gecko/gfx/layers/basic/BasicThebesLayer.h

210 lines
6.7 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 GFX_BASICTHEBESLAYER_H
#define GFX_BASICTHEBESLAYER_H
#include "mozilla/layers/PLayersParent.h"
#include "BasicBuffers.h"
namespace mozilla {
namespace layers {
class BasicThebesLayer : public ThebesLayer, public BasicImplData {
public:
typedef BasicThebesLayerBuffer Buffer;
BasicThebesLayer(BasicLayerManager* aLayerManager) :
ThebesLayer(aLayerManager, static_cast<BasicImplData*>(this)),
mBuffer(this)
{
MOZ_COUNT_CTOR(BasicThebesLayer);
}
virtual ~BasicThebesLayer()
{
MOZ_COUNT_DTOR(BasicThebesLayer);
}
virtual void SetVisibleRegion(const nsIntRegion& aRegion)
{
NS_ASSERTION(BasicManager()->InConstruction(),
"Can only set properties in construction phase");
ThebesLayer::SetVisibleRegion(aRegion);
}
virtual void InvalidateRegion(const nsIntRegion& aRegion)
{
NS_ASSERTION(BasicManager()->InConstruction(),
"Can only set properties in construction phase");
mInvalidRegion.Or(mInvalidRegion, aRegion);
mInvalidRegion.SimplifyOutward(10);
mValidRegion.Sub(mValidRegion, mInvalidRegion);
}
virtual void PaintThebes(gfxContext* aContext,
Layer* aMaskLayer,
LayerManager::DrawThebesLayerCallback aCallback,
void* aCallbackData,
ReadbackProcessor* aReadback);
virtual void ClearCachedResources() { mBuffer.Clear(); mValidRegion.SetEmpty(); }
virtual already_AddRefed<gfxASurface>
CreateBuffer(Buffer::ContentType aType, const nsIntSize& aSize);
virtual void ComputeEffectiveTransforms(const gfx3DMatrix& aTransformToSurface)
{
if (!BasicManager()->IsRetained()) {
// Don't do any snapping of our transform, since we're just going to
// draw straight through without intermediate buffers.
mEffectiveTransform = GetLocalTransform()*aTransformToSurface;
if (gfxPoint(0,0) != mResidualTranslation) {
mResidualTranslation = gfxPoint(0,0);
mValidRegion.SetEmpty();
}
ComputeEffectiveTransformForMaskLayer(aTransformToSurface);
return;
}
ThebesLayer::ComputeEffectiveTransforms(aTransformToSurface);
}
// Sync front/back buffers content
virtual void SyncFrontBufferToBackBuffer() {}
protected:
BasicLayerManager* BasicManager()
{
return static_cast<BasicLayerManager*>(mManager);
}
virtual void
PaintBuffer(gfxContext* aContext,
const nsIntRegion& aRegionToDraw,
const nsIntRegion& aExtendedRegionToDraw,
const nsIntRegion& aRegionToInvalidate,
bool aDidSelfCopy,
LayerManager::DrawThebesLayerCallback aCallback,
void* aCallbackData)
{
if (!aCallback) {
BasicManager()->SetTransactionIncomplete();
return;
}
aCallback(this, aContext, aExtendedRegionToDraw, aRegionToInvalidate,
aCallbackData);
// Everything that's visible has been validated. Do this instead of just
// OR-ing with aRegionToDraw, since that can lead to a very complex region
// here (OR doesn't automatically simplify to the simplest possible
// representation of a region.)
nsIntRegion tmp;
tmp.Or(mVisibleRegion, aExtendedRegionToDraw);
mValidRegion.Or(mValidRegion, tmp);
}
Buffer mBuffer;
};
struct AutoBufferTracker;
class BasicShadowableThebesLayer : public BasicThebesLayer,
public BasicShadowableLayer
{
friend struct AutoBufferTracker;
typedef BasicThebesLayer Base;
public:
BasicShadowableThebesLayer(BasicShadowLayerManager* aManager)
: BasicThebesLayer(aManager)
, mBufferTracker(nullptr)
, mIsNewBuffer(false)
, mFrontAndBackBufferDiffer(false)
{
MOZ_COUNT_CTOR(BasicShadowableThebesLayer);
}
virtual ~BasicShadowableThebesLayer();
virtual void PaintThebes(gfxContext* aContext,
Layer* aMaskLayer,
LayerManager::DrawThebesLayerCallback aCallback,
void* aCallbackData,
ReadbackProcessor* aReadback);
virtual void ClearCachedResources() MOZ_OVERRIDE
{
BasicThebesLayer::ClearCachedResources();
DestroyBackBuffer();
// Don't try to read back from this, it soon may be invalid.
mROFrontBuffer = null_t();
mFrontAndBackBufferDiffer = false;
}
virtual void FillSpecificAttributes(SpecificLayerAttributes& aAttrs)
{
aAttrs = ThebesLayerAttributes(GetValidRegion());
}
virtual Layer* AsLayer() { return this; }
virtual ShadowableLayer* AsShadowableLayer() { return this; }
void SetBackBufferAndAttrs(const OptionalThebesBuffer& aBuffer,
const nsIntRegion& aValidRegion,
const OptionalThebesBuffer& aReadOnlyFrontBuffer,
const nsIntRegion& aFrontUpdatedRegion);
virtual void Disconnect();
virtual BasicShadowableThebesLayer* AsThebes() { return this; }
virtual void SyncFrontBufferToBackBuffer();
private:
BasicShadowLayerManager* BasicManager()
{
return static_cast<BasicShadowLayerManager*>(mManager);
}
virtual void
PaintBuffer(gfxContext* aContext,
const nsIntRegion& aRegionToDraw,
const nsIntRegion& aExtendedRegionToDraw,
const nsIntRegion& aRegionToInvalidate,
bool aDidSelfCopy,
LayerManager::DrawThebesLayerCallback aCallback,
void* aCallbackData) MOZ_OVERRIDE;
virtual already_AddRefed<gfxASurface>
CreateBuffer(Buffer::ContentType aType, const nsIntSize& aSize) MOZ_OVERRIDE;
void DestroyBackBuffer()
{
if (IsSurfaceDescriptorValid(mBackBuffer)) {
BasicManager()->ShadowLayerForwarder::DestroySharedSurface(&mBackBuffer);
}
}
// This describes the gfxASurface we hand to mBuffer. We keep a
// copy of the descriptor here so that we can call
// DestroySharedSurface() on the descriptor.
SurfaceDescriptor mBackBuffer;
nsIntRect mBackBufferRect;
nsIntPoint mBackBufferRectRotation;
// This helper object lives on the stack during its lifetime and
// keeps track of buffers we might have mapped and/or allocated.
// When it goes out of scope on the stack, it unmaps whichever
// buffers have been mapped (if any).
AutoBufferTracker* mBufferTracker;
bool mIsNewBuffer;
OptionalThebesBuffer mROFrontBuffer;
nsIntRegion mFrontUpdatedRegion;
bool mFrontAndBackBufferDiffer;
};
}
}
#endif