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Issue #2737 - Part 1: Base implementation of SVGGeometryElement.

Browse source 
Mostly mechanical changes to generalize path geometry for all SVG draw
elements. No user-exposed changes.
This commit is contained in:
Moonchild 2025-04-27 18:03:48 +02:00 • committed by roytam1
commit fd4a224d1d
45 changed files with 368 additions and 319 deletions
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132
dom/svg/nsSVGPathGeometryElement.cpp
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@ -1,132 +0,0 @@
/* -*- Mode: C++; tab-width: 8; 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/. */
#include "nsSVGPathGeometryElement.h"
#include "gfxPlatform.h"
#include "mozilla/gfx/2D.h"
#include "nsComputedDOMStyle.h"
#include "nsSVGUtils.h"
#include "nsSVGLength2.h"
#include "SVGContentUtils.h"
using namespace mozilla;
using namespace mozilla::gfx;
//----------------------------------------------------------------------
// Implementation
nsSVGPathGeometryElement::nsSVGPathGeometryElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
: nsSVGPathGeometryElementBase(aNodeInfo)
{
}
nsresult
nsSVGPathGeometryElement::AfterSetAttr(int32_t aNamespaceID, nsIAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue, bool aNotify)
{
if (mCachedPath &&
aNamespaceID == kNameSpaceID_None &&
AttributeDefinesGeometry(aName)) {
mCachedPath = nullptr;
}
return nsSVGPathGeometryElementBase::AfterSetAttr(aNamespaceID, aName,
aValue, aOldValue, aNotify);
}
bool
nsSVGPathGeometryElement::AttributeDefinesGeometry(const nsIAtom *aName)
{
// Check for nsSVGLength2 attribute
LengthAttributesInfo info = GetLengthInfo();
for (uint32_t i = 0; i < info.mLengthCount; i++) {
if (aName == *info.mLengthInfo[i].mName) {
return true;
}
}
return false;
}
bool
nsSVGPathGeometryElement::GeometryDependsOnCoordCtx()
{
// Check the nsSVGLength2 attribute
LengthAttributesInfo info = const_cast<nsSVGPathGeometryElement*>(this)->GetLengthInfo();
for (uint32_t i = 0; i < info.mLengthCount; i++) {
if (info.mLengths[i].GetSpecifiedUnitType() == nsIDOMSVGLength::SVG_LENGTHTYPE_PERCENTAGE) {
return true;
}
}
return false;
}
bool
nsSVGPathGeometryElement::IsMarkable()
{
return false;
}
void
nsSVGPathGeometryElement::GetMarkPoints(nsTArray<nsSVGMark> *aMarks)
{
}
already_AddRefed<Path>
nsSVGPathGeometryElement::GetOrBuildPath(const DrawTarget& aDrawTarget,
FillRule aFillRule)
{
// We only cache the path if it matches the backend used for screen painting:
bool cacheable = aDrawTarget.GetBackendType() ==
gfxPlatform::GetPlatform()->GetDefaultContentBackend();
// Checking for and returning mCachedPath before checking the pref means
// that the pref is only live on page reload (or app restart for SVG in
// chrome). The benefit is that we avoid causing a CPU memory cache miss by
// looking at the global variable that the pref's stored in.
if (cacheable && mCachedPath) {
if (aDrawTarget.GetBackendType() == mCachedPath->GetBackendType()) {
RefPtr<Path> path(mCachedPath);
return path.forget();
}
}
RefPtr<PathBuilder> builder = aDrawTarget.CreatePathBuilder(aFillRule);
RefPtr<Path> path = BuildPath(builder);
if (cacheable && NS_SVGPathCachingEnabled()) {
mCachedPath = path;
}
return path.forget();
}
already_AddRefed<Path>
nsSVGPathGeometryElement::GetOrBuildPathForMeasuring()
{
return nullptr;
}
FillRule
nsSVGPathGeometryElement::GetFillRule()
{
FillRule fillRule = FillRule::FILL_WINDING; // Equivalent to StyleFillRule::Nonzero
RefPtr<nsStyleContext> styleContext =
nsComputedDOMStyle::GetStyleContextForElementNoFlush(this, nullptr,
nullptr);
if (styleContext) {
MOZ_ASSERT(styleContext->StyleSVG()->mFillRule == StyleFillRule::Nonzero ||
styleContext->StyleSVG()->mFillRule == StyleFillRule::Evenodd);
if (styleContext->StyleSVG()->mFillRule == StyleFillRule::Evenodd) {
fillRule = FillRule::FILL_EVEN_ODD;
}
} else {
// ReportToConsole
NS_WARNING("Couldn't get style context for content in GetFillRule");
}
return fillRule;
}