928 lines
34 KiB
C++
928 lines
34 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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 "nsSVGPathGeometryFrame.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/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 "nsRenderingContext.h"
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#include "nsSVGEffects.h"
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#include "nsSVGIntegrationUtils.h"
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#include "nsSVGMarkerFrame.h"
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#include "nsSVGPathGeometryElement.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::gfx;
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using namespace mozilla::image;
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//----------------------------------------------------------------------
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// Implementation
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nsIFrame*
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NS_NewSVGPathGeometryFrame(nsIPresShell* aPresShell,
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nsStyleContext* aContext)
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{
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return new (aPresShell) nsSVGPathGeometryFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsSVGPathGeometryFrame)
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//----------------------------------------------------------------------
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// nsQueryFrame methods
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NS_QUERYFRAME_HEAD(nsSVGPathGeometryFrame)
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NS_QUERYFRAME_ENTRY(nsISVGChildFrame)
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NS_QUERYFRAME_ENTRY(nsSVGPathGeometryFrame)
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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 nsDisplaySVGPathGeometry : public nsDisplayItem {
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public:
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nsDisplaySVGPathGeometry(nsDisplayListBuilder* aBuilder,
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nsSVGPathGeometryFrame* aFrame)
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: nsDisplayItem(aBuilder, aFrame)
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{
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MOZ_COUNT_CTOR(nsDisplaySVGPathGeometry);
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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 ~nsDisplaySVGPathGeometry() {
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MOZ_COUNT_DTOR(nsDisplaySVGPathGeometry);
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}
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#endif
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NS_DISPLAY_DECL_NAME("nsDisplaySVGPathGeometry", TYPE_SVG_PATH_GEOMETRY)
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virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
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HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) override;
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virtual void Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx) override;
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nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder) override
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{
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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) override;
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};
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void
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nsDisplaySVGPathGeometry::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
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HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
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{
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nsSVGPathGeometryFrame *frame = static_cast<nsSVGPathGeometryFrame*>(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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frame->PresContext()->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
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nsDisplaySVGPathGeometry::Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx)
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{
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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 = nsSVGIntegrationUtils::GetCSSPxToDevPxMatrix(mFrame) *
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gfxMatrix::Translation(devPixelOffset);
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DrawResult result =
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static_cast<nsSVGPathGeometryFrame*>(mFrame)->PaintSVG(*aCtx->ThebesContext(), tm);
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nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, result);
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}
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void
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nsDisplaySVGPathGeometry::ComputeInvalidationRegion(
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nsDisplayListBuilder* aBuilder,
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const nsDisplayItemGeometry* aGeometry,
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nsRegion* aInvalidRegion)
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{
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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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nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
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}
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//----------------------------------------------------------------------
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// nsIFrame methods
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void
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nsSVGPathGeometryFrame::Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow)
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{
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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
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nsSVGPathGeometryFrame::AttributeChanged(int32_t aNameSpaceID,
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nsIAtom* aAttribute,
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int32_t aModType)
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{
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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<nsSVGPathGeometryElement*>
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(mContent)->AttributeDefinesGeometry(aAttribute))) {
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nsLayoutUtils::PostRestyleEvent(
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mContent->AsElement(), nsRestyleHint(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 */ void
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nsSVGPathGeometryFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext)
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{
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nsFrame::DidSetStyleContext(aOldStyleContext);
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if (aOldStyleContext) {
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auto oldStyleEffects = aOldStyleContext->PeekStyleEffects();
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if (oldStyleEffects &&
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StyleEffects()->mOpacity != oldStyleEffects->mOpacity &&
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nsSVGUtils::CanOptimizeOpacity(this)) {
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// nsIFrame::BuildDisplayListForStackingContext() is not going to create an
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// nsDisplayOpacity display list item, so DLBI won't invalidate for us.
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InvalidateFrame();
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}
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nsSVGPathGeometryElement* element =
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static_cast<nsSVGPathGeometryElement*>(mContent);
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auto oldStyleSVG = aOldStyleContext->PeekStyleSVG();
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if (oldStyleSVG && !SVGContentUtils::ShapeTypeHasNoCorners(mContent)) {
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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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}
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}
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nsIAtom *
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nsSVGPathGeometryFrame::GetType() const
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{
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return nsGkAtoms::svgPathGeometryFrame;
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}
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bool
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nsSVGPathGeometryFrame::IsSVGTransformed(gfx::Matrix *aOwnTransform,
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gfx::Matrix *aFromParentTransform) const
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{
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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 = static_cast<nsSVGContainerFrame*>(parent)->
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HasChildrenOnlyTransform(aFromParentTransform);
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}
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nsSVGElement *content = static_cast<nsSVGElement*>(mContent);
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nsSVGAnimatedTransformList* transformList =
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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(
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gfxMatrix(),
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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
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nsSVGPathGeometryFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists)
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{
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if (!static_cast<const nsSVGElement*>(mContent)->HasValidDimensions() ||
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(!IsVisibleForPainting(aBuilder) && 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(
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new (aBuilder) nsDisplaySVGPathGeometry(aBuilder, this));
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}
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//----------------------------------------------------------------------
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// nsISVGChildFrame methods
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DrawResult
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nsSVGPathGeometryFrame::PaintSVG(gfxContext& aContext,
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const gfxMatrix& aTransform,
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const nsIntRect* aDirtyRect)
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{
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if (!StyleVisibility()->IsVisible())
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return DrawResult::SUCCESS;
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gfxMatrix childToUserSpace = aTransform;
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if (GetContent()->IsSVGElement()) {
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childToUserSpace = static_cast<const nsSVGElement*>(GetContent())->
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PrependLocalTransformsTo(childToUserSpace,
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eChildToUserSpace);
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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.CurrentMatrix().PreMultiply(childToUserSpace).NudgeToIntegers();
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if (newMatrix.IsSingular()) {
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return DrawResult::BAD_ARGS;
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}
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uint32_t paintOrder = StyleSVG()->mPaintOrder;
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if (paintOrder == NS_STYLE_PAINT_ORDER_NORMAL) {
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Render(&aContext, eRenderFill | eRenderStroke, newMatrix);
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PaintMarkers(aContext, aTransform);
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} else {
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while (paintOrder) {
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uint32_t component =
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paintOrder & ((1 << NS_STYLE_PAINT_ORDER_BITWIDTH) - 1);
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switch (component) {
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case NS_STYLE_PAINT_ORDER_FILL:
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Render(&aContext, eRenderFill, newMatrix);
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break;
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case NS_STYLE_PAINT_ORDER_STROKE:
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Render(&aContext, eRenderStroke, newMatrix);
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break;
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case NS_STYLE_PAINT_ORDER_MARKERS:
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PaintMarkers(aContext, aTransform);
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break;
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}
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paintOrder >>= NS_STYLE_PAINT_ORDER_BITWIDTH;
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}
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}
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return DrawResult::SUCCESS;
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}
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nsIFrame*
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nsSVGPathGeometryFrame::GetFrameForPoint(const gfxPoint& aPoint)
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{
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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 =
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nsLayoutUtils::RectToGfxRect(mRect, PresContext()->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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nsSVGPathGeometryElement* content =
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static_cast<nsSVGPathGeometryElement*>(mContent);
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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, StyleContext(), 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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return nullptr;
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}
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nsRect
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nsSVGPathGeometryFrame::GetCoveredRegion()
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{
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gfxMatrix canvasTM = GetCanvasTM();
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if (canvasTM.PreservesAxisAlignedRectangles()) {
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return nsSVGUtils::TransformFrameRectToOuterSVG(
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mRect, canvasTM, PresContext());
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}
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// To get tight bounds we need to compute directly in outer SVG coordinates
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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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gfxRect extent =
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GetBBoxContribution(ToMatrix(canvasTM), flags).ToThebesRect();
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nsRect region = nsLayoutUtils::RoundGfxRectToAppRect(
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extent, PresContext()->AppUnitsPerCSSPixel());
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return nsSVGUtils::TransformFrameRectToOuterSVG(
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region, gfxMatrix(), PresContext());
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}
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void
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nsSVGPathGeometryFrame::ReflowSVG()
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{
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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,
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PresContext()->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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nsSVGEffects::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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mState &= ~(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
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nsSVGPathGeometryFrame::NotifySVGChanged(uint32_t aFlags)
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{
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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) {
|
|
// 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.
|
|
if (static_cast<nsSVGPathGeometryElement*>(mContent)->GeometryDependsOnCoordCtx() ||
|
|
StyleSVG()->mStrokeWidth.HasPercent()) {
|
|
static_cast<nsSVGPathGeometryElement*>(mContent)->ClearAnyCachedPath();
|
|
nsSVGUtils::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|.
|
|
nsSVGUtils::ScheduleReflowSVG(this);
|
|
}
|
|
}
|
|
|
|
SVGBBox
|
|
nsSVGPathGeometryFrame::GetBBoxContribution(const Matrix &aToBBoxUserspace,
|
|
uint32_t aFlags)
|
|
{
|
|
SVGBBox bbox;
|
|
|
|
if (aToBBoxUserspace.IsSingular()) {
|
|
// XXX ReportToConsole
|
|
return bbox;
|
|
}
|
|
|
|
nsSVGPathGeometryElement* element =
|
|
static_cast<nsSVGPathGeometryElement*>(mContent);
|
|
|
|
bool getFill = (aFlags & nsSVGUtils::eBBoxIncludeFillGeometry) ||
|
|
((aFlags & nsSVGUtils::eBBoxIncludeFill) &&
|
|
StyleSVG()->mFill.Type() != eStyleSVGPaintType_None);
|
|
|
|
bool getStroke = (aFlags & nsSVGUtils::eBBoxIncludeStrokeGeometry) ||
|
|
((aFlags & nsSVGUtils::eBBoxIncludeStroke) &&
|
|
nsSVGUtils::HasStroke(this));
|
|
|
|
SVGContentUtils::AutoStrokeOptions strokeOptions;
|
|
if (getStroke) {
|
|
SVGContentUtils::GetStrokeOptions(&strokeOptions, element,
|
|
StyleContext(), 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::GetPlatform()->
|
|
CreateDrawTargetForSurface(refSurf, IntSize(1, 1));
|
|
#else
|
|
tmpDT = gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget();
|
|
#endif
|
|
|
|
FillRule fillRule = nsSVGUtils::ToFillRule(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 nsSVGPathGeometryFrame::Reflow() inserts a scale
|
|
// into aToBBoxUserspace and then scales the bounds that we return.
|
|
SVGContentUtils::AutoStrokeOptions strokeOptions;
|
|
SVGContentUtils::GetStrokeOptions(&strokeOptions, element,
|
|
StyleContext(), 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 &&
|
|
static_cast<nsSVGPathGeometryElement*>(mContent)->IsMarkable()) {
|
|
|
|
float strokeWidth = nsSVGUtils::GetStrokeWidth(this);
|
|
MarkerProperties properties = GetMarkerProperties(this);
|
|
|
|
if (properties.MarkersExist()) {
|
|
nsTArray<nsSVGMark> marks;
|
|
static_cast<nsSVGPathGeometryElement*>(mContent)->GetMarkPoints(&marks);
|
|
uint32_t num = marks.Length();
|
|
|
|
// These are in the same order as the nsSVGMark::Type constants.
|
|
nsSVGMarkerFrame* markerFrames[] = {
|
|
properties.GetMarkerStartFrame(),
|
|
properties.GetMarkerMidFrame(),
|
|
properties.GetMarkerEndFrame(),
|
|
};
|
|
static_assert(MOZ_ARRAY_LENGTH(markerFrames) == nsSVGMark::eTypeCount,
|
|
"Number of Marker frames should be equal to eTypeCount");
|
|
|
|
for (uint32_t i = 0; i < num; i++) {
|
|
nsSVGMark& mark = marks[i];
|
|
nsSVGMarkerFrame* frame = markerFrames[mark.type];
|
|
if (frame) {
|
|
SVGBBox mbbox =
|
|
frame->GetMarkBBoxContribution(aToBBoxUserspace, aFlags, this,
|
|
&marks[i], strokeWidth);
|
|
MOZ_ASSERT(mbbox.IsFinite(), "bbox is about to go bad");
|
|
bbox.UnionEdges(mbbox);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return bbox;
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// nsSVGPathGeometryFrame methods:
|
|
|
|
gfxMatrix
|
|
nsSVGPathGeometryFrame::GetCanvasTM()
|
|
{
|
|
NS_ASSERTION(GetParent(), "null parent");
|
|
|
|
nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(GetParent());
|
|
dom::SVGGraphicsElement *content = static_cast<dom::SVGGraphicsElement*>(mContent);
|
|
|
|
return content->PrependLocalTransformsTo(parent->GetCanvasTM());
|
|
}
|
|
|
|
nsSVGPathGeometryFrame::MarkerProperties
|
|
nsSVGPathGeometryFrame::GetMarkerProperties(nsSVGPathGeometryFrame *aFrame)
|
|
{
|
|
NS_ASSERTION(!aFrame->GetPrevContinuation(), "aFrame should be first continuation");
|
|
|
|
MarkerProperties result;
|
|
nsCOMPtr<nsIURI> markerURL =
|
|
nsSVGEffects::GetMarkerURI(aFrame, &nsStyleSVG::mMarkerStart);
|
|
result.mMarkerStart =
|
|
nsSVGEffects::GetMarkerProperty(markerURL, aFrame,
|
|
nsSVGEffects::MarkerBeginProperty());
|
|
|
|
markerURL = nsSVGEffects::GetMarkerURI(aFrame, &nsStyleSVG::mMarkerMid);
|
|
result.mMarkerMid =
|
|
nsSVGEffects::GetMarkerProperty(markerURL, aFrame,
|
|
nsSVGEffects::MarkerMiddleProperty());
|
|
|
|
markerURL = nsSVGEffects::GetMarkerURI(aFrame, &nsStyleSVG::mMarkerEnd);
|
|
result.mMarkerEnd =
|
|
nsSVGEffects::GetMarkerProperty(markerURL, aFrame,
|
|
nsSVGEffects::MarkerEndProperty());
|
|
return result;
|
|
}
|
|
|
|
nsSVGMarkerFrame *
|
|
nsSVGPathGeometryFrame::MarkerProperties::GetMarkerStartFrame()
|
|
{
|
|
if (!mMarkerStart)
|
|
return nullptr;
|
|
return static_cast<nsSVGMarkerFrame *>
|
|
(mMarkerStart->GetReferencedFrame(nsGkAtoms::svgMarkerFrame, nullptr));
|
|
}
|
|
|
|
nsSVGMarkerFrame *
|
|
nsSVGPathGeometryFrame::MarkerProperties::GetMarkerMidFrame()
|
|
{
|
|
if (!mMarkerMid)
|
|
return nullptr;
|
|
return static_cast<nsSVGMarkerFrame *>
|
|
(mMarkerMid->GetReferencedFrame(nsGkAtoms::svgMarkerFrame, nullptr));
|
|
}
|
|
|
|
nsSVGMarkerFrame *
|
|
nsSVGPathGeometryFrame::MarkerProperties::GetMarkerEndFrame()
|
|
{
|
|
if (!mMarkerEnd)
|
|
return nullptr;
|
|
return static_cast<nsSVGMarkerFrame *>
|
|
(mMarkerEnd->GetReferencedFrame(nsGkAtoms::svgMarkerFrame, nullptr));
|
|
}
|
|
|
|
void
|
|
nsSVGPathGeometryFrame::Render(gfxContext* aContext,
|
|
uint32_t aRenderComponents,
|
|
const gfxMatrix& aNewTransform)
|
|
{
|
|
MOZ_ASSERT(!aNewTransform.IsSingular());
|
|
|
|
DrawTarget* drawTarget = aContext->GetDrawTarget();
|
|
|
|
FillRule fillRule =
|
|
nsSVGUtils::ToFillRule((GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD) ?
|
|
StyleSVG()->mClipRule : StyleSVG()->mFillRule);
|
|
|
|
nsSVGPathGeometryElement* element =
|
|
static_cast<nsSVGPathGeometryElement*>(mContent);
|
|
|
|
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->SetMatrix(aNewTransform);
|
|
|
|
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;
|
|
}
|
|
|
|
nsSVGPathGeometryElement::SimplePath simplePath;
|
|
RefPtr<Path> path;
|
|
|
|
element->GetAsSimplePath(&simplePath);
|
|
if (!simplePath.IsPath()) {
|
|
path = element->GetOrBuildPath(*drawTarget, fillRule);
|
|
if (!path) {
|
|
return;
|
|
}
|
|
}
|
|
|
|
SVGContextPaint* contextPaint = SVGContextPaint::GetContextPaint(mContent);
|
|
|
|
if (aRenderComponents & eRenderFill) {
|
|
GeneralPattern fillPattern;
|
|
nsSVGUtils::MakeFillPatternFor(this, aContext, &fillPattern, 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, contextPaint);
|
|
if (strokePattern.GetPattern()) {
|
|
SVGContentUtils::AutoStrokeOptions strokeOptions;
|
|
SVGContentUtils::GetStrokeOptions(&strokeOptions,
|
|
static_cast<nsSVGElement*>(mContent),
|
|
StyleContext(), 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
|
|
nsSVGPathGeometryFrame::PaintMarkers(gfxContext& aContext,
|
|
const gfxMatrix& aTransform)
|
|
{
|
|
SVGContextPaint* contextPaint = SVGContextPaint::GetContextPaint(mContent);
|
|
|
|
if (static_cast<nsSVGPathGeometryElement*>(mContent)->IsMarkable()) {
|
|
MarkerProperties properties = GetMarkerProperties(this);
|
|
|
|
if (properties.MarkersExist()) {
|
|
float strokeWidth = nsSVGUtils::GetStrokeWidth(this, contextPaint);
|
|
|
|
nsTArray<nsSVGMark> marks;
|
|
static_cast<nsSVGPathGeometryElement*>
|
|
(mContent)->GetMarkPoints(&marks);
|
|
|
|
uint32_t num = marks.Length();
|
|
if (num) {
|
|
// These are in the same order as the nsSVGMark::Type constants.
|
|
nsSVGMarkerFrame* markerFrames[] = {
|
|
properties.GetMarkerStartFrame(),
|
|
properties.GetMarkerMidFrame(),
|
|
properties.GetMarkerEndFrame(),
|
|
};
|
|
static_assert(MOZ_ARRAY_LENGTH(markerFrames) == nsSVGMark::eTypeCount,
|
|
"Number of Marker frames should be equal to eTypeCount");
|
|
|
|
for (uint32_t i = 0; i < num; i++) {
|
|
nsSVGMark& mark = marks[i];
|
|
nsSVGMarkerFrame* frame = markerFrames[mark.type];
|
|
if (frame) {
|
|
frame->PaintMark(aContext, aTransform, this, &mark, strokeWidth);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
uint16_t
|
|
nsSVGPathGeometryFrame::GetHitTestFlags()
|
|
{
|
|
return nsSVGUtils::GetGeometryHitTestFlags(this);
|
|
}
|