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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 MOZILLA_LAYERS_KNOWSCOMPOSITOR
#define MOZILLA_LAYERS_KNOWSCOMPOSITOR
#include "mozilla/layers/LayersTypes.h" // for LayersBackend
#include "mozilla/layers/CompositorTypes.h"
namespace mozilla {
namespace layers {
class SyncObject;
class TextureForwarder;
class LayersIPCActor;
/**
* An abstract interface for classes that are tied to a specific Compositor across
* IPDL and uses TextureFactoryIdentifier to describe this Compositor.
*/
class KnowsCompositor {
public:
NS_IMETHOD_(MozExternalRefCountType) AddRef(void) = 0;
NS_IMETHOD_(MozExternalRefCountType) Release(void) = 0;
KnowsCompositor();
~KnowsCompositor();
void IdentifyTextureHost(const TextureFactoryIdentifier& aIdentifier);
SyncObject* GetSyncObject() { return mSyncObject; }
int32_t GetMaxTextureSize() const
{
return mTextureFactoryIdentifier.mMaxTextureSize;
}
/**
* Returns the type of backend that is used off the main thread.
* We only don't allow changing the backend type at runtime so this value can
* be queried once and will not change until Gecko is restarted.
*/
LayersBackend GetCompositorBackendType() const
{
return mTextureFactoryIdentifier.mParentBackend;
}
bool SupportsTextureBlitting() const
{
return mTextureFactoryIdentifier.mSupportsTextureBlitting;
}
bool SupportsPartialUploads() const
{
return mTextureFactoryIdentifier.mSupportsPartialUploads;
}
bool SupportsComponentAlpha() const
{
return mTextureFactoryIdentifier.mSupportsComponentAlpha;
}
const TextureFactoryIdentifier& GetTextureFactoryIdentifier() const
{
return mTextureFactoryIdentifier;
}
int32_t GetSerial() { return mSerial; }
/**
* Helpers for finding other related interface. These are infallible.
*/
virtual TextureForwarder* GetTextureForwarder() = 0;
virtual LayersIPCActor* GetLayersIPCActor() = 0;
protected:
TextureFactoryIdentifier mTextureFactoryIdentifier;
RefPtr<SyncObject> mSyncObject;
const int32_t mSerial;
static mozilla::Atomic<int32_t> sSerialCounter;
};
} // namespace layers
} // namespace mozilla
#endif
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