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gecko-dev/layout/generic/nsVideoFrame.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* rendering object for the HTML <video> element */
#include "nsVideoFrame.h"
#include "nsCOMPtr.h"
#include "nsGkAtoms.h"
#include "mozilla/PresShell.h"
#include "mozilla/dom/HTMLImageElement.h"
#include "mozilla/dom/HTMLVideoElement.h"
#include "mozilla/dom/ShadowRoot.h"
#include "mozilla/layers/RenderRootStateManager.h"
#include "nsDisplayList.h"
#include "nsGenericHTMLElement.h"
#include "nsPresContext.h"
#include "nsContentCreatorFunctions.h"
#include "nsIContentInlines.h"
#include "nsImageFrame.h"
#include "nsIImageLoadingContent.h"
#include "nsContentUtils.h"
#include "nsLayoutUtils.h"
#include "ImageContainer.h"
#include "nsStyleUtil.h"
#include <algorithm>
using namespace mozilla;
using namespace mozilla::layers;
using namespace mozilla::dom;
using namespace mozilla::gfx;
nsIFrame* NS_NewHTMLVideoFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
return new (aPresShell) nsVideoFrame(aStyle, aPresShell->GetPresContext());
}
NS_IMPL_FRAMEARENA_HELPERS(nsVideoFrame)
// A matrix to obtain a correct-rotated video frame.
static Matrix ComputeRotationMatrix(gfxFloat aRotatedWidth,
gfxFloat aRotatedHeight,
VideoInfo::Rotation aDegrees) {
Matrix shiftVideoCenterToOrigin;
if (aDegrees == VideoInfo::Rotation::kDegree_90 ||
aDegrees == VideoInfo::Rotation::kDegree_270) {
shiftVideoCenterToOrigin =
Matrix::Translation(-aRotatedHeight / 2.0, -aRotatedWidth / 2.0);
} else {
shiftVideoCenterToOrigin =
Matrix::Translation(-aRotatedWidth / 2.0, -aRotatedHeight / 2.0);
}
auto angle = static_cast<double>(aDegrees) / 180.0 * M_PI;
Matrix rotation = Matrix::Rotation(static_cast<gfx::Float>(angle));
Matrix shiftLeftTopToOrigin =
Matrix::Translation(aRotatedWidth / 2.0, aRotatedHeight / 2.0);
return shiftVideoCenterToOrigin * rotation * shiftLeftTopToOrigin;
}
static void SwapScaleWidthHeightForRotation(IntSize& aSize,
VideoInfo::Rotation aDegrees) {
if (aDegrees == VideoInfo::Rotation::kDegree_90 ||
aDegrees == VideoInfo::Rotation::kDegree_270) {
int32_t tmpWidth = aSize.width;
aSize.width = aSize.height;
aSize.height = tmpWidth;
}
}
nsVideoFrame::nsVideoFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: nsContainerFrame(aStyle, aPresContext, kClassID) {
EnableVisibilityTracking();
}
nsVideoFrame::~nsVideoFrame() = default;
NS_QUERYFRAME_HEAD(nsVideoFrame)
NS_QUERYFRAME_ENTRY(nsVideoFrame)
NS_QUERYFRAME_ENTRY(nsIAnonymousContentCreator)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
nsresult nsVideoFrame::CreateAnonymousContent(
nsTArray<ContentInfo>& aElements) {
nsNodeInfoManager* nodeInfoManager =
GetContent()->GetComposedDoc()->NodeInfoManager();
RefPtr<NodeInfo> nodeInfo;
if (HasVideoElement()) {
// Create an anonymous image element as a child to hold the poster
// image. We may not have a poster image now, but one could be added
// before we load, or on a subsequent load.
nodeInfo = nodeInfoManager->GetNodeInfo(
nsGkAtoms::img, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);
NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
mPosterImage = NS_NewHTMLImageElement(nodeInfo.forget());
NS_ENSURE_TRUE(mPosterImage, NS_ERROR_OUT_OF_MEMORY);
UpdatePosterSource(false);
// XXX(Bug 1631371) Check if this should use a fallible operation as it
// pretended earlier.
aElements.AppendElement(mPosterImage);
// Set up the caption overlay div for showing any TextTrack data
nodeInfo = nodeInfoManager->GetNodeInfo(
nsGkAtoms::div, nullptr, kNameSpaceID_XHTML, nsINode::ELEMENT_NODE);
NS_ENSURE_TRUE(nodeInfo, NS_ERROR_OUT_OF_MEMORY);
mCaptionDiv = NS_NewHTMLDivElement(nodeInfo.forget());
NS_ENSURE_TRUE(mCaptionDiv, NS_ERROR_OUT_OF_MEMORY);
nsGenericHTMLElement* div =
static_cast<nsGenericHTMLElement*>(mCaptionDiv.get());
div->SetClassName(u"caption-box"_ns);
// XXX(Bug 1631371) Check if this should use a fallible operation as it
// pretended earlier.
aElements.AppendElement(mCaptionDiv);
UpdateTextTrack();
}
return NS_OK;
}
void nsVideoFrame::AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,
uint32_t aFliter) {
if (mPosterImage) {
aElements.AppendElement(mPosterImage);
}
if (mCaptionDiv) {
aElements.AppendElement(mCaptionDiv);
}
}
nsIContent* nsVideoFrame::GetVideoControls() const {
if (!mContent->GetShadowRoot()) {
return nullptr;
}
// The video controls <div> is the only child of the UA Widget Shadow Root
// if it is present. It is only lazily inserted into the DOM when
// the controls attribute is set.
MOZ_ASSERT(mContent->GetShadowRoot()->IsUAWidget());
MOZ_ASSERT(1 >= mContent->GetShadowRoot()->GetChildCount());
return mContent->GetShadowRoot()->GetFirstChild();
}
void nsVideoFrame::Destroy(DestroyContext& aContext) {
if (mReflowCallbackPosted) {
PresShell()->CancelReflowCallback(this);
}
aContext.AddAnonymousContent(mCaptionDiv.forget());
aContext.AddAnonymousContent(mPosterImage.forget());
nsContainerFrame::Destroy(aContext);
}
class DispatchResizeEvent : public Runnable {
public:
explicit DispatchResizeEvent(nsIContent* aContent,
const nsLiteralString& aName)
: Runnable("DispatchResizeEvent"), mContent(aContent), mName(aName) {}
NS_IMETHOD Run() override {
nsContentUtils::DispatchTrustedEvent(mContent->OwnerDoc(), mContent, mName,
CanBubble::eNo, Cancelable::eNo);
return NS_OK;
}
nsCOMPtr<nsIContent> mContent;
const nsLiteralString mName;
};
bool nsVideoFrame::ReflowFinished() {
mReflowCallbackPosted = false;
auto GetSize = [&](nsIContent* aContent) -> Maybe<nsSize> {
if (!aContent) {
return Nothing();
}
nsIFrame* f = aContent->GetPrimaryFrame();
if (!f) {
return Nothing();
}
return Some(f->GetSize());
};
AutoTArray<nsCOMPtr<nsIRunnable>, 2> events;
if (auto size = GetSize(mCaptionDiv)) {
if (*size != mCaptionTrackedSize) {
mCaptionTrackedSize = *size;
events.AppendElement(
new DispatchResizeEvent(mCaptionDiv, u"resizecaption"_ns));
}
}
nsIContent* controls = GetVideoControls();
if (auto size = GetSize(controls)) {
if (*size != mControlsTrackedSize) {
mControlsTrackedSize = *size;
events.AppendElement(
new DispatchResizeEvent(controls, u"resizevideocontrols"_ns));
}
}
for (auto& event : events) {
nsContentUtils::AddScriptRunner(event.forget());
}
return false;
}
void nsVideoFrame::Reflow(nsPresContext* aPresContext, ReflowOutput& aMetrics,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsVideoFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aMetrics, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
NS_FRAME_TRACE(
NS_FRAME_TRACE_CALLS,
("enter nsVideoFrame::Reflow: availSize=%d,%d",
aReflowInput.AvailableISize(), aReflowInput.AvailableBSize()));
MOZ_ASSERT(HasAnyStateBits(NS_FRAME_IN_REFLOW), "frame is not in reflow");
const WritingMode myWM = aReflowInput.GetWritingMode();
nscoord contentBoxBSize = aReflowInput.ComputedBSize();
const auto logicalBP = aReflowInput.ComputedLogicalBorderPadding(myWM);
const nscoord borderBoxISize =
aReflowInput.ComputedISize() + logicalBP.IStartEnd(myWM);
const bool isBSizeShrinkWrapping = (contentBoxBSize == NS_UNCONSTRAINEDSIZE);
nscoord borderBoxBSize;
if (!isBSizeShrinkWrapping) {
borderBoxBSize = contentBoxBSize + logicalBP.BStartEnd(myWM);
}
nsIContent* videoControlsDiv = GetVideoControls();
// Reflow the child frames. We may have up to three: an image
// frame (for the poster image), a container frame for the controls,
// and a container frame for the caption.
for (nsIFrame* child : mFrames) {
nsSize oldChildSize = child->GetSize();
nsReflowStatus childStatus;
const WritingMode childWM = child->GetWritingMode();
LogicalSize availableSize = aReflowInput.ComputedSize(childWM);
availableSize.BSize(childWM) = NS_UNCONSTRAINEDSIZE;
ReflowInput kidReflowInput(aPresContext, aReflowInput, child,
availableSize);
ReflowOutput kidDesiredSize(myWM);
const nsSize containerSize =
aReflowInput.ComputedSizeAsContainerIfConstrained();
if (child->GetContent() == mPosterImage) {
// Reflow the poster frame.
const LogicalPoint childOrigin = logicalBP.StartOffset(myWM);
const LogicalSize posterRenderSize = aReflowInput.ComputedSize(childWM);
kidReflowInput.SetComputedISize(posterRenderSize.ISize(childWM));
kidReflowInput.SetComputedBSize(posterRenderSize.BSize(childWM));
ReflowChild(child, aPresContext, kidDesiredSize, kidReflowInput, myWM,
childOrigin, containerSize, ReflowChildFlags::Default,
childStatus);
MOZ_ASSERT(childStatus.IsFullyComplete(),
"We gave our child unconstrained available block-size, "
"so it should be complete!");
FinishReflowChild(child, aPresContext, kidDesiredSize, &kidReflowInput,
myWM, childOrigin, containerSize,
ReflowChildFlags::Default);
} else if (child->GetContent() == mCaptionDiv ||
child->GetContent() == videoControlsDiv) {
// Reflow the caption and control bar frames.
const LogicalPoint childOrigin = logicalBP.StartOffset(myWM);
ReflowChild(child, aPresContext, kidDesiredSize, kidReflowInput, myWM,
childOrigin, containerSize, ReflowChildFlags::Default,
childStatus);
MOZ_ASSERT(childStatus.IsFullyComplete(),
"We gave our child unconstrained available block-size, "
"so it should be complete!");
if (child->GetContent() == videoControlsDiv && isBSizeShrinkWrapping) {
// Resolve our own BSize based on the controls' size in the
// same axis. Unless we're size-contained, in which case we
// have to behave as if we have an intrinsic size of 0.
if (GetContainSizeAxes().mBContained) {
contentBoxBSize = 0;
} else {
contentBoxBSize = kidDesiredSize.BSize(myWM);
}
}
FinishReflowChild(child, aPresContext, kidDesiredSize, &kidReflowInput,
myWM, childOrigin, containerSize,
ReflowChildFlags::Default);
if (child->GetSize() != oldChildSize) {
// We might find non-primary frames in printing due to
// ReplicateFixedFrames, but we don't care about that.
MOZ_ASSERT(child->IsPrimaryFrame() ||
PresContext()->IsPrintingOrPrintPreview(),
"We only look at the primary frame in ReflowFinished");
if (!mReflowCallbackPosted) {
mReflowCallbackPosted = true;
PresShell()->PostReflowCallback(this);
}
}
} else {
NS_ERROR("Unexpected extra child frame in nsVideoFrame; skipping");
}
}
if (isBSizeShrinkWrapping) {
if (contentBoxBSize == NS_UNCONSTRAINEDSIZE) {
// We didn't get a BSize from our intrinsic size/ratio, nor did we
// get one from our controls. Just use BSize of 0.
contentBoxBSize = 0;
}
contentBoxBSize = aReflowInput.ApplyMinMaxBSize(contentBoxBSize);
borderBoxBSize = contentBoxBSize + logicalBP.BStartEnd(myWM);
}
LogicalSize logicalDesiredSize(myWM, borderBoxISize, borderBoxBSize);
aMetrics.SetSize(myWM, logicalDesiredSize);
aMetrics.SetOverflowAreasToDesiredBounds();
FinishAndStoreOverflow(&aMetrics);
NS_FRAME_TRACE(NS_FRAME_TRACE_CALLS, ("exit nsVideoFrame::Reflow: size=%d,%d",
aMetrics.Width(), aMetrics.Height()));
MOZ_ASSERT(aStatus.IsEmpty(), "This type of frame can't be split.");
}
#ifdef ACCESSIBILITY
a11y::AccType nsVideoFrame::AccessibleType() { return a11y::eHTMLMediaType; }
#endif
#ifdef DEBUG_FRAME_DUMP
nsresult nsVideoFrame::GetFrameName(nsAString& aResult) const {
return MakeFrameName(u"HTMLVideo"_ns, aResult);
}
#endif
nsIFrame::SizeComputationResult nsVideoFrame::ComputeSize(
gfxContext* aRenderingContext, WritingMode aWM, const LogicalSize& aCBSize,
nscoord aAvailableISize, const LogicalSize& aMargin,
const LogicalSize& aBorderPadding, const StyleSizeOverrides& aSizeOverrides,
ComputeSizeFlags aFlags) {
if (!HasVideoElement()) {
return nsContainerFrame::ComputeSize(
aRenderingContext, aWM, aCBSize, aAvailableISize, aMargin,
aBorderPadding, aSizeOverrides, aFlags);
}
return {ComputeSizeWithIntrinsicDimensions(
aRenderingContext, aWM, GetIntrinsicSize(), GetAspectRatio(),
aCBSize, aMargin, aBorderPadding, aSizeOverrides, aFlags),
AspectRatioUsage::None};
}
nscoord nsVideoFrame::GetMinISize(gfxContext* aRenderingContext) {
nscoord result;
// Bind the result variable to a RAII-based debug object - the variable
// therefore must match the function's return value.
DISPLAY_MIN_INLINE_SIZE(this, result);
// This call handles size-containment
nsSize size = GetIntrinsicSize().ToSize().valueOr(nsSize());
result = GetWritingMode().IsVertical() ? size.height : size.width;
return result;
}
nscoord nsVideoFrame::GetPrefISize(gfxContext* aRenderingContext) {
// <audio> / <video> has the same min / pref ISize.
return GetMinISize(aRenderingContext);
}
Maybe<nsSize> nsVideoFrame::PosterImageSize() const {
// Use the poster image frame's size.
nsIFrame* child = GetPosterImage()->GetPrimaryFrame();
return child->GetIntrinsicSize().ToSize();
}
AspectRatio nsVideoFrame::GetIntrinsicRatio() const {
if (!HasVideoElement()) {
// Audio elements have no intrinsic ratio.
return AspectRatio();
}
// 'contain:[inline-]size' replaced elements have no intrinsic ratio.
if (GetContainSizeAxes().IsAny()) {
return AspectRatio();
}
auto* element = static_cast<HTMLVideoElement*>(GetContent());
if (Maybe<CSSIntSize> size = element->GetVideoSize()) {
return AspectRatio::FromSize(*size);
}
if (ShouldDisplayPoster()) {
if (Maybe<nsSize> imgSize = PosterImageSize()) {
return AspectRatio::FromSize(*imgSize);
}
}
if (StylePosition()->mAspectRatio.HasRatio()) {
return AspectRatio();
}
return AspectRatio::FromSize(kFallbackIntrinsicSizeInPixels);
}
bool nsVideoFrame::ShouldDisplayPoster() const {
if (!HasVideoElement()) {
return false;
}
auto* element = static_cast<HTMLVideoElement*>(GetContent());
if (element->GetPlayedOrSeeked() && HasVideoData()) {
return false;
}
nsCOMPtr<nsIImageLoadingContent> imgContent = do_QueryInterface(mPosterImage);
NS_ENSURE_TRUE(imgContent, false);
nsCOMPtr<imgIRequest> request;
nsresult res = imgContent->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(request));
if (NS_FAILED(res) || !request) {
return false;
}
uint32_t status = 0;
res = request->GetImageStatus(&status);
if (NS_FAILED(res) || (status & imgIRequest::STATUS_ERROR)) return false;
return true;
}
IntrinsicSize nsVideoFrame::GetIntrinsicSize() {
const auto containAxes = GetContainSizeAxes();
const auto isVideo = HasVideoElement();
// Intrinsic size will be given by contain-intrinsic-size if the element is
// size-contained. If both axes have containment, ContainIntrinsicSize() will
// ignore the fallback size argument, so we can just pass no intrinsic size,
// or whatever.
if (containAxes.IsBoth()) {
return containAxes.ContainIntrinsicSize({}, *this);
}
if (!isVideo) {
// An audio element with no "controls" attribute, distinguished by the last
// and only child being the control, falls back to no intrinsic size.
if (!mFrames.LastChild()) {
return containAxes.ContainIntrinsicSize({}, *this);
}
return containAxes.ContainIntrinsicSize(
IntrinsicSize(kFallbackIntrinsicSize), *this);
}
auto* element = static_cast<HTMLVideoElement*>(GetContent());
if (Maybe<CSSIntSize> size = element->GetVideoSize()) {
return containAxes.ContainIntrinsicSize(
IntrinsicSize(CSSPixel::ToAppUnits(*size)), *this);
}
if (ShouldDisplayPoster()) {
if (Maybe<nsSize> imgSize = PosterImageSize()) {
return containAxes.ContainIntrinsicSize(IntrinsicSize(*imgSize), *this);
}
}
if (StylePosition()->mAspectRatio.HasRatio()) {
return {};
}
return containAxes.ContainIntrinsicSize(IntrinsicSize(kFallbackIntrinsicSize),
*this);
}
void nsVideoFrame::UpdatePosterSource(bool aNotify) {
NS_ASSERTION(HasVideoElement(), "Only call this on <video> elements.");
HTMLVideoElement* element = static_cast<HTMLVideoElement*>(GetContent());
if (element->HasAttr(nsGkAtoms::poster) &&
!element->AttrValueIs(kNameSpaceID_None, nsGkAtoms::poster,
nsGkAtoms::_empty, eIgnoreCase)) {
nsAutoString posterStr;
element->GetPoster(posterStr);
mPosterImage->SetAttr(kNameSpaceID_None, nsGkAtoms::src, posterStr,
aNotify);
} else {
mPosterImage->UnsetAttr(kNameSpaceID_None, nsGkAtoms::src, aNotify);
}
}
nsresult nsVideoFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute, int32_t aModType) {
if (aAttribute == nsGkAtoms::poster && HasVideoElement()) {
UpdatePosterSource(true);
}
return nsContainerFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
void nsVideoFrame::OnVisibilityChange(
Visibility aNewVisibility, const Maybe<OnNonvisible>& aNonvisibleAction) {
if (HasVideoElement()) {
static_cast<HTMLMediaElement*>(GetContent())
->OnVisibilityChange(aNewVisibility);
}
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(mPosterImage);
if (imageLoader) {
imageLoader->OnVisibilityChange(aNewVisibility, aNonvisibleAction);
}
nsContainerFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
}
bool nsVideoFrame::HasVideoElement() const {
return static_cast<HTMLMediaElement*>(GetContent())->IsVideo();
}
bool nsVideoFrame::HasVideoData() const {
if (!HasVideoElement()) {
return false;
}
auto* element = static_cast<HTMLVideoElement*>(GetContent());
return element->GetVideoSize().isSome();
}
void nsVideoFrame::UpdateTextTrack() {
static_cast<HTMLMediaElement*>(GetContent())->NotifyCueDisplayStatesChanged();
}
namespace mozilla {
class nsDisplayVideo : public nsPaintedDisplayItem {
public:
nsDisplayVideo(nsDisplayListBuilder* aBuilder, nsVideoFrame* aFrame)
: nsPaintedDisplayItem(aBuilder, aFrame) {
MOZ_COUNT_CTOR(nsDisplayVideo);
}
MOZ_COUNTED_DTOR_OVERRIDE(nsDisplayVideo)
NS_DISPLAY_DECL_NAME("Video", TYPE_VIDEO)
already_AddRefed<ImageContainer> GetImageContainer(gfxRect& aDestGFXRect) {
nsRect area = Frame()->GetContentRectRelativeToSelf() + ToReferenceFrame();
HTMLVideoElement* element =
static_cast<HTMLVideoElement*>(Frame()->GetContent());
Maybe<CSSIntSize> videoSizeInPx = element->GetVideoSize();
if (videoSizeInPx.isNothing() || area.IsEmpty()) {
return nullptr;
}
RefPtr<ImageContainer> container = element->GetImageContainer();
if (!container) {
return nullptr;
}
// Retrieve the size of the decoded video frame, before being scaled
// by pixel aspect ratio.
mozilla::gfx::IntSize frameSize = container->GetCurrentSize();
if (frameSize.width == 0 || frameSize.height == 0) {
// No image, or zero-sized image. Don't render.
return nullptr;
}
const auto aspectRatio = AspectRatio::FromSize(*videoSizeInPx);
const IntrinsicSize intrinsicSize(CSSPixel::ToAppUnits(*videoSizeInPx));
nsRect dest = nsLayoutUtils::ComputeObjectDestRect(
area, intrinsicSize, aspectRatio, Frame()->StylePosition());
aDestGFXRect = Frame()->PresContext()->AppUnitsToGfxUnits(dest);
aDestGFXRect.Round();
if (aDestGFXRect.IsEmpty()) {
return nullptr;
}
return container.forget();
}
virtual bool CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const mozilla::layers::StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder) override {
HTMLVideoElement* element =
static_cast<HTMLVideoElement*>(Frame()->GetContent());
gfxRect destGFXRect;
RefPtr<ImageContainer> container = GetImageContainer(destGFXRect);
if (!container) {
return true;
}
container->SetRotation(element->RotationDegrees());
// If the image container is empty, we don't want to fallback. Any other
// failure will be due to resource constraints and fallback is unlikely to
// help us. Hence we can ignore the return value from PushImage.
LayoutDeviceRect rect(destGFXRect.x, destGFXRect.y, destGFXRect.width,
destGFXRect.height);
aManager->CommandBuilder().PushImage(this, container, aBuilder, aResources,
aSc, rect, rect);
return true;
}
// For opaque videos, we will want to override GetOpaqueRegion here.
// This is tracked by bug 1545498.
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder,
bool* aSnap) const override {
*aSnap = true;
nsIFrame* f = Frame();
return f->GetContentRectRelativeToSelf() + ToReferenceFrame();
}
// Only report FirstContentfulPaint when the video is set
bool IsContentful() const override {
nsVideoFrame* f = static_cast<nsVideoFrame*>(Frame());
HTMLVideoElement* video = HTMLVideoElement::FromNode(f->GetContent());
return video->VideoWidth() > 0;
}
virtual void Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx) override {
HTMLVideoElement* element =
static_cast<HTMLVideoElement*>(Frame()->GetContent());
gfxRect destGFXRect;
RefPtr<ImageContainer> container = GetImageContainer(destGFXRect);
if (!container) {
return;
}
VideoInfo::Rotation rotationDeg = element->RotationDegrees();
Matrix preTransform = ComputeRotationMatrix(
destGFXRect.Width(), destGFXRect.Height(), rotationDeg);
Matrix transform =
preTransform * Matrix::Translation(destGFXRect.x, destGFXRect.y);
AutoLockImage autoLock(container);
Image* image = autoLock.GetImage(TimeStamp::Now());
if (!image) {
return;
}
RefPtr<gfx::SourceSurface> surface = image->GetAsSourceSurface();
if (!surface || !surface->IsValid()) {
return;
}
gfx::IntSize size = surface->GetSize();
IntSize scaleToSize(static_cast<int32_t>(destGFXRect.Width()),
static_cast<int32_t>(destGFXRect.Height()));
// scaleHint is set regardless of rotation, so swap w/h if needed.
SwapScaleWidthHeightForRotation(scaleToSize, rotationDeg);
transform.PreScale(scaleToSize.width / double(size.Width()),
scaleToSize.height / double(size.Height()));
gfxContextMatrixAutoSaveRestore saveMatrix(aCtx);
aCtx->SetMatrix(
gfxUtils::SnapTransformTranslation(aCtx->CurrentMatrix(), nullptr));
transform = gfxUtils::SnapTransform(
transform, gfxRect(0, 0, size.width, size.height), nullptr);
aCtx->Multiply(ThebesMatrix(transform));
aCtx->GetDrawTarget()->FillRect(
Rect(0, 0, size.width, size.height),
SurfacePattern(surface, ExtendMode::CLAMP, Matrix(),
nsLayoutUtils::GetSamplingFilterForFrame(Frame())),
DrawOptions());
}
};
} // namespace mozilla
void nsVideoFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
if (!IsVisibleForPainting()) return;
DO_GLOBAL_REFLOW_COUNT_DSP("nsVideoFrame");
DisplayBorderBackgroundOutline(aBuilder, aLists);
if (HidesContent()) {
return;
}
const bool shouldDisplayPoster = ShouldDisplayPoster();
// NOTE: If we're displaying a poster image (instead of video data), we can
// trust the nsImageFrame to constrain its drawing to its content rect
// (which happens to be the same as our content rect).
uint32_t clipFlags;
if (shouldDisplayPoster ||
!nsStyleUtil::ObjectPropsMightCauseOverflow(StylePosition())) {
clipFlags = DisplayListClipState::ASSUME_DRAWING_RESTRICTED_TO_CONTENT_RECT;
} else {
clipFlags = 0;
}
DisplayListClipState::AutoClipContainingBlockDescendantsToContentBox clip(
aBuilder, this, clipFlags);
if (HasVideoElement() && !shouldDisplayPoster) {
aLists.Content()->AppendNewToTop<nsDisplayVideo>(aBuilder, this);
}
// Add child frames to display list. We expect various children,
// but only want to draw mPosterImage conditionally. Others we
// always add to the display list.
for (nsIFrame* child : mFrames) {
if (child->GetContent() != mPosterImage || shouldDisplayPoster) {
nsDisplayListBuilder::AutoBuildingDisplayList buildingForChild(
aBuilder, child,
aBuilder->GetVisibleRect() - child->GetOffsetTo(this),
aBuilder->GetDirtyRect() - child->GetOffsetTo(this));
child->BuildDisplayListForStackingContext(aBuilder, aLists.Content());
}
}
}
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