Browser side changes for software compositing

content/browser/renderer_host/render_widget_host_view_aura.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/render_widget_host_view_aura.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 900 matching lines @@
 
 void RenderWidgetHostViewAura::Blur() {
   window_->Blur();
 }
 
 bool RenderWidgetHostViewAura::HasFocus() const {
   return window_->HasFocus();
 }
 
 bool RenderWidgetHostViewAura::IsSurfaceAvailableForCopy() const {
-  return current_surface_ || !!host_->GetBackingStore(false);
+  return current_surface_ || current_dib_ || !!host_->GetBackingStore(false);
 }
 
 void RenderWidgetHostViewAura::Show() {
   window_->Show();
 }
 
 void RenderWidgetHostViewAura::Hide() {
   window_->Hide();
 }
 
@@ skipping 334 matching lines @@
   }
 }
 
 void RenderWidgetHostViewAura::UpdateExternalTexture() {
   // Delay processing accelerated compositing state change till here where we
   // act upon the state change. (Clear the external texture if switching to
   // software mode or set the external texture if going to accelerated mode).
   if (accelerated_compositing_state_changed_)
     accelerated_compositing_state_changed_ = false;
 
-  if (current_surface_ && host_->is_accelerated_compositing_active()) {
+  bool is_compositing_active = host_->is_accelerated_compositing_active();
+  if (is_compositing_active && current_surface_) {
     window_->SetExternalTexture(current_surface_.get());
     gfx::Size container_size = ConvertSizeToDIP(this, current_surface_->size());
     CheckResizeLocks(container_size);
+  } else if (is_compositing_active && current_dib_) {
+    window_->SetExternalTexture(NULL);
+    gfx::Size frame_size = ConvertSizeToDIP(this, last_swapped_surface_size_);
+    CheckResizeLocks(frame_size);
   } else {
     window_->SetExternalTexture(NULL);
     resize_locks_.clear();
   }
 }
 
 bool RenderWidgetHostViewAura::SwapBuffersPrepare(
     const gfx::Rect& surface_rect,
     const gfx::Rect& damage_rect,
     const std::string& mailbox_name,
@@ skipping 26 matching lines @@
   released_front_lock_ = NULL;
   UpdateExternalTexture();
 
   return true;
 }
 
 void RenderWidgetHostViewAura::SwapBuffersCompleted(
     const BufferPresentedCallback& ack_callback,
     const scoped_refptr<ui::Texture>& texture_to_return) {
   ui::Compositor* compositor = GetCompositor();
-  if (!compositor) {
+  if (!compositor)
     ack_callback.Run(false, texture_to_return);
-  } else {
-    // Add sending an ACK to the list of things to do OnCompositingDidCommit
-    can_lock_compositor_ = NO_PENDING_COMMIT;
-    on_compositing_did_commit_callbacks_.push_back(
+  else
+    AddOnCommitCallbackAndDisableLocks(
         base::Bind(ack_callback, false, texture_to_return));

[piman, 2013/04/03 18:31:26]

nit: style requires braces for the else clause if it spans more than one line.
That in turn also requires braces on the if clause.

[slavi, 2013/04/03 21:38:22]

Done.

-    if (!compositor->HasObserver(this))
-      compositor->AddObserver(this);
-  }
 }
 
 #if defined(OS_WIN)
 void RenderWidgetHostViewAura::UpdateTransientRects(
     const std::vector<gfx::Rect>& rects) {
   transient_rects_ = rects;
   UpdateCutoutRects();
 }
 
 void RenderWidgetHostViewAura::UpdateConstrainedWindowRects(
@@ skipping 47 matching lines @@
   released_front_lock_ = NULL;
   CheckResizeLocks(frame_size_in_dip);
 
   if (paint_observer_)
     paint_observer_->OnUpdateCompositorContent();
 
   ui::Compositor* compositor = GetCompositor();
   if (!compositor) {
     SendDelegatedFrameAck();
   } else {
-    can_lock_compositor_ = NO_PENDING_COMMIT;
-    on_compositing_did_commit_callbacks_.push_back(
+    AddOnCommitCallbackAndDisableLocks(
         base::Bind(&RenderWidgetHostViewAura::SendDelegatedFrameAck,
-                   base::Unretained(this)));
-    if (!compositor->HasObserver(this))
-      compositor->AddObserver(this);
+                   AsWeakPtr()));
   }
 }
 
 void RenderWidgetHostViewAura::SendDelegatedFrameAck() {
   cc::CompositorFrameAck ack;
   window_->layer()->TakeUnusedResourcesForChildCompositor(&ack.resources);
   RenderWidgetHostImpl::SendSwapCompositorFrameAck(
       host_->GetRoutingID(), host_->GetProcess()->GetID(), ack);
 }
 
+void RenderWidgetHostViewAura::SwapSoftwareFrame(
+    scoped_ptr<cc::SoftwareFrameData> frame_data,
+    float frame_device_scale_factor) {
+  const gfx::Size& frame_size = frame_data->size;
+  const gfx::Rect& damage_rect = frame_data->damage_rect;
+  const TransportDIB::Id& dib_id = frame_data->dib_id;
+
+  scoped_ptr<TransportDIB> dib;
+#if defined(OS_WIN)
+  TransportDIB::Handle my_handle = TransportDIB::DefaultHandleValue();
+  ::DuplicateHandle(host_->GetProcess()->GetHandle(), dib_id.handle,
+                    ::GetCurrentProcess(), &my_handle,
+                    0, FALSE, DUPLICATE_SAME_ACCESS);
+  dib.reset(TransportDIB::Map(my_handle));
+#elif defined(USE_X11)
+  dib.reset(TransportDIB::Map(dib_id.shmkey));
+#else
+  NOTIMPLEMENTED();
+#endif
+
+  // Validate the received DIB.
+  size_t expected_size = 4 * frame_size.GetArea();
+  if (!dib || dib->size() < expected_size) {
+    host_->GetProcess()->ReceivedBadMessage();
+    return;
+  }
+
+  if (last_swapped_surface_size_ != frame_size)
+    DLOG_IF(ERROR, damage_rect != gfx::Rect(frame_size))

[piman, 2013/04/03 18:31:26]

nit: braces

[slavi, 2013/04/03 21:38:22]

Done.

+      << "Expected full damage rect";
+
+  // Update current_dib_ and friends.

[piman, 2013/04/03 18:31:26]

nit: unnecessary comment.

[slavi, 2013/04/03 21:38:22]

Done.

+  TransportDIB::Id last_dib_id = current_dib_id_;
+  current_dib_.reset(dib.release());
+  current_dib_id_ = dib_id;
+  last_swapped_surface_size_ = frame_size;
+  previous_damage_.op(RectToSkIRect(damage_rect), SkRegion::kUnion_Op);
+
+  ui::Compositor* compositor = GetCompositor();
+  gfx::Size frame_size_in_dip = gfx::ToFlooredSize(
+      gfx::ScaleSize(frame_size, 1.0f / frame_device_scale_factor));
+  if (!compositor || ShouldSkipFrame(frame_size_in_dip)) {
+    SendSoftwareFrameAck(last_dib_id);
+    return;
+  }
+
+  window_->SetExternalTexture(NULL);
+  released_front_lock_ = NULL;
+  CheckResizeLocks(frame_size_in_dip);
+  AddOnCommitCallbackAndDisableLocks(
+      base::Bind(&RenderWidgetHostViewAura::SendSoftwareFrameAck,
+                 AsWeakPtr(), last_dib_id));
+
+  if (paint_observer_)
+    paint_observer_->OnUpdateCompositorContent();
+  window_->SchedulePaintInRect(ConvertRectToDIP(this, damage_rect));
+}
+
+void RenderWidgetHostViewAura::SendSoftwareFrameAck(
+    const TransportDIB::Id& id) {
+  cc::CompositorFrameAck ack;
+  ack.last_dib_id = id;
+  RenderWidgetHostImpl::SendSwapCompositorFrameAck(
+      host_->GetRoutingID(), host_->GetProcess()->GetID(), ack);
+}
+
+
 void RenderWidgetHostViewAura::OnSwapCompositorFrame(
     scoped_ptr<cc::CompositorFrame> frame) {
   if (frame->delegated_frame_data) {
     SwapDelegatedFrame(frame->delegated_frame_data.Pass(),
                        frame->metadata.device_scale_factor);
     return;
   }
+
+  if (frame->software_frame_data) {
+    SwapSoftwareFrame(frame->software_frame_data.Pass(),
+                      frame->metadata.device_scale_factor);
+    return;
+  }
+
   if (!frame->gl_frame_data || frame->gl_frame_data->mailbox.IsZero())
     return;
 
   BufferPresentedCallback ack_callback = base::Bind(
       &SendCompositorFrameAck,
       host_->GetRoutingID(), host_->GetProcess()->GetID(),
       frame->gl_frame_data->mailbox, frame->gl_frame_data->size);
 
   if (!frame->gl_frame_data->sync_point) {
     LOG(ERROR) << "CompositorFrame without sync point. Skipping frame...";
     ack_callback.Run(true, scoped_refptr<ui::Texture>());
     return;
   }
 
   ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
   factory->WaitSyncPoint(frame->gl_frame_data->sync_point);
 
   std::string mailbox_name(
       reinterpret_cast<const char*>(frame->gl_frame_data->mailbox.name),
       sizeof(frame->gl_frame_data->mailbox.name));
   BuffersSwapped(
       frame->gl_frame_data->size, mailbox_name, ack_callback);
 }
 
 void RenderWidgetHostViewAura::BuffersSwapped(
     const gfx::Size& size,
     const std::string& mailbox_name,
     const BufferPresentedCallback& ack_callback) {
   scoped_refptr<ui::Texture> texture_to_return(current_surface_);
-  const gfx::Rect surface_rect = gfx::Rect(gfx::Point(), size);
+  const gfx::Rect surface_rect = gfx::Rect(size);
   if (!SwapBuffersPrepare(
       surface_rect, surface_rect, mailbox_name, ack_callback)) {
     return;
   }
 
   previous_damage_.setRect(RectToSkIRect(surface_rect));
   skipped_damage_.setEmpty();
 
   ui::Compositor* compositor = GetCompositor();
   if (compositor) {
     gfx::Size surface_size = ConvertSizeToDIP(this, size);
     window_->SchedulePaintInRect(gfx::Rect(surface_size));
   }
 
   if (paint_observer_)
     paint_observer_->OnUpdateCompositorContent();
 
   SwapBuffersCompleted(ack_callback, texture_to_return);
 }
 
 void RenderWidgetHostViewAura::AcceleratedSurfacePostSubBuffer(
     const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params_in_pixel,
     int gpu_host_id) {
   scoped_refptr<ui::Texture> previous_texture(current_surface_);
   const gfx::Rect surface_rect =
-      gfx::Rect(gfx::Point(), params_in_pixel.surface_size);
+      gfx::Rect(params_in_pixel.surface_size);
   gfx::Rect damage_rect(params_in_pixel.x,
                         params_in_pixel.y,
                         params_in_pixel.width,
                         params_in_pixel.height);
   BufferPresentedCallback ack_callback = base::Bind(
       &AcknowledgeBufferForGpu, params_in_pixel.route_id, gpu_host_id,
       params_in_pixel.mailbox_name);
 
   if (!SwapBuffersPrepare(
       surface_rect, damage_rect, params_in_pixel.mailbox_name, ack_callback)) {
@@ skipping 53 matching lines @@
 void RenderWidgetHostViewAura::AcceleratedSurfaceSuspend() {
 }
 
 void RenderWidgetHostViewAura::AcceleratedSurfaceRelease() {
   // This really tells us to release the frontbuffer.
   if (current_surface_) {
     ui::Compositor* compositor = GetCompositor();
     if (compositor) {
       // We need to wait for a commit to clear to guarantee that all we
       // will not issue any more GL referencing the previous surface.
-      can_lock_compositor_ = NO_PENDING_COMMIT;
-      on_compositing_did_commit_callbacks_.push_back(
+      AddOnCommitCallbackAndDisableLocks(
           base::Bind(&RenderWidgetHostViewAura::
                      SetSurfaceNotInUseByCompositor,
                      AsWeakPtr(),
                      current_surface_));  // Hold a ref so the texture will not
                                           // get deleted until after commit.
-      if (!compositor->HasObserver(this))
-        compositor->AddObserver(this);
     }
     current_surface_ = NULL;
     UpdateExternalTexture();
   }
 }
 
 bool RenderWidgetHostViewAura::HasAcceleratedSurface(
       const gfx::Size& desired_size) {
   // Aura doesn't use GetBackingStore for accelerated pages, so it doesn't
   // matter what is returned here as GetBackingStore is the only caller of this
@@ skipping 362 matching lines @@
 
 bool RenderWidgetHostViewAura::CanFocus() {
   return popup_type_ == WebKit::WebPopupTypeNone;
 }
 
 void RenderWidgetHostViewAura::OnCaptureLost() {
   host_->LostCapture();
 }
 
 void RenderWidgetHostViewAura::OnPaint(gfx::Canvas* canvas) {
-  paint_canvas_ = canvas;
-  BackingStore* backing_store = host_->GetBackingStore(true);
-  paint_canvas_ = NULL;
-  if (backing_store) {
-    static_cast<BackingStoreAura*>(backing_store)->SkiaShowRect(gfx::Point(),
-                                                                canvas);
+  bool is_compositing_active = host_->is_accelerated_compositing_active();
+  bool has_backing_store = !!host_->GetBackingStore(false);
+  if (is_compositing_active && current_dib_) {
+    SkBitmap bitmap;
+    bitmap.setConfig(SkBitmap::kARGB_8888_Config,
+                     last_swapped_surface_size_.width(),
+                     last_swapped_surface_size_.height());
+    bitmap.setPixels(current_dib_->memory());
+
+    SkCanvas* sk_canvas = canvas->sk_canvas();
+    for (SkRegion::Iterator it(previous_damage_); !it.done(); it.next()) {
+      const SkIRect& src_rect = it.rect();
+      SkRect dst_rect = SkRect::Make(src_rect);
+      sk_canvas->drawBitmapRect(bitmap, &src_rect, dst_rect, NULL);
+    }
+    previous_damage_.setEmpty();
+
+    if (paint_observer_)
+      paint_observer_->OnPaintComplete();
+  } else if (!is_compositing_active && has_backing_store) {
+    paint_canvas_ = canvas;
+    BackingStoreAura* backing_store = static_cast<BackingStoreAura*>(
+        host_->GetBackingStore(true));
+    paint_canvas_ = NULL;
+    backing_store->SkiaShowRect(gfx::Point(), canvas);
+
     if (paint_observer_)
       paint_observer_->OnPaintComplete();
   } else if (aura::Env::GetInstance()->render_white_bg()) {
     canvas->DrawColor(SK_ColorWHITE);
   }
 }
 
 void RenderWidgetHostViewAura::OnDeviceScaleFactorChanged(
     float device_scale_factor) {
   if (!host_)
@@ skipping 397 matching lines @@
 
 void RenderWidgetHostViewAura::OnCompositingDidCommit(
     ui::Compositor* compositor) {
   if (can_lock_compositor_ == NO_PENDING_COMMIT) {
     can_lock_compositor_ = YES;
     for (ResizeLockList::iterator it = resize_locks_.begin();
         it != resize_locks_.end(); ++it)
       if ((*it)->GrabDeferredLock())
         can_lock_compositor_ = YES_DID_LOCK;
   }
-  RunCompositingDidCommitCallbacks();
+  RunOnCommitCallbacks();
   locks_pending_commit_.clear();
 }
 
 void RenderWidgetHostViewAura::OnCompositingStarted(
     ui::Compositor* compositor, base::TimeTicks start_time) {
   last_draw_ended_ = start_time;
 }
 
 void RenderWidgetHostViewAura::OnCompositingEnded(
     ui::Compositor* compositor) {
@@ skipping 78 matching lines @@
 // RenderWidgetHostViewAura, ImageTransportFactoryObserver implementation:
 
 void RenderWidgetHostViewAura::OnLostResources() {
   current_surface_ = NULL;
   UpdateExternalTexture();
   locks_pending_commit_.clear();
 
   // Make sure all ImageTransportClients are deleted now that the context those
   // are using is becoming invalid. This sends pending ACKs and needs to happen
   // after calling UpdateExternalTexture() which syncs with the impl thread.
-  RunCompositingDidCommitCallbacks();
+  RunOnCommitCallbacks();
 
   DCHECK(!shared_surface_handle_.is_null());
   ImageTransportFactory* factory = ImageTransportFactory::GetInstance();
   factory->DestroySharedSurfaceHandle(shared_surface_handle_);
   shared_surface_handle_ = factory->CreateSharedSurfaceHandle();
   host_->CompositingSurfaceUpdated();
   host_->ScheduleComposite();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ skipping 135 matching lines @@
   gfx::Rect rect = window_->bounds();
   int border_x = rect.width() * kMouseLockBorderPercentage / 100;
   int border_y = rect.height() * kMouseLockBorderPercentage / 100;
 
   return global_mouse_position_.x() < rect.x() + border_x ||
       global_mouse_position_.x() > rect.right() - border_x ||
       global_mouse_position_.y() < rect.y() + border_y ||
       global_mouse_position_.y() > rect.bottom() - border_y;
 }
 
-void RenderWidgetHostViewAura::RunCompositingDidCommitCallbacks() {
+void RenderWidgetHostViewAura::RunOnCommitCallbacks() {
   for (std::vector<base::Closure>::const_iterator
       it = on_compositing_did_commit_callbacks_.begin();
       it != on_compositing_did_commit_callbacks_.end(); ++it) {
     it->Run();
   }
   on_compositing_did_commit_callbacks_.clear();
 }
 
+void RenderWidgetHostViewAura::AddOnCommitCallbackAndDisableLocks(
+    const base::Closure& callback) {
+  ui::Compositor* compositor = GetCompositor();
+  DCHECK(compositor);
+
+  if (!compositor->HasObserver(this))
+    compositor->AddObserver(this);
+
+  can_lock_compositor_ = NO_PENDING_COMMIT;
+  on_compositing_did_commit_callbacks_.push_back(callback);
+}
+
 void RenderWidgetHostViewAura::AddedToRootWindow() {
   window_->GetRootWindow()->AddRootWindowObserver(this);
   host_->ParentChanged(GetNativeViewId());
   UpdateScreenInfo(window_);
   if (popup_type_ != WebKit::WebPopupTypeNone)
     event_filter_for_popup_exit_.reset(new EventFilterForPopupExit(this));
 }
 
 void RenderWidgetHostViewAura::RemovingFromRootWindow() {
   event_filter_for_popup_exit_.reset();
   window_->GetRootWindow()->RemoveRootWindowObserver(this);
   host_->ParentChanged(0);
   // We are about to disconnect ourselves from the compositor, we need to issue
   // the callbacks now, because we won't get notified when the frame is done.
   // TODO(piman): this might in theory cause a race where the GPU process starts
   // drawing to the buffer we haven't yet displayed. This will only show for 1
   // frame though, because we will reissue a new frame right away without that
   // composited data.
   ui::Compositor* compositor = GetCompositor();
-  RunCompositingDidCommitCallbacks();
+  RunOnCommitCallbacks();
   locks_pending_commit_.clear();
   if (compositor && compositor->HasObserver(this))
     compositor->RemoveObserver(this);
 }
 
 ui::Compositor* RenderWidgetHostViewAura::GetCompositor() {
   aura::RootWindow* root_window = window_->GetRootWindow();
   return root_window ? root_window->compositor() : NULL;
 }
 
@@ skipping 11 matching lines @@
     RenderWidgetHost* widget) {
   return new RenderWidgetHostViewAura(widget);
 }
 
 // static
 void RenderWidgetHostViewPort::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content