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// Copyright 2014 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 "components/mus/public/cpp/gles2_context.h"
#include <stddef.h>
#include <stdint.h>
#include <utility>
#include "components/mus/common/gpu_service.h"
#include "components/mus/public/cpp/lib/command_buffer_client_impl.h"
#include "components/mus/public/interfaces/command_buffer.mojom.h"
#include "components/mus/public/interfaces/gpu_service.mojom.h"
#include "gpu/command_buffer/client/gles2_cmd_helper.h"
#include "gpu/command_buffer/client/shared_memory_limits.h"
#include "gpu/command_buffer/client/transfer_buffer.h"
#include "gpu/ipc/client/command_buffer_proxy_impl.h"
#include "mojo/public/cpp/system/core.h"
#include "services/shell/public/cpp/connector.h"
#include "url/gurl.h"
namespace mus {
GLES2Context::GLES2Context() {}
GLES2Context::~GLES2Context() {}
bool GLES2Context::Initialize(const std::vector<int32_t>& attribs,
shell::Connector* connector) {
gpu::CommandBuffer* command_buffer = nullptr;
gpu::GpuControl* gpu_control = nullptr;
// TODO(penghuang): Use type gpu::gles2::ContextCreationAttribHelper for
// attribs.
if (!mus::GpuService::UseChromeGpuCommandBuffer()) {
mojom::GpuPtr gpu;
connector->ConnectToInterface("mojo:mus", &gpu);
mojom::CommandBufferPtr command_buffer_ptr;
gpu->CreateOffscreenGLES2Context(GetProxy(&command_buffer_ptr));
command_buffer_client_impl_.reset(
new CommandBufferClientImpl(attribs, std::move(command_buffer_ptr)));
if (!command_buffer_client_impl_->Initialize())
return false;
command_buffer = command_buffer_client_impl_.get();
gpu_control = command_buffer_client_impl_.get();
} else {
scoped_refptr<gpu::GpuChannelHost> gpu_channel_host =
GpuService::GetInstance()->EstablishGpuChannelSync();
if (!gpu_channel_host)
return false;
gpu::SurfaceHandle surface_handle = gfx::kNullAcceleratedWidget;
// TODO(penghuang): support shared group.
gpu::CommandBufferProxyImpl* shared_command_buffer = nullptr;
gpu::GpuStreamId stream_id = gpu::GpuStreamId::GPU_STREAM_DEFAULT;
gpu::GpuStreamPriority stream_priority = gpu::GpuStreamPriority::NORMAL;
gpu::gles2::ContextCreationAttribHelper attributes;
// TODO(penghuang): figure a useful active_url.
GURL active_url;
scoped_refptr<base::SingleThreadTaskRunner> task_runner =
base::ThreadTaskRunnerHandle::Get();
if (!attributes.Parse(attribs))
return false;
command_buffer_proxy_impl_ = gpu::CommandBufferProxyImpl::Create(
std::move(gpu_channel_host), surface_handle, shared_command_buffer,
stream_id, stream_priority, attributes, active_url,
std::move(task_runner));
if (!command_buffer_proxy_impl_)
return false;
command_buffer = command_buffer_proxy_impl_.get();
gpu_control = command_buffer_proxy_impl_.get();
}
constexpr gpu::SharedMemoryLimits default_limits;
gles2_helper_.reset(new gpu::gles2::GLES2CmdHelper(command_buffer));
if (!gles2_helper_->Initialize(default_limits.command_buffer_size))
return false;
gles2_helper_->SetAutomaticFlushes(false);
transfer_buffer_.reset(new gpu::TransferBuffer(gles2_helper_.get()));
gpu::Capabilities capabilities = gpu_control->GetCapabilities();
bool bind_generates_resource =
!!capabilities.bind_generates_resource_chromium;
// TODO(piman): Some contexts (such as compositor) want this to be true, so
// this needs to be a public parameter.
bool lose_context_when_out_of_memory = false;
bool support_client_side_arrays = false;
implementation_.reset(new gpu::gles2::GLES2Implementation(
gles2_helper_.get(), NULL, transfer_buffer_.get(),
bind_generates_resource, lose_context_when_out_of_memory,
support_client_side_arrays, gpu_control));
if (!implementation_->Initialize(default_limits.start_transfer_buffer_size,
default_limits.min_transfer_buffer_size,
default_limits.max_transfer_buffer_size,
default_limits.mapped_memory_reclaim_limit))
return false;
return true;
}
// static
std::unique_ptr<GLES2Context> GLES2Context::CreateOffscreenContext(
const std::vector<int32_t>& attribs,
shell::Connector* connector) {
std::unique_ptr<GLES2Context> gles2_context(new GLES2Context);
if (!gles2_context->Initialize(attribs, connector))
gles2_context.reset();
return gles2_context;
}
} // namespace mus
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