services/surfaceflinger/DisplayDevice.h - android_frameworks_native - Gitiles

 /*
  * Copyright (C) 2007 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 <memory>
 #include <optional>
 #include <string>
 #include <unordered_map>

 #include <android/native_window.h>
 #include <binder/IBinder.h>
 #include <gui/LayerState.h>
 #include <math/mat4.h>
 #include <renderengine/RenderEngine.h>
 #include <system/window.h>
 #include <ui/DisplayInfo.h>
 #include <ui/DisplayState.h>
 #include <ui/GraphicTypes.h>
 #include <ui/HdrCapabilities.h>
 #include <ui/Region.h>
 #include <ui/Transform.h>
 #include <utils/Mutex.h>
 #include <utils/RefBase.h>
 #include <utils/Timers.h>

 #include "DisplayHardware/DisplayIdentification.h"
 #include "DisplayHardware/Hal.h"
 #include "DisplayHardware/PowerAdvisor.h"
 #include "RenderArea.h"
 #include "Scheduler/HwcStrongTypes.h"

 namespace android {

 class Fence;
 class HWComposer;
 class IGraphicBufferProducer;
 class Layer;
 class SurfaceFlinger;

 struct CompositionInfo;
 struct DisplayDeviceCreationArgs;

 namespace compositionengine {
 class Display;
 class DisplaySurface;
 } // namespace compositionengine

 class DisplayDevice : public LightRefBase<DisplayDevice> {
 public:
     constexpr static float sDefaultMinLumiance = 0.0;
     constexpr static float sDefaultMaxLumiance = 500.0;

     explicit DisplayDevice(DisplayDeviceCreationArgs& args);
     virtual ~DisplayDevice();

     std::shared_ptr<compositionengine::Display> getCompositionDisplay() const {
         return mCompositionDisplay;
     }

     std::optional<DisplayConnectionType> getConnectionType() const { return mConnectionType; }

     bool isVirtual() const { return !mConnectionType; }
     bool isPrimary() const { return mIsPrimary; }

     // isSecure indicates whether this display can be trusted to display
     // secure surfaces.
     bool isSecure() const;

     int getWidth() const;
     int getHeight() const;
     ui::Size getSize() const { return {getWidth(), getHeight()}; }

     void setLayerStack(ui::LayerStack);
     void setDisplaySize(int width, int height);
     void setProjection(ui::Rotation orientation, Rect viewport, Rect frame);

     ui::Rotation getPhysicalOrientation() const { return mPhysicalOrientation; }
     ui::Rotation getOrientation() const { return mOrientation; }

     static ui::Transform::RotationFlags getPrimaryDisplayRotationFlags();

     ui::Transform::RotationFlags getTransformHint() const {
         return static_cast<ui::Transform::RotationFlags>(getTransform().getOrientation());
     }

     const ui::Transform& getTransform() const;
     const Rect& getViewport() const;
     const Rect& getFrame() const;
     const Rect& getSourceClip() const;
     bool needsFiltering() const;
     ui::LayerStack getLayerStack() const;

     const std::optional<DisplayId>& getId() const;
     const wp<IBinder>& getDisplayToken() const { return mDisplayToken; }
     int32_t getSequenceId() const { return mSequenceId; }

     const Region& getUndefinedRegion() const;

     int32_t getSupportedPerFrameMetadata() const;

     bool hasWideColorGamut() const;
     // Whether h/w composer has native support for specific HDR type.
     bool hasHDR10PlusSupport() const;
     bool hasHDR10Support() const;
     bool hasHLGSupport() const;
     bool hasDolbyVisionSupport() const;

     // The returned HdrCapabilities is the combination of HDR capabilities from
     // hardware composer and RenderEngine. When the DisplayDevice supports wide
     // color gamut, RenderEngine is able to simulate HDR support in Display P3
     // color space for both PQ and HLG HDR contents. The minimum and maximum
     // luminance will be set to sDefaultMinLumiance and sDefaultMaxLumiance
     // respectively if hardware composer doesn't return meaningful values.
     const HdrCapabilities& getHdrCapabilities() const;

     // Return true if intent is supported by the display.
     bool hasRenderIntent(ui::RenderIntent intent) const;

     const Rect& getBounds() const;
     const Rect& bounds() const { return getBounds(); }

     void setDisplayName(const std::string& displayName);
     const std::string& getDisplayName() const { return mDisplayName; }

     /* ------------------------------------------------------------------------
      * Display power mode management.
      */
     hardware::graphics::composer::hal::PowerMode getPowerMode() const;
     void setPowerMode(hardware::graphics::composer::hal::PowerMode mode);
     bool isPoweredOn() const;

     ui::Dataspace getCompositionDataSpace() const;

     /* ------------------------------------------------------------------------
      * Display active config management.
      */
     HwcConfigIndexType getActiveConfig() const;
     void setActiveConfig(HwcConfigIndexType mode);

     // release HWC resources (if any) for removable displays
     void disconnect();

     /* ------------------------------------------------------------------------
      * Debugging
      */
     uint32_t getPageFlipCount() const;
     std::string getDebugName() const;
     void dump(std::string& result) const;

 private:
     const sp<SurfaceFlinger> mFlinger;
     const wp<IBinder> mDisplayToken;
     const int32_t mSequenceId;
     const std::optional<DisplayConnectionType> mConnectionType;

     const std::shared_ptr<compositionengine::Display> mCompositionDisplay;

     std::string mDisplayName;

     const ui::Rotation mPhysicalOrientation;
     ui::Rotation mOrientation = ui::ROTATION_0;

     static ui::Transform::RotationFlags sPrimaryDisplayRotationFlags;

     hardware::graphics::composer::hal::PowerMode mPowerMode =
             hardware::graphics::composer::hal::PowerMode::OFF;
     HwcConfigIndexType mActiveConfig;

     // TODO(b/74619554): Remove special cases for primary display.
     const bool mIsPrimary;
 };

 struct DisplayDeviceState {
     struct Physical {
         DisplayId id;
         DisplayConnectionType type;
         hardware::graphics::composer::hal::HWDisplayId hwcDisplayId;

         bool operator==(const Physical& other) const {
             return id == other.id && type == other.type && hwcDisplayId == other.hwcDisplayId;
         }
     };

     bool isVirtual() const { return !physical; }

     int32_t sequenceId = sNextSequenceId++;
     std::optional<Physical> physical;
     sp<IGraphicBufferProducer> surface;
     ui::LayerStack layerStack = ui::NO_LAYER_STACK;
     Rect viewport;
     Rect frame;
     ui::Rotation orientation = ui::ROTATION_0;
     uint32_t width = 0;
     uint32_t height = 0;
     std::string displayName;
     bool isSecure = false;

 private:
     static std::atomic<int32_t> sNextSequenceId;
 };

 struct DisplayDeviceCreationArgs {
     // We use a constructor to ensure some of the values are set, without
     // assuming a default value.
     DisplayDeviceCreationArgs(const sp<SurfaceFlinger>&, const wp<IBinder>& displayToken,
                               std::shared_ptr<compositionengine::Display>);
     const sp<SurfaceFlinger> flinger;
     const wp<IBinder> displayToken;
     const std::shared_ptr<compositionengine::Display> compositionDisplay;

     int32_t sequenceId{0};
     std::optional<DisplayConnectionType> connectionType;
     bool isSecure{false};
     sp<ANativeWindow> nativeWindow;
     sp<compositionengine::DisplaySurface> displaySurface;
     ui::Rotation physicalOrientation{ui::ROTATION_0};
     bool hasWideColorGamut{false};
     HdrCapabilities hdrCapabilities;
     int32_t supportedPerFrameMetadata{0};
     std::unordered_map<ui::ColorMode, std::vector<ui::RenderIntent>> hwcColorModes;
     hardware::graphics::composer::hal::PowerMode initialPowerMode{
             hardware::graphics::composer::hal::PowerMode::ON};
     bool isPrimary{false};
 };

 class DisplayRenderArea : public RenderArea {
 public:
     DisplayRenderArea(const sp<const DisplayDevice>& display,
                       RotationFlags rotation = ui::Transform::ROT_0)
           : DisplayRenderArea(display, display->getBounds(),
                               static_cast<uint32_t>(display->getWidth()),
                               static_cast<uint32_t>(display->getHeight()),
                               display->getCompositionDataSpace(), rotation) {}

     DisplayRenderArea(sp<const DisplayDevice> display, const Rect& sourceCrop, uint32_t reqWidth,
                       uint32_t reqHeight, ui::Dataspace reqDataSpace, RotationFlags rotation,
                       bool allowSecureLayers = true)
           : RenderArea(reqWidth, reqHeight, CaptureFill::OPAQUE, reqDataSpace,
                        display->getViewport(), applyDeviceOrientation(rotation, display)),
             mDisplay(std::move(display)),
             mSourceCrop(sourceCrop),
             mAllowSecureLayers(allowSecureLayers) {}

     const ui::Transform& getTransform() const override { return mTransform; }
     Rect getBounds() const override { return mDisplay->getBounds(); }
     int getHeight() const override { return mDisplay->getHeight(); }
     int getWidth() const override { return mDisplay->getWidth(); }
     bool isSecure() const override { return mAllowSecureLayers && mDisplay->isSecure(); }
     sp<const DisplayDevice> getDisplayDevice() const override { return mDisplay; }

     bool needsFiltering() const override {
         // check if the projection from the logical render area
         // to the physical render area requires filtering
         const Rect& sourceCrop = getSourceCrop();
         int width = sourceCrop.width();
         int height = sourceCrop.height();
         if (getRotationFlags() & ui::Transform::ROT_90) {
             std::swap(width, height);
         }
         return width != getReqWidth() || height != getReqHeight();
     }

     Rect getSourceCrop() const override {
         // use the projected display viewport by default.
         if (mSourceCrop.isEmpty()) {
             return mDisplay->getSourceClip();
         }

         // If there is a source crop provided then it is assumed that the device
         // was in portrait orientation. This may not logically be true, so
         // correct for the orientation error by undoing the rotation

         ui::Rotation logicalOrientation = mDisplay->getOrientation();
         if (logicalOrientation == ui::Rotation::Rotation90) {
             logicalOrientation = ui::Rotation::Rotation270;
         } else if (logicalOrientation == ui::Rotation::Rotation270) {
             logicalOrientation = ui::Rotation::Rotation90;
         }

         const auto flags = ui::Transform::toRotationFlags(logicalOrientation);
         int width = mDisplay->getSourceClip().getWidth();
         int height = mDisplay->getSourceClip().getHeight();
         ui::Transform rotation;
         rotation.set(flags, width, height);
         return rotation.transform(mSourceCrop);
     }

 private:
     static RotationFlags applyDeviceOrientation(RotationFlags orientationFlag,
                                                 const sp<const DisplayDevice>& device) {
         uint32_t inverseRotate90 = 0;
         uint32_t inverseReflect = 0;

         // Reverse the logical orientation.
         ui::Rotation logicalOrientation = device->getOrientation();
         if (logicalOrientation == ui::Rotation::Rotation90) {
             logicalOrientation = ui::Rotation::Rotation270;
         } else if (logicalOrientation == ui::Rotation::Rotation270) {
             logicalOrientation = ui::Rotation::Rotation90;
         }

         const ui::Rotation orientation = logicalOrientation;

         switch (orientation) {
             case ui::ROTATION_0:
                 return orientationFlag;

             case ui::ROTATION_90:
                 inverseRotate90 = ui::Transform::ROT_90;
                 inverseReflect = ui::Transform::ROT_180;
                 break;

             case ui::ROTATION_180:
                 inverseReflect = ui::Transform::ROT_180;
                 break;

             case ui::ROTATION_270:
                 inverseRotate90 = ui::Transform::ROT_90;
                 break;
         }

         const uint32_t rotate90 = orientationFlag & ui::Transform::ROT_90;
         uint32_t reflect = orientationFlag & ui::Transform::ROT_180;

         // Apply reflection for double rotation.
         if (rotate90 & inverseRotate90) {
             reflect = ~reflect & ui::Transform::ROT_180;
         }

         return static_cast<RotationFlags>((rotate90 ^ inverseRotate90) |
                                           (reflect ^ inverseReflect));
     }

     const sp<const DisplayDevice> mDisplay;
     const Rect mSourceCrop;
     const bool mAllowSecureLayers;
     const ui::Transform mTransform = ui::Transform();
 };

 } // namespace android
	/*
	* Copyright (C) 2007 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 <memory>
	#include <optional>
	#include <string>
	#include <unordered_map>

	#include <android/native_window.h>
	#include <binder/IBinder.h>
	#include <gui/LayerState.h>
	#include <math/mat4.h>
	#include <renderengine/RenderEngine.h>
	#include <system/window.h>
	#include <ui/DisplayInfo.h>
	#include <ui/DisplayState.h>
	#include <ui/GraphicTypes.h>
	#include <ui/HdrCapabilities.h>
	#include <ui/Region.h>
	#include <ui/Transform.h>
	#include <utils/Mutex.h>
	#include <utils/RefBase.h>
	#include <utils/Timers.h>

	#include "DisplayHardware/DisplayIdentification.h"
	#include "DisplayHardware/Hal.h"
	#include "DisplayHardware/PowerAdvisor.h"
	#include "RenderArea.h"
	#include "Scheduler/HwcStrongTypes.h"

	namespace android {

	class Fence;
	class HWComposer;
	class IGraphicBufferProducer;
	class Layer;
	class SurfaceFlinger;

	struct CompositionInfo;
	struct DisplayDeviceCreationArgs;

	namespace compositionengine {
	class Display;
	class DisplaySurface;
	} // namespace compositionengine

	class DisplayDevice : public LightRefBase<DisplayDevice> {
	public:
	constexpr static float sDefaultMinLumiance = 0.0;
	constexpr static float sDefaultMaxLumiance = 500.0;

	explicit DisplayDevice(DisplayDeviceCreationArgs& args);
	virtual ~DisplayDevice();

	std::shared_ptr<compositionengine::Display> getCompositionDisplay() const {
	return mCompositionDisplay;
	}

	std::optional<DisplayConnectionType> getConnectionType() const { return mConnectionType; }

	bool isVirtual() const { return !mConnectionType; }
	bool isPrimary() const { return mIsPrimary; }

	// isSecure indicates whether this display can be trusted to display
	// secure surfaces.
	bool isSecure() const;

	int getWidth() const;
	int getHeight() const;
	ui::Size getSize() const { return {getWidth(), getHeight()}; }

	void setLayerStack(ui::LayerStack);
	void setDisplaySize(int width, int height);
	void setProjection(ui::Rotation orientation, Rect viewport, Rect frame);

	ui::Rotation getPhysicalOrientation() const { return mPhysicalOrientation; }
	ui::Rotation getOrientation() const { return mOrientation; }

	static ui::Transform::RotationFlags getPrimaryDisplayRotationFlags();

	ui::Transform::RotationFlags getTransformHint() const {
	return static_cast<ui::Transform::RotationFlags>(getTransform().getOrientation());
	}

	const ui::Transform& getTransform() const;
	const Rect& getViewport() const;
	const Rect& getFrame() const;
	const Rect& getSourceClip() const;
	bool needsFiltering() const;
	ui::LayerStack getLayerStack() const;

	const std::optional<DisplayId>& getId() const;
	const wp<IBinder>& getDisplayToken() const { return mDisplayToken; }
	int32_t getSequenceId() const { return mSequenceId; }

	const Region& getUndefinedRegion() const;

	int32_t getSupportedPerFrameMetadata() const;

	bool hasWideColorGamut() const;
	// Whether h/w composer has native support for specific HDR type.
	bool hasHDR10PlusSupport() const;
	bool hasHDR10Support() const;
	bool hasHLGSupport() const;
	bool hasDolbyVisionSupport() const;

	// The returned HdrCapabilities is the combination of HDR capabilities from
	// hardware composer and RenderEngine. When the DisplayDevice supports wide
	// color gamut, RenderEngine is able to simulate HDR support in Display P3
	// color space for both PQ and HLG HDR contents. The minimum and maximum
	// luminance will be set to sDefaultMinLumiance and sDefaultMaxLumiance
	// respectively if hardware composer doesn't return meaningful values.
	const HdrCapabilities& getHdrCapabilities() const;

	// Return true if intent is supported by the display.
	bool hasRenderIntent(ui::RenderIntent intent) const;

	const Rect& getBounds() const;
	const Rect& bounds() const { return getBounds(); }

	void setDisplayName(const std::string& displayName);
	const std::string& getDisplayName() const { return mDisplayName; }

	/* ------------------------------------------------------------------------
	* Display power mode management.
	*/
	hardware::graphics::composer::hal::PowerMode getPowerMode() const;
	void setPowerMode(hardware::graphics::composer::hal::PowerMode mode);
	bool isPoweredOn() const;

	ui::Dataspace getCompositionDataSpace() const;

	/* ------------------------------------------------------------------------
	* Display active config management.
	*/
	HwcConfigIndexType getActiveConfig() const;
	void setActiveConfig(HwcConfigIndexType mode);

	// release HWC resources (if any) for removable displays
	void disconnect();

	/* ------------------------------------------------------------------------
	* Debugging
	*/
	uint32_t getPageFlipCount() const;
	std::string getDebugName() const;
	void dump(std::string& result) const;

	private:
	const sp<SurfaceFlinger> mFlinger;
	const wp<IBinder> mDisplayToken;
	const int32_t mSequenceId;
	const std::optional<DisplayConnectionType> mConnectionType;

	const std::shared_ptr<compositionengine::Display> mCompositionDisplay;

	std::string mDisplayName;

	const ui::Rotation mPhysicalOrientation;
	ui::Rotation mOrientation = ui::ROTATION_0;

	static ui::Transform::RotationFlags sPrimaryDisplayRotationFlags;

	hardware::graphics::composer::hal::PowerMode mPowerMode =
	hardware::graphics::composer::hal::PowerMode::OFF;
	HwcConfigIndexType mActiveConfig;

	// TODO(b/74619554): Remove special cases for primary display.
	const bool mIsPrimary;
	};

	struct DisplayDeviceState {
	struct Physical {
	DisplayId id;
	DisplayConnectionType type;
	hardware::graphics::composer::hal::HWDisplayId hwcDisplayId;

	bool operator==(const Physical& other) const {
	return id == other.id && type == other.type && hwcDisplayId == other.hwcDisplayId;
	}
	};

	bool isVirtual() const { return !physical; }

	int32_t sequenceId = sNextSequenceId++;
	std::optional<Physical> physical;
	sp<IGraphicBufferProducer> surface;
	ui::LayerStack layerStack = ui::NO_LAYER_STACK;
	Rect viewport;
	Rect frame;
	ui::Rotation orientation = ui::ROTATION_0;
	uint32_t width = 0;
	uint32_t height = 0;
	std::string displayName;
	bool isSecure = false;

	private:
	static std::atomic<int32_t> sNextSequenceId;
	};

	struct DisplayDeviceCreationArgs {
	// We use a constructor to ensure some of the values are set, without
	// assuming a default value.
	DisplayDeviceCreationArgs(const sp<SurfaceFlinger>&, const wp<IBinder>& displayToken,
	std::shared_ptr<compositionengine::Display>);
	const sp<SurfaceFlinger> flinger;
	const wp<IBinder> displayToken;
	const std::shared_ptr<compositionengine::Display> compositionDisplay;

	int32_t sequenceId{0};
	std::optional<DisplayConnectionType> connectionType;
	bool isSecure{false};
	sp<ANativeWindow> nativeWindow;
	sp<compositionengine::DisplaySurface> displaySurface;
	ui::Rotation physicalOrientation{ui::ROTATION_0};
	bool hasWideColorGamut{false};
	HdrCapabilities hdrCapabilities;
	int32_t supportedPerFrameMetadata{0};
	std::unordered_map<ui::ColorMode, std::vector<ui::RenderIntent>> hwcColorModes;
	hardware::graphics::composer::hal::PowerMode initialPowerMode{
	hardware::graphics::composer::hal::PowerMode::ON};
	bool isPrimary{false};
	};

	class DisplayRenderArea : public RenderArea {
	public:
	DisplayRenderArea(const sp<const DisplayDevice>& display,
	RotationFlags rotation = ui::Transform::ROT_0)
	: DisplayRenderArea(display, display->getBounds(),
	static_cast<uint32_t>(display->getWidth()),
	static_cast<uint32_t>(display->getHeight()),
	display->getCompositionDataSpace(), rotation) {}

	DisplayRenderArea(sp<const DisplayDevice> display, const Rect& sourceCrop, uint32_t reqWidth,
	uint32_t reqHeight, ui::Dataspace reqDataSpace, RotationFlags rotation,
	bool allowSecureLayers = true)
	: RenderArea(reqWidth, reqHeight, CaptureFill::OPAQUE, reqDataSpace,
	display->getViewport(), applyDeviceOrientation(rotation, display)),
	mDisplay(std::move(display)),
	mSourceCrop(sourceCrop),
	mAllowSecureLayers(allowSecureLayers) {}

	const ui::Transform& getTransform() const override { return mTransform; }
	Rect getBounds() const override { return mDisplay->getBounds(); }
	int getHeight() const override { return mDisplay->getHeight(); }
	int getWidth() const override { return mDisplay->getWidth(); }
	bool isSecure() const override { return mAllowSecureLayers && mDisplay->isSecure(); }
	sp<const DisplayDevice> getDisplayDevice() const override { return mDisplay; }

	bool needsFiltering() const override {
	// check if the projection from the logical render area
	// to the physical render area requires filtering
	const Rect& sourceCrop = getSourceCrop();
	int width = sourceCrop.width();
	int height = sourceCrop.height();
	if (getRotationFlags() & ui::Transform::ROT_90) {
	std::swap(width, height);
	}
	return width != getReqWidth() \|\| height != getReqHeight();
	}

	Rect getSourceCrop() const override {
	// use the projected display viewport by default.
	if (mSourceCrop.isEmpty()) {
	return mDisplay->getSourceClip();
	}

	// If there is a source crop provided then it is assumed that the device
	// was in portrait orientation. This may not logically be true, so
	// correct for the orientation error by undoing the rotation

	ui::Rotation logicalOrientation = mDisplay->getOrientation();
	if (logicalOrientation == ui::Rotation::Rotation90) {
	logicalOrientation = ui::Rotation::Rotation270;
	} else if (logicalOrientation == ui::Rotation::Rotation270) {
	logicalOrientation = ui::Rotation::Rotation90;
	}

	const auto flags = ui::Transform::toRotationFlags(logicalOrientation);
	int width = mDisplay->getSourceClip().getWidth();
	int height = mDisplay->getSourceClip().getHeight();
	ui::Transform rotation;
	rotation.set(flags, width, height);
	return rotation.transform(mSourceCrop);
	}

	private:
	static RotationFlags applyDeviceOrientation(RotationFlags orientationFlag,
	const sp<const DisplayDevice>& device) {
	uint32_t inverseRotate90 = 0;
	uint32_t inverseReflect = 0;

	// Reverse the logical orientation.
	ui::Rotation logicalOrientation = device->getOrientation();
	if (logicalOrientation == ui::Rotation::Rotation90) {
	logicalOrientation = ui::Rotation::Rotation270;
	} else if (logicalOrientation == ui::Rotation::Rotation270) {
	logicalOrientation = ui::Rotation::Rotation90;
	}

	const ui::Rotation orientation = logicalOrientation;

	switch (orientation) {
	case ui::ROTATION_0:
	return orientationFlag;

	case ui::ROTATION_90:
	inverseRotate90 = ui::Transform::ROT_90;
	inverseReflect = ui::Transform::ROT_180;
	break;

	case ui::ROTATION_180:
	inverseReflect = ui::Transform::ROT_180;
	break;

	case ui::ROTATION_270:
	inverseRotate90 = ui::Transform::ROT_90;
	break;
	}

	const uint32_t rotate90 = orientationFlag & ui::Transform::ROT_90;
	uint32_t reflect = orientationFlag & ui::Transform::ROT_180;

	// Apply reflection for double rotation.
	if (rotate90 & inverseRotate90) {
	reflect = ~reflect & ui::Transform::ROT_180;
	}

	return static_cast<RotationFlags>((rotate90 ^ inverseRotate90) \|
	(reflect ^ inverseReflect));
	}

	const sp<const DisplayDevice> mDisplay;
	const Rect mSourceCrop;
	const bool mAllowSecureLayers;
	const ui::Transform mTransform = ui::Transform();
	};

	} // namespace android