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* 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#include <stdint.h>
#include <sys/types.h>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <binder/IBinder.h>
#include <utils/RefBase.h>
#include <utils/Singleton.h>
#include <utils/SortedVector.h>
#include <utils/threads.h>
#include <ui/ConfigStoreTypes.h>
#include <ui/DisplayedFrameStats.h>
#include <ui/FrameStats.h>
#include <ui/GraphicTypes.h>
#include <ui/PixelFormat.h>
#include <gui/CpuConsumer.h>
#include <gui/ITransactionCompletedListener.h>
#include <gui/LayerState.h>
#include <gui/SurfaceControl.h>
#include <math/vec3.h>
namespace android {
// ---------------------------------------------------------------------------
struct DisplayInfo;
class HdrCapabilities;
class ISurfaceComposerClient;
class IGraphicBufferProducer;
class Region;
// ---------------------------------------------------------------------------
struct SurfaceControlStats {
SurfaceControlStats(const sp<SurfaceControl>& sc, nsecs_t time,
const sp<Fence>& prevReleaseFence)
: surfaceControl(sc), acquireTime(time), previousReleaseFence(prevReleaseFence) {}
sp<SurfaceControl> surfaceControl;
nsecs_t acquireTime = -1;
sp<Fence> previousReleaseFence;
using TransactionCompletedCallbackTakesContext =
std::function<void(void* /*context*/, nsecs_t /*latchTime*/,
const sp<Fence>& /*presentFence*/,
const std::vector<SurfaceControlStats>& /*stats*/)>;
using TransactionCompletedCallback =
std::function<void(nsecs_t /*latchTime*/, const sp<Fence>& /*presentFence*/,
const std::vector<SurfaceControlStats>& /*stats*/)>;
// ---------------------------------------------------------------------------
class SurfaceComposerClient : public RefBase
friend class Composer;
SurfaceComposerClient(const sp<ISurfaceComposerClient>& client);
virtual ~SurfaceComposerClient();
// Always make sure we could initialize
status_t initCheck() const;
// Return the connection of this client
sp<IBinder> connection() const;
// Forcibly remove connection before all references have gone away.
void dispose();
// callback when the composer is dies
status_t linkToComposerDeath(const sp<IBinder::DeathRecipient>& recipient,
void* cookie = nullptr, uint32_t flags = 0);
// Get a list of supported configurations for a given display
static status_t getDisplayConfigs(const sp<IBinder>& display,
Vector<DisplayInfo>* configs);
// Get the DisplayInfo for the currently-active configuration
static status_t getDisplayInfo(const sp<IBinder>& display,
DisplayInfo* info);
// Get the index of the current active configuration (relative to the list
// returned by getDisplayInfo)
static int getActiveConfig(const sp<IBinder>& display);
// Set a new active configuration using an index relative to the list
// returned by getDisplayInfo
static status_t setActiveConfig(const sp<IBinder>& display, int id);
// Gets the list of supported color modes for the given display
static status_t getDisplayColorModes(const sp<IBinder>& display,
Vector<ui::ColorMode>* outColorModes);
// Get the coordinates of the display's native color primaries
static status_t getDisplayNativePrimaries(const sp<IBinder>& display,
ui::DisplayPrimaries& outPrimaries);
// Gets the active color mode for the given display
static ui::ColorMode getActiveColorMode(const sp<IBinder>& display);
// Sets the active color mode for the given display
static status_t setActiveColorMode(const sp<IBinder>& display,
ui::ColorMode colorMode);
/* Triggers screen on/off or low power mode and waits for it to complete */
static void setDisplayPowerMode(const sp<IBinder>& display, int mode);
/* Returns the composition preference of the default data space and default pixel format,
* as well as the wide color gamut data space and wide color gamut pixel format.
* If the wide color gamut data space is V0_SRGB, then it implies that the platform
* has no wide color gamut support.
static status_t getCompositionPreference(ui::Dataspace* defaultDataspace,
ui::PixelFormat* defaultPixelFormat,
ui::Dataspace* wideColorGamutDataspace,
ui::PixelFormat* wideColorGamutPixelFormat);
* Gets whether SurfaceFlinger can support protected content in GPU composition.
* Requires the ACCESS_SURFACE_FLINGER permission.
static bool getProtectedContentSupport();
* Called from SurfaceControl d'tor to 'destroy' the surface (or rather, reparent it
* to null), but without needing an sp<SurfaceControl> to avoid infinite ressurection.
static void doDropReferenceTransaction(const sp<IBinder>& handle,
const sp<ISurfaceComposerClient>& client);
// Caches a buffer with the ISurfaceComposer so the buffer does not need to be resent across
// processes
static status_t cacheBuffer(const sp<GraphicBuffer>& buffer, int32_t* outBufferId);
// Uncaches a buffer set by cacheBuffer
static status_t uncacheBuffer(int32_t bufferId);
// Queries whether a given display is wide color display.
static status_t isWideColorDisplay(const sp<IBinder>& display, bool* outIsWideColorDisplay);
// ------------------------------------------------------------------------
// surface creation / destruction
static sp<SurfaceComposerClient> getDefault();
//! Create a surface
sp<SurfaceControl> createSurface(const String8& name, // name of the surface
uint32_t w, // width in pixel
uint32_t h, // height in pixel
PixelFormat format, // pixel-format desired
uint32_t flags = 0, // usage flags
SurfaceControl* parent = nullptr, // parent
LayerMetadata metadata = LayerMetadata() // metadata
status_t createSurfaceChecked(const String8& name, // name of the surface
uint32_t w, // width in pixel
uint32_t h, // height in pixel
PixelFormat format, // pixel-format desired
sp<SurfaceControl>* outSurface,
uint32_t flags = 0, // usage flags
SurfaceControl* parent = nullptr, // parent
LayerMetadata metadata = LayerMetadata() // metadata
//! Create a surface
sp<SurfaceControl> createWithSurfaceParent(const String8& name, // name of the surface
uint32_t w, // width in pixel
uint32_t h, // height in pixel
PixelFormat format, // pixel-format desired
uint32_t flags = 0, // usage flags
Surface* parent = nullptr, // parent
LayerMetadata metadata = LayerMetadata() // metadata
//! Create a virtual display
static sp<IBinder> createDisplay(const String8& displayName, bool secure);
//! Destroy a virtual display
static void destroyDisplay(const sp<IBinder>& display);
//! Get stable IDs for connected physical displays
static std::vector<PhysicalDisplayId> getPhysicalDisplayIds();
static std::optional<PhysicalDisplayId> getInternalDisplayId();
//! Get token for a physical display given its stable ID
static sp<IBinder> getPhysicalDisplayToken(PhysicalDisplayId displayId);
static sp<IBinder> getInternalDisplayToken();
static status_t enableVSyncInjections(bool enable);
static status_t injectVSync(nsecs_t when);
struct SCHash {
std::size_t operator()(const sp<SurfaceControl>& sc) const {
return std::hash<SurfaceControl *>{}(sc.get());
struct TCLHash {
std::size_t operator()(const sp<ITransactionCompletedListener>& tcl) const {
return std::hash<IBinder*>{}((tcl) ? IInterface::asBinder(tcl).get() : nullptr);
struct CallbackInfo {
// All the callbacks that have been requested for a TransactionCompletedListener in the
// Transaction
std::unordered_set<CallbackId> callbackIds;
// All the SurfaceControls that have been modified in this TransactionCompletedListener's
// process that require a callback if there is one or more callbackIds set.
std::unordered_set<sp<SurfaceControl>, SCHash> surfaceControls;
class Transaction {
std::unordered_map<sp<SurfaceControl>, ComposerState, SCHash> mComposerStates;
SortedVector<DisplayState > mDisplayStates;
std::unordered_map<sp<ITransactionCompletedListener>, CallbackInfo, TCLHash>
uint32_t mForceSynchronous = 0;
uint32_t mTransactionNestCount = 0;
bool mAnimation = false;
bool mEarlyWakeup = false;
// mDesiredPresentTime is the time in nanoseconds that the client would like the transaction
// to be presented. When it is not possible to present at exactly that time, it will be
// presented after the time has passed.
// Desired present times that are more than 1 second in the future may be ignored.
// When a desired present time has already passed, the transaction will be presented as soon
// as possible.
// Transactions from the same process are presented in the same order that they are applied.
// The desired present time does not affect this ordering.
int64_t mDesiredPresentTime = -1;
InputWindowCommands mInputWindowCommands;
int mStatus = NO_ERROR;
layer_state_t* getLayerState(const sp<SurfaceControl>& sc);
DisplayState& getDisplayState(const sp<IBinder>& token);
void registerSurfaceControlForCallback(const sp<SurfaceControl>& sc);
Transaction() = default;
virtual ~Transaction() = default;
Transaction(Transaction const& other);
status_t apply(bool synchronous = false);
// Merge another transaction in to this one, clearing other
// as if it had been applied.
Transaction& merge(Transaction&& other);
Transaction& show(const sp<SurfaceControl>& sc);
Transaction& hide(const sp<SurfaceControl>& sc);
Transaction& setPosition(const sp<SurfaceControl>& sc,
float x, float y);
Transaction& setSize(const sp<SurfaceControl>& sc,
uint32_t w, uint32_t h);
Transaction& setLayer(const sp<SurfaceControl>& sc,
int32_t z);
// Sets a Z order relative to the Surface specified by "relativeTo" but
// without becoming a full child of the relative. Z-ordering works exactly
// as if it were a child however.
// As a nod to sanity, only non-child surfaces may have a relative Z-order.
// This overrides any previous call and is overriden by any future calls
// to setLayer.
// If the relative is removed, the Surface will have no layer and be
// invisible, until the next time set(Relative)Layer is called.
Transaction& setRelativeLayer(const sp<SurfaceControl>& sc,
const sp<IBinder>& relativeTo, int32_t z);
Transaction& setFlags(const sp<SurfaceControl>& sc,
uint32_t flags, uint32_t mask);
Transaction& setTransparentRegionHint(const sp<SurfaceControl>& sc,
const Region& transparentRegion);
Transaction& setAlpha(const sp<SurfaceControl>& sc,
float alpha);
Transaction& setMatrix(const sp<SurfaceControl>& sc,
float dsdx, float dtdx, float dtdy, float dsdy);
Transaction& setCrop_legacy(const sp<SurfaceControl>& sc, const Rect& crop);
Transaction& setCornerRadius(const sp<SurfaceControl>& sc, float cornerRadius);
Transaction& setLayerStack(const sp<SurfaceControl>& sc, uint32_t layerStack);
Transaction& setMetadata(const sp<SurfaceControl>& sc, uint32_t key,
std::vector<uint8_t> data);
// Defers applying any changes made in this transaction until the Layer
// identified by handle reaches the given frameNumber. If the Layer identified
// by handle is removed, then we will apply this transaction regardless of
// what frame number has been reached.
Transaction& deferTransactionUntil_legacy(const sp<SurfaceControl>& sc,
const sp<IBinder>& handle, uint64_t frameNumber);
// A variant of deferTransactionUntil_legacy which identifies the Layer we wait for by
// Surface instead of Handle. Useful for clients which may not have the
// SurfaceControl for some of their Surfaces. Otherwise behaves identically.
Transaction& deferTransactionUntil_legacy(const sp<SurfaceControl>& sc,
const sp<Surface>& barrierSurface,
uint64_t frameNumber);
// Reparents all children of this layer to the new parent handle.
Transaction& reparentChildren(const sp<SurfaceControl>& sc,
const sp<IBinder>& newParentHandle);
/// Reparents the current layer to the new parent handle. The new parent must not be null.
// This can be used instead of reparentChildren if the caller wants to
// only re-parent a specific child.
Transaction& reparent(const sp<SurfaceControl>& sc,
const sp<IBinder>& newParentHandle);
Transaction& setColor(const sp<SurfaceControl>& sc, const half3& color);
// Sets the alpha of the background color layer if it exists.
Transaction& setColorAlpha(const sp<SurfaceControl>& sc, float alpha);
// Sets the dataspace of the background color layer if it exists.
Transaction& setColorDataspace(const sp<SurfaceControl>& sc, ui::Dataspace dataspace);
Transaction& setTransform(const sp<SurfaceControl>& sc, uint32_t transform);
Transaction& setTransformToDisplayInverse(const sp<SurfaceControl>& sc,
bool transformToDisplayInverse);
Transaction& setCrop(const sp<SurfaceControl>& sc, const Rect& crop);
Transaction& setFrame(const sp<SurfaceControl>& sc, const Rect& frame);
Transaction& setBuffer(const sp<SurfaceControl>& sc, const sp<GraphicBuffer>& buffer);
Transaction& setCachedBuffer(const sp<SurfaceControl>& sc, int32_t bufferId);
Transaction& setAcquireFence(const sp<SurfaceControl>& sc, const sp<Fence>& fence);
Transaction& setDataspace(const sp<SurfaceControl>& sc, ui::Dataspace dataspace);
Transaction& setHdrMetadata(const sp<SurfaceControl>& sc, const HdrMetadata& hdrMetadata);
Transaction& setSurfaceDamageRegion(const sp<SurfaceControl>& sc,
const Region& surfaceDamageRegion);
Transaction& setApi(const sp<SurfaceControl>& sc, int32_t api);
Transaction& setSidebandStream(const sp<SurfaceControl>& sc,
const sp<NativeHandle>& sidebandStream);
Transaction& setDesiredPresentTime(nsecs_t desiredPresentTime);
Transaction& addTransactionCompletedCallback(
TransactionCompletedCallbackTakesContext callback, void* callbackContext);
// Detaches all child surfaces (and their children recursively)
// from their SurfaceControl.
// The child SurfaceControls will not throw exceptions or return errors,
// but transactions will have no effect.
// The child surfaces will continue to follow their parent surfaces,
// and remain eligible for rendering, but their relative state will be
// frozen. We use this in the WindowManager, in app shutdown/relaunch
// scenarios, where the app would otherwise clean up its child Surfaces.
// Sometimes the WindowManager needs to extend their lifetime slightly
// in order to perform an exit animation or prevent flicker.
Transaction& detachChildren(const sp<SurfaceControl>& sc);
// Set an override scaling mode as documented in <system/window.h>
// the override scaling mode will take precedence over any client
// specified scaling mode. -1 will clear the override scaling mode.
Transaction& setOverrideScalingMode(const sp<SurfaceControl>& sc,
int32_t overrideScalingMode);
// If the size changes in this transaction, all geometry updates specified
// in this transaction will not complete until a buffer of the new size
// arrives. As some elements normally apply immediately, this enables
// freezing the total geometry of a surface until a resize is completed.
Transaction& setGeometryAppliesWithResize(const sp<SurfaceControl>& sc);
#ifndef NO_INPUT
Transaction& setInputWindowInfo(const sp<SurfaceControl>& sc, const InputWindowInfo& info);
Transaction& transferTouchFocus(const sp<IBinder>& fromToken, const sp<IBinder>& toToken);
// Set a color transform matrix on the given layer on the built-in display.
Transaction& setColorTransform(const sp<SurfaceControl>& sc, const mat3& matrix,
const vec3& translation);
Transaction& setGeometry(const sp<SurfaceControl>& sc,
const Rect& source, const Rect& dst, int transform);
status_t setDisplaySurface(const sp<IBinder>& token,
const sp<IGraphicBufferProducer>& bufferProducer);
void setDisplayLayerStack(const sp<IBinder>& token, uint32_t layerStack);
/* setDisplayProjection() defines the projection of layer stacks
* to a given display.
* - orientation defines the display's orientation.
* - layerStackRect defines which area of the window manager coordinate
* space will be used.
* - displayRect defines where on the display will layerStackRect be
* mapped to. displayRect is specified post-orientation, that is
* it uses the orientation seen by the end-user.
void setDisplayProjection(const sp<IBinder>& token,
uint32_t orientation,
const Rect& layerStackRect,
const Rect& displayRect);
void setDisplaySize(const sp<IBinder>& token, uint32_t width, uint32_t height);
void setAnimationTransaction();
void setEarlyWakeup();
status_t clearLayerFrameStats(const sp<IBinder>& token) const;
status_t getLayerFrameStats(const sp<IBinder>& token, FrameStats* outStats) const;
static status_t clearAnimationFrameStats();
static status_t getAnimationFrameStats(FrameStats* outStats);
static status_t getHdrCapabilities(const sp<IBinder>& display,
HdrCapabilities* outCapabilities);
static void setDisplayProjection(const sp<IBinder>& token,
uint32_t orientation,
const Rect& layerStackRect,
const Rect& displayRect);
inline sp<ISurfaceComposerClient> getClient() { return mClient; }
static status_t getDisplayedContentSamplingAttributes(const sp<IBinder>& display,
ui::PixelFormat* outFormat,
ui::Dataspace* outDataspace,
uint8_t* outComponentMask);
static status_t setDisplayContentSamplingEnabled(const sp<IBinder>& display, bool enable,
uint8_t componentMask, uint64_t maxFrames);
static status_t getDisplayedContentSample(const sp<IBinder>& display, uint64_t maxFrames,
uint64_t timestamp, DisplayedFrameStats* outStats);
virtual void onFirstRef();
mutable Mutex mLock;
status_t mStatus;
sp<ISurfaceComposerClient> mClient;
// ---------------------------------------------------------------------------
class ScreenshotClient {
// if cropping isn't required, callers may pass in a default Rect, e.g.:
// capture(display, producer, Rect(), reqWidth, ...);
static status_t capture(const sp<IBinder>& display, const ui::Dataspace reqDataSpace,
const ui::PixelFormat reqPixelFormat, Rect sourceCrop,
uint32_t reqWidth, uint32_t reqHeight, bool useIdentityTransform,
uint32_t rotation, sp<GraphicBuffer>* outBuffer);
static status_t captureLayers(const sp<IBinder>& layerHandle, const ui::Dataspace reqDataSpace,
const ui::PixelFormat reqPixelFormat, Rect sourceCrop,
float frameScale, sp<GraphicBuffer>* outBuffer);
static status_t captureChildLayers(const sp<IBinder>& layerHandle,
const ui::Dataspace reqDataSpace,
const ui::PixelFormat reqPixelFormat, Rect sourceCrop,
float frameScale, sp<GraphicBuffer>* outBuffer);
// ---------------------------------------------------------------------------
class TransactionCompletedListener : public BnTransactionCompletedListener {
CallbackId getNextIdLocked() REQUIRES(mMutex);
std::mutex mMutex;
bool mListening GUARDED_BY(mMutex) = false;
CallbackId mCallbackIdCounter GUARDED_BY(mMutex) = 1;
struct IBinderHash {
std::size_t operator()(const sp<IBinder>& iBinder) const {
return std::hash<IBinder*>{}(iBinder.get());
struct CallbackTranslation {
TransactionCompletedCallback callbackFunction;
std::unordered_map<sp<IBinder>, sp<SurfaceControl>, IBinderHash> surfaceControls;
std::unordered_map<CallbackId, CallbackTranslation> mCallbacks GUARDED_BY(mMutex);
static sp<TransactionCompletedListener> getInstance();
static sp<ITransactionCompletedListener> getIInstance();
void startListeningLocked() REQUIRES(mMutex);
CallbackId addCallbackFunction(
const TransactionCompletedCallback& callbackFunction,
const std::unordered_set<sp<SurfaceControl>, SurfaceComposerClient::SCHash>&
void addSurfaceControlToCallbacks(const sp<SurfaceControl>& surfaceControl,
const std::unordered_set<CallbackId>& callbackIds);
// Overrides BnTransactionCompletedListener's onTransactionCompleted
void onTransactionCompleted(ListenerStats stats) override;
// ---------------------------------------------------------------------------
}; // namespace android