gecko-dev/dom/svg/SVGFEBlendElement.h
Kirk Steuber 7fdb378650 Bug 1359556 - Optimize cloneNode by preinitializing attribute and child arrays r=bz
Currently, attribute and child arrays (implemented in dom/base/nsAttrAndChildArray.h) start out empty. When cloning, the array ends up being resized multiple times in order to add the attributes and children that are being cloned from the original node. This would be quicker if the array was initialized to the correct size in the first place so that resizes are not necessary.

However, preallocating space for children is only necessary when performing a deep clone. Therefore, an additional parameter is being added to the Clone, CopyInnerTo, and CloneDocHelper methods to indicate whether preallocation of children should happen. Attributes are copied either way, so that part of the array is preallocated in both cases.

MozReview-Commit-ID: 3iVezeAKXnI

--HG--
extra : rebase_source : 9c3deec6d7aafd6411044d623d4863637b45fd58
2017-04-20 12:57:48 -07:00

69 lines
2.4 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef mozilla_dom_SVGFEBlendElement_h
#define mozilla_dom_SVGFEBlendElement_h
#include "nsSVGFilters.h"
#include "nsSVGEnum.h"
nsresult NS_NewSVGFEBlendElement(nsIContent **aResult,
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
namespace mozilla {
namespace dom {
typedef nsSVGFE SVGFEBlendElementBase;
class SVGFEBlendElement : public SVGFEBlendElementBase
{
friend nsresult (::NS_NewSVGFEBlendElement(nsIContent **aResult,
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo));
protected:
explicit SVGFEBlendElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
: SVGFEBlendElementBase(aNodeInfo)
{
}
virtual JSObject* WrapNode(JSContext *cx, JS::Handle<JSObject*> aGivenProto) override;
public:
virtual FilterPrimitiveDescription
GetPrimitiveDescription(nsSVGFilterInstance* aInstance,
const IntRect& aFilterSubregion,
const nsTArray<bool>& aInputsAreTainted,
nsTArray<RefPtr<SourceSurface>>& aInputImages) override;
virtual bool AttributeAffectsRendering(
int32_t aNameSpaceID, nsIAtom* aAttribute) const override;
virtual nsSVGString& GetResultImageName() override { return mStringAttributes[RESULT]; }
virtual void GetSourceImageNames(nsTArray<nsSVGStringInfo>& aSources) override;
virtual nsresult Clone(mozilla::dom::NodeInfo *aNodeInfo, nsINode **aResult,
bool aPreallocateChildren) const override;
// WebIDL
already_AddRefed<SVGAnimatedString> In1();
already_AddRefed<SVGAnimatedString> In2();
already_AddRefed<SVGAnimatedEnumeration> Mode();
protected:
virtual EnumAttributesInfo GetEnumInfo() override;
virtual StringAttributesInfo GetStringInfo() override;
enum { MODE };
nsSVGEnum mEnumAttributes[1];
static nsSVGEnumMapping sModeMap[];
static EnumInfo sEnumInfo[1];
enum { RESULT, IN1, IN2 };
nsSVGString mStringAttributes[3];
static StringInfo sStringInfo[3];
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_SVGFEBlendElement_h