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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/. */
#include "SVGImageFrame.h"
// Keep in (case-insensitive) order:
#include "gfxContext.h"
#include "gfxPlatform.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/image/WebRenderImageProvider.h"
#include "mozilla/layers/RenderRootStateManager.h"
#include "mozilla/layers/WebRenderLayerManager.h"
#include "imgIContainer.h"
#include "ImageRegion.h"
#include "nsContainerFrame.h"
#include "nsIImageLoadingContent.h"
#include "nsLayoutUtils.h"
#include "imgINotificationObserver.h"
#include "SVGGeometryProperty.h"
#include "SVGGeometryFrame.h"
#include "mozilla/PresShell.h"
#include "mozilla/StaticPrefs_image.h"
#include "mozilla/SVGContentUtils.h"
#include "mozilla/SVGImageContext.h"
#include "mozilla/SVGObserverUtils.h"
#include "mozilla/SVGUtils.h"
#include "mozilla/dom/MutationEventBinding.h"
#include "mozilla/dom/SVGImageElement.h"
#include "nsIReflowCallback.h"
#include "mozilla/Unused.h"
using namespace mozilla::dom;
using namespace mozilla::gfx;
using namespace mozilla::image;
using namespace mozilla::dom::SVGPreserveAspectRatio_Binding;
namespace SVGT = SVGGeometryProperty::Tags;
namespace mozilla {
class SVGImageListener final : public imgINotificationObserver {
public:
explicit SVGImageListener(SVGImageFrame* aFrame);
NS_DECL_ISUPPORTS
NS_DECL_IMGINOTIFICATIONOBSERVER
void SetFrame(SVGImageFrame* frame) { mFrame = frame; }
private:
~SVGImageListener() = default;
SVGImageFrame* mFrame;
};
// ---------------------------------------------------------------------
// nsQueryFrame methods
NS_QUERYFRAME_HEAD(SVGImageFrame)
NS_QUERYFRAME_ENTRY(SVGImageFrame)
NS_QUERYFRAME_TAIL_INHERITING(SVGGeometryFrame)
} // namespace mozilla
nsIFrame* NS_NewSVGImageFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle) {
return new (aPresShell)
mozilla::SVGImageFrame(aStyle, aPresShell->GetPresContext());
}
namespace mozilla {
NS_IMPL_FRAMEARENA_HELPERS(SVGImageFrame)
SVGImageFrame::~SVGImageFrame() {
// set the frame to null so we don't send messages to a dead object.
if (mListener) {
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(GetContent());
if (imageLoader) {
imageLoader->RemoveNativeObserver(mListener);
}
reinterpret_cast<SVGImageListener*>(mListener.get())->SetFrame(nullptr);
}
mListener = nullptr;
}
void SVGImageFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) {
NS_ASSERTION(aContent->IsSVGElement(nsGkAtoms::image),
"Content is not an SVG image!");
SVGGeometryFrame::Init(aContent, aParent, aPrevInFlow);
if (HasAnyStateBits(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();
}
mListener = new SVGImageListener(this);
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(GetContent());
if (!imageLoader) {
MOZ_CRASH("Why is this not an image loading content?");
}
// We should have a PresContext now, so let's notify our image loader that
// we need to register any image animations with the refresh driver.
imageLoader->FrameCreated(this);
imageLoader->AddNativeObserver(mListener);
}
/* virtual */
void SVGImageFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
if (HasAnyStateBits(NS_FRAME_IS_NONDISPLAY)) {
DecApproximateVisibleCount();
}
if (mReflowCallbackPosted) {
PresShell()->CancelReflowCallback(this);
mReflowCallbackPosted = false;
}
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(nsIFrame::mContent);
if (imageLoader) {
imageLoader->FrameDestroyed(this);
}
nsIFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
/* virtual */
void SVGImageFrame::DidSetComputedStyle(ComputedStyle* aOldStyle) {
SVGGeometryFrame::DidSetComputedStyle(aOldStyle);
if (!mImageContainer || !aOldStyle) {
return;
}
auto newOrientation = StyleVisibility()->mImageOrientation;
if (aOldStyle->StyleVisibility()->mImageOrientation != newOrientation) {
nsCOMPtr<imgIContainer> image(mImageContainer->Unwrap());
mImageContainer = nsLayoutUtils::OrientImage(image, newOrientation);
}
// TODO(heycam): We should handle aspect-ratio, like nsImageFrame does.
}
//----------------------------------------------------------------------
// nsIFrame methods:
nsresult SVGImageFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute, int32_t aModType) {
if (aNameSpaceID == kNameSpaceID_None) {
if (aAttribute == nsGkAtoms::preserveAspectRatio) {
// We don't paint the content of the image using display lists, therefore
// we have to invalidate for this children-only transform changes since
// there is no layer tree to notice that the transform changed and
// recomposite.
InvalidateFrame();
return NS_OK;
}
}
// Currently our SMIL implementation does not modify the DOM attributes. Once
// we implement the SVG 2 SMIL behaviour this can be removed
// SVGImageElement::AfterSetAttr's implementation will be sufficient.
if (aModType == MutationEvent_Binding::SMIL &&
aAttribute == nsGkAtoms::href &&
(aNameSpaceID == kNameSpaceID_XLink ||
aNameSpaceID == kNameSpaceID_None)) {
SVGImageElement* element = static_cast<SVGImageElement*>(GetContent());
bool hrefIsSet =
element->mStringAttributes[SVGImageElement::HREF].IsExplicitlySet() ||
element->mStringAttributes[SVGImageElement::XLINK_HREF]
.IsExplicitlySet();
if (hrefIsSet) {
element->LoadSVGImage(true, true);
} else {
element->CancelImageRequests(true);
}
}
return SVGGeometryFrame::AttributeChanged(aNameSpaceID, aAttribute, aModType);
}
void SVGImageFrame::OnVisibilityChange(
Visibility aNewVisibility, const Maybe<OnNonvisible>& aNonvisibleAction) {
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(GetContent());
if (!imageLoader) {
SVGGeometryFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
return;
}
imageLoader->OnVisibilityChange(aNewVisibility, aNonvisibleAction);
SVGGeometryFrame::OnVisibilityChange(aNewVisibility, aNonvisibleAction);
}
gfx::Matrix SVGImageFrame::GetRasterImageTransform(int32_t aNativeWidth,
int32_t aNativeHeight) {
float x, y, width, height;
SVGImageElement* element = static_cast<SVGImageElement*>(GetContent());
SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, SVGT::Height>(
element, &x, &y, &width, &height);
Matrix viewBoxTM = SVGContentUtils::GetViewBoxTransform(
width, height, 0, 0, aNativeWidth, aNativeHeight,
element->mPreserveAspectRatio);
return viewBoxTM * gfx::Matrix::Translation(x, y);
}
gfx::Matrix SVGImageFrame::GetVectorImageTransform() {
float x, y;
SVGImageElement* element = static_cast<SVGImageElement*>(GetContent());
SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y>(element, &x, &y);
// No viewBoxTM needed here -- our height/width overrides any concept of
// "native size" that the SVG image has, and it will handle viewBox and
// preserveAspectRatio on its own once we give it a region to draw into.
return gfx::Matrix::Translation(x, y);
}
bool SVGImageFrame::GetIntrinsicImageDimensions(
mozilla::gfx::Size& aSize, mozilla::AspectRatio& aAspectRatio) const {
if (!mImageContainer) {
return false;
}
ImageResolution resolution = mImageContainer->GetResolution();
int32_t width, height;
if (NS_FAILED(mImageContainer->GetWidth(&width))) {
aSize.width = -1;
} else {
aSize.width = width;
resolution.ApplyXTo(aSize.width);
}
if (NS_FAILED(mImageContainer->GetHeight(&height))) {
aSize.height = -1;
} else {
aSize.height = height;
resolution.ApplyYTo(aSize.height);
}
Maybe<AspectRatio> asp = mImageContainer->GetIntrinsicRatio();
aAspectRatio = asp.valueOr(AspectRatio{});
return true;
}
bool SVGImageFrame::TransformContextForPainting(gfxContext* aGfxContext,
const gfxMatrix& aTransform) {
gfx::Matrix imageTransform;
if (mImageContainer->GetType() == imgIContainer::TYPE_VECTOR) {
imageTransform = GetVectorImageTransform() * ToMatrix(aTransform);
} else {
int32_t nativeWidth, nativeHeight;
if (NS_FAILED(mImageContainer->GetWidth(&nativeWidth)) ||
NS_FAILED(mImageContainer->GetHeight(&nativeHeight)) ||
nativeWidth == 0 || nativeHeight == 0) {
return false;
}
mImageContainer->GetResolution().ApplyTo(nativeWidth, nativeHeight);
imageTransform = GetRasterImageTransform(nativeWidth, nativeHeight) *
ToMatrix(aTransform);
// NOTE: We need to cancel out the effects of Full-Page-Zoom, or else
// it'll get applied an extra time by DrawSingleUnscaledImage.
nscoord appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
gfxFloat pageZoomFactor =
nsPresContext::AppUnitsToFloatCSSPixels(appUnitsPerDevPx);
imageTransform.PreScale(pageZoomFactor, pageZoomFactor);
}
if (imageTransform.IsSingular()) {
return false;
}
aGfxContext->Multiply(ThebesMatrix(imageTransform));
return true;
}
//----------------------------------------------------------------------
// ISVGDisplayableFrame methods:
void SVGImageFrame::PaintSVG(gfxContext& aContext, const gfxMatrix& aTransform,
imgDrawingParams& aImgParams,
const nsIntRect* aDirtyRect) {
if (!StyleVisibility()->IsVisible()) {
return;
}
float x, y, width, height;
SVGImageElement* imgElem = static_cast<SVGImageElement*>(GetContent());
SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, SVGT::Height>(
imgElem, &x, &y, &width, &height);
NS_ASSERTION(width > 0 && height > 0,
"Should only be painting things with valid width/height");
if (!mImageContainer) {
nsCOMPtr<imgIRequest> currentRequest;
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(GetContent());
if (imageLoader)
imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(currentRequest));
if (currentRequest)
currentRequest->GetImage(getter_AddRefs(mImageContainer));
}
if (mImageContainer) {
gfxContextAutoSaveRestore autoRestorer(&aContext);
if (StyleDisplay()->IsScrollableOverflow()) {
gfxRect clipRect =
SVGUtils::GetClipRectForFrame(this, x, y, width, height);
SVGUtils::SetClipRect(&aContext, aTransform, clipRect);
}
if (!TransformContextForPainting(&aContext, aTransform)) {
return;
}
// fill-opacity doesn't affect <image>, so if we're allowed to
// optimize group opacity, the opacity used for compositing the
// image into the current canvas is just the group opacity.
float opacity = 1.0f;
if (SVGUtils::CanOptimizeOpacity(this)) {
opacity = StyleEffects()->mOpacity;
}
if (opacity != 1.0f ||
StyleEffects()->mMixBlendMode != StyleBlend::Normal) {
aContext.PushGroupForBlendBack(gfxContentType::COLOR_ALPHA, opacity);
}
nscoord appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
nsRect dirtyRect; // only used if aDirtyRect is non-null
if (aDirtyRect) {
NS_ASSERTION(!NS_SVGDisplayListPaintingEnabled() ||
(mState & NS_FRAME_IS_NONDISPLAY),
"Display lists handle dirty rect intersection test");
dirtyRect = ToAppUnits(*aDirtyRect, appUnitsPerDevPx);
// dirtyRect is relative to the outer <svg>, we should transform it
// down to <image>.
Rect dir(dirtyRect.x, dirtyRect.y, dirtyRect.width, dirtyRect.height);
dir.Scale(1.f / AppUnitsPerCSSPixel());
// FIXME: This isn't correct if there is an inner <svg> enclosing
// the <image>. But that seems to be a quite obscure usecase, we can
// add a dedicated utility for that purpose to replace the GetCTM
// here if necessary.
auto mat = SVGContentUtils::GetCTM(
static_cast<SVGImageElement*>(GetContent()), false);
if (mat.IsSingular()) {
return;
}
mat.Invert();
dir = mat.TransformRect(dir);
// x, y offset of <image> is not included in CTM.
dir.MoveBy(-x, -y);
dir.Scale(AppUnitsPerCSSPixel());
dir.Round();
dirtyRect = nsRect(dir.x, dir.y, dir.width, dir.height);
}
uint32_t flags = aImgParams.imageFlags;
if (mForceSyncDecoding) {
flags |= imgIContainer::FLAG_SYNC_DECODE;
}
if (mImageContainer->GetType() == imgIContainer::TYPE_VECTOR) {
// Package up the attributes of this image element which can override the
// attributes of mImageContainer's internal SVG document. The 'width' &
// 'height' values we're passing in here are in CSS units (though they
// come from width/height *attributes* in SVG). They influence the region
// of the SVG image's internal document that is visible, in combination
// with preserveAspectRatio and viewBox.
const SVGImageContext context(
Some(CSSIntSize::Truncate(width, height)),
Some(imgElem->mPreserveAspectRatio.GetAnimValue()));
// For the actual draw operation to draw crisply (and at the right size),
// our destination rect needs to be |width|x|height|, *in dev pixels*.
LayoutDeviceSize devPxSize(width, height);
nsRect destRect(nsPoint(), LayoutDevicePixel::ToAppUnits(
devPxSize, appUnitsPerDevPx));
// Note: Can't use DrawSingleUnscaledImage for the TYPE_VECTOR case.
// That method needs our image to have a fixed native width & height,
// and that's not always true for TYPE_VECTOR images.
aImgParams.result &= nsLayoutUtils::DrawSingleImage(
aContext, PresContext(), mImageContainer,
nsLayoutUtils::GetSamplingFilterForFrame(this), destRect,
aDirtyRect ? dirtyRect : destRect, context, flags);
} else { // mImageContainer->GetType() == TYPE_RASTER
aImgParams.result &= nsLayoutUtils::DrawSingleUnscaledImage(
aContext, PresContext(), mImageContainer,
nsLayoutUtils::GetSamplingFilterForFrame(this), nsPoint(0, 0),
aDirtyRect ? &dirtyRect : nullptr, SVGImageContext(), flags);
}
if (opacity != 1.0f ||
StyleEffects()->mMixBlendMode != StyleBlend::Normal) {
aContext.PopGroupAndBlend();
}
// gfxContextAutoSaveRestore goes out of scope & cleans up our gfxContext
}
}
bool SVGImageFrame::CreateWebRenderCommands(
mozilla::wr::DisplayListBuilder& aBuilder,
mozilla::wr::IpcResourceUpdateQueue& aResources,
const mozilla::layers::StackingContextHelper& aSc,
mozilla::layers::RenderRootStateManager* aManager,
nsDisplayListBuilder* aDisplayListBuilder, DisplaySVGGeometry* aItem,
bool aDryRun) {
if (!StyleVisibility()->IsVisible()) {
return true;
}
float opacity = 1.0f;
if (SVGUtils::CanOptimizeOpacity(this)) {
opacity = StyleEffects()->mOpacity;
}
if (opacity != 1.0f) {
// FIXME: not implemented, might be trivial
return false;
}
if (StyleEffects()->mMixBlendMode != StyleBlend::Normal) {
// FIXME: not implemented
return false;
}
// try to setup the image
if (!mImageContainer) {
nsCOMPtr<imgIRequest> currentRequest;
nsCOMPtr<nsIImageLoadingContent> imageLoader =
do_QueryInterface(GetContent());
if (imageLoader) {
imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
getter_AddRefs(currentRequest));
}
if (currentRequest) {
currentRequest->GetImage(getter_AddRefs(mImageContainer));
}
}
if (!mImageContainer) {
// nothing to draw (yet)
return true;
}
uint32_t flags = aDisplayListBuilder->GetImageDecodeFlags();
if (mForceSyncDecoding) {
flags |= imgIContainer::FLAG_SYNC_DECODE;
}
// Compute bounds of the image
nscoord appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel();
int32_t appUnitsPerCSSPixel = AppUnitsPerCSSPixel();
float x, y, width, height;
SVGImageElement* imgElem = static_cast<SVGImageElement*>(GetContent());
SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, SVGT::Height>(
imgElem, &x, &y, &width, &height);
NS_ASSERTION(width > 0 && height > 0,
"Should only be painting things with valid width/height");
auto toReferenceFrame = aItem->ToReferenceFrame();
auto appRect = nsLayoutUtils::RoundGfxRectToAppRect(Rect(0, 0, width, height),
appUnitsPerCSSPixel);
appRect += toReferenceFrame;
auto destRect = LayoutDeviceRect::FromAppUnits(appRect, appUnitsPerDevPx);
auto clipRect = destRect;
if (StyleDisplay()->IsScrollableOverflow()) {
// Apply potential non-trivial clip
auto cssClip = SVGUtils::GetClipRectForFrame(this, 0, 0, width, height);
auto appClip =
nsLayoutUtils::RoundGfxRectToAppRect(cssClip, appUnitsPerCSSPixel);
appClip += toReferenceFrame;
clipRect = LayoutDeviceRect::FromAppUnits(appClip, appUnitsPerDevPx);
// Apply preserveAspectRatio
if (mImageContainer->GetType() == imgIContainer::TYPE_RASTER) {
int32_t nativeWidth, nativeHeight;
if (NS_FAILED(mImageContainer->GetWidth(&nativeWidth)) ||
NS_FAILED(mImageContainer->GetHeight(&nativeHeight)) ||
nativeWidth == 0 || nativeHeight == 0) {
// Image has no size; nothing to draw
return true;
}
mImageContainer->GetResolution().ApplyTo(nativeWidth, nativeHeight);
auto preserveAspectRatio = imgElem->mPreserveAspectRatio.GetAnimValue();
uint16_t align = preserveAspectRatio.GetAlign();
uint16_t meetOrSlice = preserveAspectRatio.GetMeetOrSlice();
// default to the defaults
if (align == SVG_PRESERVEASPECTRATIO_UNKNOWN) {
align = SVG_PRESERVEASPECTRATIO_XMIDYMID;
}
if (meetOrSlice == SVG_MEETORSLICE_UNKNOWN) {
meetOrSlice = SVG_MEETORSLICE_MEET;
}
// aspect > 1 is horizontal
// aspect < 1 is vertical
float nativeAspect = ((float)nativeWidth) / ((float)nativeHeight);
float viewAspect = width / height;
// "Meet" is "fit image to view"; "Slice" is "cover view with image".
//
// Whether we meet or slice, one side of the destRect will always be
// perfectly spanned by our image. The only questions to answer are
// "which side won't span perfectly" and "should that side be grown
// or shrunk".
//
// Because we fit our image to the destRect, this all just reduces to:
// "if meet, shrink to fit. if slice, grow to fit."
if (align != SVG_PRESERVEASPECTRATIO_NONE && nativeAspect != viewAspect) {
// Slightly redundant bools, but they make the conditions clearer
bool tooTall = nativeAspect > viewAspect;
bool tooWide = nativeAspect < viewAspect;
if ((meetOrSlice == SVG_MEETORSLICE_MEET && tooTall) ||
(meetOrSlice == SVG_MEETORSLICE_SLICE && tooWide)) {
// Adjust height and realign y
auto oldHeight = destRect.height;
destRect.height = destRect.width / nativeAspect;
auto heightChange = oldHeight - destRect.height;
switch (align) {
case SVG_PRESERVEASPECTRATIO_XMINYMIN:
case SVG_PRESERVEASPECTRATIO_XMIDYMIN:
case SVG_PRESERVEASPECTRATIO_XMAXYMIN:
// align to top (no-op)
break;
case SVG_PRESERVEASPECTRATIO_XMINYMID:
case SVG_PRESERVEASPECTRATIO_XMIDYMID:
case SVG_PRESERVEASPECTRATIO_XMAXYMID:
// align to center
destRect.y += heightChange / 2.0f;
break;
case SVG_PRESERVEASPECTRATIO_XMINYMAX:
case SVG_PRESERVEASPECTRATIO_XMIDYMAX:
case SVG_PRESERVEASPECTRATIO_XMAXYMAX:
// align to bottom
destRect.y += heightChange;
break;
default:
MOZ_ASSERT_UNREACHABLE("Unknown value for align");
}
} else if ((meetOrSlice == SVG_MEETORSLICE_MEET && tooWide) ||
(meetOrSlice == SVG_MEETORSLICE_SLICE && tooTall)) {
// Adjust width and realign x
auto oldWidth = destRect.width;
destRect.width = destRect.height * nativeAspect;
auto widthChange = oldWidth - destRect.width;
switch (align) {
case SVG_PRESERVEASPECTRATIO_XMINYMIN:
case SVG_PRESERVEASPECTRATIO_XMINYMID:
case SVG_PRESERVEASPECTRATIO_XMINYMAX:
// align to left (no-op)
break;
case SVG_PRESERVEASPECTRATIO_XMIDYMIN:
case SVG_PRESERVEASPECTRATIO_XMIDYMID:
case SVG_PRESERVEASPECTRATIO_XMIDYMAX:
// align to center
destRect.x += widthChange / 2.0f;
break;
case SVG_PRESERVEASPECTRATIO_XMAXYMIN:
case SVG_PRESERVEASPECTRATIO_XMAXYMID:
case SVG_PRESERVEASPECTRATIO_XMAXYMAX:
// align to right
destRect.x += widthChange;
break;
default:
MOZ_ASSERT_UNREACHABLE("Unknown value for align");
}
}
}
}
}
SVGImageContext svgContext;
if (mImageContainer->GetType() == imgIContainer::TYPE_VECTOR) {
if (StaticPrefs::image_svg_blob_image()) {
flags |= imgIContainer::FLAG_RECORD_BLOB;
}
// Forward preserveAspectRatio to inner SVGs
svgContext.SetViewportSize(Some(CSSIntSize::Truncate(width, height)));
svgContext.SetPreserveAspectRatio(
Some(imgElem->mPreserveAspectRatio.GetAnimValue()));
}
Maybe<ImageIntRegion> region;
IntSize decodeSize = nsLayoutUtils::ComputeImageContainerDrawingParameters(
mImageContainer, this, destRect, clipRect, aSc, flags, svgContext,
region);
RefPtr<image::WebRenderImageProvider> provider;
ImgDrawResult drawResult = mImageContainer->GetImageProvider(
aManager->LayerManager(), decodeSize, svgContext, region, flags,
getter_AddRefs(provider));
// While we got a container, it may not contain a fully decoded surface. If
// that is the case, and we have an image we were previously displaying which
// has a fully decoded surface, then we should prefer the previous image.
switch (drawResult) {
case ImgDrawResult::NOT_READY:
case ImgDrawResult::TEMPORARY_ERROR:
// nothing to draw (yet)
return true;
case ImgDrawResult::NOT_SUPPORTED:
// things we haven't implemented for WR yet
return false;
default:
// image is ready to draw
break;
}
// Don't do any actual mutations to state if we're doing a dry run
// (used to decide if we're making this into an active layer)
if (!aDryRun) {
// 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.
if (provider) {
aManager->CommandBuilder().PushImageProvider(aItem, provider, drawResult,
aBuilder, aResources,
destRect, clipRect);
}
}
return true;
}
nsIFrame* SVGImageFrame::GetFrameForPoint(const gfxPoint& aPoint) {
if (!HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD) && !GetHitTestFlags()) {
return nullptr;
}
Rect rect;
SVGImageElement* element = static_cast<SVGImageElement*>(GetContent());
SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, SVGT::Height>(
element, &rect.x, &rect.y, &rect.width, &rect.height);
if (!rect.Contains(ToPoint(aPoint))) {
return nullptr;
}
// Special case for raster images -- we only want to accept points that fall
// in the underlying image's (scaled to fit) native bounds. That region
// doesn't necessarily map to our <image> element's [x,y,width,height] if the
// raster image's aspect ratio is being preserved. We have to look up the
// native image size & our viewBox transform in order to filter out points
// that fall outside that area. (This special case doesn't apply to vector
// images because they don't limit their drawing to explicit "native
// bounds" -- they have an infinite canvas on which to place content.)
if (StyleDisplay()->IsScrollableOverflow() && mImageContainer) {
if (mImageContainer->GetType() == imgIContainer::TYPE_RASTER) {
int32_t nativeWidth, nativeHeight;
if (NS_FAILED(mImageContainer->GetWidth(&nativeWidth)) ||
NS_FAILED(mImageContainer->GetHeight(&nativeHeight)) ||
nativeWidth == 0 || nativeHeight == 0) {
return nullptr;
}
mImageContainer->GetResolution().ApplyTo(nativeWidth, nativeHeight);
Matrix viewBoxTM = SVGContentUtils::GetViewBoxTransform(
rect.width, rect.height, 0, 0, nativeWidth, nativeHeight,
element->mPreserveAspectRatio);
if (!SVGUtils::HitTestRect(viewBoxTM, 0, 0, nativeWidth, nativeHeight,
aPoint.x - rect.x, aPoint.y - rect.y)) {
return nullptr;
}
}
}
return this;
}
//----------------------------------------------------------------------
// SVGGeometryFrame methods:
// Lie about our fill/stroke so that covered region and hit detection work
// properly
void SVGImageFrame::ReflowSVG() {
NS_ASSERTION(SVGUtils::OuterSVGIsCallingReflowSVG(this),
"This call is probably a wasteful mistake");
MOZ_ASSERT(!HasAnyStateBits(NS_FRAME_IS_NONDISPLAY),
"ReflowSVG mechanism not designed for this");
if (!SVGUtils::NeedsReflowSVG(this)) {
return;
}
float x, y, width, height;
SVGImageElement* element = static_cast<SVGImageElement*>(GetContent());
SVGGeometryProperty::ResolveAll<SVGT::X, SVGT::Y, SVGT::Width, SVGT::Height>(
element, &x, &y, &width, &height);
Rect extent(x, y, width, height);
if (!extent.IsEmpty()) {
mRect = nsLayoutUtils::RoundGfxRectToAppRect(extent, AppUnitsPerCSSPixel());
} else {
mRect.SetEmpty();
}
if (mState & NS_FRAME_FIRST_REFLOW) {
// Make sure we have our filter property (if any) before calling
// FinishAndStoreOverflow (subsequent filter changes are handled off
// nsChangeHint_UpdateEffects):
SVGObserverUtils::UpdateEffects(this);
if (!mReflowCallbackPosted) {
mReflowCallbackPosted = true;
PresShell()->PostReflowCallback(this);
}
}
nsRect overflow = nsRect(nsPoint(0, 0), mRect.Size());
OverflowAreas overflowAreas(overflow, overflow);
FinishAndStoreOverflow(overflowAreas, mRect.Size());
RemoveStateBits(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
NS_FRAME_HAS_DIRTY_CHILDREN);
// Invalidate, but only if this is not our first reflow (since if it is our
// first reflow then we haven't had our first paint yet).
if (!GetParent()->HasAnyStateBits(NS_FRAME_FIRST_REFLOW)) {
InvalidateFrame();
}
}
bool SVGImageFrame::ReflowFinished() {
mReflowCallbackPosted = false;
// XXX(seth): We don't need this. The purpose of updating visibility
// synchronously is to ensure that animated images start animating
// immediately. In the short term, however,
// nsImageLoadingContent::OnUnlockedDraw() is enough to ensure that
// animations start as soon as the image is painted for the first time, and in
// the long term we want to update visibility information from the display
// list whenever we paint, so we don't actually need to do this. However, to
// avoid behavior changes during the transition from the old image visibility
// code, we'll leave it in for now.
UpdateVisibilitySynchronously();
return false;
}
void SVGImageFrame::ReflowCallbackCanceled() { mReflowCallbackPosted = false; }
uint16_t SVGImageFrame::GetHitTestFlags() {
uint16_t flags = 0;
switch (Style()->PointerEvents()) {
case StylePointerEvents::None:
break;
case StylePointerEvents::Visiblepainted:
case StylePointerEvents::Auto:
if (StyleVisibility()->IsVisible()) {
/* XXX: should check pixel transparency */
flags |= SVG_HIT_TEST_FILL;
}
break;
case StylePointerEvents::Visiblefill:
case StylePointerEvents::Visiblestroke:
case StylePointerEvents::Visible:
if (StyleVisibility()->IsVisible()) {
flags |= SVG_HIT_TEST_FILL;
}
break;
case StylePointerEvents::Painted:
/* XXX: should check pixel transparency */
flags |= SVG_HIT_TEST_FILL;
break;
case StylePointerEvents::Fill:
case StylePointerEvents::Stroke:
case StylePointerEvents::All:
flags |= SVG_HIT_TEST_FILL;
break;
default:
NS_ERROR("not reached");
break;
}
return flags;
}
//----------------------------------------------------------------------
// SVGImageListener implementation
NS_IMPL_ISUPPORTS(SVGImageListener, imgINotificationObserver)
SVGImageListener::SVGImageListener(SVGImageFrame* aFrame) : mFrame(aFrame) {}
void SVGImageListener::Notify(imgIRequest* aRequest, int32_t aType,
const nsIntRect* aData) {
if (!mFrame) {
return;
}
if (aType == imgINotificationObserver::LOAD_COMPLETE) {
mFrame->InvalidateFrame();
nsLayoutUtils::PostRestyleEvent(mFrame->GetContent()->AsElement(),
RestyleHint{0},
nsChangeHint_InvalidateRenderingObservers);
SVGUtils::ScheduleReflowSVG(mFrame);
}
if (aType == imgINotificationObserver::FRAME_UPDATE) {
// No new dimensions, so we don't need to call
// SVGUtils::InvalidateAndScheduleBoundsUpdate.
nsLayoutUtils::PostRestyleEvent(mFrame->GetContent()->AsElement(),
RestyleHint{0},
nsChangeHint_InvalidateRenderingObservers);
mFrame->InvalidateFrame();
}
if (aType == imgINotificationObserver::SIZE_AVAILABLE) {
// Called once the resource's dimensions have been obtained.
nsCOMPtr<imgIContainer> image;
aRequest->GetImage(getter_AddRefs(image));
if (image) {
image = nsLayoutUtils::OrientImage(
image, mFrame->StyleVisibility()->mImageOrientation);
image->SetAnimationMode(mFrame->PresContext()->ImageAnimationMode());
mFrame->mImageContainer = std::move(image);
}
mFrame->InvalidateFrame();
nsLayoutUtils::PostRestyleEvent(mFrame->GetContent()->AsElement(),
RestyleHint{0},
nsChangeHint_InvalidateRenderingObservers);
SVGUtils::ScheduleReflowSVG(mFrame);
}
}
} // namespace mozilla