зеркало из https://github.com/mozilla/gecko-dev.git
110 строки
3.2 KiB
C++
110 строки
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __NS_SVGMASKFRAME_H__
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#define __NS_SVGMASKFRAME_H__
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#include "mozilla/Attributes.h"
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#include "mozilla/gfx/2D.h"
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#include "mozilla/RefPtr.h"
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#include "gfxPattern.h"
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#include "gfxMatrix.h"
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#include "nsSVGContainerFrame.h"
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#include "nsSVGUtils.h"
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class gfxContext;
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class nsSVGMaskFrame final : public nsSVGContainerFrame
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{
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friend nsIFrame*
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NS_NewSVGMaskFrame(nsIPresShell* aPresShell, ComputedStyle* aStyle);
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typedef mozilla::gfx::Matrix Matrix;
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typedef mozilla::gfx::SourceSurface SourceSurface;
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typedef mozilla::image::imgDrawingParams imgDrawingParams;
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protected:
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explicit nsSVGMaskFrame(ComputedStyle* aStyle)
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: nsSVGContainerFrame(aStyle, kClassID)
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, mInUse(false)
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{
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AddStateBits(NS_FRAME_IS_NONDISPLAY);
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}
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public:
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NS_DECL_FRAMEARENA_HELPERS(nsSVGMaskFrame)
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struct MaskParams {
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gfxContext* ctx;
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nsIFrame* maskedFrame;
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const gfxMatrix& toUserSpace;
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float opacity;
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Matrix* maskTransform;
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uint8_t maskMode;
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imgDrawingParams& imgParams;
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explicit MaskParams(gfxContext* aCtx, nsIFrame* aMaskedFrame,
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const gfxMatrix& aToUserSpace, float aOpacity,
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Matrix* aMaskTransform, uint8_t aMaskMode,
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imgDrawingParams& aImgParams)
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: ctx(aCtx), maskedFrame(aMaskedFrame), toUserSpace(aToUserSpace),
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opacity(aOpacity), maskTransform(aMaskTransform), maskMode(aMaskMode),
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imgParams(aImgParams)
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{ }
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};
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// nsSVGMaskFrame method:
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/**
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* Generate a mask surface for the target frame.
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*
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* The return surface can be null, it's the caller's responsibility to
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* null-check before dereferencing.
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*/
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already_AddRefed<SourceSurface>
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GetMaskForMaskedFrame(MaskParams& aParams);
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gfxRect
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GetMaskArea(nsIFrame* aMaskedFrame);
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virtual nsresult AttributeChanged(int32_t aNameSpaceID,
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nsAtom* aAttribute,
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int32_t aModType) override;
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#ifdef DEBUG
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virtual void Init(nsIContent* aContent,
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nsContainerFrame* aParent,
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nsIFrame* aPrevInFlow) override;
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#endif
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virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override {}
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#ifdef DEBUG_FRAME_DUMP
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virtual nsresult GetFrameName(nsAString& aResult) const override
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{
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return MakeFrameName(NS_LITERAL_STRING("SVGMask"), aResult);
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}
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#endif
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private:
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/**
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* If the mask element transforms its children due to
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* maskContentUnits="objectBoundingBox" being set on it, this function
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* returns the resulting transform.
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*/
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gfxMatrix GetMaskTransform(nsIFrame* aMaskedFrame);
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gfxMatrix mMatrixForChildren;
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// recursion prevention flag
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bool mInUse;
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// nsSVGContainerFrame methods:
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virtual gfxMatrix GetCanvasTM() override;
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};
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#endif
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