ui: Move compositor/ directory out of gfx/, up to ui/.

ui/gfx/compositor/compositor.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.h"
-
-#include "base/command_line.h"
-#include "base/threading/thread_restrictions.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 "third_party/skia/include/core/SkBitmap.h"
-#include "third_party/skia/include/images/SkImageEncoder.h"
-#include "ui/gfx/compositor/compositor_observer.h"
-#include "ui/gfx/compositor/compositor_switches.h"
-#include "ui/gfx/compositor/layer.h"
-#include "ui/gfx/compositor/test_web_graphics_context_3d.h"
-#include "ui/gfx/gl/gl_context.h"
-#include "ui/gfx/gl/gl_implementation.h"
-#include "ui/gfx/gl/gl_surface.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;
-
-ui::ContextFactory* g_context_factory = NULL;
-
-}  // anonymous namespace
-
-namespace ui {
-
-// static
-ContextFactory* ContextFactory::GetInstance() {
-  // We leak the shared resources so that we don't race with
-  // the tear down of the gl_bindings.
-  if (!g_context_factory) {
-    DVLOG(1) << "Using DefaultSharedResource";
-    scoped_ptr<DefaultContextFactory> instance(
-        new DefaultContextFactory());
-    if (instance->Initialize())
-      g_context_factory = instance.release();
-  }
-  return g_context_factory;
-}
-
-// static
-void ContextFactory::SetInstance(ContextFactory* instance) {
-  g_context_factory = instance;
-}
-
-DefaultContextFactory::DefaultContextFactory() {
-}
-
-DefaultContextFactory::~DefaultContextFactory() {
-}
-
-bool DefaultContextFactory::Initialize() {
-  // 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;
-  }
-  return true;
-}
-
-WebKit::WebGraphicsContext3D* DefaultContextFactory::CreateContext(
-    Compositor* compositor) {
-  return CreateContextCommon(compositor, false);
-}
-
-WebKit::WebGraphicsContext3D* DefaultContextFactory::CreateOffscreenContext(
-    Compositor* compositor) {
-  return CreateContextCommon(compositor, true);
-}
-
-void DefaultContextFactory::RemoveCompositor(Compositor* compositor) {
-}
-
-WebKit::WebGraphicsContext3D* DefaultContextFactory::CreateContextCommon(
-    Compositor* compositor,
-    bool offscreen) {
-  WebKit::WebGraphicsContext3D::Attributes attrs;
-  attrs.shareResources = true;
-  WebKit::WebGraphicsContext3D* context =
-      offscreen ?
-      webkit::gpu::WebGraphicsContext3DInProcessImpl::CreateForWebView(
-          attrs, false) :
-      webkit::gpu::WebGraphicsContext3DInProcessImpl::CreateForWindow(
-          attrs, compositor->widget(), share_group_.get());
-  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;
-}
-
-Texture::Texture(bool flipped, const gfx::Size& size)
-    : texture_id_(0),
-      flipped_(flipped),
-      size_(size) {
-}
-
-Texture::~Texture() {
-}
-
-Compositor::Compositor(CompositorDelegate* delegate,
-                       gfx::AcceleratedWidget widget,
-                       const gfx::Size& size)
-    : delegate_(delegate),
-      size_(size),
-      root_layer_(NULL),
-      widget_(widget),
-      root_web_layer_(WebKit::WebLayer::create()),
-      swap_posted_(false) {
-  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);
-  settings.perTilePainting =
-    command_line->HasSwitch(switches::kUIEnablePerTilePainting);
-
-  host_.initialize(this, root_web_layer_, settings);
-  root_web_layer_.setAnchorPoint(WebKit::WebFloatPoint(0.f, 0.f));
-  WidgetSizeChanged(size_);
-}
-
-Compositor::~Compositor() {
-  // 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);
-  if (root_layer_)
-    root_layer_->SetCompositor(NULL);
-  if (!test_compositor_enabled)
-    ContextFactory::GetInstance()->RemoveCompositor(this);
-}
-
-void Compositor::Initialize(bool use_thread) {
-  if (use_thread)
-    g_compositor_thread = new webkit_glue::WebThreadImpl("Browser Compositor");
-  WebKit::WebCompositor::initialize(g_compositor_thread);
-}
-
-void Compositor::Terminate() {
-  WebKit::WebCompositor::shutdown();
-  if (g_compositor_thread) {
-    delete g_compositor_thread;
-    g_compositor_thread = NULL;
-  }
-}
-
-void Compositor::ScheduleDraw() {
-  if (g_compositor_thread) {
-    // TODO(nduca): Temporary while compositor calls
-    // compositeImmediately() directly.
-    layout();
-    host_.composite();
-  } else {
-    delegate_->ScheduleDraw();
-  }
-}
-
-void Compositor::SetRootLayer(Layer* root_layer) {
-  if (root_layer_ == root_layer)
-    return;
-  if (root_layer_)
-    root_layer_->SetCompositor(NULL);
-  root_layer_ = root_layer;
-  if (root_layer_ && !root_layer_->GetCompositor())
-    root_layer_->SetCompositor(this);
-  root_web_layer_.removeAllChildren();
-  if (root_layer_)
-    root_web_layer_.addChild(root_layer_->web_layer());
-}
-
-void Compositor::Draw(bool force_clear) {
-  if (!root_layer_)
-    return;
-
-  // TODO(nduca): Temporary while compositor calls
-  // compositeImmediately() directly.
-  layout();
-  host_.composite();
-  if (!g_compositor_thread && !swap_posted_)
-    NotifyEnd();
-}
-
-void Compositor::ScheduleFullDraw() {
-  host_.setNeedsRedraw();
-}
-
-bool Compositor::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 Compositor::WidgetSizeChanged(const gfx::Size& size) {
-  if (size.IsEmpty())
-    return;
-  size_ = size;
-  host_.setViewportSize(size_);
-  root_web_layer_.setBounds(size_);
-}
-
-void Compositor::AddObserver(CompositorObserver* observer) {
-  observer_list_.AddObserver(observer);
-}
-
-void Compositor::RemoveObserver(CompositorObserver* observer) {
-  observer_list_.RemoveObserver(observer);
-}
-
-bool Compositor::HasObserver(CompositorObserver* observer) {
-  return observer_list_.HasObserver(observer);
-}
-
-void Compositor::OnSwapBuffersPosted() {
-  swap_posted_ = true;
-}
-
-void Compositor::OnSwapBuffersComplete() {
-  DCHECK(swap_posted_);
-  swap_posted_ = false;
-  NotifyEnd();
-}
-
-void Compositor::OnSwapBuffersAborted() {
-  if (swap_posted_) {
-    swap_posted_ = false;
-    NotifyEnd();
-  }
-}
-
-void Compositor::updateAnimations(double frameBeginTime) {
-}
-
-void Compositor::layout() {
-  if (root_layer_)
-    root_layer_->SendDamagedRects();
-}
-
-void Compositor::applyScrollAndScale(const WebKit::WebSize& scrollDelta,
-                                     float scaleFactor) {
-}
-
-WebKit::WebGraphicsContext3D* Compositor::createContext3D() {
-  if (test_compositor_enabled) {
-    ui::TestWebGraphicsContext3D* test_context =
-      new ui::TestWebGraphicsContext3D();
-   test_context->Initialize();
-   return test_context;
-  } else {
-    return ContextFactory::GetInstance()->CreateContext(this);
-  }
-}
-
-void Compositor::didRebindGraphicsContext(bool success) {
-}
-
-void Compositor::didCommitAndDrawFrame() {
-  FOR_EACH_OBSERVER(CompositorObserver,
-                    observer_list_,
-                    OnCompositingStarted(this));
-}
-
-void Compositor::didCompleteSwapBuffers() {
-  NotifyEnd();
-}
-
-void Compositor::scheduleComposite() {
-  ScheduleDraw();
-}
-
-void Compositor::SwizzleRGBAToBGRAAndFlip(unsigned char* pixels,
-                                          const gfx::Size& image_size) {
-  // Swizzle from RGBA to BGRA
-  size_t bitmap_size = 4 * image_size.width() * image_size.height();
-  for(size_t i = 0; i < bitmap_size; i += 4)
-    std::swap(pixels[i], pixels[i + 2]);
-
-  // Vertical flip to transform from GL co-ords
-  size_t row_size = 4 * image_size.width();
-  scoped_array<unsigned char> tmp_row(new unsigned char[row_size]);
-  for(int row = 0; row < image_size.height() / 2; row++) {
-    memcpy(tmp_row.get(),
-           &pixels[row * row_size],
-           row_size);
-    memcpy(&pixels[row * row_size],
-           &pixels[bitmap_size - (row + 1) * row_size],
-           row_size);
-    memcpy(&pixels[bitmap_size - (row + 1) * row_size],
-           tmp_row.get(),
-           row_size);
-  }
-}
-
-void Compositor::NotifyEnd() {
-  FOR_EACH_OBSERVER(CompositorObserver,
-                    observer_list_,
-                    OnCompositingEnded(this));
-}
-
-COMPOSITOR_EXPORT void SetupTestCompositor() {
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kDisableTestCompositor)) {
-    test_compositor_enabled = true;
-  }
-}
-
-COMPOSITOR_EXPORT void DisableTestCompositor() {
-  test_compositor_enabled = false;
-}
-
-COMPOSITOR_EXPORT bool IsTestCompositorEnabled() {
-  return test_compositor_enabled;
-}
-
-}  // namespace ui