SurfaceFlinger.h revision 9c5a3335110769993d3fe997bdf1d594954d4304 
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
25/*
26 * NOTE: Make sure this file doesn't include  anything from <gl/ > or <gl2/ >
27 */
28
29#include <cutils/compiler.h>
30
31#include <utils/Atomic.h>
32#include <utils/Errors.h>
33#include <utils/KeyedVector.h>
34#include <utils/RefBase.h>
35#include <utils/SortedVector.h>
36#include <utils/threads.h>
37
38#include <binder/IMemory.h>
39
40#include <ui/PixelFormat.h>
41#include <ui/mat4.h>
42
43#include <gui/ISurfaceComposer.h>
44#include <gui/ISurfaceComposerClient.h>
45
46#include <hardware/hwcomposer_defs.h>
47
48#include <private/gui/LayerState.h>
49
50#include "Barrier.h"
51#include "DisplayDevice.h"
52#include "FrameTracker.h"
53#include "MessageQueue.h"
54
55#include "DisplayHardware/HWComposer.h"
56#include "Effects/Daltonizer.h"
57
58namespace android {
59
60// ---------------------------------------------------------------------------
61
62class Client;
63class DisplayEventConnection;
64class EventThread;
65class IGraphicBufferAlloc;
66class Layer;
67class LayerDim;
68class Surface;
69class RenderEngine;
70
71// ---------------------------------------------------------------------------
72
73enum {
74    eTransactionNeeded        = 0x01,
75    eTraversalNeeded          = 0x02,
76    eDisplayTransactionNeeded = 0x04,
77    eTransactionMask          = 0x07
78};
79
80class SurfaceFlinger : public BnSurfaceComposer,
81                       private IBinder::DeathRecipient,
82                       private HWComposer::EventHandler
83{
84public:
85    static char const* getServiceName() ANDROID_API {
86        return "SurfaceFlinger";
87    }
88
89    SurfaceFlinger() ANDROID_API;
90
91    // must be called before clients can connect
92    void init() ANDROID_API;
93
94    // starts SurfaceFlinger main loop in the current thread
95    void run() ANDROID_API;
96
97    enum {
98        EVENT_VSYNC = HWC_EVENT_VSYNC
99    };
100
101    // post an asynchronous message to the main thread
102    status_t postMessageAsync(const sp<MessageBase>& msg, nsecs_t reltime = 0, uint32_t flags = 0);
103
104    // post a synchronous message to the main thread
105    status_t postMessageSync(const sp<MessageBase>& msg, nsecs_t reltime = 0, uint32_t flags = 0);
106
107    // force full composition on all displays
108    void repaintEverything();
109
110    // returns the default Display
111    sp<const DisplayDevice> getDefaultDisplayDevice() const {
112        return getDisplayDevice(mBuiltinDisplays[DisplayDevice::DISPLAY_PRIMARY]);
113    }
114
115    // utility function to delete a texture on the main thread
116    void deleteTextureAsync(uint32_t texture);
117
118    // enable/disable h/w composer event
119    // TODO: this should be made accessible only to EventThread
120    void eventControl(int disp, int event, int enabled);
121
122    // called on the main thread by MessageQueue when an internal message
123    // is received
124    // TODO: this should be made accessible only to MessageQueue
125    void onMessageReceived(int32_t what);
126
127    // for debugging only
128    // TODO: this should be made accessible only to HWComposer
129    const Vector< sp<Layer> >& getLayerSortedByZForHwcDisplay(int id);
130
131    RenderEngine& getRenderEngine() const {
132        return *mRenderEngine;
133    }
134
135private:
136    friend class Client;
137    friend class DisplayEventConnection;
138    friend class Layer;
139    friend class SurfaceTextureLayer;
140
141    // This value is specified in number of frames.  Log frame stats at most
142    // every half hour.
143    enum { LOG_FRAME_STATS_PERIOD =  30*60*60 };
144
145    // We're reference counted, never destroy SurfaceFlinger directly
146    virtual ~SurfaceFlinger();
147
148    /* ------------------------------------------------------------------------
149     * Internal data structures
150     */
151
152    class LayerVector : public SortedVector< sp<Layer> > {
153    public:
154        LayerVector();
155        LayerVector(const LayerVector& rhs);
156        virtual int do_compare(const void* lhs, const void* rhs) const;
157    };
158
159    struct DisplayDeviceState {
160        DisplayDeviceState();
161        DisplayDeviceState(DisplayDevice::DisplayType type);
162        bool isValid() const { return type >= 0; }
163        bool isMainDisplay() const { return type == DisplayDevice::DISPLAY_PRIMARY; }
164        bool isVirtualDisplay() const { return type >= DisplayDevice::DISPLAY_VIRTUAL; }
165        DisplayDevice::DisplayType type;
166        sp<IGraphicBufferProducer> surface;
167        uint32_t layerStack;
168        Rect viewport;
169        Rect frame;
170        uint8_t orientation;
171        String8 displayName;
172        bool isSecure;
173    };
174
175    struct State {
176        LayerVector layersSortedByZ;
177        DefaultKeyedVector< wp<IBinder>, DisplayDeviceState> displays;
178    };
179
180    /* ------------------------------------------------------------------------
181     * IBinder interface
182     */
183    virtual status_t onTransact(uint32_t code, const Parcel& data,
184        Parcel* reply, uint32_t flags);
185    virtual status_t dump(int fd, const Vector<String16>& args);
186
187    /* ------------------------------------------------------------------------
188     * ISurfaceComposer interface
189     */
190    virtual sp<ISurfaceComposerClient> createConnection();
191    virtual sp<IGraphicBufferAlloc> createGraphicBufferAlloc();
192    virtual sp<IBinder> createDisplay(const String8& displayName, bool secure);
193    virtual void destroyDisplay(const sp<IBinder>& display);
194    virtual sp<IBinder> getBuiltInDisplay(int32_t id);
195    virtual void setTransactionState(const Vector<ComposerState>& state,
196            const Vector<DisplayState>& displays, uint32_t flags);
197    virtual void bootFinished();
198    virtual bool authenticateSurfaceTexture(
199        const sp<IGraphicBufferProducer>& bufferProducer) const;
200    virtual sp<IDisplayEventConnection> createDisplayEventConnection();
201    virtual status_t captureScreen(const sp<IBinder>& display,
202            const sp<IGraphicBufferProducer>& producer,
203            uint32_t reqWidth, uint32_t reqHeight,
204            uint32_t minLayerZ, uint32_t maxLayerZ);
205    // called when screen needs to turn off
206    virtual void blank(const sp<IBinder>& display);
207    // called when screen is turning back on
208    virtual void unblank(const sp<IBinder>& display);
209    virtual status_t getDisplayInfo(const sp<IBinder>& display, DisplayInfo* info);
210
211    /* ------------------------------------------------------------------------
212     * DeathRecipient interface
213     */
214    virtual void binderDied(const wp<IBinder>& who);
215
216    /* ------------------------------------------------------------------------
217     * RefBase interface
218     */
219    virtual void onFirstRef();
220
221    /* ------------------------------------------------------------------------
222     * HWComposer::EventHandler interface
223     */
224    virtual void onVSyncReceived(int type, nsecs_t timestamp);
225    virtual void onHotplugReceived(int disp, bool connected);
226
227    /* ------------------------------------------------------------------------
228     * Message handling
229     */
230    void waitForEvent();
231    void signalTransaction();
232    void signalLayerUpdate();
233    void signalRefresh();
234
235    // called on the main thread in response to initializeDisplays()
236    void onInitializeDisplays();
237    // called on the main thread in response to blank()
238    void onScreenReleased(const sp<const DisplayDevice>& hw);
239    // called on the main thread in response to unblank()
240    void onScreenAcquired(const sp<const DisplayDevice>& hw);
241
242    void handleMessageTransaction();
243    void handleMessageInvalidate();
244    void handleMessageRefresh();
245
246    void handleTransaction(uint32_t transactionFlags);
247    void handleTransactionLocked(uint32_t transactionFlags);
248
249    /* handlePageFilp: this is were we latch a new buffer
250     * if available and compute the dirty region.
251     */
252    void handlePageFlip();
253
254    /* ------------------------------------------------------------------------
255     * Transactions
256     */
257    uint32_t getTransactionFlags(uint32_t flags);
258    uint32_t peekTransactionFlags(uint32_t flags);
259    uint32_t setTransactionFlags(uint32_t flags);
260    void commitTransaction();
261    uint32_t setClientStateLocked(const sp<Client>& client, const layer_state_t& s);
262    uint32_t setDisplayStateLocked(const DisplayState& s);
263
264    /* ------------------------------------------------------------------------
265     * Layer management
266     */
267    status_t createLayer(const String8& name, const sp<Client>& client,
268            uint32_t w, uint32_t h, PixelFormat format, uint32_t flags,
269            sp<IBinder>* handle, sp<IGraphicBufferProducer>* gbp);
270
271    status_t createNormalLayer(const sp<Client>& client, const String8& name,
272            uint32_t w, uint32_t h, uint32_t flags, PixelFormat& format,
273            sp<IBinder>* outHandle, sp<IGraphicBufferProducer>* outGbp,
274            sp<Layer>* outLayer);
275
276    status_t createDimLayer(const sp<Client>& client, const String8& name,
277            uint32_t w, uint32_t h, uint32_t flags, sp<IBinder>* outHandle,
278            sp<IGraphicBufferProducer>* outGbp, sp<Layer>* outLayer);
279
280    // called in response to the window-manager calling
281    // ISurfaceComposerClient::destroySurface()
282    status_t onLayerRemoved(const sp<Client>& client, const sp<IBinder>& handle);
283
284    // called when all clients have released all their references to
285    // this layer meaning it is entirely safe to destroy all
286    // resources associated to this layer.
287    status_t onLayerDestroyed(const wp<Layer>& layer);
288
289    // remove a layer from SurfaceFlinger immediately
290    status_t removeLayer(const sp<Layer>& layer);
291
292    // add a layer to SurfaceFlinger
293    void addClientLayer(const sp<Client>& client,
294            const sp<IBinder>& handle,
295            const sp<IGraphicBufferProducer>& gbc,
296            const sp<Layer>& lbc);
297
298    /* ------------------------------------------------------------------------
299     * Boot animation, on/off animations and screen capture
300     */
301
302    void startBootAnim();
303
304    void renderScreenImplLocked(
305            const sp<const DisplayDevice>& hw,
306            uint32_t reqWidth, uint32_t reqHeight,
307            uint32_t minLayerZ, uint32_t maxLayerZ,
308            bool yswap);
309
310    status_t captureScreenImplLocked(
311            const sp<const DisplayDevice>& hw,
312            const sp<IGraphicBufferProducer>& producer,
313            uint32_t reqWidth, uint32_t reqHeight,
314            uint32_t minLayerZ, uint32_t maxLayerZ);
315
316    /* ------------------------------------------------------------------------
317     * EGL
318     */
319    static status_t selectConfigForAttribute(EGLDisplay dpy,
320        EGLint const* attrs, EGLint attribute, EGLint value, EGLConfig* outConfig);
321    static EGLConfig selectEGLConfig(EGLDisplay disp, EGLint visualId);
322    size_t getMaxTextureSize() const;
323    size_t getMaxViewportDims() const;
324
325    /* ------------------------------------------------------------------------
326     * Display and layer stack management
327     */
328    // called when starting, or restarting after system_server death
329    void initializeDisplays();
330
331    // Create an IBinder for a builtin display and add it to current state
332    void createBuiltinDisplayLocked(DisplayDevice::DisplayType type);
333
334    // NOTE: can only be called from the main thread or with mStateLock held
335    sp<const DisplayDevice> getDisplayDevice(const wp<IBinder>& dpy) const {
336        return mDisplays.valueFor(dpy);
337    }
338
339    // NOTE: can only be called from the main thread or with mStateLock held
340    sp<DisplayDevice> getDisplayDevice(const wp<IBinder>& dpy) {
341        return mDisplays.valueFor(dpy);
342    }
343
344    // mark a region of a layer stack dirty. this updates the dirty
345    // region of all screens presenting this layer stack.
346    void invalidateLayerStack(uint32_t layerStack, const Region& dirty);
347
348    // allocate a h/w composer display id
349    int32_t allocateHwcDisplayId(DisplayDevice::DisplayType type);
350
351    /* ------------------------------------------------------------------------
352     * H/W composer
353     */
354
355    HWComposer& getHwComposer() const { return *mHwc; }
356
357    /* ------------------------------------------------------------------------
358     * Compositing
359     */
360    void invalidateHwcGeometry();
361    static void computeVisibleRegions(
362            const LayerVector& currentLayers, uint32_t layerStack,
363            Region& dirtyRegion, Region& opaqueRegion);
364
365    void preComposition();
366    void postComposition();
367    void rebuildLayerStacks();
368    void setUpHWComposer();
369    void doComposition();
370    void doDebugFlashRegions();
371    void doDisplayComposition(const sp<const DisplayDevice>& hw, const Region& dirtyRegion);
372    void doComposeSurfaces(const sp<const DisplayDevice>& hw, const Region& dirty);
373
374    void postFramebuffer();
375    void drawWormhole(const sp<const DisplayDevice>& hw, const Region& region) const;
376
377    /* ------------------------------------------------------------------------
378     * Display management
379     */
380
381
382    /* ------------------------------------------------------------------------
383     * Debugging & dumpsys
384     */
385    void listLayersLocked(const Vector<String16>& args, size_t& index, String8& result) const;
386    void dumpStatsLocked(const Vector<String16>& args, size_t& index, String8& result) const;
387    void clearStatsLocked(const Vector<String16>& args, size_t& index, String8& result);
388    void dumpAllLocked(const Vector<String16>& args, size_t& index, String8& result) const;
389    bool startDdmConnection();
390    static void appendSfConfigString(String8& result);
391    void checkScreenshot(const sp<GraphicBuffer>& buf, void const* vaddr,
392            const sp<const DisplayDevice>& hw,
393            uint32_t minLayerZ, uint32_t maxLayerZ);
394
395    void logFrameStats();
396
397    /* ------------------------------------------------------------------------
398     * Attributes
399     */
400
401    // access must be protected by mStateLock
402    mutable Mutex mStateLock;
403    State mCurrentState;
404    volatile int32_t mTransactionFlags;
405    Condition mTransactionCV;
406    bool mTransactionPending;
407    bool mAnimTransactionPending;
408    Vector< sp<Layer> > mLayersPendingRemoval;
409    SortedVector< wp<IBinder> > mGraphicBufferProducerList;
410
411    // protected by mStateLock (but we could use another lock)
412    bool mLayersRemoved;
413
414    // access must be protected by mInvalidateLock
415    volatile int32_t mRepaintEverything;
416
417    // constant members (no synchronization needed for access)
418    HWComposer* mHwc;
419    RenderEngine* mRenderEngine;
420    nsecs_t mBootTime;
421    bool mGpuToCpuSupported;
422    sp<EventThread> mEventThread;
423    EGLContext mEGLContext;
424    EGLConfig mEGLConfig;
425    EGLDisplay mEGLDisplay;
426    EGLint mEGLNativeVisualId;
427    sp<IBinder> mBuiltinDisplays[DisplayDevice::NUM_BUILTIN_DISPLAY_TYPES];
428
429    // Can only accessed from the main thread, these members
430    // don't need synchronization
431    State mDrawingState;
432    bool mVisibleRegionsDirty;
433    bool mHwWorkListDirty;
434    bool mAnimCompositionPending;
435
436    // this may only be written from the main thread with mStateLock held
437    // it may be read from other threads with mStateLock held
438    DefaultKeyedVector< wp<IBinder>, sp<DisplayDevice> > mDisplays;
439
440    // don't use a lock for these, we don't care
441    int mDebugRegion;
442    int mDebugDDMS;
443    int mDebugDisableHWC;
444    int mDebugDisableTransformHint;
445    volatile nsecs_t mDebugInSwapBuffers;
446    nsecs_t mLastSwapBufferTime;
447    volatile nsecs_t mDebugInTransaction;
448    nsecs_t mLastTransactionTime;
449    bool mBootFinished;
450
451    // these are thread safe
452    mutable MessageQueue mEventQueue;
453    FrameTracker mAnimFrameTracker;
454
455    // protected by mDestroyedLayerLock;
456    mutable Mutex mDestroyedLayerLock;
457    Vector<Layer const *> mDestroyedLayers;
458
459    /* ------------------------------------------------------------------------
460     * Feature prototyping
461     */
462
463    Daltonizer mDaltonizer;
464    bool mDaltonize;
465
466    mat4 mColorMatrix;
467    bool mHasColorMatrix;
468};
469
470// ---------------------------------------------------------------------------
471}; // namespace android
472
473#endif // ANDROID_SURFACE_FLINGER_H
474