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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 LAYOUT_SVG_SVGMASKFRAME_H_
#define LAYOUT_SVG_SVGMASKFRAME_H_
#include "mozilla/Attributes.h"
#include "mozilla/RefPtr.h"
#include "mozilla/SVGContainerFrame.h"
#include "mozilla/gfx/2D.h"
#include "gfxPattern.h"
#include "gfxMatrix.h"
class gfxContext;
namespace mozilla {
class PresShell;
} // namespace mozilla
nsIFrame* NS_NewSVGMaskFrame(mozilla::PresShell* aPresShell,
mozilla::ComputedStyle* aStyle);
namespace mozilla {
class SVGMaskFrame final : public SVGContainerFrame {
friend nsIFrame* ::NS_NewSVGMaskFrame(mozilla::PresShell* aPresShell,
ComputedStyle* aStyle);
using Matrix = gfx::Matrix;
using SourceSurface = gfx::SourceSurface;
using imgDrawingParams = image::imgDrawingParams;
protected:
explicit SVGMaskFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
: SVGContainerFrame(aStyle, aPresContext, kClassID), mInUse(false) {
AddStateBits(NS_FRAME_IS_NONDISPLAY);
}
public:
NS_DECL_FRAMEARENA_HELPERS(SVGMaskFrame)
struct MaskParams {
gfx::DrawTarget* dt;
nsIFrame* maskedFrame;
const gfxMatrix& toUserSpace;
float opacity;
StyleMaskMode maskMode;
imgDrawingParams& imgParams;
explicit MaskParams(gfx::DrawTarget* aDt, nsIFrame* aMaskedFrame,
const gfxMatrix& aToUserSpace, float aOpacity,
StyleMaskMode aMaskMode, imgDrawingParams& aImgParams)
: dt(aDt),
maskedFrame(aMaskedFrame),
toUserSpace(aToUserSpace),
opacity(aOpacity),
maskMode(aMaskMode),
imgParams(aImgParams) {}
};
// SVGMaskFrame 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(u"SVGMask"_ns, 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;
// SVGContainerFrame methods:
virtual gfxMatrix GetCanvasTM() override;
};
} // namespace mozilla
#endif // LAYOUT_SVG_SVGMASKFRAME_H_