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gecko-dev/layout/svg/SVGGeometryFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// Main header first:
#include "SVGGeometryFrame.h"
// Keep others in (case-insensitive) order:
#include "gfx2DGlue.h"
#include "gfxContext.h"
#include "gfxPlatform.h"
#include "gfxUtils.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/Helpers.h"
#include "mozilla/RefPtr.h"
#include "mozilla/SVGContextPaint.h"
#include "nsDisplayList.h"
#include "nsGkAtoms.h"
#include "nsLayoutUtils.h"
#include "SVGObserverUtils.h"
#include "nsSVGIntegrationUtils.h"
#include "nsSVGMarkerFrame.h"
#include "SVGGeometryElement.h"
#include "nsSVGUtils.h"
#include "mozilla/ArrayUtils.h"
#include "SVGAnimatedTransformList.h"
#include "SVGContentUtils.h"
#include "SVGGraphicsElement.h"
using namespace mozilla;
using namespace mozilla::dom;
using namespace mozilla::gfx;
using namespace mozilla::image;
//----------------------------------------------------------------------
// Implementation
nsIFrame*
NS_NewSVGGeometryFrame(nsIPresShell* aPresShell,
nsStyleContext* aContext)
{
return new (aPresShell) SVGGeometryFrame(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(SVGGeometryFrame)
//----------------------------------------------------------------------
// nsQueryFrame methods
NS_QUERYFRAME_HEAD(SVGGeometryFrame)
NS_QUERYFRAME_ENTRY(nsSVGDisplayableFrame)
NS_QUERYFRAME_ENTRY(SVGGeometryFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsFrame)
//----------------------------------------------------------------------
// Display list item:
class nsDisplaySVGGeometry : public nsDisplayItem {
typedef mozilla::image::imgDrawingParams imgDrawingParams;
public:
nsDisplaySVGGeometry(nsDisplayListBuilder* aBuilder,
SVGGeometryFrame* aFrame)
: nsDisplayItem(aBuilder, aFrame)
{
MOZ_COUNT_CTOR(nsDisplaySVGGeometry);
MOZ_ASSERT(aFrame, "Must have a frame!");
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplaySVGGeometry() {
MOZ_COUNT_DTOR(nsDisplaySVGGeometry);
}
#endif
NS_DISPLAY_DECL_NAME("nsDisplaySVGGeometry", TYPE_SVG_GEOMETRY)
virtual void HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) override;
virtual void Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx) override;
nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder) override
{
return new nsDisplayItemGenericImageGeometry(this, aBuilder);
}
void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion *aInvalidRegion) const override;
};
void
nsDisplaySVGGeometry::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
{
SVGGeometryFrame *frame = static_cast<SVGGeometryFrame*>(mFrame);
nsPoint pointRelativeToReferenceFrame = aRect.Center();
// ToReferenceFrame() includes frame->GetPosition(), our user space position.
nsPoint userSpacePtInAppUnits = pointRelativeToReferenceFrame -
(ToReferenceFrame() - frame->GetPosition());
gfxPoint userSpacePt =
gfxPoint(userSpacePtInAppUnits.x, userSpacePtInAppUnits.y) /
frame->PresContext()->AppUnitsPerCSSPixel();
if (frame->GetFrameForPoint(userSpacePt)) {
aOutFrames->AppendElement(frame);
}
}
void
nsDisplaySVGGeometry::Paint(nsDisplayListBuilder* aBuilder,
gfxContext* aCtx)
{
uint32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
// ToReferenceFrame includes our mRect offset, but painting takes
// account of that too. To avoid double counting, we subtract that
// here.
nsPoint offset = ToReferenceFrame() - mFrame->GetPosition();
gfxPoint devPixelOffset =
nsLayoutUtils::PointToGfxPoint(offset, appUnitsPerDevPixel);
gfxMatrix tm = nsSVGUtils::GetCSSPxToDevPxMatrix(mFrame) *
gfxMatrix::Translation(devPixelOffset);
imgDrawingParams imgParams(aBuilder->ShouldSyncDecodeImages()
? imgIContainer::FLAG_SYNC_DECODE
: imgIContainer::FLAG_SYNC_DECODE_IF_FAST);
static_cast<SVGGeometryFrame*>(mFrame)->PaintSVG(*aCtx,
tm, imgParams);
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, imgParams.result);
}
void
nsDisplaySVGGeometry::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion* aInvalidRegion) const
{
auto geometry =
static_cast<const nsDisplayItemGenericImageGeometry*>(aGeometry);
if (aBuilder->ShouldSyncDecodeImages() &&
geometry->ShouldInvalidateToSyncDecodeImages()) {
bool snap;
aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
}
nsDisplayItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
}
namespace mozilla {
//----------------------------------------------------------------------
// nsIFrame methods
void
SVGGeometryFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow)
{
AddStateBits(aParent->GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD);
nsFrame::Init(aContent, aParent, aPrevInFlow);
}
nsresult
SVGGeometryFrame::AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType)
{
// We don't invalidate for transform changes (the layers code does that).
// Also note that SVGTransformableElement::GetAttributeChangeHint will
// return nsChangeHint_UpdateOverflow for "transform" attribute changes
// and cause DoApplyRenderingChangeToTree to make the SchedulePaint call.
if (aNameSpaceID == kNameSpaceID_None &&
(static_cast<SVGGeometryElement*>
(GetContent())->AttributeDefinesGeometry(aAttribute))) {
nsLayoutUtils::PostRestyleEvent(
mContent->AsElement(), nsRestyleHint(0),
nsChangeHint_InvalidateRenderingObservers);
nsSVGUtils::ScheduleReflowSVG(this);
}
return NS_OK;
}
/* virtual */ void
SVGGeometryFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext)
{
nsFrame::DidSetStyleContext(aOldStyleContext);
if (aOldStyleContext) {
SVGGeometryElement* element =
static_cast<SVGGeometryElement*>(GetContent());
auto oldStyleSVG = aOldStyleContext->PeekStyleSVG();
if (oldStyleSVG && !SVGContentUtils::ShapeTypeHasNoCorners(GetContent())) {
if (StyleSVG()->mStrokeLinecap != oldStyleSVG->mStrokeLinecap &&
element->IsSVGElement(nsGkAtoms::path)) {
// If the stroke-linecap changes to or from "butt" then our element
// needs to update its cached Moz2D Path, since SVGPathData::BuildPath
// decides whether or not to insert little lines into the path for zero
// length subpaths base on that property.
element->ClearAnyCachedPath();
} else if (GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD) {
if (StyleSVG()->mClipRule != oldStyleSVG->mClipRule) {
// Moz2D Path objects are fill-rule specific.
// For clipPath we use clip-rule as the path's fill-rule.
element->ClearAnyCachedPath();
}
} else {
if (StyleSVG()->mFillRule != oldStyleSVG->mFillRule) {
// Moz2D Path objects are fill-rule specific.
element->ClearAnyCachedPath();
}
}
}
}
}
bool
SVGGeometryFrame::IsSVGTransformed(gfx::Matrix *aOwnTransform,
gfx::Matrix *aFromParentTransform) const
{
bool foundTransform = false;
// Check if our parent has children-only transforms:
nsIFrame *parent = GetParent();
if (parent &&
parent->IsFrameOfType(nsIFrame::eSVG | nsIFrame::eSVGContainer)) {
foundTransform = static_cast<nsSVGContainerFrame*>(parent)->
HasChildrenOnlyTransform(aFromParentTransform);
}
nsSVGElement *content = static_cast<nsSVGElement*>(GetContent());
nsSVGAnimatedTransformList* transformList =
content->GetAnimatedTransformList();
if ((transformList && transformList->HasTransform()) ||
content->GetAnimateMotionTransform()) {
if (aOwnTransform) {
*aOwnTransform = gfx::ToMatrix(
content->PrependLocalTransformsTo(
gfxMatrix(),
eUserSpaceToParent));
}
foundTransform = true;
}
return foundTransform;
}
void
SVGGeometryFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists)
{
if (!static_cast<const nsSVGElement*>(GetContent())->HasValidDimensions() ||
(!IsVisibleForPainting(aBuilder) && aBuilder->IsForPainting())) {
return;
}
DisplayOutline(aBuilder, aLists);
aLists.Content()->AppendNewToTop(
new (aBuilder) nsDisplaySVGGeometry(aBuilder, this));
}
//----------------------------------------------------------------------
// nsSVGDisplayableFrame methods
void
SVGGeometryFrame::PaintSVG(gfxContext& aContext,
const gfxMatrix& aTransform,
imgDrawingParams& aImgParams,
const nsIntRect* aDirtyRect)
{
if (!StyleVisibility()->IsVisible())
return;
// Matrix to the geometry's user space:
gfxMatrix newMatrix =
aContext.CurrentMatrix().PreMultiply(aTransform).NudgeToIntegers();
if (newMatrix.IsSingular()) {
return;
}
uint32_t paintOrder = StyleSVG()->mPaintOrder;
if (paintOrder == NS_STYLE_PAINT_ORDER_NORMAL) {
Render(&aContext, eRenderFill | eRenderStroke, newMatrix, aImgParams);
PaintMarkers(aContext, aTransform, aImgParams);
} else {
while (paintOrder) {
uint32_t component =
paintOrder & ((1 << NS_STYLE_PAINT_ORDER_BITWIDTH) - 1);
switch (component) {
case NS_STYLE_PAINT_ORDER_FILL:
Render(&aContext, eRenderFill, newMatrix, aImgParams);
break;
case NS_STYLE_PAINT_ORDER_STROKE:
Render(&aContext, eRenderStroke, newMatrix, aImgParams);
break;
case NS_STYLE_PAINT_ORDER_MARKERS:
PaintMarkers(aContext, aTransform, aImgParams);
break;
}
paintOrder >>= NS_STYLE_PAINT_ORDER_BITWIDTH;
}
}
}
nsIFrame*
SVGGeometryFrame::GetFrameForPoint(const gfxPoint& aPoint)
{
FillRule fillRule;
uint16_t hitTestFlags;
if (GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD) {
hitTestFlags = SVG_HIT_TEST_FILL;
fillRule = nsSVGUtils::ToFillRule(StyleSVG()->mClipRule);
} else {
hitTestFlags = GetHitTestFlags();
if (!hitTestFlags) {
return nullptr;
}
if (hitTestFlags & SVG_HIT_TEST_CHECK_MRECT) {
gfxRect rect =
nsLayoutUtils::RectToGfxRect(mRect, PresContext()->AppUnitsPerCSSPixel());
if (!rect.Contains(aPoint)) {
return nullptr;
}
}
fillRule = nsSVGUtils::ToFillRule(StyleSVG()->mFillRule);
}
bool isHit = false;
SVGGeometryElement* content =
static_cast<SVGGeometryElement*>(GetContent());
// Using ScreenReferenceDrawTarget() opens us to Moz2D backend specific hit-
// testing bugs. Maybe we should use a BackendType::CAIRO DT for hit-testing
// so that we get more consistent/backwards compatible results?
RefPtr<DrawTarget> drawTarget =
gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget();
RefPtr<Path> path = content->GetOrBuildPath(*drawTarget, fillRule);
if (!path) {
return nullptr; // no path, so we don't paint anything that can be hit
}
if (hitTestFlags & SVG_HIT_TEST_FILL) {
isHit = path->ContainsPoint(ToPoint(aPoint), Matrix());
}
if (!isHit && (hitTestFlags & SVG_HIT_TEST_STROKE)) {
Point point = ToPoint(aPoint);
SVGContentUtils::AutoStrokeOptions stroke;
SVGContentUtils::GetStrokeOptions(&stroke, content, StyleContext(), nullptr);
gfxMatrix userToOuterSVG;
if (nsSVGUtils::GetNonScalingStrokeTransform(this, &userToOuterSVG)) {
// We need to transform the path back into the appropriate ancestor
// coordinate system in order for non-scaled stroke to be correct.
// Naturally we also need to transform the point into the same
// coordinate system in order to hit-test against the path.
point = ToMatrix(userToOuterSVG).TransformPoint(point);
RefPtr<PathBuilder> builder =
path->TransformedCopyToBuilder(ToMatrix(userToOuterSVG), fillRule);
path = builder->Finish();
}
isHit = path->StrokeContainsPoint(stroke, point, Matrix());
}
if (isHit && nsSVGUtils::HitTestClip(this, aPoint))
return this;
return nullptr;
}
void
SVGGeometryFrame::ReflowSVG()
{
NS_ASSERTION(nsSVGUtils::OuterSVGIsCallingReflowSVG(this),
"This call is probably a wasteful mistake");
MOZ_ASSERT(!(GetStateBits() & NS_FRAME_IS_NONDISPLAY),
"ReflowSVG mechanism not designed for this");
if (!nsSVGUtils::NeedsReflowSVG(this)) {
return;
}
uint32_t flags = nsSVGUtils::eBBoxIncludeFill |
nsSVGUtils::eBBoxIncludeStroke |
nsSVGUtils::eBBoxIncludeMarkers;
// Our "visual" overflow rect needs to be valid for building display lists
// for hit testing, which means that for certain values of 'pointer-events'
// it needs to include the geometry of the fill or stroke even when the fill/
// stroke don't actually render (e.g. when stroke="none" or
// stroke-opacity="0"). GetHitTestFlags() accounts for 'pointer-events'.
uint16_t hitTestFlags = GetHitTestFlags();
if ((hitTestFlags & SVG_HIT_TEST_FILL)) {
flags |= nsSVGUtils::eBBoxIncludeFillGeometry;
}
if ((hitTestFlags & SVG_HIT_TEST_STROKE)) {
flags |= nsSVGUtils::eBBoxIncludeStrokeGeometry;
}
gfxRect extent = GetBBoxContribution(Matrix(), flags).ToThebesRect();
mRect = nsLayoutUtils::RoundGfxRectToAppRect(extent,
PresContext()->AppUnitsPerCSSPixel());
if (mState & NS_FRAME_FIRST_REFLOW) {
// Make sure we have our filter property (if any) before calling
// FinishAndStoreOverflow (subsequent filter changes are handled off
// nsChangeHint_UpdateEffects):
SVGObserverUtils::UpdateEffects(this);
}
nsRect overflow = nsRect(nsPoint(0,0), mRect.Size());
nsOverflowAreas overflowAreas(overflow, overflow);
FinishAndStoreOverflow(overflowAreas, mRect.Size());
RemoveStateBits(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
NS_FRAME_HAS_DIRTY_CHILDREN);
// Invalidate, but only if this is not our first reflow (since if it is our
// first reflow then we haven't had our first paint yet).
if (!(GetParent()->GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
InvalidateFrame();
}
}
void
SVGGeometryFrame::NotifySVGChanged(uint32_t aFlags)
{
MOZ_ASSERT(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
"Invalidation logic may need adjusting");
// Changes to our ancestors may affect how we render when we are rendered as
// part of our ancestor (specifically, if our coordinate context changes size
// and we have percentage lengths defining our geometry, then we need to be
// reflowed). However, ancestor changes cannot affect how we render when we
// are rendered as part of any rendering observers that we may have.
// Therefore no need to notify rendering observers here.
// Don't try to be too smart trying to avoid the ScheduleReflowSVG calls
// for the stroke properties examined below. Checking HasStroke() is not
// enough, since what we care about is whether we include the stroke in our
// overflow rects or not, and we sometimes deliberately include stroke
// when it's not visible. See the complexities of GetBBoxContribution.
if (aFlags & COORD_CONTEXT_CHANGED) {
// 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<SVGGeometryElement*>(GetContent())->GeometryDependsOnCoordCtx() ||
StyleSVG()->mStrokeWidth.HasPercent()) {
static_cast<SVGGeometryElement*>(GetContent())->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
SVGGeometryFrame::GetBBoxContribution(const Matrix &aToBBoxUserspace,
uint32_t aFlags)
{
SVGBBox bbox;
if (aToBBoxUserspace.IsSingular()) {
// XXX ReportToConsole
return bbox;
}
if ((aFlags & nsSVGUtils::eForGetClientRects) &&
aToBBoxUserspace.PreservesAxisAlignedRectangles()) {
Rect rect = NSRectToRect(mRect, PresContext()->AppUnitsPerCSSPixel());
bbox = aToBBoxUserspace.TransformBounds(rect);
return bbox;
}
SVGGeometryElement* element =
static_cast<SVGGeometryElement*>(GetContent());
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 SVGGeometryFrame::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<SVGGeometryElement*>(GetContent())->IsMarkable()) {
float strokeWidth = nsSVGUtils::GetStrokeWidth(this);
MarkerProperties properties = GetMarkerProperties(this);
if (properties.MarkersExist()) {
nsTArray<nsSVGMark> marks;
static_cast<SVGGeometryElement*>(GetContent())->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++) {
const nsSVGMark& mark = marks[i];
nsSVGMarkerFrame* frame = markerFrames[mark.type];
if (frame) {
SVGBBox mbbox =
frame->GetMarkBBoxContribution(aToBBoxUserspace, aFlags, this,
mark, strokeWidth);
MOZ_ASSERT(mbbox.IsFinite(), "bbox is about to go bad");
bbox.UnionEdges(mbbox);
}
}
}
}
return bbox;
}
//----------------------------------------------------------------------
// SVGGeometryFrame methods:
gfxMatrix
SVGGeometryFrame::GetCanvasTM()
{
NS_ASSERTION(GetParent(), "null parent");
nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(GetParent());
SVGGraphicsElement *content = static_cast<SVGGraphicsElement*>(GetContent());
return content->PrependLocalTransformsTo(parent->GetCanvasTM());
}
SVGGeometryFrame::MarkerProperties
SVGGeometryFrame::GetMarkerProperties(SVGGeometryFrame *aFrame)
{
NS_ASSERTION(!aFrame->GetPrevContinuation(), "aFrame should be first continuation");
MarkerProperties result;
nsCOMPtr<nsIURI> markerURL =
SVGObserverUtils::GetMarkerURI(aFrame, &nsStyleSVG::mMarkerStart);
result.mMarkerStart =
SVGObserverUtils::GetMarkerProperty(markerURL, aFrame,
SVGObserverUtils::MarkerBeginProperty());
markerURL = SVGObserverUtils::GetMarkerURI(aFrame, &nsStyleSVG::mMarkerMid);
result.mMarkerMid =
SVGObserverUtils::GetMarkerProperty(markerURL, aFrame,
SVGObserverUtils::MarkerMiddleProperty());
markerURL = SVGObserverUtils::GetMarkerURI(aFrame, &nsStyleSVG::mMarkerEnd);
result.mMarkerEnd =
SVGObserverUtils::GetMarkerProperty(markerURL, aFrame,
SVGObserverUtils::MarkerEndProperty());
return result;
}
nsSVGMarkerFrame *
SVGGeometryFrame::MarkerProperties::GetMarkerStartFrame()
{
if (!mMarkerStart)
return nullptr;
return static_cast<nsSVGMarkerFrame*>(
mMarkerStart->GetReferencedFrame(LayoutFrameType::SVGMarker, nullptr));
}
nsSVGMarkerFrame *
SVGGeometryFrame::MarkerProperties::GetMarkerMidFrame()
{
if (!mMarkerMid)
return nullptr;
return static_cast<nsSVGMarkerFrame*>(
mMarkerMid->GetReferencedFrame(LayoutFrameType::SVGMarker, nullptr));
}
nsSVGMarkerFrame *
SVGGeometryFrame::MarkerProperties::GetMarkerEndFrame()
{
if (!mMarkerEnd)
return nullptr;
return static_cast<nsSVGMarkerFrame*>(
mMarkerEnd->GetReferencedFrame(LayoutFrameType::SVGMarker, nullptr));
}
void
SVGGeometryFrame::Render(gfxContext* aContext,
uint32_t aRenderComponents,
const gfxMatrix& aNewTransform,
imgDrawingParams& aImgParams)
{
MOZ_ASSERT(!aNewTransform.IsSingular());
DrawTarget* drawTarget = aContext->GetDrawTarget();
FillRule fillRule =
nsSVGUtils::ToFillRule((GetStateBits() & NS_STATE_SVG_CLIPPATH_CHILD) ?
StyleSVG()->mClipRule : StyleSVG()->mFillRule);
SVGGeometryElement* element =
static_cast<SVGGeometryElement*>(GetContent());
AntialiasMode aaMode =
(StyleSVG()->mShapeRendering == NS_STYLE_SHAPE_RENDERING_OPTIMIZESPEED ||
StyleSVG()->mShapeRendering == NS_STYLE_SHAPE_RENDERING_CRISPEDGES) ?
AntialiasMode::NONE : AntialiasMode::SUBPIXEL;
// We wait as late as possible before setting the transform so that we don't
// set it unnecessarily if we return early (it's an expensive operation for
// some backends).
gfxContextMatrixAutoSaveRestore autoRestoreTransform(aContext);
aContext->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;
}
SVGGeometryElement::SimplePath simplePath;
RefPtr<Path> path;
element->GetAsSimplePath(&simplePath);
if (!simplePath.IsPath()) {
path = element->GetOrBuildPath(*drawTarget, fillRule);
if (!path) {
return;
}
}
SVGContextPaint* contextPaint = SVGContextPaint::GetContextPaint(GetContent());
if (aRenderComponents & eRenderFill) {
GeneralPattern fillPattern;
nsSVGUtils::MakeFillPatternFor(this, aContext, &fillPattern, aImgParams,
contextPaint);
if (fillPattern.GetPattern()) {
DrawOptions drawOptions(1.0f, CompositionOp::OP_OVER, aaMode);
if (simplePath.IsRect()) {
drawTarget->FillRect(simplePath.AsRect(), fillPattern, drawOptions);
} else if (path) {
drawTarget->Fill(path, fillPattern, drawOptions);
}
}
}
if ((aRenderComponents & eRenderStroke) &&
nsSVGUtils::HasStroke(this, contextPaint)) {
// Account for vector-effect:non-scaling-stroke:
gfxMatrix userToOuterSVG;
if (nsSVGUtils::GetNonScalingStrokeTransform(this, &userToOuterSVG)) {
// A simple Rect can't be transformed with rotate/skew, so let's switch
// to using a real path:
if (!path) {
path = element->GetOrBuildPath(*drawTarget, fillRule);
if (!path) {
return;
}
simplePath.Reset();
}
// We need to transform the path back into the appropriate ancestor
// coordinate system, and paint it it that coordinate system, in order
// for non-scaled stroke to paint correctly.
gfxMatrix outerSVGToUser = userToOuterSVG;
outerSVGToUser.Invert();
aContext->Multiply(outerSVGToUser);
RefPtr<PathBuilder> builder =
path->TransformedCopyToBuilder(ToMatrix(userToOuterSVG), fillRule);
path = builder->Finish();
}
GeneralPattern strokePattern;
nsSVGUtils::MakeStrokePatternFor(this, aContext, &strokePattern,
aImgParams, contextPaint);
if (strokePattern.GetPattern()) {
SVGContentUtils::AutoStrokeOptions strokeOptions;
SVGContentUtils::GetStrokeOptions(&strokeOptions,
static_cast<nsSVGElement*>(GetContent()),
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
SVGGeometryFrame::PaintMarkers(gfxContext& aContext,
const gfxMatrix& aTransform,
imgDrawingParams& aImgParams)
{
SVGContextPaint* contextPaint = SVGContextPaint::GetContextPaint(GetContent());
if (static_cast<SVGGeometryElement*>(GetContent())->IsMarkable()) {
MarkerProperties properties = GetMarkerProperties(this);
if (properties.MarkersExist()) {
float strokeWidth = nsSVGUtils::GetStrokeWidth(this, contextPaint);
nsTArray<nsSVGMark> marks;
static_cast<SVGGeometryElement*>
(GetContent())->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++) {
const nsSVGMark& mark = marks[i];
nsSVGMarkerFrame* frame = markerFrames[mark.type];
if (frame) {
frame->PaintMark(aContext, aTransform, this, mark, strokeWidth,
aImgParams);
}
}
}
}
}
}
uint16_t
SVGGeometryFrame::GetHitTestFlags()
{
return nsSVGUtils::GetGeometryHitTestFlags(this);
}
} // namespace mozilla
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