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Diffstat (limited to 'services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/TexturePool.h')
-rw-r--r-- | services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/TexturePool.h | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/TexturePool.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/TexturePool.h deleted file mode 100644 index fb53ee04cd..0000000000 --- a/services/surfaceflinger/CompositionEngine/include/compositionengine/impl/planner/TexturePool.h +++ /dev/null @@ -1,102 +0,0 @@ -/* - * Copyright 2021 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#pragma once - -#include <compositionengine/Output.h> -#include <compositionengine/ProjectionSpace.h> -#include <compositionengine/impl/planner/LayerState.h> -#include <renderengine/RenderEngine.h> - -#include <renderengine/ExternalTexture.h> -#include <chrono> -#include "android-base/macros.h" - -namespace android::compositionengine::impl::planner { - -// A pool of textures that only manages textures of a single size. -// While it is possible to define a texture pool supporting variable-sized textures to save on -// memory, it is a simpler implementation to only manage screen-sized textures. The texture pool is -// unbounded - there are a minimum number of textures preallocated. Under heavy system load, new -// textures may be allocated, but only a maximum number of retained once those textures are no -// longer necessary. -class TexturePool { -public: - // RAII class helping with managing textures from the texture pool - // Textures once they're no longer used should be returned to the pool instead of outright - // deleted. - class AutoTexture { - public: - AutoTexture(TexturePool& texturePool, - std::shared_ptr<renderengine::ExternalTexture> texture, const sp<Fence>& fence) - : mTexturePool(texturePool), mTexture(texture), mFence(fence) {} - - ~AutoTexture() { mTexturePool.returnTexture(std::move(mTexture), mFence); } - - sp<Fence> getReadyFence() { return mFence; } - - void setReadyFence(const sp<Fence>& fence) { mFence = fence; } - - // Disable copying and assigning - AutoTexture(const AutoTexture&) = delete; - AutoTexture& operator=(const AutoTexture&) = delete; - - // Gets a pointer to the underlying external texture - const std::shared_ptr<renderengine::ExternalTexture>& get() const { return mTexture; } - - private: - TexturePool& mTexturePool; - std::shared_ptr<renderengine::ExternalTexture> mTexture; - sp<Fence> mFence; - }; - - TexturePool(renderengine::RenderEngine& renderEngine) : mRenderEngine(renderEngine) {} - - virtual ~TexturePool() = default; - - // Sets the display size for the texture pool. - // This will trigger a reallocation for all remaining textures in the pool. - // setDisplaySize must be called for the texture pool to be used. - void setDisplaySize(ui::Size size); - - // Borrows a new texture from the pool. - // If the pool is currently starved of textures, then a new texture is generated. - // When the AutoTexture object is destroyed, the scratch texture is automatically returned - // to the pool. - std::shared_ptr<AutoTexture> borrowTexture(); - -protected: - // Proteted visibility so that they can be used for testing - const static constexpr size_t kMinPoolSize = 3; - const static constexpr size_t kMaxPoolSize = 4; - - struct Entry { - std::shared_ptr<renderengine::ExternalTexture> texture; - sp<Fence> fence; - }; - - std::deque<Entry> mPool; - -private: - std::shared_ptr<renderengine::ExternalTexture> genTexture(); - // Returns a previously borrowed texture to the pool. - void returnTexture(std::shared_ptr<renderengine::ExternalTexture>&& texture, - const sp<Fence>& fence); - renderengine::RenderEngine& mRenderEngine; - ui::Size mSize; -}; - -} // namespace android::compositionengine::impl::planner |