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609 lines
20 KiB
C++
609 lines
20 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 "gfxContext.h"
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#include "gfxPlatform.h"
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#include "gfxSVGGlyphs.h"
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#include "nsDisplayList.h"
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#include "nsGkAtoms.h"
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#include "nsRenderingContext.h"
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#include "nsSVGEffects.h"
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#include "nsSVGGraphicElement.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 "SVGAnimatedTransformList.h"
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using namespace mozilla;
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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_TAIL_INHERITING(nsSVGPathGeometryFrameBase)
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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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NS_ABORT_IF_FALSE(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);
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virtual void Paint(nsDisplayListBuilder* aBuilder,
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nsRenderingContext* aCtx);
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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 userSpacePt = pointRelativeToReferenceFrame -
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(ToReferenceFrame() - frame->GetPosition());
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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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// 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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aCtx->PushState();
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aCtx->Translate(offset);
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static_cast<nsSVGPathGeometryFrame*>(mFrame)->PaintSVG(aCtx, nullptr);
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aCtx->PopState();
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}
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//----------------------------------------------------------------------
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// nsIFrame methods
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NS_IMETHODIMP
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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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if (aNameSpaceID == kNameSpaceID_None &&
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(static_cast<nsSVGPathGeometryElement*>
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(mContent)->AttributeDefinesGeometry(aAttribute) ||
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aAttribute == nsGkAtoms::transform)) {
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nsSVGUtils::InvalidateBounds(this, false);
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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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nsSVGPathGeometryFrameBase::DidSetStyleContext(aOldStyleContext);
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// XXX: we'd like to use the style_hint mechanism and the
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// ContentStateChanged/AttributeChanged functions for style changes
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// to get slightly finer granularity, but unfortunately the
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// style_hints don't map very well onto svg. Here seems to be the
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// best place to deal with style changes:
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nsSVGUtils::InvalidateBounds(this, false);
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nsSVGUtils::ScheduleReflowSVG(this);
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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(gfxMatrix *aOwnTransform,
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gfxMatrix *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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if (content->GetAnimatedTransformList() ||
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content->GetAnimateMotionTransform()) {
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if (aOwnTransform) {
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*aOwnTransform = content->PrependLocalTransformsTo(gfxMatrix(),
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nsSVGElement::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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NS_IMETHODIMP
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nsSVGPathGeometryFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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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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return NS_OK;
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}
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return 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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NS_IMETHODIMP
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nsSVGPathGeometryFrame::PaintSVG(nsRenderingContext *aContext,
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const nsIntRect *aDirtyRect)
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{
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if (!GetStyleVisibility()->IsVisible())
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return NS_OK;
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/* render */
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Render(aContext);
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gfxTextObjectPaint *objectPaint =
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(gfxTextObjectPaint*)aContext->GetUserData(&gfxTextObjectPaint::sUserDataKey);
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if (static_cast<nsSVGPathGeometryElement*>(mContent)->IsMarkable()) {
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MarkerProperties properties = GetMarkerProperties(this);
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if (properties.MarkersExist()) {
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float strokeWidth = nsSVGUtils::GetStrokeWidth(this, objectPaint);
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nsTArray<nsSVGMark> marks;
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static_cast<nsSVGPathGeometryElement*>
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(mContent)->GetMarkPoints(&marks);
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uint32_t num = marks.Length();
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if (num) {
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nsSVGMarkerFrame *frame = properties.GetMarkerStartFrame();
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if (frame)
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frame->PaintMark(aContext, this, &marks[0], strokeWidth);
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frame = properties.GetMarkerMidFrame();
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if (frame) {
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for (uint32_t i = 1; i < num - 1; i++)
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frame->PaintMark(aContext, this, &marks[i], strokeWidth);
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}
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frame = properties.GetMarkerEndFrame();
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if (frame)
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frame->PaintMark(aContext, this, &marks[num-1], strokeWidth);
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}
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}
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}
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return NS_OK;
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}
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NS_IMETHODIMP_(nsIFrame*)
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nsSVGPathGeometryFrame::GetFrameForPoint(const nsPoint &aPoint)
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{
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gfxMatrix canvasTM = GetCanvasTM(FOR_HIT_TESTING);
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if (canvasTM.IsSingular()) {
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return nullptr;
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}
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uint16_t fillRule, 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 = GetClipRule();
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} else {
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hitTestFlags = GetHitTestFlags();
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// XXX once bug 614732 is fixed, aPoint won't need any conversion in order
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// to compare it with mRect.
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nsPoint point =
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nsSVGUtils::TransformOuterSVGPointToChildFrame(aPoint, canvasTM, PresContext());
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if (!hitTestFlags || ((hitTestFlags & SVG_HIT_TEST_CHECK_MRECT) &&
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!mRect.Contains(point)))
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return nullptr;
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fillRule = GetStyleSVG()->mFillRule;
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}
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bool isHit = false;
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nsRefPtr<gfxContext> tmpCtx =
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new gfxContext(gfxPlatform::GetPlatform()->ScreenReferenceSurface());
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GeneratePath(tmpCtx, canvasTM);
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gfxPoint userSpacePoint =
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tmpCtx->DeviceToUser(gfxPoint(PresContext()->AppUnitsToGfxUnits(aPoint.x),
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PresContext()->AppUnitsToGfxUnits(aPoint.y)));
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if (fillRule == NS_STYLE_FILL_RULE_EVENODD)
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tmpCtx->SetFillRule(gfxContext::FILL_RULE_EVEN_ODD);
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else
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tmpCtx->SetFillRule(gfxContext::FILL_RULE_WINDING);
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if (hitTestFlags & SVG_HIT_TEST_FILL)
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isHit = tmpCtx->PointInFill(userSpacePoint);
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if (!isHit && (hitTestFlags & SVG_HIT_TEST_STROKE)) {
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nsSVGUtils::SetupCairoStrokeHitGeometry(this, tmpCtx);
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isHit = tmpCtx->PointInStroke(userSpacePoint);
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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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NS_IMETHODIMP_(nsRect)
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nsSVGPathGeometryFrame::GetCoveredRegion()
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{
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return nsSVGUtils::TransformFrameRectToOuterSVG(
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mRect, GetCanvasTM(FOR_OUTERSVG_TM), 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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NS_ABORT_IF_FALSE(!(GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD),
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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(gfxMatrix(), flags);
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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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NS_ABORT_IF_FALSE(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
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"Invalidation logic may need adjusting");
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// Ancestor changes can't affect how we render from the perspective of
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// any rendering observers that we may have, so we don't need to
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// invalidate them. We also don't need to invalidate ourself, since our
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// changed ancestor will have invalidated its entire area, which includes
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// our area.
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nsSVGUtils::ScheduleReflowSVG(this);
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}
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SVGBBox
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nsSVGPathGeometryFrame::GetBBoxContribution(const gfxMatrix &aToBBoxUserspace,
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uint32_t aFlags)
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{
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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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nsRefPtr<gfxContext> tmpCtx =
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new gfxContext(gfxPlatform::GetPlatform()->ScreenReferenceSurface());
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GeneratePath(tmpCtx, aToBBoxUserspace);
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tmpCtx->IdentityMatrix();
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// Be careful when replacing the following logic to get the fill and stroke
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// extents independently (instead of computing the stroke extents from the
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// path extents). You may think that you can just use the stroke extents if
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// there is both a fill and a stroke. In reality it's necessary to calculate
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// both the fill and stroke extents, and take the union of the two. There are
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// two reasons for this:
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//
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// # Due to stroke dashing, in certain cases the fill extents could actually
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// extend outside the stroke extents.
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// # If the stroke is very thin, cairo won't paint any stroke, and so the
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// stroke bounds that it will return will be empty.
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gfxRect pathExtents = tmpCtx->GetUserPathExtent();
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// Account for fill:
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if ((aFlags & nsSVGUtils::eBBoxIncludeFillGeometry) ||
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((aFlags & nsSVGUtils::eBBoxIncludeFill) &&
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GetStyleSVG()->mFill.mType != eStyleSVGPaintType_None)) {
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bbox = pathExtents;
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}
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// Account for stroke:
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if ((aFlags & nsSVGUtils::eBBoxIncludeStrokeGeometry) ||
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((aFlags & nsSVGUtils::eBBoxIncludeStroke) &&
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nsSVGUtils::HasStroke(this))) {
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// We can't use tmpCtx->GetUserStrokeExtent() since it doesn't work for
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// device space extents. Instead we approximate the stroke extents from
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// pathExtents using PathExtentsToMaxStrokeExtents.
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if (pathExtents.Width() <= 0 && pathExtents.Height() <= 0) {
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// We have a zero length path, but it may still have non-empty stroke
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// bounds depending on the value of stroke-linecap. We need to fix up
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// pathExtents before it can be used with PathExtentsToMaxStrokeExtents
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// though, because if pathExtents is empty, its position will not have
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// been set. Happily we can use tmpCtx->GetUserStrokeExtent() to find
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// the center point of the extents even though it gets the extents wrong.
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nsSVGUtils::SetupCairoStrokeGeometry(this, tmpCtx);
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pathExtents.MoveTo(tmpCtx->GetUserStrokeExtent().Center());
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pathExtents.SizeTo(0, 0);
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}
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bbox.UnionEdges(nsSVGUtils::PathExtentsToMaxStrokeExtents(pathExtents,
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this,
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aToBBoxUserspace));
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}
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// Account for markers:
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if ((aFlags & nsSVGUtils::eBBoxIncludeMarkers) != 0 &&
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static_cast<nsSVGPathGeometryElement*>(mContent)->IsMarkable()) {
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float strokeWidth = nsSVGUtils::GetStrokeWidth(this);
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MarkerProperties properties = GetMarkerProperties(this);
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if (properties.MarkersExist()) {
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nsTArray<nsSVGMark> marks;
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static_cast<nsSVGPathGeometryElement*>(mContent)->GetMarkPoints(&marks);
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uint32_t num = marks.Length();
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if (num) {
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nsSVGMarkerFrame *frame = properties.GetMarkerStartFrame();
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if (frame) {
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SVGBBox mbbox =
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frame->GetMarkBBoxContribution(aToBBoxUserspace, aFlags, this,
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&marks[0], strokeWidth);
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bbox.UnionEdges(mbbox);
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}
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frame = properties.GetMarkerMidFrame();
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if (frame) {
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for (uint32_t i = 1; i < num - 1; i++) {
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SVGBBox mbbox =
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frame->GetMarkBBoxContribution(aToBBoxUserspace, aFlags, this,
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&marks[i], strokeWidth);
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bbox.UnionEdges(mbbox);
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}
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}
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frame = properties.GetMarkerEndFrame();
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if (frame) {
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SVGBBox mbbox =
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frame->GetMarkBBoxContribution(aToBBoxUserspace, aFlags, this,
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&marks[num-1], strokeWidth);
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bbox.UnionEdges(mbbox);
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}
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}
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}
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}
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return bbox;
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}
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//----------------------------------------------------------------------
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// nsSVGGeometryFrame methods:
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gfxMatrix
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nsSVGPathGeometryFrame::GetCanvasTM(uint32_t aFor)
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{
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if (!(GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD)) {
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if ((aFor == FOR_PAINTING && NS_SVGDisplayListPaintingEnabled()) ||
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(aFor == FOR_HIT_TESTING && NS_SVGDisplayListHitTestingEnabled())) {
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return nsSVGIntegrationUtils::GetCSSPxToDevPxMatrix(this);
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}
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}
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NS_ASSERTION(mParent, "null parent");
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nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(mParent);
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nsSVGGraphicElement *content = static_cast<nsSVGGraphicElement*>(mContent);
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return content->PrependLocalTransformsTo(parent->GetCanvasTM(aFor));
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}
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//----------------------------------------------------------------------
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// nsSVGPathGeometryFrame methods:
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nsSVGPathGeometryFrame::MarkerProperties
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nsSVGPathGeometryFrame::GetMarkerProperties(nsSVGPathGeometryFrame *aFrame)
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{
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NS_ASSERTION(!aFrame->GetPrevContinuation(), "aFrame should be first continuation");
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MarkerProperties result;
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const nsStyleSVG *style = aFrame->GetStyleSVG();
|
|
result.mMarkerStart =
|
|
nsSVGEffects::GetMarkerProperty(style->mMarkerStart, aFrame,
|
|
nsSVGEffects::MarkerBeginProperty());
|
|
result.mMarkerMid =
|
|
nsSVGEffects::GetMarkerProperty(style->mMarkerMid, aFrame,
|
|
nsSVGEffects::MarkerMiddleProperty());
|
|
result.mMarkerEnd =
|
|
nsSVGEffects::GetMarkerProperty(style->mMarkerEnd, 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(nsRenderingContext *aContext)
|
|
{
|
|
gfxContext *gfx = aContext->ThebesContext();
|
|
|
|
uint16_t renderMode = SVGAutoRenderState::GetRenderMode(aContext);
|
|
|
|
switch (GetStyleSVG()->mShapeRendering) {
|
|
case NS_STYLE_SHAPE_RENDERING_OPTIMIZESPEED:
|
|
case NS_STYLE_SHAPE_RENDERING_CRISPEDGES:
|
|
gfx->SetAntialiasMode(gfxContext::MODE_ALIASED);
|
|
break;
|
|
default:
|
|
gfx->SetAntialiasMode(gfxContext::MODE_COVERAGE);
|
|
break;
|
|
}
|
|
|
|
/* save/restore the state so we don't screw up the xform */
|
|
gfx->Save();
|
|
|
|
GeneratePath(gfx, GetCanvasTM(FOR_PAINTING));
|
|
|
|
if (renderMode != SVGAutoRenderState::NORMAL) {
|
|
NS_ABORT_IF_FALSE(renderMode == SVGAutoRenderState::CLIP ||
|
|
renderMode == SVGAutoRenderState::CLIP_MASK,
|
|
"Unknown render mode");
|
|
gfx->Restore();
|
|
|
|
if (GetClipRule() == NS_STYLE_FILL_RULE_EVENODD)
|
|
gfx->SetFillRule(gfxContext::FILL_RULE_EVEN_ODD);
|
|
else
|
|
gfx->SetFillRule(gfxContext::FILL_RULE_WINDING);
|
|
|
|
if (renderMode == SVGAutoRenderState::CLIP_MASK) {
|
|
gfx->SetColor(gfxRGBA(1.0f, 1.0f, 1.0f, 1.0f));
|
|
gfx->Fill();
|
|
gfx->NewPath();
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
gfxTextObjectPaint *objectPaint =
|
|
(gfxTextObjectPaint*)aContext->GetUserData(&gfxTextObjectPaint::sUserDataKey);
|
|
|
|
if (nsSVGUtils::SetupCairoFillPaint(this, gfx, objectPaint)) {
|
|
gfx->Fill();
|
|
}
|
|
|
|
if (nsSVGUtils::HasStroke(this, objectPaint)) {
|
|
nsSVGUtils::SetupCairoStrokeHitGeometry(this, gfx, objectPaint);
|
|
if (nsSVGUtils::SetupCairoStrokePaint(this, gfx, objectPaint)) {
|
|
gfx->Stroke();
|
|
}
|
|
}
|
|
|
|
gfx->NewPath();
|
|
|
|
gfx->Restore();
|
|
}
|
|
|
|
void
|
|
nsSVGPathGeometryFrame::GeneratePath(gfxContext* aContext,
|
|
const gfxMatrix &aTransform)
|
|
{
|
|
if (aTransform.IsSingular()) {
|
|
aContext->IdentityMatrix();
|
|
aContext->NewPath();
|
|
return;
|
|
}
|
|
|
|
aContext->MultiplyAndNudgeToIntegers(aTransform);
|
|
|
|
// Hack to let SVGPathData::ConstructPath know if we have square caps:
|
|
const nsStyleSVG* style = GetStyleSVG();
|
|
if (style->mStrokeLinecap == NS_STYLE_STROKE_LINECAP_SQUARE) {
|
|
aContext->SetLineCap(gfxContext::LINE_CAP_SQUARE);
|
|
}
|
|
|
|
aContext->NewPath();
|
|
static_cast<nsSVGPathGeometryElement*>(mContent)->ConstructPath(aContext);
|
|
}
|