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// Copyright (c) 2012 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 "ppapi/proxy/ppapi_command_buffer_proxy.h"
#include "ppapi/proxy/ppapi_messages.h"
#include "ppapi/proxy/proxy_channel.h"
#include "ppapi/shared_impl/api_id.h"
#include "ppapi/shared_impl/host_resource.h"
#include "ppapi/shared_impl/proxy_lock.h"
namespace ppapi {
namespace proxy {
PpapiCommandBufferProxy::PpapiCommandBufferProxy(
const ppapi::HostResource& resource,
ProxyChannel* channel)
: resource_(resource),
channel_(channel) {
}
PpapiCommandBufferProxy::~PpapiCommandBufferProxy() {
// gpu::Buffers are no longer referenced, allowing shared memory objects to be
// deleted, closing the handle in this process.
}
bool PpapiCommandBufferProxy::Initialize() {
return true;
}
gpu::CommandBuffer::State PpapiCommandBufferProxy::GetLastState() {
ppapi::ProxyLock::AssertAcquiredDebugOnly();
return last_state_;
}
int32 PpapiCommandBufferProxy::GetLastToken() {
ppapi::ProxyLock::AssertAcquiredDebugOnly();
return last_state_.token;
}
void PpapiCommandBufferProxy::Flush(int32 put_offset) {
if (last_state_.error != gpu::error::kNoError)
return;
IPC::Message* message = new PpapiHostMsg_PPBGraphics3D_AsyncFlush(
ppapi::API_ID_PPB_GRAPHICS_3D, resource_, put_offset);
// Do not let a synchronous flush hold up this message. If this handler is
// deferred until after the synchronous flush completes, it will overwrite the
// cached last_state_ with out-of-date data.
message->set_unblock(true);
Send(message);
}
void PpapiCommandBufferProxy::WaitForTokenInRange(int32 start, int32 end) {
if (last_state_.error != gpu::error::kNoError)
return;
bool success;
gpu::CommandBuffer::State state;
if (Send(new PpapiHostMsg_PPBGraphics3D_WaitForTokenInRange(
ppapi::API_ID_PPB_GRAPHICS_3D,
resource_,
start,
end,
&state,
&success)))
UpdateState(state, success);
}
void PpapiCommandBufferProxy::WaitForGetOffsetInRange(int32 start, int32 end) {
if (last_state_.error != gpu::error::kNoError)
return;
bool success;
gpu::CommandBuffer::State state;
if (Send(new PpapiHostMsg_PPBGraphics3D_WaitForGetOffsetInRange(
ppapi::API_ID_PPB_GRAPHICS_3D,
resource_,
start,
end,
&state,
&success)))
UpdateState(state, success);
}
void PpapiCommandBufferProxy::SetGetBuffer(int32 transfer_buffer_id) {
if (last_state_.error == gpu::error::kNoError) {
Send(new PpapiHostMsg_PPBGraphics3D_SetGetBuffer(
ppapi::API_ID_PPB_GRAPHICS_3D, resource_, transfer_buffer_id));
}
}
scoped_refptr<gpu::Buffer> PpapiCommandBufferProxy::CreateTransferBuffer(
size_t size,
int32* id) {
*id = -1;
if (last_state_.error != gpu::error::kNoError)
return NULL;
// Assuming we are in the renderer process, the service is responsible for
// duplicating the handle. This might not be true for NaCl.
ppapi::proxy::SerializedHandle handle(
ppapi::proxy::SerializedHandle::SHARED_MEMORY);
if (!Send(new PpapiHostMsg_PPBGraphics3D_CreateTransferBuffer(
ppapi::API_ID_PPB_GRAPHICS_3D, resource_, size, id, &handle))) {
return NULL;
}
if (*id <= 0 || !handle.is_shmem())
return NULL;
scoped_ptr<base::SharedMemory> shared_memory(
new base::SharedMemory(handle.shmem(), false));
// Map the shared memory on demand.
if (!shared_memory->memory()) {
if (!shared_memory->Map(handle.size())) {
*id = -1;
return NULL;
}
}
return gpu::MakeBufferFromSharedMemory(shared_memory.Pass(), handle.size());
}
void PpapiCommandBufferProxy::DestroyTransferBuffer(int32 id) {
if (last_state_.error != gpu::error::kNoError)
return;
Send(new PpapiHostMsg_PPBGraphics3D_DestroyTransferBuffer(
ppapi::API_ID_PPB_GRAPHICS_3D, resource_, id));
}
void PpapiCommandBufferProxy::Echo(const base::Closure& callback) {
NOTREACHED();
}
uint32 PpapiCommandBufferProxy::CreateStreamTexture(uint32 texture_id) {
NOTREACHED();
return 0;
}
uint32 PpapiCommandBufferProxy::InsertSyncPoint() {
uint32 sync_point = 0;
if (last_state_.error == gpu::error::kNoError) {
Send(new PpapiHostMsg_PPBGraphics3D_InsertSyncPoint(
ppapi::API_ID_PPB_GRAPHICS_3D, resource_, &sync_point));
}
return sync_point;
}
void PpapiCommandBufferProxy::SignalSyncPoint(uint32 sync_point,
const base::Closure& callback) {
NOTREACHED();
}
void PpapiCommandBufferProxy::SignalQuery(uint32 query,
const base::Closure& callback) {
NOTREACHED();
}
void PpapiCommandBufferProxy::SetSurfaceVisible(bool visible) {
NOTREACHED();
}
void PpapiCommandBufferProxy::SendManagedMemoryStats(
const gpu::ManagedMemoryStats& stats) {
NOTREACHED();
}
gpu::Capabilities PpapiCommandBufferProxy::GetCapabilities() {
// TODO(boliu): Need to implement this to use cc in Pepper. Tracked in
// crbug.com/325391.
return gpu::Capabilities();
}
gfx::GpuMemoryBuffer* PpapiCommandBufferProxy::CreateGpuMemoryBuffer(
size_t width,
size_t height,
unsigned internalformat,
int32* id) {
NOTREACHED();
return NULL;
}
void PpapiCommandBufferProxy::DestroyGpuMemoryBuffer(int32 id) {
NOTREACHED();
}
bool PpapiCommandBufferProxy::Send(IPC::Message* msg) {
DCHECK(last_state_.error == gpu::error::kNoError);
if (channel_->Send(msg))
return true;
last_state_.error = gpu::error::kLostContext;
return false;
}
void PpapiCommandBufferProxy::UpdateState(
const gpu::CommandBuffer::State& state,
bool success) {
// Handle wraparound. It works as long as we don't have more than 2B state
// updates in flight across which reordering occurs.
if (success) {
if (state.generation - last_state_.generation < 0x80000000U) {
last_state_ = state;
}
} else {
last_state_.error = gpu::error::kLostContext;
++last_state_.generation;
}
}
} // namespace proxy
} // namespace ppapi
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