libs/gui/include/gui/LayerState.h - platform/frameworks/native - Git at Google

 /*
  * Copyright (C) 2008 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.
  */

 #ifndef ANDROID_SF_LAYER_STATE_H
 #define ANDROID_SF_LAYER_STATE_H


 #include <stdint.h>
 #include <sys/types.h>

 #include <android/gui/IWindowInfosReportedListener.h>
 #include <android/gui/TrustedPresentationThresholds.h>
 #include <android/native_window.h>
 #include <gui/IGraphicBufferProducer.h>
 #include <gui/ITransactionCompletedListener.h>
 #include <math/mat4.h>

 #include <android/gui/DropInputMode.h>
 #include <android/gui/FocusRequest.h>

 #include <ftl/flags.h>
 #include <gui/DisplayCaptureArgs.h>
 #include <gui/ISurfaceComposer.h>
 #include <gui/LayerCaptureArgs.h>
 #include <gui/LayerMetadata.h>
 #include <gui/SpHash.h>
 #include <gui/SurfaceControl.h>
 #include <gui/WindowInfo.h>
 #include <math/vec3.h>
 #include <ui/BlurRegion.h>
 #include <ui/GraphicTypes.h>
 #include <ui/LayerStack.h>
 #include <ui/Rect.h>
 #include <ui/Region.h>
 #include <ui/Rotation.h>
 #include <ui/StretchEffect.h>
 #include <ui/Transform.h>
 #include <utils/Errors.h>

 namespace android {

 class Parcel;

 using gui::ISurfaceComposerClient;
 using gui::LayerMetadata;

 using gui::TrustedPresentationThresholds;

 struct client_cache_t {
     wp<IBinder> token = nullptr;
     uint64_t id;

     bool operator==(const client_cache_t& other) const { return id == other.id; }

     bool isValid() const { return token != nullptr; }
 };

 class TrustedPresentationListener : public Parcelable {
 public:
     sp<ITransactionCompletedListener> callbackInterface;
     int callbackId = -1;

     void invoke(bool presentedWithinThresholds) {
         callbackInterface->onTrustedPresentationChanged(callbackId, presentedWithinThresholds);
     }

     status_t writeToParcel(Parcel* parcel) const;
     status_t readFromParcel(const Parcel* parcel);
 };

 class BufferData : public Parcelable {
 public:
     virtual ~BufferData() = default;
     virtual bool hasBuffer() const { return buffer != nullptr; }
     virtual bool hasSameBuffer(const BufferData& other) const {
         return buffer == other.buffer && frameNumber == other.frameNumber;
     }
     virtual uint32_t getWidth() const { return buffer->getWidth(); }
     virtual uint32_t getHeight() const { return buffer->getHeight(); }
     Rect getBounds() const {
         return {0, 0, static_cast<int32_t>(getWidth()), static_cast<int32_t>(getHeight())};
     }
     virtual uint64_t getId() const { return buffer->getId(); }
     virtual PixelFormat getPixelFormat() const { return buffer->getPixelFormat(); }
     virtual uint64_t getUsage() const { return buffer->getUsage(); }

     enum class BufferDataChange : uint32_t {
         fenceChanged = 0x01,
         frameNumberChanged = 0x02,
         cachedBufferChanged = 0x04,
     };

     sp<GraphicBuffer> buffer;
     sp<Fence> acquireFence;

     // Used by BlastBufferQueue to forward the framenumber generated by the
     // graphics producer.
     uint64_t frameNumber = 0;
     bool hasBarrier = false;
     uint64_t barrierFrameNumber = 0;
     uint32_t producerId = 0;

     // Listens to when the buffer is safe to be released. This is used for blast
     // layers only. The callback includes a release fence as well as the graphic
     // buffer id to identify the buffer.
     sp<ITransactionCompletedListener> releaseBufferListener = nullptr;

     // Stores which endpoint the release information should be sent to. We don't want to send the
     // releaseCallbackId and release fence to all listeners so we store which listener the setBuffer
     // was called with.
     sp<IBinder> releaseBufferEndpoint;

     ftl::Flags<BufferDataChange> flags;

     client_cache_t cachedBuffer;

     // Generates the release callback id based on the buffer id and frame number.
     // This is used as an identifier when release callbacks are invoked.
     ReleaseCallbackId generateReleaseCallbackId() const;

     status_t writeToParcel(Parcel* parcel) const override;
     status_t readFromParcel(const Parcel* parcel) override;
 };

 /*
  * Used to communicate layer information between SurfaceFlinger and its clients.
  */
 struct layer_state_t {
     enum Permission {
         ACCESS_SURFACE_FLINGER = 0x1,
         ROTATE_SURFACE_FLINGER = 0x2,
         INTERNAL_SYSTEM_WINDOW = 0x4,
     };

     enum {
         eLayerHidden = 0x01,         // SURFACE_HIDDEN in SurfaceControl.java
         eLayerOpaque = 0x02,         // SURFACE_OPAQUE
         eLayerSkipScreenshot = 0x40, // SKIP_SCREENSHOT
         eLayerSecure = 0x80,         // SECURE
         // Queue up layer buffers instead of dropping the oldest buffer when this flag is
         // set. This blocks the client until all the buffers have been presented. If the buffers
         // have presentation timestamps, then we may drop buffers.
         eEnableBackpressure = 0x100,       // ENABLE_BACKPRESSURE
         eLayerIsDisplayDecoration = 0x200, // DISPLAY_DECORATION
         // Ignore any destination frame set on the layer. This is used when the buffer scaling mode
         // is freeze and the destination frame is applied asynchronously with the buffer submission.
         // This is needed to maintain compatibility for SurfaceView scaling behavior.
         // See SurfaceView scaling behavior for more details.
         eIgnoreDestinationFrame = 0x400,
         eLayerIsRefreshRateIndicator = 0x800, // REFRESH_RATE_INDICATOR
     };

     enum {
         ePositionChanged = 0x00000001,
         eLayerChanged = 0x00000002,
         eTrustedPresentationInfoChanged = 0x00000004,
         eAlphaChanged = 0x00000008,
         eMatrixChanged = 0x00000010,
         eTransparentRegionChanged = 0x00000020,
         eFlagsChanged = 0x00000040,
         eLayerStackChanged = 0x00000080,
         eFlushJankData = 0x00000100,
         eCachingHintChanged = 0x00000200,
         eDimmingEnabledChanged = 0x00000400,
         eShadowRadiusChanged = 0x00000800,
         eRenderBorderChanged = 0x00001000,
         eBufferCropChanged = 0x00002000,
         eRelativeLayerChanged = 0x00004000,
         eReparent = 0x00008000,
         eColorChanged = 0x00010000,
         eFrameRateCategoryChanged = 0x00020000,
         eBufferTransformChanged = 0x00040000,
         eTransformToDisplayInverseChanged = 0x00080000,
         eCropChanged = 0x00100000,
         eBufferChanged = 0x00200000,
         eDefaultFrameRateCompatibilityChanged = 0x00400000,
         eDataspaceChanged = 0x00800000,
         eHdrMetadataChanged = 0x01000000,
         eSurfaceDamageRegionChanged = 0x02000000,
         eApiChanged = 0x04000000,
         eSidebandStreamChanged = 0x08000000,
         eColorTransformChanged = 0x10000000,
         eHasListenerCallbacksChanged = 0x20000000,
         eInputInfoChanged = 0x40000000,
         eCornerRadiusChanged = 0x80000000,
         eDestinationFrameChanged = 0x1'00000000,
         /* unused = 0x2'00000000, */
         eBackgroundColorChanged = 0x4'00000000,
         eMetadataChanged = 0x8'00000000,
         eColorSpaceAgnosticChanged = 0x10'00000000,
         eFrameRateSelectionPriority = 0x20'00000000,
         eFrameRateChanged = 0x40'00000000,
         eBackgroundBlurRadiusChanged = 0x80'00000000,
         eProducerDisconnect = 0x100'00000000,
         eFixedTransformHintChanged = 0x200'00000000,
         /* unused 0x400'00000000, */
         eBlurRegionsChanged = 0x800'00000000,
         eAutoRefreshChanged = 0x1000'00000000,
         eStretchChanged = 0x2000'00000000,
         eTrustedOverlayChanged = 0x4000'00000000,
         eDropInputModeChanged = 0x8000'00000000,
         eExtendedRangeBrightnessChanged = 0x10000'00000000,
     };

     layer_state_t();

     void merge(const layer_state_t& other);
     status_t write(Parcel& output) const;
     status_t read(const Parcel& input);
     // Compares two layer_state_t structs and returns a set of change flags describing all the
     // states that are different.
     uint64_t diff(const layer_state_t& other) const;
     bool hasBufferChanges() const;

     // Layer hierarchy updates.
     static constexpr uint64_t HIERARCHY_CHANGES = layer_state_t::eLayerChanged |
             layer_state_t::eRelativeLayerChanged | layer_state_t::eReparent |
             layer_state_t::eLayerStackChanged;

     // Geometry updates.
     static constexpr uint64_t GEOMETRY_CHANGES = layer_state_t::eBufferCropChanged |
             layer_state_t::eBufferTransformChanged | layer_state_t::eCornerRadiusChanged |
             layer_state_t::eCropChanged | layer_state_t::eDestinationFrameChanged |
             layer_state_t::eMatrixChanged | layer_state_t::ePositionChanged |
             layer_state_t::eTransformToDisplayInverseChanged |
             layer_state_t::eTransparentRegionChanged;

     // Buffer and related updates.
     static constexpr uint64_t BUFFER_CHANGES = layer_state_t::eApiChanged |
             layer_state_t::eBufferChanged | layer_state_t::eBufferCropChanged |
             layer_state_t::eBufferTransformChanged | layer_state_t::eDataspaceChanged |
             layer_state_t::eSidebandStreamChanged | layer_state_t::eSurfaceDamageRegionChanged |
             layer_state_t::eTransformToDisplayInverseChanged |
             layer_state_t::eTransparentRegionChanged |
             layer_state_t::eExtendedRangeBrightnessChanged;

     // Content updates.
     static constexpr uint64_t CONTENT_CHANGES = layer_state_t::BUFFER_CHANGES |
             layer_state_t::eAlphaChanged | layer_state_t::eAutoRefreshChanged |
             layer_state_t::eBackgroundBlurRadiusChanged | layer_state_t::eBackgroundColorChanged |
             layer_state_t::eBlurRegionsChanged | layer_state_t::eColorChanged |
             layer_state_t::eColorSpaceAgnosticChanged | layer_state_t::eColorTransformChanged |
             layer_state_t::eCornerRadiusChanged | layer_state_t::eDimmingEnabledChanged |
             layer_state_t::eHdrMetadataChanged | layer_state_t::eRenderBorderChanged |
             layer_state_t::eShadowRadiusChanged | layer_state_t::eStretchChanged;

     // Changes which invalidates the layer's visible region in CE.
     static constexpr uint64_t CONTENT_DIRTY = layer_state_t::CONTENT_CHANGES |
             layer_state_t::GEOMETRY_CHANGES | layer_state_t::HIERARCHY_CHANGES;

     // Changes affecting child states.
     static constexpr uint64_t AFFECTS_CHILDREN = layer_state_t::GEOMETRY_CHANGES |
             layer_state_t::HIERARCHY_CHANGES | layer_state_t::eAlphaChanged |
             layer_state_t::eBackgroundBlurRadiusChanged | layer_state_t::eBlurRegionsChanged |
             layer_state_t::eColorTransformChanged | layer_state_t::eCornerRadiusChanged |
             layer_state_t::eFlagsChanged | layer_state_t::eTrustedOverlayChanged |
             layer_state_t::eFrameRateChanged | layer_state_t::eFrameRateCategoryChanged |
             layer_state_t::eFrameRateSelectionPriority | layer_state_t::eFixedTransformHintChanged;

     // Changes affecting data sent to input.
     static constexpr uint64_t INPUT_CHANGES = layer_state_t::eInputInfoChanged |
             layer_state_t::eDropInputModeChanged | layer_state_t::eTrustedOverlayChanged |
             layer_state_t::eLayerStackChanged;

     // Changes that affect the visible region on a display.
     static constexpr uint64_t VISIBLE_REGION_CHANGES =
             layer_state_t::GEOMETRY_CHANGES | layer_state_t::HIERARCHY_CHANGES;

     bool hasValidBuffer() const;
     void sanitize(int32_t permissions);

     struct matrix22_t {
         float dsdx{0};
         float dtdx{0};
         float dtdy{0};
         float dsdy{0};
         status_t write(Parcel& output) const;
         status_t read(const Parcel& input);
         inline bool operator==(const matrix22_t& other) const {
             return std::tie(dsdx, dtdx, dtdy, dsdy) ==
                     std::tie(other.dsdx, other.dtdx, other.dtdy, other.dsdy);
         }
         inline bool operator!=(const matrix22_t& other) const { return !(*this == other); }
     };
     sp<IBinder> surface;
     int32_t layerId;
     uint64_t what;
     float x;
     float y;
     int32_t z;
     ui::LayerStack layerStack = ui::DEFAULT_LAYER_STACK;
     uint32_t flags;
     uint32_t mask;
     uint8_t reserved;
     matrix22_t matrix;
     float cornerRadius;
     uint32_t backgroundBlurRadius;

     sp<SurfaceControl> relativeLayerSurfaceControl;

     sp<SurfaceControl> parentSurfaceControlForChild;

     half4 color;

     // non POD must be last. see write/read
     Region transparentRegion;
     uint32_t bufferTransform;
     bool transformToDisplayInverse;
     Rect crop;
     std::shared_ptr<BufferData> bufferData = nullptr;
     ui::Dataspace dataspace;
     HdrMetadata hdrMetadata;
     Region surfaceDamageRegion;
     int32_t api;
     sp<NativeHandle> sidebandStream;
     mat4 colorTransform;
     std::vector<BlurRegion> blurRegions;

     sp<gui::WindowInfoHandle> windowInfoHandle = sp<gui::WindowInfoHandle>::make();

     LayerMetadata metadata;

     // The following refer to the alpha, and dataspace, respectively of
     // the background color layer
     half4 bgColor;
     ui::Dataspace bgColorDataspace;

     // A color space agnostic layer means the color of this layer can be
     // interpreted in any color space.
     bool colorSpaceAgnostic;

     std::vector<ListenerCallbacks> listeners;

     // Draws a shadow around the surface.
     float shadowRadius;

     // Priority of the layer assigned by Window Manager.
     int32_t frameRateSelectionPriority;

     // Layer frame rate and compatibility. See ANativeWindow_setFrameRate().
     float frameRate;
     int8_t frameRateCompatibility;
     int8_t changeFrameRateStrategy;

     // Default frame rate compatibility used to set the layer refresh rate votetype.
     int8_t defaultFrameRateCompatibility;

     // Frame rate category to suggest what frame rate range a surface should run.
     int8_t frameRateCategory;

     // Set by window manager indicating the layer and all its children are
     // in a different orientation than the display. The hint suggests that
     // the graphic producers should receive a transform hint as if the
     // display was in this orientation. When the display changes to match
     // the layer orientation, the graphic producer may not need to allocate
     // a buffer of a different size. -1 means the transform hint is not set,
     // otherwise the value will be a valid ui::Rotation.
     ui::Transform::RotationFlags fixedTransformHint;

     // Indicates that the consumer should acquire the next frame as soon as it
     // can and not wait for a frame to become available. This is only relevant
     // in shared buffer mode.
     bool autoRefresh;

     // An inherited state that indicates that this surface control and its children
     // should be trusted for input occlusion detection purposes
     bool isTrustedOverlay;

     // Flag to indicate if border needs to be enabled on the layer
     bool borderEnabled;
     float borderWidth;
     half4 borderColor;

     // Stretch effect to be applied to this layer
     StretchEffect stretchEffect;

     Rect bufferCrop;
     Rect destinationFrame;

     // Force inputflinger to drop all input events for the layer and its children.
     gui::DropInputMode dropInputMode;

     bool dimmingEnabled;
     float currentHdrSdrRatio = 1.f;
     float desiredHdrSdrRatio = 1.f;

     gui::CachingHint cachingHint = gui::CachingHint::Enabled;

     TrustedPresentationThresholds trustedPresentationThresholds;
     TrustedPresentationListener trustedPresentationListener;
 };

 class ComposerState {
 public:
     layer_state_t state;
     status_t write(Parcel& output) const;
     status_t read(const Parcel& input);
 };

 struct DisplayState {
     enum {
         eSurfaceChanged = 0x01,
         eLayerStackChanged = 0x02,
         eDisplayProjectionChanged = 0x04,
         eDisplaySizeChanged = 0x08,
         eFlagsChanged = 0x10
     };

     DisplayState();
     void merge(const DisplayState& other);
     void sanitize(int32_t permissions);

     uint32_t what = 0;
     uint32_t flags = 0;
     sp<IBinder> token;
     sp<IGraphicBufferProducer> surface;

     ui::LayerStack layerStack = ui::DEFAULT_LAYER_STACK;

     // These states define how layers are projected onto the physical display.
     //
     // Layers are first clipped to `layerStackSpaceRect'.  They are then translated and
     // scaled from `layerStackSpaceRect' to `orientedDisplaySpaceRect'.  Finally, they are rotated
     // according to `orientation', `width', and `height'.
     //
     // For example, assume layerStackSpaceRect is Rect(0, 0, 200, 100), orientedDisplaySpaceRect is
     // Rect(20, 10, 420, 210), and the size of the display is WxH.  When orientation is 0, layers
     // will be scaled by a factor of 2 and translated by (20, 10). When orientation is 1, layers
     // will be additionally rotated by 90 degrees around the origin clockwise and translated by (W,
     // 0).
     ui::Rotation orientation = ui::ROTATION_0;
     Rect layerStackSpaceRect = Rect::EMPTY_RECT;
     Rect orientedDisplaySpaceRect = Rect::EMPTY_RECT;

     uint32_t width = 0;
     uint32_t height = 0;

     status_t write(Parcel& output) const;
     status_t read(const Parcel& input);
 };

 struct InputWindowCommands {
     std::vector<gui::FocusRequest> focusRequests;
     std::unordered_set<sp<gui::IWindowInfosReportedListener>,
                        SpHash<gui::IWindowInfosReportedListener>>
             windowInfosReportedListeners;

     // Merges the passed in commands and returns true if there were any changes.
     bool merge(const InputWindowCommands& other);
     bool empty() const;
     void clear();
     status_t write(Parcel& output) const;
     status_t read(const Parcel& input);
 };

 static inline int compare_type(const ComposerState& lhs, const ComposerState& rhs) {
     if (lhs.state.surface < rhs.state.surface) return -1;
     if (lhs.state.surface > rhs.state.surface) return 1;
     return 0;
 }

 static inline int compare_type(const DisplayState& lhs, const DisplayState& rhs) {
     return compare_type(lhs.token, rhs.token);
 }

 // Returns true if the frameRate is valid.
 //
 // @param frameRate the frame rate in Hz
 // @param compatibility a ANATIVEWINDOW_FRAME_RATE_COMPATIBILITY_*
 // @param changeFrameRateStrategy a ANATIVEWINDOW_CHANGE_FRAME_RATE_*
 // @param functionName calling function or nullptr. Used for logging
 // @param privileged whether caller has unscoped surfaceflinger access
 bool ValidateFrameRate(float frameRate, int8_t compatibility, int8_t changeFrameRateStrategy,
                        const char* functionName, bool privileged = false);

 }; // namespace android

 #endif // ANDROID_SF_LAYER_STATE_H
	/*
	* Copyright (C) 2008 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.
	*/

	#ifndef ANDROID_SF_LAYER_STATE_H
	#define ANDROID_SF_LAYER_STATE_H


	#include <stdint.h>
	#include <sys/types.h>

	#include <android/gui/IWindowInfosReportedListener.h>
	#include <android/gui/TrustedPresentationThresholds.h>
	#include <android/native_window.h>
	#include <gui/IGraphicBufferProducer.h>
	#include <gui/ITransactionCompletedListener.h>
	#include <math/mat4.h>

	#include <android/gui/DropInputMode.h>
	#include <android/gui/FocusRequest.h>

	#include <ftl/flags.h>
	#include <gui/DisplayCaptureArgs.h>
	#include <gui/ISurfaceComposer.h>
	#include <gui/LayerCaptureArgs.h>
	#include <gui/LayerMetadata.h>
	#include <gui/SpHash.h>
	#include <gui/SurfaceControl.h>
	#include <gui/WindowInfo.h>
	#include <math/vec3.h>
	#include <ui/BlurRegion.h>
	#include <ui/GraphicTypes.h>
	#include <ui/LayerStack.h>
	#include <ui/Rect.h>
	#include <ui/Region.h>
	#include <ui/Rotation.h>
	#include <ui/StretchEffect.h>
	#include <ui/Transform.h>
	#include <utils/Errors.h>

	namespace android {

	class Parcel;

	using gui::ISurfaceComposerClient;
	using gui::LayerMetadata;

	using gui::TrustedPresentationThresholds;

	struct client_cache_t {
	wp<IBinder> token = nullptr;
	uint64_t id;

	bool operator==(const client_cache_t& other) const { return id == other.id; }

	bool isValid() const { return token != nullptr; }
	};

	class TrustedPresentationListener : public Parcelable {
	public:
	sp<ITransactionCompletedListener> callbackInterface;
	int callbackId = -1;

	void invoke(bool presentedWithinThresholds) {
	callbackInterface->onTrustedPresentationChanged(callbackId, presentedWithinThresholds);
	}

	status_t writeToParcel(Parcel* parcel) const;
	status_t readFromParcel(const Parcel* parcel);
	};

	class BufferData : public Parcelable {
	public:
	virtual ~BufferData() = default;
	virtual bool hasBuffer() const { return buffer != nullptr; }
	virtual bool hasSameBuffer(const BufferData& other) const {
	return buffer == other.buffer && frameNumber == other.frameNumber;
	}
	virtual uint32_t getWidth() const { return buffer->getWidth(); }
	virtual uint32_t getHeight() const { return buffer->getHeight(); }
	Rect getBounds() const {
	return {0, 0, static_cast<int32_t>(getWidth()), static_cast<int32_t>(getHeight())};
	}
	virtual uint64_t getId() const { return buffer->getId(); }
	virtual PixelFormat getPixelFormat() const { return buffer->getPixelFormat(); }
	virtual uint64_t getUsage() const { return buffer->getUsage(); }

	enum class BufferDataChange : uint32_t {
	fenceChanged = 0x01,
	frameNumberChanged = 0x02,
	cachedBufferChanged = 0x04,
	};

	sp<GraphicBuffer> buffer;
	sp<Fence> acquireFence;

	// Used by BlastBufferQueue to forward the framenumber generated by the
	// graphics producer.
	uint64_t frameNumber = 0;
	bool hasBarrier = false;
	uint64_t barrierFrameNumber = 0;
	uint32_t producerId = 0;

	// Listens to when the buffer is safe to be released. This is used for blast
	// layers only. The callback includes a release fence as well as the graphic
	// buffer id to identify the buffer.
	sp<ITransactionCompletedListener> releaseBufferListener = nullptr;

	// Stores which endpoint the release information should be sent to. We don't want to send the
	// releaseCallbackId and release fence to all listeners so we store which listener the setBuffer
	// was called with.
	sp<IBinder> releaseBufferEndpoint;

	ftl::Flags<BufferDataChange> flags;

	client_cache_t cachedBuffer;

	// Generates the release callback id based on the buffer id and frame number.
	// This is used as an identifier when release callbacks are invoked.
	ReleaseCallbackId generateReleaseCallbackId() const;

	status_t writeToParcel(Parcel* parcel) const override;
	status_t readFromParcel(const Parcel* parcel) override;
	};

	/*
	* Used to communicate layer information between SurfaceFlinger and its clients.
	*/
	struct layer_state_t {
	enum Permission {
	ACCESS_SURFACE_FLINGER = 0x1,
	ROTATE_SURFACE_FLINGER = 0x2,
	INTERNAL_SYSTEM_WINDOW = 0x4,
	};

	enum {
	eLayerHidden = 0x01, // SURFACE_HIDDEN in SurfaceControl.java
	eLayerOpaque = 0x02, // SURFACE_OPAQUE
	eLayerSkipScreenshot = 0x40, // SKIP_SCREENSHOT
	eLayerSecure = 0x80, // SECURE
	// Queue up layer buffers instead of dropping the oldest buffer when this flag is
	// set. This blocks the client until all the buffers have been presented. If the buffers
	// have presentation timestamps, then we may drop buffers.
	eEnableBackpressure = 0x100, // ENABLE_BACKPRESSURE
	eLayerIsDisplayDecoration = 0x200, // DISPLAY_DECORATION
	// Ignore any destination frame set on the layer. This is used when the buffer scaling mode
	// is freeze and the destination frame is applied asynchronously with the buffer submission.
	// This is needed to maintain compatibility for SurfaceView scaling behavior.
	// See SurfaceView scaling behavior for more details.
	eIgnoreDestinationFrame = 0x400,
	eLayerIsRefreshRateIndicator = 0x800, // REFRESH_RATE_INDICATOR
	};

	enum {
	ePositionChanged = 0x00000001,
	eLayerChanged = 0x00000002,
	eTrustedPresentationInfoChanged = 0x00000004,
	eAlphaChanged = 0x00000008,
	eMatrixChanged = 0x00000010,
	eTransparentRegionChanged = 0x00000020,
	eFlagsChanged = 0x00000040,
	eLayerStackChanged = 0x00000080,
	eFlushJankData = 0x00000100,
	eCachingHintChanged = 0x00000200,
	eDimmingEnabledChanged = 0x00000400,
	eShadowRadiusChanged = 0x00000800,
	eRenderBorderChanged = 0x00001000,
	eBufferCropChanged = 0x00002000,
	eRelativeLayerChanged = 0x00004000,
	eReparent = 0x00008000,
	eColorChanged = 0x00010000,
	eFrameRateCategoryChanged = 0x00020000,
	eBufferTransformChanged = 0x00040000,
	eTransformToDisplayInverseChanged = 0x00080000,
	eCropChanged = 0x00100000,
	eBufferChanged = 0x00200000,
	eDefaultFrameRateCompatibilityChanged = 0x00400000,
	eDataspaceChanged = 0x00800000,
	eHdrMetadataChanged = 0x01000000,
	eSurfaceDamageRegionChanged = 0x02000000,
	eApiChanged = 0x04000000,
	eSidebandStreamChanged = 0x08000000,
	eColorTransformChanged = 0x10000000,
	eHasListenerCallbacksChanged = 0x20000000,
	eInputInfoChanged = 0x40000000,
	eCornerRadiusChanged = 0x80000000,
	eDestinationFrameChanged = 0x1'00000000,
	/* unused = 0x2'00000000, */
	eBackgroundColorChanged = 0x4'00000000,
	eMetadataChanged = 0x8'00000000,
	eColorSpaceAgnosticChanged = 0x10'00000000,
	eFrameRateSelectionPriority = 0x20'00000000,
	eFrameRateChanged = 0x40'00000000,
	eBackgroundBlurRadiusChanged = 0x80'00000000,
	eProducerDisconnect = 0x100'00000000,
	eFixedTransformHintChanged = 0x200'00000000,
	/* unused 0x400'00000000, */
	eBlurRegionsChanged = 0x800'00000000,
	eAutoRefreshChanged = 0x1000'00000000,
	eStretchChanged = 0x2000'00000000,
	eTrustedOverlayChanged = 0x4000'00000000,
	eDropInputModeChanged = 0x8000'00000000,
	eExtendedRangeBrightnessChanged = 0x10000'00000000,
	};

	layer_state_t();

	void merge(const layer_state_t& other);
	status_t write(Parcel& output) const;
	status_t read(const Parcel& input);
	// Compares two layer_state_t structs and returns a set of change flags describing all the
	// states that are different.
	uint64_t diff(const layer_state_t& other) const;
	bool hasBufferChanges() const;

	// Layer hierarchy updates.
	static constexpr uint64_t HIERARCHY_CHANGES = layer_state_t::eLayerChanged \|
	layer_state_t::eRelativeLayerChanged \| layer_state_t::eReparent \|
	layer_state_t::eLayerStackChanged;

	// Geometry updates.
	static constexpr uint64_t GEOMETRY_CHANGES = layer_state_t::eBufferCropChanged \|
	layer_state_t::eBufferTransformChanged \| layer_state_t::eCornerRadiusChanged \|
	layer_state_t::eCropChanged \| layer_state_t::eDestinationFrameChanged \|
	layer_state_t::eMatrixChanged \| layer_state_t::ePositionChanged \|
	layer_state_t::eTransformToDisplayInverseChanged \|
	layer_state_t::eTransparentRegionChanged;

	// Buffer and related updates.
	static constexpr uint64_t BUFFER_CHANGES = layer_state_t::eApiChanged \|
	layer_state_t::eBufferChanged \| layer_state_t::eBufferCropChanged \|
	layer_state_t::eBufferTransformChanged \| layer_state_t::eDataspaceChanged \|
	layer_state_t::eSidebandStreamChanged \| layer_state_t::eSurfaceDamageRegionChanged \|
	layer_state_t::eTransformToDisplayInverseChanged \|
	layer_state_t::eTransparentRegionChanged \|
	layer_state_t::eExtendedRangeBrightnessChanged;

	// Content updates.
	static constexpr uint64_t CONTENT_CHANGES = layer_state_t::BUFFER_CHANGES \|
	layer_state_t::eAlphaChanged \| layer_state_t::eAutoRefreshChanged \|
	layer_state_t::eBackgroundBlurRadiusChanged \| layer_state_t::eBackgroundColorChanged \|
	layer_state_t::eBlurRegionsChanged \| layer_state_t::eColorChanged \|
	layer_state_t::eColorSpaceAgnosticChanged \| layer_state_t::eColorTransformChanged \|
	layer_state_t::eCornerRadiusChanged \| layer_state_t::eDimmingEnabledChanged \|
	layer_state_t::eHdrMetadataChanged \| layer_state_t::eRenderBorderChanged \|
	layer_state_t::eShadowRadiusChanged \| layer_state_t::eStretchChanged;

	// Changes which invalidates the layer's visible region in CE.
	static constexpr uint64_t CONTENT_DIRTY = layer_state_t::CONTENT_CHANGES \|
	layer_state_t::GEOMETRY_CHANGES \| layer_state_t::HIERARCHY_CHANGES;

	// Changes affecting child states.
	static constexpr uint64_t AFFECTS_CHILDREN = layer_state_t::GEOMETRY_CHANGES \|
	layer_state_t::HIERARCHY_CHANGES \| layer_state_t::eAlphaChanged \|
	layer_state_t::eBackgroundBlurRadiusChanged \| layer_state_t::eBlurRegionsChanged \|
	layer_state_t::eColorTransformChanged \| layer_state_t::eCornerRadiusChanged \|
	layer_state_t::eFlagsChanged \| layer_state_t::eTrustedOverlayChanged \|
	layer_state_t::eFrameRateChanged \| layer_state_t::eFrameRateCategoryChanged \|
	layer_state_t::eFrameRateSelectionPriority \| layer_state_t::eFixedTransformHintChanged;

	// Changes affecting data sent to input.
	static constexpr uint64_t INPUT_CHANGES = layer_state_t::eInputInfoChanged \|
	layer_state_t::eDropInputModeChanged \| layer_state_t::eTrustedOverlayChanged \|
	layer_state_t::eLayerStackChanged;

	// Changes that affect the visible region on a display.
	static constexpr uint64_t VISIBLE_REGION_CHANGES =
	layer_state_t::GEOMETRY_CHANGES \| layer_state_t::HIERARCHY_CHANGES;

	bool hasValidBuffer() const;
	void sanitize(int32_t permissions);

	struct matrix22_t {
	float dsdx{0};
	float dtdx{0};
	float dtdy{0};
	float dsdy{0};
	status_t write(Parcel& output) const;
	status_t read(const Parcel& input);
	inline bool operator==(const matrix22_t& other) const {
	return std::tie(dsdx, dtdx, dtdy, dsdy) ==
	std::tie(other.dsdx, other.dtdx, other.dtdy, other.dsdy);
	}
	inline bool operator!=(const matrix22_t& other) const { return !(*this == other); }
	};
	sp<IBinder> surface;
	int32_t layerId;
	uint64_t what;
	float x;
	float y;
	int32_t z;
	ui::LayerStack layerStack = ui::DEFAULT_LAYER_STACK;
	uint32_t flags;
	uint32_t mask;
	uint8_t reserved;
	matrix22_t matrix;
	float cornerRadius;
	uint32_t backgroundBlurRadius;

	sp<SurfaceControl> relativeLayerSurfaceControl;

	sp<SurfaceControl> parentSurfaceControlForChild;

	half4 color;

	// non POD must be last. see write/read
	Region transparentRegion;
	uint32_t bufferTransform;
	bool transformToDisplayInverse;
	Rect crop;
	std::shared_ptr<BufferData> bufferData = nullptr;
	ui::Dataspace dataspace;
	HdrMetadata hdrMetadata;
	Region surfaceDamageRegion;
	int32_t api;
	sp<NativeHandle> sidebandStream;
	mat4 colorTransform;
	std::vector<BlurRegion> blurRegions;

	sp<gui::WindowInfoHandle> windowInfoHandle = sp<gui::WindowInfoHandle>::make();

	LayerMetadata metadata;

	// The following refer to the alpha, and dataspace, respectively of
	// the background color layer
	half4 bgColor;
	ui::Dataspace bgColorDataspace;

	// A color space agnostic layer means the color of this layer can be
	// interpreted in any color space.
	bool colorSpaceAgnostic;

	std::vector<ListenerCallbacks> listeners;

	// Draws a shadow around the surface.
	float shadowRadius;

	// Priority of the layer assigned by Window Manager.
	int32_t frameRateSelectionPriority;

	// Layer frame rate and compatibility. See ANativeWindow_setFrameRate().
	float frameRate;
	int8_t frameRateCompatibility;
	int8_t changeFrameRateStrategy;

	// Default frame rate compatibility used to set the layer refresh rate votetype.
	int8_t defaultFrameRateCompatibility;

	// Frame rate category to suggest what frame rate range a surface should run.
	int8_t frameRateCategory;

	// Set by window manager indicating the layer and all its children are
	// in a different orientation than the display. The hint suggests that
	// the graphic producers should receive a transform hint as if the
	// display was in this orientation. When the display changes to match
	// the layer orientation, the graphic producer may not need to allocate
	// a buffer of a different size. -1 means the transform hint is not set,
	// otherwise the value will be a valid ui::Rotation.
	ui::Transform::RotationFlags fixedTransformHint;

	// Indicates that the consumer should acquire the next frame as soon as it
	// can and not wait for a frame to become available. This is only relevant
	// in shared buffer mode.
	bool autoRefresh;

	// An inherited state that indicates that this surface control and its children
	// should be trusted for input occlusion detection purposes
	bool isTrustedOverlay;

	// Flag to indicate if border needs to be enabled on the layer
	bool borderEnabled;
	float borderWidth;
	half4 borderColor;

	// Stretch effect to be applied to this layer
	StretchEffect stretchEffect;

	Rect bufferCrop;
	Rect destinationFrame;

	// Force inputflinger to drop all input events for the layer and its children.
	gui::DropInputMode dropInputMode;

	bool dimmingEnabled;
	float currentHdrSdrRatio = 1.f;
	float desiredHdrSdrRatio = 1.f;

	gui::CachingHint cachingHint = gui::CachingHint::Enabled;

	TrustedPresentationThresholds trustedPresentationThresholds;
	TrustedPresentationListener trustedPresentationListener;
	};

	class ComposerState {
	public:
	layer_state_t state;
	status_t write(Parcel& output) const;
	status_t read(const Parcel& input);
	};

	struct DisplayState {
	enum {
	eSurfaceChanged = 0x01,
	eLayerStackChanged = 0x02,
	eDisplayProjectionChanged = 0x04,
	eDisplaySizeChanged = 0x08,
	eFlagsChanged = 0x10
	};

	DisplayState();
	void merge(const DisplayState& other);
	void sanitize(int32_t permissions);

	uint32_t what = 0;
	uint32_t flags = 0;
	sp<IBinder> token;
	sp<IGraphicBufferProducer> surface;

	ui::LayerStack layerStack = ui::DEFAULT_LAYER_STACK;

	// These states define how layers are projected onto the physical display.
	//
	// Layers are first clipped to `layerStackSpaceRect'. They are then translated and
	// scaled from `layerStackSpaceRect' to `orientedDisplaySpaceRect'. Finally, they are rotated
	// according to `orientation', `width', and `height'.
	//
	// For example, assume layerStackSpaceRect is Rect(0, 0, 200, 100), orientedDisplaySpaceRect is
	// Rect(20, 10, 420, 210), and the size of the display is WxH. When orientation is 0, layers
	// will be scaled by a factor of 2 and translated by (20, 10). When orientation is 1, layers
	// will be additionally rotated by 90 degrees around the origin clockwise and translated by (W,
	// 0).
	ui::Rotation orientation = ui::ROTATION_0;
	Rect layerStackSpaceRect = Rect::EMPTY_RECT;
	Rect orientedDisplaySpaceRect = Rect::EMPTY_RECT;

	uint32_t width = 0;
	uint32_t height = 0;

	status_t write(Parcel& output) const;
	status_t read(const Parcel& input);
	};

	struct InputWindowCommands {
	std::vector<gui::FocusRequest> focusRequests;
	std::unordered_set<sp<gui::IWindowInfosReportedListener>,
	SpHash<gui::IWindowInfosReportedListener>>
	windowInfosReportedListeners;

	// Merges the passed in commands and returns true if there were any changes.
	bool merge(const InputWindowCommands& other);
	bool empty() const;
	void clear();
	status_t write(Parcel& output) const;
	status_t read(const Parcel& input);
	};

	static inline int compare_type(const ComposerState& lhs, const ComposerState& rhs) {
	if (lhs.state.surface < rhs.state.surface) return -1;
	if (lhs.state.surface > rhs.state.surface) return 1;
	return 0;
	}

	static inline int compare_type(const DisplayState& lhs, const DisplayState& rhs) {
	return compare_type(lhs.token, rhs.token);
	}

	// Returns true if the frameRate is valid.
	//
	// @param frameRate the frame rate in Hz
	// @param compatibility a ANATIVEWINDOW_FRAME_RATE_COMPATIBILITY_*
	// @param changeFrameRateStrategy a ANATIVEWINDOW_CHANGE_FRAME_RATE_*
	// @param functionName calling function or nullptr. Used for logging
	// @param privileged whether caller has unscoped surfaceflinger access
	bool ValidateFrameRate(float frameRate, int8_t compatibility, int8_t changeFrameRateStrategy,
	const char* functionName, bool privileged = false);

	}; // namespace android

	#endif // ANDROID_SF_LAYER_STATE_H