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/*
* Copyright (C) 2017 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 <sys/types.h>
#include <cstdint>
#include <list>
#include <gui/ISurfaceComposerClient.h>
#include <gui/LayerState.h>
#include <renderengine/Image.h>
#include <renderengine/Mesh.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 "BufferLayerConsumer.h"
#include "Client.h"
#include "DisplayHardware/HWComposer.h"
#include "FrameTimeline.h"
#include "FrameTracker.h"
#include "Layer.h"
#include "LayerVector.h"
#include "MonitoredProducer.h"
#include "SurfaceFlinger.h"
namespace android {
class BufferLayer : public Layer {
public:
explicit BufferLayer(const LayerCreationArgs& args);
virtual ~BufferLayer() 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;
// isFixedSize - true if content has a fixed size
bool isFixedSize() const override;
bool usesSourceCrop() const override;
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,
nsecs_t expectedPresentTime) override;
bool hasReadyFrame() const override;
// Returns the current scaling mode
uint32_t getEffectiveScalingMode() 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;
sp<GraphicBuffer> getBuffer() const override;
const std::shared_ptr<renderengine::ExternalTexture>& getExternalTexture() const override;
ui::Transform::RotationFlags getTransformHint() const override { return mTransformHint; }
// Returns true if the transformed buffer size does not match the layer size and we need
// to apply filtering.
virtual bool bufferNeedsFiltering() const;
protected:
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;
virtual void gatherBufferInfo() = 0;
std::optional<compositionengine::LayerFE::LayerSettings> prepareClientComposition(
compositionengine::LayerFE::ClientCompositionTargetSettings&) override;
/*
* compositionengine::LayerFE overrides
*/
const compositionengine::LayerFECompositionState* getCompositionState() const override;
bool onPreComposition(nsecs_t) override;
void preparePerFrameCompositionState() override;
static bool getOpacityForFormat(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; }
// Returns true if the next buffer should be presented at the expected present time
bool shouldPresentNow(nsecs_t expectedPresentTime) const;
// Returns true if the next buffer should be presented at the expected present time,
// overridden by BufferStateLayer and BufferQueueLayer for implementation
// specific logic
virtual bool isBufferDue(nsecs_t /*expectedPresentTime*/) const = 0;
std::atomic<bool> mSidebandStreamChanged{false};
private:
virtual bool fenceHasSignaled() const = 0;
virtual bool framePresentTimeIsCurrent(nsecs_t expectedPresentTime) const = 0;
// Latch sideband stream and returns true if the dirty region should be updated.
virtual bool latchSidebandStream(bool& recomputeVisibleRegions) = 0;
virtual bool hasFrameUpdate() const = 0;
virtual status_t updateTexImage(bool& recomputeVisibleRegions, nsecs_t latchTime,
nsecs_t expectedPresentTime) = 0;
virtual status_t updateActiveBuffer() = 0;
virtual status_t updateFrameNumber() = 0;
// 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 !mPotentialCursor; }
// Returns true if this layer requires filtering
bool needsFiltering(const DisplayDevice*) const override;
bool needsFilteringForScreenshots(const DisplayDevice*,
const ui::Transform& inverseParentTransform) const override;
// 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;
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]);
std::unique_ptr<compositionengine::LayerFECompositionState> mCompositionState;
FloatRect computeSourceBounds(const FloatRect& parentBounds) const override;
};
} // namespace android
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