Merge Compositor and CompositorCC

ui/gfx/compositor/compositor_cc.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 "ui/gfx/compositor/compositor_cc.h"
-
-#include "base/command_line.h"
-#include "third_party/skia/include/images/SkImageEncoder.h"
-#include "third_party/skia/include/core/SkBitmap.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebCompositor.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebFloatPoint.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebRect.h"
-#include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebSize.h"
-#include "ui/gfx/compositor/compositor_switches.h"
-#include "ui/gfx/compositor/test_web_graphics_context_3d.h"
-#include "ui/gfx/compositor/layer.h"
-#include "ui/gfx/gl/gl_context.h"
-#include "ui/gfx/gl/gl_surface.h"
-#include "ui/gfx/gl/gl_implementation.h"
-#include "ui/gfx/gl/scoped_make_current.h"
-#include "webkit/glue/webthread_impl.h"
-#include "webkit/gpu/webgraphicscontext3d_in_process_impl.h"
-
-namespace {
-
-const double kDefaultRefreshRate = 60.0;
-const double kTestRefreshRate = 100.0;
-
-webkit_glue::WebThreadImpl* g_compositor_thread = NULL;
-
-bool test_compositor_enabled = false;
-
-}  // anonymous namespace
-
-namespace ui {
-
-SharedResourcesCC::SharedResourcesCC() : initialized_(false) {
-}
-
-
-SharedResourcesCC::~SharedResourcesCC() {
-}
-
-// static
-SharedResourcesCC* SharedResourcesCC::GetInstance() {
-  // We use LeakySingletonTraits so that we don't race with
-  // the tear down of the gl_bindings.
-  SharedResourcesCC* instance = Singleton<SharedResourcesCC,
-      LeakySingletonTraits<SharedResourcesCC> >::get();
-  if (instance->Initialize()) {
-    return instance;
-  } else {
-    instance->Destroy();
-    return NULL;
-  }
-}
-
-bool SharedResourcesCC::Initialize() {
-  if (initialized_)
-    return true;
-
-  {
-    // The following line of code exists soley to disable IO restrictions
-    // on this thread long enough to perform the GL bindings.
-    // TODO(wjmaclean) Remove this when GL initialisation cleaned up.
-    base::ThreadRestrictions::ScopedAllowIO allow_io;
-    if (!gfx::GLSurface::InitializeOneOff() ||
-        gfx::GetGLImplementation() == gfx::kGLImplementationNone) {
-      LOG(ERROR) << "Could not load the GL bindings";
-      return false;
-    }
-  }
-
-  surface_ = gfx::GLSurface::CreateOffscreenGLSurface(false, gfx::Size(1, 1));
-  if (!surface_.get()) {
-    LOG(ERROR) << "Unable to create offscreen GL surface.";
-    return false;
-  }
-
-  context_ = gfx::GLContext::CreateGLContext(
-      NULL, surface_.get(), gfx::PreferIntegratedGpu);
-  if (!context_.get()) {
-    LOG(ERROR) << "Unable to create GL context.";
-    return false;
-  }
-
-  initialized_ = true;
-  return true;
-}
-
-void SharedResourcesCC::Destroy() {
-  context_ = NULL;
-  surface_ = NULL;
-
-  initialized_ = false;
-}
-
-gfx::ScopedMakeCurrent* SharedResourcesCC::GetScopedMakeCurrent() {
-  DCHECK(initialized_);
-  if (initialized_)
-    return new gfx::ScopedMakeCurrent(context_.get(), surface_.get());
-  else
-    return NULL;
-}
-
-void* SharedResourcesCC::GetDisplay() {
-  return surface_->GetDisplay();
-}
-
-gfx::GLShareGroup* SharedResourcesCC::GetShareGroup() {
-  DCHECK(initialized_);
-  return context_->share_group();
-}
-
-TextureCC::TextureCC()
-    : texture_id_(0),
-      flipped_(false) {
-}
-
-void TextureCC::SetCanvas(const SkCanvas& canvas,
-                          const gfx::Point& origin,
-                          const gfx::Size& overall_size) {
-  NOTREACHED();
-}
-
-void TextureCC::Draw(const ui::TextureDrawParams& params,
-                     const gfx::Rect& clip_bounds_in_texture) {
-  NOTREACHED();
-}
-
-CompositorCC::CompositorCC(CompositorDelegate* delegate,
-                           gfx::AcceleratedWidget widget,
-                           const gfx::Size& size)
-    : Compositor(delegate, size),
-      widget_(widget),
-      root_web_layer_(WebKit::WebLayer::create()) {
-  WebKit::WebLayerTreeView::Settings settings;
-  CommandLine* command_line = CommandLine::ForCurrentProcess();
-  settings.showFPSCounter =
-      command_line->HasSwitch(switches::kUIShowFPSCounter);
-  settings.showPlatformLayerTree =
-      command_line->HasSwitch(switches::kUIShowLayerTree);
-  settings.refreshRate = test_compositor_enabled ?
-      kTestRefreshRate : kDefaultRefreshRate;
-  settings.partialSwapEnabled =
-      command_line->HasSwitch(switches::kUIEnablePartialSwap);
-
-#ifndef WEBCOMPOSITOR_HAS_INITIALIZE
-  settings.enableCompositorThread = !!g_compositor_thread;
-#endif
-  host_ = WebKit::WebLayerTreeView::create(this, root_web_layer_, settings);
-  root_web_layer_.setAnchorPoint(WebKit::WebFloatPoint(0.f, 0.f));
-  OnWidgetSizeChanged();
-}
-
-CompositorCC::~CompositorCC() {
-  // There's a cycle between |root_web_layer_| and |host_|, which results in
-  // leaking and/or crashing. Explicitly set the root layer to NULL so the cycle
-  // is broken.
-  host_.setRootLayer(NULL);
-}
-
-void CompositorCC::Initialize(bool use_thread) {
-  if (use_thread)
-    g_compositor_thread = new webkit_glue::WebThreadImpl("Browser Compositor");
-#ifdef WEBCOMPOSITOR_HAS_INITIALIZE
-  WebKit::WebCompositor::initialize(g_compositor_thread);
-#else
-  if (use_thread)
-    WebKit::WebCompositor::setThread(g_compositor_thread);
-#endif
-}
-
-void CompositorCC::Terminate() {
-#ifdef WEBCOMPOSITOR_HAS_INITIALIZE
-  WebKit::WebCompositor::shutdown();
-#endif
-  if (g_compositor_thread) {
-    delete g_compositor_thread;
-    g_compositor_thread = NULL;
-  }
-}
-
-Texture* CompositorCC::CreateTexture() {
-  NOTREACHED();
-  return NULL;
-}
-
-void CompositorCC::Blur(const gfx::Rect& bounds) {
-  NOTIMPLEMENTED();
-}
-
-void CompositorCC::ScheduleDraw() {
-  if (g_compositor_thread)
-    host_.composite();
-  else
-    Compositor::ScheduleDraw();
-}
-
-void CompositorCC::OnNotifyStart(bool clear) {
-}
-
-void CompositorCC::OnNotifyEnd() {
-}
-
-void CompositorCC::OnWidgetSizeChanged() {
-  host_.setViewportSize(size());
-  root_web_layer_.setBounds(size());
-}
-
-void CompositorCC::OnRootLayerChanged() {
-  root_web_layer_.removeAllChildren();
-  if (root_layer())
-    root_web_layer_.addChild(root_layer()->web_layer());
-}
-
-void CompositorCC::DrawTree() {
-  host_.composite();
-}
-
-bool CompositorCC::CompositesAsynchronously() {
-  return g_compositor_thread != NULL;
-}
-
-bool CompositorCC::ReadPixels(SkBitmap* bitmap, const gfx::Rect& bounds) {
-  if (bounds.right() > size().width() || bounds.bottom() > size().height())
-    return false;
-  // Convert to OpenGL coordinates.
-  gfx::Point new_origin(bounds.x(),
-                        size().height() - bounds.height() - bounds.y());
-
-  bitmap->setConfig(SkBitmap::kARGB_8888_Config,
-                    bounds.width(), bounds.height());
-  bitmap->allocPixels();
-  SkAutoLockPixels lock_image(*bitmap);
-  unsigned char* pixels = static_cast<unsigned char*>(bitmap->getPixels());
-  if (host_.compositeAndReadback(pixels,
-                                 gfx::Rect(new_origin, bounds.size()))) {
-    SwizzleRGBAToBGRAAndFlip(pixels, bounds.size());
-    return true;
-  }
-  return false;
-}
-
-void CompositorCC::animateAndLayout(double frameBeginTime) {
-}
-
-void CompositorCC::updateAnimations(double frameBeginTime) {
-}
-
-void CompositorCC::layout() {
-}
-
-void CompositorCC::applyScrollAndScale(const WebKit::WebSize& scrollDelta,
-                                       float scaleFactor) {
-}
-
-void CompositorCC::applyScrollDelta(const WebKit::WebSize&) {
-}
-
-WebKit::WebGraphicsContext3D* CompositorCC::createContext3D() {
-  WebKit::WebGraphicsContext3D* context;
-  if (test_compositor_enabled) {
-    // Use context that results in no rendering to the screen.
-    context = new TestWebGraphicsContext3D();
-  } else {
-#if defined(OS_MACOSX) && !defined(USE_AURA)
-    // Non-Aura builds compile this code but doesn't call it. Unfortunately
-    // this is where we translate gfx::AcceleratedWidget to
-    // gfx::PluginWindowHandle, and they are different on non-Aura Mac.
-    // TODO(piman): remove ifdefs when AcceleratedWidget is rationalized on Mac.
-    NOTIMPLEMENTED();
-    return NULL;
-#else
-    gfx::GLShareGroup* share_group =
-        SharedResourcesCC::GetInstance()->GetShareGroup();
-    context = new webkit::gpu::WebGraphicsContext3DInProcessImpl(
-        widget_, share_group);
-#endif
-  }
-  WebKit::WebGraphicsContext3D::Attributes attrs;
-  context->initialize(attrs, 0, true);
-
-  CommandLine* command_line = CommandLine::ForCurrentProcess();
-  if (!command_line->HasSwitch(switches::kDisableUIVsync)) {
-    context->makeContextCurrent();
-    gfx::GLContext* gl_context = gfx::GLContext::GetCurrent();
-    gl_context->SetSwapInterval(1);
-    gl_context->ReleaseCurrent(NULL);
-  }
-
-  return context;
-}
-
-void CompositorCC::didCompleteSwapBuffers() {
-  NotifyEnd();
-}
-
-void CompositorCC::didRebindGraphicsContext(bool success) {
-}
-
-void CompositorCC::scheduleComposite() {
-  ScheduleDraw();
-}
-
-Compositor* Compositor::Create(CompositorDelegate* owner,
-                               gfx::AcceleratedWidget widget,
-                               const gfx::Size& size) {
-  return new CompositorCC(owner, widget, size);
-}
-
-COMPOSITOR_EXPORT void SetupTestCompositor() {
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kDisableTestCompositor)) {
-    test_compositor_enabled = true;
-  }
-}
-
-COMPOSITOR_EXPORT void DisableTestCompositor() {
-  test_compositor_enabled = false;
-}
-
-}  // namespace ui