mirror of
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bf5ea4cb2d
Differential Revision: https://phabricator.services.mozilla.com/D43751 --HG-- extra : moz-landing-system : lando
794 lines
30 KiB
C++
794 lines
30 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Main header first:
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#include "SVGGeometryFrame.h"
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// Keep others in (case-insensitive) order:
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#include "gfx2DGlue.h"
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#include "gfxContext.h"
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#include "gfxPlatform.h"
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#include "gfxUtils.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/Helpers.h"
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#include "mozilla/PresShell.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/SVGContextPaint.h"
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#include "nsDisplayList.h"
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#include "nsGkAtoms.h"
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#include "nsLayoutUtils.h"
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#include "SVGObserverUtils.h"
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#include "nsSVGIntegrationUtils.h"
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#include "nsSVGMarkerFrame.h"
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#include "SVGGeometryElement.h"
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#include "nsSVGUtils.h"
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#include "mozilla/ArrayUtils.h"
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#include "SVGAnimatedTransformList.h"
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#include "SVGContentUtils.h"
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#include "SVGGraphicsElement.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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using namespace mozilla::gfx;
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using namespace mozilla::image;
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//----------------------------------------------------------------------
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// Implementation
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nsIFrame* NS_NewSVGGeometryFrame(PresShell* aPresShell, ComputedStyle* aStyle) {
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return new (aPresShell)
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SVGGeometryFrame(aStyle, aPresShell->GetPresContext());
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}
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NS_IMPL_FRAMEARENA_HELPERS(SVGGeometryFrame)
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//----------------------------------------------------------------------
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// nsQueryFrame methods
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NS_QUERYFRAME_HEAD(SVGGeometryFrame)
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NS_QUERYFRAME_ENTRY(nsSVGDisplayableFrame)
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NS_QUERYFRAME_ENTRY(SVGGeometryFrame)
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NS_QUERYFRAME_TAIL_INHERITING(nsFrame)
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//----------------------------------------------------------------------
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// Display list item:
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class nsDisplaySVGGeometry final : public nsPaintedDisplayItem {
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typedef mozilla::image::imgDrawingParams imgDrawingParams;
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public:
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nsDisplaySVGGeometry(nsDisplayListBuilder* aBuilder, SVGGeometryFrame* aFrame)
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: nsPaintedDisplayItem(aBuilder, aFrame) {
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MOZ_COUNT_CTOR(nsDisplaySVGGeometry);
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MOZ_ASSERT(aFrame, "Must have a frame!");
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}
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#ifdef NS_BUILD_REFCNT_LOGGING
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virtual ~nsDisplaySVGGeometry() { MOZ_COUNT_DTOR(nsDisplaySVGGeometry); }
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#endif
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NS_DISPLAY_DECL_NAME("nsDisplaySVGGeometry", TYPE_SVG_GEOMETRY)
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virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
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HitTestState* aState,
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nsTArray<nsIFrame*>* aOutFrames) override;
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virtual void Paint(nsDisplayListBuilder* aBuilder, gfxContext* aCtx) override;
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nsDisplayItemGeometry* AllocateGeometry(
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nsDisplayListBuilder* aBuilder) override {
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return new nsDisplayItemGenericImageGeometry(this, aBuilder);
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}
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void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
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const nsDisplayItemGeometry* aGeometry,
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nsRegion* aInvalidRegion) const override;
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};
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void nsDisplaySVGGeometry::HitTest(nsDisplayListBuilder* aBuilder,
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const nsRect& aRect, HitTestState* aState,
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nsTArray<nsIFrame*>* aOutFrames) {
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SVGGeometryFrame* frame = static_cast<SVGGeometryFrame*>(mFrame);
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nsPoint pointRelativeToReferenceFrame = aRect.Center();
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// ToReferenceFrame() includes frame->GetPosition(), our user space position.
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nsPoint userSpacePtInAppUnits = pointRelativeToReferenceFrame -
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(ToReferenceFrame() - frame->GetPosition());
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gfxPoint userSpacePt =
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gfxPoint(userSpacePtInAppUnits.x, userSpacePtInAppUnits.y) /
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AppUnitsPerCSSPixel();
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if (frame->GetFrameForPoint(userSpacePt)) {
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aOutFrames->AppendElement(frame);
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}
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}
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void nsDisplaySVGGeometry::Paint(nsDisplayListBuilder* aBuilder,
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gfxContext* aCtx) {
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uint32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
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// ToReferenceFrame includes our mRect offset, but painting takes
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// account of that too. To avoid double counting, we subtract that
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// here.
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nsPoint offset = ToReferenceFrame() - mFrame->GetPosition();
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gfxPoint devPixelOffset =
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nsLayoutUtils::PointToGfxPoint(offset, appUnitsPerDevPixel);
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gfxMatrix tm = nsSVGUtils::GetCSSPxToDevPxMatrix(mFrame) *
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gfxMatrix::Translation(devPixelOffset);
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imgDrawingParams imgParams(aBuilder->GetImageDecodeFlags());
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static_cast<SVGGeometryFrame*>(mFrame)->PaintSVG(*aCtx, tm, imgParams);
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nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, imgParams.result);
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}
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void nsDisplaySVGGeometry::ComputeInvalidationRegion(
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nsDisplayListBuilder* aBuilder, const nsDisplayItemGeometry* aGeometry,
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nsRegion* aInvalidRegion) const {
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auto geometry =
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static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);
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if (aBuilder->ShouldSyncDecodeImages() &&
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geometry->ShouldInvalidateToSyncDecodeImages()) {
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bool snap;
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aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
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}
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nsPaintedDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry,
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aInvalidRegion);
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}
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namespace mozilla {
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//----------------------------------------------------------------------
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// nsIFrame methods
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void SVGGeometryFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) {
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AddStateBits(aParent->GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD);
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nsFrame::Init(aContent, aParent, aPrevInFlow);
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}
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nsresult SVGGeometryFrame::AttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType) {
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// We don't invalidate for transform changes (the layers code does that).
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// Also note that SVGTransformableElement::GetAttributeChangeHint will
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// return nsChangeHint_UpdateOverflow for "transform" attribute changes
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// and cause DoApplyRenderingChangeToTree to make the SchedulePaint call.
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if (aNameSpaceID == kNameSpaceID_None &&
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(static_cast<SVGGeometryElement*>(GetContent())
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->AttributeDefinesGeometry(aAttribute))) {
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nsLayoutUtils::PostRestyleEvent(mContent->AsElement(), RestyleHint{0},
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nsChangeHint_InvalidateRenderingObservers);
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nsSVGUtils::ScheduleReflowSVG(this);
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}
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return NS_OK;
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}
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/* virtual */
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void SVGGeometryFrame::DidSetComputedStyle(ComputedStyle* aOldComputedStyle) {
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nsFrame::DidSetComputedStyle(aOldComputedStyle);
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if (aOldComputedStyle) {
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SVGGeometryElement* element =
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static_cast<SVGGeometryElement*>(GetContent());
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auto* oldStyleSVG = aOldComputedStyle->StyleSVG();
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if (!SVGContentUtils::ShapeTypeHasNoCorners(GetContent())) {
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if (StyleSVG()->mStrokeLinecap != oldStyleSVG->mStrokeLinecap &&
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element->IsSVGElement(nsGkAtoms::path)) {
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// If the stroke-linecap changes to or from "butt" then our element
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// needs to update its cached Moz2D Path, since SVGPathData::BuildPath
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// decides whether or not to insert little lines into the path for zero
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// length subpaths base on that property.
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element->ClearAnyCachedPath();
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} else if (GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD) {
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if (StyleSVG()->mClipRule != oldStyleSVG->mClipRule) {
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// Moz2D Path objects are fill-rule specific.
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// For clipPath we use clip-rule as the path's fill-rule.
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element->ClearAnyCachedPath();
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}
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} else {
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if (StyleSVG()->mFillRule != oldStyleSVG->mFillRule) {
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// Moz2D Path objects are fill-rule specific.
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element->ClearAnyCachedPath();
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}
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}
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}
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if (element->IsGeometryChangedViaCSS(*Style(), *aOldComputedStyle)) {
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element->ClearAnyCachedPath();
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}
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}
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}
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bool SVGGeometryFrame::IsSVGTransformed(
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gfx::Matrix* aOwnTransform, gfx::Matrix* aFromParentTransform) const {
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bool foundTransform = false;
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// Check if our parent has children-only transforms:
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nsIFrame* parent = GetParent();
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if (parent &&
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parent->IsFrameOfType(nsIFrame::eSVG | nsIFrame::eSVGContainer)) {
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foundTransform =
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static_cast<nsSVGContainerFrame*>(parent)->HasChildrenOnlyTransform(
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aFromParentTransform);
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}
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SVGElement* content = static_cast<SVGElement*>(GetContent());
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SVGAnimatedTransformList* transformList = content->GetAnimatedTransformList();
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if ((transformList && transformList->HasTransform()) ||
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content->GetAnimateMotionTransform()) {
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if (aOwnTransform) {
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*aOwnTransform = gfx::ToMatrix(
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content->PrependLocalTransformsTo(gfxMatrix(), eUserSpaceToParent));
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}
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foundTransform = true;
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}
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return foundTransform;
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}
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void SVGGeometryFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) {
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if (!static_cast<const SVGElement*>(GetContent())->HasValidDimensions() ||
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((!IsVisibleForPainting() || StyleEffects()->mOpacity == 0.0f) &&
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aBuilder->IsForPainting())) {
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return;
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}
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DisplayOutline(aBuilder, aLists);
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aLists.Content()->AppendNewToTop<nsDisplaySVGGeometry>(aBuilder, this);
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}
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//----------------------------------------------------------------------
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// nsSVGDisplayableFrame methods
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void SVGGeometryFrame::PaintSVG(gfxContext& aContext,
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const gfxMatrix& aTransform,
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imgDrawingParams& aImgParams,
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const nsIntRect* aDirtyRect) {
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if (!StyleVisibility()->IsVisible()) {
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return;
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}
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// Matrix to the geometry's user space:
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gfxMatrix newMatrix =
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aContext.CurrentMatrixDouble().PreMultiply(aTransform).NudgeToIntegers();
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if (newMatrix.IsSingular()) {
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return;
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}
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uint32_t paintOrder = StyleSVG()->mPaintOrder;
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if (!paintOrder) {
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Render(&aContext, eRenderFill | eRenderStroke, newMatrix, aImgParams);
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PaintMarkers(aContext, aTransform, aImgParams);
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} else {
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while (paintOrder) {
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auto component = StylePaintOrder(paintOrder & kPaintOrderMask);
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switch (component) {
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case StylePaintOrder::Fill:
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Render(&aContext, eRenderFill, newMatrix, aImgParams);
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break;
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case StylePaintOrder::Stroke:
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Render(&aContext, eRenderStroke, newMatrix, aImgParams);
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break;
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case StylePaintOrder::Markers:
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PaintMarkers(aContext, aTransform, aImgParams);
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break;
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default:
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MOZ_FALLTHROUGH_ASSERT("Unknown paint-order variant, how?");
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case StylePaintOrder::Normal:
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break;
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}
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paintOrder >>= kPaintOrderShift;
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}
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}
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}
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nsIFrame* SVGGeometryFrame::GetFrameForPoint(const gfxPoint& aPoint) {
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FillRule fillRule;
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uint16_t hitTestFlags;
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if (GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD) {
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hitTestFlags = SVG_HIT_TEST_FILL;
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fillRule = nsSVGUtils::ToFillRule(StyleSVG()->mClipRule);
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} else {
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hitTestFlags = GetHitTestFlags();
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if (!hitTestFlags) {
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return nullptr;
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}
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if (hitTestFlags & SVG_HIT_TEST_CHECK_MRECT) {
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gfxRect rect = nsLayoutUtils::RectToGfxRect(mRect, AppUnitsPerCSSPixel());
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if (!rect.Contains(aPoint)) {
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return nullptr;
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}
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}
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fillRule = nsSVGUtils::ToFillRule(StyleSVG()->mFillRule);
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}
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bool isHit = false;
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SVGGeometryElement* content = static_cast<SVGGeometryElement*>(GetContent());
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// Using ScreenReferenceDrawTarget() opens us to Moz2D backend specific hit-
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// testing bugs. Maybe we should use a BackendType::CAIRO DT for hit-testing
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// so that we get more consistent/backwards compatible results?
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RefPtr<DrawTarget> drawTarget =
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gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget();
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RefPtr<Path> path = content->GetOrBuildPath(drawTarget, fillRule);
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if (!path) {
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return nullptr; // no path, so we don't paint anything that can be hit
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}
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if (hitTestFlags & SVG_HIT_TEST_FILL) {
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isHit = path->ContainsPoint(ToPoint(aPoint), Matrix());
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}
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if (!isHit && (hitTestFlags & SVG_HIT_TEST_STROKE)) {
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Point point = ToPoint(aPoint);
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SVGContentUtils::AutoStrokeOptions stroke;
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SVGContentUtils::GetStrokeOptions(&stroke, content, Style(), nullptr);
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gfxMatrix userToOuterSVG;
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if (nsSVGUtils::GetNonScalingStrokeTransform(this, &userToOuterSVG)) {
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// We need to transform the path back into the appropriate ancestor
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// coordinate system in order for non-scaled stroke to be correct.
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// Naturally we also need to transform the point into the same
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// coordinate system in order to hit-test against the path.
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point = ToMatrix(userToOuterSVG).TransformPoint(point);
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RefPtr<PathBuilder> builder =
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path->TransformedCopyToBuilder(ToMatrix(userToOuterSVG), fillRule);
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path = builder->Finish();
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}
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isHit = path->StrokeContainsPoint(stroke, point, Matrix());
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}
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if (isHit && nsSVGUtils::HitTestClip(this, aPoint)) {
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return this;
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}
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return nullptr;
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}
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void SVGGeometryFrame::ReflowSVG() {
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NS_ASSERTION(nsSVGUtils::OuterSVGIsCallingReflowSVG(this),
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"This call is probably a wasteful mistake");
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MOZ_ASSERT(!(GetStateBits() & NS_FRAME_IS_NONDISPLAY),
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"ReflowSVG mechanism not designed for this");
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if (!nsSVGUtils::NeedsReflowSVG(this)) {
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return;
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}
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uint32_t flags = nsSVGUtils::eBBoxIncludeFill |
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nsSVGUtils::eBBoxIncludeStroke |
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nsSVGUtils::eBBoxIncludeMarkers;
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// Our "visual" overflow rect needs to be valid for building display lists
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// for hit testing, which means that for certain values of 'pointer-events'
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// it needs to include the geometry of the fill or stroke even when the fill/
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// stroke don't actually render (e.g. when stroke="none" or
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// stroke-opacity="0"). GetHitTestFlags() accounts for 'pointer-events'.
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uint16_t hitTestFlags = GetHitTestFlags();
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if ((hitTestFlags & SVG_HIT_TEST_FILL)) {
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flags |= nsSVGUtils::eBBoxIncludeFillGeometry;
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}
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if ((hitTestFlags & SVG_HIT_TEST_STROKE)) {
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flags |= nsSVGUtils::eBBoxIncludeStrokeGeometry;
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}
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gfxRect extent = GetBBoxContribution(Matrix(), flags).ToThebesRect();
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mRect = nsLayoutUtils::RoundGfxRectToAppRect(extent, AppUnitsPerCSSPixel());
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if (mState & NS_FRAME_FIRST_REFLOW) {
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// Make sure we have our filter property (if any) before calling
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// FinishAndStoreOverflow (subsequent filter changes are handled off
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// nsChangeHint_UpdateEffects):
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SVGObserverUtils::UpdateEffects(this);
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}
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nsRect overflow = nsRect(nsPoint(0, 0), mRect.Size());
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nsOverflowAreas overflowAreas(overflow, overflow);
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FinishAndStoreOverflow(overflowAreas, mRect.Size());
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RemoveStateBits(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
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NS_FRAME_HAS_DIRTY_CHILDREN);
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// Invalidate, but only if this is not our first reflow (since if it is our
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// first reflow then we haven't had our first paint yet).
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if (!(GetParent()->GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
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InvalidateFrame();
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}
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}
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void SVGGeometryFrame::NotifySVGChanged(uint32_t aFlags) {
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MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
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"Invalidation logic may need adjusting");
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// Changes to our ancestors may affect how we render when we are rendered as
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// part of our ancestor (specifically, if our coordinate context changes size
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// and we have percentage lengths defining our geometry, then we need to be
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// reflowed). However, ancestor changes cannot affect how we render when we
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// are rendered as part of any rendering observers that we may have.
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// Therefore no need to notify rendering observers here.
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// Don't try to be too smart trying to avoid the ScheduleReflowSVG calls
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// for the stroke properties examined below. Checking HasStroke() is not
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// enough, since what we care about is whether we include the stroke in our
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// overflow rects or not, and we sometimes deliberately include stroke
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// when it's not visible. See the complexities of GetBBoxContribution.
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if (aFlags & COORD_CONTEXT_CHANGED) {
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// Stroke currently contributes to our mRect, which is why we have to take
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// account of stroke-width here. Note that we do not need to take account
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// of stroke-dashoffset since, although that can have a percentage value
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// that is resolved against our coordinate context, it does not affect our
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// mRect.
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if (static_cast<SVGGeometryElement*>(GetContent())
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->GeometryDependsOnCoordCtx() ||
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StyleSVG()->mStrokeWidth.HasPercent()) {
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static_cast<SVGGeometryElement*>(GetContent())->ClearAnyCachedPath();
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nsSVGUtils::ScheduleReflowSVG(this);
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}
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}
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if ((aFlags & TRANSFORM_CHANGED) && StyleSVGReset()->HasNonScalingStroke()) {
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// Stroke currently contributes to our mRect, and our stroke depends on
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// the transform to our outer-<svg> if |vector-effect:non-scaling-stroke|.
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nsSVGUtils::ScheduleReflowSVG(this);
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}
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}
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SVGBBox SVGGeometryFrame::GetBBoxContribution(const Matrix& aToBBoxUserspace,
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uint32_t aFlags) {
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SVGBBox bbox;
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if (aToBBoxUserspace.IsSingular()) {
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// XXX ReportToConsole
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return bbox;
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}
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if ((aFlags & nsSVGUtils::eForGetClientRects) &&
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aToBBoxUserspace.PreservesAxisAlignedRectangles()) {
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Rect rect = NSRectToRect(mRect, AppUnitsPerCSSPixel());
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bbox = aToBBoxUserspace.TransformBounds(rect);
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return bbox;
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}
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SVGGeometryElement* element = static_cast<SVGGeometryElement*>(GetContent());
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bool getFill = (aFlags & nsSVGUtils::eBBoxIncludeFillGeometry) ||
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((aFlags & nsSVGUtils::eBBoxIncludeFill) &&
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!StyleSVG()->mFill.kind.IsNone());
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bool getStroke = (aFlags & nsSVGUtils::eBBoxIncludeStrokeGeometry) ||
|
|
((aFlags & nsSVGUtils::eBBoxIncludeStroke) &&
|
|
nsSVGUtils::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 &&
|
|
nsSVGUtils::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;
|
|
#ifdef XP_WIN
|
|
// Unfortunately D2D backed DrawTarget produces bounds with rounding errors
|
|
// when whole number results are expected, even in the case of trivial
|
|
// calculations. To avoid that and meet the expectations of web content we
|
|
// have to use a CAIRO DrawTarget. The most efficient way to do that is to
|
|
// wrap the cached cairo_surface_t from ScreenReferenceSurface():
|
|
RefPtr<gfxASurface> refSurf =
|
|
gfxPlatform::GetPlatform()->ScreenReferenceSurface();
|
|
tmpDT = gfxPlatform::CreateDrawTargetForSurface(refSurf, IntSize(1, 1));
|
|
#else
|
|
tmpDT = gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget();
|
|
#endif
|
|
|
|
FillRule fillRule = nsSVGUtils::ToFillRule(
|
|
(GetStateBits() & 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 (nsSVGUtils::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 nsSVGUtils::PathExtentsToMaxStrokeExtents:
|
|
gfxRect strokeBBoxExtents = nsSVGUtils::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 & nsSVGUtils::eBBoxIncludeMarkers) != 0 &&
|
|
element->IsMarkable()) {
|
|
nsSVGMarkerFrame* markerFrames[SVGMark::eTypeCount];
|
|
if (SVGObserverUtils::GetAndObserveMarkers(this, &markerFrames)) {
|
|
nsTArray<SVGMark> marks;
|
|
element->GetMarkPoints(&marks);
|
|
if (uint32_t num = marks.Length()) {
|
|
float strokeWidth = nsSVGUtils::GetStrokeWidth(this);
|
|
for (uint32_t i = 0; i < num; i++) {
|
|
const SVGMark& mark = marks[i];
|
|
nsSVGMarkerFrame* 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");
|
|
|
|
nsSVGContainerFrame* parent = static_cast<nsSVGContainerFrame*>(GetParent());
|
|
SVGGraphicsElement* 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 = nsSVGUtils::ToFillRule(
|
|
(GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD) ? StyleSVG()->mClipRule
|
|
: StyleSVG()->mFillRule);
|
|
|
|
SVGGeometryElement* element = static_cast<SVGGeometryElement*>(GetContent());
|
|
|
|
AntialiasMode aaMode =
|
|
(StyleSVG()->mShapeRendering == NS_STYLE_SHAPE_RENDERING_OPTIMIZESPEED ||
|
|
StyleSVG()->mShapeRendering == NS_STYLE_SHAPE_RENDERING_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 (GetStateBits() & 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(Color(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;
|
|
nsSVGUtils::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) &&
|
|
nsSVGUtils::HasStroke(this, contextPaint)) {
|
|
// Account for vector-effect:non-scaling-stroke:
|
|
gfxMatrix userToOuterSVG;
|
|
if (nsSVGUtils::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;
|
|
nsSVGUtils::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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void SVGGeometryFrame::PaintMarkers(gfxContext& aContext,
|
|
const gfxMatrix& aTransform,
|
|
imgDrawingParams& aImgParams) {
|
|
auto element = static_cast<SVGGeometryElement*>(GetContent());
|
|
|
|
if (element->IsMarkable()) {
|
|
nsSVGMarkerFrame* markerFrames[SVGMark::eTypeCount];
|
|
if (SVGObserverUtils::GetAndObserveMarkers(this, &markerFrames)) {
|
|
nsTArray<SVGMark> marks;
|
|
element->GetMarkPoints(&marks);
|
|
if (uint32_t num = marks.Length()) {
|
|
SVGContextPaint* contextPaint =
|
|
SVGContextPaint::GetContextPaint(GetContent());
|
|
float strokeWidth = nsSVGUtils::GetStrokeWidth(this, contextPaint);
|
|
for (uint32_t i = 0; i < num; i++) {
|
|
const SVGMark& mark = marks[i];
|
|
nsSVGMarkerFrame* frame = markerFrames[mark.type];
|
|
if (frame) {
|
|
frame->PaintMark(aContext, aTransform, this, mark, strokeWidth,
|
|
aImgParams);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
uint16_t SVGGeometryFrame::GetHitTestFlags() {
|
|
return nsSVGUtils::GetGeometryHitTestFlags(this);
|
|
}
|
|
} // namespace mozilla
|