SF: Merge BufferStateLayer into Layer

    name: "libsurfaceflinger_sources",

    srcs: [

        "BackgroundExecutor.cpp",

        "BufferStateLayer.cpp",

        "ClientCache.cpp",

        "Client.cpp",

        "EffectLayer.cpp",

#pragma once

#include <sys/types.h>

#include <cstdint>

#include <list>

#include <stack>

#include <android/gui/ISurfaceComposerClient.h>

#include <gui/LayerState.h>

#include <renderengine/Image.h>

#include <renderengine/Mesh.h>

#include <renderengine/RenderEngine.h>

#include <renderengine/Texture.h>

#include <system/window.h> // For NATIVE_WINDOW_SCALING_MODE_FREEZE

#include <ui/FrameStats.h>

#include <ui/GraphicBuffer.h>

#include <ui/PixelFormat.h>

#include <ui/Region.h>

#include <utils/RefBase.h>

#include <utils/String8.h>

#include <utils/Timers.h>

#include "Client.h"

#include "DisplayHardware/HWComposer.h"

#include "FrameTimeline.h"

#include "FrameTracker.h"

#include "HwcSlotGenerator.h"

#include "Layer.h"

#include "LayerVector.h"

#include "SurfaceFlinger.h"

namespace android {

class SlotGenerationTest;

class BufferStateLayer : public Layer {

public:

    explicit BufferStateLayer(const LayerCreationArgs&);

    ~BufferStateLayer() override;

    // Implements Layer.

    sp<compositionengine::LayerFE> getCompositionEngineLayerFE() const override;

    compositionengine::LayerFECompositionState* editCompositionState() override;

    // If we have received a new buffer this frame, we will pass its surface

    // damage down to hardware composer. Otherwise, we must send a region with

    // one empty rect.

    void useSurfaceDamage() override;

    void useEmptyDamage() override;

    bool isOpaque(const Layer::State& s) const override;

    bool canReceiveInput() const override;

    // isVisible - true if this layer is visible, false otherwise

    bool isVisible() const override;

    // isProtected - true if the layer may contain protected content in the

    // GRALLOC_USAGE_PROTECTED sense.

    bool isProtected() const override;

    bool usesSourceCrop() const override { return hasBufferOrSidebandStream(); }

    bool isHdrY410() const override;

    void onPostComposition(const DisplayDevice*, const std::shared_ptr<FenceTime>& glDoneFence,

                           const std::shared_ptr<FenceTime>& presentFence,

                           const CompositorTiming&) override;

    // latchBuffer - called each time the screen is redrawn and returns whether

    // the visible regions need to be recomputed (this is a fairly heavy

    // operation, so this should be set only if needed). Typically this is used

    // to figure out if the content or size of a surface has changed.

    bool latchBuffer(bool& recomputeVisibleRegions, nsecs_t latchTime) override;

    bool hasReadyFrame() const override;

    // Calls latchBuffer if the buffer has a frame queued and then releases the buffer.

    // This is used if the buffer is just latched and releases to free up the buffer

    // and will not be shown on screen.

    // Should only be called on the main thread.

    void latchAndReleaseBuffer() override;

    bool getTransformToDisplayInverse() const override;

    Rect getBufferCrop() const override;

    uint32_t getBufferTransform() const override;

    ui::Dataspace getDataSpace() const override;

    ui::Dataspace getRequestedDataSpace() const;

    sp<GraphicBuffer> getBuffer() const override;

    const std::shared_ptr<renderengine::ExternalTexture>& getExternalTexture() const override;

    ui::Transform::RotationFlags getTransformHint() const override { return mTransformHint; }

    // Implements Layer.

    const char* getType() const override { return "BufferStateLayer"; }

    void onLayerDisplayed(ftl::SharedFuture<FenceResult>) override;

    void releasePendingBuffer(nsecs_t dequeueReadyTime) override;

    Region getActiveTransparentRegion(const Layer::State& s) const override {

        return s.transparentRegionHint;

    }

    bool setTransform(uint32_t transform) override;

    bool setTransformToDisplayInverse(bool transformToDisplayInverse) override;

    bool setBuffer(std::shared_ptr<renderengine::ExternalTexture>& /* buffer */,

                   const BufferData& bufferData, nsecs_t postTime, nsecs_t desiredPresentTime,

                   bool isAutoTimestamp, std::optional<nsecs_t> dequeueTime,

                   const FrameTimelineInfo& info) override;

    bool setDataspace(ui::Dataspace dataspace) override;

    bool setHdrMetadata(const HdrMetadata& hdrMetadata) override;

    bool setSurfaceDamageRegion(const Region& surfaceDamage) override;

    bool setApi(int32_t api) override;

    bool setSidebandStream(const sp<NativeHandle>& sidebandStream) override;

    bool setTransactionCompletedListeners(const std::vector<sp<CallbackHandle>>& handles) override;

    bool setPosition(float /*x*/, float /*y*/) override;

    bool setMatrix(const layer_state_t::matrix22_t& /*matrix*/);

    // BufferStateLayers can return Rect::INVALID_RECT if the layer does not have a display frame

    // and its parent layer is not bounded

    Rect getBufferSize(const State& s) const override;

    FloatRect computeSourceBounds(const FloatRect& parentBounds) const override;

    void setAutoRefresh(bool autoRefresh) override;

    bool setBufferCrop(const Rect& bufferCrop) override;

    bool setDestinationFrame(const Rect& destinationFrame) override;

    bool updateGeometry() override;

    bool fenceHasSignaled() const;

    bool onPreComposition(nsecs_t) override;

    // See mPendingBufferTransactions

    void decrementPendingBufferCount();

    std::atomic<int32_t>* getPendingBufferCounter() override { return &mPendingBufferTransactions; }

    std::string getPendingBufferCounterName() override { return mBlastTransactionName; }

    std::optional<compositionengine::LayerFE::LayerSettings> prepareClientComposition(

            compositionengine::LayerFE::ClientCompositionTargetSettings&) const override;

    bool setColor(const half3& color) override;

protected:

    void gatherBufferInfo();

    void onSurfaceFrameCreated(const std::shared_ptr<frametimeline::SurfaceFrame>& surfaceFrame);

    ui::Transform getInputTransform() const override;

    Rect getInputBounds() const override;

    struct BufferInfo {

        nsecs_t mDesiredPresentTime;

        std::shared_ptr<FenceTime> mFenceTime;

        sp<Fence> mFence;

        uint32_t mTransform{0};

        ui::Dataspace mDataspace{ui::Dataspace::UNKNOWN};

        Rect mCrop;

        uint32_t mScaleMode{NATIVE_WINDOW_SCALING_MODE_FREEZE};

        Region mSurfaceDamage;

        HdrMetadata mHdrMetadata;

        int mApi;

        PixelFormat mPixelFormat{PIXEL_FORMAT_NONE};

        bool mTransformToDisplayInverse{false};

        std::shared_ptr<renderengine::ExternalTexture> mBuffer;

        uint64_t mFrameNumber;

        int mBufferSlot{BufferQueue::INVALID_BUFFER_SLOT};

        bool mFrameLatencyNeeded{false};

    };

    BufferInfo mBufferInfo;

    /*

     * compositionengine::LayerFE overrides

     */

    const compositionengine::LayerFECompositionState* getCompositionState() const override;

    void preparePerFrameCompositionState() override;

    void preparePerFrameBufferCompositionState();

    void preparePerFrameEffectsCompositionState();

    static bool isOpaqueFormat(PixelFormat format);

    // from graphics API

    const uint32_t mTextureName;

    ui::Dataspace translateDataspace(ui::Dataspace dataspace);

    void setInitialValuesForClone(const sp<Layer>& clonedFrom);

    void updateCloneBufferInfo() override;

    uint64_t mPreviousFrameNumber = 0;

    void setTransformHint(ui::Transform::RotationFlags displayTransformHint) override;

    // Transform hint provided to the producer. This must be accessed holding

    // the mStateLock.

    ui::Transform::RotationFlags mTransformHint = ui::Transform::ROT_0;

    bool getAutoRefresh() const { return mDrawingState.autoRefresh; }

    bool getSidebandStreamChanged() const { return mSidebandStreamChanged; }

    std::atomic<bool> mSidebandStreamChanged{false};

private:

    friend class SlotGenerationTest;

    friend class TransactionFrameTracerTest;

    friend class TransactionSurfaceFrameTest;

    // We generate InputWindowHandles for all non-cursor buffered layers regardless of whether they

    // have an InputChannel. This is to enable the InputDispatcher to do PID based occlusion

    // detection.

    bool needsInputInfo() const override {

        return (hasInputInfo() || hasBufferOrSidebandStream()) && !mPotentialCursor;

    }

    // Returns true if this layer requires filtering

    bool needsFiltering(const DisplayDevice*) const override;

    bool needsFilteringForScreenshots(const DisplayDevice*,

                                      const ui::Transform& inverseParentTransform) const override;

    PixelFormat getPixelFormat() const;

    // Computes the transform matrix using the setFilteringEnabled to determine whether the

    // transform matrix should be computed for use with bilinear filtering.

    void getDrawingTransformMatrix(bool filteringEnabled, float outMatrix[16]) const;

    std::unique_ptr<compositionengine::LayerFECompositionState> mCompositionState;

    inline void tracePendingBufferCount(int32_t pendingBuffers);

    bool updateFrameEventHistory(const sp<Fence>& acquireFence, nsecs_t postedTime,

                                 nsecs_t requestedPresentTime);

    // Latch sideband stream and returns true if the dirty region should be updated.

    bool latchSidebandStream(bool& recomputeVisibleRegions);

    bool hasFrameUpdate() const;

    void updateTexImage(nsecs_t latchTime);

    sp<Layer> createClone() override;

    // Crop that applies to the buffer

    Rect computeBufferCrop(const State& s);

    bool willPresentCurrentTransaction() const;

    // Returns true if the transformed buffer size does not match the layer size and we need

    // to apply filtering.

    bool bufferNeedsFiltering() const;

    bool simpleBufferUpdate(const layer_state_t& s) const override;

    void callReleaseBufferCallback(const sp<ITransactionCompletedListener>& listener,

                                   const sp<GraphicBuffer>& buffer, uint64_t framenumber,

                                   const sp<Fence>& releaseFence,

                                   uint32_t currentMaxAcquiredBufferCount);

    std::optional<compositionengine::LayerFE::LayerSettings> prepareClientCompositionInternal(

            compositionengine::LayerFE::ClientCompositionTargetSettings&) const;

    // Returns true if there is a valid color to fill.

    bool fillsColor() const;

    // Returns true if this layer has a blur value.

    bool hasBlur() const;

    bool hasEffect() const { return fillsColor() || drawShadows() || hasBlur(); }

    bool hasBufferOrSidebandStream() const {

        return ((mSidebandStream != nullptr) || (mBufferInfo.mBuffer != nullptr));

    }

    bool hasSomethingToDraw() const { return hasEffect() || hasBufferOrSidebandStream(); }

    void prepareEffectsClientComposition(

            compositionengine::LayerFE::LayerSettings&,

            compositionengine::LayerFE::ClientCompositionTargetSettings&) const;

    ReleaseCallbackId mPreviousReleaseCallbackId = ReleaseCallbackId::INVALID_ID;

    uint64_t mPreviousReleasedFrameNumber = 0;

    uint64_t mPreviousBarrierFrameNumber = 0;

    bool mReleasePreviousBuffer = false;

    // Stores the last set acquire fence signal time used to populate the callback handle's acquire

    // time.

    std::variant<nsecs_t, sp<Fence>> mCallbackHandleAcquireTimeOrFence = -1;

    std::deque<std::shared_ptr<android::frametimeline::SurfaceFrame>> mPendingJankClassifications;

    // An upper bound on the number of SurfaceFrames in the pending classifications deque.

    static constexpr int kPendingClassificationMaxSurfaceFrames = 25;

    const std::string mBlastTransactionName{"BufferTX - " + mName};

    // This integer is incremented everytime a buffer arrives at the server for this layer,

    // and decremented when a buffer is dropped or latched. When changed the integer is exported

    // to systrace with ATRACE_INT and mBlastTransactionName. This way when debugging perf it is

    // possible to see when a buffer arrived at the server, and in which frame it latched.

    //

    // You can understand the trace this way:

    //     - If the integer increases, a buffer arrived at the server.

    //     - If the integer decreases in latchBuffer, that buffer was latched

    //     - If the integer decreases in setBuffer or doTransaction, a buffer was dropped

    std::atomic<int32_t> mPendingBufferTransactions{0};

    // Contains requested position and matrix updates. This will be applied if the client does

    // not specify a destination frame.

    ui::Transform mRequestedTransform;

    sp<HwcSlotGenerator> mHwcSlotGenerator;

    explicit BufferStateLayer(const LayerCreationArgs& args) : Layer(args){};

};

} // namespace android