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Diffstat (limited to 'layout/svg/SVGGeometryFrame.cpp')
| -rw-r--r-- | layout/svg/SVGGeometryFrame.cpp | 823 |
1 files changed, 823 insertions, 0 deletions
diff --git a/layout/svg/SVGGeometryFrame.cpp b/layout/svg/SVGGeometryFrame.cpp new file mode 100644 index 0000000000..7d0bd7cc4c --- /dev/null +++ b/layout/svg/SVGGeometryFrame.cpp @@ -0,0 +1,823 @@ +/* -*- 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/. */ + +// Main header first: +#include "SVGGeometryFrame.h" + +// Keep others in (case-insensitive) order: +#include "gfx2DGlue.h" +#include "gfxContext.h" +#include "gfxPlatform.h" +#include "gfxUtils.h" +#include "mozilla/dom/SVGGeometryElement.h" +#include "mozilla/dom/SVGGraphicsElement.h" +#include "mozilla/gfx/2D.h" +#include "mozilla/gfx/Helpers.h" +#include "mozilla/ArrayUtils.h" +#include "mozilla/PresShell.h" +#include "mozilla/RefPtr.h" +#include "mozilla/SVGContextPaint.h" +#include "mozilla/SVGContentUtils.h" +#include "mozilla/SVGObserverUtils.h" +#include "mozilla/SVGUtils.h" +#include "nsGkAtoms.h" +#include "nsLayoutUtils.h" +#include "SVGAnimatedTransformList.h" +#include "SVGMarkerFrame.h" + +using namespace mozilla::dom; +using namespace mozilla::gfx; +using namespace mozilla::image; + +//---------------------------------------------------------------------- +// Implementation + +nsIFrame* NS_NewSVGGeometryFrame(mozilla::PresShell* aPresShell, + mozilla::ComputedStyle* aStyle) { + return new (aPresShell) + mozilla::SVGGeometryFrame(aStyle, aPresShell->GetPresContext()); +} + +namespace mozilla { + +NS_IMPL_FRAMEARENA_HELPERS(SVGGeometryFrame) + +//---------------------------------------------------------------------- +// nsQueryFrame methods + +NS_QUERYFRAME_HEAD(SVGGeometryFrame) + NS_QUERYFRAME_ENTRY(ISVGDisplayableFrame) + NS_QUERYFRAME_ENTRY(SVGGeometryFrame) +NS_QUERYFRAME_TAIL_INHERITING(nsIFrame) + +//---------------------------------------------------------------------- +// nsIFrame methods + +void SVGGeometryFrame::Init(nsIContent* aContent, nsContainerFrame* aParent, + nsIFrame* aPrevInFlow) { + AddStateBits(aParent->GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD); + nsIFrame::Init(aContent, aParent, aPrevInFlow); +} + +nsresult SVGGeometryFrame::AttributeChanged(int32_t aNameSpaceID, + nsAtom* aAttribute, + int32_t aModType) { + // We don't invalidate for transform changes (the layers code does that). + // Also note that SVGTransformableElement::GetAttributeChangeHint will + // return nsChangeHint_UpdateOverflow for "transform" attribute changes + // and cause DoApplyRenderingChangeToTree to make the SchedulePaint call. + + if (aNameSpaceID == kNameSpaceID_None && + (static_cast<SVGGeometryElement*>(GetContent()) + ->AttributeDefinesGeometry(aAttribute))) { + nsLayoutUtils::PostRestyleEvent(mContent->AsElement(), RestyleHint{0}, + nsChangeHint_InvalidateRenderingObservers); + SVGUtils::ScheduleReflowSVG(this); + } + return NS_OK; +} + +/* virtual */ +void SVGGeometryFrame::DidSetComputedStyle(ComputedStyle* aOldComputedStyle) { + nsIFrame::DidSetComputedStyle(aOldComputedStyle); + auto* element = static_cast<SVGGeometryElement*>(GetContent()); + if (!aOldComputedStyle) { + element->ClearAnyCachedPath(); + return; + } + + const auto* oldStyleSVG = aOldComputedStyle->StyleSVG(); + if (!SVGContentUtils::ShapeTypeHasNoCorners(GetContent())) { + if (StyleSVG()->mStrokeLinecap != oldStyleSVG->mStrokeLinecap && + element->IsSVGElement(nsGkAtoms::path)) { + // If the stroke-linecap changes to or from "butt" then our element + // needs to update its cached Moz2D Path, since SVGPathData::BuildPath + // decides whether or not to insert little lines into the path for zero + // length subpaths base on that property. + element->ClearAnyCachedPath(); + } else if (HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD)) { + if (StyleSVG()->mClipRule != oldStyleSVG->mClipRule) { + // Moz2D Path objects are fill-rule specific. + // For clipPath we use clip-rule as the path's fill-rule. + element->ClearAnyCachedPath(); + } + } else { + if (StyleSVG()->mFillRule != oldStyleSVG->mFillRule) { + // Moz2D Path objects are fill-rule specific. + element->ClearAnyCachedPath(); + } + } + } + + if (element->IsGeometryChangedViaCSS(*Style(), *aOldComputedStyle)) { + element->ClearAnyCachedPath(); + } +} + +bool SVGGeometryFrame::IsSVGTransformed( + gfx::Matrix* aOwnTransform, gfx::Matrix* aFromParentTransform) const { + return SVGUtils::IsSVGTransformed(this, aOwnTransform, aFromParentTransform); +} + +void SVGGeometryFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder, + const nsDisplayListSet& aLists) { + if (!static_cast<const SVGElement*>(GetContent())->HasValidDimensions()) { + return; + } + + if (aBuilder->IsForPainting()) { + if (!IsVisibleForPainting()) { + return; + } + if (StyleEffects()->IsTransparent()) { + return; + } + const auto* styleSVG = StyleSVG(); + if (styleSVG->mFill.kind.IsNone() && styleSVG->mStroke.kind.IsNone() && + !styleSVG->HasMarker()) { + return; + } + + aBuilder->BuildCompositorHitTestInfoIfNeeded(this, + aLists.BorderBackground()); + } + + DisplayOutline(aBuilder, aLists); + aLists.Content()->AppendNewToTop<DisplaySVGGeometry>(aBuilder, this); +} + +//---------------------------------------------------------------------- +// ISVGDisplayableFrame methods + +void SVGGeometryFrame::PaintSVG(gfxContext& aContext, + const gfxMatrix& aTransform, + imgDrawingParams& aImgParams) { + if (!StyleVisibility()->IsVisible()) { + return; + } + + // Matrix to the geometry's user space: + gfxMatrix newMatrix = + aContext.CurrentMatrixDouble().PreMultiply(aTransform).NudgeToIntegers(); + if (newMatrix.IsSingular()) { + return; + } + + uint32_t paintOrder = StyleSVG()->mPaintOrder; + if (!paintOrder) { + Render(&aContext, eRenderFill | eRenderStroke, newMatrix, aImgParams); + PaintMarkers(aContext, aTransform, aImgParams); + } else { + while (paintOrder) { + auto component = StylePaintOrder(paintOrder & kPaintOrderMask); + switch (component) { + case StylePaintOrder::Fill: + Render(&aContext, eRenderFill, newMatrix, aImgParams); + break; + case StylePaintOrder::Stroke: + Render(&aContext, eRenderStroke, newMatrix, aImgParams); + break; + case StylePaintOrder::Markers: + PaintMarkers(aContext, aTransform, aImgParams); + break; + default: + MOZ_FALLTHROUGH_ASSERT("Unknown paint-order variant, how?"); + case StylePaintOrder::Normal: + break; + } + paintOrder >>= kPaintOrderShift; + } + } +} + +nsIFrame* SVGGeometryFrame::GetFrameForPoint(const gfxPoint& aPoint) { + FillRule fillRule; + uint16_t hitTestFlags; + if (HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD)) { + hitTestFlags = SVG_HIT_TEST_FILL; + fillRule = SVGUtils::ToFillRule(StyleSVG()->mClipRule); + } else { + hitTestFlags = SVGUtils::GetGeometryHitTestFlags(this); + if (!hitTestFlags) { + return nullptr; + } + fillRule = SVGUtils::ToFillRule(StyleSVG()->mFillRule); + } + + bool isHit = false; + + SVGGeometryElement* content = static_cast<SVGGeometryElement*>(GetContent()); + + // Using ScreenReferenceDrawTarget() opens us to Moz2D backend specific hit- + // testing bugs. Maybe we should use a BackendType::CAIRO DT for hit-testing + // so that we get more consistent/backwards compatible results? + RefPtr<DrawTarget> drawTarget = + gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget(); + RefPtr<Path> path = content->GetOrBuildPath(drawTarget, fillRule); + if (!path) { + return nullptr; // no path, so we don't paint anything that can be hit + } + + if (hitTestFlags & SVG_HIT_TEST_FILL) { + isHit = path->ContainsPoint(ToPoint(aPoint), {}); + } + if (!isHit && (hitTestFlags & SVG_HIT_TEST_STROKE)) { + Point point = ToPoint(aPoint); + SVGContentUtils::AutoStrokeOptions stroke; + SVGContentUtils::GetStrokeOptions(&stroke, content, Style(), nullptr); + gfxMatrix userToOuterSVG; + if (SVGUtils::GetNonScalingStrokeTransform(this, &userToOuterSVG)) { + // We need to transform the path back into the appropriate ancestor + // coordinate system in order for non-scaled stroke to be correct. + // Naturally we also need to transform the point into the same + // coordinate system in order to hit-test against the path. + point = ToMatrix(userToOuterSVG).TransformPoint(point); + RefPtr<PathBuilder> builder = + path->TransformedCopyToBuilder(ToMatrix(userToOuterSVG), fillRule); + path = builder->Finish(); + } + isHit = path->StrokeContainsPoint(stroke, point, {}); + } + + if (isHit && SVGUtils::HitTestClip(this, aPoint)) { + return this; + } + + return nullptr; +} + +void SVGGeometryFrame::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; + } + + uint32_t flags = SVGUtils::eBBoxIncludeFill | SVGUtils::eBBoxIncludeStroke | + SVGUtils::eBBoxIncludeMarkers; + // Our "visual" overflow rect needs to be valid for building display lists + // for hit testing, which means that for certain values of 'pointer-events' + // it needs to include the geometry of the fill or stroke even when the fill/ + // stroke don't actually render (e.g. when stroke="none" or + // stroke-opacity="0"). GetGeometryHitTestFlags() accounts for + // 'pointer-events'. + uint16_t hitTestFlags = SVGUtils::GetGeometryHitTestFlags(this); + if (hitTestFlags & SVG_HIT_TEST_FILL) { + flags |= SVGUtils::eBBoxIncludeFillGeometry; + } + if (hitTestFlags & SVG_HIT_TEST_STROKE) { + flags |= SVGUtils::eBBoxIncludeStrokeGeometry; + } + + gfxRect extent = GetBBoxContribution({}, flags).ToThebesRect(); + mRect = nsLayoutUtils::RoundGfxRectToAppRect(extent, AppUnitsPerCSSPixel()); + + if (HasAnyStateBits(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); + } + + 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(); + } +} + +void SVGGeometryFrame::NotifySVGChanged(uint32_t aFlags) { + MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED), + "Invalidation logic may need adjusting"); + + // Changes to our ancestors may affect how we render when we are rendered as + // part of our ancestor (specifically, if our coordinate context changes size + // and we have percentage lengths defining our geometry, then we need to be + // reflowed). However, ancestor changes cannot affect how we render when we + // are rendered as part of any rendering observers that we may have. + // Therefore no need to notify rendering observers here. + + // Don't try to be too smart trying to avoid the ScheduleReflowSVG calls + // for the stroke properties examined below. Checking HasStroke() is not + // enough, since what we care about is whether we include the stroke in our + // overflow rects or not, and we sometimes deliberately include stroke + // when it's not visible. See the complexities of GetBBoxContribution. + + if (aFlags & COORD_CONTEXT_CHANGED) { + auto* geom = static_cast<SVGGeometryElement*>(GetContent()); + // Stroke currently contributes to our mRect, which is why we have to take + // account of stroke-width here. Note that we do not need to take account + // of stroke-dashoffset since, although that can have a percentage value + // that is resolved against our coordinate context, it does not affect our + // mRect. + const auto& strokeWidth = StyleSVG()->mStrokeWidth; + if (geom->GeometryDependsOnCoordCtx() || + (strokeWidth.IsLengthPercentage() && + strokeWidth.AsLengthPercentage().HasPercent())) { + geom->ClearAnyCachedPath(); + SVGUtils::ScheduleReflowSVG(this); + } + } + + if ((aFlags & TRANSFORM_CHANGED) && StyleSVGReset()->HasNonScalingStroke()) { + // Stroke currently contributes to our mRect, and our stroke depends on + // the transform to our outer-<svg> if |vector-effect:non-scaling-stroke|. + SVGUtils::ScheduleReflowSVG(this); + } +} + +SVGBBox SVGGeometryFrame::GetBBoxContribution(const Matrix& aToBBoxUserspace, + uint32_t aFlags) { + SVGBBox bbox; + + if (aToBBoxUserspace.IsSingular()) { + // XXX ReportToConsole + return bbox; + } + + if ((aFlags & SVGUtils::eForGetClientRects) && + aToBBoxUserspace.PreservesAxisAlignedRectangles()) { + Rect rect = NSRectToRect(mRect, AppUnitsPerCSSPixel()); + bbox = aToBBoxUserspace.TransformBounds(rect); + return bbox; + } + + SVGGeometryElement* element = static_cast<SVGGeometryElement*>(GetContent()); + + bool getFill = (aFlags & SVGUtils::eBBoxIncludeFillGeometry) || + ((aFlags & SVGUtils::eBBoxIncludeFill) && + !StyleSVG()->mFill.kind.IsNone()); + + bool getStroke = + (aFlags & SVGUtils::eBBoxIncludeStrokeGeometry) || + ((aFlags & SVGUtils::eBBoxIncludeStroke) && SVGUtils::HasStroke(this)); + + SVGContentUtils::AutoStrokeOptions strokeOptions; + if (getStroke) { + SVGContentUtils::GetStrokeOptions(&strokeOptions, element, Style(), nullptr, + SVGContentUtils::eIgnoreStrokeDashing); + } else { + // Override the default line width of 1.f so that when we call + // GetGeometryBounds below the result doesn't include stroke bounds. + strokeOptions.mLineWidth = 0.f; + } + + Rect simpleBounds; + bool gotSimpleBounds = false; + gfxMatrix userToOuterSVG; + if (getStroke && + SVGUtils::GetNonScalingStrokeTransform(this, &userToOuterSVG)) { + Matrix moz2dUserToOuterSVG = ToMatrix(userToOuterSVG); + if (moz2dUserToOuterSVG.IsSingular()) { + return bbox; + } + gotSimpleBounds = element->GetGeometryBounds( + &simpleBounds, strokeOptions, aToBBoxUserspace, &moz2dUserToOuterSVG); + } else { + gotSimpleBounds = element->GetGeometryBounds(&simpleBounds, strokeOptions, + aToBBoxUserspace); + } + + if (gotSimpleBounds) { + bbox = simpleBounds; + } else { + // Get the bounds using a Moz2D Path object (more expensive): + RefPtr<DrawTarget> tmpDT; + tmpDT = gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget(); + + FillRule fillRule = SVGUtils::ToFillRule( + HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD) ? StyleSVG()->mClipRule + : StyleSVG()->mFillRule); + RefPtr<Path> pathInUserSpace = element->GetOrBuildPath(tmpDT, fillRule); + if (!pathInUserSpace) { + return bbox; + } + RefPtr<Path> pathInBBoxSpace; + if (aToBBoxUserspace.IsIdentity()) { + pathInBBoxSpace = pathInUserSpace; + } else { + RefPtr<PathBuilder> builder = + pathInUserSpace->TransformedCopyToBuilder(aToBBoxUserspace, fillRule); + pathInBBoxSpace = builder->Finish(); + if (!pathInBBoxSpace) { + return bbox; + } + } + + // Be careful when replacing the following logic to get the fill and stroke + // extents independently (instead of computing the stroke extents from the + // path extents). You may think that you can just use the stroke extents if + // there is both a fill and a stroke. In reality it's necessary to + // calculate both the fill and stroke extents, and take the union of the + // two. There are two reasons for this: + // + // # Due to stroke dashing, in certain cases the fill extents could + // actually extend outside the stroke extents. + // # If the stroke is very thin, cairo won't paint any stroke, and so the + // stroke bounds that it will return will be empty. + + Rect pathBBoxExtents = pathInBBoxSpace->GetBounds(); + if (!pathBBoxExtents.IsFinite()) { + // This can happen in the case that we only have a move-to command in the + // path commands, in which case we know nothing gets rendered. + return bbox; + } + + // Account for fill: + if (getFill) { + bbox = pathBBoxExtents; + } + + // Account for stroke: + if (getStroke) { +#if 0 + // This disabled code is how we would calculate the stroke bounds using + // Moz2D Path::GetStrokedBounds(). Unfortunately at the time of writing + // it there are two problems that prevent us from using it. + // + // First, it seems that some of the Moz2D backends are really dumb. Not + // only do some GetStrokeOptions() implementations sometimes + // significantly overestimate the stroke bounds, but if an argument is + // passed for the aTransform parameter then they just return bounds-of- + // transformed-bounds. These two things combined can lead the bounds to + // be unacceptably oversized, leading to massive over-invalidation. + // + // Second, the way we account for non-scaling-stroke by transforming the + // path using the transform to the outer-<svg> element is not compatible + // with the way that SVGGeometryFrame::Reflow() inserts a scale + // into aToBBoxUserspace and then scales the bounds that we return. + SVGContentUtils::AutoStrokeOptions strokeOptions; + SVGContentUtils::GetStrokeOptions(&strokeOptions, element, + Style(), nullptr, + SVGContentUtils::eIgnoreStrokeDashing); + Rect strokeBBoxExtents; + gfxMatrix userToOuterSVG; + if (SVGUtils::GetNonScalingStrokeTransform(this, &userToOuterSVG)) { + Matrix outerSVGToUser = ToMatrix(userToOuterSVG); + outerSVGToUser.Invert(); + Matrix outerSVGToBBox = aToBBoxUserspace * outerSVGToUser; + RefPtr<PathBuilder> builder = + pathInUserSpace->TransformedCopyToBuilder(ToMatrix(userToOuterSVG)); + RefPtr<Path> pathInOuterSVGSpace = builder->Finish(); + strokeBBoxExtents = + pathInOuterSVGSpace->GetStrokedBounds(strokeOptions, outerSVGToBBox); + } else { + strokeBBoxExtents = + pathInUserSpace->GetStrokedBounds(strokeOptions, aToBBoxUserspace); + } + MOZ_ASSERT(strokeBBoxExtents.IsFinite(), "bbox is about to go bad"); + bbox.UnionEdges(strokeBBoxExtents); +#else + // For now we just use SVGUtils::PathExtentsToMaxStrokeExtents: + gfxRect strokeBBoxExtents = SVGUtils::PathExtentsToMaxStrokeExtents( + ThebesRect(pathBBoxExtents), this, ThebesMatrix(aToBBoxUserspace)); + MOZ_ASSERT(ToRect(strokeBBoxExtents).IsFinite(), + "bbox is about to go bad"); + bbox.UnionEdges(strokeBBoxExtents); +#endif + } + } + + // Account for markers: + if ((aFlags & SVGUtils::eBBoxIncludeMarkers) && element->IsMarkable()) { + SVGMarkerFrame* markerFrames[SVGMark::eTypeCount]; + if (SVGObserverUtils::GetAndObserveMarkers(this, &markerFrames)) { + nsTArray<SVGMark> marks; + element->GetMarkPoints(&marks); + if (uint32_t num = marks.Length()) { + float strokeWidth = SVGUtils::GetStrokeWidth(this); + for (uint32_t i = 0; i < num; i++) { + const SVGMark& mark = marks[i]; + SVGMarkerFrame* frame = markerFrames[mark.type]; + if (frame) { + SVGBBox mbbox = frame->GetMarkBBoxContribution( + aToBBoxUserspace, aFlags, this, mark, strokeWidth); + MOZ_ASSERT(mbbox.IsFinite(), "bbox is about to go bad"); + bbox.UnionEdges(mbbox); + } + } + } + } + } + + return bbox; +} + +//---------------------------------------------------------------------- +// SVGGeometryFrame methods: + +gfxMatrix SVGGeometryFrame::GetCanvasTM() { + NS_ASSERTION(GetParent(), "null parent"); + + auto* parent = static_cast<SVGContainerFrame*>(GetParent()); + auto* content = static_cast<SVGGraphicsElement*>(GetContent()); + + return content->PrependLocalTransformsTo(parent->GetCanvasTM()); +} + +void SVGGeometryFrame::Render(gfxContext* aContext, uint32_t aRenderComponents, + const gfxMatrix& aTransform, + imgDrawingParams& aImgParams) { + MOZ_ASSERT(!aTransform.IsSingular()); + + DrawTarget* drawTarget = aContext->GetDrawTarget(); + + MOZ_ASSERT(drawTarget); + if (!drawTarget->IsValid()) { + return; + } + + FillRule fillRule = SVGUtils::ToFillRule( + HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD) ? StyleSVG()->mClipRule + : StyleSVG()->mFillRule); + + SVGGeometryElement* element = static_cast<SVGGeometryElement*>(GetContent()); + + AntialiasMode aaMode = + (StyleSVG()->mShapeRendering == StyleShapeRendering::Optimizespeed || + StyleSVG()->mShapeRendering == StyleShapeRendering::Crispedges) + ? AntialiasMode::NONE + : AntialiasMode::SUBPIXEL; + + // We wait as late as possible before setting the transform so that we don't + // set it unnecessarily if we return early (it's an expensive operation for + // some backends). + gfxContextMatrixAutoSaveRestore autoRestoreTransform(aContext); + aContext->SetMatrixDouble(aTransform); + + if (HasAnyStateBits(NS_STATE_SVG_CLIPPATH_CHILD)) { + // We don't complicate this code with GetAsSimplePath since the cost of + // masking will dwarf Path creation overhead anyway. + RefPtr<Path> path = element->GetOrBuildPath(drawTarget, fillRule); + if (path) { + ColorPattern white(ToDeviceColor(sRGBColor(1.0f, 1.0f, 1.0f, 1.0f))); + drawTarget->Fill(path, white, + DrawOptions(1.0f, CompositionOp::OP_OVER, aaMode)); + } + return; + } + + SVGGeometryElement::SimplePath simplePath; + RefPtr<Path> path; + + element->GetAsSimplePath(&simplePath); + if (!simplePath.IsPath()) { + path = element->GetOrBuildPath(drawTarget, fillRule); + if (!path) { + return; + } + } + + SVGContextPaint* contextPaint = + SVGContextPaint::GetContextPaint(GetContent()); + + if (aRenderComponents & eRenderFill) { + GeneralPattern fillPattern; + SVGUtils::MakeFillPatternFor(this, aContext, &fillPattern, aImgParams, + contextPaint); + + if (fillPattern.GetPattern()) { + DrawOptions drawOptions(1.0f, CompositionOp::OP_OVER, aaMode); + if (simplePath.IsRect()) { + drawTarget->FillRect(simplePath.AsRect(), fillPattern, drawOptions); + } else if (path) { + drawTarget->Fill(path, fillPattern, drawOptions); + } + } + } + + if ((aRenderComponents & eRenderStroke) && + SVGUtils::HasStroke(this, contextPaint)) { + // Account for vector-effect:non-scaling-stroke: + gfxMatrix userToOuterSVG; + if (SVGUtils::GetNonScalingStrokeTransform(this, &userToOuterSVG)) { + // A simple Rect can't be transformed with rotate/skew, so let's switch + // to using a real path: + if (!path) { + path = element->GetOrBuildPath(drawTarget, fillRule); + if (!path) { + return; + } + simplePath.Reset(); + } + // We need to transform the path back into the appropriate ancestor + // coordinate system, and paint it it that coordinate system, in order + // for non-scaled stroke to paint correctly. + gfxMatrix outerSVGToUser = userToOuterSVG; + outerSVGToUser.Invert(); + aContext->Multiply(outerSVGToUser); + RefPtr<PathBuilder> builder = + path->TransformedCopyToBuilder(ToMatrix(userToOuterSVG), fillRule); + path = builder->Finish(); + } + GeneralPattern strokePattern; + SVGUtils::MakeStrokePatternFor(this, aContext, &strokePattern, aImgParams, + contextPaint); + + if (strokePattern.GetPattern()) { + SVGContentUtils::AutoStrokeOptions strokeOptions; + SVGContentUtils::GetStrokeOptions(&strokeOptions, + static_cast<SVGElement*>(GetContent()), + Style(), contextPaint); + // GetStrokeOptions may set the line width to zero as an optimization + if (strokeOptions.mLineWidth <= 0) { + return; + } + DrawOptions drawOptions(1.0f, CompositionOp::OP_OVER, aaMode); + if (simplePath.IsRect()) { + drawTarget->StrokeRect(simplePath.AsRect(), strokePattern, + strokeOptions, drawOptions); + } else if (simplePath.IsLine()) { + drawTarget->StrokeLine(simplePath.Point1(), simplePath.Point2(), + strokePattern, strokeOptions, drawOptions); + } else { + drawTarget->Stroke(path, strokePattern, strokeOptions, drawOptions); + } + } + } +} + +bool SVGGeometryFrame::IsInvisible() const { + if (!StyleVisibility()->IsVisible()) { + return true; + } + + // Anything below will round to zero later down the pipeline. + constexpr float opacity_threshold = 1.0 / 128.0; + + if (StyleEffects()->mOpacity <= opacity_threshold) { + return true; + } + + const nsStyleSVG* style = StyleSVG(); + SVGContextPaint* contextPaint = + SVGContextPaint::GetContextPaint(GetContent()); + + if (!style->mFill.kind.IsNone()) { + float opacity = SVGUtils::GetOpacity(style->mFillOpacity, contextPaint); + if (opacity > opacity_threshold) { + return false; + } + } + + if (!style->mStroke.kind.IsNone()) { + float opacity = SVGUtils::GetOpacity(style->mStrokeOpacity, contextPaint); + if (opacity > opacity_threshold) { + return false; + } + } + + if (style->HasMarker()) { + return false; + } + + return true; +} + +bool SVGGeometryFrame::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; + } + + SVGGeometryElement* element = static_cast<SVGGeometryElement*>(GetContent()); + + SVGGeometryElement::SimplePath simplePath; + element->GetAsSimplePath(&simplePath); + + if (!simplePath.IsRect()) { + return false; + } + + const nsStyleSVG* style = StyleSVG(); + MOZ_ASSERT(style); + + if (!style->mFill.kind.IsColor()) { + return false; + } + + switch (style->mFill.kind.tag) { + case StyleSVGPaintKind::Tag::Color: + break; + default: + return false; + } + + if (!style->mStroke.kind.IsNone()) { + return false; + } + + if (StyleEffects()->HasMixBlendMode()) { + // FIXME: not implemented + return false; + } + + if (style->HasMarker() && element->IsMarkable()) { + // Markers aren't suppported yet. + return false; + } + + if (!aDryRun) { + auto appUnitsPerDevPx = PresContext()->AppUnitsPerDevPixel(); + float scale = (float)AppUnitsPerCSSPixel() / (float)appUnitsPerDevPx; + + auto rect = simplePath.AsRect(); + rect.Scale(scale); + + auto offset = LayoutDevicePoint::FromAppUnits( + aItem->ToReferenceFrame() - GetPosition(), appUnitsPerDevPx); + rect.MoveBy(offset.x, offset.y); + + auto wrRect = wr::ToLayoutRect(rect); + + SVGContextPaint* contextPaint = + SVGContextPaint::GetContextPaint(GetContent()); + // At the moment this code path doesn't support strokes so it fine to + // combine the rectangle's opacity (which has to be applied on the result) + // of (filling + stroking) with the fill opacity. + float elemOpacity = StyleEffects()->mOpacity; + float fillOpacity = SVGUtils::GetOpacity(style->mFillOpacity, contextPaint); + float opacity = elemOpacity * fillOpacity; + + auto c = nsLayoutUtils::GetColor(this, &nsStyleSVG::mFill); + wr::ColorF color{ + ((float)NS_GET_R(c)) / 255.0f, ((float)NS_GET_G(c)) / 255.0f, + ((float)NS_GET_B(c)) / 255.0f, ((float)NS_GET_A(c)) / 255.0f * opacity}; + + aBuilder.PushRect(wrRect, wrRect, !aItem->BackfaceIsHidden(), true, false, + color); + } + + return true; +} + +void SVGGeometryFrame::PaintMarkers(gfxContext& aContext, + const gfxMatrix& aTransform, + imgDrawingParams& aImgParams) { + auto* element = static_cast<SVGGeometryElement*>(GetContent()); + if (!element->IsMarkable()) { + return; + } + SVGMarkerFrame* markerFrames[SVGMark::eTypeCount]; + if (!SVGObserverUtils::GetAndObserveMarkers(this, &markerFrames)) { + return; + } + nsTArray<SVGMark> marks; + element->GetMarkPoints(&marks); + if (marks.IsEmpty()) { + return; + } + float strokeWidth = GetStrokeWidthForMarkers(); + for (const SVGMark& mark : marks) { + if (auto* frame = markerFrames[mark.type]) { + frame->PaintMark(aContext, aTransform, this, mark, strokeWidth, + aImgParams); + } + } +} + +float SVGGeometryFrame::GetStrokeWidthForMarkers() { + float strokeWidth = SVGUtils::GetStrokeWidth( + this, SVGContextPaint::GetContextPaint(GetContent())); + gfxMatrix userToOuterSVG; + if (SVGUtils::GetNonScalingStrokeTransform(this, &userToOuterSVG)) { + // We're not interested in any translation here so we can treat this as + // Singular Value Decomposition (SVD) of a 2 x 2 matrix. That would give us + // sx and sy values as the X and Y scales. The value we want is the XY + // scale i.e. the normalised hypotenuse, which is sqrt(sx^2 + sy^2) / + // sqrt(2). If we use the formulae from + // https://scicomp.stackexchange.com/a/14103, we discover that the + // normalised hypotenuse is simply the square root of the sum of the squares + // of all the 2D matrix elements divided by sqrt(2). + // + // Note that this may need adjusting to support 3D transforms properly. + + strokeWidth /= float(sqrt(userToOuterSVG._11 * userToOuterSVG._11 + + userToOuterSVG._12 * userToOuterSVG._12 + + userToOuterSVG._21 * userToOuterSVG._21 + + userToOuterSVG._22 * userToOuterSVG._22) / + M_SQRT2); + } + return strokeWidth; +} + +} // namespace mozilla |