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// Copyright 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 "mojo/services/gles2/command_buffer_impl.h"
#include "base/bind.h"
#include "base/memory/shared_memory.h"
#include "gpu/command_buffer/common/constants.h"
#include "gpu/command_buffer/service/command_buffer_service.h"
#include "gpu/command_buffer/service/context_group.h"
#include "gpu/command_buffer/service/gles2_cmd_decoder.h"
#include "gpu/command_buffer/service/gpu_scheduler.h"
#include "gpu/command_buffer/service/image_manager.h"
#include "gpu/command_buffer/service/mailbox_manager.h"
#include "gpu/command_buffer/service/memory_tracking.h"
#include "mojo/services/gles2/command_buffer_type_conversions.h"
#include "mojo/services/gles2/mojo_buffer_backing.h"
#include "ui/gl/gl_context.h"
#include "ui/gl/gl_surface.h"
namespace mojo {
namespace services {
namespace {
class MemoryTrackerStub : public gpu::gles2::MemoryTracker {
public:
MemoryTrackerStub() {}
virtual void TrackMemoryAllocatedChange(size_t old_size,
size_t new_size,
gpu::gles2::MemoryTracker::Pool pool)
OVERRIDE {}
virtual bool EnsureGPUMemoryAvailable(size_t size_needed) OVERRIDE {
return true;
};
private:
virtual ~MemoryTrackerStub() {}
DISALLOW_COPY_AND_ASSIGN(MemoryTrackerStub);
};
} // anonymous namespace
CommandBufferImpl::CommandBufferImpl(gfx::AcceleratedWidget widget,
const gfx::Size& size)
: widget_(widget), size_(size) {}
CommandBufferImpl::~CommandBufferImpl() {
client()->DidDestroy();
if (decoder_.get()) {
bool have_context = decoder_->MakeCurrent();
decoder_->Destroy(have_context);
}
}
void CommandBufferImpl::OnConnectionError() {
// TODO(darin): How should we handle this error?
}
void CommandBufferImpl::Initialize(
CommandBufferSyncClientPtr sync_client,
mojo::ScopedSharedBufferHandle shared_state) {
sync_client_ = sync_client.Pass();
sync_client_->DidInitialize(DoInitialize(shared_state.Pass()));
}
bool CommandBufferImpl::DoInitialize(
mojo::ScopedSharedBufferHandle shared_state) {
// TODO(piman): offscreen surface.
surface_ = gfx::GLSurface::CreateViewGLSurface(widget_);
if (!surface_.get())
return false;
// TODO(piman): context sharing, virtual contexts, gpu preference.
scoped_refptr<gfx::GLContext> context = gfx::GLContext::CreateGLContext(
NULL, surface_.get(), gfx::PreferIntegratedGpu);
if (!context.get())
return false;
if (!context->MakeCurrent(surface_.get()))
return false;
// TODO(piman): ShaderTranslatorCache is currently per-ContextGroup but
// only needs to be per-thread.
scoped_refptr<gpu::gles2::ContextGroup> context_group =
new gpu::gles2::ContextGroup(NULL,
new MemoryTrackerStub,
new gpu::gles2::ShaderTranslatorCache,
NULL,
true);
command_buffer_.reset(
new gpu::CommandBufferService(context_group->transfer_buffer_manager()));
bool result = command_buffer_->Initialize();
DCHECK(result);
decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group.get()));
scheduler_.reset(new gpu::GpuScheduler(
command_buffer_.get(), decoder_.get(), decoder_.get()));
decoder_->set_engine(scheduler_.get());
decoder_->SetResizeCallback(
base::Bind(&CommandBufferImpl::OnResize, base::Unretained(this)));
gpu::gles2::DisallowedFeatures disallowed_features;
// TODO(piman): attributes.
std::vector<int32> attrib_vector;
if (!decoder_->Initialize(surface_,
context,
false /* offscreen */,
size_,
disallowed_features,
attrib_vector))
return false;
command_buffer_->SetPutOffsetChangeCallback(base::Bind(
&gpu::GpuScheduler::PutChanged, base::Unretained(scheduler_.get())));
command_buffer_->SetGetBufferChangeCallback(base::Bind(
&gpu::GpuScheduler::SetGetBuffer, base::Unretained(scheduler_.get())));
command_buffer_->SetParseErrorCallback(
base::Bind(&CommandBufferImpl::OnParseError, base::Unretained(this)));
// TODO(piman): other callbacks
const size_t kSize = sizeof(gpu::CommandBufferSharedState);
scoped_ptr<gpu::BufferBacking> backing(
gles2::MojoBufferBacking::Create(shared_state.Pass(), kSize));
if (!backing.get())
return false;
command_buffer_->SetSharedStateBuffer(backing.Pass());
return true;
}
void CommandBufferImpl::SetGetBuffer(int32_t buffer) {
command_buffer_->SetGetBuffer(buffer);
}
void CommandBufferImpl::Flush(int32_t put_offset) {
command_buffer_->Flush(put_offset);
}
void CommandBufferImpl::MakeProgress(int32_t last_get_offset) {
// TODO(piman): handle out-of-order.
sync_client_->DidMakeProgress(
CommandBufferState::From(command_buffer_->GetLastState()));
}
void CommandBufferImpl::RegisterTransferBuffer(
int32_t id,
mojo::ScopedSharedBufferHandle transfer_buffer,
uint32_t size) {
// Take ownership of the memory and map it into this process.
// This validates the size.
scoped_ptr<gpu::BufferBacking> backing(
gles2::MojoBufferBacking::Create(transfer_buffer.Pass(), size));
if (!backing.get()) {
DVLOG(0) << "Failed to map shared memory.";
return;
}
command_buffer_->RegisterTransferBuffer(id, backing.Pass());
}
void CommandBufferImpl::DestroyTransferBuffer(int32_t id) {
command_buffer_->DestroyTransferBuffer(id);
}
void CommandBufferImpl::Echo(const Callback<void()>& callback) {
callback.Run();
}
void CommandBufferImpl::RequestAnimationFrames() {
timer_.Start(FROM_HERE,
base::TimeDelta::FromMilliseconds(16),
this,
&CommandBufferImpl::DrawAnimationFrame);
}
void CommandBufferImpl::CancelAnimationFrames() { timer_.Stop(); }
void CommandBufferImpl::OnParseError() {
gpu::CommandBuffer::State state = command_buffer_->GetLastState();
client()->LostContext(state.context_lost_reason);
}
void CommandBufferImpl::DrawAnimationFrame() { client()->DrawAnimationFrame(); }
void CommandBufferImpl::OnResize(gfx::Size size, float scale_factor) {
surface_->Resize(size);
}
} // namespace services
} // namespace mojo
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