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comparison: gfx/layers/client/SimpleTextureClientPool.h
gfx/layers/client/SimpleTextureClientPool.h
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| 1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef MOZILLA_GFX_SIMPLETEXTURECLIENTPOOL_H | |
| 7 #define MOZILLA_GFX_SIMPLETEXTURECLIENTPOOL_H | |
| 8 | |
| 9 #include "mozilla/gfx/Types.h" | |
| 10 #include "mozilla/gfx/Point.h" | |
| 11 #include "mozilla/RefPtr.h" | |
| 12 #include "TextureClient.h" | |
| 13 #include "nsITimer.h" | |
| 14 #include <stack> | |
| 15 #include <list> | |
| 16 | |
| 17 namespace mozilla { | |
| 18 namespace layers { | |
| 19 | |
| 20 class ISurfaceAllocator; | |
| 21 | |
| 22 class SimpleTextureClientPool | |
| 23 { | |
| 24 ~SimpleTextureClientPool() | |
| 25 { | |
| 26 for (auto it = mOutstandingTextureClients.begin(); it != mOutstandingTextureClients.end(); ++it) { | |
| 27 (*it)->ClearRecycleCallback(); | |
| 28 } | |
| 29 } | |
| 30 | |
| 31 public: | |
| 32 NS_INLINE_DECL_REFCOUNTING(SimpleTextureClientPool) | |
| 33 | |
| 34 SimpleTextureClientPool(gfx::SurfaceFormat aFormat, gfx::IntSize aSize, | |
| 35 ISurfaceAllocator *aAllocator); | |
| 36 | |
| 37 /** | |
| 38 * If a TextureClient is AutoRecycled, when the last reference is | |
| 39 * released this object will be automatically return to the pool as | |
| 40 * soon as the compositor informs us it is done with it. | |
| 41 */ | |
| 42 TemporaryRef<TextureClient> GetTextureClient(bool aAutoRecycle = false); | |
| 43 TemporaryRef<TextureClient> GetTextureClientWithAutoRecycle() { return GetTextureClient(true); } | |
| 44 | |
| 45 void ReturnTextureClient(TextureClient *aClient); | |
| 46 | |
| 47 void ShrinkToMinimumSize(); | |
| 48 | |
| 49 void Clear(); | |
| 50 | |
| 51 private: | |
| 52 // The time in milliseconds before the pool will be shrunk to the minimum | |
| 53 // size after returning a client. | |
| 54 static const uint32_t sShrinkTimeout = 3000; | |
| 55 | |
| 56 // The minimum size of the pool (the number of tiles that will be kept after | |
| 57 // shrinking). | |
| 58 static const uint32_t sMinCacheSize = 16; | |
| 59 | |
| 60 // This is the number of cached texture clients we don't want to exceed, even | |
| 61 // temporarily (pre-shrink) | |
| 62 static const uint32_t sMaxTextureClients = 50; | |
| 63 | |
| 64 static void ShrinkCallback(nsITimer *aTimer, void *aClosure); | |
| 65 static void RecycleCallback(TextureClient* aClient, void* aClosure); | |
| 66 static void WaitForCompositorRecycleCallback(TextureClient* aClient, void* aClosure); | |
| 67 | |
| 68 gfx::SurfaceFormat mFormat; | |
| 69 gfx::IntSize mSize; | |
| 70 | |
| 71 // We use a std::stack and make sure to use it the following way: | |
| 72 // new (available to be used) elements are push()'d to the front | |
| 73 // requests are served from the front via pop() | |
| 74 // -- the thinking is that recently-used elements are most likely | |
| 75 // to be in any data cache, so we can get some wins there | |
| 76 // -- the converse though is that if there is some GPU locking going on | |
| 77 // the most recently used elements may also have the most contention; | |
| 78 // if we see that, then we should use push_back() to add new elements | |
| 79 // when we shrink this list, we use pop(), but should use pop_back() to | |
| 80 // nuke the oldest. | |
| 81 // We may need to switch to a std::deque | |
| 82 // On b2g gonk, std::queue might be a better choice. | |
| 83 // On ICS, fence wait happens implicitly before drawing. | |
| 84 // Since JB, fence wait happens explicitly when fetching a client from the pool. | |
| 85 std::stack<RefPtr<TextureClient> > mAvailableTextureClients; | |
| 86 std::list<RefPtr<TextureClient> > mOutstandingTextureClients; | |
| 87 | |
| 88 nsRefPtr<nsITimer> mTimer; | |
| 89 RefPtr<ISurfaceAllocator> mSurfaceAllocator; | |
| 90 }; | |
| 91 | |
| 92 } | |
| 93 } | |
| 94 #endif /* MOZILLA_GFX_SIMPLETEXTURECLIENTPOOL_H */ |
