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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 "webkit/common/gpu/context_provider_in_process.h"
#include <set>
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/strings/string_split.h"
#include "base/strings/stringprintf.h"
#include "cc/output/managed_memory_policy.h"
#include "gpu/command_buffer/client/gles2_implementation.h"
#include "webkit/common/gpu/grcontext_for_webgraphicscontext3d.h"
namespace webkit {
namespace gpu {
class ContextProviderInProcess::LostContextCallbackProxy
: public blink::WebGraphicsContext3D::WebGraphicsContextLostCallback {
public:
explicit LostContextCallbackProxy(ContextProviderInProcess* provider)
: provider_(provider) {
provider_->context3d_->setContextLostCallback(this);
}
virtual ~LostContextCallbackProxy() {
provider_->context3d_->setContextLostCallback(NULL);
}
virtual void onContextLost() {
provider_->OnLostContext();
}
private:
ContextProviderInProcess* provider_;
};
// static
scoped_refptr<ContextProviderInProcess> ContextProviderInProcess::Create(
scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl> context3d,
const std::string& debug_name) {
if (!context3d)
return NULL;
return new ContextProviderInProcess(context3d.Pass(), debug_name);
}
// static
scoped_refptr<ContextProviderInProcess>
ContextProviderInProcess::CreateOffscreen(
bool lose_context_when_out_of_memory) {
blink::WebGraphicsContext3D::Attributes attributes;
attributes.depth = false;
attributes.stencil = true;
attributes.antialias = false;
attributes.shareResources = true;
attributes.noAutomaticFlushes = true;
return Create(
WebGraphicsContext3DInProcessCommandBufferImpl::CreateOffscreenContext(
attributes, lose_context_when_out_of_memory),
"Offscreen");
}
ContextProviderInProcess::ContextProviderInProcess(
scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl> context3d,
const std::string& debug_name)
: context3d_(context3d.Pass()),
destroyed_(false),
debug_name_(debug_name) {
DCHECK(main_thread_checker_.CalledOnValidThread());
DCHECK(context3d_);
context_thread_checker_.DetachFromThread();
}
ContextProviderInProcess::~ContextProviderInProcess() {
DCHECK(main_thread_checker_.CalledOnValidThread() ||
context_thread_checker_.CalledOnValidThread());
}
blink::WebGraphicsContext3D* ContextProviderInProcess::WebContext3D() {
DCHECK(lost_context_callback_proxy_); // Is bound to thread.
DCHECK(context_thread_checker_.CalledOnValidThread());
return context3d_.get();
}
bool ContextProviderInProcess::BindToCurrentThread() {
DCHECK(context3d_);
// This is called on the thread the context will be used.
DCHECK(context_thread_checker_.CalledOnValidThread());
if (lost_context_callback_proxy_)
return true;
if (!context3d_->InitializeOnCurrentThread())
return false;
InitializeCapabilities();
std::string unique_context_name =
base::StringPrintf("%s-%p", debug_name_.c_str(), context3d_.get());
context3d_->traceBeginCHROMIUM("gpu_toplevel",
unique_context_name.c_str());
lost_context_callback_proxy_.reset(new LostContextCallbackProxy(this));
return true;
}
void ContextProviderInProcess::InitializeCapabilities() {
capabilities_.gpu = context3d_->GetImplementation()->capabilities();
size_t mapped_memory_limit = context3d_->GetMappedMemoryLimit();
capabilities_.max_transfer_buffer_usage_bytes =
mapped_memory_limit ==
WebGraphicsContext3DInProcessCommandBufferImpl::kNoLimit
? std::numeric_limits<size_t>::max()
: mapped_memory_limit;
}
cc::ContextProvider::Capabilities
ContextProviderInProcess::ContextCapabilities() {
DCHECK(lost_context_callback_proxy_); // Is bound to thread.
DCHECK(context_thread_checker_.CalledOnValidThread());
return capabilities_;
}
::gpu::gles2::GLES2Interface* ContextProviderInProcess::ContextGL() {
DCHECK(context3d_);
DCHECK(lost_context_callback_proxy_); // Is bound to thread.
DCHECK(context_thread_checker_.CalledOnValidThread());
return context3d_->GetGLInterface();
}
::gpu::ContextSupport* ContextProviderInProcess::ContextSupport() {
DCHECK(context3d_);
if (!lost_context_callback_proxy_)
return NULL; // Not bound to anything.
DCHECK(context_thread_checker_.CalledOnValidThread());
return context3d_->GetContextSupport();
}
class GrContext* ContextProviderInProcess::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 webkit::gpu::GrContextForWebGraphicsContext3D(context3d_.get()));
return gr_context_->get();
}
bool ContextProviderInProcess::IsContextLost() {
DCHECK(lost_context_callback_proxy_); // Is bound to thread.
DCHECK(context_thread_checker_.CalledOnValidThread());
return context3d_->isContextLost();
}
void ContextProviderInProcess::VerifyContexts() {
DCHECK(lost_context_callback_proxy_); // Is bound to thread.
DCHECK(context_thread_checker_.CalledOnValidThread());
if (context3d_->isContextLost())
OnLostContext();
}
void ContextProviderInProcess::DeleteCachedResources() {
DCHECK(context_thread_checker_.CalledOnValidThread());
if (gr_context_)
gr_context_->FreeGpuResources();
}
void ContextProviderInProcess::OnLostContext() {
DCHECK(context_thread_checker_.CalledOnValidThread());
{
base::AutoLock lock(destroyed_lock_);
if (destroyed_)
return;
destroyed_ = true;
}
if (!lost_context_callback_.is_null())
base::ResetAndReturn(&lost_context_callback_).Run();
if (gr_context_)
gr_context_->OnLostContext();
}
bool ContextProviderInProcess::DestroyedOnMainThread() {
DCHECK(main_thread_checker_.CalledOnValidThread());
base::AutoLock lock(destroyed_lock_);
return destroyed_;
}
void ContextProviderInProcess::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;
}
void ContextProviderInProcess::SetMemoryPolicyChangedCallback(
const MemoryPolicyChangedCallback& memory_policy_changed_callback) {
// There's no memory manager for the in-process implementation.
}
} // namespace gpu
} // namespace webkit
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