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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/surfaces/surfaces_context_provider.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/synchronization/waitable_event.h"
#include "components/mus/gles2/command_buffer_driver.h"
#include "components/mus/gles2/command_buffer_impl.h"
#include "components/mus/gles2/command_buffer_local.h"
#include "components/mus/gles2/gpu_state.h"
#include "components/mus/surfaces/surfaces_context_provider_delegate.h"
#include "gpu/command_buffer/client/gles2_cmd_helper.h"
#include "gpu/command_buffer/client/gles2_implementation.h"
#include "gpu/command_buffer/client/transfer_buffer.h"
namespace mus {
namespace {
const size_t kDefaultCommandBufferSize = 1024 * 1024;
const size_t kDefaultStartTransferBufferSize = 1 * 1024 * 1024;
const size_t kDefaultMinTransferBufferSize = 1 * 256 * 1024;
const size_t kDefaultMaxTransferBufferSize = 16 * 1024 * 1024;
}
SurfacesContextProvider::SurfacesContextProvider(
SurfacesContextProviderDelegate* delegate,
gfx::AcceleratedWidget widget,
const scoped_refptr<GpuState>& state)
: delegate_(delegate), widget_(widget) {
capabilities_.gpu.image = true;
command_buffer_local_.reset(new CommandBufferLocal(this, widget_, state));
}
// This is called when we have an accelerated widget.
bool SurfacesContextProvider::BindToCurrentThread() {
// SurfacesContextProvider should always live on the same thread as the
// View Manager.
DCHECK(CalledOnValidThread());
if (!command_buffer_local_->Initialize())
return false;
gles2_helper_.reset(new gpu::gles2::GLES2CmdHelper(
command_buffer_local_->GetCommandBuffer()));
if (!gles2_helper_->Initialize(kDefaultCommandBufferSize))
return false;
gles2_helper_->SetAutomaticFlushes(false);
transfer_buffer_.reset(new gpu::TransferBuffer(gles2_helper_.get()));
gpu::Capabilities capabilities = command_buffer_local_->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, command_buffer_local_.get()));
return implementation_->Initialize(
kDefaultStartTransferBufferSize, kDefaultMinTransferBufferSize,
kDefaultMaxTransferBufferSize, gpu::gles2::GLES2Implementation::kNoLimit);
}
gpu::gles2::GLES2Interface* SurfacesContextProvider::ContextGL() {
return implementation_.get();
}
gpu::ContextSupport* SurfacesContextProvider::ContextSupport() {
return implementation_.get();
}
class GrContext* SurfacesContextProvider::GrContext() {
return NULL;
}
void SurfacesContextProvider::InvalidateGrContext(uint32_t state) {}
cc::ContextProvider::Capabilities
SurfacesContextProvider::ContextCapabilities() {
return capabilities_;
}
void SurfacesContextProvider::SetupLock() {}
base::Lock* SurfacesContextProvider::GetLock() {
return &context_lock_;
}
bool SurfacesContextProvider::DestroyedOnMainThread() {
return !command_buffer_local_;
}
void SurfacesContextProvider::SetLostContextCallback(
const LostContextCallback& lost_context_callback) {
lost_context_callback_ = lost_context_callback;
}
SurfacesContextProvider::~SurfacesContextProvider() {
implementation_->Flush();
implementation_.reset();
transfer_buffer_.reset();
gles2_helper_.reset();
command_buffer_local_.reset();
}
void SurfacesContextProvider::UpdateVSyncParameters(int64_t timebase,
int64_t interval) {
if (delegate_)
delegate_->OnVSyncParametersUpdated(timebase, interval);
}
void SurfacesContextProvider::DidLoseContext() {
lost_context_callback_.Run();
}
} // namespace mus
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