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replicant-frameworks_native/services/surfaceflinger/SurfaceFlinger.h
Mathias Agopian 1b0b30d043 add support for [1974164] Be able to take a screen shot on the device 
screenshots are taken using ISurfaceComposer::captureScreen() which returns
the size of the screenshot and an IMemoryHeap containing the data.
screenshots have limitations:
- they will always fail if a secure window is up on screen
- require GL_OES_framebuffer_object extension
- in some situation, video planes won't been captured

Change-Id: I741c68a2d2984fb139039301c3349e6780e2cd58
2010-09-24 14:56:39 -07:00

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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
*
* 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_SURFACE_FLINGER_H
#define ANDROID_SURFACE_FLINGER_H
#include <stdint.h>
#include <sys/types.h>
#include <utils/SortedVector.h>
#include <utils/KeyedVector.h>
#include <utils/threads.h>
#include <utils/Atomic.h>
#include <utils/Errors.h>
#include <utils/RefBase.h>
#include <binder/IMemory.h>
#include <binder/Permission.h>
#include <binder/BinderService.h>
#include <ui/PixelFormat.h>
#include <surfaceflinger/ISurfaceComposer.h>
#include <surfaceflinger/ISurfaceComposerClient.h>
#include "Barrier.h"
#include "Layer.h"
#include "MessageQueue.h"
namespace android {
// ---------------------------------------------------------------------------
class Client;
class DisplayHardware;
class FreezeLock;
class Layer;
class LayerBlur;
class LayerDim;
class LayerBuffer;
#define LIKELY( exp ) (__builtin_expect( (exp) != 0, true ))
#define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false ))
// ---------------------------------------------------------------------------
class Client : public BnSurfaceComposerClient
{
public:
Client(const sp<SurfaceFlinger>& flinger);
~Client();
status_t initCheck() const;
// protected by SurfaceFlinger::mStateLock
ssize_t attachLayer(const sp<LayerBaseClient>& layer);
void detachLayer(const LayerBaseClient* layer);
sp<LayerBaseClient> getLayerUser(int32_t i) const;
private:
// ISurfaceComposerClient interface
virtual sp<IMemoryHeap> getControlBlock() const;
virtual ssize_t getTokenForSurface(const sp<ISurface>& sur) const;
virtual sp<ISurface> createSurface(
surface_data_t* params, int pid, const String8& name,
DisplayID display, uint32_t w, uint32_t h,PixelFormat format,
uint32_t flags);
virtual status_t destroySurface(SurfaceID surfaceId);
virtual status_t setState(int32_t count, const layer_state_t* states);
DefaultKeyedVector< size_t, wp<LayerBaseClient> > mLayers;
sp<SurfaceFlinger> mFlinger;
int32_t mNameGenerator;
};
class UserClient : public BnSurfaceComposerClient
{
public:
// pointer to this client's control block
SharedClient* ctrlblk;
public:
UserClient(const sp<SurfaceFlinger>& flinger);
~UserClient();
status_t initCheck() const;
// protected by SurfaceFlinger::mStateLock
void detachLayer(const Layer* layer);
private:
// ISurfaceComposerClient interface
virtual sp<IMemoryHeap> getControlBlock() const;
virtual ssize_t getTokenForSurface(const sp<ISurface>& sur) const;
virtual sp<ISurface> createSurface(
surface_data_t* params, int pid, const String8& name,
DisplayID display, uint32_t w, uint32_t h,PixelFormat format,
uint32_t flags);
virtual status_t destroySurface(SurfaceID surfaceId);
virtual status_t setState(int32_t count, const layer_state_t* states);
// atomic-ops
mutable volatile int32_t mBitmap;
sp<IMemoryHeap> mCblkHeap;
sp<SurfaceFlinger> mFlinger;
};
// ---------------------------------------------------------------------------
class GraphicPlane
{
public:
static status_t orientationToTransfrom(int orientation, int w, int h,
Transform* tr);
GraphicPlane();
~GraphicPlane();
bool initialized() const;
void setDisplayHardware(DisplayHardware *);
status_t setOrientation(int orientation);
int getOrientation() const { return mOrientation; }
int getWidth() const;
int getHeight() const;
const DisplayHardware& displayHardware() const;
const Transform& transform() const;
EGLDisplay getEGLDisplay() const;
private:
GraphicPlane(const GraphicPlane&);
GraphicPlane operator = (const GraphicPlane&);
DisplayHardware* mHw;
Transform mGlobalTransform;
Transform mDisplayTransform;
int mOrientation;
float mDisplayWidth;
float mDisplayHeight;
int mWidth;
int mHeight;
};
// ---------------------------------------------------------------------------
enum {
eTransactionNeeded = 0x01,
eTraversalNeeded = 0x02
};
class SurfaceFlinger :
public BinderService<SurfaceFlinger>,
public BnSurfaceComposer,
protected Thread
{
public:
static char const* getServiceName() { return "SurfaceFlinger"; }
SurfaceFlinger();
virtual ~SurfaceFlinger();
void init();
virtual status_t onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags);
virtual status_t dump(int fd, const Vector<String16>& args);
// ISurfaceComposer interface
virtual sp<ISurfaceComposerClient> createConnection();
virtual sp<ISurfaceComposerClient> createClientConnection();
virtual sp<IMemoryHeap> getCblk() const;
virtual void bootFinished();
virtual void openGlobalTransaction();
virtual void closeGlobalTransaction();
virtual status_t freezeDisplay(DisplayID dpy, uint32_t flags);
virtual status_t unfreezeDisplay(DisplayID dpy, uint32_t flags);
virtual int setOrientation(DisplayID dpy, int orientation, uint32_t flags);
virtual void signal() const;
virtual status_t captureScreen(DisplayID dpy,
sp<IMemoryHeap>* heap,
uint32_t* width,
uint32_t* height,
PixelFormat* format);
void screenReleased(DisplayID dpy);
void screenAcquired(DisplayID dpy);
overlay_control_device_t* getOverlayEngine() const;
status_t removeLayer(const sp<LayerBase>& layer);
status_t addLayer(const sp<LayerBase>& layer);
status_t invalidateLayerVisibility(const sp<LayerBase>& layer);
sp<Layer> getLayer(const sp<ISurface>& sur) const;
private:
friend class Client;
friend class LayerBase;
friend class LayerBuffer;
friend class LayerBaseClient;
friend class LayerBaseClient::Surface;
friend class Layer;
friend class LayerBlur;
friend class LayerDim;
sp<ISurface> createSurface(const sp<Client>& client,
int pid, const String8& name,
ISurfaceComposerClient::surface_data_t* params,
DisplayID display, uint32_t w, uint32_t h, PixelFormat format,
uint32_t flags);
sp<Layer> createNormalSurface(
const sp<Client>& client, DisplayID display,
uint32_t w, uint32_t h, uint32_t flags,
PixelFormat& format);
sp<LayerBlur> createBlurSurface(
const sp<Client>& client, DisplayID display,
uint32_t w, uint32_t h, uint32_t flags);
sp<LayerDim> createDimSurface(
const sp<Client>& client, DisplayID display,
uint32_t w, uint32_t h, uint32_t flags);
sp<LayerBuffer> createPushBuffersSurface(
const sp<Client>& client, DisplayID display,
uint32_t w, uint32_t h, uint32_t flags);
status_t removeSurface(const sp<Client>& client, SurfaceID sid);
status_t destroySurface(const sp<LayerBaseClient>& layer);
status_t setClientState(const sp<Client>& client,
int32_t count, const layer_state_t* states);
class LayerVector : public SortedVector< sp<LayerBase> > {
public:
LayerVector() { }
LayerVector(const LayerVector& rhs) : SortedVector< sp<LayerBase> >(rhs) { }
virtual int do_compare(const void* lhs, const void* rhs) const {
const sp<LayerBase>& l(*reinterpret_cast<const sp<LayerBase>*>(lhs));
const sp<LayerBase>& r(*reinterpret_cast<const sp<LayerBase>*>(rhs));
// sort layers by Z order
uint32_t lz = l->currentState().z;
uint32_t rz = r->currentState().z;
// then by sequence, so we get a stable ordering
return (lz != rz) ? (lz - rz) : (l->sequence - r->sequence);
}
};
struct State {
State() {
orientation = ISurfaceComposer::eOrientationDefault;
freezeDisplay = 0;
}
LayerVector layersSortedByZ;
uint8_t orientation;
uint8_t orientationType;
uint8_t freezeDisplay;
};
virtual bool threadLoop();
virtual status_t readyToRun();
virtual void onFirstRef();
public: // hack to work around gcc 4.0.3 bug
const GraphicPlane& graphicPlane(int dpy) const;
GraphicPlane& graphicPlane(int dpy);
private:
void waitForEvent();
public: // hack to work around gcc 4.0.3 bug
void signalEvent();
private:
void handleConsoleEvents();
void handleTransaction(uint32_t transactionFlags);
void handleTransactionLocked(
uint32_t transactionFlags,
Vector< sp<LayerBase> >& ditchedLayers);
void computeVisibleRegions(
LayerVector& currentLayers,
Region& dirtyRegion,
Region& wormholeRegion);
void handlePageFlip();
bool lockPageFlip(const LayerVector& currentLayers);
void unlockPageFlip(const LayerVector& currentLayers);
void handleRepaint();
void postFramebuffer();
void composeSurfaces(const Region& dirty);
void unlockClients();
ssize_t addClientLayer(const sp<Client>& client,
const sp<LayerBaseClient>& lbc);
status_t addLayer_l(const sp<LayerBase>& layer);
status_t removeLayer_l(const sp<LayerBase>& layer);
status_t purgatorizeLayer_l(const sp<LayerBase>& layer);
uint32_t getTransactionFlags(uint32_t flags);
uint32_t setTransactionFlags(uint32_t flags);
void commitTransaction();
friend class FreezeLock;
sp<FreezeLock> getFreezeLock() const;
inline void incFreezeCount() {
if (mFreezeCount == 0)
mFreezeDisplayTime = 0;
mFreezeCount++;
}
inline void decFreezeCount() { if (mFreezeCount > 0) mFreezeCount--; }
inline bool hasFreezeRequest() const { return mFreezeDisplay; }
inline bool isFrozen() const {
return (mFreezeDisplay || mFreezeCount>0) && mBootFinished;
}
void debugFlashRegions();
void debugShowFPS() const;
void drawWormhole() const;
mutable MessageQueue mEventQueue;
status_t postMessageAsync(const sp<MessageBase>& msg,
nsecs_t reltime=0, uint32_t flags = 0);
status_t postMessageSync(const sp<MessageBase>& msg,
nsecs_t reltime=0, uint32_t flags = 0);
// access must be protected by mStateLock
mutable Mutex mStateLock;
State mCurrentState;
State mDrawingState;
volatile int32_t mTransactionFlags;
volatile int32_t mTransactionCount;
Condition mTransactionCV;
bool mResizeTransationPending;
// protected by mStateLock (but we could use another lock)
GraphicPlane mGraphicPlanes[1];
bool mLayersRemoved;
DefaultKeyedVector< wp<IBinder>, wp<Layer> > mLayerMap;
// constant members (no synchronization needed for access)
sp<IMemoryHeap> mServerHeap;
surface_flinger_cblk_t* mServerCblk;
GLuint mWormholeTexName;
nsecs_t mBootTime;
Permission mHardwareTest;
Permission mAccessSurfaceFlinger;
Permission mReadFramebuffer;
Permission mDump;
// Can only accessed from the main thread, these members
// don't need synchronization
Region mDirtyRegion;
Region mDirtyRegionRemovedLayer;
Region mInvalidRegion;
Region mWormholeRegion;
bool mVisibleRegionsDirty;
bool mDeferReleaseConsole;
bool mFreezeDisplay;
int32_t mFreezeCount;
nsecs_t mFreezeDisplayTime;
Vector< sp<LayerBase> > mVisibleLayersSortedByZ;
// don't use a lock for these, we don't care
int mDebugRegion;
int mDebugBackground;
volatile nsecs_t mDebugInSwapBuffers;
nsecs_t mLastSwapBufferTime;
volatile nsecs_t mDebugInTransaction;
nsecs_t mLastTransactionTime;
bool mBootFinished;
// these are thread safe
mutable Barrier mReadyToRunBarrier;
// atomic variables
enum {
eConsoleReleased = 1,
eConsoleAcquired = 2
};
volatile int32_t mConsoleSignals;
// only written in the main thread, only read in other threads
volatile int32_t mSecureFrameBuffer;
};
// ---------------------------------------------------------------------------
class FreezeLock : public LightRefBase<FreezeLock> {
SurfaceFlinger* mFlinger;
public:
FreezeLock(SurfaceFlinger* flinger)
: mFlinger(flinger) {
mFlinger->incFreezeCount();
}
~FreezeLock() {
mFlinger->decFreezeCount();
}
};
// ---------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_SURFACE_FLINGER_H
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