1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/svg/nsSVGMaskFrame.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,102 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef __NS_SVGMASKFRAME_H__
1.10 +#define __NS_SVGMASKFRAME_H__
1.11 +
1.12 +#include "mozilla/Attributes.h"
1.13 +#include "gfxPattern.h"
1.14 +#include "gfxMatrix.h"
1.15 +#include "nsSVGContainerFrame.h"
1.16 +#include "nsSVGUtils.h"
1.17 +
1.18 +class gfxContext;
1.19 +class nsRenderingContext;
1.20 +
1.21 +typedef nsSVGContainerFrame nsSVGMaskFrameBase;
1.22 +
1.23 +class nsSVGMaskFrame : public nsSVGMaskFrameBase
1.24 +{
1.25 + friend nsIFrame*
1.26 + NS_NewSVGMaskFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
1.27 +protected:
1.28 + nsSVGMaskFrame(nsStyleContext* aContext)
1.29 + : nsSVGMaskFrameBase(aContext)
1.30 + , mInUse(false)
1.31 + {
1.32 + AddStateBits(NS_FRAME_IS_NONDISPLAY);
1.33 + }
1.34 +
1.35 +public:
1.36 + NS_DECL_FRAMEARENA_HELPERS
1.37 +
1.38 + // nsSVGMaskFrame method:
1.39 + already_AddRefed<gfxPattern> ComputeMaskAlpha(nsRenderingContext *aContext,
1.40 + nsIFrame* aParent,
1.41 + const gfxMatrix &aMatrix,
1.42 + float aOpacity = 1.0f);
1.43 +
1.44 + virtual nsresult AttributeChanged(int32_t aNameSpaceID,
1.45 + nsIAtom* aAttribute,
1.46 + int32_t aModType) MOZ_OVERRIDE;
1.47 +
1.48 +#ifdef DEBUG
1.49 + virtual void Init(nsIContent* aContent,
1.50 + nsIFrame* aParent,
1.51 + nsIFrame* aPrevInFlow) MOZ_OVERRIDE;
1.52 +#endif
1.53 +
1.54 + virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
1.55 + const nsRect& aDirtyRect,
1.56 + const nsDisplayListSet& aLists) MOZ_OVERRIDE {}
1.57 +
1.58 + /**
1.59 + * Get the "type" of the frame
1.60 + *
1.61 + * @see nsGkAtoms::svgMaskFrame
1.62 + */
1.63 + virtual nsIAtom* GetType() const MOZ_OVERRIDE;
1.64 +
1.65 +#ifdef DEBUG_FRAME_DUMP
1.66 + virtual nsresult GetFrameName(nsAString& aResult) const MOZ_OVERRIDE
1.67 + {
1.68 + return MakeFrameName(NS_LITERAL_STRING("SVGMask"), aResult);
1.69 + }
1.70 +#endif
1.71 +
1.72 +private:
1.73 + // A helper class to allow us to paint masks safely. The helper
1.74 + // automatically sets and clears the mInUse flag on the mask frame
1.75 + // (to prevent nasty reference loops). It's easy to mess this up
1.76 + // and break things, so this helper makes the code far more robust.
1.77 + class MOZ_STACK_CLASS AutoMaskReferencer
1.78 + {
1.79 + public:
1.80 + AutoMaskReferencer(nsSVGMaskFrame *aFrame
1.81 + MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
1.82 + : mFrame(aFrame) {
1.83 + MOZ_GUARD_OBJECT_NOTIFIER_INIT;
1.84 + NS_ASSERTION(!mFrame->mInUse, "reference loop!");
1.85 + mFrame->mInUse = true;
1.86 + }
1.87 + ~AutoMaskReferencer() {
1.88 + mFrame->mInUse = false;
1.89 + }
1.90 + private:
1.91 + nsSVGMaskFrame *mFrame;
1.92 + MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
1.93 + };
1.94 +
1.95 + nsIFrame *mMaskParent;
1.96 + nsAutoPtr<gfxMatrix> mMaskParentMatrix;
1.97 + // recursion prevention flag
1.98 + bool mInUse;
1.99 +
1.100 + // nsSVGContainerFrame methods:
1.101 + virtual gfxMatrix GetCanvasTM(uint32_t aFor,
1.102 + nsIFrame* aTransformRoot = nullptr) MOZ_OVERRIDE;
1.103 +};
1.104 +
1.105 +#endif
