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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/child/child_shared_bitmap_manager.h"
#include "content/child/child_thread.h"
#include "content/common/child_process_messages.h"
#include "ui/gfx/size.h"
namespace content {
namespace {
void FreeSharedMemory(scoped_refptr<ThreadSafeSender> sender,
cc::SharedBitmap* bitmap) {
TRACE_EVENT0("renderer", "ChildSharedBitmapManager::FreeSharedMemory");
sender->Send(new ChildProcessHostMsg_DeletedSharedBitmap(bitmap->id()));
delete bitmap->memory();
}
void ReleaseSharedBitmap(scoped_refptr<ThreadSafeSender> sender,
cc::SharedBitmap* handle) {
TRACE_EVENT0("renderer", "ChildSharedBitmapManager::ReleaseSharedBitmap");
sender->Send(new ChildProcessHostMsg_DeletedSharedBitmap(handle->id()));
}
} // namespace
ChildSharedBitmapManager::ChildSharedBitmapManager(
scoped_refptr<ThreadSafeSender> sender)
: sender_(sender) {
}
ChildSharedBitmapManager::~ChildSharedBitmapManager() {}
scoped_ptr<cc::SharedBitmap> ChildSharedBitmapManager::AllocateSharedBitmap(
const gfx::Size& size) {
TRACE_EVENT2("renderer",
"ChildSharedBitmapManager::AllocateSharedMemory",
"width",
size.width(),
"height",
size.height());
size_t memory_size;
if (!cc::SharedBitmap::SizeInBytes(size, &memory_size))
return scoped_ptr<cc::SharedBitmap>();
cc::SharedBitmapId id = cc::SharedBitmap::GenerateId();
scoped_ptr<base::SharedMemory> memory;
#if defined(OS_POSIX)
base::SharedMemoryHandle handle;
sender_->Send(new ChildProcessHostMsg_SyncAllocateSharedBitmap(
memory_size, id, &handle));
memory = make_scoped_ptr(new base::SharedMemory(handle, false));
CHECK(memory->Map(memory_size));
#else
memory.reset(ChildThread::AllocateSharedMemory(memory_size, sender_.get()));
CHECK(memory);
base::SharedMemoryHandle handle_to_send = memory->handle();
sender_->Send(new ChildProcessHostMsg_AllocatedSharedBitmap(
memory_size, handle_to_send, id));
#endif
return scoped_ptr<cc::SharedBitmap>(new cc::SharedBitmap(
memory.release(), id, base::Bind(&FreeSharedMemory, sender_)));
}
scoped_ptr<cc::SharedBitmap> ChildSharedBitmapManager::GetSharedBitmapFromId(
const gfx::Size&,
const cc::SharedBitmapId&) {
NOTREACHED();
return scoped_ptr<cc::SharedBitmap>();
}
scoped_ptr<cc::SharedBitmap> ChildSharedBitmapManager::GetBitmapForSharedMemory(
base::SharedMemory* mem) {
cc::SharedBitmapId id = cc::SharedBitmap::GenerateId();
base::SharedMemoryHandle handle_to_send = mem->handle();
#if defined(OS_POSIX)
if (!mem->ShareToProcess(base::GetCurrentProcessHandle(), &handle_to_send))
return scoped_ptr<cc::SharedBitmap>();
#endif
sender_->Send(new ChildProcessHostMsg_AllocatedSharedBitmap(
mem->mapped_size(), handle_to_send, id));
// The compositor owning the SharedBitmap will be closed before the
// ChildThread containng this, making the use of base::Unretained safe.
return scoped_ptr<cc::SharedBitmap>(
new cc::SharedBitmap(mem, id, base::Bind(&ReleaseSharedBitmap, sender_)));
}
} // namespace content
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