diff options
| -rw-r--r-- | dom/base/nsImageLoadingContent.cpp | 29 | ||||
| -rw-r--r-- | dom/base/nsImageLoadingContent.h | 7 | ||||
| -rw-r--r-- | layout/svg/SVGFEImageFrame.cpp | 6 | ||||
| -rw-r--r-- | 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 d25dd63190..b76bc533f6 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. <feImage>), 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 85db2bd2c9..0764d425ce 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<OnNonvisible>& aNonvisibleAction = Nothing()); diff --git a/layout/svg/SVGFEImageFrame.cpp b/layout/svg/SVGFEImageFrame.cpp index 185096a93c..b1f98c421b 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<nsIImageLoadingContent> imageLoader = diff --git a/layout/svg/nsSVGImageFrame.cpp b/layout/svg/nsSVGImageFrame.cpp index c0a7f9419b..2d6f75d267 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(); } |