cc: Route offscreen context creation for compositor to the browser.

content/browser/renderer_host/image_transport_factory.cc

 // Copyright (c) 2012 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/browser/renderer_host/image_transport_factory.h"
 
 #include <algorithm>
 #include <map>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/threading/non_thread_safe.h"
 #include "cc/output_surface.h"
 #include "cc/output_surface_client.h"
 #include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/gpu/gpu_surface_tracker.h"
 #include "content/common/gpu/client/gl_helper.h"
 #include "content/common/gpu/client/gpu_channel_host.h"
+#include "content/common/gpu/client/offscreen_context_command_buffer.h"
 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/common/gpu/gpu_process_launch_causes.h"
 #include "content/common/webkitplatformsupport_impl.h"
 #include "content/public/common/content_switches.h"
 #include "gpu/GLES2/gl2extchromium.h"
 #include "gpu/ipc/command_buffer_proxy.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/khronos/GLES2/gl2.h"
 #include "third_party/khronos/GLES2/gl2ext.h"
@@ skipping 183 matching lines @@
 
   virtual void OnViewContextSwapBuffersComplete() OVERRIDE {
     compositor_->OnSwapBuffersComplete();
   }
 
   virtual void OnViewContextSwapBuffersAborted() OVERRIDE {
     // Recreating contexts directly from here causes issues, so post a task
     // instead.
     // TODO(piman): Fix the underlying issues.
     MessageLoop::current()->PostTask(FROM_HERE,
-        base::Bind(&CompositorSwapClient::OnLostContext, this->AsWeakPtr()));
+        base::Bind(&CompositorSwapClient::OnLostSwapContext,
+                   this->AsWeakPtr()));
   }
 
  private:
-  void OnLostContext();
+  void OnLostSwapContext();
   ui::Compositor* compositor_;
   GpuProcessTransportFactory* factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorSwapClient);
 };
 
 class BrowserCompositorOutputSurface;
 
 // Directs vsync updates to the appropriate BrowserCompositorOutputSurface.
 class BrowserCompositorOutputSurfaceProxy
@@ skipping 119 matching lines @@
 
 void BrowserCompositorOutputSurfaceProxy::OnUpdateVSyncParameters(
     int surface_id, base::TimeTicks timebase, base::TimeDelta interval) {
   BrowserCompositorOutputSurface* surface = surface_map_.Lookup(surface_id);
   if (surface)
     surface->OnUpdateVSyncParameters(timebase, interval);
 }
 
 class GpuProcessTransportFactory
     : public ui::ContextFactory,
-      public ImageTransportFactory,
-      public WebKit::WebGraphicsContext3D::WebGraphicsContextLostCallback {
+      public OffscreenContextCommandBufferClient,
+      public ImageTransportFactory {
  public:
   GpuProcessTransportFactory()
-      : ALLOW_THIS_IN_INITIALIZER_LIST(callback_factory_(this)) {
+      : shared_context_main_thread_(this),
+        shared_context_compositor_thread_(this),
+        ALLOW_THIS_IN_INITIALIZER_LIST(callback_factory_(this)) {
     output_surface_proxy_ = new BrowserCompositorOutputSurfaceProxy();
   }
 
   virtual ~GpuProcessTransportFactory() {
     DCHECK(per_compositor_data_.empty());
   }
 
   virtual WebGraphicsContext3DCommandBufferImpl* CreateOffscreenContext()
       OVERRIDE {
     base::WeakPtr<WebGraphicsContext3DSwapBuffersClient> swap_client;
     return CreateContextCommon(swap_client, 0);
   }
 
   virtual cc::OutputSurface* CreateOutputSurface(
       ui::Compositor* compositor) OVERRIDE {
     PerCompositorData* data = per_compositor_data_[compositor];
     if (!data)
       data = CreatePerCompositorData(compositor);
     WebGraphicsContext3DCommandBufferImpl* context =
         CreateContextCommon(data->swap_client->AsWeakPtr(),
                             data->surface_id);
     return new BrowserCompositorOutputSurface(
         context,
         per_compositor_data_[compositor]->surface_id,
         output_surface_proxy_);
   }
 
+  virtual WebKit::WebGraphicsContext3D* OffscreenContextForMainThread()
+      OVERRIDE {
+    return shared_context_main_thread_.Context3d();
+  }
+
+  virtual WebKit::WebGraphicsContext3D*
+      OffscreenContextForCompositorThread() OVERRIDE {
+    return shared_context_compositor_thread_.Context3d();
+  }
+
+  virtual GrContext* OffscreenGrContextForMainThread() OVERRIDE {
+    return shared_context_main_thread_.GrContext();
+  }
+
+  virtual GrContext* OffscreenGrContextForCompositorThread() OVERRIDE {
+    return shared_context_compositor_thread_.GrContext();
+  }
+
   virtual void RemoveCompositor(ui::Compositor* compositor) OVERRIDE {
     PerCompositorDataMap::iterator it = per_compositor_data_.find(compositor);
     if (it == per_compositor_data_.end())
       return;
     PerCompositorData* data = it->second;
     DCHECK(data);
     GpuSurfaceTracker::Get()->RemoveSurface(data->surface_id);
     delete data;
     per_compositor_data_.erase(it);
     if (per_compositor_data_.empty()) {
       gl_helper_.reset();
       callback_factory_.InvalidateWeakPtrs();
     }
   }
 
   virtual ui::ContextFactory* AsContextFactory() OVERRIDE {
     return this;
   }
 
   virtual gfx::GLSurfaceHandle CreateSharedSurfaceHandle() OVERRIDE {
-    CreateSharedContextLazy();
     gfx::GLSurfaceHandle handle = gfx::GLSurfaceHandle(
         gfx::kNullPluginWindow, true);
-    handle.parent_gpu_process_id = shared_context_->GetGPUProcessID();
-    handle.parent_client_id = shared_context_->GetChannelID();
-
+    handle.parent_gpu_process_id =
+        shared_context_main_thread_.Context3d()->GetGPUProcessID();
+    handle.parent_client_id =
+        shared_context_main_thread_.Context3d()->GetChannelID();
     return handle;
   }
 
   virtual void DestroySharedSurfaceHandle(
       gfx::GLSurfaceHandle surface) OVERRIDE {
   }
 
   virtual scoped_refptr<ui::Texture> CreateTransportClient(
       float device_scale_factor) {
-    if (!shared_context_.get())
+    if (!shared_context_main_thread_.Context3d())
         return NULL;
     scoped_refptr<ImageTransportClientTexture> image(
-        new ImageTransportClientTexture(shared_context_.get(),
-                                        device_scale_factor));
+        new ImageTransportClientTexture(
+            shared_context_main_thread_.Context3d(),
+            device_scale_factor));
     return image;
   }
 
   virtual scoped_refptr<ui::Texture> CreateOwnedTexture(
       const gfx::Size& size,
       float device_scale_factor,
       unsigned int texture_id) OVERRIDE {
-    if (!shared_context_.get())
-        return NULL;
-    scoped_refptr<OwnedTexture> image(
-        new OwnedTexture(shared_context_.get(), size, device_scale_factor,
-                         texture_id));
+    if (!shared_context_main_thread_.Context3d())
+      return NULL;
+    scoped_refptr<OwnedTexture> image(new OwnedTexture(
+        shared_context_main_thread_.Context3d(),
+        size,
+        device_scale_factor,
+        texture_id));
     return image;
   }
 
   virtual GLHelper* GetGLHelper() {
     if (!gl_helper_.get()) {
-      CreateSharedContextLazy();
-      WebKit::WebGraphicsContext3D* context_for_thread =
+      WebGraphicsContext3DCommandBufferImpl* main_thread_context =
+          shared_context_main_thread_.Context3d();
+      if (!main_thread_context)
+        return NULL;
+      WebGraphicsContext3DCommandBufferImpl* helper_thread_context =
           CreateOffscreenContext();
-      if (!context_for_thread)
+      if (!helper_thread_context)
         return NULL;
-      gl_helper_.reset(new GLHelper(shared_context_.get(),
-                                    context_for_thread));
+      gl_helper_.reset(new GLHelper(main_thread_context,
+                                    helper_thread_context));
     }
     return gl_helper_.get();
   }
 
   virtual uint32 InsertSyncPoint() OVERRIDE {
-    if (!shared_context_.get())
+    if (!shared_context_main_thread_.Context3d())
       return 0;
-    return shared_context_->insertSyncPoint();
+    return shared_context_main_thread_.Context3d()->
+        insertSyncPoint();
   }
 
   virtual void AddObserver(ImageTransportFactoryObserver* observer) {
     observer_list_.AddObserver(observer);
   }
 
   virtual void RemoveObserver(ImageTransportFactoryObserver* observer) {
     observer_list_.RemoveObserver(observer);
   }
 
-  // WebGraphicsContextLostCallback implementation, called for the shared
-  // context.
-  virtual void onContextLost() {
-    MessageLoop::current()->PostTask(
-        FROM_HERE,
-        base::Bind(&GpuProcessTransportFactory::OnLostSharedContext,
-                   callback_factory_.GetWeakPtr()));
+  // OffscreenContextCommandBufferClient implementation.
+  virtual void DidCreateContext(
+      OffscreenContextCommandBuffer* offscreen_context,
+      bool success) OVERRIDE {
+    if (success)
+      return;
+    if (offscreen_context == &shared_context_main_thread_) {
+      // If we can't recreate contexts, we won't be able to show the UI. Better
+      // crash at this point.
+      LOG(FATAL) << "Failed to initialize UI shared main thread context.";
+    }
   }
 
-  void OnLostContext(ui::Compositor* compositor) {
+  // OffscreenContextCommandBufferClient implementation.
+  virtual void DidLoseContext(OffscreenContextCommandBuffer* offscreen_context)
+      OVERRIDE {
+    if (offscreen_context == &shared_context_main_thread_) {
+      MessageLoop::current()->PostTask(
+          FROM_HERE,
+          base::Bind(&GpuProcessTransportFactory::OnLostMainThreadSharedContext,
+                     callback_factory_.GetWeakPtr(),
+                     base::Unretained(offscreen_context)));
+    }
+  }
+
+  void OnLostSwapContext(ui::Compositor* compositor) {
     LOG(ERROR) << "Lost UI compositor context.";
     PerCompositorData* data = per_compositor_data_[compositor];
     DCHECK(data);
 
     // Prevent callbacks from other contexts in the same share group from
     // calling us again.
     data->swap_client.reset(new CompositorSwapClient(compositor, this));
     compositor->OnSwapBuffersAborted();
   }
 
  private:
   struct PerCompositorData {
     int surface_id;
     scoped_ptr<CompositorSwapClient> swap_client;
 #if defined(OS_WIN)
     scoped_ptr<AcceleratedSurface> accelerated_surface;
 #endif
   };
 
   PerCompositorData* CreatePerCompositorData(ui::Compositor* compositor) {
     DCHECK(!per_compositor_data_[compositor]);
 
-    CreateSharedContextLazy();
-
     gfx::AcceleratedWidget widget = compositor->widget();
     GpuSurfaceTracker* tracker = GpuSurfaceTracker::Get();
 
     PerCompositorData* data = new PerCompositorData;
     data->surface_id = tracker->AddSurfaceForNativeWidget(widget);
     data->swap_client.reset(new CompositorSwapClient(compositor, this));
 #if defined(OS_WIN)
     if (GpuDataManagerImpl::GetInstance()->IsUsingAcceleratedSurface())
       data->accelerated_surface.reset(new AcceleratedSurface(widget));
 #endif
@@ skipping 24 matching lines @@
             factory,
             swap_client));
     if (!context->Initialize(
         attrs,
         false,
         CAUSE_FOR_GPU_LAUNCH_WEBGRAPHICSCONTEXT3DCOMMANDBUFFERIMPL_INITIALIZE))
       return NULL;
     return context.release();
   }
 
-  void CreateSharedContextLazy() {
-    if (shared_context_.get())
-      return;
-
-    shared_context_.reset(CreateOffscreenContext());
-    if (!shared_context_.get()) {
-      // If we can't recreate contexts, we won't be able to show the UI. Better
-      // crash at this point.
-      LOG(FATAL) << "Failed to initialize UI shared context.";
-    }
-    if (!shared_context_->makeContextCurrent()) {
-      // If we can't recreate contexts, we won't be able to show the UI. Better
-      // crash at this point.
-      LOG(FATAL) << "Failed to make UI shared context current.";
-    }
-    shared_context_->setContextLostCallback(this);
-  }
-
-  void OnLostSharedContext() {
-    // Keep old resources around while we call the observers, but ensure that
-    // new resources are created if needed.
-    scoped_ptr<WebGraphicsContext3DCommandBufferImpl> old_shared_context(
-        shared_context_.release());
-    scoped_ptr<GLHelper> old_helper(gl_helper_.release());
-
+  void OnLostMainThreadSharedContext(
+      OffscreenContextCommandBuffer* offscreen_contxt) {
     FOR_EACH_OBSERVER(ImageTransportFactoryObserver,
         observer_list_,
         OnLostResources());
   }
 
   typedef std::map<ui::Compositor*, PerCompositorData*> PerCompositorDataMap;
   PerCompositorDataMap per_compositor_data_;
-  scoped_ptr<WebGraphicsContext3DCommandBufferImpl> shared_context_;
+  OffscreenContextCommandBuffer shared_context_main_thread_;
+  OffscreenContextCommandBuffer shared_context_compositor_thread_;
   scoped_ptr<GLHelper> gl_helper_;
   ObserverList<ImageTransportFactoryObserver> observer_list_;
   base::WeakPtrFactory<GpuProcessTransportFactory> callback_factory_;
   scoped_refptr<BrowserCompositorOutputSurfaceProxy> output_surface_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuProcessTransportFactory);
 };
 
-void CompositorSwapClient::OnLostContext() {
-  factory_->OnLostContext(compositor_);
+void CompositorSwapClient::OnLostSwapContext() {
+  factory_->OnLostSwapContext(compositor_);
   // Note: previous line destroyed this. Don't access members from now on.
 }
 
 WebKit::WebGraphicsContext3D* CreateTestContext() {
   ui::TestWebGraphicsContext3D* test_context =
       new ui::TestWebGraphicsContext3D();
   test_context->Initialize();
   return test_context;
 }
 
@@ skipping 21 matching lines @@
   delete g_factory;
   g_factory = NULL;
 }
 
 // static
 ImageTransportFactory* ImageTransportFactory::GetInstance() {
   return g_factory;
 }
 
 }  // namespace content