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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/common/gpu/client/context_provider_command_buffer.h"
#include <stddef.h>
#include <set>
#include <vector>
#include "base/callback_helpers.h"
#include "base/strings/stringprintf.h"
#include "cc/output/managed_memory_policy.h"
#include "content/common/gpu/client/grcontext_for_webgraphicscontext3d.h"
#include "gpu/command_buffer/client/gles2_implementation.h"
#include "third_party/skia/include/gpu/GrContext.h"
namespace content {
class ContextProviderCommandBuffer::LostContextCallbackProxy
: public blink::WebGraphicsContext3D::WebGraphicsContextLostCallback {
public:
explicit LostContextCallbackProxy(ContextProviderCommandBuffer* provider)
: provider_(provider) {
provider_->WebContext3DNoChecks()->setContextLostCallback(this);
}
~LostContextCallbackProxy() override {
provider_->WebContext3DNoChecks()->setContextLostCallback(NULL);
}
void onContextLost() override { provider_->OnLostContext(); }
private:
ContextProviderCommandBuffer* provider_;
};
scoped_refptr<ContextProviderCommandBuffer>
ContextProviderCommandBuffer::Create(
scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context3d,
CommandBufferContextType type) {
if (!context3d)
return NULL;
return new ContextProviderCommandBuffer(context3d.Pass(), type);
}
ContextProviderCommandBuffer::ContextProviderCommandBuffer(
scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context3d,
CommandBufferContextType type)
: context_type_(type),
debug_name_(CommandBufferContextTypeToString(type)) {
gr_interface_ = skia::AdoptRef(new GrGLInterfaceForWebGraphicsContext3D(
context3d.Pass()));
DCHECK(main_thread_checker_.CalledOnValidThread());
DCHECK(gr_interface_->WebContext3D());
context_thread_checker_.DetachFromThread();
}
ContextProviderCommandBuffer::~ContextProviderCommandBuffer() {
DCHECK(main_thread_checker_.CalledOnValidThread() ||
context_thread_checker_.CalledOnValidThread());
// Destroy references to the context3d_ before leaking it.
if (WebContext3DNoChecks()->GetCommandBufferProxy())
WebContext3DNoChecks()->GetCommandBufferProxy()->SetLock(nullptr);
lost_context_callback_proxy_.reset();
}
CommandBufferProxyImpl* ContextProviderCommandBuffer::GetCommandBufferProxy() {
return WebContext3DNoChecks()->GetCommandBufferProxy();
}
WebGraphicsContext3DCommandBufferImpl*
ContextProviderCommandBuffer::WebContext3D() {
DCHECK(gr_interface_);
DCHECK(gr_interface_->WebContext3D());
DCHECK(lost_context_callback_proxy_); // Is bound to thread.
DCHECK(context_thread_checker_.CalledOnValidThread());
return WebContext3DNoChecks();
}
WebGraphicsContext3DCommandBufferImpl*
ContextProviderCommandBuffer::WebContext3DNoChecks() {
DCHECK(gr_interface_);
return static_cast<WebGraphicsContext3DCommandBufferImpl*>(
gr_interface_->WebContext3D());
}
bool ContextProviderCommandBuffer::BindToCurrentThread() {
// This is called on the thread the context will be used.
DCHECK(context_thread_checker_.CalledOnValidThread());
DCHECK(gr_interface_ && gr_interface_->WebContext3D());
if (lost_context_callback_proxy_)
return true;
WebContext3DNoChecks()->SetContextType(context_type_);
if (!WebContext3DNoChecks()->InitializeOnCurrentThread())
return false;
gr_interface_->BindToCurrentThread();
InitializeCapabilities();
std::string unique_context_name =
base::StringPrintf("%s-%p", debug_name_.c_str(), WebContext3DNoChecks());
WebContext3DNoChecks()->traceBeginCHROMIUM("gpu_toplevel",
unique_context_name.c_str());
lost_context_callback_proxy_.reset(new LostContextCallbackProxy(this));
return true;
}
void ContextProviderCommandBuffer::DetachFromThread() {
context_thread_checker_.DetachFromThread();
}
gpu::gles2::GLES2Interface* ContextProviderCommandBuffer::ContextGL() {
DCHECK(lost_context_callback_proxy_); // Is bound to thread.
return WebContext3D()->GetImplementation();
}
gpu::ContextSupport* ContextProviderCommandBuffer::ContextSupport() {
return WebContext3DNoChecks()->GetContextSupport();
}
class GrContext* ContextProviderCommandBuffer::GrContext() {
DCHECK(lost_context_callback_proxy_); // Is bound to thread.
DCHECK(context_thread_checker_.CalledOnValidThread());
if (gr_context_)
return gr_context_->get();
gr_context_.reset(new GrContextForWebGraphicsContext3D(gr_interface_));
// If GlContext is already lost, also abandon the new GrContext.
if (gr_context_->get() &&
ContextGL()->GetGraphicsResetStatusKHR() != GL_NO_ERROR)
gr_context_->get()->abandonContext();
return gr_context_->get();
}
void ContextProviderCommandBuffer::InvalidateGrContext(uint32_t state) {
if (gr_context_) {
DCHECK(lost_context_callback_proxy_); // Is bound to thread.
DCHECK(context_thread_checker_.CalledOnValidThread());
gr_context_->get()->resetContext(state);
}
}
void ContextProviderCommandBuffer::SetupLock() {
WebContext3D()->GetCommandBufferProxy()->SetLock(&context_lock_);
}
base::Lock* ContextProviderCommandBuffer::GetLock() {
return &context_lock_;
}
cc::ContextProvider::Capabilities
ContextProviderCommandBuffer::ContextCapabilities() {
DCHECK(lost_context_callback_proxy_); // Is bound to thread.
DCHECK(context_thread_checker_.CalledOnValidThread());
return capabilities_;
}
void ContextProviderCommandBuffer::DeleteCachedResources() {
DCHECK(context_thread_checker_.CalledOnValidThread());
if (gr_context_)
gr_context_->FreeGpuResources();
}
void ContextProviderCommandBuffer::OnLostContext() {
DCHECK(context_thread_checker_.CalledOnValidThread());
if (!lost_context_callback_.is_null())
base::ResetAndReturn(&lost_context_callback_).Run();
if (gr_context_)
gr_context_->OnLostContext();
}
void ContextProviderCommandBuffer::InitializeCapabilities() {
Capabilities caps;
caps.gpu = WebContext3DNoChecks()->GetImplementation()->capabilities();
size_t mapped_memory_limit = WebContext3DNoChecks()->GetMappedMemoryLimit();
caps.max_transfer_buffer_usage_bytes =
mapped_memory_limit == WebGraphicsContext3DCommandBufferImpl::kNoLimit
? std::numeric_limits<size_t>::max() : mapped_memory_limit;
capabilities_ = caps;
}
void ContextProviderCommandBuffer::SetLostContextCallback(
const LostContextCallback& lost_context_callback) {
DCHECK(context_thread_checker_.CalledOnValidThread());
DCHECK(lost_context_callback_.is_null() ||
lost_context_callback.is_null());
lost_context_callback_ = lost_context_callback;
}
} // namespace content
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