зеркало из https://github.com/mozilla/gecko-dev.git
145 строки
4.1 KiB
C++
145 строки
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* 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 "mozilla/Pair.h"
|
|
#include "gfxPattern.h"
|
|
#include "gfxMatrix.h"
|
|
#include "nsSVGContainerFrame.h"
|
|
#include "nsSVGUtils.h"
|
|
|
|
class gfxContext;
|
|
|
|
/**
|
|
* Byte offsets of channels in a native packed gfxColor or cairo image surface.
|
|
*/
|
|
#ifdef IS_BIG_ENDIAN
|
|
#define GFX_ARGB32_OFFSET_A 0
|
|
#define GFX_ARGB32_OFFSET_R 1
|
|
#define GFX_ARGB32_OFFSET_G 2
|
|
#define GFX_ARGB32_OFFSET_B 3
|
|
#else
|
|
#define GFX_ARGB32_OFFSET_A 3
|
|
#define GFX_ARGB32_OFFSET_R 2
|
|
#define GFX_ARGB32_OFFSET_G 1
|
|
#define GFX_ARGB32_OFFSET_B 0
|
|
#endif
|
|
|
|
class nsSVGMaskFrame final : public nsSVGContainerFrame
|
|
{
|
|
friend nsIFrame*
|
|
NS_NewSVGMaskFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
|
|
|
|
typedef mozilla::gfx::Matrix Matrix;
|
|
typedef mozilla::gfx::SourceSurface SourceSurface;
|
|
typedef mozilla::image::DrawResult DrawResult;
|
|
|
|
protected:
|
|
explicit nsSVGMaskFrame(nsStyleContext* aContext)
|
|
: nsSVGContainerFrame(aContext)
|
|
, mInUse(false)
|
|
{
|
|
AddStateBits(NS_FRAME_IS_NONDISPLAY);
|
|
}
|
|
|
|
public:
|
|
NS_DECL_FRAMEARENA_HELPERS
|
|
|
|
struct MaskParams {
|
|
gfxContext* ctx;
|
|
nsIFrame* maskedFrame;
|
|
const gfxMatrix& toUserSpace;
|
|
float opacity;
|
|
Matrix* maskTransform;
|
|
uint8_t maskMode;
|
|
|
|
explicit MaskParams(gfxContext* aCtx, nsIFrame* aMaskedFrame,
|
|
const gfxMatrix& aToUserSpace, float aOpacity,
|
|
Matrix* aMaskTransform, uint8_t aMaskMode)
|
|
: ctx(aCtx), maskedFrame(aMaskedFrame), toUserSpace(aToUserSpace),
|
|
opacity(aOpacity), maskTransform(aMaskTransform), maskMode(aMaskMode)
|
|
{ }
|
|
};
|
|
|
|
// nsSVGMaskFrame method:
|
|
mozilla::Pair<DrawResult, RefPtr<SourceSurface>>
|
|
GetMaskForMaskedFrame(MaskParams& aParams);
|
|
|
|
gfxRect
|
|
GetMaskArea(nsIFrame* aMaskedFrame);
|
|
|
|
virtual nsresult AttributeChanged(int32_t aNameSpaceID,
|
|
nsIAtom* aAttribute,
|
|
int32_t aModType) override;
|
|
|
|
#ifdef DEBUG
|
|
virtual void Init(nsIContent* aContent,
|
|
nsContainerFrame* aParent,
|
|
nsIFrame* aPrevInFlow) override;
|
|
#endif
|
|
|
|
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
|
|
const nsRect& aDirtyRect,
|
|
const nsDisplayListSet& aLists) override {}
|
|
|
|
/**
|
|
* Get the "type" of the frame
|
|
*
|
|
* @see nsGkAtoms::svgMaskFrame
|
|
*/
|
|
virtual nsIAtom* GetType() const 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);
|
|
|
|
// A helper class to allow us to paint masks safely. The helper
|
|
// automatically sets and clears the mInUse flag on the mask frame
|
|
// (to prevent nasty reference loops). It's easy to mess this up
|
|
// and break things, so this helper makes the code far more robust.
|
|
class MOZ_RAII AutoMaskReferencer
|
|
{
|
|
public:
|
|
explicit AutoMaskReferencer(nsSVGMaskFrame *aFrame
|
|
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
: mFrame(aFrame) {
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
NS_ASSERTION(!mFrame->mInUse, "reference loop!");
|
|
mFrame->mInUse = true;
|
|
}
|
|
~AutoMaskReferencer() {
|
|
mFrame->mInUse = false;
|
|
}
|
|
private:
|
|
nsSVGMaskFrame *mFrame;
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
};
|
|
|
|
gfxMatrix mMatrixForChildren;
|
|
// recursion prevention flag
|
|
bool mInUse;
|
|
|
|
// nsSVGContainerFrame methods:
|
|
virtual gfxMatrix GetCanvasTM() override;
|
|
};
|
|
|
|
#endif
|