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146 lines
4.3 KiB
C++
146 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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 GFX_BASICLAYERSIMPL_H
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#define GFX_BASICLAYERSIMPL_H
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#include "BasicImplData.h" // for BasicImplData
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#include "BasicLayers.h" // for BasicLayerManager
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#include "ReadbackLayer.h" // for ReadbackLayer
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#include "gfxASurface.h" // for gfxASurface
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#include "gfxContext.h" // for gfxContext, etc
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#include "gfxMatrix.h" // for gfxMatrix
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#include "ipc/AutoOpenSurface.h" // for AutoOpenSurface
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#include "mozilla/Attributes.h" // for MOZ_DELETE, MOZ_STACK_CLASS
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#include "mozilla/Util.h" // for Maybe
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#include "mozilla/layers/LayersSurfaces.h" // for SurfaceDescriptor
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#include "nsAutoPtr.h" // for nsRefPtr
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#include "nsDebug.h" // for NS_ASSERTION
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#include "nsISupportsImpl.h" // for gfxContext::Release, etc
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#include "nsRegion.h" // for nsIntRegion
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#include "nsTraceRefcnt.h" // for MOZ_COUNT_CTOR, etc
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namespace mozilla {
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namespace layers {
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class BasicContainerLayer;
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class Layer;
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class AutoSetOperator {
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public:
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AutoSetOperator(gfxContext* aContext, gfxContext::GraphicsOperator aOperator) {
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if (aOperator != gfxContext::OPERATOR_OVER) {
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aContext->SetOperator(aOperator);
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mContext = aContext;
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}
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}
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~AutoSetOperator() {
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if (mContext) {
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mContext->SetOperator(gfxContext::OPERATOR_OVER);
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}
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}
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private:
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nsRefPtr<gfxContext> mContext;
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};
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class BasicReadbackLayer : public ReadbackLayer,
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public BasicImplData
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{
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public:
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BasicReadbackLayer(BasicLayerManager* aLayerManager) :
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ReadbackLayer(aLayerManager,
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static_cast<BasicImplData*>(MOZ_THIS_IN_INITIALIZER_LIST()))
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{
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MOZ_COUNT_CTOR(BasicReadbackLayer);
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}
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virtual ~BasicReadbackLayer()
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{
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MOZ_COUNT_DTOR(BasicReadbackLayer);
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}
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virtual void SetVisibleRegion(const nsIntRegion& aRegion)
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{
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NS_ASSERTION(BasicManager()->InConstruction(),
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"Can only set properties in construction phase");
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ReadbackLayer::SetVisibleRegion(aRegion);
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}
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protected:
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BasicLayerManager* BasicManager()
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{
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return static_cast<BasicLayerManager*>(mManager);
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}
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};
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/**
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* Drawing with a mask requires a mask surface and a transform.
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* Sometimes the mask surface is a direct gfxASurface, but other times
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* it's a SurfaceDescriptor. For SurfaceDescriptor, we need to use a
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* scoped AutoOpenSurface to get a gfxASurface for the
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* SurfaceDescriptor.
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*
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* This helper class manages the gfxASurface-or-SurfaceDescriptor
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* logic.
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*/
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class MOZ_STACK_CLASS AutoMaskData {
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public:
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AutoMaskData() { }
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~AutoMaskData() { }
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/**
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* Construct this out of either a gfxASurface or a
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* SurfaceDescriptor. Construct() must only be called once.
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* GetSurface() and GetTransform() must not be called until this has
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* been constructed.
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*/
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void Construct(const gfxMatrix& aTransform,
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gfxASurface* aSurface);
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void Construct(const gfxMatrix& aTransform,
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const SurfaceDescriptor& aSurface);
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/** The returned surface can't escape the scope of |this|. */
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gfxASurface* GetSurface();
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const gfxMatrix& GetTransform();
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private:
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bool IsConstructed();
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gfxMatrix mTransform;
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nsRefPtr<gfxASurface> mSurface;
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Maybe<AutoOpenSurface> mSurfaceOpener;
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AutoMaskData(const AutoMaskData&) MOZ_DELETE;
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AutoMaskData& operator=(const AutoMaskData&) MOZ_DELETE;
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};
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/*
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* Extract a mask surface for a mask layer
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* Returns true and through outparams a surface for the mask layer if
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* a mask layer is present and has a valid surface and transform;
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* false otherwise.
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* The transform for the layer will be put in aMaskData
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*/
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bool
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GetMaskData(Layer* aMaskLayer, AutoMaskData* aMaskData);
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// Paint the current source to a context using a mask, if present
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void
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PaintWithMask(gfxContext* aContext, float aOpacity, Layer* aMaskLayer);
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// Fill the current path with the current source, using a
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// mask and opacity, if present
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void
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FillWithMask(gfxContext* aContext, float aOpacity, Layer* aMaskLayer);
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BasicImplData*
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ToData(Layer* aLayer);
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}
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}
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#endif
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