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110 lines
3.5 KiB
C++
110 lines
3.5 KiB
C++
/* -*- Mode: C++; tab-width: 20; 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 MOZILLA_GFX_TEXTURECLIENT_RECYCLE_ALLOCATOR_H
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#define MOZILLA_GFX_TEXTURECLIENT_RECYCLE_ALLOCATOR_H
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#include <map>
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#include <stack>
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#include "mozilla/gfx/Types.h"
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#include "mozilla/RefPtr.h"
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#include "TextureClient.h"
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#include "mozilla/Mutex.h"
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namespace mozilla {
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namespace layers {
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class TextureClientHolder;
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class ITextureClientAllocationHelper
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{
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public:
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ITextureClientAllocationHelper(gfx::SurfaceFormat aFormat,
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gfx::IntSize aSize,
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BackendSelector aSelector,
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TextureFlags aTextureFlags,
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TextureAllocationFlags aAllocationFlags)
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: mFormat(aFormat)
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, mSize(aSize)
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, mSelector(aSelector)
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, mTextureFlags(aTextureFlags | TextureFlags::RECYCLE) // Set recycle flag
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, mAllocationFlags(aAllocationFlags)
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{}
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virtual already_AddRefed<TextureClient> Allocate(CompositableForwarder* aAllocator) = 0;
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virtual bool IsCompatible(TextureClient* aTextureClient) = 0;
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const gfx::SurfaceFormat mFormat;
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const gfx::IntSize mSize;
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const BackendSelector mSelector;
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const TextureFlags mTextureFlags;
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const TextureAllocationFlags mAllocationFlags;
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};
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/**
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* TextureClientRecycleAllocator provides TextureClients allocation and
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* recycling capabilities. It expects allocations of same sizes and
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* attributres. If a recycled TextureClient is different from
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* requested one, the recycled one is dropped and new TextureClient is allocated.
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*
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* By default this uses TextureClient::CreateForDrawing to allocate new texture
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* clients.
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*/
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class TextureClientRecycleAllocator
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{
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protected:
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virtual ~TextureClientRecycleAllocator();
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(TextureClientRecycleAllocator)
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explicit TextureClientRecycleAllocator(CompositableForwarder* aAllocator);
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void SetMaxPoolSize(uint32_t aMax);
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// Creates and allocates a TextureClient.
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already_AddRefed<TextureClient>
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CreateOrRecycle(gfx::SurfaceFormat aFormat,
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gfx::IntSize aSize,
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BackendSelector aSelector,
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TextureFlags aTextureFlags,
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TextureAllocationFlags flags = ALLOC_DEFAULT);
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already_AddRefed<TextureClient>
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CreateOrRecycle(ITextureClientAllocationHelper& aHelper);
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protected:
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virtual already_AddRefed<TextureClient>
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Allocate(gfx::SurfaceFormat aFormat,
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gfx::IntSize aSize,
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BackendSelector aSelector,
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TextureFlags aTextureFlags,
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TextureAllocationFlags aAllocFlags);
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RefPtr<CompositableForwarder> mSurfaceAllocator;
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private:
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friend class TextureClient;
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friend class DefaultTextureClientAllocationHelper;
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void RecycleTextureClient(TextureClient* aClient);
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static const uint32_t kMaxPooledSized = 2;
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uint32_t mMaxPooledSize;
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std::map<TextureClient*, RefPtr<TextureClientHolder> > mInUseClients;
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// On b2g gonk, std::queue might be a better choice.
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// On ICS, fence wait happens implicitly before drawing.
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// Since JB, fence wait happens explicitly when fetching a client from the pool.
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// stack is good from Graphics cache usage point of view.
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std::stack<RefPtr<TextureClientHolder> > mPooledClients;
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Mutex mLock;
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};
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} // namespace layers
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} // namespace mozilla
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#endif /* MOZILLA_GFX_TEXTURECLIENT_RECYCLE_ALLOCATOR_H */
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