Move SynchronousCompositorFactoryImpl into separate h/cc files

content/browser/android/in_process/synchronous_compositor_factory_impl.cc

+// Copyright 2014 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/android/in_process/synchronous_compositor_factory_impl.h"
+
+#include "content/browser/android/in_process/synchronous_compositor_output_surface.h"
+#include "content/public/browser/browser_thread.h"
+#include "gpu/command_buffer/client/gl_in_process_context.h"
+#include "ui/gl/android/surface_texture.h"
+#include "ui/gl/gl_surface.h"
+#include "webkit/common/gpu/context_provider_in_process.h"
+#include "webkit/common/gpu/webgraphicscontext3d_in_process_command_buffer_impl.h"
+
+namespace content {
+
+namespace {
+
+class VideoContextProvider
+    : public StreamTextureFactorySynchronousImpl::ContextProvider {
+ public:
+  VideoContextProvider(
+      const scoped_refptr<cc::ContextProvider>& context_provider,
+      gpu::GLInProcessContext* gl_in_process_context)
+      : context_provider_(context_provider),
+        gl_in_process_context_(gl_in_process_context) {}
+
+  virtual scoped_refptr<gfx::SurfaceTexture> GetSurfaceTexture(
+      uint32 stream_id) OVERRIDE {
+    return gl_in_process_context_->GetSurfaceTexture(stream_id);
+  }
+
+  virtual blink::WebGraphicsContext3D* Context3d() OVERRIDE {
+    return context_provider_->Context3d();
+  }
+
+ private:
+  friend class base::RefCountedThreadSafe<VideoContextProvider>;
+  virtual ~VideoContextProvider() {}
+
+  scoped_refptr<cc::ContextProvider> context_provider_;
+  gpu::GLInProcessContext* gl_in_process_context_;
+
+  DISALLOW_COPY_AND_ASSIGN(VideoContextProvider);
+};
+
+}  // namespace
+
+using webkit::gpu::WebGraphicsContext3DInProcessCommandBufferImpl;
+
+SynchronousCompositorFactoryImpl::SynchronousCompositorFactoryImpl()
+    : wrapped_gl_context_for_main_thread_(NULL),
+      num_hardware_compositors_(0) {
+  SynchronousCompositorFactory::SetInstance(this);
+}
+
+SynchronousCompositorFactoryImpl::~SynchronousCompositorFactoryImpl() {}
+
+scoped_refptr<base::MessageLoopProxy>
+SynchronousCompositorFactoryImpl::GetCompositorMessageLoop() {
+  return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::UI);
+}
+
+scoped_ptr<cc::OutputSurface>
+SynchronousCompositorFactoryImpl::CreateOutputSurface(int routing_id) {
+  scoped_ptr<SynchronousCompositorOutputSurface> output_surface(
+      new SynchronousCompositorOutputSurface(routing_id));
+  return output_surface.PassAs<cc::OutputSurface>();
+}
+
+InputHandlerManagerClient*
+SynchronousCompositorFactoryImpl::GetInputHandlerManagerClient() {
+  return synchronous_input_event_filter();
+}
+
+scoped_refptr<cc::ContextProvider>
+SynchronousCompositorFactoryImpl::GetOffscreenContextProviderForMainThread() {
+  // This check only guarantees the main thread context is created after
+  // a compositor did successfully initialize hardware draw in the past.
+  // In particular this does not guarantee that the main thread context
+  // will fail creation when all compositors release hardware draw.
+  bool failed = !CanCreateMainThreadContext();
+  if (!failed &&
+      (!offscreen_context_for_main_thread_.get() ||
+       offscreen_context_for_main_thread_->DestroyedOnMainThread())) {
+    offscreen_context_for_main_thread_ =
+        webkit::gpu::ContextProviderInProcess::Create(
+            CreateOffscreenContext(),
+            "Compositor-Offscreen");
+    failed = !offscreen_context_for_main_thread_.get() ||
+             !offscreen_context_for_main_thread_->BindToCurrentThread();
+  }
+
+  if (failed) {
+    offscreen_context_for_main_thread_ = NULL;
+    wrapped_gl_context_for_main_thread_ = NULL;
+  }
+  return offscreen_context_for_main_thread_;
+}
+
+// This is called on both renderer main thread (offscreen context creation
+// path shared between cross-process and in-process platforms) and renderer
+// compositor impl thread (InitializeHwDraw) in order to support Android
+// WebView synchronously enable and disable hardware mode multiple times in
+// the same task. This is ok because in-process WGC3D creation may happen on
+// any thread and is lightweight.
+scoped_refptr<cc::ContextProvider> SynchronousCompositorFactoryImpl::
+    GetOffscreenContextProviderForCompositorThread() {
+  base::AutoLock lock(offscreen_context_for_compositor_thread_lock_);
+  if (!offscreen_context_for_compositor_thread_.get() ||
+      offscreen_context_for_compositor_thread_->DestroyedOnMainThread()) {
+    offscreen_context_for_compositor_thread_ =
+        webkit::gpu::ContextProviderInProcess::CreateOffscreen();
+  }
+  return offscreen_context_for_compositor_thread_;
+}
+
+scoped_ptr<StreamTextureFactory>
+SynchronousCompositorFactoryImpl::CreateStreamTextureFactory(int view_id) {
+  scoped_ptr<StreamTextureFactorySynchronousImpl> factory(
+      new StreamTextureFactorySynchronousImpl(
+          base::Bind(&SynchronousCompositorFactoryImpl::
+                          TryCreateStreamTextureFactory,
+                     base::Unretained(this)),
+          view_id));
+  return factory.PassAs<StreamTextureFactory>();
+}
+
+void SynchronousCompositorFactoryImpl::CompositorInitializedHardwareDraw() {
+  base::AutoLock lock(num_hardware_compositor_lock_);
+  num_hardware_compositors_++;
+}
+
+void SynchronousCompositorFactoryImpl::CompositorReleasedHardwareDraw() {
+  bool should_release_resources = false;
+  {
+    base::AutoLock lock(num_hardware_compositor_lock_);
+    DCHECK_GT(num_hardware_compositors_, 0u);
+    num_hardware_compositors_--;
+    should_release_resources = num_hardware_compositors_ == 0u;
+  }
+  if (should_release_resources)
+    ReleaseGlobalHardwareResources();
+}
+
+void SynchronousCompositorFactoryImpl::ReleaseGlobalHardwareResources() {
+  {
+    base::AutoLock lock(offscreen_context_for_compositor_thread_lock_);
+    offscreen_context_for_compositor_thread_ = NULL;
+  }
+
+  // TODO(boliu): Properly clean up command buffer server of main thread
+  // context here.
+}
+
+bool SynchronousCompositorFactoryImpl::CanCreateMainThreadContext() {
+  base::AutoLock lock(num_hardware_compositor_lock_);
+  return num_hardware_compositors_ > 0;
+}
+
+scoped_refptr<StreamTextureFactorySynchronousImpl::ContextProvider>
+SynchronousCompositorFactoryImpl::TryCreateStreamTextureFactory() {
+  scoped_refptr<StreamTextureFactorySynchronousImpl::ContextProvider>
+      context_provider;
+  if (CanCreateMainThreadContext() &&
+      GetOffscreenContextProviderForMainThread()) {
+    DCHECK(offscreen_context_for_main_thread_);
+    DCHECK(wrapped_gl_context_for_main_thread_);
+    context_provider =
+        new VideoContextProvider(offscreen_context_for_main_thread_,
+                                 wrapped_gl_context_for_main_thread_);
+  }
+  return context_provider;
+}
+
+// TODO(boliu): Deduplicate this with synchronous_compositor_output_surface.cc.
+scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>
+SynchronousCompositorFactoryImpl::CreateOffscreenContext() {
+  if (!gfx::GLSurface::InitializeOneOff())
+    return scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>();
+
+  const gfx::GpuPreference gpu_preference = gfx::PreferDiscreteGpu;
+
+  blink::WebGraphicsContext3D::Attributes attributes;
+  attributes.antialias = false;
+  attributes.shareResources = true;
+  attributes.noAutomaticFlushes = true;
+
+  gpu::GLInProcessContextAttribs in_process_attribs;
+  WebGraphicsContext3DInProcessCommandBufferImpl::ConvertAttributes(
+      attributes, &in_process_attribs);
+  scoped_ptr<gpu::GLInProcessContext> context(
+      gpu::GLInProcessContext::CreateContext(true,
+                                             NULL,
+                                             gfx::Size(1, 1),
+                                             attributes.shareResources,
+                                             in_process_attribs,
+                                             gpu_preference));
+
+  wrapped_gl_context_for_main_thread_ = context.get();
+  if (!context.get())
+    return scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>();
+
+  return scoped_ptr<WebGraphicsContext3DInProcessCommandBufferImpl>(
+      WebGraphicsContext3DInProcessCommandBufferImpl::WrapContext(
+          context.Pass(), attributes));
+}
+
+}  // namespace content