SurfaceFlinger.h revision 13127d8921356dff794250e04208c3ed60b3a3df 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_SURFACE_FLINGER_H
18#define ANDROID_SURFACE_FLINGER_H
19
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <EGL/egl.h>
24#include <GLES/gl.h>
25
26#include <cutils/compiler.h>
27
28#include <utils/Atomic.h>
29#include <utils/Errors.h>
30#include <utils/KeyedVector.h>
31#include <utils/RefBase.h>
32#include <utils/SortedVector.h>
33#include <utils/threads.h>
34
35#include <binder/BinderService.h>
36#include <binder/IMemory.h>
37
38#include <ui/PixelFormat.h>
39
40#include <gui/ISurfaceComposer.h>
41#include <gui/ISurfaceComposerClient.h>
42
43#include <hardware/hwcomposer_defs.h>
44
45#include <private/gui/LayerState.h>
46
47#include "Barrier.h"
48#include "DisplayDevice.h"
49#include "FrameTracker.h"
50#include "MessageQueue.h"
51
52#include "DisplayHardware/HWComposer.h"
53
54namespace android {
55
56// ---------------------------------------------------------------------------
57
58class Client;
59class DisplayEventConnection;
60class EventThread;
61class IGraphicBufferAlloc;
62class Layer;
63class LayerDim;
64class Surface;
65
66// ---------------------------------------------------------------------------
67
68enum {
69    eTransactionNeeded        = 0x01,
70    eTraversalNeeded          = 0x02,
71    eDisplayTransactionNeeded = 0x04,
72    eTransactionMask          = 0x07
73};
74
75class SurfaceFlinger : public BinderService<SurfaceFlinger>,
76                       public BnSurfaceComposer,
77                       private IBinder::DeathRecipient,
78                       private Thread,
79                       private HWComposer::EventHandler
80{
81public:
82    static char const* getServiceName() {
83        return "SurfaceFlinger";
84    }
85
86    SurfaceFlinger();
87
88    enum {
89        EVENT_VSYNC = HWC_EVENT_VSYNC
90    };
91
92    // post an asynchronous message to the main thread
93    status_t postMessageAsync(const sp<MessageBase>& msg, nsecs_t reltime = 0,
94        uint32_t flags = 0);
95
96    // post a synchronous message to the main thread
97    status_t postMessageSync(const sp<MessageBase>& msg, nsecs_t reltime = 0,
98        uint32_t flags = 0);
99
100    // force full composition on all displays
101    void repaintEverything();
102
103    // returns the default Display
104    sp<const DisplayDevice> getDefaultDisplayDevice() const {
105        return getDisplayDevice(mBuiltinDisplays[DisplayDevice::DISPLAY_PRIMARY]);
106    }
107
108    // utility function to delete a texture on the main thread
109    void deleteTextureAsync(GLuint texture);
110
111    // allocate a h/w composer display id
112    int32_t allocateHwcDisplayId(DisplayDevice::DisplayType type);
113
114    // enable/disable h/w composer event
115    // TODO: this should be made accessible only to EventThread
116    void eventControl(int disp, int event, int enabled);
117
118    // called on the main thread by MessageQueue when an internal message
119    // is received
120    // TODO: this should be made accessible only to MessageQueue
121    void onMessageReceived(int32_t what);
122
123    // for debugging only
124    // TODO: this should be made accessible only to HWComposer
125    const Vector< sp<Layer> >& getLayerSortedByZForHwcDisplay(int disp);
126
127private:
128    friend class Client;
129    friend class DisplayEventConnection;
130    friend class Layer;
131
132    // We're reference counted, never destroy SurfaceFlinger directly
133    virtual ~SurfaceFlinger();
134
135    /* ------------------------------------------------------------------------
136     * Internal data structures
137     */
138
139    class LayerVector : public SortedVector< sp<Layer> > {
140    public:
141        LayerVector();
142        LayerVector(const LayerVector& rhs);
143        virtual int do_compare(const void* lhs, const void* rhs) const;
144    };
145
146    struct DisplayDeviceState {
147        DisplayDeviceState();
148        DisplayDeviceState(DisplayDevice::DisplayType type);
149        bool isValid() const { return type >= 0; }
150        bool isMainDisplay() const { return type == DisplayDevice::DISPLAY_PRIMARY; }
151        bool isVirtualDisplay() const { return type >= DisplayDevice::DISPLAY_VIRTUAL; }
152        DisplayDevice::DisplayType type;
153        sp<IGraphicBufferProducer> surface;
154        uint32_t layerStack;
155        Rect viewport;
156        Rect frame;
157        uint8_t orientation;
158        String8 displayName;
159        bool isSecure;
160    };
161
162    struct State {
163        LayerVector layersSortedByZ;
164        DefaultKeyedVector< wp<IBinder>, DisplayDeviceState> displays;
165    };
166
167    /* ------------------------------------------------------------------------
168     * IBinder interface
169     */
170    virtual status_t onTransact(uint32_t code, const Parcel& data,
171        Parcel* reply, uint32_t flags);
172    virtual status_t dump(int fd, const Vector<String16>& args);
173
174    /* ------------------------------------------------------------------------
175     * ISurfaceComposer interface
176     */
177    virtual sp<ISurfaceComposerClient> createConnection();
178    virtual sp<IGraphicBufferAlloc> createGraphicBufferAlloc();
179    virtual sp<IBinder> createDisplay(const String8& displayName, bool secure);
180    virtual sp<IBinder> getBuiltInDisplay(int32_t id);
181    virtual void setTransactionState(const Vector<ComposerState>& state,
182            const Vector<DisplayState>& displays, uint32_t flags);
183    virtual void bootFinished();
184    virtual bool authenticateSurfaceTexture(
185        const sp<IGraphicBufferProducer>& bufferProducer) const;
186    virtual sp<IDisplayEventConnection> createDisplayEventConnection();
187    virtual status_t captureScreen(const sp<IBinder>& display, sp<IMemoryHeap>* heap,
188        uint32_t* width, uint32_t* height, PixelFormat* format,
189        uint32_t reqWidth, uint32_t reqHeight, uint32_t minLayerZ,
190        uint32_t maxLayerZ);
191    virtual status_t captureScreen(const sp<IBinder>& display,
192            const sp<IGraphicBufferProducer>& producer,
193            uint32_t reqWidth, uint32_t reqHeight,
194            uint32_t minLayerZ, uint32_t maxLayerZ);
195    // called when screen needs to turn off
196    virtual void blank(const sp<IBinder>& display);
197    // called when screen is turning back on
198    virtual void unblank(const sp<IBinder>& display);
199    virtual status_t getDisplayInfo(const sp<IBinder>& display, DisplayInfo* info);
200
201    /* ------------------------------------------------------------------------
202     * DeathRecipient interface
203     */
204    virtual void binderDied(const wp<IBinder>& who);
205
206    /* ------------------------------------------------------------------------
207     * Thread interface
208     */
209    virtual bool threadLoop();
210    virtual status_t readyToRun();
211    virtual void onFirstRef();
212
213    /* ------------------------------------------------------------------------
214     * HWComposer::EventHandler interface
215     */
216    virtual void onVSyncReceived(int type, nsecs_t timestamp);
217    virtual void onHotplugReceived(int disp, bool connected);
218
219    /* ------------------------------------------------------------------------
220     * Message handling
221     */
222    void waitForEvent();
223    void signalTransaction();
224    void signalLayerUpdate();
225    void signalRefresh();
226
227    // called on the main thread in response to initializeDisplays()
228    void onInitializeDisplays();
229    // called on the main thread in response to blank()
230    void onScreenReleased(const sp<const DisplayDevice>& hw);
231    // called on the main thread in response to unblank()
232    void onScreenAcquired(const sp<const DisplayDevice>& hw);
233
234    void handleMessageTransaction();
235    void handleMessageInvalidate();
236    void handleMessageRefresh();
237
238    void handleTransaction(uint32_t transactionFlags);
239    void handleTransactionLocked(uint32_t transactionFlags);
240
241    /* handlePageFilp: this is were we latch a new buffer
242     * if available and compute the dirty region.
243     */
244    void handlePageFlip();
245
246    /* ------------------------------------------------------------------------
247     * Transactions
248     */
249    uint32_t getTransactionFlags(uint32_t flags);
250    uint32_t peekTransactionFlags(uint32_t flags);
251    uint32_t setTransactionFlags(uint32_t flags);
252    void commitTransaction();
253    uint32_t setClientStateLocked(const sp<Client>& client,
254        const layer_state_t& s);
255    uint32_t setDisplayStateLocked(const DisplayState& s);
256
257    /* ------------------------------------------------------------------------
258     * Layer management
259     */
260    sp<ISurface> createLayer(const String8& name, const sp<Client>& client,
261            uint32_t w, uint32_t h, PixelFormat format, uint32_t flags);
262
263    sp<Layer> createNormalLayer(const sp<Client>& client,
264            uint32_t w, uint32_t h, uint32_t flags, PixelFormat& format);
265
266    sp<LayerDim> createDimLayer(const sp<Client>& client,
267            uint32_t w, uint32_t h, uint32_t flags);
268
269    // called in response to the window-manager calling
270    // ISurfaceComposerClient::destroySurface()
271    // The specified layer is first placed in a purgatory list
272    // until all references from the client are released.
273    status_t onLayerRemoved(const sp<Client>& client, const sp<IBinder>& handle);
274
275    // called when all clients have released all their references to
276    // this layer meaning it is entirely safe to destroy all
277    // resources associated to this layer.
278    status_t onLayerDestroyed(const wp<Layer>& layer);
279
280    // remove a layer from SurfaceFlinger immediately
281    status_t removeLayer(const sp<Layer>& layer);
282
283    // add a layer to SurfaceFlinger
284    void addClientLayer(const sp<Client>& client, const sp<IBinder>& handle,
285        const sp<Layer>& lbc);
286
287    status_t removeLayer_l(const sp<Layer>& layer);
288    status_t purgatorizeLayer_l(const sp<Layer>& layer);
289
290    /* ------------------------------------------------------------------------
291     * Boot animation, on/off animations and screen capture
292     */
293
294    void startBootAnim();
295
296    status_t captureScreenImplLocked(
297            const sp<const DisplayDevice>& hw,
298            sp<IMemoryHeap>* heap,
299            uint32_t* width, uint32_t* height, PixelFormat* format,
300            uint32_t reqWidth, uint32_t reqHeight, uint32_t minLayerZ,
301            uint32_t maxLayerZ);
302
303    status_t captureScreenImplLocked(
304            const sp<const DisplayDevice>& hw,
305            const sp<IGraphicBufferProducer>& producer,
306            uint32_t reqWidth, uint32_t reqHeight,
307            uint32_t minLayerZ, uint32_t maxLayerZ);
308
309    /* ------------------------------------------------------------------------
310     * EGL
311     */
312    static status_t selectConfigForAttribute(EGLDisplay dpy,
313        EGLint const* attrs, EGLint attribute, EGLint value, EGLConfig* outConfig);
314    static EGLConfig selectEGLConfig(EGLDisplay disp, EGLint visualId);
315    static EGLContext createGLContext(EGLDisplay disp, EGLConfig config);
316    void initializeGL(EGLDisplay display);
317    uint32_t getMaxTextureSize() const;
318    uint32_t getMaxViewportDims() const;
319
320    /* ------------------------------------------------------------------------
321     * Display and layer stack management
322     */
323    // called when starting, or restarting after system_server death
324    void initializeDisplays();
325
326    // Create an IBinder for a builtin display and add it to current state
327    void createBuiltinDisplayLocked(DisplayDevice::DisplayType type);
328
329    // NOTE: can only be called from the main thread or with mStateLock held
330    sp<const DisplayDevice> getDisplayDevice(const wp<IBinder>& dpy) const {
331        return mDisplays.valueFor(dpy);
332    }
333
334    // NOTE: can only be called from the main thread or with mStateLock held
335    sp<DisplayDevice> getDisplayDevice(const wp<IBinder>& dpy) {
336        return mDisplays.valueFor(dpy);
337    }
338
339    // mark a region of a layer stack dirty. this updates the dirty
340    // region of all screens presenting this layer stack.
341    void invalidateLayerStack(uint32_t layerStack, const Region& dirty);
342
343    /* ------------------------------------------------------------------------
344     * H/W composer
345     */
346
347    HWComposer& getHwComposer() const { return *mHwc; }
348
349    /* ------------------------------------------------------------------------
350     * Compositing
351     */
352    void invalidateHwcGeometry();
353    static void computeVisibleRegions(
354            const LayerVector& currentLayers, uint32_t layerStack,
355            Region& dirtyRegion, Region& opaqueRegion);
356
357    void preComposition();
358    void postComposition();
359    void rebuildLayerStacks();
360    void setUpHWComposer();
361    void doComposition();
362    void doDebugFlashRegions();
363    void doDisplayComposition(const sp<const DisplayDevice>& hw,
364            const Region& dirtyRegion);
365    void doComposeSurfaces(const sp<const DisplayDevice>& hw,
366            const Region& dirty);
367
368    void postFramebuffer();
369    void drawWormhole(const sp<const DisplayDevice>& hw,
370            const Region& region) const;
371    GLuint getProtectedTexName() const {
372        return mProtectedTexName;
373    }
374
375    /* ------------------------------------------------------------------------
376     * Display management
377     */
378
379
380    /* ------------------------------------------------------------------------
381     * Debugging & dumpsys
382     */
383    void listLayersLocked(const Vector<String16>& args, size_t& index,
384        String8& result, char* buffer, size_t SIZE) const;
385    void dumpStatsLocked(const Vector<String16>& args, size_t& index,
386        String8& result, char* buffer, size_t SIZE) const;
387    void clearStatsLocked(const Vector<String16>& args, size_t& index,
388        String8& result, char* buffer, size_t SIZE);
389    void dumpAllLocked(String8& result, char* buffer, size_t SIZE) const;
390    bool startDdmConnection();
391    static void appendSfConfigString(String8& result);
392
393    /* ------------------------------------------------------------------------
394     * Attributes
395     */
396
397    // access must be protected by mStateLock
398    mutable Mutex mStateLock;
399    State mCurrentState;
400    volatile int32_t mTransactionFlags;
401    Condition mTransactionCV;
402    SortedVector< sp<Layer> > mLayerPurgatory;
403    bool mTransactionPending;
404    bool mAnimTransactionPending;
405    Vector< sp<Layer> > mLayersPendingRemoval;
406
407    // protected by mStateLock (but we could use another lock)
408    bool mLayersRemoved;
409
410    // access must be protected by mInvalidateLock
411    volatile int32_t mRepaintEverything;
412
413    // constant members (no synchronization needed for access)
414    HWComposer* mHwc;
415    GLuint mProtectedTexName;
416    nsecs_t mBootTime;
417    sp<EventThread> mEventThread;
418    GLint mMaxViewportDims[2];
419    GLint mMaxTextureSize;
420    EGLContext mEGLContext;
421    EGLConfig mEGLConfig;
422    EGLDisplay mEGLDisplay;
423    sp<IBinder> mBuiltinDisplays[DisplayDevice::NUM_DISPLAY_TYPES];
424
425    // Can only accessed from the main thread, these members
426    // don't need synchronization
427    State mDrawingState;
428    bool mVisibleRegionsDirty;
429    bool mHwWorkListDirty;
430    bool mAnimCompositionPending;
431
432    // this may only be written from the main thread with mStateLock held
433    // it may be read from other threads with mStateLock held
434    DefaultKeyedVector< wp<IBinder>, sp<DisplayDevice> > mDisplays;
435
436    // don't use a lock for these, we don't care
437    int mDebugRegion;
438    int mDebugDDMS;
439    int mDebugDisableHWC;
440    int mDebugDisableTransformHint;
441    volatile nsecs_t mDebugInSwapBuffers;
442    nsecs_t mLastSwapBufferTime;
443    volatile nsecs_t mDebugInTransaction;
444    nsecs_t mLastTransactionTime;
445    bool mBootFinished;
446
447    // these are thread safe
448    mutable MessageQueue mEventQueue;
449    mutable Barrier mReadyToRunBarrier;
450    FrameTracker mAnimFrameTracker;
451
452    // protected by mDestroyedLayerLock;
453    mutable Mutex mDestroyedLayerLock;
454    Vector<Layer const *> mDestroyedLayers;
455
456    /* ------------------------------------------------------------------------
457     * Feature prototyping
458     */
459
460    sp<IBinder> mExtDisplayToken;
461};
462
463// ---------------------------------------------------------------------------
464}; // namespace android
465
466#endif // ANDROID_SURFACE_FLINGER_H
467