gecko-dev/layout/svg/nsSVGMaskFrame.h

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/* -*- 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 __NS_SVGMASKFRAME_H__
#define __NS_SVGMASKFRAME_H__
#include "mozilla/Attributes.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/RefPtr.h"
#include "gfxPattern.h"
#include "gfxMatrix.h"
#include "nsSVGContainerFrame.h"
#include "nsSVGUtils.h"
class gfxContext;
class nsSVGMaskFrame final : public nsSVGContainerFrame
{
friend nsIFrame*
NS_NewSVGMaskFrame(nsIPresShell* aPresShell, ComputedStyle* aStyle);
typedef mozilla::gfx::Matrix Matrix;
typedef mozilla::gfx::SourceSurface SourceSurface;
typedef mozilla::image::imgDrawingParams imgDrawingParams;
protected:
explicit nsSVGMaskFrame(ComputedStyle* aStyle)
: nsSVGContainerFrame(aStyle, kClassID)
, mInUse(false)
{
AddStateBits(NS_FRAME_IS_NONDISPLAY);
}
public:
NS_DECL_FRAMEARENA_HELPERS(nsSVGMaskFrame)
struct MaskParams {
gfxContext* ctx;
nsIFrame* maskedFrame;
const gfxMatrix& toUserSpace;
float opacity;
Matrix* maskTransform;
uint8_t maskMode;
imgDrawingParams& imgParams;
explicit MaskParams(gfxContext* aCtx, nsIFrame* aMaskedFrame,
const gfxMatrix& aToUserSpace, float aOpacity,
Matrix* aMaskTransform, uint8_t aMaskMode,
imgDrawingParams& aImgParams)
: ctx(aCtx), maskedFrame(aMaskedFrame), toUserSpace(aToUserSpace),
opacity(aOpacity), maskTransform(aMaskTransform), maskMode(aMaskMode),
imgParams(aImgParams)
{ }
};
// nsSVGMaskFrame method:
/**
* Generate a mask surface for the target frame.
*
* The return surface can be null, it's the caller's responsibility to
* null-check before dereferencing.
*/
already_AddRefed<SourceSurface>
GetMaskForMaskedFrame(MaskParams& aParams);
gfxRect
GetMaskArea(nsIFrame* aMaskedFrame);
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
nsAtom* aAttribute,
int32_t aModType) override;
#ifdef DEBUG
virtual void Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
#endif
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override {}
#ifdef DEBUG_FRAME_DUMP
virtual nsresult GetFrameName(nsAString& aResult) const override
{
return MakeFrameName(NS_LITERAL_STRING("SVGMask"), aResult);
}
#endif
private:
/**
* If the mask element transforms its children due to
* maskContentUnits="objectBoundingBox" being set on it, this function
* returns the resulting transform.
*/
gfxMatrix GetMaskTransform(nsIFrame* aMaskedFrame);
gfxMatrix mMatrixForChildren;
// recursion prevention flag
bool mInUse;
// nsSVGContainerFrame methods:
virtual gfxMatrix GetCanvasTM() override;
};
#endif