Add window manager component.

wm/gpu/foreign_window_texture_factory.cc

+// 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 "wm/gpu/foreign_window_texture_factory.h"
+
+#include "base/lazy_instance.h"
+#include "base/observer_list.h"
+#include "content/browser/gpu/browser_gpu_channel_host_factory.h"
+#include "content/common/gpu/client/gl_helper.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
+#include "third_party/khronos/GLES2/gl2.h"
+#include "ui/compositor/compositor_setup.h"
+
+namespace {
+
+class DefaultGpuChannelHostFactory : public content::GpuChannelHostFactory {
+ public:
+  DefaultGpuChannelHostFactory() {}
+
+  virtual bool IsMainThread() OVERRIDE {
+    return false;
+  }
+  virtual bool IsIOThread() OVERRIDE {
+    return false;
+  }
+  virtual MessageLoop* GetMainLoop() OVERRIDE {
+    return NULL;
+  }
+  virtual scoped_refptr<base::MessageLoopProxy> GetIOLoopProxy() OVERRIDE {
+    return NULL;
+  }
+  virtual base::WaitableEvent* GetShutDownEvent() OVERRIDE { return NULL; }
+  virtual scoped_ptr<base::SharedMemory> AllocateSharedMemory(
+      size_t size) OVERRIDE {
+    return scoped_ptr<base::SharedMemory>();
+  }
+  virtual int32 CreateViewCommandBuffer(
+      int32 surface_id,
+      const GPUCreateCommandBufferConfig& init_params) OVERRIDE {
+    return 0;
+  }
+  virtual content::GpuChannelHost* EstablishGpuChannelSync(
+      content::CauseForGpuLaunch) OVERRIDE {
+    return NULL;
+  }
+  virtual void CreateImage(
+      gfx::PluginWindowHandle window_handle,
+      int32 image_id,
+      const CreateImageCallback& callback) OVERRIDE {
+    callback.Run(gfx::Size());
+  }
+  virtual void DeleteImage(int32 image_id, int32 sync_point) OVERRIDE {}
+};
+
+base::LazyInstance<DefaultGpuChannelHostFactory> g_default_factory =
+    LAZY_INSTANCE_INITIALIZER;
+
+}  // namespace
+
+namespace wm {
+
+// static
+ForeignWindowTextureFactory* ForeignWindowTextureFactory::instance_ = NULL;
+
+ForeignWindowTexture::ForeignWindowTexture(
+    content::GpuChannelHostFactory* factory,
+    WebKit::WebGraphicsContext3D* host_context,
+    bool flipped,
+    const gfx::Size& size,
+    float device_scale_factor,
+    int32 image_id)
+    : ui::Texture(flipped, size, device_scale_factor),
+      factory_(factory),
+      host_context_(host_context),
+      image_id_(image_id),
+      texture_id_(0),
+      contents_changed_(true) {
+  ForeignWindowTextureFactory::GetInstance()->AddObserver(this);
+}
+
+ForeignWindowTexture::~ForeignWindowTexture() {
+  ForeignWindowTextureFactory::GetInstance()->RemoveObserver(this);
+  if (texture_id_)
+    host_context_->deleteTexture(texture_id_);
+  if (image_id_ && !host_context_->isContextLost()) {
+    factory_->DeleteImage(image_id_,
+                          texture_id_ ? host_context_->insertSyncPoint() : 0);
+  }
+}
+
+unsigned int ForeignWindowTexture::PrepareTexture() {
+  if (contents_changed_) {
+    unsigned texture_id = texture_id_;
+
+    if (!texture_id)
+      texture_id = host_context_->createTexture();
+
+    host_context_->bindTexture(GL_TEXTURE_2D, texture_id);
+    if (texture_id_)
+      host_context_->releaseTexImage2DCHROMIUM(GL_TEXTURE_2D, image_id_);
+    host_context_->bindTexImage2DCHROMIUM(GL_TEXTURE_2D, image_id_);
+    host_context_->bindTexture(GL_TEXTURE_2D, 0);
+    host_context_->flush();
+
+    texture_id_ = texture_id;
+    contents_changed_ = false;
+  }
+
+  return texture_id_;
+}
+
+WebKit::WebGraphicsContext3D* ForeignWindowTexture::HostContext3D() {
+  DCHECK(host_context_);  // This should never be called after lost context.
+  return host_context_;
+}
+
+void ForeignWindowTexture::OnLostResources() {
+  if (texture_id_) {
+    host_context_->deleteTexture(texture_id_);
+    texture_id_ = 0;
+  }
+  contents_changed_ = false;
+  image_id_ = 0;
+  host_context_ = NULL;
+}
+
+void ForeignWindowTexture::OnContentsChanged() {
+  if (image_id_)
+    contents_changed_ = true;
+}
+
+ForeignWindowTextureFactory::ForeignWindowTextureFactory(
+    content::GpuChannelHostFactory* factory) : factory_(factory) {
+  DCHECK(factory);
+  DCHECK(content::ImageTransportFactory::GetInstance());
+  content::ImageTransportFactory::GetInstance()->AddObserver(this);
+}
+
+ForeignWindowTextureFactory::~ForeignWindowTextureFactory() {
+  content::ImageTransportFactory::GetInstance()->RemoveObserver(this);
+}
+
+void ForeignWindowTextureFactory::OnLostResources() {
+  content::ImageTransportFactory* transport_factory =
+      content::ImageTransportFactory::GetInstance();
+  // Make sure a new gpu channel is established before any calls to
+  // CreateTextureForForeignWindow() are made.
+  WebKit::WebGraphicsContext3D* context =
+      transport_factory->GetGLHelper()->context();
+  CHECK(context);
+
+  FOR_EACH_OBSERVER(ForeignWindowTextureFactoryObserver,
+                    observer_list_,
+                    OnLostResources());
+}
+
+void ForeignWindowTextureFactory::CreateTextureForForeignWindow(
+    gfx::PluginWindowHandle window_handle,
+    bool flipped,
+    float device_scale_factor,
+    const CreateTextureCallback& callback) {
+  DCHECK(window_handle);
+
+  int32 image_id = GenerateImageID();
+  factory_->CreateImage(
+      window_handle,
+      image_id,
+      base::Bind(&ForeignWindowTextureFactory::OnImageCreated,
+                 base::Unretained(this),
+                 callback,
+                 flipped,
+                 device_scale_factor,
+                 image_id));
+}
+
+void ForeignWindowTextureFactory::AddObserver(
+    ForeignWindowTextureFactoryObserver* observer) {
+  observer_list_.AddObserver(observer);
+}
+
+void ForeignWindowTextureFactory::RemoveObserver(
+    ForeignWindowTextureFactoryObserver* observer) {
+  observer_list_.RemoveObserver(observer);
+}
+
+int ForeignWindowTextureFactory::GenerateImageID() {
+  static unsigned int image_id = 0;
+  return ++image_id;
+}
+
+void ForeignWindowTextureFactory::OnImageCreated(
+    const CreateTextureCallback& callback,
+    bool flipped,
+    float device_scale_factor,
+    int32 image_id,
+    const gfx::Size size) {
+  if (size.IsEmpty()) {
+    callback.Run(NULL);
+    return;
+  }
+
+  content::ImageTransportFactory* transport_factory =
+      content::ImageTransportFactory::GetInstance();
+  scoped_refptr<ForeignWindowTexture> texture(
+      new ForeignWindowTexture(factory_,
+                               transport_factory->GetGLHelper()->context(),
+                               flipped,
+                               size,
+                               device_scale_factor,
+                               image_id));
+
+  callback.Run(texture);
+}
+
+// static
+void ForeignWindowTextureFactory::Initialize() {
+  CHECK(!instance_);
+  if (ui::IsTestCompositorEnabled()) {
+    instance_ = new ForeignWindowTextureFactory(&g_default_factory.Get());
+  } else {
+    instance_ = new ForeignWindowTextureFactory(
+        content::BrowserGpuChannelHostFactory::instance());
+  }
+}
+
+// static
+void ForeignWindowTextureFactory::Terminate() {
+  CHECK(instance_);
+  delete instance_;
+  instance_ = NULL;
+}
+
+// static
+ForeignWindowTextureFactory* ForeignWindowTextureFactory::GetInstance() {
+  DCHECK(instance_);
+  return instance_;
+}
+
+}  // namespace wm