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replicant-frameworks_native/include/surfaceflinger/Surface.h
Jamie Gennis aca4e22879 Re-use existing Surface objects when reading them from parcels. 
This change adds a process-global cache of previously deserialized Surface
objects so that if a Surface object wrapping the same ISurface gets received
again the same Surface can be used.  This is important because the 'tail'
pointer in the SharedBufferClient is stored only on the client side, and needs
to be the same for all the Surface objects wrapping an ISurface instance.  This
solves the problem by making there only be one Surface object wrapping an
ISurface per process.

Change-Id: I4bf0b8787885c56277622fca053022d2bb638902
2010-07-16 13:03:15 -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_SF_SURFACE_H
#define ANDROID_SF_SURFACE_H
#include <stdint.h>
#include <sys/types.h>
#include <utils/KeyedVector.h>
#include <utils/RefBase.h>
#include <utils/threads.h>
#include <ui/PixelFormat.h>
#include <ui/Region.h>
#include <ui/egl/android_natives.h>
#include <surfaceflinger/ISurface.h>
#include <surfaceflinger/ISurfaceComposerClient.h>
#define ANDROID_VIEW_SURFACE_JNI_ID "mNativeSurface"
namespace android {
// ---------------------------------------------------------------------------
class GraphicBuffer;
class GraphicBufferMapper;
class IOMX;
class Rect;
class Surface;
class SurfaceComposerClient;
class SharedClient;
class SharedBufferClient;
class SurfaceClient;
// ---------------------------------------------------------------------------
class SurfaceControl : public RefBase
{
public:
static bool isValid(const sp<SurfaceControl>& surface) {
return (surface != 0) && surface->isValid();
}
bool isValid() {
return mToken>=0 && mClient!=0;
}
static bool isSameSurface(
const sp<SurfaceControl>& lhs, const sp<SurfaceControl>& rhs);
uint32_t getFlags() const { return mFlags; }
uint32_t getIdentity() const { return mIdentity; }
// release surface data from java
void clear();
status_t setLayer(int32_t layer);
status_t setPosition(int32_t x, int32_t y);
status_t setSize(uint32_t w, uint32_t h);
status_t hide();
status_t show(int32_t layer = -1);
status_t freeze();
status_t unfreeze();
status_t setFlags(uint32_t flags, uint32_t mask);
status_t setTransparentRegionHint(const Region& transparent);
status_t setAlpha(float alpha=1.0f);
status_t setMatrix(float dsdx, float dtdx, float dsdy, float dtdy);
status_t setFreezeTint(uint32_t tint);
static status_t writeSurfaceToParcel(
const sp<SurfaceControl>& control, Parcel* parcel);
sp<Surface> getSurface() const;
private:
// can't be copied
SurfaceControl& operator = (SurfaceControl& rhs);
SurfaceControl(const SurfaceControl& rhs);
friend class SurfaceComposerClient;
// camera and camcorder need access to the ISurface binder interface for preview
friend class Camera;
friend class MediaRecorder;
// mediaplayer needs access to ISurface for display
friend class MediaPlayer;
// for testing
friend class Test;
const sp<ISurface>& getISurface() const { return mSurface; }
friend class Surface;
SurfaceControl(
const sp<SurfaceComposerClient>& client,
const sp<ISurface>& surface,
const ISurfaceComposerClient::surface_data_t& data,
uint32_t w, uint32_t h, PixelFormat format, uint32_t flags);
~SurfaceControl();
status_t validate() const;
void destroy();
sp<SurfaceComposerClient> mClient;
sp<ISurface> mSurface;
SurfaceID mToken;
uint32_t mIdentity;
uint32_t mWidth;
uint32_t mHeight;
PixelFormat mFormat;
uint32_t mFlags;
mutable Mutex mLock;
mutable sp<Surface> mSurfaceData;
};
// ---------------------------------------------------------------------------
class Surface
: public EGLNativeBase<ANativeWindow, Surface, RefBase>
{
public:
struct SurfaceInfo {
uint32_t w;
uint32_t h;
uint32_t s;
uint32_t usage;
PixelFormat format;
void* bits;
uint32_t reserved[2];
};
static status_t writeToParcel(
const sp<Surface>& control, Parcel* parcel);
static sp<Surface> readFromParcel(const Parcel& data);
static bool isValid(const sp<Surface>& surface) {
return (surface != 0) && surface->isValid();
}
bool isValid();
uint32_t getFlags() const { return mFlags; }
uint32_t getIdentity() const { return mIdentity; }
// the lock/unlock APIs must be used from the same thread
status_t lock(SurfaceInfo* info, bool blocking = true);
status_t lock(SurfaceInfo* info, Region* dirty, bool blocking = true);
status_t unlockAndPost();
// setSwapRectangle() is intended to be used by GL ES clients
void setSwapRectangle(const Rect& r);
private:
/*
* Android frameworks friends
* (eventually this should go away and be replaced by proper APIs)
*/
// camera and camcorder need access to the ISurface binder interface for preview
friend class Camera;
friend class MediaRecorder;
// MediaPlayer needs access to ISurface for display
friend class MediaPlayer;
friend class IOMX;
// this is just to be able to write some unit tests
friend class Test;
private:
friend class SurfaceComposerClient;
friend class SurfaceControl;
// can't be copied
Surface& operator = (Surface& rhs);
Surface(const Surface& rhs);
Surface(const sp<SurfaceControl>& control);
Surface(const Parcel& data, const sp<IBinder>& ref);
~Surface();
/*
* ANativeWindow hooks
*/
static int setSwapInterval(ANativeWindow* window, int interval);
static int dequeueBuffer(ANativeWindow* window, android_native_buffer_t** buffer);
static int lockBuffer(ANativeWindow* window, android_native_buffer_t* buffer);
static int queueBuffer(ANativeWindow* window, android_native_buffer_t* buffer);
static int query(ANativeWindow* window, int what, int* value);
static int perform(ANativeWindow* window, int operation, ...);
int dequeueBuffer(android_native_buffer_t** buffer);
int lockBuffer(android_native_buffer_t* buffer);
int queueBuffer(android_native_buffer_t* buffer);
int query(int what, int* value);
int perform(int operation, va_list args);
void dispatch_setUsage(va_list args);
int dispatch_connect(va_list args);
int dispatch_disconnect(va_list args);
int dispatch_crop(va_list args);
int dispatch_set_buffer_count(va_list args);
int dispatch_set_buffers_geometry(va_list args);
void setUsage(uint32_t reqUsage);
int connect(int api);
int disconnect(int api);
int crop(Rect const* rect);
int setBufferCount(int bufferCount);
int setBuffersGeometry(int w, int h, int format);
/*
* private stuff...
*/
void init();
status_t validate() const;
sp<ISurface> getISurface() const;
inline const GraphicBufferMapper& getBufferMapper() const { return mBufferMapper; }
inline GraphicBufferMapper& getBufferMapper() { return mBufferMapper; }
status_t getBufferLocked(int index,
uint32_t w, uint32_t h, uint32_t format, uint32_t usage);
int getBufferIndex(const sp<GraphicBuffer>& buffer) const;
int getConnectedApi() const;
bool needNewBuffer(int bufIdx,
uint32_t *pWidth, uint32_t *pHeight,
uint32_t *pFormat, uint32_t *pUsage) const;
static void cleanCachedSurfaces();
class BufferInfo {
uint32_t mWidth;
uint32_t mHeight;
uint32_t mFormat;
uint32_t mUsage;
mutable uint32_t mDirty;
enum {
GEOMETRY = 0x01
};
public:
BufferInfo();
void set(uint32_t w, uint32_t h, uint32_t format);
void set(uint32_t usage);
void get(uint32_t *pWidth, uint32_t *pHeight,
uint32_t *pFormat, uint32_t *pUsage) const;
bool validateBuffer(const sp<GraphicBuffer>& buffer) const;
};
// constants
GraphicBufferMapper& mBufferMapper;
SurfaceClient& mClient;
SharedBufferClient* mSharedBufferClient;
status_t mInitCheck;
sp<ISurface> mSurface;
uint32_t mIdentity;
PixelFormat mFormat;
uint32_t mFlags;
// protected by mSurfaceLock
Rect mSwapRectangle;
int mConnected;
Rect mNextBufferCrop;
BufferInfo mBufferInfo;
// protected by mSurfaceLock. These are also used from lock/unlock
// but in that case, they must be called form the same thread.
mutable Region mDirtyRegion;
// must be used from the lock/unlock thread
sp<GraphicBuffer> mLockedBuffer;
sp<GraphicBuffer> mPostedBuffer;
mutable Region mOldDirtyRegion;
bool mReserved;
// only used from dequeueBuffer()
Vector< sp<GraphicBuffer> > mBuffers;
// query() must be called from dequeueBuffer() thread
uint32_t mWidth;
uint32_t mHeight;
// Inherently thread-safe
mutable Mutex mSurfaceLock;
mutable Mutex mApiLock;
// A cache of Surface objects that have been deserialized into this process.
static Mutex sCachedSurfacesLock;
static DefaultKeyedVector<wp<IBinder>, wp<Surface> > sCachedSurfaces;
};
}; // namespace android
#endif // ANDROID_SF_SURFACE_H
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