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replicant-frameworks_native/libs/gui/ISurfaceComposer.cpp
Jamie Gennis dd3cb84cfb SurfaceFlinger: add support for secure displays 
This change adds support for displays that are not allowed to display surfaces
with the eSecure flag set.  All non-virtual displays are considered secure,
while virtual displays have their secure-ness specified at creation time.

Bug: 7368436
Change-Id: I81ad535d2d1e5a7ff78269017e85b111f0098500
2012-10-22 13:41:21 -07:00

344 lines
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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.
*/
// tag as surfaceflinger
#define LOG_TAG "SurfaceFlinger"
#include <stdint.h>
#include <sys/types.h>
#include <binder/Parcel.h>
#include <binder/IMemory.h>
#include <binder/IPCThreadState.h>
#include <binder/IServiceManager.h>
#include <gui/BitTube.h>
#include <gui/IDisplayEventConnection.h>
#include <gui/ISurfaceComposer.h>
#include <gui/ISurfaceTexture.h>
#include <private/gui/LayerState.h>
#include <ui/DisplayInfo.h>
#include <utils/Log.h>
// ---------------------------------------------------------------------------
namespace android {
class IDisplayEventConnection;
class BpSurfaceComposer : public BpInterface<ISurfaceComposer>
{
public:
BpSurfaceComposer(const sp<IBinder>& impl)
: BpInterface<ISurfaceComposer>(impl)
{
}
virtual sp<ISurfaceComposerClient> createConnection()
{
uint32_t n;
Parcel data, reply;
data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
remote()->transact(BnSurfaceComposer::CREATE_CONNECTION, data, &reply);
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 void setTransactionState(
const Vector<ComposerState>& state,
const Vector<DisplayState>& displays,
uint32_t flags)
{
Parcel data, reply;
data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
{
Vector<ComposerState>::const_iterator b(state.begin());
Vector<ComposerState>::const_iterator e(state.end());
data.writeInt32(state.size());
for ( ; b != e ; ++b ) {
b->write(data);
}
}
{
Vector<DisplayState>::const_iterator b(displays.begin());
Vector<DisplayState>::const_iterator e(displays.end());
data.writeInt32(displays.size());
for ( ; b != e ; ++b ) {
b->write(data);
}
}
data.writeInt32(flags);
remote()->transact(BnSurfaceComposer::SET_TRANSACTION_STATE, data, &reply);
}
virtual void bootFinished()
{
Parcel data, reply;
data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
remote()->transact(BnSurfaceComposer::BOOT_FINISHED, data, &reply);
}
virtual status_t captureScreen(
const sp<IBinder>& display, sp<IMemoryHeap>* heap,
uint32_t* width, uint32_t* height, PixelFormat* format,
uint32_t reqWidth, uint32_t reqHeight,
uint32_t minLayerZ, uint32_t maxLayerZ)
{
Parcel data, reply;
data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
data.writeStrongBinder(display);
data.writeInt32(reqWidth);
data.writeInt32(reqHeight);
data.writeInt32(minLayerZ);
data.writeInt32(maxLayerZ);
remote()->transact(BnSurfaceComposer::CAPTURE_SCREEN, data, &reply);
*heap = interface_cast<IMemoryHeap>(reply.readStrongBinder());
*width = reply.readInt32();
*height = reply.readInt32();
*format = reply.readInt32();
return reply.readInt32();
}
virtual bool authenticateSurfaceTexture(
const sp<ISurfaceTexture>& surfaceTexture) const
{
Parcel data, reply;
int err = NO_ERROR;
err = data.writeInterfaceToken(
ISurfaceComposer::getInterfaceDescriptor());
if (err != NO_ERROR) {
ALOGE("ISurfaceComposer::authenticateSurfaceTexture: error writing "
"interface descriptor: %s (%d)", strerror(-err), -err);
return false;
}
err = data.writeStrongBinder(surfaceTexture->asBinder());
if (err != NO_ERROR) {
ALOGE("ISurfaceComposer::authenticateSurfaceTexture: error writing "
"strong binder to parcel: %s (%d)", strerror(-err), -err);
return false;
}
err = remote()->transact(BnSurfaceComposer::AUTHENTICATE_SURFACE, data,
&reply);
if (err != NO_ERROR) {
ALOGE("ISurfaceComposer::authenticateSurfaceTexture: error "
"performing transaction: %s (%d)", strerror(-err), -err);
return false;
}
int32_t result = 0;
err = reply.readInt32(&result);
if (err != NO_ERROR) {
ALOGE("ISurfaceComposer::authenticateSurfaceTexture: error "
"retrieving result: %s (%d)", strerror(-err), -err);
return false;
}
return result != 0;
}
virtual sp<IDisplayEventConnection> createDisplayEventConnection()
{
Parcel data, reply;
sp<IDisplayEventConnection> result;
int err = data.writeInterfaceToken(
ISurfaceComposer::getInterfaceDescriptor());
if (err != NO_ERROR) {
return result;
}
err = remote()->transact(
BnSurfaceComposer::CREATE_DISPLAY_EVENT_CONNECTION,
data, &reply);
if (err != NO_ERROR) {
ALOGE("ISurfaceComposer::createDisplayEventConnection: error performing "
"transaction: %s (%d)", strerror(-err), -err);
return result;
}
result = interface_cast<IDisplayEventConnection>(reply.readStrongBinder());
return result;
}
virtual sp<IBinder> createDisplay(const String8& displayName, bool secure)
{
Parcel data, reply;
data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
data.writeString8(displayName);
data.writeInt32(secure ? 1 : 0);
remote()->transact(BnSurfaceComposer::CREATE_DISPLAY, data, &reply);
return reply.readStrongBinder();
}
virtual sp<IBinder> getBuiltInDisplay(int32_t id)
{
Parcel data, reply;
data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
data.writeInt32(id);
remote()->transact(BnSurfaceComposer::GET_BUILT_IN_DISPLAY, data, &reply);
return reply.readStrongBinder();
}
virtual void blank(const sp<IBinder>& display)
{
Parcel data, reply;
data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
data.writeStrongBinder(display);
remote()->transact(BnSurfaceComposer::BLANK, data, &reply);
}
virtual void unblank(const sp<IBinder>& display)
{
Parcel data, reply;
data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
data.writeStrongBinder(display);
remote()->transact(BnSurfaceComposer::UNBLANK, data, &reply);
}
virtual status_t getDisplayInfo(const sp<IBinder>& display, DisplayInfo* info)
{
Parcel data, reply;
data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
data.writeStrongBinder(display);
remote()->transact(BnSurfaceComposer::GET_DISPLAY_INFO, data, &reply);
memcpy(info, reply.readInplace(sizeof(DisplayInfo)), sizeof(DisplayInfo));
return reply.readInt32();
}
};
IMPLEMENT_META_INTERFACE(SurfaceComposer, "android.ui.ISurfaceComposer");
// ----------------------------------------------------------------------
status_t BnSurfaceComposer::onTransact(
uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
{
switch(code) {
case CREATE_CONNECTION: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
sp<IBinder> b = createConnection()->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 SET_TRANSACTION_STATE: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
size_t count = data.readInt32();
ComposerState s;
Vector<ComposerState> state;
state.setCapacity(count);
for (size_t i=0 ; i<count ; i++) {
s.read(data);
state.add(s);
}
count = data.readInt32();
DisplayState d;
Vector<DisplayState> displays;
displays.setCapacity(count);
for (size_t i=0 ; i<count ; i++) {
d.read(data);
displays.add(d);
}
uint32_t flags = data.readInt32();
setTransactionState(state, displays, flags);
} break;
case BOOT_FINISHED: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
bootFinished();
} break;
case CAPTURE_SCREEN: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
sp<IBinder> display = data.readStrongBinder();
uint32_t reqWidth = data.readInt32();
uint32_t reqHeight = data.readInt32();
uint32_t minLayerZ = data.readInt32();
uint32_t maxLayerZ = data.readInt32();
sp<IMemoryHeap> heap;
uint32_t w, h;
PixelFormat f;
status_t res = captureScreen(display, &heap, &w, &h, &f,
reqWidth, reqHeight, minLayerZ, maxLayerZ);
reply->writeStrongBinder(heap->asBinder());
reply->writeInt32(w);
reply->writeInt32(h);
reply->writeInt32(f);
reply->writeInt32(res);
} break;
case AUTHENTICATE_SURFACE: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
sp<ISurfaceTexture> surfaceTexture =
interface_cast<ISurfaceTexture>(data.readStrongBinder());
int32_t result = authenticateSurfaceTexture(surfaceTexture) ? 1 : 0;
reply->writeInt32(result);
} break;
case CREATE_DISPLAY_EVENT_CONNECTION: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
sp<IDisplayEventConnection> connection(createDisplayEventConnection());
reply->writeStrongBinder(connection->asBinder());
return NO_ERROR;
} break;
case CREATE_DISPLAY: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
String8 displayName = data.readString8();
bool secure = bool(data.readInt32());
sp<IBinder> display(createDisplay(displayName, secure));
reply->writeStrongBinder(display);
return NO_ERROR;
} break;
case GET_BUILT_IN_DISPLAY: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
int32_t id = data.readInt32();
sp<IBinder> display(getBuiltInDisplay(id));
reply->writeStrongBinder(display);
return NO_ERROR;
} break;
case BLANK: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
sp<IBinder> display = data.readStrongBinder();
blank(display);
} break;
case UNBLANK: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
sp<IBinder> display = data.readStrongBinder();
unblank(display);
} break;
case GET_DISPLAY_INFO: {
CHECK_INTERFACE(ISurfaceComposer, data, reply);
DisplayInfo info;
sp<IBinder> display = data.readStrongBinder();
status_t result = getDisplayInfo(display, &info);
memcpy(reply->writeInplace(sizeof(DisplayInfo)), &info, sizeof(DisplayInfo));
reply->writeInt32(result);
} break;
default:
return BBinder::onTransact(code, data, reply, flags);
}
return NO_ERROR;
}
// ----------------------------------------------------------------------------
};
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