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/*
* 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 <gui/IGraphicBufferAlloc.h>
// ---------------------------------------------------------------------------
namespace android {
enum {
CREATE_GRAPHIC_BUFFER = IBinder::FIRST_CALL_TRANSACTION,
};
class BpGraphicBufferAlloc : public BpInterface<IGraphicBufferAlloc>
{
public:
BpGraphicBufferAlloc(const sp<IBinder>& impl)
: BpInterface<IGraphicBufferAlloc>(impl)
{
}
virtual ~BpGraphicBufferAlloc();
virtual sp<GraphicBuffer> createGraphicBuffer(uint32_t width,
uint32_t height, PixelFormat format, uint32_t usage,
status_t* error) {
Parcel data, reply;
data.writeInterfaceToken(IGraphicBufferAlloc::getInterfaceDescriptor());
data.writeUint32(width);
data.writeUint32(height);
data.writeInt32(static_cast<int32_t>(format));
data.writeUint32(usage);
remote()->transact(CREATE_GRAPHIC_BUFFER, data, &reply);
sp<GraphicBuffer> graphicBuffer;
status_t result = reply.readInt32();
if (result == NO_ERROR) {
graphicBuffer = new GraphicBuffer();
result = reply.read(*graphicBuffer);
if (result != NO_ERROR) {
graphicBuffer.clear();
}
// reply.readStrongBinder();
// here we don't even have to read the BufferReference from
// the parcel, it'll die with the parcel.
}
*error = result;
return graphicBuffer;
}
};
// Out-of-line virtual method definition to trigger vtable emission in this
// translation unit (see clang warning -Wweak-vtables)
BpGraphicBufferAlloc::~BpGraphicBufferAlloc() {}
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
// BufferReference just keeps a strong reference to a GraphicBuffer until it
// is destroyed (that is, until no local or remote process have a reference
// to it).
class BufferReference : public BBinder {
sp<GraphicBuffer> mBuffer;
public:
BufferReference(const sp<GraphicBuffer>& buffer) : mBuffer(buffer) {}
};
switch (code) {
case CREATE_GRAPHIC_BUFFER: {
CHECK_INTERFACE(IGraphicBufferAlloc, data, reply);
uint32_t width = data.readUint32();
uint32_t height = data.readUint32();
PixelFormat format = static_cast<PixelFormat>(data.readInt32());
uint32_t usage = data.readUint32();
status_t error;
sp<GraphicBuffer> result =
createGraphicBuffer(width, height, format, usage, &error);
reply->writeInt32(error);
if (result != 0) {
reply->write(*result);
// We add a BufferReference to this parcel to make sure the
// buffer stays alive until the GraphicBuffer object on
// the other side has been created.
// This is needed so that the buffer handle can be
// registered before the buffer is destroyed on implementations
// that do not use file-descriptors to track their buffers.
reply->writeStrongBinder( new BufferReference(result) );
}
return NO_ERROR;
}
default:
return BBinder::onTransact(code, data, reply, flags);
}
}
}; // namespace android
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