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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /layout/svg/nsSVGMaskFrame.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'layout/svg/nsSVGMaskFrame.h')
-rw-r--r--layout/svg/nsSVGMaskFrame.h131
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diff --git a/layout/svg/nsSVGMaskFrame.h b/layout/svg/nsSVGMaskFrame.h
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+/* -*- 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 "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;
+
+protected:
+ explicit nsSVGMaskFrame(nsStyleContext* aContext)
+ : nsSVGContainerFrame(aContext)
+ , mInUse(false)
+ {
+ AddStateBits(NS_FRAME_IS_NONDISPLAY);
+ }
+
+public:
+ NS_DECL_FRAMEARENA_HELPERS
+
+ // nsSVGMaskFrame method:
+ already_AddRefed<SourceSurface>
+ GetMaskForMaskedFrame(gfxContext* aContext,
+ nsIFrame* aMaskedFrame,
+ const gfxMatrix &aMatrix,
+ float aOpacity,
+ Matrix* aMaskTransform,
+ uint8_t aMaskOp = NS_STYLE_MASK_MODE_MATCH_SOURCE);
+
+ 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