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d85d3ab378
gecko-dev/layout/svg/SVGGeometryFrame.cpp
cku d85d3ab378 Bug 1351440 - Part 2. Encapsulate DrawResult and imgIContainer::FLAG_* into imgDrawingParams, and pass it to PaintSVG. r=jwatt 
The DrawResult return was not in fact anything to do with the success or
failure of that method, but was actually passing out a very specific piece of information
about the success or failure of any imagelib drawing that may not have occurred
under the various PaintSVG calls.

The signature of PaintSVG is changed from
  DrawResult PaintSVG(...., uint32 flags);
to
  void PaintSVG(...., imgDrawingParams& aPackage);

imgDrawingParams wraps DrawResult and imgIContainer::FLAG_* as a pack, pass through
PaintSVG to imagelib draw calls under beneath.

MozReview-Commit-ID: IOq2evUAOQF
2017-05-18 22:03:41 +02:00

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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 "nsRenderingContext.h"
#include "nsSVGEffects.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,
nsRenderingContext* aCtx) override;
nsDisplayItemGeometry* AllocateGeometry(nsDisplayListBuilder* aBuilder) override
{
return new nsDisplayItemGenericImageGeometry(this, aBuilder);
}
void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion *aInvalidRegion) 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,
nsRenderingContext* 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->ThebesContext(),
tm, imgParams);
nsDisplayItemGenericImageGeometry::UpdateDrawResult(this, imgParams.result);
}
void
nsDisplaySVGGeometry::ComputeInvalidationRegion(
nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion* aInvalidRegion)
{
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,
nsIAtom* 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*>
(mContent)->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) {
auto oldStyleEffects = aOldStyleContext->PeekStyleEffects();
if (oldStyleEffects &&
StyleEffects()->mOpacity != oldStyleEffects->mOpacity &&
nsSVGUtils::CanOptimizeOpacity(this)) {
// nsIFrame::BuildDisplayListForStackingContext() is not going to create an
// nsDisplayOpacity display list item, so DLBI won't invalidate for us.
InvalidateFrame();
}
SVGGeometryElement* element =
static_cast<SVGGeometryElement*>(mContent);
auto oldStyleSVG = aOldStyleContext->PeekStyleSVG();
if (oldStyleSVG && !SVGContentUtils::ShapeTypeHasNoCorners(mContent)) {
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*>(mContent);
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 nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
if (!static_cast<const nsSVGElement*>(mContent)->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*>(mContent);
// 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):
nsSVGEffects::UpdateEffects(this);
}
nsRect overflow = nsRect(nsPoint(0,0), mRect.Size());
nsOverflowAreas overflowAreas(overflow, overflow);
FinishAndStoreOverflow(overflowAreas, mRect.Size());
mState &= ~(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*>(mContent)->GeometryDependsOnCoordCtx() ||
StyleSVG()->mStrokeWidth.HasPercent()) {
static_cast<SVGGeometryElement*>(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
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*>(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 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*>(mContent)->IsMarkable()) {
float strokeWidth = nsSVGUtils::GetStrokeWidth(this);
MarkerProperties properties = GetMarkerProperties(this);
if (properties.MarkersExist()) {
nsTArray<nsSVGMark> marks;
static_cast<SVGGeometryElement*>(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;
}
//----------------------------------------------------------------------
// SVGGeometryFrame methods:
gfxMatrix
SVGGeometryFrame::GetCanvasTM()
{
NS_ASSERTION(GetParent(), "null parent");
nsSVGContainerFrame *parent = static_cast<nsSVGContainerFrame*>(GetParent());
SVGGraphicsElement *content = static_cast<SVGGraphicsElement*>(mContent);
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 =
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 *
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*>(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;
}
SVGGeometryElement::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, 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*>(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
SVGGeometryFrame::PaintMarkers(gfxContext& aContext,
const gfxMatrix& aTransform,
imgDrawingParams& aImgParams)
{
SVGContextPaint* contextPaint = SVGContextPaint::GetContextPaint(mContent);
if (static_cast<SVGGeometryElement*>(mContent)->IsMarkable()) {
MarkerProperties properties = GetMarkerProperties(this);
if (properties.MarkersExist()) {
float strokeWidth = nsSVGUtils::GetStrokeWidth(this, contextPaint);
nsTArray<nsSVGMark> marks;
static_cast<SVGGeometryElement*>
(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,
aImgParams);
}
}
}
}
}
}
uint16_t
SVGGeometryFrame::GetHitTestFlags()
{
return nsSVGUtils::GetGeometryHitTestFlags(this);
}
} // namespace mozilla
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