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// Copyright 2015 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 "android_webview/browser/aw_render_thread_context_provider.h"
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/lazy_instance.h"
#include "base/trace_event/trace_event.h"
#include "cc/output/managed_memory_policy.h"
#include "gpu/blink/webgraphicscontext3d_impl.h"
#include "gpu/command_buffer/client/gl_in_process_context.h"
#include "gpu/command_buffer/client/gles2_implementation.h"
#include "gpu/command_buffer/client/gles2_lib.h"
#include "gpu/skia_bindings/gl_bindings_skia_cmd_buffer.h"
#include "third_party/skia/include/gpu/GrContext.h"
#include "third_party/skia/include/gpu/gl/GrGLInterface.h"
namespace android_webview {
namespace {
// Singleton used to initialize and terminate the gles2 library.
class GLES2Initializer {
public:
GLES2Initializer() { gles2::Initialize(); }
~GLES2Initializer() { gles2::Terminate(); }
private:
DISALLOW_COPY_AND_ASSIGN(GLES2Initializer);
};
base::LazyInstance<GLES2Initializer> g_gles2_initializer =
LAZY_INSTANCE_INITIALIZER;
} // namespace
// static
scoped_refptr<AwRenderThreadContextProvider>
AwRenderThreadContextProvider::Create(
scoped_refptr<gfx::GLSurface> surface,
scoped_refptr<gpu::InProcessCommandBuffer::Service> service) {
return new AwRenderThreadContextProvider(surface, service);
}
AwRenderThreadContextProvider::AwRenderThreadContextProvider(
scoped_refptr<gfx::GLSurface> surface,
scoped_refptr<gpu::InProcessCommandBuffer::Service> service)
: destroyed_(false) {
DCHECK(main_thread_checker_.CalledOnValidThread());
blink::WebGraphicsContext3D::Attributes attributes;
attributes.antialias = false;
attributes.depth = false;
attributes.stencil = false;
attributes.shareResources = true;
attributes.noAutomaticFlushes = true;
gpu::gles2::ContextCreationAttribHelper attribs_for_gles2;
gpu_blink::WebGraphicsContext3DImpl::ConvertAttributes(attributes,
&attribs_for_gles2);
attribs_for_gles2.lose_context_when_out_of_memory = true;
context_.reset(gpu::GLInProcessContext::Create(
service,
surface,
surface->IsOffscreen(),
gfx::kNullAcceleratedWidget,
surface->GetSize(),
NULL /* share_context */,
false /* share_resources */,
attribs_for_gles2,
gfx::PreferDiscreteGpu,
gpu::GLInProcessContextSharedMemoryLimits(),
nullptr,
nullptr));
context_->SetContextLostCallback(base::Bind(
&AwRenderThreadContextProvider::OnLostContext, base::Unretained(this)));
capabilities_.gpu = context_->GetImplementation()->capabilities();
}
AwRenderThreadContextProvider::~AwRenderThreadContextProvider() {
DCHECK(main_thread_checker_.CalledOnValidThread());
}
bool AwRenderThreadContextProvider::BindToCurrentThread() {
// This is called on the thread the context will be used.
DCHECK(main_thread_checker_.CalledOnValidThread());
return true;
}
cc::ContextProvider::Capabilities
AwRenderThreadContextProvider::ContextCapabilities() {
DCHECK(main_thread_checker_.CalledOnValidThread());
return capabilities_;
}
gpu::gles2::GLES2Interface* AwRenderThreadContextProvider::ContextGL() {
DCHECK(main_thread_checker_.CalledOnValidThread());
return context_->GetImplementation();
}
gpu::ContextSupport* AwRenderThreadContextProvider::ContextSupport() {
DCHECK(main_thread_checker_.CalledOnValidThread());
return context_->GetImplementation();
}
static void BindGrContextCallback(const GrGLInterface* interface) {
cc::ContextProvider* context_provider =
reinterpret_cast<AwRenderThreadContextProvider*>(
interface->fCallbackData);
gles2::SetGLContext(context_provider->ContextGL());
}
class GrContext* AwRenderThreadContextProvider::GrContext() {
DCHECK(main_thread_checker_.CalledOnValidThread());
if (gr_context_)
return gr_context_.get();
// The GrGLInterface factory will make GL calls using the C GLES2 interface.
// Make sure the gles2 library is initialized first on exactly one thread.
g_gles2_initializer.Get();
gles2::SetGLContext(ContextGL());
skia::RefPtr<GrGLInterface> interface =
skia::AdoptRef(skia_bindings::CreateCommandBufferSkiaGLBinding());
interface->fCallback = BindGrContextCallback;
interface->fCallbackData = reinterpret_cast<GrGLInterfaceCallbackData>(this);
gr_context_ = skia::AdoptRef(GrContext::Create(
kOpenGL_GrBackend, reinterpret_cast<GrBackendContext>(interface.get())));
return gr_context_.get();
}
void AwRenderThreadContextProvider::InvalidateGrContext(uint32_t state) {
DCHECK(main_thread_checker_.CalledOnValidThread());
if (gr_context_)
gr_context_.get()->resetContext(state);
}
void AwRenderThreadContextProvider::SetupLock() {
context_->SetLock(&context_lock_);
}
base::Lock* AwRenderThreadContextProvider::GetLock() {
return &context_lock_;
}
bool AwRenderThreadContextProvider::IsContextLost() {
DCHECK(main_thread_checker_.CalledOnValidThread());
return destroyed_;
}
void AwRenderThreadContextProvider::VerifyContexts() {
}
void AwRenderThreadContextProvider::DeleteCachedResources() {
DCHECK(main_thread_checker_.CalledOnValidThread());
if (gr_context_) {
TRACE_EVENT_INSTANT0("gpu", "GrContext::freeGpuResources",
TRACE_EVENT_SCOPE_THREAD);
gr_context_->freeGpuResources();
}
}
bool AwRenderThreadContextProvider::DestroyedOnMainThread() {
DCHECK(main_thread_checker_.CalledOnValidThread());
return destroyed_;
}
void AwRenderThreadContextProvider::SetLostContextCallback(
const LostContextCallback& lost_context_callback) {
lost_context_callback_ = lost_context_callback;
}
void AwRenderThreadContextProvider::SetMemoryPolicyChangedCallback(
const MemoryPolicyChangedCallback& memory_policy_changed_callback) {
// There's no memory manager for the in-process implementation.
}
void AwRenderThreadContextProvider::OnLostContext() {
DCHECK(main_thread_checker_.CalledOnValidThread());
if (destroyed_)
return;
destroyed_ = true;
if (!lost_context_callback_.is_null())
base::ResetAndReturn(&lost_context_callback_).Run();
if (gr_context_)
gr_context_->abandonContext();
}
} // namespace android_webview
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