svg/SVGFEImageFrame.cpp +++ b/layout/svg/SVGFEImageFrame.cpp @@ -107,6 +107,12 @@ SVGFEImageFrame::Init(nsIContent* aContent, nsFrame::Init(aContent, aParent, aPrevInFlow); // We assume that feImage's are always visible. + // This call must happen before the FrameCreated. This is because the + // primary frame pointer on our content node isn't set until after this + // function ends, so there is no way for the resulting OnVisibilityChange + // notification to get a frame. FrameCreated has a workaround for this in + // that it passes our frame around so it can be accessed. OnVisibilityChange + // doesn't have that workaround. IncApproximateVisibleCount(); nsCOMPtr imageLoader = diff --git a/layout/svg/nsSVGImageFrame.cpp b/layout/svg/nsSVGImageFrame.cpp index c0a7f9419..2d6f75d26 100644 --- a/layout/svg/nsSVGImageFrame.cpp +++ b/layout/svg/nsSVGImageFrame.cpp @@ -159,6 +159,12 @@ nsSVGImageFrame::Init(nsIContent* aContent, if (GetStateBits() & NS_FRAME_IS_NONDISPLAY) { // Non-display frames are likely to be patterns, masks or the like. // Treat them as always visible. + // This call must happen before the FrameCreated. This is because the + // primary frame pointer on our content node isn't set until after this + // function ends, so there is no way for the resulting OnVisibilityChange + // notification to get a frame. FrameCreated has a workaround for this in + // that it passes our frame around so it can be accessed. OnVisibilityChange + // doesn't have that workaround. IncApproximateVisibleCount(); } -- cgit v1.2.3 From 3945eb4c1d15a3232bb340b7348006a220398ebd Mon Sep 17 00:00:00 2001 From: janekptacijarabaci Date: Thu, 12 Jul 2018 18:57:25 +0200 Subject: Bug 1346501. Remove mFrameCreateCalled from nsImageLoadingContent, it is now unused --- dom/base/nsImageLoadingContent.cpp | 7 +------ dom/base/nsImageLoadingContent.h | 3 --- 2 files changed, 1 insertion(+), 9 deletions(-) diff --git a/dom/base/nsImageLoadingContent.cpp b/dom/base/nsImageLoadingContent.cpp index b76bc533f..0c6c37b44 100644 --- a/dom/base/nsImageLoadingContent.cpp +++ b/dom/base/nsImageLoadingContent.cpp @@ -94,8 +94,7 @@ nsImageLoadingContent::nsImageLoadingContent() mNewRequestsWillNeedAnimationReset(false), mStateChangerDepth(0), mCurrentRequestRegistered(false), - mPendingRequestRegistered(false), - mFrameCreateCalled(false) + mPendingRequestRegistered(false) { if (!nsContentUtils::GetImgLoaderForChannel(nullptr, nullptr)) { mLoadingEnabled = false; @@ -489,8 +488,6 @@ nsImageLoadingContent::FrameCreated(nsIFrame* aFrame) { NS_ASSERTION(aFrame, "aFrame is null"); - mFrameCreateCalled = true; - TrackImage(mCurrentRequest, aFrame); TrackImage(mPendingRequest, aFrame); @@ -513,8 +510,6 @@ nsImageLoadingContent::FrameDestroyed(nsIFrame* aFrame) { NS_ASSERTION(aFrame, "aFrame is null"); - mFrameCreateCalled = false; - // We need to make sure that our image request is deregistered. nsPresContext* presContext = GetFramePresContext(); if (mCurrentRequest) { diff --git a/dom/base/nsImageLoadingContent.h b/dom/base/nsImageLoadingContent.h index 0764d425c..5f7daff72 100644 --- a/dom/base/nsImageLoadingContent.h +++ b/dom/base/nsImageLoadingContent.h @@ -459,9 +459,6 @@ private: // registered with the refresh driver. bool mCurrentRequestRegistered; bool mPendingRequestRegistered; - - // True when FrameCreate has been called but FrameDestroy has not. - bool mFrameCreateCalled; }; #endif // nsImageLoadingContent_h__ -- cgit v1.2.3