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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 "base/callback_helpers.h"
#include "webkit/common/gpu/grcontext_for_webgraphicscontext3d.h"
#include "webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h"
namespace webkit {
namespace gpu {
class ContextProviderInProcess::LostContextCallbackProxy
: public WebKit::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_;
};
class ContextProviderInProcess::MemoryAllocationCallbackProxy
: public WebKit::WebGraphicsContext3D::
WebGraphicsMemoryAllocationChangedCallbackCHROMIUM {
public:
explicit MemoryAllocationCallbackProxy(ContextProviderInProcess* provider)
: provider_(provider) {
provider_->context3d_->setMemoryAllocationChangedCallbackCHROMIUM(this);
}
virtual ~MemoryAllocationCallbackProxy() {
provider_->context3d_->setMemoryAllocationChangedCallbackCHROMIUM(NULL);
}
virtual void onMemoryAllocationChanged(
WebKit::WebGraphicsMemoryAllocation alloc) {
provider_->OnMemoryAllocationChanged(!!alloc.gpuResourceSizeInBytes);
}
private:
ContextProviderInProcess* provider_;
};
ContextProviderInProcess::ContextProviderInProcess()
: destroyed_(false) {
DCHECK(main_thread_checker_.CalledOnValidThread());
context_thread_checker_.DetachFromThread();
}
ContextProviderInProcess::~ContextProviderInProcess() {
DCHECK(main_thread_checker_.CalledOnValidThread() ||
context_thread_checker_.CalledOnValidThread());
}
bool ContextProviderInProcess::InitializeOnMainThread() {
DCHECK(!context3d_);
DCHECK(main_thread_checker_.CalledOnValidThread());
WebKit::WebGraphicsContext3D::Attributes attributes;
attributes.depth = false;
attributes.stencil = true;
attributes.antialias = false;
attributes.shareResources = true;
attributes.noAutomaticFlushes = true;
using webkit::gpu::WebGraphicsContext3DInProcessCommandBufferImpl;
context3d_ =
WebGraphicsContext3DInProcessCommandBufferImpl::CreateOffscreenContext(
attributes);
return context3d_;
}
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_->makeContextCurrent())
return false;
lost_context_callback_proxy_.reset(new LostContextCallbackProxy(this));
return true;
}
WebKit::WebGraphicsContext3D* ContextProviderInProcess::Context3d() {
DCHECK(context3d_);
DCHECK(lost_context_callback_proxy_); // Is bound to thread.
DCHECK(context_thread_checker_.CalledOnValidThread());
return context3d_.get();
}
class GrContext* ContextProviderInProcess::GrContext() {
DCHECK(context3d_);
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()));
memory_allocation_callback_proxy_.reset(
new MemoryAllocationCallbackProxy(this));
return gr_context_->get();
}
void ContextProviderInProcess::VerifyContexts() {
DCHECK(context3d_);
DCHECK(lost_context_callback_proxy_); // Is bound to thread.
DCHECK(context_thread_checker_.CalledOnValidThread());
if (context3d_->isContextLost())
OnLostContext();
}
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();
}
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_ = lost_context_callback;
}
void ContextProviderInProcess::OnMemoryAllocationChanged(
bool nonzero_allocation) {
DCHECK(context_thread_checker_.CalledOnValidThread());
if (gr_context_)
gr_context_->SetMemoryLimit(nonzero_allocation);
}
} // namespace gpu
} // namespace webkit
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