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Diffstat (limited to '')
| -rw-r--r-- | layout/svg/SVGImageFrame.cpp | 880 |
1 files changed, 880 insertions, 0 deletions
diff --git a/layout/svg/SVGImageFrame.cpp b/layout/svg/SVGImageFrame.cpp new file mode 100644 index 0000000000..67975ac122 --- /dev/null +++ b/layout/svg/SVGImageFrame.cpp @@ -0,0 +1,880 @@ +/* -*- 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; + } + + nsCOMPtr<imgIRequest> currentRequest; + nsCOMPtr<nsIImageLoadingContent> imageLoader = + do_QueryInterface(GetContent()); + if (imageLoader) { + imageLoader->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, + getter_AddRefs(currentRequest)); + } + + StyleImageOrientation newOrientation = + StyleVisibility()->UsedImageOrientation(currentRequest); + StyleImageOrientation oldOrientation = + aOldStyle->StyleVisibility()->UsedImageOrientation(currentRequest); + + if (oldOrientation != 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) { + StyleImageOrientation orientation = + mFrame->StyleVisibility()->UsedImageOrientation(aRequest); + image = nsLayoutUtils::OrientImage(image, orientation); + 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 |