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Fix remote GraphicBuffer allocation in SurfaceFlinger.

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This change fixes a horrible hack that I did to allow application
processes to create GraphicBuffer objects by making a binder call to
SurfaceFlinger.  This change introduces a new binder interface
specifically for doing this, and does it in such a way that
SurfaceFlinger will maintain a reference to the buffers until the app is
done with them.

Change-Id: Icb240397c6c206d7f69124c1497a829f051cb49b
This commit is contained in:
Jamie Gennis 2011-01-12 18:30:40 -08:00
parent e5366c567a
commit 9a78c90cd4
9 changed files with 297 additions and 74 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
include/gui/SurfaceTexture.h
View File

@ -26,12 +26,15 @@
#include <ui/GraphicBuffer.h>
#include <utils/threads.h>
#include <utils/Vector.h>
#define ANDROID_GRAPHICS_SURFACETEXTURE_JNI_ID "mSurfaceTexture"
namespace android {
// ----------------------------------------------------------------------------
class IGraphicBufferAlloc;
class SurfaceTexture : public BnSurfaceTexture {
public:
enum { MIN_BUFFER_SLOTS = 3 };
@ -140,6 +143,12 @@ private:
// reset mCurrentTexture to INVALID_BUFFER_SLOT.
int mCurrentTexture;
// mCurrentTextureBuf is the graphic buffer of the current texture. It's
// possible that this buffer is not associated with any buffer slot, so we
// must track it separately in order to properly use
// IGraphicBufferAlloc::freeAllGraphicBuffersExcept.
sp<GraphicBuffer> mCurrentTextureBuf;
// mCurrentCrop is the crop rectangle that applies to the current texture.
// It gets set to mLastQueuedCrop each time updateTexImage is called.
Rect mCurrentCrop;
@ -176,6 +185,16 @@ private:
// changed with a call to setTexName.
const GLuint mTexName;
// mGraphicBufferAlloc is the connection to SurfaceFlinger that is used to
// allocate new GraphicBuffer objects.
sp<IGraphicBufferAlloc> mGraphicBufferAlloc;
// mAllocdBuffers is mirror of the list of buffers that SurfaceFlinger is
// referencing. This is kept so that gralloc implementations do not need to
// properly handle the case where SurfaceFlinger no longer holds a reference
// to a buffer, but other processes do.
Vector<sp<GraphicBuffer> > mAllocdBuffers;
// mMutex is the mutex used to prevent concurrent access to the member
// variables of SurfaceTexture objects. It must be locked whenever the
// member variables are accessed.

64
include/surfaceflinger/IGraphicBufferAlloc.h Normal file
View File

@ -0,0 +1,64 @@
/*
* Copyright (C) 2011 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_IGRAPHIC_BUFFER_ALLOC_H
#define ANDROID_SF_IGRAPHIC_BUFFER_ALLOC_H
#include <stdint.h>
#include <sys/types.h>
#include <utils/RefBase.h>
#include <binder/IInterface.h>
namespace android {
// ----------------------------------------------------------------------------
class IGraphicBufferAlloc : public IInterface
{
public:
DECLARE_META_INTERFACE(GraphicBufferAlloc);
/* Create a new GraphicBuffer for the client to use. The server will
* maintain a reference to the newly created GraphicBuffer until
* freeAllGraphicBuffers is called.
*/
virtual sp<GraphicBuffer> createGraphicBuffer(uint32_t w, uint32_t h,
PixelFormat format, uint32_t usage) = 0;
/* Free all but one of the GraphicBuffer objects that the server is
* currently referencing. If bufIndex is not a valid index of the buffers
* the server is referencing, then all buffers are freed.
*/
virtual void freeAllGraphicBuffersExcept(int bufIndex) = 0;
};
// ----------------------------------------------------------------------------
class BnGraphicBufferAlloc : public BnInterface<IGraphicBufferAlloc>
{
public:
virtual status_t onTransact( uint32_t code,
const Parcel& data,
Parcel* reply,
uint32_t flags = 0);
};
// ----------------------------------------------------------------------------
}; // namespace android
#endif // ANDROID_SF_IGRAPHIC_BUFFER_ALLOC_H

14
include/surfaceflinger/ISurfaceComposer.h
View File

@ -28,6 +28,7 @@
#include <ui/PixelFormat.h>
#include <surfaceflinger/ISurfaceComposerClient.h>
#include <surfaceflinger/IGraphicBufferAlloc.h>
namespace android {
// ----------------------------------------------------------------------------
@ -96,6 +97,10 @@ public:
*/
virtual sp<ISurfaceComposerClient> createClientConnection() = 0;
/* create a graphic buffer allocator
*/
virtual sp<IGraphicBufferAlloc> createGraphicBufferAlloc() = 0;
/* retrieve the control block */
virtual sp<IMemoryHeap> getCblk() const = 0;
@ -131,13 +136,6 @@ public:
* This is an ASYNCHRONOUS call.
*/
virtual void signal() const = 0;
/* Create a new GraphicBuffer for the client to use. SurfaceFlinger will
* not maintain a reference to the GraphicBuffer, so the underlying native
* handle will be freed once the client references are released.
*/
virtual sp<GraphicBuffer> createGraphicBuffer(uint32_t w, uint32_t h,
PixelFormat format, uint32_t usage) const = 0;
};
// ----------------------------------------------------------------------------
@ -151,7 +149,7 @@ public:
BOOT_FINISHED = IBinder::FIRST_CALL_TRANSACTION,
CREATE_CONNECTION,
CREATE_CLIENT_CONNECTION,
CREATE_GRAPHIC_BUFFER,
CREATE_GRAPHIC_BUFFER_ALLOC,
GET_CBLK,
OPEN_GLOBAL_TRANSACTION,
CLOSE_GLOBAL_TRANSACTION,

43
libs/gui/SurfaceTexture.cpp
View File

@ -29,6 +29,7 @@
#include <surfaceflinger/ISurfaceComposer.h>
#include <surfaceflinger/SurfaceComposerClient.h>
#include <surfaceflinger/IGraphicBufferAlloc.h>
#include <utils/Log.h>
@ -83,6 +84,8 @@ SurfaceTexture::SurfaceTexture(GLuint tex) :
mSlots[i].mEglDisplay = EGL_NO_DISPLAY;
mSlots[i].mOwnedByClient = false;
}
sp<ISurfaceComposer> composer(ComposerService::getComposerService());
mGraphicBufferAlloc = composer->createGraphicBufferAlloc();
}
SurfaceTexture::~SurfaceTexture() {
@ -110,9 +113,8 @@ sp<GraphicBuffer> SurfaceTexture::requestBuffer(int buf,
return 0;
}
usage |= GraphicBuffer::USAGE_HW_TEXTURE;
sp<ISurfaceComposer> composer(ComposerService::getComposerService());
sp<GraphicBuffer> graphicBuffer(composer->createGraphicBuffer(w, h,
format, usage));
sp<GraphicBuffer> graphicBuffer(
mGraphicBufferAlloc->createGraphicBuffer(w, h, format, usage));
if (graphicBuffer == 0) {
LOGE("requestBuffer: SurfaceComposer::createGraphicBuffer failed");
} else {
@ -122,6 +124,7 @@ sp<GraphicBuffer> SurfaceTexture::requestBuffer(int buf,
mSlots[buf].mEglImage = EGL_NO_IMAGE_KHR;
mSlots[buf].mEglDisplay = EGL_NO_DISPLAY;
}
mAllocdBuffers.add(graphicBuffer);
}
return graphicBuffer;
}
@ -204,27 +207,28 @@ status_t SurfaceTexture::updateTexImage() {
// Initially both mCurrentTexture and mLastQueued are INVALID_BUFFER_SLOT,
// so this check will fail until a buffer gets queued.
if (mCurrentTexture != mLastQueued) {
// Update the SurfaceTexture state.
mCurrentTexture = mLastQueued;
mCurrentCrop = mLastQueuedCrop;
mCurrentTransform = mLastQueuedTransform;
// Update the GL texture object.
EGLImageKHR image = mSlots[mCurrentTexture].mEglImage;
EGLImageKHR image = mSlots[mLastQueued].mEglImage;
if (image == EGL_NO_IMAGE_KHR) {
EGLDisplay dpy = eglGetCurrentDisplay();
sp<GraphicBuffer> graphicBuffer = mSlots[mCurrentTexture].mGraphicBuffer;
sp<GraphicBuffer> graphicBuffer = mSlots[mLastQueued].mGraphicBuffer;
image = createImage(dpy, graphicBuffer);
mSlots[mCurrentTexture].mEglImage = image;
mSlots[mCurrentTexture].mEglDisplay = dpy;
mSlots[mLastQueued].mEglImage = image;
mSlots[mLastQueued].mEglDisplay = dpy;
}
glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, (GLeglImageOES)image);
GLint error = glGetError();
if (error != GL_NO_ERROR) {
LOGE("error binding external texture image %p (slot %d): %#04x",
image, mCurrentTexture, error);
image, mLastQueued, error);
return -EINVAL;
}
// Update the SurfaceTexture state.
mCurrentTexture = mLastQueued;
mCurrentTextureBuf = mSlots[mCurrentTexture].mGraphicBuffer;
mCurrentCrop = mLastQueuedCrop;
mCurrentTransform = mLastQueuedTransform;
}
return OK;
}
@ -282,6 +286,19 @@ void SurfaceTexture::freeAllBuffers() {
mSlots[i].mEglDisplay = EGL_NO_DISPLAY;
}
}
int exceptBuf = -1;
for (size_t i = 0; i < mAllocdBuffers.size(); i++) {
if (mAllocdBuffers[i] == mCurrentTextureBuf) {
exceptBuf = i;
break;
}
}
mAllocdBuffers.clear();
if (exceptBuf >= 0) {
mAllocdBuffers.add(mCurrentTextureBuf);
}
mGraphicBufferAlloc->freeAllGraphicBuffersExcept(exceptBuf);
}
EGLImageKHR SurfaceTexture::createImage(EGLDisplay dpy,

1
libs/surfaceflinger_client/Android.mk
View File

@ -5,6 +5,7 @@ LOCAL_SRC_FILES:= \
ISurfaceComposer.cpp \
ISurface.cpp \
ISurfaceComposerClient.cpp \
IGraphicBufferAlloc.cpp \
LayerState.cpp \
SharedBufferStack.cpp \
Surface.cpp \

108
libs/surfaceflinger_client/IGraphicBufferAlloc.cpp Normal file
View File

@ -0,0 +1,108 @@
/*
* Copyright (C) 2011 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.
*/
// tag as surfaceflinger
#define LOG_TAG "SurfaceFlinger"
#include <stdint.h>
#include <sys/types.h>
#include <binder/Parcel.h>
#include <ui/GraphicBuffer.h>
#include <surfaceflinger/IGraphicBufferAlloc.h>
// ---------------------------------------------------------------------------
namespace android {
enum {
CREATE_GRAPHIC_BUFFER = IBinder::FIRST_CALL_TRANSACTION,
FREE_ALL_GRAPHIC_BUFFERS_EXCEPT,
};
class BpGraphicBufferAlloc : public BpInterface<IGraphicBufferAlloc>
{
public:
BpGraphicBufferAlloc(const sp<IBinder>& impl)
: BpInterface<IGraphicBufferAlloc>(impl)
{
}
virtual sp<GraphicBuffer> createGraphicBuffer(uint32_t w, uint32_t h,
PixelFormat format, uint32_t usage) {
Parcel data, reply;
data.writeInterfaceToken(
IGraphicBufferAlloc::getInterfaceDescriptor());
data.writeInt32(w);
data.writeInt32(h);
data.writeInt32(format);
data.writeInt32(usage);
remote()->transact(CREATE_GRAPHIC_BUFFER, data, &reply);
sp<GraphicBuffer> graphicBuffer;
bool nonNull = (bool)reply.readInt32();
if (nonNull) {
graphicBuffer = new GraphicBuffer();
reply.read(*graphicBuffer);
}
return graphicBuffer;
}
virtual void freeAllGraphicBuffersExcept(int bufIdx) {
Parcel data, reply;
data.writeInterfaceToken(
IGraphicBufferAlloc::getInterfaceDescriptor());
data.writeInt32(bufIdx);
remote()->transact(FREE_ALL_GRAPHIC_BUFFERS_EXCEPT, data, &reply);
}
};
IMPLEMENT_META_INTERFACE(GraphicBufferAlloc, "android.ui.IGraphicBufferAlloc");
// ----------------------------------------------------------------------
status_t BnGraphicBufferAlloc::onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
// codes that don't require permission check
switch(code) {
case CREATE_GRAPHIC_BUFFER: {
CHECK_INTERFACE(IGraphicBufferAlloc, data, reply);
uint32_t w = data.readInt32();
uint32_t h = data.readInt32();
PixelFormat format = data.readInt32();
uint32_t usage = data.readInt32();
sp<GraphicBuffer> result(createGraphicBuffer(w, h, format, usage));
reply->writeInt32(result != 0);
if (result != 0) {
reply->write(*result);
}
return NO_ERROR;
} break;
case FREE_ALL_GRAPHIC_BUFFERS_EXCEPT: {
CHECK_INTERFACE(IGraphicBufferAlloc, data, reply);
int bufIdx = data.readInt32();
freeAllGraphicBuffersExcept(bufIdx);
return NO_ERROR;
} break;
default:
return BBinder::onTransact(code, data, reply, flags);
}
}
}; // namespace android

46
libs/surfaceflinger_client/ISurfaceComposer.cpp
View File

@ -26,7 +26,6 @@
#include <binder/IServiceManager.h>
#include <ui/DisplayInfo.h>
#include <ui/GraphicBuffer.h>
#include <surfaceflinger/ISurfaceComposer.h>
@ -65,6 +64,15 @@ public:
return interface_cast<ISurfaceComposerClient>(reply.readStrongBinder());
}
virtual sp<IGraphicBufferAlloc> createGraphicBufferAlloc()
{
uint32_t n;
Parcel data, reply;
data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
remote()->transact(BnSurfaceComposer::CREATE_GRAPHIC_BUFFER_ALLOC, data, &reply);
return interface_cast<IGraphicBufferAlloc>(reply.readStrongBinder());
}
virtual sp<IMemoryHeap> getCblk() const
{
Parcel data, reply;
@ -170,25 +178,6 @@ public:
data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
remote()->transact(BnSurfaceComposer::SIGNAL, data, &reply, IBinder::FLAG_ONEWAY);
}
virtual sp<GraphicBuffer> createGraphicBuffer(uint32_t w, uint32_t h,
PixelFormat format, uint32_t usage) const {
Parcel data, reply;
data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
data.writeInt32(w);
data.writeInt32(h);
data.writeInt32(format);
data.writeInt32(usage);
remote()->transact(BnSurfaceComposer::CREATE_GRAPHIC_BUFFER, data,
&reply);
sp<GraphicBuffer> graphicBuffer;
bool nonNull = (bool)reply.readInt32();
if (nonNull) {
graphicBuffer = new GraphicBuffer();
reply.read(*graphicBuffer);
}
return graphicBuffer;
}
};
IMPLEMENT_META_INTERFACE(SurfaceComposer, "android.ui.ISurfaceComposer");
@ -209,6 +198,11 @@ status_t BnSurfaceComposer::onTransact(
sp<IBinder> b = createClientConnection()->asBinder();
reply->writeStrongBinder(b);
} break;
case CREATE_GRAPHIC_BUFFER_ALLOC: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
sp<IBinder> b = createGraphicBufferAlloc()->asBinder();
reply->writeStrongBinder(b);
} break;
case OPEN_GLOBAL_TRANSACTION: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
openGlobalTransaction();
@ -267,18 +261,6 @@ status_t BnSurfaceComposer::onTransact(
reply->writeInt32(f);
reply->writeInt32(res);
} break;
case CREATE_GRAPHIC_BUFFER: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
uint32_t w = data.readInt32();
uint32_t h = data.readInt32();
PixelFormat format = data.readInt32();
uint32_t usage = data.readInt32();
sp<GraphicBuffer> result(createGraphicBuffer(w, h, format, usage));
reply->writeInt32(result != 0);
if (result != 0) {
reply->write(*result);
}
} break;
case TURN_ELECTRON_BEAM_OFF: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
int32_t mode = data.readInt32();

57
services/surfaceflinger/SurfaceFlinger.cpp
View File

@ -144,6 +144,11 @@ sp<ISurfaceComposerClient> SurfaceFlinger::createClientConnection()
return bclient;
}
sp<IGraphicBufferAlloc> SurfaceFlinger::createGraphicBufferAlloc()
{
sp<GraphicBufferAlloc> gba(new GraphicBufferAlloc());
return gba;
}
const GraphicPlane& SurfaceFlinger::graphicPlane(int dpy) const
{
@ -2267,25 +2272,6 @@ sp<Layer> SurfaceFlinger::getLayer(const sp<ISurface>& sur) const
// ---------------------------------------------------------------------------
sp<GraphicBuffer> SurfaceFlinger::createGraphicBuffer(uint32_t w, uint32_t h,
PixelFormat format, uint32_t usage) const {
// XXX: HACK HACK HACK!!! This should NOT be static, but it is to fix a
// race between SurfaceFlinger unref'ing the buffer and the client ref'ing
// it.
static sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
status_t err = graphicBuffer->initCheck();
if (err != 0) {
LOGE("createGraphicBuffer: init check failed: %d", err);
return 0;
} else if (graphicBuffer->handle == 0) {
LOGE("createGraphicBuffer: unable to create GraphicBuffer");
return 0;
}
return graphicBuffer;
}
// ---------------------------------------------------------------------------
Client::Client(const sp<SurfaceFlinger>& flinger)
: mFlinger(flinger), mNameGenerator(1)
{
@ -2465,6 +2451,39 @@ status_t UserClient::setState(int32_t count, const layer_state_t* states) {
// ---------------------------------------------------------------------------
GraphicBufferAlloc::GraphicBufferAlloc() {}
GraphicBufferAlloc::~GraphicBufferAlloc() {}
sp<GraphicBuffer> GraphicBufferAlloc::createGraphicBuffer(uint32_t w, uint32_t h,
PixelFormat format, uint32_t usage) {
sp<GraphicBuffer> graphicBuffer(new GraphicBuffer(w, h, format, usage));
status_t err = graphicBuffer->initCheck();
if (err != 0) {
LOGE("createGraphicBuffer: init check failed: %d", err);
return 0;
} else if (graphicBuffer->handle == 0) {
LOGE("createGraphicBuffer: unable to create GraphicBuffer");
return 0;
}
Mutex::Autolock _l(mLock);
mBuffers.add(graphicBuffer);
return graphicBuffer;
}
void GraphicBufferAlloc::freeAllGraphicBuffersExcept(int bufIdx) {
Mutex::Autolock _l(mLock);
if (0 <= bufIdx && bufIdx < mBuffers.size()) {
sp<GraphicBuffer> b(mBuffers[bufIdx]);
mBuffers.clear();
mBuffers.add(b);
} else {
mBuffers.clear();
}
}
// ---------------------------------------------------------------------------
GraphicPlane::GraphicPlane()
: mHw(0)
{

19
services/surfaceflinger/SurfaceFlinger.h
View File

@ -34,6 +34,7 @@
#include <ui/PixelFormat.h>
#include <surfaceflinger/ISurfaceComposer.h>
#include <surfaceflinger/ISurfaceComposerClient.h>
#include <surfaceflinger/IGraphicBufferAlloc.h>
#include "Barrier.h"
#include "Layer.h"
@ -119,6 +120,21 @@ private:
sp<SurfaceFlinger> mFlinger;
};
class GraphicBufferAlloc : public BnGraphicBufferAlloc
{
public:
GraphicBufferAlloc();
virtual ~GraphicBufferAlloc();
virtual sp<GraphicBuffer> createGraphicBuffer(uint32_t w, uint32_t h,
PixelFormat format, uint32_t usage);
virtual void freeAllGraphicBuffersExcept(int bufIdx);
private:
Vector<sp<GraphicBuffer> > mBuffers;
Mutex mLock;
};
// ---------------------------------------------------------------------------
class GraphicPlane
@ -184,6 +200,7 @@ public:
// ISurfaceComposer interface
virtual sp<ISurfaceComposerClient> createConnection();
virtual sp<ISurfaceComposerClient> createClientConnection();
virtual sp<IGraphicBufferAlloc> createGraphicBufferAlloc();
virtual sp<IMemoryHeap> getCblk() const;
virtual void bootFinished();
virtual void openGlobalTransaction();
@ -322,8 +339,6 @@ private:
status_t electronBeamOnAnimationImplLocked();
status_t renderScreenToTextureLocked(DisplayID dpy,
GLuint* textureName, GLfloat* uOut, GLfloat* vOut);
sp<GraphicBuffer> createGraphicBuffer(uint32_t w, uint32_t h,
PixelFormat format, uint32_t usage) const;
friend class FreezeLock;
sp<FreezeLock> getFreezeLock() const;